KR101009906B1 - Door-lock apparatus for electric household appliance - Google Patents

Abstract

The present invention relates to a door lock of a home appliance, the main body 10 having a latch insertion opening 11 formed on one side; A solenoid 20 mounted on the main body 10; A transfer block 30 which is reciprocated by the solenoid 20 and is provided with a catching protrusion 32 protruding to an upper surface thereof; A rotary cam 40 operated by the locking protrusion 32 of the transfer block 30; Consists of a contact portion 50 for controlling the operation of the solenoid 20 and whether the power of the product; The rotating cam 40 has a cutout hole 42 is formed in the flat plate, the locking projection 32 of the transfer block 30 is inserted into the cutout hole 42 is characterized in that the door lock is fixed or released. .

As a result, the configuration of the locking device is simple, making manufacturing and assembly easy, and further miniaturizing the door lock device.

Home Appliances, Door Locks, Washing Machines, Drum Washing Machines

Description

Door lock device for home appliance {DOOR-LOCK APPARATUS FOR ELECTRIC HOUSEHOLD APPLIANCE}

The present invention relates to a door lock device for a home appliance, and more particularly, to a door lock device for a home appliance in which a flat cam is driven by the operation of one solenoid to lock or unlock the latch.

Home appliances include various kinds of door locks (locks) according to their needs. In particular, a separate safety lock device is provided to solve the problem that a safety accident occurs due to the door being arbitrarily opened and closed while power is applied and operating. It will be included.

An example of the safety locking device may be a drum type washing machine, which includes a latch protruding from the door of the drum washing machine as shown in FIG. 1, and a locking device in which the latch is inserted and fixed is provided in the drum washing machine body.

The safety lock of the drum-type washing machine is kept in the unlocked state so that the user can manually open and close the door in the non-operational state when the power is not applied, and when the power is applied and the latch is inserted In order to prevent the latch from being released, the lock is locked to prevent the door from being opened and closed arbitrarily.

As such, in the case of the drum type washing machine, when the door is opened and closed between operations, a safety lock may be required to prevent this from happening as a safety accident may occur while the laundry is pulled out.

Various kinds of safety locking devices as described above are disclosed according to the method, and there is a door lock device which operates by changing a contact point while the bimetal embedded by a power supply is bent, and a flat cam moving horizontally or vertically therein. In this way, there is a door lock device for changing the fixing of the latch while the fixing plate is switched by the operation of the pin moving along the planar cam.

However, in the case of a door lock device using a bimetal, it is difficult to maintain a constant degree of the bimetal contact, so reliability as a safety lock device is problematic.

In addition, the door lock device using the flat cam and the pin has a problem that requires a separate fixing case for fixing the position of the pin moving on the flat cam is inconvenient to manufacture and assembly.

The present invention is to improve the problems of the prior art as described above, to provide a door lock device that can lock or unlock the latch by a simple operation of the transfer block and the rotary cam reciprocating through one solenoid There is a purpose.

Thereby, another object of the present invention is to provide a door lock device having a simple structure of the door lock device, which simplifies the manufacturing process and reduces the failure.

The present invention according to the above object is a latch insertion hole is formed on one side; A solenoid seated on the main body; A transfer block reciprocated by the solenoid and provided with a locking protrusion protruding upward; A rotary cam operated by a locking protrusion of the transfer block; Consists of a contact portion for determining whether the solenoid is in operation; The rotating cam is formed by a cutout hole formed in the flat plate, and a locking protrusion of the transfer block is inserted into the cutout hole to fix or release the door lock.

At this time, the rotary cam is a flat base plate of the appropriate size; A through hole formed at one side of the base plate; A catching plate formed by bending perpendicularly to the other side of the base plate; A sliding part formed in an arc shape along the end of the locking plate; A notch hole cut along the sliding part toward the center of the rotary cam; A space hole extending to the rear side along the cutout hole; It includes an inclined plate which is formed to be inclined toward the front side of the space hole.

The use of the present invention allows the transfer block reciprocated through one solenoid to lock or unlock the latch inserted by fixing or releasing its position by the rotary cam.

Moreover, the structure of the door lock device is simple to reduce the failure and has the advantage of easy assembly.

Hereinafter will be described in more detail with reference to the accompanying drawings showing an embodiment of the present invention.

The present invention is to provide a door lock device that is easy to manufacture and assemble in a safety door lock used in home appliances, using a single solenoid, a transfer block, and a flat cam.

To this end, as shown in FIGS. 2 and 3, the main body 10 having a latch insertion opening 11 formed on one side thereof; A solenoid 20 mounted on the main body 10; A transfer block 30 which is reciprocated by the solenoid 20 and is provided with a catching protrusion 32 protruding to an upper surface thereof; A rotary cam 40 operated by the locking protrusion 32 of the transfer block 30; It includes a contact portion 50 for controlling the operation of the solenoid 20 and whether the power of the product is applied.

At this time, the rotary cam 40 is formed with a cutout hole 42 in the flat plate, the locking projections 32 of the transfer block 30 is inserted into the cutout hole 42 is fixed or released the door lock.

Hereinafter, the configuration of the present invention will be described in more detail with reference to FIG. 3.

The main body 10 is a body of a door lock device in which a latch insertion hole 11 is formed at one side, and a proper space in which a solenoid 20, a transfer block 30, and a contact portion 50, which will be described later, is installed at one side thereof. Is formed.

At this time, after the solenoid 20, the transfer block 30 and the contact portion 50 is installed, the main body 10 includes a cover 12 to prevent the departure with the protection of this installation configuration.

In addition, the latch insertion hole 11 is provided with a slide bar 2 to be reciprocated in the transverse direction, the latch 3 inserted by the movement of this slide bar 2 is fixed or released.

The latch 3 is installed on the door side of the home appliance, the slide bar 2 is provided in the main body 10 is installed in the door frame of the home appliance to lock or unlock the door.

Herein, the main body 10 may be embodied in various forms to be easily implemented by those skilled in the art.

Solenoid (20, solenoid) is a device made by winding the wire tightly and uniformly in a cylindrical shape, when the current flows in the solenoid 20 is formed a magnetic field, the feed shaft 20 provided at one end is drawn in or out, By using this property, the transfer block 30 to be described later is reciprocated.

Since the solenoid 20 is a configuration that is commonly used, a detailed description thereof will be omitted.

The transfer block 30 is composed of a rectangular block, the upper surface of the block is coupled to the coupling groove 31 is fixed to the end of the feed shaft 21 of the solenoid 20, the locking projection having a suitable height 32 ) And contact protrusions 33 are respectively provided.

When the feed shaft 21 is drawn out by the operation of the solenoid 20, the transfer block 30 is transferred to one side thereof. The defect grooves 31 and the contact protrusions 33 formed on the upper surface thereof are formed by this operation. The effect of reciprocating is obtained.

At this time, the transfer block 30 is an elastic spring (S ₁ ) to closely contact the transfer block 30 toward the solenoid 20 so that when the current is blocked in the solenoid 20, the drawn feed shaft 21 can be returned to its original position. It includes.

Wherein the elastic spring (S ₁ ) may be carried out to the structure included in the solenoid side for easy implementation by those skilled in the art.

As a result, the transfer block 30 is reciprocally transferred by the solenoid 20 and the elastic spring S ₁ .

The rotary cam 40 is configured to fix and release the position of the transfer block 30 while repeating rotation and ascending by the reciprocating transfer of the transfer block 30, which is the base plate 41 of the flat plate as shown in FIG. And a through hole 42 formed at one side of the base plate 41, and having a stopping plate 43 formed by being bent vertically to the other side, and having an arc shape along the end of the stopping plate 43. Sliding part 44 and a notch hole 45 is cut along the sliding part 44 toward the center of the rotation cam 40, the space hole extending to the rear side along the notch hole 45 46 and an inclined plate 47 formed to be inclined toward the front side of the space hole 46.

The rotary cam 40 is located on the upper side of the transfer block 30 as shown in Figure 5 is installed so that the engaging projection 32 and the sliding portion 44 abut each other, the transfer block 30 is reciprocating Accordingly, the rotary cam 40 is rotated in one direction by pushing the sliding part 44. After the rotary cam 40 is rotated at an appropriate angle, the locking protrusion 32 is notched in the hole 45 of the rotary cam 40. ) Is inserted and locked.

The base plate 41 is maintained in rotation by the coil spring (S ₂ ), by which the locking projection 32 is inserted into the notch groove 45 by the elastic restoring force of the coil spring (S ₂ ) The rotating cam 40 is automatically returned to the original position by rotating.

At this time, the sliding portion 44 has a length that is relatively protruding relative to the side width of the rotary cam 40, which is when the rotary cam 40 is rotated in one direction by the movement of the transfer block 30, the locking projection The rotating cam 40 is rotated more than its width so that the 32 is easily inserted into the cutout hole 45, and the locking protrusion 32 passes through the sliding part 44 to the cutout hole 45. In the process of being inserted, the locking protrusion 32 is caught on the protruding end of the sliding part 44, so that the solenoid 20 does not release the hook even if the feed shaft 21 returns in a short time and is accurately caught in the cut-out hole 45. The group 32 is guided and inserted.

The contact portion 50 is composed of a solenoid 20 and a set for supplying or blocking a current, which is widely used in the structure of a conventional door lock device (switch), and a description thereof will be omitted.

Hereinafter will be described through an embodiment of the present invention.

<Examples>

6, the solenoid 20 and the transfer block 30 are coupled to one side of the main body 10, and the rotary cam 40 is brought into contact with the locking protrusion 32 of the transfer block 30. This is installed, the contact portion 50 for supplying or interrupting current to the solenoid 20 is installed.

At this time, when the current is supplied to the solenoid 20 through the contact portion 50, as shown in Figure 7, one end of the feed shaft 21 is drawn, the feed block 30 coupled to the feed shaft 21 is pushed Is moved.

When the transfer block 30 moves, the locking protrusion 32 pushes the sliding portion 44 at one end of the rotary cam 40. Since the sliding portion 44 is formed in an arc shape, the transfer block 30 is the sliding portion. When the 44 is pushed, the rotary cam 40 is rotated about the through hole 42.

On the other hand, when the rotary cam 40 is pushed by the locking projection 32 and rotated at an appropriate angle, the locking projection 32 is inserted into the notch hole 45 formed in the side of the rotating cam 40, as shown in FIG. As the pressure pushing the rotary cam 40 is released, the rotary cam 40 is returned to its original position by the restoring force of the coil spring S ₂ .

At this time, the locking protrusion 32 is guided by the protruding length of the sliding portion 44 and guided into the cutout hole 45 direction, and the fitted locking protrusion 32 is inclined plate formed at the center side of the base plate 41 ( 47 is maintained in contact with the side, even if the current applied to the solenoid 20 is cut off, the transfer block 30, the locking projection 32 is fitted into the cut-out hole 45 is maintained.

When the transfer block 30 is moved in this way, as shown in FIGS. 9 and 11, the locker 1 located at the bottom thereof is lowered by the movement of the rail R at the bottom of the transfer block 30, and the lowered locker 1 is moved. ) To fix the slide bar (2) to secure the latch (3) inserted into the latch insertion opening (11).

That is, in the state where the power is not applied to the home appliance, the locker 1 fixing the slide bar 2 is maintained in an elevated state, so that the door can be opened and closed freely, and the solenoid 20 operates in the state where the power is applied. The transfer block 30 is transferred, and the locker 1 is lowered by the movement of the transfer block 30 so that the slide bar 2 fixes the side of the latch 3 to lock the door between the operations of the home appliance.

On the other hand, after the operation of the home appliance is finished, the power is applied again to the solenoid 20 as shown in FIG. 10 to unlock the door. For this purpose, the feed shaft 21 of the solenoid 20 is again drawn out to transfer the block. Push (30).

As a result, when the transfer block 30 is pushed up, the catching protrusion 32 fitted into the notch hole 45 is pushed up to the space hole 46 formed in the base plate 41, and the catching protrusion 32 abuts against the inclined plate 47. As the rotation cam 40 is rotated by the coil spring (S ₂ ) is moved to the position where the inner surface of the space hole 46 and the engaging projection 32 abuts.

When the locking projection 32 is moved in this way, the moving pressure acts by the elastic spring S ₁ that presses the transfer block 30 in the direction of the solenoid 20. Since the operation of the solenoid 20, which suppresses this, is released. The transfer block 30 is transported and returned only by releasing the locking protrusions 32 fixed to the rotary cam 40.

At this time, as the conveying block 30 is moved, the rotary cam 40 moves out of the catching protrusion 32 fitted by the inclined surface of the inclined plate 47 as shown in FIG. 10B, and the conveying block 30 is moved back.

On the other hand, the present invention is further provided with a manual operation strap (L) to open and close the door by manually operating it when the emergency check is not applied as shown in Figure 6, pull the manual operation strap (L) By moving the transfer block 30 can be operated by the operation of the rotary cam 40 manually.

1 is a perspective view showing the structure of a drum washing machine,

Figure 2 is a perspective view of a door lock device for home appliances according to the present invention,

3 is an exploded perspective view of the door lock device for home appliances according to the present invention;

4 is a perspective view showing the structure of a rotating cam according to the present invention;

5 is a perspective view showing a combination of a transfer block and a rotary cam and a solenoid according to the present invention;

6 is a plan view of the door lock device for home appliances according to the present invention;

7 and 8 are a plan view showing the operation of the transfer block and the rotary cam according to the present invention,

9 and 10 are side views showing the operation of the transfer block and the rotary cam according to the present invention,

11 is a use state diagram showing the latch of the door lock device according to the present invention.

[Explanation of symbols on the main parts of the drawings]

1: locker 2: slide bar

3: latch 10: body

11: latch insert 12: cover

20: solenoid 21: feed shaft

30: transfer block 31: coupling groove

32: engaging projection 33: contact projection

40: rotating cam 41: base plate

42: through hole 43: stopping plate

44: sliding portion 45: notch hole

46: space hall 47: inclined plate

50: contact part R: rail groove

S ₁ : elastic spring S ₂ : coil spring

L: manual strap

Claims (5)

In the door lock device used for home appliances, A main body 10 having a latch insertion hole 11 formed at one side thereof; A solenoid 20 mounted on the main body 10; A transfer block 30 which is reciprocated by the solenoid 20 and is provided with a catching protrusion 32 protruding to an upper surface thereof; A rotary cam 40 operated by the locking protrusion 32 of the transfer block 30; Consists of a contact portion 50 for determining whether the solenoid 20 is operating; The rotating cam 40 is a flat base plate 41 of the appropriate size; A through hole 42 formed at one side of the base plate 41; A catching plate 43 formed by bending perpendicularly to the other side of the base plate 41; A sliding part 44 formed in an arc shape along the end of the locking plate 43; A notch hole 45 cut along the sliding part 44 toward the center of the rotary cam 40; A space hole 46 extending to the rear side along the notch hole 45; Including the inclined plate 47 is formed to be inclined toward the front of the space hole 46, the locking projection 32 of the transfer block 30 is inserted into the cutout hole 45 is characterized in that the door lock is fixed or released Door lock device for home appliances. delete The method according to claim 1, Door lock device for home appliances, characterized in that it further comprises a coil spring (S ₂ ) to close the base plate 41 in one direction. The method according to claim 1, The transfer block 30 is a door lock device for home appliances, characterized in that it is further provided with an elastic spring (S ₁ ) to be in close contact with the solenoid (20) side. The method according to claim 1, The sliding portion 44 is configured to protrude relative to the width of the side of the base plate 41 of the rotary cam 40; The door lock device for household appliances according to claim 1, wherein the locking projection 32 is guided to the cutout portion 45 when the locking projection 32 is returned.

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