JPH0665359B2 - Abnormal vibration detection device for washing machine combined with dehydration - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure in which abnormal vibration of a tank is detected by a detection lever that is swung by the tank and an operating device such as a switch that is pressed by the detection lever. For things,
The present invention relates to an abnormal vibration detection device for a washing machine with combined dehydration, which has an improved detection lever.

[Technical background of the invention]

Conventionally, in this type of washing machine for combined use of dehydration, a detection lever is provided at the upper part of the machine so as to be swingable, and, for example, a tub that is rotated at a high speed during dewatering is caused by an unbalanced load due to a deviation of the laundry. As a result, when an abnormally large vibration is caused, the detection lever is struck to swing it, and the swing operation pushes a switch or the like to actuate the switch or the like to rotate the tank, for example. There are some that have been stopped so that safety is ensured.

[Problems of background technology]

However, in the case of the above-mentioned conventional one, it is sufficient if the vibration of the tank stays within the expected range, but if it is larger than that,
The detection lever has a problem that the switch or the like is damaged by applying a strong pressing operation to the switch or the like, and the detection lever itself is also damaged.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and therefore, the object thereof is to prevent damage to an operating device such as a switch and damage to a detection lever due to vibration larger than expected of a tank and to prevent damage to a detection lever in a long and good state. An object is to provide a device for detecting abnormal vibrations of a washing machine that can be used both for dehydration and for use.

[Outline of Invention]

According to the present invention, an elastically deformable portion that can be elastically deformed in the swinging direction of the detection lever is provided between the operating device operating side portion and the tank contacting side portion of the detection lever, thereby making the tank larger than expected. When the vibration is encountered, the detection lever is elastically deformed and escapes from the elastic deformation portion.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. First, in FIG. 1, 1 is an outer box of the entire washing machine for dehydration and 2 is an upper surface thereof. With the upper plate provided,
An operation panel section 3 is formed on the front portion of the upper plate 2, and on the other hand,
A flat box part 4 is formed in the rear part, and a laundry entrance / exit 5 is formed in an intermediate part between them, and a lid 6 for opening / closing the entrance / exit 5 is pivotally installed. Next, referring to FIG. 2, 7 is an outer tank disposed inside the outer box 1, 8 is an inner tank further disposed inside the outer tank 7, and the inner tank 8 has an upper end opening edge portion. For example, a liquid-filled balance ring 9 is attached, while a cover ring 10 is attached to the upper opening edge of the outer tank 7. Reference numeral 11 designates a shield plate which covers the open lower surface of the flat box portion 4 of the upper plate 2, which has a hole 13 formed in the raised portion 12 and a supporting piece from the peripheral portion of the hole 13. 14 protruding, this support piece
The shaft portion 16 of the detection lever 15 which is passed through the hole 13 is supported by the hole 14, and the detection lever 15 is provided so as to be able to swing outward and inward around the shaft portion 16. Now, in detail, the detection lever 15 has an inverted L-shaped upper lever 15a made of plastic, for example, and a straight lower lever 15b made of metal, for example, as shown in FIGS. These two members are joined together by a shaft portion 17 projecting laterally at the lower end of the upper lever 15a and a hole portion 18 also laterally drilled at the upper end of the lower lever 15b. It is connected so that it can rotate in the swinging direction (outward / inward). Reference numeral 19 denotes a spring piece extending from the upper lever 15a, which has a dogleg shape, and the top portion of which elastically presses the lower lever 15b from the outside so that the spring lever acts as an elastically deformable portion along with the upper lever 15a. Makes up 20. still,
The shaft portion 16 is projectingly provided on the upper lever 15a, and the upper lever 15a is provided with a spring seat portion 21 projecting in the middle of the tip end thereof, and the protruding portion 12 of the shielding plate 11. A compression coil spring 23 is interposed between the spring seat protrusion 22 and the spring seat protrusion 22. The detection lever 15 as a whole is held such that the lower lever 15b thereof faces the outer tub 7. In addition to the above, 24 is a switch as an actuating device arranged near the detection lever 15 as shown in FIG. 5, and more specifically, a fixed contact piece as shown in FIG.
The switch base 28 in which the base of 25, the base of the first movable contact piece 26 arranged above it, and the base of the second movable contact piece 27 arranged below is embedded insulatively is provided with the switch base 28. 12
In particular, the tip of the first movable contact piece 26 is the detection lever.
The second movable contact piece 2
A projecting piece 29 in which the tip part of 7 projects rearward from the base part of the lid 6
When the lid 6 is closed, the second movable contact piece 27 is pushed up by the projecting piece 29 and comes into contact with the fixed contact piece 25 to serve as a lid switch. Is in a state. On the other hand, the first movable contact piece 26 is separated from the fixed contact piece 25 and is in an off state as an abnormal vibration detection switch.

Next, the operation of the above-described structure will be described. First, during normal operation, there is no difference from the above description, and the first movable contact piece 26 of the switch 24.
Is separated from the fixed contact piece 25 and continues to be in an off state as an abnormal vibration detection switch. On the other hand, for example, in the dehydration operation, when the inner tub 8 that is rotated causes abnormal vibration due to an unbalanced load due to a deviation of the laundry, the outer tub 7 also abnormally vibrates similarly. Is the lower lever 15 of the detection lever 15.
Upon hitting b, the hitting lower lever 15b at this time moves the upper lever 15a integrally via the spring piece 19, so that the detection lever 15 as a whole swings around the shaft portion 16 against the elastic force of the spring 23. The first movable contact piece 26 of the switch 24 is pushed down by the tip of the upper lever 15a. Therefore the first movable contact piece
The reference numeral 26 indicates the ON state as the abnormal vibration detection switch, which is in contact with the fixed contact piece 25 as shown by the chain double-dashed line in FIG.
Based on this, for example, the dehydration operation is stopped, that is, the rotation of the inner tank 8 is stopped. In contrast to the above, when the abnormal vibration of the inner tank 8 and the outer tank 7 is larger than expected, the detection lever 15 which is swung by the outer tank 7 is shown in FIG. As shown in, the upper lever 15a is stopped by the stopper portion 30 provided in the peripheral portion of the hole 13 of the shield plate 11, and thereafter the lower lever 15a is
Only 15b rotates while elastically deforming the spring piece 19, in other words, the force received from the outer tub 7 is released by the slashing rotation of the lower lever 15b, and the force is applied to the switch 24.
Therefore, the switch 24 can be prevented from being damaged and the detection lever 15 itself can be prevented from being damaged.

In addition to the above, particularly in the above embodiment in which the detection lever 15 is composed of two members, an upper lever 15a and a lower lever 15b, for example, the lower lever 15b is connected to the upper lever 15a by connecting the outer case 1 of the upper plate 2 By doing so immediately before attachment to the upper plate 2, the protrusion from the upper plate 2 before that can be eliminated, and thus the storage and storage properties of the upper plate 2 can be improved, and
Although the detection lever 15 itself can be prevented from being deformed or damaged, the detection lever 15 is not limited to this. Therefore, the detection lever 15 is integrally formed, for example, by plastic as shown in FIG. However, the detection lever 32 may be replaced with a detection lever 32 in which a bent portion 31 as an elastically deformable portion is formed in an intermediate portion thereof.
When the vibration of the outer tub 7 that is larger than expected is encountered, the bending portion 31 as the elastic deformation portion elastically deforms as shown by the chain double-dashed line in the figure, so that the same effect as described above can be obtained. The manufacturability of the lever itself can be improved.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings. In particular, a stopper for regulating the swing amount of the upper portion of the detection lever is formed by further providing the spring seat protrusion 22 with a protrusion. Alternatively, the switch base 28 may be formed by providing a protrusion, and the present invention can be implemented by appropriately changing it within a range not departing from the gist.

〔The invention's effect〕

As is apparent from the above, the present invention is an abnormal vibration detection device for a combined dehydration washing machine for detecting abnormal vibration of a tub rotated in a combined dehydration washing machine, which is pressed by the abnormally vibrating tub. The detection lever includes an oscillating detection lever and an operation device such as a switch that is operated by a pressing operation applied by the detection lever. The detection lever is provided between the operation device operation side portion and the tank contact side portion of the detection lever. It is characterized by providing an elastically deformable portion that can be elastically deformed in the swinging direction, whereby the detection lever elastically deforms and escapes from the elastically deformable portion when a vibration larger than expected by the tank is encountered. Therefore, it is possible to prevent breakage of the actuating device such as the switch and breakage of the detection lever, and it is possible to use the switch in a good condition for a long time.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is an external perspective view of a washing machine for combined use of dehydration, and FIG. 2 is II-II of FIG.
An enlarged vertical side view of the main part along the line, FIG. 3 is an enlarged cutaway side view of the detection lever alone, FIG. 4 is the same rear view, FIG. 5 is a plan view of the main part, and FIG. 6 is a side view of the switch part. Is a figure,
And FIG. 7 is a side view showing a different example of the detection lever. In the figure, 1 is an outer box, 2 is an upper plate, 7 is an outer tank, 8 is an inner tank, 15 is a detection lever, 15a is an upper lever (on the operating side of the detection lever operating device), and 15b is a lower lever (of the detection lever). Tank contact side), 19
Is a spring piece, 20 is a spring acting portion (elastically deformable portion), 24 is a switch (actuating device), 31 is a bent portion (elastically deformable portion), and 32 is a detection lever.

Claims (3)

[Claims] 1. A detection lever for detecting an abnormal vibration of a tub that is present in a dehydrating and washing machine and rotated, and a detection lever that is pressed and oscillated by the abnormal vibration tub and a pressing operation by the detection lever. And an actuating device such as a switch that is actuated by the addition of an actuating device, and an elastic deformable portion that can be elastically deformed in the swinging direction of the detecting lever is provided between the actuating device operating side and the tank abutting side part of the detecting lever. An abnormal vibration detection device for a combined washing machine for dehydration. 2. The washing machine for dehydration combined use according to claim 1, wherein the detection lever is formed by connecting two members, and the connecting portion has a spring acting portion as an elastically deforming portion. Abnormal vibration detection device. 3. An abnormal vibration detecting device for a washing machine with combined dehydration as set forth in claim 1, wherein the detection lever is integrated as a whole, and a bent portion as an elastically deformable portion is present in an intermediate portion thereof. .