Shoulder massage mechanism

Abstract

To provide a shoulder massage mechanism which includes means enabling fitting to the body type of a user by adjusting a lateral interval between a pair of left and right massage members.SOLUTION: A shoulder massage mechanism 13 comprises: a pair of left and right massage members 14 arranged so as to correspond to a shoulder part; and width adjustment means 15 for adjusting an interval in the left-right direction of the pair of left and right massage members 14. The width adjustment means 15 is formed to adjust an interval in the left-right direction of the massage members 14 by moving the massage members 14 in the left-right direction according to the width in the left-right direction of the shoulder part, and fixing in a prescribed position. The massage members 14 move in the left-right direction and to an obliquely lower side when an interval in the left-right direction of the pair of left and right massage members 14 is narrowed by the width adjustment means 15.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a shoulder massage mechanism including a pair of left and right massage members that hold, for example, the shoulders (including the upper arms) of a user and apply a massage action to the shoulders from the sides. [Background technology]

[0002] Conventionally, there have been chair-type massage machines capable of providing a massage action to the shoulders, etc., of a user seated on the seat. For example, the chair-type massage machine of Patent Document 1 has a shoulder massage mechanism provided with a pair of massage members (airbags) on the left and right sides at the sides of the backrest, in a position corresponding to the shoulders, etc. (see FIG. 1 of the same document). The airbags repeatedly inflate and contract, thereby pressing against the shoulders, etc., from the outside, providing a massage action. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-000416 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, a massage member (airbag) that presses against the shoulders (including the upper arms) from the outside is fixed to the side of the backrest, as disclosed in Patent Document 1, for example. However, users have a variety of body types, such as small with narrow shoulders and large with broad shoulders, and there is a risk that the massage position will not be aligned when the pair of left and right massage members are fixed to the sides of the backrest.

[0005] For example, if the user has a small body type with narrow shoulders, the pair of massage members may not come into contact with the user's shoulders. In that case, even if the airbag inflates, it cannot press the shoulders from the outside and provide a massage action. Also, if the user has a large body type with wide shoulders, the user may be pinched between the pair of massage members and feel cramped. In view of the above-mentioned problems, the present invention aims to provide a shoulder massage mechanism that is equipped with a means for adjusting the distance between a pair of left and right massage members, thereby enabling the mechanism to be adapted to the user's body type. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides the following technical solutions. The shoulder massage mechanism according to the present invention includes a pair of massage members arranged to correspond to the shoulders, and a width adjustment means for adjusting the width of the massage members in the left-right direction. Is used A pair of massage members are provided on the left and right sides of the backrest on which the user leans. side The massage member is provided with an inflatable and deflated air bag, and the width adjustment means is a side It is set up in The massage members are moved in the left-right direction in accordance with the left-right width of the shoulder and fixed at a predetermined position, thereby adjusting the interval between the massage members in the left-right direction. When the interval between the pair of massage members in the left-right direction is narrowed by the width adjustment means, the massage members move diagonally downward in the left-right direction. It is characterized by:

[0007] good Preferably, the width adjustment means has a swinging part attached to the massage member and swinging the massage member diagonally downward, a support part attached to a frame on which it is mounted and supporting the swinging part so that it can swing freely, and an engagement part that engages the swinging part with the support part, and the engagement part has an engagement convex part provided on the support part, and an engagement concave part provided on the swinging part and fitted into and engaged with the engagement convex part.

[0008] Preferably, a plurality of the engaging protrusions are provided on the support portion, and the engaging recesses are fitted into any of the engaging protrusions to adjust the distance between the pair of left and right massage members in the left-right direction. 。

[0009] Preferably, the width adjustment means is disposed at an angle with respect to the frame on which it is mounted. Effect of the Invention

[0010] According to the shoulder massage mechanism of the present invention, the distance between the pair of left and right massage members can be adjusted, so that it can be adapted to the body type of the user (for example, a user with narrow shoulders). [Brief description of the drawings]

[0011] [Figure 1] 1 is a schematic diagram showing the appearance of a chair-type massage machine equipped with a shoulder massage mechanism of the present invention; [Diagram 2] 1 is a schematic diagram showing an outline of a chair-type massage machine equipped with a shoulder massage mechanism of the present invention; [Diagram 3] 13A and 13B are diagrams illustrating a state in which the width adjustment means adjusts the left-right distance between a pair of left and right massage members. [Figure 4] 13 is a diagram showing a state when the width adjusting means moves the right massage member diagonally downward to the left (when the distance between the pair of left and right massage members is narrow). FIG. [Diagram 5] 13 is a diagram showing a state when the width adjusting means moves the right massage member in an obliquely upper right direction (when the gap between the pair of left and right massage members is wide). FIG. [Figure 6] FIG. 11 is a perspective view showing an operation state of the width adjusting means. [Figure 7] 11 is a side view showing an operation state of the width adjusting means. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of a shoulder massage mechanism 13 according to the present invention will be described with reference to the drawings. In this embodiment, the shoulder massage mechanism 13 provided in the chair type massage machine 1 will be described as an example. Note that the embodiment described below is an example of the present invention, and the configuration of the present invention is not limited to this specific example. The directions of the chair-type massage machine 1, such as front-back and left-right directions, are as shown in Fig. 1 and Fig. 2. These directions correspond to the directions seen by a user seated on the seat 2 of the chair-type massage machine 1. In addition, some of the components are omitted in the drawings to make them easier to see.

[0013] However, with regard to Figures 6 and 7, since the width adjustment means 15 is arranged at an angle on the chair-type massage machine 1, for example, in the width adjustment means 15a on the right side shown in the figure, for the sake of convenience, the upper side of the paper is regarded as the diagonally upward right direction, and the lower side of the paper is regarded as the diagonally downward left direction. As shown in Figures 1, 2, etc., the chair-type massage machine 1 has a seat portion 2 on which a user can sit, a backrest portion 3 against which the seated user leans, an armrest portion 4 on which the user's elbows can be placed, and a footrest portion 5 into which the user's lower limbs from the knees to the feet can be inserted.

[0014] Inside the backrest 3, a backrest frame 6 is provided to support the backrest 3 in a substantially upright state. The backrest frame 6 is provided with a back massage mechanism 7 that applies a massage action to the back of the user leaning against it. The back massage mechanism 7 is movable up and down within the backrest 3. For the back massage mechanism 7, it is preferable to adopt a mechanism disclosed in, for example, JP 2013-252348 A or JP 2018-134181 A. In addition, a blocking plate 8 is provided on the side of the backrest 3 to block the backrest 3 from the space to the side thereof.

[0015] A support frame 9 that supports the seat 2 from below is provided inside the seat 2. A seat massaging mechanism 10 that applies a massage action to the buttocks and thighs of a seated user is provided inside the support frame 9. The seat massaging mechanism 10 may be, for example, a mechanism disclosed in JP 2018-064807 A or the like. Below the seat portion 2 and within the support frame 9, a footrest portion 5 is stored. The footrest 5 can be freely moved outward from the support frame 9. A leg massage mechanism 11 is provided inside the footrest 5 to massage the legs of a seated user from the knees to the feet. The leg massage mechanism 11 may be, for example, a mechanism disclosed in JP 2012-143390 A.

[0016] An arm massage mechanism 12 that applies a massage to the forearm from the elbow to the hand of a seated user is provided inside the armrest 4. The arm massage mechanism 12 may be, for example, a mechanism disclosed in JP 2015-016158 A. Furthermore, the chair-type massage machine 1 of this embodiment is provided on the side of the backrest 3 with a shoulder massage mechanism 13 that applies a massage action to the shoulders (including the upper arms) of a user seated on the seat 2.

[0017] As shown in Figures 3 to 7, the shoulder massage mechanism 13 of the present invention has a pair of left and right massage members 14 arranged to correspond to the shoulders, and a width adjustment means 15 for adjusting the distance between the pair of left and right massage members 14 in the left-right direction. The massage members 14 are long members, and a pair of massage members 14 are provided on both the left and right sides of the backrest. The massage members 14 are provided so as to protrude forward from the backrest 3. The massage member 14a on the right side and the massage member 14b on the left side are provided in positions facing each other in the left-right direction. In other words, the pair of massage members 14 on the left and right sides are arranged to sandwich the shoulders. In this embodiment, the massage members 14 are housed in recesses in the shielding plate 8.

[0018] For example, an inflatable / deflatable airbag 16 is provided at the tip of the massage member 14. The airbag 16 repeatedly inflates and deflates to press against the shoulder (treatment area) from the outside. A case body 17 is provided at the base end of the massage member 14. Inside the case body 17, a width adjustment means 15 for moving the massage member 14 in the horizontal direction is provided.

[0019] Generally, if a user's shoulder width (width of the shoulders in the lateral direction) is narrow, it means that the user is short in height. In other words, the seat height of the user who sits on the seat 2 is low, so in order to fit the user's body type, the pair of left and right massage members 14 must be lowered to the position of the shoulders and the left and right interval must be adjusted. Therefore, the width adjusting means 15 of the present invention is adapted to move the pair of left and right massage members 14 obliquely downward while narrowing the gap therebetween in order to accommodate the body type of a small user.

[0020] The width adjustment means 15 is provided at the base end of the right massage member 14a and at the base end of the left massage member 14b. When narrowing the gap between the pair of left and right massage members 14, the width adjustment means 15 moves the massage members 14 in the left-right direction (toward the inside of the backrest portion 3) and swings them obliquely downward. In this embodiment, the widest space between the pair of left and right massage members 14 is defined as the normal state of the massage members 14 (width adjustment means 15). That is, the pair of left and right massage members 14 usually wait in the widest space.

[0021] Specifically, the right width adjustment means 15a moves the right massage member 14a leftward and swings it diagonally downward to the left, while the left width adjustment means 15b moves the left massage member 14b rightward and swings it diagonally downward to the right. On the other hand, when widening the gap between the pair of left and right massage members 14 (returning to the normal state), the width adjustment means 15 moves the massage members 14 in the left-right direction (outside the backrest portion 3) and swings them obliquely upward.

[0022] Specifically, the right width adjustment means 15a moves the right massage member 14a rightward and swings it diagonally upward to the right, while the left width adjustment means 15b moves the left massage member 14b leftward and swings it diagonally upward to the left. In other words, the width adjustment means 15 is configured to adjust the left-right spacing of the massage members 14 by moving the massage members 14 left-right, swinging them diagonally downward and upward, and fixing them in a predetermined position to match the shoulder width of the user.

[0023] In this embodiment, the width adjustment means 15 is a ratchet mechanism that can adjust the distance between the pair of left and right massage members 14 in a stepwise manner. Here, the device configuration will be described with a focus on the right-side width adjustment means 15a. The left-side width adjustment means 15b is arranged as a mirror image of the right-side width adjustment means 15a, and the device configuration is approximately the same. In other words, the right-side width adjustment means 15a and the left-side width adjustment means 15b are bilaterally symmetrical, so a description of the left-side width adjustment means 15b will be omitted.

[0024] 4 to 7 are enlarged views of the right-side width adjustment means 15a. First, as shown in Figures 4 and 5, the backrest frame 6 is provided with a mounting plate 18 on which the width adjustment means 15a is placed. The mounting plate 18 is provided on the backrest frame 6 in a state inclined to the right. In addition, a support member 19 for supporting the massage member 14a is provided at the base end of the massage member 14a. The support member 19 is a triangular tubular member and is disposed so that the oblique side hangs down.

[0025] The right-side width adjustment means 15a is attached to a mounting plate 18 provided on the right side of the backrest frame 6. In other words, the right-side width adjustment means 15a is disposed on the right side of the backrest frame 6 in a state inclined outward to the right. As shown in Figures 6 and 7, the width adjustment means 15a has a swinging part 20 attached to the base end of the massage member 14a and swinging the massage member 14a diagonally downward and diagonally upward, a support part 21 attached to the backrest frame 6 and supporting the swinging part 20 so that it can swing freely, and an engagement part 22 that engages the swinging part 20 with the support part 21.

[0026] The support part 21 is formed of a rectangular member that is long in the front-rear direction. A through hole 23 is formed in the upper rear part of the support part 21, the axis of which faces approximately left-right with respect to the front-rear direction. A support shaft 24 that supports the swing part 20 so that it can swing freely is inserted into this through hole 23. The support shaft 24 (through hole 23) is provided so that, when the support part 21 is attached to the mounting plate 18, the axis is parallel to the mounting plate 18 which is inclined outwardly to the right. Also, a spring 29 (e.g., a coil spring) is attached around the through hole 23 to generate a reaction force and bias the swinging part 20.

[0027] Moreover, the support portion 21 is a member divided in the substantially left-right direction, with the plate member 25 sandwiched between them. A through hole (not shown) is formed in the plate member 25, and the support shaft 24 is fitted into the through hole. The plate member 25 is a member that generates a reaction force by twisting a coil spring 29 attached around the through hole 23 (support shaft 24). In other words, the plate member 25 is a counter member that rotates in the opposite direction to the swinging portion 20 by the action (reaction force) of the coil spring 29.

[0028] A step-like engaging protrusion 31 that constitutes an engaging portion 22 (described in detail later) is formed on the upper front side of the support portion 21. The swinging part 20 is provided at the base end of the massage member 14a via a support member 19. Although not shown, the swinging part 20 is covered with a cover body and attached to the support member 19 via the cover body.

[0029] The rocking portion 20 is a tunnel-shaped member that is long in the front-rear direction and has openings on the front, rear, and bottom. That is, the rocking portion 20 is a member formed in a substantially U-shape, and is disposed so as to cover the support portion 21. When the rocking portion 20 is disposed on the right side of the backrest frame 6, the bottom opening faces diagonally downward to the left. A through hole 26 is formed in the upper rear part of the swinging part 20, with the axis facing approximately left-right with respect to the front-rear direction. The axis of this through hole 26 coincides with the axis of the through hole 23 of the support part 21. That is, the axis of the through hole 26 of the swinging part 20 coincides with the axis of the through hole 23 of the support part 21, and the support shaft 24 is rotatably inserted. The tip of a coil spring 29 attached around the through hole 23 of the support part 21 is engaged with the lower rear part of the swinging part 20.

[0030] The swinging portion 20 is provided with a spring 29 (for example, a coil spring) that applies a reaction force in a direction in which the massage members 14a open outward. When the rocking part 20 is rocked around the support shaft 24 toward the outside of the seat part 2, the rocking part 20 rotates relative to the plate member 25 of the support part 21, and the coil spring 29 engaged with the rocking part 20 is twisted and rebounds, causing the massage member 14a to return to its normal state.

[0031] Conversely, when the rocking part 20 is rocked around the support shaft 24 toward the inside of the seat part 2, the rocking part 20 rotates relative to the plate member 25 of the support part 21, and the coil spring 29 engaged with the rocking part 20 twists in the opposite direction, contracting the coil spring 29. As a result, the right massage member 14a moves diagonally downward to the left. In other words, when the oscillating portion 20 moves in the opening direction (the direction in which the massage member 14a spreads), the plate member 25 moves in the opposite direction (away from the oscillating portion 20) due to the reaction force of the coil spring 29 assembled around the support shaft 24.

[0032] Meanwhile, a through hole 27 having an axis oriented substantially in the left-right direction with respect to the front-rear direction is formed in the front upper portion of the swinging portion 20. A rotating shaft 28 that rotatably supports an engagement piece 35 (described in detail later) is fitted into this through hole 27. The rotation shaft 28 (through hole 27) is provided so that the axis of the rotation shaft 28 is parallel to the placement plate 18, which is inclined outwardly to the right, when the rotation shaft 28 is disposed on the right side of the backrest frame 6. A coil spring 30 that generates a reaction force is attached to the rotation shaft 28.

[0033] The engaging portion 22 has an engaging protrusion 31 provided on the support portion 21 and an engaging recess 32 provided on the swinging portion 20 that fits into and engages with the engaging protrusion 31 . A plurality of engaging protrusions 31 are provided on the upper front side of the support portion 21, and the engaging recesses 32 fit into one of the engaging protrusions 31 to adjust the left-right spacing between the pair of left and right massage members 14.

[0034] 7, the engaging protrusion 31 is a generally L-shaped member that protrudes forward. The engaging protrusion 31 is provided with a first engaging surface 33 and a second engaging surface . The first engagement surface 33 is a surface that faces diagonally downward and rearward to the left. The first engagement surface 33 is in surface contact with a first engagement surface 37 provided in the engagement recess 32.

[0035] The second engagement surface 34 faces in a direction (diagonally upward to the right and rearward) substantially perpendicular to the direction in which the first engagement surface 33 faces. The second engagement surface 34 comes into surface contact with a second engagement surface 38 provided in the engagement recess 32. In this embodiment, the engaging protrusion 31 is a stepped groove having three continuous peaks. In other words, the engaging protrusion 31 is a member having three eaves-shaped protrusions formed thereon in a side view.

[0036] The engagement piece 35 is a member formed in a flap shape, and is attached to the front side of the swinging part 20. On the rear side of this engagement piece 35, an engagement recess 32 that engages with the engagement protrusion 31 is formed. 7, the engagement recess 32 is generally L-shaped and has a surface recessed in the rear direction like a valley. The engagement recess 32 is provided with a first engagement surface 37 and a second engagement surface 38.

[0037] The first engagement surface 37 faces diagonally downward and rearward to the left. The first engagement surface 37 comes into surface contact with the first engagement surface 33 provided on the engagement protrusion 31. The second engagement surface 38 faces in a direction (diagonally upward to the right and rearward) substantially perpendicular to the direction in which the first engagement surface 37 faces. The second engagement surface 38 comes into surface contact with the second engagement surface 34 provided on the engagement protrusion 31.

[0038] That is, the valley-shaped engaging recess 32 is in surface contact with and fits into the mountain-shaped engaging protrusion 31 formed on the support part 21 without any gaps. The valley-shaped engaging recess 32 and the mountain-shaped engaging protrusion 31 have approximately the same area. On the other hand, a through hole 36 is formed on the front side of the engagement piece 35, with the axis facing approximately left-right with respect to the front-rear direction. The axis of this through hole 36 coincides with the axis of the through hole 27 formed on the front side of the swinging part 20. That is, the axis of the through hole 36 of the engagement piece 35 coincides with the axis of the through hole 27 of the swinging part 20, and the rotating shaft 28 is rotatably inserted therein. This engagement piece 35 is adapted to rotate around the rotating shaft 28.

[0039] Further, a spring 30 (for example, a coil spring) is provided around the rotation axis 28 of the engagement piece 35, which applies a reaction force to the engagement protrusion 31 when the engagement protrusion 31 and the engagement recess 32 are engaged with each other. In other words, when the engaging protrusion 31 and the engaging recess 32 are engaged with each other, the reaction force of the coil spring 29 provided on the rear side of the oscillating part 20 is applied to the first engaging surfaces 33, 37 which are in surface contact with each other, so that a force is applied in a vertical direction (the direction in which the massage member 14a opens outward) to the first engaging surfaces 33, 37, and the engaging piece 35 is pressed against the support part 21 and fixed.

[0040] At the same time, the reaction force of the coil spring 30 provided on the front side of the oscillating part 20 is applied to the second engagement surfaces 34, 38, which are in surface contact with each other, so that a force is applied vertically (towards the support part 21) to the second engagement surfaces 34, 38, and the engagement piece 35 is pressed against the support part 21 and fixed. In other words, between the engaged engagement protrusion 31 and engagement recess 32, two forces are applied: a pressing force applied to the first engagement surfaces 33, 37 which are in surface contact with each other, and a pressing force applied to the second engagement surfaces 34, 38 which are in surface contact with each other, so that the engagement piece 35 is pressed against the support portion 21 and securely fixed.

[0041] As described above, in this embodiment, the width adjustment means 15a is capable of adjusting the left-right distance between a pair of massage members 14 in three stages by fixing the oscillating part 20 by engaging the engagement recess 32 of the engagement piece 35 with any of the engagement protrusions 31 provided on the support part 21. That is, the width adjustment means 15 is a ratchet mechanism that can adjust the distance between the pair of left and right massage members 14 in stages (in this embodiment, it can be adjusted in three stages).

[0042] In this way, the shoulder massage mechanism 13 of the present invention can adjust the left-right distance between the pair of massage members 14 by using the width adjustment means 15 to move the pair of massage members 14 diagonally downward, thereby accommodating various body types of users. [Operation mode] Next, the operation of the shoulder massage mechanism 13 of the present invention will be described with reference to the drawings.

[0043] As shown in Figs. 3 to 7, the left and right distance between the pair of massage members 14 is narrowed from the widest distance (the widest distance). The pair of left and right massage members 14 are fixed on the outermost sides (diagonally upward). For example, the right massage member 14a is fixed on the outermost right side (diagonally upward to the right). For the right width adjustment means 15a, the engaging recess 32 of the engaging piece 35 is engaged with the rightmost outer engaging protrusion 31 provided on the support part 21 (see the upper diagram in FIG. 7). That is, the swinging part 20 is in the most open state (raised diagonally upward to the right) relative to the support part 21. The left massage member 14b is in a mirror image state of the right massage member 14a.

[0044] Here, the pair of left and right massage members 14 are moved most inward (diagonally downward). That is, the distance between the pair of left and right massage members 14 is narrowed to the smallest. For example, when the right massage member 14a is moved to the innermost left side (diagonally downward to the left), the engagement piece 35 of the right width adjustment means 15a rotates forward, disengaging the engagement recess 32 from the engagement protrusion 31.

[0045] Then, the right width adjustment means 15a moves the right massage member 14a leftward and swings it diagonally downward to the left. Then, the engagement piece 35 rotates rearward, so that the engagement recess 32 engages with the leftmost inner (diagonally downward to the left) engagement protrusion 31 provided on the support part 21 (see the lower diagram in FIG. 7). Between the engaged engaging protrusion 31 and engaging recess 32, a pressing force is applied to the first engaging surfaces 33, 37 which are in surface contact with each other, and a pressing force is applied to the second engaging surfaces 34, 38 which are in surface contact with each other, so that the engaging piece 35 is pressed against the support part 21, and the swinging part 20 is securely fixed. The right massage member 14a approaches, for example, the right shoulder of a small user.

[0046] On the other hand, the left width adjustment means 15b moves the left massage member 14b to the right and swings it diagonally downward to the right. This left width adjustment means 15b performs a mirror image of the right width adjustment means 15a. For example, the left massage member 14b approaches the left shoulder of a small user. In order to widen the gap between the pair of left and right massage members 14 from the narrowest gap (closest gap), the above-described procedure may be reversed.

[0047] That is, when widening the gap between the pair of right and left massage members 14 (returning to the normal state), for example, the right width adjustment means 15a moves the right massage member 14a to the right while swinging it diagonally upward to the right. The engagement recess 32 of the engagement piece 35 is engaged with the rightmost outer engagement protrusion 31 provided on the support part 21. The right massage member 14a approaches, for example, the right shoulder of a large user. The left width adjustment means 15b moves the left massage member 14b to the left while swinging it diagonally upward to the left and fixes it. The left massage member 14b approaches, for example, the left shoulder of a large user.

[0048] As described above, according to the shoulder massage mechanism 13 of the present invention, the pair of left and right massage members 14 can be moved diagonally downward by the width adjustment means 15 to adjust the left and right distance, thereby making it possible to match the body type (shoulder width, etc.) of the user. In other words, even a small user with narrow shoulders can use the shoulder massage mechanism 13. It should be noted that the embodiments disclosed herein should be considered as illustrative in all respects and not restrictive.

[0049] In particular, in the embodiments disclosed herein, matters that are not explicitly stated, such as operating conditions, operating conditions, dimensions and weights of components, etc., do not deviate from the scope of what a person of ordinary skill in the art would normally do, and instead are matters that a person of ordinary skill in the art would easily imagine. The shoulder massage mechanism 13 of the present invention can be configured as long as it is a massage mechanism having a configuration in which the part of the user to be treated is sandwiched between a pair of left and right massage members 14. For example, a seat massage mechanism 10 having a configuration in which the lower limbs such as the thighs and waist (buttocks) of the user are sandwiched between the massage members 14 can be used. In this case, the distance between the pair of left and right massage members 14 can be adjusted by the width adjustment means 15 to match the thickness of the thighs.

[0050] Further, the device configurations of the back massage mechanism 7, the seat massage mechanism 10, the leg massage mechanism 11, the arm massage mechanism 12, etc. can employ various mechanisms and are not particularly limited. [Explanation of symbols]

[0051] 1. Chair massage machine 2 Seat part 3 Backrest 4 Armrest 5 Footrest section 6 Backrest frame 7 Back massage mechanism 8. Barrier 9 Support Frame 10 Seat massage mechanism 11 Lower limb massage mechanism 12 Arm massage mechanism 13 Shoulder massage mechanism 14 Massage parts 14a Massage member (right side) 14b Massage member (left side) 15 Width adjustment means 15a Width adjustment means (right side) 15b Width adjustment means (left side) 16 Airbag 17 Case body 18 Loading plate 19 Support member 20 Swinging part 21 Support part 22 Engagement part 23 Through hole (support part) 24 Support shaft 25 Plate members 26 Through hole (swing part, rear side) 27 Through hole (swing part, front side) 28 Rotational Axis 29 Spring (swing part, rear side) 30 Spring (swing part, front side) 31 Engagement protrusion 32 Engagement recess 33 First engaging surface (engaging protrusion) 34 Second engagement surface (engagement protrusion) 35 Engagement piece 36 Through hole 37 First engagement surface (engagement recess) 38 Second engagement surface (engagement recess)

Claims

1. a pair of left and right massage members disposed to correspond to the shoulders, and a width adjustment means for adjusting the distance between the pair of left and right massage members in the left-right direction, The massage members are provided in pairs on both the left and right sides of the backrest on which the user leans, and an inflatable and deflated airbag is provided on the tip side of each massage member. the width adjustment means is provided on the base end side of the massage members, and is configured to adjust the interval between the massage members in the left-right direction by moving the massage members in the left-right direction in accordance with the left-right width of the shoulder and fixing them at a predetermined position; When the width adjustment means narrows the left-right distance between the pair of massage members, the massage members move obliquely downward in the left-right direction. A shoulder massage mechanism.

2. The width adjustment means is a swinging part attached to the massage member and swinging the massage member obliquely downward; A support portion attached to a frame on which the device is mounted and supporting the swing portion so as to be swingable; an engaging portion that engages the swinging portion with the support portion, The engaging portion has an engaging protrusion provided on the support portion and an engaging recess provided on the swinging portion and fitted into the engaging protrusion.

2. The shoulder massage mechanism according to claim 1.

3. The engaging protrusion is provided in a plurality of parts on the support portion, The engaging recess is fitted into one of the engaging protrusions, thereby adjusting the distance between the pair of massage members in the left and right direction.

3. The shoulder massage mechanism according to claim 2.

4. A shoulder massage mechanism as described in any one of claims 2 to 3, characterized in that the width adjustment means is arranged at an angle with respect to the frame on which it is mounted.

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