JPH0761395B2 - Washing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a washing machine,
In detail, a device that automatically opens and closes the washing machine door by operating a one-touch switch, and controls the device to automatically close the opened door, and if the door does not close, stop the dehydration operation and rotate the dehydration tub at high speed. The present invention relates to a washing machine capable of preventing an accident due to the accident.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 6, a door of a washing machine has front and rear door members 1 and 1'joined by a hinge 4 so as to be mutually foldable, and a rear door member 1 '. The rear end portion is hinged to a predetermined portion of the washing machine body and is rotatable. At the lower end of the rear end of the rear door member 1 ', a contact piece 2 of a switch 2 fixedly installed in the washing machine body.
Since the operating piece 3 for turning on / off the switch 2 by operating a is fixed, when the door is opened, the operating piece 3 is disengaged from the contact piece of the switch 2 so that the switch 2 is kept in the on state. When opened, the operating piece 3 is the contact piece 2a of the switch 2.
The push-up switch 2 keeps the open state.

[0003]

However, in such a conventional washing machine, there is an inconvenience that the user has to manually open or close the door in order to wash the laundry, especially the door. If the washing machine dehydration operation is performed with the door open, there is a problem that an accident occurs due to the high speed rotation of the dehydration tub.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to improve safety by controlling the opening / closing operation of the door so that the washing machine is dehydrated only when the door is closed. It is an object of the present invention to provide a washing machine having a door opening / closing device of a machine.

An object of the present invention is to fix a flexible rack to a sliding door so that linear and curved movements are possible, a gear driven by a motor meshes with the rack, and to detect opening and closing of the door. This is achieved by the control means outputting a drive direction control signal to control the drive of the motor depending on whether the motor is applied or not.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention thus constructed will be described in detail below with reference to the accompanying drawings. As shown in FIGS. 1 to 3, the automatic opening / closing door of the present invention is installed on a top cover 12 which is formed in a slidable manner so as to be bent and fixed to an upper part of a washing machine, and a handle cap is provided at a front end of an upper surface thereof. A door 11 on which a door 13 is formed, and a door guide roller 20 fixed by a shaft 19 on both lower surfaces of the door 11.
A guide rail 14 having a guide groove 15 into which the door guide roller 20 is inserted horizontally and fixed to both upper portions of the washing machine, and a rack fixed to the center of the lower surface of the door 11 for moving the door 11 horizontally. 16, a gear 18 that is engaged with the rack and driven by a motor 17, a housing 21 installed inside the washing machine and below the door 11 to protect the motor 17 and the gear 18, and a tip portion of the housing 21. Installed on the lower end of the door 11 and driven by an opening actuating piece 23 fixed to the lower end of the door 11, and a rear end of the door 11 installed on the rear end of the housing 21. The door closing detection switch 25 driven by the closing operation piece 26 fixed to the door 11 is installed on the portion where the door 11 is bent downward from the horizontal movement. A plurality of guide rollers 27 for smooth movement and separation preventing door 11 is to that consist. In the drawings, reference numeral 24 is a support base, 28 is a washing and dehydrating tub, and 29 is an outer tub.

The door 1 according to the present invention constructed as described above
According to the automatic opening / closing device of No. 1, the rotary motion of the gear 18 driven by the motor 17 is converted into a linear reciprocating motion by the rack 16. Therefore, when the door 11 moves backward through the guide roller 27 and the support base 24, the door 11 is opened, and the rotation of the motor 17 is reversed.
It closes when 1 moves in the opposite direction.

Such an operation is controlled by the apparatus shown in FIG. 4, and the control operation is performed as shown in the flow chart of FIG. The operation of the present invention will be described with reference to this drawing. The control device of the present invention includes a door opening / closing detection unit 101 that outputs a door opening / closing signal and a door opening / closing detection signal, and a key input unit 104 that outputs a signal according to a user's function selection such as washing, rinsing, and dehydration. A microcomputer 100 that controls the drive of the motor 17 and the overall control device according to the output signals of the door open / close detection unit 101 and the key input unit 104;
A motor drive unit 102 for driving the motor 17 in one direction according to a motor drive control signal of the microcomputer 100, a display unit 103 for displaying the function and state of the washing machine, and a load drive for driving the dehydration / wash tub. The part 105 and the microcomputer 10
Oscillator 108 for applying a clock pulse at 0
And a power supply unit 109 for supplying static voltage to the device.
A reset unit 106, an interrupt unit 110, and a buzzer 10 for notifying a malfunction of the washing machine and the end of operation.
The motor drive control signal of the microcomputer 100 is a driver 102a.
Thyristor TA for clockwise drive according to the direction of rotation through
1 or the counterclockwise drive thyristor TA2 is operated to control the opening and closing of the door 11. The rotation direction of the motor 17 and the movement direction of the door 11 are shown in FIG.

When power is not applied to the washing machine, the door 11
Is opened and closed manually. When the power switch SW1 is short-circuited and powered on, the AC power AC is supplied to the microcomputer 1 through the transformer T1 and the power supply unit 109 at a static voltage.
00 to drive the control device. At this time, the door 11 of the washing machine is closed, and when the user pushes the door opening / closing switch SW2 once to open the door 11 in order to put the laundry in the washing machine, one high potential pulse is input to the microcomputer 100. It is input to the port PX. The microcomputer 100 recognizes the door opening with the high potential signal and outputs the low potential signal and the high potential signal to the output ports PC and PD, respectively.

A high-potential signal at the output port PD is applied to the gate of the counterclockwise driving thyristor TA2 through the driver 102a, and accordingly the AC power supply AC is supplied to the motor 17 through the thyristor TA2.
Will rotate counterclockwise. Accordingly, the gear 18 also rotates counterclockwise, and its rotational movement is changed to the linear reciprocating movement of the door 11 through the rack 16 so that the door 11 moves below the inside of the washing machine along the support table 24. At this time, the door 11
The door guide roller 20 attached thereto moves along the guide groove 15 of the guide rail 14 and prevents the guide roller 27 from being detached when the door 11 moves downward, so that the door guide roller 27 can be opened smoothly.

When the door 11 is completely opened, the door opening detection switch 22 is short-circuited by the opening operation piece 23 and a high potential signal is input to the input port PA of the microcomputer 100.
00 outputs a low potential signal to the output ports PC and PD to stop the driving of the motor 17 to complete the door opening operation.

On the contrary, when the door 11 opened after the laundry is put in is to be closed, the door opening / closing switch SW
Press 2 again. That is, the door opening / closing operation changes each time the door opening / closing switch SW2 is pressed. Therefore, one high potential pulse is input to the input port PX of the microcomputer 100, and accordingly, the microcomputer 1
00 outputs high potential and low potential signals to the output ports PC and PD for closing the door 11.

The high potential signal of the output port PC is applied to the gate of the clockwise driving thyristor TA1 through the driver 102a, and the AC power supply AC is supplied to the motor 17 through the thyristor TA1. Therefore, the motor 17 rotates clockwise and the gear 18 also rotates clockwise. Gear 1
The rotary motion of 8 is converted into a linear reciprocating motion of the door 11 through the rack 16 and the door 11 is moved to the right and closed.

When the door 11 is completely closed, the door closing detection switch 25 is short-circuited by the closing operation piece 26 fixed to the rear end of the door 11 and the microcomputer 100 is closed.
A high potential signal is input to the input port PB of the. Therefore,
The microcomputer 100 recognizes that the door 11 is closed and outputs a low potential signal to the output ports PC and PD. Therefore, the driving of the motor 17 is stopped and the door closing operation is completed.

On the other hand, when the dehydrating function is selected, the dehydrating operation should be performed with the washing machine door 11 closed, so that the microcomputer 100 checks the open / closed state of the door 11. At this time, if the door 11 is opened and the door closing detection switch 25 is opened, the microcomputer 100 recognizes this and once makes the dehydration operation stand by, and rotates the motor 17 clockwise for a predetermined time. Therefore, the output port PC outputs a high potential signal to the motor drive unit 102.

When the door 11 is closed in this way, the dehydration operation is performed. However, if it is not closed within a predetermined time, the microcomputer 100 recognizes that a device failure or malfunction has occurred and displays an error occurrence message to prevent the dehydration operation. When the dehydration function is selected, if the door 11 is closed, that is, the door closing detection switch 25 is short-circuited, the dehydration operation is immediately performed.

[0017]

As described above, according to the present invention, the door is manually opened and closed when no power is applied to the washing machine, and the door is opened and closed by simply operating the switch when power is applied. However, there is an effect that the dehydration operation can be made possible only for the case where the door is closed or the door is closed for convenience of the user, and a safety accident at the time of dehydration can be prevented beforehand.

[Brief description of drawings]

FIG. 1 is a perspective view of a door and a top cover of a washing machine according to the present invention.

FIG. 2 is a perspective view showing a configuration of an automatic opening / closing door and a driving device of a washing machine according to the present invention.

FIG. 3 is a schematic front view of a door portion provided in the washing machine of the present invention.

FIG. 4 is a circuit diagram of an automatic door opening / closing device provided in the washing machine of the present invention.

FIG. 5 is a control flow chart of an automatic door opening / closing device provided in the washing machine of the present invention.

FIG. 6 is a state diagram showing a door open / closed state when the door of the general washing machine is closed (A) or opened (B).

[Explanation of symbols]

 11 Door 12 Top Cover 13 Handle Cap 14 Guide Rail 15 Guide Groove 16 Rack 17 Motor 18 Gear 19 Shaft 20 Door Guide Roller 21 Housing 22 Door Open Detection Switch 25 Door Close Detection Switch

Claims (1)

[Claims] 1. A washing machine door, a door driving means for sliding the washing machine door to open and close the door, a door opening detection signal indicating that the washing machine door is open, and the washing machine door. A door opening / closing detection means for outputting a door closing detection signal indicating that the door is closed, a control means for outputting a driving direction control signal to the door driving means, and a dehydrating device for performing a dehydrating function, Dehydration function selection instruction means for selectively outputting an instruction signal for performing a dehydration function, and the dehydration device when receiving the instruction signal from the dehydration function selection instruction means and the door closing detection signal from the door opening / closing detection means A dehydration start command means for starting a dehydration operation, and a door opening detection signal from the door opening / closing detection means when receiving the instruction signal from the dehydration function selection instruction means. And a door closing command means for causing the control means to output a control signal for closing the door to the door driving means so that the door driving means closes the washing machine door. A washing machine characterized by that.