KR100335110B1 - door lock switch assembly in drum-type washing machine - Google Patents

Abstract

The present invention is to simplify the structure of the door lock switch assembly of the drum washing machine and to improve the operation reliability at the time of door lock (lock) and release (release).

To this end, the present invention is installed so that the switch case 1, the switch cover 2 coupled to the switch case 1, and rotatably installed on one side of the switch case 1 and receive a restoring force in the door opening direction. The latch holder 3 which is elastically installed and the latch holder 3 of the switch case 1 are installed on the side of the latch holder 3 while being lifted in the same direction as the hinge shaft 21 of the latch holder 3. A slide 4 to be restrained or released, a solenoid assembly fixed to a center portion of the switch case 1 to move the slide 4 up and down, and positioned under the slide 4 and switched according to the lifting of the slide 4. There is provided a door lock switch assembly of a drum washing machine, characterized in that it comprises a switching part for performing a switching action by a seesaw action of a terminal.

Description

Door lock switch assembly in drum-type washing machine

The present invention relates to a door lock switch assembly of a drum washing machine, and more particularly, to a door lock switch assembly that can simplify the structure and improve the operation reliability at the time of door lock and release.

In general, the drum washing method is a method of washing the laundry by using the friction force of the rotating drum and the laundry by receiving the driving force of the motor in a state in which detergent, washing water and laundry are put into the drum. Almost no, the laundry is not tangled with each other, knocking and rubbing has the advantage of producing a laundry effect.

Hereinafter, the schematic structure of the conventional drum washing machine and the structure of the prior art apparatus will be described with reference to FIGS. 1 to 5.

1 is a view illustrating a conventional drum washing machine, a tub (not shown) having a reservoir is installed inside the main body 13, and a drum 14 is driven at the center of the tub. It is installed to be rotatable under the power of (omitted).

And, the drum washing machine is provided with a door for loading and withdrawing laundry on the front of the main body (13).

In addition, the conventional drum washing machine is provided with a door lock device for preventing the detergent 15, washing water and laundry in the drum 14 to get dirty when the door 15 is opened during washing. .

The door lock device is composed of a door lock switch assembly provided inside the front surface of the main body 13 and a latch 16 provided at an end portion opposite to the hinge of the door 15.

2 to 5, the conventional door lock switch assembly includes a switch case 100, a switch cover 200 coupled to the switch case 100, and a front of the switch case 100 ( A latch hold 300 which is rotatably installed to have a restoring force in a direction in which the door locking is released in a front side and a right side in a rearward direction of the door of FIG. A slide 400 installed at the rear of the latch holder 300 of the switch case 100 so as to move forward and backward in a state inclined at a predetermined angle in a direction perpendicular to the axial direction of the latch holder 300, and the switch case ( 100. The plunger 6 and the plunger 6 are press-fitted into the fixing part 100a formed at the center part and sucked into the solenoid when the solenoid 5 is turned on, and the slide 400 is retracted to the right in the drawing. 6) advancing forward Solenoid assembly consisting of a compression spring (7) installed on the outer circumferential surface of the lock plunger (6), and the L-shaped or c-shaped switching terminal fixed to the rear cover 200 so that the contact portion is located on the side of the solenoid assembly, It comprises a door lock manual release operation lever 17 which is hinged to the lower side of the rear cover 200 to manually move the slide 400 to the rear to unlock the door.

At this time, the front end of the slide 400, a plurality of locking pieces-first locking piece (400a), the second locking piece to restrain the latch holder 300 so that the latch holder 300 does not return to the original position when the door is locked 400b), consisting of a third locking piece 400c, is formed, and the front end portion also forms an inclined surface 400d.

At the front end of the latch holder 300, a plurality of locking jaws, each of which comprises the first locking jaw 300a, the second locking jaw 300b, and the third locking jaw 300c, are formed at the locking pieces, respectively. do.

In addition, in the area between the first catching jaw 400a and the third catching jaw 400c at the distal end of the latch holder 300, the latch holder is driven by a force pushed by the latch 16 as the door 15 is closed. When 300 is rotated, avoiding grooves 300d and 300e are provided, respectively, to avoid interference with the second catching piece 400b and the third catching piece 400c of the slide 400, and the upper avoiding groove is provided. 300d (defining the upper portion of the figure in the upper direction) immediately below the second locking jaw (300b) immediately below the locking groove (300f) to which the second locking piece (400b) of the slide 400 mates when the door is locked It is formed successively.

In addition, a pressure inclined protrusion 300g is formed on the uppermost side of the end of the latch holder 300 so that the contact of the switch is turned off by pressing the slide 400 upward when the door is opened to be inclined with respect to the horizontal direction. The pressurized inclined protrusions are pushed by the inclined protrusions 300e of the latch holder 300 when the door is opened to the upper side of the first locking piece 400a of the 400 to incline the entire slide 400 with respect to the horizontal direction. 400e) is integrally formed.

That is, the second latching jaw 300b is provided with a pressing inclined protrusion 300g, a first catching jaw 300a, an upper avoiding groove 300d, and a catching groove 300f from the top to the lower end of the latch holder 300. ), The lower avoidance groove (300e), the third locking jaw (300c) is provided, the front end portion of the slide 400, the pressure inclined protrusion 400e, the first locking piece (400a), first The second catching piece 400b and the third catching piece 400c are formed.

On the other hand, between the one point of the upper side wall 400f of the slide 400 and the one point of the rear of the switch case 100, which is higher than the one side of the upper side wall of the slide 400, the slide 400 moves forward for the door locking. A compression spring 18 is installed to press the upper side wall 400f downward in the drawing so that the slide 400 is horizontal.

In addition, under the upper side wall 400f of the slide 400, when the slide is inclined according to the door lock release, the pressing unit 400g which presses the movable contactor 800 to be spaced apart from the fixed contactor 900. ) Is provided.

And, the door lock manual release operation lever 17, the knob (170) to which the strap 12 is hooked and connected to the outer surface of the switch case 100 when pulling the strap 12 Deformed and when the force to pull the strap 12 is removed, a plurality of elastic force piece 171 to position the operating lever 17 and a pull force is applied to the strap 12, as the elastic force piece 171 is deformed It is composed of a push rod 173 that pushes one side of the slide 400 to the rear while rotating about the hinge axis 172.

The operation of the conventional door lock switch assembly configured as described above is as follows.

First, a case in which the door 15 is closed and locked in the open state will be described below with reference to FIGS. 1 to 2B.

When the door is open as shown in FIG. 1, the door lock switch assembly is maintained as shown in FIG. 2A.

That is, in the state in which the door is opened, the slide 400 is pushed up by the pressing action of the pressing inclined protrusion 300g formed at the upper end side of the latch holder 300, and as shown in FIG. θ) to be inclined.

When the door is rotated about the hinge axis to close the door 15 in the open state as described above, the latch 16 provided at the tip of the door 15 pushes the latch holder 300, and thus the latch holder 300. ) Rotates about the hinge shaft 210 while elastically deforming the torsion spring (19).

As such, as the latch holder 300 is rotated, the pressing inclination protrusion 300g formed on the upper end of the latch holder 300 slides on the surface of the pressure inclination protrusion 400e of the slide 400. .

At this time, as the pressure inclined protrusion 300g gradually leaves the pressure inclined protrusion 400e, the slide 400 forms a horizontal state by the action of the compression spring 7 for pressing the slide upper side wall 400f. Direction, and at the same time, the second catching piece 400b and the third catching piece 400c protruding forward from the inclined surface 400d of the front end of the slide 400 are provided at the distal end of the latch holder 300 which rotates. The evacuation grooves 300d and 300e are moved to the position.

Thereafter, the rotation of the latch holder 300 is continued to reach the position where the interference between the front end of the latch holder 300 and the respective engaging pieces of the slide 400 is excluded, and the slide 400 is plunger ( 6) is pushed toward the latch holder 300 by the pushing force.

That is, when the interference between the front end of the latch holder 300 and the engaging pieces of the slide 400 is excluded, the plunger 6 is advanced by the restoring force of the compression spring 7 installed on the outer circumferential surface of the plunger 6, The slide 400 is advanced toward the latch holder 300 by the force pushed by the plunger 6.

Accordingly, each of the latching jaws 300a, 300b, 300c, and the engaging groove 300f of the latch holder 300 has the respective engaging pieces 400a, 400b of the slide 400 as shown in FIG. In this state, even if the force pushing the latch holder 300 is removed, the latch holder 300 does not return to the position when the door lock is released by the restraint of the slide 400.

In the state in which the latch holder 300 is caught by the slide 400 and cannot be turned back, the latch 16 provided at the front end of the door 15 is located inside the hook 3a of the latch holder 300. It is placed and constrained by the hook 3a, so that the door does not open.

On the other hand, in the state that the door is locked in this way, that is, the slide 400 is advanced by the pushing force of the plunger 6 to move forward and is not inclined on the horizontal line, the slide upper side wall 400f The position of the movable contactor 800 among the switching terminals is also changed by the change of the position of the), and the contact of the movable contactor 800 and the contact of the fixed contactor 900 correspond to each other by the positional change of the movable contactor 800. Is reached.

As described above, as the contact between the fixed contactor 900 and the movable contactor 800 comes in contact with the switch, power is supplied to the driving unit, the water supply valve, and the drain pump (not shown) of the washing machine.

Hereinafter, the process of automatically unlocking the door when the power is supplied to the solenoid assembly by pressing the door lock release button while the door 15 is locked will be described with reference to FIGS. 2B and 3A to 3C. same.

In the locked state of the door as shown in FIG. 2B, the contact is turned on to supply power to the solenoid assembly.

Therefore, as the user presses the door lock release button (not shown), when power is applied to the solenoid 5, the plunger 6 compresses the coil spring installed on the outer circumferential surface by the suction force of the solenoid 5. While moving the latch holder 300 in the opposite direction to the position.

At this time, the plunger 6 moving in the opposite direction to the latch holder 300 pushes the slide 400 in the same direction to retreat, and accordingly, the locking jaws 300a and 300b formed at the front end of the latch holder 300. Each latching piece 400a, 400b, 400c of the slide 400, which is located at 300c and the locking groove 300f, which prevents the rotation of the latch holder 300, is engaged with the latch holder 300 at a certain point in time. Out of the jaw and the locking groove.

As such, when the engaging pieces 400a, 400b, 400c of the slide 400 are out of the engaging jaw 300a, 300b, 300c formed at the tip of the latch holder 300, the latch holder 300 Is returned to the state when the door is opened by the restoring force of the torsion spring 11.

That is, when releasing the door lock according to the action of the solenoid assembly, the plunger 6 retracts and contacts the rear wall of the slide 400 as shown in FIG. 3A, so that the plunger pushes the slide 400 backwards. When the state 300 passes through the state of FIG. 3B, which is just before deviating from the interference of the slide 400, the restraint from the slide 400 is released so that the latch holder 300 of the torsion spring 11 can be released as shown in FIG. 3C. It rotates by the restoring force and returns to the state when the door is opened.

In other words, the slide 400 when the plunger 6 is retracted by the action of the solenoid 5 is retracted by the force pushed by the plunger 6, and the slide 400 when the retraction distance of the slide 400 passes a predetermined distance. And interference with the latch holder 300 are completely eliminated, the latch holder 300 is returned to the position when the door is opened, and thus the latch 16 is also released from the hook 3a of the latch holder 300 to lock the door. The state is released.

On the other hand, when the door lock release action as described above, the slide 400 is pushed upward by the pressing action of the pressing inclination protrusion (300g) formed on the upper end of the latch holder 300 at the moment when the restraint with the latch holder 300 is released. As a result, in the state where the latch holder 300 is completely in the original position, as shown in FIG. 3C, the slide 400 remains inclined at a predetermined angle θ with respect to the horizontal line. Same as the state shown.

When the door lock is released in this manner, as the slide 400 is pushed upward by the pressure inclined protrusion 300g, the movable contactor 800 which has maintained the contact with the fixed contactor 900 becomes the slide ( The pushing force of the pressing portion 400g of the 400 is displaced by the force, and thus the contact between the fixed contactor 900 and the movable contactor 800 is opened.

On the other hand, as the contacts between the fixed contactor 900 and the movable contactor 800 are opened, power cannot be applied to the driving unit, the water supply valve, and the drain pump of the washing machine.

Unlike the above, when the door is locked and the lock state of the door is to be released when the power is turned off to the washing machine due to a power failure or breakdown, the cover 20 is provided on one side of the lower side of the drum washing machine. ) And open the door lock switch assembly by pulling the strap 12 installed inside the cover 20 to release the locking state of the door. This process will be described with reference to FIGS. 4A to 4C. Same as

First, as the user pulls the strap 12 while the door is locked as shown in FIG. 4A, the manual release operation lever 17 connected to the strap 12 is centered on the hinge shaft 172. Rotate clockwise.

As such, when the manual release operation lever 17 is rotated, the push rod 173 integrally formed on the operation lever 1 retracts the slide 400 and passes the slide 400 and passes through the critical time point illustrated in FIG. 4B. When the interference with the latch holder 300 is released, the latch holder 300 is released by the restoring force of the torsion spring 19, thereby releasing the locked state of the door as shown in FIG. 4C.

On the other hand, when the force applied to the manual release operation lever 17 after the door lock release is removed, the operation lever is returned to its original position, which is the both ends of the elastic imparting piece 171 extending from the hinge portion of the operation lever This is because it is in contact with the lower surface (100).

However, such a conventional door lock switch assembly has several disadvantages in terms of structural and operational reliability.

First, a structure for interference and release of interference between the latch holder 300 and the slide 400 for locking the door is complicated.

That is, in the case of the slide 400, a plurality of engaging pieces 400a, 400b, 400c should be formed so that the latch holder 300 is caught on the front surface, and the slide 400 is the plunger 6 when the door is locked. The pressure inclined protrusion 400e having an inclined surface must be formed in order to maintain the same direction as the axis and to incline a predetermined angle with respect to the axis of the plunger 6 when the door is unlocked.

Meanwhile, the compression spring 18 installed between one point of the upper side wall 400f of the slide 400 and one point on the upper side of the slide behind the switch case 100 has the slide upper side wall when the slide 400 is advanced for the door locking. The pressure 400f is pushed downward in the drawing. As shown in FIGS. 2A to 4C, the pushing force does not coincide with the axial direction of the compression spring 18 so that the force transmission is inaccurate.

In addition, in the case of the latch holder 300, a plurality of locking jaw (300a) (300b) 300c and the locking groove that is caught on the engaging pieces 400a, 400b, 400c formed on the front surface of the slide 400 when the door is locked 300 f is to be formed, the upper one side of the pressure inclined protrusion (300g) to be switched off by pressing the pressurized inclined protrusion 400e of the slide 400 to the upper side to displace the slide 400 when the door lock is released. ) Should be formed (see Figure 5).

Second, since the operation structure for the switching of the conventional door lock switch assembly is very complicated, the installation structure for the switching action of the movable contactor 800 and the fixed contactor 900 is also complicated.

That is, since the switching action of the movable contactor 800 and the fixed contactor 900 does not coincide with the axial direction of the plunger 6 but is made in a direction perpendicular to the axial direction of the plunger, the operation structure for the switching action is complicated. Since the position of the contact point is located on the side of the solenoid (5) and the position of the power supply terminal is located at the rear end of the switch case, the length of the terminal is very long and its shape is not a straight line, but a curved b-shaped structure. Therefore, the terminal fixing structure provided in the switch case also becomes complicated.

And, since the switch in the direction orthogonal to the axial direction of the plunger (6) due to the movable contact (800) to make the contact opening action of the movable contact 800 and the fixed contact 900 when the slide 400 is reversed Pressurizing portion 400g to directly press and displace should be provided.

Therefore, the fixed structure of the movable contactor 800 and the fixed contactor 900 provided in the switch case 100 also becomes very complicated, and the structure of the latch holder and the slide becomes complicated, thereby degrading the manufacturability and assembly of the parts.

On the other hand, since the length of the terminal, such as the movable contactor 800 and the fixed contactor 900 becomes longer, the material cost according to the terminal production is expensive.

Third, in the conventional door lock switch assembly, when the door 15 is manually released in the door locking state, the pull force acts indirectly by the rotational movement around the hinge axis of the operating lever 17, so that a large force is applied to the operating lever operation. This is a disadvantage required.

That is, the operating force applied to the strap 12 is not immediately transmitted to the slide 400, but is formed integrally with the operating lever and the elastic imparting piece 171 whose end is in contact with the lower surface of the switch case 100 is deformed. Only when the end of the push rod (173) pushes the slide 400, the operating force should be large, in particular, the greater the deformation of the elastic force piece to increase the holding force of the elastic force piece pulls the strap 12 until the door lock is released There was a drawback that the power had to increase.

As described above, the conventional door lock switch assembly has a complicated operation structure for locking and releasing the door, and thus, the shape of the individual parts is also very complicated, and thus, a lot of difficulties are encountered during mold production, post-processing, and assembly. There are many problems such as poor operation reliability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide a door lock switch assembly of a drum washing machine, which can simplify the structure to improve the manufacturability and improve the operation reliability.

1 is a perspective view showing the appearance of a conventional drum washing machine and a conventional door lock switch assembly

2A to 2B are rear views with the rear cover removed to show the internal structure and door locking process of the conventional door lock switch assembly of FIG.

2A is a state diagram when the door is opened;

2B is a state diagram at the time of door locking

3A to 3C are rear views illustrating a door lock releasing process of a conventional door lock switch assembly.

Figure 3a is a state diagram at the time when the plunger is retracted by the action of the solenoid assembly to start pushing the slide back;

3b is a state diagram immediately before the door locking is released;

3C is a state diagram after unlocking the door

4A and 4C are rear views illustrating a manual door lock release process of a conventional door lock switch assembly.

Figure 4a is a state diagram before the operating force is applied to the manual release operation lever

4B is a state diagram immediately before the door locking is released by the operation force applied to the manual release operation lever;

4C is a state diagram after unlocking the door

5 is an exploded perspective view illustrating a coupling relationship between a conventional latch holder and a slide;

Figure 6 is an exploded perspective view showing the structure of the door lock switch assembly of the present invention

7a to 7b is a rear view showing a door locking process of the door lock switch assembly of the present invention,

7A is a state diagram when the door is opened.

7B is a state diagram after door locking

8A and 8B are rear views illustrating a door unlocking process of the door lock switch assembly of the present invention.

8A is a state diagram at the time when the plunger retracts and starts pushing the slide backward by the action of the solenoid assembly;

8B is a state diagram just before the door locking is released;

8C is a state diagram after unlocking the door

9A to 9C are rear views illustrating a manual door lock release process of the door lock switch assembly of the present invention.

Figure 9a is a state diagram before the operating force is applied to the manual release operation lever

9B is a state diagram immediately before the door locking is released by the operation force applied to the manual release operation lever;

9C is a state diagram after unlocking the door

Figure 10 is an exploded perspective view showing the coupling relationship between the latch holder and the slide constituting the door lock switch assembly of the present invention

11 is a perspective view showing the seesaw structure of the switching unit constituting the door lock switch assembly of the present invention

12A and 12B are schematic views illustrating another example of a structure of a switching unit of the door lock switch assembly of the present invention;

12A is a contact state diagram at the time of door locking

12B is a contact state diagram when the door is unlocked

FIG. 13 is a cross-sectional view showing the line I-I of FIG. 12A and illustrating a coupling state of the switch pressing piece and the movable contact;

14 is a cross-sectional view showing another example of FIG.

Explanation of symbols on the main parts of the drawings

1: Switch case 1a: Solenoid fixing part

2: switch cover 2a: through hole

3: Latch holder 3a: Hook

3b: latching portion 3c: recessed groove

4: Slide 4a: Stopper

4b: switch pusher 400b: through hole

401b: engaging jaw 402b: recessed groove

4c: Manual open / close knob

5: Solenoid 6: Plunger

7: compression spring 8: movable contactor

8a: Common contact terminal 800: Supporting jaw

801: projection 802: fixed groove

803: wire connection 804: bend

805: Release prevention protrusion 9: Fixed contact

10: power supply terminal 11: torsion spring

12: Strap 13: body

14: Drum 15: door

16: Latch

In order to achieve the above object, the present invention provides a switch case, a switch cover coupled to the switch case, a latch holder which is installed to be rotatable on one side of the switch case and is resiliently installed to receive a restoring force in a door opening direction; A slide installed at a side of the latch holder of the switch case to restrain or release the latch holder while being lifted in the same direction as the hinge axis of the latch holder, a solenoid assembly fixed to the center of the switch case and lifting the slide; The door lock switch assembly of the drum washing machine is provided, characterized in that it comprises a switching unit which is located in the lower portion and performs a switching action by the seesaw action of the switching terminal according to the lifting and lowering of the slide.

An embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 6 to 11 as follows.

Figure 6 is a perspective view showing the structure of the door lock switch assembly of the present invention.

7A to 7B are rear views illustrating a door locking process of the door lock switch assembly according to the present invention. FIG. 7A is a state diagram when the door is opened, and FIG. 7B is a state diagram after the door locking.

8A and 8B are rear views illustrating a door unlocking process of the door lock switch assembly of the present invention, and FIG. 8A is a state diagram of a point in time when the plunger is retracted by the action of the solenoid assembly to start pushing the slide backward. 8B is a state diagram just before the door locking is released, and FIG. 8C is a state diagram after the door locking is released.

9A to 9C are rear views illustrating the manual door lock release process of the door lock switch assembly of the present invention, and FIG. 9A is a state diagram before the operating force is applied to the manual release operation lever, and FIG. Fig. 9C is a state diagram immediately after the door locking is released by the operating force applied to the dragon operating lever.

On the other hand, Figure 10 is an exploded perspective view showing a coupling relationship between the latch holder and the slide constituting the door lock switch assembly of the present invention, Figure 11 is a perspective view showing a seesaw structure of the switching unit constituting the door lock switch assembly of the present invention.

The door lock switch assembly of the present invention includes a switch case (1), a switch cover (2) coupled to the switch case (1), and rotatably installed on one side of the switch case (1), and a restoring force in the door opening direction. The latch holder 3 is elastically installed to receive the latch holder, and the latch holder 3 is installed on the side of the latch holder 3 of the switch case 1 while being lifted in the same direction as the hinge shaft 21 of the latch holder 3. ), A slide (4) to restrain or release, a solenoid assembly fixed to the center of the switch case (1) to elevate the slide (4), and located below the slide (4) to the lifting of the slide (4) It comprises a switching part which performs a switching action by the seesaw action of the terminal which concerns.

At this time, one side of the latch holder 3, a hook (3a) that is latched to the latch 16 of the door front end when the door is locked is formed, the lower portion of the hook (3a) forming surface recessed groove 3c The locking part 3b which has () is formed.

One side of the slide 4 is in close contact with the bottom surface of the latch holder 3 when the door is unlocked, and the latch holder 3 is rotated by a predetermined angle or more by a pushing force of the latch 16 when the door is locked. Therefore, a stopper 4a is formed to engage the recessed groove 3c of the lower end of the latch holder 3 to restrain the latch holder 3 from returning to the door open position when the interference is released.

The stopper 4a and the recess 3c minimize the contact surface to minimize the friction force when the slide 4 is lowered to release the restraint, and the stopper 4a and the latch holder 3 are locked when the door is locked. The stopper 4a has an inverted V shape so that the state can be surely maintained, and the recessed groove 3c has a V shape having a wider inter-angle angle than the stopper 4a.

On the other hand, the switching unit is installed side by side on the movable contactor 8 and the movable contactor 8 installed on the lower side of the slide 4 of the switch case 1 so as to perform a seesaw action. A fixed contactor 9 having a fixed contact corresponding to the movable contact, and a power supply terminal 10 installed side by side on the other side of the movable contactor 8 so as to be opposite to the fixed contactor 9 and supplying power to the solenoid assembly; And a torsion spring 11 which is installed at one side of the switch case to impart rotational force to the movable contactor 8 such that both contacts of the movable contactor 8 and the fixed contactor 9 come into contact with each other when the door is locked.

At this time, the means for applying the rotational force to the movable contact 8 may be provided with a compression spring or a tension spring other than the illustrated torsion spring 11, but the movable contact 8 and the fixed contact 9 during door locking. Of course, the installation position should be determined so that the rotational force is applied to the movable contactor 8 in the direction in which the contact point is turned on.

On the other hand, as a support means for the seesaw movement of the movable contact 8, a common contact terminal 8a fixed to the lower part of the switch case 1 is provided.

At this time, the support jaw 800 that supports the movable contact 8 is provided inside the upper end of the common contact terminal 8a, and the common contact terminal is located outside the support jaw 800 of the upper end of the common contact terminal 8a. An anti-separation protrusion 805 is provided to prevent the movable contact 8 assembled from the common contact terminal from being separated from the common contact terminal. A common contact terminal 8a is provided at the central portion of the common contact terminal 8a in the longitudinal direction. When assembling in 1), a bent portion 804 and a recess groove 802 are provided to prevent the common contact terminal from being caught downward by being caught by a baffle integrally formed inside the switch case 1.

On the other hand, one side of the upper end of the common contact terminal (8a) is formed extending in the forward direction of the plunger 6 is exposed to the outside of the switch cover (2), the wire connecting portion 803 is provided with a wire.

In addition, at the center edge of the movable contact 8 which is assembled to the common contact terminal 8a, the movable contact of the movable contact 8 is separated from the common contact terminal 8a in its longitudinal direction, and the rotation angle of the movable contact 8 A projection 801 is formed to define the shape.

On the lower surface of the slide 4, a switch pressing piece 4b is disposed coaxially with the plunger 6 to press the movable contact 8 of the switching unit to open the contact when the slide 4 descends. .

At this time, the lower end surface of the switch pressing piece 4b is formed as an inclined surface so as to substantially coincide with the angle at which the movable contact 8 is inclined with respect to the horizontal direction when the door lock is released.

The solenoid assembly includes a solenoid 5 having a power supply terminal inserted into and fixed inside the fixing part 1a formed at the center of the switch case 1 and exposed through the switch cover 2, and the solenoid 5. A plunger 6 which is sucked into the solenoid and turns the slide 4 backward when turned on, and a compression spring 7 installed on the outer circumferential surface of the plunger 6 so as to advance the plunger 6 forward.

On the other hand, one side of the slide (4) is integrally formed with a manual opening and closing knob (4c) is connected to the strap 12 is applied to pull the pull 12 so as to lower the slide (4) when the locking state of the door manually released do.

At this time, the manual opening and closing knob 4c protrudes outward through the through hole 2a formed in the switch cover 2.

The operation of the present invention configured as described above is as follows.

First, a case in which the door locking action is performed by closing the door in the open state is as follows.

As shown in FIG. 7A, in the state at the time of the door opening, the top surface of the stopper 4a of the slide 4 is in close contact with the bottom surface of the latch holder 3, so that the slide 4 cannot rise any more. At this time, the contact of the switching unit is separated to maintain the off state.

As such, when the door 15 is rotated about the hinge shaft to close the door 15 in the open state, the latch 16 provided at the front end of the door pushes the latch holder 3, and thus the latch holder 3 has a torsion spring. It rotates, elastically deforming (19).

In this way, when the rotation angle of the latch holder 3 becomes greater than a certain angle during rotation, when the interference between the bottom surface of the latch holder 3 and the top surface of the stopper 4a of the slide 4 is eliminated, the plunger of the solenoid assembly (6) is raised in the upper direction by the restoring force of the compression spring (7) installed on the outer peripheral surface, the slide 4 is advanced along the axial direction of the latch holder (3) by the force pushed by the plunger (6). Thus, the latch holder 3 is positioned on the hook 3a forming surface side to block the return of the latch holder.

At this time, the V-shaped stopper 4a of the slide 4 is located in the V-shaped concave groove 3c formed in the locking portion 3b of the bottom surface of the latch holder 3.

On the other hand, as described above, when the door is locked, that is, by the pushing force of the plunger 6 in which the slide 4 is lifted up, it is opened to each other by the switch pressing piece 4b formed at the lower end of the slide 4. The contacts held in the state come into contact with each other.

That is, the movable contact 8 rotates clockwise around the hinge point by the restoring force of the torsion spring 11 installed on one side of the switch case at the same time as the slide 4 is raised, and thus the movable contact 8 ) And the contact of the fixed contact (9) abuts.

As described above, as the contact between the fixed contactor 9 and the movable contactor 8 comes into contact with the switch, the power is applied to the driving unit, the water supply valve, and the drain pump of the washing machine.

On the other hand, in the door lock state as described above, even if the force pushing the latch holder 3 is removed, the reversal of the latch holder 3 is prevented so that the latch 16 does not escape the hook 3a of the latch holder 3. .

As the latch holder 3 is caught by the stopper 4a of the slide 4 as described above, the latch holder 3 cannot be returned to the position at the time of opening the door. Thus, the latch 16 provided in the door 15 also has the latch holder 3. The hook (3a) of the state can not come out of the locking of the door is made.

Hereinafter, the process of releasing the door locking in the locked state will be described with reference to FIGS. 7B and 8A to 8C.

When the user presses the door lock release button (not shown) in the state of door locking as shown in FIG. 7B, and power is applied to the solenoid 5, the plunger 6 is formed on the outer circumferential surface by the suction force of the solenoid 5. While compressing the compression spring (7) installed in the axial direction of the latch holder (3) is moved downward in the figure.

At this time, the descending plunger 6 pushes the slide 4 downward in a downward direction from the time when the slide 4 touches the lower side wall of the slide 4 as shown in FIG. 8A, and accordingly, the latch holder 3 The stopper 4a of the slide 4 positioned along the hinge axis 21 direction of the latch holder 3 in the V-shaped groove 3c formed at the lower end of the latch holder 3 completely at the point of time. You get out.

That is, when the slide 4 descends due to the suction force of the solenoid 5 and passes through the states 8a and 8b, the stopper 4a of the slide 4 completely exits the lower end of the latch holder 3. The holder 3 is returned to the state of FIG. 8C which is a door lock release state by the restoring force of the torsion spring 11.

In other words, when the plunger 6 is lowered according to the operation of the solenoid assembly, the slide 4 is lowered together by the force pushed by the plunger 6, and the slide 4 and the latch holder 3 pass through a predetermined time point. As the interference is completely eliminated, the latch holder 3 returns to the position where the door can be opened.

When the door lock is released as described above, the opposite side of the contact of the movable contactor 8 of the switch pressing piece 4b provided on the bottom surface of the slide 4 is pressed, and thus the fixed contactor 9 and the movable contactor 8 are pressed. The contact is opened.

At this time, the torsion spring 11 accumulates the restoring force.

On the other hand, when the latch holder 3 rotates and returns to the state when the door is opened as described above, the latch 16 of the door that is restrained by the hook 3a of the latch holder 3 is restrained by the latch holder 3. In this state, as the contacts of the fixed contactor 9 and the movable contactor 8 are turned off, power cannot be applied to the drive unit, the water supply valve, and the drain pump of the washing machine.

Hereinafter, a process of manually releasing the door locking state will be described in detail with reference to FIGS. 9A to 9C.

When the power is turned off to the washing machine due to a power failure or breakdown while the door is locked, the cover 20 provided on one side of the lower part of the drum washing machine main body is opened, and the strap 12 is installed inside the cover 2. The door lock switch assembly is manually pulled out to unlock the door.

That is, as the user pulls the strap 12 in the door locking state as shown in FIG. 9A, a pulling force is applied directly to the manual open / close knob 4c formed at one side of the slide 4 and connected to the strap 12. As a result, the slide 4 immediately descends.

Then, if the interference between the slide 4 and the latch holder 3 is eliminated by the lowering of the slide 4 in this way, as shown in Figure 9c, the latch holder 3 is the door by the restoring force of the torsion spring 11 It returns to the position at the time of opening, whereby the latch 16 restrained by the hook 3a of the latch holder 3 is released from the restraint of the latch holder 16 and the door locking state is released.

12A and 12B are schematic views showing another example of the structure of the switching unit of the door lock switch assembly of the present invention, and FIG. 13 is a line I-I of FIG. 12A, wherein the switch pressing piece and the movable contact are coupled to each other. It is sectional drawing which showed state.

In this case, as in the above-described embodiment, a separate elastic member such as a torsion spring is not used to provide restoring force to the movable contactor, and the contact and opening of the fixed contactor are made using the elasticity of the movable contactor itself.

That is, in this case, the switching unit is installed to rotate about the hinge point by receiving the pressing force when the switch pressing piece 4b formed to be spaced a predetermined distance from the slide center on the lower side of the slide 4 and the tip of the upper surface. A movable contact 8 provided with a movable contact at the bottom thereof, a fixed contact 9 installed so that a fixed contact is positioned on an upper portion of the movable contact of the movable contact 8 so that the contact is opened when the switch is pressed down, and the fixed contact 9 It is installed so as to be located opposite the movable contactor (8) around the contactor and consists of a power supply terminal (10) for supplying power to the solenoid assembly.

In this case, as shown in FIG. 13, the movable contact 8 is installed to penetrate the through hole 400b formed at the distal end of the switch pressing piece 4b provided at one side of the lower side of the slide 4 to lift and lower the slide 4. The lifting force of the slide is directly transmitted to the movable contactor 8, and has a free end provided with a movable contact on the upper surface and a fixed end fixed on the switch case 1.

The operation of the switching unit configured as described above is as follows.

Fig. 12A is a state diagram of a contact state at the time of door locking, and in this state, the switch pressing piece 4b of the slide does not press the movable contact 8 so that the contact of the movable contact 8 and the fixed contact 9 is in contact with each other. In order to maintain the power supply, the driving unit of the washing machine, the water supply valve, and the drain pump (not shown) may be applied with power.

In this state, when the slide 4 is lowered by the door lock release action of the solenoid assembly or the door lock release action by manual operation, the switch pressing piece 4b provided on the slide presses the upper surface of the movable contactor 8. As a result, rotation of the movable contactor 8 occurs, and as shown in FIG. 12B, the movable contact of the movable contactor 8 is opened from the fixed contact of the fixed contactor 9.

As described above, when the slide 4 is raised and lowered, the movable contact 8 is installed to penetrate the through hole 400b of the switch pressing piece 4b, and is installed to receive the lifting force of the slide directly. It rotates reliably centering on and performs a switching action.

FIG. 14 is a cross-sectional view showing another example of FIG. 13. In this case, instead of forming the through hole 400b on the switch pressing piece 4b of the slide 4, the end portion of the slide pressing piece 4b is movable. A recess groove 402b having a locking jaw 401b for preventing the contact 8 from being separated is formed, and the movable contact 8 is positioned in the recess groove 402b to move when the slide 4 moves up and down. The lifting force of the slide 4 may be transmitted to the contactor 8.

At this time, in order to enable a structure that directly transfers the lifting force of the slide 4 to the movable contact 8, the material of the slide must of course be made of an insulating material such as plastic.

As described above, when the elasticity of the movable contactor 8 itself is used, the structure of the switching unit can be simplified, thereby reducing the number of parts of the door lock switch assembly and improving the assemblability.

On the other hand, the present invention is not limited to the above-described embodiment, it is a matter of course that the shape change or the material can be changed in various forms without departing from the scope of the technical idea of the present invention.

The present invention has the following advantages over the conventional door lock switch assembly described above by the configuration and operation as described above.

First, the conventional latch holder 300 and the slide 400 has a complicated structure for interference and interference cancellation, while the latch holder 3 and the slide 4 of the present invention have a simple structure.

That is, in the conventional door lock switch assembly, the slide 400 is inclined at an angle with respect to the direction orthogonal to the direction of the hinge shaft 21 of the latch holder 300, and then moves forward and backward, and the contact is again the slide 400. The design structure is very complicated because they must be contacted and opened in the direction orthogonal to the direction of motion of the waveguide.

In other words, in the conventional door lock switch assembly, the slide 400 should be positioned on the horizontal line when the door is locked while having the oblique inclined motion structure, and the slide 400 and the movable contact in the direction orthogonal thereto Very many factors have to be taken into account, as the on / off of the contacts must be done by interference.

Accordingly, the conventional door lock switch assembly is complicated in structure and the interference between parts is increased as much, and thus it is not easy to secure operational reliability.

On the other hand, the door lock switch assembly of the present invention is a simple linear motion of the slide 4, the design structure is simple and the operation reliability is increased by that.

That is, in the present invention, the movement direction of the slide 4 and the pushing direction of the plunger 6 coincide with each other, and the latch holder 3 is directly locked only when passing through the upper end surface of the stopper 4a. In proportion to this, the operation reliability is also improved.

Meanwhile, the conventional door lock switch assembly requires a large force because the pull 12 acts indirectly by a rotational movement about the hinge axis when the strap 12 is manually released, whereas the door lock switch assembly of the present invention has a strap ( Since the pulling force acting on 12) acts directly on the slide 4, the unlocking is easy and the force transmission is surely made with a small force.

In addition, while the conventional door lock switch assembly has a complicated terminal installation position and a long terminal length, the material is expensive.

That is, the conventional door lock switch assembly has a long and bent shape of the switching terminal, so the structure of the switch case for fixing the terminal must also be complicated, but the door lock switch assembly of the present invention has a short terminal length and The structure of the switch case is also simplified.

In particular, when the elasticity of the movable contactor itself is used, the structure of the switching unit can be extremely simplified.

As described above, the present invention is to simplify the structure of the door lock switch assembly and to improve the operation reliability.

Claims (4)

With switch case, A switch cover coupled to the switch case; A latch holder which is rotatably installed on one side of the switch case and is elastically installed to receive a restoring force in a door opening direction; A slide which is installed on the side of the latch holder of the switch case and rests or releases the latch holder while lifting in the same direction as the hinge axis of the latch holder; A solenoid assembly fixed to the switch case to lift and lower the slide; The door lock switch assembly of the drum washing machine, characterized in that it comprises a switching unit which is located under the slide and performs a switching action by the seesaw action of the terminal according to the lifting and lowering of the slide. The method of claim 1, The switching unit, A movable contactor which is installed to rotate around the hinge point when the switch pressing piece provided on the lower side of the slide is lowered and has a movable contact at the top end thereof; A fixed contactor installed so that a fixed contact is positioned above the movable contact of the movable contactor so that the contact is opened when the switch is pressed down; The door lock switch assembly of the drum washing machine, characterized in that it is installed so as to be located opposite to the movable contact with the fixed contactor, the power supply terminal for supplying power to the solenoid assembly. The method of claim 2, The door lock switch assembly of the drum washing machine characterized in that the movable contact is installed so as to pass through the through hole formed in the switch pressing piece provided on one side of the slide to directly receive the lifting force of the slide. The method of claim 2, Instead of forming a hole on the switch push piece of the slide, The door lock switch assembly of the drum washing machine, characterized in that to form a concave groove provided with a locking step to prevent the separation of the movable contact in the front end of the switch pressing piece, the movable contact is installed through the concave groove.