US 9,797,486 B2Grant
Adapter direct drive with manual retraction, lockout and connection mechanisms
Issue Date:2017-10-24
•10 Claims
•20 Drawing Sheets
Abstract
A surgical device adapter for coupling an end effector to a handle assembly is disclosed. The surgical device adapter includes: a housing; a drive mechanism disposed within the housing and couplable to the handle assembly and the end effector; and a drive coupling assembly coupled to the surgical device adapter and selectively couplable to the handle assembly, the drive coupling assembly including a retraction assembly selectively couplable to the drive mechanism such that rotation of the drive coupling assembly about a longitudinal axis defined by the surgical device adapter and relative to the housing actuates the drive mechanism.
Metadata
Assignee
- Covidien LP
Inventors
- Earl Zergiebel
- Ramiro Cabrera
- Paul Richard
- David Chowaniec
- Ryan Williams
- Anand Subramanian
Application Information
Application Number:US 14/286,053
Filing Date:2014-05-23
Priority Date:2013-06-20
Art Unit:3721
Classifications
IPC:
A61B17/04A61B17/10F16H19/02A61B17/072A61B90/00A61B17/00A61B17/29
Field of Search:
A61B 17/068A61B 2017/00477A61B 2017/07278A61B 2017/292A61B 2017/294A61B 2017/320016
Patent Drawings (20 sheets)
Description
Cross-Reference to Related Applications
[0001] This application claims the benefit of and priority to U.S. Provisional Patent Application No. 61/837,225, filed Jun. 20, 2013, the entire disclosure of which is incorporated by reference herein.
Background
[0002] 1. Technical Field
[0003] The present disclosure relates to surgical apparatuses, devices and/or systems for performing endoscopic surgical procedures and methods of use thereof. More specifically, the present disclosure relates to electromechanical, hand-held surgical apparatuses, adapters, devices and/or systems configured for use with removable disposable loading units and/or single use loading units for clamping, cutting and/or stapling tissue.
[0004] 2. Background of Related Art
[0005] Currently there are various drive systems for operating and/or manipulating electromechanical surgical devices. In many instances the electromechanical surgical devices include a reusable handle assembly, and disposable or single-use loading units. The loading units are selectively connected to the handle assembly prior to use and then disconnected from the handle assembly following use in order to be disposed of or in some instances sterilized for re-use.
[0006] Many of the existing end effectors for use with many of the existing surgical devices and/or handle assemblies are driven by a linear force. For examples, end effectors for performing endo-gastrointestinal anastomosis procedures, end-to-end anastomosis procedures and transverse anastomosis procedures, each typically require a linear driving force in order to be operated. As such, these end effectors are not compatible with surgical devices and/or handle assemblies that use rotary motion to deliver power or the like.
[0007] In order to make the linear driven end effectors compatible with surgical devices and/or handle assemblies that use a rotary motion to deliver power, a need exists for adapters and/or adapter assemblies to interface between and interconnect the linear driven end effectors with the rotary driven surgical devices and/or handle assemblies. There is also a need for adapters that include manual retraction, connection, and locking and release mechanisms for coupling to the surgical devices.
Summary
[0008] Further details and aspects of exemplary embodiments of the present invention are described in more detail below with reference to the appended Figures.
[0009] According to one embodiment of the present disclosure, a surgical device adapter for coupling an end effector to a handle assembly is disclosed. The surgical device adapter includes: a housing; a drive mechanism disposed within the housing and couplable to the handle assembly and the end effector; and a drive coupling assembly coupled to the surgical device adapter and selectively couplable to the handle assembly, the drive coupling assembly including a refraction assembly selectively couplable to the drive mechanism such that rotation of the drive coupling assembly about a longitudinal axis defined by the surgical device adapter and relative to the housing actuates the drive mechanism.
[0010] According to one aspect of the above embodiment, the drive mechanism includes a first drive screw coupled to the end effector and configured to actuate the end effector, the first drive screw mechanically engaged to a first gear disposed within the drive coupling assembly.
[0011] According to one aspect of the above embodiment, the retraction assembly includes: a lock rocker pivotally coupled within the drive coupling assembly; and a lock ring rotatable about the longitudinal axis and relative to the drive coupling assembly, wherein upon rotation thereof the lock ring is configured to actuate the lock rocker to meshingly-engage the lock rocker with the first gear.
[0012] According to one aspect of the above embodiment, the retraction assembly further includes: a spring-loaded lock bolt slidably coupled to the drive coupling and engaged with the lock ring, the lock bolt configured to prevent rotation of the lock ring.
[0013] According to one aspect of the above embodiment, the lock ring further includes a flexible, resilient tab configured to engage the drive coupling assembly and prevent rotation of the lock ring.
[0014] According to one aspect of the above embodiment, the drive coupling assembly includes at least one latch pivotally coupled therein and configured to engage the handle assembly.
[0015] According to one aspect of the above embodiment, the at latch includes a tab coupled to a distal end thereof, the tab configured to engage the first gear.
[0016] According to one aspect of the above embodiment, the drive coupling assembly includes a lock ring rotatable relative to the drive coupling assembly, wherein upon rotation the lock ring is configured to engage the tab to meshingly-engage the tab with the first gear.
[0017] According to one aspect of the above embodiment, the drive mechanism includes a second drive screw coupled to the end effector and configured to articulate the end effector about a pivot axis transverse to the longitudinal axis, the second drive screw mechanically engaged to a second gear disposed within the drive coupling assembly.
[0018] According to one aspect of the above embodiment, the retraction assembly includes: a cam lock including a cam slot; and a slidable button slidably disposed within the drive coupling assembly, the slidable button including a pin disposed within the cam slot, wherein proximal movement of the slidable button actuates the cam lock to meshingly-engage with the second gear.
[0019] According to one aspect of the above embodiment, the retraction assembly further includes a spring-loaded release switch slidably coupled to the drive coupling configured to prevent longitudinal movement of the slidable button.
[0020] According to one aspect of the above embodiment, the slidable button further includes a latch at a proximal end thereof configured to engage the drive coupling assembly when the slidable button is moved in a proximal direction.
[0021] According to one embodiment of the present disclosure, a surgical device is disclosed. The surgical device includes: an end effector including a first jaw and a second jaw moveable relative to the first jaw; a handle assembly including at least one motor mechanically coupled to the jaw assembly; an adapter assembly removably coupled to a proximal end of the jaw assembly and a distal end of the handle assembly. The adapter assembly includes: a housing; a drive mechanism disposed within the housing and configured to couple the at least one motor to the end effector; and a drive coupling assembly coupled to the surgical device adapter and selectively couplable to the surgical instrument, the drive coupling assembly including a retraction assembly selectively couplable to the drive mechanism such that rotation of the drive coupling assembly about a longitudinal axis defined by the surgical device adapter and relative to the housing actuates the drive mechanism.
[0022] According to one aspect of the above embodiment, the drive mechanism includes: a first drive screw coupled to the end effector and configured to actuate the first and second jaws, the first drive screw mechanically engaged to a first gear disposed within the drive coupling assembly; and a second drive screw coupled to the end effector and configured to articulate the end effector about a pivot axis transverse to the longitudinal axis, the second drive screw mechanically engaged to a second gear disposed within the drive coupling assembly.
[0023] According to one aspect of the above embodiment, the retraction assembly includes: a lock rocker pivotally coupled within the drive coupling assembly; and a lock ring rotatable relative to the drive coupling assembly, wherein upon rotation thereof the lock ring is configured to engage the lock rocker to meshingly-engage the lock rocker with the first gear.
[0024] According to one aspect of the above embodiment, the retraction assembly further includes a spring-loaded lock bolt slidably coupled to the drive coupling and engaged with the lock ring, the lock bolt configured to prevent rotation of the lock ring.
[0025] According to one aspect of the above embodiment, the lock ring further includes a flexible, resilient tab configured to engage the drive coupling assembly and prevent rotation of the lock ring.
[0026] According to one aspect of the above embodiment, the drive coupling assembly includes at least one latch pivotally coupled therein and configured to engage the surgical device, wherein the at least one latch includes a tab coupled to a distal end thereof, the tab configured to engage the first gear.
[0027] According to one aspect of the above embodiment, the drive coupling assembly includes a lock ring rotatable relative to the drive coupling assembly, wherein upon rotation thereof the lock ring is configured to engage the tab to meshingly-engage the tab with the first gear.
[0028] According to one aspect of the above embodiment, the retraction assembly includes: a cam lock including a cam slot; and a slidable button slidably disposed within the drive coupling assembly, the slidable button including a pin disposed within the cam slot, wherein proximal movement of the slidable button actuates the cam lock to meshingly-engage with the second gear; and a spring-loaded release switch slidably coupled to the drive coupling configured to prevent longitudinal movement of the slidable button.
Brief Description of the Drawings
[0029] Embodiments of the present disclosure are described herein with reference to the accompanying drawings, wherein:
[0030] FIG. 1 is a perspective view of an electromechanical surgical system including a surgical instrument, an end effector and an adapter assembly according to the present disclosure;
[0031] FIG. 2 is a perspective, front view of the surgical instrument of FIG. 1 , according to the present disclosure;
[0032] FIG. 3 is a perspective, rear view of the adapter assembly of FIG. 1 , according to the present disclosure;
[0033] FIG. 4 is a rear view of the adapter assembly of FIG. 1 , according to the present disclosure;
[0034] FIG. 5 is a further perspective, rear view of the adapter assembly of FIG. 1 , according to the present disclosure;
[0035] FIG. 6 is a perspective view of a drive coupling of the adapter assembly of FIG. 1 , according to the present disclosure;
[0036] FIG. 7 is a perspective view of a pair of opposing latches of the drive coupling of FIG. 6 , according to the present disclosure;
[0037] FIG. 8 is a perspective view of one latch of the pair of latches of FIG. 7 , according to the present disclosure;
[0038] FIG. 9 is a perspective, partially-disassembled view of the adapter assembly of FIG. 1 , according to the present disclosure;
[0039] FIG. 10 is a perspective view of a proximal housing block of the adapter assembly of FIG. 1 , according to the present disclosure;
[0040] FIG. 11 is a perspective view of shafts and a pin of the adapter assembly of FIG. 1 , according to the present disclosure;
[0041] FIG. 12 is a rear, partially-disassembled view of the adapter assembly of FIG. 1 , according to the present disclosure;
[0042] FIG. 13 is a perspective view of a proximal housing block of the adapter assembly of FIG. 1 , according to the present disclosure;
[0043] FIG. 14 is a cross-sectional, side view of the adapter assembly of FIG. 1 , taken across the lines 14-14 of FIG. 3 , according to the present disclosure;
[0044] FIG. 15 is a partially-disassembled, side view of the drive coupling assembly including a retraction assembly and the adapter assembly of FIG. 1 , according to the present disclosure;
[0045] FIG. 16 is a perspective view of the drive coupling assembly of FIG. 15 , according to the present disclosure;
[0046] FIG. 17 is a cross-sectional view of the adapter assembly of FIG. 15 , taken along the line 17-17 of FIG. 16 , with a lock rocker of the retraction assembly disengaged from a drive mechanism, according to the present disclosure;
[0047] FIG. 18 is a cross-sectional view of the adapter assembly of FIG. 15 , taken along the line 17-17 of FIG. 16 , with the lock rocker of the retraction assembly engaged to the drive mechanism, according to the present disclosure;
[0048] FIG. 19 is a cross-sectional view of the adapter assembly of FIG. 15 , taken along the line 14-14 of FIG. 3 , with a lock bolt engaged with a lock ring of the retraction assembly, according to the present disclosure;
[0049] FIG. 20 is a perspective, partially-disassembled view of the drive mechanism of FIG. 17 , according to the present disclosure;
[0050] FIG. 21 is a rear, partially-disassembled view of the adapter assembly of FIG. 15 , according to the present disclosure;
[0051] FIG. 22 is a perspective view of a spacer, according to the present disclosure;
[0052] FIG. 23 is a side, partially-disassembled view of the adapter assembly of FIG. 15 , according to the present disclosure;
[0053] FIG. 24 is a rear view of the adapter assembly of FIG. 15 , according to the present disclosure;
[0054] FIG. 25 is a perspective view of the lock bolt of FIG. 19 , according to the present disclosure;
[0055] FIG. 26 is a perspective view of the lock rocker of FIG. 17 , according to the present disclosure;
[0056] FIG. 27 is a perspective view of the lock ring of FIG. 19 , according to the present disclosure;
[0057] FIG. 28 is a perspective, partially-disassembled view of the retraction assembly of FIG. 17 in its home configuration, according to the present disclosure;
[0058] FIG. 29 is a perspective, partially-disassembled view of the retraction assembly of FIG. 17 with the lock bolt disengaged from the lock ring, according to the present disclosure;
[0059] FIG. 30 is a perspective, partially-disassembled view of the retraction assembly of FIG. 17 with the lock ring partially-rotated, according to the present disclosure;
[0060] FIG. 31 is a perspective, partially-disassembled view of the retraction assembly of FIG. 17 with the lock ring fully rotated pivoting the lock, according to the present disclosure;
[0061] FIG. 32 is a side view of the drive coupling assembly with a retraction assembly according to another embodiment of the present disclosure;
[0062] FIG. 33 is a perspective view of a lock bolt of the retraction assembly of FIG. 32 , according to the present disclosure;
[0063] FIG. 34 is a perspective view of a lock ring of the retraction assembly of FIG. 32 , according to the present disclosure;
[0064] FIG. 35 is a side view of the drive coupling assembly with a retraction assembly according to another embodiment of the present disclosure;
[0065] FIG. 36 is a perspective view of a lock ring of the retraction assembly of FIG. 35 , according to the present disclosure;
[0066] FIG. 37 is a perspective, partially-disassembled view of the drive coupling assembly with a retraction assembly according to another embodiment of the present disclosure;
[0067] FIG. 38 is a perspective, partially-disassembled view of a lock ring and latches of the refraction assembly of FIG. 37 , according to the present disclosure;
[0068] FIG. 39 is a rear, perspective view of the adapter assembly of FIG. 1 with an articulation drive mechanism and an articulation retraction assembly, according to the present disclosure;
[0069] FIG. 40 is a side, partially-disassembled view of the articulation retraction assembly of FIG. 39 , according to the present disclosure;
[0070] FIG. 41 is a side view of a slidable button and a cam lock of the articulation retraction assembly of FIG. 39 , according to the present disclosure;
[0071] FIG. 42 is a side view of the adapter assembly of FIG. 1 with the articulation retraction assembly in a home configuration, according to the present disclosure;
[0072] FIG. 43 is a side view of the adapter assembly of FIG. 1 with the articulation retraction assembly engaged with the articulation drive mechanism, according to the present disclosure;
[0073] FIG. 44 is a side view of the adapter assembly of FIG. 1 with the articulation retraction assembly in a home configuration and a release switch in a closed configuration, according to the present disclosure;
[0074] FIG. 45 is a side view of the adapter assembly of FIG. 1 with a release switch in an open configuration and the slidable button in a distal configuration, according to the present disclosure;
[0075] FIG. 46 is a side view of the adapter assembly of FIG. 1 with a release switch in the open configuration and the slidable button in a proximal configuration, according to the present disclosure; and
[0076] FIG. 47 is a side view of the adapter assembly of FIG. 1 with a release switch in the closed configuration and the slidable button in the proximal configuration, according to the present disclosure.
Detailed Description of Embodiments
[0077] Embodiments of the presently disclosed electromechanical surgical system, apparatus and/or device are described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views. As used herein the term “distal” refers to that portion of the electromechanical surgical system, apparatus and/or device, or component thereof, that are farther from the user, while the term “proximal” refers to that portion of the electromechanical surgical system, apparatus and/or device, or component thereof, that are closer to the user. The terms “left” and “right” refer to that portion of the electromechanical surgical system, apparatus and/or device, or component thereof, that are on the left and right sides, respectively, from the perspective of the user facing the distal end of the electromechanical surgical system, apparatus and/or device from the proximal end while the surgical system, apparatus and/or device is oriented in non-rotational (e.g., home) configuration.
[0078] Referring initially to FIGS. 1-3 , an electromechanical, hand-held, powered surgical system, in accordance with an embodiment of the present disclosure is shown and generally designated 10. Electromechanical surgical system 10 includes a surgical apparatus or device in the form of an electromechanical, hand-held, powered surgical instrument 100 that is configured for selective attachment thereto of a plurality of different end effectors 300, via an adapter assembly 200 (e.g., elongated body). The end effector 300 and the adapter assembly 200 are configured for actuation and manipulation by the electromechanical, hand-held, powered surgical instrument 100. In particular, the surgical instrument 100, the adapter assembly 200, and the end effector 300 are separable from each other such that the surgical instrument 100 is configured for selective connection with adapter assembly 200, and, in turn, adapter assembly 200 is configured for selective connection with any one of a plurality of different end effectors 300.
[0079] Reference may be made to International Application No. PCT/US2008/077249, filed Sep. 22, 2008 (Inter. Pub. No. WO 2009/039506) and U.S. Patent Application Publication No. 2011/0121049, the entire contents of all of which are incorporated herein by reference, for a detailed description of the construction and operation of exemplary electromechanical, hand-held, powered surgical instrument 100.
[0080] As illustrated in FIGS. 1 and 2 , surgical instrument 100 includes a handle housing 102 including one or more controllers, a power source, and a drive mechanism having one or more motors, gear selector boxes, gearing mechanisms, and the like. The housing 102 also supports a control assembly 103. Control assembly 103 may include one or more finger-actuated control buttons, rocker devices, joystick or other directional controls, whose input is transferred to the drive mechanism to actuation the adapter assembly 200 and the end effector 300.
[0081] In particular, drive mechanism is configured to drive shafts and/or gear components in order to selectively move tool assembly 304 of end effector 300 relative to proximal body portion 302 of end effector 300, to rotate end effector 300 about a longitudinal axis “X-X” (FIG. 1 ) defined by the adapter assembly 200 relative to handle housing 102, to move anvil assembly 306 relative to cartridge assembly 308 of end effector 300, and/or to fire a stapling and cutting cartridge within cartridge assembly 308 of end effector 300.
[0082] With continued reference to FIG. 2 , the housing 102 defines a nose or connecting portion 108 configured to accept a corresponding drive coupling assembly 210 of adapter assembly 200. The connecting portion 108 of surgical instrument 100 has a cylindrical recess 108b that receives the drive coupling assembly 210 of adapter assembly 200 when adapter assembly 200 is mated to surgical instrument 100. Connecting portion 108 houses one or more rotatable drive connectors that interface with corresponding rotatable connector sleeves of the adapter assembly 200 as described in further detail below. The surgical instrument 100 include rotatable drive connector 118, 120, 122 disposed within the connecting portion 108 that are actuated by the drive mechanism.
[0083] With reference to FIGS. 2 and 4 , when adapter assembly 200 is mated to surgical instrument 100, each of rotatable drive connectors 118, 120, 122 of surgical instrument 100 couples with a corresponding rotatable connector sleeve 218, 220, 222 of adapter assembly 200. In this regard, the interface between corresponding first drive connector 118 and first connector sleeve 218, the interface between corresponding second drive connector 120 and second connector sleeve 220, and the interface between corresponding third drive connector 122 and third connector sleeve 222 are keyed such that rotation of each of drive connectors 118, 120, 122 of surgical instrument 100 causes a corresponding rotation of the corresponding connector sleeve 218, 220, 222 of adapter assembly 200.
[0084] The mating of drive connectors 118, 120, 122 of surgical instrument 100 with connector sleeves 218, 220, 222 of adapter assembly 200 allows rotational forces to be independently transmitted via each of the three respective connector interfaces. The drive connectors 118, 120, 122 of surgical instrument 100 are configured to be independently rotated by drive mechanism.
[0085] Since each of drive connectors 118, 120, 122 of surgical instrument 100 has a keyed and/or substantially non-rotatable interface with respective connector sleeves 218, 220, 222 of adapter assembly 200, when adapter assembly 200 is coupled to surgical instrument 100, rotational force(s) are selectively transferred from drive mechanism of surgical instrument 100 to adapter assembly 200.
[0086] The selective rotation of drive connector(s) 118, 120 and/or 122 of surgical instrument 100 allows surgical instrument 100 to selectively actuate different functions of end effector 300. As discussed in greater detail below, selective and independent rotation of first drive connector 118 of surgical instrument 100 corresponds to the selective and independent opening and closing of tool assembly 304 of end effector 300, and driving of a stapling/cutting component of tool assembly 304 of end effector 300. Also, the selective and independent rotation of second drive connector 120 of surgical instrument 100 corresponds to the selective and independent articulation of tool assembly 304 of end effector 300 about an articulation axis that is transverse to longitudinal axis “X-X” (FIG. 1 ). In particular, the end effector 300 defines a second longitudinal axis and is movable from a first position in which the second longitudinal axis is substantially aligned with the first longitudinal axis “X-X” to at least a second position in which the second longitudinal axis is disposed at a non-zero angle with respect to the first longitudinal axis “X-X.” Additionally, the selective and independent rotation of third drive connector 122 of surgical instrument 100 corresponds to the selective and independent rotation of end effector 300 about longitudinal axis “X-X” (FIG. 1 ) relative to handle housing 102 of surgical instrument 100.
[0087] With reference to FIGS. 3 and 5 , the drive coupling assembly 210 of adapter assembly 200 includes an orienting groove 230 for orienting the adapter assembly 200 to the instrument 100. The adapter assembly 200 also includes an adapter housing 232 coupled to the coupling assembly 210 which encloses a drive mechanism 330 as described in further detail below with respect to FIGS. 20 and 21 . In embodiments, the drive coupling assembly 210 may be removably coupled to the drive housing 232. The adapter housing 232 may include two portions interconnected via fasteners 233 (FIG. 14 ).
[0088] With reference to FIGS. 6-8 , the drive coupling assembly 210 includes a pair of opposing, spring-loaded latches 236. Each of the latches 236 includes a tooth 242, a pivot pin 238 pivotally coupling the latch 236 to the drive coupling assembly 210, and defines a slot 240 for enclosing a spring 235. The latches 236 automatically rotate/pivot open when they engage corresponding slots 108a of the connecting portion 108 (FIG. 2 ) with the teeth 242. To disengage the drive coupling assembly 210 from the connector portion 108 the latches 236 are pressed down, thereby pivoting the latches 236 and lifting the teeth 242 from the slots 108a.
[0089] FIGS. 9-11 illustrate a drive assembly 250 of the adapter assembly 200. The drive assembly 250 includes a distal housing block 252 having a substantially cylindrical body enclosed within the housing 232. The block 252 includes a plurality of openings 254 therein, which may be threaded, or may include threaded shafts 256 to guide drive screws (not shown) therethrough. The drive screws may be coupled to the corresponding rotatable connector sleeve 218, 220, 222 of adapter assembly 200. The block 252 may also include additional pins 258 to provide structural integrity. The shafts 256 also act as thermal conductors during autoclaving to sterilize the drive screws.
[0090] FIGS. 4 and 12-14 illustrate final assembly of the adapter assembly 200. FIG. 12 shows the drive coupling assembly 210 coupled to the adapter housing 232. A distal housing block 260 (FIG. 13 ) is thereafter coupled to the distal housing block 252 as shown in FIG. 4 . As shown in FIGS. 13 and 14 , the proximal housing 260 also includes a plurality of openings 259 therethrough configured to mate with the shafts 256 and the pin 258, which provide structural support for the housing blocks 252 and 260. Various fasteners 253 (e.g., screws, bolts, etc.) may be used to secure the housing blocks 252 and 260 (FIG. 4 ).
[0091] With reference to FIGS. 3 and 15-19 , the adapter assembly 200 also includes a first retraction assembly 280 disposed within the drive coupling assembly 210 for manually reversing the drive mechanism 330. In particular, the retraction assembly 280 is configured to reverse the clamp and firing strokes of the adapter assembly 200 by retracting an actuation drive screw 332 (FIG. 20 ) coupled to the corresponding rotatable connector sleeve 218 of adapter assembly 200.
[0092] The retraction assembly 280 includes a lock ring 282, a spring-loaded lock bolt 284, and a lock rocker 285. The lock ring 282 is used to manually engage the lock rocker 285 with the drive mechanism 330 such that continual clockwise rotation of the lock ring 282 reverses the drive mechanism 330 as described in further detail below. The lock bolt 284 is a safety mechanism, which prevents accidental engagement of the lock ring 282 with the drive mechanism 330. The lock bolt 284 is spring-loaded and is thereby continually engaged with the lock ring 282 until it is pulled proximally to allow for actuation of the lock ring 282.
[0093] With reference to FIGS. 17-21 , the drive mechanism 330 (FIG. 20 ) of the adapter assembly 200 is shown. The drive mechanism 330 includes the drive screw 332 having a keyed distal end 331 dimensioned and configured to engage the connector sleeve 218 such that rotation thereof is transferred to the drive screw 332. The drive screw 332 also includes a spur gear 334 meshingly engaged with an idler gear 336. The drive mechanism 330 further includes an outer gear 338 having an inner gearing surface 338a and an outer gearing surface 338b. The idler gear 336 is rotationally disposed over one of the shafts 256 and acts as a planetary gear interconnecting the spur gear 334 with the outer gear 338 thereby allowing for transfer of rotational motion from the spur gear 334 to the outer gear 338. The outer gear 338 is freely rotatable unless engaged by the lock ring 282 as described in further below.
[0094] With reference to FIGS. 15 and 21-24 , assembly of the drive mechanism 330 and the retraction assembly 280 is illustrated. As shown in FIGS. 17-19 , the gears 334, 336, 338 are disposed between the distal and proximal housing blocks 252 and 260. Initially, the lock ring 282 is inserted over the distal end of the drive coupling assembly 210, which is then inserted into the proximal housing block 252, as shown in FIG. 23 . The housing 232 (e.g., two halves are mated) is then coupled to the proximal housing block 252. The drive mechanism 330 is then inserted into the proximal housing block 252 as shown in FIG. 21 followed by a spacer 262 (FIG. 22 ).
[0095] With reference to FIG. 22 , the spacer 262 is disposed between the proximal and distal housing blocks 252 and 260 providing for adequate clearance for the gears 334, 336, 338 to rotate as described above. The spacer 262 includes a plurality of cylindrical surface features 263 having openings 263a therein for the passage of the shafts 256 and the pin 258 therethrough. During assembly, the drive mechanism 330 including the gears 334, 336, 338 are disposed over the proximal end of the distal housing block 252 and the spacer 262 is inserted over the gears 334, 336, 338, followed by the distal housing block 260 as shown in FIG. 24 , which are then secured as described above.
[0096] With reference to FIGS. 19 and 25 , the lock bolt 284 includes a proximally-facing post 286 having a spring 288 disposed thereon, which biases the lock bolt 284 in a distal direction. The lock bolt 284 also includes a feature 290 for interfacing with the lock ring 282 as described in further detail below and a grip feature 292 allowing for better grip by the user. The lock bolt 284 further includes opposing, laterally-facing tabs 294a, 294b for slidable coupling of the lock bolt 284 to the drive coupling assembly 210.
[0097] With reference to FIGS. 17, 18, and 26 , the lock rocker 285 includes a pivot pin 310 disposed within an opening 311 pivotally coupling the lock rocker 285 to the drive coupling assembly 210 beneath one of the latches 236. The lock rocker 285 includes a latching feature 312 disposed at a proximal end thereof, a tooth feature 314 disposed distally of the pivot pin 310, and a camming feature 316 disposed at a distal end thereof. The latching feature 312 is configured to engage a slot 260a disposed on the distal housing block 260 as shown in FIGS. 17 and 24 . The tooth feature 314 of the lock rocker 285 is configured to engage the outer gearing surface 338b of the outer gear 338 and the camming feature 316 of the lock rocker 285 is configured to engage the lock ring 282 as shown in FIG. 18 and described in further detail below.
[0098] With reference to FIGS. 16-19 and 27 , the lock ring 282 includes a radial slot 318 configured and dimensioned for engaging the feature 290 of the lock bolt 284. The lock ring 282 also includes first and second camming surfaces 320, 324 for engaging the camming feature 316 of the lock rocker 285. The first camming surface 320 is disposed on an inner circumference of the lock ring 282 and maintains the lock rocker 285 engaged with the distal housing block 260 as shown in FIGS. 17 and 24 . The first camming surface 320 also includes an abutment surface 322 configured and dimensioned for engaging the feature 290 of the lock bolt 284 after the lock ring 282 has been rotated. The second camming slot 324 is disposed on an outer circumference of the lock ring 282 and includes first and second camming portions 324a, 324b. The second camming surface slot 324 is used to guide the lock rocker 285 into engagement with the outer gear 338 as shown in FIG. 18 and described in further detail below.
[0099] FIGS. 28-31 , show operation of the retraction assembly 280. Retraction may be attempted following disconnection of the instrument 100 from the adapter assembly 200, e.g., in the event the instrument 100 should fail or become inoperable during a surgical procedure. FIGS. 17, 19, and 28 show the retraction assembly 280 in its so-called “home” configuration, in which the lock rocker 285 is disengaged from the drive mechanism 330. In the “home” configuration, the lock bolt 284 is biased by the spring 288 to engage the lock ring 282 at the slot 318, as shown in FIGS. 19 and 28 , thereby preventing rotation of the lock ring 282. The lock rocker 285, in turn, is engaged with the slot 260a of the distal housing block 260 as shown in FIGS. 17, 25, and 28 . The lock rocker 285, and in particular the camming feature 316 of the lock rocker 285 is initially engaged with the first camming surface 320 of the lock ring 282.
[0100] FIG. 29 shows the lock bolt 284 being disengaged from the lock ring 282 by pulling the lock bolt 284 proximally as indicated by arrow “A,” thus allowing for rotation of the lock ring 282 in a clockwise direction to begin the retraction process. With reference to FIG. 30 , as the lock ring 282 is initially rotated as indicated by arrow “B,” the camming feature 316 of the lock rocker 285 is still engaged with the first camming surface 320 but travels along the first camming surface 320 and eventually contacts the first camming portion 324a of the second camming surface 320. As the rotation of the lock ring 282 is continued, the camming feature 316 of the lock rocker 285 continues to travel along the second camming portion 324b of the second camming surface 320. Concomitantly therewith, the lock bolt 284 is also reengaged with the lock ring 282 by the spring 288 and rests against the abutment surface 322.
[0101] FIGS. 18 and 31 show completed rotation of the lock ring 282 in which the drive coupling assembly 210 is engaged with the drive mechanism 330, namely, via the lock ring 282 to the outer gear 338. As the drive coupling assembly 210 is manually rotated relative to the drive housing 232, in a clockwise direction as indicated by arrow “B,” along with the lock ring 282, the outer gear 338 is also rotated via the lock rocker 285. This in turn rotates the drive screw 332 via the idler gear 334 and reverses and/or retracts the anvil assembly 306 relative to cartridge assembly 308 of end effector 300 that is connected to the distal end of adapter assembly 200. This prevents counterclockwise rotation of the lock ring 282 and any forward (e.g., clamping and/or firing) movement of the drive screw 332.
[0102] FIGS. 32-34 show another embodiment of a retraction assembly 380, which is substantially similar to the retraction assembly 280 and only the differences therebetween are described. The retraction assembly 380 includes a lock ring 382, a spring-loaded lock bolt 384, and the lock rocker 285, which is unchanged.
[0103] With reference to FIGS. 32 and 33 , the lock bolt 384 includes a proximally-facing post 386 having a spring 388 disposed therein, which biases the lock bolt 384 in a distal direction. The lock bolt 384 also includes a feature (e.g., post) 390 for interfacing with the lock ring 382 as described in further detail below and a grip feature 392 allowing for better grip by the user and also abutting the spring 388.
[0104] With reference to FIGS. 32 and 34 , the lock ring 382 includes a first slot 418 configured and dimensioned for engaging the feature 390 of the lock bolt 384. The lock ring 382 also includes first and second camming surfaces 420, 424 for engaging the camming feature 316 of the lock rocker 285. The first camming surface 320 is disposed on an inner circumference of the lock ring 382 and maintains the lock rocker 285 engaged with the distal housing block 260 as shown in FIG. 17 with respect to the lock ring 282. The lock ring 382 also includes a second slot 420 configured and dimensioned for engaging the feature 390 of the lock bolt 384 after the lock ring 382 has been rotated. The second camming slot 424 is disposed on an outer circumference of the lock ring 382 and includes first and second camming portions 424a, 424b. The second camming surface slot 424 is used to guide the lock rocker 285 into engagement with the outer gear 338 as shown in FIG. 18 with respect to the lock ring 282.
[0105] The lock ring 382 is operated in a similar manner as the lock ring 282 as described above with respect to FIGS. 28-31 . Initially, the lock bolt 384 is pulled proximally out of the first slot 418 and the lock ring 382 is rotated in a clockwise direction. After rotation is completed, the lock rocker 285 is engaged with the drive mechanism 330, namely, the outer gear 338, as described above. The lock bolt 384 is also reengaged with the lock ring 382 by the spring 388 and the feature 390 engages the second slot 422. The drive coupling assembly 210 is then manually rotated relative to the drive housing 232 in a clockwise direction as indicated by arrow “C,” to retract/reverse the drive mechanism 330.
[0106] FIGS. 35 and 36 show another embodiment of a retraction assembly 480, which is substantially similar to the retraction assembly 280 and only the differences therebetween are described. The retraction assembly 480 includes a lock ring 482 and the lock rocker 285, which is unchanged. The lock ring 482 includes a flexible, resilient tab 484 coupled thereto, which performs the function of the lock bolts 284 and 384. The resilient tab 484 includes a feature (e.g., block) 490 for interfacing with first and second openings 518 and 520 defined on the outer surface of the device coupling assembly 210. The resilient tab 484 also includes a grip feature 492 allowing for better grip by the user. The lock ring 482 is substantially similar to the lock rings 282 and 382 described above and includes similar camming surfaces for interfacing with the lock rocker 285.
[0107] The lock ring 482 is operated in a similar manner as the lock rings 282 and 382 as described above with respect to FIGS. 28-34 . Initially, the resilient tab 484 is pulled out of the first opening 518 and the lock ring 482 is rotated in a clockwise direction. After rotation is completed, the lock rocker 285 is engaged with the drive mechanism 330, namely, the outer gear 338 as described above. The resilient tab 484 is also reengaged with the device coupling assembly 210 as the feature 490 engages the second slot 520. The drive coupling assembly 210 is then manually rotated relative to the drive housing 232 in a clockwise direction to retract/reverse the drive mechanism 330.
[0108] FIGS. 37 and 38 show another embodiment of a retraction assembly 580, which is substantially similar to the retraction assembly 280 and only the differences therebetween are described. The retraction assembly 580 includes a lock ring 582 and a pair of tabs 584 coupled to the distal ends of the latches 236. In embodiments, only one of the pair of latches 236 may include the tab 584. The tab 584 is configured and dimensioned to interface with the outer gearing surface 338b of the outer gear 338. The lock ring 582 includes a pair of camming tabs 586 configured and dimensioned to interface with the tabs 584 of the latches 236, thereby engaging the tabs 584 with the outer gear 338.
[0109] During operation, after the instrument 100 is disconnected from the adapter assembly 200, the latches 236 are pressed down, thereby pivoting the latches 236 and engaging the tabs 584 with the outer gear 338. The lock ring 582 is then rotated in a clockwise direction to engage the tabs 586 with the tabs 584 thereby maintaining engagement of the tabs 584 with the outer gear 338. Continual rotation of the lock ring 582 reverses and/or retracts the drive mechanism 330 as described above with respect to FIGS. 28-36 .
[0110] FIGS. 39-47 illustrate a second retraction assembly 680 for retracting and/or reversing an articulation mechanism 630 of the drive mechanism 330. With reference to FIGS. 39 and 40, the articulation mechanism 630 is configured to articulate the tool assembly 304 of end effector 300 about an articulation axis that is transverse to longitudinal axis “X-X” (FIG. 1 ). The articulation mechanism 630 includes an articulation drive screw (not shown) having a keyed distal end dimensioned and configured to engage the connector sleeve 220 such that rotation thereof is transferred to the articulation drive screw. The articulation drive screw also includes a spur gear (not shown) meshingly engaged with an idler gear (not shown). The drive mechanism 630 further includes an outer gear 638 (FIGS. 39 and 40 ). The idler gear is rotationally disposed over one of the shafts 256 and acts as a planetary gear interconnecting the spur gear with the outer gear 638 thereby allowing for transfer of rotational motion form the spur gear to the outer gear 638. The outer gear 638 is freely rotatable unless engaged by the retraction assembly 680 as described in further below.
[0111] With reference to FIGS. 40-43 , the retraction assembly 680 includes a slidable button 682 disposed within a slot 211 of the drive coupling assembly 210. The slidable button 682 includes a proximally-facing latch 684 for engaging the drive coupling assembly 210 when the slidable button 682 is pulled in a proximal direction. The slidable button 682 also includes a pin 686 at a distal end thereof for interfacing with a cam lock 690, as described in further detail below, and a grip feature 688 extending upwardly through the drive coupling assembly 210 allowing for better grip by the user.
[0112] The retraction assembly 680 also includes the cam lock 690 having a cam slot 692 therein for engaging the pin 686 of the slidable button 682. The cam lock 690 is pivotally coupled to the drive coupling assembly 210 via a pivot pin 691. The cam lock 690 also includes a feature 694 for engaging the outer gear 638 of the articulation mechanism 630. As slidable button 684 is pulled in the proximal direction, the pin 686 travels through the cam slot 692 of the cam lock 690, pushing the cam lock 690 in the distal and downward directions thereby engaging the feature 694 with the outer gear 638.
[0113] The retraction assembly 680 also includes a spring-loaded release switch 696, which controls longitudinal movement of the slidable button 682. The release switch 696 moves along an axis transverse to the axis “X-X” (FIG. 1 ) and prevents movement of grip feature 688 unless the release switch 696 is drawn back. When the slidable button 682 is in its so-called “home” (e.g., proximal) configuration and the cam lock 690 is disengaged from the articulation mechanism 630, the release switch 696 is disposed proximally of the grip feature 688. When the slidable button 682 is in its distal configuration and the cam lock 690 is engaged with the articulation mechanism 630, the release switch 696 is disposed distally of the grip feature 688. Thus, to transition from proximal or distal configurations, the release switch 696 is drawn back prior to movement of the grip feature 688 to either engage or disengage the retraction assembly 680 with the articulation mechanism 630.
[0114] With reference to FIGS. 44-47 , operation of the refraction assembly 680 is described. During use, when manual retraction of the articulation mechanism 630 is desired, the adapter assembly 200 is disconnected from the surgical instrument 100. Thereafter the retraction assembly 680 is engaged with the articulation mechanism 630. As shown in FIGS. 42 and 44 , initially the retraction assembly 680 is in its so-called “home” configuration in which the slidable button 682 is in its distal configuration and the cam lock 690 is not engaged with the outer gear 638 of the articulation mechanism 680. As shown in FIGS. 45 and 46 , the release switch 696 is pulled across the slot 211 allowing the slidable button 682 to be pulled proximally. As the slidable button 682 is pulled back the proximally-facing latch 684 engages the drive coupling assembly 210, maintaining the slidable button 682 in the proximal configuration. The cam lock 690 also engages the outer gear 638 of the articulation mechanism 680 as described above and the release switch 696 is slid back into place, preventing distal movement of the slidable button 682.
[0115] It will be understood that various modifications may be made to the embodiments disclosed herein. For example, the instrument 100 need not apply staples but rather may apply two part fasteners as is known in the art. Further, the length of the linear row of staples or fasteners may be modified to meet the requirements of a particular surgical procedure. Thus, the length of a single stroke of the actuation shaft and/or the length of the linear row of staples and/or fasteners within a disposable loading unit may be varied accordingly. Therefore, the above description should not be construed as limiting, but merely as exemplifications of preferred embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended thereto.
Claims
The invention claimed is:
1. A surgical device adapter for coupling an end effector to a handle assembly, the surgical device adapter comprising:
a housing;
a drive mechanism disposed within the housing and couplable to the handle assembly and the end effector, the drive mechanism including a first drive screw configured to be coupled to the end effector to actuate the end effector; and
a drive coupling assembly coupled to the housing and selectively couplable to the handle assembly, the drive coupling assembly including a first drive gear mechanically engaged to the first drive screw and a retraction assembly selectively couplable to the drive mechanism such that rotation of the drive coupling assembly about a longitudinal axis defined by the surgical device adapter and relative to the housing actuates the drive mechanism, wherein the retraction assembly includes:
a lock rocker pivotally coupled within the drive coupling assembly; and
a lock ring rotatable about the longitudinal axis and relative to the drive coupling assembly, wherein rotation of the lock ring actuates the lock rocker to meshingly-engage the lock rocker with the first gear.
2. The surgical device adapter according to claim 1, wherein the retraction assembly further includes:
a spring-loaded lock bolt slidably coupled to the drive coupling assembly and engaged with the lock ring, the lock bolt configured to prevent rotation of the lock ring.
3. The surgical device adapter according to claim 1, wherein the lock ring further includes a flexible, resilient tab configured to engage the drive coupling assembly and prevent rotation of the lock ring.
4. The surgical device adapter according to claim 1, wherein the drive coupling assembly further includes:
at least one latch pivotally coupled therein and configured to engage the handle assembly.
5. The surgical device adapter according to claim 1, wherein the drive mechanism includes a second drive screw coupled to the end effector and configured to articulate the end effector about a pivot axis transverse to the longitudinal axis, the second drive screw mechanically engaged to a second gear disposed within the drive coupling assembly.
6. A surgical device comprising:
an end effector including a first jaw and a second jaw moveable relative to the first jaw;
a handle assembly including at least one motor mechanically coupled to the end effector; and
an adapter assembly removably coupled to a proximal end of the end effector and a distal end of the handle assembly, the adapter assembly including:
a housing;
a drive mechanism disposed within the housing and configured to couple the at least one motor to the end effector; and
a drive coupling assembly including:
a housing coupled to the housing of the adapter assembly and selectively couplable to the handle assembly;
a first drive gear disposed within the housing; and
a retraction assembly coupled to the housing of the drive coupling assembly and selectively couplable to the drive mechanism such that rotation of the drive coupling assembly about a longitudinal axis defined by the adapter assembly and relative to the housing of the adapter assembly actuates the drive mechanism, the retraction assembly including:
a lock rocker pivotally coupled within the drive coupling assembly; and
a lock ring rotatable relative to the drive coupling assembly, wherein rotation of the lock ring engages the lock ring with the lock rocker to meshingly-engage the lock rocker with the first gear.
7. The surgical device according to claim 6, wherein the drive mechanism includes:
a first drive screw coupled to the end effector and configured to actuate the first and second jaws, the first drive screw mechanically engaged to the first gear disposed within the drive coupling assembly; and
a second drive screw coupled to the end effector and configured to articulate the end effector about a pivot axis transverse to the longitudinal axis, the second drive screw mechanically engaged to a second gear disposed within the drive coupling assembly.
8. The surgical device according to claim 6, wherein the retraction assembly further includes:
a spring-loaded lock bolt slidably coupled to the drive coupling assembly and engaged with the lock ring, the lock bolt configured to prevent rotation of the lock ring.
9. The surgical device according to claim 6, wherein the lock ring further includes a flexible, resilient tab configured to engage the drive coupling assembly and prevent rotation of the lock ring.
10. A surgical device adapter for coupling an end effector to a handle assembly, the surgical device adapter comprising:
a housing;
a drive mechanism disposed within the housing and couplable to the handle assembly and the end effector, the drive mechanism including a first drive screw configured to be coupled to the end effector to actuate the end effector; and
a drive coupling assembly coupled to the housing and selectively couplable to the handle assembly, the drive coupling assembly including a first drive gear mechanically engaged to the first drive screw and a retraction assembly selectively couplable to the drive mechanism such that rotation of the drive coupling assembly about a longitudinal axis defined by the surgical device adapter and relative to the housing actuates the drive mechanism, the retraction assembly including:
at least one latch pivotally coupled to the drive coupling assembly and configured to engage the handle assembly, wherein the at least one latch includes a tab coupled to a distal portion thereof, the tab configured to engage the first gear; and
a lock ring rotatable relative to the housing, wherein rotation of the lock ring engages the lock ring with the tab to meshingly-engage the tab with the first gear.
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