Massage machine

Abstract

A massage machine 1 comprises: side wall parts 33, 38 that are disposed on both sides for holding a treatment target site 9 by sandwiching the same from both sides; a first oscillating mechanism 30 that causes a first side wall part 33, which is one of the side wall parts on either side, to oscillate along the circumferential direction of the treatment target site; and a pressing part 29 that presses the treatment target site from the back side at a location between the side walls on both sides.

Description

Technical Field

[0001] The present disclosure relates to a massage machine.

Background Art

[0002] Conventionally, massage machines for treating a subject have been known. For example, Patent Document 1 below discloses a massage unit including a first member and a second member provided along the circumferential direction of a body part of a subject, a first air cell and a second air cell provided on each of them, and a link mechanism for operating the first member and the second member. In this massage unit, it is possible to pinch and knead the body part of the subject by operating the first member and the second member by the link mechanism.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the massage unit described in Patent Document 1 above, although it is possible to perform treatment of pinching and kneading from both side portions of the body part, more diverse treatments are desired.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a massage machine capable of diversifying the treatment for a treatment target part.

Means for Solving the Problems

[0006] In order to achieve the above object, the massage machine according to the present disclosure includes side wall portions on both sides that hold the treatment area so as to sandwich it from both sides, and a first swing mechanism that swings one of the first side wall portions of the side wall portions on both sides along the circumferential direction of the treatment area. A drive shaft for oscillating the first oscillating mechanism, A pressing portion that presses the treatment area from the back side between the side wall portions on both sides. and an interlocking mechanism for displacing the pressing portion in conjunction with the first side wall portion oscillated by the first oscillating mechanism. The first oscillating mechanism includes a first eccentric cam rotated by the drive shaft, a cam receiving portion for rotatably receiving the first eccentric cam, and a first link member provided with the first side wall portion, and a guide portion for guiding a guided portion of the first link member so that the first side wall portion oscillates along the circumferential direction of the treatment target portion as the first eccentric cam rotates. The interlocking mechanism includes a pressing link member connected via a connecting portion so as to be rotatable relative to the first link member and provided with the pressing portion, and a guide portion for guiding a guided portion of the pressing link member so that the pressing portion projects and retracts from the back side as the first link member oscillates. It is characterized by comprising the above.

Effect of the Invention

[0007] By configuring the massage machine according to the present disclosure as described above, diversification of treatment for the treatment area can be achieved.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiment for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In some of the figures, some of the detailed reference numerals attached to other figures are omitted. In the following embodiments, the front-rear direction, left-right direction, and up-down direction will be described with reference to a subject seated on a massage machine in a backrest-up state. FIGS. 1 to 6 are diagrams schematically showing an example and a modified example of a massage machine according to the present embodiment.

[0010] As shown in FIGS. 4(a) and 6(a), the massage machine 1 according to the present embodiment includes side wall portions 33 and 38 on both sides that hold the treatment portion 9 so as to sandwich it from both sides, and a first swing mechanism (30) that swings one of the side wall portions 33 and 38 on both sides, i.e., the first side wall portion 33, along the circumferential direction of the treatment portion 9. With such a configuration, the first side wall portion 33 can be swung along the circumferential direction of the treatment portion 9 while the treatment portion 9 is sandwiched from both sides by the side wall portions 33 and 38 on both sides, and the treatment portion 9 can be effectively treated. The massage machine 1 includes a pressing portion 29 that presses the treatment portion 9 from the back side between the side wall portions 33 and 38 on both sides. With such a configuration, the treatment portion 9 can be treated from the back side, and the diversification of the treatment for the treatment portion 9 can be achieved as compared with that for only both sides. Further, since the treatment portion 9 can be pressed by the pressing portion 29 while being sandwiched from both sides by the side wall portions 33 and 38 on both sides, the stimulation by the pressing portion 29 on the treatment portion 9 can be effectively applied.

[0011] In the present embodiment, the side wall portions 33 and 38 on both sides are configured to be located on both sides of the calf that constitutes the treatment portion 9, and are provided in the calf treatment portion 13 that treats the calf. With such a configuration, the calf that constitutes the treatment portion 9 can be effectively treated. In the present embodiment, as shown in FIGS. 1 and 2(a), the massage machine 1 includes a left calf treatment portion 13A having side wall portions 33 and 38 on both sides, a first swing mechanism (30), and a pressing portion 29 that are arranged on both sides of the left calf that constitutes the treatment portion 9, and a right calf treatment portion 13B having side wall portions 33 and 38 on both sides, a first swing mechanism (30), and a pressing portion 29 that are arranged on both sides of the right calf that constitutes the treatment portion 9. With such a configuration, each of the left and right calves can be effectively treated. As shown in FIGS. 1(a) and 1(b), in this embodiment, these left and right calf treatment parts 13A and 13B are provided on the leg rest part (footrest) 10 of the massage machine 1 in the form of a chair. An example of the specific configuration of this leg rest part 10 will be described later.

[0012] The massage machine 1 includes a backrest part 2 that supports the back of the person to be treated and a seat part 3 on which the person to be treated sits. This massage machine 1 is provided so as to rise on both the left and right sides of the seat part 3 and includes armrest parts 4, 4 that support the arms of the person to be treated. The backrest part 2 is made to be reclinable (reclining) by a backrest drive part. This backrest part 2 may be made rotatable with respect to the seat part 3 with the lower end part on the seat part 3 side as a fulcrum, or may be configured to swing (rock) together with the seat part 3. As the backrest drive part, an electric actuator having a rod that is connected to the backrest part 2 and is extended and contracted by an appropriate motor may be used. The massage machine 1 may be provided with an appropriate inclination angle detection part that detects the inclination angle of the backrest part 2 in order to control the backrest drive part, and an appropriate stop means that stops the backrest drive part at the standing limit and the reclining limit, and the like.

[0013] The left and right armrest parts 4, 4 are provided extending from the seat part 3 side to the backrest part 2 side so as to be able to support the fingers, forearms, and upper arms of the person to be treated. These left and right armrest parts 4, 4 may be provided with arm receiving grooves that receive the left and right arms of the person to be treated, respectively. Appropriate treatment mechanisms such as air cells and rollers for treating the arms received in the arm receiving grooves of these left and right armrest parts 4, 4 may be provided. The massage machine 1 includes a treatment unit 5 that has left and right treatment elements 8A and 8B and constitutes a treatment part that is movable along the longitudinal direction of the body. In the illustrated example, the left and right treatment elements 8A and 8B are provided on one treatment unit 5. These left and right treatment elements 8A, 8B may be in the shape of rollers that are rotatable around an axis whose axial direction is generally the left - right direction.

[0014] The treatment unit 5 is movable within the massage machine 1 along a guide rail formed in a long shape along the longitudinal direction of the body. The guide rail is appropriately shaped to conform to the shape of the back of the body. This guide rail may be provided in a series over substantially the entire vertical direction of the backrest portion 2 and substantially the entire front-rear direction of the seat portion 3, or may be provided only on the backrest portion 2. This guide rail is provided in a pair at positions spaced apart left and right so as to guide the left and right end portions of the treatment unit 5. These left and right guide rails are provided with guide grooves for guiding guide portions such as rollers and pins provided at the left and right end portions of the treatment unit 5, and racks with which pinions provided at the left and right end portions of the treatment unit 5 mesh, etc.

[0015] Guide portions are provided at the left and right end portions of the treatment unit 5 to be guided along the guide grooves of the above-described left and right guide rails. The guide portions may be provided at two locations spaced apart in the longitudinal direction of the body at the left and right end portions of the treatment unit 5. Pinions that mesh with the racks of the left and right guide rails are provided at the left and right end portions of the treatment unit 5. The left and right pinions on both sides may be provided coaxially with respect to one of the guide portions in the longitudinal direction of the body. The treatment unit 5 is provided with a main body lifting drive unit for rotating the left and right pinions on both sides. This main body lifting drive unit is composed of an appropriate motor and rotates the left and right pinion shafts via an appropriate speed reducer. That is, when the main body lifting drive unit is driven, the left and right pinions on both sides of the treatment unit 5 rotate, and the treatment unit 5 moves in the longitudinal direction of the body along the racks of the left and right guide rails with which they mesh. The massage machine 1 is provided with a main body lifting position detection unit for detecting the lifting position of the treatment unit 5 moved by the main body lifting drive unit. As this main body lifting position detection unit, a rotary encoder for detecting the number of rotations of a rotating body rotated by the main body lifting drive unit may be used, or an appropriate sensor for detecting a detected portion provided on one of the treatment unit 5 and the guide rail may be used.

[0016] The treatment unit 5 is provided with a main body advancing / retreating drive unit that is driven when advancing and retreating the treatment unit main body 6 provided with the left and right treatment elements 8A and 8B in the front-rear direction with respect to the guide rail. The treatment unit main body 6 may be swingable with respect to the main body holding part of the treatment unit 5 so that, for example, with the lower end side as a fulcrum, the upper end side is displaced in a substantially front-rear direction that is substantially orthogonal to the longitudinal direction of the guide rail. As such a main body advancing / retreating mechanism, a pinion connected to a motor constituting the main body advancing / retreating drive unit via an appropriate speed reducer may be provided on one of the main body holding part and the treatment unit main body 6, and on the other, an arc-shaped rack that extends in a substantially front-rear direction and meshes with the pinion may be provided. That is, when the main body advancing / retreating drive unit is driven, the pinion rotates, and along with the left and right treatment elements 8A and 8B, the upper end side of the treatment unit main body 6 advances and retreats in a substantially front-rear direction along the arc-shaped rack with which it meshes. The main body advancing / retreating mechanism is not limited to the above configuration, and may be configured to linearly advance and retreat the treatment unit main body 6 with respect to the guide rail, or may have various other configurations. The massage machine 1 is provided with a main body advancing / retreating position detection unit that detects the advancing / retreating position of the treatment unit main body 6 moved by the main body advancing / retreating drive unit. The main body advancing / retreating position detection unit may be the same as the above-described main body lifting / lowering position detection unit.

[0017] The treatment unit 5 is provided with a treatment element width drive unit that is driven when moving the left and right treatment elements 8A and 8B provided on the treatment unit main body 6 in the left-right direction (width direction). The treatment unit main body 6 is provided with a guide shaft that guides the left treatment element unit 7A having the left treatment element 8A and the right treatment element unit 7B having the right treatment element 8B so as to be movable in the left-right direction, and a screw shaft that is connected to a motor constituting the treatment element width drive unit via an appropriate speed reducer and is screwed into female screw parts provided on the left treatment element unit 7A and the right treatment element unit 7B to displace them toward the proximity side or the separation side may be provided. The treatment unit 5 may be provided with an appropriate detection unit that detects the left-right positions of the left treatment element unit 7A and the right treatment element unit 7B.

[0018] The treatment unit 5 is provided with a rubbing drive unit that is driven when the left and right treatment elements 8A and 8B are rubbed. The main body 6 of the treatment unit may be provided with an appropriate eccentric rotor, rubbing shaft, etc. that are connected to the motor constituting the rubbing drive unit via an appropriate speed reducer and displace the left and right treatment elements 8A and 8B in an arc shape. The treatment unit 5 is provided with a tapping drive unit that is driven when the left and right treatment elements 8A and 8B are tapped. The main body 6 of the treatment unit may be provided with an appropriate crank mechanism, eccentric rotor, tapping shaft, etc. that are connected to the motor constituting the tapping drive unit via an appropriate speed reducer and displace the left and right treatment elements 8A and 8B substantially vertically in the longitudinal direction of the guide rail. Instead of providing all of the main body advancing / retreating drive unit, treatment element width drive unit, rubbing drive unit, and tapping drive unit, at least one of these may not be provided. For example, without providing the rubbing drive unit, a rubbing operation may be possible by the treatment element width drive unit and the main body lifting / lowering drive unit, or an appropriate advancing / retreating mechanism that individually advances and retreats the left and right treatment elements 8A and 8B. As a treatment mechanism for treating the back of the subject to be treated, instead of or in addition to the treatment unit 5 as described above, it may be an air cell provided in the backrest part 2, and furthermore, a treatment mechanism for treating the back of the subject to be treated may not be provided. Regarding the basic configuration of the massage machine 1 as described above, various other known configurations can be adopted.

[0019] The leg rest part 10 is provided with a toe treatment part 11 for treating the toes of the subject to be treated in addition to the shin treatment part 13 for treating the shins of the subject to be treated. The toe treatment part 11 is provided with a left toe receiving groove 12A for receiving the left toe and a right toe receiving groove 12B for receiving the right toe. The shin treatment part 13 is provided with a left shin receiving groove 14A for receiving the left shin and a right shin receiving groove 14B for receiving the right shin. The left toe receiving groove 12A and the left shin receiving groove 14A are provided so as to be continuous, and the right toe receiving groove 12B and the right shin receiving groove 14B are provided so as to be continuous. This footrest part 10 may be tiltable by a footrest drive part. This footrest part 10 may be rotatable with respect to the seat part 3 with the upper end part on the seat part 3 side as a fulcrum. As the footrest drive part, an electric actuator having a rod connected to the footrest part 10 and telescoped by an appropriate motor may be used.

[0020] The massage machine 1 may be provided with a footrest position detection part constituted by an appropriate inclination angle detection part or the like for detecting the inclination angle of the footrest part 10 in order to control the footrest drive part, and appropriate stop means for stopping the footrest drive part at the tilt upper limit and the tilt lower limit. The footrest part 10 may be telescopic or vertically movable along the longitudinal direction of the subject's leg by the footrest drive part, and at least the part on the side facing the sole may be displaceable along the longitudinal direction of the leg. In this case, a footrest position detection part constituted by an appropriate lifting position detection part or the like for detecting the lifting position of the part on the side facing the sole of the footrest part 10 in order to control the footrest drive part, and appropriate stop means for stopping the footrest drive part at the lifting upper limit and the lifting lower limit may be provided. The toe treatment part 11 may be provided with an appropriate treatment mechanism such as an air cell or a roller for treating the left and right toes received in the left toe receiving groove 12A and the right toe receiving groove 12B.

[0021] As shown in FIGS. 6(a) to 6(d), air cells 34 and 39 that expand and contract by introduction and discharge of air are provided on the first side wall part 33 and the second side wall part 38 of the shin treatment part 13 (see also FIGS. 4 and 5). With such a configuration, the treatment part 9 can be treated by expanding and contracting the air cells 34 and 39 on both side wall parts 33 and 38. Further, the holding property can be improved by expanding the air cells 34 and 39 on both side wall parts 33 and 38 when holding the treatment part 9 so as to sandwich it from both sides. As shown in FIGS. 4 and 5, the pressing portion 29 of the shin treatment portion 13 is configured to be displaced in a direction generally opposite to that of the first side wall portion 33 that is swung by the first swing mechanism (30) (see also FIGS. 6(a) to (d)). With such a configuration, when the treatment portion 9 is drawn inward by the first side wall portion 33, the pressing portion 29 can press the treatment portion 9 on the side opposite to the drawing-in side, and the stimulation of the treatment portion 9 by the pressing portion 29 can be made to act more effectively. The massager 1 is provided with an interlocking mechanism (27) that displaces the pressing portion 29 in conjunction with the first side wall portion 33 that is swung by the first swing mechanism (30). With such a configuration, there is no need to separately provide a drive source for swinging the first side wall portion 33 and a drive source for displacing the pressing portion 29, nor is there a need to separately control them, and the configuration can be simplified.

[0022] The massager 1 is provided with a second swing mechanism (35) that swings the other second side wall portion 38 of the side wall portions 33 and 38 on both sides along the circumferential direction of the treatment portion 9. With such a configuration, both the first side wall portion 33 and the second side wall portion 38 can be swung along the circumferential direction of the treatment portion 9 while the treatment portion 9 is sandwiched from both sides by the side wall portions 33 and 38 on both sides, and the treatment portion 9 can be treated more effectively. The pressing portion 29 is configured to be displaced in a direction generally opposite to that of the second side wall portion 38 that is swung by the second swing mechanism (35). With such a configuration, when the treatment portion 9 is drawn inward by the second side wall portion 38, the pressing portion 29 can press the treatment portion 9 on the side opposite to the drawing-in side, and the stimulation of the treatment portion 9 by the pressing portion 29 can be made to act more effectively. That is, in the present embodiment, the pressing portion 29 is configured to be displaced in a direction generally opposite to that of the first side wall portion 33 and the second side wall portion 38. With such a configuration, the treatment portion 9 can be effectively drawn inward by the side wall portions 33 and 38 on both sides, and when drawing in like this, the pressing portion 29 can press the treatment portion 9 on the side opposite to the drawing-in side, so that the stimulation of the treatment portion 9 by the pressing portion 29 can be made to act more effectively.

[0023] As shown in FIGS. 2(a) and 2(b), the massager 1 includes a shared drive unit 18 that swings the first swing mechanisms (30) of the left tibia treatment unit 13A and the right tibia treatment unit 13B. With such a configuration, compared to a configuration in which drive units for swinging the first side wall portions 33, 33 of the left tibia treatment unit 13A and the right tibia treatment unit 13B for treating the left and right tibias are provided individually, simplification of the configuration and control can be achieved. Specifically, the left tibia treatment unit 13A and the right tibia treatment unit 13B have the same configuration as each other and are symmetric about the left and right. The drive unit 18 is composed of a motor or the like, and as shown in FIG. 3(b), rotates drive shafts 21, 21 that swing the first swing mechanisms (30) of the left tibia treatment unit 13A and the right tibia treatment unit 13B. Such a drive unit 18 may be a two-axis servo motor or the like that can rotate forward and backward and whose rotation speed can be controlled. The drive unit 18 and the drive shafts 21, 21 are connected via an appropriate transmission mechanism. Such a transmission mechanism may include a left worm 19A and a right worm 19B provided on each shaft of the drive unit 18, and appropriate worm wheels or the like that mesh with them, and reduction gears 20, 20 or the like connected to the drive shafts 21, 21, and may have various other configurations.

[0024] Instead of the mode in which the shared drive unit 18 that swings the first swing mechanism (30) of the left tibia treatment unit 13A and the first swing mechanism (30) of the right tibia treatment unit 13B is provided as described above, a configuration may be adopted in which a drive unit that swings the first swing mechanism (30) of the left tibia treatment unit 13A and a drive unit that swings the first swing mechanism (30) of the right tibia treatment unit 13B are provided individually. With such a configuration, it is also possible to perform treatment in different modes on the left tibia treatment unit 13A and the right tibia treatment unit 13B. In the following, for the same configurations in the left tibia treatment unit 13A and the right tibia treatment unit 13B, one of them will be taken as an example and described as the tibia treatment unit 13. Also, in the illustrated example, an example is shown in which the side wall portion arranged inside the tibia among the side wall portions 33, 38 on both sides is taken as the first side wall portion 33, and the side wall portion arranged outside the tibia is taken as the second side wall portion 38, but a configuration in which these are provided in reverse may also be adopted.

[0025] As shown in FIGS. 3 and 4, the first swing mechanism (30) is provided with a cam receiving portion 31 that rotatably receives a first eccentric cam 22 rotated by a drive shaft 21, and a guide portion (inner guide portion) 24 guides the first side wall portion 33 to swing along the circumferential direction of the treatment target portion 9 as the first eccentric cam 22 rotates. The first swing mechanism (30) includes a first link member 30. With such a configuration, if the first eccentric cam 22 is rotated by the drive shaft 21, the first side wall portion 33 can be guided by the inner guide portion 24 to swing in the circumferential direction of the treatment target portion 9. Thereby, for example, compared with a configuration in which a rack is provided on the outer peripheral side of the first side wall portion and a pinion meshing with the rack is further provided outside the rack to displace the first side wall portion in the circumferential direction, space can be saved on the outer peripheral side of the first side wall portion 33.

[0026] The second swing mechanism (35) is provided with a cam receiving portion 36 that rotatably receives a second eccentric cam 23 rotated by the drive shaft 21, and a guide portion (outer guide portion) 25 guides the second side wall portion 38 to swing along the circumferential direction of the treatment target portion 9 as the second eccentric cam 23 rotates. The second swing mechanism (35) includes a second link member 35. With such a configuration, if the first eccentric cam 22 and the second eccentric cam 23 are rotated by the drive shaft 21, the first side wall portion 33 and the second side wall portion 38 can be guided by the respective guide portions 24 and 25 to swing in the circumferential direction of the treatment target portion 9. Thereby, the drive source for swinging the first swing mechanism (30) and the drive source for swinging the second swing mechanism (35) can be shared, and the configuration and control can be simplified compared with a configuration in which these are provided individually.

[0027] The linkage mechanism (27) is connected via a connecting portion 26 so as to be rotatable relative to the first link member 30, and includes a pressing link member 27 guided by a guide portion (drive shaft 21) such that the pressing portion 29 is displaced along with the swinging of the first link member 30. With such a configuration, the connecting portion 26 is displaced in conjunction with the swinging of the first link member 30 that swings the first side wall portion 33, so that the pressing link member 27 is guided by the drive shaft 21 and displaced, and can be swung so as to cause the pressing portion 29 to protrude and retract from the back side. Thereby, since the pressing portion 29 can be swung substantially linearly, for example, compared with a configuration in which a protrusion of a rotating body rotating around a drive shaft is provided as the pressing portion, the treatment target portion 9 can be effectively stimulated from the back side. Further, in the present embodiment, the guide portion for guiding the pressing link member 27 is the drive shaft 21. That is, the drive shaft 21 that swings the first link member 30 also functions as a guide portion for guiding the pressing link member 27. With such a configuration, the configuration can be simplified compared with a configuration in which a guide portion for the pressing link member 27 is provided separately.

[0028] More specifically, as shown in FIG. 2(a), the shin treatment portion 13 includes a case 15 that houses each mechanism portion. This case 15 is fixed to an appropriate fixing portion provided on the leg mounting portion 10 of the massager 1. In this case 15, groove portions that constitute the left shin receiving groove 14A and the right shin receiving groove 14B penetrate in the longitudinal direction of the treatment target portion 9 and are provided so as to open forward. This case 15 is covered with an appropriate sheet-like cover or the like provided on the massager 1. In FIGS. 2(b), 3, 4, and 5, the illustration of this case 15 is omitted. Further, in FIG. 3(a), the illustration of the air cells 34, 39 is omitted, and in FIG. 3(b), the illustration of the side wall portions 33, 38 on both sides is omitted. As shown in Fig. 2(b), the tibia treatment unit 13 includes a first base portion 16 disposed on the upper side (knee side) which is one side in the longitudinal direction of the treatment target portion 9, and a second base portion 17 disposed on the lower side (toe side) which is the other side in the longitudinal direction. These first base portion 16 and second base portion 17 are plate-shaped and arranged such that the thickness direction is the longitudinal direction of the treatment target portion 9. These first base portion 16 and second base portion 17 are fixed to the case 15. Recesses are formed in these first base portion 16 and second base portion 17 so as to open forward to form groove portions constituting the left tibia receiving groove 14A and the right tibia receiving groove 14B.

[0029] The drive unit 18 is provided on the second base portion 17 side. In the illustrated example, the drive unit 18 is installed at the central portion in the left-right direction on the upper surface side of the second base portion 17 on the first base portion 16 side. The drive shaft 21 is provided so as to extend in the longitudinal direction of the treatment target portion 9. As shown in Fig. 3(b), the end portion on the second base portion 17 side of this drive shaft 21 is connected to the speed reducer 20 and rotated by the drive unit 18. The end portion on the first base portion 16 side of this drive shaft 21 is rotatably held by an appropriate bearing portion provided on the first base portion 16. As shown in Fig. 4, the drive shafts 21, 21 of the left tibia treatment unit 13A and the right tibia treatment unit 13B are provided so as to be respectively positioned at substantially the central portions in the groove width direction on the groove bottom side of the groove portions constituting the left tibia receiving groove 14A and the right tibia receiving groove 14B.

[0030] As shown in Fig. 3(b) and Fig. 4, the first eccentric cam 22 and the second eccentric cam 23 are columnar or disk-shaped with the axial direction being the axial direction of the drive shaft 21, and are circular when viewed in the axial direction. In the illustrated example, an example in which the first eccentric cam 22 and the second eccentric cam 23 have substantially the same diameter is shown. These first eccentric cams 22 and second eccentric cams 23 are fixed to the drive shaft 21 so as to be at positions offset from their respective centers. In the illustrated example, an example is shown in which the dimensions from the respective centers of the first eccentric cam 22 and the second eccentric cam 23 to the drive shaft 21 serving as the eccentric shaft are the same as each other. Further, the first eccentric cam 22 and the second eccentric cam 23 are provided so as to be offset from each other in the circumferential direction. That is, the maximum diameter portions of the first eccentric cam 22 and the second eccentric cam 23 are provided so as to be offset from each other in the circumferential direction when viewed in the axial direction. In the illustrated example, an example is shown in which the first eccentric cam 22 and the second eccentric cam 23 are provided such that their maximum diameter portions are offset from each other by 60 degrees in the circumferential direction, but they can be appropriately deformed so that the first link member 30 and the second link member 35 described later swing along a desired swing locus.

[0031] These first eccentric cams 22 and second eccentric cams 23 are fixedly provided with respect to the drive shaft 21 so as to be at positions spaced apart from each other in the axial direction of the drive shaft 21. In the illustrated example, an example is shown in which two first eccentric cams 22, 22 and two second eccentric cams 23, 23 are provided on the drive shaft 21. Further, second eccentric cams 23, 23 are provided in the vicinity of both axial ends of the drive shaft 21, and first eccentric cams 22, 22 are provided adjacent to the axial center sides of the second eccentric cams 23, 23 on both axial sides. The positions and numbers of these first eccentric cams 22, 22 and second eccentric cams 23, 23 can be appropriately deformed according to the positions and numbers of the first link member 30 and the second link member 35 described later.

[0032] As shown in FIG. 3(b), the inner guide portion 24 is formed in an axial shape extending in the longitudinal direction of the treatment target portion 9. The inner guide portion 24 is provided in parallel with the drive shaft 21. The end portion of the inner guide portion 24 on the side of the first base portion 16 is fixed to the first base portion 16. The end portion of the inner guide portion 24 on the side of the second base portion 17 is fixed to the second base portion 17. That is, the inner guide portion 24 is provided so as to span between the first base portion 16 and the second base portion 17. As shown in FIG. 4, each of the inner guide portions 24, 24 of the left and right tibia treatment portions 13A and 13B is provided so as to be located at each of the mutually adjacent side portions on one side in the groove width direction of each groove portion constituting the left and right tibia receiving grooves 14A and 14B (the side facing the inside of the tibia).

[0033] As shown in FIG. 3(b), the outer guide portion 25 is formed in an axial shape extending in the longitudinal direction of the treatment portion 9. The outer guide portion 25 is provided in parallel with the drive shaft 21. The end portion of the outer guide portion 25 on the side of the first base portion 16 is fixed to the first base portion 16. The end portion of the outer guide portion 25 on the side of the second base portion 17 is fixed to the second base portion 17. That is, the outer guide portion 25 is provided so as to be bridged between the first base portion 16 and the second base portion 17. As shown in FIG. 4, each of the outer guide portions 25, 25 of the left and right tibia treatment portions 13A and 13B is provided so as to be located at each of the mutually remote side portions on the other side in the groove width direction of each groove portion constituting the left and right tibia receiving grooves 14A and 14B (the side facing the outside of the tibia).

[0034] The inner guide portion 24 and the outer guide portion 25 are provided so as to be located on the front side of the drive shaft 21 (the opening side of the left and right tibia receiving grooves 14A and 14B). In the illustrated example, an example is shown in which the inner guide portion 24 is provided slightly on the front side of the outer guide portion 25. The dimension from the drive shaft 21 to the inner guide portion 24 and the dimension from the drive shaft 21 to the outer guide portion 25 are substantially the same. In the illustrated example, an example is shown in which the dimension from the drive shaft 21 to the inner guide portion 24 is slightly smaller than the dimension from the drive shaft 21 to the outer guide portion 25.

[0035] The first link member 30 is provided so as to extend from the groove bottom side of the groove portion constituting the tibia receiving groove (left and right tibia receiving grooves 14A and 14B) to one side in the groove width direction of the groove portion. In the illustrated example, the first link member 30 is generally L-shaped (boomerang-shaped) when viewed in the axial direction of the drive shaft 21 and is formed in a substantially plate shape whose thickness direction is the same as the axial direction of the drive shaft 21, but is not limited to such a shape. The cam receiving portion 31 is provided at the groove bottom side portion of the groove portion that constitutes the shin receiving groove in the first link member 30. An appropriate rolling bearing or the like may be provided between the inner peripheral surface of the cam receiving portion 31 and the outer peripheral surface of the first eccentric cam 22. The first link member 30 is provided with a guided portion 32 that is guided by the inner guide portion 24. This guided portion 32 is provided at one side portion in the groove width direction of the groove portion that constitutes the shin receiving groove in the first link member 30. That is, the cam receiving portion 31 is provided at the groove bottom side piece portion that is one piece portion of the first link member 30 having a generally L shape, and the guided portion 32 is provided at the one side piece portion in the groove width direction that is the other piece portion.

[0036] In the present embodiment, the guided portion 32 is formed in a long hole shape that extends in the circumferential direction of the treatment target portion 9, and is configured such that the shaft-shaped inner guide portion 24 is inserted therethrough. That is, the guided portion 32 is formed in a concave curved shape (arc shape) that is concave toward the shin receiving groove so that the first side wall portion 33 swings generally along the circumferential direction of the treatment target portion 9. The guided portion 32 and the inner guide portion 24 of the first link member 30 are not limited to such an example. For example, a configuration may be adopted in which a guide groove for guiding a protrusion or a shaft portion provided on the first link member 30 side is provided on the case 15 side such as the first base portion 16 or the second base portion 17. Further, the guided portion 32 and the inner guide portion 24 are not limited to a mode composed of a long hole or a guide groove and a protrusion or a shaft portion inserted therein, and may be a guide surface or the like that contacts so as to rub against each other, and may have various other configurations.

[0037] The first side wall portion 33 is provided on the shin receiving groove side of the guided portion 32 of the first link member 30. The first side wall portion 33 may be fixed in an appropriate manner to one side piece portion in the groove width direction of the first link member 30. In the illustrated example, the first side wall portion 33 is fixed to one side piece portions in the groove width direction of the two first link members 30, 30 provided at intervals in the axial direction corresponding to the two first eccentric cams 22, 22 described above (see FIGS. 3(a) and (b)). This first side wall portion 33 is in the shape of a plate whose thickness direction is generally the left - right direction of the subject. In the illustrated example, an example is shown in which the surface of the first side wall portion 33 on the shin - receiving groove side is made substantially flat, but it may be formed in a concave - curved surface shape or the like along the circumferential direction of the treatment part 9. As shown in FIGS. 2(b) and 4, an air cell 34 is provided in this first side wall portion 33. The air cell 34 is provided along the surface of the first side wall portion 33 on the shin - receiving groove side. In the illustrated example, an example is shown in which the front end portion of the air cell 34 protrudes more than the front end portion of the first side wall portion 33. This air cell 34 may be configured such that the expansion dimension on the front end side is larger than the expansion dimension along the groove width direction of the shin - receiving groove on the rear end side (the groove bottom side of the shin - receiving groove). As shown in FIGS. 2(b) and 3(a), the first side wall portion 33 is provided with a through - hole through which the connecting portion of the air cell 34 is inserted. An air source such as an air pump is connected to this connecting portion via an air pipeline. At an appropriate position of the air pipeline, an air cell air supply and exhaust portion such as a solenoid valve for controlling the supply and discharge of air to the air cell 34 is provided.

[0038] The first side wall portion 33 (and the air cell 34) configured as described above is displaced along the circumferential direction of the treatment part 9 by the driving unit 18 rotating the drive shaft 21, causing the first link member 30 to swing. That is, as shown in FIGS. 4 and 5, when the drive shaft 21 is rotated, one side piece in the groove width direction of the first link member 30 is guided and regulated by the inner guide portion 24 inserted into the guided portion 32 and is displaced along the long hole of the guided portion 32 with the rotation of the first eccentric cam 22. In FIG. 4(a), an example of the forward position where the maximum - diameter portion of the first eccentric cam 22 faces one side in the groove width direction of the shin - receiving groove (hereinafter, may be abbreviated as one side in the groove width direction) and one side piece in the groove width direction of the first link member 30 is pushed forward is illustrated. In the illustrated example, a state where the maximum - diameter portion of the first eccentric cam 22 faces one side in the groove width direction which is the diagonally forward side is illustrated. In FIG. 4(b), from the state of FIG. 4(a), the maximum diameter portion of the first eccentric cam 22 rotates approximately 110 degrees so as to face the other side in the groove width direction (hereinafter sometimes abbreviated as the other side in the groove width direction) in the groove width direction of the shin receiving groove, and one side piece in the groove width direction of the first link member 30 is drawn backward, and the groove opening side of the shin receiving groove is displaced so as to expand. The example shows a state of displacement. In the illustrated example, the state where the maximum diameter portion of the first eccentric cam 22 faces the other side in the groove width direction which is the diagonally forward side is illustrated.

[0039] In FIG. 5(a), from the state of FIG. 4(b), the maximum diameter portion of the first eccentric cam 22 rotates approximately 70 degrees so as to face the other side in the groove width direction which is the diagonally backward side, and one side piece in the groove width direction of the first link member 30 is further drawn backward, and the groove opening side of the shin receiving groove is displaced so as to further expand. The example shows a rear position after displacement. In FIG. 5(b), from the state of FIG. 5(a), the maximum diameter portion of the first eccentric cam 22 rotates approximately 70 degrees so as to face the rear side, and one side piece in the groove width direction of the first link member 30 is slightly pushed forward, and the groove opening side of the shin receiving groove is displaced so as to contract. The example shows a state of displacement. From this state, as shown in FIG. 4(a), if the maximum diameter portion of the first eccentric cam 22 rotates approximately 110 degrees so as to face one side in the groove width direction, one side piece in the groove width direction of the first link member 30 is further pushed forward, and the groove opening side of the shin receiving groove is displaced so as to further contract, and the above-described front position is reached. In the above example, an example where the first eccentric cam 22 of the left shin treatment portion 13A is rotated counterclockwise (the first eccentric cam 22 of the right shin treatment portion 13B is rotated clockwise) is shown, but it may be rotated in the opposite direction.

[0040] As shown in FIGS. 4 and 5, the pressing link member 27 is configured to be displaced so that the pressing portion 29 projects and retracts from the groove bottom side of the shin receiving groove toward the opening side (front side). The pressing link member 27 includes a pressing side piece portion provided with the pressing portion 29 and a connecting side piece portion connected to the connecting portion 26. As shown in FIG. 5(a), the pressing side piece portion is arranged such that when the pressing portion 29 is in the forward position, it extends from the groove bottom side of the shin receiving groove toward the diagonally forward side which is the other side in the groove width direction. The connecting side piece portion is arranged such that when the pressing portion 29 is in the forward position, it extends from the base end portion of the pressing side piece portion generally toward one side in the groove width direction. In the illustrated example, the pressing link member 27 is generally L-shaped (boomerang-shaped) when viewed in the axial direction of the drive shaft 21 and is a substantially plate-shaped member whose thickness direction is the same as the axial direction of the drive shaft 21, but it is not limited to such a shape. As shown in FIG. 3(b), the connecting portion 26 has a shaft shape parallel to the drive shaft 21. The connecting portion 26 is provided so as to be bridged between two first link members 30, 30 provided at intervals in the axial direction of the drive shaft 21. In the illustrated example, the connecting portion 26 is connected to a portion near the corner of the substantially L-shaped first link members 30, 30. The connecting portion 26 may be rotatably connected to one or both of the first link members 30, 30 and the pressing link member 27.

[0041] The pressing link member 27 is provided with a guided portion 28 guided by the drive shaft 21 that constitutes the guide portion. The guided portion 28 is provided on the pressing side piece portion. In this embodiment, the guided portion 28 is formed in a long hole shape through which the drive shaft 21 is inserted. The guided portion 28 is provided so as to extend along the pressing side piece portion from the corner portion of the pressing link member 27 having a substantially L shape. The guided portion 28 may have an appropriate shape such that the pressing portion 29 is displaced substantially in the front-rear direction along with the displacement of the first link member 30 that is displaced as described above. In the illustrated example, an example is shown in which the guided portion 28 is formed in a linear groove shape extending in the longitudinal direction of the pressing side piece portion, but the example is not limited thereto. Further, the guided portion 28 of the pressing link member 27 and the guide portion for guiding the same are not limited to the above example. For example, a configuration in which a guide groove for guiding a protrusion or a shaft portion provided on the pressing link member 27 side is provided on the case 15 side such as the first base portion 16 or the second base portion 17 may be employed. Further, the guided portion 28 and the guide portion are not limited to a mode including a long hole or a guide groove and a protrusion or a shaft portion inserted therein, and may be a guide surface that contacts so as to rub against each other, or may have various other configurations.

[0042] The pressing portion 29 is provided at the tip of the pressing side piece portion of the pressing link member 27 so as to be displaced substantially in the front-rear direction at substantially the center in the groove width direction of the shin receiving groove. In the illustrated example, the pressing portion 29 is configured to be displaced along a substantially circular arc protruding toward the other side (the second side wall portion 38 side) in the groove width direction, but the example is not limited thereto. Further, in the illustrated example, the pressing portion 29 is formed in a protruding shape fixedly provided on one side portion of the tip of the pressing side piece portion. The pressing portion 29 is not limited to such an example, and may be provided with unevenness on the surface for enhancing the finger pressure effect, or may be in a roller shape rotatable around an axis parallel to the drive shaft 21. When the drive shaft 21 is rotated by the drive unit 18 with the pressing link member 27 configured as described above, the pressing side piece portion thereof is guided and restricted by the drive shaft 21 inserted through the guided portion 28 and is displaced along the long hole of the guided portion 28 while relatively rotating with respect to the first link member 30 around the connecting portion 26 along with the swinging of the first link member 30. As a result, the pressing portion 29 is displaced substantially in the front-rear direction.

[0043] When the first side wall portion 33 shown in Fig. 4(a) is in the forward position, the pressing portion 29 is in the rearward position. In this rearward position, the pressing portion 29 may be in a position where it is immersed without substantially protruding from the groove bottom of the shin receiving groove. That is, in the rearward position, the pressing portion 29 may be configured to be non-contact with the treatment portion 9 received in the shin receiving groove. In a state where the first link member 30 is displaced so as to push out the first side wall portion 33 to the forward position, the connecting portion 26 and the drive shaft 21 are in a separated state. As a result, the pressing side piece portion of the pressing link member 27 is pulled along the guided portion 28, and the pressing portion 29 is in the rearward position. In Fig. 4(b), as the first side wall portion 33 is displaced to the rear side from the state of Fig. 4(a), the connecting portion 26 is displaced toward the drive shaft 21 side. As a result, the pressing side piece portion of the pressing link member 27 is displaced along the guided portion 28 to the side that protrudes the pressing portion 29. In this state, the pressing portion 29 is in an intermediate position protruding from the groove bottom of the shin receiving groove.

[0044] When the first side wall portion 33 shown in Fig. 5(a) is in the rearward position, the pressing portion 29 is in the forward position. In a state where the first link member 30 is displaced so as to pull in the first side wall portion 33 to the rearward position, the connecting portion 26 and the drive shaft 21 are in a close proximity state. As a result, the pressing side piece portion of the pressing link member 27 is pushed out along the guided portion 28, and the pressing portion 29 is in the forward position. In Fig. 5(b), as the first side wall portion 33 is displaced to the forward side from the state of Fig. 5(a), the connecting portion 26 is displaced in a direction away from the drive shaft 21. As a result, the pressing side piece portion of the pressing link member 27 is displaced along the guided portion 28 to the side that immerses the pressing portion 29. In this state, the pressing portion 29 is in an intermediate position protruding from the groove bottom of the shin receiving groove. This intermediate position of the pressing portion 29 shows an example on one side in the groove width direction from the intermediate position of the pressing portion 29 shown in Fig. 4(b), but is not limited to such an example.

[0045] As described above, the pressing portion 29 and the first side wall portion 33 are displaced in generally opposite directions. That is, when the first side wall portion 33 at the front position is displaced rearward, the pressing portion 29 is displaced forward from the rear position, and when the first side wall portion 33 at the rear position is displaced forward, the pressing portion 29 is displaced rearward from the front position. In the illustrated example, the pressing portion 29 is provided only at one location in the middle portion in the axial direction of the drive shaft 21. However, it may be provided at a plurality of locations at intervals in the axial direction of the drive shaft 21, or may be provided at a plurality of locations in the circumferential direction of the treatment target portion 9.

[0046] The second link member 35 is provided so as to extend from the groove bottom side of the groove portion constituting the shin receiving groove to the other side in the groove width direction of the groove portion. In the illustrated example, the second link member 35 is generally L-shaped (boomerang-shaped) when viewed in the axial direction of the drive shaft 21 and is formed in a substantially plate shape with the thickness direction being the same as the axial direction of the drive shaft 21, but is not limited to such a shape. The cam receiving portion 36 is provided at the groove bottom side portion of the groove portion constituting the shin receiving groove in the second link member 35. An appropriate rolling bearing or the like may be provided between the inner peripheral surface of the cam receiving portion 36 and the outer peripheral surface of the second eccentric cam 23. The second link member 35 is provided with a guided portion 37 guided by the outer guide portion 25. The guided portion 37 is provided at the other side portion in the groove width direction of the groove portion constituting the shin receiving groove in the second link member 35. That is, the cam receiving portion 36 is provided at the groove bottom side piece portion which is one piece portion of the generally L-shaped second link member 35, and the guided portion 37 is provided at the other piece portion which is the other side piece portion in the groove width direction.

[0047] In this embodiment, the guided portion 37 is formed in a long hole shape extending in the circumferential direction of the treatment target portion 9, and is configured such that the shaft-shaped outer guide portion 25 is inserted therethrough. That is, the guided portion 37 is formed in a concave curved shape (arc shape) that is concave toward the tibia receiving groove side so that the second side wall portion 38 swings substantially along the circumferential direction of the treatment target portion 9. The guided portion 37 and the outer guide portion 25 of the second link member 35 are not limited to such an example. For example, a configuration may be adopted in which a guide groove for guiding a protrusion or a shaft portion provided on the second link member 35 side is provided on the case 15 side such as the first base portion 16 or the second base portion 17. Further, the guided portion 37 and the outer guide portion 25 are not limited to a mode constituted by a long hole or a guide groove and a protrusion or a shaft portion inserted therein, and may be a guide surface or the like that contacts so as to rub against each other, and may have various other configurations.

[0048] The second side wall portion 38 is provided on the tibia receiving groove side of the guided portion 37 of the second link member 35. The second side wall portion 38 may be fixed to the other side piece portion in the groove width direction of the second link member 35 in an appropriate manner. In the illustrated example, the second side wall portion 38 is fixed to the other side piece portions in the groove width direction of the two second link members 35, 35 provided at intervals in the axial direction corresponding to the two second eccentric cams 23, 23 described above (see FIGS. 3(a) and 3(b)). This second side wall portion 38 is formed in a plate shape whose thickness direction is substantially the left-right direction of the subject. In the illustrated example, an example is shown in which the surface on the tibia receiving groove side of the second side wall portion 38 is substantially flat, but it may be formed in a concave curved surface shape or the like along the circumferential direction of the treatment target portion 9. Further, in the illustrated example, an example is shown in which a plurality of ribs are provided on the side surface of the second side wall portion 38 on the side different from the tibia receiving groove side. As shown in FIGS. 2(b) and 4, an air cell 39 is provided on the second side wall portion 38. The air cell 39 is provided along the surface on the tibia receiving groove side of the second side wall portion 38. In the illustrated example, an example is shown in which the front end portion of the air cell 39 protrudes more than the front end portion of the second side wall portion 38. The air cell 39 may be configured such that the expansion dimension on the front end side is larger than the expansion dimension substantially along the groove width direction of the tibia receiving groove on the rear end side (the groove bottom side of the tibia receiving groove). As shown in FIGS. 2(b) and 3(a), the second side wall portion 38 is provided with a through hole through which the connection portion of the air cell 39 is inserted. An air source such as an air pump is connected to this connection portion via an air pipeline. At an appropriate position of the air pipeline, an air cell air supply and exhaust portion such as a solenoid valve for controlling the supply and discharge of air to the air cell 39 is provided.

[0049] The second side wall portion 38 (and the air cell 39) configured as described above is displaced along the circumferential direction of the treatment target portion 9 by the driving shaft 21 being rotated by the driving portion 18, causing the second link member 35 to swing. That is, as shown in FIGS. 4 and 5, when the driving shaft 21 is rotated, the other side piece in the groove width direction of the second link member 35 is guided and regulated by the outer guide portion 25 inserted into the guided portion 37 and is displaced along the long hole of the guided portion 37 with the rotation of the second eccentric cam 23. In the present embodiment, this second side wall portion 38 is configured to be displaced in the front-rear direction so as to be offset from the displacement of the first side wall portion 33 in the front-rear direction described above, and is in the front position in FIG. 4(b). FIG. 4(b) illustrates a front position where the maximum diameter portion of the second eccentric cam 23 faces the other side in the groove width direction and the other side piece in the groove width direction of the second link member 35 is pushed forward. The illustration shows a state where the maximum diameter portion of the second eccentric cam 23 faces the other side in the groove width direction which is obliquely rearward. In FIG. 5(a), from the state of FIG. 4(b), the maximum diameter portion of the second eccentric cam 23 rotates approximately 70 degrees so as to face the rear side, the other side piece in the groove width direction of the second link member 35 is pulled backward, and the groove opening side of the shin receiving groove is displaced so as to be expanded.

[0050] FIG. 5(b) illustrates a rear position where, from the state of FIG. 5(a), the maximum diameter portion of the second eccentric cam 23 rotates approximately 70 degrees so as to face one side in the groove width direction, the other side piece in the groove width direction of the second link member 35 is further pulled backward, and the groove opening side of the shin receiving groove is further displaced so as to be expanded. The illustration shows a state where the maximum diameter portion of the second eccentric cam 23 faces one side in the groove width direction which is obliquely rearward. In FIG. 4(a), an example is illustrated in which the maximum diameter portion of the second eccentric cam 23 is rotated approximately 110 degrees from the state of FIG. 5(b) so as to face the front side, and the other side piece portion of the second link member 35 in the groove width direction is pushed out to the front side, and the groove opening side of the shin receiving groove is displaced so as to be reduced. From this state, as shown in FIG. 4(b), if the maximum diameter portion of the second eccentric cam 23 is rotated approximately 110 degrees so as to face the other side in the groove width direction, the other side piece portion of the second link member 35 in the groove width direction is further pushed out to the front side, and the groove opening side of the shin receiving groove is further displaced so as to be reduced, and the above-described front position is obtained.

[0051] In the above example, an example in which the second eccentric cam 23 of the left shin treatment portion 13A is rotated counterclockwise (the second eccentric cam 23 of the right shin treatment portion 13B is rotated clockwise) is shown, but it may be rotated in the opposite direction. Further, instead of the mode in which the second side wall portion 38 and the first side wall portion 33 are displaced in the front-rear direction so as to be displaced from each other, it may be configured to be displaced in the front-rear direction in substantially the same manner. For example, the first eccentric cam 22 and the second eccentric cam 23 may be arranged such that their maximum diameter portions are displaced by 180 degrees in the circumferential direction. The displacement trajectories of the first side wall portion 33, the second side wall portion 38, and the pressing portion 29 may be appropriately set in consideration of the treatment feeling and the like. Further, the front positions and the rear positions of the pressing portion 29, the first side wall portion 33, and the second side wall portion 38 described above are not limited to the position on the most front side or the position on the most rear side, and may include cases where the positions are further forward or further rearward depending on the trajectories of the link members 27, 30, 35.

[0052] The mode of swinging the first side wall portion 33 and the second side wall portion 38 along the circumferential direction of the treatment portion 9 is not limited to the configuration including the link members 30, 35 that are swung by the eccentric cams 22, 23 that are rotated around the drive shaft 21 as described above. For example, a configuration in which pinions meshing with racks provided on the first side wall portion 33 and the second side wall portion 38 are provided, or a configuration in which appropriate drive sources such as cylinders or air cells for displacing the first side wall portion 33 and the second side wall portion 38 along guide grooves are provided, and other various configurations may be adopted. In addition, in the above example, an example is shown in which the pressing portion 29 is displaced in a mechanically interlocked manner with the first side wall portion 33. However, the present invention is not limited to such a mode. A configuration may be adopted in which the pressing portion 29 is displaced in a mechanically interlocked manner with the second side wall portion 38, or the first side wall portion 33, the second side wall portion 38, and the pressing portion 29 may be mechanically non-interlocked. In this case, a configuration may be adopted in which an appropriate drive source such as a motor, a cylinder, or an air cell for displacing the pressing portion 29 is provided. Further, in this case, the drive source of the pressing portion 29 may be controlled by an appropriate control unit so that the pressing portion 29 is interlocked with one or both of the first side wall portion 33 and the second side wall portion 38, or the pressing portion 29 may be displaced without being interlocked with the first side wall portion 33 or the second side wall portion 38.

[0053] Further, the massage device 1 may include a detection unit that detects the position of at least one of the pressing portion 29, the first side wall portion 33, and the second side wall portion 38. Further, the massage device 1 is provided with an appropriate power supply unit, a power cord, etc. that are connected to an external commercial power supply or the like and supply drive power to the above-described respective parts. Further, the massage device 1 is provided with an operation display unit, a control unit that is connected to each part via a signal line or the like and controls each part, and the like.

[0054] The massage device 1 may treat the treatment target part 9, for example, as shown in FIGS. 6(a) to 6(d). In FIGS. 6(a) to 6(d), an example is shown in which the first side wall portion 33 and the second side wall portion 38 are swung in the circumferential direction of the treatment target part 9 in a state where the air cells 34 and 39 of the first side wall portion 33 and the second side wall portion 38 of the gastrocnemius treatment part 13 are inflated. However, the present invention is not limited to such an example. For example, when swinging the first side wall portion 33 and the second side wall portion 38, the air cells 34 and 39 may be gradually inflated, gradually contracted, or alternately inflated, or may be inflated and contracted in various other modes.

[0055] As shown in FIGS. 6(a) to 6(c), the pressing portion 29 at the rear position is pushed forward while the first side wall portion 33 and the second side wall portion 38 at the front position are displaced rearward. With such a configuration, the tibia that constitutes the treatment part 9 can be pressed against the rear side by the first side wall portion 33 and the second side wall portion 38, and the back side of the tibia can be pressed by the pressing portion 29. So to speak, the first side wall portion 33 (air cell 34) and the second side wall portion 38 (air cell 39) function like the fingers other than the thumbs of both hands of a therapist such as a masseur, and the pressing portion 29 functions like a thumb, and a treatment feeling similar to that of manual treatment by a person can be imparted. Further, since the first side wall portions 33 and the second side wall portions 38 on both sides swing in the circumferential direction of the treatment part 9, compared with those that swing in the front-rear direction or the left-right direction, it is possible to perform a treatment that wraps the treatment part 9, and similar to the above, a treatment feeling similar to that of manual treatment by a person (both hands) can be imparted.

[0056] In the above example, an example in which the tibia treatment part 13 is provided in the chair-type massage machine 1 is shown, but it is not limited to such an example. The massage machine 1 may be a so-called foot massager that treats only the left and right legs, or may be one that treats only the tibia. Further, instead of the configuration including the left tibia treatment part 13A and the right tibia treatment part 13B that treat the left and right tibias, a configuration including only one of them may be used.

[0057] Next, a modified example of the massage machine will be described with reference to FIG. 6(e). The massage machine 1A according to this modified example includes a shoulder treatment part 13C that treats the vicinity of the shoulder that constitutes the treatment part 9A of the person to be treated. The shoulder treatment part 13C includes a left side wall part 33A that constitutes the first side wall part, a right side wall part 38A that constitutes the second side wall part, and pressing parts 29A, 29A that press both shoulders constituting the treatment part 9A from the back side. The left side wall part 33A and the right side wall part 38A partition both sides of the receiving recess 14C for receiving the person to be treated. The left side wall part 33A and the right side wall part 38A are each provided with air cells 34, 39, which are substantially the same as those described above. Also, the left side wall part 33A, the right side wall part 38A, and the pressing parts 29A, 29A on both sides are configured to be displaced in substantially opposite directions in the front-rear direction, which is substantially the same as that described above. According to this modification, with the left side wall part 33A and the right side wall part 38A pressing both shoulders toward the rear side, the pressing parts 29A, 29A on both sides can press both shoulders from the back side.

[0058] The massage machines 1, 1A are not limited to the configuration in which the calves and the vicinity of the shoulders as described above are the treatment parts 9, 9A. For example, the thighs (upper thighs), forearms, upper arms, etc. may be used, and the buttocks, waist, back, neck, etc. may also be used. According to such treatment parts, the positions and displacement modes of the first side wall part, the second side wall part, and the pressing part may be deformed. In each of the above examples, an example in which the first side wall part and the second side wall part and the pressing part are configured to be displaced in substantially opposite directions is shown. However, it is not limited to such an example. For example, a configuration in which the first side wall part and the second side wall part are displaced in substantially opposite directions may be used, and various other deformations are possible. In each of the above examples, an example in which air cells are provided on each of the first side wall part and the second side wall part is shown. However, air cells may be provided on only one of them, or a configuration in which appropriate pressing parts are provided instead of the air cells may be used. In each of the above examples, an example in which both the first side wall part and the second side wall part swing along the circumferential direction of the treatment part is shown. However, a configuration in which only one of them swings along the circumferential direction of the treatment part may be used. The configurations and treatment modes of the respective parts constituting the massage machines 1, 1A according to the present embodiment are not limited to the above examples, and various other deformations are possible.

Explanation of reference numerals

[0059] 1,1A Massage Machine 13A Left Shin Treatment Part 13B Right Shin Treatment Part 18 Driving Part 21 Driving Shaft (Guide Part) 22 First Eccentric Cam 23 Second Eccentric Cam 24 Inner Guide Part (Guide Part) 25 Outer Guide Part (Guide Part) 26 Connecting Part 27 Pressing Link Member (Interlocking Mechanism) 29 Pressing Part 30 First Link Member (First Rocking Mechanism) 31 Cam Receiving Part 33 First Side Wall Part (Side Wall Part) 33A Left Side Wall Part (First Side Wall Part, Side Wall Part) 34 Air Cell 35 Second Link Member (Second Rocking Mechanism) 36 Cam Receiving Part 38 Second Side Wall Part (Side Wall Part) 38A Right Side Wall Part (Second Side Wall Part, Side Wall Part) 39 Air Cell 9,9A Treated Part

Claims

1. Side wall portions on both sides that hold the treatment area from both sides, a first swing mechanism that swings one of the first side wall portions of these side wall portions on both sides along the circumferential direction of the treatment area, a drive shaft that swings the first swing mechanism, a pressing portion that presses the treatment area from the back side between the side wall portions on both sides, and an interlocking mechanism that displaces the pressing portion in conjunction with the first side wall portion swung by the first swing mechanism. The first swing mechanism includes a first eccentric cam rotated by the drive shaft, a cam receiving portion that rotatably receives the first eccentric cam, and a first link member provided with the first side wall portion, and a guide portion that guides a guided portion of the first link member so that the first side wall portion swings along the circumferential direction of the treatment area as the first eccentric cam rotates. The interlocking mechanism includes a pressing link member connected via a connecting portion so as to be relatively rotatable with respect to the first link member and provided with the pressing portion, and a guide portion that guides a guided portion of the pressing link member so that the pressing portion protrudes and retracts from the back side as the first link member swings. A massage machine characterized by comprising.

2. In Claim 1, The interlocking mechanism is configured to displace the pressing portion in a direction substantially opposite to that of the first side wall portion swung by the first swing mechanism. A massage machine characterized by this.

3. In Claim 1, A left shin treatment portion having the side wall portions on both sides, the first swing mechanism, the pressing portion, the drive shaft, and the interlocking mechanism arranged on both sides of the left shin constituting the treatment area, and the side wall portions on both sides, the first swing mechanism, the pressing portion, the drive shaft, and the interlocking mechanism arranged on both sides of the right shin constituting the treatment area. A massage machine characterized by comprising a right shin treatment portion.

4. In Claim 2, A left shin treatment portion having the side wall portions on both sides, the first swing mechanism, the pressing portion, the drive shaft, and the interlocking mechanism arranged on both sides of the left shin constituting the treatment area, and the side wall portions on both sides, the first swing mechanism, the pressing portion, the drive shaft, and the interlocking mechanism arranged on both sides of the right shin constituting the treatment area. A massage machine characterized by comprising a right shin treatment portion.

5. In Claim 1, The massage device is provided with a second swing mechanism for swinging the other second side wall portion of the side wall portions on both sides along the circumferential direction of the treatment portion. The second swing mechanism includes a second eccentric cam rotated by the drive shaft, a cam receiving portion for rotatably receiving the second eccentric cam, a second link member provided with the second side wall portion, and a guide portion for guiding a guided portion of the second link member so that the second side wall portion swings along the circumferential direction of the treatment portion as the second eccentric cam rotates. The massage device is characterized by this.

6. In Claim 2, The massage device is provided with a second swing mechanism for swinging the other second side wall portion of the side wall portions on both sides along the circumferential direction of the treatment portion. The second swing mechanism includes a second eccentric cam rotated by the drive shaft, a cam receiving portion for rotatably receiving the second eccentric cam, a second link member provided with the second side wall portion, and a guide portion for guiding a guided portion of the second link member so that the second side wall portion swings along the circumferential direction of the treatment portion as the second eccentric cam rotates. The massage device is characterized by this.

7. In any one of Claims 1 to 6, The massage device is characterized in that air cells that expand and contract by introduction and discharge of air are provided on the first side wall portion and the other second side wall portion of the side wall portions on both sides.

8. In Claim 3 or 4, The massage device is characterized by including a shared drive portion for swinging the first swing mechanism of the left tibia treatment portion and the first swing mechanism of the right tibia treatment portion.

Images