JP2512788Y2 - Spring structure for vehicle seats - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring structure for a vehicle seat.

[0002]

2. Description of the Related Art As a vehicle seat type, a first spring structure having a first support spring frame for supporting a cushion pad supported by a cushion frame forming a seat cushion, and a seat back. There is a vehicle seat including a second spring structure having a second support spring frame body supported by a back frame that supports the back pad. Then, in the vehicle seat, the seat cushion and the seat back are respectively configured in a state where the first spring structure and the second spring structure are completely independent from each other.

[0003]

As described above, in the vehicle seat of the above-mentioned type, since each spring structure is independent in the seat cushion and the seat back, the occupant is seated on the seat. In the state, the seat cushion side frequency and the seat back side frequency are different from each other, and when the occupant is ergonomically observed, a buckling phenomenon occurs in the upper half of the occupant's upper body and the neck and lumbar vertebrae Large stress concentrates in two places. Then, in the upper body, muscles are activated to maintain the posture to cope with this, which may be a factor causing upper body fatigue and low back pain. Therefore,
An object of the present invention is to eliminate the cause of fatigue to the occupant in the vehicle seat of the above-described type by making the vibration frequencies of the upper body and the lower body of the occupant as uniform as possible.

[0004]

According to the present invention, in a vehicle seat of the above type, an upper support spring frame body and a lower support spring frame body are used as a second support spring frame body which constitutes the second spring structure. At least a pair of upper and lower support spring frames are employed, and upper and lower end portions of the upper and lower support spring frame bodies are rotatably connected to each other in the front-rear direction, and the lower end portion of the lower support spring frame body and the first The rear end of the support spring frame of the spring structure is rotatably connected to each other in the front-rear direction, and the upper end of the upper support spring frame can be slid rearward and downward with respect to the back frame. It is characterized by being attached to.

[0005]

In the vehicle seat having such a structure,
When the first spring structure that constitutes the seat cushion bends due to the load of the occupant, both upper and lower support spring frames that form the second spring structure that is connected to the support spring frame that forms the spring structure. Move downwards following each other, both support spring frame bodies constituting the second spring structure rotate in the front-rear direction at their connecting portions, and the upper end portion of the upper support spring frame body has a back frame. Move backwards and downwards.

[0006]

Therefore, in the seat, the second spring structure that constitutes the seat back moves up and down following the first spring structure that constitutes the seat cushion in response to the load of the occupant. Since it changes in the direction, it is possible to eliminate the action force that causes the upper half body and the lower half body of the occupant to be displaced.
Further, in the second spring structure that constitutes the seat back, the upper and lower support spring frame bodies change with respect to each other or the first spring structure in response to the load of the occupant, so the seat is formed. The cushion and the seat back are supported according to the body shape of the occupant. As a result, the seat cushion and the seat back have substantially the same frequency, and stress is not concentrated on the lumbar spine and neck, and the driver's fatigue factor can be eliminated. In particular, the compressive load repeatedly applied to the lumbar region of the occupant is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a cushion frame and a back frame of a vehicle seat supporting a spring structure according to the present invention. The spring structure is the first spring structure 10a.
As shown in FIG. 2, the first spring structure 10a constitutes a seat cushion S1 and the second spring structure 10b constitutes a seat back S1. The seat cushion S1 is the first spring structure 10
a, a cushion frame 21 and a cushion pad 22 that support the spring structure 10a, and the seatback S2 includes a second spring structure 10b, a back framed 23, and a back pad 24.
The back frame 23 is attached to the rear end of the cushion frame 21 at its lower end so as to be tiltable in the front-rear direction via a hinge pin and a reclining adjuster 25, which are not shown.

The first spring structure 10a comprises a support spring frame 11, a plurality of compression coil springs 12 and a plurality of wave-shaped tension springs 13, and the support spring frame 11 includes each compression coil spring 12.
Is supported on the cushion frame 21, and each tension spring 13 is stretched between the front end 11 a of the support spring frame 11 and the front end of the cushion frame 21. The second spring structure 10b is composed of a lower support spring frame body 14, an upper support spring frame body 15 and a plurality of compression springs 16. Both of these support spring frame bodies 14 and 15 have upper and lower end portions 1 respectively.
4a and 15a are connected to each other so as to be rotatable in the front-rear direction.

Each of these support spring frames 14 and 1
5, the lower support spring frame body 14 is connected at its lower end portion 14b to the rear end portion 11b of the support spring frame body 11 constituting the first spring structure 10a so as to be rotatable in the front-rear direction. The upper support spring frame 15 has an upper end portion 15b formed of a rod, and the left and right end portions of the upper end rod portion 15b are fitted to rod guides 23a and 23b provided on the back frame 23. Both rod guides 23a and 23b project upward and forward from the left and right frame portions of the back frame 23 and are opened upward, and the upper end rod portion 15b is provided in each rod guide 23.
It can slide rearward and downward along a and 23b. A cushion pad 22 is placed on the first spring structure 10a, and the cushion pad 22 is covered with a cushion cover and assembled and fixed to the cushion frame 21. The sheet cushion S1 is constituted by the above. In addition, the second spring structure 10
A back pad 24 is placed on the front surface of b, and the back pad 24 is covered with a back cover and assembled and fixed to the back frame 23.
A sheet back S2 is constituted by 3, 24.

In the vehicle seat provided with the spring structure having such a structure, the occupant M sits down as shown in FIG.
In this seated state, when the support spring frame 11 of the first spring structure 10a forming the seat cushion S1 is bent downward by the load of the occupant M, the second spring structure 10b connected to the support spring frame 11 is formed. Both the upper and lower support spring frames 14 and 15 follow and move downward, and the two support spring frames 14 and 15 rotate in the front-rear direction at the upper and lower end portions 14a and 15a which are mutual connecting portions, and The upper end rod portion 15b of the upper support spring frame body 15 moves rearward and downward along both rod guides 23a and 23b.

Therefore, in the vehicle seat, the second spring structure 10b forming the seat back S2 follows the first spring structure 10a forming the seat cushion S1 corresponding to the load of the occupant M. Then, since it changes in the vertical direction, the acting force that causes the upper half body and the lower half body of the occupant M to be displaced can be eliminated. In addition, in the second spring structure 10b that constitutes the seat back S2, both upper and lower support spring frames 15 and 14 correspond to the load of the occupant M.
Change with respect to each other or with respect to the first spring structure 10a, the seat cushion S1 and the seat back S2.
Will support the occupant M according to his / her body shape. As a result, the seat cushion S1 and the seat back S2 have substantially the same frequency, and stress is not concentrated on the lumbar spine and neck, and the fatigue factor of the occupant M can be eliminated. In particular,
The compressive load repeatedly applied to the lumbar region of the occupant M is reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a spring structure and a frame supporting the spring structure according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view showing a seated state of an occupant with respect to a vehicle seat provided with the spring structure.

[Explanation of symbols]

10a ... 1st spring structure, 10b ... 2nd spring structure, 1
DESCRIPTION OF SYMBOLS 1 ... Support spring frame, 12 ... Compression coil spring, 14 ... Lower support spring frame, 15 ... Upper support spring frame, 21 ... Cushion frame,
22 ... Cushion pad, 23 ... Back frame, 24
... back pad.

Claims (1)

(57) [Scope of utility model registration request] 1. A first support for supporting a cushion pad supported by a cushion frame which constitutes a seat cushion.
A first spring structure having a support spring frame and a second spring structure having a second support spring frame that is supported by a back frame forming a seat back and supports a back pad. In such a vehicle seat, at least a pair of upper and lower support spring frame bodies of an upper support spring frame body and a lower support spring frame body are adopted as the second support spring frame bodies forming the second spring structure. The upper and lower ends of the upper and lower support spring frames are connected to each other so as to be rotatable in the front-rear direction, and the lower end of the lower support spring frame and the rear end of the support spring frame of the first spring structure are connected to each other. Are rotatably connected to each other in the front-rear direction, and the upper end of the upper support spring frame is attached to the back frame. Spring structure in a vehicle seat, characterized in that assembled slidably rearward lower side with.