JPH0668549U - Lumber support device - Google Patents

Abstract

(57) [Abstract] [Purpose] By simplifying the configuration of the lumbar support device, the number of parts is reduced, the assembly cost is reduced, and the weight is reduced. [Structure] A support rod 2 of a support adjusting arm 21 is integrally formed on a support panel 30 so as to be cut and raised at predetermined intervals.
Three elastic tongues 32a to 32c for elastically sandwiching 3 are provided, while the support rod 23 is arranged to regulate the rotation of the support panel 30 with respect to the support rod 23 and the positional deviation in both directions.
One of the two locations between the elastic tongues 32a to 32c in FIG.
And a downward bending stopper 25 is provided by bending the other side downward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lumbar support device that adjusts the support feeling of the lumbar region according to the occupant's preference by moving the part of the backrest of a vehicle seat, etc., where the occupant's lumbar vertebrae abuts, back and forth.

[0002]

[Prior art]

 Conventionally, as this type of lumbar support device, there is one as shown in FIG. That is, the support adjustment arm 1 is pivotally supported on both sides (not shown) of the backrest frame so as to be swingable in the front-rear direction, and the back surface of the backrest pad material (not shown) is supported on the support adjustment arm 1. A support panel 2 facing the front is attached via a hinge bracket 3. More specifically, the support adjustment arm 1 is sandwiched between the support panel 2 and the hinge bracket 3, and when the support panel 2 can rotate with respect to the support adjustment arm 1, a plurality of hinge brackets 3 are attached to the support panel 2. The spots are welded together.

Further, the rotation of the support panel 2 with respect to the support adjustment arm 1 needs to be restricted by leaving only play, and as a method therefor, a part of the support adjustment arm 1 that appears from the notch hole of the hinge bracket 3 A stopper bracket 4 for restricting rotation is fixed by spot welding.

[0004]

[Problems to be solved by the device]

 However, in such a conventional lumbar support device, in order to attach the support panel 2 to the support adjustment arm 1, it is necessary to weld a hinge bracket 3 separately, and in order to prevent the support panel 2 from rotating, a stopper bracket 3 is required. Since it is necessary to weld No. 4 as well, there are problems that the number of parts is large, the assembly cost is high, and the weight is increased.

The present invention has been made in view of such conventional problems, and reduces the number of parts and simplifies the assembly cost by attaching a panel to an arm and simplifying the structure for preventing panel rotation. The purpose of the present invention is to provide a lumbar support device that can reduce weight and realize weight reduction.

[0006]

[Means for Solving the Problems]

 The gist of achieving this object is to move the part of the backrest (10) that is in contact with the lumbar vertebrae of the seated person back and forth to adjust the lumbar support to adjust the lumbar support feeling according to the seated person's preference. In the device (20), swing center axes (22) are pivoted substantially horizontally on both sides of the frame (11) of the backrest (10), and the swing center axes (22) are bent from the swing center axes (22). A support adjustment arm (21) having a support rod (23) connecting between the free ends (22a) swinging in the front-back direction, and a lumbar vertebra contact portion () of the pad material (50) of the backrest (10). And a support panel (30) that faces the back surface of the support arm (51) and is mounted on the support rod (23) of the support arm and pushed forward. The support panel (30) is cut and raised at predetermined intervals. Integrally molded, the support A plurality of elastic tongues (32a to 32c) for elastically sandwiching the support rod (23) of the adjustment arm (21) are provided, while rotation of the support panel (30) with respect to the support rod (23) and both side directions. In order to regulate the position deviation of the support rod (23), one of any two of the locations between the elastic tongues (32a to 32c) of the support rod (23) is bent upward to bend upward. The lumbar support device (20) is characterized in that the stopper (24) is provided, and the other is bent downward to provide a downward curving stopper (25).

[0007]

[Action]

 The support panel (30) constituting the lumbar support device (20) is formed integrally with the support panel (30) so as to be cut and raised at predetermined intervals and elastically holds the support rod (23) of the support adjustment arm (21) elastically. Plural pieces (32a to 32c) are provided.

Accordingly, when the support panel (30) is attached to the support adjustment arm (21), it is not necessary to perform a welding operation or the like through another member, and only the plurality of elastic tongues of the support panel (30) are attached. It suffices that the support rod (23) is sandwiched between the pieces (32a to 32c), and it can be attached by so-called one-touch.

On the other hand, in the support adjusting arm (21), one of two places between the elastic tongues (32a to 32c) of the support rod (23) is curved upward. The upward bending stopper (24) is provided, and the other is bent downward, and the downward bending stopper (25) is provided.

As a result, when the upper end edge side of the support panel (30) tries to rotate rearward with respect to the support rod (23), the upward bending stopper (24) abuts on the upper rear surface of the panel, When the lower edge of the panel tries to rotate rearward, the downward bending stopper (25) contacts the lower side of the rear surface of the panel, so that the support panel (30) is restricted from rotating in any case.

Further, the upward bending stopper (24) or the downward bending stopper (25) that bends so as to project above or below the support rod (23) is provided with a support panel () located beside each stopper. Since the elastic tongue pieces (32a to 32c) of 30) are brought into contact with each other, the positional deviation of the support panel (30) with respect to the support rod (23) in both lateral directions is also restricted.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment of the present invention. As shown in FIG. 1, the lumbar support device 20 is provided on the back of a general seat typified by a vehicle seat or the like, and this embodiment will be described on the assumption that it is provided on the vehicle seat.

The lumbar support device 20 is a device that adjusts the support feeling of the lumbar region according to the preference of the seated person by moving the backrest, that is, the portion 51 of the seatback 10 where the vicinity of the lumbar vertebra of the seated person abuts, back and forth. The back frame 11 that constitutes the seat back 10 is provided.

As shown in FIGS. 1 and 6, the back frame 11 includes side frames 12a and 12b on both sides, an inverted U-shaped upper frame 13 connecting upper ends of the side frames 12a and 12b, and both side frames. Lower frame 14 connecting the lower ends of 12a and 12b. A pair of holder members 15, 15 for attaching a headrest (not shown) are fixed to the upper frame 13.

A reinforcing panel 17 extending substantially horizontally is installed between the side frames 12a and 12b, and cushioning S spring members 16a and 16b are stretched below the reinforcing panel 17. . The pad material 50 is shaped by the back frame 11 as described above, and the lumbar support device 20 is provided on both side frames 12a and 12b of the back frame 11.

That is, at the lower end sides of both side frames 12a, 12b, a support adjusting arm 21 having swing center shafts 22, 22 at both ends is pivotally supported so as to be substantially horizontal. The support adjusting arm 21 is provided with a support rod 23 that linearly connects between the two floating ends 22a, 22a that are bent from the swing center shafts 22, 22 at both ends and swing in the front-back direction. A support panel 30 is attached to 23.

As shown in FIG. 2, while the support panel 30 is attached to the support rod 23 of the support adjustment arm 21, the support panel 30 is pushed forward as the support rod 23 swings, and the lumbar contact of the pad material 50 is performed. It is a member for projecting and retracting the site 51 forward, and is arranged so as to face the back surface side 52 of the lumbar spine contact site 51.

As shown in FIGS. 3 to 5, the support panel 30 is made of hard synthetic resin in the shape of an elliptical plate, but may be made of a thin iron plate or the like. More specifically, a reinforcing flange 31 is formed on the peripheral edge of the support panel 30.

Further, three elastic tongues 32a, 32b, 32c integrally formed so as to cut and raise the panel at equal intervals are provided at substantially the center of the panel and both sides thereof. The elastic tongues 32a, 32b, 32c are curved along the outer periphery of the support rod 23, and elastically sandwich the support rod 23 of the support adjustment arm 21. The support panel 30 can be mounted on the support rod 23 in a one-touch manner by the elastic tongues 32a to 32c.

On the other hand, the support adjusting arm 21 is basically formed by bending a round bar material into a crank shape, but each elastic tongue piece 32a at the substantially center and one end side of the support panel 30. A part of the support rod 23 located between the portions 32b is bent upward, and an upward bending stopper 24 is provided.

Further, a part of the support rod 23 between the elastic tongues 32b and 32c between the substantially center of the support panel 30 and the other end side is curved downward, and a downward curving stopper 25 is provided. Has been. The upward bending stopper 24 and the downward bending stopper 25 are for controlling the rotation of the support panel 30 with respect to the support rod 23 and the positional deviation in both directions.

Next, a mechanism for swinging the support rod 23 of the support adjusting arm 21 will be described. As shown in FIG. 6, an arm member 41 is pivotally supported on the inner wall of one side frame 12a via a pivot pin 40 so as to be swingable in the front-rear direction.

More specifically, the arm member 41 is formed by fixing a round bar member 41b in a key shape, which engages with the free end 22a side of the support adjusting arm 21, to the free end of a thin thin plate member 41a. . A support bracket 42 is fixed to the inner wall of the side frame 12a, and an operation shaft 43 is rotatably supported by the support bracket 42 and the inner wall.

An operation knob 43 a is provided at the head of the operation shaft 43 extending to the outer wall side of the side frame 12 a, while an eccentric cam 44 is provided at the tip of the operation shaft 43 extending to the inner wall. Is stuck. With the rotation of the eccentric cam 44, the arm member 41 swings in the front and rear directions, whereby the swing position of the support adjusting arm 21 can be adjusted.

Next, the operation will be described. As shown in FIG. 3, the support panel 30 is integrally provided with three elastic tongues 32a, 32b, 32c at substantially the center and both sides thereof so as to be cut and raised at equal intervals. The elastic tongues 32a to 32c elastically clamp the support rod 23 of the support adjustment arm 21. When the support panel 30 is mounted on the support adjustment arm 21, a separate member or welding work is performed. There is no need, and it suffices that the support rods 23 be sandwiched between the elastic tongues 32a to 32c of the support panel 30, and the support rods 30 can be attached by one-touch.

On the other hand, in the support adjustment arm 21 on which the support panel 30 is mounted, one of two places between the elastic tongues 32a to 32c held by the support rod 23 is bent upward. The upward bending stopper 24 is provided, and the other is bent downward to provide the downward bending stopper 25. As shown in FIG. 4, when the support panel 30 is attached to the support adjustment arm 21 and the upper edge of the support panel 30 tries to rotate rearward with respect to the support rod 23, the upper surface of the rear surface of the panel 30 is moved upward. While the upward curving stopper 24 abuts, when the lower edge of the panel tries to rotate rearward, the downward curving stopper 25 abuts on the lower back surface of the panel 30, so that the support panel 30 rotates in any case. Is regulated.

Further, the upward bending stopper 24 or the downward bending stopper 25, which bends so as to project above or below the support rod 23, is provided on the side of the support panel 30 which is located beside each stopper 24, 25. Since the elastic tongues 32a to 32c are brought into contact with each other, the positional deviation of the support panel 30 with respect to the support rod 23 in both lateral directions is also restricted. As described above, the configuration of the lumbar support device 20 can be greatly simplified compared to the conventional example, the number of parts can be reduced, the assembly cost can be reduced, and the weight can be reduced.

When the seated person adjusts the support feeling of the waist by the lumbar support device 20, the operation is performed as follows. As shown in FIG. 6, when the eccentric cam 44 rotates by manually turning the operation knob 43a of the operation shaft 43, the arm member 41 in contact with the eccentric cam 44 moves back and forth due to the change in the radius of rotation of the eccentric cam 44. Rocks in the direction.

As a result, the support adjusting arm 21 supported from the rear by the arm member 41 swings, the support panel 30 can be pushed forward, and the pad material 50 (the lumbar vertebra contact portion 51 thereof) is moved forward. It is possible to adjust the feeling of support of the lumbar region by making it bulge out.

In the lumbar support device according to the present embodiment, the support panel is provided with three elastic tongues, but more elastic tongues may be provided. Even when many are provided, the upward bending stopper is provided at one of two places among the respective places between the elastic tongues of the supporting rod of the supporting adjustment arm, and the downward bending stopper is provided at the other. In this case, it is possible to prevent rotation and displacement of the support panel with respect to the support adjustment arm.

[0031]

[Effect of device]

 According to the lumbar support device of the present invention, the support panel is attached to the support adjusting arm and the structure for preventing the panel rotation is simplified, so that the number of parts can be reduced, the assembly cost can be reduced, and the weight can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a seat back (backrest) provided with a lumbar support device according to an embodiment of the present invention as viewed from the rear.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view showing a state in which a support panel is attached to a support adjustment arm that constitutes a lumbar support device according to an embodiment of the present invention.

FIG. 4 is a view taken along the line IV of FIG.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a perspective view showing a state in which the back frame having the lumbar support device according to the embodiment of the present invention mounted thereto is viewed from the front.

FIG. 7 is a perspective view showing a conventional lumbar support device.

[Explanation of symbols]

 10 ... Seat back (back) 11 ... Back frame 20 ... Lumber support device 21 ... Support adjustment arm 23 ... Support rod 24 ... Upward bending stopper 25 ... Downward bending stopper 30 ... Side support panel 32a-32c ... Elastic tongue piece

Claims (1)

[Scope of utility model registration request] 1. A lumbar support device that adjusts the support feeling of the lumbar region according to the preference of the seated person by moving a part of the backrest where the vicinity of the lumbar spine of the seated person abuts back and forth, on both sides of the frame of the backrest. A support adjustment arm having swing shafts pivoted substantially horizontally, each of which has a support rod that bends from the swing center shaft and swings in the front-rear direction between the free ends, and the pad material of the backrest. And a support panel that faces the back surface of the lumbar spine abutment part and that is attached to a support rod of the support arm and is pushed forward. The support panel is integrally molded to cut and raise at predetermined intervals, While providing a plurality of elastic tongues for elastically sandwiching the support rod of the adjustment arm, in order to regulate the rotation of the support panel with respect to the support rod and the positional deviation in both directions, One of the two places between the elastic tongues is bent upward to provide an upward bending stopper, and the other is bent downward to provide a downward bending stopper. Lumber support device.