JP4424270B2 - Massage machine - Google Patents

Description

  The present invention relates to a massage machine capable of performing a massage operation including a hitting operation with a treatment element.

  As a massage machine, there is a massage machine that allows a treatment element to perform a hitting massage operation. In this device, the other end of the link having one end connected to the rotationally driven crankshaft is connected to a member provided with a treatment element, so that the link swings on the treatment element as the crankshaft rotates. In this way, a hitting operation can be obtained by the swinging operation.

However, if the bearing that receives the crankshaft in the link is clearance-fitted to the crankshaft for reasons such as allowing the width position of the treatment element to be changed, the clearance between the bearing and the crankshaft is due to clearance tolerance. There is a backlash between them, and this backlash tends to increase the operating noise.
JP 2004-357938 A

  The present invention was invented in view of the above-described conventional problems, and an object of the present invention is to provide a massage machine that can prevent an increase in operating noise due to the connecting portion between the crankshaft and the link. It is.

In order to solve the above problems, a massage machine according to the present invention comprises a massage treatment element, a crankshaft that is rotationally driven, one end connected to the crankshaft via a bearing, and the other end on the treatment element side. And a second link linked to the link in a swingable manner, wherein the second link is slidably connected to the link. And a link for biasing the first bearing of the link and the second bearing of the second link in opposite directions. has a first characteristic, as well as extending the end of the crankshaft side in one axial direction of the crankshaft in the link, the that is interposed an elastic member between the bearing outer periphery and the link 2 The above axis With an elastic member is interposed between the outer link has a third feature that uses a reduced diameter free ones as a bearing.

  In the case of biasing the bearing, it is preferable that a gap generated on the side opposite to the contact portion with the crankshaft by the biasing is a grease holding portion.

According to the first feature of the present invention , only a part of the bearing is supported in a state where it is always in contact with the crankshaft due to the bias of the spring, and at the same time, an operating noise is generated to eliminate rattling. Can be small.

According to the second feature, both ends in the axial direction of the bearing can be always brought into contact with the crankshaft, rattling can be eliminated, and operation noise can be reduced.

Further, according to the third feature, since the bearing can be reduced in diameter by an elastic body and can be brought into close contact with the crankshaft, it is possible to eliminate the rattling and reduce the operating noise.

Hereinafter, the present invention will be described based on an embodiment shown in the accompanying drawings. In the illustrated example, the massage machine 1 includes a mechanism block 13 in a reclining backrest 12 standing up from a rear portion of a chair seat 11 as shown in FIG. The treatment person M is arranged so as to be able to run freely in the vertical direction of the backrest 12, and the user M sits on the seat portion 11 and leans against the backrest 12 and protrudes from the mechanism block 13 to the front side of the backrest 12 (described later) The kneading balls 48 and the gripper 62) can be subjected to mechanical massage operations such as a hitting operation and a kneading operation.

  As shown in FIGS. 8 and 9, the mechanism block 13 includes a treatment element unit 3 having the treatment element in a substantially box-shaped frame, and a direction in which the treatment element unit 3 is projected and retracted into the human body, and a width. It is configured to be equipped with a strength driving unit 15, a width driving unit 14, a vertical driving unit 16, and a tapping driving unit 17 for performing a tapping operation on the treatment element.

Between the side plates 13a and 13a of the frame of the mechanism block 13, as shown in FIG. The width drive shaft 19 is connected to a width drive motor 20 fixed to a frame via a width drive pulley 21a, a width drive belt 21b, and a width pulley 21c, and the outer periphery is mutually reversely threaded. Male threads are provided. And the feed nuts 35 and 35 of the treatment element units 3 and 3, which will be described later, are respectively screwed into the left and right male screws of the width drive shaft 19 constituting the width drive section 14, and the width drive shaft 19 rotates about the axis. At this time, the pair of treatment element units 3 and 3 move toward and away from each other, that is, move in the width direction (left-right direction).

Fan-shaped strong and weak driving gears 18 shown in FIGS. 10 and 11 are respectively provided on both outer sides of the movable range of the treatment element unit 3 in the width direction. A transmission gear 25a for transmitting the rotation of the strength driving motor 23 of the strength driving portion 15 described later meshes with the strength driving gear 18 respectively. Two width drive support shafts 22 parallel to the width drive shaft 19 are installed between the left and right strong and weak driving gears 18. These width driving support shafts 22 are inserted into through holes 38 a provided in the pair of treatment element units 3.

  The strength drive unit 15 is configured to rotationally drive the strength drive shaft 25 supported by the strength drive motor 23 rotatably on the frame of the mechanism block 13 via the transmission mechanism in the strength gear box 24. A pair of transmission gears 25 a provided at both ends mesh with the left and right strong and weak driving gears 18. Therefore, if the strong / weak drive motor 23 is driven forward or reverse, the right and left strength drive gears 18 rotate about the width drive shaft 19 through the transmission gear 25a. At this time, the treatment element unit 3 in which the two width driving support shafts 22 laid between the right and left strength driving gears 18 are inserted is centered on the width driving shaft 19 as the strength driving gear 18 rotates. By rotating, the amount of protrusion of the treatment element provided in the treatment element unit 3 toward the human body (the amount of protrusion in the front-rear direction) changes. That is, the treatment element of the treatment element unit 3 moves in an up-down direction and a front-rear direction by performing an arc motion with the width drive shaft 19 as a rotation center, and the strength of the treatment element against the user M changes.

  The vertical drive unit 16 provided in the mechanism block 13 transmits the rotation of the vertical drive motor 26 to the vertical drive shaft 28 via a transmission mechanism provided in the vertical gear box 27. A pinion 28a is fixed and a roller 28b is rotatably attached. In addition, guide shafts 81 are provided at lower portions on both sides of the frame. On the other hand, in the backrest 12 of the massage machine 1, vertical guide rails (not shown) are provided on left and right outer frame frames (not shown), and the vertical rollers 28b and guides are provided on the vertical guide rails. The shaft 81 is mounted so as to be movable up and down, and is engaged with a vertical pinion 28a in a rack (not shown) attached to a vertical guide rail, and the mechanism block 13 is moved up and down by forward or reverse drive of the vertical drive motor 26. Moving.

As shown in FIGS. 12 and 13, the pair of left and right treatment element units 3 includes a width feed case 33 having a feed nut 35 screwed into the pair of male screws of the width drive shaft 19 and the width feed case 33. The fixed portion 31 including a fixed width arm 36 and a movable portion 32 provided so as to be rotatable with respect to the fixed portion 31. The width-feed case 33 having a substantially box shape in the fixed portion 31 has a width. The feed shaft 35 is provided with an insertion hole 34 through which the drive shaft 19 is inserted, and one side portion in the width direction is larger than the case portion of the width feed case 33 in a side view. A width arm 36 is fixed to the plate 33a.

In the present embodiment, the width arm 36 is a plate having a substantially U-shape, and includes an insertion hole in which the width drive shaft 19 is loosely fitted at a position corresponding to the insertion hole 34 of the width feeding case 33. A state of being fixed to the plate 33a on the side surface portion of the width feed case 33 by a fixing tool 37 made of a plurality of screws and the like and protruding forward or in the vertical direction (forward and upward in this embodiment) from the width feed case 33 It has become. Further, the side plate 33 a and the width arm 36 of the width feeding case 33 are provided with through holes 38 a and 38 b into which the two width driving support shafts 22 are inserted. As a result, as described above, when the strength driving gear 18 rotates about the width driving shaft 19, the fixed portion 31 also rotates integrally with the strength driving gear 18 and the width driving support shaft 22.

  The movable portion 32 includes a hitting operation plate portion 39 provided to be rotatable with respect to the width arm 36 of the fixed portion 31, and a treatment element fixing arm provided to be slightly rotatable with respect to the hitting operation plate portion 39. 40 and a shoulder gripping portion 41 provided so as to be swingable with respect to the treatment element fixing arm 40.

The hitting plate portion 39 is pivotally supported by the width arm 36 of the fixed portion 31 so as to be rotatable by a projecting shaft 42. In this embodiment, the hitting plate portion 39 projects laterally from the upper end portion of the width arm 36. A projecting shaft 42 is provided, a fitting hole 43 into which the projecting shaft 42 is inserted is drilled in the rear end portion of the tapping operation plate portion 39, and the projecting shaft 42 is covered with the tapping operation plate portion 39 via a bush 47. The fitting hole 43 is fitted. As a result, the front end portion of the hitting operation plate portion 39 protruding from the width arm is rotatable with respect to the width arm 36 about the protruding shaft 42. The hitting operation plate 39 is provided with a pin insertion hole through which a pin 53 of the link 52 described later is inserted, and a swinging support for pivotally supporting the treatment element fixing arm 40 and the shoulder gripping portion 41. A moving fulcrum shaft 45 is projected.

  The swing fulcrum shaft 45 protrudes toward the side opposite to the side where the width arm 36 is attached to the front portion (that is, the front end portion) of the hitting plate portion 39 from the fitting hole 43. is there. On the other hand, the treatment element fixing arm 40 is provided with a fulcrum shaft insertion hole 46 into which the oscillating fulcrum shaft 45 is inserted at the rear end portion, and the oscillating fulcrum shaft 45 of the hitting operation plate portion 39 via the bush 47. Since the fulcrum shaft insertion hole 46 of the treatment element fixing arm 40 is fitted to the treatment element fixing arm 40, the treatment element fixing arm 40 can be rotated with respect to the hitting operation plate portion 39. The width arm 36 and the treatment element fixing arm 40 are respectively disposed on both surfaces of the hitting operation plate portion 39 so as to be rotatable with respect to the hitting operation plate portion 39.

The treatment element fixing arm 40 is a plate-like member having a substantially L-shaped side view in which one end protrudes forward and the other end protrudes downward, and a fulcrum shaft insertion hole 46 is formed at the rear end near the upper end. Is perforated, and the swinging fulcrum shaft 45 of the hitting plate portion 39 is inserted as described above. The treatment element fixing arm 40 is provided with kneading balls 48 (48a, 48b), which are treatment elements, on one side projecting forward and the other end projecting downward. Here, as the kneading balls 48, roller-shaped ones whose width direction is the rotation axis are used.

  The treatment element fixing arm 40 restricts the rotation so as to be slightly rotatable with respect to the hitting operation plate portion 39 and reduces the impact at the time of rotation. This point will be described above. Further, the fitting hole 43 of the hitting operation plate portion 39 is fitted on the protruding shaft 42 of the width arm 36 of the fixing portion 31, and this protruding shaft 42 protrudes further than the hitting operation plate portion 39 to fix the treatment element. A notch 49 having a substantially U-shape is formed in a portion corresponding to the protruding shaft 42 of the treatment element fixing arm 40. The tip of the projecting shaft 42 is located in the notch 49 and a cushion material 42 a is provided on the outer periphery of the projecting shaft 42. For this reason, when the treatment element fixing arm 40 rotates about the swing fulcrum shaft 45 with respect to the hitting operation plate portion 39, the inner edge of the notch 49 of the treatment element fixing arm 40 is interposed via the cushion material 42a. When the projecting shaft 42 abuts on the pivot range and the cushioning member 42a is provided, the treatment element fixing arm 40 reaches the limit of the pivoting range (that is, when the cushioning member 42a abuts). ) Can be weakened.

  Next, a rubbing operation by the massaging balls 48 and a hitting operation by the massaging balls 48 will be described. First, regarding the kneading operation by the massaging balls 48 of the treatment element, the mechanism block 13 is moved up and down by the vertical drive unit 16 so as to place the kneading balls 48 in a desired vertical position, and the kneading balls 48 are moved in the desired left and right positions. The treatment element unit 3 is driven in the width direction by the width driving unit 14 so as to be arranged in the width direction. Then, in order to press the treatment part of the user M who is sitting on the seat 11 of the chair and leaning against the backrest 12 with the kneading balls 48, the strength driving part 15 is driven to rotate the treatment element unit 3 forward. By rotating the protruding treatment element unit 3 downward, the upper kneading balls 48 are pushed obliquely downward and forward with respect to the treatment site, or by rotating the treatment element unit 3 upward, The kneading balls 48 are pressed toward the treatment site obliquely upward and the left and right movements by the width driving unit 14 are simultaneously added to these operations, thereby performing a kneading operation.

The tapping drive unit 17 that performs tapping operation swings the movable unit 32 in the treatment element unit 3 with respect to the fixed unit 31, and includes a tapping drive motor 50, a tapping drive crankshaft 51, and a link 52. Yes. Further, between the left and right intensity drive gear 18, in addition to the width drive shaft 19 and the width drive shaft 22, Yes and it bridged the crankshaft 51 while bridging the motor mounting member, a motor mounting member The hitting drive motor 50 for rotating the crankshaft 51 is attached. The crankshaft 51 to which the rotation of the tapping drive motor 50 is transmitted via the drive pulley 55, the belt 56, and the pulley 54 is provided with eccentric portions 57 having different eccentric directions on the left and right sides. Each end of 52, 52 is fitted so as to be movable in the width direction.

  The other end of each link 52 is connected to a hitting operation plate portion 39 of the movable portion 32 of the treatment element unit 3 by a pin 53. The link 52 moves in the width direction along the eccentric portion 57 of the tapping drive crankshaft 51 as the treatment element unit 3 moves in the width direction. When the eccentric portion 57 rotates eccentrically by rotating the hitting drive motor 50, the hitting operation plate portion 39 and the treatment element fixing arm 40 swing around the protruding shaft 42 and hit by the kneading balls 48. Action is taken.

  In this massage machine 1, in addition to the kneading operation and the hitting operation by the kneading balls 48, the kneading operation by the kneading balls 48 and the grasping element 62 of the shoulder gripping portion 41 is also possible. Here, the shoulder gripping portion 41 fixes the swinging arm 61 and the gripper 62 provided at the tip thereof, the airbag 63 for driving the swinging arm 61, and the hitting operation plate portion 39. And an airbag fixing part 64 for the purpose.

  The swing arm 61 is substantially rod-shaped or substantially plate-shaped, and its one end is pivotally supported by the swing fulcrum shaft 45 of the hitting operation plate 39 described above. A gripper 62 is provided on the front side of the other end portion to grip the shoulder of the user M, and one end portion of the airbag 63 is attached to the rear side of the swing arm 61. A return spring 65 is provided at the pivotal support portion of the swing arm 61 with respect to the swing fulcrum shaft 45 to urge the end of the swing arm 61 on the rotating side so as to be accommodated rearward.

  The airbag 63 has a bellows shape that can be inflated and contracted. The airbag 63 is connected to the air pump 71 via a hose 70, and the front end is attached to the swing arm 61. A rear end portion is fixed to an airbag fixing portion 64 fixed by a fixing tool 37 such as a screw.

  When air is not supplied from the air pump 71 to the airbag 63, the airbag 63 is in a contracted state, and the swinging arm 61 and the gripper 62 are accommodated behind the kneading balls 48 by the return spring 65. It is in the state. However, if air is supplied to the airbag 63 and the airbag 63 is inflated, the rear end portion of the airbag 63 is fixed to the airbag fixing portion 64 fixed to the tapping operation plate portion 39, and therefore, the shaking. In order to rotate the moving arm 61 around the swing fulcrum shaft 45 and bring the gripper 62 closer to the upper gripping ball 48 side, gripping and gripping can be performed between the gripping ball 48 and the gripping element 62. it can. Reference numeral 76 in FIG. 13 denotes a stopper attached to the hitting plate portion 39 with a fixing tool 76a. By restricting the movement of the swinging arm 61, it is possible to prevent the treatment site from being caught too much by the kneading balls 48a and the gripper 62. Is.

  In addition, the treatment element unit 3 is provided with a vibration motor 75 at the rear end, and the vibration of the vibration motor 75 can be transmitted to the massaging balls 48 to perform massage by the vibration of the massaging balls 48.

In the massaging machine 1 configured as described above, the link 52 for causing the tapping operation plate portion 39 to swing for tapping operation using the eccentric rotational motion of the crankshaft 51 during tapping massage is described above. Thus, in order to enable movement in the width direction (axial direction of the crankshaft 51), the crankshaft 51 is slidably fitted. For this reason, of the bearings 520 and 521 arranged at both ends of the link 52, the bearing 520 that receives the crankshaft 51 is a clearance fit with respect to the crankshaft 51, but there is a tolerance due to the clearance fit. For this reason, as described above, rattling occurs when driving and the operation noise increases.

  In order to avoid this problem, as shown in FIGS. 1 and 2, the link 522 is swingably connected to the middle of the link 52 by a pin 529, and the bearing 523 provided on the link 522 is also connected to the crankshaft 51. Further, a compression coil spring (which may be a tension coil spring) 528 is disposed between the spring receiving plates 526 and 527 respectively attached between the links 52 and 522, and the links 52 and 522 Bearings 520 and 523 fitted to the crankshaft 51 are biased in opposite directions.

  The two bearings 520 and 523 fitted to the crankshaft 51 for biasing contact the crankshaft 51 with a portion located in the opposite direction in the radial direction, as shown in FIG. Therefore, rattling between the link 52 and the crankshaft 51 is eliminated, and generation of operating noise is suppressed.

  At this time, there is a gap between the bearings 520 and 523 on the side opposite to the side in contact with the crankshaft 51 and the crankshaft 51. This gap can be used as a part for supplying and holding grease. it can. FIG. 3 shows that bearings 520 and 523 that receive only a half circumference are used as bearings 520 and 523, and the remaining half circumference is used as a gap for holding grease in order to more actively perform this point. In the figure, reference numeral 83 denotes a felt material disposed at both ends in the axial direction of the gap to prevent the grease from flowing out, and reference numeral 84 denotes grease supply between the crankshaft 51 and the bearings 520 and 523 by contacting the outer surface of the crankshaft 51. This is a felt material for ensuring the reliability of the link 52 and is held by a groove formed on the inner surface of the link 52.

FIG. 4 shows a reference example, in which a fixed member 87 attached to a member supporting the crankshaft 51 is provided with a roller (preferably spherical) 86 that contacts the outer surface of the crankshaft 51 and the crankshaft 51 in the link 51. A tension spring 85 is disposed between the one end of the side and the fixing member 87, and the bearing 520 at one end of the link 51 contacts only the part of the crankshaft 51 opposite to the part where the roller 86 contacts, as in the previous embodiment. Like to do.

  FIG. 5 shows still another embodiment. Here, one end of the link 52 on the crankshaft 51 side has a long shape on one side in the axial direction of the crankshaft 51, and a cylindrical elastic body 88 is interposed between the link 52 and the bearing 520. In this case, the bearing 520 in the link 52 is held by the load F at the time of the tapping drive because the portion connected to the tapping operation plate portion 39 is offset toward one end in the axial direction of the bearing 520. One end is inclined with respect to the axis of the crankshaft 51 as shown in FIG. 5 (b), and the bearing 520 is located on the opposite side of the crankshaft 51 at one axial end and the other axial end. When the inclination is large, the elastic body 88 is compressed to suppress the inclination of the bearing 520 and prevent the bearing 520 from sliding against the crankshaft 51. Further, since the contact area between the bearing 520 and the crankshaft 51 is increased due to the presence of the elastic body 88, the wear of the bearing 520 is reduced.

  As shown in FIG. 6, a cylindrical elastic body 88 is interposed between the outer periphery of the bearing 520 and the link 52, and the bearing 520 has a notch extending over the entire axial length as shown in FIG. As shown in FIG. 6 (c), the bearing 520 is made to be in contact with substantially the entire circumference of the crankshaft 51 by reducing the inner diameter by the biasing force of the elastic body 88 using the one divided in the circumferential direction. You may do it.

BRIEF DESCRIPTION OF THE DRAWINGS It shows an example of an embodiment of the present invention, (a) is a perspective view showing the main part, (b) is a sectional view. It is a disassembled perspective view of a link same as the above. Other examples are shown, in which (a) is a longitudinal sectional view of an essential part, and (b) is a transverse sectional view of the essential part. It is a principal part longitudinal cross-sectional view of a reference example . An example of other embodiment is shown, (a) is a perspective view of a link, and (b) is a longitudinal section of an important section. FIG. 4 shows an example of another embodiment, in which (a) is a longitudinal sectional view of a main part, (b) is a transverse sectional view, and (c) is a transverse sectional view of another example. It is a fracture side view showing the whole massage machine. It is a perspective view of a mechanism block same as the above. (a) is a rear view of the same mechanism block, (b) is a side view of the same mechanism block. It is a perspective view of the block rotatably supported with respect to the flame | frame in a mechanism block same as the above. It is a side view of the principal part same as the above. It is a perspective view of a treatment element unit same as the above. (a) is a longitudinal sectional view of the treatment element unit of the above, and (b) is a side view of the treatment element unit of the same.

Explanation of symbols

1 Massage Machine 51 Crankshaft 52 Link 520 Bearing 522 Link 523 Bearing 528 Spring

Claims (4)

  A massage treatment element, a crankshaft that is driven to rotate, and a link that is connected to the crankshaft through a bearing and connected at the other end to the member on the treatment element side. In a massage machine for driving a hitting operation of a treatment element via a link, a second link that is swingably connected to the link is provided, and the second link is connected to the crankshaft via a second bearing. A massage machine characterized in that a spring is provided for linking and urging the first bearing of the link and the second bearing of the second link in opposite directions. 2. The massage machine according to claim 1, wherein a gap generated on a side opposite to the contact portion with the crankshaft by biasing of the bearing is used as a grease holding portion . A massage treatment element, a crankshaft that is driven to rotate, and a link that is connected to the crankshaft through a bearing and connected at the other end to the member on the treatment element side. In the massage machine that drives the hitting operation of the treatment element via the link, one end on the crankshaft side of the link is extended to one side in the axial direction of the crankshaft, and an elastic material is interposed between the bearing outer periphery and the link. A massage machine characterized by A massage treatment element, a crankshaft that is driven to rotate, and a link that is connected to the crankshaft through a bearing and connected at the other end to the member on the treatment element side. A massage machine for driving a hitting operation of a treatment element via a link, wherein an elastic material is interposed between the outer periphery of the bearing and the link, and a diameter-reducing bearing is used as the bearing. .

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