JP2768568B2 - Door lock mechanism of drum type dehydration washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for unlocking a door even when a power failure occurs during an operation in which laundry to be washed is dehydrated while the door is locked. And a door lock mechanism for a drum-type dehydration washing machine capable of taking out the laundry.

[0002]

2. Description of the Related Art A conventional drum type dehydration washing machine (see FIG. 4).
In the above, the lock of the door 8 with respect to the main body case 1 was performed by a door lock mechanism as shown in FIGS.

In this lock mechanism, when the laundry is put into the drum 3 and the door 8 is closed, the tip of the lock shaft 29 urged by the lock spring 25 is engaged with an engagement hole formed in the end face of the door 8. The cover switch 38 is turned on by the cover switch lever 30 which is inserted into the cover 8 a and is retracted by the end face of the door 8.

When a start switch (not shown) is turned on in this state, the lock mechanism motor 21 operated by the control circuit 34 causes the lock lever 23 to lock the lock base 24.
Side, the lock shaft 24 is engaged with the through holes 24 and 29a of the lock base 24 and the lock shaft 29,
The door 8 was locked so as not to open during driving. on the other hand,
Lock shaft on the distal side divided into the proximal side and the distal side
A switch actuating member for actuating the lid switch,
Provide a power failure shaft (not shown) with holes
When rotation is stopped with the door locked,
When pulling the operation member connected to one end of the electric shaft
The through-hole of the power outage shaft
Engage with the protruding end of the lock shaft on the proximal end to
By pressing the lid button, the lock shaft on the tip side
Retract to unlock the door and open the door
To take out the laundry inside the drum
Was.

[0005]

However, in the conventional door lock mechanism , the operating member (rope) is pulled.
And the door lock mechanism is manually released.
Therefore, for example, the operation member is loosened or pulled too much
Of the lock shaft on the proximal side and the power failure shaft.
If the through hole does not fit well,
Since the shaft cannot be retracted, release the lock mechanism.
There is a problem that cannot be removed.

The present invention has been made in view of these circumstances. For example, in a lock mechanism, a lock shaft
Can be manually slid to a position where it does not engage with the door
Clearance required to unlock the slide member to enable
To prevent power failure or failure of the motor during operation of the washing machine.
When the door locks more, the lock shaft
Manually retract the tip and press the lid button on the door.
With this, the door lock mechanism is easily and securely released,
Provided is a door lock mechanism of a drum type dehydration washing machine capable of taking out a laundry in a ram outside .

[0007]

SUMMARY OF THE INVENTION The present invention provides a control circuit for controlling the operation, stop, and lock of a door of a drum type dehydrating washing machine, and a slidable tip of a lock shaft for engaging the door of the washing machine. A lock member for fixing the movement of the lock shaft, a lock lever for moving to the lock table, and an electric unit for driving the lock lever, wherein the control circuit is in operation of the washing machine. A lock mechanism that locks the door through the lock shaft by driving the electric drive unit to move the lock lever to a lock base, wherein the lock mechanism unit includes the lock mechanism. A lock member and a lock member are provided so that the slide member at the end of the shaft can be manually slid to a position where the slide member does not engage with the door.
Provide a gap required for unlocking between the tip of the shaft and
A door lock mechanism for a drum-type dehydration washing machine, characterized in that when the door is locked due to a power failure during operation of the washing machine or a failure of the electric unit, the door can be unlocked. is there.

[0008]

The power failure during the operation of the washing machine or the electric motor
When the door is locked due to a failure,
How to release the lock from the control circuit to the motorized part of the lock mechanism
Since no instruction to move the drum is issued , the laundry in the drum cannot be taken out.

However, the lock mechanism does not manually engage the distal end of the lock shaft with the door.
Locks slide members to allow them to slide into position
Since the clearance required for release is provided,
The door is locked due to a power failure or failure of the motor.
When the lock shaft is
The door lock mechanism by pressing the door lid button.
It can be easily and reliably released, and the laundry in the drum can be taken out.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Note that the present invention is not limited by this. FIG. 4 shows an example of a drum type dehydrating washing machine to which the present invention is applied.

In FIG. 1, a water tank 2 in a main body case 1 is
The upper part is elastically supported inside the main body case 1 by a plurality of springs 4, and vibrations during dehydration are prevented by a plurality of dampers 7 attached between the bottom part and the main body case 1. The drum 3 in the water tank 2 has horizontal shafts 6a and 6b fixed to both end surfaces supported by the water tank 2 via bearings 11 and 17.

The rotation of the drum 3 is performed by a drum drive motor 13 attached to the bottom of the water tank 2, a belt pulley 15 fixed to the rotating shaft of the motor, a belt pulley 18 fixed to the drum 3, The rotation is performed by a rotation transmission means including a belt 16 stretched between pulleys.

The washing water in the drum 3, which is rotated at a low speed, is discharged from a number of small holes (not shown) provided on the peripheral side surface and left and right end surfaces of the drum 3 into the outer water tub 2. The washing water and the rinsing liquid in the water tub 2 are drained to the outside of the dehydrating washing machine from the drain hose 14 connected to the bottom of the water tub 2 by opening the drain valve 12, and the washed laundry is rotated at high speed by the drum 3. The small holes of the drum 3 are dehydrated by the centrifugal force at this time.

The peripheral wall of the drum 3 is provided with an opening for taking in and out of the laundry, which is closed by a lid 10. A door 8 that can be opened and closed around a pivot is provided on the upper surface of the main body case 1. Is attached. The opening of the door 8 provided in the main body case 1 and the opening of the water tank 2 are connected by a waterproof packing 9, and the water tank 2 is sealed by the door 8.

FIGS. 1 to 3 show an example of a door lock mechanism provided at a portion indicated by reference numeral 5 in FIG. The door lock mechanism mainly includes lock means provided inside the upper surface of the main body case 1 to lock the door 8, and lock release means provided inside the door 8 to release the lock means of the main body case 1. ing.

The lock means comprises a lock base 24, a lock shaft 33, a slide member 32 provided at the tip of the lock shaft, and a lock spring 25. The lock base 24 fixed to the inner surface of the main body case 1 is provided with a guide hole 24a facing the end face side of the door 8 and a lock groove 24b in a direction perpendicular to the guide hole 24a.

The lock shaft 33 has a lock base 2 at the end.
4 and the lock base 2
4 at a position corresponding to the lock groove 24b.
A lock groove 33a having substantially the same size and shape as that of FIG. A slide member 32 is attached to a tip of the lock shaft 33 with a gap L required for unlocking.
These are integrally connected by a vertical screw 31. The distal end portion of the slide member 32 has an inclined surface whose upper surface is inclined obliquely downward toward the distal end side, and is automatically retracted by a component force acting on the inclined surface when the door 8 is closed. It has a shape.

The connection and release of the lock shaft 33 and the slide member 32 by the screw 31 are performed through an operation hole 1a provided in the main body case 1 above the screw 31. In addition, the lock shaft 33 and the slide member 32 that are integrally connected to each other are projected into an engagement hole 8 a provided on an end face of the door 8 by a lock spring 25 mounted between the lock base 24 and the slide member 32. To lock the door 8.

The slide member 32 and the lock shaft 33 moved to the position where the door 8 is locked are used by the lock function motor 2 for moving the lock lever 23 into the lock grooves 24b and 33a of the lock base 24 and the lock shaft 33.
1 keeps the locked state. Lock lever 23
Are driven by the lock mechanism motor 21 so that the lock grooves 24
When the lock shaft 33 and the slide member 32 are moved to positions where they do not engage with the
Side, and the lock of the door 8 is released.

FIG. 3 is an example of a control circuit diagram for controlling the present apparatus. A microswitch (normal ON type) 20 is connected to one connection circuit of the lock mechanism motor 21 in parallel with the triac 36, and one switch 22a of the two-circuit microswitch 22 is connected to the other connection circuit. And a triac 37 is connected in parallel.

The other switch 2 of the micro switch 22
The switch 2b is connected in series with the drum drive motor 13 connected in parallel with the lock mechanism motor 21.
They are operated in conjunction with each other so that 2a and the ON-OFF state are reversed. Reference numeral 38 denotes a lid switch that is turned on when the door 8 is completely closed. When the lid switch 38 is turned on, the microswitch 22 having the two-circuit configuration turns off the switch 22a.
F is turned on and 22b is turned on. Therefore, the drum 3 is rotated by the drum drive motor 13.

When the rotation of the drum 3 is detected by the drum rotation detection sensor 35 connected to the control circuit 34, the triac 36 is turned on by the input signal from the control circuit 34, and the lock mechanism motor 21 is operated to activate the triac 36. The lock lever 23, which has been in the unlocked position indicated by the broken line, is moved to a position where it is engaged with the lock groove 33a of the lock shaft 33. Triac 37 is ON while drum 3 is rotating
During the rotation of the drum 3, the triac 37 and the switch 22 of the microswitch 22 are turned off.
is turned off, and the door 8 is held in the locked state.

The control circuit 34 includes the drum rotation detection sensor 3
When 5 detects that the rotation of the drum 3 has stopped, the triac 37 is turned on in response to the detection signal. The lock mechanism motor 21 is rotated when the triac 37 is turned on,
The lock lever 23 is moved from the locked position to the original unlocked position, so that the lock shaft 33 can move freely.

As shown in FIG. 2, the unlocking means provided inside the upper surface of the door 8 includes a lid button 19 provided at the opening on the upper surface of the door 8 and rotatable inward,
And a release shaft 28.
The release shaft 28 is held at a position where it can be engaged with the engagement hole 8 a of the door 8 by two support members 8 b formed on the inner surface of the door 8, and the distal end of the release shaft 27 is held by the release spring 27.
a. Lid button 19
Is held by an engagement pin 28 a of the release shaft 28 so that the upper surface is flush with the upper surface of the door 8.

Next, the operation of the door lock function of this embodiment will be described. When the laundry is put into the drum 3 and the door 8 is closed, when the tip of the slide member 32 is engaged with the engagement hole 8a of the door 8, the lid switch lever 30 pressed by the end face of the door 8 causes a lid switch. 38 is turned on. When a start switch (not shown) is turned on in this state, the triac 36 is turned on by a signal input to the triac 36 from the control circuit 34, and the lock lever 23 is moved to the lock position by the lock mechanism motor 21 driven thereby. .

At this time, the switch 22a of the two-circuit micro switch 22 is turned off, and the switch 22b is turned off.
N, the rotation of the lock mechanism motor 21 is stopped, and the drum drive motor 13 is rotated. For this reason, during rotation of the drum 3, the lock lever 23 is locked by the lock grooves 24 of the lock base 24 and the lock shaft 33.
When the cover button 19 is pushed downward, the lock of the lock shaft 32 cannot be released by the release shaft 28.

Assuming that a power failure occurs in the above state in which the door 8 is locked, even if the rotation of the drum 3 is stopped,
Since the drum rotation detection sensor 35 cannot detect the stop and input a signal to the control circuit 34, the control circuit 34 cannot turn on the triac 37 and rotate the lock mechanism motor 21. Are kept locked.

In this case, a tool such as a screwdriver is inserted through an operation hole 1a provided on the upper surface of
When the connection by 1 is released, the slide member 32 can slide by the gap L with respect to the lock shaft 33. When the lid button 19 is pressed downward in this state, the release shaft 28 whose pressing pin 28a is pressed by the lid button 19 is moved in the direction shown by the arrow a against the urging force of the release spring 27. , Slide member 32
Against the urging force of the lock spring 25 by the gap L
Back in the same direction.

In this state, since the distal end of the slide member 32 is released from engagement with the engagement hole 8a of the door 8, even if the lock shaft 33 is locked,
The door 8 can be opened to take out the laundry in the drum 3. When the door 8 is opened, the slide member 32 released from the pressing in the direction a is returned to the original position by the urging force of the lock spring 25. Therefore, a tool such as a screwdriver is inserted from the operation hole 1a to insert the slide member 32. And lock shaft 33
Can be joined together by a screw 31, so that the slide member 32 and the lock shaft 33 are returned to the original state for normal operation, that is, the one-piece structure.

[0030]

According to the present invention, the lock mechanism has a gap required for unlocking the slide member so that the tip of the lock shaft can be manually slid to a position where the lock member does not engage with the door. Therefore, when the door is locked due to a power failure during operation of the washing machine or a failure of the electric unit, the sliding member at the tip of the lock shaft can be manually retracted , and the lid button of the door is pressed, so that the door is pressed. The lock mechanism can be easily and reliably released, and the laundry in the drum can be taken out.

[Brief description of the drawings]

FIG. 1 is a plan view showing a part of an embodiment of the present invention in cross section.

FIG. 2 is a longitudinal sectional view of a main part of FIG.

FIG. 3 is an embodiment of a control circuit diagram common to the present invention and a conventional apparatus.

FIG. 4 is a longitudinal sectional view of a drum type dehydration washing machine to which the door lock mechanism according to the embodiment is attached.

FIG. 5 is a plan view showing a conventional door lock mechanism.

FIG. 6 is a longitudinal sectional view of a main part of FIG. 5;

[Explanation of symbols]

1 body case, 1a operation hole, 3 drum 8 door, 8a engagement hole, 19 lid button, 23 lock lever, 24 lock base,
24a guide hole, 24b lock groove, 25 lock spring, 32 slide member, 33 lock shaft, 33a lock groove, 34 control circuit, L clearance required for unlocking.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takeshi Miyaji 1 Electricity Research Laboratory, Technology Development Division, Chubu Electric Power Co., Inc. 1 at 20 Kita-Sanzan, Odaka-cho, Midori-ku Chubu Electric Power Co., Inc. Electricity Research Institute, Technology Development Headquarters (56) References JP-A-4-361797 (JP, A) (58) Fields surveyed (Int. Cl. ⁶ , DB name) D06F 37/42 D06F 37/10 D06F 37/28

Claims (1)

(57) [Claims] 1. A control circuit for controlling the operation, stop and lock of a door of a drum type dehydrating washing machine, and slidably mounted on a tip end of a lock shaft for engaging a door of the washing machine.
A sliding member , a lock base for fixing the movement of the lock shaft, a lock lever for moving to the lock base, and an electric unit for driving the lock lever, wherein the control circuit is operated during the operation of the washing machine. A lock mechanism that locks the door through the lock shaft by driving the electric drive unit to move the lock lever to a lock base. A gap required for unlocking is provided between the slide member and the tip of the lock shaft so that the slide member at the distal end can be manually slid to a position where the slide member does not engage with the door. The door can be unlocked when the door is locked due to a power failure during operation of the vehicle or a failure of the electric unit. Door lock mechanism of the formula dehydration washing machine.