JP3207008B2 - Massage machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a backrest of a chair or a bed to which a user's back is applied, and massages the user by hitting or rubbing the back of the user by operating a pair of massage rollers. Related to massage machine.

[0002]

2. Description of the Related Art For example, a massage machine with a built-in chair is provided with a pair of massage rollers, these rollers are moved in opposite directions by a roller spacing adjusting mechanism to change the mutual spacing between the massage rollers, and a driving unit. There is known a device which selectively imparts a kneading motion and a hitting motion to a pair of massage rollers.
Moreover, the chair-incorporated massage machine is generally incorporated into the backrest of the chair so as to be able to move up and down.

[0003] In this type of massage machine, there are provided two running shafts extending in the width direction of the backrest portion and arranged in parallel with each other, and running rollers respectively disposed at both ends of these shafts are provided with a backrest portion. In some cases, the entire massage machine is moved by rolling contact with a rail attached to the massage machine. With such a configuration, the entire massage machine can be run not by simple reciprocating linear movement but by adapting to the bent shape of the backrest portion.

[0004]

By the way, in the structure provided with the roller spacing adjusting mechanism, the back of the user falls between the pair of massage rollers when the mutual spacing between the pair of massage rollers is greatly increased. Weight on two running axes.

Conventionally, however, the drive unit is not disposed between the pair of massage rollers but is disposed offset to one end on the outside thereof, and the two traveling shafts are rotatably supported at both ends thereof. The load applied to the two traveling shafts is supported only by the bearing structures at both ends of the two traveling shafts.

Therefore, it is necessary to increase the thickness of the two running shafts so as not to cause bending deformation, and to increase the strength of a bearing structure for supporting these shafts. Therefore, the conventional one has a problem that it is heavy and is disadvantageous for running the entire massage machine along the backrest portion of the chair.

An object of the present invention is to provide a massage machine which can be reduced in weight and is advantageous for running the whole.

[0008]

According to the present invention, there is provided a pair of massage rollers capable of performing a kneading motion and a hitting motion, and a width adjusting screw shaft having screw portions which are oppositely screwed to each other with respect to a center portion in the axial direction. A roller spacing adjusting mechanism that varies the mutual spacing between the two massage rollers by moving the two massage rollers in opposite directions by rotation of the shaft, and a motor that can rotate forward and backward, and A drive unit for selectively imparting a kneading motion and a hitting motion to the massage roller by forward / reverse rotation, and both ends rotatably supported and arranged on the front side of the front wall of the drive unit in parallel with each other. And a plurality of traveling shafts each having a rotatable traveling roller disposed at each of the both ends, and moving the massage roller at the time of adjusting the mutual interval. The whole in a direction perpendicular to the direction applied to the massage machine to be moved.

In order to achieve the above object, the drive unit is disposed between the pair of massage rollers, and a cover plate is fixed to the front wall of the drive unit from the front side thereof. A plurality of shaft fitting portions projecting forward along the entire length in the direction are formed by bending, and the two traveling shafts are separately fitted inside these shaft fitting portions, respectively, to thereby form an intermediate portion between the traveling shafts. The drive unit supports the shaft fitting portion and a front wall of the drive unit.

[0010]

In the structure of the massage machine, the drive unit disposed between the pair of massage rollers and the cover plate fixed to the front wall support the intermediate portions of the plurality of traveling shafts. Therefore, when the user's weight is applied to the traveling shaft, the load is mainly received by the drive unit to prevent bending deformation of the traveling shaft and reduce the load on the bearing structure that supports both ends of the traveling shaft. . Moreover, since the cover plate has a structure in which a plurality of shaft fitting portions are formed by bending, the strength of the cover plate is high and the cover plate can be made thin.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The machine frame denoted by reference numeral 21 in FIGS.
Left and right side plates 22, 23, horizontal members 24, 25 bridged across these side plates 22, 23, and other horizontal members 26, 2
7 is provided. The lateral member 26 is laterally suspended over a later-described speed reducer case connected to the side plate 23 and the side plate 22,
The horizontal member 27 is cantilevered by the side plate 22.

A drive unit 31 is disposed in the machine frame 21 at a substantially central portion in the width direction. The unit 31 includes a housing 32 forming a gear box, and a first motor 33 connected to an outer surface of the housing 32 and capable of rotating forward and reverse. The housing 32 is a horizontal member 2
While being supported in contact with the inner surface of the central part of 4, 25,
It is bolted to the horizontal member 27. As shown in FIG. 7 and the like, the rotating shaft 33 a of the first motor 33 is formed in a gear shape with teeth on the entire outer periphery thereof, and is inserted into the housing 32.

A driving device 34 is built in the housing 32. The configuration of the driving device 34 is shown in FIGS. In these figures, reference numeral 41 denotes an input shaft which extends in the left-right direction and has both ends rotatably supported by bearings 42.
The input gear 43 fixed to the outer periphery so as to be integrally rotated is meshed with the rotation shaft 33 a of the first motor 33. On the outer periphery of the input shaft 41, a kneading transmission gear 45 via a first one-way clutch 44 and a hitting transmission gear 47 via a second one-way clutch 46 are mounted, respectively.

When the rotating shaft 33a of the first motor 33 is rotated in the reverse direction, the first one-way clutch 44 is turned on to transmit the rotation of the input shaft 41 to the massaging system transmission gear 45, When the rotating shaft 33a of the first motor 33 is rotated forward, the turning off state of the input shaft 41 to the massaging system transmission gear 45 is used. Conversely, the second one-way clutch 46 is turned on when the rotation shaft 33a of the first motor 33 is rotated forward, and the input shaft 4
1 is transmitted to the hitting transmission gear 47 and the first
When the rotation shaft 33a of the motor 33 is rotated in the reverse direction, the motor 33 is turned off to cut off the rotation of the input shaft 41 to the hitting transmission gear 47.

As shown in FIG. 7, a support shaft 48 laid horizontally in parallel with the input shaft 41 is provided inside the housing 32.
Stopped at nine. The large-diameter gear portion 50a of the first reduction gear 50 rotatably supported by the shaft 48 is meshed with the kneading transmission gear 45. Furthermore, housing 3
2 incorporates a second reduction gear 51 as a massaging output gear, and this gear 51 is a small-diameter gear portion 5 of the first reduction gear 50.
0b.

A massaging massage shaft 52 extending in the left-right direction and projecting from both side surfaces of the housing 32 is rotatably supported by the housing 32 by a pair of bearings 53. The central portion of the shaft 52 in the axial direction passes through the boss portion 51a of the second reduction gear 51, and is spline-engaged with the inner peripheral surface of the boss portion 51a.

As shown in FIG. 8, a hitting output gear 54 meshed with a hitting transmission gear 47 is built in the housing 32. Further, in the housing 32,
A tapping massage shaft 55 protruding from both side surfaces is rotatably supported by a pair of bearings 56. This axis 5
Numeral 5 is parallel to the massaging massage shaft 52, and its axial center portion penetrates the boss portion 54a of the output gear 54, and is spline-engaged with the inner peripheral surface of the boss portion 54a.

The drive unit 31 has an electromagnetic brake 57. The brake 57 is mounted on the outer surface of the housing 32 at a position opposite to the first motor 33. The electromagnetic brake 57 has a non-excitation non-operating type, that is, a type that exerts a function of braking the brake shaft 57a shown in FIG. 7 when energized, and releases the braking function of the brake shaft 57a in a non-energized state. Has been adopted. The brake shaft 57a is inserted into the housing 32, and a brake gear 58 is fixed thereto. The brake gear 58 is meshed with the kneading transmission gear 45.

In the drive unit 31 having the above-described structure, when the rotation shaft 33a of the first motor 33 is rotated forward, the rotation is transmitted to the input shaft 41 via the input gear 43, and
The hitting transmission gear 47 is rotated via the one-way clutch 46. At this time, the first one-way clutch 44 is in the “disengaged” state, and no power enters the massaging massage shaft 52. Therefore, the tapping massage shaft 55 is rotated via the output gear 54 meshed with the tapping transmission gear 47. When the shaft 55 is rotationally driven, the electromagnetic brake 57 is energized, and the movement of the massaging massage system due to the load of the user is prevented.

When the rotating shaft 33a of the first motor 33 is rotated in the reverse direction in a state where the electromagnetic brake 57 is not operated, the rotation is performed via the input gear 43 and the input shaft 41 and via the first one-way clutch 44. To the transmission gear 45. At this time, the second one-way clutch 46 is in the “disengaged” state, power is not applied to the tapping massage shaft 55, and the brake shaft 57a and the brake gear 58 are idled integrally. Therefore, the rotation of the massaging system transmission gear 45
The speed is reduced via the first and second reduction gears 50 and 51 and transmitted to the massaging massage shaft 52, and the shaft 52 is rotated at a low speed.

As shown in FIG. 5, both ends of the massaging massage shaft 52 penetrating the housing 32 are
The bearings 61 are rotatably supported by bearings 61 respectively mounted on the bearings 2 and 23. As shown in FIGS. 5 to 7, 9, and 10, keys 62 are respectively attached to left and right side portions of the massage massage shaft 52 protruding from the housing 32. In FIG. 7, reference numeral 63 denotes a retaining ring for preventing the key 62 from coming off, and reference numeral 64 denotes a set screw.

A movable sleeve 65 is attached to each of the both sides of the massaging massage shaft 52. The pair of sleeves 65 are fitted to the both side portions so as to be slidable in the axial direction of the massage massage shaft 52. The movable sleeve 65 has an eccentric cam portion 65a and a connecting portion 65b as shown in FIG.

The eccentric cam portion 65a is a short-axis portion having an axis eccentric and inclined with respect to the axis of the movable sleeve 65. The inclinations of the axes of the eccentric cam portions 65a of the two movable sleeves 65 are opposite to each other. The connecting portion 65 b is provided concentrically with the axis of the movable sleeve 65.

A hub 67 is mounted on the outer peripheral surface of the eccentric cam portion 65a via a bearing 66. Therefore, a pair of hubs 67 are provided on the both side portions of the massaging massage shaft 52,
The shafts 52 are supported so as to be inclined in opposite directions to each other. As shown in FIGS. 1, 2, and 9, an arm 68 is connected to the hub 67, and a massage roller 69 is rotatably attached to the tip of the arm 68.

As shown in FIG.
The both ends of the tapping massage shaft 55 penetrating through the shaft 5
5 is provided coaxially with the housing penetration portion, and the side plate 2
Bearings 71 attached to the inner surfaces of the first and second members via a bearing bracket 70 are rotatably supported respectively. As shown in FIG. 8, the portions between both ends of the tapping massage shaft 55 and the housing penetrating portions form eccentric shaft portions 55a and 55b which are eccentric with respect to these. These eccentric shaft portions 55a and 55b are eccentric with respect to each other by 180 °.

Metal bearings 72 slidable in the axial direction are fitted to the eccentric shaft portions 55a and 55b, respectively. FIG.
As shown in the figure, a band-shaped joint 73 is connected to the outer periphery of both metal bearings 72 with the metal bearing 72 interposed therebetween. One end of a connecting rod 74 commonly called a ball stud is connected to the joint 73 via a pin 75. The connecting rod 74 is rotatable around the axis of the pin 75.

The other end 74 a of the connecting rod 74 having a spherical shape is connected to the hub 67. The connecting portion between the connecting rod 74 and the hub 67 is a spherical pair, and the other end of the connecting rod 74 is rotatably connected to the hub 67 in a universal joint shape.

Since the joint 73 is connected to the hub 67 via the connecting rod 74, the rotating shaft 33a of the first motor 33 is normally rotated as described above, and the tapping massage shaft 55 is appropriately rotated. When rotating at a high speed, the joint 73 connected to the metal bearing 72
And the beating massage shaft 55 is rotated while sliding on the inner peripheral surface of the metal bearing 72.

Since the shaft centers of the eccentric shaft portions 55a and 55b in which the metal bearing 72 is fitted are eccentric, the joint 73 and the connecting rod 74 move in the longitudinal direction with a stroke twice as large as the eccentric amount. It is reciprocated. for that reason,
The pair of hubs 67 are pushed and pulled by the corresponding connecting rods 74 and reciprocated about the bearings 66. Along with this, the massage roller 69 is synchronously moved via the arm 68, and the massage roller 69 performs a tapping motion.

The eccentricity of the eccentric shaft portions 55a and 55b is 1
Since it is shifted by 80 °, the pair of massage rollers 69 are moved in opposite directions to each other. At this time, no rotational force is applied to the massage massage shaft 52 and the massage operation of the massage massage shaft 52 is performed by the braking operation of the electromagnetic brake 57. Are kept stationary.

When the rotary shaft 33a of the first motor 33 is reversed and the massaging massage shaft 52 is properly rotated at a low speed, a pair of movable sleeves 65 is formed together with the shaft 52 via the key 62. Rotated. For this reason, the eccentric cam portion 65a moves the massage shaft 5 according to the inclination of its axis.
Apparent displacement is made so as to swing about the axis of 2 as a fulcrum.

The hub 67 fitted to the eccentric cam portion 65a via a bearing 66 is connected to a joint 73 via a connecting rod 74, and its rotation is restricted. Therefore, the hub 67 performs a swinging motion about the axis of the massaging massage shaft 52 in synchronization with the apparent displacement of the eccentric cam portion 65a.

At this time, the universal joint-shaped connecting portion between the hub 67 and the connecting rod 74 slips and the connecting rod 74
Is rotated about the axis of the pin 75 with respect to the joint 73 to enable the swinging movement.

The pair of hubs 67 operated as described above
The arm 68 is similarly swung with the swinging motion of
The pair of massage rollers 69 are synchronously moved in a direction in which they are moved toward and away from each other.
9 does a massaging exercise.

As shown in FIGS.
Bearings 8 are provided on the inner surfaces of the bearings 2 and 23 via bearing brackets 81.
2 are respectively supported, and a width adjusting screw shaft 83 is rotatably mounted across these bearings 82. The screw shaft 83 has a mutual interval A between the pair of massage rollers 69.
(See FIG. 6), and is arranged in parallel with each massage shaft 52, 55.

In FIG. 10, reference numeral 32a denotes a width adjusting screw shaft 83.
Are recesses formed in the housing 32 to escape the air. The width adjusting screw shafts 83 are respectively provided with screw portions 83a, 83a on the shaft portions protruded from the left and right sides of the housing 32, respectively.
83b, and these screw portions 83a and 83b are reversely screwed to each other.

As shown in FIGS. 9 to 11 and the like, a mover 92 which is moved in the axial direction of the width adjusting screw shaft 83 in conjunction with the hub 67 is screwed into each of the screw portions 83a and 83b. I have. As shown in FIG. 8, the pair of moving members 92 have a substantially U-shaped interlocking projection 92a in plan view (in FIG. 8).
A recess 93 is formed in the opposing walls of the projection 92a. The hitting massage shaft 55 is inserted into the interlocking protrusion 92a through the recess 93, and the metal bearing 72 and one end of a joint 73 sandwiching the metal bearing 72 are fitted in the interlocking protrusion 92a.

Of course, the fitting portion has a play so as not to hinder the vibration of the joint 73 caused by the rotation of the tapping massage shaft 55 and the movement of the joint 73 caused by the rotation of the massage shaft 52.

The connecting portion 65 of the pair of movable sleeves 65
Hub supports 96 are rotatably fitted to the outer periphery of b. As shown in FIG. 9, an interlock 94 is screwed to each of the pair of movers 92. These interlocks 94
The arm 94a is provided so as to hold the hub support 96 from the outer periphery thereof, and is screwed.

On the inner surface of one of the side plates 22, a second motor 84 that can rotate forward and reverse for width adjustment is mounted above the kneading massage shaft 52 in FIGS. On the outer surface of the side plate 22, a bearing bracket 85 facing one of the bearing brackets 81 mounted on the inner surface of the side plate 22 is mounted.

These opposed bearing brackets 81, 8
A driven pulley 87 rotatably supported at both ends thereof via bearings 86 is provided between the five pulleys 87. A gear portion 88 is formed on the shaft of the pulley 87. The side plate 22 of the width adjusting screw shaft 83 has a reduction gear 89 at one end thereof.
Which is engaged with the gear portion 88. A drive pulley 90 having a smaller diameter than the driven pulley 87 is attached to the rotation shaft of the second motor 84, and a timing belt 91 is provided between these pulleys 87, 90 across these.
Is wrapped around.

The width adjusting screw shaft 83, the second motor 84,
The driven pulley 87, the reduction gear 89, the driving pulley 90, the timing belt 91, the moving element 92, the interlocking element 94, the hub support 96, and the like form a roller interval adjusting mechanism 95. This mechanism 95 includes a pair of massage rollers 6.
9 are moved in opposite directions to change the mutual interval A.

That is, when the second motor 84 is operated, the rotation of the rotation shaft is transmitted to the driven pulley 87 via the driving pulley 90 and the timing belt 91, and the rotation of the pulley 87 is transmitted to the gear portion 88 thereof. The width adjusting screw shaft 83 is rotated via the reduction gear 89 meshing with the shaft.

The screw portion 83 of the screw shaft 83
The mover 92 screwed to each of a and 83b is connected to the movable sleeve 65 via an interlock 94 and a hub support 96, and is restricted from rotating. Therefore, the pair of movers 92 are moved in the axial direction of the screw shaft 83 as the width adjusting screw shaft 83 rotates.

Since the screw portions 83a and 83b are reverse-threaded, the pair of moving elements 92 are moved in opposite directions. For example, the motors are moved so as to be closer to each other by the forward rotation of the second motor 84 and to be separated from each other by the reverse rotation. At the same time as these movements, the pair of movable sleeves 65 connected to the mover 92 via the interlock 94 and the hub support 96 are moved in the axial direction of the massaging massage shaft 52, so that the pair of massage rollers 58 Are varied.

As shown in FIGS. 5 and 13, a speed reducer box 101 is mounted around the side plate 23 of the machine frame 21, and a third motor 102, which can rotate forward and reverse, is mounted on the outer surface of the box 101. Installed. In the box 101, a worm shaft 105 having an integral worm 103 and a reduction gear 104 is supported at both ends via bearings 106, and a drive gear 107 meshing with the reduction gear 104 is built in. I have.
The drive gear 107 is attached to the rotation shaft of the third motor 102 inserted in the speed reducer box 101 at 102a.

A rotatable wheel gear shaft 108 is inserted into the speed reducer box 101. Reference numeral 122 denotes a retaining plate. A worm wheel gear 109 that meshes with the worm 103 is attached to the wheel gear shaft 108. The wheel gear shaft 108 has a hollow structure, and a pinion shaft 110 that penetrates the wheel gear shaft 108 in the axial direction is provided at one end protruding outside the speed reducer box 101.
Are connected by spline engagement (121 in FIG. 13 indicates a spline engagement portion).

As shown in FIG. 6, the speed reducer box 10
The shaft support portions 111 and 112 are provided opposite to each other on the side plate 1 and the side plate 22, and a protection pipe 113 is laid across the shaft support portions 111 and 112. A pinion shaft 110 is rotatably passed through the pipe 113. A wheel gear shaft 108 is rotatably fitted and supported on the outer periphery of one end of the protection pipe 113 inserted into the reduction gear box 101 via a sleeve 125 containing lubricating oil. Pinion shaft 110
And the protection pipe 113 form a first traveling shaft 123.

When the pinion shaft 110 rotates, the protection pipe 113, which is supported at both ends so as not to rotate,
In addition to preventing the backrest cover from being wound around the pinion shaft 110, the weight of the user is less likely to act on the pinion shaft 110, which helps to make the pinion shaft 110 thinner.

On the outer peripheral surface of the one end of the wheel gear shaft 108, a pinion gear 114 is formed with teeth.
A cap-shaped pinion gear 1 that covers an end of the protection pipe 113 is provided at an end of the side plate 22 of the pinion shaft 110.
15 are connected by spline engagement. In addition,
Although not shown, this connection structure is the same as the structure of the connection between the wheel gear shaft 108 and one end of the pinion shaft 110.

A small-diameter end portion 108a of the wheel gear shaft 108 connected to the pinion shaft 110, and the pinion gear 11
A running roller 116 is rotatably supported on a small-diameter end portion (not shown) similar to the small-diameter end portion 5 that is fitted to the outer peripheral surface thereof.

The reduction gear box 101, the third motor 1
02, worm 103, reduction gear 104, drive gear 10
7, wheel gear shaft 108, worm wheel gear 109,
Pinion shaft 110, protection pipe 113, pinion gear 1
14, 115 and the traveling roller 116 form a self-propelled mechanism 117 for moving the entire massage machine.

As shown in FIG. 11, a shaft support 118 is attached to the inner surfaces of the side plates 22 and 23, and a second traveling shaft 119 is penetrated therethrough so that the second traveling shaft 119 is suspended between the side plates 22 and 23. I have. The second traveling shaft 119 is parallel to the first traveling shaft 123, and traveling rollers 120 are rotatably attached to both ends protruding to the side of the machine frame 21, respectively.

As shown in FIG. 14, on the back of the backrest (backrest) B of the chair in which the massage machine M is incorporated,
A rail C extending in the longitudinal direction of the backrest B is provided on both sides in the width direction. The massage machine M is provided so that its running rollers 116 and 120 are respectively brought into rolling contact with a pair of right and left rails C so as to be moved linearly or non-linearly in the longitudinal direction according to the shape of the backrest B. Can be Also,
On the back of the backrest B, a rack D (FIG. 1)
0, see FIG. 13), and the pinion gears 114 and 115 are individually meshed with them.

The self-propelled mechanism 117 has its third motor 10
The whole operation of the massage machine M is moved by the operation 2. That is, the operation of the third motor 102 causes the rotation shaft 10
The rotation of 2a is transmitted to the rotation shaft 105 via the drive gear 107 and the reduction gear 104, and further reduced through the engagement between the worm 103 and the worm wheel gear 109, and transmitted to the wheel gear shaft 108. .

Then, at the same time as the pinion gear 114 is rotated at a low speed, the other pinion gear 115 is synchronously rotated via the pinion shaft 110 spline-engaged with the wheel gear shaft 108. Therefore, the moving force is given to the whole massage machine M by the engagement between the pinion gears 114 and 115 and the rack D, and the massage machine M is arranged at both ends of the first and second traveling shafts 123 and 119. The running rollers 116 and 120 are moved in contact with the rail C.

Therefore, the rotating shaft 1 of the third motor 102
For example, when 02a is rotated forward, the entire massage machine M is raised along the backrest B, and when it is reversed, the entire massage machine M is lowered along the backrest B. In addition, since the massage machine M is provided with the second traveling shaft 119 in which the traveling rollers 120 are disposed at both ends,
The massage machine M can be moved smoothly by preventing swinging around the running shaft 123.

The first to third motors 33, 84, 102 and the worm speed reducer are relatively heavy and occupy a large part of the weight of the entire massage machine M. These are arranged in a housing 32 arranged at the center in the width direction of the backrest B.
On the other hand, the first and second motors 33 and 84 are arranged on one side, and the third motor 102 and the worm speed reducer are arranged on the other side, and they are located at substantially the same height. It is arranged.

With such an arrangement, the center of gravity is not biased toward one end in the width direction of the massage machine M, and the overall weight is balanced. For this reason, the friction between one of the rails C is not excessively increased, and the self-propelled movement of the entire massage machine M can be smoothly performed.

As shown in FIGS. 5 and 9, etc., mutually parallel concave grooves 131, 13 extending in the left-right direction (the width direction of the housing 32) are formed in the front wall 32b of the housing 32.
2 are formed. A half-peripheral portion of the first traveling shaft 123 at the central portion in the axial direction is fitted into one groove 131, and the second traveling shaft 119 is fitted into the other groove 132.
Is fitted in a half-circumferential portion at the axial center.
A cover plate 133 made of sheet metal is fixed to the front wall 32b of the housing 32 with a plurality of screws (fixed parts) 136 inserted from the front.

As shown in FIGS. 1 and 2, the cover plate 133 is preferably a first traveling shaft 123 and a second traveling shaft 123.
Most of the portion of the traveling shaft 119 located between the side plates 22 and 23 is covered. As shown in FIGS. 1, 2 and 9, the cover plate 133 is formed integrally with two shaft fitting portions 134 and 135 extending over the entire length in the width direction.

Each of the shaft fitting portions 134 and 135 has a semicircular cross section.
And covers the half-peripheral portion at the center of the shaft.
19 is fitted over the half-circumferential portion at the center. Projection height G of shaft fitting portions 134 and 135 forward
Is set to be larger than the protruding height H of the head of the screw 136.

Reference numeral 141 in FIGS. 1 to 4 denotes a terminal box attached to the outer surface of the machine casing 21, and 142 in FIG.
Is a machine frame cover screwed to the side plates 22, 23 and the housing 32. As described above, the massage machine M is provided so as to be incorporated in the backrest portion B of the chair, and the front surface (front surface) of the backrest portion B including the pair of massage rollers 69 is rich in flexibility (not shown). It is covered with a backrest cover (not shown). E in FIG. 14 indicates the center line of the backrest B.

In the massage machine having the above-described structure, the first motor 33 for operating the massage massage shaft 52 and the tapping massage shaft 55, the second motor 84 for operating the roller gap adjusting mechanism 95, and the third motor for moving the entire massage machine M are provided. The motor 102 is provided. When the first motor 33 is rotated forward as described above, the drive unit 31
By rotating the tapping massage shaft 55, the pair of massage rollers 69 are given an operation of making a tapping motion. Conversely, when the first motor 33 is rotated in the reverse direction, the massaging massage shaft 52 is rotated by the drive unit 31 so that the pair of massaging rollers 69 can be operated to massage.

Further, when the second motor 84 is normally rotated as described above, the pair of hubs 67 supporting the pair of massage rollers 69 are brought close to each other by the rotation of the width adjusting screw shaft 83, so that the pair of massage rollers The mutual interval A between the pair of massage rollers 69 can be widened by rotating the width adjusting screw shaft 83 when the second motor 84 is reversely rotated.

When the third motor 102 is rotated forward as described above, the entire massage machine M is moved to the backrest C.
, And when the third motor 102 is reversed, the whole massage machine M can be lowered along the shape of the backrest C.

Since the motors 33, 84, and 102 can be controlled independently of each other, a pair of massage rollers 69 are appropriately arranged on the size of the user's body or the part to be massaged to perform a massage or a tap massage. A variety of massage modes can be realized, such as being able to change the width direction position of the pair of massage rollers 69 or the vertical position of the pair of massage rollers 69 while performing the selected massage operation.

The massage machine M includes a first motor 33, and a driving unit 31 for selectively imparting a kneading motion and a hitting motion to a pair of massage rollers 69 by forward / reverse rotation thereof. The rollers are arranged at positions between the rollers 69 and at substantially the same distance from the massage rollers 69.

As described above, the driving unit 31 is
According to the configuration arranged at the substantially central portion in the width direction, when the middle part of the back leaning on the backrest B falls between the pair of spread massage rollers 69, the first
The central portion of the second traveling shafts 123 and 119 in the axial direction may be pushed, but this central portion can be supported by the housing 32 of the drive unit 31. The load at this time is supported by the machine frame 21.

Therefore, the first traveling shaft 123 and the second
The running shaft 119 is supported at three places, that is, at both ends and the center, so that the running shaft 119 is not greatly bent by the weight of the user and its deformation is prevented. In addition, since the cover plate 133 of this embodiment has a size that almost covers the front side of the machine casing 21, the weight acting from the front as described above is substantially equivalent to the two traveling shafts 123 and 119 via the cover plate 133. By dispersing them all over, the curvatures of both traveling shafts 123 and 119 can be further reduced.

Therefore, the safety of the massage machine M can be ensured, and the strength required for the two traveling shafts 123 and 119 can be reduced, so that they can be made thinner. , 119 supporting the ends of the shaft support portions 111 and 112 and the shaft support portion 118, the strength thereof can be reduced and the size can be reduced.

Moreover, the front wall 32b of the drive unit 31
Since the cover plate 133 for supporting the central portions of the two traveling shafts 123 and 119 has a structure in which two shaft fitting portions 134 and 135 are provided by bending, the cover plate 133 has a large strength, and the cover plate 133 has high strength. Can be made thinner.

As described above, the traveling shafts 123 and 119 can be made thinner, and the supporting structure can be made smaller, and the cover plate 133 made of sheet metal can be made thinner.
Thus, the weight of the entire massage machine M can be reduced.

Further, the two shaft fitting portions 134 and 135 provided on the cover plate 133 by bending are fitted with the middle portions of both the running shafts 123 and 119 inside thereof, and are projected forward. As shown in FIG.
3 for fixing the front panel 3 to the front wall 32b of the drive unit 31
36 can be projected forward.

Therefore, when the massage machine M is caused to travel by its self-propelled mechanism 117, the two shaft fitting portions 123, 11
9 prevents the flexible back cover covering the back B from being hooked on the head of the screw 136,
Resistance in running operation can be reduced.

In addition to the low running resistance, the massaging machine M is light in weight, and the running of the running shafts 123 and 119 is small. Rollers 116 and 120 are rail C
And the pinion gears 114 and 115 are prevented from competing with the rack D, so that the entire massage machine M can be smoothly moved.

In addition, the cover plate 1 having the size as described above is used.
In the present embodiment using 33, the hand or the backrest cover is not pushed behind the cover plate 133. Therefore, the backrest cover is not entangled in the massage massage shaft 52 or the like, and the grease applied to the shaft 52 or the like does not stain the backrest cover.

The present invention is not limited to the above embodiment. For example, the concave grooves 131 and 132 of the drive unit 31
May be omitted, and when the protruding height H of the shaft fitting portions 134 and 135 of the cover plate 133 is further increased, the back that falls between the pair of massage rollers 69 when the massage machine M runs by itself, These shaft fitting portions 134, 13
5 can be massaged.

[0079]

As described above in detail, in the massage machine of the present invention, the strength of the bearing structure for supporting the running shaft and both ends thereof by supporting the intermediate portion of the plurality of running shafts on the drive unit is reduced. In combination with the capability, the cover plate for fixing the intermediate portion of the traveling shaft to the drive unit can be made thin, so that the traveling shaft, its shaft support structure, and the cover plate can be made lighter, and thus the whole can be made lighter. . This weight reduction is advantageous for running the entire vehicle.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of an entire massage machine according to one embodiment of the present invention.

FIG. 2 is a perspective view showing the configuration of the entire massage machine according to the embodiment when viewed from the front side.

FIG. 3 is a perspective view showing the configuration of the entire massage machine according to the embodiment when viewed from the rear side.

FIG. 4 is a rear view showing the configuration of the entire massage machine according to the embodiment.

FIG. 5 is a front view partially showing the configuration of the entire massage machine according to the embodiment;

FIG. 6 is a plan view showing the configuration of the entire massage machine according to the embodiment.

FIG. 7 is an exemplary sectional view showing the configuration of a massage massage system of the massage machine according to the embodiment;

FIG. 8 is a sectional view showing a configuration of a tapping massage system of the massage machine according to the embodiment.

FIG. 9 shows a configuration of the massage machine according to the same embodiment as Z in FIG.
Sectional drawing shown along the -Z line.

FIG. 10 is a sectional view showing a configuration of a roller gap adjusting mechanism of the massage machine according to the embodiment.

FIG. 11 is a plan view partially showing the configuration of a drive unit of the roller gap adjusting mechanism according to the embodiment.

FIG. 12 is a front view showing a configuration of a driving unit of the roller gap adjusting mechanism according to the embodiment.

FIG. 13 is a sectional view showing the configuration of the self-propelled mechanism of the massage machine according to the embodiment.

FIG. 14 is a view schematically showing the arrangement of the massage machine according to the embodiment on the backrest of the chair.

[Explanation of symbols]

31 ... drive unit, 32 ... housing,
32b ... front wall, 52 ... massage massage axis, 55 ... hit massage axis, 67 ... hub,
69: Massage roller, 83: Width adjustment screw shaft, 83a, 83b: Screw part, 84: Motor,
85: driven pulley, 89: reduction gear, 9
0: drive pulley, 91: timing belt, 92: mover, 94: interlock
95: roller spacing adjustment mechanism, 96: hub support. 1
11, 112: shaft support portion, 113: protective pipe,
114, 115: pinion gear, 116: running roller, 117: self-propelled mechanism, 118: shaft support, 119: second running shaft, 120: running roller, 133: cover plate, 134, 13
5: Shaft fitting part, 136: Screw (fixed part), 12
3. First traveling axis.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61H 7/00 A61H 23/02

Claims (1)

(57) [Claims] 1. A pair of massage rollers capable of rubbing and tapping, and a width adjusting screw shaft having screw portions that are oppositely screwed at an axial center portion. A roller spacing adjustment mechanism that moves the massage rollers in opposite directions to change the mutual spacing between the massage rollers, and a motor that can rotate forward and reverse, and the forward and reverse rotation of the motor causes the massage rollers to rotate. A drive unit for selectively imparting a kneading motion and a hitting motion, and both ends rotatably supported and arranged parallel to each other on the front side of the front wall of the drive unit, and rotatable to the both ends. And a plurality of traveling shafts, each of which is provided with a traveling roller, wherein the entire traveling direction is orthogonal to the moving direction of the massage roller when adjusting the mutual interval. In the massage machine, the drive unit is arranged between the pair of massage rollers, and a cover plate is fixed to a front wall of the drive unit from a front side thereof, and the cover plate has a total length in the width direction. , A plurality of shaft fitting portions projecting forward and bending are formed, and the two traveling shafts are separately fitted inside the shaft fitting portions, respectively, and an intermediate portion of each traveling shaft is attached to the shaft. A massage machine, wherein the massage unit is supported by the drive unit so as to be sandwiched between a fitting portion and a front wall of the drive unit.