JP2008167908A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair, the main seat of which a user is seated sways keeping a certain height. <P>SOLUTION: The chair is provided with a seat 7 whose upper surface is used to seat the user, a frame 8 to support the seat 7 in the way that the seat is movable between the center of the chair and its sway end point, and a driving gear to force the seat 7 to move. When the seat 7 is located at the center, its height is lower than the seat height when it is at the swaying position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chair on which a seat body on which a user sits moves.

  Conventionally, there is, for example, Patent Document 1 as a chair in which a seat body moves. This chair includes a chair body placed on the floor, a seat body supported by the chair body so as to be operable in the horizontal direction, and a drive unit that drives the seat body. In this chair, when the motor of the drive unit rotates, the seat body reciprocates linearly or circularly on a horizontal plane.

Utility Model Registration No. 3001832

  In the chair described in Patent Document 1, the movement of the seat body is a one-dimensional movement that reciprocates linearly on the horizontal plane or a two-dimensional movement that moves circularly on the horizontal plane. It is. Therefore, when giving a sense of relaxation to the user seated on the seat body by moving the seat body, there is a problem that the effect is low because the movement of the seat body is flat and monotonous.

  Accordingly, the present invention has been made in view of the above-described problems, and an object thereof is to provide a chair capable of causing a seat body to swing with a component in the height direction.

In order to achieve the above object, a chair according to the present invention includes a seat body whose upper surface is a seat surface on which a user is seated, a center position, and a swing position in which the seat body is swung from the center position. A frame that is movably supported, and the height of the seat surface when the seat body is in the center position is lower than the height of the seat surface when the seat body is in the swing position It is.
According to this, the height of the seat surface changes as the seat body moves between the center position and the swing position. That is, the seat body can swing with a component in the height direction.

  The chair preferably includes a drive unit that forcibly moves the seat body. According to this, since a drive part can move a seat main part, the user who sat on the seat main body can be shaken automatically.

Further, the chair includes a sensor that detects a position of the seat body, and a return operation unit that returns the seat body to the center position that is a reference position based on the position detection of the seat body by the sensor. It is preferable.
According to this, the position of the seat body can be detected by the sensor, and based on this position detection, the return operation unit can return the seat body to the reference position.

  In the chair, the frame preferably includes a support member that supports the seat body in a suspended state. In this case, the support member supports the seat body in a suspended state, and the seat body is swung. Then, when the support member supports the seat body in a suspended state from both sides of the seat body, the seat surface in the state where the seat body is in the center position is in the state where the seat surface is in the swing position. A configuration that is lower than the height of the surface is obtained.

In the chair, the seating surface is preferably in a horizontal state or in a state of being inclined downward toward the center position at the swing position.
According to this, since the seat surface is in a horizontal state or in a state of being inclined downward toward the center position side in a state where the seat body is in the swing position, the user sitting on the seat body moved to the swing position On the other hand, it is possible to prevent giving a sense of slipping down from the seating surface to the outside in the swinging direction. That is, conversely, when the seat body is in the swing position and the seat surface is tilted outward in the swing direction, the user is given a sense that the seat surface is likely to slide outward. There is a risk that.
Furthermore, the height of the seat surface is low when the seat body is in the center position, the height of the seat surface is high when the seat body is in the swing position, and the seat surface is horizontal or at the center position side. Therefore, the user sitting on the seat body can be rocked with the position higher than the seat surface as the rocking center. Thereby, the amount of shake on the user's head side can be reduced as compared with the case where the seat surface is inclined downward in the swing direction.

  According to the chair of the present invention, since the seat body moves between the center position and the swing position, the height of the seating surface changes, so that the user can feel relaxed.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of the chair of the present invention. The chair includes a chair body 6 having left and right legs 6a and 6b to be placed on the floor, a seat 1 supported on the chair body 6, and a rear portion of the seat 1. And a backrest 2 that contacts the back and head of the user, and armrests 3a and 3b that are disposed on both the left and right sides of the seat 1 and can support the user's elbow and forearm. is doing. The seat 1 abuts against the buttocks and thighs (thighs) of the seated user (the user). A cover member and a pad are provided at the front portion of the backrest portion 2, but this is omitted in FIG.

  The backrest 2 is supported by the chair body 6 so as to be tiltable, and a reclining mechanism (not shown) for changing the tilt angle of the backrest 2 between the chair body 6 and the backrest 2. Z). The reclining mechanism includes an actuator that is driven to extend and contract by an electric motor, for example. When the actuator is extended, the backrest portion is in an upright state, and when the actuator is contracted, the backrest portion is in a collapsed state. Moreover, although not shown in figure, the leg mounting part which contact | abuts the seated user's leg in the front side of the seat part 1 may be provided.

  At least one of the seat part 1, the backrest part 2, and the leg rest part is provided with a massage tool for performing massage for the user. As a massage tool, for example, there is a treatment unit 4 having a treatment element 4a provided in the backrest part 2, and there are an air cell, a vibrator, etc., although not shown. Further, an air supply device that supplies air to the air cell, and a control device 5 that controls the movement of each massage tool and the operation of the seat portion 1 and the backrest portion 2 include a chair body portion 6 (seat portion 1). Below).

  The control device 5 is connected to an operating device (not shown) operated by the user, and the power is turned on and off and various massage operations are performed by operating the operating device. The operation device is provided with a power button, a stop button, a massage course selection button, an operation start button and an operation stop button for driving a drive unit 12 (see FIG. 4) to be described later. It has been.

  The seat portion 1 has a seat body 7 whose upper surface is a seat surface on which a user is seated. The seat body 7 has a pad at the top, but is omitted from FIG. The seat body 7 is a plate-like member formed in a rectangular shape in plan view.

  The chair body 6 has a frame 8 that supports the seat body 7. The frame 8 is connected to the leg portions 6a and 6b and is fixed to the floor surface. The frame 8 has a support member 9, and the frame 8 supports the seat body 7 through the support member 9 so as to be swingable. In the illustrated chair, the frame 8 supports the seat body 7 so as to be swingable in the left-right direction. In the present invention, the frame 8 may support the seat body 7 so as to be swingable in the front-rear direction, or may be supported so as to be swingable so as to have a circular locus.

FIG. 2 is a perspective view showing a seat structure having a frame 8, a seat body 7, and a support member 9. FIG. 3 is a perspective view showing the seat body 7 and the support member 9.
In FIG. 2, the frame 8 has side wall portions 10 on both the left and right sides, and a connecting portion 11 that connects these at the lower portion. The support members 9 are provided on both the left and right sides of the frame 8, respectively. As shown in FIG. 3, the support member 9 is a member in which a round bar is formed in a substantially U shape. The main body portion 9 a extends in the front-rear direction, and extends upward from the front and rear ends of the main body portion 9 a. Each arm portion 9b has an upper portion 9c extending in the front-rear direction from the upper end portion of each arm portion 9b. The support member 9 can be formed, for example, by plastically deforming a metal bar member.

In FIG. 3, the seat body 7 has mounting portions 7 b that protrude outward in the left-right direction at both left and right side portions. The attachment portion 7b is accommodated between the front and rear arm portions 9b of the support member 9.
The attachment portion 7b has a concave groove on the lower surface thereof that the main body portion 9a of the support member 9 engages. The main body portion 9a can support the attachment portion 7b from below, and can freely rotate between the two. It is free to move. Further, in FIG. 2, receiving portions 10 a are provided on the inner side surface of the side wall portion 10 of the frame 8 at respective positions before and after the inner surface. The receiving portion 10a is a portion where the upper portion 9c of the support member 9 is locked. The receiving portion 10a can support the upper portion 9c from below, and can freely rotate between the two. Accordingly, the frame 8 has a structure in which the seat body 7 is supported in a state of being suspended by the left and right support members 9, and the seat body 7 can swing in the left-right direction like a swing suspended from both the left and right sides. it can.
As described above, the swing center of the seat body 7 is located above the mounting position of the seat body 7 and the support member 9. Specifically, the position of the center line of the upper portion 9c of the support member 9 serving as the swing center of the seat body 7 is higher than the attachment position of the attachment portion 7b of the seat body 7 and the body portion 9a of the support member 9. is there.

  The chair (seat structure) further includes a drive unit 12 (see FIG. 4) that forcibly moves the seat body 7. FIG. 4 is a perspective view of the seat body 7, the support member 9, and the drive unit 12 as viewed from the back (backrest 2 side). FIG. 5 is a perspective view of the drive unit 12. The drive unit 12 includes a motor 13, a speed reduction unit 14 that reduces the rotational speed of the motor 13, a rotation member 16 that rotates integrally with the output shaft 15 of the speed reduction unit 14, and one end 17 a attached to the rotation member 16. The other end 17 b has a universal joint 17 attached to the seat body 7.

  The motor 13 and the speed reduction part 14 are attached to a frame member 18, and the frame member 18 is fixed to the chair body 6 (frame 8) (see FIG. 1). The output shaft 15 has an up-down direction as an axis, and the rotating member 16 is driven to rotate about this axis. One end 17a of the universal joint 17 and the rotating member 16 are connected to be freely rotatable at a position eccentric with the output shaft 15. The universal joint 17 is capable of 360 ° swinging between both end portions 17a, 17b and an intermediate rod-shaped main body portion 17c, and one end portion 17a and the other end portion 17b can be relatively displaced in the vertical direction. It is. For example, the universal joint 17 has a structure having ball joints at both end portions 17a and 17b.

The other end 17 b of the universal joint 17 is connected to the seat body 7 via a pin 19. A pin 19 is inserted into a vertical hole (through hole) provided in the seat body 7, and the seat body 7 and the pin 19 are prevented from being detached by a retaining pin 19a. The pin 19 is rotatable with respect to the seat body 7.
The motor 13 can rotate forward and backward based on a signal from the control device 5. When the motor 13 rotates in one direction, the rotating member 16 rotates in one direction, and thereby the universal joint 17 rotates eccentrically. The universal joint 17 functions as a crank member, and the seat body 7 supported by the support member 9 can swing back and forth in the left-right direction.

  FIG. 6 is a front view for explaining the operation of the seat body 7. The operation of the seat body 7 will be described. In FIG. 6, the frame 8 and the drive unit 12 are omitted. 2 and 6, the frame 8 includes a central position A between the left and right side wall portions 10, and swing positions B <b> 1, B <b> 2 that swing left and right from the center position A, respectively. It is movably supported. Specifically, the frame 8 supports the seat body 7 so as to be swingable between the swing positions B1 and B2 on both the left and right sides with the center position A interposed therebetween.

And the drive part 12 (refer FIG. 4) drives, and the seat main body 7 can be forced to reciprocate rocking | fluctuation to the left-right direction. 6A shows a state in which the seat body 7 is swung from the center position A to the right swing position B1 (hereinafter referred to as the right swing position B1), and FIG. 6B shows the seat body 7 in the center position. This is a state of swinging from A to the left swing position B2 (hereinafter referred to as the left swing position B2). The seat body 7 can repeat swinging with the right swing position B1 and the left swing position B2 being the swing stroke ends, and the center between the left and right swing stroke ends is the center position A. .
That is, one swing (swing to one side) of the seat body 7 is performed between the right swing position (first swing position) B1 and the left swing position (second swing position) B2. One stroke, the state where the seat body 7 is at the center position A is the stroke center, and the state where the seat body 7 is at the right swing position B1 or the left swing position B2 is the stroke end.

  According to the above embodiment, as shown in FIG. 6, the height at the center of the seat surface 7a when the seat body 7 is at the center position A is such that the seat body 7 is at the right swing position B1. The seat surface 7a is lower than the height at the center of the seat surface 7a in a certain state (FIG. 6A) and the seat body 7 is in the left swing position B2 (FIG. 6B). Lower than the height in the center. In other words, the height of the seating surface 7a at the center of the seat body 7 at the center of the stroke is lower than the height at the center of the seating surface 7a at the end of the stroke. Further, as shown in FIG. 6, the seat surface 7a of the seat body 7 is horizontal at the center position A and the right swing position B1 and the left swing position B2.

  FIG. 7B is a schematic diagram for explaining a conventional chair. The seat structure of the conventional chair shown in FIG. 7B is similar to the present invention in that a frame (not shown) supports the seat body 41 so that the seat body 41 can be moved, and the seat body 41 is located at the central position a. The center position a can be moved to the right swing position b1 swung to the right or the left swing position b2 swung to the left. However, the height at the center of the seating surface 41a when the seat body 41 is at the center position a is opposite to the present invention when the seat body 41 is at the right or left swing position b1, b2. It is a structure higher than the height in the center part of the seating surface 41a. In this conventional chair, the seat surface 41a is tilted outward in the left-right direction, which is the swinging direction, with the seat body 41 in the right or left swinging position b1, b2. Furthermore, this chair rocks the user M sitting on the seat body 41 with the position lower than the seating surface 41a as the center of rocking.

  For this reason, the user M seated on the seat body 41 swinging to the right or left swinging positions b1 and b2 is given a feeling that the user M is likely to slide down from the seating surface 41a in the left-right direction. There is a risk that. Further, the user M sitting on the seat main body 41 swinging to the right or left swinging positions b1 and b2 has his head H greatly shaken in the left-right direction (amount of swing E), and is seasick. May cause discomfort.

  Fig.7 (a) is a schematic diagram explaining the chair (the said embodiment) of this invention. As shown in FIG. 7 (a), according to the present invention, the height at the center of the seat surface 7a when the seat body 7 is at the center position A is the right or left swing position B1, The seat surface 7a is lower than the height of the seat surface 7a in the state of B2, and the seat surface 7a is horizontal at the right or left swing positions B1 and B2. For this reason, the user M sitting on the seat body 7 moved to the right or left swing position B1, B2 is given a feeling that the user M is likely to slide down from the seat surface 7a to the outside in the swing direction. Can be prevented, and a sense of security can be given.

  Further, in the present invention, the height of the seat surface 7a is low when the seat body 7 is in the center position A, and the seat surface 7a is in the state where the seat body 7 is in the right or left swing position B1, B2. Since the height is high and the seating surface 7a is horizontal, the user M sitting on the seating body 7 can be rocked with the position higher than the seating surface 7a as the rocking center. As a result, the shake amount e on the head H side of the user M can be made smaller than the case shown in FIG. 7B which is a conventional example (e <E). In addition, by operating the user M to swing left and right in accordance with the left and right swing of the seat body 7, the amount of shake e on the head H side can be reduced more effectively.

  In FIG. 5, the chair includes a sensor 20 that detects the position of the seat body. The sensor 20 is provided in the drive unit 12 and detects the position of the seat body 7 by detecting the position of the rotating member 16. More specifically, the sensor 20 is provided on a substrate 21 fixed to the frame member 18. The rotating member 16 rotates around the axis of the output shaft 16, and when the rotating member 16 makes one rotation, the seat body 7 makes one reciprocation between the right swing position B1 and the left swing position B2 (see FIG. 6). Move 2 strokes). That is, the swing position of the seat body 7 and the rotation position of the rotation member 16 have a corresponding relationship. Accordingly, the detected portion 20a is provided on the rotating member 16, and the sensor 20 detects the detected portion 20a, whereby the rotating position of the rotating member 16 can be determined and the swing position of the seat body 7 can be known.

  A conventionally known position detection sensor can be used as the sensor 20, but a non-contact type sensor is preferable, for example, a magnetic sensor (Hall IC) is preferable. In this case, a magnet may be attached to the rotating member 16 as the detected portion 20.

  As a result, the sensor 20 detects the detected portion 20a provided on the rotating member 16 when the seat body 7 is at the center position A, so that the sensor 20 detects the state where the seat body 7 is at the center position A. it can. A plurality of detected portions 20a may be provided on the rotating member 16, and the sensor 20 detects not only the center position A of the seat body 7, but also the right or left swing positions B1, B2, etc. Also good.

Further, the chair includes a return operation unit that returns the seat body 7 to the central position A (see FIG. 6), which is a reference position, based on the position detection of the seat body 7 by the sensor 20. The return operation unit can be the drive unit 12. In this case, the drive unit 12 may be stopped while the seat body 7 is at the center position A and the sensor 20 detects the detected portion 20 a provided on the rotating member 16. Specifically, for example, the sensor 20 can detect the detected portion 20a provided in the rotating member 16 in a state where the seat body 7 is at the center position A. Then, it is necessary to stop the seat body 7 at the center position (reference position) A in a state where the drive unit 12 swings and drives the seat body 7 by a signal from the control device 5 (see FIG. 1). In the case (when the control device 5 receives a stop signal), the drive unit 12 is stopped by a signal from the control device 5 at a position where the sensor 20 detects the detected portion 20a.
In order to stop the seat body 7 at the center position A, the operating drive unit 12 may be stopped immediately while the sensor 20 detects the detected portion 20a, but the control device 5 is stopped. When the signal is received, the drive unit 12 operates for a while so that the swing stroke of the seat body 7 gradually decreases, and then the drive unit 12 is completely stopped in a state where the sensor 20 detects the detected portion 20a. The seat body 7 is preferably stopped at the center position A.

Further, the control device 5 can rotate the rotating member 16 forward or backward in the driving unit 12 of FIG. For example, the motor 13 may be rotated by switching between normal and reverse. When the driving unit 12 continuously rotates the rotating member 16 in one direction, the seat body 7 continuously swings left and right. In this case, the seat body 7 reciprocally swings between the right swing position B1 and the left swing position B2 that are stroke ends (see FIG. 6).
Further, by switching the rotation direction of the rotation member 16 between forward and reverse in the drive unit 12 based on the signal from the control device 5, the seat body 7 can be used more than when the rotation member 16 is continuously rotated in one direction. Can be swung by a small stroke. That is, in FIG. 6, before the seat body 7 reaches the right swing position B1 or the left swing position B2 that is the stroke end from the center position A, the rotating member 16 is reversed and this operation is repeated. The seat body 7 can be swung by a small stroke.

  Furthermore, the control device 5 can change the rotation speed of the rotation member 16 in the drive unit 12. For example, the rotation speed of the motor 13 may be changed, or the reduction ratio in the reduction unit 14 may be changed. Thereby, the rocking speed of the seat body 7 can be changed, and the seat body 7 can be rocked slowly or quickly.

  FIG. 8 is a schematic view showing a modified example of the seat structure of the chair of the present invention. The seat body 7 has air cells 22 that expand and contract by air supply / discharge on both left and right sides. When these air cells 22 expand, the user M sitting on the seat body 7 can be sandwiched from the left and right. The air cell 22 that expands can be pressed so as to sandwich the buttocks or thighs of the user M sitting on the seat body 7 from both the left and right sides. And the seat main body 7 can be rock | fluctuated right and left as mentioned above in the state which pinched | interposed the user M sitting on the seat main body 7 by these air cells 22 from both right and left sides. Thereby, the user M can be shaken in a state where the user M is fixed to the seat body 7.

FIG. 9 is a schematic view showing another embodiment of the chair of the present invention. This chair is provided with a leg rest 23 on the front side of the seat 1 for placing the leg of the user M who is seated.
The footrest portion 23 is provided with a grip portion 24 that grips the leg of the user M. The gripping part 24 can be a massager that can press the calf portions of the left and right legs of the user M from the left and right directions. In particular, the massage device can be an air cell that expands and contracts by supplying and discharging air. By inflating these air cells, each leg is fixed to the footrest 23. The grip 24 is configured to sandwich the calf portion of the leg, but may be configured to sandwich the ankle portion of the leg, or the ankle portion and the calf portion.

  And the drive part 12 (refer FIG. 4) can rock | fluctuate the seat main body 7 in the state which the holding part 24 hold | gripped the user's M leg. The state shown by the two-dot chain line in FIG. 9 shows a state in which the seat body 7 is swung to one side in the left-right direction. According to this, in the state where the leg of the user M is fixed to the footrest portion 23, the horizontal swing is performed with respect to the user M on the seat body 7. Thereby, the user M can perform an effective rocking | fluctuation exercise | movement about the part below a waist | hip | lumbar part.

  Fig.10 (a) is sectional drawing of another Example of the backrest part 2 with which the chair of this invention is provided. The backrest 2 is provided with massage tools 25 corresponding to the left and right sides of the back of the user M, respectively. The massage device 25 has an air cell 26 that expands and contracts by supplying and discharging air, and the air cell 26 is provided along the height direction of the backrest 2. The pair of left and right massage devices 25 are installed away from each other on the left and right, and can be pressed so as to sandwich the back of the user M from both the left and right sides. Further, by sandwiching the user M from the left and right sides by the pair of massage tools 25, the upper body of the user M can be fixed so as not to move from side to side.

  FIG. 10B is a cross-sectional view showing a modification of the backrest 2. The backrest 2 has protrusions 27 protruding forward (on the side of the user M) on the left and right sides, and the upper body of the user M is fitted between the protrusions 27. A massage tool 25 is provided on each inner surface of the protrusion 27. The massage device 25 has an air cell 26, and the air cell 26 can be expanded and contracted by supplying and discharging air. The pair of left and right protrusions 27 (massage tool 25) are disposed away from each other on the left and right, and can be pressed so as to sandwich the back side portion of the user M from both the left and right sides. Further, by sandwiching the user M from the left and right sides by the pair of massage tools 25, the upper body of the user M can be fixed so as not to move from side to side.

  And in each embodiment of Drawing 10 (a) and (b), in the state where upper part of user M was fixed with a pair of massage tools 25, as above-mentioned, seat part 7 is drive part 12 (refer to Drawing 4). Can be swung left and right. Thus, by operating the seat body 7 with the upper body of the user M fixed to the backrest 2, the user M can perform an effective swinging motion on the waist.

  FIG. 11 is a schematic view of the chair of the present invention as viewed from above, and shows the backrest 2 in cross section. The backrest 2 is provided with an operating means 28 that can selectively project the left side and right side of the backrest surface 2a forward. The operation means 28 shown in FIG. 11 is a massage tool corresponding to each of the left and right side portions of the back of the user M. This massage device is provided so as to correspond to the left side and right side of the back of the user M's torso, and this massage device faces the left or right side of the user's back forward. Can be pressed. This massage device has a left air cell 29a and a right air cell 29b, and these air cells 29a and 29b can be expanded and contracted by supplying and discharging air.

  As shown in FIG. 11 (a), the right air cell 29b is expanded by the control of the control device 5, so that the right side portion of the backrest surface 2a protrudes toward the user side (forward), and You can push the right side. As a result, a twisting operation is performed in which the right half of the upper half (torso) B of the user M who is drowning in the backrest 2 is placed in front of the left half. On the other hand, as shown in FIG. 11B, when the left air cell 29a expands, the left side portion of the backrest surface 2a protrudes toward the user side (forward), and the left side portion of the back can be pushed. it can. Thereby, the twist operation which makes the left half of the user's upper half (torso) B drowning in the backrest part 2 before the right half is performed.

When the seat body 7 is swung in the left-right direction by the drive unit 12 under the control of the control device 5, the left side of the backrest surface 2 a by the massage tool (air cells 29 a, 29 b) in the backrest portion 2. The part and the right side part can be moved forward. Specifically, as shown in FIG. 11A, when the seat body 7 is swung to the right by the drive unit 12, the right air cell 29b is expanded so that the right side portion of the backrest surface 2a is moved. The projecting operation is performed. Alternatively, as shown in FIG. 11B, when the seat body 7 is moved leftward by the drive unit 12, the left air cell 29a is expanded to project the left side portion of the backrest surface 2a. Let it be done. Thereby, the operation | movement which twists an upper body can be accompanied with the operation | movement which rocks the user's M waist | hip | lumbar part to the right side or the left side.
Further, the control device 5 moves the seat body 7 to the right and projects the right side portion of the backrest surface 2a (FIG. 11A), and moves the seat body 7 to the left and backrest. The operation of projecting the left side portion of the surface 2a (FIG. 11B) is alternately performed. Thereby, a more effective rocking | fluctuation exercise | movement is attained and the treatment effect can be heightened further.

  Further, in the chair of FIG. 11, the leg placing portion 23 is configured to be movable in the longitudinal direction of the leg to be held and in the left-right direction orthogonal to the longitudinal direction, and driving means (not shown) for the leg placing portion 23. Thus, the leg mounting portion 23 is driven in the longitudinal direction and the lateral direction. Specific operations in the leg rest 23 include left-right swing, front-back swing, or composite swing (∞-shaped motion) obtained by combining left-right swing and front-back movement. Further, each of these swings can be performed in a suspended state in which the leg rest portion 23 is lowered, in a horizontal state in which the leg placing portion 23 is lifted upward, or in an intermediate state in the vertical direction. Thereby, the leg | lattice mounting part 23 can be rock | fluctuated two-dimensionally up and down or front-back, or can be rocked | fluctuated three-dimensionally front-back, up-down, left-right. 11A and 11B show a state in which the leg rest portion 23 is swung in the left-right direction.

The control device 5 can perform a combined operation in which any two or all of the operation of the leg rest portion 23, the operation of the seat body 7 and the operation of the backrest portion 2 are combined. That is, the drive unit 12 (see FIG. 4) moves (swings) the seat body 7 in the left-right direction and the like, and the left and right sides of the backrest surface 2a protrude forward by the massage tool 28 in the backrest 2. It is possible to perform a combination of at least two of the movement of the movement and the movement of the leg placement section 23 in the front-rear direction and the left-right direction by the driving means (not shown) for the leg placement section 23.
For example, the control device 5 moves the seat body 7 to the left and right when swinging at the leg rest 23, and the left side and right side of the backrest 2 a by the massage tool 28 in the backrest 2. Both or one of the operations for projecting the lens forward can be operated.

  Specifically, in FIG. 11A, when the seat body 7 is swung rightward by the drive unit 12 (see FIG. 4), the right air cell 29b is inflated and the right side portion of the backrest surface 2a is moved. The projecting operation is performed, and the leg rest 23 is swung to the left. 11B, when the seat body 7 is swung leftward by the drive unit 12, the left air cell 29a is inflated to cause the left side portion of the backrest surface 2a to protrude, and In this state, the leg rest 23 is swung to the right. Thereby, the operation | movement which twists an upper body and a lower body can be accompanied with the operation | movement which rocks a waist | hip | lumbar part to the right side or the left side.

  A plurality of massage programs are stored in the storage device of the chair control device 5 of the present invention. The massage program is composed of a plurality of massage steps. In each massage step, a massage tool provided on the chair (for example, the treatment element 4a provided on the backrest 2 in FIG. 1) performs a predetermined massage operation or swings the seat body 7. Is set.

In one massage step, the treatment operation by the massage tool (the treatment element 4a) provided in the backrest portion 2 and the reciprocating swing of the seat body 7 are not performed simultaneously. This is to prevent the treatment element 4a from coming into contact with the user's spine by the seat body 7 reciprocally swinging left and right.
However, in a certain massage program, the seat body 7 is moved to the left and right swing positions, and the seat body 7 is stopped at the moved position, and the treatment operation by the massage tool provided on the backrest 2 is performed. You may have the massage step to perform. Thereby, the treatment range by the massage tool of the backrest part 2 with respect to a user can be expanded. That is, when the seat main body 7 is in the center position A (see FIG. 7), the seat main body 7 is moved to the left and right swing positions with respect to the part where the massage tool of the backrest portion cannot be applied to the user M. By stopping at, you can apply massage tools.

  As described above, according to the chair of the present invention, as shown in FIG. 7, the height at the center of the seat surface 7a in the state where the seat body 7 is at the center position A is the right or left swing position B1, Since the seat surface 7a is lower than the height of the seat surface 7a in the state of B2, the seat body 7a moves between the center position A and the swing positions B1 and B2 to change the height of the seat surface 7a. That is, the seat body 7 can swing with a component in the height direction, and a comfortable relaxing feeling can be given to the user M sitting on the seat body 7.

  Since the drive unit 12 shown in FIG. 5 can swing the seat body 7 back and forth, the user sitting on the seat body 7 can be swung left and right. Since the swing of the seat body 7 can be made periodic and the swing is regular, a chair with a high relaxing effect can be obtained.

In addition, the chair of the present invention is not limited to the illustrated form, and may have other forms within the scope of the present invention.
For example, FIG. 12 is a schematic view showing another embodiment of the chair of the present invention. As shown in this figure, the support member 39 of the frame 8 supports the seat body 7 from below. The support member 39 is provided between the left and right side wall portions 10, and the upper surface of the support member 39 is a concave support surface 30. The support surface 30 has a smooth arc shape, and a central portion in the left-right direction is lower than both side portions. A rolling member 31 is interposed between the seat body 7 and the support surface 30. As a result, the seat body 7 can swing in the left-right direction. And the air cell 32 is each provided as the drive part inside the wall part 10 on either side. The left and right air cells 32 can be expanded and contracted by supplying and discharging air, and the seat body 7 can be pushed by alternately expanding the left and right air cells 32, and the seat body 7 is alternately swung left and right.

  In each of the above embodiments, the case where the seat body 7 is swung in the left-right direction has been described. However, the swing direction is not limited to the left-right direction. That is, the swing direction can be a direction including at least one of the left-right direction or the front-rear direction, or the left-right direction and the front-rear direction, or a movement by a circular orbit including such a component. In this case, the supporting member 9 (see FIG. 3) may be a flexible member (for example, a wire) in addition to the metal rod member.

Further, in the chair of the present invention, FIG. 7A illustrates the case where the seat surface 7a is horizontal with the seat body 7 in the right swing position B1 and the left swing position B2. Other than this, although not shown, the seat surface 7a may be inclined downward toward the center position A.
In each of the above embodiments, as shown in FIG. 5, the drive unit 12 includes the motor 13. However, the drive unit 12 may be other than this, and as shown in FIG. You may comprise by the air cell 32 which expands / contracts by supply / discharge.

It is a perspective view which shows one Embodiment of the chair of this invention. It is a perspective view which shows the seat structure which has a flame | frame, a seat main body, and a supporting member. It is a perspective view which shows the seat main body and the supporting member. It is the perspective view which looked at the seat main part, the supporting member, and the drive part from back. It is a perspective view of a drive part. It is a front view explaining operation | movement of a seat main body. (A) is a schematic diagram explaining the chair of this invention, (b) is a schematic diagram explaining the conventional chair. It is a schematic diagram which shows the modification of the seat structure of the chair of this invention. It is a schematic diagram which shows other embodiment of the chair of this invention. (A) is sectional drawing of another Example of the backrest part with which the chair of this invention is provided, (b) is sectional drawing which shows the modification of the backrest part. It is the schematic diagram which looked at the chair of this invention from the top, and has shown the backrest part by the cross section. It is a schematic diagram which shows another embodiment of the chair of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat part 7 Seat body 7a Seat surface 8 Frame 9, 39 Support member 12 Drive part 20 Sensor A Center position B1, B2 Swing position

Claims (5)

A seat body whose upper surface is a seating surface for seating a user;
A frame that supports the seat body so as to be movable between a center position and a swing position that is swung from the center position;
With
The chair according to claim 1, wherein a height of the seat surface in a state where the seat body is in the center position is lower than a height of the seat surface in a state in which the seat body is in the swing position.   The chair according to claim 1, further comprising a drive unit that forcibly moves the seat body. A sensor for detecting the position of the seat body;
The chair according to claim 1, further comprising: a return operation unit that returns the seat body to the center position that is a reference position based on the position detection of the seat body by the sensor.   The chair according to any one of claims 1 to 3, wherein the frame includes a support member that supports the seat body in a suspended state.   The chair according to any one of claims 1 to 4, wherein the seating surface is in a horizontal state or in a state of being inclined downward toward the center position in the swing position.

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