Mounting apparatus for expansion cards

[0001] 1. Field of the Invention

[0002] The present invention relates to mounting apparatuses, and more particular to a mounting apparatus for readily and securely mounting expansion cards in a computer enclosure.

[0003] 2. Description of the Related Art

[0004] Generally, in the enclosure of a typical personal computer, there are a lot of expansion cards electrically connected to a motherboard to provide specialized functions. It is required that the expansion cards be reliably retained within the computer enclosure to prevent disengagement from the motherboard when the computer is subjected to shock and vibration during delivery and use thereof.

[0005] U.S. Pat. No. 5,317,483 discloses a mounting apparatus for mounting expansion cards to a chassis. The mounting apparatus includes a locking bar having one end pivotally mounted to a support plate of the chassis. After the locking bar is pivoted to a position in which slot covers of the expansion cards are sandwiched between the locking bar and the support plate, the other end of the locking bar is fastened to the support plate with a screw. The expansion cards are thus secured to the chassis.

[0006] U.S. Pat. No. 5,936,835 discloses another expansion cards mounting apparatus. The mounting apparatus has a plurality of spring tabs and a mounting portion. After the mounting apparatus is disposed in a position in which the spring tabs press respectively corresponding slot covers of expansion cards, the mounting portion is screwed to a chassis. The expansion cards are thus secured to the chassis.

[0007] Both of the above-mentioned mounting apparatus can assemble a plurality of expansion cards synchronously. However, when installing or removing the expansion cards, using the screw fasteners is laborious and time-consuming. In addition, a tool such as a screwdriver or wrench is usually required.

[0008] Thus an improved mounting apparatus for expansion cards which overcomes the above-mentioned drawbacks is desired.

[0009] Accordingly, an object of the present invention is to provide a mounting apparatus for readily and efficiently installing expansion cards to and removing expansion cards from equipment such as a chassis of a computer.

[0010] To achieve the aforementioned object, a mounting apparatus of the preferred embodiment of the present invention for securing a plurality of expansion cards with cover plates to a computer comprises a chassis, a bracket and a mounting member. The chassis comprises a rear panel. The rear panel has a mounting frame. The bracket is located on a top portion of the rear panel and includes a pair of guiding portions. A locating aperture is defined in each guiding portion. The mounting member slidably received in the guiding portions of the bracket comprises a main portion and a pair of operating members. The main portion includes a base and first and second sidewalls extending upwardly from two opposite edges of the base. A pair of mounting holes is defined in a top portion of the second sidewall thereof. The operating members pivotally secured between the first sidewall and the second sidewall. Each operating member has a protrusion corresponding to the mounting hole of the second sidewall and a fastening portion corresponding to the locating aperture of the bracket. The cover plates are attached to the mounting frame of the rear panel of the chassis, the mounting member is driven downwardly toward the cover plates until the base of the mounting member presses the cover plates, and the operating members are rotated until the fastening portions engage in corresponding locating apertures of the guiding portions of the bracket, the protrusions of the operating members engage in corresponding mounting holes of the main portion of the mounting member, the expansion cards are thereby mounted to the chassis.

[0011] Other objects, advantages and novel features of the present invention will be drawn from the following detailed description of the preferred embodiment of the present invention with attached drawings, in which:

[0018] Referring to FIG. 1, a mounting apparatus in accordance with the preferred embodiment of the present invention is used to secure a lot of expansion cards 30 to a computer. The mounting apparatus comprises a chassis 10, a bracket 40 and a mounting member 50. The expansion cards 30 are mounted to a lot of cover plates 34.

[0019] The chassis 10 comprises a bottom (not visible) and a front panel 12, a rear panel 14, two side panels 18 extending perpendicularly from four edges of the bottom. The rear panel 14 is inwardly stamped to form two hooks 142 at a top portion. Two holes 144 are defined in the rear panel 14 at a bottom portion of the hooks 142 thereof. An L-shaped mounting frame 145 is mounted at a bottom portion of the rear panel 14. The mounting frame 145 defines a plurality of expansion slots 148 and forms a plurality of beams 146 alternating with the expansion slots 148. A bent portion 147 is perpendicularly and backwardly formed from one common end of the beams 146. A motherboard 20 mounted on the bottom of the chassis 10 has a plurality of expansion sockets 22 parallel to the side panels 18, corresponding to the expansion slots 148 of the rear panel 14.

[0020] Each expansion card 30 comprises a connector portion 32 extending downwardly from a bottom, corresponding to the expansion socket 22 of the motherboard 20. Each cover plates 34 comprises a mounting plate 36 engaged with the expansion card 30 and a mounting tab 38 bending perpendicularly from a top portion thereof.

[0021] Referring also to FIG. 2, the bracket 40 comprises a main plate 42 and a pair of U-shaped guiding portions 44 bending severally from two opposite sides of the main plate 42. The main plate 42 defines a pair of apertures 422 corresponding to the hooks 142 of the rear panel 14, and a pair of through holes 424 corresponding to the holes 144 of the rear panel 14. A retaining portion 426 is inwardly stamped in a middle of the main plate 42. Two guiding slots 428 are defined in the main body 42 at both sides of the retaining portion 426 thereof. A U-shaped flange 429 is formed from edges of each guiding slot 428. A connecting portion 45 is deformed between the main plate 42 and the guiding portion 44. The guiding portion 44 is outwardly stamped to form a resilient tab 442 at a top portion. The resilient tab 442 has a locating portion 444 extending inwardly at a distal end thereof. A locating aperture 446 is defined in each guiding portion 44 at a bottom portion thereof.

[0022] Referring also to FIGS. 3 and 4, the mounting member 50 comprises a main body 52 and a pair of operating members 59 pivotally mounted to the main body 52. The main body 52 comprises a base 58 and a first sidewall 53, a second sidewall 54, a pair of third sidewalls 56 perpendicularly and upwardly bent from four edges of the base 58. The base 58 comprises a plurality of resilient tongues 582, corresponding to the expansion slots 148 of the mounting frame 145. The first sidewall 53 comprises an operation portion 532 extending outwardly from a top portion, and a plurality of tabs 534 extending downwardly from a bottom thereof, corresponding to the expansion slots 148 of the mounting frame 145. The second sidewall 54 comprises a pair of guiding posts 542 corresponding to the guiding slots 428 of the bracket 40. An L-shaped hitching tab 544 is formed between the guiding posts 542, corresponding to the retaining portion 426 of the bracket 40. A pair of supporting portions 545 is formed on the second sidewall 54 respectively between guiding post 542 and the hitching tab 544. The height of the supporting portions 545 is approximately equal to that of the hitching tab 544 thereof. The second sidewall 54 defines two mounting holes 546 at a top portion therein between the guiding posts 542 and corresponding supporting portions 545. A pair of fixing holes 548 is defined through the first sidewall 53 and the second sidewall 54. Each third sidewall 56 defines a through aperture 562 at a bottom portion corresponding to the locating aperture 446 of the bracket 40 and a locating hole 564 at a top portion corresponding to the locating portion 444 of the tab 442 of the bracket 40. Each operating member 59 comprises an arm 592 and an operating tab 594 extending perpendicularly from a top portion end of the arm 592. The arm 592 forms a protrusion 596 at a top portion corresponding to the mounting hole 546 of the second sidewall 54 of the main body 52. A fixing hole 597 is defined in the arm 592 at a bottom portion corresponding to the fixing hole 548 of the first sidewall 53 and second sidewall 54, for securing pivotally corresponding operating member 59 to the main body 52 by a shaft 60 inserting therein. A fastening portion 598 extends from a distal end of the arm 592, corresponding to the through aperture 562 of the main body 52 and the locating aperture 446 of the bracket 40.

[0023] Referring also to FIG. 5, in assembly, the hooks 142 of the rear panel 14 engage in corresponding apertures 422. The bracket 40 is secured to the rear panel 14 by two fasteners (not shown) such as rivets aligning the holes 424 of the bracket 40 and corresponding holes 144 of the rear panel 14. The mounting member 50 is slidably mounted on the bracket 40 by two third sidewalls 56 received in corresponding guiding portions 44 of the bracket 40. The guiding posts 542 of the mounting member 50 are received in corresponding guiding slots 428 and sliding therein.

[0024] When assembling the expansion cards 30 to the mounting apparatus, each locating portion 444 of the bracket 40 is located in corresponding locating hole 564 of the mounting member 50. The connector portions 32 of the expansion cards 30 are plugged into corresponding expansion sockets 22 of the motherboard 20. The cover plates 34 attach to the mounting frame 145 and cover the expansion slots 148. The mounting member 50 slides downwardly along the guiding portion 44 of the bracket 40 by pushing the operation portion 532 of the main body 52. The main body 52 slides on the bracket 40, till the resilient tongues 582 of the main body 52 contact the mounting tabs 38 of the cover plates 34. Meanwhile, the hitching tab 544 of the mounting member 50 hooks the retaining portion 426 of the bracket 40. A top portion edge of the through aperture 562 of the third sidewalls 56 is higher than a top portion edge of corresponding locating aperture 446 of the guiding portion 44 of the bracket 40. Both of the operating members 59 are downwardly rotated around the shafts 60. The fastening portion 598 of the operating member 59 extends through corresponding through aperture 562 and locating aperture 446. The main body 52 further slides downwardly to push the cover plates 34 to the mounting frame 145, till the protrusions 596 of the operating members 59 are received in corresponding mounting holes 546 of the main body 52. Thus, the expansion cards 30 are secured to the chassis 10.

[0025] Referring to the FIG. 6, when disassembling the expansion cards 30 from the chassis 10, the protrusions 596 of the operating members 59 are released from corresponding mounting holes 546 of the main body 52. The operating members 59 are upwardly rotated around corresponding shafts 60. The fastening portions 598 are released from the upper edges of the locating slots 446 of the guiding portions 44. The main body 52 slides upwardly by pushing the operating portion 532. The resilient tongues 582 release the mounting plates 38 of the cover plates 34. The locating portions 444 of the bracket 40 insert corresponding locating holes 564 of the main body 52. Thus, the expansion cards 30 together with the cover plates 34 can be taken out from the chassis 10.

[0026] Alternatively, corresponding structures of the bracket 40 can also be directly formed on the rear panel 14 of the chassis 10.

[0027] It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.