JP2001292855A - Boolmer-type lumbar support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a boolmer type lumbar support device for improving the rigidity of a lumbar part and adjusting the lumbar part to a desired holding state. SOLUTION: This device is provided with an adjustment mechanism 10 for curving the vertical wires 31 and 32 of a boolmer 3 whose lower end part is hooked to a stabilizer shaft 4 forwards through springs 14, 15, 17 and 18 and curving the lumbar part R1 of the boolmer 3 forwards.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plummer-type lumbar support device provided with a mechanism for forcing a lumbar portion of a plummer.

[0002]

2. Description of the Related Art A conventional plummer type lumbar support device for a seat back has a plummer in the center of a seat back frame, and the plummer has a shape in which a plurality of horizontal wires are fixed to a vertical wire, and left and right vertical wires are provided. And the seat back frame are supported by being connected by a coil spring, and in the lumbar portion of the plummer, a mechanism is provided for pushing the left and right vertical wires forward, so that the holding force of the lumbar portion can be adjusted. I have.

[0003]

However, in the above-described conventional plummer-type lumbar support device, although the holding force of the lumbar portion can be adjusted by a mechanism for pushing the left and right vertical wires forward, the plummer-type lumbar support device can be adjusted. Since the lower portion is not supported by the seat back frame, there is a problem that the holding force of the lumbar portion is insufficient and the lumbar spine of the seated person cannot be strongly supported.

The present invention has been made to solve the problems of the prior art, and provides a plummer type lumbar support device capable of improving the rigidity of a lumbar portion and adjusting the lumbar portion to a desired holding state. With the goal.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a plummer-type lumbar support device provided with a mechanism for making a lumbar portion of a plummer forward, comprising a plummer at the center of a seat back frame, and a lower portion of the seat back frame. The stabilizer is supported on the seatback frame via a plurality of springs, and the vertical wire of the puller is hook-shaped at the lower end. Hanging on the stabilizer shaft, a brake mechanism is fixed to the seat back frame, and an operation shaft is connected to this brake mechanism,
A pinion and an operation handle are fixed to the operation shaft, a sector gear meshing with the pinion is fixed to the stabilizer shaft together with a bracket, and a bracket and a spring supporting a puller are connected, and the operation handle is operated to operate the pinion. An adjustment mechanism is provided for rotating the sector gear, rotating the bracket fixed to the stabilizer shaft, bending the vertical wire forward via a spring, and forcing the lumbar portion of the plummer forward.

According to the above configuration, when the operating handle of the adjusting mechanism is operated, the sector gear rotates together with the stabilizer shaft by the pinion, and the bracket fixed to the stabilizer shaft rotates. The bracket and the spring that supports the plummer are connected, and the lower end of the vertical wire of the plummer is hooked on the stabilizer shaft at the hook, so that the vertical wire bends forward through the spring and the lumber of the plummer. The department forebay. Thereby, the rigidity of the lumbar portion is improved, and the lumbar portion can be adjusted to a desired holding state.

[0007]

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIGS. 1 to 3 show an example of the structure of a plummer type lumbar support device 1 of the present invention. FIG.
FIG. 2 is a left side view, and FIG. 3 is a sectional view taken along line PP of FIG.
In addition, although the internal structure of the seat back in a state where the skin and the pad are not mounted is shown here, the whole device is in a state where the pad and the skin are covered in actual use.

This plummer type lumbar support device 1
As shown in FIG. 1, a puller 3 is provided at the center of the seat back frame 2, and a stabilizer shaft 4 extending left and right is supported at a lower portion of the seat back frame 2. The puller 3 includes a plurality of horizontal wires 34 attached to the vertical wires 31 to 33.
Has a fixed shape, and the left and right vertical wires 31, 3
2 and the seat back frame 2 are supported by being connected by coil springs 14 to 19. Further, the lower ends of the vertical wires 31 and 32 of the plummer 3 are hook-shaped as shown in FIG.
Is hung on the stabilizer shaft 4.

A brake mechanism 6 is fixed to the left side of the seat back frame 2 as an adjusting mechanism 10 for making the lumbar portion R1 of the plummer 3 bend forward. An operation shaft 7 is connected to the brake mechanism 6 and A pinion 9 and an operation handle 8 are fixed to the operation shaft 7. The sector gear 11 meshing with the pinion 9 is fixed to the stabilizer shaft 4 together with two brackets 12 and 13 arranged with the plummer 3 interposed therebetween. Then, the locking holes 12a, 13a at the tip of each bracket 12, 13
The support ends 15a, 18a of the coil springs 15, 18 are connected to the
b, 13b have support ends 14a, 1 of coil springs 14, 17
7a are connected.

FIG. 3 shows the details of the adjusting mechanism 10 together with the operating state. When the operating handle 8 is operated,
By rotating the sector gear 11 in the direction of arrow S by the pinion 9, the bracket 1 fixed to the stabilizer shaft 4 is formed.
The tip ends of the pulleys 3 and 2 are tilted in the direction of arrow T, and the lower ends of the vertical wires 31 and 32 hung on the stabilizer shaft 4 are bent forward through coil springs 14, 15, 17 and 18, and The lumbar portion R1 (see FIG. 1) is configured to be forked. Here, the state when the lumbar portion R1 of the plummer 3 is set to the foreward bay is represented by an imaginary line. Therefore, by operating the operation handle 8 of the adjusting mechanism 10,
The lumbar portion R1 of the plummer 3 can be adjusted in its lordosis state to change the rigidity of the lumbar portion R1 so that the lumbar portion R1 can be maintained in a desired holding state. Can be supported.

The brake mechanism 6 is a so-called brake drum and is structured to be rotatable only from one direction. Specifically, the brake mechanism 6 is operated by a pinion (one direction) from the operation handle 8 side. 9 can be rotated, but the pinion 9 cannot be rotated by an operation (other direction) from the sector gear 11 side (for example, the actual open flat 7).
-19562). The holding state of the lumbar portion R1 of the plummer 3 adjusted using the adjusting mechanism 10 is maintained by the brake mechanism 6.

As described above, the plummer type lumbar support device of the present invention is not limited to the specific configuration of the above-described embodiment, and it is needless to say that the configuration may be modified, added or deleted as needed. No.

[0014]

As described above, according to the plummer-type lumbar support device of the present invention, the adjustment mechanism described above
The longitudinal wire of the plummer whose lower end is hung on the stabilizer shaft can be bent forward through a spring to make the lumbar portion of the plummer bend forward, improving the rigidity of the lumbar portion and holding the lumbar portion as desired. Can be adjusted to the state.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration example of a plummer type lumbar support device of the present invention.

FIG. 2 is a left side view of the plummer type lumbar support device of the present invention shown in FIG.

FIG. 3 is a side sectional view showing details of an adjustment mechanism in the plummer type lumbar support device of the present invention,
P represents a cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plummer type lumbar support device 2 Seat back frame 3 Plummer 4 Stabilizer shaft 6 Brake mechanism 7 Operation shaft 8 Operation handle 9 Pinion 10 Adjustment mechanism 11 Sector gears 12, 13 Brackets 14-19 Coil springs 14a, 15a, 17a, 18a Support end 31 , 32 Vertical wire 31a, 32a Hook R1 Lumber

Claims (1)

[Claims] 1. A plummer-type lumbar support device provided with a mechanism for making a lumbar portion of a plummer bend forward. A plummer is provided at a center of a seat back frame, and a stabilizer shaft extending left and right is provided at a lower portion of the seat back frame. The puller is supported by a seat back frame via a plurality of springs, and the lower end of the vertical wire of the puller has a hook shape, and the hook is hung on the stabilizer shaft. A brake mechanism is fixed to the seat back frame, an operation shaft is connected to the brake mechanism, a pinion and an operation handle are fixed to the operation shaft, and a sector gear meshing with the pinion is fixed to the stabilizer shaft together with a bracket. And the bracket and the spring supporting the plummer are connected, and Has an adjustment mechanism for rotating the sector gear by the pinion, rotating the bracket fixed to the stabilizer shaft, bending the vertical wire forward through a spring, and forcing the lumbar portion of the plummer forward. A plummer type lumbar support device characterized by the following.