JP2532624Y2 - Dehydration washing machine safety switch device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety switch device for detecting an abnormal vibration of a washing and dewatering tub and controlling a dehydrating operation and the like.

[0002]

2. Description of the Related Art In a single-tub washing machine, for example, during a spin-drying operation, the spin-drying tub rotates at a high speed in one direction and blows off moisture contained in the laundry put therein by centrifugal force. If the laundry is deviated in the washing and dewatering tub during this spin-drying operation, the washing and dewatering tub is largely shaken due to the eccentric load, and abnormal vibration occurs. Therefore, a safety switch device is incorporated in a washing machine to detect the occurrence of such abnormal vibration and stop the rotation of the washing and dewatering tub.

As a conventional example of this safety switch device, there is, for example, Japanese Utility Model Laid-Open No. 59-155085, which is disclosed in FIGS.
As shown in FIG. 2, a microswitch 1 connected to a control device (not shown) using a microcomputer or the like for controlling the rotation of the washing and dewatering tub 7 is mounted on the base 5, and the contacts of the microswitch 1 are opened and closed. The safety lever 9 is attached to the base 5 via a compression spring 6 and the lower end of the safety lever 9 faces the vicinity of the washing and spin-drying tub 7. The contact part 9a is formed in an L-shape in which the lower part is bent downward at a right angle, and the contact part 9b to the washing and dewatering tub 7 integrally formed with the contact part 9a is also formed so that the lower part is downward at a right angle from the upper horizontal part. It is formed in a bent L-shape, and the horizontal portion of the contact portion 9a of the microswitch 1 to the contact point is normally pressed by the compression spring 6 toward the contact side from below.

In normal operation, the contact portion 9a of the safety lever 9 against the contact point presses the contact point by the elastic force of the compression spring 6,
Contacts are closed. Therefore, when the dehydrating motor of the washing and dewatering tub 7 is energized and rotated during the dehydrating operation, the washing and dewatering tub 7 rotates in one direction at a high speed. However, if the laundry in the washing and dewatering tub 7 is offset and an eccentric load is generated during the dehydrating operation, the washing and dewatering tub 7 greatly abnormally vibrates,
The contact portion 9b of the safety lever 9 to the washing and dewatering tub 7 is pushed to the position shown by the chain line in FIG. As a result, the safety lever 9 rotates around the root of the contact portion 9a for the upper microswitch 1 as a fulcrum, and the contact portion 9a is separated from the contact. As a result, the contact is opened, the dehydrating motor is stopped by the operation of the control device, and the rotation of the washing and dewatering tub 7 is stopped.

[0005]

During the spin-drying operation, the laundry in the washing and dewatering tub 7 may jump out of the tub due to centrifugal force. As a result, a force in the direction of rotation of the washing and dewatering tub 7 is applied to the safety lever 9, which may be deformed by being twisted or bent, which may hinder the subsequent switch operation.

An object of the present invention is to eliminate the disadvantages of the prior art, and to prevent the laundry that has jumped out of the washing and spin-drying tub during the spin-drying operation from being entangled with the safety lever and to exert a force in the rotating direction of the washing and spin-drying tub on the safety lever. It is an object of the present invention to provide a safety switch device of a dehydrating washing machine that can prevent the safety lever from being deformed even when the pressure is applied and can ensure correct and reliable operation of the switch.

[0007]

In order to achieve the above object, the present invention provides a switch for stopping the rotation of the washing and dewatering tub in the event of an abnormality, and one end of a safety lever for opening and closing the contact of the switch. In the dehydrating washing machine facing the, the safety lever is constituted by a switch contact piece and a tub contact piece,
The gist of the invention is that the tub contact piece is rotatably attached to the switch contact piece in the rotating direction of the washing and dewatering tub.

[0008]

According to the present invention, when the washing and dewatering tub presses the tub abutting piece of the safety lever in the radial direction of the tub during the spinning operation and the washing and dewatering tub abnormally vibrates, the tub abutting piece moves. Is transmitted to the contact piece of the switch, the contact piece of the switch is separated from the switch contact, the contact is opened, and the rotation of the washing and dewatering tub is stopped. On the other hand, when the laundry comes out of the washing and dewatering tub and is entangled with the tub abutting piece of the safety lever, and the force in the rotating direction of the washing and dewatering tub is applied to the tub abutting piece, only the tub abutment piece is removed. It rotates in the direction of rotation of the tank via the joint with the switch contact piece. This allows the force in the rotating direction of the washing and dewatering tub applied to the safety lever to escape outside at the tub contact piece.
Since it is not transmitted to the switch contact piece, the safety lever is not deformed and the switch does not malfunction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing a first embodiment of the safety switch device of the dehydration washing machine of the present invention, and FIG. 2 is a front view showing the first embodiment of the safety switch device of the dehydration washing machine of the present invention. The same components as those of the conventional example described with reference to FIGS. 6 and 7 are denoted by the same reference numerals. The basic structure of the safety switch device of the present invention is the same as that of the prior art. The upper part of the safety lever 8 is made to freely engage and disengage with the contact located at a position via a compression spring 6 attached to the base 5.

The safety lever 8 is formed in an L-shape composed of a horizontal portion and a vertical portion connected thereto, and a switch contact piece 2 for contacting the contact point of the micro switch 1 and a side near the washing and dewatering tub 7. And a strip-like tub contact piece 3 to the washing and dewatering tub 7 located on the upper side of the switch contact piece 2 with the upper front side of the tub contact piece 3 superimposed on the lower back side of the switch contact piece 2. The connecting member 4 was rotatably connected to the washing / dewatering tub 7 in the rotating direction.

As a result, the horizontal portion of the switch contact piece 2 above the safety lever 8 closes the contact while being pressed from below by the compression spring 6 toward the contact of the microswitch 1.
The lower tank abutment piece 3 hangs vertically and is suspended parallel to the side of the washing and dewatering tub 7.

Next, the operation will be described. Under normal conditions, the switch contact piece 2 of the safety lever 8 is actuated by the elasticity of the compression spring 6.
Pushes the contact of the microswitch 1 from below, and the contact is closed. Therefore, when electricity is supplied to the spin-drying motor of the washing and spin-drying tub 7 during the spin-drying operation, this spins, and the spin-drying tub 7 rotates in one direction at high speed. However, if the laundry in the washing and dewatering tub 7 is offset during the dehydrating operation and an eccentric load is generated, the washing and dewatering tub 7 greatly abnormally vibrates, and the safety lever 8
Is pressed in the direction of the arrow in FIG. As a result, the tank contact piece 3 is pushed and moved to the position shown by the dashed line in FIG. 1, and the switch contact piece 2 coupled to the upper portion of the tank contact piece 3 via the coupling member 4 also moves. The washing and dewatering tub 7 is pushed in the same direction as the piece 3, and is set at a point of attachment to the base 5 as a fulcrum.
, And pivots downward against the elasticity of the compression spring 6 to separate from the contact. As a result, the contact is opened, the power supply to the spin-drying motor is cut off, and the washing and spin-drying tub 7 is stopped.

By the way, during the spin-drying operation, the washing and spin-drying tub 7
The laundry inside jumps out of the tub by centrifugal force and the safety lever 8
Of the washing and dewatering tub 7 is applied to the tub contacting piece 3. In this case, the tub abutment piece 3 is rotatably connected to the switch abutment piece 2 in the tub rotation direction by the connecting member 4 so that the tub abutment piece 3 is washed by the protruding laundry. Upon receiving the force in the rotating direction of the dewatering tub 7, it rotates in the same direction as the rotating direction about the connecting point as an axis. Without being transmitted, the switch contact piece 2 maintains the normal position. In this way, the force in the tank rotation direction applied to the safety lever 8 is released by rotating only the tank contact piece 3 in the same direction, and is not transmitted to the switch contact piece 2.

The means for connecting the switch contact piece 2 and the tank contact piece 3 of the safety lever 8 is not limited to the first embodiment, but as a second embodiment, as shown in FIGS. The lower part of the switch contact piece 2 is further bent into an L shape to form an upward bent piece 2a, while the upper part of the tank contact piece 3 is horizontally bent to form a joint piece 3a. The connecting member 4 may be rotatably inserted into the lower portion of the switch contact piece 2 and the hole formed in the bent piece 2a to stop the tip of the connecting piece 3a on the bent piece 2a.

As a third embodiment, as shown in FIG. 5, only the upper part of the tank abutment piece 3 is slightly curved, and the upper part of the tank abutment piece 3 is bent in a hole formed in the lower part of the switch abutment piece 2. The upper curved portion 3b is inserted by rotatably inserting the portion 3b from the front surface.
Can be fixed to the switch contact piece 2 by the connecting member 4.

[0016]

[Effects of the Invention] As described above, the safety switch of the dehydrating washing machine of the present invention is mounted on the safety lever by the washing lever and the washing lever which is ejected from the washing and dehydrating tub during the spinning operation. Even if force in the direction of rotation is applied, this force can be released at the lower part of the safety lever, and it will not be transmitted to the contact part with the upper micro switch, so the safety lever will be twisted or bent Deformation can be prevented, and there is no possibility that the switch will malfunction due to the deformation.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a safety switch device of a dehydrating washing machine according to the present invention.
It is a side view which shows an Example.

FIG. 2 shows a first embodiment of the safety switch device of the dehydration washing machine according to the present invention.
It is a front view showing an example.

FIG. 3 shows a second embodiment of the safety switch device of the dehydration washing machine according to the present invention.
It is a side view which shows an Example.

FIG. 4 shows a second embodiment of the safety switch device of the dehydrating washing machine of the present invention.
It is a front view showing an example.

FIG. 5 shows a third embodiment of the safety switch device of the dehydration washing machine according to the present invention.
It is a side view which shows an Example.

FIG. 6 is a side view showing a conventional example of a safety switch device of a dehydrating washing machine.

FIG. 7 is a front view showing a conventional example of mounting a safety switch on a dehydrating washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Micro switch 2 ... Switch contact piece 2a ... Bending part 3 ... Tank contact piece 3a ... Coupling piece 3b ... Upper curved part 4 ... Coupling member 5 ... Base 6 ... Compression spring 7 ... Washing and dewatering tank 8 ... Safety lever 9 ... Safety lever

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Minoru Sonoda 1-1-1 Yamate, Funabashi-shi, Chiba Japan Inside Funabashi Works, Kentucky Iron & Steel Co., Ltd. (72) Inventor Yumiko Kauchi 1-1-1 Yamate, Funabashi-shi, Chiba No. 1 Inside the Funabashi Works of Nippon Construction Steel Co., Ltd. (56) Reference Japanese Unexamined Patent Publication No. Sho 61-5584 (JP, A) Showa 57-45874 (JP, U) Actually open Showa 49-89970 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A dehydration washing machine in which a switch for stopping rotation of a washing and dewatering tub is provided when an abnormality occurs and one end of a safety lever for opening and closing a contact of the switch faces the washing and dehydrating tub. A safety switch for a dehydrating washing machine, comprising a contact piece and a tub contact piece, wherein the tub contact piece is rotatably attached to the switch contact piece in the direction of rotation of the washing and dewatering tub. apparatus.