JP2001149163A - Chair structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair structure with reduced rear-side space at the time of flattening and facilitated operability by flattening a backrest part in such a way as to be drawn to the lower side of a seat part and interlocking a foot mount base with the raising and flattening of the backrest part to be taken in and out. SOLUTION: A chair is constituted of a seat part 2 provided on a base 1 at a predetermined height, a backrest part 3 arranged in the rear of the seat part 2, a suspending member 4 to pivot the backrest part 3 at the seat part 2 in a suspended state, a raising/flattening member 5 connected in such a way that the backrest part 3 can be pushed and drawn in the direction of the seat part 2, a foot mount base 6 pivoted at the front part of the seat part 2 in a drooping state, and a connecting member 7 provided between the foot mount base 6 and backrest part 3. By pushing and drawing the raising/flattening member 5, it is possible to push/raise and draw/flatten the backrest part 3 in the direction of the seat part 2 and to interlock the foot mount base 6 with the raising and drawing of the backrest part 3 to be taken in and out automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair structure in which a backrest portion of a chair does not affect the rear side of the backrest portion when the backrest portion falls down. More specifically, the present invention relates to a chair having a footrest. The present invention relates to a chair structure in which the backrest portion is made to appear and retract in conjunction with the upside-down movement of the backrest portion, and the space on the rear side of the backrest portion when the backrest portion falls down is minimized.

[0002]

2. Description of the Related Art A conventional chair structure of this type includes a slide for moving a seat back and forth in order to correct a positional shift between a user's back and a backrest caused by the fall of the backrest of the chair. A chair structure with a mechanism has already been developed.

For example, as a chair structure provided with the above-mentioned slide mechanism, a structure in which a seat portion moves forward by a predetermined distance in conjunction with the fall of a backrest portion, or a seat position setting of a seating position is provided. For the purpose, there is a configuration in which the seat portion can be moved by a desired width independently of the reclining of the backrest portion. In any case, the backrest is moved by moving the seat portion to an appropriate position in the front and rear. Even when the part is in the standing posture (normal sitting state) or the lying posture (reclining state), the backrest part and the user's back are brought into contact with an appropriate position to maintain a comfortable posture.

[0004]

In a chair structure having a normal reclining mechanism, the backrest portion of the chair is configured to be raised and lowered. It is necessary to provide a considerable back space on the side, and there is a problem that a considerably large installation space is required.

Further, in the above-described conventional chair structure, since the seat itself is moved back and forth so as to perform an adjustment related to the backrest, the seat moves forward. Considering the range, it is necessary to provide a considerable space for the front part. Further, in this structure, the backrest part does not move back and forth with the movement of the seat part. The back side also requires a back space, and there is a problem that the installation space requires a larger space than a normal chair structure.

Further, in the above-mentioned conventional chair structure having a footrest, it is necessary to secure an installation range in consideration of the protruding posture of the footrest. There is also a problem that the operability is complicated because most of them appear and disappear.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and the present invention has been made in such a manner that the backrest portion is pulled down to the lower side of the seat portion so that the backrest portion is folded down. The rear side space is made as small as possible, and the footrest is raised and lowered in conjunction with the ups and downs of the backrest,
An object of the present invention is to provide a chair structure that facilitates operability.

[0008]

That is, the chair structure of the present invention is a chair having a backrest portion which can be raised and lowered at a rear portion of a seat portion and a footrest which is pivotally attached to a front portion so as to be able to protrude and retract. The backrest portion of the chair is pivotally attached to the seat portion in a suspended manner, and the backrest portion and the footrest are connected in a linked manner, and the footrest is interlocked with the up-and-down swing of the backrest portion. Are configured to appear and disappear.

Further, according to the chair structure of the present invention, the backrest portion provided at the rear portion of the seat portion of the chair is pivotally attached to the suspension member at the rear portion of the seat portion, and the up / down member is connected to the suspension member. A footrest is pivotally attached to the front part, and a connecting member is interposed between the footrest and the backrest part. Are performed at the same time.

Further, the chair structure according to the present invention is characterized in that the upper portion of the backrest portion is slightly curved.

[0011]

The chair structure of the present invention has the following effects by being constructed as described above.

That is, according to the chair structure of the present invention, the backrest portion behind the seat portion is pivotally attached to the seat portion in a suspended manner, and the backrest portion and the footrest are connected in an interlocking manner. Because the footrest is moved in and out in conjunction with the up and down swing of the backrest, the backrest can be swung in the direction of the seat and fall down. There is no need to provide a large back space on the side, and the footrest can be automatically moved in and out in conjunction with the up-and-down movement of the backrest, thereby facilitating operability.

Further, in the chair structure of the present invention, the backrest portion provided behind the seat portion of the chair is connected to the hanging member of the seat portion so as to be pivotable by the raising and lowering member. The backrest portion can be raised and lowered and swung in the seat direction by pushing and pulling the raising and lowering member, and the space on the rear side of the backrest portion can be effectively used.

Further, in the chair structure of the present invention, since the upper portion of the backrest portion is formed to be curved inward, the backrest portion does not become a hindrance even if the height of the backrest portion is relatively high. The backrest portion can be stored below the seat portion by falling down of the portion.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The chair structure of the present invention will be described below in detail with reference to an embodiment shown in the drawings. FIG.
FIG. 2 is an explanatory view showing an embodiment in which the backrest portion of the chair structure according to the present invention is raised and the footrest is retracted, and FIG. FIG. 3 is an explanatory view showing an embodiment in a state in which the footrest is slightly protruded, and FIG. 3 is an embodiment in a state in which the backrest portion of the chair structure according to the present invention is completely lowered and the footrest is completely protruded. FIG.

That is, as shown in FIGS. 1 to 3, the chair structure of the present invention comprises a seat 2 erected at a predetermined height on a base 1 and a seat 2 provided behind the seat 2. Backrest 3
A suspending member 4 for pivotally attaching the backrest 3 to the seat 2 in a suspended manner.
An up-and-down member 5 connected to the backrest portion 3 so as to be able to push and pull in the direction of the seat portion 2; a footrest 6 pivotally attached at a front portion of the seat portion; The connecting member 7 is provided between the backrests 3.

The base 1 comprises a base 11 installed on a floor or the like as shown in the figure, and a support member 12 capable of holding the seat 2 at a predetermined height above the base 11. I have.

The seat 2 allows a user to sit on the seat 2. Although not shown, a cushioning member made of a material such as urethane or the like according to the necessity is arranged at an upper portion thereof.

In the embodiment, the backrest portion 3 is a frame member having an upper portion formed in a slightly curved shape so that the user can easily lean on the backrest portion. A cushioned member made of a material is provided.

By forming the upper portion of the backrest 3 as a slightly curved frame member as described above, it is possible to not only improve the user's feeling of use, but also to form the backrest 3 in such a shape. When swinging the seat back 3 in the seat direction, the lower part of the backrest 3 is parallel to the seat 2 so that it can be easily stored under the seat 2. Even if the height of the backrest 3 is relatively high, the curved portion can prevent the back side of the backrest 3 from being in the way as shown in FIG.

Further, on both sides of the rear portion of the frame member of the seat portion 2,
A pair of suspending members 4 for suspending the backrest portion 3 are respectively arranged in an upright state, and these two suspending members 4, 4 are provided.
Thereby, the backrest portion 3 can be raised and lowered in the seat direction.

The suspension member 4 is provided with an upright member 41 fixedly provided at a rear position of the seat portion 2, and an upper end of the upright member 41, which is pivotally mounted at an upper end thereof, and a lower end of which is a frame member of the backrest portion 3. The swing member 42 is fixed to both sides of the substantially central portion.

The undulating member 5 is formed of a material such as a hydraulic cylinder or an electric actuator that allows the end of the lot to expand and contract. In the embodiment, one end of the undulating member 5 such as an electric actuator is connected to the base. 1, the other end is pivotally mounted near the swinging member 42 of the backrest 3. The undulating member 5 is interposed between the base 1 and the backrest 3. The backrest part 3
Can be pushed and pulled in the seat 2 direction.

Although not shown, the footrest 6 is provided with a cushioned member made of a material such as urethane or the like according to the necessity. It is designed to be pivotally attached to the seat 2 so as to protrude and retract in front of the seat 2 as necessary, and to be used by placing the foot of the user with the footrest 6 protruding. So that people can relax.

The linking member 7 is interposed between the footrest 6 and the backrest 3, and moves the footrest 6 in conjunction with the swing of the backrest 3 by the undulating member 5. In this embodiment, the connecting member 7 is formed in a rod shape, one end of which is pivotally attached to the lower part of the backrest 3 and the other end of which is a foot. The backrest 3 and the footrest 6 are linked to each other by being pivotally fixed to the central lower surface of the platform 6.

Although not shown, the connecting member 7 is
It is not limited to the rod-shaped member, but may be any member as long as it can push and pull the footrest 6. For example, by using a bellows-shaped member, the backrest portion 3 can be used. The swinging distance of the footrest 6 can be changed, and adjustment according to the purpose of use can be performed.

Although the chair structure of the present invention has been described with respect to an example using a structure for a normal chair, the chair structure of the present invention can also be applied to a massage chair. When the mechanism is used for a massage chair with a built-in mechanism, the chair body can be installed and used even in a place close to a wall, and the range of use is further expanded.

In using the chair structure of the present invention configured as described above, the user normally sits down on the chair in the state shown in FIG. The backrest 3 starts to oscillate in the direction of being retracted in the direction of the seat 2, and in conjunction with this, the connecting member 7 moves the footrest 6.
2 can be slightly pushed out, as shown in FIG. 2, to make the backrest 3 slightly fall down and the footrest 6 to be slightly protruded.

By further operating and retracting the up-and-down member 5 from the state of FIG. 2, the backrest portion 3 continues to oscillate in the direction of being further retracted in the direction of the seat portion 2 and, in conjunction with this, the connecting member 7 Can be further pushed out and retracted to the state shown in FIG. 3 so that the backrest portion 3 can be completely laid down.

The undulating member 5 of the chair in the state shown in FIG.
The backrest 3
Starts standing and swinging in the direction of pushing out from the direction of the seat 2, and in conjunction with this, the connecting member 7 pulls in the footrest 6, and as shown in FIG. It can be returned to a state where it is slightly protruded.

Further, the undulating member 5 is continued from the state shown in FIG.
Is operated in reverse, and the backrest portion 3 is pushed out, so that the backrest portion 3 stands up and swings in the direction of further pushing out from the seat portion 2 direction, and in conjunction with this, the connecting member 7 pulls in the footrest 6,
As shown in FIG. 1, the backrest portion 3 can be returned to a completely upright state.

[0032]

According to the chair structure of the present invention, the backrest provided behind the seat of the chair is swung in the direction of the seat to be turned upside down. Considering the chair structure with the conventional reclining mechanism that needs to provide a considerably wide back space on the rear side in relation to the rear part, and considering the range where the seat moves forward, considerable space is also provided for the front part Unlike the chair structure provided with the seat slide mechanism that needs to be provided, there is no need to provide the rear space at the time of falling down or the space in front of the seat by sliding the seat according to the ups and downs of the backrest. The installation space of the main body can be reduced as much as possible, and the indoor space can be effectively used.

Further, according to the present invention, since the connecting member is interposed so that the backrest portion and the footrest are interlocked, the footrest is automatically moved in and out in conjunction with the up-and-down swing of the backrest portion. This eliminates the need to individually raise and lower the backrest portion and move the footrest up and down as in the conventional chair structure, thus facilitating operability.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment in a state where a backrest portion of a chair structure according to the present invention is raised and a footrest is retracted.

FIG. 2 is an explanatory view showing one embodiment of a state in which a backrest portion of a chair structure according to the present invention is slightly lowered and a footrest is slightly protruded.

FIG. 3 is an explanatory view showing one embodiment of a state in which the backrest portion of the chair structure according to the present invention is completely laid down and the footrest is completely protruded.

[Explanation of symbols]

 2 Seat 3 Backrest 4 Hanging member 5 Undulating member 6 Footrest 7 Linking member

Claims (3)

[Claims] A backrest that can be raised and lowered at a rear portion of the seat;
What is claimed is: 1. A chair provided with a footrest pivotally attached to a front part so that a backrest part of the chair can be pivotally attached to a seat part, and the backrest part and the footrest are linked. A chair structure characterized in that the footrests are connected to each other in such a manner that the footrests are protruded and retracted in conjunction with the swing of the backrest. 2. A backrest portion provided at a rear portion of a seat portion of a chair is pivotally attached to a suspension member at a rear portion of the seat portion, and a lifting member is connected to the suspension member, and a footrest is provided at a front portion of the seat portion. And a linking member is interposed between the footrest and the backrest to allow the backrest to swing up and down and the footrest to move in and out simultaneously by pushing and pulling the ups and downs member. Chair structure characterized by the following configuration. 3. The chair structure according to claim 1, wherein an upper portion of the backrest portion is slightly curved.