JP2002345598A - Arm rest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability and ease of handling for persons with one hand or arm disabled while achieving higher operability of arm rest members. SOLUTION: Arm parts 5a of a pair of arm rest members 5 are pivoted near both end parts of rotatable rod members 4 arranged on the back of a back rest part 2 while being linked through link rods 7. At the same time, the pair of arm rest members is positioned behind the back rest part while being housed. The pair of arm rest members can be arranged at the roughly vertical position of keeping it housed as located behind the back rest part and at the roughly horizontal position that allows resting of arms.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armrest device provided on a backrest of various chairs such as a chair, a chair and a wheelchair.

[0002]

2. Description of the Related Art Conventionally, armrest devices provided on both sides of a backrest portion of a chair are known, and an armrest portion of the armrest device can be directly moved forward from a substantially vertical position in a stored state. By rotating to a substantially horizontal position, the user can place the elbow on the elbow rest.

[0003]

In the conventional armrest device, the two armrests provided on both sides of the backrest are separately provided in a substantially vertical position in a stored state and a substantially horizontal position in which the armrest can be applied. The rotation between the armrests has to be performed twice each time since the rotation of the armrests is required. There was a problem that was bad. In particular, the workability is particularly bad for people with one hand or arm that is disabled,
There was a problem that the usability was poor.

Further, in the conventional armrest device, since the armrests are provided on both sides of the backrest, there is a problem that the width of the entire chair becomes large. An increase in the width of the chair as a whole is a serious problem, particularly in a wheelchair or the like, because its mobility is impaired.

An object of the present invention is to solve the problems of the above-mentioned conventional armrest device.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention firstly provides a pair of elbows near both ends of a rotatable rod member disposed on the back of a backrest. The arm portion of the contact member is pivotally supported, and the arm portions of the pair of arm contact members are connected via a connecting rod. In the state where the pair of arm contact members are stored, the arm contact member is provided with a backrest portion. Secondly, a rotation restricting means for restricting further downward rotation of the elbow rest member from the substantially horizontal position is provided. Is provided with horizontal movement restricting means for restricting the movement of the elbow rest member disposed at a substantially horizontal position to the outside of the elbow rest.

[0007]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments unless it departs from the gist of the present invention.

Reference numeral 1 denotes a seat portion of various chairs such as a chair, a seat chair, and a wheelchair. Reference numeral 2 denotes a backrest portion provided on the seat portion 1, and a backrest portion 2 is provided on the seat portion 1. On the other hand, even if the position is fixed,
However, it may be arranged so as to be reclineable with respect to the seat 1. FIG. 1 shows, as an example, a backrest portion 2 including a suitable cushion 2a and a substrate 2b formed of a suitable hard plate material such as a metal plate, a wooden plate material, or a hard synthetic resin plate material. Of course, it may be constituted only by the substrate 2b.

Reference numeral 3 denotes a pair of plate-like support members which are attached to the lower part of the back surface of the substrate 2b of the backrest 2 at appropriate intervals and horizontally. A shaft hole 3a is formed. Reference numeral 4 denotes a rod member made of a pipe or the like inserted into the shaft hole 3a of the support member 3, and the rod member 4 is regulated so as not to move in the axial direction of the rod member 4 (the left-right direction in FIG. 1). It is supported by the support member 3 so that only rotation is possible,
In addition, the width of the backrest 2 is shorter than the width of the backrest 2.

Reference numeral 5 denotes a pair of elbow rest members comprising an arm part 5a formed of a metal bar or pipe and an elbow rest part 5b attached to the tip of the arm part 5a. In the vicinity of the end of the arm portion 5a, the rod member 4 located outside the support member 3 can be turned around the shaft support member 6 by an appropriate shaft support member 6 such as a bolt, a screw or a pin. Is pivoted to. Reference numeral 7 denotes a connecting rod made of a suitable hard material such as a metal pipe or a metal rod for connecting the arm portions 5a of the pair of armrest members 5, and one end of the connecting rod 7 The arm 5a of one of the arm rests 5 located on the side (the arm rest located on the left side in the figure) is pivotally attached to an arm 5a by a suitable shaft support member 8 such as a bolt, a screw, or a pin. The other end of the connecting rod 7 is connected to the arm 5a of the other elbow rest member 5 (elbow rest member located on the right side in the figure) located between the elbow rest part 5b and the shaft support member 6. Similarly, it is pivotally connected by a suitable shaft support member 8.

Reference numeral 9 denotes an arm 5a of one of the arm rests 5 (an elbow rest located on the left side in the figure) located between the arm rest 5b and the shaft support member 6, and the arm 5a side. And a tension spring that is stretched between the support member 3 and the other armrest member 5 (elbow rest member located on the left side in the figure) in the direction of the center of the backrest 2. The other elbow rest member 5 (the elbow rest member located on the right side in the figure) is connected to the backrest 2 via the connecting rod 7 by the urging force of the pulling pull 9. It is urged to rotate toward the center.

Reference numeral 10 denotes a horizontal movement restricting piece made of a pin or a plate attached to an appropriate portion of the connecting rod 7.
Is attached substantially perpendicularly to the longitudinal direction of the
As shown in FIG. 1, in a state where the pair of armrest members 5 are hidden behind the backrest portion 2 (the stored state of the armrest member 5), the pair of armrest members 5 are substantially parallel to the backrest portion 2. It is attached to become. Numeral 11 denotes a horizontal movement restricting member composed of a suitable pair of blocks 11a, such as a column or a prism, attached to the substrate 2b of the backrest 2 at intervals so that the horizontal movement restricting pieces 10 can be inserted. As shown in FIG. 1, the horizontal movement restricting piece 10 attached to the connecting rod 7 is in a housed state in which the pair of armrest members 5 are hidden behind the backrest 2 as shown in FIG. 1.
Is a pair of blocks 1 constituting the horizontal movement regulating member 11.
Although not inserted between 1a, as shown in FIGS. 3 and 4, the pair of elbow rest members 5 are attached to the connecting rod 7 in a state where the elbow rest is substantially horizontal. The horizontal movement restricting piece 10 is configured to be inserted between a pair of blocks 11 a constituting the horizontal movement restricting member 11.

Reference numeral 12 denotes a rotation restricting piece made of a pin or a plate attached to a rod member 4 located near one of the support members 3 attached to the backrest 2, and is provided in the longitudinal direction of the rod member 4. On the other hand, it is attached almost vertically. 13a, 1
Reference numeral 3b denotes a pair of pins attached to the side surface of the support member 3 on the side of the rotation restricting piece 12 at a predetermined interval, and the rotation restricting member 13 is constituted by the pair of pins 13a and 13b. I have. As shown in FIG. 1, the pair of armrest members 5 are attached to the rod member 4 in a state where they are hidden behind the backrest 2 (the stored state of the armrest members 5). The rotation restricting piece 11 is rotated by the rotation restricting member 13.
Of the pair of pins 13a, 13b, which is farther from the backrest 2, so that the elbow rest member 5 does not rotate more than necessary in the direction away from the backrest 2. It is configured. In addition, as shown in FIGS. 3 and 4, when the pair of elbow rest members 5 can be applied to a substantially horizontal elbow rest, the rotation restricting piece 12 attached to the rod member 4 does not support the backrest. Pin 13a closer to part 2
, So that the armrest member 5 does not rotate downward beyond a substantially horizontal state where the armrest can be applied.

As shown in FIG. 1, when the pair of arm rests 5 are stored so as to be hidden behind the backrest 2, the pair of arm rests 5 are stored. As described above, due to the urging force of the tension spring 9 stretched between the arm 5a of the elbow rest member 5 located on the left side and the support member 3 located on the side of the arm 5a, they approach each other. And the pair of elbow rest members 5 are configured not to protrude outward from behind the backrest 2.

A pair of armrest members 5 shown in FIG.
However, from the stored state of the elbow rest member 5 located behind the back rest part 2, one of the elbow rest members 5 comes out from behind the back rest part 2 against the urging force of the extension spring 9. When rotated in the direction, one of the elbow rest members 5
Then, the other elbow rest member 5 connected by the connecting rod 7 also rotates from the position hidden behind the backrest 2 in a direction to come out from behind the backrest 2. That is, when only one of the elbow rest members 5 is held in the hand and rotated in the direction away from the backrest 2, the other elbow rest member 5 also pivots in the direction away from the backrest 2, and the pair of elbows 5 As shown in FIG. 2, the abutment member 5 is almost in a state of protruding from behind the backrest 2.

Next, when one of the arm rests 5 is rotated in a horizontal direction from a substantially vertical state, the arm rests 5
Since it is pivotally attached to the rod member 4 by the shaft support member 6,
The rod member 4 rotates. Due to the rotation of the rod member 4, the other elbow rest member 5 pivotally attached to the rod member 4 by the pivotal support member 6 also follows the rotation of the one elbow rest member 5 in the horizontal direction. Rotate. When the pair of elbow rest members 5 are in a substantially horizontal state, the rotation restricting piece 12 attached to the rod member 4 is out of the pair of pins 13a and 13b constituting the rotation restricting member 13. The abutment member 5 is configured to abut the pin 13a closer to the backrest portion 2 so that the elbow rest member 5 does not rotate downward beyond a substantially horizontal state where the elbow rest can be applied.

At the time when the pair of arm rests 5 is substantially horizontal, for example, in FIG. 3 or FIG. 4, the elbow rest 5b of one of the left arm rests 5 is moved outward. Even if the end of the arm 5a rotates toward the center of the backrest 2 to move the connecting rod 7 rightward, the horizontal movement attached to the connecting rod 7 is attempted. Since the restricting piece 10 is inserted between the pair of blocks 11a constituting the horizontal movement restricting member 11, the connecting rod 7 is restricted from moving in the right direction, and therefore, the pair of elbow rest members in a substantially horizontal state. The horizontal movement of the elbow rests 5b in the directions away from each other is prevented.

The pair of elbow rests 5 shown in FIGS. 3 and 4 can be stored in a substantially vertical state from a state in which the pair of elbow rests 5 can be placed substantially horizontally. In order to return to the state, if one of the substantially horizontal elbow rest members 5 is set up substantially vertically, as described above, the one elbow rest member 5 follows the rotation in the vertical direction, and the other elbow rest member 5 follows. The elbow rest member 5 also rotates in the vertical direction. The pair of armrest members 5
As shown in FIG. 2, when the pair of armrests 5 is substantially vertical, the pair of elbow rests 5 is connected to the arm 5 a of the armrest 5 located on the left side and the support member 3 located on the side of the arm 5 a. Since the springs 9 are urged in the direction approaching each other by the urging force of the tension spring 9 stretched therebetween, they naturally rotate in the direction approaching each other, and as shown in FIG. 2 will be stored behind.

As described above, the arm portions 5a of the pair of elbow rest members 5 are pivotally supported near both ends of the rotatable rod member 4 disposed on the back of the backrest 2, and the pair of elbow members 5 The arm 5a of the contact member 5 is connected via a connecting rod 7,
And, in the stored state of the pair of elbow rest members 5,
Since the armrest member 5 is located behind the backrest 2, the operation of one of the armrest members 5 allows the pair of armrest members 5 to be substantially retracted from the backrest portion 2. It can be arranged in a vertical position and a substantially horizontal position where it can be applied to an elbow. Accordingly, the operability of the elbow rest member 5 is improved, and the operability and usability of a person with one hand or arm are disabled are improved.

When the arm rest 5 is stored, the width of the entire chair is reduced because the pair of arm rests 5 are located behind the backrest 2. Therefore, mobility of a wheelchair or the like is improved.

The rod member 4 located near one of the support members 3 attached to the backrest 2 serving as a rotation restricting means for restricting further rotation of the elbow rest member 5 from the substantially horizontal position to the downward direction. Attached rotation restricting piece 12 and rotation restricting piece 12
Rotation restricting member 1 comprising a pair of pins 13a and 13b attached to the side surface of the side support member 3 at a predetermined interval.
3 is provided, so that the elbow rest member 5 is surely
It can be maintained in a substantially horizontal position where the elbow can be applied.

A horizontal movement restricting piece 10 and a horizontal movement restrictor attached to an appropriate position of a connecting rod 7 as horizontal movement restricting means for restricting the outward rotation of the elbow rest member 5 disposed at a substantially horizontal position. Since the horizontal movement restricting member 11 composed of a pair of blocks 11a attached to the substrate 2b of the backrest 2 is disposed at an interval at which the pieces 10 can be inserted, the elbow rest member 5 can be securely mounted. Horizontal movement of the elbow rest 5b can be prevented.

FIG. 5 shows another embodiment of the armrest device of the present invention.

In this embodiment,. At the middle of the rod member 4 is attached a lever 15 whose center is pivotally supported by a pin 14. Then, one end of the lever 15 (the lower end in FIG. 5), the elbow rest 5b of the one elbow rest 5 (the left elbow rest in FIG. 5) and the shaft support The arm 5a located between the member 6 and the arm 6 is connected by a first split connecting rod 7A. Similarly, the other end (the upper end in FIG. 4) of the lever 15 and the elbow rest 5b of the other elbow rest 5 (the right elbow rest in FIG. 5) The arm portion 5a located between the shaft support member 6 and the shaft support member 6 is connected by a second divided connecting rod 7B similar to the first divided connecting rod 7A.

As shown in FIG. 5, the lever 15 is substantially parallel to the backrest 2 when the pair of elbow rests 5 is stored behind the backrest 2. In addition, the horizontal movement restricting member 1 in the above-described embodiment.
The pair of blocks 11a that constitute the first lever 1 are arranged at intervals so that the ends of the lever 15 can be inserted. In the embodiment shown in FIG. 5, the horizontal movement restricting piece 10 in the above-described embodiment is used. Is omitted, and the lever 15 is
Also serves as the horizontal movement restricting piece 10 in the embodiment described above. Other components are the same as those in the above-described embodiment, and a detailed description thereof will be omitted.

From the state in which the pair of elbow rest members 5 shown in FIG. 5 are stored behind the backrest 2, one of the elbow rest members 5 (for example, the elbow rest member located on the left side in FIG. 5). ) Is rotated in the direction of coming out from behind the backrest 2 against the urging force of the tension spring 9,
The first split connecting rod 7A also moves outward (to the left), and the lever 15 rotates clockwise in FIG. Lever 1
5 rotates clockwise, the second divided connecting rod 7B
After moving outward (to the right), the other elbow rest member 5 (the elbow rest member located on the right side in FIG. 5) follows the rotation of the one elbow rest member 5 and moves behind the backrest 2. Rotate out of the direction. Next, similarly to the above-described embodiment, when one of the elbow rest members 5 is rotated in the horizontal direction from a substantially vertical state, the elbow rest members 5 are pivotally supported by the rod members 4 by the shaft support members 6. Therefore, the rod member 4 rotates. Due to the rotation of the rod member 4, the other elbow rest member 5 pivotally supported by the rod member 4 by the shaft support member 6 also follows the rotation of the one elbow rest member 5 in the horizontal direction. Rotate.

When the pair of elbow rest members 5 are substantially horizontal, the rotation restricting piece 12 attached to the rod member 4 is turned into the rotation restricting member 13 similarly to the above-described embodiment.
Abuts on the pin 13a closer to the backrest 2 of the pair of pins 13a, 13b,
It is configured so that it does not rotate downward beyond a substantially horizontal position where it can be applied to the elbow. Further, when the pair of elbow rest members 5 are in a substantially horizontal state, the end of the lever 15 is inserted between the pair of blocks 11a constituting the horizontal movement restricting member 11. Similarly, the horizontal movement of the elbow rest members 5 to the outside of the elbow rest portions 5b is suppressed, and the elbow rest portions 5b of the pair of substantially elbow rest members 5 move horizontally in directions away from each other. Is configured to be blocked.

The embodiment shown in FIG. 6 corresponds to FIGS.
The configuration of the connecting rod 7 is different from that of the embodiment described using FIG. In this embodiment, the connecting rod 7C includes a straight portion 7a, a vertical portion 7b extending substantially perpendicularly to the straight portion 7a from one end of the straight portion 7a, and a linear portion 7a extending from the other end of the straight portion 7a. 7a and substantially perpendicular to the vertical portion 7a.
a first engaging portion 7c extending in a direction orthogonal to the first engaging portion 7b, and a second engaging portion extending substantially parallel to the first engaging portion 7c from an end of the vertical portion 7b. 7d. The connecting rod 7C having such a configuration is formed by bending a metal pipe, a metal rod, or the like. Further, at an appropriate position of the linear portion 7a of the connecting rod 7C, the horizontal movement restricting piece 10 in the embodiment described with reference to FIGS. 1 to 4 is provided with the first engagement portion 7c and the second engagement portion 7d. It is attached to an appropriate portion of the linear portion 7a so as to be substantially parallel and positioned in the same direction as the first engaging portion 7c and the second engaging portion 7d with respect to the linear portion 7a.

The first engaging portion 7c (the engaging portion located on the right side in FIG. 6) of the connecting rod 7C having the above-described configuration is located between the elbow rest portion 5b and the shaft support member 6. The arm 5a is inserted into the hole 5a1 formed in the arm 5a of the armrest member 5 (the armrest member located on the right side in FIG. 6), and the second engagement portion 7d of the connecting rod 7C (located on the left side in FIG. 6). Is inserted into a hole 5a1 formed in the arm portion 5a of the elbow rest member 5 (the elbow rest member located on the right side in FIG. 6) located on the distal end side of the pivot support member 6. The arm 5a of the pair of armrest members 5 is connected to the connecting rod 7C.
It is comprised so that it may connect.

As shown in FIG. 1, when the pair of elbow rest members 5 are located behind the backrest 2, the connecting rod 7C has the vertical portion 7b substantially standing upright. In this state, the horizontal movement restricting piece 10 attached to the linear portion 7a of the connecting rod 7C protrudes from between the pair of blocks 11a constituting the horizontal movement restricting member 11. From this state, similarly to the above-described embodiment, one of the elbow rest members 5
Is rotated in a direction of coming out of the back of the backrest 2 against the urging force of the tension spring 9, and the one armrest member 5 is connected to the other armrest member 5 connected by the connecting rod 7 </ b> C. Also rotates from a position hidden behind the backrest 2 in a direction to come out from behind the backrest 2. When one of the elbow rest members 5 is rotated substantially horizontally from a substantially vertical state in a state where the pair of elbow rest members 5 are almost out of the back of the backrest 2, the other elbow rest members 5 are also substantially rotated. It turns from the vertical state to the horizontal direction. Then, with the rotation of the pair of elbow rest members 5 in the horizontal direction, the vertical portion 7b of the connecting rod 7C also rotates in the horizontal direction, and the horizontal rotation causes the linear portion 7a of the connecting rod 7C to rotate. The attached horizontal movement restricting piece 10 is inserted from above from between a pair of blocks 11 a constituting the horizontal movement restricting member 11.
With such a configuration, as an example, as shown in FIG. 6 and the like, when the block 11a is formed as a column, the horizontal movement restricting piece 1 also has a columnar shape.
When 0 is inserted between the blocks 11a, the axis of the columnar horizontal movement restricting piece 10 is also orthogonal to the axis of the columnar block 11a. Therefore,
Even when forces in directions away from each other act on the armrests 5b of the pair of armrests 5, the axis of the cylindrical block 11a and the axis of the cylindrical horizontal movement restricting piece 10 shown in FIG. The occurrence of troubles such as the horizontal movement restricting piece 10 coming out of the space between the pair of blocks 11a constituting the horizontal movement restricting member 11 is smaller than in the case where the horizontal movement restricting pieces 11 are parallel.

FIG. 7 shows a case where the armrest device having the above-described configuration is applied to a wheelchair C, and the wheelchair C has a substantially U-shaped plane when the chair portion c1 of the wheelchair C is flat. An example is shown in which the bed member b1 is configured to be inserted into the concave portion b2. Chair part c1
In a state where is flat, the wheelchair C is moved to the bed member b1.
7A, the upper surface can form a substantially flat bed B, as shown in FIG. 7A, and as shown in FIG. 7B. Next, the backrest 2 is raised with respect to the seat 1 of the wheelchair C, and then the elbow rest member 5 is moved from behind the backrest 2 as described above, thereby obtaining the state shown in FIG. The armrest 5b of the armrest 5 can be a horizontal wheelchair C as shown. Normally, since the armrest 5b of the armrest 5 is made of a synthetic resin, when the armrest 5 is arranged on both sides of the backrest 2 as in a conventional armrest device, When the chair portion c1 is flattened and inserted into the concave portion b2 of the bed member b1, the hard elbow rest member 5 is located on the upper surface of the bed B, which makes sleeping uncomfortable and dangerous. . However, in the armrest device of the present invention, since the armrest member 5 is completely stored behind the backrest 2,
The stiff elbow rest 5 does not protrude from the upper surface of the bed B, so that a comfortable, non-hazardous bed B can be constructed.

Since the present invention is configured as described above, the following effects can be obtained.

Arms of a pair of armrests are pivotally supported near both ends of a rotatable rod member disposed on the back of the backrest, and a connecting rod is connected to the arms of the pair of armrests. And the pair of elbow rest members are stored in the retracted state of the pair of elbow rest members, so that the elbow rest member is located behind the backrest. The member can be arranged at a substantially vertical position in a stored state located behind the backrest portion and at a substantially horizontal position at which the elbow can be applied. Therefore, the operability of the elbow rest member is improved, and the workability and usability of a person with one hand or arm are disabled.

Since the rotation restricting means for restricting the rotation of the elbow rest member from the substantially horizontal position further downward is provided, the elbow rest member can be reliably moved to an appropriate substantially horizontal position where the elbow rest can be applied. Therefore, the user can maintain a stable posture.

Since the horizontal movement restricting means for restricting the movement of the elbow rest to the outer side of the elbow rest disposed at the substantially horizontal position is provided, the horizontal movement of the elbow rest can be reliably prevented. Therefore, a stable posture of the user can be maintained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which an armrest member of an armrest device of the present invention is stored.

FIG. 2 is a perspective view of the armrest device of the present invention in a state in which an armrest comes out of a backrest.

FIG. 3 is a perspective view of the armrest device of the present invention in which an armrest member is substantially horizontal.

FIG. 4 is a partially enlarged perspective view of the armrest device of the present invention, in which an armrest member is substantially horizontal.

FIG. 5 is a perspective view showing a state in which an armrest member of an armrest device according to another embodiment of the present invention is housed.

FIG. 6 is a partially enlarged perspective view of an armrest device of still another embodiment of the present invention in which an armrest member is substantially horizontal.

FIG. 7 is a perspective view showing an example of application of the armrest device of the present invention.

[Explanation of symbols]

 1 ... seat 2 ... backrest 4 ... rod Member 5 Elbow rest member 7 Connecting rod 10 Horizontal movement restricting piece 11 Horizontal movement restricting member 12 Rotation restricting piece 13 .... Rotation regulating members

Claims (3)

[Claims] An arm of a pair of armrests is pivotally supported near both ends of a rotatable rod member disposed on the back of a backrest, and the arms of the pair of armrests are connected to each other. An armrest device which is connected via a rod, and wherein the armrest member is located behind a backrest when the pair of armrest members are housed. 2. The armrest device according to claim 1, further comprising a rotation restricting means for restricting further rotation of the armrest from a substantially horizontal position downward. 3. The apparatus according to claim 1, further comprising a horizontal movement restricting means for restricting a movement of the elbow rest member disposed at a substantially horizontal position to the outside of the elbow rest. An armrest device as described.