JPH0730582U - Electric motor with torque control function in massage machine - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents overheating of the electric motor by controlling the torque of the electric motor used in the massage machine and shifting the electric motor from a large torque at startup to a small torque during normal operation. I did it. [Structure] In the power supply circuit of the capacitor induction type electric motor M of the massage machine 1, the second capacitor C2 is connected in parallel with the first capacitor C1 and the temperature of the electric motor M is detected by the second capacitor C2.
Two were connected in series.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric motor with a torque control function in a massage machine in which the starting torque of the electric motor provided in the massage machine is made stronger than the torque in normal operation.

[0002]

[Prior art]

 Since the chair-type massage machine mainly has a massage mechanism in the backrest part, in the past it was only possible to swing the massage balls by this mechanism, but in recent years, various functions have been added, for example, In addition to rotating the roller, it tends to be multifunctional, such as vibrating or swinging while rotating, and the mechanism for that is becoming more complex.

In order to deal with this, a large number of electric motors may be used according to various functions, but due to reasons such as commercial cost and installation space, one electric motor tries to cope with this multi-functionalization. is the current situation.

[0004]

[Problems to be solved by the device]

 By the way, in order to operate a massage machine of recent years, which has a complicated mechanism and uses a lot of electronic parts such as ICs in a low temperature environment, it is necessary to operate the electric motor with a large torque at the time of startup, but the normal operation is required. If the large torque at start-up is continued after entering the motor, the motor will be overheated significantly and it will be necessary to enhance the forced cooling. However, during this normal operation, a large torque is not required at start-up, so it is convenient to reduce the motor torque at the time of transition from start-up to normal operation.

The present invention performs torque control of the electric motor used in such a massage machine, and shifts the electric motor from a large torque at the start to a small torque at the normal operation to prevent overheating of the electric motor. An object of the present invention is to provide an electric motor with a torque control function in a massage machine that is prevented.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the electric motor with torque control function of the massage machine of the present invention connects the second condenser in parallel with the first condenser in the power supply circuit of the condenser induction type electric motor M of the massage machine. Then, a thermostat for detecting the temperature of the electric motor was connected in series to the second capacitor.

[0007]

[Action]

 With the above configuration, before the temperature of the capacitor induction type electric motor reaches a predetermined temperature, the thermostat is not cut off, and in this state, the first capacitor and the second capacitor connected in parallel are added to each other so that the electric motor Although the torque is increased, when the electric motor M exceeds a predetermined temperature, the thermostat is cut off and the second capacitor is de-energized, and only the first capacitor acts on the electric motor to operate at low torque. Like

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a view showing the rear surface of a chair-type massage machine using an electric motor with a torque control function according to the present invention. FIG. 2 is a circuit diagram of an electric motor with a torque control function according to the present invention.

In FIG. 1, an electric motor M is fixed to a lower back portion of a backrest 2 of a chair-type massage machine 1, and a pulley 4 is fixed to a lower end of a rotary shaft 3 of the electric motor M. . A longitudinally long feed screw 5 is rotatably provided in the center of the backrest 2 in parallel with the rotary shaft 3 of the electric motor M. A pulley (not shown) is fixed to the lower end of the feed screw 5, and the pulley and the pulley 4 of the electric motor M are connected via a belt 6.

A roller mechanism 7 is screwed onto the feed screw 5, and the roller mechanism 7 is guided in the vertical direction along rails 8 and 8 fixed to the center of the backrest 2.

With such a configuration, when the electric motor M is driven, the feed screw 5 rotates via the pulley 4, the belt 6, and the pulley 5a, and the roller mechanism 7 moves up and down along the rails 8 and 8. Move.

The roller mechanism 7 is provided with a roller (not shown) and a mechanism for rotating or swinging the roller, and the roller is driven by the rotation of the feed screw 5. Limit switches 9 are provided on the upper and lower sides of the track of the roller mechanism 7 to control the vertical movement of the roller mechanism 7.

Further, a cooling fan 10 is fixed to the rotary shaft 3 of the electric motor M while the pulley 4 is provided. The cooling fan 10 constitutes a low-speed cooling fan 10 that rotates at the same speed as the rotation of the electric motor M, and sends the wind generated by the cooling fan 10 toward the electric motor M.

A rotation transmission mechanism 11 is provided above the electric motor M. Although the internal mechanism of the rotation transmission mechanism 11 is not shown, a large-diameter pulley fixed to the upper end of the rotary shaft 3 of the electric motor M and a small-diameter pulley attached to the rotary shaft 3 and supported by the support shaft. The outer diameter of the small-diameter pulley is smaller than that of the large-diameter pulley, the large-diameter pulley and the small-diameter pulley are connected by a belt, and the cooling fan 12 is fixed to the outer end of the support shaft. In this configuration, the rotation of the electric motor M 1 is transmitted to the rotation of the high-speed cooling fan 12 which is accelerated by the cooling fan 10 below.

In the above configuration, a cooling device that uses both the low-speed cooling fan 10 and the high-speed cooling fan 12 is provided, but in the present embodiment, as will be described later, the motor is in operation. Since the power supply circuit for the electric motor M that suppresses the temperature rise is provided, only one of the cooling fans 10 and 12 may be provided.

The power supply circuit of the electric motor M of this embodiment is as shown in FIG.

In the figure, the capacitor induction type electric motor M is provided with an auxiliary winding M2 in addition to the main winding M1, and the first capacitor C1 is connected in series with this auxiliary winding M2, and further the first winding C1 is connected. A second capacitor C2 is connected in parallel with the capacitor C1 via a thermostat T2.

The main winding M1 and the auxiliary winding M2 are connected in parallel with the AC power supply V. An overload protection device T1 is provided on one side of the AC power supply V and a forward / reverse changeover switch S is provided on the other side. It is connected.

The overload protection device T1 operates when the electric motor M exceeds 130 ° C. to disconnect the circuit, and the thermostat T2 operates when the electric motor M exceeds 70 ° C. to disconnect the circuit. I am doing it.

In such a configuration, when the forward / reverse rotation changeover switch S is connected to one side and the electric motor M does not exceed 70 ° C. at the time of starting the electric motor M, the electric motor M has a torque of C1 + C2. However, when the electric motor M exceeds 70 ° C, the thermostat T2 operates, so that the electric motor M operates with a torque lower than that at the time of starting by obtaining the torque of C1 only. .

When the electric motor M exceeds 130 ° C. during abnormal operation of the electric motor M, the overload protection device T1 operates to stop the operation of the power supply motor M itself.

[0023]

[Effect of device]

 As described above, the present invention changes the overall capacity of the condenser according to the temperature rise of the electric motor used for the massage machine with a simple circuit configuration, thereby obtaining a large torque at the time of starting and Can operate the electric motor with a small torque.

Therefore, the present invention is convenient for controlling the torque of the electric motor of the massage machine, which requires a large torque at the time of startup especially in a low temperature environment because the mechanism is complicated, and the electric motor is small during operation. Since the torque is used, the temperature of the electric motor can be prevented from being overheated without unnecessary temperature rise, and the cooling device for the electric motor can be simplified.

[Brief description of drawings]

FIG. 1 is a view showing a rear surface of a chair-type massage machine using an electric motor with a torque control function according to the present invention.

FIG. 2 is a circuit diagram of an electric motor with a torque control function according to the present invention.

[Explanation of sign]

1 ... Massager, M ... Electric motor, C1 ... 1st condenser, C2 ... 2nd condenser, T1 ... Overload protection device, T2 ... Thermostat.

Claims (1)

[Scope of utility model registration request] 1. In a power supply circuit of a condenser induction type electric motor M of a massage machine 1, a second condenser C2 is connected in parallel with a first condenser C1 and the temperature of the electric motor M is detected by the second condenser C2. An electric motor with a torque control function in a massage machine, in which thermostats T2 are connected in series.