KR100403025B1 - Washing machine equipped door operating sensor - Google Patents

Abstract

The present invention discloses a door opening and closing detection device of a fully automatic washing machine.

A door for opening and closing a washing machine inlet, a pressing piece that rotates according to the opening and closing operation of the door, at least one piezoelectric element having a piezoelectric effect under pressure by the pressing of the pressing piece, and receiving an electrical signal from the piezoelectric element to output a sensing state It is characterized by consisting of an output unit. Accordingly, the position and space is free when installed, and can be used semi-permanently, thereby improving the quality and reliability of the washing machine. In addition, since the operation is not made of a mechanical switch, the deformation or frictional noise of the door open / close detection device does not occur, thereby improving the performance and function of the washing machine.

Description

Washing machine equipped with a door opening and closing device {Washing machine equipped door operating sensor}

The present invention relates to a door opening and closing detection device of the washing machine, and more particularly, to a door opening and closing detection device for quickly and accurately detecting the opening of the door during washing or dehydration stroke to prevent a safety accident.

In general, a washing machine puts laundry into a water tank and supplies water, and when the washing administration is completed, the washing tank is rotated to dehydrate the washing to end.

During the washing, rinsing or dehydration of the washing machine, when the user opens the door 3 to inject detergent or softener, the washing machine which is in progress for the safety of the user is stopped. Therefore, in general, the washing machine is provided with a door opening / closing detection lever 9a so as to stop the stroke of the washing machine in progress by detecting the opening and closing of the door 3.

As shown in FIG. 1, the door opening / closing detection lever 9a according to the related art extends a predetermined length to the door 3 and the rear of the door 3 that open and close the upper surface of the main body to the upper end portion 52a of the main body of the washing machine. The pressing piece 7 which protrudes so as to interlock and rotate in accordance with the opening / closing operation of the door 3 is installed, and a safety switch 9 is installed at the rear part of the door 3 to press the button when opening and closing the door 3. The door opening and closing detection lever 9a is operated in accordance with the operation of the piece 7.

The safety switch is composed of a door opening and closing detection lever (9a) largely operated by opening and closing of the door 33 and a vibration detection lever (9b) for detecting the imbalance rotation of the washing tank when dewatering.

That is, the safety switch (9) is vertically outwardly downward of the door opening and closing detection lever (9a) and the body (9c) so that the micro-switched body (9c) and horizontally outward of the body (9c). Vibration detection lever (9b) and the fixed contact fixed in the body (9c) and the fixed contact and the door opening and closing detection lever (9a) and the vibration detection lever (9b) is installed so as to come out to rotate left and right by the eccentric rotation of the washing tank Combination of the movable contact is detached by the operation of the) and the upper end 52a of the vibration sensing lever (9b) is composed of a cam that is connected to the movable contact at the appropriate position to operate together in accordance with the operation of the vibration sensing lever (9b) do.

The conventional apparatus as described above, when the door 3 of the washing machine is opened, the movable contact is dropped to the fixed contact installed in the body 9c of the safety switch 9 by the door opening and closing detection lever 9a. It can be seen that the door 3 is opened by transferring to the microprocessor 49.

Therefore, according to the door opening and closing detection of the door opening and closing detection lever (9a) of the safety switch (9) is to pause the progress. However, the function of the safety switch 9 is often malfunctioned by combining the door opening and closing detection operation of the washing machine with the vibration detection operation according to the eccentric rotation of the washing machine.

For example, when the user opens the door 3, the contact point of the safety switch 9 repeatedly turns on / off to cause chattering, and the microprocessor 49 that detects this is recognized as an eccentric rotation of the washing tank. There was a problem such as a malfunction occurring in the rinsing stroke.

In addition, the installation position is limited to the rear portion of the washing machine and in contact with a portion of the door (3) there is a problem that the deterioration with respect to opening and closing the door (3) in the long-term use with the possession that deformation may occur.

Accordingly, an object of the present invention is to comprise a piezoelectric element having a piezoelectric effect for detecting the opening and closing of the door generated during the dehydration stroke of the washing machine and a microprocessor for sending a control signal by the electrical signal output from the piezoelectric element. It is to provide a door opening and closing detection device of the washing machine.

1 is a top cross-sectional view of a conventional washing machine

2 is a perspective view of a safety switch of a conventional washing machine

Figure 3 is a cross-sectional view attached door opening and closing detection device according to the invention

4 is an operation state diagram of the door opening and closing detection device according to the invention

Figure 5 is a cross-sectional view attached to the door opening and closing detection device of a second embodiment according to the present invention

6 is an operational state diagram of the door opening and closing detection device of the second embodiment according to the present invention.

Explanation of symbols on the main parts of the drawings

31: washing machine 33: door

35: top cover 37: push

39: door opening and closing detection device 43a: first piezoelectric element

43b: second piezoelectric element 45: position fixing

47: microprocessor

In order to achieve the above object, the door opening and closing detection device of the automatic washing machine according to the present invention is a door for opening and closing the washing machine inlet, the pressing piece to rotate in accordance with the opening and closing operation of the door, the piezoelectric effect by receiving the pressure by the rotation of the pressing piece. At least one piezoelectric element having a, characterized in that consisting of an output unit for receiving an electrical signal from the piezoelectric element to output a sensing state.

In addition, the door opening and closing detection device of the automatic washing machine according to the second embodiment is installed on the top cover for making the opening of the washing machine, the door opening and closing the opening and the top cover, the door bottom is applied to the piezoelectric effect by receiving power from the power supply A second piezoelectric element having a piezoelectric effect according to an opening / closing operation of the door, the first piezoelectric element having a through hole having a predetermined length penetrating through the upper surface of the top cover; The microprocessor is configured to receive a control signal and detect whether the door is opened or closed.

Hereinafter, a preferred embodiment of the door opening and closing detection device 39 of the automatic washing machine according to the present invention will be described in detail with reference to the accompanying drawings.

First, the piezoelectric effect of the piezoelectric element 43 will be briefly described. When a certain pressure or force such as vibration or sound is applied to the piezoelectric element 43, a voltage is generated on the surface of the piezoelectric element 43. On the contrary, when a certain voltage is applied to the piezoelectric element 43, the piezoelectric element 43 may vibrate depending on the magnitude of the voltage.

In general, a piezoelectric ceramic and a piezoelectric film are used as elements having a piezoelectric effect, and in the present invention, the piezoelectric element 43 may be pressurized to the piezoelectric element 43 by a rotation operation according to opening and closing of the door 33 of the washing machine. In this case, a voltage is generated in direct proportion to the applied pressure.

3 is a cross-sectional view in which the piezoelectric element 43, which is the door opening and closing detection device 39 according to the present invention, is installed, and FIG. 4 is an operation state diagram showing a state in which the door 33 is opened.

As shown in FIG. 3, the top cover 5 having the inlet 11 is fixed to the upper part of the washing machine body, and the door 33 that opens and closes the top cover 5 is rearward with respect to the hinge 33c. The door 33 is divided into the door 33b and the front door 33a so as to be folded within a predetermined angle range.

In addition, the pressing piece 37 which rotates up and down in accordance with the opening and closing operation of the door 33 protrudes integrally with the door 33 on the rear inner bottom surface of the rear door 33b.

The door opening and closing detection device 39, which is a feature of the present invention, is provided with a piezoelectric element 43 directly on or under the pressing piece 37 that rotates according to the opening and closing operation of the door 33. The piezoelectric element 43 ) Means " Supported by the position fixing part 45 in the form of "

That is, the first piezoelectric element 43a and the element attached to the lower inner surface of the element fixing part 45 are attached to the upper inner surface of the position fixing part 45 as the second piezoelectric element 43b. The height interval of the piezoelectric element 43 attached thereto is installed at a position where the piezoelectric element 43 can be contacted at an up and down rotation distance of the pressing piece 37 interlocked according to the opening and closing operation of the door 33.

In addition, the first piezoelectric element 43a is installed to be electrically connected to the microprocessor 49 so as to send a voltage signal generated by the pressure applied by the contact of the pressing piece 37. Is installed to be connected to the "A" (49a) port of the microprocessor 49, the second piezoelectric element (43b) is installed to be connected to the "B" (49b) port of the microprocessor 49 to the piezoelectric element ( 43) to distinguish the positions of the generated voltages.

Referring to the operation of the door opening and closing detection device 39 configured as described above is as follows.

When the washing machine is dewatering, when the door 33 of the washing machine is opened, the door 33 is rotated and opened about the hinge 33c, in which case the pressing piece formed integrally extending on the rear side of the door 33 ( 37 is rotated in the opposite direction to open the door 33 around the hinge 33c.

The push piece 37 rotated downward exerts a pressure on the second piezoelectric element 43b attached to the lower surface of the position fixing part 45, and the second piezoelectric element 43b subjected to the pressure generates a predetermined voltage. Done.

Therefore, the voltage generated at the second piezoelectric element 43b is transmitted to the microprocessor 49 through the port " B " 49b, and the microprocessor 49 inputs the position of the voltage generated piezoelectric element 43. Will receive.

That is, since the microprocessor 49 receives the voltage through the port “B” 49b, it recognizes that the door 33 is open, and controls the motor unit (not shown) of the washing machine 1 to proceed. To pause and display the opening of the door 33 on the display of the microprocessor 49.

On the contrary, when the door 33 is closed, the pressing piece 37 integrally formed on one side of the door 33 is rotated in the opposite direction in which the door 33 is closed, and is rotated upward, and the upper surface inside the position fixing part 45 is closed. Pressure is applied to the first piezoelectric element 43a attached to the first piezoelectric element 43a, so that a predetermined voltage is generated from the first piezoelectric element 43a.

Thus, the generated voltage is transmitted to the microprocessor 49 through an electrically connected " A " 49a port and the microprocessor 49 recognizes that the door 33 is closed and the motor to resume the paused stroke. Control the unit (not shown).

FIG. 5 is a cross-sectional view in which the piezoelectric element 43 which is the door opening and closing detection device 39 according to the second embodiment of the present invention is installed, and FIG. 6 shows a state in which the door 33 according to the second embodiment of the present invention is opened. The operation state diagram is shown.

As shown in FIG. 5, a first piezoelectric element 43a, which is a door opening and closing detection device 39, is attached to an inner bottom surface of the door 33 that opens and closes the top surface of the washing machine 1. The first piezoelectric element 43a is installed to be electrically connected to the power supply 48 for continuous voltage application.

In addition, a through hole 52 having a predetermined circumference and a length penetrating the top cover 5, which makes the inlet 11 of the washing machine, is formed, and a second piezoelectric element is formed at the lower end 52b of the through hole 52. Attach (43b). The through hole 52 penetrating the top cover 5 and the second piezoelectric element 43b is attached to the lower end 52b is not limited in form and the upper end 52a is open.

At this time, the first piezoelectric element 43a attached to the inner bottom surface of the door 33 is attached to a position corresponding to the upper end 52a of the through hole 52 so that the through hole when the door 33 is closed. The upper end 52a of the 52 is blocked.

Referring to the operation of the door opening and closing detection device 39 according to the second embodiment configured as described above are as follows.

Voltage is continuously applied to the first piezoelectric element 43a, and vibration is generated in the first piezoelectric element 43a to which the voltage is applied. When the door 33 is closed, the vibration is transmitted to the second piezoelectric element 43b through the sealed through hole 52, and a voltage is generated in the second piezoelectric element 43b.

Therefore, the voltage signal of the second piezoelectric element 43b is transmitted to the microprocessor 49 and the microprocessor 49 recognizes that the door 33 is closed.

On the contrary, when the door 33 is opened, the first piezoelectric element 43a vibrates due to the voltage applied to the first piezoelectric element 43a, but the first piezoelectric element 43a is separated from the through hole 52. As a result, vibration is not transmitted to the second piezoelectric element 43b attached to the lower end 52b of the through hole 52.

Accordingly, no voltage is generated in the second piezoelectric element 43b, and the microprocessor 49 recognizes that the door 33 is open.

Although specific embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Anyone of ordinary skill in the art will be able to implement various modifications and improvements.

As described above, the door opening and closing detection device of the fully automatic washing machine according to the present invention is less limited in the mechanical installation position and mechanical coupling conditions, the position and space is free when installed, can be used semi-permanently, the quality and reliability of the washing machine There is an effect to improve.

In addition, since the operation is not made of a mechanical switch, the deformation or frictional noise of the door open / close detection device does not occur, thereby improving the performance and function of the washing machine.

Claims (8)

delete delete A door for opening and closing a washing machine inlet, a pressing piece that rotates according to the opening and closing operation of the door, at least one piezoelectric element having a piezoelectric effect under pressure by the pressing of the pressing piece, and receiving an electrical signal from the piezoelectric element to output a sensing state Door opening and closing detection device of the washing machine, characterized in that consisting of an output unit. According to claim 3, wherein the pressing piece is rotated up and down in accordance with the opening and closing operation of the door and the piezoelectric element is a first piezoelectric element, a second piezoelectric element installed on the upper and lower surfaces of the pressing piece in accordance with the rotation of the pressing piece. Door opening and closing detection device for a washing machine, characterized in that for detecting the opening and closing. The door open / close detection device of claim 3, wherein the door open / close detection device further includes a microprocessor which receives an electric signal generated from the piezoelectric element and transmits a control signal. A top cover for making an opening of the washing machine, a door for opening and closing the opening and the top cover, a first piezoelectric element installed on a bottom surface of the door and having a piezoelectric effect by receiving power from a power supply, and having a predetermined length penetrating the top surface of the top cover. A second piezoelectric element having a piezoelectric effect according to an opening / closing operation of the door and a microprocessor which receives an electrical signal from the second piezoelectric element and transmits a control signal according to whether the door is opened or closed. Door opening and closing detection device of the washing machine characterized in that it detects. 7. The door opening / closing detection device according to claim 6, wherein the position at which the first piezoelectric element is attached is a position corresponding to the upper end portion (52a) of the through hole. The door opening and closing detection device of claim 6, wherein a distance between the first piezoelectric element and the second piezoelectric element is less than or equal to a length from an outer upper surface of the top cover to an outer lower surface of the washing machine.