Lumbar and bolster support for second row seat

This application claims priority of U.S. Provisional Application No. 60/913,744 filed Apr. 24, 2007.

1. Field of the Invention

The present invention relates to the field of lumbar support systems, especially as such systems are used in automotive seats and chair back rests.

2. Related Art

Lumbar support systems have become a popular feature for use in automotive seats, office chairs, beds, lounge chairs and various other furniture and equipment used for sitting or reclining. Numerous and varied designs of lumbar support systems have been developed and produced.

The present invention is a lumbar and bolster support for a seat, especially for an automotive second row seat or a chair back rest.

Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purpose of illustration only and are not intended to limit the scope of the invention.

The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:

FIG. 1 illustrates a front perspective view of an embodiment of the present invention.

FIG. 2 illustrates a bottom view the embodiment of FIG. 1 .

FIG. 3 illustrates a back perspective view of the embodiment of FIG. 1 .

FIG. 4 illustrates a front view of the embodiment of FIG. 1 .

The following description of the preferred embodiment(s) of the present invention is merely exemplary in nature and is in no way intended to limit the present invention, its application, or its uses.

As shown in FIGS. 1-4 an apparatus 10 to provide a lumbar and bolster support in a seat back is provided comprising a lumbar support basket 20 , two bolster paddles 30 , 31 , a suspension wire 40 , an actuator 50 , a first, second and third bowden cable wire assemblies 52 , 54 . 56 , a center bracket assembly 60 , four spring and spring tube assemblies 62 , 63 , 64 , 65 , four pivot plates 70 , 71 , 72 , 73 , two hinge wires 74 , 75 , two pivot wires 76 , 77 , two trim wires 80 , 81 , two bolster wires 78 , 79 and two slider assemblies 90 , 91 . The spring and spring tube assemblies 62 , 63 , the pivot plates 70 , 71 , the hinge wire 74 , the pivot wire 76 , the bolster wire 78 , and the slider assembly 90 are collectively referred to as a first bolster adjustment mechanism, and the spring and spring tube assemblies 64 , 65 , the pivot plates 72 , 73 , the hinge wire 75 , the pivot wire 77 , the bolster wire 79 , and the slider assembly 91 are collectively referred to as a second bolster adjustment mechanism.

According to the depicted embodiment an upper portion of the suspension wire 40 is attached by clips 42 , 43 to a seat back (not shown) and a lower portion is hingedly attached to the lumbar support basket 20 as best seen in FIG. 1 . Although the suspension wire 40 is depicted as a generally U-shaped wire, it need not be limited to a U-shaped wire. The lumbar support basket 20 is preferably designed such that it is naturally biased in a retracted position, for example by making it at least in part out of elastic material. The lumbar support basket 20 preferably has a number of through-holes as depicted. The sides of the lumbar support basket 20 are hingedly attached to the two pivot wires 76 , 77 , respectively, as best seen in FIG. 2 .

The pivot wires 76 ; 77 are in turn hingedly connected to the four pivot plates 70 , 71 ; 72 , 73 , two on each side. Two pivot plates 70 , 71 ; 72 , 73 are connected to each bolster wire 78 ; 79 on its respective side. The pivot plates 70 , 71 ; 72 , 73 connect to the bolster wire 78 ; 79 preferably at a middle portion of the bolster wire 78 ; 79 on its respective side. Outer portions of the two bolster wires 78 , 79 are fixed to the two bolster paddles 30 , 31 , respectively. Inner portions of the two bolster wires 78 , 79 are hingedly attached to the two slider assemblies 90 , 91 , respectively. The two slider assemblies 90 , 91 are slidable with respect to the center bracket assembly 60 . The two bolster paddles 30 , 31 are fixed to the two trim wires 80 , 81 , respectively. The two trim wires 80 , 81 are slideably connected to two clips 82 , 83 , which are attached to a seat frame (not shown). The two pivot plates 70 , 71 ; 72 , 73 are also hingedly connected to the hinge wire 74 ; 75 , on its respective side. The two hinge wires 74 , 75 are both hingedly connected to opposite sides of the center bracket assembly 60 as best seen in FIG. 2 . Accordingly, when the slider assemblies 90 , 91 slide with respect to the center bracket assembly 60 , the two bolster paddles 30 , 31 are moved between a first position and a second position.

Preferably, two spring assemblies 62 , 63 ; 64 , 65 on each side of the center bracket assembly 60 are attached such that one end of each spring is fixed with respect to a portion of the hinge wire 74 , 75 , and the other end is fixed with respect to a portion of the respective slider assembly 90 , 91 as best seen in FIG. 2 , thereby biasing the two bolster paddles 30 , 31 in the first position.

The actuator 50 is attached to the suspension wire 40 . A first end of the first bowden cable 52 is operatively connected to the actuator 50 . The second end of the conduit portion of the first bowden cable assembly 52 is fixed with respect to a first pivot wire 77 . The second end of the wire portion 53 of the first bowden cable assembly 52 is fixed with respect to a second pivot wire 76 as best seen in FIGS. 2 and 4 . A portion of the wire 53 of the first bowden cable assembly 52 runs through a channel in the lumbar support basket 20 such that when tension is applied to the wire 53 , the lumbar support basket 20 is moved to an extended position. Preferably, when such tension is removed the lumbar support basket 20 is moved back to the retracted position due to its natural bias.

The conduit portions of the second and third bowden cable assemblies 54 , 56 are fixed with respect to the center bracket assembly 60 . The wire portions of the second and third bowden cable assemblies 54 , 56 are attached to the slider assemblies 90 , 91 , respectively. Accordingly, when tension is applied to the wire portions of the second and third bowden cable assemblies 54 , 56 , the slider assemblies 90 , 91 are moved slidingly with respect to the center bracket assembly 60 such that the two bolster paddles 30 , 31 are moved from the first position to the second position.

As various modifications could be made to the exemplary embodiments, as described above with respect to the corresponding illustrations, without departing from the scope of the present invention, it is intended that all matter contained in the foregoing description and shown in the accompanying drawings shall be interpreted as illustrative rather than limiting. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims appended hereto and their equivalents.