Massage device

Abstract

To improve massage power while enabling treatment over a wide area. [Solution] The massage device comprises a backrest, a treatment drive unit 2, a seat frame, and a backrest drive unit 8. The front end of the back frame of the backrest is positioned below the user's thighs. The treatment drive unit 2 is movable along the back frame to provide treatment to the user's shoulders and buttocks. The backrest drive unit 8 has a base 80 and a movable unit 81. The lower end of the base 80 is attached to a connecting part at the lower end of the seat frame. The movable unit 81 is attached to a connecting part at the front end of the back frame and is slidable in the length direction of the base 80. The movable unit 81 tilts the backrest as it slides. When the backrest is in the most rearwardly tilted position, the backrest drive unit 8 is positioned so as not to interfere with the treatment drive unit 2, even when the treatment drive unit 2 is positioned most forward relative to the back frame.

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates generally to massage devices, and more particularly to massage devices that include a seat portion and a back portion. [Background technology]

[0002] Patent Document 1 discloses a chair-type massage machine. This chair-type massage machine includes a seat, a backrest, and a single long guide rail that guides the treatment head from the backrest to the seat. The lower part of the long guide rail, which extends further downward than the lower end of the backrest, is located on the backside of the seat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-225160 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in a chair-type massage machine (massage device) such as that disclosed in Patent Document 1, it is desired to improve the massage power while being able to treat a wide range, for example, from a person's neck to their thighs.

[0005] The present disclosure has been made in view of the above-mentioned circumstances, and aims to provide a massage device that can treat a wide range and improve massage power. [Means for solving the problem]

[0006] A massage device according to one aspect of the present disclosure includes a backrest, a treatment drive unit, a seat frame, and a backrest drive unit. The backrest has an arc-shaped back frame that is bent downwardly and convexly. The front end of the back frame is located below the thighs of a user seated on the massage device. The treatment drive unit is disposed on the back frame in a manner that allows it to move along the length of the back frame, and provides treatment to multiple areas of the user, including the shoulders and buttocks. The seat frame supports the backrest relative to an installation surface on which the massage device is installed. The backrest drive unit has a base and a movable unit. The lower end of the base is attached to a connecting portion extending in the left-right direction of the lower end of the seat frame below the thighs of the user seated on the massage device. The movable portion is attached to a connecting portion extending in the left-right direction of the front end of the back frame and is slidable in the length direction of the base. The movable portion tilts the backrest as the movable portion slides. When the backrest is in the most rearwardly tilted position, even if the treatment drive unit is positioned most forward with respect to the back frame, the backrest drive unit is positioned so as not to interfere with the treatment drive unit. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to improve the massage force while enabling treatment over a wide area. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing the appearance of a massage device according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing the appearance of the massage device with the outer cover removed. [Figure 3] FIG. 3 is a perspective view showing a seat frame and a back frame of the massage device. [Figure 4] FIG. 4 is a side view showing one state of the guide rails provided in the massage device. [Figure 5]FIG. 5 is a side view showing another state of the guide rails provided in the massage device. [Figure 6] FIG. 6 is a side view showing still another state of the guide rails provided in the massage device. [Figure 7] FIG. 7 is a side view showing one state of the treatment drive unit provided in the massage device. [Figure 8] FIG. 8 is a side view showing another state of the treatment drive unit provided in the massage device. [Figure 9] FIG. 9 is a side view showing a guide rail and a backboard provided in the massage device. [Figure 10] FIG. 10 is a perspective view showing a seat portion of the massage device. [Figure 11] FIG. 11 is a plan view showing a seat portion of the massage device. [Figure 12] FIG. 12 is a cross-sectional view taken along line AA in FIG. [Figure 13] FIG. 13 is a schematic diagram for explaining a second seat and a third seat provided in the massage device. [Figure 14] FIG. 14 is a schematic view showing a fixed component included in the massage device. [Figure 15] FIG. 15 is a perspective view showing an attachment portion provided on the massage device. [Figure 16] FIG. 16 is a perspective view showing a rear cover portion of the massage device. [Figure 17] FIG. 17 is a schematic diagram for explaining the operation of the armrest portion of the massage device. [Figure 18] FIG. 18 is another schematic view for explaining the operation of the armrest portion of the massage device. [Figure 19] FIG. 19 is a schematic diagram for explaining how to attach the armrests of the massage device. [Figure 20] FIG. 20 is a schematic diagram for explaining how to attach the armrests of the massage device. [Figure 21] FIG. 21 is a schematic view showing one state of the massage device. [Figure 22] FIG. 22 is a schematic view showing another state of the massage device. [Figure 23] FIG. 23 is a schematic diagram showing the configuration of the massage device. [Figure 24] FIG. 24 is a schematic diagram showing a display screen displayed by the massage device. [Figure 25] FIG. 25 is another schematic diagram showing a display screen displayed by the massage device. [Figure 26] FIG. 26 is an explanatory diagram of a current path when the pump drive circuit included in the massage device is in a first switching state. [Figure 27] FIG. 27 is an explanatory diagram of a current path when the pump drive circuit included in the massage device is in the second switching state. [Figure 28] FIG. 28 is an explanatory diagram of the driving voltage of the pump provided in the massage device. [Figure 29] FIG. 29 is a flowchart showing the operation of the massage device. [Figure 30] FIG. 30 is a schematic diagram showing the shape of a first sheet included in a massage device according to a modified example. [Figure 31] FIG. 31 is a schematic diagram showing the shape of a first sheet included in a massage device according to another modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. Common elements in the embodiments described below are designated by the same reference numerals, and redundant descriptions of the common elements may be omitted. The following embodiments and modifications are merely a portion of various embodiments of the present disclosure. Various modifications of the following embodiments and modifications may be made depending on the design, etc., as long as the object of the present disclosure can be achieved. The configurations of the embodiments and modifications may also be combined as appropriate.

[0010] The drawings described in this disclosure are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios. Note that the arrows indicating the directions in the drawings are merely examples and are not intended to define the directions when using the massage device 1. Also, the arrows indicating the directions in the drawings are merely shown for the purpose of explanation and do not have any substance.

[0011] (Embodiment) (1) Overview First, an overview of a massage device 1 according to this embodiment will be described with reference to FIGS.

[0012] The massage device 1 performs a treatment (or procedure) on the body of a person (user) who uses the massage device 1. In this embodiment, "treatment" means performing a massage such as kneading, tapping, pushing, rubbing, or stroking on the person's body.

[0013] As shown in FIGS. 1 and 2, the massage device 1 includes a seat portion 12, a backrest portion 11, and a treatment drive unit 2 (see FIG. 2). The seat portion 12 has a seat portion 4 (see FIG. 9) on which a person using the massage device 1 sits. In this embodiment, a state in which a person is seated on the seat portion 4 is assumed to be a state in which the person's buttocks are placed on the seat portion 4 and the person's back is facing the backrest portion 11. In addition, in this embodiment, it is assumed that the user sits on the seat portion 4 while leaning against the backrest portion 11 when using the massage device 1. Here, the state in which a person is seated on the seat portion 4 includes a state in which the person is seated on the seat portion 4 via, for example, an outer skin covering the seat portion 4. In other words, the state in which a person is seated on the seat portion 4 includes a state in which the person's buttocks are placed on the seat portion 4 via the outer skin. The outer skin may include a cushioning material, a cover covering the cushioning material, or the like.

[0014] The backrest 11 can be tilted relative to the seat 12. In other words, the massage device 1 is a massage chair in which the backrest 11 can be tilted (reclined) relative to the seat 12. In this embodiment, the backrest 11 can be tilted between a first position and a second position. The second position is a position in which the backrest 11 is tilted further back than the first position.

[0015] As shown in FIGS. 3 to 5, the backrest 11 has a guide rail 20. The treatment drive unit 2 is disposed on the guide rail 20 so as to be movable relative to the guide rail 20.

[0016] A portion of the guide rail 20 is located below the seat portion 4. The guide rail 20 has a first end 201 and a second end 202 (see FIG. 4 or FIG. 5). The first end 201 is the end of the guide rail 20 on the seat portion 12 side in the longitudinal direction. The second end 202 is the end of the guide rail 20 on the opposite side from the first end 201 in the longitudinal direction.

[0017] The treatment drive unit 2 is disposed on the guide rail 20 in a state where it can move relative to the guide rail 20 of the backrest portion 11. The treatment drive unit 2 has a first treatment element 21A and a second treatment element 21B.

[0018] In the longitudinal direction of the guide rail 20, the first treatment element 21A is disposed closer to the first end 201 than the second treatment element 21B. When the first treatment element 21A is located below the seat 4 and the backrest 11 is in the first position, the second treatment element 21B is located higher than the first treatment element 21A. When the first treatment element 21A is located below the seat 4 and the backrest 11 is in the second position, the first treatment element 21A is located higher than the second treatment element 21B.

[0019] The treatment drive unit 2 of this embodiment has a first treatment element 21A and a second treatment element 21B that are located at different positions in the longitudinal direction of the guide rail 20. This makes it possible to widen the treatment range (or massage range) along the longitudinal direction of the guide rail 20. Furthermore, since the first treatment element 21A and the second treatment element 21B can widen the treatment range along the longitudinal direction of the guide rail 20, it is possible to prevent the guide rail 20 from becoming long, and the massage device 1 can be made more compact.

[0020] By the way, increasing the number of treatment heads has the advantage of widening the treatment area, but there is a concern that the pressure will be dispersed and the massage force will decrease.

[0021] Here, the first treatment element 21A and the second treatment element 21B in this embodiment are displaced according to the degree of inclination (reclining degree) of the backrest 11 (or the guide rail 20). In particular, when the first treatment element 21A is positioned below the seat 4, the positions of the first treatment element 21A and the second treatment element 21B can be displaced in the up-down direction according to the degree of inclination of the backrest 11. This makes it possible to change the degree of contact of the first treatment element 21A and the second treatment element 21B with the human body, thereby improving the massage power.

[0022] (2)Details Hereinafter, the detailed configuration of the massage device 1 according to this embodiment will be described with reference to FIGS.

[0023] In the following description, up, down, left, right, front and rear (up, down, left, right, front and rear in FIG. 4) when the massage device 1 is installed on a horizontal installation surface are referred to as up, down, left, right, front and rear. The up, down, left, right, and front and rear directions are perpendicular to each other. In this embodiment, the up, down direction is referred to as the first direction D1 (see FIG. 4), the left and right direction is referred to as the second direction D2 (see FIG. 11), and the front and rear direction is referred to as the third direction D3 (see FIG. 4). Note that the installation direction of the massage device 1 is not limited to the above directions. Furthermore, in this embodiment, the length direction of the guide rails 20 provided in the massage device 1 is referred to as the fourth direction D4, and the protruding direction, which is a direction perpendicular to the length direction of the guide rails 20, is referred to as the fifth direction D5.

[0024] In this disclosure, "orthogonal (perpendicular)" refers not only to a state where the angle between two things is exactly 90 degrees, but also to a state where two things intersect within a certain range of difference. In other words, the angle between two orthogonal things is within a certain range of difference from 90 degrees (for example, 10 degrees or less). In other words, "orthogonal" in this disclosure includes a case where the angle between two things is between 80 degrees and 100 degrees. Similarly, "parallel" in this disclosure includes not only a case where two things do not strictly intersect, but also a case where two things are lined up within a certain range of difference. For example, "parallel" in this disclosure includes a case where one thing is inclined at an angle of 10 degrees or less relative to the other. In other words, "parallel" in this disclosure includes a case where the angle between one thing and the other is between -10 degrees and 10 degrees.

[0025] (2.1) Configuration of the massage device The massage device 1 of this embodiment includes a treatment unit that treats multiple parts of the human body, including a first part and a second part. As shown in Figs. 1 and 2, the massage device 1 includes a seat part 12, a backrest part 11, an ottoman 15, and a treatment drive part 2 (see Fig. 2). The seat part 12 has a seat part 4 (see Fig. 10) on which a person using the massage device 1 sits. The massage device 1 of this embodiment is a massage chair in which the backrest part 11 tilts (reclines) relative to the seat part 12.

[0026] The massage device 1 further includes a pair of left and right thigh treatment sections 14, a pair of left and right armrest sections 16, a pair of left and right side cover sections 18, a foot cover section 19, a back cover section 17 (see FIG. 19), and a fixing part X1 (see FIG. 3). In the following description, each of the pair of left and right thigh treatment sections 14 may be simply referred to as the "thigh treatment section 14." Also, each of the pair of left and right armrest sections 16 may be simply referred to as the "armrest section 16." Also, each of the pair of left and right side cover sections 18 may be simply referred to as the "side cover section 18."

[0027] 23, the massage device 1 further includes a power supply unit 100, an operation unit 13, a first airbag 51, a second airbag 52, a third airbag 53, a fourth airbag 54, a fifth airbag 55, a sixth airbag 56, a seventh airbag 57, an eighth airbag 58, a ninth airbag 59, an airbag drive unit 7, a backrest drive unit 8, an ottoman drive unit 150, a memory unit 62, and a control unit 61. In this embodiment, the first airbag 51 to the seventh airbag 57 are each a pair of left and right airbags, but the pair of first airbags 51 to the pair of seventh airbags 57 may be simply referred to as the "first airbag 51," the "second airbag 52," the "third airbag 53," the "fourth airbag 54," the "fifth airbag 55," the "sixth airbag 56," and the "seventh airbag 57." Furthermore, the eighth airbag 58 and the ninth airbag 59 are a pair of left and right airbags corresponding to the right and left legs of the user, respectively (i.e., a total of four airbags), but the four eighth airbags 58 and the four ninth airbags 59 may each be simply referred to as the "eighth airbag 58" and the "ninth airbag 59." Furthermore, the (pair of) first airbag 51 to (pair of) seventh airbag 57, the four eighth airbags 58, and the four ninth airbags 59 may each be simply referred to as the "airbag 50."

[0028] (2.2) Backrest configuration 1, the backrest portion 11 is a portion that faces the back of a user when the user uses the massage device 1. When using the massage device 1, the user sits on the seat portion 4 while leaning against the backrest portion 11.

[0029] The backrest 11 is tiltable relative to the seat 12. The backrest 11 (or the guide rail 20) is tiltable between a first tilting position (first position) and a second tilting position (second position). The second tilting position is a position where the backrest 11 is tilted further back than the first tilting position. In this embodiment, the first tilting position is the default position (chair position) of the backrest 11, and the second tilting position is the maximum tilted position (full reclining position). In this embodiment, a third tilting position (third position) between the first and second tilting positions is the massage position, which is the base position when the massage device 1 performs treatment on the human body. In this embodiment, "tilting back" means that the backrest 11 is tilted from the first tilting position toward the second tilting position. Furthermore, "leaning forward" means that the backrest 11 is tilted from the second tilting position toward the first tilting position. In other words, the first tilting position is the position where the backrest 11 (or the guide rail 20) is tilted most forward, and the second tilting position is the position where the backrest 11 (or the guide rail 20) is tilted most backward.

[0030] As shown in FIGS. 2 and 3, the backrest 11 has a back frame 200 (see FIG. 3), a backboard 111 (see FIG. 2), and a pair of left and right shoulder wall portions 112 (see FIG. 2).

[0031] The back frame 200 has a frame-like shape. The back frame 200 has an arc-like shape when viewed from the left and right in a plan view. More specifically, the back frame 200 has an arc-like shape that is bent downwardly and convex when viewed from the left and right in a plan view. The back frame 200 has a guide rail 20, a first connecting portion 204, a second connecting portion 205, an attachment portion 26, and a pair of connecting plates 27.

[0032] First connecting portion 204 connects a first end 201 of first rail 20A (described later) to a first end 201 of second rail 20B (described later). First connecting portion 204 extends in the left-right direction. Second connecting portion 205 connects a second end 202 of first rail 20A (described later) to a second end 202 of second rail 20B (described later). Second connecting portion 205 extends in the left-right direction.

[0033] The mounting portion 26 is fixed to the first connecting portion 204. The mounting portion 26 has a base plate 261, a pair of mounting plates 262, and a support plate 264 (see FIG. 15).

[0034] The substrate 261 has a plate-like shape. The normal direction of the main surface of the substrate 261 is along the length direction (fourth direction D4) of the guide rail 20. The substrate 261 is attached to the front end of the first connecting portion 204 so that the main surface of the substrate 261 faces the front end of the first connecting portion 204 in the front-rear direction.

[0035] The pair of mounting plates 262 are shaped like plates. The normal direction of the main surface of the mounting plate 262 is along the left-right direction (second direction D2). The pair of mounting plates 262 face each other in the left-right direction. The pair of mounting plates 262 are spaced apart and parallel. The pair of mounting plates 262 protrude forward from both ends of the base plate 261 in the left-right direction. The backrest drive unit 8 (see FIG. 4) is attached to the pair of mounting plates 262.

[0036] The support plate 264 has a plate-like shape. The normal direction of the main surface of the support plate 264 is along the protruding direction (fifth direction D5). The support plate 264 protrudes rearward from the lower end of the substrate 261.

[0037] The pair of connecting plates 27 are arranged side by side so as to face each other in the left-right direction. One of the pair of connecting plates 27 is fixed to the first rail 20A, and the other of the pair of connecting plates 27 is fixed to the second rail 20B. The pair of connecting plates 27 are connected to the pair of rear legs 304 of the seat frame 3 of the seat 12 in a state where they can rotate around the rotation axis Ax2.

[0038] The treatment drive unit 2 is disposed on the guide rail 20 so as to be movable relative to the guide rail 20. As shown in FIG. 11 , the guide rail 20 has a first rail 20A and a second rail 20B that face each other in the left-right direction (second direction D2). The first rail 20A and the second rail 20B are spaced apart and parallel to each other. In a plan view from the top-bottom direction, the length direction of the first rail 20A and the length direction of the second rail 20B are aligned with the front-rear direction (third direction D3). That is, in a plan view from the top-bottom direction, the length direction of the guide rail 20 is aligned with the front-rear direction. The length directions of the first rail 20A, the second rail 20B, and the guide rail 20 are parallel to each other. In this embodiment, the length directions of the first rail 20A, the second rail 20B, and the guide rail 20 are defined as a fourth direction D4.

[0039] A first end (one end) in the left-right direction of the treatment drive unit 2 is attached to the first rail 20A. A second end (the other end) in the left-right direction of the treatment drive unit 2 is attached to the second rail 20B. In other words, the treatment drive unit 2 is disposed between the first rail 20A and the second rail 20B.

[0040] As shown in FIG. 3 , the guide rail 20 is connected to the seat frame 3 of the seat 12 via a pair of connecting plates 27. The guide rail 20 is arranged so as to be tiltable relative to the seat frame 3 of the seat 12. In this embodiment, the guide rail 20 is tiltable relative to the seat frame 3 of the seat 12 around the rotation axis Ax2. When the guide rail 20 tilts relative to the seat frame 3 of the seat 12, the backrest 11 tilts relative to the seat 12.

[0041] The rotation axis Ax2 is an axis along the second direction D2. The rotation axis Ax2 is located at the rear end of the seat frame 3 of the seat 12, and is located rearward of the main portion of the seat 4 (see FIG. 11).

[0042] 4 to 6 show how the guide rail 20 tilts relative to the seat frame 3 of the seat 12. More specifically, Fig. 4 shows the guide rail 20 in the first tilted position (chair position), Fig. 5 shows the guide rail 20 in the third position (massage position), and Fig. 6 shows the guide rail 20 in the second position (fully reclined position).

[0043] The first rail 20A has a first end 201, which is the end of the first rail 20A on the seat 12 side (or the seat frame 3 side) in the longitudinal direction (fourth direction D4) of the first rail 20A, and a second end 202 (see FIG. 5 or 6), which is the end on the opposite side in the fourth direction D4. Although the second rail 20B is hidden by the first rail 20A and is not shown in FIGS. 4 to 6, the second rail 20B also has a first end 201 and a second end 202, similar to the first rail 20A. The first end 201 is located lower than the second end 202. The first end 201 of the first rail 20A and the first end 201 of the second rail 20B are the first ends 201 of the guide rails 20, and the second end 202 of the first rail 20A and the second end 202 of the second rail 20B are the second ends 202 of the guide rails 20. In other words, the guide rail 20 has a first end 201, which is the end of the guide rail 20 on the seat portion 12 side in the longitudinal direction, and a second end 202, which is the end of the guide rail 20 opposite the first end 201 in the longitudinal direction.

[0044] Each of the first rail 20A and the second rail 20B further includes a rack 203 (see FIG. 3). The rack 203, together with a pinion gear of a movement mechanism of the treatment drive unit 2 (described later), constitutes at least a part of a rack-and-pinion mechanism.

[0045] In this embodiment, the shape of the first rail 20A and the shape of the second rail 20B are aligned along the up-down direction when viewed in a plan view from the front-rear direction. Furthermore, the shape of the first rail 20A and the shape of the second rail 20B are arc-shaped when viewed in a plan view from the left-right direction. That is, the shape of the guide rail 20 in this embodiment is arc-shaped when viewed in a plan view from the left-right direction. More specifically, the shape of the guide rail 20 is arc-shaped, bent downwardly and convexly, when viewed in a plan view from the left-right direction.

[0046] As shown in FIGS. 4 to 6, a portion of the guide rail 20 in this embodiment is located below the seat 4 (see FIG. 10). The more the backrest 11 (or the guide rail 20) tilts backward, the more the first end 201 of the guide rail 20 displaces upward. Therefore, for example, when the first treatment element 21A is located below the seat 4, in other words, when the first treatment element 21A is located forward of the rotation axis Ax2, the more the guide rail 20 tilts backward, the more the first treatment element 21A displaces upward. This makes it possible to improve the massage force on the person's buttocks or thighs when the backrest 11 is tilted backward.

[0047] 2, the backboard 111 is disposed in front of the guide rail 20 (i.e., in front of a portion of the back frame 200) so as to cover the guide rail 20. The backboard 111 comes into contact with the back of the user via an outer skin or the like.

[0048] As shown in FIG. 9, the backboard 111 has a rear surface 1111. In a plan view from the left-right direction, the backboard 111 and the guide rail 20 are non-parallel. More specifically, the closer to the first end 201 (front end or bottom end) of the guide rail 20 from the second end 202 (rear end or top end), the larger the gap (or distance) between the guide rail 20 and the backboard 111 in the protruding direction (fifth direction D5) perpendicular to the length direction (fourth direction D4) of the guide rail 20. In other words, the closer to the seat 12, the larger the gap (or distance) between the guide rail 20 and the backboard 111 in the fifth direction D5.

[0049] 9 is the distance between the guide rail 20 and the rear surface 1111 of the backboard 111 at a first measurement position in the longitudinal direction of the guide rail 20. The distance SP2 is the distance between the guide rail 20 and the rear surface 1111 of the backboard 111 at a second measurement position in the longitudinal direction of the guide rail 20. The second measurement position is a measurement position closer to the first end 201 than the first measurement position. The distance SP2 at the second measurement position is larger than the distance SP1 at the first measurement position.

[0050] According to the massage device 1 of this embodiment, when the treatment drive unit 2 moves from a position (first treatment position) corresponding to the shoulder (e.g., a first position) to a position (second treatment position) corresponding to the buttocks (e.g., a second position), the closer the treatment drive unit 2 gets to the second treatment position, the farther the treatment drive unit 2 moves from the backboard 111. This reduces the possibility that the treatment elements 21 will hit a position (e.g., a third position) such as the lower back, causing discomfort such as pain to the user.

[0051] As shown in FIG. 2, a pair of left and right shoulder wall portions 112 protrude forward from both ends of the backboard 111 in the left-right direction. The shoulder wall portions 112 are formed from the upper ends of the ends of the backboard 111 in the left-right direction to predetermined positions. The shoulder wall portions 112 are provided in positions that hide the face and shoulders of the user when viewed from the left-right direction. The shoulder wall portions 112 are shaped like a plate. The pair of left and right shoulder wall portions 112 face each other in the left-right direction.

[0052] (2.3) Backrest drive unit configuration The backrest drive unit 8 tilts the backrest 11 based on the control of the control unit 61. As shown in FIGS. 4 to 6, the backrest drive unit 8 is connected to the back frame 200 of the backrest 11 and the seat frame 3 of the seat 12 in a state in which it can rotate relative to both the back frame 200 of the backrest 11 and the seat frame 3 of the seat 12.

[0053] The backrest drive unit 8 has a base unit 80 and a movable unit 81 .

[0054] The base 80 has a rectangular pillar shape. However, the base 80 may have a cylindrical shape. The end portions 801 (lower end portions) in the longitudinal direction of the base 80 are attached to the pair of mounting plates 307 of the seat frame 3 in a state where they can rotate relative to the pair of mounting plates 307.

[0055] The movable part 81 is attached to the base part 80 in a state where it can move along the longitudinal direction of the base part 80. The attachment parts 811 of the movable part 81 are attached to a pair of attachment plates 262 of the attachment part 26 in a state where the movable part 81 can rotate with respect to the attachment part 26 of the back frame 200.

[0056] Here, the base 80 has a motor (not shown) for sliding the movable part 81 along the base 80. The motor operates under the control of the control unit 61. As the movable part 81 connected to the mounting parts 26 of the back frame 200 slides, the base 80 rotates relative to the pair of mounting plates 307. As the movable part 81 slides, the movable part 81 rotates relative to the pair of mounting plates 262. In other words, as the movable part 81 slides, the backrest 11 tilts relative to the seat 12.

[0057] The base 80 of this embodiment has a first limiter and a second limiter (not shown). The first limiter is provided near the upper end of the movable range of the movable part 81, and the second limiter is provided near the lower end of the movable range of the movable part 81. When the first limiter detects the movable part 81, the movable part 81 does not move any further toward the upper end of the base 80, regardless of control by the control unit 61. Furthermore, when the second limiter detects the movable part 81, the movable part 81 does not move any further toward the lower end of the base 80, regardless of control by the control unit 61.

[0058] As shown in FIGS. 4 to 6, the backrest drive unit 8 tilts the backrest 11 relative to the seat 12 by rotating relative to the seat frame 3 and sliding the movable unit 81 relative to the base 80. In the massage device 1 of this embodiment, the first end 201 of the guide rail 20 is located below the seat 4 (see FIG. 10), and the treatment drive unit 2 can move up to below the seat 4, so the configuration that can be placed in the space below the seat 4 is limited. Here, the backrest drive unit 8 of this embodiment tilts the backrest 11 by sliding the movable unit 81 relative to the base 80. As a result, the backrest drive unit 8 of this embodiment occupies a smaller space than a backrest drive unit that tilts the backrest by changing its overall length, and can be placed below the seat 4.

[0059] (2.4) Configuration of the treatment drive unit The treatment drive unit 2 operates under the control of the control unit 61. The treatment drive unit 2 performs treatment on the user. In other words, the treatment drive unit 2 is a treatment unit of the massage device 1.

[0060] The treatment drive unit 2 is arranged on the guide rail 20 of the backrest 11 in a state in which it can move relative to the guide rail 20. More specifically, the treatment drive unit 2 is attached to the guide rail 20 in a state in which it can slide along the length of the guide rail 20. This allows the treatment drive unit 2 to treat a relatively wide area of ​​the user, for example, from the neck to the thighs.

[0061] As shown in FIG. 2 and FIGS. 7 to 8, the treatment drive unit 2 has a base 22 (see FIG. 7 or 8) and a pair of arms 23 (see FIG. 2).

[0062] The pair of arms 23 face each other in the left-right direction (second direction D2), which is a direction perpendicular to the up-down direction (first direction D1). The arms 23 are attached to the base 22. The pair of arms 23 move along the length of the guide rail 20 in response to the base 22 moving along the length of the guide rail 20. Furthermore, the pair of arms 23 in this embodiment can move toward and away from each other in the left-right direction (second direction D2).

[0063] The arm 23 has a first portion 231 and a second portion 232. The first portion 231 and the second portion 232 form an L-shape. A first treatment element 21A is provided at the tip of the first portion 231, and a second treatment element 21B is provided at the tip of the second portion 232. In other words, each of the pair of arms 23 has the first treatment element 21A and the second treatment element 21B. In other words, the treatment drive unit 2 has the first treatment element 21A and the second treatment element 21B. The first treatment element 21A and the second treatment element 21B treat multiple parts of the human body.

[0064] This makes it possible to widen the treatment range (or massage range) along the length of the guide rail 20. Furthermore, since the treatment range along the length of the guide rail 20 can be widened by the first treatment element 21A and the second treatment element 21B, it is possible to prevent the guide rail 20 from becoming long, and the massage device 1 can be made more compact.

[0065] In the following description, when the first treatment element 21A and the second treatment element 21B are not distinguished from each other, the first treatment element 21A and the second treatment element 21B may be simply referred to as "treatment element 21."

[0066] In the longitudinal direction of the guide rail 20, the first treatment element 21A is disposed closer to the first end 201 than the second treatment element 21B. In other words, the first treatment element 21A and the second treatment element 21B are located at different positions in the longitudinal direction of the guide rail 20. This makes it possible to widen the treatment range (or massage range) along the longitudinal direction of the guide rail 20. Furthermore, because the treatment range along the longitudinal direction of the guide rail 20 can be widened by the first treatment element 21A and the second treatment element 21B, it is possible to prevent the guide rail 20 from becoming too long, and the massage device 1 can be made more compact.

[0067] Furthermore, when the first treatment element 21A is located below the seat 4 and the backrest 11 is in the first reclining position, the second treatment element 21B is located above the first treatment element 21A. When the first treatment element 21A is located below the seat 4 and the backrest 11 is in the second position, the first treatment element 21A is located above the second treatment element 21B. That is, in this embodiment, the first treatment element 21A and the second treatment element 21B are displaced according to the degree of reclining (level of recline) of the backrest 11 (or the guide rail 20). In particular, when the first treatment element 21A is located below the seat 4, the positions of the first treatment element 21A and the second treatment element 21B can be displaced in the up-down direction according to the degree of reclining of the backrest 11.

[0068] By the way, increasing the number of treatment heads has the advantage of widening the treatment area, but there is a concern that the pressure will be dispersed and the massage force will decrease.

[0069] Here, the first treatment element 21A and the second treatment element 21B in this embodiment are displaced according to the degree of inclination (reclining degree) of the backrest 11 (or the guide rail 20). In particular, when the first treatment element 21A is positioned below the seat 4, the positions of the first treatment element 21A and the second treatment element 21B can be displaced in the up-down direction according to the degree of inclination of the backrest 11. This makes it possible to change the degree of contact of the first treatment element 21A and the second treatment element 21B with the human body, thereby improving the massage force.

[0070] In addition, the first treatment element 21A and the second treatment element 21B of this embodiment have kneading balls made of rubber at the portions that come into contact with the human body. That is, the first treatment element 21A and the second treatment element 21B have kneading balls. For example, the material of the kneading balls is natural rubber (NR). In the treatment element 21 of this embodiment, the kneading balls elastically deform when they come into contact with the human body, thereby enabling more comfortable treatment. In this embodiment, the kneading balls (or the treatment element 21) come into contact with the human body via fabric or the like.

[0071] In this embodiment, the hardness of the kneading balls of the first treatment element 21A is higher than that of the second treatment element 21B. In other words, the kneading balls of the first treatment element 21A are less likely to elastically deform than the kneading balls of the second treatment element 21B. This results in a smaller contact area between the kneading balls of the first treatment element 21A and the second treatment element 21B during treatment, thereby further improving the massage power of the first treatment element 21A.

[0072] In this embodiment, the "hardness" of the rubber is an index that indicates the ease (or resistance) of deformation of the rubber when a predetermined force is applied to the rubber. For example, when measured using a type A durometer, the hardness of the first massaging element 21A is 60±5 degrees, and the hardness of the second massaging element 21B is 38±5 degrees.

[0073] Furthermore, the first treatment element 21A and the second treatment element 21B of this embodiment further include a heater 101 (see FIGS. 7 and 8). The heater 101 is provided inside the kneading ball. The heater 101 generates heat under the control of the control unit 61. As a result, the massage device 1 of this embodiment can perform a warm massage using the first treatment element 21A and the second treatment element 21B.

[0074] The base 22 is a part of the treatment drive unit 2 that is attached to the guide rail 20. For example, the base 22 includes a movement mechanism that enables movement along the guide rail 20, and a drive mechanism that operates the pair of arms 23.

[0075] The movement mechanism has a motor and pinion gear (not shown). The pinion gear of the movement mechanism, together with the rack 203 of the guide rail 20, constitutes at least a part of a rack-and-pinion mechanism. The pinion gear is arranged to mesh with the rack 203 of the guide rail 20, and rotates by the rotational force of the motor. As the pinion gear, arranged to mesh with the rack 203, rotates, the base 22 of the treatment drive unit 2 moves along the guide rail 20. As the treatment drive unit 2 moves along the guide rail 20, the position of the treatment drive unit 2 changes in the up-down and front-back directions.

[0076] The treatment drive unit 2 of this embodiment has a drive mechanism, and is therefore capable of adjusting the protrusion amounts of the first treatment element 21A and the second treatment element 21B in a protrusion direction (fifth direction D5) perpendicular to the length direction (fourth direction D4) of the guide rail 20. The treatment drive unit 2 also operates the pair of arms 23 to move toward and away from each other in the left-right direction. That is, the treatment element 21 can perform a treatment operation involving a protrusion movement. The protrusion movement is a movement in which the treatment element 21 moves away from a reference position in a protrusion direction (fifth direction D5) perpendicular to the length direction (fourth direction D4) of the guide rail 20. For example, when the position of the second treatment element 21B in FIG. 7 is the reference position of the second treatment element 21B and the second treatment element 21B performs a protrusion movement, the second treatment element 21B moves away from the reference position in the protrusion direction (fifth direction D5) as shown in FIG. 8. 8 is the reference position of the first treatment element 21A, and when the first treatment element 21A performs a protruding operation, the first treatment element 21A moves away from the reference position in the protruding direction as shown in Fig. 7. The treatment drive unit 2 can adjust the protruding amount of the treatment element 21 in the protruding direction based on the control of the control unit 61.

[0077] Here, the "projection direction" is a direction perpendicular to both the longitudinal direction and the left-right direction of the guide rail 20. When the longitudinal direction (fourth direction D4) of the guide rail 20 is parallel to the up-down direction (first direction D1), the projection direction is parallel to the front-to-back direction (third direction D3), and when the projection operation is performed, the treatment element 21 is displaced forward from the reference position. Furthermore, the "projection amount" is the amount of displacement in the projection direction between the treatment element 21 at the reference position and the treatment element 21 at the position after projection.

[0078] In this embodiment, the protruding direction is the fifth direction D5. That is, in the massage device 1 of this embodiment, the treatment members 21 are movable in three directions: the length direction of the guide rail 20 (fourth direction D4), the left-right direction (second direction D2), and the protruding direction (fifth direction D5). The second direction D2, the fourth direction D4, and the fifth direction D5 are perpendicular to one another. In other words, the treatment members 21 are movable in three directions: the up-down direction (first direction D1), the left-right direction (second direction D2), and the front-rear direction (third direction D3).

[0079] Moreover, the treatment driving unit 2 of this embodiment further includes a pressure sensor that detects the pressure applied to the treatment element 21. The treatment driving unit 2 outputs an electric signal (pressure information) corresponding to the pressure detected by the pressure sensor to the control unit 61.

[0080] According to the massage device 1 of this embodiment, the protrusion amount of the first treatment element 21A and the second treatment element 21B can be adjusted, so that the massage force for each part can be adjusted, and a more detailed and comfortable treatment can be performed.

[0081] (2.5) Seat Configuration 10 and 11, the seat 12 includes a seat frame 3, a support portion 31, a seat portion 4, and a belt 121. As described above, the seat frame 3 is connected to the back frame 200 (or guide rail 20) of the backrest 11. In other words, the seat 12 is connected to the backrest 11.

[0082] 3, the seat frame 3 has a U-shape with an open rear end when viewed from above. The seat frame 3 has a pair of first beams 302, a first connecting portion 301, a pair of front legs 303, a pair of rear legs 304, a pair of bases 305, a second connecting portion 306, a pair of mounting plates 307, and a pair of second beams 308.

[0083] The first beam portion 302 is rod-shaped. The longitudinal direction of the first beam portion 302 is along the front-rear direction (third direction D3). The pair of first beam portions 302 face each other in the left-right direction (second direction D2) with the pair of second beam portions 308 sandwiched therebetween. The pair of first beam portions 302 are spaced apart and parallel to each other.

[0084] The first connecting portion 301 has a rectangular parallelepiped shape. The longitudinal direction of the first connecting portion 301 is along the left-right direction (second direction D). The first connecting portion 301 connects the front ends of the pair of first beam portions 302.

[0085] The front legs 303 are shaped like a rectangular parallelepiped. The longitudinal direction of the front legs 303 is along the up-down direction (first direction D1). The pair of front legs 303 face each other in the left-right direction. The pair of front legs 303 are spaced apart and parallel to each other. The pair of front legs 303 protrude downward from the front ends of the pair of first beams 302.

[0086] The rear legs 304 are shaped like a rectangular parallelepiped. The longitudinal direction of the rear legs 304 is along the up-down direction. The pair of rear legs 304 face each other in the left-right direction. The pair of rear legs 304 are spaced apart and parallel to each other. The pair of rear legs 304 protrude downward from the rear ends of the pair of first beams 302. The pair of front legs 303 and the pair of rear legs 304 face each other in the front-to-rear direction. In addition, the pair of front legs 303 and the pair of rear legs 304 are spaced apart and parallel to each other.

[0087] The base 305 is shaped like a rectangular parallelepiped. The longitudinal direction of the base 305 is along the front-rear direction. The pair of bases 305 face each other in the left-right direction. The pair of bases 305 are spaced apart and parallel to each other. The base 305 connects the lower ends of the front legs 303 and the rear legs 304.

[0088] The second connecting portion 306 has a rectangular parallelepiped shape. The longitudinal direction of the second connecting portion 306 is aligned with the left-right direction. The second connecting portion 306 connects the front ends of the pair of base portions 305 together.

[0089] The pair of mounting plates 307 are fixed to the second connecting portion 306. The mounting plates 307 are plate-shaped. The normal direction of the main surface of the mounting plates 307 is along the left-right direction. The pair of mounting plates 307 face each other in the left-right direction. The pair of mounting plates 307 are spaced apart and parallel. The backrest drive unit 8 (see FIG. 4) is attached to the pair of mounting plates 307.

[0090] The second beam portion 308 has a rectangular parallelepiped shape. The longitudinal direction of the second beam portion 308 is along the front-rear direction (third direction D3). The pair of second beam portions 308 face each other in the left-right direction (second direction D2). The pair of first beam portions 302 are spaced apart and parallel to each other. The pair of second beam portions 308 are arranged so as to be sandwiched between the pair of first beam portions 302. The pair of second beam portions 308 are connected to the first connecting portion 301 and the pair of first beam portions 302.

[0091] The support portion 31 is disposed on the upper end of the seat frame 3 (more specifically, on top of the pair of second beam portions 308 and the first connecting portion 301). The support portion 31 has a first portion 311, a second portion 312, and a third portion 313. In other words, the seat 12 of this embodiment has the first portion 311, the second portion 312, and the third portion 313. The first portion 311 and the second portion 312 face each other in a second direction D2 that is perpendicular to the first direction D1, which is the up-and-down direction. The first portion 311 is disposed on one of the pair of second beam portions 308 of the seat frame 3, and the second portion 312 is disposed on the other of the pair of second beam portions 308. The third portion 313 connects the first portion 311 and the second portion 312 along the second direction D2. More specifically, the third portion 313 connects the front end of the first portion 311 and the front end of the second portion 312 along the second direction D2. In other words, the shape of the support part 31 is U-shaped with an open rear end when viewed in a plan view from above.

[0092] The third portion 313 has a pair of recesses 314 aligned in the second direction D2. The pair of recesses 314 are formed from one end (first end) to the other end (second end) of the third portion 313 in a third direction D3 that is perpendicular to both the first direction D1 and the second direction D2. The pair of recesses 314 are portions on which the user's thighs are placed via the outer cover or the like. This makes it easier to determine the position of the user's thighs, improving the stability of the user's seated posture. Furthermore, since the portions on which the thighs are placed are recessed, the treatment elements 21 are closer to the thighs, thereby improving the massage force.

[0093] In this embodiment, the pair of recesses 314 are inclined upward as they move away from the backrest 11. In other words, the pair of recesses 314 are inclined upward as they approach the first end (front end). This makes it possible to prevent the human body from slipping forward during massage, and further improves the stability of the user's seated posture.

[0094] The seat portion 4 is bridged between a first portion 311 and a second portion 312 of the support portion 31. In this embodiment, both ends of the seat portion 4 in the left-right direction (second direction D2) are attached to a pair of second beam portions 308 of the seat frame 3. However, one left-right end of the seat portion 4 may be attached to the first portion 311 of the support portion 31, and the other left-right end of the seat portion 4 may be attached to the second portion 312 of the support portion 31. In other words, the seat portion 4 may be attached directly to the support portion 31, or may be attached to the seat frame 3 and thereby indirectly attached to the support portion 31. In other words, it is sufficient that the seat portion 4 is fixed to the seat frame 3 or the support portion 31.

[0095] As shown in FIG. 12 , the seat portion 4 includes a first sheet 41 (seat), a second sheet 42, a third sheet 43, and a fourth sheet 44. In this embodiment, the first sheet 41, the second sheet 42, the third sheet 43, and the fourth sheet 44 are hung between the first portion 311 and the second portion 312 of the support portion 31. The first sheet 41, the second sheet 42, the third sheet 43, and the fourth sheet 44 are stacked in the vertical direction. The first sheet 41, the second sheet 42, the third sheet 43, and the fourth sheet 44 are arranged in the order of the fourth sheet 44, the first sheet 41, the second sheet 42, and the third sheet 43 from top to bottom. In other words, the second sheet 42 and the third sheet 43 are disposed between the first sheet 41 and the guide rail 20 of the backrest portion 11.

[0096] 11, the first sheet 41 has a first side 411 which is an end (rear end) on the backrest 11 side (rear side). The first sheet 41 also has a second side 412 which is another side other than the first side 411 and is an end on the backrest 11 side. The first sheet 41 also has a protrusion 413.

[0097] The first side 411 of the first sheet 41 is oblique to the length direction of the guide rail 20 (fourth direction D4) in a plan view from the first direction D1. Here, "the first side 411 is oblique to the fourth direction D4 in a plan view from the first direction D1" means "the first side 411 and the fourth direction D4 are not perpendicular to each other in a plan view from the first direction D1." In this embodiment, the first side 411 is curved, and a tangent to an intersection of the first side 411 is oblique to the fourth direction D4 in a plan view from the first direction D1. The first side 411 may be a straight line.

[0098] The second side 412 of the first sheet 41 is oblique to the length direction of the guide rail 20 (fourth direction D4) in a plan view from the first direction D1. Here, "the second side 412 is oblique to the fourth direction D4 in a plan view from the first direction D1" means "the second side 412 and the fourth direction D4 are not perpendicular to each other in a plan view from the first direction D1." In this embodiment, the second side 412 is curved, and a tangent to an intersection of the second side 412 is oblique to the fourth direction D4 in a plan view from the first direction D1. The second side 412 may be straight.

[0099] 11 are paths along which the pair of first treatment elements 21A slide along the guide rail 20. In this embodiment, the pair of paths Ax1 are parallel to the longitudinal direction of the guide rail 20. In this embodiment, the first side 411 and the second side 412 intersect with the pair of paths Ax1 in a plan view from the up-down direction (first direction D1). More specifically, in a plan view from the first direction D1, the first side 411 is oblique to one of the pair of paths Ax1, and the second side 412 is oblique to the other of the pair of paths Ax1.

[0100] Here, "the first side 411 is oblique to one of the pair of trajectories Ax1 in a plan view from the first direction D1" means "the first side 411 and one of the pair of trajectories Ax1 are not perpendicular to each other in a plan view from the first direction D1." In the present embodiment, the first side 411 is curved, and a tangent to an intersection of the first side 411 is oblique to one of the pair of trajectories Ax1 in a plan view from the first direction D1. Similarly, "the second side 412 is oblique to the other of the pair of trajectories Ax1 in a plan view from the first direction D1" means "the second side 412 and the other of the pair of trajectories Ax1 are not perpendicular to each other in a plan view from the first direction D1." In the present embodiment, the second side 412 is curved, and a tangent to an intersection of the second side 412 is oblique to the other of the pair of trajectories Ax1 in a plan view from the first direction D1.

[0101] Here, in a plan view from the first direction D1, the intersection angle α2 (the intersection angle on the acute angle side) between the first side 411 and one of the pair of trajectories Ax1 is not a right angle. The intersection angle α2 is preferably 20° or more and less than 70°. The intersection angle α2 is more preferably 30° or more and less than 60°, and further preferably 40° or more and less than 50°. Similarly, in a plan view from the first direction D1, the intersection angle α3 (the intersection angle on the acute angle side) between the second side 412 and the other of the pair of trajectories Ax1 is not a right angle. The intersection angle α3 is preferably 20° or more and less than 70°. The intersection angle α3 is more preferably 30° or more and less than 60°, and further preferably 40° or more and less than 50°. In this embodiment, the intersection angle α2 and the intersection angle α3 are (approximately) the same angle. However, the intersection angle α2 and the intersection angle α3 may be different angles.

[0102] In the massage device 1 of this embodiment, when the treatment elements 21 move from the backrest 11 side to the seat 12 side, the treatment elements 21 may come into contact with the first sheet 41. Here, "the treatment elements 21 may come into contact with the first sheet 41" includes the case where the treatment elements 21 come into contact with the first sheet 41 via a sheet or outer cover other than the first sheet 41, such as the second sheet 42 or the third sheet 43. The first sheet 41 is, for example, a tarpaulin fabric. The material of the first sheet 41 includes polyvinyl chloride (PVC). In the massage device 1 of this embodiment, the main role of the first sheet 41 is to support the weight of the user, and the first sheet 41 has a relatively high tensile strength and is not easily stretched. Because the tensile strength of the first sheet 41 is relatively high, for example, the treatment elements 21 may get caught on the end (first side 411) of the first sheet 41.

[0103] In the massage device 1 of this embodiment, the first side 411 and the second side 412, which are the ends of the first sheet 41 on the backrest 11 side, are inclined with respect to the longitudinal direction of the guide rail 20. This makes it possible to prevent the treatment elements 21 from getting caught on the first side 411 and the second side 412 of the first sheet 41, and to prevent the first sheet 41 from breaking or the treatment elements 21 (or the treatment drive unit 2) from breaking.

[0104] Furthermore, in the massage device 1 of this embodiment, the first side 411 and the second side 412 of the first sheet 41 are covered with the third sheet 43 and do not come into direct contact with the treatment elements 21. This makes it possible to further prevent the treatment elements 21 from getting caught on the first side 411 and the second side 412 of the first sheet 41, and further prevents the first sheet 41 from breaking or the treatment elements 21 (or the treatment drive unit 2) from breaking.

[0105] Furthermore, the first sheet 41 of this embodiment is sewn to a sheet other than the first sheet 41. More specifically, the first side 411 and the second side 412 of the first sheet 41 of this embodiment are sewn to a sheet other than the first sheet 41. For example, the first side 411 and the second side 412 of the first sheet 41 are sewn to at least one of the second sheet 42 and the fourth sheet 44. In this embodiment, the first side 411 and the second side 412 of the first sheet 41 are sewn to the second sheet 42. This can further prevent the treatment head 21 from getting caught on the end of the first sheet 41.

[0106] In this embodiment, the first side 411 and the second side 412 form at least a part of the protrusion 413 (see FIG. 11). The protrusion 413 is attached to the belt 121. Here, the protrusion 413 being attached to the belt 121 includes the case where the protrusion 413 is attached to the belt 121 via the second seat 42, the third seat 43, etc. The protrusion 413 is the uppermost part of the first seat 41 when the backrest 11 is in the first reclined position.

[0107] The material of the second sheet 42 includes polypropylene, nylon, or polyester. In this embodiment, the material of the second sheet 42 includes nylon. In other words, the second sheet 42 is a cloth. As shown in FIG. 13 , the second sheet 42 has warp yarns 421 and weft yarns (not shown).

[0108] The material of the third sheet 43 includes polypropylene, nylon, or polyester. In this embodiment, the material of the third sheet 43 includes nylon. In other words, the third sheet 43 is a cloth. The third sheet 43 has warp threads 431 and weft threads (not shown).

[0109] As shown in FIG. 13 , in this embodiment, the third sheet 43 is disposed such that the warp threads 431 of the third sheet 43 intersect with the warp threads 421 of the second sheet 42. In other words, in a plan view from the up-down direction (first direction D1), the warp threads 421 of the second sheet 42 and the warp threads 431 of the third sheet 43 intersect. Here, in a plan view from the first direction D1, the crossing angle α1 (the crossing angle on the acute angle side) between the warp threads 421 (first warp threads) and the warp threads 431 (second warp threads) is preferably 45° or greater. More preferably, the crossing angle α1 is 70° or greater. In this embodiment, the warp threads 421 of the second sheet 42 and the warp threads 431 of the third sheet 43 are perpendicular to each other.

[0110] The third sheet 43 of this embodiment comes into direct contact with the treatment elements 21. In the massage device 1 of this embodiment, the second sheet 42 and the third sheet 43 are arranged so that the warp threads 421 of the second sheet 42 and the warp threads 431 of the third sheet 43 cross each other, thereby reducing the frictional resistance between the second sheet 42 and the third sheet 43. This improves the sliding between the second sheet 42 and the third sheet 43, suppressing the rubbing noise between the fabrics and also preventing the third sheet 43 from being torn. In other words, the massage device 1 of this embodiment can improve the durability of the third sheet 43.

[0111] Furthermore, the third sheet 43 of this embodiment is looser than the second sheet 42. In other words, the third sheet 43 is looser than the second sheet 42. This can further improve the durability of the third sheet 43 and the treatment drive unit 2.

[0112] The material of the fourth sheet 44 includes polypropylene, nylon, or polyester. In this embodiment, the material of the fourth sheet 44 includes nylon. In other words, the fourth sheet 44 is a cloth.

[0113] The belt 121 is a belt that extends along the length of the guide rail 20. The material of the belt 121 includes polypropylene, nylon, or polyester. In this embodiment, the material of the belt 121 includes polyester. In this embodiment, one end (front end) of the belt 121 is fixed to the first connecting portion 301 (front end) of the seat frame 3. The other end (rear end) of the belt 121 is fixed to the second connecting portion 205 of the back frame 200 of the backrest 11. In other words, the belt 121 is positioned higher as it approaches the second connecting portion 205 of the back frame 200 from the front end of the seat frame 3. In this embodiment, the belt 121 is positioned below the seat 4 so as to lift up the seat 4. Since the belt 121 is positioned below the seat 4, the backrest 11 side of the seat 4 is supported, preventing the body from sagging and preventing the seat 4 from stretching, thereby improving the load-bearing capacity of the seat 12 (or the seat 4). It should be noted that if the seat portion 4 has sufficient strength (load bearing capacity), the front end of the belt 121 does not need to be fixed to the seat frame 3.

[0114] (2.6) Ottoman configuration As shown in Figures 1 and 2, the ottoman 15 is disposed in front of the seat 12. The ottoman 15 supports the lower legs of the user. The upper end of the ottoman 15 is rotatably supported by the seat 12. The ottoman 15 rotates relative to the seat 12 around the upper end of the ottoman 15 in response to the operation of the ottoman drive unit 150 (see Figure 23). The rotation axis of the ottoman 15 is along the left-right direction. The ottoman drive unit 150 rotates the ottoman 15 based on the control of the control unit 61. This causes the ottoman 15 to rotate so that the tip of the ottoman 15 rises upward (see Figure 22).

[0115] (2.7) Airbag configuration Each of the plurality of airbags 50 is connected to a pump 72 (see FIG. 23) via an electromagnetic valve, an air hose, etc. (not shown). The airbags 50 inflate and deflate by supplying and discharging air. In this embodiment, each of the plurality of airbags 50 has a plate-like shape when not inflated. The airbags 50 perform a treatment action on the user by inflating and deflating. The material of the airbags 50 includes polyethylene.

[0116] 2, the plurality of airbags 50 are arranged at various locations on the massage device 1 so as to face the human body via the outer skin or the like. As described above, the plurality of airbags 50 include a first airbag 51, a second airbag 52, a third airbag 53, a fourth airbag 54, a fifth airbag 55, a sixth airbag 56, a seventh airbag 57, an eighth airbag 58, and a ninth airbag 59.

[0117] The first airbag 51, the second airbag 52, and the third airbag 53 are arranged at positions that allow treatment to be performed on the vicinity of the user's shoulders and upper arms. The first airbag 51 is provided on the backboard 111. The first airbag 51 is provided at a position facing the vicinity of the user's shoulder blades. The second airbag 52 is provided on the backboard 111. The second airbag 52 is provided at a position facing the vicinity of the back of the user's upper arms. The third airbag 53 is provided on the outer side of the backboard 111 in the left-right direction. The third airbag 53 is provided at a position facing the vicinity of the user's shoulders and the front of the upper arms.

[0118] The fourth airbag 54 and the fifth airbag 55 are disposed at positions that allow treatment to be performed on the vicinity of the user's forearm. The fourth airbag 54 is provided in the armrest 16. The fourth airbag 54 is provided at a position facing the vicinity of the front side of the user's forearm. The fifth airbag 55 is provided in the armrest 16. The fifth airbag 55 is provided at a position facing the vicinity of the back side of the user's forearm.

[0119] The sixth airbag 56 and the seventh airbag 57 are disposed in positions that allow treatment to be performed on the vicinity of the user's thighs. As will be described later, the sixth airbag 56 and the seventh airbag 57 are included in the thigh treatment section 14. The sixth airbag 56 and the seventh airbag 57 are provided on the outer side of the seat section 4 (or the seating section 12) in the left-right direction. The sixth airbag 56 is disposed rearward of the seventh airbag 57.

[0120] The eighth airbag 58 and the ninth airbag 59 are disposed at positions where a treatment operation can be performed on the user's lower limbs. More specifically, the eighth airbag 58 is disposed at a position where a treatment operation can be performed on the user's lower legs. The ninth airbag 59 is disposed at a position where a treatment operation can be performed on the user's feet. The eighth airbag 58 and the ninth airbag 59 are provided on the ottoman 15. The eighth airbag 58 is disposed closer to the seat 12 than the ninth airbag 59. The eighth airbag 58 is disposed so as to sandwich the user's right lower leg and left lower leg from the left and right directions. The ninth airbag 59 is disposed so as to sandwich the user's right foot and left foot from the left and right directions.

[0121] (2.8) Configuration of thigh treatment area 1 and 2, the pair of thigh treatment units 14 face each other in the left-right direction (second direction D2). The pair of thigh treatment units 14 are provided on the sides of the seat unit 4 in the left-right direction perpendicular to the up-down direction (first direction D1). When the sixth airbag 56 and seventh airbag 57 included in the thigh treatment units 14 are not inflated, the shape of the thigh treatment units 14 is plate-like.

[0122] The thigh treatment unit 14 operates to sandwich the thighs of a person sitting on the seat unit 4 between itself and the seat unit 4. More specifically, the thigh treatment unit 14 can be tilted toward the seat unit 4 from a default position in which it is leaned against the seat unit 4. In other words, by tilting the thigh treatment unit 14 toward the seat unit 4, the thigh treatment unit 14 operates to press the user's thighs toward the seat unit 4. When the user's thighs are being treated from below by the first treatment element 21A, the thigh treatment unit 14 prevents the user's thighs from moving upward, thereby further improving the massage force around the thighs.

[0123] Thigh treatment section 14 of this embodiment has sixth airbag 56 and seventh airbag 57. More specifically, thigh treatment section 14 of this embodiment sandwiches the user's thighs between sixth airbag 56, seventh airbag 57 and seat section 4, and performs treatment. With massage device 1 of this embodiment, treatment can be performed on the user's thighs from above and below, allowing for more comfortable treatment.

[0124] (2.9) Configuration of fixing parts As shown in Fig. 3, the fixing part X1 is attached to the left front leg part 303 of the seat frame 3. As shown in Fig. 14, the fixing part X1 is a part that fixes a part X3 such as a power cable, a signal cable, or a hose provided in the massage device 1.

[0125] The fixing part X1 has a first plate portion X11, a second plate portion X12, a third plate portion X13, and a fourth plate portion X14. The first plate portion X11, the second plate portion X12, the third plate portion X13, and the fourth plate portion X14 are shaped like a plate. In the fixing part X1 of this embodiment, the first plate portion X11, the second plate portion X12, the third plate portion X13, and the fourth plate portion X14 are integrally formed.

[0126] The first plate portion X11 and the second plate portion X12 are attached to the front leg portion 303 on the left side of the seat frame 3 so as to face the front leg portion 303. In the example of Fig. 3, the fixing part X1 is attached to the front leg portion 303 in a state where the rear surface of the first plate portion X11 is in contact with and faces the front surface of the front leg portion 303, and the left surface of the second plate portion X12 is in contact with and faces the right surface of the front leg portion 303. The first plate portion X11 has a through hole X111. A fastening part such as a screw is passed through the through hole X111, and the fixing part X1 is fixed to the front leg portion 303 by the fastening part.

[0127] The second plate portion X12 protrudes rearward from the right end of the first plate portion X11. The third plate portion X13 protrudes diagonally rearward to the right from the rear end of the second plate portion X12. The fourth plate portion X14 is disposed so as to be continuous with the right end of the third plate portion X13. The third plate portion X13 and the fourth plate portion X14 form a T-shape in a plan view from the top-bottom direction.

[0128] The fourth plate portion X14 has a plurality of first recesses X141 (two in the example of FIG. 14 ) and second recesses X142. The second recesses X142 are formed so as to be sandwiched between two first recesses X141. The first recesses X141 are recessed inward of the fourth plate portion X14 in the up-down direction. The second recesses X142 are recessed inward of the fourth plate portion X14 in the normal direction to the main surface of the fourth plate portion X14. The first recesses X141 function as positioning portions for the cable ties X2 that bind the fourth plate portion X14 and the component X3. The second recesses X142 function as positioning portions for the cable ties X2 that bind the component X3 bound together with the fourth plate portion X14 to another component X3.

[0129] That is, the fixing part X1 of this embodiment can be attached to the seat frame 3, and can bundle together multiple parts X3. This allows the multiple parts X3 to be efficiently bundled together in a space such as the seat part 4 of the seat part 12. In this embodiment, the multiple parts X3 are power cables, signal cables, or hoses that pass between the seat part 12 and the ottoman 15.

[0130] (2.10) Armrest Configuration 1 and 2, the armrests 16 (a pair of left and right arms) support the user's forearms, including their elbows. The armrests 16 are disposed outside the shoulder walls 112 and the side cover portions 18.

[0131] As shown in Figures 19 and 20, the armrest 16 has a first hook 161. The first hook 161 has an L-shape in plan view from the vertical direction. The first hook 161 protrudes inward from the armrest 16 and then protrudes rearward. The first hook 161 corresponds to a second hook 113 provided on the shoulder wall 112. The second hook 113 has an L-shape in plan view from the front-to-rear direction. The second hook 113 protrudes outward from the shoulder wall 112 and then protrudes upward.

[0132] For example, when attaching the armrest 16 to the main body (the backrest 11, the seat 12, etc.), the worker aligns the first hook 161 with the second hook 113 and lowers the armrest 16 from above toward the side cover 18. When lowering the armrest 16 from above, the worker ensures that the first hook 161 is caught on the second hook 113. The worker then slides the armrest 16 rearward, attaching the armrest 16 to the main body. The worker then secures the armrest 16 and the side cover 18 together with fasteners such as screws.

[0133] In this way, the massage device 1 of this embodiment has the first hook 161 and the second hook 113 corresponding to each other, which makes it easy for a worker to attach the armrest 16 to the main body. In other words, the massage device 1 can simplify the assembly of the armrest 16.

[0134] 22, when the backrest 11 of the massage device 1 is in the second tilt position (fully reclined position), the inclined surfaces 162 of the armrests 16 and the inclined surfaces 114 of the shoulder wall portions 112 are generally parallel to the installation surface. As a result, when the massage device 1 is fully reclined, the upper end of the massage device 1 is generally horizontal, resulting in an excellent design.

[0135] (2.11) Side cover configuration As shown in Figures 1 and 2, the side cover portion 18 is disposed on the outside of the seat 12 in the left-right direction. As shown in Figures 17 and 18, the side cover portion 18 has a main body portion 180 inside an outer skin or the like. The main body portion 180 is attached to the seat frame 3. A support part 33 is attached to the front leg part 303 of the seat frame 3. The main body portion 180 has a guide hole 181. With the connecting part 32 inserted into the guide hole 181, the connecting part 32 is attached to the first beam part 302 of the seat frame 3, thereby attaching the main body portion 180 to the seat frame 3. Because the guide hole 181 is an elongated hole, the main body portion 180 is attached to the seat frame 3 so as to be slidable.

[0136] The main body 180 is attached to the guide rail 20 by a connecting shaft 183 in a state where it can rotate about a rotation axis Ax3. The main body 180 is also connected to the armrest 16 by fastening parts such as screws.

[0137] Because the main body 180 is attached to the guide rail 20, when the guide rail 20 tilts, the main body 180 also tilts. When the guide rail 20 tilts, the main body 180 is pulled by the guide rail 20 in the tilting direction of the guide rail 20. Here, the main body 180 is also attached to the seat frame 3 by the connecting part 32, so that tilting is limited. The main body 180 tilts while sliding along the longitudinal direction of the guide hole 181. As a result, the amount of tilt of the main body 180 with respect to the guide rail 20 differs from the amount of tilt of the main body 180, and the amount of tilt of the main body 180 is smaller than the amount of tilt of the guide rail 20.

[0138] Because the main body 180 and the armrest 16 are fixed together, the main body 180 and the armrest 16 tilt while sliding together. In other words, when the backrest 11 tilts, the armrest 16 does not tilt as much as the backrest 11. For example, when the backrest 11 tilts 40°, the armrest 16 tilts 23°. This has the advantage that even when the backrest 11 tilts, the position (angle) of the user's elbow (forearm) does not change significantly, making it easier to stabilize the user's elbow.

[0139] Furthermore, in this embodiment, the armrest 16 tilts in conjunction with the backrest 11, although the tilt amount is smaller than that of the backrest 11. As a result, the armrest 16 and the shoulder wall 112 tilt in conjunction with each other, so that the armrest 16 is always positioned outside the shoulder wall 112. As a result, when viewed from the left and right in a plan view, no gap is formed between the armrest 16 and the shoulder wall 112 even when the backrest 11 is tilted.

[0140] (2.12) Rear cover configuration As shown in Figure 19, the rear cover part 17 is disposed below the backrest part 11 and behind the seat part 12. The rear cover part 17 is attached to the back frame 200 (see Figure 3). As shown in Figure 16, the rear cover part 17 has a long hole 171 that is long along the left-right direction. The rear cover part 17 also has a pair of left and right first attachment pieces 172 and a pair of left and right second attachment pieces 173.

[0141] For example, a worker attaching the rear cover part 17 to the back frame 200 passes the support plate 264 (see FIG. 15 ) of the attachment part 26 of the back frame 200 through the long hole 171 of the rear cover part 17. This causes the rear cover part 17 to be hooked onto the back frame 200, and one end of the rear cover part 17 is supported by the back frame 200. While supporting the rear cover part 17 hooked onto the support plate 264 from below with, for example, one hand, the worker passes screws through the first attachment piece 172 and the second attachment piece 173 to fix the rear cover part 17 to the back frame 200.

[0142] According to the massage device 1 of this embodiment, by passing the support plate 264 of the mounting portion 26 of the back frame 200 through the long hole 171 of the back cover portion 17, the back cover portion 17 is hooked onto the back frame 200, which has the advantage of making it easy to attach the back cover portion 17 to the back frame 200.

[0143] 21 and 22, the rear cover part 17 faces the leg cover part 19 in the up-down direction. The leg cover part 19 covers a pair of base parts 305 (see FIG. 3) of the seat frame 3 and the like.

[0144] The main surface 174 of the rear cover part 17 is a curved surface that moves away from the installation surface of the massage device 1 as it approaches the rear end. The main surface 191 of the foot cover part 19 is an inclined surface that moves closer to the installation surface of the massage device 1 as it approaches the rear end. As a result, the gap between the main surface 174 of the rear cover part 17 and the main surface 191 of the foot cover part 19 becomes larger as they approach their rear ends.

[0145] (2.13) Power supply configuration The power supply unit 100 is electrically connected to, for example, a commercial power supply (not shown). The power supply unit 100 converts AC voltage supplied from the commercial power supply into DC voltage. The power supply unit 100 of this embodiment converts AC 100 V supplied from the commercial power supply into DC 24 V. The power supply unit 100 of this embodiment outputs DC 24 V to the airbag drive unit 7, backrest drive unit 8, ottoman drive unit 150, etc. Note that the power supply unit 100 may also have a function of converting AC 100 V supplied from the commercial power supply into a voltage less than DC 24 V, or a function of converting DC 24 V converted by the power supply unit 100 into a voltage less than DC 24 V.

[0146] In addition, in the massage device 1 of this embodiment, the treatment drive unit 2 is driven by AC 100V supplied from a commercial power source. In other words, the massage device 1 of this embodiment has a hybrid power supply structure in which the drive voltage varies depending on the configuration. This allows the current flowing from the power supply unit 100 to be reduced, and the diameter of the power cable connected to the power supply unit 100 to be reduced.

[0147] (2.14) Configuration of the operation unit 1 and 2, the operation unit 13 of this embodiment is provided on the right armrest 16 so as to protrude upward from the armrest 16. The operation unit 13 accepts operations such as course setting (or selection), strength level setting (or selection), treatment action adjustment, on / off setting of each function, and adjustment of the tilt amount (tilt angle) of the backrest 11.

[0148] In this embodiment, a "course" refers to a massage (treatment) course performed by the massage device 1, and refers to a set of a series of treatment actions performed in a predetermined order (treatment order). The massage device 1 of this embodiment executes a course selected by the user from a plurality of courses. The plurality of courses include a rubbing course, a kneading and massaging course, a refreshing acupressure course, and a stretching course. Each course is associated with a treatment order, a treatment area, the strength of the treatment action, and a treatment method. A "treatment method" refers to a treatment method (or type), such as kneading, vertical kneading, acupressure (pressure), stretching, kneading, rubbing, stretching, or loosening. In this embodiment, a series of massages included in a course may be called a "course massage."

[0149] The "intensity level" in this embodiment refers to the level of intensity of the treatment action performed by the massage device 1. The intensity of the treatment action performed by the massage device 1 changes depending on the intensity level. In other words, the intensity level is a level related to the intensity of the treatment action performed by the treatment drive unit 2, and is a level related to the intensity of the treatment action performed by the multiple airbags 50. For example, the higher the intensity level, the greater the pressure applied to the human body, and the lower the intensity level, the less the pressure applied to the human body. For example, in the massage device 1, the higher the intensity level, the greater the protrusion amount of the treatment elements 21, and the lower the intensity level, the less the protrusion amount of the treatment elements 21. In this embodiment, the higher the intensity level, the stronger the intensity of the multiple treatment actions included in the course, on average. On the other hand, the lower the intensity level, the weaker the intensity of the multiple treatment actions included in the course, on average.

[0150] In the massage device 1 of this embodiment, the strength level can be set to any one of a plurality of levels. The operation unit 13 accepts an operation to set the strength level to any one of a plurality of levels including a predetermined level.

[0151] In this embodiment, the predetermined level is the weakest level of the treatment strength among the plurality of levels. This has the advantage that the user can easily adjust the treatment strength because the treatment element 21 does not protrude when the treatment strength is set to the weakest level.

[0152] The operation unit 13 of this embodiment has a touch panel display 131 (see FIG. 1). The touch panel display 131 displays and accepts operations related to various settings such as course setting (or selection), strength level setting (or selection), massage action adjustment, and on / off setting of each function. When the operation unit 13 accepts an operation, it outputs an operation signal corresponding to the accepted operation content to the control unit 61. In the following description, the operation signal that the operation unit 13 outputs to the control unit 61 may be simply referred to as an "operation signal."

[0153] As shown in FIG. 24, the touch panel display 131 displays a display screen ST0. The display screen ST0 includes a display screen ST1 and a display screen ST2. The display screen ST1 is also an operation screen. A button B1 is arranged on the display screen ST1. The button B1 is a button that accepts an operation to select one course from a plurality of courses. For example, by tapping (operating) the button B1, a display screen or menu for selecting a course is displayed on the touch panel display 131.

[0154] The display screen ST2 also serves as an operation screen. The display screen ST2 includes a display area R1, a display area R2, and a display area R3.

[0155] In the display region R1, an image G1 showing a human body and an image G2 showing the current treatment site are arranged.

[0156] In the display area R2 and the display area R3, a plurality of buttons are arranged for performing operations related to the treatment action being performed.

[0157] Display region R2 has buttons B2, B3, B4, and image G3 arranged therein. Buttons B2 and B3 accept an operation for setting the strength level. For example, by tapping button B2, the strength level is set to a strength level higher than the current strength level. Furthermore, by tapping button B3, the strength level is set to a strength level lower than the current strength level. Image G3 is an image showing the current (set) strength level. In this embodiment, the multiple levels are five levels, from level 1 to level 5. The strength of treatment increases in the order of level 5, level 4, level 3, level 2, and level 1. In this embodiment, level 1 is the predetermined level. Image G3 in FIG. 24 shows that the strength level is level 3.

[0158] The operation unit 13 of this embodiment accepts an operation to set the strength level both when a treatment operation is being performed and when a treatment operation is not being performed.

[0159] The button B4 is a button for performing operations related to the multiple massage functions of the massage device 1 of this embodiment. When the button B4 is tapped, the touch panel display 131 displays a display screen ST3, as shown in Fig. 25. In this embodiment, the display screen ST3 is displayed in place of the display screen ST2.

[0160] The display screen ST3 accepts an operation to switch the tapping massage function on / off, an operation to switch the warm massage function on / off (i.e., an operation to switch the heater 101 on / off), and an operation to switch the buttocks massage function on / off. Here, the "buttocks massage function" is a function to provide treatment to a second region. In this embodiment, the second region is a region including at least a part of the human body from the buttocks to the thighs.

[0161] A button B6 is arranged on the display screen ST3. The button B6 is a button for accepting an operation to switch the buttock massage function on / off. In other words, the operation unit 13 accepts an operation to turn the treatment operation for the second region on or off. Note that the operation unit 13 of this embodiment accepts an operation to set an operation to turn the treatment operation for the second region on or off, both when a treatment operation is being performed and when a treatment operation is not being performed. Note that in this embodiment, a setting in which the treatment operation for the second region is on is referred to as a "first setting," and a setting in which the treatment operation for the second region is off is referred to as a "second setting."

[0162] Furthermore, a button B5 is arranged on the display screen ST3. The button B5 is a button for closing the display screen ST3 or for transitioning from the display screen ST3 to another display screen such as the display screen ST2. In this embodiment, when the button B5 is tapped, the display screen ST3 is closed and the display screen ST2 is displayed instead of the display screen ST3.

[0163] (2.15) Airbag drive unit configuration As shown in Fig. 23, the airbag drive unit 7 has a pump drive circuit 71 and a pump 72. The airbag drive unit 7 also has a plurality of electromagnetic valves (not shown). The plurality of electromagnetic valves are connected to the pump 72. The plurality of electromagnetic valves correspond one-to-one to the first airbag 51 to the ninth airbag 59. Each of the plurality of electromagnetic valves is connected to the corresponding airbag 50 by an air hose (not shown).

[0164] The pump 72 is, for example, a diaphragm pump. The pump 72 transfers air by reciprocating a diaphragm with a motor L1 (see FIG. 26) included in the pump 72. The motor L1 is driven by a drive voltage output from a pump drive circuit 71.

[0165] The pump drive circuit 71 outputs a drive voltage to the motor L1 of the pump 72 under the control of the control unit 61, thereby driving the motor L1.

[0166] 26 and 27, the pump drive circuit 71 includes a full-bridge circuit in which a first switching element Q1, a second switching element Q2, a third switching element Q3, and a fourth switching element Q4 are bridge-connected. In the full-bridge circuit of the pump drive circuit 71, the first switching element Q1 and the second switching element Q2 are connected in series, and the third switching element Q3 and the fourth switching element Q4 are connected in series. The connection point between the first switching element Q1 and the second switching element Q2 is electrically connected to the connection point between the third switching element Q3 and the fourth switching element Q4 via the motor L1 of the pump 72. The first switching element Q1 and the third switching element Q3 are connected to the power supply unit 100, and the second switching element Q2 and the fourth switching element Q4 are connected to ground.

[0167] In the pump drive circuit 71 of this embodiment, the full-bridge circuit is controlled to alternate between a first switching state and a second switching state. In the first switching state, the first switching element Q1 is on (conducting state), the second switching element Q2 is off (non-conducting state), the third switching element Q3 is off, and the fourth switching element Q4 is on. As shown in FIG. 26, when the full-bridge circuit is controlled to the first switching state, a current I1 flows in the following order: power supply unit 100, first switching element Q1, motor L1, fourth switching element Q4, and ground.

[0168] In the second switching state, the first switching element Q1 is off, the second switching element Q2 is on, the third switching element Q3 is on, and the fourth switching element Q4 is off. As shown in Fig. 27, when the full-bridge circuit is in the second switching state, a current I2 flows in the following order: power supply 100, third switching element Q3, motor L1, second switching element Q2, and ground.

[0169] The full-bridge circuit is controlled to alternate between the first switching state and the second switching state, so that a square-wave drive voltage as shown in FIG.

[0170] As described above, the airbag driving unit 7 of this embodiment has the pump driving circuit 71, and thus can operate the pump 72 using the DC voltage supplied from the power supply unit 100.

[0171] (2.16) Memory Configuration The storage unit 62 includes, for example, a semiconductor memory such as a ROM (Read Only Memory) or an EEPROM (Electrically Erasable Programmable Read Only Memory). The storage unit 62 of this embodiment stores control information required for the control unit 61 to control the treatment operation performed by the treatment unit. In the following description, the control information stored in the storage unit 62 may be simply referred to as "control information."

[0172] The control information of this embodiment includes a control table for each course. In the following description, the control table may be simply referred to as a "table." The table of this embodiment is information in which the selected course, the strength level setting, the treatment order, the treatment area, the strength of the treatment action (e.g., the protrusion amount of the treatment element 21), and the treatment method are associated with each other. However, the table format (the way each piece of information is combined) may be other formats. For example, the storage unit 62 may store multiple tables in one-to-one correspondence with multiple courses, and each of the multiple tables may be information in which the strength level setting, the treatment order, the treatment area, the strength of the treatment action, and the treatment method are associated with each other.

[0173] (2.17) Control Unit Configuration The control unit 61 mainly comprises, for example, a computer system having one or more processors and a memory. The functions of the control unit 61 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunications line such as the Internet, or may be recorded on a non-transitory recording medium such as a memory card and provided.

[0174] The control unit 61 controls the operation of each unit of the massage device 1 based on the control information stored in the storage unit 62 and the operation signal output from the operation unit 13. More specifically, the control unit 61 controls the operation of the treatment drive unit 2, the airbag drive unit 7, the backrest drive unit 8, and the ottoman drive unit 150 based on the control information and the operation signal. The control unit 61 also controls the display of the touch panel display 131 based on the control information and the operation signal. The control unit 61 also controls the operation of the heater 101 based on the control information and the operation signal.

[0175] As described above, the treatment element 21 of this embodiment is movable in three directions: the longitudinal direction of the guide rail 20 (fourth direction D4), the left-right direction (second direction D2), and the protruding direction (fifth direction D5). The control unit 61 of this embodiment controls the treatment drive unit 2 to move the treatment element 21 in the three directions: the second direction D2, the fourth direction D4, and the fifth direction D5. Here, "moving the treatment element 21 in three directions" includes not only moving the treatment element 21 independently in each of the three directions, but also moving the treatment element 21 so that it traces an arc-shaped path so as to perform a kneading motion. For example, the control unit 61 of this embodiment moves the treatment element 21 so that it traces an arc-shaped path on a virtual plane whose normal direction is along the fifth direction D5 (in other words, on a virtual plane along the second direction D2 and the fourth direction D4).

[0176] The control unit 61 controls the plurality of treatment operations by the treatment unit based on the treatment order defined by the selected course. That is, the control unit 61 controls the plurality of treatment operations by the treatment drive unit 2 based on the selected course. The control unit 61 of this embodiment controls the plurality of treatment operations by the treatment unit based on a table corresponding to the selected course.

[0177] In this embodiment, some of the treatment operations defined in the course (or table) may be skipped in response to an operation signal. For example, when the treatment operation for a second region is switched from off to on by an operation on the operation unit 13 while the first control is being executed (i.e., when the setting is changed from the second setting to the first setting while the first control is being executed), the control unit 61 of this embodiment executes a second control different from the first control. The first control is a control for causing the treatment unit (at least one of the treatment drive unit 2 and the plurality of airbags 50) to treat a first region of the human body. The second control is a control for causing the treatment unit to treat a region other than the first region. Here, the first control and the second control are controls performed by the control unit 61 based on the table. In the table, the second control is a control performed after the first control. Note that the second control is a control for causing the treatment unit to treat a region that was not treated in the first control, and some of the regions treated in the first control and some of the regions treated in the second control may be the same region.

[0178] That is, when the massage device 1 of this embodiment is changed from the first setting to the second setting during execution of a course massage, it terminates the first control, skips part of the treatment sequence (or control) defined in the table, and executes the second control. Note that, when the massage device 1 is in the first setting at the start of the course massage and is not changed from the first setting to the second setting during execution of the course massage, it executes the second control based on the treatment sequence defined in the table. Also, when the massage device 1 remains in the second setting continuously during execution of the course massage, it does not execute the second control defined in the table.

[0179] According to the massage device 1 of the present embodiment, if the user desires treatment of a second region while multiple treatment operations included in a course are being performed, the first control is terminated and the second control is executed, thereby treating the region that was not treated by the first control. For example, if the user desires treatment of a second region while multiple treatment operations included in a course are being performed, the massage device 1 of the present embodiment terminates treatment of the first region currently being treated and starts treatment of another region. Here, the another region is, for example, a region between the first region and the second region, or the second region. In the following description, the region to which the user desires treatment may be referred to as a "specific region." In conventional massage devices, even when a treatment operation for treating a specific region is switched from off to on, it takes time for treatment of the specific region to be performed. In other words, in conventional massage devices, it takes time for treatment of the specific region to be performed, even if the user actively takes action to desire treatment of the specific region. According to the massage device 1 of this embodiment, by switching the treatment operation for a specific part, for example, the second part, from off to on, the first control is ended and treatment for another part is started, so that the time until treatment for the second part is started can be shortened and the second part can be treated more quickly. In other words, treatment for the part desired by the user can be given priority.

[0180] In this embodiment, the other region is the second region. In other words, in the second control by the control unit 61 of this embodiment, the treatment unit treats the second region. That is, in the massage device 1 of this embodiment, when the user switches the treatment operation for the second region from off to on, the treatment operation for the second region is immediately performed. This makes it possible to immediately perform treatment for the region that the user has made clear he / she desires to be treated.

[0181] As described above, in this embodiment, the second region is a region including at least a part of the human body from the buttocks to the thighs. In other words, in the massage device 1 of this embodiment, when a user desires treatment for a region including at least a part of the human body from the buttocks to the thighs and switches the buttock massage function from OFF to ON, treatment for the region including at least a part of the human body from the buttocks to the thighs can be given priority.

[0182] More specifically, the table of the selected course includes a plurality of blocks. Each block includes information on a plurality of treatment operations. For example, in the table of this embodiment, a block for primarily treating the arms (e.g., a first control for treating a first region) is followed by a block for primarily treating the legs, and then a block for primarily treating the buttocks (e.g., a second control for treating a second region). If the treatment operation for the buttocks is changed from OFF to ON by an operation on the operation unit 13 while the block for primarily treating the arms is being executed, the control unit 61 ends the control specified in the block for primarily treating the arms (first control), and executes the control specified in the block for primarily treating the buttocks (second control) without executing the control specified in the block for primarily treating the legs.

[0183] Furthermore, when the treatment operation for the second region is changed from OFF to ON by an operation on the operation unit 13 while the first control is being executed, the control unit 61 of this embodiment ends the first control and executes movement control. As described above, the treatment drive unit 2 is movable along the length direction of the guide rail 20 (fourth direction D4). The control unit 61 executes movement control to move the treatment drive unit 2 along the length direction of the guide rail 20. More specifically, the control unit 61 executes movement control to move the treatment drive unit 2 from a first treatment position (first position) to a second treatment position (second position). The first treatment position is a position corresponding to the first region, and the second treatment position is a position corresponding to a region different from the first region. In this embodiment, the different region is the second region, and the second treatment position is a position corresponding to the second region. Then, the control unit 61 of this embodiment executes movement control and then executes second control.

[0184] In other words, if the treatment operation for the second region is changed from OFF to ON by operating the operating unit 13 while the first control is being executed, the control unit 61 ends the first control, moves the treatment drive unit 2 from the first treatment position to the second treatment position, and then executes the second control. The first treatment position is a position corresponding to the first region, and the second treatment position is a position corresponding to the second region. In this embodiment, the other region is the second region, and the second treatment position is a position corresponding to the second region.

[0185] Here, the "position corresponding to the first region" refers to a position on the guide rail 20 of the treatment drive unit 2 (or the base 22) at which at least one of the first treatment element 21A and the second treatment element 21B can treat the first region. Similarly, the "position corresponding to the second region" refers to a position on the guide rail 20 of the treatment drive unit 2 (or the base 22) at which at least one of the first treatment element 21A and the second treatment element 21B can treat the second region. In this embodiment, the first position and the second position are defined on the table for each treatment region (or for each treatment order).

[0186] In this embodiment, the second treatment position is a position closer to the first end of the guide rail 20 than the first treatment position. Furthermore, when the backrest 11 is in the first reclined position, the second treatment position is lower than the first treatment position. Furthermore, when the treatment drive unit 2 is in the second treatment position, the second treatment position is further forward than the first treatment position. For example, when the treatment drive unit 2 is in the second treatment position, the first treatment element 21A is located below the seat 4. For example, when the treatment drive unit 2 is in the first treatment position, the first treatment element 21A is not located below the seat 4.

[0187] When the pressure applied to the treatment element 21 is lower than the target pressure, the control unit 61 controls the treatment element 21 to increase the protrusion amount so that the pressure applied to the treatment element 21 becomes the target pressure. When the pressure applied to the treatment element 21 is higher than the target pressure, the control unit 61 controls the treatment element 21 to decrease the protrusion amount so that the pressure applied to the treatment element 21 becomes the target pressure.

[0188] In this embodiment, the target pressure is predetermined and included in the control information. Depending on the target pressure setting, when the treatment drive unit 2 moves from the first treatment position to the second treatment position, the treatment element 21 can perform treatment on a third region (another region) between the first and second regions.

[0189] For example, the target pressure may be set to a pressure at which the treatment element 21 lightly touches the third region, so that when the treatment drive unit 2 moves from the first treatment position to the second treatment position, the treatment element 21 can perform a treatment that stretches the third region, such as the back.

[0190] The target pressure may be set to a pressure that prevents the treatment element 21 from coming into contact with the third region, thereby reducing the possibility that the treatment element 21 will come into contact with the third region when the treatment drive unit 2 moves from the first treatment position to the second treatment position, causing discomfort such as pain to the user.

[0191] In other words, when the treatment drive unit 2 moves from the first treatment position to the second treatment position, the control unit 61 adjusts the amount of protrusion of the treatment element 21 so that the pressure applied to the treatment element 21 becomes the target pressure, thereby making it possible to treat a third area between the first and second areas or to prevent the treatment element 21 from hitting the third area.

[0192] As described above, the treatment drive unit 2 can adjust the amount of protrusion of the treatment element 21 in the protruding direction (fifth direction D5). The treatment drive unit 2 also has a pressure sensor that detects the pressure applied to the treatment element 21 and outputs an electric signal (pressure information) to the control unit 61. In this embodiment, the control unit 61 adjusts the amount of protrusion of the treatment element 21 based on the pressure information in the movement control so that the pressure applied to the treatment element 21 becomes the target pressure. In other words, when the treatment drive unit 2 is moved from the first treatment position (first position) to the second treatment position (second position), the control unit 61 adjusts the amount of protrusion of the treatment element 21 so that the pressure applied to the treatment element 21 becomes the target pressure.

[0193] In addition, when the operation unit 13 receives an operation to set the strength level to a predetermined level, the control unit 61 of this embodiment controls the multiple treatment operations by the treatment drive unit 2 so that the treatment element 21 does not perform a protruding operation in at least some of the multiple treatment operations based on the selected course.

[0194] However, a user of a massage device with adjustable protrusion amounts of treatment applicators may feel that the strength of the treatment (massage) by the treatment applicators is too strong and may perform an operation to reduce the strength of the treatment. When the massage device receives an operation to reduce the strength of the treatment, it reduces the protrusion amount of the treatment applicators. However, depending on the user, even if the protrusion amount of the treatment applicators is reduced, the strength of the treatment by the treatment applicators may still be felt to be too strong.

[0195] According to the massage device 1 of this embodiment, when the operation unit 13 receives an operation to set the strength level to a predetermined level, the control unit 61 controls the treatment elements 21 so that they do not protrude. That is, according to the massage device 1 of this embodiment, the protrusion amount of the treatment elements 21 is set to zero when adjusting (or setting) the strength level, thereby expanding the range of treatment strength. As a result, in at least some of the multiple treatment operations, the treatment element 21 does not push the user's body, and the user's perception of the strength of the treatment can be reduced.

[0196] Furthermore, in the massage device 1 of this embodiment, the user can set the protrusion amount of the treatment elements 21 to zero by adjusting (or setting) the treatment intensity level, rather than by switching on / off the protrusion action of the treatment elements 21. This gives the user a positive impression that the massage device 1 of this embodiment has a wide range of treatment intensity level adjustment or that the treatment intensity level can be easily adjusted.

[0197] Furthermore, the control unit 61 of this embodiment controls a plurality of treatment operations by the treatment drive unit 2 according to a table in which the strength level settings are associated with the selected courses.

[0198] Furthermore, when the strength level is set to a predetermined level, the control unit 61 of this embodiment controls the treatment operations by the treatment drive unit 2 so that the treatment elements 21 do not perform a protruding motion in any of the treatment operations based on the selected course. This prevents the treatment element 21 from pushing out the user's body in any of the treatment operations, thereby further reducing the user's perception of the strength of the treatment.

[0199] As described above, the control unit 61 controls the operation of the heater 101 based on the control information and the operation signal. When the thermal massage function is turned on, the control unit 61 controls the heater 101 of the treatment drive unit 2 to heat. Furthermore, the control unit 61 may change the temperature of the heater 101 depending on the selected course. This allows the thermal massage to be performed at a temperature appropriate for each course.

[0200] Furthermore, among the multiple courses of this embodiment, there is a course that includes a "gentle pressure" treatment action. In the "gentle pressure" treatment action, the control unit 61 temporarily suspends the operation of the treatment element 21 for several seconds, and controls the treatment element 21 to gently press against the user's body. In this embodiment, the "gentle pressure" has three pause times (pressing times): 4 seconds, 8 seconds, and 12 seconds. The "gentle pressure" treatment action can be combined with a thermal massage to more effectively loosen up the human body.

[0201] As described above, the control unit 61 controls the operation of the backrest drive unit 8 based on the control information and the operation signal. For example, the control unit 61 may change the tilt amount (or tilt angle) of the backrest unit 11 depending on the selected course. This allows treatment to be performed at a tilt angle appropriate for each course.

[0202] Furthermore, when tilting the backrest 11 according to the selected course, the control unit 61 does not tilt the backrest 11 to the second tilt position (full reclining position). This makes it possible to prevent the backrest 11 from being tilted to an angle unintended by the user. When the control unit 61 receives a predetermined operation via the operation unit 13 to tilt the backrest 11 to the second tilt position, the control unit 61 controls the backrest 11 to tilt to the second tilt position.

[0203] Furthermore, the control unit 61 performs sensorless control in controlling the backrest drive unit 8, that is, in controlling the tilting of the backrest 11. The control unit 61 stores the current position (or tilt angle) of the movable unit 81 of the backrest drive unit 8 in a memory such as a RAM included in the control unit 61. The control unit 61 then calculates the tilt amount (or tilt angle) of the backrest 11 based on the moving speed and moving time of the movable unit 81. This allows the control unit 61 to perform sensorless control in controlling the tilting of the backrest 11, and the cost of the massage device 1 can be reduced by not using a sensor.

[0204] Furthermore, when the control unit 61 moves the treatment drive unit 2 along the guide rail 20, it determines the position of the treatment drive unit 2 based on detection signals from multiple sensors provided on the guide rail 20. Here, the multiple sensors are arranged in a line along the length of the guide rail 20. In this embodiment, the upper sensors provided at positions corresponding to the upper body of the human body and the lower sensors provided at positions corresponding to the lower body of the human body have different detection accuracy in the length direction of the guide rail 20. The upper sensors have higher detection accuracy (higher resolution) than the lower sensors. This can improve the accuracy of treatment for the upper body, which requires more precise control than the lower body.

[0205] (2.18) Other The massage device 1 comes with an instruction manual that describes how to use the massage device 1. The instruction manual includes a two-dimensional code. By reading the two-dimensional code with a device such as a smartphone, the OSS (Open Source Software) text can be displayed on the display of the device.

[0206] (3) Operation of the control unit Next, the operation of the massage device 1 (or the control unit 61) will be described with reference to FIG.

[0207] The flowchart shown in FIG. 29 shows the process when the massage device 1 performs a plurality of treatment operations based on courses.

[0208] First, the massage device 1 receives a selection operation for selecting a course at the operation unit 13 (step S1). Then, the massage device 1 receives a start operation for a course massage at the operation unit 13 (step S2), and starts the course massage (step S3).

[0209] During execution of the course massage, the massage device 1 determines at a predetermined timing whether the setting has been changed from the second setting to the first setting by operating the operating unit 13 (step S4). If the massage device 1 determines that the setting has been changed from the second setting to the first setting (step S4: No), it performs the process of step S8. On the other hand, if the massage device 1 determines that the setting has been changed from the second setting to the first setting (step S4: Yes), it ends the first control for performing the treatment operation on the first region (step S5). Then, the massage device 1 performs movement control to move the treatment elements 21 from the first treatment position to the second treatment position (step S6), and executes the second control for performing the treatment operation on the second region (step S7). Note that, when performing the movement control, the massage device 1 adjusts the protrusion amount of the treatment elements 21 so that the pressure applied to the treatment elements 21 becomes the target pressure.

[0210] Next, the massage device 1 determines whether the course has ended (step S8). If the massage device 1 determines that the course has not ended, that is, that there is an incomplete treatment action among the series of treatment actions defined in the table, the massage device 1 continues the course massage according to the table (step S9) and performs the process of step S4 at a predetermined timing. On the other hand, if the massage device 1 determines that the course has ended (step S8: Yes), the massage device 1 ends the series of processes shown in FIG.

[0211] By the massage device 1 executing the series of processes shown in FIG. 29, it is possible to give priority to the treatment of the area desired by the user.

[0212] It should be noted that the flowchart shown in FIG. 29 is merely an example, and the order of the processes may be changed as appropriate, and processes may be added or deleted as appropriate.

[0213] (4) Variations Modifications of the above embodiment are listed below.

[0214] Functions equivalent to those of the massage device 1 according to the above embodiment may be embodied as a control method, a (computer) program, a non-transitory recording medium having a program recorded thereon, or the like. A control method according to one embodiment is a control method executed by the massage device 1. The massage device 1 includes a treatment unit (treatment drive unit 2; multiple airbags 50) and an operation unit 13. The treatment unit treats multiple regions of the human body, including a first region and a second region. The operation unit 13 accepts an operation to turn on or off a treatment operation for the second region. The control method includes a control step. In the control step, multiple treatment operations by the treatment unit are controlled based on a treatment sequence defined by a selected course. In the control method step, when a treatment operation for the second region is changed from off to on by an operation on the operation unit 13 while a first control is being executed by the treatment unit to treat the first region, the first control is terminated and a second control is executed by the treatment unit to treat a region other than the first region. A control method according to one embodiment is a control method executed by the massage device 1. The massage device 1 includes a treatment drive unit 2 and an operation unit 13. The treatment drive unit 2 has treatment elements 21 and is arranged on the guide rail 20 so as to be movable relative to the guide rail 20. The treatment elements 21 are capable of performing treatment operations involving protruding motions. The protruding motion is a motion in which the treatment elements 21 move away from a reference position in a protruding direction (fifth direction D5) that is perpendicular to the longitudinal direction (fourth direction D4) of the guide rail 20. The operation unit 13 accepts an operation to set an intensity level related to the intensity of the treatment operations performed by the treatment drive unit 2 to one of a plurality of levels including a predetermined level. The control method includes a control step. In the control step, the treatment operations performed by the treatment drive unit 2 are controlled based on a selected course. In the control step, when the operation unit 13 accepts an operation to set the intensity level to the predetermined level, the treatment operations performed by the treatment drive unit 2 are controlled so that the treatment elements 21 do not perform protruding motions in at least some of the treatment operations based on the selected course. The program according to one aspect is a program for causing one or more processors included in the massage device 1 to execute the above control method.

[0215] The execution entity of the massage device 1 or the control method of the present disclosure includes a computer system. The computer system is primarily composed of a processor and memory as hardware. The processor executes a program stored in the memory of the computer system to realize the functions of the execution entity of the massage device 1 or the control method of the present disclosure. The program may be pre-stored in the memory of the computer system, provided via a telecommunications line, or provided in a non-transitory recording medium readable by the computer system, such as a memory card, optical disk, or hard disk drive. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits, such as ICs and LSIs, are referred to by different names depending on the degree of integration, and include integrated circuits called system LSIs, very large-scale integrations (VLSIs), or ultra-large-scale integrations (ULSIs). Furthermore, field-programmable gate arrays (FPGAs), which are programmed after the LSI is manufactured, or logic devices capable of reconfiguring the connections within the LSI or the circuit partitions within the LSI, can also be used as processors. The electronic circuits may be integrated into one chip or distributed across multiple chips. The chips may be integrated into one device or distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0216] In the above embodiment, the first massaging head 21A and the second massaging head 21B are made of natural rubber, but the first massaging head 21A and the second massaging head 21B may be made of chloroprene rubber (CR).

[0217] In the above embodiment, the first seat 41 has a protrusion 413. However, as shown in FIG. 30 , the first seat 41 may have a recess 414 instead of the protrusion 413. That is, the first seat 41 has a protrusion 413 or a recess 414. When the first seat 41 has the recess 414, the first side 411 and the second side 412 of the first seat 41 form at least a part of the recess 414. Furthermore, when the first seat 41 has the recess 414, the recess 414 is attached to the belt 121. That is, the protrusion 413 or the recess 414 of the first seat 41 is attached to the belt 121. The recess 414 may be attached to the belt 121 so as to be located at the uppermost position of the first seat 41 when the backrest 11 is in the first reclined position. That is, when the backrest 11 is in the first reclined position, the convex portion 413 or the concave portion 414 may be attached to the belt 121 so as to be located at the uppermost position of the first seat 41. Also, as shown in Fig. 31, the first seat 41 does not have to have the second side 412 and the convex portion 413 (or the concave portion 414).

[0218] In the above embodiment, the predetermined level is the weakest level of the strength of the treatment motion among the plurality of levels (the first level in the above embodiment), but the predetermined level does not necessarily have to be the weakest level of the strength of the treatment motion among the plurality of levels. For example, the first level and the second level may be the predetermined levels, or the first level, the second level, and the third level may be the predetermined levels.

[0219] In the movement control, the control unit 61 may control the pair of left and right treatment elements 21 to move away from each other, thereby moving the treatment drive unit 2 from the first treatment position to the second treatment position after or while widening the gap between the pair of left and right treatment elements 21 in the left-right direction. Here, the gap between the pair of left and right treatment elements 21 in the left-right direction is the gap between the pair of first treatment elements 21A and the gap between the pair of second treatment elements 21B. For example, the control unit 61 may move the treatment drive unit 2 from the first treatment position to the second treatment position after or while widening the gap between the pair of left and right treatment elements 21 so that the gap between the pair of left and right treatment elements 21 is equal to or greater than a predetermined gap. Furthermore, in the movement control, the control unit 61 may control the pair of left and right treatment elements 21 to widen the gap between the pair of left and right treatment elements 21 when the pressure applied to the pair of left and right treatment elements 21 is higher than the target pressure, so that the pressure applied to the pair of left and right treatment elements 21 becomes the target pressure. This reduces the possibility that when the treatment drive unit 2 moves from the first treatment position to the second treatment position, the pair of left and right treatment elements 21 will come into contact with the third area, causing pain or other discomfort to the user.

[0220] In the above embodiment, both the first treatment element 21A and the second treatment element 21B have the heater 101. However, one of the first treatment element 21A and the second treatment element 21B may have the heater 101. That is, the first treatment element 21A may have the heater 101 and the second treatment element 21B may not have the heater 101, or the first treatment element 21A may not have the heater 101 and the second treatment element 21B may have the heater 101.

[0221] In the above embodiment, the seat portion 4 is bridged between the first portion 311 and the second portion 312 of the support portion 31. However, it is sufficient that the seat portion 12 has the seat portion 4, and for example, the seat portion 4 may be arranged to be bridged between the pair of second beam portions 308 of the seat frame 3 without the support portion 31 interposed therebetween.

[0222] (Aspect) As is clear from the above-described embodiment and modified examples, the massage device (1) according to the first aspect includes a seat portion (12), a backrest portion (11), and a treatment drive unit (2). The seat portion (12) has a seat portion (4). The backrest portion (11) is tiltable relative to the seat portion (12). The backrest portion (11) has a guide rail (20). The treatment drive unit (2) is disposed on the guide rail (20) in a state where it is movable relative to the guide rail (20). The backrest portion (11) is tiltable between a first position and a second position. The second position is a position where the backrest portion (11) is tilted further back than the first position. A portion of the guide rail (20) is located below the seat portion (4). The guide rail (20) has a first end (201) and a second end (202). The first end (201) is the end of the guide rail (20) on the seat portion (12) side in the longitudinal direction (fourth direction D4). The second end (202) is the end opposite the first end (201) in the longitudinal direction. The treatment drive unit (2) has a first treatment element (21A) and a second treatment element (21B). In the longitudinal direction of the guide rail (20), the first treatment element (21A) is disposed closer to the first end (201) than the second treatment element (21B). When the first treatment element (21A) is located below the seat portion (4) and the backrest portion (11) is in the first position, the second treatment element (21B) is located above the first treatment element (21A). When the first treatment element (21A) is located below the seat portion (4) and the backrest portion (11) is in the second position, the first treatment element (21A) is located above the second treatment element (21B).

[0223] According to this aspect, it is possible to treat a wide range and improve the massage force.

[0224] In the massage device (1) according to the second aspect, in the first aspect, the first end (201) of the guide rail (20) is displaced upward as the backrest (11) tilts backward.

[0225] According to this embodiment, it is possible to improve the massage force when the backrest (11) is tilted backward.

[0226] In the massage device (1) according to the third aspect, in the first or second aspect, the treatment drive unit (2) further includes a pair of arms (23). The pair of arms (23) face each other in a direction (second direction D2) perpendicular to the up-down direction (first direction D1). Each of the pair of arms (23) includes a first treatment element (21A) and a second treatment element (21B).

[0227] According to this aspect, the massage force can be adjusted for each treatment area, allowing for more detailed and comfortable treatment.

[0228] In the massage device (1) according to the fourth aspect, in any of the first to third aspects, the treatment drive unit (2) is capable of adjusting the protrusion amount of the first treatment element (21A) and the protrusion amount of the second treatment element (21B) in a protrusion direction (fifth direction D5) perpendicular to the longitudinal direction (fourth direction D4) of the guide rail (20).

[0229] According to this aspect, more comfortable treatment can be performed.

[0230] In the massage device (1) according to the fifth aspect, in any one of the first to fourth aspects, the hardness of the first massage element (21A) is higher than the hardness of the second massage element (21B).

[0231] According to this embodiment, the massaging power of the first massaging element (21A) can be further improved.

[0232] The massage device (1) according to a sixth aspect is the massage device (1) of any one of the first to fifth aspects, further including a thigh treatment section (14). The thigh treatment section (14) holds the thighs of a person seated on the seat section (4) between the seat section (4) and the thigh treatment section (14).

[0233] According to this aspect, it is possible to further improve the massage force around the thighs.

[0234] In the massage device (1) according to the seventh aspect, in the sixth aspect, the thigh treatment section (14) has an airbag (141).

[0235] According to this aspect, more comfortable treatment can be performed.

[0236] In the massage device (1) according to the eighth aspect, in the sixth or seventh aspect, the thigh treatment section (14) is provided on the side of the seat section (4) in a direction (second direction D2) perpendicular to the vertical direction (first direction D1).

[0237] In the massage device (1) according to the ninth aspect, in any one of the first to eighth aspects, the first massage element (21A) and the second massage element (21B) are kneading balls made of rubber.

[0238] According to this aspect, more comfortable treatment can be performed.

[0239] The configurations other than the first aspect are not essential for the massage device (1) and can be omitted as appropriate. [Explanation of symbols]

[0240] 1 massage device 11 Backrest 12 Seat 14 Thigh treatment area 141 Airbag 2 Treatment drive unit 20 Guide rail 201 1st end 202 2nd end 21A 1st treatment child 21B 2nd treatment child 23 Arm 4 Seat section D1 1st direction D2 2nd direction D4 4th direction D5 5th direction

Claims

1. A massage device comprising a backrest, a treatment drive unit, a seat frame, and a backrest drive unit, The backrest portion has an arc-shaped back frame that is bent downward to be convex, The front end of the back frame is positioned below the thighs of a user seated on the massage device, the treatment drive unit is disposed on the back frame in a state in which it can move along the length direction of the back frame, and performs treatment on a plurality of parts of the user including the shoulders and buttocks; the seat frame supports the backrest with respect to an installation surface on which the massage device is installed; The backrest drive unit has a base and a movable unit, a lower end of the base is attached to a connecting portion along the left-right direction of a lower end of the seat frame below the thighs of the user seated on the massage device; The movable part is The back frame is attached to a connecting portion along the left-right direction at the front end thereof, and is slidable in the length direction of the base portion. As the movable portion slides, the backrest portion is tilted, When the backrest is in the most rearwardly tilted position, the backrest drive unit is positioned so as not to interfere with the treatment drive unit even when the treatment drive unit is positioned most forward with respect to the back frame. Massage device.

2. The seat frame is A pair of base portions connected by the connecting portion of the seat frame and extending in the front-rear direction; The seat further includes a pair of rear legs connected to the pair of bases, respectively, and extending in the up-down direction, The back frame is rotatably connected to the pair of rear legs. The massage device according to claim 1 .

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