JPH03141995A - Washing machine - Google Patents

Abstract

PURPOSE:To make vibration of a tank and opening of a cover detectable by providing a sensor which generates an aerial propagation signal to the tank through a part, where a detected part provided in the cover is displaced by opening and closing the cover, and outputs a distance detection signal in accordance with reflection of the aerial propagation signal. CONSTITUTION:A cover 15 is vertically turned with a rear part shaft 15a serving as the center to open and close an opening part 14. In the lower part further behind a part of this shaft 15a, a tongue piece 16, which is a detected part, is protrusively provided, and in a position further in the rear lower part from this tongue piece 16, a sensor 17 is mounted in a casing 1. The sensor 17 generates an ultrasonic wave as an aerial propagation signal, receives its reflection and outputs a distance detection signal in accordance with this reflection. While the tongue piece 16 of the cover 15 is provided so as to be positioned in an advancing route of the ultrasonic wave in a position at the time of opening the cover 15, and also a water receiving tank 5 is provided so that its upper part is positioned in the advancing line of the ultrasonic wave. By this constitution, vibration of the tank 5 is detected by the aerial propagation signal, generated from the sensor 17 and reflected by the tank 5, while opening of the cover 15 is detected by the aerial propagation signal generated from the sensor 17 and reflected by the detected part 16 of the cover.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a washing machine that detects vibrations of a tub and opening of a lid using airborne signals.

(Conventional technology) Traditionally, washing machines, especially washing machines with dehydrating functions,
A water tank that houses a rotating tank that rotates at high speed during dehydration,
It is supported by an elastic support mechanism consisting of multiple hanging persimmons, springs, etc., and due to the wobbling of the rotating tub due to the washing material being unevenly distributed inside the rotating tub, abnormal vibrations may occur, which may be dangerous. Therefore, it has been considered to provide a device that detects this using an airborne signal such as an ultrasonic wave. Furthermore, the opening facing the water tank is equipped with a lid that opens and closes it, and it is dangerous if the rotating tank is rotated with this open, so please do not open this lid. Similarly, it is also considered to provide a detection device using airborne signals such as ultrasonic waves.

(Problem to be Solved by the Invention ff1) However, the above-mentioned devices are each separate, and therefore require various separate parts, resulting in a problem that they are expensive.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to reduce costs by being able to detect vibrations of the tank and opening of the lid using a common device using airborne signals. We are here to provide you with an excellent washing machine.

[Structure of the Invention (Means for Solving the Problems) The washing machine of the present invention is equipped with a tank that vibrates during spin-drying, and a lid that opens and closes an opening facing the tank. a sensor that emits an air propagation signal to the tank through a location where the detected part is displaced by opening and closing the lid, and outputs a distance detection signal in response to the reflection; It is also characterized in that it is equipped with a judgment means for judging the vibration of the tank.

(Function) According to the above means, the vibration of the tank can be detected by the air propagation signal emitted from the sensor and reflected by the cypress, and the opening of the lid can be detected by the air propagation signal emitted from the sensor and reflected by the lid. It can be detected by the airborne signal reflected from the detected part of the sensor.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

First, the outer box 1 of the entire washing machine shown in FIG. - Only the book is shown) is supported by an elastic support mechanism 8 consisting of a hanging rod 6, a spring 7, etc. A rotating tank 9 is accommodated in the water receiving tank 5, and a dewatering shaft 1 projects from the drive mechanism 3 into the water receiving tank 5.
It is attached to o. In this case, a container-shaped agitator 11 is housed in the rotary tank 9, and is attached to a washing shaft 12 that projects from the dewatering shaft 10 of the drive mechanism 3 into the rotation W19.

On the other hand, a top cover 13 is attached to the outer box 1.
The opening 14 facing the water receiving tank 5 is formed as a laundry entrance and exit, and an M2S for opening and closing the opening 14 is pivotally installed. Here, the lid 15 is, in detail, a rear shaft 15.
It opens and closes the opening #14 by rotating up and down about axis a, and a tongue piece 6, which is a detected part, is provided below and further rearward of the shaft 15a. A sensor 17 is installed inside the outer box 1 at a position further rearward and lower than the tongue piece 16. In this case, the sensor 17 is an ultrasonic sensor, which emits ultrasonic waves as an air propagation signal, receives the reflection, and outputs a distance detection signal in accordance with the reflection, as shown by the arrow in FIG. It has become. For such a sensor 17, the tongue piece 16 of the lid 15 is provided so as to be located in the path of the ultrasonic wave at the open position of [15], as shown by the two-dot chain line in the figure. Furthermore, the water receiving tank 5 is also provided so that its upper part is located in the path of the ultrasonic waves.

A control device 18 is incorporated in the front part of the top cover 13. This control device 18 is configured, for example, by a microcomputer and includes the function of a determining means, and as shown in FIG. 2, a distance detection signal is input from the sensor 17 via one detection circuit, and An operation signal is manually inputted from the operation unit 20, and based on the input and a pre-stored program, the energization state of the motor 2 and the clutch for driving the drain valve 4 and the drive mechanism 3 are controlled. The energization state of the driving electromagnet 21 is controlled via the drive circuit 22, and at the same time, the energization state of the display section 23 is directly controlled.

Therefore, the fi15 based on the operation of the control device 18 will be described below.
Detection of opening of water tank 5 and detection of vibration of water tank 5 will be described below.

That is, the ultrasonic waves emitted from the sensor 17 hit obstacles in their path and are reflected, and the sensor 17 receives the reflected ultrasonic waves and outputs a corresponding distance detection signal. As already mentioned, there are

Figure 3 shows when M2S is in the closed state.
In this case, the ultrasonic waves emitted from the sensor 17 hit the water tank 5 and are reflected, and the measurement distance (L
) is A.

On the other hand, Figure i4 shows a state in which the lid 15 is about to open, and in this case, the ultrasonic wave emitted from the sensor 17 changes its path as the M2S starts to open. It is reflected by hitting the end of the tongue piece 16 hanging inside, and the measured distance (L) due to the reflection is B (B<A).

FIG. 5 shows the case when the lid 5 is in the open and fully closed state. In this case, the ultrasonic waves emitted from the sensor 17 move along the path of the ultrasonic waves as the lid 15 finishes opening. It hits the middle part of the tongue piece 16 located at , and is reflected, and the distance (L) measured by the reflection is C (A>C>B).

As a result, when the -p1 constant distance B-C from when the lid 15 is about to be opened to when it is completely opened is detected (
B≦LSC), the control device 18 that receives the detection signal determines that lli5 is in an open state, as shown in FIG.
Activate the brake system.

On the other hand, when the lid 15 is closed and the motor 2 is energized to rotate the rotating tank 9, the ultrasonic waves emitted from the sensor 17 hit the water receiver TF15 and reflect as described above. The measured distance # (L) by reflection is the above-mentioned A when stopped, but the water receiving tank 5 vibrates due to the rotating tub 9 wobbling due to the laundry being shifted inside the cypress. , it becomes more than A or less than A, especially the 6th
A of 10g or more or A-1 or less (but larger than C) as shown in the diagram
When (LyoA+475A-1kL>C),
As shown in FIG. 7, the control device 18 determines that the water receiving tank 5 has vibrated abnormally, and on the basis of this, for example, cuts off the power to the motor 2, operates a brake device, and further corrects the misalignment of the laundry. This leads to the action of

In this state, if the distance (L) measured by the sensor 17 is smaller than A+jl or larger than A-jl (A+l
)>L>A-1), the control device 18 determines that it is normal and continues the dewatering operation.

[Effects of the Invention] As is clear from the above description, according to the washing machine of the present invention, the vibration of the tub can be detected by the air propagation signal emitted from the sensor and reflected by the cypress wood. In addition, the opening of the lid can be detected using an airborne signal emitted from the same sensor and reflected by the detected part of the lid.In short, a common device that uses airborne signals to detect the vibration of the tank and the opening of the lid can be used. Detection can be achieved by the following method, and the excellent effect of reducing costs can be obtained.

4 Brief Explanation of the Drawings The drawings show one embodiment of the present invention; Fig. 1 is an overall vertical sectional side view, Fig. 2 is a schematic electrical configuration diagram, and Fig. 3 is a lid closing diagram of the main part. Fig. 4 is a schematic longitudinal side view of the same part when the lid is opened, Fig. 5 is a schematic longitudinal side view of the same part with the lid open, and Fig. 6 is a schematic longitudinal side view of the same part when the lid is opened. FIG. 7, which is a schematic vertical side view during dehydration operation, is a diagram showing the relationship between the measured distance and the judgment result.

In the drawing, 5 is a water tank (cypress), 14 is an opening, 15 is a lid,
Reference numeral 16 indicates a tongue piece (detected portion), 17 indicates a sensor, and 18 indicates a control device (one means for determining).

Claims (1)

[Claims] 1.Equipped with a tank that vibrates during dehydration, and a lid that opens and closes the opening facing the tank, and an air-propagated signal is transmitted to the tank through a part to be detected on the lid that is displaced by opening and closing of the lid. A washing machine characterized by comprising a sensor that emits a distance detection signal and outputs a distance detection signal according to its reflection, and a judgment means that receives the output from the sensor and judges whether the lid is opened or the tank vibrates. Machine.