Massage equipment

Abstract

To provide a massage device that does not become boring easily by enhancing satisfaction acquired by a massage.SOLUTION: A massage device includes a head case 1 having a front case 20, a movable massage body 5 provided protruding ahead from the front case 20 and supported swingably around a swing shaft 17 provided in the front case 20, and a driving structure 7 provided inside the head case 1 for oscillating the movable massage body 5. Thereby, a massage stimulus by the oscillation of the movable massage body 5, more specifically, a stimulus by the oscillation of the movable massage body 5 on a human body surface is given to the body surface or the deep part. As compared to a conventional massage device, the massage stimulus can be applied to the human body in a clearer manner, and a feeling of satisfaction obtained by the massage can be enhanced.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a massage device that applies massage stimulation to a human body surface such as the scalp. [Background technology]

[0002] This type of massage device is disclosed in, for example, Patent Document 1. In the massage device of Patent Document 1, a treatment head is attached to the opening surface of a hollow main body housing, and four treatment pieces provided on the treatment head are rotated by motor power. When using the massage device, each treatment piece, which is rotated by motor power, is pressed against a human body surface such as the scalp to give a massage stimulus. Each treatment piece has a treatment piece base and four treatment protrusions protruding from the base, and the rotation center position of the treatment piece is eccentric from the center of the treatment piece base. Therefore, it is possible to give a rotational stimulus when the treatment pieces are rotated, a pinch kneading stimulus when adjacent treatment pieces on the left and right approach each other, and a twisting stimulus when adjacent treatment pieces on the top and bottom pass each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-61181 A Summary of the Invention [Problem to be solved by the invention]

[0004] As described above, according to the massage device of Patent Document 1, the massagers are pressed against the surface of the human body while being driven to rotate, so that the massagers can apply rotational stimulation, pinch kneading stimulation, twisting stimulation, etc. However, in the massage device of Patent Document 1, since multiple massagers apply massage stimulation to the surface of the human body, massage stimulation can be applied to a wide range of the surface of the human body at once, but the various massage stimulations only act on the surface of the human body, and even if the massagers are pressed strongly against the human body, the pressing force is distributed among the multiple massagers, so that it is difficult to obtain a massage effect, and a high level of satisfaction cannot be obtained.

[0005] An object of the present invention is to provide a massage device that enhances the sense of satisfaction obtained from a massage and prevents the user from becoming bored. [Means for solving the problem]

[0006] The massage device of the present invention is characterized by comprising a head case 1 having a front case 20, a movable massage body 5 protruding forward from the front case 20 and supported so as to be swingable around an oscillating axis 17 provided on the front case 20, and a drive structure 7 provided inside the head case 1 for swinging the movable massage body 5.

[0007] The movable massage body 5 is adapted to be oscillated back and forth between a first posture in which its front end is located on the rear side and a second posture in which its front end is located on the front side. When a direction perpendicular to the oscillation axis 17 and parallel to the casing central axis P of the head case 1, which is the front-rear direction, is defined as the X direction, and a direction perpendicular to the oscillation axis 17 and perpendicular to the casing central axis P is defined as the Y direction, the reciprocating oscillation motion of the front end of the movable massage body 5 between the first posture and the second posture includes an X component, which is a motion in the X direction, and a Y component, which is a motion in the Y direction.

[0008] A configuration can be adopted in which the movement width of the Y component of the front end of the movable massage body 5 during the reciprocating oscillation movement is set to be larger than the movement width of the X component.

[0009] A configuration can be adopted in which the movement width of the X component of the front end of the movable massage body 5 during the reciprocating oscillation movement is set to be larger than the movement width of the Y component.

[0010] The drive structure 7 includes a drive pin 72 that applies a pressing force to the movable massage body 5 to oscillate the movable massage body 5. When the Y direction is defined as the direction approaching the casing central axis P of the head case 1 as the inward direction and the direction away from the casing central axis P as the outward direction, the front end of the movable massage body 5 is configured to move from the outward direction to the inward direction upon receiving the pressing force from the drive pin 72.

[0011] The driving pin 72 is configured to move forward and backward in the X direction, which is the front-rear direction, and the movable massage body 5 is provided with a passive arm 15 that receives the pressing force of the driving pin 72 in the forward direction.

[0012] An operating pin 102 is provided which connects the driving pin 72 and the passive arm 15, and the passive arm 15 is configured to move in the front-rear direction together with the forward and backward movement of the driving pin 72.

[0013] The head case 1 includes a cover case 21 and a front case 20 that is detachably attached to the front of the cover case 21. A drive structure 7 is assembled inside the cover case 21, and a passive arm 15 of a movable massage body 5 is assembled to the front case 20. When the front case 20 is attached to the cover case 21, the passive arm 15 of the movable massage body 5 and the drive pin 72 are configured to be adjacent to each other in the front-rear direction.

[0014] The drive structure 7 includes a rotary drive source 50 and a motion conversion mechanism that converts the rotary motion of the rotary drive source 50 into a reciprocating motion. The motion conversion mechanism is composed of a cam mechanism including a cam drive member 60 that is rotationally driven by the rotary drive source 50 and a cam follower 61 that is reciprocally driven by the cam drive member 60. A drive pin 72 is connected to the cam follower 61 for movement therewith.

[0015] The cam mechanism is composed of a cylindrical cam driver 60 and a cylindrical cam follower 61 formed inside the cam driver 60. A cam pin 63 is protruded from one of the cam driver 60 and the cam follower 61, and a wave-shaped groove 68 that engages with the cam pin 63 is recessed into the other of the cam driver 60 and the cam follower 61. The wave-shaped groove 68 is formed in two stages, front and rear, on one of the cam driver 60 and the cam follower 61, and cam pins 63 are formed in two locations, front and rear, corresponding to each wave-shaped groove 68, at opposing positions on the remaining other.

[0016] The cam driver 60 is formed in a cylindrical shape, and cam pins 63 are formed on the front and rear of opposing positions on its inner surface. Inside the cam driver 60, a cylindrical cam follower 61 with a wave-shaped groove 68, a rotational drive source 50, and a support case 51 to which the rotational drive source 50 is fixed are arranged.

[0017] The front case 20 has a mounting opening 24 for mounting the movable massage body 5. The movable massage body 5 includes a rocking base 12 supported by the mounting opening 24, a passive arm 15 protruding from the rear of the rocking base 12, a bearing portion 16 provided at the rear of the rocking base 12 and supported by a rocking shaft 17, a rocking protrusion 13 protruding from the front of the rocking base 12, and a massage piece 14 made of an elastic material covering the outer surface of the rocking protrusion 13. The rocking protrusion 13 and the massage piece 14 are formed in a radial shape that expands outward as they go forward, and the bearing portion 16 is disposed inward from the base end of the rocking protrusion 13.

[0018] A return spring 45 is provided around the oscillation shaft 17 to urge the movable massage body 5 to oscillate from the second position toward the first position.

[0019] A stopper 46 is provided on the inner surface of the front case 20 for receiving the passive arm 15 of the movable massage body 5 which has been returned to the first position by a return spring 45.

[0020] A plurality of fixed massage bodies 6 are protrudingly provided on the front surface of the front case 20 and pressed against the surface of the human body in cooperation with the movable massage body 5.

[0021] The front ends of the massage pieces 14 of the movable massage body 5 are positioned forward of the front end of the fixed massage body 6.

[0022] A plurality of movable massage bodies 5 are provided at equal intervals in the circumferential direction on the front surface of the front case 20, and fixed massage bodies 6 are provided at equal intervals in the circumferential direction between adjacent movable massage bodies 5 in the circumferential direction. Effect of the Invention

[0023] According to the massage device of the present invention, by swinging the movable massage body 5 around the swinging shaft 17 by the drive structure 7 while pressing the massage device firmly against the surface of the human body, the massage stimulation caused by the swinging of the movable massage body 5, specifically, the stimulation when the movable massage body 5 swings on the surface of the human body, can be applied to the surface and deep parts of the body. Therefore, compared with conventional massage devices, the massage stimulation can be clearly applied to the human body, increasing the satisfaction obtained from the massage, and the massage device can be made one that is not easily boring.

[0024] The movable massage body 5 is adapted to be oscillated back and forth between a first position in which its front end is located on the rear side and a second position in which its front end is located on the front side, and if the oscillating motion of the front end of the movable massage body 5 between the first and second positions includes an X component which is a motion in the X direction and a Y component which is a motion in the Y direction, a complex massage stimulus including a pressing stimulus derived from the X component and a gripping stimulus derived from the Y component can be applied to the human body surface. Therefore, the massage effect exerted by the massage device can be further improved.

[0025] When the motion width of the Y component of the front end of the movable massage body 5 during the reciprocating swing motion is set larger than the motion width of the X component, the gripping stimulus derived from the Y component can be applied more strongly to the human body surface such as the scalp than the pressing stimulus derived from the X component.

[0026] When the movement width of the X component of the front end of the movable massage body 5 during the reciprocating swinging motion is set larger than the movement width of the Y component, the pressure stimulus derived from the X component can be applied more strongly to the human body surface such as the scalp than the gripping stimulus derived from the Y component.

[0027] The drive structure 7 includes a drive pin 72 that applies a pressing force to the movable massage body 5 to cause the movable massage body 5 to oscillate, and is configured so that the front end of the movable massage body 5 moves from the outside to the inside upon receiving the pressing force from the drive pin 72. According to this, the movable massage body 5 can be forcibly oscillated by the pressing force of the drive pin 72 from the drive structure 7, so that a larger gripping stimulus or pressing stimulus can be applied to the surface of the human body. Therefore, a more effective massage can be performed.

[0028] If the driving pin 72 is configured to move forward and backward in the X direction, which is the front-rear direction, and the movable massage body 5 is provided with a passive arm 15 that receives the forward pressing force of the driving pin 72, the passive arm 15 will receive the pressing force of the driving pin 72 that is operated to reciprocate linearly, and the movable massage body 5 can be oscillated. In this way, the driving structure 7 only needs to operate the driving pin 72 to reciprocate linearly, so that the driving structure 7 can be simplified and made compact.

[0029] If the operating pin 102 that connects the driving pin 72 and the passive arm 15 is provided, and the passive arm 15 is configured to move in the forward and backward directions in accordance with the forward and backward movement of the driving pin 72, the passive arm 15 of the movable massage body 5 can be forcibly pushed and moved by the forward and backward movement of the driving pin 72, and can also be forcibly pulled. Therefore, the movable massage body 5 can be swung with a strong force not only when the movable massage body 5 is swung from the first position to the second position, but also when it is returned from the second position to the first position. Therefore, a more effective massage can be performed.

[0030] If the head case 1 includes a cover case 21 and a front case 20 that is detachably attached to the front of the cover case 21, the drive structure 7 is assembled inside the cover case 21, and the passive arm 15 of the movable massage body 5 is assembled to the front case 20, the movable massage body 5 can be replaced by simply removing the movable massage body 5 together with the front case 20 from the cover case 21 and then attaching a new front case 20 to the cover case 21. According to this, even if the movable massage body 5 malfunctions due to aging, for example, the movable massage body 5 can be replaced by simply attaching a new movable massage body 5 together with the front case 20 to the cover case 21, so that the massage device can be used for a longer period of time. By removing the front case 20 from the cover case 21, cleaning and inspection of the inside of the front case 20 and the cover case 21 can also be easily performed. Furthermore, by preparing a plurality of types of front cases 20 equipped with movable massage bodies 5 with different vibration actions and replacing the front case 20 with the cover case 21, a massage device that exerts different massage effects can be obtained. Furthermore, when the front case 20 is attached to the cover case 21, if the passive arm 15 of the movable massage body 5 and the drive pin 72 are configured to be adjacent to each other in the front and rear, then simply by attaching the front case 20 to the cover case 21, the passive arm 15 of the movable massage body 5 and the drive pin 72 can be arranged adjacent to each other in the front and rear, thereby constructing a power transmission structure from the drive pin 72 to the movable massage body 5.Therefore, when replacing the movable massage body 5, there is no need to assemble or connect the two together for power transmission, and the replacement work of the movable massage body 5 can be carried out more quickly and easily.

[0031] The drive structure 7 includes a rotary drive source 50 and a motion conversion mechanism that converts the rotary motion of the rotary drive source 50 into a reciprocating motion, and the motion conversion mechanism is composed of a cam mechanism including a cam original 60 that is rotationally driven by the rotary drive source 50 and a cam follower 61 that is reciprocally driven by the cam original 60, and when the drive pin 72 is connected to the cam follower 61 so as to be movable together with the cam follower 61, the cam mechanism consisting of the cam original 60 and the cam follower 61 converts the rotary motion of the rotary drive source 50 into a reciprocating motion, and the drive pin 72 can be moved forward and backward by the reciprocating motion of the cam follower 61. As described above, by using a cam mechanism including the cam original 60 that is rotationally driven by the rotary drive source 50 and the cam follower 61 that is reciprocally driven by the cam original 60, the converted reciprocating motion can be output toward the movable massage body 5 through the drive pin 72 while preventing the structure of the motion conversion mechanism from becoming complicated.

[0032] The cam mechanism is composed of a cylindrical cam driver 60 and a cylindrical cam follower 61 formed inside the cam driver 60, and a cam pin 63 is protruded from either the cam driver 60 or the cam follower 61, and a wave-shaped groove 68 engaging with the cam pin 63 is recessed from the other of the cam driver 60 and the cam follower 61, and a configuration can be adopted in which the wave-shaped groove 68 is formed in two stages, front and rear, on either the cam driver 60 or the cam follower 61, and the cam pins 63 are formed in two locations, front and rear, corresponding to each wave-shaped groove 68, on the other opposing position of the remaining one. With this, the number of engagement points between the wave-shaped groove 68 and the cam pin 63 can be doubled compared to a configuration in which, for example, the wave-shaped groove 68 is formed in one stage, front and rear, on either the cam driver 60 or the cam follower 61, and the cam pins 63 are formed in one location, front and rear, corresponding to each wave-shaped groove 68, on the other opposing position of the remaining one, and the cam pins 63 are formed in one location, front and rear, corresponding to each wave-shaped groove 68, so that the cam follower 61 can be reciprocated more stably, and power conversion from rotational motion to reciprocating motion can be smoothly performed. Furthermore, simply by arbitrarily setting the amplitude of each reciprocation of the cam follower 61 per rotation of the cam drive 60, the amplitude state of the cam follower 61, the forward and backward state of the drive pin 72, and even the oscillation state of the movable massage body 5 can be changed. For example, when the amplitude number of times of each reciprocation of the cam follower 61 per rotation of the cam drive 60 is set to "2", the number of reciprocations of the cam follower 61 per unit time can be doubled compared to when the amplitude number is set to "1".

[0033] The cam driver 60 is formed in a cylindrical shape, and the cam pins 63 are formed on the inner circumferential surface of the cam driver 60 at the front and rear of the opposing positions. If the cylindrical cam follower 61 with the wavy groove 68, the rotary drive source 50, and the support case 51 to which the rotary drive source 50 is fixed are arranged inside the cam driver 60, the structure of the motion conversion mechanism from the rotary drive source 50 to the cam follower 61 can be made compact. In addition, the massage device with the movable massage body 5 can be made smaller by the amount that the structure of the motion conversion mechanism, which is the main structure, becomes compact. Furthermore, by changing the shape of the wavy groove 68 of the cam follower 61, various reciprocating motions can be realized, so that massage stimuli with various amplitudes can be given with a simple structure.

[0034] When the oscillating protrusion 13 and the massage piece 14 are formed radially, expanding outward as they go forward, and the bearing portion 16 is positioned closer to the inside than the base end of the oscillating protrusion 13, the movable massage body 5 oscillates and rotates around the oscillating axis 17 in response to the pressing force of the drive pin 72, so that the reciprocating oscillating motion between the first and second positions of the front end of the movable massage body 5 can include an X component, which is a motion in the X direction, and a Y component, which is a motion in the Y direction.

[0035] When a return spring 45 for urging the movable massage body 5 to swing from the second position to the first position is provided around the swing shaft 17, the movable massage body 5 that has been swing-operated to the second position on the front side by the drive pin 72 of the drive structure 7 can be returned to the first position on the rear side by the return spring 45. The return spring 45 can be provided not only in a configuration in which the movable massage body 5 is swing-operated only to the second position by the drive pin 72, but also in a configuration in which the drive pin 72 and the passive arm 15 are connected to each other by the operation pin 102 so that they can move together, and in either case, the movable massage body 5 can be returned to the first position when the drive structure 7 is stopped.

[0036] When a stopper 46 is provided on the inner surface of the front case 20 to receive the passive arm 15 of the movable massage body 5 that has been returned to the first position by the return spring 45, the movable massage body 5 can be accurately held in the first position on the rear side and prevented from being displaced further rearward, so that the oscillation stroke of the movable massage body 5 can always be kept constant.

[0037] When a plurality of fixed massage bodies 6, which are pressed against the human body surface together with the movable massage body 5, are protrudingly provided on the outer surface of the front case 20, massage stimuli with different stimulating modes can be applied to a plurality of locations on the human body surface by the movable massage body 5 and the fixed massage body 6, so that the massage effect can be improved compared to a massage device equipped with a conventional massage body. In addition, when the movable massage body 5 is pressed against the human body surface, the fixed massage body 6 comes into contact with the human body surface, so that the degree of pressing of the movable massage body 5 can be limited, so that the driving resistance due to the friction between the human body surface and the movable massage body 5 can be prevented from becoming excessive. This makes it possible to suppress the motor load from increasing with the increase in driving resistance, so that it is possible to prevent the driving structure 7 from breaking down and the power consumption from increasing.

[0038] If the front end of the massage piece 14 of the movable massage body 5 is located forward of the front end of the fixed massage body 6, the movable massage body 5 can be brought into contact with the human body surface before the fixed massage body 6 comes into contact with the human body surface, so that the limit of the pressing force of the movable massage body 5 against the human body surface can be defined. This makes it possible to prevent the massage stimulation by the movable massage body 5 from becoming excessive. Also, the massage stimulation by the movable massage body 5 can be accurately applied to the human body surface.

[0039] On the front surface of the front case 20, a plurality of movable massage bodies 5 are formed at equal intervals in the circumferential direction, and the fixed massage bodies 6 are provided at equal intervals in the circumferential direction between adjacent movable massage bodies 5 in the circumferential direction. This allows the fixed massage bodies 6 to come into contact with the human body surface between adjacent movable massage bodies 5 in the circumferential direction, so that the effect of limiting the degree of pressing of the movable massage bodies 5 can be obtained more accurately. In other words, in a configuration in which the movable massage bodies 5 and the fixed massage bodies 6 are distributed vertically, for example, such that a plurality of movable massage bodies 5 are arranged on the upper half side of the front case 20 and the fixed massage bodies 6 are arranged on the lower half side of the front case 20, the effect of limiting the degree of pressing of the movable massage bodies 5 by the fixed massage bodies 6 is not exerted on the upper half side, and the driving resistance due to friction between the human body surface and the movable massage bodies 5 may become excessive. In contrast, when the fixed massage bodies 6 are provided at equal intervals between adjacent movable massage bodies 5 in the circumferential direction as in the present invention, the fixed massage bodies 6 can be brought into contact with the human body surface between the movable massage bodies 5, and the degree of pressing of the movable massage bodies 5 can be limited by the fixed massage bodies 6, thereby preventing the massage stimulation intensity of the movable massage bodies 5 from becoming excessive. In addition, since the driving resistance caused by the friction between the human body surface and the movable massage bodies 5 can be prevented from becoming excessive, the motor load caused by the increase in driving resistance can be suppressed, and the driving structure 7 can be prevented from breaking down or the power consumption from increasing. [Brief description of the drawings]

[0040] [Figure 1] 1 is a cross-sectional side view of a main part of a massage device according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a front view showing a massage device according to a first embodiment. [Diagram 3] FIG. 2 is a vertical cross-sectional side view of the massage device with the outer shell structure broken away. [Figure 4] 3 is a cross-sectional view taken along line AA in FIG. 2. [Diagram 5] FIG. 2 is an exploded cross-sectional view showing a drive structure. [Figure 6]FIG. 2 is an exploded cross-sectional view showing the peripheral structure of a motor of the drive structure. [Figure 7] FIG. 4 is an exploded perspective view showing a peripheral structure of a drive pin of the drive structure. [Figure 8] FIG. 11 is a view taken along the arrow BB in FIG. [Figure 9] FIG. 11 is a view taken along the arrow CC in FIG. [Figure 10] FIG. 2 is a plan view of the massage device with the front case separated. [Figure 11] FIG. 13 is an exploded view of the cam follower wave groove. [Figure 12] 11 is an explanatory diagram showing a transmission structure between a drive pin and a massage body. FIG. [Figure 13] FIG. 2 is a front view of the massage device omitting the movable massage body. [Figure 14] FIG. 6 is an explanatory diagram showing a drive structure according to a second embodiment of the present invention. [Figure 15] 15 is a cross-sectional view taken along line DD in FIG. 14. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] (First embodiment) Figures 1 to 13 show a first embodiment in which the massage device according to the present invention is incorporated into a shower head. In this embodiment, the front, rear, left, right, and up and down refer to the crossed arrows shown in Figures 1, 2, and 3 and the indications of front, rear, left, right, and up and down written near each arrow. In Figures 2 and 3, the massage device includes a head case 1 of a shower head, a water outlet 2 opened on the front surface of the head case 1, a massage section 3 protruding from the front surface of the head case 1, and a grip 4 extending downward and forward from the lower peripheral surface of the head case 1. The massage section 3 is composed of a total of nine movable pieces 5A and a total of six fixed pieces 6A, and in this embodiment, a total of three movable massage bodies 5 each having three movable pieces 5A and a total of three fixed massage bodies 6 each having two fixed pieces 6A are arranged on the front surface of the head case 1. As shown in Fig. 2, the movable massage body 5 and the fixed massage body 6 are disposed at equal intervals in the circumferential direction on the front surface of the head case 1, and the fixed massage body 6 is disposed between adjacent movable massage bodies 5. Three movable pieces 5A constituting each movable massage body 5 are arranged in a row in the circumferential direction on the front surface of the head case 1. Two fixed pieces 6A constituting the fixed massage body 6 are arranged in a row in the radial direction on the front surface of the head case 1. As shown in Fig. 3, a drive structure 7 for swinging the movable massage body 5 is provided inside the head case 1.

[0042] As shown in FIG. 3, a changeover switch 8 mounted on a board is provided on the inner rear surface of the head case 1, and the operating state of the drive structure 7 can be changed by switching the switch 8 with an operation button 9 attached to the head case 1. When the operation button 9 is pressed from a state in which the drive structure 7 is stopped, the drive structure 7 is driven at a low speed, and when the operation button 9 is pressed again, the drive structure 7 is driven at a high speed. When the operation button 9 is pressed again, the operation of the drive structure 7 is stopped. In this way, the changeover switch 8 and the operation button 9 cyclically switch the drive state of the drive structure 7. As shown in FIG. 2, a secondary battery 10 that supplies power to the drive structure 7 is provided inside the grip 4.

[0043] As shown in Fig. 1 and Fig. 2, the movable massage body 5 includes a swing base 12 formed in a fan shape when viewed from the front, a swing protrusion 13 protruding from the outer surface (front surface) of the base 12, a massage piece 14 made of an elastic material covering the outer surfaces of the swing base 12 and the swing protrusion 13, and a passive arm 15 and a bearing portion 16 protruding from the inner surface of the swing base 12. Three swing protrusions 13 are formed on one movable massage body 5 corresponding to the three movable pieces 5A, and a massage piece 14 is attached to each swing protrusion 13. The movable massage body 5 is attached to an attachment opening 24 described later, and the bearing portion 16 is supported by a swing shaft 17, so that the movable massage body 5 can swing between a first position in which its front end (the front end of the movable piece 5A) is located on the rear side as shown by a solid line in Fig. 12, and a second position in which its front end (the front end of the movable piece 5A) is located on the front side as shown by an imaginary line in Fig. 12. At the rear end of the passive arm 15, a passive seat 18 is formed which is oscillated by a drive pin 72 described later. As shown in FIG. 1, the movable piece 5A, which is composed of the oscillation protrusion 13 and the massage piece 14, is formed in a radial shape that spreads outward as it approaches the front. That is, when the casing central axis P of the head case 1 (see FIG. 3 and FIG. 4, which coincides with the front-rear direction) is defined, and the direction approaching the casing central axis P in a plane including the up-down direction and the left-right direction is defined as the inward direction, and the direction away from the casing central axis P is defined as the outward direction, the movable piece 5A is formed in a radial shape that spreads outward as it approaches the front. The bearing portion 16 and the oscillation shaft 17 are disposed on the side closer to the casing central axis P (inward direction) than the base end of the oscillation protrusion 13, and are supported by a bearing block 41 described later. Both ends of the oscillation shaft 17 are supported by the bearing portion 16.

[0044] As described above, a fixed massage body 6 having two fixed pieces 6A adjacent to each other in the radial direction is disposed between the three movable massage bodies 5. Each fixed massage body 6 is composed of a protrusion formed on the front case 20 (described later) and a massage piece made of an elastic material that covers the outer surface of the protrusion. In this way, when the front end of the movable piece 5A and the front end of the fixed piece 6A are each made of an elastic material, the elastic material can be elastically deformed to make the skin contact with the surface of the human body soft. In addition, the driving resistance between the surface of the human body and the movable piece 5A can be reduced.

[0045] As shown in Figures 3 and 4, the head case 1 is composed of a front case 20 with an opening at the rear, a cover case 21 attached to the inner surface of the rear opening of the front case 20, and a ring frame 22 fixed to the outer surface of the front case 20, and a grip base 23 for detachably connecting the grip 4 is integrally formed on the lower peripheral surface of the cover case 21. By removing the grip 4 from the grip base 23, the secondary battery 10 can be removed from the grip 4. The secondary battery 10 removed from the grip 4 is repeatedly charged by a charging device (not shown). The cover case 21 is a hollow drum-shaped case with an opening at the front.

[0046] As shown in Figs. 1 and 2, the front of the front case 20 is formed with a fan-shaped mounting opening 24 for mounting the movable massage body 5 to the front case 20, and a cylindrical wall 25 continuous with the opening 24. A water channel case 26 is fixed to the rear inner surface of the cylindrical wall 25, and a drive case 27 for accommodating the drive structure 7 is connected to the rear outer surface of the water channel case 26. The water channel case 26 is fixed to the front case 20 with a screw 28 (see Fig. 4), and the drive case 27 is fixed to the cover case 21 with a screw 29 (see Fig. 4). As shown in Figs. 2 and 12, a group of water outlets 2 for discharging water or hot water are opened on the front peripheral surface and center of the front case 20 surrounding the mounting opening 24. The joint surface between the front case 20 and the cover case 21 is sealed with a seal ring 111. The joint surface between the water channel case 26 and the cylindrical wall 25, and the joint surface between the water channel case 26 and the drive case 27 are sealed by seal rings 112, 113, respectively.

[0047] The water channel case 26 is integrally provided with a disk-shaped water channel frame 33, a central port 34 protruding from the front of the water channel frame 33, and a seal tube 35 continuing to the rear of the water channel frame 33. An annular water channel 36 is formed between the periphery of the water channel frame 33 and the inner surface of the front case 20, and an intermediate water channel 37 is formed inside the water channel frame 33 to guide water or hot water in the annular water channel 36 to the central port 34 (see FIG. 8). Water or hot water is supplied to the annular water channel 36 via a water passage 38 inside the grip 4 and the grip base 23. Bearing blocks 41 that support the oscillation shaft 17 are provided at three points on the front of the water channel frame 33.

[0048] As shown in Fig. 1, the bearing block 41 is integrally provided with a bearing portion 42 that supports the oscillation shaft 17 and a screw boss 43 that is connected to the rear of the bearing portion 42, and is fixed to the front surface of the waterway frame 33 by a screw 44 that is screwed into the screw boss 43. A return spring 45 that urges the movable massage body 5 to oscillate toward the first position is arranged around the oscillation shaft 17, and the bearing portion 42 is formed with a coil recess 41a that accommodates the coil portion of the return spring 45 and a spring arm recess 41b that receives one of the spring arms (see Fig. 12). The other end of the spring arm is received by the oscillation base 12, and urges the movable massage body 5 to oscillate in the clockwise direction around the oscillation shaft 17 toward the first position in Fig. 1. In order to always maintain a constant posture of the movable massage body 5, which is urged to oscillate in the first posture by the return spring 45, a stopper 46 for receiving the passive arm 15 is provided on the waterway frame 33 adjacent to the bearing block 41 (see Figure 1).

[0049] As shown in Fig. 4, the drive case 27 is integrally provided with a cylindrical wall 48 supported in a watertight manner by the cover case 21 and a partition wall 49 that closes the rear opening of the water channel case 26, and the drive structure 7 is housed in the space surrounded by the drive case 27 and the cover case 21. The joint surfaces of the drive case 27 and the cover case 21 are sealed with a seal ring 114. In addition, the periphery of the screw 29 that fastens the drive case 27 to the cover case 21 is sealed with a seal ring 115. The space between the peripheral wall of the central opening 34 of the water channel case 26 and the recessed portion of the front case 20 that receives the central opening 34 is sealed with a seal ring 116.

[0050] As shown in FIG. 5, the drive structure 7 includes a motor (rotation drive source) 50 with a DC reducer driven by power supplied from the secondary battery 10, a hollow cylindrical motor case (support case) 51 to which the motor 50 is fixed, and a motion conversion mechanism for converting the rotational motion of the motor 50 into a reciprocating motion. The motor case 51 is fixed to the drive case 27 by three screws 53 (see FIG. 6) screwed into bosses protruding from the rear surface of the drive case 27. The motor case 51, a drive base 54 fixed to the output shaft of the motor 50, and a cylindrical regulating case 56 disposed between a guide tube 55 (see FIG. 4) on the inner surface of the rear part of the cover case 21 and the drive base 54 are used as basic structures, and a motion conversion mechanism is provided between the motor case 51 and the regulating case 56. Ribs for holding the circumferential surface of a cam follower 61, which will be described later, are provided at regular intervals on the inner surface of the regulating case 56.

[0051] 5 to 7, the motion conversion mechanism is composed of a cam mechanism including a cam driver 60 fixed to the drive base 54 and a cam follower 61 reciprocated by the cam driver 60. The cam driver 60 is composed of a pair of semi-cylindrical pin frames 62 rotated by the motor 50, and a cam pin 63 provided at opposing positions on the inner surface of the pin frame 62 and rotating around the motor 50. The cam pin 63 is formed in a stepped shape at two positions, front and rear, of the pair of pin frames 62, and each pin frame 62 is fixed to the drive base 54 with a screw 64. An engagement claw portion 65 is formed on the inner surface of the front part of the regulating case 56, and this engagement claw portion 65 is engaged and captured by a locking claw 66 formed on the front part of the periphery of each pin frame 62 and a flange wall 67 protruding from the front end of the pin frame 62, thereby preventing the regulating case 56 from moving forward and backward.

[0052] The cam follower 61 is made of a hollow cylindrical cam having upper and lower two-stage wave grooves 68 recessed into its periphery for receiving the cam pin 63, and the inner surface of the cam barrel is guided and supported by the motor case 51 so as to be able to slide back and forth. Since the wave groove 68 is formed in a wave shape for one period, the cam follower 61 makes one reciprocating movement in the forward and backward directions over the distance indicated by the arrow in Figure 11 while the cam driver 60 makes one rotation. As described above, the cam follower 61, the motor case 51, and the motor 50 are disposed inside the pin frame 62.

[0053] As shown in Fig. 4 and Fig. 5, three drive pins 72 are provided at the output end of the drive structure 7, more specifically, between the cam follower 61 and the movable massage body 5, in order to transmit the reciprocating power obtained by converting the rotational motion of the motor 50 into reciprocating motion by the motion conversion mechanism to the movable massage body 5 to oscillate the movable massage body 5. The drive pins 72 are provided parallel to the casing central axis P, and are reciprocally driven by the motion conversion mechanism of the drive structure 7. As shown in Fig. 7, the drive pin 72 is integrally provided with a central shaft portion 73 having a drum-shaped cross section, an operation pin 74 with a rounded front end continuing to the front part of the central shaft portion 73, and a screw shaft 75 continuing to the rear part of the central shaft portion 73.

[0054] The screw shaft 75 of the drive pin 72 is inserted into a fastening hole 77 of a ring-shaped output frame 76 and fixed to the output frame 76 with two nuts 78 and a spring washer 79, and the central shaft portion 73 in this state is fixed in the fastening hole 77 so as not to rotate relative to the output frame 76. The output frame 76 with the drive pin 72 integrated therein is integrated with the cam follower 61 by screwing a screw 82 into the screw boss 80 in a state in which a pair of screw bosses 80 protruding from three positions on the rear surface are joined to connecting seats 81 formed by protruding from three positions on the front end of the cam follower 61 as shown in Fig. 7. The central shaft portion 73 of the drive pin 72 is guided by a guide hole 87 of a guide frame 86 fastened to the rear surface of the partition wall 49 of the drive case 27 with a screw 85, and further, the operating pin 74 of the drive pin 72 is guided by a pin hole 88 formed in the partition wall 49 (see Fig. 1).

[0055] As shown in Fig. 1 and Fig. 6, a seal body 89 that can deform back and forth with the operation pin 74 is provided between the guide frame 86 and the partition wall 49. The front end of the operation pin 74 exposed to the front part of the partition wall 49 through a pin hole 88 contacts the passive seat 18 at the tip of the passive arm 15 of the movable massage body 5. The drive pin 72 is reciprocated by a motion conversion mechanism, and the movement of the drive pin 72 moving forward and backward toward the movable massage body 5 causes the movable piece 5A of the movable massage body 5 to swing from the first position to the second position. Also, when the drive pin 72 moves away from the movable massage body 5, the spring force of the return spring 45 causes the movable piece 5A of the movable massage body 5 to swing back from the second position to the first position.

[0056] As described above, the movable massage body 5 and its associated structure are assembled to the front case 20 and the waterway case 26, while the drive structure 7 from the motor 50 to the drive pin 72 is assembled inside the cover case 21 and the drive case 27. In order to facilitate cleaning and inspection of the opposing surfaces of the front case 20 and the drive case 27, the front case 20 is detachably attached to the cover case 21. In detail, as shown in Figs. 8 to 10, bayonet grooves 93 are formed at four locations on the outer surface of the peripheral wall of the front opening of the cover case 21, and bayonet protrusions 94 are provided at four locations on the inner surface of the rear opening of the front case 20. Furthermore, in order to confirm the relative positions of the bayonet grooves 93 and the bayonet protrusions 94 even when the front case 20 is joined to the cover case 21 and the bayonet grooves 93 are covered by the front case 20, position indicators 95 are provided at two locations on the periphery of the joint of the front case 20, and position indicators 96 are provided on the periphery of the joint of the cover case 21 as a reference when joining. The joint between the grip 4 and the grip base 23 is also provided with position indicators 97, 98 similar to those described above.

[0057] When separating the front case 20 from the cover case 21 for cleaning or the like, the bayonet structure between the two (front case 20, cover case 21) can be released by rotating the front case 20 counterclockwise relative to the cover case 21. In this state, as shown in Figures 8 and 9, the drive pin 72 and the passive arm 15 can be visually observed, and further, the rear surface of the water channel frame 33 and the front surface of the drive case 27 can be exposed, so that it is easy to clean the opposing surfaces of the front case 20 and the cover case 21 and to check the state of the drive pin 72 and the passive arm 15.

[0058] As shown in FIG. 12, when the direction perpendicular to the oscillation axis 17 and parallel to the casing central axis P of the head case 1 in the front-rear direction is defined as the X direction, and the direction perpendicular to the oscillation axis 17 and perpendicular to the casing central axis P is defined as the Y direction, the reciprocating oscillation between the first posture and the second posture of the front end of the movable piece 5A constituting the movable massage body 5 includes an X component which is an X-direction movement and a Y component which is a Y-direction movement. The X component movement is a pressing component because the front end of the movable piece 5A presses the human body surface forward. The Y component movement is a gripping component because the front end of the movable piece 5A expands and contracts the human body surface from the outside to the inside. In this embodiment, the movement width of the Y component (grasping component) is set larger than the movement width of the X component (pressing component), so that the massage stimulation applied to the human body surface such as the scalp is stronger as a gripping stimulation than a pressing stimulation. When the direction perpendicular to the X-direction and the Y-direction is defined as the Z-direction, the central axis of the oscillation shaft 17 of each movable massage body 5 is set in the Z-direction. When a circle is assumed to be centered on the casing central axis P of the head case 1, the Z-direction coincides with the tangent direction of the circle.

[0059] As shown in FIG. 12, when the protruding height of the movable piece 5A from the oscillation base 12 in the first posture is H1 and the protruding height of the fixed piece 6A from the oscillation base 12 is H2, the former protruding height H1 is set larger than the latter protruding height H2. In other words, the front end of the movable piece 5A (massage piece 14) of the movable massage body 5 is positioned forward of the front end of the fixed piece 6A of the fixed massage body 6. In this way, when the protruding height H1 of the movable piece 5A is set larger than the protruding height H2 of the fixed piece 6A, the massage piece 14 of the movable massage body 5 can be brought into contact with the human body surface before the fixed massage body 6 comes into contact with the human body surface. In addition, when the massage piece 14 is pressed against the human body surface, the massage piece 14 can be prevented from being pressed further against the human body surface at the time when the fixed massage body 6 is received by the human body surface.

[0060] When using the massage device to apply a massage stimulus to the surface of the human body, the operation button 9 is operated to operate the drive structure 7. When the motor 50 is driven at a low or high speed, the pin frame 62 and the cam pin 63 are driven to rotate around the motor 50, and the cam follower 61, which receives the rotation of the cam pin 63 in the wave groove 68, is driven to reciprocate in a direction that coincides with the casing central axis P (front-rear direction). The movement of the cam follower 61 is transmitted to the movable massage body 5 via the output frame 76 and the drive pin 72, and the entire movable massage body 5 oscillates around the oscillation shaft 17. Accordingly, each massage piece 14 expands and contracts in the radial direction when viewed from the front, and a massage stimulus is applied to the surface of the human body.

[0061] The massage pieces 14 made of elastic material can be elastically deformed when pressed against the surface of the human body, so that the movable massage body 5 driven by the drive structure 7 can be made to feel soft on the skin, and furthermore, the driving resistance between the surface of the human body and the movable massage body 5 can be reduced. Incidentally, when the fixed massage body 6 is a rigid body, it is possible to impart to the surface of the human body massage stimulation with a soft touch from the movable massage body 5 and massage stimulation with a hard touch from the fixed massage body 6.

[0062] As described above, in the massage device of this embodiment, the movable massage body 5 is oscillated around the oscillation axis 17 by the drive structure 7 while the massage device is strongly pressed against the surface of the human body, and the massage stimulation caused by the oscillation of the movable massage body 5, specifically, the stimulation when the movable massage body 5 oscillates on the surface of the human body, can be applied to the surface and deep parts of the body. Therefore, compared with conventional massage devices, the massage stimulation can be clearly applied to the human body, increasing the satisfaction obtained from the massage, and making it difficult to get bored. In addition, according to the shower head in which the massage device is incorporated, water or hot water can be sprayed from the water outlet 2 onto the surface of the human body while the movable massage body 5 is oscillated around the oscillation axis 17 by the drive structure 7, so that, for example, if the movable massage body 5 is pressed against the scalp and driven, it is possible to massage the scalp while washing the hair. Therefore, according to the massage device incorporated in the shower head of this embodiment, it is not necessary for the user to apply the massage stimulation by himself, and the massage stimulation can be applied by pressing the movable massage body 5 against the surface of the human body while spraying water or hot water on the surface of the human body. With the supply of cold or hot water stopped, the movable massage body 5 driven to oscillate can be pressed against the surface of the human body to perform a massage.

[0063] The movable massage body 5 is oscillated back and forth between a first position where its front end is located on the rear side and a second position where its front end is located on the front side, and the oscillating motion of the front end of the movable massage body 5 between the first and second positions includes an X component which is a motion in the X direction and a Y component which is a motion in the Y direction, so that a complex massage stimulus including a pressing stimulus derived from the X component and a gripping stimulus derived from the Y component can be applied to the human body surface. Therefore, the massage effect exerted by the massage device can be further improved.

[0064] Since the motion width of the Y component of the front end of the movable massage body 5 during reciprocating rocking motion is set larger than the motion width of the X component, the gripping stimulus derived from the Y component can be applied more strongly to the human body surface such as the scalp than the pressing stimulus derived from the X component.

[0065] The drive structure 7 includes a drive pin 72 that applies a pressing force to the movable massage body 5 to cause the movable massage body 5 to oscillate, and is configured so that the front end of the movable massage body 5 moves from the outside to the inside upon receiving the pressing force from the drive pin 72. This makes it possible to forcibly oscillate the movable massage body 5 by the pressing force of the drive pin 72 from the drive structure 7, and to apply a larger gripping or pressing stimulus to the surface of the human body. This allows for a more effective massage.

[0066] The driving pin 72 is configured to move forward and backward in the X direction, which is the front-rear direction, and the movable massage body 5 is provided with a passive arm 15 that receives the forward pressing force of the driving pin 72, so that the pressing force of the driving pin 72 that is operated to reciprocate linearly is inherited by the passive arm 15, and the movable massage body 5 can be oscillated. In this way, in this embodiment, the driving structure 7 is configured to operate the driving pin 72 to reciprocate linearly, so that the driving structure 7 can be simplified and made compact.

[0067] The head case 1 is provided with a cover case 21 and a front case 20 that is detachably attached to the front of the cover case 21. The drive structure 7 is assembled inside the cover case 21, and the passive arm 15 of the movable massage body 5 is assembled to the front case 20. Therefore, the movable massage body 5 can be replaced by simply removing the movable massage body 5 together with the front case 20 from the cover case 21 and then attaching a new front case 20 to the cover case 21. According to this, even if the movable massage body 5 becomes inoperable due to aging, the movable massage body 5 can be replaced by simply attaching a new movable massage body 5 together with the front case 20 to the cover case 21, so that the massage device can be used for a longer period of time. By removing the front case 20 from the cover case 21, cleaning and inspection of the inside of the front case 20 and the cover case 21 can also be easily performed. Furthermore, by preparing a plurality of types of front cases 20 equipped with movable massage bodies 5 with different vibration actions and replacing the front case 20 with the cover case 21, a massage device that exerts different massage effects can be obtained. In addition, since the passive arm 15 of the movable massage body 5 and the drive pin 72 are configured to be adjacent to each other in the front and rear direction when the front case 20 is attached to the cover case 21, the passive arm 15 of the movable massage body 5 and the drive pin 72 are adjacent to each other in the front and rear direction simply by attaching the front case 20 to the cover case 21, and a power transmission structure from the drive pin 72 to the movable massage body 5 can be constructed. Therefore, when replacing the movable massage body 5, there is no need to perform an assembly work or a connection work for the two for power transmission, and the replacement work of the movable massage body 5 can be performed more quickly and easily.

[0068] The drive structure 7 includes a motor 50 and a motion conversion mechanism that converts the rotational motion of the motor 50 into a reciprocating motion. The motion conversion mechanism is composed of a cam mechanism including a cam driver 60 that is rotationally driven by the motor 50 and a cam follower 61 that is reciprocally driven by the cam driver 60. The drive pin 72 is connected to the cam follower 61 so that it can move together with the cam follower 61. The cam mechanism including the cam driver 60 and the cam follower 61 converts the rotational motion of the motor 50 into a reciprocating motion, and the drive pin 72 can be moved forward and backward by the reciprocating motion of the cam follower 61. As described above, by using a cam mechanism including the cam driver 60 that is rotationally driven by the motor 50 and the cam follower 61 that is reciprocally driven by the cam driver 60, the converted reciprocating motion can be output toward the movable massage body 5 through the drive pin 72 while preventing the structure of the motion conversion mechanism from becoming complicated.

[0069] The cam mechanism consists of a cylindrical cam driver 60 and a cylindrical cam follower 61 formed inside the cam driver 60. Cam pins 63 are protruded from the cam driver 60 at two locations, one at the front and one at the back, and the cam follower 61 is formed with wave-shaped grooves 68 for engaging with the cam pins 63 in two stages, one at the front and one at the back. Therefore, compared with a configuration in which the cam follower 61 is formed with wave-shaped grooves 68 in one stage, one at the front and one at the back, and the cam pins 63 are formed on the cam driver 60 at one location, one at the front and one at the back, the number of engagement points between the wave-shaped grooves 68 and the cam pins 63 can be doubled. This makes it possible to reciprocate the cam follower 61 more stably, and smoothly convert power from rotational motion to reciprocating motion. Furthermore, simply by arbitrarily setting the amplitude of each reciprocation of the cam follower 61 per rotation of the cam drive 60, the amplitude state of the cam follower 61, the forward and backward state of the drive pin 72, and even the oscillation state of the movable massage body 5 can be changed. For example, when the amplitude number of times of each reciprocation of the cam follower 61 per rotation of the cam drive 60 is set to "2", the number of reciprocations of the cam follower 61 per unit time can be doubled compared to when the amplitude number is set to "1".

[0070] The cam driver 60 is formed in a cylindrical shape, and the cam pins 63 are formed at the front and rear of the opposing positions on the inner circumferential surface of the cam driver 60. The cylindrical cam follower 61 with the wavy groove 68 and the motor case 51 to which the motor 50 is fixed are disposed inside the cam driver 60, so that the structure of the motion conversion mechanism from the motor 50 to the cam follower 61 can be made compact. In addition, the massage device with the movable massage body 5 can be made smaller by the amount that the structure of the motion conversion mechanism, which is the main structure, becomes compact. Furthermore, by changing the shape of the wavy groove 68 of the cam follower 61, various reciprocating motions can be realized, so that massage stimulation with various amplitudes can be given with a simple structure.

[0071] The movable piece 5A consisting of the oscillating protrusion 13 and the massage piece 14 is formed radially so as to expand outward as it moves forward, and the bearing portion 16 is positioned closer to the inside than the base end of the oscillating protrusion 13. Therefore, when the movable massage body 5 oscillates and rotates around the oscillating axis 17 in response to the pressing force of the drive pin 72, the reciprocating oscillating motion of the front end of the movable massage body 5 between the first and second positions can be made to include an X component, which is a motion in the X direction, and a Y component, which is a motion in the Y direction.

[0072] A return spring 45 is provided around the oscillation shaft 17 to urge the movable massage body 5 to oscillate toward the first position, so that the movable massage body 5 oscillated to the second position on the front side by the drive pin 72 of the drive structure 7 can be returned to the first position on the rear side by the return spring 45. A stopper 46 is provided on the inner surface of the front case 20 to receive the passive arm 15 of the movable massage body 5 returned to the first position by the return spring 45, so that the movable massage body 5 can be accurately held in the first position on the rear side and prevented from being displaced further rearward, so that the oscillation stroke of the movable massage body 5 can always be kept constant.

[0073] Since a plurality of fixed massage bodies 6, which are pressed against the human body surface together with the movable massage body 5, are protrudingly provided on the outer surface of the front case 20, massage stimuli with different stimulating modes can be applied to a plurality of locations on the human body surface by the movable massage body 5 and the fixed massage body 6, and the massage effect can be improved compared to a massage device equipped with a conventional massage body. In addition, when the movable massage body 5 is pressed against the human body surface, the fixed massage body 6 comes into contact with the human body surface, thereby limiting the degree of pressing of the movable massage body 5, and thus preventing excessive drive resistance due to friction between the human body surface and the movable massage body 5. This makes it possible to suppress the motor load from increasing with an increase in drive resistance, and therefore prevents the drive structure 7 from breaking down and the power consumption from increasing.

[0074] Since the front end of the massage piece 14 of the movable massage body 5 is positioned forward of the front end of the fixed massage body 6, the movable massage body 5 can be brought into contact with the human body surface before the fixed massage body 6 comes into contact with the human body surface. Also, since the pressing limit of the movable massage body 5 against the human body surface can be determined by the fixed massage body 6, it is possible to prevent the massage stimulation by the movable massage body 5 from becoming excessive. Also, the massage stimulation by the movable massage body 5 can be accurately applied to the human body surface.

[0075] A plurality of movable massage bodies 5 are formed at equal intervals in the circumferential direction on the front surface of the front case 20, and the fixed massage bodies 6 are provided at equal intervals in the circumferential direction between adjacent movable massage bodies 5 in the circumferential direction, so that the fixed massage bodies 6 can be brought into contact with the human body surface between adjacent movable massage bodies 5 in the circumferential direction, and the effect of limiting the degree of pressing of the movable massage bodies 5 can be obtained more accurately. In other words, in a configuration in which the movable massage bodies 5 and the fixed massage bodies 6 are distributed vertically, for example, such that a plurality of movable massage bodies 5 are arranged on the upper half side of the front case 20 and the fixed massage bodies 6 are arranged on the lower half side of the front case 20, the effect of limiting the degree of pressing of the movable massage bodies 5 by the fixed massage bodies 6 is not exerted on the upper half side, and the driving resistance due to friction between the human body surface and the movable massage bodies 5 may become excessive. In contrast, as in this embodiment, when the fixed massage bodies 6 are provided at equal intervals between the adjacent movable massage bodies 5 in the circumferential direction, the fixed massage bodies 6 can be brought into contact with the human body surface between the movable massage bodies 5, and the degree of pressing of the movable massage bodies 5 can be limited by the fixed massage bodies 6, thereby preventing the massage stimulation intensity of the movable massage bodies 5 from becoming excessive. In addition, since the driving resistance caused by the friction between the human body surface and the movable massage bodies 5 can be prevented from becoming excessive, the motor load caused by the increase in driving resistance can be suppressed, and the driving structure 7 can be prevented from breaking down or the power consumption from increasing.

[0076] In addition, the massage device (massage device) according to this embodiment can contribute to achieving some of the 17 goals set out in the "Sustainable Development Goals (SDGs)" established by the United Nations, such as "3: Good Health and Well-Being (Ensure healthy lives and promote well-being for all at all ages)."

[0077] (Second embodiment) Fig. 14 and Fig. 15 show a second embodiment of the massage device according to the present invention. The same structures and members as those in the first embodiment are given the same reference numerals, and their description will be omitted. In the second embodiment, a linear passive groove 101 that receives the forward and backward movement of the drive pin 72 is recessed near the tip of the passive arm 15 of the movable massage body 5, and an operation pin 102 provided at the front end of the drive pin 72 is engaged with the passive groove 101. In this way, when the drive pin 72 and the passive arm 15 are connected to be movable together via the operation pin 102 and the passive groove 101, the movable massage body 5 can be reliably driven to oscillate between the first position and the second position in conjunction with the reciprocating movement of the drive pin 72. Therefore, the return spring 45 and the passive seat 18 can be omitted. The movable massage body 5 oscillates from the first position to the second position when pushed by the drive pin 72, and oscillates from the second position to the first position when pulled by the drive pin 72.

[0078] As described above, in the massage device of this embodiment, the movement of the drive pin 72 moving forward and backward toward the movable massage body 5 is transmitted to the passive arm 15 by the operation pin 102, so that the movable massage body 5 can be forcibly oscillated between the first and second positions. In this way, according to the massage device of this embodiment, the movable massage body 5 is forcibly oscillated by the drive structure 7, so that a kneading stimulus that expands and contracts more greatly is applied to the surface of the human body, and an effective massage can be performed. In addition, the passive arm 15 of the movable massage body 5 is forcibly pushed or pulled by the forward and backward movement of the drive pin 72, so that the movable massage body 5 can be oscillated with a strong force not only when it is oscillated from the first position to the second position, but also when it is returned from the second position to the first position, thereby doubling the massage effect of the movable massage body 5. In addition, in the massage device of this embodiment, if necessary, a return spring 45 can be arranged around the oscillation shaft 17 to bias the movable massage body 5 back toward the first position.

[0079] In the above embodiment, the movement width of the Y component of the front end of the movable massage body 5 during reciprocating rocking motion is set to be larger than the movement width of the X component, but the present invention is not limited to this, and the movement width of the X component of the front end of the movable massage body 5 during reciprocating rocking motion may be set to be larger than the movement width of the Y component. In this case, the pressing stimulus originating from the X component can be applied more strongly to the human body surface such as the scalp than the gripping stimulus originating from the Y component.

[0080] In the above embodiment, the cam pin 63 is provided to protrude from the cam driver 60, and the cam follower 61 is recessed to have the wavy groove 68 that engages with the cam pin 63, but the present invention is not limited to this, and the cam pin 63 may be provided to protrude from the cam follower 61, and the cam driver 60 may be recessed to have the wavy groove 68 that engages with the cam pin 63. The massage device of the present invention can also be configured as a handheld, so-called hand massager. [Explanation of symbols]

[0081] 1 Head case 5 Movable massage body 6 Fixed massage body 7 Drive structure 12 Shaking Base 13 Oscillating protrusion 14 Massage Strips 15 Passive Arm 17 Swing shaft 20 Front Case 21 Cover Case 24 Installation opening 27 Drive case 41 Bearing block 45 Return spring 46 Stopper 50 Rotational drive source (motor) 60 Cam section 61 Cam Follower 62 Pin Frame 63 Campin 68 Wave groove 72 Drive pin

Claims

1. A head case (1) having a front case (20); a movable massage body (5) that protrudes forward from a front case (20) and is supported so as to be swingable about a swing shaft (17) provided on the front case (20); and a drive structure (7) provided inside the head case (1) for oscillating the movable massage body (5), The movable massage body (5) is adapted to be reciprocated between a first position in which its front end is located on the rear side and a second position in which its front end is located on the front side, When a direction perpendicular to the oscillation axis (17) and parallel to the casing central axis (P) of the head case (1), which is the front-rear direction, is defined as the X direction, and a direction perpendicular to the oscillation axis (17) and perpendicular to the casing central axis (P) is defined as the Y direction, The reciprocating rocking motion of the front end of the movable massage body (5) between the first posture and the second posture includes an X component which is a motion in the X direction and a Y component which is a motion in the Y direction; The drive structure (7) includes a drive pin (72) that applies a pressing force to the movable massage body (5) to cause the movable massage body (5) to oscillate, In the Y direction, the direction approaching the casing central axis (P) of the head case (1) is defined as the inward direction, and the direction moving away from the casing central axis (P) is defined as the outward direction. When the front end of the movable massage body (5) receives a pressing force from the drive pin (72), the front end of the movable massage body (5) moves from the outward direction to the inward direction. The drive pin (72) is configured to move forward and backward in the X direction, which is the front-rear direction. The movable massage body (5) is provided with a passive arm (15) that receives the forward pressing force of the drive pin (72), The front case (20) is provided with a mounting opening (24) for mounting the movable massage body (5), The movable massage body (5) comprises a rocking base (12) supported in the mounting opening (24), a passive arm (15) protruding from the rear of the rocking base (12), a bearing portion (16) provided at the rear of the rocking base (12) and supported by a rocking shaft (17), a rocking protrusion (13) protruding from the front of the rocking base (12), and a massage piece (14) made of an elastic material covering the outer surface of the rocking protrusion (13); The massage device is characterized in that the vibration projections (13) and massage pieces (14) are formed radially so as to expand outward as they move forward, and the bearing portion (16) is disposed inward from the base end of the vibration projection (13).

2. A massage device as described in claim 1, wherein a return spring (45) is provided around the oscillation axis (17) to urge the movable massage body (5) to oscillate from the second position toward the first position.

3. A massage device as described in claim 2, in which a stopper (46) is provided on the inner surface of the front case (20) to receive the passive arm (15) of the movable massage body (5) which has been returned to the first position by a return spring (45).

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