Belt shortening device with L-shaped spindle

[0002] The present invention relates generally to belt shortening devices. More specifically, the present invention relates to devices suitable for shortening seat belt webbing. In addition, the present invention relates to the removal of slack from seat belt webbing retaining a baby seat in place on a supporting vehicle seat.

[0003] In the prior art, lengths of belt material or webbing are commonly used to retain a structure in place. For example, belts are frequently used to retain stacked articles in place on a pallet. Belts are also commonly employed in vehicles to secure an occupant for safety purposes. In particular, these existing belts in vehicles are typically used to secure a baby's seat to the supporting vehicle seat. While belts are effective for security, they suffer from the disadvantage of having unwanted slack which decreases the effectiveness of the belt's ability to secure and retain the baby seat in place.

[0004] To address the inherent problem of slack in belts for retaining, there have been many attempts in the prior art to reduce or eliminate such slack. For example, ratcheted spindles have been available in the prior art. The belt webbing is typically routed around the spindle and wound about the spindle with the assistance of the ratchet. Further, the ratchet provides additional leverage and locking to enable the belt to be tightened and released as desired. Also, spring clips have been provided to grip excess portions of the belt to thereby shorten the belt.

[0005] However, these prior art devices suffer from many disadvantages which makes them undesirable to use. These prior art devices commonly require that a free end of the belt be routed through the device to enable winding of the belt by the device to effectuate shortening. Other devices permanently incorporate the ratchet take-up mechanism directly on the belt itself. Such devices are commonly used on special belt systems for retaining articles on a pallet. As can be understood, the foregoing prior art devices are unsuitable for shortening vehicle seat belts because vehicle seat belts are not capable of being routed onto a ratchet take-up mechanism due to the presence of bulky buckles, both male and female, present on the free ends of the belts.

[0006] In view of the foregoing, there is a demand for a belt shortening device which is well suited for shortening vehicle seat belts. There is a particular demand for a belt shortening device that can be easily retrofitted to an installed baby seat without disengaging the existing belt connection. In addition, there is a demand for a belt shortening device that is compact, inexpensive and easy to operate.

[0007] The present invention preserves the advantages of prior art belt shortening devices. In addition, it provides new advantages not found in currently available devices and overcomes many disadvantages of such currently available devices.

[0008] The invention is generally directed to a novel and unique belt shortening device that can be easily mounted to an existing belt without detaching the belt from its existing connection. The device includes an L-shaped spindle rotatably mounted in a frame and connected to a crank arm to facilitate winding. The spindle includes a longitudinally extending slot which communicates with a laterally extending entry opening. A spring-biased closure is connected to the spindle to close the laterally extending entry opening during winding. When the closure is open and access to the laterally extending entry opening is available, a seat belt is insertable, edge first, into the longitudinally extending slot via the laterally extending entry opening. Once the vehicle seat belt is positioned within the longitudinally extending slot, the closure closes the entry opening and the crank arm is manipulated to, thereby, rotate the spindle to wind the belt therearound. The laterally extending entry opening is positioned at one end of the length of the longitudinally extending slot. A securing tab or pair of tabs may also be employed to secure the belt during winding and unwinding.

[0009] For installation and operation, the belt to be shortening is slid, edge first, into the device of the present invention. Such a belt, for example, may be employed to secure a baby seat to a vehicle seat. The belt webbing is inserted into the slot of the device with the entire width of the belt residing completely within the spindle of the device. The belt is threaded into the rotating spindle via the entry opening after first exposing the entry opening by opening the spring-biased closure. The belt is also routed below the guide tabs which are spaced apart from the spindle. The handle of the ratchet mechanism is repeatedly pulled by the user to rotate the spindle and, thus, rotate the spindle which contains the belt. Rotation of the spindle causes the belt to be wound about the spindle reducing the overall length of the belt.

[0010] When the desired tension is achieved, pulling of the handle is stopped thus ceasing any further winding of the belt webbing. The ratchet mechanism is provided with a suitable locking device to prevent unwinding of the belt from the spindle. In addition, a lock release is provided to permit the belt to be unwound from the spindle, such as for when removal of the device from the belt is desired. Once the belt is completely unwound, the device can be easily removed.

[0011] It is therefore an object of the present invention to provide a device that can shorten a belt such as a seat belt.

[0012] It is an object of the present invention to provide a belt shortening device suitable for shortening a seat belt retaining a baby seat in place on a vehicle seat.

[0013] It is a further object of the present invention to provide a belt shortening device that can be easily retrofitted to an existing belt web without detaching the belt from its existing connection.

[0014] Another object of the present invention is to provide a belt shortening device that requires no additional belt webbing or additional buckles.

[0015] It is a further object of the present invention to provide a belt shortening device that is inexpensive to manufacture.

[0016] Another object of present invention is to provide a belt shortening device that is easy to install and operate.

[0017] Another object of the present invention is to provide a belt shortening device that is compact and portable.

[0018] A further object of the present invention is to provide a belt shortening device that can remove undesirable and unsafe slack present in a seat belt that is securing a baby seat to a vehicle seat.

[0019] The novel features which are characteristic of the present invention are set forth in the appended claims. However, the invention's preferred embodiments, together with further objects and attendant advantages, will be best understood by reference to the following detailed description taken in connection with the accompanying drawings in which:

[0020] FIG. 1 is a perspective view of the belt shortening device of the present invention with spindle closure in an open position;

[0021] FIG. 2 is a perspective view of the belt shortening device of FIG. 1 with a belt residing therein and the spindle closure in a closed position;

[0022] FIG. 3 is a cross-sectional view through the line 3—3 of FIG. 1;

[0023] FIG. 4 is a cross-sectional view through the line 4—4 of FIG. 2;

[0024] FIG. 5 is a perspective view of the belt shortening device of FIG. 1 in the process of winding a belt for shortening the length thereof;

[0025] FIG. 6 is a cross-sectional view of the spindle shown in FIG. 5 with the belt being wrapped therearound;

[0026] FIG. 7 is a perspective view of the preferred ratchet mechanism for controlling the rotation of the spindle showing an first alternative spindle with no closure;

[0027] FIG. 8 is a cross-sectional view of an alternative embodiment of the present invention with second alternative spindle closure configuration;

[0028] FIG. 9 is a perspective view of an alternative embodiment of the present invention with first alternative spindle configuration and first guide tab configuration with a single guide tab; and

[0029] FIG. 10 is a perspective view of a further alternative embodiment of the present invention with first alternative spindle configuration and second guide tab configuration with a pair of guide tabs.

[0030] Referring first to FIG. 1, a perspective view of the belt shortening device 10 of the present invention is shown. The device 10 includes a frame 12 which supports a rotatable spindle 14. Rotation of the spindle 14 is controlled by a crank handle 16. Details of the control of the rotation of the spindle 14 will be discussed in more detail below. The spindle 14 is of a substantially L-shaped configuration with a retractable closure 18. Preferably, the closure 18 is spring-biased into a closed position as shown in FIGS. 3 and 4. Referring to FIGS. 1 and 3, the closure 18 is a spring-biased member which may be a cap affixed to the free end of the top portion of the spindle 14. The closure 18 is opened, against the forces of a spring 20, to thereby allow access to an entry opening 22 which, in turn, provides access to a longitudinal slot 24 which houses a belt 26 for shortening. It is also possible to omit the spring-biasing of the closure 18, however, this would require the user to manually return the closure 18 to a closed position.

[0031] When the closure 18 is in an open position, a belt 26 may be inserted, edge first, into the longitudinal slot 24 via the entry opening 22. As shown in FIG. 2, the closure 18 is then released to secure the belt 26 within the spindle 14. When the closure 18 is in a closed position, it preferably rests in a seat 28 to add integrity to the spindle 14. Also, for further protection of the belt 26 during the winding process, an additional guide tab or guide tabs 30 may be provided. In FIG. 2, by way of example, a pair of guide tabs 30, which emanate from opposing sides of the frame 12, are provided. In this embodiment, a central opening 32 is provided to allow access by the belt 26 by folding the belt 26 in half and inserting the belt 26, edges first, therein. These guide tabs 30 are located above the floor 34 of the frame 12 a selected distance to form and define a longitudinal guide track 36. The free ends 30aof the guide tabs 30 are separated from one another to define the lateral entry opening 32 to access the guide track 36 between the tabs 30 and the floor 34 of the frame 12. Essentially, the spindle 14 forms an “L-slot” that is rotatable to wind up the belt 26 residing therein. As shown in FIG. 2, a “T-slot” is provided that is stationery to serve as a guide to control and secure the belt 26 during winding. In FIG. 2, the belt 26 is routed into the “L-slot” of spindle 14 and the stationery “T-slot”. Once the belt 26 is loaded, as in FIG. 2, it is in preparation for winding.

[0032] Turning now to FIG. 5, winding and shortening of the belt 26 is shown. Cranking of the handle 16 in an upward direction, as shown by the arrow in dotted lines, causes the spindle 14 (now hidden by wound belt) to rotate thus winding the belt 26 therearound. As shown by the indicated arrows, the belt 26 is shortened and wound about the spindle 14. As the belt 26 is wound about the spindle 14, the belt has a tendency to lift out of the frame 12. With the additional guide tabs 30 of the present invention, the belt 26 is maintained within the frame 12 and proximal to the floor 34 of the frame 12. As a result, during winding, the belt 26 is maintained in control at all times to effectively avoid derailing and jamming of the device 10. FIG. 6 illustrates a cross-sectional view of the belt 26 being wound about the spindle 14.

[0033] Referring now to FIG. 7, the ratchet mechanism 38 for controlling the rotation of the spindle 14 is shown in detail. In particular, the spindle 14 is affixed directly to a primary gear 40 with teeth 42 thereon. When handle 16 is moved in the direction of the indicated arrow, a rotation pawl 44, which is spring-biased in a downward direction toward the primary gear 40, engages a tooth 42 of the primary gear 40 to cause the primary gear 40, thus the spindle 14, to rotate in the direction indicated by the arrow about the spindle 14. As a result, the belt 26 is wound a partial turn about the spindle 14. For additional winding, the handle 16 is moved downward in a direction opposite to the direction of the indicated arrow in preparation for additional winding. When the handle 16 is moved downward, the rotation pawl 44 rides over the teeth 42 of the primary gear 40. To prevent unwinding of the spindle, a lock pawl 46, which is spring-biased toward the primary gear 40, is provided which engages with a tooth 42 of the primary gear 40 to prevent rotation of the spindle 14 in an unwinding direction. For a subsequent rotation, the rotation pawl 44 engages another tooth on the primary gear 40 and the lock pawl 46 rides over the teeth 42 until the stroke of the handle 16 is completed. The handle 16 is cranked until the desired winding and shortening of belt 26 is achieved. While this ratchet mechanism 38 is preferred for the present invention, other ratchet mechanisms may be employed. By way of example and for clarity, the belt 26 is not shown and a spindle is illustrated in FIG. 7 that does not include a spring-biased closure 18.

[0034] Referring now to FIG. 8, an alternative embodiment 100 of the present invention is shown. In particular, an alternative spring-biased closure 102 configuration is shown to include a hinge mounted door 104 which is spring-biased into a closed position against the spindle 106 by a coil spring 108.

[0035] Turning now to FIGS. 9 and 10, two alternative configurations 200 and 300 of the belt shortening device of the present invention is shown. In these embodiments 200 and 300, a spring-biased closure is omitted and, as a result, the lateral entry opening remains open at all times. This open L-slot spindle configuration is physically operable but is dangerous and subject to jamming because it allows for the belt 26 to slide out of the longitudinal slot through the entry opening. To further control the positioning of the belt within the device of the present invention, at least one guide tab is preferred.

[0036] In FIG. 9, alternative embodiment 200 includes a single guide tab 202 emanating from one side of the frame to create an entry opening 204 on the opposing side of the device 200. Preferably, the single guide tab 202 emanates from the side of the frame 206 so as to form a guide track entry opening 204 that is cross-corner to the lateral entry opening 208 in the spindle 210. Such cross-corner configuration will make it virtually impossible for the belt 212 to be ejected during use of the device 200. Of course, it is possible to have the guide tab 202 emanate in the opposite direction where the guide track opening 204 is on the same side of the device 200 as the lateral entry opening 208 in the spindle 210. In FIG. 10, a further embodiment 300 is shown where the device 300 includes an L-shaped spindle 302 without a spring-biased closure and including a pair of guide tabs 304. The guide tabs 304 operate as described above in connection with FIGS. 1 and 2 to control belt 306.

[0037] It would be appreciated by those skilled in the art that various changes and modifications can be made to the illustrated embodiments without departing from the spirit of the present invention. All such modifications and changes are intended to be covered by the appended claims.