JPH0421322Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to the improvement of vehicle seats, and more specifically, the invention relates to the improvement of vehicle seats, and more specifically, the invention relates to a support for the side of the lumbar vertebrae that supports the lumbar vertebrae of a seated person from both sides in a seat such as an automobile. This invention relates to a vehicle seat in which a swinging member supported by the seat can be adjusted to be wide or narrow.

(Prior Art) In general, in the seats of automobiles, etc., in order to prevent the body of the seated person from shaking, especially from side to side,
A raised portion was formed around the periphery of the backrest of the seat.

However, since the raised portion is integrally fixed to the backrest portion of the seat, the width cannot be adjusted in accordance with the physique and preferences of the seated person.

Therefore, in order to improve these problems,
A support device for the side of the lumbar vertebrae has been proposed that raises both sides of the lower half of the backrest of a car seat and adjusts the distance between the raised parts.
The method described in Publication No. 57-24211 has been proposed.

(Problem to be solved by the invention) However, in conventional devices of this kind, the support mechanism has a complicated structure, and not only does it lack stability due to breakdowns, but also requires a large number of assembly man-hours. Because of the large support structure, the mechanism becomes large, and the raised part of the backrest becomes wide as a whole, making the seat large and uneconomical.

This invention was achieved as a result of studies to solve the problems of the conventional vehicle seats mentioned above.

Therefore, the purpose of this invention is to bulge both sides of the lower part of the backrest of the seat, and to provide a support device with a simple structure built into the bulges.
To provide a vehicle seat in which the interval between protuberances can be adjusted wide and narrow, and the adjustment operation is stable and economical.

(Means for Solving the Problems) In order to achieve the above object, the vehicle seat of this invention is provided with a support body and a swinging member on both lower side frames of a back frame in the vehicle seat, and An adjusting device for swingably adjusting both swinging members is provided on the support body, a connecting plate having one end attached to the adjusting arm of the adjusting device and converting vertical movement into horizontal movement, and the other end of the connecting plate. A link member is attached to the adjustment device, and the link plate is horizontally rotatable about the other end of the link plate as a fulcrum, and the one swinging member is attached to the other end of the link plate. One of the connecting rods is attached to a part of the one swinging member, and the other swinging member supported by the other support is attached to the other of the coupling rod, and the seat is formed by the support. The space between the lower both sides of the backrest portion is adjustable.

(Function) According to the vehicle seat of this invention, by operating the adjustment device provided on one side of the seat, the lower part of the backrest of the seat is The swinging members on both sides can face each other and swing by the same amount.

Since the vehicle seat of this invention requires fewer component parts, it is possible to not only make the entire seat more compact, but also reduce assembly man-hours, improving operational stability and economical effects. can.

(Example) Hereinafter, an example of the vehicle seat of this invention will be specifically described with reference to the drawings.

FIG. 1 shows an embodiment of the vehicle seat of this invention. The vehicle seat 1 is composed of a seat bag 3 and a seat cushion 5. Protrusions 7A and 7B are formed on both sides of the lower part of the seat bag 3. It has been done.

Further, on both sides of the lower part of the seat back 3, there are adjustment mechanisms 9 for adjusting the distance between the raised portions 7A and 7B.
However, in addition, a lumbar support adjuster 11 is built in near the center of the seat back 3.
An operation knob 13 for adjusting the adjustment mechanism 9 and the lumbar support adjuster 11 is provided to protrude from one raised portion 7A.

Next, the adjustment mechanism 9, which is the main part of this embodiment, will be explained in more detail with reference to FIGS. 2 to 5.

In FIGS. 2 and 3, the back frame 15 includes an upper frame 17, both side frames 19A and 19B, and a lower frame 21, which are integrally and continuously formed into a frame shape using metal tubing.

Both side frames 1 of this back frame 15
Between 9A and 19B is an S-shaped spring 2.
3 is stretched at a plurality of locations, and an adjustment mechanism 9 for supporting the side of the lumbar vertebrae of a seated person and a lumbar support adjuster 11 for supporting the lumbar vertebrae are attached to the lower part.

The adjustment mechanism 9 that supports the lumbar side of the seated person includes an adjustment device 25, a link member 27, and a swing member 29.
It is composed of.

The adjusting device 25 is a stepless fine-adjustable device called a Taumel mechanism shown in FIGS. 4 and 5.
It is constructed by known means.

Although detailed explanation of this adjustment device 25 is omitted,
The main point is that an adjustment bracket 35 having spur teeth 33, which are external gears, is fixed to a support frame 31 as a support with screws 37. Then, an adjustment arm 41 having an internal gear 39 having at least 1 to 3 more teeth than the spur teeth 33 is engaged and rotatably supported by an adjustment shaft 45 having an eccentric shaft portion 43. has been done. In addition, the adjustment shaft 4
At the tip of 5 there is a wave washer 47 and a flat washer 4.
9. The operating knob 13 is engaged via a snap ring 51 and is attached to the adjustment shaft 45 by a nut 53 and a cap 55.

Further, the configuration of the link member 27 is as follows.

That is, a rotatable connecting plate 61 is coupled with a pin 59 to a long hole 57 provided at one end of the adjusting arm 41, and the holes provided at both ends of the connecting plate 61 are vertically connected to each other by the rotation of the adjusting arm 41. It has been displaced 90 degrees to convert the motion into horizontal motion.

A hole 63 is provided at the other twisted end of the connecting plate 61, and a pin 73 connects the hole 67 of the link plate 65 and the elongated hole 71 of the upper bearing portion 69 provided above the support plate 31. The structure is as follows.

Also, a hole 75 at the other end of the link plate 65
One end of a frame 77 of the swinging member 29, which will be described later, is fitted into the frame.

Furthermore, the configuration of the swinging member 29 is as follows.

That is, the frames 77 and 79 are formed in a U-shape.
are rotatably locked to the support frames 31 and 81, respectively, and the upper part of the frame body 77 is inserted into the hole 75 of the link plate 65 described above, and the lower part is connected to the hole 83 provided at the tip and the lower side of the support frame 31. Bearing part 85
It is connected to a hole 87 provided in the hole 87 with a pin 89, and is rotatably supported.

A hole 88 provided at the lower end of the frame 77
A connecting hole 91 provided on the same plane and a predetermined distance apart from
and a hole 9 made at one end of the bent connecting rod 93.
5 are engaged by a pin 97 and are swingably connected.

The other side of the connecting rod 93 is swingably locked into a hole 99 provided at the lower end of the frame 79 by a pin 101, and is further connected to the hole 99 provided at the lower end of the frame 79 by a predetermined amount. A hole 103 serving as the center of rotation of the frame body 79 provided separately and on the same plane and a hole 107 provided in the lower bearing portion 105 of the support frame 81 are connected with a pin 109 to be rotatably supported, The lower end of the frame body 79 is supported by being inserted into a hole 13 provided in an upper bearing portion 111 of the support frame 81.

The seat back 3 is formed by covering the back frame 15 configured in this manner with a cushion material and covering the upper surface with a skin.
Protrusions 7A and 7B are formed at the portion 9.

With the above configuration, when the operation knob 13 protruding from the raised portion 7A at one end is rotated, the eccentric shaft portion 43 provided on the adjustment shaft 45 integrated with the operation knob 13 eccentrically moves the adjustment arm 41 in the same direction. Therefore, the internal gear 39 moves its meshing position with respect to the spur teeth 33 by the ratio of the number of teeth.

Then, the connecting plate 61 connected to the rotated adjustment arm 41 moves in the horizontal direction, and the frame body 77 swings in the left-right direction in FIG. 3.

The frame 79 on the other side, which is connected to the frame 77 via the connecting rod 93, moves in the left-right direction in FIG. moves the same amount in the opposite direction.

That is, by allowing the left and right frames 77 and 79 to be widened and narrowed by the same amount, the raised portions 7A and 7
Since B also moves by the same amount, the width can be appropriately selected depending on the physique and preferences of the person sitting, and a stable seating feeling can be obtained.

Furthermore, in addition to the above-mentioned mechanism, the lower part of the back frame 15 is provided with a lumbar support adjuster 11 for adjusting the support position of the lumbar vertebrae.

The lumbar support adjuster 11 is composed of an adjustment device 115 located below the adjustment mechanism 9 that supports the side portion of the lumbar vertebra described above, and a lumbar support mechanism 117.

Here, the adjustment device 115 is the adjustment device 25 adopted in the adjustment mechanism 9 that supports the side portion of the lumbar vertebrae described above.
It has the same configuration as , and the detailed explanation will be omitted by giving the same numbers to the same parts.
However, a component different from the adjustment device 25 is an adjustment arm 119, which has a U-shape and is provided with a hole 123 extending therethrough for supporting a rod 121 of a lumbar support mechanism 117, which will be described later.

The lumbar support mechanism 117 is composed of a rod 121 and a lumbar support plate 125 that is engaged with the rod 121. One end of the rod 121 is inserted into the hole 123 of the adjustment arm 119 described above, and the other end of the rod 121 is inserted into the hole 123 of the adjustment arm 119. Bearing portion 127 provided on support frame 81
is inserted into the hole 129 and is rotatably supported.

With the above configuration, by rotating the operation knob 13, the adjustment arm 119 is rotated by a small amount via the adjustment bracket 35, and the lumbar support plate 12 fixed to the rod 121 connected to the adjustment arm 119 is rotated.
The inclination angle and position of the lumbar support plate 125 can be changed, and the position of the lumbar support plate 125 can be appropriately set according to the physique and preference of the seated person.

(Effects of the invention) As can be understood from the embodiments described above, according to the vehicle seat of this invention, by operating the adjustment device, the , the swinging members on both sides of the lower portion of the seat back can be pivoted by the same amount to face each other.

Since the vehicle seat of this invention has fewer constituent members, the thickness of both sides of the seat can be reduced, and the entire seat can be made more compact.

Furthermore, the number of assembly steps can be reduced, and operational stability and economical effects can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the vehicle seat of this invention, FIG. 2 is an exploded perspective view showing the assembled state of the adjustment mechanism in this invention, and FIG.
FIG. 4 is a cross-sectional view taken along the line - in FIG. 3, and FIG. 5 is a cross-sectional view taken along the line - in FIG. 4. 1...Vehicle seat, 9...Adjustment mechanism, 15...
Back frame, 25... Adjustment device, 27... Link member, 29... Rocking member, 61... Connection plate, 65... Link plate, 77, 79...
Frame body, 93...Connection rod.

Claims (1)

[Scope of utility model registration request] A support body and a swinging member are provided on both lower side frames of a back frame in a vehicle seat, and an adjusting device for swingably adjusting both swinging members is provided on one of the supports, and an adjusting arm of the adjusting device is provided. A link member consisting of a connecting plate that is attached to one end of the connecting plate and converts vertical movement into horizontal movement, and a link plate that is attached to the other end of the connecting plate and is horizontally rotatable about the other end of the connecting plate as a fulcrum. is attached to the adjustment device, one of the swinging members is attached to the other end of the link plate, one of the connecting rods is attached to a part of the one of the swinging members, and the other of the connecting rods is attached to the other end of the link plate. A vehicle seat, characterized in that the other rocking member supported by a support is attached to each, and the interval between the lower both sides of the backrest portion of the seat formed by the support is adjustable.