WO2014061686A1

WO2014061686A1 - Massage apparatus

Info

Publication number: WO2014061686A1
Application number: PCT/JP2013/078022
Authority: WO
Inventors: 伊藤　伸一; 洋二正子
Original assignee: オージー技研株式会社
Priority date: 2012-10-17
Filing date: 2013-10-16
Publication date: 2014-04-24
Also published as: EP2910232A1; CN104736122A; EP2910232A4; TW201422220A; JP6048807B2; JP2014079405A

Abstract

[Problem] To reduce the time required for centering work and improve assembly work efficiency for a massage device when supporting a shaft that moves a jet part having a jet nozzle, and to reduce costs without hindering movement of the jet nozzle. [Solution] This massage apparatus comprises: a rotary drive part (11); a shaft (9), one end (9a) of which is rotatably connected to the rotary drive part (11) and is supported by a bearing (27), and the other end (9b) of which extends in one direction inside a liquid tank (1); threaded gears (25A, 25B) disposed on the shaft (9); a jet part that is able to move along the shaft (9) with the threaded gears (25A, 25B), has a jet nozzle at the top, and can be rotated by the rotation of the threaded gears (25A, 25B); and a support mechanism that supports the other end (9b) of the shaft (9) in a non-fixed state.

Description

Massage equipment

The present invention relates to a massage device that massages the neck, trunk, and lower limbs of a human body in a supine posture with jet fluid pressure.

2. Description of the Related Art Conventionally, as a massage device for performing massage on a human body, a massage device using a liquid pressure such as a water pressure sprayed from an ejection port (a spray nozzle) is known. In this massage device, a flexible sheet is stretched over an upper opening of a liquid tank having a substantially rectangular parallelepiped shape, and spray liquid is sprayed from a spray port provided in the liquid tank toward the lower surface of the flexible sheet. By doing so, a massage treatment person lying on a flexible sheet is stimulated to perform treatment (see, for example, Patent Document 1).

The massage device is provided with an ejection port moving mechanism for moving the ejection port in each of the long side and the short side of the liquid tank. The ejection port moving mechanism in the long side direction includes a cart that can travel in the liquid tank and has an ejection port, a female screw body provided in the cart, and a screw threaded to the female screw body. The screw shaft spans in the direction, and a moving motor connected to the screw shaft outside the liquid tank.

On the other hand, the injection port moving mechanism in the short side direction is a worm wheel provided at the lower part of a gear rotatably mounted on the carriage, and is screwed to the worm wheel so as to be extended in the long side direction of the liquid tank. A screw shaft and a rotation motor connected to the screw shaft on the outside of the liquid tank are included.

JP 2003-52782 A

In the conventional massage device, since both ends of the screw shaft are fixedly supported by the bearing unit so as to be rotatable, high accuracy is required for the processing of the screw shaft dimensions and the end of the screw shaft inserted into the bearing unit, If the accuracy of the screw shaft alignment is inferior, the screw shaft will not rotate properly, which may interfere with the smooth running of the carriage, or the power of the rotating motor will not be transmitted reliably to the worm wheel, resulting in gears. It had the problem of adversely affecting the rotation of the.

In addition, if the motor for movement or rotation is continuously driven in a state where the alignment accuracy is inferior, there is a problem that a load exceeding the specified value is applied to the motor, resulting in motor failure due to burning or the like. It was.

Furthermore, it takes a very long time to adjust the centering of the screw shaft during the assembly work in the manufacturing plant of the massage device, which is one of the factors that deteriorate the assembly workability of the massage device. Improvement in sex was also desired.

Further, the screw shaft used for rotating the injection port moving mechanism in the short side direction applies a thrust load applied to the bearing unit connected to the rotation motor on one end side of the screw shaft when the rotation motor is driven. In order to reduce this, the end face on the other end side of the screw shaft is pressed in the direction of the rotating motor with a resin end block, but this causes an increase in the number of parts and causes an increase in cost. In addition, the end block is worn by friction caused by the rotation of the screw shaft, and the pressing force gradually decreases.

In the present invention, the time required for the centering operation of the shaft used for the movement of the injection port is shortened, the assembling workability of the massage apparatus is improved, and the cost can be reduced without hindering the movement of the injection port. The object is to provide a device.

The massaging device of the present invention according to claim 1 is a massaging device for moving and rotating the jetting port of the jet liquid in the liquid tank, and is connected to the rotation driving unit and one end side of the rotation driving unit so as to be rotatable. A shaft that is supported by a bearing and has the other end extending in one direction in the liquid tank, a gear member that is slidably mounted on the shaft and that can rotate integrally with the shaft by the rotation drive unit, An injection portion that is movable along the shaft together with the gear member and has the injection port in the upper portion and is rotatable by the rotation of the gear member, and a support that supports the other end side of the shaft in an unfixed state. And a mechanism.

According to the present invention, the shaft is supported at one end side in a fixed manner, and the other end side is supported by the support mechanism in an unfixed state. Since the massage device can be assembled without taking more time than necessary, the assembly workability can be improved. In addition, according to the present invention, it is not necessary to fix the other end of the shaft as in the conventional structure, and thus a member such as a bearing in which a collar and a bearing required for this fixing are incorporated is not necessary. It is not necessary to excessively increase the processing accuracy of the end surface on the other end side, and it is possible to eliminate the need for precision processing of the end surface, thereby reducing the cost.

The aspect of claim 2 is a mechanism in which the support mechanism supports the other end of the shaft with a clearance between the shaft and the gear member.

In this aspect of claim 2, fine adjustment of the centering of the shaft can be easily performed. In addition, the driving force of the rotational drive unit such as a motor can be reliably transmitted from the shaft to the gear member, which is preferable for smoothly rotating the gear member. In addition, since a load exceeding a specified value is not applied to the rotation drive unit such as a motor, failure of the rotation drive unit such as burnout due to such overload can be reduced.

According to a third aspect of the present invention, the thrust load in the axial direction is suppressed by receiving the bearing supporting the one end side of the shaft in the axial direction by a mounting member attached to the shaft. The one end side includes one end of the shaft and the vicinity thereof. Similarly, the other end side of the shaft includes the other end of the shaft and its vicinity.

In a conventional massaging device, the other end of the shaft is supported by a collar or a bearing, and the end surface of the other end of the shaft is pressed in the axial direction (drive motor side direction) by a resin end block and end bracket member. Thus, the thrust load applied to the shaft is suppressed. However, in the aspect of the third aspect, the attachment member (specifically, the nut) attached to the shaft at one end side of the shaft or in the vicinity thereof is arranged at one end side. Since the thrust load is suppressed by adopting the structure that is received by the bearing, the number of parts can be reduced correspondingly, and the cost can be reduced. Furthermore, it is possible to solve the problem of the conventional structure that the end block made of resin is worn and the pressing force is gradually reduced to eliminate the thrust load suppressing action.

According to a fourth aspect of the present invention, the liquid tank is a liquid tank having a substantially rectangular shape in plan view or a substantially elliptical shape in plan view, and the jetting unit is a pair of two in the short side direction of the liquid tank. In addition, two sets are provided over the long side direction of the liquid tank, and the gear member is disposed on the shaft corresponding to each of the injection units.

In the conventional massage apparatus, if two injection parts are arranged, the shaft centering accuracy is required more than when only one injection part is provided. Although the work time is also expected to increase, the aspect of claim 4 can greatly reduce the time for the adjustment work.

The aspect of Claim 5 is provided with the injection part switching means which switches to either one set or two sets of them with respect to the said 2 sets of said injection parts.

In the aspect of claim 5, for example, when massaging a region (muscle) having a large area of the shoulder or back, the treatment time is obtained by simultaneously injecting the injection liquid from all of the injection ports of each of the two injection units. This makes it possible to achieve an efficient massage. Conversely, when massaging a narrow part such as the neck, it is possible to massage by spraying the injection liquid at a pinpoint to the treatment target part by switching to injection from the injection port of the pair of injection parts It is possible to prevent an unfavorable situation in which an unpleasant feeling is given to the massage recipient by spraying the jet liquid to an unnecessary part.

In the present invention, the time required for the centering operation of the shaft can be shortened, the assembling workability of the massage apparatus can be improved, and the cost can be reduced without hindering the movement of the injection port.

It is a schematic plan view of the massage apparatus which concerns on embodiment of this invention. It is a cross-sectional view which follows the CC line of FIG. FIG. 2 is a partial cross-sectional view taken along line AA in FIG. 1. It is a fragmentary sectional view of the one end side of a shaft. FIG. 3 is a partial cross-sectional view taken along line BB in FIG. 1. It is a principal part enlarged view of FIG. It is a schematic block diagram for injection part switching.

Hereinafter, a massage device according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic plan view of a massage apparatus according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line CC in FIG. FIG. 3 is a partial cross-sectional view taken along line AA in FIG. A partial cross-sectional view along the line A1-A1 in FIG. 1 is the same as FIG. FIG. 4 is a partial cross-sectional view of one end side of the shaft. FIG. 5 is a partial sectional view taken along line BB in FIG. FIG. 6 is an enlarged view of a main part of FIG. FIG. 7 is a schematic configuration diagram for switching the injection unit.

The massage apparatus 100 includes a liquid tank 1, a movable carriage 2, first to fourth injection units 3A to 3D, an injection liquid supply unit 4, a flexible sheet 5, a flexible reinforcing band 6, A carriage moving mechanism 7 and a casing 8 are provided.

The liquid tank 1 has a substantially rectangular shape in plan view or a substantially elliptical shape in plan view, and has an opening 1a on the upper surface thereof to have an internal volume in which a liquid Q such as water is stored. The casing 8 covers the side surface of the liquid tank 1 over the entire circumference.

The movable carriage 2 has rolling wheels 2a1 and 2a2 as shown in FIG. The movable carriage 2 can move horizontally along the long side direction 1b of the liquid tank 1 by rolling the rolling wheels 2a1, 2a2 at the bottom of the liquid tank 1 (see FIG. 1).

The first to fourth injection units 3A to 3D inject the liquid Q as the injection liquid B from the liquid tank bottom side toward the opening 1a. The injection liquid supply unit 4 supplies the injection liquid B to the first to fourth injection units 3A to 3D.

The flexible sheet 5 is made of a rubber sheet material, and is attached to the liquid tank 1 so as to cover the opening 1a. A massage recipient (not shown) makes the treatment site abut on the upper surface of the flexible sheet 5. Boarding is possible in a sitting state.

The flexible reinforcement band 6 is made of a sheet-like or net-like member, and is laid on the opening 1 a along the short side direction that intersects the long side direction 1 b of the liquid tank 1 on the upper side of the flexible sheet 5. ing. The flexible reinforcement band 6 is provided at a site where the massage recipient's buttocks abuts when the massage recipient gets on and off the flexible sheet 5.

The injection liquid supply unit 4 includes an injection liquid generation unit 12 and a bogie internal flow path 26. The injection liquid generation unit 12 includes a liquid absorption pump unit 13 and bent pipes 14 (14a, 14b). The liquid absorption pump unit 13 absorbs the liquid Q from the liquid tank 1 and pumps it into the injection liquid B. The

bent pipes

14 a and 14 b pressure-feed the injection liquid B sucked by the liquid suction pump unit 13 to the movable carriage 2.

The in-car flow path 26 is provided at the bottom 2 b of the mobile car 2. The in-trolley channel 26 is formed by sealing the bottom 2b of the movable carriage 2 in a liquid-tight manner. The carriage inner passage 26 is connected to the

bent pipes

14a and 14b. It should be noted that the inner passage 26 may be provided at any position as long as it is a gap inside the movable carriage 2. In the present embodiment, the in-cart channel 26 is provided at the bottom 2b of the mobile cart 2, but this is only an example.

The first to fourth injection units 3A to 3D are mounted on the movable carriage 2. 3A of 1st injection parts and the 2nd injection part 3B become a group structure which mutually interlock | cooperates. The third injection unit 3C and the fourth injection unit 3D have a set configuration that is interlocked with each other. The first to fourth injection sections 3A to 3D respectively include first to fourth injection shaft sections 20A to 20D, first to fourth injection section main bodies 21A to 21D, and injection nozzles 22A to 22D. , Respectively.

The first to fourth injection shaft portions 20A to 20D are installed and arranged on the movable carriage 2 with the axis being vertical. Specifically, the first to fourth injection shaft portions 20A to 20D are erected on the ceiling surface 26a of the bogie inner passage 26. Here, the first and second injection shaft portions 20 A and 20 B are arranged with the facing direction α in a direction (short side direction) orthogonal to the long side direction 1 b of the liquid tank 1. Similarly, the third and fourth injection shaft portions 20 C and 20 D are arranged with the facing direction α in the direction orthogonal to the long side direction 1 b of the liquid tank 1.

A first rotary cylinder 18A is fitted on the outer peripheral side of the first injection shaft portion 20A so as to be coaxial with the first injection shaft portion 20A. The first rotating cylinder 18A is mounted coaxially and relatively rotatably with respect to the first injection shaft portion 20A via bearings 19 at both ends. Similarly, second to fourth rotary cylinders 18B to 18D are provided on the outer peripheral side of the second to fourth injection shaft portions 20B to 20D via the bearings 19 and the second to fourth injection shaft portions 20B to 20D. The outer fitting arrangement is coaxial and relatively rotatable. A first connecting gear 23A is coaxially and integrally attached to the upper end of the first rotating cylinder 18A. Similarly, second to fourth coupling gears 23B to 23D are coaxially and integrally attached to the upper ends of the second to fourth rotating cylinders 18B to 18D.

The first connecting gear 23A and the second connecting gear 23B mesh with each other and are interlocked. Similarly, the third connecting gear 23C and the fourth connecting gear 23D are interlocked with each other by meshing with each other.

The first injection unit main body 21A has an oval shape in plan view, and is attached to the upper surface of the first connecting gear 23A. The first injection unit main body 21A is attached to the first connection gear 23A in a rotationally integrated manner with its main shaft coaxial with the first connection gear 23A. Similarly, the second to fourth injection section main bodies 21B to 21D have an oval shape in plan view and are attached to the upper surfaces of the second to fourth connection gears 23B to 23D. The second to fourth injection section main bodies 21B to 21D are attached to the second to fourth connection gears 23B to 23D in a rotationally integrated manner with their main axes being coaxial with the second to fourth connection gears 23B to 23D. .

The injection nozzles 22A to 22D are mounted on the upper surfaces of the first to fourth injection unit main bodies 21A to 21D. The spray nozzles 22A to 22D have a function of spraying the liquid Q as the spray liquid B from the bottom of the liquid tank 1 toward the opening 1a.

In the first to fourth injection shaft portions 20A to 20D, in-axis flow paths 20Aa to 20Da are formed across both ends in the axial direction. Inside the first to fourth injection unit bodies 21A to 21D, injection unit flow paths 21Aa to 21Da are formed.

The lower ends of the in-shaft channels 20Aa to 20Da communicate with the bogie channel 26. The upper ends of the in-axis passages 20Aa to 20Da communicate with the in-injection passages 21Aa to 21Da. The in-injection flow paths 21Aa to 21Da are connected in communication with the injection nozzles 22A to 22D. As a result, the injection nozzles 22A to 22D are in flow communication with the bogie internal flow path 26 via the in-injection flow paths 21Aa to 21Da and the in-axis flow paths 20Aa to 20Da.

First to fourth coupling gears 23A to 23D are formed on the lower surfaces of the first to fourth injection unit bodies 21A to 21D. The first connecting gear 23A and the second connecting gear 23B mesh with each other and are interlocked. The third connecting gear 23C and the fourth connecting gear 23D are interlocked with each other by meshing with each other.

A first passive gear 24A made of a screw gear is formed on the peripheral surface of the first rotating cylinder 18A. A first screw gear 25A (gear member) meshes with and is interlocked with the first passive gear 24A. The axial center of the first screw gear 25A is horizontally arranged. The first screw gear 25A is formed on the outer peripheral surface of the first nut 30A. The first nut 30A is inserted into the shaft 9 having a rectangular cross section so as to be slidable.

A second passive gear 24B made of a screw gear is formed on the peripheral surface of the third rotating cylinder 18C. A second screw gear 25B (gear member) meshes with and is interlocked with the second passive gear 24B. The axis of the second screw gear 25B is horizontally arranged. The second screw gear 25B is formed on the outer peripheral surface of the second nut 30B. Similar to the first nut 30A, the second nut 30B is slidably inserted through the shaft 9 having a rectangular cross section.

The carriage moving mechanism 7 includes a shaft 9, a chain drive unit 10, and a rotation drive unit 11. The shaft 9 is horizontally arranged on the bottom of the liquid tank 1 along the long side direction 1b. The rotation drive unit 11 is arranged on one end side of the bottom of the liquid tank 1. As shown in FIG. 4, the rotation drive unit 11 includes a drive motor 11 a formed of a stepping motor provided outside the liquid tank 1 and a motor shaft 11 b, and one end side 9 a of the shaft 9 is a motor of the rotation drive unit 11. The shaft 9b is interlocked and connected to the shaft 11b by a connecting mechanism (shaft coupling or the like) M, whereby the shaft 9 is arranged at the bottom of the liquid tank 1 along the long side direction 1b and rotatably driven by the rotation driving unit 11. .

The shaft 9 guides the movable carriage 2 along the long side direction 1b so that it can be repeatedly moved linearly as follows. That is, the first and second passive gears 24A and 24B and the first and second screw gears 25A and 25B of the first and

second nuts

30A and 30B are provided on the upper portion of the movable carriage 2. ing. The first and third rotary cylinders 18A and 18C having the first and second passive gears 24A and 24C are installed on the movable carriage 2 so as to be rotatable relative to each other with the axis being vertical.

The first and second screw gears 25A and 25B mesh with the first and second passive gears 24A and 24B in a state where the axis is horizontal and the axis coincides with the axis of the shaft 9. . A coupling hole 30Aa having a shape equivalent to the cross-sectional shape of the shaft 9 is formed in the shaft center of the first nut 30A. Similarly, a connection hole 30Ba having a shape equivalent to the cross-sectional shape of the shaft 9 is formed in the shaft center of the second nut 30B.

The other end 9b of the shaft 9 is disposed through the connection holes 30Aa and 30Ba of the first and

second nuts

30A and 30B. As a result, the first and

second nuts

30A and 30B can be repetitively linearly moved along the axial direction with respect to the shaft 9 and are interlocked and linked to the shaft 9 in an integrated manner. . At the same time, the other end 9b of the shaft 9 is supported in an unfixed state as will be described later.

The chain drive unit 10 includes a drive motor 10a, a drive gear 10b, a driven gear 10c, and a chain 10d. The drive gear 10 b and the driven gear 10 c are arranged along a direction parallel to the shaft 9. The drive gear 10b is rotationally driven by the drive motor 10a. The chain 10d is spanned between the drive gear 10b and the driven gear 10c, and both ends of the chain 10d are connected to the movable carriage 2. When the drive gear 10b is rotated by the drive motor 10a, the chain 10d spanned between the drive gear 10b and the driven gear 10c moves linearly in parallel with the axial direction of the shaft 9, and thereby the both ends of the chain 10d. In a state in which the moving carriage 2 connected to is guided by the shaft 9, the carriage 2 is repeatedly moved along the long side direction 1 b.

As shown in FIGS. 5 and 6, brackets 31 A and 31 B having through-holes in the axial direction are provided on the ceiling surface 26 a of the in-car flow path 26 in the mobile carriage 2 of the first and second nuts 30 A and 30 B. It is fixed to the movable carriage 2 on both sides in the axial direction, and the

bushes

32A, 32B are fixed on both sides in the axial direction through the through holes of the

brackets

31A, 31B on both sides in the axial direction.

The

bushes

32A and 32B have flanges 32Aa and 32Ba in the radial direction and cylindrical portions 32Ab and 32Bb in the axial direction. The

bushes

32A and 32B have their flanges 32Aa and 32Ba positioned and fixed between the inner side surfaces of the

brackets

31A and 31B and the outer side surface of the nut main body 30Ab of the first nut 30A.

The first nut 30A includes a nut body 30Ab and nut cylinders 30Ac and 30Bc extending in a cylindrical shape in the axial direction from both side surfaces of the nut body 30Ab.

The inner diameters of the cylindrical portions 32Ab and 32Bb of the

bushes

32A and 32B are larger than the outer diameters of the nut cylindrical portions 30Ac and 30Bc of the first nut 30A. Therefore, there are

clearances

33A and 33B between the cylindrical portions 32Ab and 32Bb of the

bushes

32A and 32B and the nut cylindrical portions 30Ac and 30Bc of the first nut 30A. The other end side 9b of the shaft 9 is supported with

clearances

33A and 33B. Thereby,

bracket

31A, 31B and

bush

32A, 32B comprise the support mechanism of the other end side 9b of the axis | shaft 9. As shown in FIG.

Although not shown, the second nut 30B in which the second screw gear 25B is formed on the outer peripheral surface has the same structure as the first nut 30A and is fixed to the movable carriage 2 on both sides in the axial direction. The

bushes

32A and 32B are fixed on both sides in the axial direction through the through holes of the

brackets

31A and 31B on both sides in the axial direction, thereby constituting a support mechanism for the other end side 9b of the shaft 9.

As shown in FIG. 4, one end side 9a of the shaft 9 is inserted into the through hole 1e of the bearing bracket 1d erected on the bottom wall 1c of the liquid tank 1, and is rotated by a bearing 27 disposed in the through hole 1e. Thrust load in the direction of the rotation drive unit 11 can be suppressed by a seat plate 28, a toothed washer 29, and a nut 41 that are fixedly supported and attached to the side surface of the bearing bracket 1d. .

Thus, the shaft 9 is fixedly supported at one end side 9a by the bearing 27, while the other end side 9b is supported in an unfixed state by the support mechanism.

Next, the operation of the massage device 100 having the above configuration will be described. A massage recipient touches the treatment site on the upper surface of the flexible sheet 5 of the massage apparatus 100 and sits down (for example, lying down). In this state, a massage recipient or a massage treatment attendant turns on a switch for starting the operation of the massage apparatus 100.

Then, the liquid absorption pump unit 13 is driven to absorb the liquid Q from the liquid tank 1, pressurize the liquid Q that has been absorbed into the injection liquid B, and then the generated injection liquid B is bent. It is pumped to the carriage inner passage 26 of the moving carriage 2 via 14a and 14b. The injection liquid B pumped to the carriage inner passage 26 passes through the in-shaft passages 20Aa to 20Da and the injection portion inner passages 21Aa to 21Da to the injection nozzles 22A to 22D of the first to fourth injection portions 3A to 3D. It is further pumped.

Each of the injection nozzles 22A to 22D injects the injected injection liquid B toward the liquid Q in the liquid tank 1 toward the opening 1a. The sprayed liquid B that has been sprayed strikes the back surface of the flexible sheet 5 and then diffuses into the liquid Q in the liquid tank 1. At that time, the flexible sheet 5 is partially bent and deformed upward by the injection of the spray liquid B, and massages the body surface part of the massage recipient located at the bent sheet part.

While the jet liquid B is being jetted as described above, the drive motor 10a of the chain drive unit 10 arbitrarily rotates in the forward and reverse directions, so that the movable carriage 2 repeatedly moves linearly along the long side direction 1b.

At this time, the moving carriage 2 is guided in its linear movement by the connection holes 30Aa, 30Ba of the first and

second nuts

30A, 30B being inserted into the shaft 9. As a result, the injection nozzles 22A to 22D of the first to fourth injection unit main bodies 21A to 21D mounted on the movable carriage 2 repeatedly move linearly.

Further, in this state, the rotation drive unit 11 drives the shaft 9 to rotate forward and backward, so that the first and

second nuts

30A and 30B (first and second screw gears 25A and 25B) are driven by the shaft 9. It is rotated forward and reverse.

Then, the first and second passive gears 24A and 24B linked to the first and second screw gears 25A and 25B on the outer peripheral surfaces of the first and

second nuts

30A and 30B are rotationally driven, thereby The first and third rotary cylinders 18A and 18C rotate. Accordingly, the first and third connection gears 23A and 23C and the first and third injection unit

main bodies

21A and 21C rotate and are further connected to the first and third connection gears 23A and 23C. 2,

4th connection gear

23B, 23D and 2nd, 4th injection part

main body

21B, 21D rotate. The first and third injection unit

main bodies

21A and 21C and the second and fourth injection unit

main bodies

21B and 21D rotate in opposite directions, and accordingly, the first to fourth injection unit main bodies 21A. The injection nozzles 22A to 22D of 21 to 21D move in the liquid tank 1 while drawing a complicated movement locus along the long side direction 1b. As a result, the massage recipient is carefully and carefully massaged by the jet liquid B ejected by the jet nozzles 22A to 22D that move while drawing a complicated movement trajectory.

At this time, the first and third rotary cylinders 18A and 18C and the second and fourth

rotary cylinders

18B and 18D rotate in directions opposite to each other. As a result, the first to fourth injection unit main bodies 21A to 21D rotate, and the injection nozzles 22A to 22D attached to the first to fourth injection unit main bodies 21A to 21D further perform the first to fourth injections. It rotates around the axis of the main parts 21A to 21D.

The injection nozzles 22A to 22D that have undergone the above repetitive linear movement / repetitive rotation movement move in the liquid tank 1 while drawing a complicated movement locus along the long side direction 1b. As a result, the massage recipient is carefully and carefully massaged by the jet liquid B ejected by the jet nozzles 22A to 22D that move while drawing a complicated movement trajectory.

In the present embodiment, since the one end side 9a of the shaft 9 is fixedly supported by the bearing 27 and the other end side 9b is supported in the non-fixed state, the shaft 9 is assembled during the assembly operation of the massage device 100. Since the massage apparatus 100 can be assembled without requiring more time than necessary for the centering adjustment work, the assembling workability can be improved. Therefore, in the present embodiment, it is not necessary to fix the other end side of the shaft 9 unlike the conventional structure, so that a member such as a bearing in which a collar and a bearing required for the fixing are incorporated is not necessary. It is possible to reduce the processing accuracy of the end face on the other end side of the slab, or to eliminate the need for precise processing of the end face, and to reduce the processing cost thereof.

Further, the bearing 27 on the one end side 9a of the shaft 9 is received in the axial direction by the seat plate 28, the toothed washer 29, and the nut 41 (attachment member) attached to the shaft 9, so that A thrust load acting in the direction of the rotation drive unit 11 can be suppressed. Thereby, while supporting the other end side of the shaft with a collar and a bearing, by pressing the end surface on the other end side of the shaft in the axial direction (drive motor side direction) with the members of the resin end block and end bracket, Unlike the conventional case where the thrust load applied to the shaft is suppressed, the number of parts can be reduced, the cost can be reduced, and the resin end block is worn as in the conventional case, and the pressing force gradually decreases. The problem that the thrust load suppressing action is lost can also be solved.

Further, in the present embodiment, as shown in FIG. 7, each of the first to fourth injection units 3A to 3D includes two first and

second injection units

3A and 3B in the short side direction of the liquid tank 1. A pair, a pair of third and

fourth injection units

3C and 3D, respectively, and a pair, and a set of these first and

second injection units

3A and 3B over the long side direction of the liquid tank 1, Two sets of third and

fourth injection units

3C and 3D are provided in the long side direction.

Therefore, the number of the first to fourth injection nozzles 22A to 22D is set to one set of the first and

second injection units

3A and 3B or one set of the third and

fourth injection units

3C and 3D, or the first, There is provided an injection unit switching means for switching to one of two sets of the

second injection units

3A and 3B and the third and

fourth injection units

3C and 3D. This injection unit switching means can also be referred to as injection port number switching means for switching between two or four injection nozzles (injection ports).

That is, the liquid suction pump unit 13 sucks the liquid Q from the liquid Q suction port 13a to form the jet liquid B, and then ejects the jet units 3A to 3D from the two

discharge ports

13b and 13c via the

bent pipes

14a and 14b. The jetting liquid B is discharged. At that time, for example, the electromagnetic valve 40 is provided as the injection unit switching means in the middle of one bent pipe 14b.

When the number of the injection nozzles 22A to 22D of the first to fourth injection units 3A to 3D is two, the

injection nozzles

22C and 22D of the third and

fourth injection units

3C and 3D are closed when the electromagnetic valve 40 is closed. The jet liquid B is jetted from one set. When the number of the injection nozzles 22A to 22D is four, when the solenoid valve 40 is opened, the injection liquid B is injected from the two sets of the injection nozzles 22A to 22D of the first to fourth injection units 3A to 3D. . In this way, for example, when massaging a region (muscle) having a large shoulder or back area, the spraying liquid B is sprayed simultaneously from the two pairs of spray nozzles 22A to 22D, thereby shortening the treatment time. Efficient massage can be realized. Conversely, when massaging a narrow part such as the neck, it is possible to massage by spraying the injection liquid B to the treatment target part by switching to a pair of

injection nozzles

22C, 22D, It is possible to prevent an unfavorable situation in which the spray liquid B is sprayed to an unnecessary part and the massage recipient is uncomfortable.

In the present embodiment, the shaft 9 has a rectangular cross section, but is not limited thereto, and may be a polygon such as a rectangle, a hexagon, or an octagon. A worm gear may be used instead of the screw gear.

Further, the shaft 9 of the present embodiment has a rectangular cross section, but is not limited thereto, and may be a circular shaft having a circular cross section and having a groove formed in the axial direction. It may be a nut having a protrusion that can be fitted into the groove. Further, the shaft 9 may be a spline shaft and the nut may be a spline nut. Moreover, you may use a motorized valve instead of an electromagnetic valve as an injection part switching means.

DESCRIPTION OF SYMBOLS 1 Liquid tank 1a Opening 1b Long side direction 2 Carriage 3A-3D 1st-4th injection part 5 Flexible sheet 7 Carriage moving mechanism 8 Casing 9 Shaft 9a One end side 9b Other end side 10 Chain drive part 11 Rotation drive Part 12 injection liquid generating part 13 liquid suction pump parts 21A to 21D first to fourth injection part main bodies 22A to 22D injection nozzles 23A to 23D first to fourth coupling gears 24A, 24B first and second

passive gears

25A, 25B First and second screw gears (gear members)
27 Bearing 28 Seat plate 29 Toothed washer 30

Nuts

30A and 30B First and

second nuts

31A and 31B

Brackets

32A and

32B Bushings

33A and 33B Clearance 40 Solenoid valve 41 Nut 100 Massage device M Connection mechanism Q Liquid B Injection liquid

Claims

A massage device for moving and rotating the spray nozzle in the liquid tank,
A rotation drive unit;
A shaft whose one end side is rotatably connected to the rotation drive unit and supported by a bearing, and the other end side extends in one direction in the liquid tank;
A gear member that is slidably mounted on the shaft and can rotate integrally with the shaft by rotational driving of the rotational driving unit;
An injection unit that is movable along the shaft together with the gear member, and that has the injection port at the top and is rotatable by the rotation of the gear member;
A support mechanism for supporting the other end of the shaft in an unfixed state;
Having
A massage device characterized by that.
The support mechanism is a mechanism that supports the other end side of the shaft with a clearance between the shaft and the gear member.
The massage apparatus according to claim 1, wherein:
By receiving the bearing supporting the one end side of the shaft in the axial direction by an attachment member attached to the shaft, the thrust load in the axial direction is suppressed.
The massage apparatus according to claim 1 or 2, wherein
The liquid tank is a liquid tank having a substantially rectangular shape in plan view or a substantially elliptical shape in plan view.
The jetting unit is a pair of two pairs in the short side direction of the liquid tank, and two sets are provided over the long side direction of the liquid tank, and the shaft corresponds to the jetting unit of each set. And the gear member is disposed,
The massage device according to any one of claims 1 to 3, wherein
With respect to the two sets of the injection units, provided with injection unit switching means for switching to either one or two of them,
The massage apparatus according to claim 4, wherein