JPH11207083A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a clutch from being switched from a dehydrating side to a washing side by a power failure or the like at the time of dehydration. SOLUTION: On the lower surface of a water receiving tank 12, a clutch lever 40 is mounted. The clutch lever 40 is energized in the direction of an arrow B by a spring member, and when the clutch lever 40 is turned in the direction of an opposite arrow B linked with the ON of a lever motor 42, the clutch is switched from the washing side to the dehydrating side. In the case of the constitution, a cam plate 47 is moved linked with the turning of the clutch lever 40 and a pin 50 is moved inside a cam groove 47a forming a heart shape. Thus, even when the power failure occurs in the ON state of the lever motor 42 and the lever motor 42 is turned OFF, since the turning of the clutch lever 40 in the direction of the arrow B is limited, the clutch is prevented from being switched from the dehydrating side to the washing side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine having a clutch for connecting and disconnecting between a washing motor and a washing tub.

[0002]

FIG. 14 shows a conventional construction of the above washing machine. Here, the tub shaft 1 is connected to a washing tub, and a stirring shaft 2 is housed inside the tub shaft 1. A stirring body is connected to an upper end of the stirring shaft 2, and a lower end of the stirring shaft 2 is connected to a rotor 3 of the washing motor.

[0003] A clutch 4 is rotatably connected to the tank shaft 1 about a shaft 4c. During dehydration, the clutch 4 rotates in a direction opposite to the arrow A as shown by a two-dot chain line. Are engaged with the rotor 3. For this reason, the rotational force of the rotor 3 is transmitted to the tub shaft 1 through the clutch 4, and the washing tub and the stirring body rotate synchronously at a high speed.

[0004] In the above configuration, when the dehydration operation is completed,
After the rotation of the rotor 3 is stopped, the clutch lever 5 enters the rotation locus of the clutch 4 in conjunction with the turning off of the lever motor, and the clutch 4 rotates once at a low speed together with the rotor 3.
Then, the clutch 4 collides with the clutch lever 5 and rotates in the direction of arrow A, so that the dewatering projection 4a of the clutch 4 is separated from the rotor 3, and the washing projection 4b is inserted into the hole-shaped clutch engaging portion 6. Engage. For this reason, the rotation of the tank shaft 1 is restricted, and the agitator rotates alone with the rotation of the rotor 3 (rinsing operation).

Accordingly, when a power failure or the like occurs during dehydration and the washing motor is turned off, the clutch 4 coasts integrally with the rotor 3 at a high speed. At the same time, the lever motor is turned off, and the clutch lever 5 enters the rotation trajectory of the clutch 4, so that the clutch 4 that coasts at high speed collides with the clutch lever 5, and the clutch 4 collides with the clutch lever 5. There is a possibility that the battery pack will be deformed by the impact of the above or the impact when engaging in the clutch engagement portion 6.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a washing machine capable of preventing a clutch from being deformed by an impact at the time of a power failure or the like.

[0007]

According to a first aspect of the present invention, there is provided a washing machine comprising: a washing tub into which laundry is put; an agitator which is housed in the washing tub and rotates with the operation of a washing motor; A clutch movable between a dehydrating side for connecting the tub and the washing motor and a washing side for shutting off between the washing tub and the washing motor; A moving mechanism for moving the
A holding mechanism for switching the clutch to a dehydrating side, and a holding mechanism for switching the clutch to an allowable state for allowing the clutch to move from the dehydrating side to the washing side; It is characterized in that the driving source is switched to the holding state when the driving source is turned off.

According to the above means, when a power failure or the like occurs during dehydration, the drive source is turned off, and the clutch attempts to switch from the dehydration side to the washing side. However, since the holding mechanism is switched to the holding state in conjunction with the turning off of the drive source and holds the clutch on the dehydrating side, it is possible to prevent the clutch from being deformed by an impact at the time of a power failure.

According to a second aspect of the present invention, there is provided a washing machine having a cam plate having a substantially heart-shaped cam groove and moving in conjunction with a clutch, wherein the cam plate is movably engaged in the cam groove and is at a moving position in the cam groove. The feature is that the holding mechanism is provided with a pin for holding the clutch on the dehydrating side by restricting the movement of the cam plate accordingly. According to the above means, it is possible to cope with the problem by simply adding a cam plate, a pin, and the like to an existing washing machine, which is advantageous in applying a control mechanism to an actual product.

According to a third aspect of the present invention, in the washing machine, a washing tub into which laundry is put, a stirrer housed in the washing tub and rotating with the operation of the washing motor, and a washing tub between the washing tub and the washing motor. A clutch that can be moved to a dehydrating side that connects the washing tub and the washing motor that cuts off between the washing tub and the washing motor; and a moving mechanism that moves the clutch to the dehydrating side and the washing side in conjunction with ON / OFF of a drive source. A holding mechanism for switching the clutch to a dehydrating side and a holding mechanism for switching the clutch to an allowable state for allowing the clutch to move from the dehydrating side to the washing side, wherein the holding mechanism moves the clutch to the dehydrating side. This is characterized in that the state is switched to the holding state based on turning off another drive source.

According to the above means, when a power failure or the like occurs during dehydration, the drive source is turned off, and the clutch attempts to switch from the dehydration side to the washing side. However, since the holding mechanism is switched to the holding state in conjunction with the turning off of the drive source and holds the clutch on the dehydrating side, it is possible to prevent the clutch from being deformed by an impact at the time of a power failure.

The washing machine according to the fourth aspect is characterized in that the holding mechanism includes a stopper that restrains the movement of the clutch in conjunction with the turning off of the drive source. According to the above means, the holding mechanism can be switched to the holding state with a simple configuration in which the stopper is moved in conjunction with the turning off of the drive source.

According to a fifth aspect of the present invention, the driving source of the moving mechanism is a geared motor having a built-in holding mechanism, and the stopper of the holding mechanism locks the gear of the geared motor to restrict the operation of the moving mechanism. Accordingly, the clutch is held on the dehydrating side. According to the above means,
Since the holding mechanism is built in the geared motor, the space occupied by the holding mechanism is reduced, which is advantageous in terms of compact design.

According to a sixth aspect of the present invention, the washing machine is characterized in that the holding mechanism switches from the holding state to the allowable state when the driving source is turned on again. According to the above means, the holding of the clutch by the holding mechanism is released only by turning on the drive source again, so that the control of the holding mechanism is simplified.

According to a seventh aspect of the present invention, there is provided a washing machine in which a washing tub into which laundry is put, a stirrer housed inside the washing tub and rotated by the operation of the washing motor, and a washing tub between the washing tub and the washing motor. A clutch that can be moved to a dehydrating side that connects the washing tub and the washing motor that cuts off between the washing tub and the washing motor; and a moving mechanism that moves the clutch to the dehydrating side and the washing side in conjunction with ON / OFF of a drive source. And a backup power supply for supplying power to the drive source when the drive source is cut off. According to the above means, when a power failure or the like occurs during dehydration, power is supplied to the drive source from the backup power supply. For this reason, the clutch is held on the dehydrating side in conjunction with the turning on of the drive source, so that the clutch is prevented from being deformed by the impact at the time of the power failure.

[0016]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. First, in FIG.
A water receiving tank 12 is provided in the outer box 11. As shown in FIG. 3, a metal upper cup 13 is screwed to the bottom of the water receiving tank 12.
The outer ring No. 4 is fixed.

A metal lower cup 15 is welded to the upper cup 13. An outer ring of a bearing 16 is fixed to the lower cup 15, and a cylindrical tank shaft 17 is press-fitted into the inner ring of the bearing 14 and the inner ring of the bearing 16. This tank axis 1
A rotary tub 18 is screwed to the upper end of 7, and the rotary tub 18 is housed in the water receiving tub 12 as shown in FIG. 6. The rotating tub 18 corresponds to a washing tub.

A top cover 11a is provided on the upper end of the outer box 11.
Is installed. This top cover 11a has an outer lid 1
9 is attached, and the upper opening of the outer box 11 is
It is opened and closed with the operation of. An inner lid (not shown) is attached to the upper end of the water receiving tank 12, and a water inlet (not shown) is provided in the inner lid. This inner lid is a water receiving tank 1
2 for opening and closing the upper opening of the rotating tank 1
In 8, laundry is thrown in with the outer lid 19 and the inner lid open.

A drainage channel 20 is formed at the bottom of the water receiving tank 12, and an inlet of the drainage channel 20 communicates with the rotary tank 18.
A drain valve 21 is mounted at the outlet of the drain channel 20. As shown in FIG. 6, a drain hose 22 is
Is connected, and the other end of the drain hose 22 communicates with the outside of the machine. Further, a water injection valve 23 is provided at a rear portion in the top cover 11a. When the water injection valve 23 is opened with the drain valve 21 closed, the water drain valve 20 and the drain passage 20 are formed through the water inlet of the inner lid from the water injection valve 23. Tap water is injected and stored in the rotary tank 18.

A stator 24 is fixed to the lower cup 15, as shown in FIG. The stator 24 is a 36-pole stator core 2 screwed to the lower cup 15.
4a and 2 that are axially covered on the stator core 24a.
The main components are the insulating cover 24b and the 36 coils 24c, and each coil 24c is wound around the teeth of the stator core 24a from above both insulating covers 24b.

The rotor 25 includes a housing 25a made of an iron plate having a disk shape, 24 rotor magnets 25b mounted on the inner peripheral surface of the housing 25a, and a housing 25a.
a bracket 25 made of synthetic resin formed at the center of
and a boss 25d made of a metal pipe is insert-molded on the bracket portion 25c.
Reference numeral 26 denotes a washing motor (outer rotor type three-phase DC brushless motor) including the stator 24 and the rotor 25.

A stirring shaft 27 is housed in the tank shaft 17, and a stirring body 28 is screwed to the upper end of the stirring shaft 27 in the rotary tank 18 as shown in FIG. I have.
As shown in FIG. 3, a boss 25d of the rotor 25 is inserted into the lower end of the stirring shaft 27. A screw 29 is fastened to the lower end of the stirring shaft 27, and the rotor 25 is fixed to the stirring shaft 27 by fastening a boss 25 d between the screw 29 and the stirring shaft 27. .

FIG. 6 shows a front end of the top cover 11a.
2, a circuit board 30 is provided. As shown in FIG. 7, a plurality of operation keys 3 are provided on the circuit board 30.
1, a display 32, a control device 33 mainly composed of a microcomputer, and a drive circuit 34 composed of an inverter circuit are mounted. The control device 33 drives each switching element of the drive circuit 34 by performing PWM control. Circuit 3
Power is supplied to the coil 24c of each phase from 4 to rotate the stirring shaft 27 and the stirring body 28 integrally with the rotor 25 at the target speed.

As shown in FIG. 3, a clutch holder 35 is fixed to the outer peripheral surface of the tank shaft 17, and a clutch 36 made of casting is connected to the clutch holder 35 so as to be rotatable about a shaft 36a. Have been. A toggle spring 37 is interposed between the clutch 36 and the clutch holder 35. When the left end of the toggle spring 37 is located on the side of the action line α in the direction of the arrow A, the toggle spring 37 engages the clutch 36. When the left end of the toggle spring 37 is on the opposite side of the action line α in the direction of arrow A, the toggle spring 37 biases the clutch 36 in the direction of arrow A. Incidentally, the toggle spring 37 is formed of a compression coil spring.

The housing 25a of the rotor 25 is provided with a plurality of projecting plate portions 25e extending radially. Each of the projecting plate portions 25e is made of a synthetic resin, and is formed integrally with the bracket portion 25c. Also, clutch 3
A dewatering protrusion 36b is formed on the lower surface of 6, and when the clutch 36 rotates in the direction opposite to the arrow A, the dewatering protrusion 36b engages between the protruding plate portions 25e of the rotor 25.

When the rotor 25 rotates in this state, the rotational force of the rotor 25 is transmitted from the dewatering projection 36b to the tank shaft 17 through the clutch 36 and the clutch holder 35, and is integrated with the clutch 36, the clutch holder 35 and the tank shaft 17. Then, the rotary tank 18 rotates. At the same time, the rotational force of the rotor 25 is transmitted to the stirring body 28 through the stirring shaft 27, and the stirring body 28 and the rotating tank 18 rotate synchronously (so-called direct drive).

A screw 38 is fixed to the upper cup 13 and the lower cup 15, and a coil portion of a torsion coil spring 39 is inserted around the outer periphery of the screw 38 as shown in FIG. A clutch lever 40 is rotatably mounted on the screw 38. The clutch lever 40 is formed by extending a tension coil spring 40C between lever plates 40A and 40B made of metal.
One arm portion 9 is assigned to the clutch lever 40. The other arm of the torsion coil spring 39 is applied to the lower cup 15, and the torsion coil spring 3
9 urges the clutch lever 40 in the direction of arrow B.

A case 41 and a lever motor 42 are attached to the lower surface of the water receiving tank 12.
As shown in FIG. 5, the rotary shaft 42a projects into the case 41, and a small gear 43 is connected to the rotary shaft 42a. A large gear 44 is provided in the case 41 so as to be rotatable about a shaft 44a. The large gear 44 is meshed with the small gear 43, and the large gear 44 is provided with a wire winding portion 44b. Reference numeral 63 denotes a geared motor (drive source) including the case 41, the lever motor 42, the small gear 43, and the large gear 44.

A wire 45 is wound around the wire winding portion 44b. As shown in FIG. 1, a connecting member 46 is connected to the distal end of the wire 45,
When the large gear 44 rotates in the direction of arrow C in FIG. 5 with the on of 2, the wire 45 is wound around the wire winding portion 44b, and the connecting tool 46 moves in the direction of arrow D.

As shown in FIG.
6a are formed. One end of the clutch lever 40 is inserted into the hole 46a.
When the connecting member 46 moves in the direction of arrow D with the turning on, the one end of the clutch lever 40 rotates in the direction opposite to arrow B against the spring force of the torsion coil spring 39. When the lever motor 42 is turned off, one end of the clutch lever 40 rotates in the direction of arrow B due to the spring force of the torsion coil spring 39, and the connecting member 46 moves in the direction opposite to arrow D.

As shown in FIG. 3, the clutch lever 40 is provided with a first pressing portion 40a. Further, a first inclined surface portion (not shown) is formed on the clutch 36, and the lever motor 42 is turned off in a state where the dewatering protrusion 36b of the clutch 36 is engaged between the protrusions 25e of the rotor 25. Then, the clutch lever 40 rotates in the direction of arrow B in FIG. 4, and the guide portion 40a of the clutch lever 40 enters the rotation locus of the inclined surface portion of the clutch 36. Then, the inclined surface portion of the clutch 36 collides with the guide portion 40a, the inclined surface portion is pressed along the guide portion 40a, and the clutch 36 rotates in the direction of the arrow A in FIG. The engagement of the rotor 25 with the protruding plate 25e is released.

As shown in FIG. 3, the clutch 36 has a washing protrusion 36c, and the lower cup 15 has a clutch engaging portion 15a. This clutch engagement portion 15
When the clutch 36 rotates in the direction of the arrow A, the washing protrusion 36c of the clutch 36 engages with the clutch engaging portion 15a. Then, the rotation of the tank shaft 17 is restricted via the clutch 36, the clutch holder 35, and the lower cup 15, so that the rotational force of the rotor 25 is
7 and transmitted only to the stirring body 28, and the stirring body 28 rotates alone.

The clutch lever 40 has a second pressing portion 40
b is provided. Further, a second inclined surface portion (not shown) is formed on the clutch 36, and the washing protrusion 36 c of the clutch 36 is connected to the clutch engagement portion 15 a of the lower cup 15.
When the lever motor 42 is turned on in a state in which the clutch lever 40 is engaged, the clutch lever 40 rotates in a direction opposite to the arrow B in FIG. Then, the guide portion 40b of the clutch lever 40 presses the second inclined surface portion of the clutch 36, and the clutch 36 rotates in the direction indicated by the arrow A in FIG. 3, so that the washing protrusion 36c of the clutch 36 and the clutch engagement portion 15a is released, and the dewatering protrusion 36b of the clutch 36 is moved to the protrusion 25 of the rotor 25.
Engage between e.

As shown in FIG. 1, the connecting member 46 is provided with a cam plate 47, and one end of a rod 48 is connected to the cam plate 47. This rod 48
Is connected to the plunger of the drain valve 21,
When the lever motor 42 is turned on, the connecting tool 46 moves in the direction of the arrow D.
When it moves in the direction, the plunger is pulled in the direction of arrow D, and the drain valve 21 is opened. The lever motor 42
When the connecting tool 46 moves in the direction opposite to the arrow D in conjunction with turning off the plunger, the plunger is returned, and the drain valve 21 is closed.

As shown in FIG. 2, a bracket 49 is screwed below the water receiving tank 12, and a cam plate 47 is movably inserted into the bracket 49. A guide groove 49a extending in the direction of arrow E is formed in the bracket 49, and a pin 50 is slidably inserted into the guide groove 49a. A heart-shaped cam groove 47a is formed in the cam plate 47, and the pin 50 is inserted into the cam groove 47a.

Next, the operation of the above configuration will be described. When the control device 33 detects that the automatic operation is selected in accordance with the operation of the operation key 31, the control device 33 opens the water injection valve 23 and injects tap water into the rotary tank 18. In this state, when the lever motor 42 is turned off, the cam plate 47 moves in the direction opposite to the arrow D in FIG. 1, and the drain valve 21 is closed. Therefore, the water injected into the rotary tank 18 is stored in the drainage channel 20 and the rotary tank 18. FIG. 8 shows the operating state of the washing machine,
This is for associating the energized state of the lever motor 42 with the moving state of the pin 50 with respect to the cam groove 47a. As shown in the drawing, at the time of the above-described water injection 1, the pin 50 is located at the point A in the cam groove 47a.

When the control device 33 detects that the water level in the rotary tank 18 has reached a predetermined level, it closes the water injection valve 23 and stops the operation of water injection into the rotary tank 18. As shown in FIG. 6, the water receiving tank 12 is provided with an air trap 20 a communicating with the drainage channel 20. The air trap 20a is compressed by the water in the rotary tank 18 and changes its internal pressure.
The water level in the rotary tub 18 is determined based on the detection of the internal pressure of “a” by the water level sensor 51 (see FIG. 7). A drive circuit 52 (see FIG. 7) is mounted on the circuit board 30, and the control device 33 opens and closes the water injection valve 23 via the drive circuit 52.

When the water supply is stopped, the control device 33 supplies power to the washing motor 26 to rotate the rotor 25. In this state, the clutch 36 rotates in the direction of arrow A in FIG. 3, and the washing protrusion 36 c of the clutch 36 is engaged with the clutch engaging portion 15 a of the lower cup 15. Therefore, the tank shaft 1
7 is restricted, and the rotational force of the rotor 25 is
The stirrer 28 rotates independently (washing in FIG. 8).

When detecting the end of the washing operation, the control device 33 applies a DC braking force to the washing motor 26 to stop the rotation of the rotor 25 (brake 1 in FIG. 8). And
Turn on the lever motor 42, and move the large gear 44
Rotate in the direction. Then, the wire 45 is wound around the wire winding portion 44b, and the connecting tool 46 and the cam plate 47
Moves in the direction of arrow D in FIG. 1, the drain valve 21 is opened, and the water in the rotary tank 18 is drained from the drain passage 20 to the drain hose 2.
2 (drain 1 in FIG. 8).

At this time, the clutch lever 40 rotates in the direction indicated by the arrow B in FIG.
The guide portion 40b above the zero presses the clutch 36.
Then, the clutch 36 rotates in the direction opposite to the arrow A,
The washing protrusion 36c of the clutch 36 is separated from the clutch engagement portion 15a of the lower cup 15, and the dehydrating protrusion 3 of the clutch 36
6b is engaged between the projecting plate portions 25e of the rotor 25. In this state, as shown in the column of drainage 1 in FIG. 8, the pin 50 has moved to the point B in the cam groove 47a.

When the water in the rotary tub 18 is drained, the control device 33 rotates the rotor 25 at a high speed with the lever motor 42 turned on. Then, since the tank shaft 17 and the stirring shaft 27 rotate at high speed integrally with the rotor 25, the drain valve 2
In the open state of 1, the stirring body 28 and the rotating tub 18 rotate at high speed (dehydration 1 in FIG. 8).

A plurality of dehydration holes (not shown) are provided at the upper end of the rotary tub 18.
After the water in 8 rises along the inner surface of the rotary tub 18 by centrifugal force, it falls into the water receiving tub 12 through a plurality of dehydration holes.
As shown in FIG. 6, a cylindrical drain port 12 a is provided at the bottom of the water receiving tank 12, and water spilled into the water receiving tank 12 is discharged from the drain port 12 a through the drain hose 22 to the outside of the machine. Is discharged to The drive circuit 5 is provided on the circuit board 30.
3 (see FIG. 7), and the control device 33 controls the drive of the lever motor 42 via the drive circuit 53.

When detecting the end of the spin-drying operation, the control device 33 applies a DC braking force to the washing motor 26 to stop the rotation of the rotary tub 18 and the stirring body 28 (brake 2 in FIG. 8). Then, the lever motor 42 is turned off, and the spring force of the torsion coil spring 39 acts on the clutch lever 40. Then, as shown in the column of brake 2 in FIG. 8, the pin 50 moves to the point C in the guide groove 47a, so that the movement of the cam plate 47 in the direction indicated by the arrow D is restricted. Therefore, the rotation of the clutch lever 40 in the direction of arrow B is restrained, and the first guide portion 40a of the clutch lever 40 is held in a state of being retracted outside the rotation locus of the clutch 36.

The control device 33 moves the pin 50 into the guide groove 47.
When it is moved to the point C in a, the lever motor 42 is turned on. Then, as the large gear 44 rotates in the direction of arrow C in FIG. 5, the wire 45 is wound up in the direction of arrow D, and the hoisting force of the lever motor 42 acts on the clutch lever 40. Therefore, as shown in the column of brake 2 in FIG.
Since the pin 50 moves to the two points in the cam groove 47a, the first guide portion 40a of the clutch lever 40
Is kept in a state of being retracted out of the rotation locus of.

When the control device 33 moves the pin 50 to the two points, the control device 33 turns off the lever motor 42 and the clutch lever 4
0 is rotated in the direction of arrow B in FIG. 1 by the spring force of the torsion coil spring 39. Then, the cam plate 47 moves in the direction indicated by the arrow D, and the pin 50 returns to the point A in the cam groove 47a as shown in the column of water injection 2 in FIG. 8, so that the drain valve 21 is closed. At the same time, the first guide portion 40a of the clutch lever 40 enters the rotation locus of the clutch 36.

When the first guide portion 40a of the clutch lever 40 enters the rotation locus of the clutch 36, the control device 33 rotates the rotor 25 once at a low speed. Then, the clutch 36 is moved at a low speed to the first position of the clutch lever 40.
3 and rotates in the direction of arrow A in FIG. 3, so that the dewatering projection 36 b of the clutch 36 separates from the projection 25 e of the rotor 25, and the washing projection 36 of the clutch 36.
c engages with the clutch engaging portion 15a of the lower cup 15.

When the clutch 33 is engaged with the lower cup 15, the control device 33 opens the water injection valve 23 and
And store tap water in the rotary tank 18 (see FIG.
). Thereafter, when it is detected that the water level in the rotary tank 18 has reached a predetermined level, the water injection valve 23 is closed, and the rotary tank 18 is closed.
Stop the water injection operation for. And the washing motor 26
, And the rotor 25 is rotated. Then, the rotational force of the rotor 25 is transmitted to the stirring body 28, and the stirring body 28 rotates alone (rinse in FIG. 8).

When detecting the end of the rinsing operation, the control device 33 applies a DC braking force to the washing motor 26 to stop the rotation of the rotor 25 (brake 3 in FIG. 8). Then, the lever motor 42 is turned on, and the connecting tool 46 and the cam plate 47 are moved in the direction of arrow D in FIG. Then, as shown in the column of drain 2 in FIG. 8, the pin 50 moves to the point B in the cam groove 47a, the drain valve 21 is opened, and the water in the rotary tank 18 is discharged through the drain hose 22. At this time, the clutch lever 40 rotates in the direction indicated by the arrow B in FIG. 1, and the guide portion 40b above the clutch lever 40 presses the clutch 36 in FIG.
6 rotates in the direction of the arrow A, and the dewatering protrusion 36b is
5 between the projecting plate portions 25e.

When the water in the rotary tub 18 is discharged, the control device 33 drives the rotor 25 at a high speed, and synchronously rotates the stirring body 28 and the rotary tub 18 at a high speed while the drain valve 21 is open (FIG. 8 dehydration 2). When the end of the spin-drying operation is detected, a DC braking force is applied to the washing motor 26,
The rotation of the rotary tank 18 and the stirring body 28 is stopped (initial return / brake 4 in FIG. 8).

When the rotation of the rotary tank 18 and the stirring body 28 is stopped, the control device 33 turns off the lever motor 42 and causes the pin 50 to move the pin 50 into the cam groove 4 as shown in the column of initial reset in FIG.
The operation of moving the pin 50 to the point C in the cam groove 47a and the operation of turning on the lever motor 42 to move the pin 50 to the two points in the cam groove 47a are performed. Then, the lever motor 42 is turned off and the pin 5
0 to the point A in the cam groove 47a, and the first guide portion 40a of the clutch lever 40 is
6 into the rotation locus.

When the first guide portion 40a of the clutch lever 40 enters the rotation locus of the clutch 36, the control device 33 rotates the rotor 25 once at a low speed. Then, the clutch 36 collides with the guide portion 40a of the clutch lever 40 at a low speed, and rotates in the direction of arrow A in FIG. 3, so that the washing protrusion 36c of the clutch 36 engages with the clutch engagement portion 15a of the lower cup 15. In this case, the clutch 36 returns to the initial state. Reference numeral 54 in FIG. 7 indicates a drive circuit mounted on the circuit board 30. The control device 33 controls the display 32 via the drive circuit 54, so that the display 32 Display driving information.

Reference numeral 55 in FIG. 1 indicates a moving mechanism including the clutch lever 40, the geared motor 63, the wire 45, and the connecting member 46. As apparent from the above description, the moving mechanism 55 The clutch 36 is moved to the dehydrating side engaged with the rotor 25 and the washing side engaged with the lower cup 15 in conjunction with turning on / off of the lever motor 42.
Reference numeral 56 in FIG. 1 indicates a holding mechanism including the cam plate 47, the bracket 49, and the pin 50.
As is clear from the above description, the holding mechanism 56 holds the clutch 36 on the dehydrating side (the state where the pin 50 is located at the point C in the cam groove 47a), and shifts from the dehydrating side of the clutch 36 to the washing side. State (pin 50)
Is located at the two points in the cam groove 47a).

According to the above-described embodiment, when a power failure or the like occurs at the time of dehydration 1 and dehydration 2 in FIG. 8 and the washing motor 26 is turned off, the rotating tub 18 and the stirring body 28 are integrated with the rotor 25 at high speed. To coast. At the same time, the lever motor 42 is turned off, and the spring force of the torsion coil spring 39 acts on the clutch lever 40. Then, brake 2 in FIG.
And the brake 4 column, the pin 50 moves to the point C in the cam groove 47a.
The rotation of the clutch lever 40 is restricted.
0a is kept in a state of being retracted outside the rotation locus of the clutch 36. For this reason, the clutch 36 is
Of the lower cup 15
The clutch 36 is not engaged with the clutch engaging portion 15a at a high speed, so that the deformation of the clutch 36 is prevented.

The state of the holding mechanism 56 is changed by the moving mechanism 55.
By the geared motor 63 of FIG. This eliminates the need for a dedicated drive source for switching the state of the holding mechanism 56, thereby simplifying the configuration. In addition, the pin 50 is engaged with the cam groove 47a of the cam plate 47, and the clutch 36 is held on the dehydrating side by constraining the cam plate 47 according to the moving position of the pin 50 within the cam groove 47a. For this reason, the cam plate 47 and the pin 50 are installed in the existing washing machine.
It can be dealt with simply by adding additional components and the like, which is advantageous when the holding mechanism 56 is applied to an actual product.

When the lever motor 42 is turned off, the pin 50 is moved to the point C in the cam groove 47a, and the holding mechanism 56 is moved.
Is switched to the holding state, the pin 50 is moved to two points in the cam groove 47a with the turning on of the lever motor 42, and the holding mechanism 56 is switched to the allowable state. Therefore, the state of the holding mechanism 56 is switched only by turning on and off the lever motor 42, so that the control of the holding mechanism 56 (the lever motor 42) is simplified.

Next, a second embodiment of the present invention will be described with reference to FIGS.
Description will be made based on 0. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
Only different members will be described. First, in FIG. 9, a stopper 57 is mounted on the lower surface of the water receiving tank 12 so as to be rotatable around a shaft 57a, and a coil portion of a torsion coil spring 58 is inserted around the outer periphery of the shaft 57a. . One arm of the torsion coil spring 58 is applied to the water receiving tank 12, and the other arm is applied to the stopper 57. The torsion coil spring 58 urges the stopper 57 in the direction of arrow F. ing.

An electromagnetic solenoid 59 corresponding to a drive source is mounted on the lower surface of the water receiving tank 12. The plunger 59a of the electromagnetic solenoid 59 is rotatably connected to the stopper 57, and when the electromagnetic solenoid 59 is turned on,
The plunger 59a retracts in the direction of arrow G, and the stopper 57
Rotates in the direction opposite to the arrow F against the spring force of the torsion coil spring 58.

Next, the operation of the above configuration will be described. When starting the operation, the control device 33 opens the water injection valve 23 and injects tap water into the rotary tank 18 (water injection 1 in FIG. 10).
). In this state, when the lever motor 42 is turned off, the clutch lever 40 rotates in the direction of arrow B, the drain valve 21 is closed, and the clutch 36 is switched to the washing side engaged with the lower cup 15. At the same time, the electromagnetic solenoid 59
Is turned on, the stopper 57 rotates in the direction opposite to the arrow F against the spring force of the torsion coil spring 58, and is held in a state separated from the connecting member 46.

When the control device 33 detects that the water level in the rotary tank 18 has reached a predetermined level, it closes the water injection valve 23. Then, power is supplied to the washing motor 25, and the stirring body 2
After rotating the motor 8 alone (washing in FIG. 10), a DC braking force is applied to the washing motor 25 to stop the rotation of the washing motor 25 (brake 1 in FIG. 10).

The control device 33 turns on the lever motor 42 when the rotation of the washing motor 25 is stopped. Then, the clutch lever 40 rotates in the direction opposite to the arrow B, and the second guide portion 40b of the clutch lever 40 presses the clutch 36, so that the clutch 36 is switched to the dewatering side engaged with the rotor 25. At the same time, the connecting tool 46 moves in the direction of arrow D, so that the drain valve 21 is opened, and the water in the rotary tank 18 is discharged through the drain hose 22 (the drain 1 in FIG. 10).
).

The control device 33 turns off the electromagnetic solenoid 59 when the connecting member 46 is moved in the direction of arrow D. Then, as shown by a two-dot chain line in FIG.
Plunger 59a projects in the direction of the arrow G, and the stopper 57 rotates in the direction of the arrow F by the spring force of the torsion coil 58 and engages with the connecting member 46.
Rotation of arrow 0 in the direction of arrow B is restricted.

When the water in the rotary tub 18 is discharged, the controller 33 drives the rotor 25 at a high speed to rotate the tub shaft 17 and the stirring shaft 27 at a high speed (dehydration 1 in FIG. 10). A DC braking force is applied to the washing motor 26 to stop the rotation of the rotating tub 18 and the stirring body 28 (Brake 2 in FIG. 10). Then, the electromagnetic solenoid 59 is turned on, the stopper 57 is rotated in the direction indicated by the arrow F, and the movement of the connector 46 in the direction indicated by the arrow D is permitted.

When the control device 33 permits the movement of the connecting member 46, the control device 33 turns off the lever motor 42, moves the connecting member 46 in the direction indicated by the arrow D, and closes the drain valve 21. Then
The clutch lever 40 rotates in the direction of arrow B, and the first guide portion 40a of the clutch lever 40 enters the rotation locus of the clutch 36.

When the control unit 33 causes the guide portion 40a of the clutch lever 40 to enter the rotation locus of the clutch 36, the control device 33 rotates the rotor 25 once at a low speed. Then, the clutch 36 is driven at a low speed at the guide portion 40 of the clutch lever 40.
a, and the clutch 36 is switched to the washing side engaged with the lower cup 15.

When switching the clutch 36 to the washing side, the control device 33 opens the water injection valve 23 to inject tap water into the rotary tub 18 (water injection 2 in FIG. 10), and then drives the washing motor 26, The stirrer 28 is rotated alone (rinsing in FIG. 10). Thereafter, a DC braking force is applied to the washing motor 26 to stop the rotation of the stirring body 28 (the brake in FIG. 10).
3). Then, the lever motor 42 is turned on, and the connecting tool 46 is turned on.
Is moved in the direction of arrow D. Then, the drain valve 21 is opened, and the water in the rotary tank 18 is discharged (the drain 2 in FIG. 10).
). At this time, since the second guide portion 40b of the clutch lever 40 presses the clutch 36, the clutch 36 is switched to the dehydrating side engaged with the rotor 25.

When the control device 33 moves the connecting member 46 in the direction of arrow D, the electromagnetic solenoid 59 is turned off, the stopper 57 is engaged with the connecting member 46, and the rotation of the clutch lever 40 in the direction of arrow B is performed. to bound. In this state, the washing motor 26 is driven at a high speed, and the rotating tub 18 and the stirring body 28 are rotated at a high speed (dehydration 2 in FIG. 10).

When detecting the end of the spin-drying operation, the control device 33 applies a DC braking force to the washing motor 26 to stop the rotation of the rotary tub 18 and the stirring body 28 (brake 4.
Initial return). Then, the electromagnetic solenoid 59 is turned on, the stopper 57 is separated from the connecting tool 46, and the moving of the connecting tool 46 in the direction of the arrow D is allowed. Next, lever motor 4
2 is turned off, the connecting tool 46 is moved in the direction opposite to the arrow D, and the drain valve 21 is closed. At this time, the clutch lever 40 rotates in the direction of arrow B, and the first guide portion 40a of the clutch lever 40 enters the rotation locus of the clutch 36.

When the control device 33 causes the guide portion 40a of the clutch lever 40 to enter the rotation locus of the clutch 36, the control device 33 rotates the rotor 25 once at a low speed. Then, the clutch 36 is driven at a low speed at the guide portion 40 of the clutch lever 40.
a, the clutch 36 returns to the initial state in which the clutch 36 is engaged with the lower cup 15.

Reference numeral 60 indicates a holding mechanism including a stopper 57, a torsion coil spring 58, and an electromagnetic solenoid 59. As is clear from the above description, the holding mechanism 60 moves the clutch 36 to the dehydrating side. The state is switched to a holding state (a state in which the stopper 57 is engaged with the connecting member 46) and an allowable state (a state in which the stopper 57 is separated from the connecting member 46) in which the clutch 36 is allowed to move from the dehydrating side to the washing side.

According to the above-described embodiment, when a power failure or the like occurs at the time of dehydration 1 and dehydration 2 in FIG. 10 and the washing motor 26 is turned off, the rotary tub 18 and the stirring body 28 are integrated with the rotor 25 at high speed. To coast. At the same time, the lever motor 42 is turned off, but the stopper 57 is engaged with the connecting member 46 and the rotation of the clutch lever 40 in the direction of arrow B is restrained.
a is kept out of the rotational locus of the clutch 36. This prevents the clutch 36 from colliding with the guide portion 40a of the clutch lever 40 at a high speed or engaging with the clutch engagement portion 15a of the lower cup 15 at a high speed, thereby preventing deformation of the clutch 36. .

Further, the movement of the clutch 36 is restricted by locking the connecting member 46 with the stopper 57. For this reason, the locking force of the connecting tool 46 by the stopper 57 increases,
Since the engagement between the connector 46 and the stopper 57 is prevented from being disengaged by the external force acting on the stopper 57 and the like, the clutch 36 is securely held on the dehydrating side. With this,
The holding mechanism 60 can be switched between the holding state and the permissible state only by rotating the stopper 57 in conjunction with the turning on and off of the electromagnetic solenoid 59, so that the configuration of the holding mechanism 60 is simplified.

When the electromagnetic solenoid 59 is turned off, the stopper 57 is engaged with the connecting member 46 and the holding mechanism 60 is switched to the holding state. Then, when the electromagnetic solenoid 59 is turned on, the stopper 57 and the connecting member 46 are engaged. Then, the holding mechanism 60 was switched to the allowable state. Therefore, the state of the moving mechanism 60 is switched only by turning on and off the electromagnetic solenoid 59, so that the control of the moving mechanism 60 (the electromagnetic solenoid 59) is simplified.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same members as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. First, FIG.
The holding mechanism 60 is housed in the case 41 of the geared motor 63. When the electromagnetic solenoid 59 is turned on, the plunger 59a retracts in the direction of arrow H, and the stopper 57 resists the spring force of the torsion coil spring 58. In the direction of arrow I.

The large gear 44 is provided with an intermediate gear portion 44c. When the electromagnetic solenoid 59 is turned on, the stopper 57 rotates in the direction of arrow I to separate from the intermediate gear portion 44c, and the large gear 44 rotates. Movement is allowed. When the electromagnetic solenoid 59 is turned off, the stopper 57 rotates in the direction opposite to the arrow I by the spring force of the torsion coil spring 58 and meshes with the intermediate gear portion 44c. Is bound through.

According to the above embodiment, at the time of dehydration 1 and dehydration 2 in FIG. 12, the stopper 57 meshes with the intermediate gear portion 44 c of the large gear 44 as the electromagnetic solenoid 59 is turned off.
The rotation of the clutch lever 40 is restricted. For this reason, even if a power failure occurs during dehydration 1 and dehydration 2, the guide portion 40a of the clutch lever 40 is kept in a state of being retracted out of the rotation locus of the clutch 36. At a high speed or engaging with the clutch engaging portion 15a of the lower cup 15 at a high speed, and the deformation of the clutch 36 is prevented.

Further, the holding mechanism 60 is connected to the geared motor 63.
Built-in. Therefore, the space occupied by the holding mechanism 60 is reduced, which is advantageous in terms of a compact design.

In the third embodiment, the stopper 57 is meshed with the intermediate gear 44c of the large gear 44.
However, the present invention is not limited to this. In the case of this configuration, the configuration of the large gear 44 is simplified because the intermediate gear portion 44c can be eliminated.

In the second and third embodiments, the electromagnetic solenoid 59 is used as a drive source for rotating the stopper 57. However, the present invention is not limited to this.
For example, a motor may be used.

In the second and third embodiments, the electromagnetic solenoid 59 is turned on and off in accordance with the operating state. However, the present invention is not limited to this. For example, the electromagnetic solenoid 59 is always on regardless of the operating state. You may.
In the case of this configuration, as shown in the following (1), since there is no need to turn on and off the electromagnetic solenoid 59, the software configuration of the control device 33 is simplified.

(1) When the electromagnetic solenoid 59 is turned off due to a power failure or the like at the time of dehydration 1 and dehydration 2, the stopper 5
7 rotates and meshes with the coupling tool 46 and the intermediate gear portion 44c,
Since the rotation of the clutch lever 40 is restricted, the clutch 36 is held on the dehydrating side. Further, when the power is turned on at the time of recovery from the power failure, the stopper 57 rotates with the turning on of the electromagnetic solenoid 59 and separates from the coupling tool 46 and the intermediate gear portion 44c, so that the rotation of the clutch lever 40 is allowed. You.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. In the top cover 11a,
A storage battery 61 corresponding to a backup power supply is provided. The storage battery 61 is composed of an alkaline storage battery.
The DC power output through is charged. The power supply circuit 61a is mounted on the circuit board 30.

In the top cover 11a, a switching section 62 composed of a switch or the like is disposed. When no power failure occurs, the drain circuit 21, the water injection valve 23, the washing motor 26, the display, and the like are provided from the power supply circuit 61a through the switching section 62. 32, control device 33,
Drive power is supplied to the lever motor 42. In the event of a power failure, the state of the switching unit 62 is switched, and drive power is supplied from the storage battery 61 to the drain valve 21, the water injection valve 23, the washing motor 26, the display 32, the control device 33, and the lever motor 42 through the switching unit 62.

According to the above-described embodiment, when a power failure or the like occurs during dehydration, drive power is supplied from the storage battery 61 to the control device 33, and the operation status of the washing course and the water level sensor 51 and the like stored in the control device 33 are stored. Data is stored. At the same time, the control device 33 holds the lever motor 42 in the ON state via the drive circuit 53, so that the clutch lever 4
The zero guide portion 40a is held in a state of being retracted outside the rotation locus of the clutch 36. This prevents the clutch 36 from colliding with the guide portion 40a of the clutch lever 40 at a high speed or engaging with the clutch engagement portion 15a of the lower cup 15 at a high speed, thereby preventing deformation of the clutch 36. . In addition, since the holding mechanisms 56 and 60 are not required, the mechanical configuration is simplified.

In the fourth embodiment, charging power is supplied from the commercial AC power supply to the storage battery 61 through the power supply circuit 61a. However, the present invention is not limited to this. For example, the power is charged in advance. The storage battery 61 is disposed in the top cover 11a, or the dry battery is
1a, or a configuration in which electric power generated during braking by the washing motor 26 is charged in the storage battery 61. In the fourth embodiment, the alkaline storage battery 61 is used as a backup power supply. However, the present invention is not limited to this. For example, a lead storage battery or a solar battery may be used.

[0085]

As apparent from the above description, the washing machine of the present invention has the following effects. According to the first aspect, the holding mechanism is switched to the holding state in conjunction with the turning off of the drive source. For this reason, even if a power failure or the like occurs during dehydration, the clutch is held on the dehydration side, so that the clutch is prevented from being deformed by the impact at the time of the power failure. In addition, since the drive source of the clutch moving mechanism and the drive source of the holding mechanism are shared, the configuration is simplified.

According to the second aspect of the present invention, the clutch is held on the spin-drying side by constraining the cam plate in accordance with the moving position of the pin in the cam groove. For this reason,
This can be dealt with simply by adding a cam plate or the like to an existing washing machine, which is advantageous in applying a holding mechanism to an actual product. According to the third aspect, the holding mechanism is switched to the holding state in conjunction with the turning off of the drive source. For this reason, even if a power failure or the like occurs during dehydration, the clutch is held on the dehydration side, so that the clutch is prevented from being deformed by the impact at the time of the power failure. In addition, since the driving source for the moving mechanism and the driving source for the holding mechanism are separately provided, the control of the driving source for the holding mechanism is particularly simplified.

According to the fourth aspect of the present invention, since the movement of the clutch is restrained by the stopper, the holding mechanism can be brought into the holding state and the allowable state with a simple structure in which the stopper is moved in conjunction with the ON / OFF of the drive source. Can be switched. According to the means of claim 5, the holding mechanism is built in the geared motor. Therefore, the space occupied by the holding mechanism is reduced, which is advantageous in terms of compact design.

According to the means of claim 6, since the holding mechanism is switched from the holding state to the permissible state when the drive source is turned on again, the control of the holding mechanism is simplified. According to the means of claim 7, power is supplied from the backup power supply to the drive source during a power failure. For this reason, even if a power failure or the like occurs during dehydration, the clutch is held on the dehydration side, so that the clutch is prevented from being deformed by the impact at the time of the power failure. In addition, since no holding mechanism is required, the mechanical configuration is simplified.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention (a bottom view showing a moving mechanism and a holding mechanism).

FIG. 2 is an enlarged view of a holding mechanism (a is a bottom view, b is a cross-sectional view along line X1-X1, and c is a cross-sectional view along line X2-X2).

FIG. 3 is a longitudinal sectional view showing a direct drive mechanism.

FIG. 4 is a bottom view showing a direct drive mechanism.

FIG. 5 shows a geared motor.

FIG. 6 is a diagram showing an overall configuration.

FIG. 7 is a block diagram showing an electrical configuration.

FIG. 8 is a diagram showing the operation of the holding mechanism.

FIG. 9 is a view corresponding to FIG. 1, showing a second embodiment of the present invention.

FIG. 10 is a diagram corresponding to FIG. 8;

FIG. 11 is a view corresponding to FIG. 5, showing a third embodiment of the present invention.

FIG. 12 is a diagram corresponding to FIG. 8;

FIG. 13 is a diagram illustrating a fourth embodiment of the present invention (a diagram illustrating a power supply state to a lever motor).

FIG. 14 is a diagram corresponding to FIG. 3 showing a conventional example.

[Explanation of symbols]

18 is a rotating tub (washing tub), 25 is a rotor, 26 is a washing motor, 28 is a stirring body, 36 is a clutch, 47 is a cam plate, 47a is a cam groove, 50 is a pin, 55 is a moving mechanism,
56 is a holding mechanism, 57 is a stopper, 60 is a holding mechanism, 6
Reference numeral 1 denotes a storage battery (backup power supply), and 63 denotes a geared motor (drive source).

Claims (7)

[Claims] A washing tub into which laundry is put; a stirrer housed inside the washing tub and rotating with the operation of a washing motor; a dehydrating side connecting the washing tub and the washing motor;
A clutch movable to a washing side for shutting off between the washing tub and the washing motor; and
A movement mechanism for moving the clutch to the washing side; and a holding mechanism for switching the clutch to a holding state for holding the clutch on the spin-dry side and an allowance state for allowing the clutch to move from the spin-dry side to the washing side. The washing machine switches to a holding state when the drive source is turned off in a state where the clutch is moved to the spin-dry side. 2. A holding mechanism having a substantially heart-shaped cam groove, a cam plate that moves in conjunction with a clutch, and is movably engaged in the cam groove, and is responsive to a movement position in the cam groove. The washing machine according to claim 1, further comprising a pin for holding the clutch on the dehydrating side in conjunction with restricting the movement of the cam plate. 3. A washing tub into which laundry is put, a stirrer housed inside the washing tub and rotating with the operation of a washing motor, a dehydrating side connecting the washing tub and the washing motor,
A clutch movable to a washing side for shutting off between the washing tub and the washing motor; and
A movement mechanism for moving the clutch to the washing side; and a holding mechanism for switching the clutch to a holding state for holding the clutch on the spin-dry side and an allowance state for allowing the clutch to move from the spin-dry side to the washing side. A washing machine that switches to a holding state based on that a driving source different from the driving source is turned off in a state where the clutch is moved to a dehydrating side. 4. The washing machine according to claim 3, wherein the holding mechanism has a stopper that restrains the movement of the clutch in conjunction with the turning off of the drive source. 5. The driving source of the moving mechanism comprises a geared motor having a built-in holding mechanism, and the stopper of the holding mechanism locks the gear of the geared motor to restrain the operation of the moving mechanism, thereby dehydrating the clutch. The washing machine according to claim 4, wherein the washing machine is held on a side. 6. The holding mechanism switches from a holding state to an allowable state when the driving source is turned on again.
Or the washing machine according to 3. 7. A washing tub into which laundry is put, a stirrer housed inside the washing tub and rotating with the operation of the washing motor, a dehydrating side connecting the washing tub and the washing motor,
A clutch movable to a washing side for shutting off between the washing tub and the washing motor; and
A washing machine, comprising: a moving mechanism for moving to the washing side; and a backup power supply for supplying power to the drive source when the drive source is turned off.