JP5512568B2 - Back massage device and chair type massage machine equipped with this back massage device - Google Patents

Description

  The present invention relates to a back massage device for massaging a user's back and a chair type massage machine equipped with the back massage device.

Regarding a chair type massage machine, it is well known that a massage mechanism for massaging a pair of left and right massage members is provided inside the backrest.
Since this massage mechanism needs to be moved along the back muscles of the user sitting on the seat, a vertical movement mechanism is attached, and this massage mechanism and the vertical movement mechanism constitute a back massage device. Yes. In this type of back massage device, a device having a retracting mechanism for causing the massage member to protrude forward from the normal massage position or to return to the original normal position has been proposed (for example, (See Patent Document 1).

  In this retracting / moving mechanism, a base member that moves up and down in the backrest portion by a vertical movement mechanism is provided separately from the massage mechanism, and the upper end side of the massage mechanism swings back and forth with respect to the base member via the lower pivot. It is supported to do. A slider that moves up and down by a feed screw mechanism whose axis is directed in the vertical direction is provided on the base member, and the slider and the upper end of the massage mechanism are connected by a transmission arm.

  That is, when the slider on the base member is raised, the upper end of the massage mechanism is pushed forward via the transmission arm, and as a result, the massage mechanism swings forward with the lower pivot as the fulcrum. As a result, the left and right massage members protrude forward.

JP 2010-252905 A

In the chair type massage machine with the back massage device disclosed in Patent Document 1, the massage member can be protruded forward or returned to the original normal position by operating the exit / retreat operation mechanism. The feeling was sufficiently enhanced.
However, this retracting / retracting mechanism includes an arcuate rail for guiding the upper end of the transmission arm forward when the slider moves up and down, a swing limiting mechanism for regulating the inclination of the massage member, and the like. The backrest device tended to increase in size in the front-rear direction (thickness) (see FIGS. 1 and 2 of Patent Document 1).

  The present invention has been made in view of the above circumstances, and is a backrest device having a configuration capable of projecting a massage member forward by a sufficient amount while reducing the thickness in the front-rear direction (thickness direction). And it aims at providing the chair type massage machine provided with this back massage apparatus.

In order to achieve the above object, the present invention takes the following technical means.
A back massage apparatus according to the present invention is a back massage apparatus provided on a backrest portion that allows a user to backrest, and includes a treatment element that performs a massage operation and a massage member disposed in a pair of left and right and the massage member A massage mechanism having a drive unit for transmitting a massage operation, a base member that supports the massage mechanism with the massage member facing forward, and an upper and lower position that allows the base member to move vertically in the backrest part It has a moving mechanism and a protrusion amount variable mechanism for moving the massage member so that the protrusion amount in the front-rear direction of the treatment element changes.

The base of the massage member is pivotally supported by an axial core facing in the left-right direction, and the shaft can swing. The protrusion amount varying mechanism is configured to change the protrusion amount in the front-rear direction of the treatment element. It is preferable that the base of the member be pivoted.
The massage mechanism drive unit repeatedly reciprocally pivots the massaging drive unit that drives the massage member to move the treatment element toward and away from each other in the left-right direction and performs a massaging massage operation, and the base of the massage member. And a reciprocating movement of the treatment element in the front-rear direction or the up-down direction, and a tapping drive unit that drives the massaging member so as to perform a tapping massage operation. The member is movable in the vertical direction, and the base portion of the massage member is configured to be able to swing the shaft along with the vertical movement, and the protrusion amount variable mechanism moves the hitting drive unit in the vertical direction. It is preferable that the amount of protrusion in the front-rear direction of the treatment element is variable by moving and pivoting the base of the massage member.

  More preferably, the protrusion amount varying mechanism includes a first restricting portion that maintains a swing angle of the massage member at a position where the treatment element is most retracted, and a swing movement of the massage member at a position where the treatment element protrudes most forward. And a second restricting portion that holds a corner, and a non-regulating portion that allows the base of the massage member to swing about the axis between the first restricting portion and the second restricting portion. That's fine.

  In addition, the kneading drive unit includes a first rotating shaft installed in the left-right direction, the massage member provided to be rotatable relative to the first rotating shaft, and the massage member for rotating the first rotating shaft. An anti-sway mechanism engaged with the base of the massaging member to restrict the rotation of the massaging member, and the tapping drive unit is disposed in parallel with the first rotation axis. And an eccentric drive body provided in an eccentric state with respect to the second rotation shaft, one end portion is passively connected to eccentric rotation from the eccentric drive body, and the other end portion is connected to the anti-sway mechanism. And a crankshaft that swings the base portion of the massage member around the first rotation axis by eccentric rotation from the eccentric drive body, and the protrusion amount varying mechanism moves the hitting drive portion in the vertical direction in the base member. By moving to Serial via the crank shaft may be configured for swinging the base of the massaging member to the first rotation axis.

  Further, the protrusion amount varying mechanism has a long groove facing in the vertical direction, a guide body fixed to the hitting drive unit, and a length shorter than the long groove of the guide body, and is slidable in the vertical direction in the long groove. A sliding body, and a feed screw shaft that is screwed to the sliding body and moves the sliding body up and down by rotation, and an upper edge of the long groove formed in the guide body serves as a first restricting portion. The lower edge of the long groove may be the second restricting portion, and the vertically middle portion of the long groove may be the non-restricting portion.

The treatment element may include an upper treatment element and a lower treatment element supported at a lower position than the upper treatment element.
In addition, it is very preferable to constitute a chair type massage machine having a seat portion and a backrest portion provided at the rear portion of the seat portion and incorporating the backrest device described above.
The most preferred form of the backrest device according to the present invention is a backrest device provided in a backrest portion that allows a user to backrest, and includes a treatment element that performs a massage operation and is provided in a pair on the left and right sides. A massage mechanism having a massage member and a drive unit that transmits a massage operation to the massage member, a base member that supports the massage mechanism with the massage member facing forward, and the base member within the backrest portion A vertical movement mechanism that allows movement in the vertical direction, and a protrusion amount variable mechanism that moves the massage member so that the protrusion amount in the front-rear direction of the treatment element changes, and the base of the massage member is The pivoting mechanism is pivotally supported by a shaft oriented in the left-right direction, and the projection amount varying mechanism is configured to project the projection amount in the front-rear direction of the treatment element. In order to change, it is comprised so that the base of the said massage member may be rocked | swiveled, and the said protrusion amount variable mechanism hold | maintains the rocking | fluctuation angle of a massage member in the position which the said treatment element retreats most. And a second restricting portion that maintains a swing angle of the massage member at a position where the treatment element protrudes most forward, and a base portion of the massage member is pivoted between the first restricting portion and the second restricting portion. A non-regulating portion that allows movement, and the protrusion amount varying mechanism has a long groove facing in the vertical direction and a guide body fixed to the tapping drive section, and is shorter than the long groove of the guide body. A sliding body that is slidable in the vertical direction in the long groove; and a feed screw shaft that is screwed to the sliding body and moves the sliding body up and down by rotation, and is formed on the guide body. The upper edge of the long groove is the first restriction part , The lower edge of the longitudinal groove and the second restricting portion
The middle part of the long groove in the vertical direction is a non-regulating part.

  In the back massage apparatus according to the present invention and the chair type massage machine including the back massage apparatus, the massage member can be protruded forward by a sufficient amount while achieving a reduction in thickness in the front-rear direction (thickness direction).

It is sectional drawing of a massage mechanism, Comprising: It is the sectional view on the AA line of FIG. It is sectional drawing of a massage mechanism, Comprising: It is the BB sectional drawing of FIG. It is sectional drawing of a massage mechanism, Comprising: It is CC sectional view taken on the line of FIG. It is the side view which showed the state in which the massage mechanism exists in the lowest position. It is the side view which showed the state which exists in the position which the massage mechanism rose most. It is the side view which showed the state which has a massage mechanism in the intermediate position of an up-down direction. It is a front view in the state where the upper treatment element of the massage member is most forwardly protruding. It is a front view in the state where the lower treatment element of a massage member has most projected. FIG. 7 is a front view of the massage member before the upper treatment element protrudes forward, or a state before the lower massage treatment element of the massage member protrudes most forward, and a front view in a state between FIG. 7 and FIG. It is. It is a perspective view of a massage mechanism. It is a perspective view of a back massage apparatus provided with a massage mechanism. It is the perspective view which showed the chair type massage machine provided with the back massage apparatus which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1-12 has shown one Embodiment of the chair type massage machine with a backrest apparatus based on this invention.
As shown in FIG. 12, the chair type massage machine 1 includes a seat portion 2 that is wide enough to support the user's buttocks from below and a backrest portion 3 provided at the rear portion of the seat portion 2. The backrest device 4 is provided inside the backrest portion 3 (a massage device that massages or massages the shoulder, back, and waist of the user).

A leg frame 6 for installing the chair type massage machine 1 on the floor surface is provided at the lower part of the seat part 2, and the seat part 2 is supported at a predetermined height by the leg frame 6. ing.
In the following description, regarding the backrest 3 and the backrest device 4, the structure of the backrest 3 will be described with the height direction of the backrest 3 taken as the vertical direction and the left and right directions and the front and rear directions determined based on this. For example, in FIGS. 1-9, the up-down direction in a figure is called the up-down direction in an actual apparatus. Also, in FIGS. 7 to 9, those left and right directions are referred to as right and left directions or width directions (as viewed from the user seated on the seat 2) in an actual device, and the right and left directions in FIGS. This is called the front-rear direction in the apparatus. In addition, in FIG.1, FIG.7, FIG.11, the up-down, left-right, and front-back direction used by description of this embodiment were clarified.

  The lower part of the backrest part 3 is pivotally supported with respect to the rear part of the seat part 2 or the rear part of the leg frame 6, and is held in a state in which it can swing back and forth. The backrest 3 can be reclined by a reclining mechanism such as a linear actuator mechanism disposed in the leg frame 6. Further, a foot kneading device 5 is provided at the front portion of the seat portion 2, and an armrest portion 7 is provided on both the left and right sides of the seat portion 2. However, these are examples of the equipment in the chair type massage machine 1, and the presence or absence and the detailed mechanism are not limited.

  As shown in FIG. 11, the back massage device 4 includes a massage mechanism 10, a base member 12 that supports the massage mechanism 10, and a vertical movement mechanism that allows the base member 12 to move in the vertical direction within the backrest 3. 13. In addition, the back massage device 4 has a protrusion amount variable mechanism 14 that changes the protrusion amount in the front-rear direction by moving the upper end of the massage mechanism 10 back and forth with respect to the base member 12.

First, the massage mechanism 10 will be described based on FIG. 1, FIG. 7 and FIG.
The massage mechanism 10 includes a pair of left and right massage members 17 and a drive unit 18 that causes the left and right massage members 17 to perform a massage operation.
The massage member 17 has a boomerang-shaped support arm 20 having a tip projecting obliquely forward and downward, and treatment elements 21 (21a, 21b) provided at both upper and lower ends of the support arm 20. ing. Each treatment element 21 can be formed into a thick disk shape or a spherical shape by using, for example, resin or hard rubber. In the following description, the upper treatment element 21 is referred to as “upper treatment element 21a” as necessary, and the lower treatment element 21 is referred to as “lower treatment element 21b” as necessary.

The drive unit 18 includes a kneading drive unit 23 that causes the left and right massage members 17 to move toward and away from each other, and a tapping drive unit 24 that causes the left and right massage members 17 to perform alternate tapping operations. As a thing.
The kneading drive unit 23 has an inclined rotating member 25 provided in a state of being embedded in a central bending portion with respect to the support arm 20 of the massage member 17, and an axis oriented in the left-right direction so as to penetrate the inclined rotating member 25. The first rotating shaft 26, the squeezing motor 27 that rotationally drives the first rotating shaft 26, and the support arm 20 provided at the rear of the central bent portion of the support arm 20. It has an anti-sway mechanism 28 (shown only in FIG. 10) that restricts the accompanying rotation. For this steadying mechanism 28, for example, a universal joint such as a ball joint can be adopted.

  The inclined rotating member 25 is fitted and held rotatably around a mounting boss portion provided concentrically with the first rotating shaft 26 and integrally rotated in an inclined state via a bearing or the like. Accordingly, when the first rotation shaft 26 is rotated by driving the stagnation motor 27, the tilt rotation member 25 causes fluctuation-like rotation blur about the rotation center, and this rotation blur is caused via the support arm 20. It will be transmitted to the treatment child 21.

The support arm 20 is held in a state not to rotate with the first rotation shaft 26 by the steadying mechanism 28, but is allowed to operate in a predetermined range along the front-rear direction, the left-right direction, and the up-down direction. Further, between the left and right support arms 20, the tilt direction of the tilt rotation member 25 is maintained at a phase difference of 180 ° around the first rotation shaft 26.
For this reason, the left and right support arms 20 in the stagnation drive unit 23 operate so that the upper treatment elements 21a repeat close proximity and separation in the left and right direction, and the lower treatment elements 21b It will operate to repeat mutual separation and mutual proximity in the direction. When the upper treatment elements 21a are close to each other, the lower treatment elements 21b are separated from each other, and when the upper treatment elements 21a are separated from each other, the lower treatment elements 21b are close to each other. Is generated.

  On the other hand, the hitting drive unit 24 rotates the second rotary shaft 31 with a second rotary shaft 31 that is provided in the upper position of the first rotary shaft 26 so that the shaft center is parallel to the second rotary shaft 31. The left and right eccentric drive bodies 34 provided eccentrically with a phase difference of 180 ° with respect to the left and right end portions of the second rotating shaft 31, and the left and right eccentric drive bodies 34 are rotatably held. And a crankshaft 36 (link lever) provided to project downward with respect to the housing 35.

  The eccentric drive body 34 is configured such that the shaft center of the second rotating shaft 31 and the housing 35 is made inconsistent by mounting an eccentric collar on the inner ring side or the outer ring side of the bearing. Further, the lower end portion of the crankshaft 36 is connected to the central bent portion of the support arm 20 of the massage member 17, and this connecting portion forms the above-described steadying mechanism 28 (FIG. 10). Yes. That is, the steadying mechanism 28 is provided at the lower end of the crankshaft 36, and the base of the support arm 20 (massaging member 17) is connected via the steadying mechanism 28.

  Accordingly, in the tapping drive unit 24, when the tapping motor 32 is driven, the eccentric driving body 34 rotates eccentrically with respect to the axis of the second rotating shaft 31, and the housing 35 moves circumferentially in response thereto. . Therefore, a vertical pulling operation is transmitted from the housing 35 to the crankshaft 36. For this reason, the left and right support arms 20 swing each other's treatment element 21 in small increments around the first rotation shaft 26, and the upper treatment element 21a and the lower treatment element 21b are relatively opposite in the front-rear direction. Since it moves, this will generate | occur | produce the tapping operation | movement as the massage member 17. FIG.

Note that the swing generated in the left and right support arms 20 occurs alternately because the left and right eccentric drive bodies 34 are provided with a phase difference of 180 °.
That is, when the left support arm 20 moves the upper treatment element 21a forward, the right support arm 20 moves the upper treatment element 21a rearward. Conversely, when the left support arm 20 moves the lower treatment element 21b forward, the right support arm 20 moves the lower treatment element 21b rearward.

However, this is not a limited matter. For example, if a switching mechanism that makes the phase difference between the left and right eccentric drive bodies 34 zero is provided, the left and right support arms 20 are synchronized in the same direction. The setting of the hitting operation (striking pattern) can be changed so as to swing.
Next, the base member 12 that supports the massaging mechanism 10 having the above-described configuration and the vertical movement mechanism 13 that moves the base member 12 up and down within the backrest 3 will be described.

The base member 12 supports the massage mechanism 10 with the massage member 17 facing forward. That is, the base member 12 is provided on the rear side (back) of the massage mechanism 10.
Specifically, as shown in FIG. 7 to FIG. 9, the first rotating shaft 26 has a shaft central portion that spans between the left and right massage members 17 and is rotatably supported by a first bearing portion 38. One bearing portion 38 is fixed to the base member 12. Further, the first rotating shaft 26 is connected to a gear head 39 provided on the base member 12 at the right protruding portion that penetrates the right massage member 17, and the massaging motor 27 is connected to the gear head 39. ing. In addition, the left protruding portion penetrating the left massage member 17 is rotatably held by a bearing bracket 40 fixed to the front surface of the base member 12.

As described above, the first bearing portion 38, the gear head 39, and the bearing bracket 40 that are main portions in the stagnation drive portion 23 are fixed to the base member 12, so that the massage mechanism 10 is supported by the base member 12 as a whole. It is in a state to be.
The second rotating shaft 31 of the tapping drive unit 24 is rotatably held by the second bearing portion 41 disposed on the upper side of the first bearing portion 38 described above. Along the pair of left and right vertical rail portions 42 provided on the front surface of the base member 12, the base member 12 is held so as to be movable up and down. As shown in FIGS. 1 to 3, the tapping motor 32 of the tapping drive unit 24 is arranged on the rear side (back side) of the second rotating shaft 31 and is integrally connected to the second bearing unit 41. It is assumed that the second bearing portion 41 moves up and down together with the vertical movement of the second bearing portion 41.

As described above, even if the second bearing portion 41 and the tapping motor 32 which are main parts in the tapping drive unit 24 are movable up and down, as described above, the main parts (the first bearing unit 38 and the like) of the stagnation driving unit 23. ) Is fixed to the base member 12, the left and right massage members 17 do not move up and down relative to the base member 12.
Since the second bearing 41 of the hitting drive unit 24 and the second rotating shaft 31 supported by the second driving unit 24 are movable up and down, the following movement can be realized. That is, when the kneading motor 27 rotates the first rotation shaft 26 and when the tapping motor 32 rotates the second rotation shaft 31, the massage member 17 is, as a general rule, the first rotation shaft by the steadying mechanism 28. 26 companions are restricted.

  However, when the massaging member 17 is subjected to a wobbling load by the user, the vertical pulling force is transmitted to the second rotating shaft 31 via the steady rest mechanism 28 and the crankshaft 36, and the second bearing And the hitting motor 32 move up and down along the vertical rail portion 42. Therefore, the massage member 17 is a movement in which the massage member 17 is allowed to rotate or swing within a predetermined range around the first rotation shaft 26.

  With this configuration, regardless of the massage operation by the kneading drive unit 23 or the tapping drive unit 24, the massage member 17 rotates around the first rotation shaft 26 according to the back undulation (S-curve of the spine), and The treatment element 21 comes into contact with the back with substantially equal pressure. The kneading drive unit 23 and the hitting drive unit 24 can be switched between operating either one or both simultaneously.

On the other hand, in order to make the base member 12 movable in the vertical direction within the backrest 3, the backrest device 4 includes a vertical movement mechanism 13.
As shown in FIG. 10, the up-and-down moving mechanism 13 has guide rollers 45 that are rotatably supported by projecting a rotation axis in the left-right outward direction on both the left and right sides of the upper and lower portions of the base member 12. . In addition, it has a pair of left and right guide rails 46 for fitting the guide rollers 45 to guide the movement in the vertical direction. The guide rail 46 is incorporated in the backrest portion 3 with its longitudinal direction facing up and down.

  Furthermore, as shown in FIG. 11, a screw shaft 48 that can be rotationally driven by an elevating motor 47 is provided between the guide rails 46, and the base member 12 has a nut that is screwed to the screw shaft 48. A member (not shown) is incorporated. Therefore, the screw shaft 48 is rotationally driven by the operation of the elevating motor 47 so that the massage mechanism 10 moves up and down in the backrest portion 3 together with the base member 12.

Accordingly, a user who sits on the seat 2 and presses the back against the backrest 3 can move the massage mechanism 10 up and down to receive massage in a wide range from the shoulder to the back and waist. .
Next, the “projection amount varying mechanism 14”, which is a characteristic mechanism of the backrest device 4 according to the present invention, will be described.

  As shown in FIGS. 1 to 3, 7 to 9, and the like, the protrusion amount varying mechanism 14 is configured so that the protrusion amount in the front-rear direction of the treatment element 21 changes (to the support arm 20). On the other hand, the structure in which the steady stop mechanism 28 is pivoted about the shaft 26 is configured. In other words, the protrusion amount varying mechanism 14 moves the tapping drive part 24 (second bearing part 41) in the vertical direction, and accordingly, the base part of the massage member 17 is pivoted.

Hereinafter, the detail of the protrusion amount variable mechanism 14 will be described.
First, the protruding amount varying mechanism 14 includes a guide body 55 provided at the center in the width direction of the massage member 17 provided in a pair of left and right, a sliding body 56 provided in the guide body 55, and the sliding body 56. And a feed screw shaft 57 that moves up and down in the guide body 55.
The guide body 55 is fixedly arranged on the front side of the second bearing portion 41 and the tapping motor 32 of the tapping drive unit 24, and is formed in a vertically long box shape (rectangular frame shape) with the front side opened. Has been. The front opening portion formed in the vertically long box shape forms a long groove 60 that can accommodate the sliding body 56 and that guides the accommodated sliding body 56 so as to be movable in the vertical direction.

  With respect to such a guide body 55, the sliding body 56 has a width dimension substantially equal to or slightly smaller than the groove width of the long groove 60, and is formed shorter in the vertical direction than the long groove 60. Therefore, relative vertical movement within the long groove 60 is possible while maintaining a state in which no significant backlash occurs in the width direction within the long groove 60. Further, the sliding body 56 is formed with a vertical hole penetrating between the upper surface and the lower surface, and a female screw portion 58 that is screwed with the feed screw shaft 57 is provided on the inner surface of the hole.

  The feed screw shaft 57 passes through the hole of the sliding body 56 in the vertical direction and is screwed into the female screw portion 58 on the inner surface of the hole. A worm wheel 62 is provided at an upper end portion of the feed screw shaft 57 so as to be integrally rotatable. A worm gear 63 having a rotation axis orthogonal to the worm wheel 62 is engaged with the worm wheel 62, and the worm gear 63 is electrically driven. The motor 64 is rotationally driven.

  That is, when the electric motor 64 is driven, rotational driving is transmitted to the feed screw shaft 57 via the worm gear 63 and the worm wheel 62, but the sliding body 56 is prevented from rattling in the width direction in the long groove 60. Since rotation around the feed screw shaft 57 is prevented, a relative screwing operation occurs between the feed screw shaft 57 and the sliding body 56, and as a result, the sliding body 56 moves up and down in the long groove 60. Become.

In the protrusion amount varying mechanism 14 having such a configuration, the sliding body 56 moves upward or downward by driving and rotating the feed screw shaft 57 in any one direction by the electric motor 64 as described above.
In the guide body 55, the upper edge of the long groove 60 is an upper limit for the sliding body 56 to move upward in the long groove 60. As shown in FIGS. 2 and 8, when the sliding body 56 continues to move upward after contacting the upper edge, the upward moving force is transmitted from the sliding body 56 to the entire guide body 55, and the guide body 55 is The second bearing portion 41 and the tapping motor 32 of the tapping drive unit 24 integrated with the guide body 55 move upward while being guided by the vertical rail unit 42 as well as moving upward.

That is, when the second bearing portion 41 reaches the upper limit of the vertical rail portion 42, the sliding body 56 that is in contact with the upper edge of the long groove 60 is also prevented from further upward movement in the guide body 55. The upper edge of the long groove 60 at this time is set as the first restricting portion 65.
The lower edge of the long groove 60 is a lower limit for the sliding body 56 to move downward in the long groove 60. As shown in FIGS. 1 and 7, when the sliding body 56 continues to move downward even after contacting the lower edge, a downward moving force is transmitted from the sliding body 56 to the entire guide body 55, so that the guide body 55 The second bearing portion 41 and the tapping motor 32 of the tapping drive unit 24 that are integrated with the guide body 55 are moved downward while being guided by the vertical rail portion 42 as well as moving down.

That is, when the second bearing portion 41 reaches the lower limit of the vertical rail portion 42, the sliding body 56 in contact with the lower edge of the long groove 60 is also prevented from further downward movement in the guide body 55. The lower edge of the long groove 60 is referred to as a second restricting portion 66.
Further, as shown in FIGS. 3 and 9, the sliding body 56 and the lower edge of the long groove 60 come into contact with each other when the second bearing portion 41 has not reached either the upper limit or the lower limit of the vertical rail portion 42. The guide body 55 is allowed to move downward relative to the slide body 56, and the guide body 55 is allowed to move upward relative to the slide body 56 until the slide body 56 contacts the upper edge of the long groove 60. That is, since the guide body 55 is movable up and down within a predetermined range, the guide body 55 is sandwiched between the non-restricting portion 67 (the first restriction portion 65 and the second restriction portion 66 in the long groove 60) in the long groove 60 under this condition. A vertical region) is formed.

  As shown in FIGS. 1 and 7, in the protrusion amount variable mechanism 14 having the above-described configuration, when the sliding body 56 is moved downward, the sliding body 56 abuts on the lower edge in the long groove 60 and guides. The downward movement force is transmitted to the body 55, and thereby the guide body 55 moves downward while being guided by the vertical rail portion 42 together with the second bearing portion 41 and the tapping motor 32 of the tapping drive unit 24. The downward movement of the second bearing portion 41 and the tapping motor 32 causes the base portion of the massage member 17 to swing downward about the first rotation shaft 26 via the crankshaft 36 as described above (first rotation in FIG. 10). As a result, the upper treatment element 21a retreats and the lower treatment element 21b protrudes forward. Since the sliding body 56 reaches and engages with the second restricting portion 66 (the lower edge of the long groove 60), the massage member 17 maintains its swing angle as the lower treatment element 21b protrudes most forward. Will come to be. Even if an attempt is made to push in the lower treatment element 21b due to the pressing force from the user, the situation cannot be pushed.

  Similarly, as shown in FIGS. 2 and 8, when the sliding body 56 is moved upward, the sliding body 56 abuts on the upper edge in the long groove 60 and transmits an upward movement force to the guide body 55, thereby guiding the guide. The body 55 moves upward while being guided by the vertical rail portion 42 together with the second bearing portion 41 of the tapping drive unit 24 and the tapping motor 32. The upward movement of the second bearing portion 41 and the tapping motor 32 causes the base of the massage member 17 to swing upward about the first rotation shaft 26 via the crankshaft 36 (centering on the first rotation shaft 26 in FIG. 10). As a result, the upper treatment element 21a protrudes forward and the lower treatment element 21b moves backward. If the sliding body 56 reaches the first restricting portion 65 (the upper edge of the long groove 60) and engages and does not move any further, the upper treatment element 21a is projected most forward, and the massage member 17 is swung. The moving angle is maintained. Even if it is going to push in the upper treatment element 21a with the pushing force from a user, it is in the situation which cannot push in.

On the other hand, as shown in FIGS. 3 and 9, while the sliding body 56 exists in the non-restricting portion 67, the guide body 55 can move up and down by the vertical length of the non-restricting portion 67. Yes. Therefore, the second bearing portion 41 and the tapping motor 32 of the tapping drive unit 24 are also movable up and down while being guided by the vertical rail portion 42 by the vertical length of the non-regulating portion 67.
Therefore, such vertical movement of the guide body 55 is transmitted to the crankshaft 36, and the base portion of the massage member 17 is also swingable around the first rotation shaft 26. In other words, the rotation of the massage member 17 (rotation around the first rotation shaft 26) is allowed except for the posture of the massage member 17 that is restricted by the first restriction portion 65 and the second restriction portion 66. Therefore, as a result, it is possible to obtain a situation in which the upper treatment element 21a and the lower treatment element 21b freely project forward and backward.

The operation of the protruding amount variable mechanism 14 will be further described with reference to FIGS. 4 to 6 in association with the operation of the vertical movement mechanism 13.
4 is a state where the massage mechanism 10 is stopped at the lower end position (user's waist position), and FIG. 5 is a state where the massage mechanism 10 is stopped at the upper end position (user's shoulder position). Yes, FIG. 6 is a state between FIG. 4 and FIG. 5, and shows the middle of the massage mechanism 10 being raised or lowered.

First, the process (FIG. 4 → FIG. 6 → FIG. 5) in which the massage mechanism 10 moves upward from the lower position and is positioned on the shoulder of the user will be described. The following movement is executed by controlling the elevating motor 47 and the electric motor 64 by a program of a control unit (not shown) provided in the chair type massage machine 1.
Since the massaging mechanism 10 in FIG. 4 focuses on massaging the user's lower back, the projecting amount varying mechanism 14 has the sliding body 56 that reaches the second restricting portion 66 as shown in FIGS. The base of the massage member 17 is swung downward about the first rotation shaft 26 until the upper treatment element 21a is most retracted and the lower treatment element 21b is projected most forward. The swing angle of the member 17 is maintained.

From this state, the elevating motor 47 of the up-and-down moving mechanism 13 rotates and the screw shaft 48 rotates, whereby the base member 12 including the nut member screwed into the ascending mechanism moves up. As shown in FIG. 10 also moves upward together.
Along with the upward movement of the massage mechanism 10, the control unit issues a command to the electric motor 64 of the protrusion amount varying mechanism 14, and the sliding body 56 is moved to the second restricting portion 66 and the first restricting portion as shown in FIGS. The upper part is moved upward and downward (unregulated part 67) with 65. Therefore, the base of the massage member 17 is slightly swung upward about the first rotation shaft 26, so that the upper treatment element 21a slightly protrudes forward and the lower treatment element 21b slightly retracts backward.

  Thereafter, as shown in FIG. 5, when the massage mechanism 10 further moves upward and reaches the shoulder position of the user, the protrusion amount varying mechanism 14 is moved to the sliding body 56 as shown in FIGS. 2 and 8. Is moved upward until it reaches the first restricting portion 65, and the base portion of the massage member 17 is swung upward about the first rotation shaft 26, so that the upper treatment element 21a protrudes most forward and the lower treatment element 21b In the most retracted state, the rocking angle of the massage member 17 is maintained.

Since the upper treatment element 21a protrudes most forward, if the tapping drive unit 24 is driven in this state and the base of the massage member 17 is repeatedly pivoted, the upper treatment element 21a reciprocates vertically. Thus, the user's shoulder can be massaged reliably and effectively from above to the front.
In addition, when it is under this condition, suppose that the load PU (force to push back) was loaded on the upper treatment element 21a of the massage member 17. As a result, a swinging force is applied to the massage member 17 so as to rotate the first treatment shaft 21 around the first rotation shaft 26 so as to move the upper treatment element 21a behind the lower treatment element 21b. It is expected that a force FL in the direction of pulling down will be applied.

  However, even if the guide body 55 may be pulled downward, the sliding body 56 is screwed with the feed screw shaft 57 in the projecting amount varying mechanism 14, so that the upper edge of the long groove 60 is in contact with the sliding body 56. At the time of contact, the downward movement of the guide body 55 is stopped. Therefore, the problem that the massage member 17 causes the upper treatment element 21a to be rearward of the lower treatment element 21b does not occur, and the rocking angle of the massage member 17 is reliably maintained.

Next, the process (FIG. 5 → FIG. 6 → FIG. 4) in which the massage mechanism 10 moves from the upper position to the lower position and is located on the user's waist will be described. The following movements are also realized by controlling the elevating motor 47 and the electric motor 64 by a program of a control unit (not shown) provided in the chair type massage machine 1.
Since the massaging mechanism 10 in FIG. 5 focuses on massaging the user's shoulder, the protruding amount varying mechanism 14 has a sliding body 56 in the first restricting portion 65 as shown in FIGS. The massager 17 is moved upward until it reaches the base, and the base of the massage member 17 is swung upwards around the first rotation shaft 26, so that the upper treatment element 21a protrudes most forward and the lower treatment element 21b moves most backward. The swing angle of the member 17 is maintained.

From this state, the elevating motor 47 of the up-and-down moving mechanism 13 rotates and the screw shaft 48 rotates, so that the base member 12 containing the nut member screwed therein is lowered, and as shown in FIG. 10 also moves downward together.
As the massage mechanism 10 moves downward, the control unit issues a command to the electric motor 64 of the protrusion amount varying mechanism 14, and as shown in FIGS. 3 and 9, the sliding body 56 is moved to the second restricting portion 66 and the first restricting portion. It is moved downward between the upper and lower parts 65 (non-regulating part 67). Therefore, the base portion of the massage member 17 is slightly swung downward about the first rotation shaft 26, so that the upper treatment element 21a slightly retracts backward and the lower treatment element 21b slightly protrudes forward.

  Thereafter, as shown in FIG. 4, when the massage mechanism 10 further moves downward and reaches the waist position of the user, the protruding amount varying mechanism 14 is moved to the sliding body 56 as shown in FIGS. 1 and 7. Is moved downward until it reaches the first restricting portion 65, and the base portion of the massage member 17 is swung downward about the first rotation shaft 26, so that the upper treatment element 21a is most retracted and the lower treatment element 21b is moved downward. The swinging angle of the massaging member 17 is maintained as the most protruding state.

Since the lower treatment element 21b protrudes most forward, the upper treatment element 21a is reciprocated in the front-rear direction by driving the tapping drive unit 24 in this state to repeatedly swing the base of the massage member 17 in the axial direction. Thus, the user's waist can be massaged reliably and effectively.
In this situation, it is assumed that the lower treatment element 21b of the massage member 17 is caught and a load PL (force to push backward) is applied. As a result, a swinging force is applied to the massage member 17 so as to turn the lower treatment element 21b behind the upper treatment element 21a so as to rotate about the first rotation shaft 26. Accordingly, the guide body 55 is provided. It is expected that an upward force FU that pushes upward will be applied.

  However, even if the guide body 55 is pushed upward, the sliding body 56 is screwed with the feed screw shaft 57 in the protrusion amount varying mechanism 14, so that the lower edge of the long groove 60 is connected to the sliding body 56. When the contact is made, the upward movement of the guide body 55 is stopped. Therefore, the problem that the massage member 17 causes the lower treatment element 21b to be rearward of the upper treatment element 21a does not occur, and the swing angle of the massage member 17 is reliably maintained.

In the middle of changing the swing angle of the massaging member 17 by the protrusion amount varying mechanism 14 (while the upper treatment element 21a protrudes most forward or conversely the lower treatment element 21b protrudes most forward) As shown in FIGS. 3 and 9, the guide body 55 is movable up and down within a predetermined range with respect to the sliding body 56.
That is, when the massaging member 17 is subjected to a squeezing load PU or PL against the upper treatment element 21a or the lower treatment element 21b, the second bearing portion 41 of the tapping drive unit 24 and the tapping motor 32 are loaded together with the guide body 55. Also, the massage member 17 connected through the crankshaft 36 is freely rotated around the first rotation shaft 26. Therefore, as shown in FIG. 6, when the massaging mechanism 10 is moved up and down in this state, the massaging member 17 is rotated around the first rotation shaft 26 in accordance with the S-shaped curve of the back, and the upper treatment element 21a and The lower treatment element 21b comes into contact with the back with substantially equal pressure.

  As described above, when the sliding body 56 is present in the non-restricting portion 67 of the guide body 55, the hitting drive portion 24 can move up and down slightly, so that the technology already developed by the present applicant (Japanese Patent Laid-Open No. 2007-97834). No.) can be adopted for the massage mechanism 10. That is, the massage mechanism 10 includes a shoulder position detection mechanism, and this shoulder position detection mechanism is a position where the swing angle around the left and right axis 26 of the support arm 20 (swing arm) is away from the left and right axis 26. The angle conversion unit that converts to the linear movement distance at, the distance measurement unit that measures the linear movement distance converted by the angle conversion unit, and the shoulder position of the user based on the linear movement distance measured by the distance measurement unit And a shoulder position detection unit for detection.

  As is apparent from the above detailed description, in the backrest device 4 according to the present invention, the protrusion amount variable mechanism 14 is replaced with the retracting / retracting mechanism provided in the conventional backrest device (see Patent Document 1, etc.). Therefore, the rail portion and the swing restriction mechanism that protrude forward are unnecessary, and the backrest device 4 can be thinned in the front-rear direction. Further, even if the backrest device 4 is thinned as described above, a sufficient amount of operation for projecting the massage mechanism 10 forward or returning it to the original normal position can be secured.

Naturally, since the back massage apparatus 4 can be thinned, the chair-type massage machine 1 can also suppress the backrest 3 from becoming thick.
In addition, in this chair type massage machine 1, the user sitting on the seat part 2 leans so that the back is pressed against the backrest part 3, and the backrest device 4 is operated in this state, so that the massage mechanism 10 can be operated. The massage massage by the massage drive unit 23 and the massage massage by the strike drive unit 24 can be received via the left and right massage members 17.

And the massaging mechanism 10 (massaging member 17) is made to project ahead of the normal massaging position by operating the projecting amount varying mechanism 14 according to the necessity regarding the user's body shape and massaging position or the user's preference. Or return to the normal position.
When the protrusion amount variable mechanism 14 is operated, when the massage mechanism 10 is protruded forward, the upper treatment element 21a of the massage member 17 is in the forward protrusion state, and this state is maintained even if the user is subjected to the stagnation load PU. Will come to be.

Further, when the massage mechanism 10 is retracted backward, the lower treatment element 21b of the massage member 17 is in a forward projecting state, and this state is maintained even if the stagnation load PL is applied by the user.
Therefore, a massage such as hitting and itching can be obtained accurately and locally (pinpoint), and the user's expectation can be satisfied.

By the way, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
For example, the detailed structure (other than the basic configuration including the seat portion 2 and the backrest portion 3) as the chair type massage machine 1 and the detailed structure of the massage mechanism 10 are not limited at all.

Further, the massage member 17 described in the embodiment includes a boomerang-shaped support arm 20 having a tip protruding upward and downward obliquely forward, and a treatment element 21 (21a provided at both upper and lower ends of the support arm 20). 21b), but there is no problem even if it is a “two-ball type” with one treatment element 21 on each of the left and right sides.
Further, the chair type massage machine 1 may have a “body part detection sensor” made of a photoelectric sensor or the like inside the backrest part 3. With this sensor, for example, the shoulder position of the user is detected. Based on the detected shoulder position of the user, the upper end portion (upper treatment element 21a) of the massage mechanism 10 is located at the shoulder position of the user. It may be controlled so that the upper end portion (upper treatment element 21a) of the massage mechanism 10 is retracted backward when protruding forward and at the user's waist position (a portion below the shoulder position by a predetermined distance). . Such control may be performed by a control unit provided in the chair type massage machine 1.

  The massage member 17 may include only the upper treatment element 21 a with respect to the support arm 20.

DESCRIPTION OF SYMBOLS 1 Chair type massage machine 2 Seat part 3 Backrest part 4 Backrest apparatus 5 Footrest apparatus 6 Leg frame 7 Armrest part 10 Massage mechanism 11 Swing pivot part 12 Base member 13 Vertical movement mechanism 14 Projection amount variable mechanism 17 Massage member 18 Drive Part 20 Support arm 21 Treatment element 21a Upper treatment element 21b Lower treatment element 23 Gripping drive part 24 Tapping drive part 25 Inclination rotating member 26 First rotation axis 27 Lumping motor 28 Stabilizing mechanism 31 Second rotation axis 32 Tapping motor 34 Eccentric drive Body 35 Housing 36 Crankshaft 38 First bearing portion 39 Gear head 40 Bearing bracket 41 Second bearing portion 42 Vertical rail portion 45 Guide roller 46 Guide rail 47 Lifting motor 48 Screw shaft 55 Guide body 56 Slide body 57 Feed screw shaft 58 Female thread portion 60 long groove 62 worm wheel 63 Worm gear 64 Electric motor 65 First restriction part 66 Second restriction part 67 Non-regulation part

Claims (5)

A back massage device provided in a backrest part which is made possible for a user to backrest,
A massage mechanism having a treatment element for performing a massage operation and having a massage member arranged in a pair on the left and right and a drive unit for transmitting the massage operation to the massage member, and supporting the massage mechanism with the massage member facing forward A base member that moves, a vertical movement mechanism that allows the base member to move in the vertical direction within the backrest, and a protrusion amount variable mechanism that moves the massage member so that the protrusion amount in the front-rear direction of the treatment element changes. , has a,
The base of the massage member is pivotally supported by an axial core facing in the left-right direction, and the shaft can swing. The protrusion amount varying mechanism is configured to change the protrusion amount in the front-rear direction of the treatment element. The base of the member is configured to pivot,
The protrusion amount varying mechanism holds a swing angle of the massage member at a position where the treatment element protrudes most forward, and a first restricting portion that holds the swing angle of the massage member at a position where the treatment element retracts most. A second restricting portion, and a non-regulating portion that allows the base of the massage member to swing around the axis between the first restricting portion and the second restricting portion,
The protrusion amount variable mechanism has a long groove facing in the vertical direction, a guide body fixed to the hitting drive unit, and a slide body that is shorter than the long groove of the guide body and is slidable in the vertical groove. And a feed screw shaft that engages with the sliding body and moves the sliding body up and down by rotation, and the upper edge of the long groove formed in the guide body is the first restricting portion, A backrest device characterized in that a lower edge of the long groove is a second restricting portion, and a vertically middle portion of the long groove is a non-restricting portion . The massage mechanism drive unit repeatedly swings the axis of the massaging drive unit that drives the massaging member to move the treatment element close and away in the left-right direction to perform the massaging operation, and the base of the massaging member. And a reciprocating movement of the treatment element in the front-rear direction or the up-down direction, and a tapping drive unit that drives the massage member to perform a tapping massage operation,
The hitting drive unit is movable in the vertical direction in the base member, and the base part of the massage member is configured to be able to swing the shaft along with the vertical movement,
The protrusion amount variable mechanism is characterized in that the protrusion amount in the front-rear direction of the treatment element is variable by moving the hitting drive portion in the vertical direction and pivoting the base portion of the massage member. a back massaging device according to 1. The stagnation drive unit includes a first rotation shaft that extends in the left-right direction, the massage member that is relatively rotatable on the first rotation shaft, and the massage member that rotates with the rotation of the first rotation shaft. An anti-sway mechanism engaged with the base of the massage member to restrict the rotation
The hitting drive unit includes a second rotation shaft disposed in parallel with the first rotation shaft, an eccentric drive body provided in an eccentric state with respect to the second rotation shaft, and one end portion from the eccentric drive body. A crankshaft that is passively connected to the eccentric rotation and has the other end connected to the steadying mechanism and that causes the base of the massaging member to swing about the first rotation axis by the eccentric rotation from the eccentric drive body. Have
The protrusion amount variable mechanism is configured to swing the base portion of the massage member around the first rotation shaft via the crankshaft by moving the hit driving unit in the vertical direction in the base member. The backrest device according to claim 1 or 2 , characterized in that. The said therapeutic element is provided with the upper therapeutic element and the lower therapeutic element supported in the downward position rather than the said upper therapeutic element, The backrest apparatus in any one of Claims 1-3 characterized by the above-mentioned. A chair-type massage machine comprising: a seat portion; and a backrest portion provided at a rear portion of the seat portion and incorporating the backrest device according to any one of claims 1 to 4 .

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