JPH0236537Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a chair.

PRIOR TECHNOLOGIES AND THEIR PROBLEMS There are various types of chairs, such as those for office use, study use, comfort use, various types of work, and body correction use. Since the seat is bent forward at the waist (bent forward), sitting for long periods of time is likely to cause problems such as fatigue. To free your body from this state,
The best posture is to lean your body backwards. Some conventional chairs have a backrest that can tilt backwards with a spring force;
The sitting person can only reduce the amount of flexion between the upper and lower body, and cannot arch the body in the opposite direction to the sitting posture or in a state similar to this, and cannot fully release the body. .

This invention solves these conventional problems and
To provide a chair in which a seater can easily take a posture of bending his/her body backward by his or her own strength.

Means for Solving the Problems The object of the present invention is to provide a support body having a base part that contacts the installation surface during installation, a back part that stands up while being supported by the base part, and an upper part of the base part. a seat supported by the seat; a backrest supported by the back; a backrest plate rotatably attached to a support shaft; a main body that supports the seat and the back and is slidably supported on the legs; It has an adjustment part that can be held at approximately the same angle, and the adjustment part includes a folding stay made of two elongated plates, each of which has one end rotatably connected to the other. one of the other ends is rotatably connected to the front end of the main body, and the other end is rotatably connected to the front end of the base, and in the unfolded state, there is a connection between the main body and the base under a detent. The rear end of the base portion is configured to support the support shaft at least when the main body portion is slid to the forwardmost position, compared to the position of the support shaft when the seater is tilted backwards to the maximum. This is achieved by a reclining chair characterized by being positioned at the rear.

The back portion may be fixed to the seat portion so as to be substantially immovable.

The back of the tilt-down chair is attached to the base so as to be rotatable around a horizontal axis and is erected by a forward spring force, and the rear end of the base is When the main body is slid to the most forward position, the seat is positioned rearward from the position of the backrest support shaft when the back rotates most rearward due to the maximum backward tilt of the seater. can be taken as a thing. Here, the state in which the back has rotated most rearwardly refers to the state in which rotation is stopped at a certain position when the back is tilted backward; When the back part rotates elastically without certain restrictions, it refers to the state in which the back part is rotated when a normal user is in the maximum backward leaning state (see Figure 3) with the hips lifted off the seat. shall be.

In either case, the backrest plate can be fixed so as not to rotate, if necessary.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The reclining chair 1 shown in FIG.
and a backrest portion 4. The support body 2 includes a base portion 2a and a back portion 2 that stands up while being supported by the base portion 2a.
b, and the base portion 2a has a leg portion 21 and a main body portion 2.
2. The leg portion 21 is composed of two rods extending in an upwardly convex arc shape in the front-rear direction of the chair, and each lower end serves as the base portion 20. The main body portion 22 includes a pair of arc-shaped cylinder portions 220 connected in the horizontal direction through which each rod of the leg portion 21 is slidably passed;
A seat support part 221 that supports the seat part 3 and a cylinder part 22
0 and the seat support part 221 at the front and rear of the seat, respectively, and one pair of adjustment parts 223 and connection parts 222 are provided. The connecting part 222 has a lower part fixed to the cylindrical part 220, an upper end part attached to the rear part of the seat support part 221 so as to be rotatable around a horizontal axis, and a lower end that penetrates the cylindrical part 220 and has a leg part 21 attached thereto. A set screw 224 is provided that extends to abut. The adjustment section 223 has two elongated plates, one end of which is pivoted to the cylinder section 220 and the seat support section 221, and the other ends of which are pivoted to each other, so that the two elongated plates are rotated in the longitudinal direction in an expanded state slightly over 180 degrees. This is a foldable stay that has an abutting portion to provide tension support against the compressive load between both pivot points. This stay is
2 is slid on the legs 21, folded when in the rear position, and unfolded when in the front position, thereby moving the seat support part 221 and the back part 2b between the two positions onto the chair installation surface. However, the dimensions are determined so as to maintain the angle at approximately the same angle. The leg portion 21 is provided with a stopper 210 that abuts each end of the cylindrical portion 220 at these front and rear positions. Rear base part 2 in leg part 21
0 means that when the main body portion 22 is in the front position,
It is positioned at the rear of the backrest portion 4 support shaft 40, which will be described below. The back portion 2b is composed of a pair of metal pipes that are fixed to the rear end portion of the seat support portion 221 and stand upright. The seat portion 3 may be made of hard material, soft material, spring supported material, etc.
Be free. The backrest portion 4 includes a support shaft 40 supported between a pair of metal pipes of the back portion 2b and extending in the horizontal direction, and a backrest plate 41 rotatably attached to the support shaft 40.

This chair 1 can be used as follows. When taking a normal sitting posture, the main body part 22
is placed on the leg 21 in a rearward position. At this time, the stay of the adjustment part 223 is closed (see FIG. 1). In this rear position, the seat 3 can be fixed to the center of the legs 21, and the load of the sitter is distributed approximately evenly to the base 20 of each leg 21, resulting in a stable sitting condition. The main body part 22 is the leg part 21
When slid into the upper forward position, the chair 1 can be used as follows. After sliding, the cylindrical part 220 is fixed to the leg part 21 with the set screw 224.
It is fixed at the top, and the stay of the adjustment part 223 is expanded in the forward position. The seater can easily take a backward leaning posture from a normal sitting posture by rotating the backrest plate 41. This state is shown in FIG.
Since the back portion 2b of the support body 2 is fixed to the seat support portion 221, the support body 2 maintains a substantially constant position even when the seater tilts back to the maximum extent. When the main body portion 22 is slid to the forward position, the rear end of the base portion is located rearward of the backrest support shaft 40 as described above, so even if the seater leans back significantly, the chair 1 will not become unstable or cause falls. Therefore, as shown in FIG.
You can take a highly arched posture with your body lifted up from the ground, and arch your body until it is in the opposite direction to the forward-bent posture when seated. The position of the rear end of the base part 20 when the main body part 22 is slid to the forward position is 5 cm rearward of the position of the support shaft 40 (which is substantially constant in this example) when the seater is at maximum backward tilt. It is desirable that the length be more than 5 cm, and more preferably 5 cm to 20 cm. If this distance is less than 5 cm, there may be a lack of certainty in preventing the chair from tipping over or becoming unstable. If it is larger than 20 cm, the stability of the chair will not increase even though the installation area of the chair will increase, and the chair will have an unnecessary size, which is not desirable.

When taking the normal sitting position, the backrest plate 41 may be fixed by passing a pin through the back portion 2b and through the backrest plate 41 as shown by the dashed line A in FIG.

The reclinable chair 1A shown in FIG. 4 is the same as the previous chair 1 in that it includes a support body 2', a seat part 3, and a backrest part 4. In this example, like parts or parts are designated by like numbers. The back part 2b' of the support body 2' is rotatably supported by the seat part support part 221 by a horizontal axis 211, and the box-shaped frame 212 attached to the seat part support part 221' and the lower surface of the back part 2b' A compression coil spring 213 inserted between them causes them to stand up with a forward spring force. The back part 2b' rotates around the shaft 211 against the spring force as the seated person leans back, and when the seated person leans back the most, the lower rear end of the back part 2b' comes into contact with the frame 212. Stop rotation. When the main body portion 22 is slid to the forwardmost position, the rear end of the base portion 20 is rearward from the position of the backrest support shaft 40 when the back portion 2b' is rotated to the rearmost position. , preferably in the position described in the previous example.

Therefore, the seater can easily take a backward leaning posture by utilizing both the rotation of the backrest plate 41 and the rotation of the back portion 2b', and for example, the seater can easily take a backward leaning posture as shown in FIG. 3 in the above-mentioned example. Even if the back part 2b' rotates to the rearmost position when the chair 1' is tilted, the back support of the base part 20 as described above prevents the chair 1' from becoming unstable or falling over. It can fully meet the demands for backward tilting.

The adjustment part 223 can be made of various types that can support the frame 221 on the cylindrical part 220 with height adjustment, in addition to the above-mentioned folding stay.

Effects of the invention According to the invention, it is possible to provide a chair that has the following effects. That is, when taking a normal sitting posture, the main body is placed in the rear position above the legs,
This provides a stable state in which the load of the sitter is distributed approximately equally to each leg. When the main body is slid to the forwardmost position on the legs, the rear end of the base is located behind the backrest support axis when the seater is tilted back to the maximum, and the backrest plate is aligned with the horizontal axis. Since the seat is attached so that it can rotate around the surroundings, the seater can use the support of the backrest plate and the rotation of the backrest plate to prevent the seater from falling backwards while also allowing the seater to recoil significantly backwards using his or her own strength. Can take a crouched position.

In this case, the sitting person can bend his/her body until it is in the opposite direction to the forward bending posture when sitting, which is extremely effective in relieving body distortion and accumulated fatigue.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
FIG. 2 is a side view of the example in FIG. 1 in one usage state, FIG. 3 is a side view in another usage state, and FIG. 4 is a side view of another example in partial cross section. It is a diagram. 1, 1'...Flexible chair, 2, 2'...Support, 3
...Seat part, 4...Backrest part, 2a...Base part, 2
b, 2b'...back, 20...base, 21...
Leg part, 22... Main body part, 40... Support shaft, 41...
...backrest plate, 223...adjustment section.

Claims (1)

[Claims for Utility Model Registration] A support body having a base part that contacts the installation surface during installation, a back part that stands up while being supported by the base part, and a seat part supported by the upper part of the base part. and a backrest supported by the back, the backrest being supported by the back and extending horizontally and receiving a load when the seater leans back, and the backrest being rotatable about the support shaft. and a backrest plate attached thereto, and the base part supports leg parts having the base part at the lower part and extending in the front and back direction of the chair in an upwardly convex arc shape, and the seat part and the back part. a main body slidably supported on the legs, and the main body can hold the seat and the back at substantially the same angle with respect to the chair installation surface at the front and rear positions of the chair in the sliding movement. The adjustment section includes a folding stay made of two elongated plates, each of the two elongated plates being rotatably coupled to each other at one end and connected to each other at both other ends. One side is closer to the front of the main body,
The other is rotatably coupled to the front end of the base, and is configured to provide tension support between the main body and the base under a detent in the unfolded state, and the rear of the base An inverted chair, characterized in that the end is located at least rearward of the position of the support shaft when the seater is tilting backwards at its maximum, when the main body is slid to the forwardmost position. . The reclining chair according to claim 1, wherein the back portion is fixed to the base portion so as not to substantially move. The back portion is rotatably attached to the base portion around a horizontal axis and is erected by a forward spring force, and the rear end of the base portion is arranged such that the main body portion is in the forwardmost position. Practical use characterized in that when the seat is slid, the seat is positioned rearward from the position of the backrest support shaft when the back rotates furthest back as the seater tilts back the most. An inclineable chair as set forth in claim 1 of the patent registration claim. The reclining chair according to any one of claims 1 to 3, wherein the backrest plate can be fixed so as not to rotate as required.