KR19990042126A - washer - Google Patents

Abstract

The present invention relates to a washing machine, and an object thereof is to provide an unbalance detection device for easily detecting unbalance through a reed switch and a magnetic material.

The washing machine according to the present invention has a lever provided on one side of the housing to move the contact during irregular rotation of the water tank, a magnetic body attached to the lever, a reed switch provided at a predetermined distance from the magnetic body, and elastic to the lever so as to elastically restore the lever. It is easy to install because it is turned on and off according to the proximity of the magnetic material and the reed switch by the member having a member, and it is possible to use it semi-permanently because no operation defect occurs due to burnout of the contact part.

Description

washer

The present invention relates to a washing machine, and more particularly, to a washing machine for detecting unbalance of a tank using a reed switch and a magnetic material.

In general, the washing machine is programmed to control the washing, rinsing, draining, and dehydration in advance to the microcomputer in the control unit, and the program can be selectively controlled by the user so that the laundry is automatically washed.

The washing machine having such a function is provided with a control unit on the upper part of the housing forming an external appearance, and a water tank in which washing water is filled is installed inside the housing. The washing tank is rotatably configured in the inside of the water tank, and a pulsator is formed at the center of the washing tank to form the washing water flow. In addition, the bottom of the water tank and the washing tank is provided with a drive unit having a motor that is rotated forward and backward to selectively transmit the driving force of the motor to the pulsator and the washing tank. The driving unit rotates the pulsator forward and backward in the washing stroke to perform the washing stroke, and after the washing stroke is completed, the washing tank rotates at a high speed to perform the dehydrating stroke.

On the other hand, the upper cover that covers the upper portion of the housing is provided with an unbalance detection device for controlling the irregular movement of the tank. This unbalance detection device is to remove noise and vibration caused by irregular rotation of the washing tank and the water tank due to the deflection in one direction when the laundry provided inside the washing tank is dehydrated. To adjust.

In the conventional unbalance detection apparatus, as shown in FIG. 1, the first contact portion 3a and the second contact portion 3b are disposed up and down inside the housing 7 having the front, rear, and upper portions thereof open, and the first A contact part fixing member 4 for fixing the contact part 3a and the second contact part 3b is coupled to the rear surface of the housing 7.

Below the second contact portion 3b is provided with an operating table 2 for moving up and down in accordance with the opening and closing of the washing machine lid (not shown), one end of which is fixed to the contact portion fixing member 4 and the other end thereof. It extends a certain length toward the front of the housing (7). In addition, the sensing lever 6 which is moved forward and backward by hitting the water tank (not shown) by an irregular rotational movement of the washing tank (not shown) is provided to extend downward of the housing 7. One end of the sensing lever 6 has a second movement hole (2a) is formed so that the operating table (2) can be installed through, the lower end of the sensing lever (6) is a predetermined length of the water tank (not shown) It is installed adjacent to the upper end of the. A spring 5 supporting the sensing lever 6 downward is provided between the bent sensing levers 6 opposed to the lower part of the housing 7. Also, between one end of the sensing lever 6 and the housing 7, the contact state of the first contact portion 3a and the second contact portion 3b is changed while moving up and down in accordance with the forward and backward movement of the detection lever 6. Contact converting means 1 is provided. The contact converting means 1 has a front portion inserted into the second movement hole 2a, and a first movement hole 7a is formed in the housing 7 corresponding to the contact converting means 1 so that the contact converting means ( Guide the up and down movement of 1).

The operation of the unbalance sensing device configured as described above is as follows. First, when the user closes the lid (not shown) of the washing machine, the operating table 2 is pulled up by the lid, and the contact converting means 1 is moved by the lifting movement of the operating table 2 to the second contact portion 3b. Is contacted to the first contact portion 3a. In this state, if an unbalance occurs due to the bias of the laundry during dehydration, the upper end of the tank (not shown) pushes the detection lever 6 backward. Accordingly, the contact converting means 1 moves downward, and the second contact part 3b falls from the first contact part 3a and sends a signal to the microcomputer (not shown) to send a signal of the driving part (not shown). The washing machine is stopped by turning off the power supply.

When the washing machine lid is opened, the second contact portion 3b and the first contact portion 3a are restored to their original state. Therefore, when such a situation occurs, the user opens the lid and evenly puts the laundry to be restarted to reduce operating noise and vibration and to prevent the washing machine from being overwhelmed.

However, in the conventional unbalance detection device, the twist of the operating table 2 is generated due to the heavy load of the lid, and since the first and second contact parts 3a and 3b are exposed to the outside, foreign matter penetrates and malfunctions are caused. There is a possibility to occur. In particular, when hot water is used, burnout of the contacts due to steam is generated, so that the safety of the contact portions 3a and 3b cannot be ensured. That is, since the connection between the two contact portions 3a and 3b is provided in a mechanical configuration, problems such as damage and poor contact due to repeated use may occur, thereby lowering the overall reliability of the washing machine.

The present invention is to solve this problem, the object of the present invention is to provide a lever that is moved in contact with the housing during irregular rotation of the tank, one end of the lever is attached to a magnetic material, the reed switch so as to be spaced apart from the magnetic body Providing a washing machine to detect the unbalance of the washing tank and the water tank according to the proximity of the reed switch and the magnetic material.

1 is a side cross-sectional view showing a conventional unbalance detection device.

Figure 2 is a side cross-sectional view showing the overall structure of a washing machine to which the present invention is applied.

3 is an exploded perspective view of the unbalance sensing device according to the present invention.

Figure 4 is a side cross-sectional view before operation of the unbalance detection device according to the present invention.

Figure 5 is a side cross-sectional view after the operation of the unbalance detection device according to the present invention.

6 is a control block diagram of the washing machine control unit according to the operation of the unbalance detection device of the present invention.

Explanation of symbols on the main parts of the drawings

10: housing 20: water tank 30: washing tank

50: drive unit 70: control unit 100: detection device

110: case 111: lead switch chamber 112: magnetic body chamber

113: hinge shaft hole 114: locking jaw hole 117: fastener

118: fastening hole 120: lead switch 121: wire

122: lead piece 123: glass tube 130: magnetic material

140: lever 141: hinge shaft 150: elastic member

In the present invention for achieving the above object, in the washing machine provided with a housing in which a wash water tank is installed in the housing, rotatably provided in the tank and the laundry is contained in the laundry to be washed and dehydrated, A lever provided at one side of the housing to move the contact during irregular rotation of the tank, an elastic member provided at the lever to elastically restore the lever, a magnetic body attached to the lever, and a predetermined distance from the magnetic body And it is on-off according to the proximity of the magnetic material is characterized in that the reed switch is controlled to operate the washing machine.

On the other hand, one end of the lever is provided adjacent to the upper surface of the tank, the other end of the lever is provided with a magnetic material, the middle of the lever is characterized in that the hinge shaft is provided to be rotatable.

In addition, the water tank is biased to one side due to the unbalance of the washing tank is turned on when the magnetic material approaches the reed switch, characterized in that to stop the operation of the washing machine.

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

Figure 2 is a side cross-sectional view showing the overall structure of a washing machine according to the present invention, Figure 3 is an exploded perspective view showing an unbalance detection device of the present invention. 4 and 5 are cross-sectional views showing before and after the operation of the unbalance detection device, and FIG. 6 is a control block diagram of a washing machine control unit connected to the unbalance detection device.

As shown in FIG. 2, a tubular water tank 20 having an upper side opened so that the washing water is filled in the housing 10 constituting the exterior body is provided by the suspension device 25. And the inside of the water tank 20 is installed rotatably installed, and a plurality of dehydration holes are drilled on the wall and the washing tank 30 is provided in a similar shape to the water tank 20 is configured. And the bottom of the washing tank 30 is provided with a pulsator 40 to form a washing water flow by rotating forward and backward.

The bottom of the housing 10 is provided with a drive unit 50 for driving the washing tank 30 and the pulsator 40, which transmits the motor 51 and the rotational force thereof to generate power through the belt 42 It consists of a power transmission device 52 for simultaneously or selectively rotating the pulsator 40 and the washing tank 30. In addition, an upper cover 12 is installed at an upper portion of the housing 10 to cover an upper portion of the housing. A lid 11 hinged to open and close the inside of the housing 10 is provided in the upper cover 12. Prepared.

On the other hand, the inner surface rear upper side of the housing 10 is provided with a sensing device 100 for controlling the operation of the washing machine by detecting the unbalance during the dehydration stroke of the washing machine. This will be described with reference to FIG. 3. As shown in FIG. 1, the unbalance sensing device 100 includes a case 110 on an enclosure coupled to the upper cover 12, a reed switch 120 inserted into and fixed to the inside of the case 110, and a reed switch 120. The magnetic body 130 is spaced apart from the predetermined interval is provided with an elastic member 150 is coupled to the lever 140 and the lever 140 is provided at the upper end to restore the lever 140.

The lever 140 has a lower end adjacent to the water tank, and a magnetic body 130 is installed at the upper end. In addition, a pair of hinge shafts 141 protruding outward from both sides of the magnetic body 130 at a predetermined interval are provided.

The elastic member 150 has a side wound in a circular shape to be coupled to the hinge shaft 141, and is bent to extend between the side of the lever 140 and the case 110 by extending upward and downward. It is fixed to the surface of the reed switch chamber side of the lever 140 and the bottom surface of the case 110.

The reed switch 120 has a predetermined overlap and a predetermined gap in a pair of lead pieces 122 in which magnetic material is pressed, and is a magnetically driven switch enclosed in the glass tube 123 together with an inert gas to an electrical contact. Precious metals such as platinum, gold, rhodium and ruthenium are plated in order to obtain excellent properties. As an internal inert gas, a mixture of nitrogen and hydrogen is generally sealed at normal pressure. The operation principle of the reed switch 120, when the reed switch 120 is placed on the magnetic continuity of the magnetic body 130, the lead piece 122 of the soft ferromagnetic material is magnetized in accordance with the direction of the magnetic field, respectively, the lead piece 122 This pole has an N pole and an S pole, and another pole is induced to pull the contact portion together, and the contact is closed when the magnetic suction force exceeds the mechanical elastic force of the press working portion.

The case 110 is formed as a rectangular enclosure having an upper side opened, and is isolated from both sides thereof to a magnetic body chamber 112 in which the magnetic body 130 is installed, and a reed switch chamber 111 in which the reed switch 120 is installed. The magnetic body 112 is divided and provided to form a space in which the magnetic body 130 can be rotated. The hinge shaft hole 113 to which the hinge shaft 141 of the lever 140 is coupled is provided at the side to allow the lever 140 to rotate. The hinge shaft hole 113 is spaced apart from the bottom surface of the case 110 by a predetermined interval and is positioned at about a middle in the left and right directions of the magnetic body chamber 112. And the lower surface is provided with a locking jaw hole 114 is provided so that the lower portion of the lever 140 can move only in one direction about the hinge shaft 141. As shown in the figure, the locking jaw hole 114 can rotate in the left direction around the hinge shaft 141 in the vertical state of the lever 140, and serves as the locking jaw in the right direction. And both sides of the case 110 is provided with a fastener 117 extending to the outside to be coupled to the upper cover 12, the fastening hole 118 is provided therein. Reference numeral 119 is a screw for coupling the fastener 117 and the upper cover 12.

The unbalance sensing device 100 configured as described above couples the hinge shaft 141 of the lever 140 to which the elastic member 150 is coupled to the hinge shaft hole 113 of the case 110, and to the reed switch chamber 111. The reed switch 120 is fixed, the wire 121 is drawn out to the outside, and filled with the foam material 170 to seal. Then, the case 110 is fixed to the upper cover 12 and installed by fastening as a screw 119.

Next, the operation of the washing machine according to the present invention configured as described above will be omitted since the general washing process is the same as in the prior art, and the dehydration stroke is performed when unbalance of the washing tank occurs with reference to FIGS. 4 and 5. Explain.

4 is a state in which the unbalance sensing device is not operated because the water tank is not eccentrically rotated, and FIG. 5 is a view of the activated state. 6 is a control block diagram of the washing machine control unit according to the operation of the unbalance detection device.

First, the laundry is placed eccentrically and the washing tank 30 is shifted from the center. When dehydration is performed in this state, the motor 51 is driven to rotate the washing tank 30. At this time, the unbalanced washing tank 30 hits the inner wall surface of the water tank 20 and vibrates it from side to side, so that the water tank 20 moves the lower end of the lever 140 to the left side of the hinge shaft 141. The magnetic body 130 is intermittently moved to the reed switch 110 in the upper side.

Accordingly, the reed switch 110, which is usually off, is turned on when the magnetic body 130 is in close proximity and is transmitted to the controller 70 as an electrical signal. By controlling the motor driver 51a so that the motor 51 is no longer driven, noise and damage due to unbalanced rotation are prevented.

That is, the reed switch 120 for inputting the on-off signal is electrically connected to the input side of the control unit 70 according to the proximity of the magnetic body 130, and the motor driving unit 51a for driving the motor 51 on the output side thereof. ) Is connected. In general, the reed switch 120 maintains the off (or on) state and is turned on (or off) when a sufficient magnetic field force formed in the magnetic body 130 is applied. That is, when the laundry is debalanced during the dehydration administration, when the washing tank 30 rotates unbalanced, the washing tank 30 collides with the inner wall surface of the water tank 20, and a situation in which the magnetic body 130 attached thereto approaches the reed switch 120 is repeatedly generated. . At this time, when the magnetic body 130 is close to the reed switch 120, it is turned on by the magnetic field of the magnetic body 130, and transmits it to the controller 70 as an electrical signal. When such a signal is input to the control unit 70 several times (typically two to three times), the motor driving unit 51a is controlled so that the motor 51 no longer operates.

Then, when the user opens the lid 11, the operation control of the control unit 70 is restored to its original state, and the dehydration operation is normally performed when the laundry is unevenly spread and then dehydrated again.

That is, the unbalance detection device of the present invention is installed so as to be spaced apart from the magnetic body 130 by a predetermined distance and is composed of a reed switch 110 that is on-off according to the proximity thereof to transmit an electrical signal to the control unit 70, the installation It is easy to use and can be used semi-permanently because there is no malfunction caused by burnout of contact part.

As described in detail above, the washing machine according to the present invention is stopped by the means for detecting the unbalanced rotation of the washing tank due to the imbalance of the laundry, the sensing device is turned on and off by the magnetic body and its magnetic field It consists of a reed switch that transmits a signal to the controller and seals the outside of the reed switch with foam material. Therefore, unbalance is detected by the operation of the reed switch due to the vibration of the water tank. The reed switch and the magnetic material can be easily installed, and the malfunction of the reed switch is prevented. have.

Claims (3)

In a washing machine provided with a housing in which a wash water fresh water tank is installed therein, and a washing tank rotatably provided in the water tank, in which laundry to be washed is carried out, and washing and dehydration is performed. A lever provided at one side of the housing to move the contact during irregular rotation of the water tank, an elastic member provided at the lever so as to elastically restore the lever, a magnetic body attached to the lever, and a predetermined distance from the magnetic body And a reed switch provided on and off according to the proximity of the magnetic material to control the operation of the washing machine. The method of claim 1, One end of the lever is provided adjacent to the upper surface of the tank, a magnetic material is provided on the other end of the lever, the washing machine, characterized in that the hinge shaft is provided in the middle of the lever to be rotatable. The method of claim 1, When the water tank is biased to one side due to the unbalance of the washing tank, the magnetic material is turned on to close the reed switch, the washing machine characterized in that to stop the operation of the washing machine.