JPH10262780A - Chair and chair type massage machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a distance at which a gravity center position of a user transfers backward by reclining, and prevent a seat back part from becoming unstable by connecting these so that a seat surface part moves forward when the seat back part is brought down backward and the seat surface part moves backward when the seat back part is returned to a former condition. SOLUTION: When a rocking driving device 26 is extendedly operated, a driving link 25 is pushed up forward, and a lower frame 17 swings so that the lower side is pulled out forward, and a seat back part 7 reclines backward thereby. At this time, a seat frame 18 of a seat surface part 8 is held by a main body frame 15 through a guide member 28 so as to be longitudinally freely movable, and since a rear part of this seat frame 18 is connected to the lower frame 17 so as to freely perform bending operation, the seat surface part 8 is also pushed out forward. According to this, a distance at which a gravity center position of a user transfers backward by reclining can be shortened, the seat back part 7 can be prevented from becoming unstable even if it is brought down backward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair and a chair-type massage machine.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 7 and 8, a chair-type massage machine 100 has a backrest portion 101, a seat surface portion 102, a chair body 105 having a footrest 103, and a backrest portion 101 and the like. Massage drive unit 10
6 is provided. This massage drive 10
Numeral 6 allows the operating element 108 such as a fir ball to perform a massage operation configured as a single or an appropriate combination of a reciprocating motion, a lateral motion, a vertical motion, a vibration, and the like.

[0003] The backrest 101 is provided with a guide frame 111 inside the backrest 110 in addition to a backframe 110 for forming a frame having an outer shape. The guide frame 111 is provided with a rail member (not shown) whose longitudinal direction is directed to the height direction of the backrest 101, and the massage driving unit 106 is arranged along the rail member.
Can be repositioned.

In the chair body 105, the backrest 1
Reference numeral 01 is connected to a rear side of the seat surface portion 102 in a fixed state via a fulcrum 112 provided at the same level as the seat surface portion 102, and can swing back and forth for reclining. In addition, the footrest 103 is provided with the seat 10
2 are connected via a fulcrum 113 provided at the lower part of the front end, and the position can be changed between an upper position and a lower position.

In general, the swinging of the backrest portion 101 is often mechanically performed by a swinging drive device 115 such as an electric mechanism or a fluid pressure cylinder, but the position of the footrest 103 can be changed by an operation handle. In many cases, the structure is a manual operation involving the operation of 116 (see FIG. 7).

[0006]

In the chair type massage machine 100 as described above, the following six problems have been pointed out. The first point is that when reclining, the center of gravity moves rearward of the chair and becomes unstable, giving anxiety to the user.

In the state shown in FIG. 7, the center of gravity of the user and the entire massage machine 100 is at position A, and the center of gravity of the upper body of the user is at position B1. At this time, when the load on the center of gravity A is M1, the load on the center of gravity B1 is M2, the horizontal distance between the rear end X of the leg 118 and the center of gravity A is L1, and the horizontal distance between X and the center of gravity B1 is L2. , The moment acting on the center of gravity A is M1 × L1, and the moment acting on the center of gravity B1 is M2 × L2. Since both of these moments act forward with respect to the rear end X of the leg, there is no instability behind the chair.

However, when the backrest 101 is lowered, the center of gravity of the upper body of the user is accordingly moved to the fulcrum 112.
And moves rearward along an arc trajectory with a radius r, and becomes the position B2 in FIG. At this time, since the moment M2 × L2 acting on the center of gravity B2 acts behind X,
The moment of instability for the chair. This M2 × L
If 2 is greater than the moment M1 × L1 acting on the center of gravity B, which is the stability moment for the chair, instability behind the chair will occur with X as a fulcrum.

That is, in the range of stability moment (M1 × L1)> instability moment (M2 × L2), the chair is in a stable state, and stability moment (M1 × L1) <instability moment (M2 × L2). In the range, the chair is in an unstable state.

For this reason, the rear end X of the leg 118
Must be extended backwards. Therefore, the massage machine 10
0, resulting in inconvenience in handling, storing or transporting. The second problem is that when the backrest portion 101 is greatly reclined backward during reclining, the elbow rest portion 120 is lowered.
There is a gap between the rear end of the backrest 101 and the front surface of the backrest 101, and this causes the elbow rest 120 to appear to be interrupted, resulting in a poor appearance.

In order to prevent this, the elbow rest 120
May be lengthened rearward, but this is not preferable because the appearance when the backrest 101 is erected is deteriorated and the size of the massage machine 100 is increased. The third problem is that the position change of the footrest 103 is troublesome because it is a manual operation, and there are only two positions that can be changed, an upper position and a lower position. I can't respond.

A fourth problem is that the height cannot be adjusted for users of different heights because the seat surface 102 is fixed. For this reason, conventionally, one or both of the fact that the foot floats off the floor when the user is short and that the user has to throw the foot forward when the user is tall are conventionally considered. It was possible.

[0015] The fifth problem is that when packing the massage machine 100, the packing appearance becomes large. That is, the shape is not suitable for stacking when the backrest portion 101 is in an upright state, and it becomes bulky in the vertical direction, and becomes rather long when the backrest portion 101 is laid down. This means a large mounting area. Therefore, costs are increased in transportation and inventory management, and handling of transportation and the like is difficult.

The sixth problem is that the guide frame 111 for moving the massage drive unit 106 in the backrest unit 101 is separately required, so that the number of parts is increased, the structure is complicated, and assembly and maintenance are required. Is that it is troublesome. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a chair and a chair-type massage machine capable of solving each of the various problems described above.

[0015]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, in a chair having a main body frame, a backrest portion provided to be reclineable on the main body frame, and a seating surface portion, the backrest portion and the seating surface portion fall when the backrest portion is tilted backward. The seat portion is connected so that the seat portion moves forward and the seat portion moves rearward when the backrest portion is returned from the state in which the backrest portion is tilted rearward to the original state.

[0016] Therefore, when the backrest portion is tilted backward,
The seating surface moves forward, and conversely, when the backrest is set in the original state, the seating surface also returns to the original rear position. As described above, since the seat surface portion moves back and forth in accordance with the reclining, the amount by which the position of the center of gravity of the user shifts rearward due to the reclining can be reduced or not shifted.

Thus, it is possible to prevent the rear end of the leg from being lengthened rearward, and there is no inconvenience in handling, storing or transporting the chair.
This leads to the solution of the problem. Further, according to the present invention, on both sides of the seat surface portion, there are provided elbow rest portions which do not create a gap with the front surface of the backrest portion during reclining.

Therefore, in the case where the armrests are provided on both sides of the seating surface, the backrest can be reclined rearward by reclining without having to lengthen the armrests rearward. It does not create a gap between the front surface and the rear end of the elbow rest. Therefore,
Deterioration of the appearance at the time of reclining, enlargement of the chair, and the like can be prevented, and the second problem can be solved.

In the case where the footrest is connected to the front portion of the seat surface so as to be able to bend freely, the footrest bends upward when the backrest is tilted rearward, and the backrest is tilted rearward. When returning from the state to the original state, it is connected to the seat surface so as to bend downward. With this configuration, when the backrest portion is tilted backward, the footrest is pushed forward, and therefore, is flipped up. Conversely, when the backrest portion is returned to the original state, the footrest is raised. It will be pulled back, and will therefore return downward.

As described above, the footrest automatically moves up and down in accordance with the reclining, and the movement is performed steplessly or in multiple steps as in the case of the inclination of the backrest. . Therefore, the trouble of changing the position of the footrest can be eliminated and the position can be adjusted flexibly, so that the third problem is solved.

When a height adjusting means is provided at the lower portion of the chair body so that the seating surface level can be changed according to the user, fine height adjustment can be performed in response to requests of users of different heights. Therefore, the fourth problem can be solved. As the height adjusting means, various types can be considered, such as a method of attaching and detaching auxiliary legs and the like as needed, and a method of using a jack-up mechanism by adjusting the screwing of a lever or a screw.

The following structure can be employed for the backrest. That is, a lower frame separate from the lower frame is provided on the lower side of the back frame, which is an outer frame in the backrest, and the reclining operation on the main body frame is performed by the lower frame. The back frame can be tilted forward with respect to the lower frame toward the seat surface side, and the back frame and the lower frame can be combined with each other or released by switching the lock mechanism.

With such a configuration, the connection structure for the seat surface and the footrest can be provided only for the lower frame, and the back frame can be in a state where it does not interfere with these connection structures. Therefore, when the whole chair is packed, it is possible to obtain a packing form that has a simple rectangular parallelepiped outer shape, does not bulk up in the vertical direction, and has a small mounting area in the horizontal direction.
As a result, stacking in the packed state is facilitated, cost can be reduced in transportation and inventory management, and handling of transportation and the like can be facilitated. Therefore, the fifth problem can be solved. it can.

When the backrest can be moved forward, various advantages can be obtained even when the chair is not used, especially when the chair is stored or transported, because of its compactness. When a massage drive is provided in the backrest of the chair body, the massage drive can be moved in the height direction of the backrest using the back frame itself provided in the backrest as a guide. In addition, the guide frame of the conventional chair-type massage machine can be dispensed with and the structure of the back frame can be simplified, so that the sixth problem can be solved.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. A chair-type massage machine 1 as an example of a chair according to the present invention includes a chair body 2 as shown in FIG.
And a massage drive unit 3 provided on the chair body 2. In addition, as for the massage drive part 3, the installation position, structure, operation principle, etc. are not limited at all, but as an example, the operator 4 using a roller or the like rotatable around the horizontal axis may be used. A driving operation (not shown) such as an air actuator, an electric motor, or an electromagnetic vibrator may perform a massage operation configured alone or in an appropriate combination of reciprocating movement, lateral movement, vertical movement, vibration, and the like. it can.

The chair body 2 has a backrest 7, a seat 8 and a footrest 9, and a leg 11 having an elbow rest 10 integrally on both sides of the seat 8. Is provided. Further, the chair body 2 is provided with a height adjusting means 12 which can be attached to and detached from a lower part of the chair if necessary. In the height adjusting means 12 in the illustrated example, a resin-made auxiliary leg 13 is provided on the front side.
And a caster 14 with a stopper (not shown) on the rear side is used. Therefore, caster 1
If the stopper is released in 4, the massage machine 1 can be easily moved simply by making the front side of the chair body 2 float.

Each of the auxiliary legs 13 and the casters 14 is screwed into the chair main body 2 so that the level of the seat surface portion 8 can be set to 50 m between when it is attached and when it is removed.
m, can be changed. In addition, auxiliary leg 1
The 3 and the casters 14 may be arranged in reverse,
All may be unified with the auxiliary leg 13 or the caster 14. In addition, as the height adjusting means 12, it is also possible to use an automatic or manual jack-up mechanism by adjusting the engagement of a lever or a screw, etc., so that the height adjusting means 12 is not attached to or detached from the chair body 2.

The jack-up mechanism for adjusting the screw engagement is more preferable because the height can be adjusted steplessly. As shown in FIGS. 1, 2, and 5, a main body frame 15 is provided inside the chair main body 2 so as to cross the space below the seat 8 from inside the legs 11 on both sides. I have.

The backrest portion 7 includes a back frame 16 for forming a frame having an outer shape, and a back frame 16
Frame 1 provided to hold the lower side of the
7 are provided. Similarly, the seat surface portion 8 has a seat frame 18 for forming a frame of the outer shape, and the footrest 9 has a footrest frame 19 for forming a frame of the outer shape.

The back frame 16 and the lower frame 17 of the backrest 7 are normally combined with each other, and are provided so as to be able to swing back and forth with respect to the main body frame 15 via a swing fulcrum 23. This back and forth swing causes the backrest 7
Reclining will be performed. The main body frame 15 is provided with a support portion 15a for providing the swing support point 23 as shown in FIG. 5, but this support portion 15a does not complicate the drawings in FIGS. Omitted for clarity.

Between the lower end of the lower frame 17 and the lower front part of the main body frame 15, a drive link 25 bent in an L-shape is bridged at both ends as connecting fulcrums 25a and 25b. An oscillating drive device 26 such as an electric mechanism or a fluid pressure cylinder is appropriately provided between the intermediate position of the main trunk portion of the drive link 25 and the lower central portion of the main body frame 15. The main part of the drive link 25 is substantially horizontal when the backrest 7 is upright (the state shown in FIG. 1).

With such a structure, if the swing driving device 26 is extended from the state shown in FIG.
5 is pushed forward around the connecting fulcrum 25a,
Therefore, the lower frame 17 swings about the swing fulcrum 23 so that the lower side thereof is pulled forward.
Therefore, the backrest 7 is tilted backward as shown in FIG. 2, that is, reclined.

Conversely, if the swing driving device 26 is caused to retract from the state shown in FIG.
Therefore, the lower frame 17 swings about the swing fulcrum 23 so that the lower side thereof is pushed rearward. Therefore, the backrest 7 is returned to the original standing state. The seat frame 18 of the seat surface portion 8 is provided with a guide member 28
And is held movably back and forth through the. Further, the rear portion of the seat frame 18 is attached to the lower frame 17 of the backrest portion 7.
On the other hand, it is connected to bend freely through a bending fulcrum 29 provided below the swing fulcrum 23.

Therefore, when the backrest 7 is tilted backward during reclining as described above, the seat 8 is also pushed forward as the lower side of the lower frame 17 swings forward. Conversely, when the backrest 7 is returned to its original standing state, the seating surface 8 is also returned to the original rearward position as the lower side of the lower frame 17 is returned to the rear.

As described above, the seat surface portion 8 automatically moves back and forth in accordance with the reclining (the swing of the backrest portion 7), and the amount by which the position of the center of gravity of the user shifts rearward by the reclining becomes shorter. ing. In addition, as described above, the swinging fulcrum 23 of the backrest portion 7 is connected to the backrest portion 7 and the seat surface portion 8.
4 is provided separately from the bending fulcrum 29, and is disposed above the bending fulcrum 29. Thus, as shown in FIG. However, there is no gap between the front surface and the rear end of the elbow rest 10. Therefore, it is not necessary to lengthen the elbow rest 10 backward.

The footrest frame 1 of the footrest 9
Numeral 9 is connected to the front end of the seat frame 18 via a bending fulcrum 32 to bend freely. As shown in FIG. 5, the lower frame 17 of the backrest 7 is provided with a bracket 33 on its lower end surface, and the lower surface of the bracket 33 and the footrest frame 19 on the forward side of the bending fulcrum 32. The link 34 is bridged between the two positions as connecting fulcrums 34a and 34b.

In the lower frame 17, the bracket 3
3 and the link 34 are connected to the lower frame 1
Needless to say, it is lower than the bending fulcrum 29 where the seat 7 and the seat frame 18 of the seat surface portion 8 are connected. With such a structure, when the backrest 7 is tilted backward during reclining as described above, the footrest 9 also jumps up to the upper position as the lower side of the lower frame 17 swings forward. Become like Conversely, when the backrest 7 is returned to its original standing state, the footrest 9 is also returned to the lower position as the lower side of the lower frame 17 is returned to the rear.

As described above, the footrest 9 is automatically moved up and down in accordance with the reclining (the swing of the backrest 7), and the movement thereof is stepless like the inclination of the backrest 7. Target or multi-step. By the way, as shown in FIG. 5, the back frame 16 of the backrest portion 7 is provided with a movement drive portion 38 that enables the massage drive portion 3 to move along the height direction of the backrest portion 7.

The movement driving section 38 is provided between a reinforcing bar 40 provided near the upper portion of the back frame 16 and a lower plate 41 provided at a lower end portion of the back frame 16, and a feed screw 43.
Is rotatably provided, and the feed screw 43 is screwed into a nut member 44 provided in the massage driving section 3, and the feed screw 43 is provided with an electric motor or the like provided on the lower plate 41 of the back frame 16. By the driving unit 45
It is made to be able to rotate in the reverse direction. The massage driving section 3 is movably held by the back frame 16 itself as a guide.

Therefore, by appropriately controlling the rotation direction, rotation speed, rotation amount, and the like of the feed screw 43 by the driving unit 45, the position of the massage drive unit 3 can be changed to the user's neck or waist, To reciprocate continuously,
The operator 4 can be stopped at the acupoint position or the like. It is to be noted that, as the movement drive unit 38, other linear drive means such as a winding drive mechanism, a meshing structure of a rack and a pinion, or a fluid pressure cylinder can also be adopted.

As described above, the entire movement driving section 38 is provided for the back frame 16 (that is, provided without having any relation to the lower frame 17). In addition, as the backrest 7, a connection structure to the seat surface 8 and the footrest 9 is provided to the lower frame 17. For this reason, the back frame 16 can be swung from the lower frame 17 in the forward leaning direction as necessary without causing any positional interference with the movement drive unit 38 and various connection structures. Has become.

The swing fulcrum that allows the back frame 16 to fall forward is a swing fulcrum 23 (FIG. 1) for swinging the backrest 7 relative to the main frame 15 for reclining.
And FIG. 2), the structure is provided coaxially therewith, thereby simplifying the structure. That is, as described above, the lower frame 17 sandwiches the lower side of the back frame 16 from both left and right sides thereof. A table 48 is provided, and the swing fulcrum 23 of the lower frame 17 is penetrated to the left and right.
9 is skewered.

The swing fulcrum enabling the back frame 16 to fall forward can be provided at a position different from the swing fulcrum 23. On the other hand, as shown in FIG. 6, a lock mechanism 53 is provided between the lower plate 41 of the back frame 16 and the lower rail 52 of the lower frame 17. The lock mechanism 53 has a hook operating tool 55 provided on the back frame 16 side and a receiving tool 56 provided on the lower frame 17 side.

The stopper 56 is connected to the pivot 49 (FIG. 5).
(See FIG. 2), the locking bar 58 is held parallel to the axial direction, and the locking bar 58 is projected rearward. On the other hand, the hook operating tool 55 holds a hook tool 60 that can be engaged with the locking bar 58 of the receiving tool 56, and swingably around a pivot 61 that is parallel to the locking bar 58. And a bracket member 62 that performs the operation.

On the pivot 61, a hook 60 is provided with a locking bar 5.
A spring 64 for generating a biasing force in a direction for maintaining the state of engagement with the spring 8 is externally fitted. In addition, hook device 60 includes
An operation lever 65 for operating the swing is protruded rearward. With such a structure, if the operation lever 65 of the hook operation tool 55 is pulled upward from the state shown by the solid line in FIG. 6 and the upper side of the back frame 16 is pushed forward as it is, the swinging motion as shown in FIG. The backrest portion 7 can be tilted forward toward the seat surface portion 8 around the pivot point 23.

Therefore, the height H and the depth L of the massage machine 1 as a whole can be made compact, and the outline shape can be easily made into a rectangular parallelepiped package. In addition, the backrest 7 is raised in the opposite direction from this state, and the operation lever 65 of the hook operating tool 55 is once pulled up, and the hook operating tool 55 is brought into contact with the locking lever 58. If the operator releases the operation lever 65, the back frame 16 and the lower frame 17 can be locked again in a state where they are united with each other.

The present invention is not limited to the above embodiment. For example, the massage driving unit 3
It can also be provided for the seat portion 8, the footrest 9, and the like, and the detailed structure thereof can be appropriately changed. In addition, the present invention is not limited to the chair-type massage machine as in the above embodiment, but is applicable to other reclining chairs such as a barber shop chair and a home chair.

[0048]

As is apparent from the above description, in the chair type massage machine according to the present invention, the seat surface is moved back and forth in accordance with the swing of the backrest during reclining. The amount by which the center of gravity shifts rearward by reclining can be reduced or not shifted. Therefore, it is possible to suppress the rear end of the leg portion from being lengthened rearward, and there is no inconvenience in handling, storing, or transporting the massage machine, thereby solving the first problem of the related art. Leads to.

When this structure is employed, even when the backrest portion is tilted backward, no gap is formed between the front surface and the rear end of the elbow rest portion. There is no need to increase the length. Therefore, it is possible to prevent the appearance from deteriorating at the time of reclining, to increase the size of the massage machine, and to solve the second conventional problem.

If the footrest is configured to automatically move up and down in accordance with the swing of the backrest portion during reclining, not only the labor involved in changing the position of the footrest but also the movement of the backrest can be reduced. It will be performed in a stepless or multi-step like the degree of inclination of the part,
Flexible positioning can be achieved. Therefore, the conventional 3
It is possible to solve the problem of the dot.

If the height adjusting means is provided at the lower part of the chair body, the height can be finely adjusted in response to requests of users of different heights, so that the conventional fourth problem can be solved. . In the backrest section, if the lower frame is provided on the lower side of the back frame so that only the back frame can be moved forward, when packing the entire massage machine, it has a clean rectangular parallelepiped outer shape, and Since it is possible to form a compact packing in the horizontal and vertical directions, stacking in the packed state becomes easy, cost reduction in transportation and inventory management can be achieved, and handling of transportation and the like can be facilitated. Therefore, the conventional fifth problem can be solved.

When the backrest can be moved forward as described above, various advantages can be obtained even when the massage machine is not used, particularly when it is stored or transported, because of its compactness. When a massage drive is provided on the backrest, the massage drive can be moved in the height direction of the backrest using the back frame itself as a guide, so that the conventional guide frame can be eliminated and the structure of the back frame can be simplified. Thus, the sixth problem of the related art can be solved.

[Brief description of the drawings]

FIG. 1 is a side perspective view showing the internal structure of a massage machine according to the present invention.

FIG. 2 is a side perspective view showing a state of reclining from the state of FIG. 1;

FIG. 3 is a perspective view showing the appearance of the massage machine according to the present invention.

FIG. 4 is a side view showing a swing pattern of the backrest portion in the front-back direction in the massage machine according to the present invention.

FIG. 5 is an exploded rear perspective view showing an attachment state of a backrest (a back frame and a lower frame) to a main body frame.

FIG. 6 is an enlarged side sectional view showing a lock mechanism provided between the back frame and the lower frame in the backrest portion.

FIG. 7 is a side perspective view showing an internal structure of a conventional chair-type massage machine.

8 is a side perspective view showing a state where the vehicle is reclined from the state shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Massage machine 2 Chair main body 3 Massage drive part 7 Backrest part 8 Seat part 9 Footrest 10 Elbow rest part 12 Height adjustment means 15 Body frame 16 Back frame 17 Lower frame 23 Swing fulcrum 29 Bend fulcrum 32 Bend fulcrum 34 Link 53 Lock mechanism

Claims (7)

[Claims] 1. A chair having a main body frame (15), a backrest portion (7) removably provided on the main body frame (15), and a seat surface portion (8), wherein the backrest portion (7) is provided. ) And the seat portion (8) are such that when the backrest portion (7) is tilted backward, the seat surface portion (8) moves forward, and the backrest portion (7) is tilted rearward from the original state. A chair characterized in that the seat (8) is connected so as to move rearward when returned to the state. 2. An armrest (10), which does not create a gap with the backrest (7) during reclining, is provided on both sides of the seat (8). The chair according to claim 1, characterized in that: 3. A footrest (9) is connected to the front of the seat surface (8) so as to be able to bend with respect to the seat surface (8), and the footrest (9) is connected to a backrest ( When the backrest (7) is returned to the original state from the state in which the backrest (7) is tilted rearward, the seat surface ( The chair according to claim 1 or 2, wherein the chair is connected to (8). 4. A height adjusting means (12) provided at a lower portion of the chair body (2) so as to be able to change a level of a seat portion (8) according to a user. The chair according to any one of claims 1 to 3. 5. A backrest (7) of the chair body (2).
Is a lower frame (17) serving as a basis for a reclining operation with respect to the main body frame (15), and a back frame ( 16), and a lock mechanism (53) is provided between the lower frame (17) and the back frame (16) to switch the combination or release of the two. The chair according to any one of claims 1 to 4, wherein the chair is provided. 6. A chair type massage machine having a main body frame (15), a backrest portion (7) provided on the main body frame (15) so as to be reclined, and a seat surface portion (8). The portion (7) and the seating surface (8) are in a state where the seating surface (8) moves forward when the backrest (7) is tilted rearward, and the backrest (7) is tilted rearward. A chair-type massage machine characterized in that the seat portion (8) is connected so as to move rearward when it is returned to its original state. 7. A backrest part (7) of the chair body (2) is provided with a massage drive part (3), and the massage drive part (3) is provided on a backrest provided in the backrest part (7). The frame (16) is provided so as to be movable in the height direction of the backrest (7) by using the frame (16) itself as a guide.
The chair-type massage machine as described.