JPH10328258A - Kneading ball of massage machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a kneading ball from being separated by large load by covering both sides of the inner peripheral part of the kneading ball with a bearing member, integrally providing a ring made of a rigid body in the inner peripheral part, and freely turning the kneading ball round the axis by the bearing member. SOLUTION: An annular kneading ball 1 is installed on the outer periphery of a shaft part 20 of an arm 2 through bearing members 3, 4. A metallic cylindrical ring 5 is integrally provided in the inner peripheral part of the kneading ball 1. The ring may be not made of metal as far as it has enough strength and rigidity. Plural rings 5 which are not cylindrical may be integrally formed at spaces in the axial direction. The ring 5 has the axial length substantially equal to the axial length of the inner peripheral part of the kneading ball 1 and is fixed to the kneading ball 1, whereby the inner peripheral part can be prevented from floating from the outer peripheral surface of the bearing member 4 of the inner peripheral part under the load (reaction force) F of the kneading massage load. Accordingly, the kneading ball 1 cannot be detached even with large load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kneading ball, which is a part of a massage machine that contacts a human body and applies pressure to the human body.

[0002]

2. Description of the Related Art Various types of massage machines have been provided, and there is a massage machine in which roller-shaped kneading balls are rotatably mounted on respective ends of a pair of arms. FIG. 2 shows a conventional example. An annular kneading ball 1 made of an elastic material is mounted on the outer periphery of a shaft portion 20 at the tip of the arm 2 via a bearing member 3 and a bearing member 4. The bearing member 3 is caulked and fixed to the shaft portion 20, and the kneading balls 1 are rotatable with respect to the shaft portion 20 and the bearing member 3 together with the bearing member 4 that is in contact with both inner peripheral side surfaces. The bearing member 4 is constituted by a pair of members 40, 40 which are combined in the axial direction.

[0003] Kneading balls 1, 1 attached to the respective ends of a pair of arms 2, 2 driven as shown in FIG. 3 by a driving means (not shown) mounted on the back of a chair, etc.
Apply pressure to the back of the human body as a massaging massage. Further, when the arm is moved up and down along the back of the chair, the kneading balls 1 and 1 that are in contact with the back of the human body roll on the back of the human body by rotating with respect to the arm 2.

[0004]

Here, when performing the above-mentioned massaging massage, a load F is applied to the massaging ball 1 from an oblique direction as shown in FIG. 2, and when the load F becomes large. When the kneading ball 1 is deformed, one end in the axial direction on the inner peripheral side thereof rises from the outer peripheral surface of the bearing member 4, and sometimes the kneading ball 1 comes off from the bearing member 4.

[0005] The present invention has been made in view of such a point, and an object of the present invention is to provide a massaging ball of a massage machine which does not come off even if the load is increased.

[0006]

The massaging balls of the massage machine according to the present invention are attached to a shaft via bearing members covering both side surfaces of the inner peripheral portion, and are rotatable around the shaft. A feature is that a ring formed of a rigid body is provided integrally on the inner peripheral portion. Since the ring prevents the inner peripheral portion of the kneading ball from floating from the bearing member, the kneading ball does not come off from the bearing member.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described. As shown in FIG.
The point that the kneading balls 1 are mounted on the outer periphery of the kneading balls via the bearing members 3 and the bearing members 4 is the same as in the above-described conventional example, but the annular kneading balls 1 here have a metal cylinder on the inner peripheral part thereof. The ring 5 is inserted by integrally molding. The ring 5 whose axial length is substantially the same as the axial length of the inner peripheral portion of the kneading ball 1 and which is fixed to the kneading ball 1 is driven by the arm 2 to move the kneading ball 1. In response to a load F acting as a reaction force when massaging and massaging a human body, the inner peripheral portion of the massaging ball 1
To prevent the kneading balls 1 from coming off the bearing member 4 even if the load F becomes large.

The ring 5 need not be made of metal as long as it has sufficient strength and rigidity. Further, the ring 5 may not be cylindrical, but in this case, it is preferable that a plurality of rings 5 are integrally formed at intervals in the axial direction.

[0009]

As described above, the kneading ball according to the present invention is provided with a ring formed of a rigid body integrally on the inner peripheral portion, so that even if an excessive load is applied from the side in an oblique direction, The ring prevents the inner peripheral portion of the kneading ball from floating from the bearing member, and therefore, the kneading ball does not come off from the bearing member. It is ensured that pressure is applied to the human body.

[Brief description of the drawings]

FIG. 1 is a sectional view of an example of an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional example.

FIG. 3 is an operation explanatory diagram of the above.

[Explanation of symbols]

 1 kneading ball 4 bearing member 5 ring

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naomi Kusano 1048 Odomo Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (1)

[Claims] An inner peripheral portion is attached to a shaft so as to be rotatable around the shaft via bearing members that cover both side surfaces of the inner peripheral portion, and a ring formed of a rigid body is integrally provided on the inner peripheral portion. The massage machine is characterized by the massage balls.