KR200171890Y1 - Safety switch for a washing machine - Google Patents

Abstract

(Objective) The present invention relates to a safety switch for a washing machine, which can simplify the structure, improve the function and increase the quality.

(Composition) The present invention is accommodated in the electrical equipment room behind the lid of the washing machine, the first to third contact terminals are installed so as to be energized therein, the case is the elastic member is coupled to the front and bottom, respectively; One end is interviewed with the first contact terminal, the other end has a weight and is installed vertically downward through the elastic member of the bottom of the case, each end is unbalanced sensing hinged to the inside of the case to seesaw operation Terminals; And a door opening detecting terminal having one end interviewed with the third contact terminal, the other end being horizontally installed through the front elastic member, and hinged to the inside of the case so that each end is seesaw-operated. .

(Effect) The present invention has the effect of simplification of structure, improvement of its own function and improvement of quality.

Description

Washing machine safety switch

The present invention relates to a safety switch for a washing machine that prevents a safety accident by stopping the operation of the lid by opening the lid and detecting the eccentric flow of the water tank during the dehydration stroke of the washing machine (rotated at high speed). In particular, the present invention relates to a safety switch for a washing machine, which can simplify the structure, improve the function, and increase the quality.

In general, there are various types of washing machines, such as a vortex type washing machine, a drum type washing machine, a stirring type washing machine, etc., by a washing method. The most commonly used washing machine is a vortex type washing machine.

The vortex type washing machine generates water flow (upper / lower type, heart type, rotational direction type, etc.) by rotating the pulsator rotatably installed at the lower end of the washing tub 7 at a high speed as shown in FIG. In addition, it is one of the most widely used methods as a way to allow the water flow to wash the laundry contained in the washing tank (7).

The vortex type washing machine also has a washing tank (7) rotatably installed inside the water tank (6) installed inside the trauma (8) to receive the washing water, and the water flow in the lower portion of the washing tank (7) A pulsator for generating is rotatably installed, and the washing tank 7 and the pulsator are rotatably installed by a reduction gear assembly (not shown) mounted on the bottom of the water storage tank 6, but only the pulsator is installed. It is forward / inverted or the pulsator and washing tank 7 are integrally rotated in one direction.

The reduction gear assembly is rotatably installed by a driving force (by an electric belt) transmitted from a driving motor (not shown) installed adjacently. The pulsator is left or right driven by the decelerated output transmitted through the reduction gear assembly to perform a washing stroke and a rinsing stroke, and the washing tank 7 and the pulsator are rotated in one direction to perform a dehydration stroke. Will be. Therefore, the vortex type washing machine is to collectively perform a washing stroke, a rinsing stroke, a dehydration stroke, and the like in one tank.

In the drawings, reference numeral 1 denotes that the lid 3 is opened during the dehydration stroke or the water tank 6 is severely eccentric to detect and stop the operation of the washing machine, which is a safety switch to be dealt with in the present invention. 2 denotes the sensing lever 2 of the safety switch 1, 4 the hinge of the lid 3, and 5 denotes the weight balance of the reservoir 6.

The safety switch 1 of the conventional washing machine has a contact opening 11 coupled to the inside of the case as shown in FIG. 2, and a door open detection lever for operating the contact terminal 11 at the front end and the lower end of the case, respectively ( 9) and the detection lever (2) is coupled in a direction orthogonal to sense the eccentricity of the reservoir (6), and installed in the electrical cabinet of the upper part of the washing machine and the detection lever (2) is close to the reservoir (6) The door open detection lever 9 is installed to transmit the movement to the lid 3, which is closed in the upper direction about the hinge 31.

In addition, the safety switch 1 is extremely eccentric due to the eccentricity of the laundry during the dehydration stroke of the washing machine, or the door open detection lever 9 and the detection lever 2 when the lid 3 is opened. By detecting and immediately stopping the dehydration stroke, the user is prevented from accidental safety accidents caused by the washing tank or laundry rotating at high speed, and also prevents the internal structure of the washing machine from being worn or damaged. there was.

Since the sensing lever 2 is exposed and installed, there is a problem in that it is corroded by moisture, moisture, detergent, etc., and thus lacks reliability of operation.

In addition, water is introduced into the interfacial surface between the contact openings 11 of the door opening detecting lever 9 and the sensing lever 2 as shown in FIG. 4, so that a water film phenomenon occurs, thereby causing malfunction of the contact terminals 11. Along with the problem that the manufacturing process of the safety switch (1), due to the increase in the occurrence of defective products there was also a problem that the production cost increases.

The present invention has been made in consideration of the above circumstances, and its purpose is to detect the opening of the lid during the dehydration stroke of the washing machine, and to stop the operation by detecting the severe eccentric flow of the reservoir, and to prevent safety accidents in advance. In addition, to provide a safety switch for the washing machine to simplify the structure, improve the function and increase the quality.

In order to achieve the above object, in order to achieve the above object, in the dehydration stroke of the washing machine, the opening of the washing machine and the switch configured to stop the operation by detecting the severe eccentric flow of the water tank, are accommodated in the electrical compartment behind the washing machine lid A case in which the first to third contact terminals are provided so as to be energized therein, and the elastic members are respectively coupled to the front and bottom surfaces thereof; One end is interviewed with the first contact terminal, the other end has a weight and is installed vertically downward through the elastic member of the bottom of the case, each end is unbalanced sensing hinged to the inside of the case to seesaw operation Terminals; And a door opening detecting terminal having one end interviewed with the third contact terminal, the other end being horizontally passed through the elastic member of the front surface, and hinged to the inside of the case so that each end is seesaw-operated. To provide a safety switch.

1 is an exemplary view schematically showing an internal structure of a general washing machine;

2 is a schematic view showing an operating state of a safety switch applied to a conventional washing machine;

3 is a schematic plan view showing an operating state of a conventional safety switch,

4 is a partial cross-sectional view of a contact terminal of a conventional safety switch,

5 is an exemplary view showing a structure of a safety switch according to the present invention,

6 is a circuit diagram according to the present invention,

7a to 7d is an illustration of the operating state of the safety switch according to the present invention,

8 is an exemplary view showing a safety switch structure of another embodiment according to the present invention,

9 is a plan view of FIG. 8;

10 is an exemplary view showing a safety switch structure of another embodiment according to the present invention.

* Explanation of symbols on the main parts of the drawings *

3 ... lid 6 ... reservoir

7 ... washing tub 8 ... trauma

20 ... safety switch 21 ... case

22 ... 1st contact terminal 23 ... 2nd contact terminal

24 ... 3rd contact terminal 25, 28 ... elastic member

26 ... Unbalance Detection Terminal

27 ... Weight 29 ... Door open detection terminal

Next, embodiments of the present invention will be described in detail with reference to the drawings.

5 to 7 shows a safety switch for a washing machine according to the present invention, the safety switch for the washing machine and the case 21 is firmly coupled to the inside of the electric compartment formed on the rear side of the washing machine lid (3); The case 21 is composed of contact terminals 22, 23 and 24 electrically connected to a control unit in which a program of a washing machine is set, an unbalance detecting terminal 26 and a door opening detecting terminal 29.

The case 21 is formed in a rectangular cylindrical shape, the flange is integrally formed on the rear side of the upper surface is screwed and coupled to the electrical chamber, the lower side of the front and one side of the bottom surface are in contact with each inside Is formed. Conical elastic members 25 and 28 having waterproof and elasticity are fitted into the respective holes, and the elastic members 25 are formed on the bottom of the case 21. Each is fitted to the front of the coupling), and is formed having a hole that penetrates inside.

The contact terminals are composed of first, second and third contact terminals 22, 23, and 24, and are electrically connected or short-circuited. The third contact terminal 24 is bent at right angles to be installed in the case 21, and the first contact terminal 22 is a horizontal flat plate and has a predetermined distance from the horizontal portion of the third contact terminal 24. It is installed in parallel while maintaining, the second contact terminal 23 is installed in parallel in a horizontal flat while maintaining a constant distance from the vertical portion of the third contact terminal 24. In addition, the first contact terminal 22 has a semicircular arc-shaped bent portion formed at the interruption portion, the third contact terminal 24 has a semicircular arc-shaped curved portion formed at one end thereof, and the second contact terminal 23 is formed. The portion to be interviewed by the first contact terminal 22 is bent in an arc shape and the other end is formed with an arc-shaped bent portion.

The unbalance detecting terminal 26 is a metal wire type having elasticity, and a screw part is formed at one end, the other end is interviewed with a bent part of the first contact terminal 22, and the elasticity of the bottom of the case 21 is provided. Installed through the member 25, the hinge 32 is coupled to the inside of the case 21. The weight portion 27 is screwed to the end portion provided with the screw portion.

The unbalance detection terminal 26 is to be short-circuited with the first contact terminal 22 is changed in one direction by the reservoir tank when the reservoir tank in the dehydration operation of the washing machine in the normal state as shown in Figure 7a. (See FIG. 7B)

The door opening detecting terminal 28 is formed by fitting both side ends in a circular shape, one end is coupled to the hinge 30 in the case 21, the other end is an elastic member installed on the front of the case 21 Passing 28 will be located outside. The door opening detecting terminal 28 is formed of a metal wire having elasticity similar to that of the unbalance detecting terminal 26, and one end is interviewed with the bent part of the third contact terminal 24, and the other end thereof. It is installed to be interviewed on the upper surface of the flange of the washing machine lid.

The door opening detecting terminal 29 is positioned downward when the lid 3 is opened during the dehydration stroke in a state in which the lid 3 is closed as shown in FIG. 7C, and one end thereof is short-circuited at the third contact terminal 24. (See FIG. 7D)

The present invention constituted as described above, in which the water tank of the washing machine rotates to the normal state or the lid 3 is closed, that is, in the normal state, as shown in FIG. 5, the unbalance detecting terminal 26 is connected to the first contact terminal 22. The electricity is supplied, and the door open detection terminal 29 maintains the state in which the third contact terminal 24 is energized. In addition, when the dehydration tank is violently shaken during the dehydration stroke, the unbalance detection terminal 26 flows, short-circuits at the first contact terminal 22, and when the lid 3 is opened, the door open detection terminal 29 is downward. It is shorted at the third contact terminal 24 to stop the stroke of dehydration.

8 and 9 illustrate a safety switch for a washing machine according to another embodiment of the present invention. The safety switch for the washing machine is provided with a stepped contact terminal inside the case 21, and the first contact terminal 22. ) Is horizontal, the second contact terminal 23 is vertical at the end of the first contact terminal 22, the third contact terminal 24 is horizontal at the end of the second contact terminal 23 To install. In addition, the one end of the third contact terminal 24 is fixed by the fastener 36, so that the front end of the third contact terminal 24 performs the seesaw operation.

The bottom of the third contact terminal 24 is provided with a door-shaped door opening detecting terminal 34 of a vertical shape, the door opening detecting terminal 34 is formed inside the elastic button 33 made of a material having excellent elasticity It is installed and orthogonal to the flange upper surface of the lid (3).

Therefore, when the lid 3 is closed, the elastic button 33 and the door opening detecting terminal 34 are raised, and the second contact terminal 23 and the first contact terminal 22 are raised so that the washing machine is in a normal state. To be operated. In addition, when the lid 3 is opened during the dehydration stroke, the elastic button 33 and the door open detection terminal 34 are lowered, so that the contacts 22, 23, and 24 are energized to stop the dehydration stroke.

10 shows a safety switch for a washing machine according to another embodiment of the present invention, which is capable of hingeably coupling the first lever 39 to the front of the case 21, and also has a lower inner cover. The magnet 41 is provided on the side surface, the second lever 38 which can be hinged is installed inside the case 21, and the iron plate 40 corresponding to the magnet 41 is installed. The first and second contacts 22, 23 are provided to be orthogonal to (38).

Therefore, when the lid is closed during the dehydration stroke, the iron plate 40 of the second lever 38 is guided by the magnetic force of the magnet 41 installed on the first lever 39 so that the contact terminals 22 and 23 are closed. By energizing, the washing machine operates in a normal state. When the lid is opened during the dehydration stroke, the first lever 39 interferes with the lid and is opened in the case 21. When the magnetic force is lost on the iron plate 40, the contact terminals 22 and 23 are short-circuited. The dehydration stroke will be stopped.

Reference numeral 31 in the accompanying drawings denotes the hinge 31 of the washing machine lid 3.

As described above, according to the present invention, by installing an unbalance detection terminal and a door opening detection terminal that allow the contact terminal to be energized or short-circuited while the seesaw operation is performed inside the case, the structure is simplified, the self-function is improved, and the quality is improved. There is.

Claims (5)

In configuring the switch to detect the opening of the lid during the dehydration stroke of the washing machine and the severe eccentric flow of the reservoir to stop the operation, A case housed in the electrical compartment behind the lid of the washing machine, the first to third contact terminals are installed therein so as to be energized, and the elastic members are coupled to the front and bottom surfaces, respectively; One end is interviewed with the first contact terminal, the other end has a weight and is installed vertically downward through the elastic member of the bottom of the case, each end is unbalanced sensing hinged to the inside of the case to seesaw operation Terminals; And One end is interviewed with the third contact terminal, the other end is installed horizontally through the elastic member of the front, each end for the washing machine including a door opening detecting terminal hinged to the inside of the case to seesaw operation Safety switch. The method of claim 1, wherein the third contact terminal is bent at an angle, the first contact terminal is installed in parallel with the horizontal portion of the third contact terminal, the second contact terminal is the third contact terminal The safety switch for a washing machine is installed in parallel with the vertical portion of the one end is interviewed on the bottom of the first contact terminal The terminal of claim 1 or 2, wherein the first to third contact terminals are installed to be stepped so that the third contact terminal is fixed to one end to enable the seesaw operation, and the door open detection terminal is disposed on the bottom of the case. The safety switch for a washing machine, which is accommodated in an elastic button and installed vertically so as to be orthogonal to the washing machine lid. The first and second contact terminals of claim 1, wherein the first and second contact terminals are provided in parallel, and a second lever having an iron plate on one side is hingedly installed, and a first magnet having a magnet corresponding to the iron plate on the front of the case. Safety switch for a washing machine, characterized in that the lever is hingedly installed and interviewed perpendicular to the lid of the washing machine. The safety switch of claim 1, wherein the unbalance detecting terminal is adjusted by a weight.