JP2000060995A - Chair with stretching function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a user stretchable the back by providing a seat part with a rotatable backrest, and pressing the backrest part forward with respect to the seat part to be tilted. SOLUTION: An air bag 21 extended from the position of the waist to the position of the shoulder is provided vertically at the center of a backrest part 12. Air bags 22, 23 sandwiching the waist from both sides to support the waist when they are expanded are provided on both sides of the lower part. Handles 25, 26 for stretching are provided on both sides of the upper part of the backrest 12 in such a manner as to be fixed to the frame of the backrest part 12. The outside surface of an armrest 14 is provided with an operation part 35 having various switches such an upper half body stretch switch, a leg stretch switch, a bending forward stretch switch and the like. The air bags 21-23, 29 corresponding to the stretch are expanded to turn on the stretch switch, and the handle 25 for stretch is gripped to tilt forward the backrest part 12. Thus, desired stretch motion can be done.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair with a stretch function provided with a seat portion and a backrest portion rotatable with respect to the seat portion.

[0002]

2. Description of the Related Art Conventionally, a chair having a seat portion and a backrest portion rotatable with respect to the seat portion has been known.

In such a chair, since the backrest portion can be tilted by rotating the backrest portion rearward with respect to the seat portion, the backrest portion can be stretched by tilting the backrest portion backward while extending the spine. be able to. Such stretching can be easily performed with relatively little force. But,
When bending forward, greater force is required because the spine is on the back side.

[0004]

However, in the conventional chair, since the backrest portion is simply rotatable, the backrest portion cannot be forcibly bent forward to perform stretching. It was

The present invention has been made in view of the above circumstances, and an object thereof is to provide a chair with a stretch function capable of forcibly bending forward and stretching by the backrest portion.

[0006]

In order to achieve the above-mentioned object, the invention of claim 1 is a chair with a stretch function, comprising a seat portion and a backrest portion rotatable with respect to the seat portion. In addition, a forward bending means for pushing the backrest portion to the front side with respect to the seat portion and tilting the backrest portion is provided.

According to a second aspect of the present invention, a support portion for supporting the foot is provided at a lower position of the seat portion so as to be rotatable around an upper position of the support portion as a rotation fulcrum, and the support portion is provided on the backrest portion. It is characterized in that it is lifted forward by rotating in conjunction with tilting.

According to a third aspect of the present invention, a pair of the supporting portions is provided exclusively for the left and right legs, and the supporting portions rotate independently.

The invention of claim 4 is characterized in that the supporting portion can be housed in a state of being along the lower surface of the seat portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a chair with a stretch function according to the present invention will be described below with reference to the drawings.

A chair 10 with a stretch function shown in FIG.
Is a seat portion 11, a backrest portion 12, a pair of armrests 14,
A chair 16 having 15 and airbags 20 to 23,
And an air supply / exhaust device 40 (see FIG. 3).

The seat portion 11 and the backrest portion 12 are provided with a main body (not shown) holding a cushion of sponge rubber or the like on the frames 70 and 80 shown in FIG.
It is covered with (not shown).

The frame 70 of the backrest 12 includes a pair of side frames 71, 71 extending in the front-rear direction, and a columnar horizontal member 72 rotatably attached to the front side between the side frames 71, 71.
And a columnar support member 73 and the like rotatably attached to the rear side between the side frames 71, 71.

The horizontal member 72 has support rods 18 extending downward.
The support bar 18 is provided with a support bar 19 as a support portion extending to the left and right. The support bar 19 is moved to the arrow P by the rotation of the horizontal member 72.
It is designed to move in the P1 direction. Horizontal member 72
Is biased counterclockwise (in FIG. 2) by a spring (not shown).

The horizontal member 72 is provided with a hole 72A, through which the wire 74 passes through the support rod 18 to reach the support bar 19, and one end of the wire 74 is fixed in the support bar 19. ing. The other end of the wire 74 is wound around a winding roller (not shown) provided in the box 75. The winding roller is rotated by the motor 30 (see FIG. 3) to wind the wire 74, As the wire 74 is wound up by the roller, the support bar 19 and the horizontal member 72 resist the urging force of the spring and move toward the arrow P.
It is designed to rotate in one direction. Further, when the motor 30 is rotated in the reverse direction, the horizontal member 72 and the supporting bar 19 are rotated in the direction of arrow P2 by the spring, and the supporting bar 19 is moved to the seat portion 1 as shown by the chain double-dashed line in FIG.
It is designed to be stored along the lower surface of 1.

The box 75 is attached to a horizontal frame member 76 provided between the side frames 71, 71.

The support member 73 has a backrest 12 extending upward.
The frame 80 is attached, and the backrest portion 12 is rotated with respect to the seat portion 11 by the rotation of the support member 73. Further, the support member 73 is provided with a fixing member 81 protruding downward, and one end of a connecting member 82 is rotatably attached to the lower end of the fixing member 81. The other end of the connecting member 82 has an air bag (forward bending means) 29.
Is rotatably attached to an end plate 84 provided at one end of the. An end plate 85 provided at the other end of the airbag 29 is fixed to a fixing member 86 protruding rearward from the horizontal frame member 76.

The airbag 29 expands and contracts in the front-rear direction. Due to the expansion and contraction, the support member 73 rotates and the backrest 12 rotates with respect to the seat 11 to front and rear sides. Lean toward.

As shown in FIG. 1, the seat portion 11 is provided with an airbag 20 which extends in the left-right direction at a lower position and a front position of the cover.

An air bag 21 extending in the vertical direction is provided at the center of the backrest portion 12, and a pair of air bags 22, 23 are provided on both sides of the lower portion of the backrest portion 12.
These airbags 21 to 23 are covered with a cover (not shown). The airbag 21 extends from the waist position to the shoulder position along the spine. Airbag 2
When 2,23 are inflated, they sandwich the waist from both sides to support the waist.

A pair of stretching handles 25 and 26 are provided on both sides of the upper part of the backrest 12.
The stretch handles 25 and 26 are fixed to the frame 80 of the backrest 12.

An operating portion 35 is provided on the outer surface of the armrest 14.
As shown in FIG. 3, the operating section 35 is provided with an upper body stretch switch S1, a leg stretch switch S2, a forward bending stretch switch S3, a waist up switch S4, and a waist down switch S5. , A storage switch S6, and an on / off switch S7 for power supply.

When the upper body stretch switch S1 is operated, the airbag 21 is inflated and contracted, and when the leg stretch switch S2 is operated, the airbag 20 is inflated and contracted. When the forward bending stretch switch S3 is operated, the airbag 29 is inflated and contracted. When the storage switch S6 is operated, the motor 30 rotates in the reverse direction and the support bar 19 is stored in the position shown by the chain double-dashed line in FIG.

When the waist up switch S4 is pressed, the airbags 22 and 23 are inflated only while the waist up switch S4 is pressed. When the finger is released from the waist up switch S4, the airbags 22 and 2 are released.
The expansion of 3 is stopped. When the waist down switch S5 is pressed, the airbags 22 and 23 expanded only while the waist is pressed are contracted, and the waist down switch S5 is pressed.
The contraction of the airbags 22 and 23 is stopped when the finger is released from. These switches S4 and S5 are designed so that the waist can be fixed by the airbags 22 and 23 according to the size of the body.

As shown in FIG. 3, the air supply / exhaust device 40 includes a pump 41 for sending air to the airbags 21-23, 29, solenoid valves 42-46, a control circuit 50 including a CPU, and a power supply. A circuit 51 and a charging circuit 53 for charging the secondary battery 52 are provided.

The pump 41 and the electromagnetic valves 42 to 45 are communicated with each other by a communication pipe 60, and the electromagnetic valve 46 opens the pump 41 to the atmosphere to exhaust the air in the airbags 21 to 23. The solenoid valve 42 and the airbag 21 are communicated with each other by a communication pipe 61, the solenoid valve 43 and the airbags 22, 23 are communicated with each other by a communication pipe 62, and the solenoid valve 44 and the airbag 20 are communicated with each other by a communication pipe 63. The solenoid valve 45 and the air bags 29, 29 are connected by a communication pipe 64. The solenoid valve 47 is provided in the communication pipe 64, and the air bag 2
This is for exhausting the air inside 9.

The control circuit 50 controls the solenoid valves 42 to 47, the pump 41 and the motor 30 based on the operation of the switches S1 to S6. The air supply / exhaust device 40 includes a secondary battery 52.
, But the plug P is an outlet (not shown)
When connected to the control circuit 50, the control circuit 50 and the solenoid valves 42 to 46 are supplied with power from the power supply circuit 51.
At this time, the secondary battery 52 is charged by the charging circuit 53.

As shown in FIG. 4, the air supply / exhaust device 40 is provided in a storage portion 12A provided on the back surface of the backrest portion 12. Solenoid valves 42 to 45 of the air supply / exhaust device 40
And a communication pipe 61 for communicating the airbag 21 to 23, 29 with each other.
63 to 64 are arranged on the lower surface side of the seat portion 11 and the rear surface side of the backrest portion 12.

Next, the operation of the chair with a stretch function constructed as described above will be described.

When performing the forward bending stretch, first, the on / off switch S6 is turned on and the forward bending stretch S3 is pushed. Then, the solenoid valve 45 is opened (the other solenoid valves 42 to
43, 46, 47 are closed), the pump 41 is driven to send air into the airbag 29,
Expands. The expansion of the airbag 29 causes the backrest portion 12 to rotate forward around the support member 73 as shown by the chain line in FIG. That is, due to the expansion of the airbag 29, the backrest portion 12 is pressed forward and tilted.

On the other hand, when the forward bending S3 is pushed,
The motor 30 is driven to wind the wire 72, and the winding of the wire 72 causes the support bar 19 to rotate from the position indicated by the two-dot chain line in FIG. 4 to the position indicated by the one-dot chain line through the position indicated by the solid line. .

Tilt of the backrest 12 forward and support bar 19
The forward rotation is forcibly and efficiently performed due to the rotation of
Stretching will be performed efficiently and sufficiently.

When the backrest 12 moves to the chain line position and the support bar 19 moves to the two-dot chain line position, the solenoid valve 45 closes, the pump 41 stops, and the motor 30 stops.
Then, the states shown by the chain line and the chain double-dashed line in FIG. 4 are held for a certain period of time. After that, the solenoid valve 47 is opened and the inside of the airbag 29 is communicated with the outside air. Further, the motor 30 rotates in the reverse direction, the support bar 19 moves to the solid line position by the urging force of the spring (not shown), and the driving of the motor 30 is stopped. Whether the support bar 19 has reached the position indicated by the solid line is determined by, for example, providing a micro switch.

When the user raises his / her back by communicating the outside air in the air bag 29, the air in the air bag 29 is exhausted and the air bag 29 contracts, so that the backrest 12
Is raised to the solid line position. When the backrest 12 is raised to the solid line position, the solenoid valve 45 is opened and the solenoid valve 47 is closed, and the pump 41 is driven to drive the airbag 29.
Expands. For example, a micro switch may be provided to determine whether or not the backrest portion 12 has reached the solid line position.

Due to the expansion of the airbag 29, the backrest portion 12 is rotated forward in the same manner as described above. Further, the motor 30 is driven to rotate the support bar 19 to the position indicated by the alternate long and short dash line. These operations are repeatedly performed and the forward bending is performed multiple times. This number is preset,
The user may arbitrarily set it, or a timer may be used for a certain period of time.

When the upper body is stretched, the waist up switch S4 is pressed. While the waist up switch S4 is being pressed, the solenoid valve 43 is opened (the other solenoid valves 42,44
˜46 are closed), the air bags 22 and 23 are inflated by the pump 41. This airbag 22,2
The waist is fixed by the expansion of 3. When the waist is fixed in the right position, remove your finger from the waist up switch S4.
As a result, the solenoid valve 43 is closed and the airbags 22, 2 are closed.
Expansion of 3 is stopped.

Next, when the upper body stretch switch S1 is pressed, the pump 41 is driven and the electromagnetic valve 21 is opened, so that the air bag 21 is inflated by the pump 41. At this time, as shown in FIG. 5, the stretching handles 25 and 26 are held. The waist is fixed by the airbags 22 and 23, and by holding the stretch handles 25 and 26, the back warps as the airbag 21 expands, and the back muscles are stretched. As a result, stretching is performed.

By the way, since the airbag 21 extends along the spine and extends from the waist position to the shoulder position, the back muscle can be greatly extended by expansion, whereby the upper body is sufficiently stretched and stress is reduced. It can be resolved. Moreover, since the waist is fixed, the back muscles can be reliably extended and efficient stretching can be performed.

When the airbag 21 is inflated for a predetermined time, the driving of the pump 41 is stopped and the solenoid valve 46 is opened, so that the airbag 21 is contracted. These operations are repeated.

To stop stretching the upper body, press the upper body stretch switch S1 again. This allows
The drive of the pump 41 is stopped and the solenoid valves 46, 4
2 is opened and the airbag 21 is contracted.

When performing leg stretching, the leg stretch switch S2 is pressed. As a result, the solenoid valve 46 is closed and the solenoid valve 44 is opened (the solenoid valves 42, 4
(3, 45 are closed), and the pump 41 is driven to inflate the airbag 20. At this time,
Hook your instep on the support bar 19 as shown in. Therefore, as the airbag 20 expands, the legs extend and the stretch is performed.

When the air bag 20 is inflated for a predetermined time, the driving of the pump 41 is stopped and the solenoid valve 46 is opened to contract the air bag 20. These operations are repeated.

In order to stop the stretching, the leg stretch switch S2 is pushed again, and the inflation / deflation of the airbag 20 is stopped in the same manner as above.

By the way, when performing forward bending, if the leg stretch switch S2 is pushed to inflate the airbag 20 in advance, when the backrest 12 is tilted as shown by the chain line in FIG. Can be prevented from being pushed forward.

After stretching, the storage switch S6
push. Then, the motor 30 is rotated in the reverse direction, and the support bar 19 is stored in the position of the chain double-dashed line shown in FIG. 4 due to the biasing force of the spring, and the support bar 19 becomes an obstacle when used as a normal chair. Absent.

In the above embodiment, the left and right feet are lifted by the support bar 19, but the left and right feet may be lifted independently of each other. For example,
As shown in FIGS. 5 and 6, instead of the horizontal member 72, a shaft tube member 90 is attached between the side frames 71, 71, and the tube members 91, 92 are rotatably fitted to the shaft tube member 90. The cylindrical members are provided with supporting members 93, 94 extending downward, and support bars 95, 96 are provided at the lower ends of the supporting members 93, 94. Then, the support bars 95,
96 can be rotated in the direction of the arrow. Wire 97,
Reference numeral 98 is a winding device that uses two motors.

According to this example, by rotating only the support bar 95 or 96 in conjunction with the rotation of the backrest 12, it is possible to perform stretching according to the preference of the user.

Further, in the above embodiment, the support bar 19, 95 or 96 is rotated in conjunction with the rotation of the backrest 12, but only the backrest 12 is rotated. May be.

[0049]

As described above, according to the first aspect of the present invention, since the forward bending means for pushing the backrest portion forward with respect to the seat portion and tilting the backrest portion is provided, the backrest portion is provided. The clinker can be used to forcibly bend forward and perform sufficient stretching.

According to the second aspect of the present invention, a support portion for supporting the foot is provided at a lower position of the seat portion so as to be rotatable about an upper position of the support portion as a rotation fulcrum, and the support portion is provided on the backrest portion. Since it is lifted forward by rotating in association with tilting, stretching can be performed efficiently.

According to the third aspect of the present invention, since a pair of supporting portions are provided for the left and right feet only and each supporting portion is independently rotatable, stretching according to the user's preference is performed. It becomes possible.

According to the invention of claim 4, since the supporting portion can be stored in a state of being along the lower surface of the seat portion, the supporting portion becomes an obstacle when used as a normal chair. Never.

[Brief description of drawings]

FIG. 1 is a perspective view showing a chair with a stretch function according to the present invention.

FIG. 2 is a perspective view showing a rotating mechanism of a backrest portion and a support bar.

FIG. 3 is a block diagram showing a configuration of a chair with a stretch function of FIG.

FIG. 4 is an explanatory diagram showing a rotating state of a backrest portion.

FIG. 5 is an explanatory diagram showing a configuration of a support bar of another example.

FIG. 6 is a side view showing the configuration of the support bar of FIG.

[Explanation of symbols]

11 seat 12 backrest 29 Airbag

Claims (4)

[Claims] 1. A chair with a stretch function comprising a seat portion and a backrest portion rotatable with respect to the seat portion, wherein the backrest portion is pushed forward with respect to the seat portion and tilted. A chair with a stretch function, which is equipped with a forward bending mechanism. 2. A support portion for supporting a foot is provided at a lower position of the seat portion so as to be rotatable around an upper position of the support portion as a rotation fulcrum, and the support portion is interlocked with tilting of the backrest portion. The chair with a stretch function according to claim 1, wherein the chair is raised forward by rotating the chair. 3. A chair with a stretch function according to claim 2, wherein a pair of said support portions are provided exclusively for the left and right legs, and each support portion is independently rotatable. 4. The chair with a stretch function according to claim 2, wherein the support portion is storable in a state along the lower surface of the seat portion.