JPS62204794A - Electric washing machine capable of weighing washing article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an electric washing machine that is capable of weighing laundry in order to automatically control the amount and flow of washing water.

<Prior art> In the past, there have been washing machines with additional functions for weighing laundry, such as clothing sensors and load sensors, but in all of them, the laundry is put into the washing machine's washing tub and a certain amount of water is After injecting it, the pulsator was rotated and the amount of laundry was predicted based on the motor's load current and rotational speed data.

In addition, a device that determines the amount of water depending on the amount of laundry and automatically injects water and also automatically adds detergent on top of it has been put into practical use, but since the laundry is already damp when it is added, the detergent was limited to liquids.

<Purpose> The present invention was made in view of the above-mentioned points, and provides a laundry machine that automatically weighs the laundry as it is put into the washing tub and can use even the most common powder or granular detergent. The purpose is to provide equipment.

However, in the present invention, a receiving plate shaped to receive almost all of the laundry put into the washing tub is provided at the bottom of the washing tub, and a central shaft connected to the receiving plate is attached to the washing tub vertically. A weight sensor is provided so as to be movably supported and in contact with the lower end of the center shaft, and an automatic control circuit is provided to calculate the weight of the laundry based on the output signal of the weight sensor and automatically control washing based on the calculated weight. The gist of this invention is an electric washing machine capable of weighing laundry, which is characterized by:

Therefore, in the present invention, by simply putting the laundry into the washing tub and turning on the start switch, detergent is automatically added by the automatic control of the automatic loading mechanism and washing can be started in an optimal manner for the weight of the laundry. .

<Example> Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a block diagram showing the weight sensor and automatic control circuit of an embodiment of the electric washing machine of the present invention, and Fig. 2 is a side view showing the lower half of the electric washing machine in a cutaway state.
The figure is also a vertical cross-sectional view and a cross-sectional view of a part of the pulsator, washing tub driving device S, and weight sensor of the electric washing machine. and,
The electric washing machine of the present invention includes electric washing 1? [An outer tub 2 is internally suspended from the main body 1, and a washing tub (inner tub) 3 which also functions as a dehydration tank is rotatably installed inside the outer tub 2, and the washing tub 3 is poured into the washing tub 3 at the bottom of the washing tub 3. A receiving plate, for example, a pulsator 4 having a stirring function is provided, which is shaped to receive almost all of the washed laundry. A central shaft consisting of a pulsator pongee 5 linked to the pulsator 4 and a sensor rod 6 in contact with the lower end thereof is supported by the washing tub 3 so as to be vertically movable. A weight sensor 7 using a piezoelectric element (or a strain gauge, etc.) is provided so as to be in contact with the bottom of 6 @ 6 a, and the weight sensor 7 is attached to a movable arm 8 and the movable arm 8 and the weight sensor 7 are connected to each other. A weight sensor switching device ij9 is provided to switch and move the weight sensor in the suppression/separation direction (CP-Q arrow direction) with respect to the lower end 6a.

Further, an automatic control device made of a microcomputer is used to calculate the weight of the laundry based on the output signal of the weight sensor 5, and based on the calculated value, automatically controls washing operations such as indicating the Ml weight of the detergent, automatically injecting an appropriate amount, and automatically controlling the amount of washing water and the strength of the washing water flow. It is equipped with circuit C.

The weight sensor 7 is made up of a barium titanate porcelain thin plate and a metal thin plate, and the output electrical signal of the weight sensor 7 is inputted to the amplifier 10 and further to the automatic control circuit C through the lead wire. Also, this automatic control circuit C is connected to start switches and other items) i! The output signals of the tank water level sensor 11, etc. are also input, and these signals are operated.
Based on the output signal of the automatic control circuit C, the detergent amount and water level are displayed to the user on the display unit 12, and the rotation of the motor 13 for washing, rinsing, and spin-drying and the water supply valve 14 for electromagnetic water level control are displayed on the display unit 12. , the opening and closing of the drain valve 15 and the detergent injection valve 16 are controlled. In addition, the switching device rIls of the movable arm 8
Also, control circuit C is activated only immediately after turning on the washing start switch.
is controlled and switched to the pressing force direction (P direction), and the measuring position i? ! By pushing up the sensor rod 6 and the pulsator rod 5 at (7A), the pulsator 4 floats a little, and almost all of the weight of the laundry is applied to the pulsator 4, which is then weighed by the weight sensor 7. After weighing, the weight sensor 7 moves in the direction away from the sensor rod 6 (Q direction) and reaches the standby value rf1 (7B).

The switching device 9 includes, for example, a glaze support plate 18 protruding from a blocking material such as an L-shaped stopper 17 at the start of washing, and a pivot support @1.
A base 8 of a movable arm 8 rotatably supported by a pin 19 at
an actuating means 20 consisting of a solenoid interposed between the ull of the above-mentioned stopper 17 and the base 8 in order to stop the weight sensor 7 at the optimal pressing position, that is, the measuring position 7A.
The positioning piece 21 is fixed to the stopper 17 (or the base 8a) so as to come into contact with a, and the weight sensor 7 is attached to the four parts 23a of the mounting plate 23 fixed to the movable arm 8 with screws 22.
is installed on.

The actuation means 20 includes a case 24 attached to the stopper 17, a solenoid coil and a return spring inside the case 24, and an iron core 2 that is attracted to the solenoid coil when actuated.
5, and the iron core 25 is pivotally attached to the base 8a of the movable arm 8. The sensor rod 6 is vertically slidably and rotatably passed through the drive shaft 26, and its upper end 6b
has a large diameter to prevent it from falling from the center hole of the drive shaft 26. The pulsator glaze 5 is also fitted into the bearing f227 so as to be vertically slidable and rotatable.
It is prevented from coming off by a and bushes 28 and 29.

In addition, the pulsator pongee 5 and the pulsator 4 are vertically slidable so that they can perform a pumping action to send water flow to the lint removal channel, as in the past. The pulsator 4 is secured to the upper end 5b of the pulsator shaft 5 with a screw 30.

Further, a deceleration device 31 is provided that decelerates the power from the drive source from the drive shaft 26 and transmits it to the pulsator shaft 5. A housing 33 is provided for transmitting power to the washing tub 3 via a spring clutch 32, and the reduction gear device 31 includes a sun gear 34 fixed to the drive shaft 26 and a planetary gear that rotates in mesh with the sun gear 34. 35, a gear holding body 36 which is spline-fitted to the pulsator shaft 5 and rotatably holds the planetary gear 35;
The planetary gear 3 is formed on the inner peripheral surface of the housing 33.
5 and a ring gear 37 that meshes with the ring gear 37.

The transmission device that transmits power to the drive shaft 26 includes a motor 38a as a drive source installed at the bottom of the washing machine body, a first pulley 38b, and a second pulley 37c screwed onto the lower end of the drive shaft 26. , transmission bell wrapped around both pulleys) 3
It consists of 8d.

The drive shaft 26 is rotatably fitted and supported in a drive shaft bushing 39, and a cylindrical transmission body 40 is interposed between the drive shaft bushing 39 and the second pulley 38C. The drive shaft 26 is fitted into the hole 41 so as to be rotatable as one unit.

A coil-shaped spring clutch 32 is fitted onto the transmission body 40 and the drive shaft bushing 39, and a ratchet gear 42 is loosely fitted onto the outer periphery of the clutch. A groove in the strip is formed. The lower end of the spring clutch 32 (on the side of the second nib 'J38c) is engaged with the lower end of the groove 36, and the upper end of the spring clutch 32 is fixed to the drive shaft receiving sleeve 39.

The transmission body 26, the spring clutch 32, the ratchet gear 42, and the cross-shaped stopper 17 that engages and separates from the ratchet gear constitute a power transmission means to the housing 33, which transmits the motor in the forward direction. Accordingly, the spring clutch 32 is separated from the outer circumferential surface of the transmitting body 40 and the drive bearing sleeve 39, and is configured to come into pressure contact with the transmitting body 40 and the outer circumferential surface of the drive bearing #i39 when the motor is reversed.

The housing 33 consists of a lower case 33A externally fitted and fixed to the drive bearing #i39, and an upper case 33B externally fitted and fixed to the bearing 027, and both cases 33A, 3
3B is fixed with a bolt. A brake band and a stopper band are attached to the outer peripheral surface of the lower case 33A.

The brake device that controls the rotation of the housing 33 includes:
A solenoid that is turned 0N-OFF by a control device (or timer), the L-shaped stopper 17 that moves left and right due to the 0N-OFF action of the solenoid, and the stopper 17 that is fixed to the stopper and is pressed against and separated from the brake band and stopper band of the housing 33. It is composed of a pressing piece and a spring that urges the stopper 17 toward the brake band.

Next, the control operation of the electric washing machine will be explained. The user of the insect detergent turns on the washing start switch while putting the laundry into the washing tub 3. At this time, the L-shaped stopper 17 is fjS3
The switching device 9 is located at the solid line position in the figure, and the switching device 9
The operating means 20, that is, the solenoid thereof operates to attract the iron core 25, so that the movable arm 8 and the weight sensor 7 are integrally switched from the standby position 7B to the weighing position 7A. Therefore, the weight sensor 7 pushes up the sensor rod 6, so that the upper i6b comes into contact with the lower end 5a of the pulsator shaft, pushing up the pulsator shaft 5 and the pulsator 4, and also pushing up almost all the laundry loaded on the upper side of the pulsator 4 a little. It will be in a state where it is Then, the signal of the weight applied to the weight sensor 7 at that time is inputted to the control circuit C through the amplifier 10, and the net weight of the laundry excluding the weight of the pulsator 4 etc. is measured. Next, by actuation of the switching device 9, the movable arm 8 and the weight sensor 7 are moved in the Q-direction to the standby position 7B.

Then, depending on the weight of the laundry, the optimum amount of detergent for the laundry or the water level is displayed on the display section 12, and the amount of detergent is determined from the water level-detergent amount conversion table. That is, the user measures the detergent and puts it into the automatic dosing container according to the display, or the control circuit C opens the automatic dosing solenoid valve and automatically puts the detergent in the detergent. Next, control circuit C is the best water for laundry! (water level) and compares it with the data from the water level sensor 11 to control the water supply valve and inject water.

In combination with a timer or the like, if the laundry is loaded at night, it is possible to start and complete the laundry at a predetermined time in the morning. That is, it becomes possible to display the appropriate amount of detergent that has been set in advance, automatically inject the appropriate amount, and automatically control the amount of washing water, the strength of the washing water flow, etc.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, in a washing machine that has a stirring protrusion on the washing tub, a disc-shaped receiver may be used, and a weight sensor switching device may not be provided, but the weight sensor may be fixed and placed at the lower end of the central axis. It may be brought into contact directly or indirectly.

<Effects> As is clear from the above description, the present invention is provided with a receiving plate shaped to receive almost all of the laundry put into the washing tub at the bottom of the washing tub, and a receiving plate linked to the receiving plate. The central shaft is supported by the washing tub so as to be able to move up and down, and a weight sensor is provided so as to come into contact with the lower end of the central shaft, and the weight of the laundry is calculated based on the output signal of the weight sensor. The present invention relates to an electric washing machine capable of weighing laundry, characterized in that it is equipped with an automatic control circuit for automatically controlling washing.

According to the present invention, the user can carry out optimal washing according to the weight of the laundry by simply putting the laundry into the washtub and pressing the start switch.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the weight sensor, control circuit, etc. of an embodiment of the electric washing machine of the present invention, Fig. 2 is a side view showing the lower half of the electric washing machine in a cutaway state, and Fig. 3 is the same. (Electric washing machine pulsator, washing tub drive device and m
FIG. 3 is a vertical cross-sectional view of a part of the landscape sensor. 1: 1jFl washing machine body, 2: Outer tub, 3: Washing tub, 4
: Pulsator, 5: Pulsator pongee, 6: Sensor rod, 6a: Lower end, 7: Weight sensor, 8: Movable arm, 9: Switching device, 10: Amplifier, 11: Water level sensor, 12: Display, 13: For dehydration motor, 14: Water supply valve for Mll magnetic water level control 15: Drain valve, 16: Detergent injection valve, C: Automatic control circuit.

Claims (1)

[Claims] A receiving plate shaped to receive almost all of the laundry put into the washing tub is provided at the bottom of the washing tub, and a central shaft linked to the receiving plate is supported by the washing tub so as to be able to move up and down, A weight sensor is provided so as to come into contact with the lower end of the central shaft, and an automatic control circuit is provided that calculates the weight of the laundry based on the output signal of the weight sensor and automatically controls the washing based on the calculated value. An electric washing machine that can weigh laundry.