Massage apparatus

Abstract

[Problem] To reduce the time required for centering work and improve assembly work efficiency for a massage device when supporting a shaft that moves a jet part having a jet nozzle, and to reduce costs without hindering movement of the jet nozzle. [Solution] This massage apparatus comprises: a rotary drive part (11); a shaft (9), one end (9a) of which is rotatably connected to the rotary drive part (11) and is supported by a bearing (27), and the other end (9b) of which extends in one direction inside a liquid tank (1); threaded gears (25A, 25B) disposed on the shaft (9); a jet part that is able to move along the shaft (9) with the threaded gears (25A, 25B), has a jet nozzle at the top, and can be rotated by the rotation of the threaded gears (25A, 25B); and a support mechanism that supports the other end (9b) of the shaft (9) in a non-fixed state.

Description

technical field [0001] The invention relates to a massage device which uses jet hydraulic pressure to massage the neck, trunk and lower limbs of a human body lying on its back. Background technique [0002] Conventionally, as a massage device for massaging a human body, a massage device utilizing hydraulic pressure such as water pressure jetted from a jet port (jet nozzle) is known. This massage device is a device as follows (for example, refer to Patent Document 1): a flexible sheet is tensioned above the upper opening of a substantially rectangular parallelepiped liquid tank, and the flexible sheet is directed toward the flexible sheet from an injection port arranged in the liquid tank. The lower surface of the flexible sheet ejects jet liquid, thereby giving stimulation to a massage subject lying on the flexible sheet for treatment. [0003] The massage device is provided with jet port moving mechanisms for moving the jet ports in the longitudinal direction and the short...

AI Technical Summary

Problems solved by technology

[0006] The existing massage device has the following problems: Since the two ends of the threaded shaft are rotatably fixed and supported on the bearing unit, the requirements for the size of the threaded shaft and the processing of the end of the threaded shaft inserted into the bearing unit are relatively high. If the centering accuracy of the threaded shaft is poor, the threaded shaft cannot rotate properly, which will cause trouble for the smooth running of the trolley or the power of the rotating motor cannot be reliably transmitted to the worm wheel. As a result, the rotation of the gear bring bad influence

[0007] In addition, there is a problem that if the moving motor or the turning motor is continuously driven in a state where the centering accuracy is poor, a load exceeding a specified value is applied to the motor, which may cause motor failure such as burnout.

[0008] Furthermore, during the assembly operation in the manufacturing factory of the massage device, the centering adjustment operation of the threaded shaft takes a long time, and this operation becomes one of the main factors that deteriorate the assembly workability of the massage device, and the assembly workability needs to be improved.

[0009] In addition, there is also the following problem: for the screw shaft used to rotate the injection port moving mechanism in the short side direction, when the rotation motor is driven, in order to reduce the stress imposed on the one end side of the screw shaft and the rotation motor. For the thrust load of the bearing unit on one side, the end face of the other end side of the threaded shaft is pressed toward the direction of the rotation motor by using the end block made of resin, but this will increase the number of parts and become a major cause of cost increase. , and the end block wears due to friction caused by the rotation of the threaded shaft so that the pressing force gradually decreases

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