KR200422722Y1 - Door switch for home appliance - Google Patents

Abstract

The present invention relates to a door switch for home appliances, the door switch for home appliances for detecting the opening of the door is installed on the door side panel of the home appliance, the housing mounted to the panel; A movable rod movably received in the housing and reciprocating between a protruding position protruding out of the housing and an accommodation position accommodated in the housing according to opening and closing of the door; A switching unit which contacts with the moving rod to switch contacts; It characterized in that it comprises an invasion prevention member spaced apart from the panel at predetermined intervals to prevent moisture or moisture outside the panel from penetrating into the switching unit.

As a result, moisture and moisture in the home appliance can be prevented from penetrating into the switching unit through the panel. Therefore, it is possible to prevent malfunction or malfunction of the door switch caused by an increase in the breakdown voltage due to invasion or short circuit between the contact terminals. It can prevent it beforehand.

Description

Door switch for home appliance {DOOR SWITCH FOR HOME APPLIANCE}

1 is a perspective view showing a front appearance of a washing machine equipped with a door switch for a conventional home appliance;

Figure 2 is a cross-sectional view of the door switch for home appliances shown in Figure 1,

Figure 3 is a sectional view showing the inside of the door switch for home appliances according to the present invention,

Figure 4 is an operation showing that the moving rod is moved to the receiving position in the door switch for home appliances shown in Figure 3,

5 is a perspective view showing the appearance of a home appliance door switch according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: Door switch for home appliances 10: Housing

10a: first housing 10b: second housing

10c: third housing

14 opening 15 connecting portion

20: moving rod 25: elastic member

30: switching unit 31: lever

32: Push 33: Contact terminal

33a: common terminal 33b: first terminal

33c: second terminal

34: contact plate 50: invasion prevention member

51: bulkhead 53: drain

81: main body case 82: washing tank

83: door 84: front opening

85: control panel 87: panel

The present invention relates to a door switch for a home appliance, and more particularly, to a home appliance, such as a washing machine, to a door switch for a home appliance that can prevent a short circuit or malfunction due to invasion such as water / humidity.

In general, home appliances such as washing machines, refrigerators, and microwave ovens are provided with door switches to prevent various safety accidents or energy consumption caused by the door being opened during operation of the appliance.

As an example, FIG. 1 shows a drum type washing machine equipped with the door switch 100 described above.

Referring to the drawings, the drum type washing machine is a device that accommodates laundry and washing water in a washing tank 82 provided inside the main body case 81 and washes them with various detergents. An operation unit 85 for selecting / operating washing conditions is provided. The provided front panel 87 and a door 83 for opening and closing the front opening 84 formed in the panel 87 to accommodate and remove the laundry into and out of the washing tub 82.

The door switch 100 is provided on one side of the panel 87 that can be in contact with the door 83, and generally has a configuration as shown in FIG.

Referring to the drawings, the door switch 100 for a home appliance according to the related art includes a moving rod 120 reciprocating according to opening and closing of the door 83, and a switching unit 130 switched in conjunction with the moving rod 120. The housing 110 includes a housing 110 mounted on the panel 87 to accommodate the moving rod 120 and the switching unit 130, and detects whether the door 83 is opened or closed according to the position of the moving rod 120. have.

However, the conventional door switch 100 for home appliances is frequently exposed to moisture or moisture in the home appliance, so the distance between the panel 87 and the contact terminal 133 of the switching unit 130 is too short. When water or moisture penetrates through a gap between the panel 87 and the housing 110 or a gap between the movable rod 120 and the housing 110, a short circuit between the contact terminals or an increase in the breakdown voltage frequently occurs. .

Such a short circuit or an increase in the withstand voltage causes a malfunction or inoperability of the door switch, making it impossible to detect whether the door is opened or closed, thereby causing a safety accident and energy consumption.

Accordingly, it is an object of the present invention to provide a door switch for home appliances that can prevent malfunction or malfunction of a door switch caused by an increase in internal voltage or short circuit due to invasion.

In order to achieve the above object, the present invention, a door switch for home appliances for detecting the opening of the door is installed on the door side panel of the home appliance, the housing mounted to the panel; A movable rod movably received in the housing and reciprocating between a protruding position protruding out of the housing and an accommodation position accommodated in the housing according to opening and closing of the door; A switching unit which contacts with the moving rod to switch contacts; And an invasion prevention member that separates the switching unit from the panel at predetermined intervals to prevent moisture or moisture outside the panel from penetrating into the switching unit.

Here, the invasion prevention unit may be provided as a partition wall provided between the panel and the housing.

Preferably, the partition wall may have a thickness of 2 to 6 mm.

The partition wall may be provided integrally with the housing.

Preferably, it may further include one or more drains formed through the partition wall to guide moisture or water penetrated through the panel to the outside of the housing.

Here, the switching unit, a lever that rotates in conjunction with the reciprocating movement of the moving rod, a pusher pressed and released by the lever, three contact terminals electrically connected to the main body control unit, the press and the press According to the release may include a contact plate for selectively electrically connecting any two of the three contact terminals.

Preferably, the housing may be provided with an opening formed on one side facing the panel, and a slide groove extending from the opening to the inside of the housing to guide the reciprocating movement of the moving rod.

Preferably, the slide groove may further include an elastic member for moving the moving rod from the receiving position to the protruding position by a restoring force.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 3, the home appliance door switch 1 according to the present invention is interlocked with a housing 10, a moving rod 20 provided to reciprocate in the housing 10, and a moving rod 20. An invasion preventing member 50 that prevents moisture or moisture outside the panel 87 from penetrating the switching unit 30 by separating the switching unit 30 and the switching unit 30 from the panel 87 at a predetermined interval. ).

Here, the invasion preventing member 50 may be provided as a partition wall having a predetermined thickness, and the partition wall may further include one or more drains 53 for guiding moisture or moisture to the outside of the housing 10. have.

Hereinafter, the configuration will be described in detail.

Prior to the description, in describing the specific embodiment of the present invention for the drum type washing machine shown in Figure 1 for example, the application of the present invention is not limited to this, it can be applied to various home appliances, such as a refrigerator, a microwave oven Make sure you know.

housing 10 and Moving rod 20

The housing 10 accommodates the switching unit 30 and the moving rod 20 therein and is mounted on the door 87 on the side panel 87 of the washing machine.

The housing 10 may be provided in various shapes and sizes. For example, the housing 10 has a first housing 10a having an opening 14 (refer to FIG. 5) to which the moving rod 20 is accommodated, facing the outside of the panel 87, and the switching unit 30. And a second housing 10b formed at one side thereof and having a slide groove 13 for reciprocating movement of the moving rod 20, and a third housing coupled to an upper portion of the second housing 10b to form an exterior. 10c, see FIG. 5).

The second housing 10b is provided inside the panel 87 with the invasion preventing member 50 therebetween.

A slide groove 13 for reciprocating the moving rod 20 is formed at one side of the second housing 10b extending to the opening 14 of the first housing 10a.

In this case, one end of the slide groove 13, that is, the opposite side of the opening 14 further includes an elastic member 25 for moving the moving rod 20 from the receiving position (B) to the projecting position (A) Can be.

The elastic member 25 returns the movable rod 20 from the receiving position B to the protruding position A when the door 83 is opened, thereby releasing the lever 31 pressed by the movable rod 20. To be possible.

The elastic member 25 may be provided in various kinds, for example, as shown in Figure 3, may be provided as a coil spring, as shown in Figure 2, elastic, such as natural rubber, synthetic rubber It may be provided as a material, or may be provided as a leaf spring.

The other side of the second housing 10b may be provided with a connecting portion 15 to which each contact terminal 33 of the switching unit 30 is connected to an external main body controller (not shown).

The moving rod 20 is movably accommodated in the housing 10 and protrudes a position protruding out of the housing 10 as the door 83 opens and closes, and an accommodation position accommodated in the housing 10. It is provided to reciprocate between (B).

The moving rod 20 is moved to the protruding position A by the elastic member 25 when the door 83 is opened, and is pressed by the door 83 when the door 83 is closed, so that the housing 10 is moved. It is moved to the accommodation position (B) accommodated therein.

The moving rod 20 rotates the lever 31 protruding into the slide groove 13 while reciprocating as described above so that the contact terminal is switched in accordance with the opening / closing state of the door 83 in the switching unit 30. do.

The moving rod 20 may be provided in various shapes. For example, as illustrated in FIG. 5, the movable rod 20 may be provided in a circular rod shape or may be provided in an angular rod shape.

Switching unit (30)

The switching unit 30 is interlocked with the moving rod 20 so that the contact point is switched.

The switching unit 30 generates and transmits different electric signals to the main body control unit according to whether the moving rod 20 is at the receiving position B or the protruding position A, and thus the main body control unit opens and closes the door 83. It can detect whether or not.

The switching unit 30 may be provided in various configurations. For example, as shown in FIG. 3, the lever 31 that rotates in conjunction with the reciprocating movement of the moving rod 20, the depressor 32 pressed and released by the lever 31, and the main body control unit. Three contact terminals 33 electrically connected to each other, and a contact plate 34 for selectively electrically connecting any two contact terminals 33 of the three contact terminals 33 according to the pressing and releasing of the clamp 32. ) May be included.

One end of the lever 31 is hinged to the housing 10 and the other end is provided to rotate in contact with the moving rod 20.

One side of the lever 31 is provided with a pusher 32, and moves the contact plate 34 while moving left and right in accordance with the rotation of the lever 31.

The contact terminal 33 is connected to the external main body control unit through the connection unit 15 from the inside of the housing 10.

The contact terminals 33 may be provided in various numbers. For example, one side of the contact plate 34 may be electrically connected to the common terminal 33a, and the other side of the contact plate 34 may be connected to the lever 31. It may include a first terminal 33b and a second terminal 33c connected or released according to the rotation.

The common terminal 33a is always in an electrically connected state to the contact plate 34, and the second terminal 33b is in the case where the moving rod 20 is in the protruding position, that is, the door 83 is in an open state. The contact plate 34 is electrically connected to the contact plate 34, and the movable rod 20 is electrically released from the contact plate 34 when the movable rod 20 is in a receiving position, that is, the door 83 is in an open state.

On the other hand, the first terminal 33b is electrically released from the contact plate 34 when the moving rod 20 is in the protruding position, and the contact plate 34 and the contact plate 34 when the moving rod 20 is in the accommodation position. Electrically connected.

Thus, when the washing machine is operated and the door 83 is in a closed state, current flowing through the common terminal 33a flows out through the first terminal 33b, but when the door 83 is opened. Since the current flowing through the common terminal 33a flows out through the second terminal 33c, the main body controller detects the difference in the current flow and determines whether the door 83 is opened.

Here, the above-described micro switch type switching unit 30 is only one embodiment for explaining the present invention, and of course, it can be modified in various configurations.

Invasion 浸濕 ) Prevention member 50

The invasion preventing member 50 is provided to prevent the moisture from entering the switching unit 30 to the switching unit 30 by separating the switching unit 30 from the panel 87 at predetermined intervals.

The invasion preventing member 50 may be, for example, a partition wall 51 provided between the panel 87 and the housing 10.

The partition wall 51 is provided between the first housing 10a and the second housing 10b to function as a blocking film to block the switching unit 30 accommodated in the second housing 10b from the panel 87.

Thus, in the case of the door switch 1 for a home appliance according to the related art, by separating the distance between the panel 87 and the switching unit 30 by a predetermined interval or more, moisture / moisture from outside the panel 87 is switched. It becomes possible to prevent the infiltration into (30).

Here, the thickness of the partition 51 may be provided in various ways, it is preferably provided in the range of 2 ~ 6 mm. Because, if the thickness of the partition wall 51 is too thick, the width of the door switch 1 itself is long, so it is not easy to mount it inside the panel 87. On the contrary, when the wall thickness is too thin, the partition wall 51 functions as a barrier. This can't be done properly.

More preferably, the thickness of the partition wall 51 may be provided in the range of 3 to 4 mm.

The drain 53 is formed to penetrate the partition 51 and is provided to guide moisture or water penetrated through the panel 87 to the outside of the housing 10.

The drain portion 53 guides the invasive moisture or moisture through the gap between the opening 14 and the movable rod 20 or the gap between the panel 87 and the housing 10 to the outside of the housing 10. To prevent penetration.

The direction of the drain 53 may be formed in various directions as necessary, but preferably, the water collected in the drain 53 is provided in a gravity direction so that water collected in the drain 53 may fall downward by its own weight. Of course, the drain 53 may be provided to be inclined obliquely.

The drain 53 may be provided in various numbers as necessary. For example, one may be provided in the partition 51, as shown in Figures 3 to 5, may be provided in two, may be provided in three or more.

In this case, when a plurality of drainage portions 53 are provided, the water collecting area, that is, the area where the infiltrated moisture or moisture is formed by water droplets is increased, so that the moisture-proof effect can be improved.

Invasion prevention member 50 may be provided integrally using the same material as the housing 10.

Hereinafter, the operation process of the door switch 1 for an electronic device according to the present invention having the above-described structure will be described by applying to the drum type washing machine shown in FIG. 1.

First, referring to Figure 1, the door switch 1 for home appliances according to the present invention is installed on one side of the front panel 87 of the main body case 81, the door 83 is mounted.

The first housing 10a is exposed to the outside of the panel 87, and at the front side of the first housing 10a, the movable rod 20 protrudes outward from the housing 10 to the outside (A, FIG. 3).

The user puts laundry and detergent into the washing tank 82, closes the door 83, and then operates the manipulation unit 85 to perform washing.

4 is a cross-sectional view of the door switch 1 with the door 83 closed. Referring to the drawings, the moving rod 20 is pressed in the direction of the arrow by the door 83 is accommodated inside the housing 10. When the moving rod 20 is received into the housing 10, the lever 31 in contact with the moving rod 20 moves the depress 32 while rotating to the right, and is interlocked with the depress 32. The contact plate 34 is released from the second terminal 33c and is in contact with the first terminal 33b.

Therefore, the current flowing from the common terminal 33a flows into the main body control unit via the first terminal 33b.

3 is a cross-sectional view of the door switch 1 in the state in which the door 83 is opened. Referring to the drawings, when the door 83 holding the moving rod 20 is released, the moving rod 20 is returned from the receiving position B to the protruding position A by the elastic member 25.

When the moving rod 20 returns to the protruding position A, the lever 31 interlocked with the moving rod 20 also moves to the left side, and the pusher 32 and the contact plate 34 move to the left side accordingly. do.

Here, the return of the lever 31, the pressing 32 and the contact plate 34 can be implemented using a separate elastic member 25 provided in the contact plate 34. For example, when the contact plate 34 is provided with a leaf spring and the lever 31 is released from the moving rod 20, the contact plate 34 returns to the position where the contact plate 34 is in contact with the first terminal 33b. The presser 32 and the lever 31 may be provided to move.

In the state in which the door 83 is opened, since the contact plate 34 is electrically connected to the first terminal 33b, the current flowing through the common terminal 33a flows out through the first terminal 33b. Therefore, the main body control unit detects the difference in the current flow to detect the opening of the door 83, and if necessary to stop the operation of the washing machine to prevent the safety accident in advance.

Here, while the washing is performed, the inside of the washing machine is in a wet or damp state by the washing water filled in the washing tank. The water filled in the washing tank is permeated into the panel 87 through the gap between the panel 87 and the housing 10 or between the moving rod 20 and the housing 10.

However, the door switch 1 for an electronic device according to the present invention is blocked by the partition wall 51 and the gap between the panel 87 and the switching unit 30 by more than a predetermined interval, so that water can penetrate the switching unit. In this way, it is possible to prevent malfunction or malfunction of the door switch caused by an increase in withstand voltage due to invasion or short circuit between the contact terminals.

In addition, in the case of providing the drainage portion 53 in the partition wall 51, water and moisture that have soaked through the gap of the panel 87 can be collected in the drainage portion 53 and fall downward due to its own weight. In addition, the invasive effect can be further improved.

Therefore, since the door switch for an electronic device according to the present invention can prevent a malfunction or failure of the door switch due to invasion, it is possible to prevent safety accidents or energy consumption caused by the door being opened during the operation of the electronic device.

The door switch for an electronic device according to the present invention is blocked with a gap between the panel gap and the switching part by more than a predetermined interval by the partition wall, thereby preventing water from penetrating into the switching part, thereby increasing the withstand voltage due to invasion or between contact terminals. The malfunction or malfunction of door switch caused by short circuit can be prevented.

In addition, when providing the drainage part in a partition, the water and moisture which permeated through the panel gap can be collected by the drainage part, and it can fall down by self weight, and an invasion effect can be improved further.

Therefore, since the door switch for an electronic device according to the present invention can prevent a malfunction or failure of the door switch due to invasion, it is possible to prevent safety accidents or energy consumption caused by the door being opened during the operation of the electronic device.

Claims (8)

In the door switch of the home appliance is installed in the door switch for home appliances for detecting the opening of the door, A housing mounted to the panel; A movable rod movably received in the housing and reciprocating between a protruding position protruding out of the housing and an accommodation position accommodated in the housing according to opening and closing of the door; A switching unit which contacts with the moving rod to switch contacts; And an invasion preventing member that separates the switching unit from the panel at predetermined intervals to prevent moisture or moisture outside the panel from penetrating into the switching unit. The method of claim 1, The intrusion preventing unit is a door switch for home appliances, characterized in that the partition wall provided between the panel and the housing. The method of claim 2, The thickness of the partition wall switch for home appliances, characterized in that 2 ~ 6 mm. The method of claim 2, The partition wall is a door switch for home appliances, characterized in that integrally provided in the housing. The method according to any one of claims 2 to 4, And at least one drainage part formed through the partition wall to guide moisture or water penetrated through the panel to the outside of the housing. The method of claim 1, The switching unit includes a lever that rotates in conjunction with a reciprocating movement of the moving rod, a pusher pressed and released by the lever, three contact terminals electrically connected to the main body control unit, and a pusher and a releaser of the pusher. The door switch for home appliances, characterized in that it comprises a contact plate for selectively electrically connecting any two contact terminals of the three contact terminals. The method of claim 1, The housing is provided with an opening formed on one side facing the panel, and a slide groove extending from the opening into the housing to guide the reciprocating movement of the moving rod is provided. The method of claim 6, And an elastic member provided in the slide groove to move the movable rod from the receiving position to the protruding position by a restoring force.

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