JPH0522124Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a seat in which the seating condition of a seated person can be adjusted.

``Prior Art'' As a conventional technique, there is one as shown in FIG. 9, for example.

That is, the backrest 2 of the seat 1 is provided with a backrest part 3 and a backrest part 4, and the backrest part 3 can be independently tilted back and forth, and when the backrest part 3 is tilted backward, A back and side support part 4 is disclosed that projects forward from the back support part 3 so as to be able to hold the seated person from the side.

"Problem to be solved by the invention" However, in such conventional technology, the back support part 4 does not protrude forward from the back support part 3 unless the back support part 3 is tilted backwards, so the back support part 3 is always pushed forward. Not only is it impossible to obtain a feeling of lateral support with the back rest 3 upright, but the back rest 3 is forced to fall backwards, and if the back rest 3 is folded down, it will not be possible to hold the back seat 3 in place. There was a problem with the seats being cramped.

The present invention was developed by focusing on these conventional problems, and allows the backrest to be adjusted by moving it forward and backward while the backrest is kept upright, thereby providing a comfortable feeling of lateral support. The aim is to provide seating that can be used.

``Means for Solving the Problems'' The gist of the present invention to achieve the above purpose is that, in a seat in which the seating position of the seated person is adjustable, the backrest rests next to the back rest. The back side support part is biased to maintain its straightness, and the intermediate bent part is bent to support the back side support part so as to be movable back and forth, and the bending angle of the back side support part is adjusted. Along with changing
The seat is characterized by being provided with an adjustment mechanism capable of holding the seat in a folded state against biasing force.

"Function" A seated person can take a stable posture by leaning his or her back against the back rest of the backrest.

If you want to feel like your body is being supported from the sides, operate the adjustment mechanism to bend the backrest at the center bend point.

As a result, the folded part is displaced back and forth, and when the back support part is held in the folded state, the folded part is in a position protruding forward of the back support part.

The seated person can obtain a comfortable seating feeling by setting the height of the folded portion of the back and side support portion to a desired height using the adjustment mechanism.

If the backrest is folded in the middle and the folded part protrudes forward, the rear part will conversely retract, so if the back seat gets hot, the person sitting in the rear seat will be able to pull it in. You can put your knees in the space and take a comfortable posture.

"Embodiments" Hereinafter, various embodiments of the present invention will be described based on the drawings. Note that similar parts in each embodiment are designated by the same reference numerals, and redundant explanation will be omitted.

1 to 4 show a first embodiment of the present invention.

As shown in FIGS. 2 and 3, the seat 10
A backrest 20 is supported on a seat part 15, and the backrest 20 is provided with backrest parts 22 on both sides of a central backrest part 21 for holding the side backs of the seated person. A rear seat 11 is arranged behind the seat 10.

The shape of the back support part 22 is formed by an elastic body built in and covered with the epidermis, and is normally urged to maintain a straight shape by the elasticity of the elastic body, as shown in FIG. .

As shown in FIG. 1, a link frame 30 is installed inside the back and side support portion 22.

The link frame 30 includes an upper frame 31 installed inside the upper part of the back and side support part 22, and an upper frame 31 that is installed in the upper part of the back and side support part 22
A lower frame 33 installed in the lower part of the frame is connected by pivoting pins 31a and 33a at each end to an intermediate link member 35.

Connecting pin 3 fixed to the upper end of the upper frame 31
2 is slidably and rotatably connected to the upper end of a main frame (not shown) built into the backrest 21, and a connecting pin 34 fixed to the lower end of the lower frame 33 is pivotally connected to the lower end of the main frame. It is worn.

A link frame 30 is installed inside the back and side support part 22, and an upper frame 31 of the link frame 30
When the lower frame 33 is bent, the intermediate link member 35 moves back and forth. The back and side rest part 22 is connected by the link frame 30 to an intermediate folded part 23 of the back and side rest part 22 to which the intermediate link member 35 corresponds.
It is also supported so that it can be displaced back and forth.

As shown in FIGS. 4 and 5, an adjustment mechanism 40 that can change the bending angle of the back support portion 22 and maintain it in a partially bent state against an urging force is connected to an upper frame 31 and an intermediate link member 35. It is provided to restrict the rotation of the.

The main members of the adjustment mechanism 40 include a claw member 41 pivotally supported at the tip of a support bracket 36 fixed to the intermediate link member 35, and a locking member 45 fixed to the upper frame 31.

The claw member 41 is biased by a compression spring 42 so as to be convertible between an engaged position shown by a solid line in FIG. 4 and a released position shown by an imaginary line.

The locking member 45 is connected to the pivot pin 3 of the upper frame 31.
A plurality of locking teeth 4 along an arc centered on 1a
6, 46..., a release protrusion 47 is provided at one end of the locking teeth 46, 46..., and a return protrusion 48 is provided at the other end. The release protrusion 47 is for removing the claw member 41 from the locking tooth 46 when the upper frame 31 and the lower frame 33 are bent the most, and the return projection 48 engages the removed claw member 41 with the locking tooth 46. This is to restore it.

Next, the action will be explained.

A seated person can take a stable posture by leaning his or her back against the backrest 21 of the backrest 20 and putting his/her weight on it.

When the seated person wants to feel a sense of support that supports the body from the side and back sides, the adjustment mechanism 40 is operated to bend the back side support portion 22 at the middle folded portion 23.

That is, when the folded part 23 of the back and side support part 22 is pushed forward, the upper part of the lower frame 33 of the link frame 30 swings forward around the connecting pin 34, and the upper frame 31 swings forward around the connecting pin 32. As the lower part swings forward, the connecting pin 32 is slightly lowered to prevent operational interference. As a result, the intermediate link member 35 moves forward.

The intermediate link member 35 and the upper frame 31 are mutually bent, and the locking member 45 and the claw member 41 of the adjustment mechanism 40 are mutually displaced.

The pawl member 41 is in the engagement position as shown in FIG. 5, and when the locking member 45 and the pawl member 41 are mutually displaced, the pawl member 41 rides over the locking teeth 46. When you stop pushing out the folded part 23, the back support part 22 tries to return to a straight posture, but the claw member 4
1 meshes with the locking teeth 46 and does not allow return, and the back and side support portion 22 is held in a folded state.

As shown in FIG. 2, when the back side rest part 22 is held in a folded state, the folded part 23 is
It will be in a protruding position before 1.

As shown in FIG. 4, the claw member 41 is connected to the locking member 4
The position where the upper frame 31 and the intermediate link member 35 are bent enough to hit the release protrusion 47 of No. 5 is the position where the center folded portion 23 of the back and side support portion 22 protrudes most forward.

When the folded part 23 is further pushed out, the claw member 4
1 is pushed by the release protrusion 47 of the locking tooth 46,
In FIG. 4, it rotates clockwise and switches to the release position shown by the imaginary line, where it is held by the biasing force of the compression spring 42.

Since the claw member 41 and the release protrusion 47 of the locking tooth 46 are disengaged and the restraint of the back side rest part 22 is released, the back side rest part 22 returns to its straight posture. When the claw member 41 returns, the tip of the claw member 41 comes into contact with the return protrusion 48 of the locking tooth 46, rotates counterclockwise to the engagement position, and meshes with the first locking tooth 46 as shown in FIG. .

At this time, as shown in FIG.
2 is straight and runs along the backrest part 21.

If the folded portion 23 is pushed out from the state shown in FIG. 3, the back and side support portion 22 can be held in the folded state as described above.

The seated person can adjust the back and side rest part 22 by the adjustment mechanism 40.
By setting the height of the folded portion 23 at a desired height, a comfortable seating feeling can be obtained.

When the back and side rest part 22 is folded in the middle and the folded part 23 protrudes forward, the rear part will conversely be retracted, so the person sitting in the rear seat 11 will have to place his/her knees in the retracted space. You can put it in and take a comfortable position.

FIG. 6 shows a second embodiment.

In this embodiment, a seat 10a having a plurality of seating portions is used.
The present invention is applied to.

That is, the seat 10a has two seating parts, each having a backrest part 21, 21,
Back support parts 22 on both sides of each back support part 21, 21,
22... are provided.

In the second embodiment as well, it is possible to obtain a feeling of lateral holding by pushing the folded portion 23 of the back side support portion 22 forward to an appropriate height.

FIGS. 7 and 8 show a third embodiment.

The seat 10b according to the third embodiment has a backrest part 2
The bending direction of the center bending part 2 is arranged so that the center bending part 23 protrudes toward the front side.
Even if 3 is made to protrude, there is an advantage that the back rest part 21 does not become cramped.

``Effects of the invention'' According to the seat according to the invention, the back support part can be folded in the middle even when the backrest is kept upright, and the folded part can be appropriately projected forward and held. Therefore, the seated person can adjust the position to his or her preference and rest his or her back against the side to obtain a feeling of lateral support, while for those seated in the rear seats, the area near the knees becomes wider, resulting in a more comfortable seat.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is a side view of the seat, FIG. 2 is a perspective view of the seat with the back and side rests folded in the middle, and FIG. The figure is a perspective view of the seat with the back and side rests in a straight position, FIG. 6 is a perspective view of the seat according to the second embodiment; FIGS. 7 and 8 show the third embodiment; FIG. 7 is a perspective view of the seat; FIG. 8 is a horizontal sectional view of the seat at the center-folded portion, and FIG. 9 is a perspective view of the conventional seat. 10, 10a, 10b... Seat, 20... Backrest, 21... Back rest part, 22... Back side rest part, 2
3...Central folding part, 30...Link frame, 3
1... Upper frame, 33... Lower frame, 35...
...Intermediate link member, 40...Adjustment mechanism, 41...
Claw member, 45... Locking member, 46... Locking tooth, 4
7...Release protrusion, 48...Return protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] In a seat in which the seated state of the seated person can be adjusted, the backrest is made up of a backrest and a backrest for placing the side back against the side of the backrest. While biasing the abutment part to keep it straight, the middle bent part bends to support the abutment part so as to be movable back and forth, changing the bending angle of the back and side abutment part, and
A seat characterized by being provided with an adjustment mechanism capable of holding the seat in a folded state against biasing force.