JP2007159764A - Standup support chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excellently operable standup support chair which supports standup preferably by lifting the buttocks of a user with a seat and pressing the back of the user with a backrest when the user stands up and also in which the backrest can be reclined. <P>SOLUTION: The chair is provided with: a base 20; a seat 30 whose front end is supported pivotally relative to the base 20 so that its rear end is turned in a vertical direction relative to the base 20; the backrest 40 whose lower end is pivoted at the seat 30 so that its upper end is turned forward and backward relative to the seat 30; a seat drive unit 50 for turning the seat 30 relative to the base 20; a backrest drive unit 60 for turning the backrest 40 relative to the seat 30; and a backrest turning control means which turns the upper end side of the backrest 40 backward relative to the seat 30 by operating the backrest drive unit 60 with the turning of the rear end side of the seat 30 upward relative to the base 20 by operation of the seat drive unit 50. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stand-up support chair, and in particular, includes a seat and a backrest, and when the user who is seated on the chair stands up from the chair, the user stands up by rotating the seat and the backrest. This is related to a stand-up support chair.

  When a user sitting on a chair stands up from the chair, the rear end side of the seat on which the user is seated is turned upward to lift the user's buttocks to support the user's rising. Various types have been devised. Above all, in a chair having a backrest that allows the user to bend his back, the backrest is rotated together with the seat so that the user's back can be pushed to support the user's rise. This inventor has already proposed.

JP 2004-337491 A

  The above-mentioned rising support chair can lift the user's buttocks and push the user's back to reduce the labor when the user stands up and to support the user's rising well. However, there was still room for improvement in the following points.

  That is, although the above-mentioned rising support chair has a backrest, the backrest cannot be tilted freely during use, and the backrest cannot be tilted, so-called “reclining”. It was inferior to. Therefore, there is room for improvement in this respect.

  The present invention has been made in view of the above-described situation, and when the user stands up, not only can the user lift the user's buttocks with a seat and push the back with a backrest to support the rise well. An object of the present invention is to provide a stand-up support chair that can recline a backrest and is excellent in use.

The main means taken by the present invention to solve the above problems are as follows:
"With the base,
A seat whose front end portion is pivotally supported by the base so that the rear end side thereof is rotatable in the vertical direction with respect to the base;
A backrest having a lower end portion pivotally supported by the seat so that the upper end side is rotatable in the front-rear direction with respect to the seat;
A seat drive device for rotating the seat relative to the base;
A backrest drive device for rotating the backrest relative to the seat;
As the rear end side of the seat is rotated upward with respect to the base by the operation of the seat driving device, the backrest driving device is operated to move the upper end side of the backrest relative to the seat. A standing support chair characterized by comprising a backrest rotation control means for rotating backwards "
It is.

  In the rising support chair having the above-described configuration, the backrest is rotatable with respect to the seat, and since the backrest drive device for rotating the backrest is provided, by operating the backrest drive device, The backrest can be tilted between the most upright state and the most tilted state with respect to the seat, that is, it can be reclined, and it becomes a stand-up support chair with excellent usability.

  By the way, if the angle of the backrest relative to the seat is fixed during the rotation of the seat that rotates relative to the base, the rear end side of the seat is rotated upward when assisting the user's rising. When it is moved, the posture of the backrest becomes a posture in which the upper end is located in front of the lower end, that is, the “forward leaning posture”, and the upper part of the user's back trying to stand up is pushed out unnecessarily. There is a risk of causing the body to lean forward.

  On the other hand, in the rising support chair having the above configuration, the upper end side of the backrest rotates backward with respect to the seat as the rear end side of the seat rotates upward by the backrest rotation control means. That is, since the backrest is rotated so as to be further tilted with respect to the seat, it is not greatly inclined forward as compared to a backrest having a fixed angle with respect to the seat. Therefore, it is possible to make the above-described problems difficult to occur. Therefore, when the user stands up, the user can press the back of the user accurately with the backrest, and can provide a rising support chair that can support the rising well.

  In particular, if the backrest rotation control means controls the rotation of the backrest so that the posture of the backrest will not be in a forward tilted state regardless of the angle of the seat relative to the base. It is possible to reliably prevent the back of the user from leaning forward and turning the user's body forward, and a more suitable rising support chair can be obtained.

In the means described above,
“The backrest rotation control means rotates the backrest while maintaining the posture of the backrest with respect to the base in a substantially vertical state as the seat rotates. Chair"
It is good.

  Here, “substantially vertical” is not strictly vertical, but is an angle of about a certain degree, for example, ± 30 °, preferably ± 15 °, more preferably ± 10 ° with respect to vertical (90 °). It is shown that this is allowed. In addition, the chair is usually placed on a horizontal surface such as a horizontal floor surface, and the rising support chair according to the present invention is naturally placed on the horizontal surface. Therefore, the state substantially perpendicular to the base can also be regarded as a substantially vertical state that is substantially perpendicular to the horizontal plane.

  When supporting the start-up by pushing the back, it is recommended that the user's upper body be in a vertical state and the entire back should be pushed straight from the start to the full rise The inventors of the present application have found out as a result of intensive studies.

  In the stand-up support chair having the above configuration, the back rest is rotated with respect to the seat so that the posture in the substantially vertical state is maintained. The entire back can be pushed straight in the horizontal direction. Therefore, the rising can be supported better.

  In addition, as for the range from the vertical state to a state in which the back rest is slightly tilted to the rear side (backward tilt state), it is necessary to prevent the back rest at least from being tilted forward. It is preferable from the point of not making the front turn. When supporting the rising, if the posture of the back is slightly tilted backward (80 ° ± 5 °) with respect to the vertical (90 °), the user remains in the back. Thus, the user's back can be pushed, that is, the user's back can be pushed while supporting the weight of the user by the backrest, and the rising can be further supported better.

In the means described above,
“After the backrest is in a substantially vertical state when the back end of the seat rotates upward with the backrest most upright with respect to the seat, As the seat is rotated, the back support is rotated backward with respect to the seat at a rotational angular velocity substantially the same as the rotational angular velocity of the seat.
It is good.

  In order to maintain the backrest in a substantially vertical state, for example, using a computer, the current backrest posture is calculated from the angle of the seat relative to the base and the angle of the backrest relative to the seat, and the angle of the backrest relative to the seat However, in such a mode, the control becomes complicated. In addition, a computer must be used, and the entire apparatus becomes large.

  On the other hand, when a person sitting in a chair that can recline back is going to stand up, it is normal to return the reclining back to the most upright state with respect to the seat. .

  Therefore, in the rising support chair having the above configuration, when the back end of the seat is turned upright with the back standing most upright with respect to the seat, Further, the rotation angular velocity when the seat rotates with respect to the base and the rotation angular velocity when the backrest rotates with respect to the base are made substantially the same. Thus, the seat can be rotated while the back rest is maintained in a substantially vertical state by simple control by the back rest rotation control means.

  As described above, according to the present invention, when the user stands up, the user's buttocks are lifted by the seat and the back is pushed by the back rest, so that the start can be supported well and the back rest is reclined. It is also possible to provide a stand-up support chair that can be used easily.

  Hereinafter, an example as an embodiment of a stand-up support chair according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the rising support chair 10 has a base 20 placed on an appropriate installation surface on which the rising support chair 10 is installed, such as an indoor floor, and the front end portion of the base 20 is freely rotatable. The seat 30 is supported by the base 20, and the lower end of the seat 30 is supported by the rear end of the seat 30 so that the rear end of the seat 30 can rotate in the vertical direction. And a backrest 40 that rotates. Here, in FIG. 1, a metal base frame 21 constituting the base 20, a metal seat frame 31 constituting the frame of the seat 30, and a back frame 41 constituting the frame of the backrest 40 are illustrated. It is shown. In the completed standing up support chair 10, although not shown, the base frame 21 is configured with an appropriate cover attached or appropriately decorated to form the entire base 20, and an appropriate cushion is provided on the seat frame 31. The seat 30 is configured as a whole by mounting the material and the skin material, and the backrest 40 is configured as a whole by mounting an appropriate cushion material and skin material on the backrest frame 41.

  In this example, a caster 22 is attached to the lower end portion of the base frame 21 so that the rising support chair 10 can be easily moved on the installation surface. Moreover, the armrest 42 is attached to the backrest 40 so that rotation is possible via the connection shaft 42a.

  The rising support chair 10 includes a seat driving device 50 that rotates the seat 30 with respect to the base 20, and a backrest driving device 60 that rotates the backrest 40 with respect to the seat 30. As shown in FIG. 2, the seat 30 rotates with respect to the base 20 by the operation of the seat driving device 50. Specifically, the seat 30 is centered on a connecting shaft 31a that connects the front end portion of the base frame 21 and the front end portion of the seat frame 31 and rotatably connects the base frame 21 and the seat frame 31 to each other. Rotates relative to the base 20. The backrest 40 is rotated with respect to the seat 30 by the operation of the backrest driving device 60. Specifically, the back end portion of the seat frame 31 and the lower end portion of the backrest frame 41 are connected to each other, and the backrest is centered on a connecting shaft 41a that rotatably connects the seat frame 31 and the backrest frame 41 to each other. The contact 40 rotates with respect to the seat 30.

  Here, in this example, a telescopic actuator that expands and contracts the rod by the operation of a built-in motor is adopted as the seat drive device 50, and one end side of this telescopic actuator is pivotally supported by the base frame 21, and the other end side is The seat frame 31 is pivotally supported. When the telescopic actuator is extended, the seat frame 31 rotates about the connecting shaft 31a with respect to the base frame 21, and the rear end side of the seat frame 31 moves upward. On the other hand, when the extended telescopic actuator is contracted, the rear end side of the seat frame 31 positioned above moves downward. In the state where the seat frame 31 is located at the lowest position with respect to the base frame 21, the seat frame 31 may come into contact with the stopper 23 provided on the base frame 21 and rotate further downward. Be regulated. In addition, the expansion and contraction limits of the expansion / contraction actuator are set, and the state where the seat frame 31 is in contact with the stopper 23 of the base frame 21 as described above is defined as the lowest limit position of the seat frame 31 and beyond. When the shrinkage is restricted and the seat frame 31 at the lowest limit position rotates by a predetermined angle with respect to the base frame 21, further extension is restricted with the state as the highest limit position of the seat frame 31.

  In this example, the seat frame 31 is parallel to the base frame 21 (the seat frame 31 is horizontal when the base frame 21 is placed on a horizontal floor surface, etc.). (Refer to FIG. 3A), the state rotated by 80 ° from the lowest limit position is set as the highest limit position (see FIG. 3C). Therefore, when the seat frame 31 is rotated to the uppermost limit position, the seat frame 31 is substantially perpendicular to the base frame 21, strictly speaking, slightly tilted rearward with the base frame 21 standing at 80 °. Thus, the user's buttocks seated on the seat 30 can be lifted and pushed forward well.

  As the backrest driving device 60, a motor mounted on the seat frame 31 is used as the driving force. When the motor is rotated in one direction, the backrest frame 41 in the most upright state with respect to the seat frame 31 is rotated and tilted around the connecting shaft 41a, that is, in a reclining state. On the other hand, when the motor is rotated in the opposite direction, the reclining back frame 41 returns to the upright state. In the backrest driving device 60, the state in which the backrest frame 41 is most upright is the uppermost limit position of the backrest 40, and the state in which the backrest frame 41 is tilted is the lowermost limit position. The operating range of the backrest driving device 60 is set so that the frame 41 does not rotate.

  In this example, the angle between the seat frame 31 and the backrest frame 41 is 100 °, and the state where the backrest frame 41 is slightly tilted backward with respect to the seat frame 31 is the uppermost limit position of the backrest frame 41. (Refer to FIG. 3A), the state where the angle formed between the seat frame 31 and the backrest frame 41 is 170 ° with the upper end side rotated 70 ° rearward from the uppermost limit position. As a position (see FIG. 4A). Therefore, when the back support frame 41 is reclined to the lowest limit position, the seat support 30 and the back support 40 are almost flat, and the user can lie down comfortably.

  By the way, although not shown, the armrest 42 of the backrest 40 is provided with an operation switch for operating the seat drive device 50 and an operation switch for operating the backrest drive device 60. By operating the operation switch of the driving device 60, the backrest 40 can be individually rotated. In the rising support chair 10, the operation switch of the seat driving device 50 is operated to operate the seat 30. When the rear end side is rotated upward, backrest rotation control means for operating the backrest drive device 60 in conjunction therewith is provided. Next, details of the backrest rotation control means will be described.

  The rising support chair 10 of this example is provided with a detector (not shown) that detects when the seat frame 31 is rotated by a predetermined angle from the lowest position with respect to the base frame 21. Specifically, the detector is configured by a limit switch attached to the base frame 21. When the limit switch is released from the state in contact with the seat frame 31, the rotation angle of the seat frame 31 is changed. It is detected that the predetermined angle has been reached. The backrest rotation control means is constituted by a control circuit that operates the backrest drive device 60 in conjunction with the seat drive device 50 using this detector.

  Next, the operation mode of the rising support chair 10 of this example will be described. In the following, for convenience of explanation, the state in which the above limit switch is in contact with the seat frame 31 is referred to as the detector ON state, and the state in which the limit switch is not in contact with the seat frame 31 is in the detector OFF state. Will be described. Further, as the rotation direction of the motor of the backrest driving device 60, rotation in a direction in which the backrest frame 41 is tilted with respect to the seat frame 31 is referred to as normal rotation, and the direction in which the backrest frame 41 is raised with respect to the seat frame 31. Will be referred to as reverse rotation.

  As shown in FIG. 3 (a), when the seat frame 31 is at the lowermost limit position and the backrest frame 41 is at the uppermost limit position, the detector is in the ON state. Even if operated, the backrest driving device 60 does not operate in conjunction with it. Moreover, the backrest drive device 60 can be operated independently by operating the operation switch of the backrest drive device 60.

  When the seat drive device 50 is operated by operating the operation switch of the seat drive device 50 from such a state, the seat frame 31 rotates, as shown in FIG. Is rotated to a predetermined angle θ, the detector is turned off. At this time, as the seat frame 31 rotates, the rearward tilted posture of the backrest frame 41 gradually approaches a vertical posture. In this example, the rotation angle of the seat frame 31 in a state where the backrest frame 41 is in a completely vertical posture is the predetermined angle θ, and specifically, the predetermined angle θ is 10 °. .

  Then, when the seat frame 31 is further rotated while the detector is in the OFF state, the motor of the backrest driving device 60 rotates forward in conjunction with this, and the backrest frame 41 is moved to the seat frame 31. It begins to lean against it. Here, in this example, the rotational angular velocity of the seat frame 31 and the rotational angular velocity of the backrest frame 41 coincide with each other, and when the seat frame 31 rotates beyond the predetermined angle θ, As shown in FIG. 3C, the posture of the backrest frame 41 is always maintained in the vertical state until the seat frame 31 reaches the maximum upper limit position. In this example, when the seat frame 31 is at the uppermost limit position, the backrest frame 41 is at the lowermost limit position.

  When the seat frame 31 is returned from the uppermost position to the lowermost position, the seat driving device 50 and the backrest driving device 60 are operated in opposite directions, specifically, the seat driving device 50 is contracted, Each of the seat frame 31 and the backrest frame 41 is reverse to the above until the motor of the backrest driving device 60 rotates in the reverse direction to the state shown in FIG. 3B from the state shown in FIG. Rotate in the direction. Then, when the detector is turned on in the state shown in FIG. 3B, the rotation of the backrest frame 41 stops at the upper limit position, and the seat frame 31 is further rotated downward. The initial state shown in 3 (a) is restored.

  By the way, when the seat frame 31 is rotated upward in a state where the backrest frame 41 is reclined, the backrest frame 41 is reclined by a detector or the like that detects the rotational angle of the backrest frame 41. This may be detected, and control may be performed so that the backrest frame 41 is returned to the maximum upper limit position prior to the rotation of the seat frame 31. However, in such an aspect, the control system of the backrest driving device 60 that drives the backrest frame 41 becomes complicated.

  Therefore, in this example, even if the backrest frame 41 is reclined, if the seat frame 31 rotates beyond the lower limit position beyond the predetermined angle θ and the detector is turned off, the seat frame 31 of the seat frame 31 beyond that is turned off. In conjunction with the rotation, the backrest frame 41 is further rotated in the direction of the lower limit position until the backrest frame 41 reaches the lower limit position.

  For example, FIG. 4A shows a state in which the seat frame 31 is in the lowest limit position and the backrest frame 41 is also in the lowest limit position. In this state, as shown in FIG. 4B, when the seat frame 31 is rotated to a predetermined angle θ, the detector is in the ON state and the backrest frame 41 does not rotate, Since this frame 41 is the lowest position, it cannot be rotated any further. Even if the seat frame 31 is rotated beyond the predetermined angle θ and the detector is turned off, the backrest frame 41 cannot be further rotated. As it is, it only moves with the movement of the rear end side of the seat frame 31, and the entire seat frame 31 and the backrest frame 41 simply rotate integrally with respect to the base frame 21. It is. And as shown in FIG.4 (c), if the seat frame 31 rotates to a maximum upper limit position, the attitude | position of the backrest frame 41 will be in a perpendicular | vertical state. Thus, since the posture of the backrest frame 41 is finally vertical, in the rising support chair 10 of this example, even if the seat 30 is rotated while the backrest 40 is reclining, Therefore, the back of the user can be favorably pushed by the back support 40 in a vertically vertical position, so that the function of supporting the rising by the back support 40 is not hindered.

  On the other hand, when the seat frame 31 is rotated in a state where the backrest frame 41 is in the midway position between the uppermost limit position and the lowermost limit position, the seat frame 31 is rotated beyond a predetermined angle θ. The backrest frame 41 is tilted with respect to the seat frame 31 until it reaches the lowest limit position, and finally, the posture of the backrest frame 41 becomes vertical as described above. Therefore, even when the backrest 40 is in the middle position, the backrest 40 that is finally in a vertical posture can favorably boost the user's back, which hinders the function of supporting the rising by the backrest 40. Don't come.

  Note that the present invention is not limited to the above-described example, and the setting value of the predetermined angle θ and the setting values of the upper limit position and the lower limit position of the seat 30 and the backrest 40 may be changed as appropriate to assist rising. The posture of the backrest 40 may be slightly inclined backward, for example, 85 ° with respect to the base 20.

It is a perspective view which shows the frame of an example of the stand-up assistance chair which concerns on this invention. It is a perspective view which shows the state which rotated the seat part of the stand-up assistance chair shown in FIG. It is a side view which shows typically the one aspect | mode of the action | operation of the stand-up assistance chair shown in FIG. It is a side view which shows typically another aspect of an action | operation of the stand-up assistance chair shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Standing support chair 20 Base 21 Base frame 22 Caster 23 Stopper 30 Seat 31 Seat frame 31a Connection shaft 40 Backrest 41 Backrest frame 41a Connection shaft 42 Armrest 42a Connection shaft 50 Seat drive device 60 Backrest drive device

Claims (3)

The base,
A seat whose front end portion is pivotally supported by the base so that a rear end side thereof is rotatable in the vertical direction with respect to the base;
A backrest having a lower end portion pivotally supported by the seat so that the upper end side is rotatable in the front-rear direction with respect to the seat;
A seat drive device for rotating the seat relative to the base;
A backrest drive device for rotating the backrest relative to the seat;
As the rear end side of the seat is rotated upward with respect to the base by the operation of the seat driving device, the backrest driving device is operated to move the upper end side of the backrest relative to the seat. A stand-up support chair comprising backrest rotation control means for rotating backward.   The backrest rotation control means rotates the backrest while maintaining the posture of the backrest relative to the base in a substantially vertical state as the seat rotates. The stand-up support chair described in 1.   The backrest rotation control means is configured such that when the back end of the seat pivots upward with the backrest most upright with respect to the seat, the backrest is in a substantially vertical state. The rising support chair according to claim 2, wherein the backrest is rotated backward with respect to the seat at a rotation angular velocity substantially the same as the rotation angular velocity of the seat as the seat rotates. .

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