JP3131230B2 - Pressing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing device for acupressure massage which performs pressing by linear reciprocating motion using a crank means.

[0002]

2. Description of the Related Art A pressing device which performs pressing by linear reciprocating motion using a crank means is widely used in acupressure mechanisms of acupressure massage machines and the like. As shown in FIG. 6, for example, as shown in FIG. 6, the acupressure mechanism as one of the conventional pressing devices of this type includes a pin c provided at a base of a acupressure arm b having a acupressure projection a at a tip thereof and a groove of a grooved heart cam d. The finger pressure arm b is reciprocally driven by rotating and driving the grooved heart cam d while sliding into the inside e, and the shoulder or back of the person to be massaged is pressed by the finger pressure projection a.

[0003]

In this type of pressing device, taking the above-mentioned acupressure mechanism as an example, after the acupressure protrusion a is pushed deepest into the shoulders and back, when the pushing becomes shallow, a heart cam with a groove is required. Due to the backlash of the gear intervening in the rotation drive of d, the reduction of the pressing force exerted on the shoulder, the back, and the like by the acupressure projection a becomes discontinuous, thereby causing play. for that reason,
In the case of such an acupressure mechanism, the person receiving the massage felt uncomfortable.

The space required in the reciprocating direction of the pressing device as described above is substantially equal to the length of the acupressure arm b in the moving direction, the length of the reciprocating motion, and the grooved heart cam d.
And the maximum eccentric distance of the inner circumference of the groove e. Therefore, for example, when the above-described acupressure mechanism is provided in the back portion of the chair-type massage machine, the back portion requires a considerable thickness,
It did not meet the demand for compactness.

The present invention has been made in view of the above-mentioned problems in the prior art, and an object of the present invention is to make it possible to prevent a pressing portion from being pressed when the pressing portion becomes shallow. It is an object of the present invention to provide a pressing device for acupressure massage , in which discontinuity of reduction of a pressing force applied to a body is eliminated, and which is more compact.

[0006]

In order to achieve the above object, a pressing device for acupressure massage according to the present invention has a sliding portion having a constant crank radius and is rotated by a gear. A linear reciprocating member having a pressing portion and a guide groove means is rotated by a crank means, whereby the sliding section is rotated while sliding in the guide groove means, whereby the linear reciprocating member is reciprocated. A pressing device in which the pressing portion cooperates to press and release the pressed object, wherein the guide groove means includes: an arc portion; and a tangential line having an axis extending tangentially from one end of the arc portion. And a pushing portion whose axis extends outward from the other end of the arc portion, and the axis of the arc portion extends along an arc having a radius equal to the crank radius at the most pushed position of the linear reciprocating member. Tangential perpendicular to the direction of movement of the linear-reciprocating member at the other end, even center angle Thus is assumed to be an acute angle.

[0007]

When the sliding means slides on the pushed part and the linear reciprocating member reaches the most pushed position and then the crank means is driven to rotate in the direction in which the sliding part slides on the arc part, the sliding part is guided. The linear reciprocating member is reciprocally driven by rotating at a constant crank radius while sliding in the groove means, and the pressing portion presses and releases the pressed object.

[0008] Since the axis of the circular arc portion is along the circular arc having the radius of the crank at the most pushed position of the linear reciprocating member, the linear reciprocating member reaches the most pushed position and pushes the pressing member deepest into the pressed body. After the pushing, while the sliding portion slides along the arc portion, the pushed state is maintained at the most pushed position. When the sliding portion moves from the arc portion to the tangential portion, the pushing of the pressing portion becomes shallower, and the pushing is released by the rotation of the crank means.

The axis of the arc portion is such that the tangential direction of the end on the pushing portion side is orthogonal to the direction of movement of the linear reciprocating member, and the central angle is an acute angle, while the other end extends in the tangential direction. Regardless of the backlash of the gear that is interposed in the rotational drive of the crank means, the reduction in the pressing force applied to the pressed body by the pressing portion when the pressing portion is shallower is irrespective of the backlash of the gear interposed in the rotational driving of the crank means. Continuity is almost eliminated. The space required in the direction of motion of the linear reciprocating member is substantially the sum of the length of the linear reciprocating member in the direction of motion and the length of the reciprocating motion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIGS. 1 to 5 relate to an acupressure device according to an embodiment of the present invention.
4 to 4 are schematic side views of main parts of the acupressure device, and FIG. 5 is a graph showing the relationship between the angular displacement of the crank (horizontal axis) and the displacement of the acupressure protrusion (vertical axis).

Reference numeral 10 denotes a crank. Reference numeral 12 denotes a shaft, reference numeral 14 denotes an arm, and reference numeral 16 denotes a pin (sliding portion). The shaft 12 is driven to rotate by a motor (not shown) via a gear (not shown). Rotates at a constant crank radius. 18 is an acupressure arm (linear reciprocating member)
It is. An acupressure protrusion 20 (pressing portion) is protruded from the distal end of the acupressure arm 18.
A guide groove 22 is provided.

Reference numeral 24 denotes a linear guide. The acupressure arm 18 is supported by the linear guide 24 so as to be able to reciprocate linearly. The pin 16 of the crank 10 is slidably fitted in the guide groove 22. Crank 10
Is rotationally driven, the pin 16 rotates in a constant crank radius while sliding in the guide groove 22, and the acupressure arm 18 is linearly reciprocally driven, and the acupressure part is applied to the shoulder or back of the person to be massaged. 20 is pushed in and released.

The guide groove 22 includes an arc portion 26, a tangent portion 28 whose axis extends tangentially from one end of the arc portion 26, and a pushing portion 30 whose axis extends tangentially from the other end of the arc portion 26. Having.

The axis of the arc portion 26 follows an arc centered on the shaft 12 and having a radius equal to the crank radius when the acupressure arm 18 is at the most depressed position as shown in FIG.
The range of the arc portion 26 is a range of a central angle of 65 ° counterclockwise from the portion where the pin 16 is located in FIG.
Therefore, the tangential direction at the other end, that is, the axial direction of the pressed portion 30 is orthogonal to the direction of linear movement of the acupressure arm 18. The distance between both ends of the guide groove 22 in a direction orthogonal to the direction of linear movement of the acupressure arm 18 is at least a distance obtained by adding the radius of the pin 16 to the crank radius.

As is apparent from FIGS. 1 to 4, the space required for the pressing device is substantially equal to the sum of the length of the acupressure arm 18 in the movement direction and the stroke of the reciprocating motion in the movement direction of the acupressure arm 18. And in a direction perpendicular to that, the stroke is slightly longer than the reciprocating stroke. When the linear reciprocating motion of the same stroke is realized by using the grooved heart cam d as shown in FIG. 6, in the motion direction of the acupressure arm b, the length of the acupressure arm b in the motion direction, the length of the stroke, and the groove Heart cam d
Is the sum of the minimum eccentric distance of the inner periphery of the groove e and the maximum eccentric distance thereof, and the minimum eccentric distance of the outer periphery of the grooved heart cam d and the maximum eccentric distance thereof in a direction perpendicular thereto. Becomes Also, since the crank 10 has a considerably smaller radius than the grooved heart cam d, the torque of the electric motor required to obtain the same pressing force can be small. Therefore, if the number of rotations is the same, the output of the motor is also small, and it is possible to realize a reduction in the size and power consumption of the motor.

It should be noted that the axis of the pushing portion 30 needs to extend from the other end of the arc portion 26 to the outer peripheral side of the circumference obtained by extending the axis with the same radius of curvature. This is because the acupressure arm 18 takes the most depressed position when the pin 16 is located at the arc portion 26.

The crank 10 is driven by a motor through a gear.
When the shaft 12 is driven to rotate counterclockwise in the figure, the following operation is performed. 0 ° crank angle displacement in FIG.
In the state shown in FIG. 3, that is, in the state shown in FIG.
Retreats the most.

Next, when the pin 16 slides on the pushing portion 30, the acupressure projection 20 gradually advances in the pushing direction, that is, rightward in the drawing. FIG. 4 shows a state where the crank angle displacement is about 120 °. Fig. 1 (Crank angle displacement 1
80 °), the pin 16 is pushed into
When the pressure reaches the boundary between the
Reaches the most pushed position, and pushes the acupressure projection 20 deepest into the shoulder, back, etc.

Thereafter, while the crank 10 rotates to the crank angle displacement of 245 °, the pin 16 slides on the arc portion 26, so that the pushed state is maintained at the most pushed position. Next, when the pin 16 moves from the arc portion 26 to the tangential portion 28, the pushing of the acupressure projection 20 becomes shallower, and the pushing is released as the rotation of the crank 10 proceeds. FIG. 2 shows a state where the crank angle displacement is about 250 °.

The arc portion 26 starts from the position of the pin 16 at a crank angle displacement of 180 °, that is, an angle at which the crank radius coincides with the pushing direction of the acupressure arm 18, and the crank radius becomes an angle orthogonal to the pushing direction of the acupressure arm 18. Before the arc portion 26 ends and the sliding in the arc portion 26 ends, the pin 16 slides on the tangential portion 28 in the tangential direction, so that regardless of the backlash of the gear intervening in the rotational driving of the crank 10, Shiatsu protrusion 2
Regarding a decrease in the pressing force exerted on the shoulder, back, etc. by the acupressure projection 20 when the pressing of 0 becomes shallow, discontinuity is almost eliminated, and the person receiving the massage does not feel uncomfortable.

[0021]

According to the pressing device for acupressure massage of the present invention, after the pressing portion is pressed deepest into the pressed member, the pressed state is maintained at the most pressed position for a certain period of time. Irrespective of the backlash of the gear interposed in the rotation drive of the means, the discontinuity of the reduction of the pressing force exerted on the pressed body by the pressing part when the pressing of the pressing part becomes shallow is almost eliminated. Therefore, for example, when used for acupressure movement in a massage machine, there is almost no sense of incongruity due to discontinuity of the pressing force decrease,
Since the most depressed state is maintained for a certain period of time, the state is closer to the actual state of the acupressure.

Furthermore, the space required in the direction of motion of the linear reciprocating member is substantially the sum of the length of the linear reciprocating member in the direction of motion and the length of the reciprocating motion. It is more compact in the direction of movement than the device. Therefore, for example, the thickness of the backrest portion of the chair-type massage machine can be reduced to make the whole compact. Also, since the crank means need only be a very small one with a smaller radius than the conventionally used cam, the torque of the rotary drive means required to obtain the same pressing force can be small. Therefore, if the number of rotations is the same, the output of the rotation driving means may be small, and the rotation driving means can be reduced in size and energy consumption can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a main part of an acupressure device.

FIG. 2 is a schematic side view of a main part of the acupressure device.

FIG. 3 is a schematic side view of a main part of the acupressure device.

FIG. 4 is a schematic side view of a main part of the acupressure device.

FIG. 5 is a graph showing the relationship between the angular displacement of the crank (horizontal axis) and the displacement of the acupressure protrusion (vertical axis).

FIG. 6 is a schematic side view of a conventional acupressure mechanism.

[Description of sign]

 DESCRIPTION OF SYMBOLS 10 Crank 12 Pin 18 Acupressure arm 20 Acupressure projection 22 Guide groove 24 Linear guide 26 Arc part 28 Tangential part 30 Push-in part

Claims (1)

(57) [Claims] 1. A crank means having a sliding portion with a constant crank radius and being rotationally driven via a gear, and a linear reciprocating member having a pressing portion and a guide groove means, wherein the crank means is rotationally driven. As a result, the linear reciprocating member is reciprocally driven by the sliding portion rotating while sliding in the guide groove means, and the pressing portion is linked so as to push into and release the pressed object. The guide groove means, wherein the guide groove means has an arc portion, a tangent portion whose axis extends tangentially from one end of the arc portion, and a pushing portion whose axis extends outward from the other end of the arc portion, The axis of the arc portion is along the arc having the radius of the crank at the most pushed position of the linear reciprocating member, the tangential direction at the other end is orthogonal to the direction of motion of the linear reciprocating member, and the central angle is also Sharp angle Shiatsu massage <br/> pressing device, characterized in that.