KR20050076623A - Chair - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a chair having a reclining mechanism in which the occupied area can be made as small as possible while preventing the backrest from protruding rearward when reclining, and the contact position of the body such as the shoulder does not change. do.

The present invention provides a chair body having a seat surface portion and a back portion, and a chair having a support portion for supporting the chair body, wherein the angle between the seat surface portion and the back portion is fixed between the support portion and the chair body. It is characterized by providing a reclining mechanism for moving the support back and the seat surface portion forward while laying the back portion back.

Description

Chair {CHAIR}

The present invention relates to a chair suitable for a massage chair or the like, and more particularly to a reclining mechanism.

When a chair having a conventional reclining mechanism is laid down, the chair is more protruded rearward than when the backrest is standing up. For this reason, when placed near the wall, there is a problem that a gap must be provided between the wall assuming a state where the back portion is laid down.

In order to prevent such a backrest from protruding backward, Patent Document 1 proposes to slide the lower part of the backrest portion and the seat surface portion forward along the support frame when reclining.

However, the reclining mechanism described in Patent Literature 1 has a structure in which the seat surface portion has a constant angle and only the back portion is laid down, so that the seat surface portion is pushed forward so that the entire occupied area of the chair is large and the space is not sufficient. There was a problem that I could not. In addition, since the shoulder position corresponding to the back portion is changed in the state where the back portion is raised and in the lying state, there is a problem that the massage chair is distorted when the reclining angle is changed even when the shoulder position for massage is adjusted.

(Patent Document 1) Published Patent Publication No. 2001-178575

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and it is possible to reduce the occupied area as much as possible while preventing the backrest from protruding rearward when reclining, and furthermore, a reclining mechanism in which the contact position of the body such as the shoulder does not change. It is to provide the equipped chair.

In order to achieve the above object, the present invention provides a chair having a seat body having a seat surface portion and a backrest portion, and a support portion supporting the chair body from below, wherein the seat surface portion and the back portion are disposed between the support portion and the chair body. And a reclining mechanism for moving the seat surface portion and the backrest portion forward while the backrest portion is laid on the rear side with the angle of the back fixed.

In addition, the present invention provides a link member for connecting the reclining mechanism to the support portion and the backrest portion, a moving portion provided near the bent portion of the seat surface portion and the backrest portion of the chair main body, and a guide portion for assembling the movable portion to move forward and backward. It is good also as a structure provided with the actuator which changes the attitude | position of a chair main body. The moving part may be configured to rotate rotatably along the guide part.

The actuator may be configured to be stretched and contracted so that one end thereof is connected to the moving part of the chair main body and the other end thereof is connected to the support part.

The actuator may be configured to expand and contract, and may be configured to connect the support portion and the seat surface portion.

The actuator may be configured to be stretched and connected between the support portion and the backrest portion.

Moreover, the said moving part may be provided with the wheel which makes rolling contact, and an actuator may be a rotary actuator which rotationally drives wheels, such as a rubber tire.

The present invention also provides a front support leg and a rear support leg spaced forward and backward on the support portion, and a reclining mechanism is provided along the front portion moving portion provided on the front support leg and the seat surface portion, and the front portion is provided. A front guide part in which a moving part is assembled to be movable in the front-rear direction, a rear part moving part provided in the rear support leg, and a rear part guide provided along the backrest part and the rear part moving part is assembled to be movable in the front-rear direction. It is good also as a structure provided with the flexible actuator which connects a part and a chair main body and a support part, and it is good also as a structure which changes the attitude | position of a chair main body by expansion and contraction of an actuator. The front portion moving portion and the rear portion moving portion may be configured to rotate rotatably along the guide portion.

The actuator may be configured to connect between the front support leg of the support portion and the seat surface portion of the chair body. The actuator may be configured to connect between the rear support leg of the support portion and the backrest portion of the chair body.

In addition, the present invention provides a supporting wall positioned on the left and right sides of the chair main body, and a reclining mechanism is provided on the other side of the front moving part and the rear moving part provided on one side of the supporting wall and the chair main body. A guide for supporting the front moving part and the rear moving part so as to be movable in the front-rear direction and guiding the front moving part relative to the upper side rather than the rear moving part as the chair main body faces the front to lower the posture of the back part; A flexible actuator may be provided which connects between the chair main body and the support to change the posture of the chair main body.

The guide may be a guide groove provided in the support wall, and the front portion moving portion and the rear portion moving portion may be guide convex portions that are slidably inserted into the guide groove. The front portion moving portion and the rear portion moving portion may be configured to rotate rotatably along the guide.

In addition, the guide for guiding the rear moving portion has a slope that is lowered toward the front, the guide for guiding the front portion moving portion is characterized by having a slope that increases toward the front.

Further, the reclining mechanism may include a four-section link mechanism that connects the seat surface portion and the support portion of the chair main body, and an elastic actuator provided in a diagonal direction of the four-section link mechanism.

In the reclining mechanism, a pinion disposed near the boundary between the seat surface portion and the backrest portion and a rack disposed on the support portion and engaged with the rack may be provided.

In addition, the present invention may be used as a massage chair provided with a massage mechanism in the back portion. In addition, the present invention may be used as a massage chair having a foot massage mechanism in the footrest.

The present invention will be described below based on the illustrated embodiments.

Example 1

1 and 2 show the frame of the chair according to the first embodiment of the present invention.

1 shows the whole chair, and is provided with the chair main body 4 which has the seat surface part 2 and the backrest part 3 roughly, and the support-type support part 5 which supports the chair main body 4, The seat surface portion 2 together with the operation of laying the back portion 3 rearward in a state where the angle of the seat surface portion 2 and the backrest portion 3 is fixed between the support portion 5 and the chair body 4. The reclining mechanism 6 which moves the backrest part 3 forward is provided.

A footrest portion 7 is also provided in front of the seat surface portion 2 of the chair main body 4, and the backrest portion 3, the seat surface portion 2 and the footrest portion 7 are integrally molded by one frame structure. have. That is, it has a pair of left and right vertical frames 41 and 41 and a pair of front and rear horizontal frames 42 and 42, and the vertical frame 41 has a predetermined angle at the boundary between the backrest part 3 and the seat surface part 2. The structure is bent in a valley shape and bent in a predetermined angle mountain shape at the boundary between the seat surface portion 2 and the footrest portion 7.

The support part 5 also has a rectangular frame structure, and is set in the range of the projection area | region which projected the chair main body 4 of the state in which the backrest part 3 stood up from the upper side perpendicularly. The reclining mechanism 6 includes link members 61 and 61 which connect the support part 5 and the backrest part 3, and the seat surface part 2 and the backrest part of the chair body 4 constituted by the vertical frame 41. (3) A pair of rollers 62 as a moving part provided in the vicinity of the side part of the curved part, and a pair of U-shaped roller guides as a guide part by which the roller 62 is rotatable and movable in the front-back direction. It is set as the structure provided with 63 and the actuator 64 which changes the attitude | position of the chair main body 4. As shown in FIG.

The link members 61 and 61 are provided in a pair of right and left, and each end is in the center of the frame part 41a on the left and right of the backrest part 3, and the other end is the rear right and left right angles of the support part 5, respectively. It is pivotally connected to the wealth. In this example, the roller 62 is rotatably attached to the outer surface of the attachment plate 62a fixed to the lower end portions of the left and right frame portions 41a of the backrest portion 3. The left and right rollers 62 and 62 are connected to the connecting shaft 62b. The left and right rollers 62 and 62 and the connecting shaft 62b constitute a moving part.

In addition, the roller guide 63 is fixed in parallel with each other by a predetermined length on the left and right frames 51 and 51 of the support part 5 with a U-shaped groove into which the roller 62 is fitted. The actuator 64 is configured to expand and contract in a straight line in the front-rear direction. The rear end is pivotally connected to the connecting shaft 62b between the rollers 62, and the front end is pivotally connected to the front frame 52 of the support 5. .

The actuator 64 may be a structure that is stretched and driven, and is not particularly limited. The actuator 64 is stretched and driven by a feed screw mechanism and a motor 64a in which a feed screw shaft and a nut are not shown in this example. ) And a conveying screw mechanism not shown between the rod 64c inserted into the cylinder 64b.

Next, the operation of the chair of the first embodiment will be described. When the backrest part 3 is laid down, the actuator 64 is retracted. Then, as shown in FIG. 2, the roller 62 rotates forward along the roller guide 63, the lower part of the backrest part 3 moves forward, and the backrest part is carried out by the link member 61. FIG. (3) is tensioned and laid down at a predetermined angle. As the lower back portion 3 is laid down as described above, the lower end moves forward to prevent the back portion 3 from protruding backward.

On the other hand, since the angles of the seat surface portion 2, the footrest portion 7 and the seat surface portion 2 and the backrest portion 3 of the chair main body 4 are fixed, the footrest portion is as much as the amount of the backrest portion 3 lying down. (7) and the seat surface portion 2 rise upwards, and the projected dimension forward can be reduced by the b dimension, so that the occupied area can be made smaller than the case where only the back portion 3 is laid down (see the dashed-dotted line in the figure). .

Moreover, since the shape of the chair main body 4 does not change even if the back part 3 is laid down, the contact position of the body with respect to the back part 3 does not change, and the massage which installs a massage mechanism in the back part 3 is provided. In the case of the chair, since the adjustment position of the massage mechanism does not change, it is not necessary to adjust the massage position again when the angle of the back part 3 is changed. In addition, since the angle of the seat surface part 2 and the footrest part 7 does not change, the back part 3 lie down and the height of the foot supported by the footrest part rises, and it helps to relieve swelling of a foot | foot.

Next, another Example of this invention is described. In the following description, differences from the above embodiments will be mainly described, and the same components will be denoted by the same reference numerals and the description thereof will be omitted.

Example 2

3 shows a chair according to Embodiment 2 of the present invention. In this Embodiment 2, the front support leg 251 and the rear support leg 252 are provided spaced back and forth to the support part 205. FIG. The front support leg 251 and the rear support leg 252 are U-shaped members, and are integrally connected by a vertical frame 253 extending in the front-back direction. In addition, the upper portion of the front support leg 251 is connected by the front frame 254 extending in the horizontal direction.

The reclining mechanism 206 is provided along the front roller 262 as a front moving portion provided on the front support leg 251, along the seat surface portion 2, and the front roller 262 is rotatable and is also forward and backward in direction. A front roller guide 263 as a guide part assembled so as to be movable in a direction, a rear roller 265 as a rear part moving part provided on the rear support leg 252, and a backrest part 3, Of the rear roller guide 266 as the rear guide portion on which the secondary roller 265 is rotatably and movable in the front-rear direction, the backrest portion 3 and the seat surface portion 2 of the chair main body 4; With the flexible actuator 64 connecting between the center frame 255 positioned at the boundary and the front frame 254 of the support portion 205, the expansion of the actuator body 64 of the chair body 4 It is a structure which changes a posture.

Although the actuator 64 is disposed on the lower surface side of the seat surface portion 2, the actuator 64 is disposed on the back support portion 3 side, and the rear support leg 252 of the support portion 205 and the back support portion of the chair body 4 are provided. It is good also as a structure which connects 3). In addition, the actuator 64 may be configured to connect the vertical frame 253 and the back portion 3 of the chair main body 4.

In the case of the second embodiment as well, when the backrest part 3 is laid down, the actuator 64 is contracted as shown in Figs. 3B and 3C. Then, the front roller 262 and the rear roller 265 are rotated backward along the front roller guide 263 and the rear roller guide 266, and the lower end of the back 3 is relatively forward. At the same time, since the front end of the seat surface portion 2 rises upward, the backrest portion 3 is laid down at a predetermined angle. In this way, the backrest 3 can be prevented from protruding backward by moving forward while lying down.

On the other hand, since the sheet surface portion 2 and the footrest portion 7 are shifted at an angle upwards at an angle, the protruding dimension in the forward direction is reduced, and the occupied area can be made smaller than when moving horizontally. In addition, since the shape of the chair main body 4 does not change, the contact position of the body with respect to the backrest part 3 does not change. In addition, according to the structure of this Embodiment 2, since there is no link member which supports the backrest part 3 like Example 1, it can make it look like the chair which a movable part does not appear. In addition, in the second embodiment, unlike the first embodiment, the structure of the seat surface portion 2, the backrest portion 3, and the footrest portion 7 constituting the chair main body 4 is not an integral structure of the frame, but a seat surface portion. Although the frame which comprises (2) and the footrest part 7 and the frame which comprises the backrest part 3 are comprised integrally, the point of fixing each part is the same.

Example 3

4 shows a chair according to Embodiment 3 of the present invention.

Unlike the second embodiment, the third embodiment is provided with a pair of support walls 351 positioned on the left and right sides of the chair main body 4 in the support-type support portion 305, and the chair is supported with respect to the support wall 351. The main body 3 is supported at two places before and after. In the example of illustration, a pair of fixed wall 21 protrudes from the sheet surface part 2 so that the support wall 351 may be provided, and the fixed wall 21 is supported with respect to the support wall 351. As shown in FIG.

The reclining mechanism 306 includes a front slide convex portion 362 and a rear slide convex portion 365 provided on the fixed wall 21 provided on the seat surface portion 2 of the chair main body 4, and a support wall 351. And the front slide convex portion 362 and the rear slide convex portion 365 to be movable in the front-rear direction, and the rear slide convex portion 365 as the chair body 4 faces the front. Furthermore, the front guide groove 363 and the rear guide groove 366 as guides for guiding the front slide convex portion 362 to be positioned relatively upward and lying down the posture of the back portion 3, and the chair body (4) and the support portion 305 is connected, characterized in that the flexible actuator 64 for changing the posture of the chair main body 4 is provided.

The front slide convex portion 362 and the rear slide convex portion 365 are slidably fitted in the front guide groove 363 and the rear guide groove 366. The rear guide groove 366 for guiding the rear slide convex portion 365 has an inclination lowering toward the front, and the front guide groove 363 for guiding the front slide convex portion 362 is directed toward the front. Have a higher slope.

One end of the actuator 64 is pivotally connected to the bracket 352 on the support located at the lower end of the rear of the support wall 351 of the support 305, and the other end of the fixed wall 21 of the chair body 4 is fixed. It is pivotally connected to the center of the shaft 22 spanning between the front slide convex portion 362 located below the front end. The actuator 64 is located approximately on the same inclined line as the front guide groove 363.

In the case of the third embodiment, as shown in Figs. 4B and 4C, the actuator 64 is extended when the backrest part 3 is laid down. Then, the front slide convex 362 and the rear slide convex 365 slide forward along the front guide groove 363 and the rear guide groove 366, and the backrest 3 While the lower end moves forward, the front end of the seat surface portion 2 rises upward, and the backrest portion 3 lies down at a predetermined angle. In this way, the backrest 3 can be prevented from protruding backward by moving forward while lying down.

On the other hand, since the sheet surface portion 2 and the footrest portion 7 are shifted at an angle upwardly, the protruding dimension in the forward direction is reduced, and the occupied area can be made smaller than when moving horizontally. In addition, since the shape of the chair main body 4 does not change, the contact position of the body with respect to the backrest part 3 does not change.

According to the structure of this Embodiment 3, since the actuator 64 etc. are not seen by the support wall 351 and the fixed wall 21, it is easy to protect a movable part. However, instead of the fixed wall 21, the frame member which supports the chair main body 4 from the lower side and supports the front slide convex part 362 and the rear slide convex part 365 to a side may be used.

Example 4

5 shows a chair according to Embodiment 4 of the present invention. In the fourth embodiment, the reclining mechanism 406 connects the frame-shaped support portion 405 and the back portion 3, and the seat surface portion 2 and the back portion 3 of the chair body 4. The wheel 462 as a moving part provided in the vicinity of ()) and the motor 464 as an actuator for changing the posture of the chair main body 4 are comprised. In other words, the wheel 462 in rolling contact is used as the moving part, and the motor 464 for rotationally driving the wheel 462 is used as the actuator.

Although the support part 405 is a rectangular frame like Example 1, the width | variety of the left and right frame 451 is wide, and the wheel 462 is rotatably contacting the upper surface of this left and right frame 451. A rubber tire is used as the wheel 462, and is rotatably attached to the attachment plate 462a fixed to the frame near the boundary between the seat surface portion 2 and the backrest portion 3 of the chair main body 4, and the frame It moves on the frame 451 by friction with 451.

The motor 464 arranges the motor shaft along the frame 451 so as not to protrude to the side of the support part 405. Since the drive shaft of the motor 464 is orthogonal to the axle of the wheel 462, the direction in which power is transmitted is changed by a power transmission mechanism composed of a worm and a worm foil (not shown).

In addition, in order to limit the angle of the backrest part 3 to a predetermined range, the limit switch 467 which detects the minimum position (rise position) and the maximum position (the most laid position) of the angle which the backrest part 3 lays down. 468). In the example shown, the limit switches 467 and 468 are arranged to fit on the frame 41a of the backrest 3 so as to be turned on / off by the inclination of the link member 61. have.

In the case of the fourth embodiment, when the backrest part 3 is laid down, as shown in FIGS. 5B and 5C, the wheel 462 is rotationally driven by the motor 464 to support the wheel 462. It rotates forward along the left and right frame 451 of 405. As a result, the lower end of the backrest portion 3 moves forward, and the front end of the seat surface portion 2 rises upward. When the predetermined angle is laid down, the link member 61 presses one limit switch 467 to stop. In the case of standing up, the motor 464 is rotated in reverse to retract the wheel 462 at the bottom of the backrest 3. When a predetermined angle rises, the link member 61 presses the other limit switch 468 to stop.

In this way, the backrest 3 can be prevented from protruding backward by moving forward while lying down. On the other hand, since the sheet surface portion 2 and the footrest portion 7 are shifted at an angle upwardly, the protruding dimension in the forward direction is reduced, and the occupied area can be made smaller than when moving horizontally. In addition, since the shape of the chair main body 4 does not change, the contact position of the body with respect to the backrest part 3 does not change.

Modification of Example 4

6 shows a modification of the fourth embodiment. This modification is based on the pinion 469a disposed near the boundary between the seat surface portion 2 and the backrest portion 3 in the reclining mechanism 406 of the fourth embodiment, and the pinion 469a disposed on the support portion 405. And an additional rack 469b is installed.

The pinion 469a is disposed coaxially with the wheel 462 and is driven to rotate integrally with the wheel 462 by the motor 464. The pinion 469a and the wheel 462 may drive only the wheel 462 or may drive only the pinion 469a. In addition, the chair main body 4 may be supported by the pinion 469a without providing the wheel 462.

Example 5

7 shows a chair according to the fifth embodiment. In the fifth embodiment, the structure of the support portion and the actuator of the fourth embodiment is different, but the rest of the configuration is the same as that of the fourth embodiment. That is, the support part 505 is not a frame structure but a block body including the left and right guide walls 551 and the bottom wall 552 connecting the lower left and right guide walls 551 to the upper surface of the guide wall 551. have. The reclining mechanism 506 is a link member 61 connecting the support portion 505 and the backrest portion 3 and a movement provided near the boundary between the seat surface portion 2 and the backrest portion 3 of the chair main body 4. The wheel 462 as a part is provided, and the wheel 462 at the lower end of the backrest part 3 rotates the upper and left guide walls 551.

The actuator 64 is not rotatable but expands and contracts in the same manner as in the first embodiment, and the actuator 64 is interposed between the support part 505 and the backrest part 3. In the example of illustration, the upper end of the actuator 64 is connected to the intermediate frame 44 provided in the height direction intermediate position of the backrest part 3. The intermediate frame 44 spans between the left and right frames 41 and 41 of the backrest 3. The lower end of the actuator 64 is rotatably connected to the bottom wall 552 of the support part 505.

According to the chair according to the fifth embodiment, when the backrest portion is laid down, the actuator 64 is contracted as shown in FIGS. 7B and 7C. When the actuator 64 contracts, the wheel 462 rotates forward along the left and right guide walls 551, and the lower end of the backrest portion 3 moves forward, and the backrest portion 61 is connected by the link member 61. 3) is tensioned and laid down at an angle. In this way, the backrest 3 can be prevented from protruding backward by moving forward while lying down. On the other hand, since the angle of the seat surface part 2, the footrest part 7, and the seat surface part 3, and the backrest part 3 of the chair main body 4 is fixed, the seat | seat part 3 backs up by the amount which the back part 3 lay down. The surface portion 2 and the footrest portion 7 rise upwards. In addition, since the shape of the chair main body 4 does not change even if the back part 3 is laid down, the contact position of the body with respect to the back part 3 does not change.

Modification of Example 5

8 shows a modification of the fifth embodiment. In this modified example, the actuator 64 is interposed between the support portion 505 and the seat surface portion 2. In the example of illustration, the upper end of the actuator 64 is connected to the intermediate frame 45 provided in the front end of the seat surface part 2. As shown in FIG. The lower end of the actuator 64 is rotatably connected to the bottom wall 552 of the support part 505.

When the backrest part 3 is laid down, the actuator 64 is extended as shown to FIG. 8 (B) and (C). When the actuator 64 extends, the front end of the seat surface portion 2 occurs, the lower end of the back portion 3 moves forward, and the back portion 3 is tensioned by the link member 61 and laid down at a predetermined angle. .

Example 6

9 shows a chair according to the sixth embodiment. Although this chair body is the same as that of Example 1 in this Example 6, the structure of a reclining mechanism is fundamentally different. That is, the reclining mechanism 606 is provided in a diagonal section of the four-section link mechanism 661 connecting the seat surface portion 2 and the support portion 605 of the chair main body 4 and the four-section link mechanism 661. It is set as the structure provided with the actuator 64 of a telescopic structure.

The four-section link mechanism 661 is composed of a pair of left and right front link members 662 and a pair of left and right rear link members 663, and the front link member 662 is formed of the chair body 4. It is interposed between the position slightly biased forward from the center of the seat surface portion 2 and the front end of the support portion 605, and the rear link member 663 is located near the boundary between the seat surface portion 2 and the backrest portion 3 and the support portion ( It is interposed between the intermediate positions of 605.

Upper ends of the front link member 662 and the rear link member 663 are rotatably connected to the fixed plate 662a fixed to the left and right frames 41b and 41b of the seat surface portion 3, and the front link member ( 662 and the lower end of the rear link member 663 are rotatably connected to the support 605 via a bracket.

The front link member 662 is longer than the rear link member 663, and in the position where the backrest 3 stands up, as shown in FIG. 9B, the front link member 662 and the rear part The link member 663 is in a posture in which the upper end is inclined backward from the lower end, and the inclination angle toward the rear is smaller at the rear link member 663. When the front link member 662 and the rear link member 663 are rotated counterclockwise in the drawing with the lower end as a point, the rotation angle side of the rear link member 663 is large, and the backrest portion 3 is In the most laid down position, the top of the front link member 662 is tilted backwards without yet reaching the top position, but the top of the rear link member 663 is in a posture with the top tilted forward beyond the top position. In addition, the lower end of the backrest part 3 is moved forward and the front end of the seat surface part 2 is lifted upward with the operation | movement which lays the backrest part 3 back.

Actuator 64 is the same elastic actuator as Example 1, and is located between the lower position of front link member 662 and the upper position of rear link member 663 within the side views of FIGS. 9B and 9C. Disposed obliquely to the front end of the actuator 64 is rotatably connected to the bracket 651 fixed to the support 605, and the rear end of the actuator 64 is supported by the seat surface portion 2 of the chair body 4 and the backrest. It is rotatably connected to the center of the intermediate frame 43 provided near the boundary of the part 3.

Next, the operation of the sixth embodiment will be described. 9B shows a posture in which the backrest portion stands up. The actuator 64 in this state is in the latest state, and when the backrest part 3 is laid down, the actuator 64 is contracted. When the actuator 64 contracts, the rear link member 663 and the front link member 662 rotate together in the counterclockwise direction, so that the front link member 662 of the front link member 662 is rotated from the upper end of the rear link member 663. Since the displacement of the upper end is larger and the displacement of the rear link member 663 is greater than the displacement of the front link member 662 in front of the front, the lower back portion 3 is lying down backwards. In this case, the front end of the seat surface portion 2 rises upward to prevent the backrest portion 3 from protruding backward, and the occupancy area can be reduced.

The chair of the present invention is suitable for a massage chair having a massage mechanism in the back portion, but is not limited to a massage chair and can be used for various chairs for reclining operation. Further, in the above embodiment, the chair of the present invention has been described by taking a chair having a footrest as an example, but this reclining method can be applied to a chair having no footrest.

According to the present invention, since the reclining mechanism for moving the seat surface portion and the backrest portion forward is provided between the support portion and the chair main body, the seat back portion and the backrest portion are laid with the angle of the seat portion and the backrest portion fixedly fixed. The addition can be prevented from protruding backward. Further, since the seat surface portion rises upward by the amount by which the back portion is laid down, the projected dimension toward the front of the seat surface portion is reduced and the occupied area can be made smaller than when only the back portion is laid down. In addition, since the shape of the chair body does not change even when the back portion is laid down, the position of contact of the body with respect to the back portion does not change.

In addition, the reclining mechanism includes a link member connecting the support portion and the backrest portion, a moving portion provided near the bent portion of the seat surface portion and the backrest portion of the chair body, a guide portion to which the movable portion is movable in the front-rear direction, and the chair body. By having a structure provided with the actuator which changes a posture, a reclining operation | movement can be made to the position of a waist in a fixed position in a sitting position.

In addition, since the actuator is configured to expand and contract, its one end is connected to the moving part of the chair main body and the other end is connected to the support part, so there is no sense of pressure even when the cover is attached to the movable part so that the movable part is concentrated on the support part.

In addition, since the actuator is constructed to expand and contract, the actuator is configured to connect between the support portion and the seat surface portion, whereby the movable portion can be compactly concentrated.

In addition, since the actuator is constructed to be stretched and connected between the support portion and the backrest portion, the backrest portion during reclining can be completely eliminated.

In addition, since the wheel for rolling contact is provided in the moving part, and the actuator is a rotary actuator for rotationally driving wheels such as rubber tires, a special guide part is unnecessary and there is no fear of being caught in the guide part.

In addition, the reclining mechanism is assembled so as to move the seat surface and the backrest to the front support leg and the rear support leg, which are spaced apart from the front and rear of the support portion, so that the posture of the chair body can be changed by the expansion and contraction of the actuator. The appearance is assured, and the weight can be reduced.

In addition, since the actuator is configured to connect between the front support leg of the support portion and the seat surface portion of the chair main body, the movable portion is concentrated under the seat surface portion and becomes inconspicuous.

Moreover, since the support wall which is located to the left and right of the chair main body was provided in the support part, and the reclining mechanism was provided between the support wall and the chair main body, a wall is formed in a side surface, it is easy to protect a movable part, and safety is high.

Moreover, since the guide convex part is fitted in the guide groove so that the slide can slide, the guidance can be ensured.

Further, when the guide has a slope that is lowered toward the front, and the guide for guiding the front portion moving portion has a slope that is increased toward the front, the chair body can be tilted greatly.

In addition, since the reclining mechanism is constituted by the four-section link mechanism and the telescopic actuator, the reclining operation can be performed with a simple configuration.

Moreover, in the said reclining mechanism, since the rack and pinion which mutually engaged between the chair main body and the support part were provided, it can operate reliably without slipping.

In addition, when the massage mechanism is provided in the backrest portion, the adjustment position of the massage mechanism does not change even when the reclining operation is performed, so that the massage position does not need to be adjusted again.

1 is a perspective view showing a skeleton structure of a chair according to the first embodiment of the present invention.

FIG. 2 is a side view (upper part) showing a state where the backrest part of the chair of FIG.

Figure 3 shows a chair according to the second embodiment of the present invention, (A) is a perspective view showing a skeletal structure, (B) is a side view showing a state where the backrest is raised, (C) is a state in which the backrest is laid It is a side view showing.

Figure 4 shows a chair according to the third embodiment of the present invention, (A) is a perspective view showing a skeleton structure, (B) is a side view showing a state where the backrest is raised, (C) is a state in which the backrest is laid It is a side view showing.

Figure 5 shows a chair according to the fourth embodiment of the present invention, (A) is a perspective view showing a skeletal structure, (B) is a side view showing a state where the backrest is raised, (C) is a state in which the backrest is laid It is a side view showing.

FIG. 6: shows the modification of Example 4, (A) is a perspective view which shows skeletal structure, (B) is a side view which shows the state which the backrest part stood up, (C) is a side view which shows the state which the backrest part lay down. .

7 shows a chair according to a fifth embodiment of the present invention, (A) is a perspective view showing a skeletal structure, (B) is a side view showing a state in which the backrest is raised, and (C) is a state in which the backrest is laid It is a side view showing.

Fig. 8 shows a modification of the fifth embodiment of the present invention, (A) is a perspective view showing a skeletal structure, (B) is a side view showing a state in which the backrest is raised, and (C) is a state in which the backrest is laid down. It is a side view showing.

Figure 9 shows a chair according to the sixth embodiment of the present invention, (A) is a perspective view showing a skeletal structure, (B) is a side view showing a state in which the backrest is raised, (C) is a state in which the backrest is laid It is a side view showing.

<Explanation of symbols for the main parts of the drawings>

1: chair

2: seat surface part

3: backrest

4: chair body

5: support

6: reclining mechanism

7: footrest

41: vertical frame

41a: frame part of backrest part

42: horizontal frame

44, 45: middle frame

61: link member

62: roller

63: roller guide

64: actuator

62a: mounting plate

62b: connecting shaft

64a: motor

64b: traditional

64c: load

205: support

251: anterior support leg

152: rear support leg

206: reclining mechanism

262: front roller

163: roller guide

265: rear roller

166: rear roller guide

305: support

351: support wall

306: reclining mechanism

362: front slide convex

365: rear slide convex

363: front guide hole

366: rear guide hole

406: reclining mechanism

405: support

462 wheel

464: motor

451: frame

467, 468: limit switch

469a: pinion

469b: rack

505: support

551: guide wall

552: bottom wall

606: reclining mechanism

661: Section 4 Link Mechanisms

662: front link member

663: rear link member

662a, 663a: fixed plate

605: support

651: bracket

Claims (16)

A chair body having a seat surface portion and a backrest portion, and a support portion supporting the chair body from below; And a reclining mechanism for moving the seat surface portion and the backrest portion forward, with the operation of laying the backrest portion rearward while the angle of the seat surface portion and the backrest portion is fixed. 2. The link member according to claim 1, wherein the reclining mechanism is provided with a link member connecting the support portion and the backrest portion, a movable portion provided near the bent portion of the seat surface portion and the backrest portion of the chair body, and a guide in which the movable portion is movable in the front-rear direction. A chair provided with a part and an actuator which changes the posture of a chair main body. The chair according to claim 2, wherein the actuator is configured to expand and contract, and one end thereof is connected to a moving part of the chair body and the other end is connected to a support part. The chair according to claim 2, wherein the actuator is configured to expand and contract, and is configured to connect between the support portion and the seat surface portion. The chair according to claim 2, wherein the actuator is configured to expand and contract, and is configured to connect between the support portion and the backrest portion. The said support part is provided with the front part support leg and the rear part support leg so that it may be spaced back and forth, The front part moving part which provided the said reclining mechanism in the said front part support leg, and the said seat surface part are provided, The front part guide part in which the front part moving part is assembled to be movable in the front-rear direction, the rear part moving part provided in the rear part supporting leg, and the back part are provided along the backrest part, and the rear part moving part is assembled to be movable in the front-rear direction. And a retractable actuator for connecting the chair main body and the supporting part, wherein the posture of the chair main body is changed by the expansion and contraction of the actuator. The chair according to claim 6, wherein the actuator is configured to connect between the front support leg of the support portion and the seat surface portion of the chair body. The said support body is provided in the support part located on the left-right side of a chair main body, The said reclining mechanism is provided in the front part moving part and the rear part moving part provided in one of a support wall and a chair main body, and the other side, It is installed and supports the front moving part and the rear moving part in the forward and backward direction to guide the front moving part relative to the upper side rather than the rear moving part as the chair body moves forward to lower the posture of the back part. And a flexible actuator configured to connect a guide and the chair body and the support to change the posture of the chair body. The chair according to claim 8, wherein the guide is a guide groove provided in the support wall, and the front moving portion and the rear moving portion are guide convex portions that are slidably inserted into the guide groove. The chair of claim 8, wherein the guide for guiding the rear moving part has an inclination lowering toward the front, and the guide for guiding the front moving part has an inclination increasing for the front. 10. The chair according to claim 9, wherein the guide for guiding the rear moving part has an inclination lowering toward the front, and the guide for guiding the front moving part has an inclination increasing for the front. The chair according to claim 1, wherein the reclining mechanism includes a four-section link mechanism that connects the seat surface portion and the support portion of the chair main body, and an elastic actuator provided in a diagonal direction of the four-section link mechanism. 2. The structure according to claim 1, wherein the reclining mechanism includes a link member connecting the support portion and the backrest portion, a moving portion provided near the bent portion of the seat surface portion and the backrest portion of the chair body, and an actuator for changing the posture of the chair body. The chair characterized by the above-mentioned. The chair according to claim 13, wherein the moving part is provided with a wheel for rolling contact, and the actuator is a rotary actuator for rotationally driving the wheel. The chair according to Claim 13, wherein the reclining mechanism has a pinion disposed near a boundary between a seat surface portion and a backrest portion, and a rack disposed on a support portion and engaged with the pinion. The chair as described in any one of Claims 1-15 used as a massage chair provided with a massage mechanism in a back part.