JPH0423520Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to the control of a fully automatic washing machine.

<Prior art> In a fully automatic washing machine, when moving from the washing or rinsing process to the spin-drying process, the switching of the clutch and the opening and closing of the brake lever and drain valve are performed by suction from a solenoid. and the solenoid were operating almost simultaneously.

Therefore, when moving from the washing or rinsing process to the draining and dewatering process, the solenoid is sucked at the same time as the motor is stopped, but immediately after the motor is stopped, the laundry is rotating due to inertia.

Generally, during a washing or rinsing process, forward rotation and reverse rotation are repeated, and it is unclear whether the motor is rotating forward or reverse when the motor is stopped.

When the washing and dewatering tank is receiving inertia force in a certain direction, the brake band receives a force in the direction of releasing the brake so as to move away from the brake lever, so that the brake can be easily released by the suction force of the solenoid.

However, if the washing and dehydrating tub is receiving inertia force in the opposite direction, the brake band will receive a force in the direction of tightening, and the brake band will be pressed against the brake lever, and it will take the suction force of the solenoid to separate the brake lever. However, it becomes a load and requires a large suction force.

<Purpose> In view of the above, the present invention aims to provide a washing machine that can reduce the operating force of the solenoid brake lever and can be operated with a solenoid with smaller suction force.

<Embodiment> Hereinafter, an embodiment of the present invention will be described based on FIGS. A washing/drying tank 5 is provided inside and connected to the drive shaft 3 via a clutch 6, a driven shaft 8 is connected to the drive shaft 3 via the clutch 6 and a reduction gear 7, and a driven shaft 8 is fixed to the driven shaft 8 and connected to the drive shaft 3 via a clutch 6. A rotary blade 9 that rotates in the washing and dehydrating tank 5, a drain valve 10 disposed in the washing liquid drainage path of the water tank 2, a brake lever 11 that stops the rotation of the washing and dehydrating tank 5 during washing, and the drive shaft. 3
and a solenoid 13 for opening and closing the brake lever 11 and the drain valve 10.
A control circuit 14 is provided to drive and control the drive motor 12, and the control circuit 14 turns on the solenoid 13 after a certain period of time has elapsed since the drive motor 12 was turned off when moving from the washing and rinsing stages to the draining stage. It has the function of outputting a signal for performing an operation.

The drive motor 12 is fixed to the bottom surface of the water tank 2, and a pulley 16 is fixed to a motor shaft 12a of the drive motor 12, and the pulley 16 and the drive shaft 3
A drive belt 18 is wound around the output pulley 17 fixed to the lower end of the drive belt 18 .

The drive shaft 3 has a double shaft structure consisting of an inner shaft 3a and an outer shaft 3b, an output pulley 17 is fixed to the inner shaft 3a, and the driven shaft 8 is connected to the upper end via a gear train of a reduction gear 7. are connected. Outer shaft 3
b is fixed to a housing 7a of the reduction gear 7, and the housing 7a is fixed to a bearing sleeve 8a of the driven shaft 8. The inner shaft 3a and the outer shaft 3b are detachably connected to each other via a clutch gear 19 at the lower end of the outer shaft. In addition, the outer shaft 3b and the bearing sleeve 8
a is rotatably supported by a case 20 fixed to the lower end of the water tank 2.

A brake band 21 is attached to the outer periphery of the housing 7a of the speed reduction device 7, and the F-shaped brake lever 11, which can come into contact with and separate from the brake band 21, has its center connected to the bottom surface of the water tank 2 via a shaft 22. It is supported so that it can swing freely. The brake band 2 is attached to the tip of the brake lever 11.
An engagement hole 2 that removably engages the protruding claw 21a of 1.
3 is formed, and the brake lever 11 is biased in the brake band pressure contact direction by a spring 24 coiled around the shaft 22. Note that one end 23a of the spring 24 is pressed against the brake lever 11, and the other end 24b is fixed to the case 20.

Furthermore, a clutch lever 6A that engages with the clutch gear 19 is fixed to the brake lever 11, and can swing integrally with the brake lever 11. The clutch 6 is constituted by the clutch lever 6A and the clutch gear 19.

The solenoid 13 is fixed to the bottom surface of the water tank 2, and the valve element of the drain valve 10 is connected to the tip of its iron core 13a. Further, the other end 11A of the brake lever 11 is swingably connected to the center of the iron core 13a. The drain valve 10 is arranged in a drain channel 26 formed on the bottom surface of the water tank 2.

The control circuit 14 is a general one-chip microcomputer, and has internal data RAM, blob ROM, ALU, etc., and is driven by a reference clock oscillation circuit 27, and has the output terminal connected to the solenoid 13 and A drive motor 12 is connected. In the figure, 28 is a setting device for setting various times and the like.

In the above configuration, clutch gear 1 is
9 and the clutch lever 6A are engaged, and the brake lever 11 is pressed against the brake band 21 by the spring 24, so the housing etc. of the reduction gear 7 are in a fixed state, and the driving force transmitted to the pulley 17 is , is transmitted to the inner shaft 3a of the drive shaft 3, and drives the rotor blade 9.

During dehydration, solenoid 13 turns on and iron core 1
3a, the clutch/brake lever 11 swings around the shaft 22, the clutch gear 19 is disengaged, and the brake band 21 of the housing 7a of the reduction gear 7 is also released, so that the drive transmitted to the center pulley 17 is released. The force is the outer shaft 3b of the drive shaft 3
The dehydration tank 5 is connected to the outer shaft 3b.
Rotate to dehydrate.

During washing, the rotary blades 9 agitate the laundry in the washing/dehydrating tub 5, but the washing/dehydrating tub 5 also receives a force in the direction of rotation of the rotary blades 9 due to the resistance of the laundry. Therefore, the brake band 21 of the housing 7a connected to the dehydration tank 55 is also subjected to force in the rotational direction of the rotor blade 9.

Therefore, the control circuit 14 outputs a signal to turn on the solenoid 13 when the laundry stops rotating due to inertia after the motor 12 is stopped. That way, the suction force of the solenoid can be small.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

<Effects> As is clear from the above explanation, the present invention enables the brake lever to close to the brake band by turning on the solenoid after a certain period of time has elapsed since the drive motor was turned off when moving from the washing and rinsing process to the draining process. The brake is released when the brake is released.

Therefore, even if the washing and dehydrating tub is subjected to a force in the direction of tightening the brake band due to the inertia of the laundry at the end of the washing and rinsing processes, the solenoid suction should be performed after a certain period of time has elapsed since the drive motor stopped. As a result, when the laundry stops and the inertia force disappears, the solenoid draws suction to the heart, and the solenoid's suction force is small enough to operate the brake lever, allowing the use of a small solenoid.

Moreover, when the drive motor is stopped, there is a risk that vibrations will be applied to the washing and dehydrating tub due to the rotation of the laundry due to inertia, and if the solenoid is operated in such a state, it may not function properly. Since the solenoid is activated after the vibrations of the washing and dehydrating tub have subsided, there is no risk of the solenoid malfunctioning and accurate stroke control can be performed.

[Brief explanation of the drawing]

FIG. 1 is a control circuit diagram of a washing machine showing an embodiment of the present invention, FIG. 2 is a plan view of a brake lever section, and FIG. 3 is a sectional view of the washing machine. 1...Outer tank, 2...Water tank, 3...Drive shaft, 5...
...Washing and dehydration tank, 6...Clutch, 7...Reduction device, 8...Driver shaft, 9...Rotary blade, 10...Drain valve, 11...Brake lever, 12...Drive motor, 13...Solenoid , 14...control circuit.

Claims (1)

[Scope of utility model registration request] A water tank built into the outer tank, a washing/drying tank connected to a drive shaft built into the water tank via a clutch, a driven shaft connected to the drive shaft via a clutch, and fixed to the driven shaft. a rotary blade that rotates in the washing and dehydrating tank; a drain valve disposed in the washing liquid drainage channel of the water tank; a brake band attached to the outer periphery of a housing connected to the washing and dehydrating tank; a brake lever that comes into contact with the brake band and stops rotation of the washing and dehydrating tub by a biasing force of the brake lever; a drive motor that rotationally drives the drive shaft; and a solenoid that opens and closes the brake lever and the drain valve. A control circuit is provided for driving and controlling the solenoid and the drive motor. 1. A washing machine characterized by having means for outputting a signal for turning on a solenoid after a certain period of time has elapsed from turning off a drive motor when moving from a stroke to a draining stroke.