JP2002142895A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair which can assist a user with declining muscles to sit on and stand up. SOLUTION: This chair has the base body 1, a back rest 24 equipped rotatably in the longitudinal direction around the lower part as the supporting point to the rear end side of the base body 1, a seat body 11 positioned in front of the backrest and equipped rotatably on the base body in a direction the rear end side is raised and having arm rests 18 on both sides, and a drive shaft 35 and a drive source 34 to drive forward/rearward the drive shaft 35. A drive mechanism 40 to turn the seat body 11 in a direction the rear end side is raised by driving the drive shaft from the neutral position to the forward direction and to drive the backrest to be reclined by driving from the neutral position to the rearward direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair suitable for use by a person with reduced muscle strength in the legs and hips.

[0002]

2. Description of the Related Art It is not easy for a user with weak muscular strength to sit or stand on a chair, and assistance from an assistant may be necessary. However, when the caregiver raises or sits down on the user who has weak muscle strength of the legs and hips, the burden on the caregiver increases. Therefore, it is desired to reduce the burden on the caregiver.

In general, a chair has a seat for a user to sit on. This seat is usually provided substantially horizontally on the leg. Therefore, when sitting on the seat body,
Since the user has to lower the buttocks deeply to the height of the seat body, the operation places a heavy burden on the legs and hips.

[0004] When the user stands up, the user must lift the buttocks deeply lowered on the seat body, and also must extend the legs from the bent state, which places a greater burden on the user than sitting.

[0005] In order to reduce the burden on the caregiver when the user sits on a chair or stands up, a Japanese utility model 61-3
No. 401 proposes a chair. In this chair, the seat body is provided rotatably around the front end side,
The seat body is urged by a spring in a direction in which the rear end rises with the front end serving as a fulcrum.

The seat body can be held substantially horizontally against the urging force of the spring. Therefore, when the user sits down, the holding state of the seat body is released, and the seat body is inclined by the urging force of the spring. Thereby, the user can relatively easily sit down by slightly lowering the buttocks and hitting the above-mentioned seats, and when standing up, the buttocks are pushed up by the seats biased in the upward direction. Therefore, in this case, it is possible to stand up relatively easily.

[0007]

By the way, in the chair having the above structure, the seat body is urged in the rising direction by the urging force of the spring. Therefore, in order for the user to be able to stand up relatively easily, the urging force of the spring must be increased to push the buttocks of the user strongly. In addition, even when the user sits down, the urging force of the spring must be sufficiently increased to ensure that the user's buttocks can be received.

However, if the urging force of the spring is increased, the seat must be strongly pressed against the urging force of the spring by the buttocks when sitting down. May increase the burden on the user.

Further, if the holding state of the seat body is released when the user stands up, the buttocks of the user are strongly pushed up by the seat body in accordance with the urging force of the spring. In the case of, the stability when standing up due to swaying of the legs and the like may be deteriorated.

[0010] On the other hand, a so-called reclining chair is known, in which the upper body can be tilted backward and the legs can be held almost horizontally so that the user can relax while sitting. Convenient if a reclining chair is provided with a rotatable seat to reduce the burden on the user and caregiver when the user with low muscular strength stands or sits down However, such reclining chairs have not been developed.

According to the present invention, the user can sit and stand up relatively easily without strongly urging the seat body in the ascending direction by the spring, and furthermore, the user can easily move the upper body backwards. An object of the present invention is to provide a chair that can take a posture.

[0012]

According to the first aspect of the present invention, there is provided a base, a back body provided at the rear end side of the base so as to be pivotable in the front-rear direction with a lower portion serving as a fulcrum, and a back body provided in front of the back body. A seat that is provided rotatably in the direction in which the rear end side of the base body rises and has armrests on both sides; a drive shaft; and a drive source that drives the drive shaft forward and backward. By driving the shaft in the forward direction from the neutral position, the seat body is rotated in the direction in which the rear end side rises, and by driving the shaft in the backward direction from the neutral position, the back body is driven in the direction of falling down backward. A chair comprising a driving mechanism.

According to a second aspect of the present invention, there is provided a base, a back body provided at the rear end side of the base so as to be rotatable in the front-rear direction with a lower portion serving as a fulcrum, and a rear body located in front of the back body and attached to the base. A seat body provided rotatably in a direction in which the end side rises and armrests provided on both sides, a footrest body provided at the front end of the seat body rotatably with an upper portion as a fulcrum, and a drive A shaft and a drive source for driving the drive shaft forward and backward, and by driving the drive shaft from the neutral position in the forward direction, the seat body is rotated in a direction in which the rear end side rises. The lower part is rotated in the direction toward the rear end side of the base body by interlocking the footrest with the rotation of the base body, and the lower part of the footrest is lowered by driving the neutral part from the neutral position in the retreating direction and lowering the back part backward. And a drive mechanism for rotating in the ascending direction. There in a chair to be.

According to a third aspect of the present invention, the driving mechanism comprises: a rotating shaft provided at an upper portion of a front end side of the base so as to be rotatable along a width direction of the base; and a driving arm provided at the rotating shaft. A drive source in which the drive shaft is connected to the drive arm, and a direction in which a rear end side of the seat body rises when the rotation shaft is provided in the rotation shaft and is rotated in a predetermined direction by the drive source. A first foot link having one end connected to the rotation shaft, one end pivotally connected to the other end of the first foot link, and the other end pivotally connected to the footrest. A second foot-side link for driving the footrest in the ascending direction via the first foot-side link by the rotation of the rotation shaft when the rotation axis is rotated in a direction opposite to the predetermined direction by the drive source; Pivotally attached to the footrest and the other end of the back It is in the chair of claim 2, wherein the when the foot connector carrier provided pivotally driven in the upward direction at the end portions; and a coupling link for rotating the back body lodging direction.

According to a fourth aspect of the present invention, the drive mechanism rotates the rotary shaft in the predetermined direction by driving the drive shaft in a forward direction from a neutral position, and is driven in a backward direction from the neutral position. The chair according to claim 3, wherein the rotation shaft is configured to rotate in a direction opposite to the predetermined direction.

According to the present invention, since the seat is driven by the drive source of the drive mechanism, the seat can be reliably rotated at a predetermined speed, so that the user can sit in a stable state. The user can sit up and stand up, and the back body can be driven in the front-back direction, so that the seated user can take a comfortable posture in which the upper body is tilted backward.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The chair shown in FIGS. 1 and 2 has a base 1. The base 1 has a pair of leg members 3 connected in parallel at predetermined intervals by a lower connecting member 2 as shown in FIG. 3, and the height of the base 1 is adjusted on the lower surface of both ends of the leg member 3. An adjuster 4 is provided, and a roller 4 a for moving the base 1 is provided at both ends of the leg member 3. A frame 5 is erected on each leg member 3, and the upper front end and the rear end of the pair of left and right frame 5 are connected to each other by an upper connection member 6 having a rectangular cylindrical shape.

A pair of seat frame mounting pieces 7 are fixed upward on the upper surfaces of both ends of the upper connecting member 6, and a pair of supporters are provided on the inner surface at positions substantially corresponding to the seat mounting pieces 7. The piece 9 is fixed rearward.

The pair of seat frame mounting pieces 7 includes a seat body 11.
Are connected rotatably. That is, a pair of connecting pieces 13 are provided at the front end of the seat frame 12, and these connecting pieces 13 are rotatable by the screws 15 and the nuts 15a through the bush 14 on the seat frame attaching piece 7 as shown in FIG. Are linked.

At the rear ends of the lower surfaces on both sides of the seat frame 12, cushioning members 16 made of an elastic material such as rubber are provided. The cushioning member 16 comes into contact with the upper surface of the upper connecting member 6 provided at the upper rear end of the frame 5 when the seat frame 12 is in a substantially horizontal state. In addition, the seat body 1
1, a cushion body 1 is provided on the upper surface of the seat frame 12 as shown in FIG.
7 is provided.

An armrest 18 is provided on both sides of the seat frame 12 in the width direction.
Is provided. The armrest body 18 has an inverted U-shaped rod member 19 fixed to both ends of the seat frame 12 in the width direction, and a plate-like member fixed to the upper end of the rod member 19 along the front and rear direction of the seat frame 12. And the upper member 20 is curved upward and convexly.

A pair of connecting pieces 1 provided on the seat frame 12
3, both ends in the width direction of the upper end of a footrest frame 22 constituting the footrest 21 are pivotally mounted. The footrest frame 22 is connected to the base 1 so as to be rotatable in the front-rear direction with the upper end serving as a fulcrum. As shown in FIG. 1, the seat body 1 is
1 is provided with a cushion body 23 which is integrally continuous with the cushion body 17 provided in the first embodiment.

A lower end of a back frame 25 constituting a back body 24 is rotatably connected to an upper portion of the base 1 on the rear end side of the frame 5. That is, as shown in FIG.
One end of a short pipe 26 is fixed to the upper inner surface on the rear end side, and connecting pieces 27 are respectively provided on both sides of the lower end of the back frame 25 to protrude. The connecting piece 27 has a bush 2
8 is provided, and a screw 29 inserted through the bush 28 is provided.
Is screwed to a nut 30 fixed in the other end of the short pipe 26, whereby the back frame 25 is connected to the base 1 so as to be rotatable in the front-rear direction. The back body 24 is shown in FIG.
As shown in the figure, a cushion body 31 is provided on the back frame 25.

As shown in FIG. 3, both ends of the rotating shaft 32 are rotatably supported by a pair of supporting pieces 9 provided on the upper connecting member 6 on the front end side of the base 1. A pair of drive arms 33 are fixed at predetermined intervals in the middle of the rotating shaft 32. This drive arm 33 has the structure shown in FIG.
As shown in FIG. 7, the distal end of the drive shaft 35 of the drive source 34 is pivotally mounted. The drive source 34 is one element of the drive mechanism 40.

As shown in FIG. 1, the drive source 34 moves the drive shaft 35 from the neutral position shown in FIG. 7B by moving the motor 36 and the operation of the motor 36 as shown in FIG. And a power converter 37 driven to the retracted position shown in FIG. 7 (c). The drive source 34
The lower connecting member 2 on the rear end side of the base 1 as shown in FIG.
Are pivotally connected to a connecting piece 38 provided at the end of the vehicle.

As shown in FIG. 3, the base ends of the sitting arms 41 are fixed to both ends of the rotating shaft 32, respectively. As shown in FIG. 6, a support shaft 42 is provided at a distal end portion of the sitting arm 41, and a roller 43 is provided on the support shaft 42 so as to be rotatable and cannot be pulled out. Each roller 43 is configured to be in rolling contact with a pair of L-shaped members 44 provided along the front-rear direction at an intermediate portion in the width direction of the seat frame 12. That is, the drive shaft 35 of the drive source 34 is driven in the forward direction from the neutral position shown in FIGS. 1 and 7B,
When the rotation shaft 32 is rotated in a predetermined direction by the drive shaft 35 via the drive arm 33, the lift arm 41 is driven in a rising direction (clockwise direction indicated by an arrow in FIG. 1). 43, the seat frame 12, that is, the seat body 11 is connected to the seat mounting piece 7 as a fulcrum in a direction in which the rear end rises from the state shown in FIG. 7B as shown in FIG. It will be rotated.

As shown in FIG. 1 and FIG.
One end of the first foot link 45 is fixed to the middle part of the first link. One end of a second foot link 46 is pivotally connected to the other end of the first foot link 45. The other end of the second foot-side link 46 is pivotally connected to a first connecting piece 47 provided at an intermediate portion in the vertical direction at one widthwise end of the lower surface (back surface) of the footrest frame 22 of the footrest 21. Is being worn.

The footrest 21 is provided with a drive shaft 3 of a drive source 34.
When 5 is in the neutral position, it is suspended almost vertically as shown in FIGS. 1 and 7 (b). In this state, when the drive shaft 35 is driven in the forward direction as shown in FIG. 7A and the rotary shaft 32 rotates in a predetermined direction (clockwise) shown by an arrow in FIG. Second foot link 4
The lower end pivots toward the rear end of the base body 1 with the connecting portion with the connecting piece 13 provided on the seat frame 12 as a fulcrum by means of 5 and 46. At this time, as described above, the seat body 11 rotates in the direction in which the rear end rises with the front end as a fulcrum.

As shown in FIGS. 2 and 7 (c),
When the drive shaft 35 is driven in the backward direction from the neutral position, and the rotation shaft 32 is rotated in the counterclockwise direction, which is the opposite direction to the above-mentioned predetermined direction indicated by the arrow, the footrest 21 is moved forward with the upper end at the fulcrum. Rotate in the ascending direction. When the drive shaft 32 is driven in the backward direction from the neutral position in FIG. 1, the roller 43 provided on the sitting arm 41 separates from the L-shaped member 44 of the seat frame 12, but the seat body 11 is substantially horizontal. In this state, the cushioning material 16 provided at the rear end of the lower surface abuts on the upper surface of the upper connecting member 6, so that the rear end is prevented from further rotating in the downward direction. .

As shown in FIG. 4 and FIG.
A second connecting piece 48 is provided at the other end in the width direction of the lower surface (back surface) of the footrest frame 22 at an intermediate portion in the vertical direction.
One end of an interlocking link 49 is pivotally connected to the second connecting piece 48. The other end of the interlocking link 49 is connected to the back frame 2
5, a third connecting piece 51 provided at a lower half of the lower end in the width direction.
Is pivoted to.

As shown in FIG. 1, when the drive shaft 35 of the drive source 34 is in the neutral position, that is, when the footrest 21 is suspended almost vertically, the back body 24 is moved to the lower end portion pivotally supported by the connecting piece 27. Is held by the interlocking link 49 in a state where the upper end side is slightly inclined backward from the vertical state with the fulcrum as a fulcrum.

As shown in FIG. 7A, when the drive shaft 35 is driven in the forward direction and the footrest 21 rotates rearward with the upper end as a fulcrum, the back body 24 is interlocked with the rotation of the footrest 21. Since the lower end is pushed rearward by the interlocking link 49, the lower end pivots forward and pivots in an upright direction that is more vertical than the state shown in FIGS. 1 and 7B.

As shown in FIG. 7 (c), when the drive shaft 35 is driven in the retreating direction, the footrest 21 rotates in the direction in which the lower portion rises with the upper end as a fulcrum. The lower end is pulled forward by the interlocking link 49, and the upper end is rotated in the direction of falling backward.

The lifting arm 41, the first and second foot side links 45 and 46, and the interlocking link 49 are connected to the drive source 3
4 constitutes the driving mechanism 40 for driving the seat body 11, the footrest body 21, and the back body 24.

Next, a case where the chair having the above-described structure is used will be described.

When the user U who has weak muscular strength in the legs and hips is seated, the driving shaft 3 of the driving source 34 as shown in FIG.
5 is driven in the forward direction from the neutral position. Thereby,
The seat body 11 is tilted from the substantially horizontal state shown in FIG. 7B to the rear end side as shown in FIG. 7A, that is, is driven to rotate forward. Therefore, the user U can touch the seat body 11 without lowering the buttocks deeply.

After the buttocks have been brought into contact with the seat body 11, the drive shaft 35 is returned from the advanced position to the neutral position shown in FIG. Thereby, the seat body 11 is gradually rotated in the falling direction from the inclined state in accordance with the driving speed of the drive shaft 35, so that the user U can shift to the sitting posture while gently bending the legs. That is, the user U can shift from the standing posture to the sitting posture without putting a large burden on the legs and hips.

When the seat body 11 is raised in an inclined state, the armrest body 18 provided integrally with the seat body 11 together with the seat body 11 rotates forward. For this reason, when the user U applies his buttocks to the seat body 11, both hands can be easily put on the armrests 18. By holding the armrests 18 with both hands, the user U can securely support the body and put his buttocks on the seat body 11. After hitting 11, it is possible to shift from the standing posture to the sitting posture.

That is, the user U can easily hold the armrest body 18 with both hands by rotating the armrest body 18 integrally with the seat body 11, so that the user U can reduce the load on the body. It is possible to shift from the standing posture to the sitting posture.

With the user U sitting on the seat body 11,
When the drive shaft 35 of the drive source 34 is driven in the backward direction from the neutral position as shown in FIG. 7C, the rotation shaft 32 and the first,
From the state where the footrest 21 is suspended substantially vertically via the second foot-side links 45 and 46, the footrest 21 rotates in a direction in which the lower end rises.

When the footrest 21 rotates in the ascending direction, the lower end of the back body 24 is pulled forward by the interlocking link 49, so that the back body 24 rotates in the direction in which the upper side falls backward.

Accordingly, the user U seated on the seat body 11 is held by the footrest 21 with the legs lifted, and can lean on the back body 24 with the upper body folded backward. That is, the user U can take a comfortable posture in the sitting state.

On the other hand, in the state shown in FIG.
When the user U who is seated on the vehicle stands up, the drive shaft 35 of the drive source 34 is driven from the retracted position to the forward position shown in FIG. 7A through the neutral position shown in FIG. 7B.

When the drive shaft 35 returns from the retracted position to the neutral position, the footrest 21 hangs down substantially vertically, and the back body 24 pivots forward to a position where it falls slightly backward from the vertical state. In this state, the user U can put his foot on the floor.

Since the installation height of the seat body 11 can be adjusted by the adjuster 4, by adjusting the height, the user U can put his foot on the floor at the neutral position shown in FIG. You can make sure.

Next, the drive shaft 35 of the drive source 34 is
As shown in (a), it is driven in the forward direction from the neutral position.
Accordingly, the seat body 11 is rotated by a roller 43 provided on the sitting arm 41 in a direction in which the rear end side is raised with the front end side as a fulcrum, and the lower end of the footrest 21 is substantially perpendicular to the base 1. It rotates to enter backward.

When the seat body 11 is driven in the ascending direction, the user U sitting on the seat body 11 pushes the buttocks obliquely upward. Since the rotation of the seat body 11 in the ascending direction is gently rotated in the ascending direction in accordance with the driving speed of the drive shaft 35 of the drive source 34, the user U sits while gradually extending the bent leg. It is possible to shift from the posture to the standing posture. That is, since the user U can stand up gently and with the buttocks securely supported by the seat body 11, the user U does not exert a heavy load on the legs and hips.
You can stand up in a stable state.

Further, the user U is raised by raising the seat body 11.
When the robot stands up, the footrest 21 rotates in a direction in which the lower end enters the rear of the base 1. Therefore, when the user U stands up, the legs do not hit the footrest 21, so that even if the footrest 21 is provided, the user U can stand up in a stable state.

The drive shaft 35 of the drive source 34 is driven from the neutral position to the forward position or the retracted position, and the rotary shaft 32 is rotated in a predetermined direction, so that the seat member 11, the footrest member 21 and the back member 24 are rotated. Can be linked to each other in a predetermined state, or the foot rest 21 and the back body 24 can be linked to each other in a predetermined state. That is, since the seat body 11, the footrest body 21, and the back body 24 can be driven by a single driving source 34 in a predetermined interlocking relation, the configuration can be simplified and the cost can be reduced as compared with the case of driving using a plurality of driving sources. Reduction can be achieved.

The footrest 21 is rotatably connected to the front end of the seat 11. Therefore, since the cushion body 23 of the footrest 21 and the cushion body 17 of the seat body 11 can be integrated, the appearance is improved.

[0052]

According to the present invention, the seat body is driven by the drive source of the drive mechanism so that the seat can be turned from the down state to the upright state or from the upright state to the down state. .

[0053] Therefore, since the seat body can be surely rotated at a predetermined speed by the driving source, when the user stands up, the buttocks can be surely and gently pushed up in a stable state. At times, the buttocks may be applied to the seat body to allow the user to sit gently in a stable state together with the seat body. Moreover, since the back body can be driven in the front-rear direction, the user sitting on the seat body can take a comfortable posture in which the upper body is tilted backward.

An armrest is provided integrally with the seat body.
It rotates with the seat body. Therefore, when the user sits on the seat body in the upright state, the armrest that has been rotated together with the seat body can be easily held. It is possible to sit on the body with the hips.

[Brief description of the drawings]

FIG. 1 is a side view of a chair according to a first embodiment of the present invention, in which a drive shaft of a drive source is at a neutral position.

FIG. 2 is a side view of the chair in which a drive shaft of a drive source is at a retracted position.

FIG. 3 is a perspective view showing a driving mechanism provided on a base.

FIG. 4 is an enlarged cross-sectional view of a connection portion between a base and a back body.

FIG. 5 is an enlarged cross-sectional view of a connecting portion between the base and the seat body.

FIG. 6 is an enlarged view showing a seat body and a sitting arm for driving the seat body in a rising direction.

7 (a) to 7 (c) are explanatory views of chair use modes, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 11 ... Seat body 18 ... Armrest body 21 ... Footrest body 24 ... Back body 32 ... Rotating shaft 33 ... Drive arm 34 ... Drive source 35 ... Drive shaft 40 ... Drive mechanism 41 ... Lifting arm 45 ... First Foot side link 46: Second foot side link 49: Interlocking link 61: First drive link 62: Second drive link

Claims (4)

[Claims] 1. A base, a back body provided at a rear end side of the base so as to be rotatable in a front-rear direction with a lower portion serving as a fulcrum, and a direction in which a rear end side is located in front of the back body and rises toward the base. A drive shaft and a drive source for driving the drive shaft to move forward and backward, and the drive shaft is driven in a forward direction from a neutral position. And a drive mechanism for rotating the seat body in a direction in which the rear end side rises, and driving the back body in the direction of falling down rearward by driving the seat body backward from the neutral position. Chair. 2. A base body, a back body provided at the rear end side of the base body so as to be rotatable in the front-rear direction with a lower portion serving as a fulcrum, and a direction in which the rear end side is located in front of the back body and rises toward the base body. A seat body rotatably provided with armrests on both sides, a footrest body rotatably provided at the front end of the seat body with the upper part as a fulcrum, a drive shaft and this drive shaft Having a drive source for driving the advancing and retreating, and by driving this drive shaft from the neutral position in the forward direction, the seat body is rotated in a direction in which the rear end side rises,
By linking the footrest with the rotation of the seat, the lower part is rotated in the direction toward the rear end of the base, and the lower part is driven backward from the neutral position so that the back body falls down and the foot is lowered. A chair comprising: a driving mechanism for rotating a mounting body in a direction in which a lower part is lifted. 3. The drive mechanism includes: a rotation shaft provided on an upper portion of a front end side of the base so as to be rotatable along a width direction of the base; a drive arm provided on the rotation shaft; A drive source connected to the drive shaft, and a lifting arm provided on the rotary shaft, which pushes up the seat body in a direction in which a rear end of the rotary shaft is raised when the rotary shaft is rotated in a predetermined direction by the drive source. A first foot link having one end connected to the rotation shaft; one end pivotally connected to the other end of the first foot link and the other end pivotally connected to the footrest, and the rotation shaft being A second foot-side link for driving the footrest in the ascending direction via the first foot-side link by the rotation when rotated in a direction opposite to the predetermined direction by a drive source; Pivot and the other end to the lower end of the back body Claim 2 chair according to provided, characterized by comprising a coupling link to be rotated in a direction to fall down the dorsal backward when driving the foot connector carrier in the upward direction Te. 4. The driving mechanism rotates the rotating shaft in the predetermined direction by driving the driving shaft in a forward direction from a neutral position, and drives the rotating shaft in a retreating direction from a neutral position by driving the rotating shaft in a retreating direction. 4. The chair according to claim 3, wherein the chair is rotated in a direction opposite to the predetermined direction.