JP5107181B2 - Chair type massage machine - Google Patents

Description

  The present invention relates to a chair type massage machine including a leg rest that rotates up and down.

  2. Description of the Related Art A chair type massage machine is known that includes a leg rest on which a user places a leg, and the leg rest rotates up and down. Such a chair-type massage machine is freely rotatable about a horizontal axis at the front of the main body frame, a main body frame placed on the floor, a seat provided on the main body frame and seated by a user. A leg mounting unit attached as a base, a leg driving unit for rotating the leg mounting unit up and down around the axis, and a massage tool provided on the leg mounting unit (see, for example, Patent Document 1) ).

The leg drive unit is a telescopic actuator that expands and contracts by the rotation of a motor. The base of the telescopic actuator is rotatably attached to the main body frame by a shaft, and the tip portion rotates by a shaft to the leg frame of the leg mounting unit. It is attached movably. According to this configuration, when the telescopic actuator is extended, the leg rest can be pushed up and turned, and when the telescopic actuator is shortened, the leg rest can be lowered and turned.
As described above, the leg drive unit is rotated by the leg drive unit so that the leg of the user is relaxed or the massage is performed on the user's leg held by the leg mount unit. Massage can be performed with tools. And when the chair type massage machine is not used, the leg rest can be turned down and lowered so that the leg rest does not get in the way.

JP 2006-288488 A (see FIG. 3)

The base portion of the telescopic actuator is connected to the main body frame by a shaft, and the tip portion is connected to the leg frame of the leg rest portion by a shaft. For this reason, if a heavy object other than the user's leg rests on the leg rest while the leg rest is rotated upward, an excessive force acts on the leg rest, the telescopic actuator, and its connecting part. There is a risk that problems may occur in these.
In addition, if there is an obstacle between the floor and the leg resting part while turning the leg resting part that was in the state of being turned up, the leg resting part becomes the obstacle. The expansion / contraction actuator is forced to pull down the leg rest. For this reason, an excessive force may act on the leg rest, the telescopic actuator, and the connecting portion thereof, which may cause a problem.

As described above, it is possible to relax the user by adopting a configuration in which the leg rest is pivoted up and down, but by adopting such a configuration, the device can be used in an emergency as described above. There is a risk of causing problems.
Then, an object of this invention is to provide the chair type massage machine which can prevent generation | occurrence | production of the malfunction for the apparatus for rotating the leg mounting part up and down, and a leg mounting part.

The chair-type massage machine of the present invention is rotatable about a horizontal axis at the front part of the main body frame, a seat part provided on the main body frame and seated by a user, and a front part of the main body frame. A leg mounting unit attached as a leg driving unit that rotates the leg mounting unit up and down around the axis, and a massage tool provided on at least one of the seat unit and the leg mounting unit; a chair-type massage machine provided with a an abnormality load is applied from above to the leg-rest portion in a state of being rotated above, it includes a retracting means for rotating the leg-rest portion to the lower The retracting means includes a sensor for detecting the abnormal load, and a control unit for controlling the leg mounting unit to rotate downward by the leg driving unit based on a detection signal of the sensor. ing.
According to the present invention, when an abnormal load is applied from above to the leg resting portion that is rotated upward, the retracting means pivots the leg resting portion downward, so that the abnormal load is placed on the leg resting portion. The leg drive unit and the leg rest can be prevented from being damaged.
In addition, when the abnormal load is detected by the sensor, the control unit can rotate the leg mounting portion downward by the leg driving unit, and can control the abnormal load from the leg mounting unit.

In addition, the chair type massage machine of the present invention has a main body frame placed on the floor, a seat provided on the main body frame and seated by a user, and a front portion of the main body frame that rotates around a horizontal axis. A massage device provided on at least one of a leg mounting portion that is attached to be freely movable, a leg driving portion that rotates the leg mounting portion up and down around the axis, and the seat portion and the leg mounting portion. And a retraction means for rotating the leg rest part downward when an abnormal load acts on the leg rest part in a state of being pivoted upward. The leg drive unit includes a telescopic actuator that pushes up and rotates the leg rest when the base part is rotatably attached to the main body frame and extends, and the retracting means includes the abnormal load Before the action In the case of having a guide part that rotates the leg rest part downward by moving the tip part of the telescopic actuator to the leg tip side without changing the overall length of the telescopic actuator When the abnormal load is applied to the leg rest, the guide part moves the tip of the telescopic actuator to the leg tip side of the leg rest without changing the overall length of the telescopic actuator. At the same time, it can be rotated downward, and at the same time, the leg rest can be pivoted downward, and the abnormal load can be transferred from the leg rest.

The present invention also provides a main body frame placed on the floor surface, a seat portion provided on the main body frame and seated by a user, a leg main body portion on which a user places a leg, and supporting the leg main body portion and A leg mounting portion having a leg frame attached to a front portion of the main body frame so as to be rotatable about a horizontal axis, a leg driving unit for vertically rotating the leg frame about the axis; and the seat A massage device provided on at least one of a leg portion and the leg main body portion, and an abnormal load from above on the leg resting portion in a state of being rotated upward When the action, it further has a retracting means for rotating the leg mounting portion downward, the leg driving unit is attached to the front portion of the main body frame so as to be rotatable around a horizontal axis, And support the leg frame from the back side The first arm is attached to the front portion of the main body frame so as to be rotatable around a horizontal axis, and the first arm can be supported from the back side. A second arm that is separable downward in the direction of movement; and by extending, the second arm is pushed up to rotate around the axis and shortened to lower the second arm and rotate around the axis. A telescopic actuator for moving the first arm, and the first arm is located on the leg tip side of the leg rest portion with respect to the second arm. and long Kuna' than the leg frame, when the abnormality load is applied, the provided so as to be position change down in the rotational direction relative to the first arm, said saving means, the position A sensor for detecting changes; And a control unit which controls to rotate downward the leg frame is shortened the telescopic actuator based on the detection signal of the sensor.

According to the present invention, when the leg frame is rotated up and down by the leg drive unit, a moment acts on the leg frame, but the first arm supporting the leg frame from the back side is more than the second arm. Because it is long, the moment arm can be made larger (than when the first arm is short). For this reason, the force required for the first arm to support the leg frame can be reduced, and the load acting on the leg frame as a reaction force is also reduced, so there is no need to form the leg frame particularly firmly. , Leading to weight reduction.
However, when the first arm becomes long, it becomes easy to contact an obstacle existing between the floor and the floor while the first arm is rotating downward. Therefore, in the present invention, the first arm and the second arm are both attached to the front portion of the main body frame so as to be rotatable around the left and right axis, and the second arm supports the first arm from the back side. Since the first arm can be separated downward in the rotation direction, even if the first arm contacts the obstacle while rotating downward, the first arm The telescopic actuator can continue to be shortened by pulling down only the second arm, leaving For this reason, the telescopic actuator does not forcibly rotate the first arm and the leg frame downward, and an excessive force does not act on the telescopic actuator, the first arm and the leg frame. be able to. Since the second arm is shorter than the first arm, the second arm has a configuration in which an obstacle is less likely to exist between the first arm and the floor surface.
Further, when an abnormal load is applied from above to the leg mounting portion that is in the state of being rotated upward, the position of the leg frame is changed downward relative to the first arm. When the sensor detects this change in position, the control unit shortens the telescopic actuator and pivots the leg frame downward, so that the abnormal load can be transferred from the leg resting part, resulting in problems with the telescopic actuator and the leg frame. This can be prevented.

  According to the first aspect, even if an abnormal load is applied to the leg rest from above, the abnormal load can be applied from the leg rest, and the occurrence of malfunction of the device can be prevented. According to the second aspect of the invention, when the leg resting portion rotates downward, the arm supporting the leg resting portion from the back side contacts the obstacle existing between the floor surface. However, since excessive force does not act, it is possible to prevent the occurrence of malfunction of the device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of a chair type massage machine of the present invention. This chair type massage machine is composed of a seat 1 on which a user sits, a leg rest 2 on which a user puts legs, a backrest 3 on which a user can lean, and left and right arms on which the user puts left and right arms. And an armrest 4. Moreover, this chair type massage machine is provided with the main body frame 7 which is placed on the floor and forms the skeleton of the chair main body.
The seat 1 is provided on the upper part of the main body frame 7. The leg rest portion 2 is attached to the front portion of the main body frame 7 so as to be rotatable about a left-right axis C1. Moreover, the chair type massage machine includes a leg driving unit 5 that rotates the leg placing unit 2 up and down around the axis C1. FIG. 2 is a perspective view of the main body frame 7 and the leg drive unit 5.

The leg rest 2 is provided with a massage tool 6 (see FIG. 1), and the massage tool 6 is an air cell that expands or contracts by supplying or discharging air. When air is supplied from an air supply unit (not shown) provided in the main body frame 7, the air cell expands and presses the leg of the user. On the other hand, when the air supply unit is in an exhaust state, the air cell contracts.
The backrest 3 is rotatable around a horizontal axis C2 in the left-right direction, and is reclined by an actuator (not shown) provided between the seat 1 and the backrest 3.

  3 to 5 are side views of the leg rest portion 2, the main body frame 7, and the leg drive portion 5. FIG. In FIGS. 3 to 5, the right frame 7R (see FIG. 2) is omitted for ease of explanation. As described above, the leg mounting part 2 is attached to the front part of the main body frame 7 so as to be rotatable around the axis C1, and the leg driving part 5 has the telescopic actuator 10 that expands and contracts. When the telescopic actuator 10 expands and contracts, the leg resting portion 2 is positioned immediately before the main body frame 7 and the leg resting portion 2 is located at the retracted position (FIG. 3) where the leg tip side of the leg resting portion 2 is down. It is possible to move between the most elevated position (FIG. 4) that protrudes forward from the front end portion of the main body frame 7 and has the leg tip side forward. Further, the telescopic actuator 10 can stop the leg resting portion 2 at an arbitrary position (intermediate position) between the retracted position (FIG. 3) and the highest position (FIG. 4), and can maintain this state ( FIG. 5).

  In FIG. 2, the main body frame 7 includes a left frame 7L, a right frame 7R, and connecting members 7a, 7b, and 7c that connect the left and right frames 7L and 7R. A shaft member 15 extending inward in the left-right direction is attached to the upper part and the front part of the left and right frames 7L, 7R. The center line of the shaft member 15 is the axis C1. A mounting bracket 7d and a mounting bracket 7e for the leg drive unit 5 are attached to each of the first connecting member 7a and the second connecting member 7b. Since the first mounting bracket 7d is located below and behind the upper front end of the main body frame 7 to which the shaft member 15 is mounted, the first mounting bracket 7d is provided on the upper portion of the main body frame 7 when viewed from above. The mounting bracket 7d is present so as to be hidden by the seat portion 1 being provided.

  In FIG. 4, the leg rest 2 has a leg main body 11 on which a user puts a leg, and a leg frame 12 that supports the leg main body 11. The leg frame 12 is attached to the shaft member 15 provided at the front portion of the main body frame 7 and is rotatable around the axis C1 in the left-right direction. The leg body 11 is provided with recesses 11L and 11R (see FIG. 1) on the left and right, and the user can put the left and right legs into these recesses 11L and 11R, respectively. An air cell as the massage tool 6 is provided on the leg main body 11.

  The leg frame 12 of the leg rest portion 2 is formed into a substantially flat plate shape by combining metal frame members, and has a back plate 12a at the center. The leg frame 12 supports the leg main body portion 11 from the back side. It is attached like this. The leg main-body part 11 of embodiment is divided into 2 in the length direction of a leg, and has the legrest 11a which mounts a user's calf, and the footrest 11b which mounts an ankle and a sole. The leg frame 12 is attached to the legrest 11a and the footrest 11b so that the legrest 11a and the footrest 11b can move in the length direction of the legs. That is, the position of the legrest 11a and the footrest 11b can be adjusted in the length direction of the leg, and the leg rest 2 can be expanded and contracted according to the length of the user's leg.

  The leg drive unit 5 has a function of rotating the leg frame 12 up and down around the axis C1. As the leg frame 12 rotates up and down, the leg main body 11 rotates up and down around the axis C1. In FIG. 2, in addition to the telescopic actuator 10, the leg drive unit 5 has the same axis as the first arm 21 attached to the attachment bracket 7d of the connecting member 7a so as to be rotatable about the axis C3 in the horizontal direction. And a second arm 22 attached to be rotatable about the center C3. The first arm 21 and the second arm 22 are separately and independently rotatable about the same axis C3, and the first arm 21 can freely rotate.

  The first arm 21 is a member that linearly extends from the mounting bracket 7d, and as shown in FIGS. 4 and 5, the leg is in a state of being rotated upward (most upright position or midway position). The frame 12 can be supported from the back side. A roller 13 is provided as a contact member at the tip of the first arm 21, and the roller 13 contacts the back plate 12 a of the leg frame 12, so that the leg frame 12 is moved from the back side by the first arm 21. It is supported. That is, when viewed from the side, the leg frame 12 is in a state of being supported at two points in the front-rear direction by the shaft member 15 of the main body frame 7 and the roller 13 of the first arm 21.

  7 and 8 are explanatory views of the first arm 21, the second arm 22, and the peripheral portion thereof. The first arm 21 has a contact plate 21a facing forward or upward, and a reinforcing plate 21b bent from the left and right sides of the contact plate 21a toward the main body frame 7 side. 7 and 8, the first arm 21 is shown as a cross section in which almost the entire reinforcing plate 21b on one side is omitted.

  The second arm 22 has a straight portion 22a that extends linearly from the mounting bracket 7d, and a mounting portion 22b that is integral with the straight portion 22a. The attachment part 22b exists on the side of the expansion / contraction actuator 10 with respect to the linear part 22a, and the tip part 10a of the expansion / contraction actuator 10 is attached to be rotatable. The linear portion 22 a can contact the contact plate 21 a of the first arm 21 in a state where the straight portion 22 a exists between the left and right reinforcing plates 21 b of the first arm 21. According to this configuration, as shown in FIG. 7, the second arm 22 can be supported from the back side of the first arm 21 in a state of being turned up, In addition, as shown in FIG. 8, the second arm 22 is separable downward in the rotational direction with respect to the first arm 21.

  The first arm 21 is set to be longer than the second arm 22 so that the tip of the first arm 21 is positioned closer to the leg tip side of the leg rest 2 than the tip of the second arm 22 (linear portion 22a). ing. That is, the length from the front part (axis center C3) of the main body frame 7 is longer than the 2nd arm 22 (linear part 22a). The base of the first arm 21 and the base of the second arm 22 are both attached to the same mounting bracket 7d, but the tip of the second arm 22 (straight line portion 22a) is in the longitudinal direction of the first arm 21. It has only reached the center position. That is, the length of the second arm 22 (straight line portion 22a) from the axis C3 is substantially the same as the half of the length of the first arm 21 from the axis C3. Therefore, the turning radius of the first arm 21 is larger than the turning radius of the second arm and is almost double.

  The telescopic actuator 10 has a motor, a nut member that is rotated by the rotation of the motor, and a screw rod that is screwed to the nut member, and the screw rod advances and retreats by the rotation of the motor, although not shown. The telescopic actuator 10 can expand and contract as a whole. In FIG. 2, the telescopic actuator 10 has a base end portion 10b attached to the second mounting bracket 7e so as to be rotatable. Therefore, when the telescopic actuator 10 extends, the second arm 22 can be forcibly pushed up and rotated around the axis C3. Then, by shortening the telescopic actuator 10, the second arm 22 can be forcibly pulled down and rotated about the axis C3.

  When the second arm 22 is pushed up and rotated upward by the extension of the telescopic actuator 10, the second arm 22 can be pushed up to rotate the first arm 21 upward. When the first arm 21 is rotated upward, the first arm 21 is pushed up from the back side so as to rotate the leg frame 12 of the leg rest 2. At this time, the roller 13 of the first arm 21 rolls on the back plate 12 a of the leg frame 12. And the leg rest part 2 can reach the highest position (FIG. 4). On the other hand, when the telescopic actuator 10 is shortened, the second arm 22 rotates downward. The first arm 21 placed on the second arm 22 has its own weight and the weight of the leg rest 2. Rotate downward together with the leg rest 2. At this time, the roller 13 of the first arm 21 rolls on the back plate 12 a of the leg frame 12. And the leg mounting part 2 can reach the storage position which is the lowest position (FIG. 3).

  Further, as shown in FIG. 5, when the telescopic actuator 10 stops while being extended or shortened, the telescopic actuator 10 stops the second arm 22 at that position, and the second arm 22 The main body frame 7 is tilted downward. The first arm 21 is maintained in a state of being placed on the second arm 22, and the leg frame 12 is maintained in a state of being placed on the roller 13 of the first arm 21. At the highest position (FIG. 4) or halfway position (FIG. 5), since the first arm 21 is placed on the second arm 22 from above, the first arm 21 and the second arm 22 are not rotated. It is possible to move up and down in the moving direction (see FIG. 8).

  According to the chair type massage machine having the above configuration, in FIG. 5, when the leg frame 12 of the leg rest portion 2 is rotated up and down by the leg drive unit 5, the leg frame 12 has a moment about the axis C1. M acts. Since the first arm 21 supporting the leg frame 12 from the back side is longer than the second arm 22 from the axis C3, the roller 13 of the first arm 21 is connected to the back of the leg frame 12. The leg frame 12 can be supported from the back side while in contact with the leg tip side portion of the face plate 12a. As a result, the moment arm L from the axis C3 to the support point P at which the first arm 21 supports the leg frame 12 increases, and the support force at the support point P necessary to support the leg frame 12 decreases. As a reaction force, the load acting on the back plate 12a of the leg frame 12 is also reduced. For this reason, it is not necessary to form the leg frame 12 to be particularly strong, and the back plate 12a can be made thin. That is, the leg frame 12 can be supported by the shaft member 15 of the main body frame 7 and the roller 13 of the first arm 21 at two points as far as possible from the base part in the length direction of the leg and the front side. The bending moment generated in the frame 7 can be reduced, which is structurally advantageous. If the length of the first arm 21 is short and the moment arm L is short, a large bending moment acts on the main body frame 7 at the support point P of the roller 13, which is structurally disadvantageous. As described above, when the leg (2) is supported by the arm (first arm 21) from the back side and is rotated up and down, it is preferable to set the arm long.

  However, when the first arm 21 becomes long, it becomes easy to contact the obstacle B existing between the floor surface F while the leg rest 2 is being rotated downward (see FIG. 6). As the obstacle B, for example, when using a chair type massage machine with the leg rest portion 2 in the highest position, a ball or the like may fly and sink under the leg rest portion 2. , That ball. When the telescopic actuator and the first arm are connected by a shaft as in the prior art (not shown) and the telescopic actuator directly pulls down the first arm, when the ball is sandwiched between the first arm and the floor surface Since the telescopic actuator forcibly pulls down the first arm, an excessive force acts on the first arm, the telescopic actuator and the connecting portion thereof, and there is a possibility that a problem may occur in these.

  Therefore, according to the configuration of the present invention, the first arm 21 and the second arm 22 are both attached to the front portion of the main body frame 7 so as to be rotatable around the axis C3 in the left-right direction. Is in a state where the first arm 21 is placed on top. For this reason, the second arm 22 can be separated from the first arm 21 downward in the rotation direction, and the first arm 21 is obstructed on the floor F while the first arm 21 is being rotated downward. As shown in FIG. 6, even if the ball which is the object B is contacted, the telescopic actuator 10 can continue to shorten to the end so as to pull down only the second arm 22, leaving the first arm 21. . For this reason, the expansion / contraction actuator 10 does not force the first arm 21 and the leg frame 12 to rotate downward, and an excessive force does not act on the expansion / contraction actuator 10, the first arm 21 and the leg frame 12. Can be prevented.

  Since the second arm 22 is shorter than the first arm 21 (because the turning radius is small), the second arm 22 rotated upward is compared with the first arm 21 as shown in FIG. The obstacle B is unlikely to exist between the floor surface F. In particular, the mounting bracket 7d to which the base of the second arm 22 is attached is located below and behind the upper front end of the main body frame 7 as described above. Further, a frame portion 7f that swells forward at the lower front end of the main body frame 7 is provided below the mounting bracket 7d (below the rotation trajectory of the second arm 22). Since there is a cover member (not shown) provided at the front end of the main body frame 7, there is no space for the obstacle B to enter between the second arm 22 and the floor surface F, or there is Very little if any.

  Another function of the chair type massage machine having the above configuration will be described. In FIG. 4, since the leg rest 2 supports the user's leg, the weight of the leg portion of the entire weight of the user should mainly act. For example, the leg rest 2 If the child rides only on the leg rest 2 in a state of being rotated (when weight is applied), the load acts on the leg rest 2 as an abnormal load F0. In this case, if the leg resting portion 2 maintains the posture as it is, an excessive force is applied to the leg resting portion 2, the telescopic actuator 10 and the connecting portion thereof, and there is a possibility that a malfunction may occur. Therefore, when an abnormal load F0 is applied from above to the leg resting portion 2 that is in a state of being rotated up like the highest position or midway position, the chair type massage machine moves the leg resting portion 2 downward. A retracting means for rotating is provided.

  A first form of the retracting means will be described with reference to FIG. FIG. 9 shows the tip portion of the first arm 21 and the leg frame 12 (back plate 12 a) of the leg rest 2. The retracting means 8a controls the sensor 27 for detecting an abnormal load acting on the leg rest part 2 and controls the leg rest part 2 to be rotated downward by the telescopic actuator 10 based on the detection signal of the sensor 27. And a control unit 9. When the abnormal load F0 (see FIG. 4) acts on the leg main body 11 of the leg rest 2, the load F0 is applied to the shaft member 15 of the main body frame 7 and the roller 13 of the first arm 21 via the leg frame 12. Works. In FIG. 9, the load component acting on the roller 13 is indicated as F1.

The roller 13 at the distal end of the first arm 21 is rotatably attached to an attachment member 28, and the attachment member 28 can be rotated by a first shaft 41 provided at the distal end of the first arm 21. It is attached as. That is, the attachment member 28 can be rotated around an axis that extends in the horizontal direction of the first shaft 41. Further, the attachment member 28 has a lever portion 28 a extending to the base side of the first arm 21. The sensor 27 is attached to the side surface of the first arm 21, and the sensor 27 has a sensor arm 27 a that extends to the distal end side of the first arm 21.
A second shaft 43 is attached to a part 28 b of the attachment member 28, and a third shaft 44 is attached to the first arm 21. A tension spring 46 is attached between the second shaft 43 and the third shaft 44, and this spring 46 is in a direction to move the lever portion 28a away from the sensor arm 27a (arrow in FIG. 9). The mounting member 28 is urged in the direction opposite to Q).

  4 and 9, when the load F1 due to the abnormal load F0 acts on the leg frame 12 in the state of being rotated upward, the leg frame 12 is freely rotatable around the axis C1, so that the leg frame 12 12 pushes down the roller 13 and the attachment member 28, and the leg frame 12 can change its position downward with respect to the first arm 21. That is, the leg frame 12 approaches the first arm 21. When the leg frame 12 pushes down the roller 13 and the attachment member 28, the roller 13 and the attachment member 28 are rotated around the axis of the first shaft 41 against the tension spring 46 (in the direction of arrow Q in FIG. 9). Can be rotated.

  According to the above configuration, when an abnormal load F0 is applied to the leg resting portion 2, the leg frame 12 pushes down the roller 13 and the attachment member 28 and changes its position downward with respect to the first arm 21. In other words, when the load F1 is applied to the roller 13 from the leg frame 12 due to the abnormal load F0, the roller 13 pushed by the leg frame 12 moves together with the attachment member 28 against the spring 46 (spring 26 in FIG. 12). 9 and the lever member 28a pushes down the sensor arm 27a. When the sensor arm 27a is pushed down, the sensor 27 detects this. That is, the position change of the leg frame 12 can be detected by the sensor 27. Then, when the control unit 9 receives the detection signal from the sensor 27, based on this detection signal, the control unit 9 starts control to shorten the telescopic actuator 10 and rotate the leg frame 12 downward. The control unit 9 includes a microcomputer and has a function of controlling the operation of the telescopic actuator 10.

  FIG. 12 shows a modification of FIG. In the embodiment of FIG. 12, the attachment member 28 and the spring 46 are different from those of the embodiment of FIG. In the case of FIG. 12, the attachment member 28 is attached to the distal end portion of the first arm 21 so as to be displaceable downward (downward in FIG. 12) in the rotation direction of the leg frame 12. Further, the attachment member 28 (roller 13) is elastically biased by a spring 26 upward in the rotation direction (upward in FIG. 12). Therefore, in FIG. 4 and FIG. 12, when the load F1 due to the abnormal load F0 acts on the leg frame 12 that is rotated upward, the leg frame 12 pushes down the roller 13 and the attachment member 28, and the roller 13 and the attachment are attached. As the member 28 sinks, the leg frame 12 can change its position downward with respect to the first arm 21. Thereby, the lever member 28a pushes down the sensor arm 27a, and the sensor 27 detects this push-down. Then, when the control unit 9 receives the detection signal from the sensor 27, based on this detection signal, the control unit 9 starts control to shorten the telescopic actuator 10 and rotate the leg frame 12 downward.

  9 and 12, the spring 46 (so that the sensor 27 outputs a detection signal when the load F1 acting on the roller 13 due to the abnormal load F0 reaches a predetermined value set in advance. The strength (spring coefficient) of the spring 26) is set. In other words, the deformation of the spring 46 is small and the sensor 27 does not output a detection signal only when the load (body weight) of the user's legs acts on the leg rest 2, but the load about the weight of the child is applied to the roller 13. Is applied, the spring 46 is greatly deformed, and the strength of the spring 46 is set so that the sensor 27 outputs a detection signal to the control unit 9. A specific example of setting the strength of the spring 46 is that when a load of 150 N to 250 N (15 kgf to 25 kgf) acts downward on a portion immediately above the roller 13 in a state where the leg rest portion 2 is at the highest position, The sensor 27 is set to output a detection signal. In particular, in the present invention, since the first arm 21 that supports the leg rest 2 from the back side is set long, the contact force on the roller 13 that supports the leg frame 12 can be reduced. For this reason, even if the sensor 27 is caused to function when a load about the weight of a child acts on the leg rest 2, the strength of the spring 46 can be set small (it can be a weak spring), and the sensor 27 The detection sensitivity can be increased.

  According to the retracting means 8a, when an abnormal load F0 is applied from above to the leg resting portion 2 that is in the upwardly rotated state, the leg frame 12 is positioned downward in the rotational direction with respect to the first arm 21. Change. When the sensor 27 detects this change in position, the controller 9 can shorten the telescopic actuator 10 and rotate the leg frame 12 downward. For this reason, by rotating the leg rest part 2 on which the abnormal load F0 is applied downward, the abnormal load F0 can be transferred from the leg rest part 2, and the leg driving part 5 and the leg rest part 2 are damaged. Can be prevented.

  Moreover, it is good to be comprised so that the shortening speed of the expansion-contraction actuator 10 can be changed with the function by at least one of the expansion-contraction actuator 10 and the control part 9. FIG. That is, in the chair type massage machine of the present invention, when the leg rest 2 is rotated up and down during normal massage, the telescopic actuator 10 expands and contracts at the first speed (low speed), but the controller 9 detects the sensor. When the detection signal is received from 27, the telescopic actuator 10 is preferably configured to be shortened at a second speed (high speed) faster than the first speed. As a result, when an abnormal load F0 acts on the leg rest 2, the leg rest 2 can be quickly rotated downward to control the load, and the leg rest 2 and the leg drive 5 are prevented from being damaged. Can do.

  10 and 11 are explanatory diagrams of another embodiment of the retracting means. The chair type massage machine provided with the retracting means is substantially the same as the chair type massage machine shown in FIGS. 1 and 2 except that the configuration of the arm of the leg driving unit 5 and the retracting means are different. In the leg drive unit 5 of FIG. 10, the member that exists between the leg frame 12 and the telescopic actuator 10 and supports the leg frame 12 from the back side is composed of one arm 31. The leg drive unit 5 has a base part that is pivotally attached to the second bracket 7e of the main body frame 7 and extends, as in the above embodiment (see FIG. 2). There is an extendable actuator 10 that pushes up and rotates the mounting portion 2.

  When the abnormal load as described above acts on the leg rest 2, the retracting means 8 b of FIG. 10 does not change the total length of the telescopic actuator 10 in that state, and moves the tip 10 a (tip) of the telescopic actuator 10. It has a guide part 32 that moves to the leg tip side (right side in FIG. 10) of the leg rest part 2. The specific configuration of the retracting means 8 b will be described. The guide portion 32 includes a long hole 34 provided in the side surface of the arm 31, and the long hole 34 is formed along the longitudinal direction of the arm 31. The distal end portion 10a of the telescopic actuator 10 and the arm 31 are rotatably connected by a pin member 35 having a horizontal axis, and the pin member 35 can move in the long hole 34. it can.

  An elastic member (hereinafter referred to as a spring) 36 that urges the pin member 35 toward the base (axis C3) side of the arm 31 is attached between the pin member 35 and the base of the arm 31. The spring 36 is set to a predetermined strength (spring coefficient). When the abnormal load (the predetermined load F1 is applied to the roller 13 at the tip of the arm 31 due to the abnormal load), the pin member 35 is inserted into the long hole 34. Although it can be moved to the distal end portion 34a, in the normal time when this abnormal load (load F1) is not applied, the spring can be strong enough to position the pin member 35 at the proximal end portion 34b of the long hole 34. 36 is set.

  In order to perform massage with this chair type massage machine, when the telescopic actuator 10 is extended and the leg rest 2 is rotated up and down, the spring 36 biases the pin member 35 toward the axis C3. The pin member 35 does not move to the distal end portion 34a side of the long hole 34 but is positioned on the base end portion 34b side, and the pin member 35 presses the upper surface of the long hole 34 upward to rotate the arm 31 upward. Can do. Thereby, the leg mounting part 2 can be rotated up. Further, when the leg rest portion 2 is rotated downward, when the telescopic actuator 10 is shortened, the pin member 35 is positioned on the base end portion 34b side of the elongated hole 34, and the arm 31 is rotated by the pin member 35 in the rotation direction. The arm 31 can be rotated downward. Thereby, the leg mounting part 2 can be rotated below.

  However, as shown in FIG. 10, when the abnormal load is applied to the leg rest 2, the leg frame 12 pushes the roller 13 at the tip of the arm 31 with the load F1 due to the abnormal load. Acts to rotate downward about the axis C3. At this time, the pin member 35 of the distal end portion 10a of the telescopic actuator 10 can move (retract) to the front side in the length direction of the arm 31 along the long hole 34 against the spring 36. As shown in FIG. 11, as the pin member 35 moves, the arm 31 rotates downward about the axis C3, and the telescopic actuator 10 in that state does not change its length. The end portion 10b can be rotated downward about the rotation center. As a result, the leg rest 2 can also rotate downward about the axis C 1, the abnormal load can be instantaneously transferred from the leg rest 2, and the leg rest 2 and leg drive 5 Breakage can be prevented.

  10 and 11, the case of having one arm 31 has been described. However, as in the embodiment of FIG. 2, two arms (first arm 21 and second arm 22) are provided. The retracting means 8b shown in FIG. 10 may be applied to the chair type massage machine instead of the retracting means 8a shown in FIG. In this case, the long hole 34 and the spring 36 may be provided in the second arm 22.

FIG. 13 is a perspective view of the main body frame 7 and the leg drive unit 5 provided in the chair type massage machine of another embodiment. FIG. 14 is a cross-sectional view of a main part of the leg driving unit 5. In FIG. 14, the first arm 21 and the second arm 22 are illustrated as being separated.
In FIG. 13, the structure of the main body frame 7 is the same as that of the embodiment of FIG. Moreover, the leg drive part 5 is provided with the function to rotate the leg mounting part 2 (refer FIG. 1) up and down around the axial center C1 similarly to embodiment of FIG. That is, the leg drive unit 5 rotates around the same axis C3 as the telescopic actuator 10 and the first arm 21 attached to the mounting bracket 7d of the main body frame 7 so as to be rotatable around the axis C3 in the left-right direction. And a second arm 22 mounted for movement. The first arm 21 and the second arm 22 are separately and independently rotatable about the same axis C3, and the first arm 21 can freely rotate.

  The difference from the embodiment of FIG. 2 is that the first arm 21 of FIG. 13 is configured to have a width in the left-right direction larger than the thickness (in the rotational direction), and the second arm 22 is also correspondingly wider. It is a point that is configured. By making the first arm 21 and the second arm 22 wide, the strength can be increased, and by making the width wide, the rollers 13 can be provided on both the left and right ends of the front portion of the first arm 21, respectively. The pair of left and right rollers 13 can stably support the leg rest 2 (see FIG. 1) in the left-right direction.

  Further, the first arm 21 is formed by a contact plate 21a facing the front or upper side of the first arm 21 and a reinforcing plate 21b bent from the left and right sides of the contact plate 21a toward the main body frame 7 side. A box structure opened to the telescopic actuator 10 side is obtained. Therefore, a sensor 27 similar to that of the above-described embodiment (FIG. 9) is housed in the box-shaped first arm 21 as shown in FIG. Thus, in the embodiment of FIG. 14, the first arm 21 can cover and protect the sensor 27.

In FIG. 14, the roller 13 at the distal end of the first arm 21 is rotatably attached to an attachment member 28, and the attachment member 28 is rotated by a shaft 41 provided at the distal end of the first arm 21. Installed as possible. The attachment member 28 is formed long in the left-right direction (see FIG. 13), and the rollers 13 are located on both the left and right sides of the attachment member 28.
The attachment member 28 has a contact portion 28 c at a position on the base side of the first arm 21. The sensor 27 is attached to an internal member 23 inside the first arm 21, and the sensor 27 has a sensor arm 27 a extending to the tip end side of the first arm 21. A coil spring (not shown) is attached to the shaft 41, and this coil spring urges the attachment member 28 in a direction in which the contact portion 28c is to be separated from the sensor arm 27a.

  When an abnormal load is applied from above to the leg frame 12 that is rotated upward, and the load F1 is applied by this abnormal load, the leg frame 12 can freely rotate about the axis C1 (see FIG. 13). For this reason, the leg frame 12 pushes down the roller 13 and the mounting member 28. As a result, the roller 13 and the attachment member 28 rotate around the axis of the shaft 41 (in the direction of arrow Q in FIG. 14) against the coil spring. Thereby, the contact part 28c pushes down the sensor arm 27a, and the sensor 27 detects this. And the control part 9 receives the detection signal from the sensor 27, and based on this detection signal, the control part 9 starts control which shortens the expansion-contraction actuator 10 and rotates the leg frame 12 below. As described above, the chair-type massage machine of FIG. 13 also has a retracting means for rotating the leg rest 2 downward when an abnormal load is applied to the leg rest 2 in a state of being swung upward. It has.

  The first arm 21 in FIG. 14 rotates with respect to the mounting bracket 7d on the fixed side, but between the proximal end 21e of the first arm 21 and the distal end 7j of the mounting bracket 7d, This massage machine has a pinching prevention unit that prevents a part (for example, fingers) from being pinched. The pinch prevention portion is a portion extending from the internal member 23 in the first arm 21 and includes an arc wall portion 24 formed in an arc shape centering on the axis C3. As shown in FIG. 13, the arc wall portion 24 is formed over substantially the entire length of the first arm 21 in the left-right direction. And even if the 1st arm 21 rotates around the axial center C3, the outer peripheral surface of the circular arc wall part 24 is in the state which adjoined to the said front-end | tip 7j of the attachment bracket 7d in a full rotation stroke, and circular arc. Since at least the front end portion 24a of the wall portion 24 is housed in the mounting bracket 7d, it is possible to prevent fingers and the like from being pinched.

  As described above, according to each of the embodiments of the present invention, when the leg rest portion 2 is rotated downward, as shown in FIG. Even if the object B is contacted, an excessive force does not act on the leg rest 2 and the leg drive 5 and the like, so that it is possible to prevent a malfunction of the device for rotating the leg rest 2 up and down. Further, even if an abnormal load is applied to the leg rest 2 from above, the abnormal load can be transferred by the leg rest 2, and the occurrence of a malfunction of the device for rotating the leg rest 2 up and down can be prevented. be able to.

  Moreover, in the said embodiment, although the expansion-contraction actuator 10 of the leg drive part 5 was demonstrated as a structure which has a nut member and a screw rod, the actuator which rotates the leg mounting part 2 up and down may be other than this. An air cell that expands or contracts by supplying or discharging air may be used. That is, an air cell is interposed between the front part of the main body frame 7 and the leg frame 12 of the leg resting part 2, and air is supplied to the air cell by an air supply unit provided in the main body frame 7, so that the air cell is By inflating, the leg rest part 2 can be pushed up and rotated. And if the air of an air cell is exhausted, the leg mounting part 2 will rotate below. According to the leg driving unit 5, when the abnormal load is applied to the leg mounting unit 2, the abnormal load is detected by a sensor attached to the leg mounting unit 2 or the main body frame 7, and based on the detection signal. If the air supply unit is brought into an exhausted state by the control unit 9 so that the air in the air cell can be exhausted, the air cell can be quickly contracted by the load of the leg mounting unit 2. It can be rotated downward more quickly than sometimes rotating. Therefore, even if an abnormal load is applied to the leg rest 2, the abnormal load can be applied from the leg rest 2.

  Moreover, the chair type massage machine of this invention is not restricted to the form to show in figure, The thing of another form may be sufficient within the scope of the present invention. In the embodiment (FIG. 1), the case where the air cell as a massage tool is provided in the leg main body 11 of the leg rest 2 is described, but at least one of the seat 1 and the leg main body 11 is massaged. It only has to be provided. And although not shown in figure, a massage tool may have an arm which attached the treatment element to the edge part, and a drive part which drives this arm other than an air cell. Moreover, the backrest part 3 may be provided with a massage tool.

It is a perspective view which shows one Embodiment of the chair type massage machine of this invention. It is a perspective view of a main body frame and a leg drive part. It is a side view of a leg mounting part, a main body frame, and a leg drive part, and has shown the state which has a leg mounting part in a storing position. It is a side view of a leg mounting part, a main body frame, and a leg drive part, and has shown the state which has a leg mounting part in the highest position. It is a side view of a leg mounting part, a main body frame, and a leg drive part, and has shown the state which has a leg mounting part in the middle position. It is a side view of a leg mounting part, a main body frame, and a leg drive part, and has shown the state where the 1st arm contacted the obstacle. It is explanatory drawing of a 1st arm, a 2nd arm, and its peripheral part. It is explanatory drawing of a 1st arm, a 2nd arm, and its peripheral part. It is explanatory drawing explaining the 1st form of an evacuation means. It is explanatory drawing of the other form of an evacuation means. It is explanatory drawing of the other form of an evacuation means. It is explanatory drawing which shows the modification of the evacuation means of FIG. It is a perspective view of a main part frame and a leg drive part with which a chair type massage machine of other embodiments is provided. It is sectional drawing of the principal part of a leg drive part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat part 2 Leg mounting part 5 Leg drive part 6 Massage tool 7 Main body frame 8a, 8b Retraction means 9 Control part 10 Telescopic actuator 11 Leg main body part 12 Leg frame 13 Roller 21 First arm 22 Second arm 27 Sensor 31 Arm 32 Guide part C1 Rotation axis C3 of the leg rest part Rotation axis F of the first and second arms F Floor

Claims (3)

A body frame placed on the floor,
A seat provided on the main body frame and seated by a user;
A leg rest attached to the front part of the main body frame so as to be rotatable around a lateral axis;
A leg drive unit for rotating the leg rest part up and down around the axis;
A massage device provided with at least one of the seat part and the leg rest part,
When an abnormal load is applied from above to the leg rest in a state of being rotated upward, the leg rest is provided with a retracting means for rotating the leg rest downward .
The retracting means includes a sensor for detecting the abnormal load, and a control unit for controlling the leg mounting unit to rotate downward by the leg driving unit based on a detection signal of the sensor. Have
A chair-type massage machine.
A body frame placed on the floor,
A seat provided on the main body frame and seated by a user;
A leg rest attached to the front part of the main body frame so as to be rotatable around a lateral axis;
A leg drive unit for rotating the leg rest part up and down around the axis;
A massage device provided with at least one of the seat part and the leg rest part,
When an abnormal load is applied from above to the leg rest in a state of being rotated upward, the leg rest is provided with a retracting means for rotating the leg rest downward.
The leg drive unit has a telescopic actuator that pushes and rotates the leg rest by rotating and extending a base part to the main body frame.
When the abnormal load is applied, the retracting means rotates the leg rest part downward by moving the tip part of the telescopic actuator toward the leg tip side of the leg rest part without changing the overall length of the telescopic actuator. A chair type massage machine having a guide part to be moved.
A body frame placed on the floor,
A seat provided on the main body frame and seated by a user;
A leg rest portion having a leg main body portion on which a user puts a leg, and a leg frame that supports the leg main body portion and is attached to the front portion of the main body frame so as to be rotatable around an axis in the left-right direction;
A leg driving unit that rotates the leg frame up and down around the axis;
A massager provided with at least one of the seat part and the leg main body part,
When an abnormal load is applied from above to the leg rest that is in the state of being rotated upward, the leg rest further includes a retracting means for rotating the leg rest downward.
The leg drive unit is
A first arm attached to the front part of the main body frame so as to be rotatable about a horizontal axis, and supporting the leg frame from the back side;
It is attached to the front part of the main body frame so as to be rotatable around a horizontal axis, and can support the first arm from the back side, and is separated downward in the rotation direction from the first arm. A possible second arm,
A telescopic actuator that pushes up the second arm by extending to rotate around the axis and shortens the second arm to rotate around the axis by shortening ;
As the tip of the first arm is located on the leg tip side of the leg-rest portion than the tip of the second arm, the first arm has a length Kuna' than the second arm,
The leg frame is provided such that when the abnormal load is applied, the leg frame changes its position downward with respect to the first arm,
The retracting means includes a sensor that detects the position change, and a control unit that controls to shorten the telescopic actuator and rotate the leg frame downward based on a detection signal of the sensor. .

Images