JP4877182B2 - Chair type stretching machine - Google Patents

Description

  The present invention relates to a chair type stretching machine including a backrest portion and a seat cushion portion.

  2. Description of the Related Art Conventionally, a chair type stretching machine is known that can perform stretching while sitting on a seat cushion portion and leaning back on a backrest portion. For example, Patent Document 1 describes a technique in which a plurality of airbags are disposed on the front surface of the backrest portion and the upper surface of the seat cushion portion, and the airbag is inflated and contracted to push the user and stretch the airbag. .

  However, in the conventional chair type stretching machine described above, each airbag itself is configured to be pushed in while supporting the user, so that the airbag does not hit the target part depending on the body shape and posture of the user. There is a problem that it is difficult to obtain a desired stretch effect.

In order to solve the above problems, means such as arranging a large airbag or arranging a large number of airbags so that the airbag can reliably hit the user regardless of the body shape or posture. Can be considered. However, according to this means, there is a problem that the structure becomes complicated and the chair as a whole is increased in size and cost.
JP 2002-119558 A

  The present invention was invented in view of the above problems, and can be stretched by lifting the body reliably without being affected by the body shape and posture of the user, and the chair as a whole can be made compact and It is an object of the present invention to provide a chair type stretching machine that can reduce costs.

The present invention for solving the above problems is a chair-type stretch machine that includes a backrest portion 1 and a seat cushion portion 2 and is used by a user P sitting on the seat cushion portion 2 and leaning against the backrest portion 1. As a stretching means for lifting and stretching a predetermined part of the user P seated on the seat cushion part 2, a flexible human body support member 8 and a central axis C2 extending in the front-rear direction of the upper surface 2a of the seat cushion part 2 The actuator 11 located between the human body support member 8 and the seat cushion portion 2 protrudes from the freely movable actuator 11 installed at at least one of the left and right positions apart from the gap, thereby applying tension to the human body support member 8. place manner, to fix the left and right ends of the body supporting member 8 to seat cushion portion 2, at least one of the seat cushion of the left right both end portions 2 can be freely attached and detached within a predetermined area, and by changing the fixing position within this predetermined area, the degree of sag in the left-right direction of the human body support member 8 made of the flexible sheet 9 can be changed, and the stretch strength can be freely changed. It is characterized in that the content was.

  According to this, a predetermined portion around the buttocks of the user P can be lifted in a hammock shape by the human body support member 8, and therefore the body can be lifted and stretched without being affected by the body shape and posture of the user P. Can be applied. In addition, since the actuator 11 for lifting the human body support member 8 in this way only needs to be installed in at least one of the left and right sides, the chair as a whole can be made compact and low in cost.

  Moreover, in the chair type stretching machine having the above-described configuration, it is also preferable that the human body support member 8 is made of a hard foam material. By doing in this way, the hit feeling at the time of lifting against the load around the buttocks of the user P can be reduced. In particular, when only one of the left and right actuators 11 is protruded greatly, a large step is generated between the two actuators 11. However, the human body support member 8 made of a hard foam material is deformed so as to fill the step, which makes it uncomfortable. Can be prevented.

  Further, in the chair type stretching machine having the above-described configuration, the protrusion 25 protruding upward from the seat cushion portion 2 is provided on one of the left and right ends of the seat cushion portion 2, and It is also preferable to fix the end portion of the human body support member 8 and to arrange the actuator 11 only on the side opposite to the side where the protrusion 25 is provided in the seat cushion portion 2. By doing in this way, it becomes unnecessary to provide the actuator 11 in both right and left, and cost reduction can be achieved further.

  In the chair-type stretching machine having the above-described configuration, it is also preferable that the actuator 11 includes an airbag 10 that can be expanded and contracted upward. By doing in this way, a soft hit feeling can be given with respect to the user P suspended by the human body support member 8. FIG. In addition, since the airbag 10 is very compact except when it is driven, the airbag 10 and the human body support member 8 are not obstructed except when performing a stretching operation, thereby providing a good sitting comfort. can do.

  The invention according to claim 1 can reliably stretch the body without being affected by the body shape and posture of the user, and further, the chair as a whole can be made compact and low in cost. There is an effect that can be done.

In addition to the effect of the invention according to claim 1, the invention according to claim 2 reduces the feeling of contact when lifting the periphery of the user's buttocks against the load, and particularly projects only one of the left and right actuators. In this case, there is an effect of preventing a sense of incongruity by deforming so as to fill the step between the two actuators.

In addition to the effect of the invention according to claim 1 or 2 , the invention according to claim 3 has an effect that further cost reduction can be achieved.

In addition to the effect of the invention according to any one of claims 1 to 3 , the invention according to claim 4 can give a soft touch to the user, and the air can be used in a case other than when performing a stretching operation. The bag or the like does not get in the way, and there is an effect that a good sitting comfort can be provided.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. The directions such as front, rear, left and right used in the description are based on the user P in the seated state.

  In FIG. 1, the whole chair type stretch machine of an example in embodiment of this invention is shown. The chair type stretching machine of this example includes a backrest portion 1 and a seat cushion portion 2, and a user P sits on the upper surface 2a of the seat cushion portion 2 and leans against the front surface 1a side of the backrest portion 1. It is a chair type stretching machine, and the backrest part 1 is connected to the seat cushion part 2 so that it can be tilted up and down via a built-in drive mechanism 50 (see FIGS. 2 and 3). The chair-type stretching machine of this example is a chair-type massage machine including a massage means described later on the backrest portion 1, but may be configured to include only the stretch means described below without including the massage means. Of course it is good.

  As a massage means with which the backrest 1 is provided, as shown in FIG. 1 (b), FIG. 2, FIG. 3, etc., a box type in which a pair of left and right arms 4 having a treatment element 3 at the tip is projected on the front side. The treatment block 5 is arranged in the backrest 1. A pair of left and right rails 51 extending in the vertical direction are arranged in the backrest portion 1, and the treatment block 5 is driven in the vertical direction in the backrest portion 1 along the rails 51.

  Here, the vertical direction is the vertical direction when the backrest 1 is held upright. In other words, the direction in which the treatment block 5 approaches the seat cushion portion 2 is the downward direction, and the direction in which the treatment block 5 moves away from the seat cushion portion 2 is the upward direction.

  In the center of the front surface 1a of the backrest portion 1 made of a hard molded product, an opening 6 having a rectangular shape in front view formed with the vertical direction as a longitudinal direction is provided, and each of the treatment blocks 5 is passed through the opening 6. The treatment element 3 is protruded to the front side. The opening 6 is provided with a treatment element cover 7 that covers the entire surface of the opening 6 and has a slack, thereby hiding the internal treatment block 5. The treatment element 3 hits the back side of the user P through the treatment element cover 7 and gives various massages such as massage, hitting and abrasion. In FIG. 1 (b), the treatment element cover 7 and stretch means described later are removed.

  Next, the stretching means of this example will be described. The stretch means of this example is provided in both the backrest 1 and the seat cushion 2. The stretch means on the backrest 1 side and the seat cushion 2 side are both stretched and twisted by lifting a part of the user's P body like a hammock with the flexible human body support member 8. It is something to apply.

  First, the stretch means of the backrest part 1 will be described in detail, and then the stretch means of the seat cushion part 2 will be described in detail.

  Stretching means for the backrest 1 is as schematically shown in FIGS. 1A and 5, etc., and extends up and down the flexible sheet 9 constituting the human body support member 8 and the front surface 1 a of the backrest 1. It is formed using an inflatable / contractible bellows-like airbag 10 that is installed at each position spaced apart from the central axis C1 in the left-right direction.

  A flexible sheet 9 made of a fabric or a molded product is fixed to the front surface 1a side of the backrest 1 so as to straddle the central opening 6 covered with the treatment element cover 7 from side to side. The left and right ends are secured to the side of the backrest 1 by sewing. The airbag 10 is disposed so as to be interposed between each flexible sheet 9 and the backrest 1 at both right and left side portions sandwiching the opening 6 of the front surface 1 a of the backrest 1. The bottom surface of the airbag 10 is fixed to the front surface 1 a of the backrest portion 1 with a snap pin or the like, and the front end surface of the airbag 10 is fixed to the back surface of the flexible sheet 9 with a surface fastener (not shown). When the air bag 10 is inflated by air supply, the front end surface protrudes toward the front side, and when the air bag 10 contracts by exhaust after inflation, the front end surface is retracted toward the back side. is there.

  That is, the airbag 10 inflates and protrudes the front end surface to the front side, thereby pushing the flexible sheet 9 positioned facing the front end surface of the airbag 10 to the front side while pressing the flexible sheet 9. An actuator 11 is provided that applies a lateral tension to the sheet 9. Here, the flexible sheet 9 that is tensioned in the left-right direction is tensioned, and a part of the upper half of the user P's body is lifted in a hammock shape and pushed into the front side.

  The amount by which the user P is lifted to the front side by the flexible sheet 9 can be controlled by the expansion amount of the airbag 10 on both the left and right sides (that is, the air supply / exhaust amount). When the airbags 10 on both the left and right sides are greatly inflated as shown in FIG. 5 (b), a part of the body (upper body) of the user P is greatly warped through the flexible sheet 9 that is taut. You can stretch your body. Also, as shown in FIG. 5 (c), when only the left and right airbags 10 are greatly inflated and the flexible sheet 9 is stretched to the left and right, the flexible sheet 9 is A part of the body of the user P can be bent to the left and right sides, and the waist can be rotated to twist the body.

  In this example, the flexible sheet 9 which forms the human body support member 8 is fixed to the upper and lower portions of the backrest 1, and the actuator 11 is formed between each flexible sheet 9 and the backrest 1 as described above. A pair of left and right airbags 10 are provided. And the opening part 6 is located in the location pinched | interposed into this left-right paired airbag 10, and the treatment element 3 is provided through this opening part 6 so that protrusion is possible. Therefore, when the airbag 10 is contracted and the flexible sheet 9 is slackened as shown in FIG. 5 (a) (that is, when the flexible sheet 9 is not stretched), the bag is slackened together. It is possible to apply various massages by applying the treatment element 3 to the body of the user P through the treatment element cover 7 and the flexible sheet 9.

  The basic principle of the stretching means of the seat cushion part 2 is the same as that of the backrest part 1. That is, the stretching means of the seat cushion portion 2 is provided in the front-rear direction of the flexible sheet 9 forming the flexible human body support member 8 and the upper surface 2a of the seat cushion portion 2, as shown in FIGS. It is formed using an inflatable / contractable bellows-like airbag 10 that is installed at each position spaced from the extending central axis C2 in the left-right direction.

  The flexible sheet 9 made of a fabric or a molded product is fixed to the upper surface 2a side of the seat cushion portion 2 so as to straddle the central portion where the user P puts the heel portion from side to side, Both right and left ends are sewn and fixed to the side portion of the seat cushion portion 2. The airbag 10 is disposed so as to be interposed between the flexible sheet 9 and the seat cushion portion 2 at both left and right side portions of the upper surface 2a of the seat cushion portion 2. The bottom surface of the airbag 10 is fixed to the upper surface 2a of the seat cushion portion 2 with a snap pin or the like, and the front end surface of the airbag 10 is fixed to the back surface of the flexible sheet 9 with a surface fastener (not shown). The airbag 10 is inflated by supply air to project the tip surface upward, and is contracted by exhaust after inflation to retract the tip surface downward.

  That is, the airbag 10 of the seat cushion portion 2 is inflated and protrudes the front end surface upward, thereby pushing the flexible sheet 9 positioned facing the front end surface of the airbag 10 upward. An actuator 11 for applying a lateral tension to the flexible sheet 9 is formed. Here, the flexible sheet 9 that is tensioned in the left-right direction and is in a tensioned state is a mechanism that lifts the buttocks of the user P in a hammock shape and pushes them upward.

  The amount by which the user's P's buttocks is lifted upward by the flexible sheet 9 can be controlled by the amount of inflation of the airbag 10 on both the left and right sides (that is, the air supply / exhaust amount). As shown in FIG. 7B, when the airbags 10 on both the left and right sides are greatly inflated, the periphery of the buttocks of the user P can be largely warped through the flexible sheet 9 stretched tightly. Although not shown, when only one of the left and right airbags 10 is greatly inflated, the flexible sheet 9 is stretched to the left and right and is stretched through the flexible sheet 9. The user P can be stretched by bending the periphery of the buttocks to the left and right sides and rotating the waist to twist the body.

  The flexible sheet 9 constituting the human body support member 8 of the seat cushion portion 2 is fixed so that the front end portion is sewn to the seat cushion portion 2 and cannot be moved, and the rear edge portion is fixed to the seat cushion portion 2. It is preferable to provide it as a free end without being fixed. Thereby, when the airbag 10 is inflated, the flexible sheet 9 operates so that the rear side thereof is lifted, and the user P can be effectively stretched.

  The flexible sheet 9 constituting the human body support member 8 of the seat cushion portion 2 is also preferably formed using a hard foam material such as urethane. Thereby, the hit feeling at the time of lifting the periphery of the user's P against a load can be reduced, and a soft stretch feeling can be provided. In particular, when only one of the left and right airbags 10 is greatly inflated, a large step is formed between the two airbags 10, but the flexible sheet 9 made of a hard foam material is deformed to fill this step. It is possible to prevent the user P during twist stretching from feeling uncomfortable.

  FIG. 8 shows a configuration in which air is supplied to and exhausted from the airbags 10 of the backrest 1 and the seat cushion 2. As shown in the figure, each airbag 10 is connected in communication with a pump 12 built in the seat cushion portion 2, and an electromagnetic valve 13 dedicated to each airbag 10 is interposed between each airbag 10 and the pump 12. Yes. The driving of the pump 12 and the opening and closing of each electromagnetic valve 13 are appropriately controlled by the control unit 14 of the chair type stretching machine, whereby the expansion and contraction of each airbag 10 is independently controlled.

  In this example, among the flexible sheets 9 arranged at two places above and below the backrest portion 1, the upper side is the back flexible sheet 9a and the lower side is the waist flexible sheet 9b. Also, the pair of left and right airbags 10 that hit the back flexible sheet 9a is the back airbag 10a, and the electromagnetic valve 13 connected to the back airbag 10a hits the back electromagnetic valve 13a and the waist flexible sheet 9b. A pair of left and right airbags 10 is a waist airbag 10b, and a solenoid valve 13 connected to the waist airbag 10b is a waist solenoid valve 13b. Further, the flexible sheet 9 disposed in the seat cushion portion 2 is a seat flexible sheet 9c, and a pair of left and right airbags 10 that hit the flexible sheet 9c are a seat airbag 10c and a seat. The electromagnetic valve 13 connected to the airbag 10c is a seat electromagnetic valve 13c.

  In order to stretch the user P, first, as shown in FIG. 2 (b), the backrest 1 is largely tilted backward. In this state, the back, waist, and seat airbags 10a, 10b, and 10c are inflated and tension is applied to the back, waist, and seat flexible sheets 9a, 9b, and 9c to lift the body of the user P. For example, as shown in FIG. 3A, a so-called warping operation can be performed in which the entire body is stretched to such an extent that the upper body and the lower leg form an angle of about 150 °. In addition, for example, as shown in FIG. 3 (b), the waist airbag 10b is greatly inflated, so that the body can be stretched to an angle of about 180 ° or more between the upper body and the lower leg. is there.

  FIG. 4 shows various stretching operations. In this figure, the back airbag 10a and the back flexible sheet 9a are omitted. FIG. 4 (a) shows a trunk axis center twisting operation. By tilting the back and seat flexible sheet 9 in the same direction, the upper body and buttocks of the user P are twisted about the trunk axis. To stretch. FIG. 4 (b) shows a twisting and twisting operation. By tilting the back and seat flexible sheet 9 in the opposite direction, the upper body and buttocks of the user P are twisted in the opposite direction to perform stretching. It is like that.

  The stretch means has been described above for the backrest 1 and the seat cushion 2. Below, each modification of the stretch means of the seat cushion part 2 is described. In addition, detailed description is abbreviate | omitted about the structure similar to the structure mentioned above among the structures of each modification, and only a characteristic structure is explained in full detail.

  In FIG. 9, the 1st modification of the stretch means of the seat cushion part 2 is shown. In this modified example, the human body support member 8 and the actuator 11 arranged to apply tension to the human body support member 8 are used as a seat stretch unit 35 that is detachable with respect to the seat cushion portion 2. It is provided separately from the part 2.

  The human body support member 8 of the present modification is a flexible bag member 19 formed by using a fabric or a molded product so as to have a size covering the entire upper surface 2a of the seat cushion portion 2 over the entire surface. 11, a pair of left and right seat airbags 10c is disposed in the bag member 19. An attachment / detachment portion 16 made of a fastener is disposed on the front edge of the bag member 19, and the bag member 19 is attached to the backrest portion 1 through the attachment / detachment portion 16. An air supply hose 17 communicating with the seat airbag 10c is pulled out from the side portion of the bag member 19, and an air supply connection port (see FIG. The seat airbag 10c and the pump 12 are connected in communication with each other.

  Therefore, in the state where the bag member 19 constituting the human body support member 8 is put on the upper surface 2a of the seat cushion portion 2, the left and right direction tension is applied to the bag member 19 by the expansion of the seat airbag 10c, and the same stretch as in one example Can be applied. Although not shown in the figure, the front and rear positions of the stretch unit 35 can be changed in a plurality of stages by providing the attachment and detachment portions 16 in a plurality of rows close to the front and back and appropriately selecting the row of the attachment and detachment portions 16 used for attachment. can do. If stretching is not performed, the stretching unit 35 may be removed.

  In FIG. 10, the 2nd modification of the stretch means of the seat cushion part 2 is shown. In this modification, the attachment / detachment portion 20 made of a hook-and-loop fastener is provided on the inner surfaces of the left and right end portions of the seat flexible sheet 9c constituting the human body support member 8. At the left and right side portions of the seat cushion portion 2, there are provided attachable / detachable portions 21 made of surface fasteners, and the attachable / detachable portions 20 and attachable / detachable portions 21 that are corresponding surface fasteners are detachably engaged so as to be flexible. The left and right ends of the seat 9 are fixed to the seat cushion 2.

  Therefore, in a state where the flexible sheet 9c constituting the human body support member 8 is fixed to the seat cushion portion 2, tension is applied to the flexible sheet 9c by the expansion of the seat airbag 10c, and the same stretch as in the example is performed. be able to. Moreover, since the attaching / detaching part 20 can be engaged with the attachable / detachable part 21 in a predetermined region in the front-rear direction and the up-down direction, the degree of sagging in the left-right direction of the flexible sheet 9c is changed by changing the engaging position in the up-down direction. It is possible to adjust the strength of the stretch by changing, or to change the lifting position of the user P by changing the engagement position in the front-rear direction.

  Note that only one of the left and right end portions of the flexible sheet 9c may be detachable from the seat cushion portion 2. Even in this case, the strength of the stretch can be adjusted by changing the engagement position of the detachable portion 20 with respect to the attachable / detachable portion 21 in the vertical direction.

  In FIG. 11, the 3rd modification of the stretch means of the seat cushion part 2 is shown. In this modification, the same stretch effect can be obtained not only by the pair of left and right seat airbags 10c constituting the actuator 11 but also by a structure provided only on one side.

  Specifically, a protrusion 25 protruding above the upper surface 2a of the seat cushion portion 2 is provided on one of the left and right ends of the seat cushion portion 2 (the left end portion in the illustrated example). The seat airbag 10c is supported on the upper surface 2a of the seat cushion portion 2 at a portion on the opposite side (right side) in the left-right direction from the side on which the protrusions 25 are provided. Then, one end (left end) of the seat flexible sheet 9c constituting the human body support member 8 is fixed to the tip of the protrusion 25, and the seat airbag 10c is sandwiched between the seat cushion portion 2 and the seat cushion portion 2. Thus, the other end portion (right end portion) of the flexible sheet 9 is fixed to the side portion of the seat cushion portion 2.

  Therefore, when the seat airbag 10c is inflated and protrudes upward, the flexible sheet 9c is given a lateral tension as shown in FIG. A stretch effect can be obtained by lifting a part of the body of the user P in a hammock with the flexible sheet 9c in a state of being tensioned by this tension. It should be noted that the amount of protrusion of the tip surface when the seat airbag 10c is inflated is set to be approximately the same as the amount of protrusion of the protrusion 25 upward from the tip. The same configuration as this modification can be applied to the stretching means of the first and second modifications.

  In FIG. 12, the 4th modification of the stretch means of the seat cushion part 2 is shown. In this modified example, as a stretching means for lifting and stretching a predetermined part of a user seated on the upper surface 2a of the seat cushion portion 2, a seat flexible sheet 9c constituting a human body support member 8, and a seat cushion The left and right projections 30 projecting upward from the upper surface 2a of the portion 2 and a drum-shaped winder 31 that winds the flexible sheet 9c from the lower sides of the outer sides of the tips of the projections 30. Yes.

  The winder 31 is installed at both the left and right ends of the seat cushion portion 2, and winds the flexible sheet 9 to the left and right sides so as to apply a lateral tension to the flexible sheet 9 and move upward. The actuator 11 is made to be slack and to allow the flexible sheet 9 to sag by rewinding the flexible sheet 9 from both left and right sides.

  Therefore, when the winder 31 is driven and tension is applied to the flexible sheet 9c as shown in FIG. 12B, the user P holds the buttocks by the flexible sheet 9c that is tensioned by this tension. It can be lifted up in a hammock shape to obtain a stretch effect. At this time, by winding up from the left and right sides at substantially the same speed, the user's P buttocks can be lifted straight upward without rubbing the treatment element cover 7 left and right.

  Next, a modified example of the actuator 11 using the airbag 10 will be described. Although the actuator 11 on the backrest 1 side will be described below, the same configuration can be applied to the actuator 11 on the seat cushion 2 side. In addition, detailed description is abbreviate | omitted about the structure similar to the structure mentioned above among the structures of each modification, and only a characteristic structure is explained in full detail.

  In the modification shown in FIG. 13 (a), a plate-like hard plate is attached to the front end surface of the bellows-like airbag 10 whose bottom surface is fixed to the front surface 1a of the backrest portion 1 (the upper surface 2a in the case of the seat cushion portion 2). The member 40 is fixed. A flexible sheet 9 constituting the human body support member 8 is fixed to the front surface of the hard member 40, and the upper and lower ends of the hard member 40 are rotatable with one end portions of plate-like hard support members 41 and 42, respectively. It is connected to. The other end portion of the lower rigid support member 41 is rotatably connected to the front surface 1a of the backrest portion 1, and the other end portion of the upper rigid support member 42 is slidable up and down on the front surface 1a of the backrest portion 1. (In the case of the seat cushion portion 2, it is slidable back and forth) and is connected to a linearly moving slide member 43 rotatably.

  When air is supplied to the airbag 10 and inflated, the hard support members 41 and 42 on both sides rotate so as to project the front end portion to the front while sliding the linear motion slide member 43 downward, and are flexible. The sheet 9 is pushed into the front side and tension is applied. At this time, the proportion of the component force supported by the hard support members 41 and 42 out of the external force received by the airbag 10 from the user P as the hard support members 41 and 42 approach the posture of standing on the front surface 1a of the backrest 1. Becomes larger. That is, since the component force received by the airbag 10 is reduced, the user P can be lifted with a small driving force.

  In another modification shown in FIG. 13 (b), one end of a plate-like hard support member 44 is rotatably connected to the front surface 1a of the backrest 1 and the other end side of the hard support member 44 is connected. The flexible sheet 9 is fixed to the part. And between the part which fixes the front-end | tip surface of the bellows-like airbag 10 fixed to the front surface 1a of the backrest part 1 to the backrest part 1 of the rigid support member 44, and the part to which the flexible sheet | seat 9 is fixed. It is fixed to the part.

  When air is supplied to the airbag 10 and inflated, the hard support member 44 rotates so as to project the other end side to the front, and pushes the flexible sheet 9 to the front side to apply tension. . At this time, the flexible sheet 9 can be lifted with a large stroke that is greater than or equal to the protruding amount of the airbag 10 by the lever principle via the hard support member 44 to apply tension.

The chair type stretch machine of an example in embodiment of this invention is shown, (a) is a whole perspective view, (b) is a perspective view of the state which removed the treatment element cover and the stretch means. It is a side view of the use state of a chair type stretch machine same as the above, (a) is the state which stood the backrest part, (b) is the state which fell the backrest part. It is a side view which shows the whole body stretch by the chair type stretch machine same as the above, (a) is the state which extended the whole body to about 150 degrees, (b) is the state which extended the whole body to about 180 degrees. It is a perspective view which shows the various stretching operation | movement by the chair type stretching machine same as the above, (a) has shown bodily sensation axis center twisting operation | movement, (b) has staking twisting operation | movement. It is operation | movement explanatory drawing of a chair type stretch machine same as the above, (a) is the state which shrunk both airbags, (b) is the state which inflated both airbags, (c) is inflating one airbag. It is the state made to do. It is a front view which shows the stretch means of the seat stretch part of a chair type stretch machine same as the above. It is operation | movement explanatory drawing of a stretch means same as the above, (a) is the state which contracted the airbag together, (b) is the state which expanded both airbags. It is a functional block diagram of a chair type stretching machine same as the above.

It is a front view which shows the 1st modification of the stretch means of the seat cushion part of a chair type stretch machine same as the above. It is explanatory drawing of the 2nd modified example same as the above. It is operation | movement explanatory drawing of a 3rd modification same as the above, (a) is the state which contracted the airbag, (b) is the state which expanded the airbag. It is operation | movement explanatory drawing of a 4th modification same as the above, (a) is the state which slackened the human body support member, (b) is the state which provided the tension | tensile_strength to the human body support member. It is a side view which shows the modification of an actuator with which a chair type stretching machine same as the above is shown, (a) is a 1st modification, (b) is a 2nd modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Backrest part 2 Seat cushion part 8 Human body support member 9 Flexible sheet 10 Air bag 11 Actuator 25 Projection body 31 Winder 35 Stretching unit C2 Center axis P User

Claims (4)

A chair-type stretching machine that has a backrest and a seat cushion, and is used by a user sitting on the seat cushion and leaning against the backrest, lifting a predetermined part of the user seated on the seat cushion As a stretching means for stretching the body, a flexible human body support member and a projecting actuator installed at least at one of the left and right sides with a gap from the central axis extending in the front-rear direction of the upper surface of the seat cushion portion are provided. The actuator located between the support member and the seat cushion part is arranged so as to protrude and apply tension to the human body support member, and the left and right ends of the human body support member are fixed to the seat cushion part, and at least One is removable from the seat cushion part within a predetermined area, and by changing the fixed position within this predetermined area, Change the lateral direction of the slack condition of the human body support member made of FLEXIBLE sheet, the chair type stretching machine, characterized in that the freely change the stretch strength. The chair type stretching machine according to claim 1, wherein the human body support member is made of a hard foam material. A protrusion projecting upward from the seat cushion is provided on one of the left and right ends of the seat cushion. The end of the human body support member is fixed to the tip of the protrusion, and the actuator is connected to the seat cushion. The chair-type stretching machine according to claim 1 or 2, wherein the chair-type stretching machine is disposed only on a side opposite to the side on which the protrusion is provided. The chair type stretching machine according to any one of claims 1 to 3, wherein the actuator comprises an airbag that is inflatable and expandable upward.

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