JPH0663287A - Switch device for washing machine - Google Patents

Abstract

PURPOSE:To provide a switch device for washing machine, the detecting speed of which for lid opening detection is improved, and which does not generate a gap between a lid and main body when a washing/spin-drying vessel is rotating. CONSTITUTION:A lid opening/closing detecting lever 15-1 of a safety switch 15 is brought into contact with an approximately plate-shaped lid guide 16-2 which arranged on a lid 16, which is fastened to an upper part of a main body 13 by a shaft 16-1, at a relative location with the shaft 16-1, and the shape of the lid guide 16-2, and the height of the shape of the lid guide 16-2 is changed from a contact position of the lid opening/closing detecting lever 15-1 wherein at least the contact point to a contact 15-5 of the safety switch 15 and the contact point of a terminal 15-6 become closed, to the direction wherein the contact point of the safety switch becomes opened. By doing this, when the lid 16 is under a closed condition, the press-contact between the contact 15-5 and terminal 15-6 is ensured, and the detecting speed of a lid opening detection is improved, and it is constituted in such a manner that a gap is not generated between the lid 16 and the main body 13 when a washing/spin-drying vessel 2 is rotating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching device for a washing machine used in general households.

[0002]

2. Description of the Related Art In a conventional washing machine, as shown in FIG. 3, a washing tub / dehydrating tub 2 is provided inside a water tub 1 for storing water at the time of washing. A pulsator 3 for stirring and a large number of small holes 4 for draining water are provided on the side wall. The bearing box 5 has a mechanism for transmitting the driving force of the motor 6 so as to rotationally drive only the pulsator 3 at the time of washing and the washing tub / dehydrating tub 2 at the time of dehydration. Also,
The motor 6 transmits the driving force to the bearing box 5 by the belt 7 and the pulley 8. A water tank 1, a motor 6, a bearing box 5 and the like are arranged on the reinforcing plate 9, and are supported by a supporting rod 10 from the upper corners of the main body 13 via the suspension 11 and the ball seat 12. . Reference numeral 14 is a balancer provided above the washing and dehydrating tub 2. At this time, the clothes are rarely evenly distributed inside the washing / dehydrating tub 2, and the dehydration action is performed while the clothes are unevenly distributed. The uneven distribution of the clothes causes an unbalance of the rotating object. And was a cause of vibration.

Now supporting rod 10 and suspension 11
A structure supported by an anti-vibration system such as is referred to as a vibration system, and a natural frequency is included in the vibration system and the anti-vibration system. If the frequency generated in the vibration system and the natural frequency coincide with each other during dehydration, the amplitude of the vibration system becomes extremely large and collides with the main body 13, resulting in a dangerous state. In order to prevent this, a safety switch 15 that operates by mechanical contact is installed in the upper rear part of the water tank 1, and when the lateral amplitude exceeds a certain level, the motor 6 is forcibly energized. It was cut off by the motor control device 6a that controls ON and OFF of the, and the rotation of the washing tub / dehydration tub 2 was stopped by the brake mechanism installed in the bearing box 5.

The safety switch 15 also functions as an open / closed detection switch for the lid 16 engaged with the upper portion of the main body 13 shown in FIG. 4 by the shaft 16-1. When the lid 16 is opened during dehydration, the safety switch 15 can also be used for washing. Since the dehydration tub 2 is in a dangerous state because it is rotating, the motor control device 6a for controlling forcibly shuts off the power supply to the motor 6, and the brake mechanism installed in the bearing box 5 causes the dehydration tub to also serve as a washing tub. The rotation of 2 was stopped.

The structure of the safety switch 15 and the lid 16 will be described with reference to FIG. The lid opening / closing detection lever 15-1 for detecting the opening / closing of the lid 16 is a lid guide 16-2 that is projected in parallel to the mounting surface 15-2 of the safety switch 15 from a shaft 16-1 that serves as an opening / closing fulcrum of the lid 16. The contact 15 fixed to the safety switch main body 15-4 via the movable body 15-3 that activates the contact 15-5 provided with the contact 15-5a of the safety switch 15 that is energized by the switch. Contact point 5-5a for energizing between -5 and switch
The contact pressure of the terminal 15-6 in which is arranged is secured, and the switch is turned on and off in accordance with the movement of the lid 16 of the lid guide 16-2 to open (direction A) and close (direction B). In addition, vibration detection during dehydration makes the detection position constant,
The vibration detection lever 15-8 is pressed in the C direction by the pressing spring 15-7 to press the movable body 15-3. At this time, since the lid 16 is closed during dehydration, the contact 15-5 and the terminal 15-6 are O.
Since the N state is set, when the water tank 1 operates in the F direction on the vibration detection lever 15-8, the vibration detection lever 15-8 changes
Vibration detection lever 1 for rotational movement based on the fulcrum S
The upper part U of 5-8 is separated from the safety switch main body 15-4, the movable body 15-3 moves downward, the contact 15-5 and the terminal 15-6 are turned off, and the vibration is detected.

It has been proposed that a safety switch is formed by forming a protrusion having a horizontal surface and an inclined surface on the upper portion of a safety lever as shown in Japanese Utility Model Laid-Open No. 38-91385. .

[0007]

However, in the safety switch 15 and the lid guide 16-2 configured as described above, in order to secure the contact pressure between the contact 15-5 and the terminal 15-6 when the lid 16 is closed. Lid open / close detection lever 1
It is necessary to push up the contact 15-5 with a constant stroke at 5-1. Further, this contact pressure is necessary to function as a switch, and if the contact pressure is small, it may malfunction due to disturbance such as vibration during washing and dehydration. On the contrary, when the lid 16 is opened, the stroke delays the lid opening detection, and when the washing tub / dehydrating tub 2 is rotating, a gap is created between the lid 16 and the main body 1 and a hand is left in the gap. It will be in a dangerous state that will enter. Further, the one disclosed in Japanese Utility Model Laid-Open No. 38-91385 requires a safety lever having a special structure and a safety switch having a special structure.

The present invention solves the above-mentioned problems of the prior art by ensuring the contact pressure between the contact and the terminal when the lid is closed and improving the detection speed of the lid opening detection. An object of the present invention is to provide a switch device of a washing machine having a simple structure that prevents a gap from being generated between the lid and the main body when rotating.

[0009]

In order to achieve the above object, a switch device for a washing machine according to the present invention comprises a lid, which is engaged with an upper portion of a main body by a shaft, and is disposed at a position opposed to the shaft. The lid opening / closing detection lever of the safety switch is brought into contact with the plate-shaped lid guide, and the shape of the lid guide is set so that at least the contact position of the lid opening / closing detection lever at which the contact of the safety switch is closed is set to the contact of the safety switch. The means for solving the problem is that the height is changed so as to incline toward the opening.

[0010]

With the above structure, the contact pressure between the contact and the terminal is secured when the lid is closed, the detection speed of the lid opening detection is improved, and the lid and the main body are rotated when the washing tub / dehydrating tub is rotating. There is no gap between the lid and the main body when the washing tub / dehydrating tub is rotating to prevent a dangerous situation where a hand gets into the gap. You can

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A switch device for a washing machine according to an embodiment of the present invention will be described below with reference to FIGS. The same parts as those of the conventional example are indicated by the same numbers and their explanations are omitted. Further, since the entire structure of the automatic washing machine and the structure and function of the safety switch are the same as those of the conventional example, the description thereof will be omitted.

In FIG. 1, a lid opening / closing detection lever 15-1
A cover guide 16-2 is provided on the mounting surface 15-2 of the safety switch 15 so as to project in a substantially horizontal direction from the shaft 16-1 of the cover 16 on the upper part of the main body 13 with which the cover guide 16-2 abuts. This lid guide 1
The shape of 6-2 is the safety switch 15 when the lid 16 is closed.
Contact 15-5a contact 15-5 and terminal 15
From the position where the lid opening / closing detection lever 15-1 abuts at the distance D from the mounting surface 15-2 of the safety switch 15 in order to secure the contact pressure of the contact at the end of -6, the contact 15-5 and the terminal 15 In order to change the height in the direction in which -6 is opened, that is, in the downward direction with respect to the safety switch 15, from the position where the lid guide 16-2 and the lid opening / closing detection lever 15-1 abut to the end portion. The shape is such that a curved surface is formed below.

The operation of the lid opening / closing detection lever 15-1 will be described with reference to FIG.
5-1 moves in the e direction around the fixed shaft 15-1a, and the lid guide 16-2 moves in the f direction around the shaft 16-1. For this operation, the shape of the lid guide 16-2 is changed to a shape in which a curved surface is formed downward from the position where the lid guide 16-2 and the lid opening / closing detection lever 15-1 contact each other to the end. 2 for stroke g of lid opening / closing detection lever 15-1 (h
-G) difference occurs, and the safety switch 15 operates sensitively to the opening / closing angle of the lid 16.

In this embodiment, the shape of the lid guide 16-2 is a shape in which a curved surface slope is formed downward from the position where the lid guide 16-2 and the lid opening / closing detection lever 15-1 abut to the end. However, the contact 15- of the safety switch 15
The same effect can be obtained by inclining linearly or stepwise in the opening direction of 5 and the terminal 15-6.

[0015]

As is apparent from the above description of the embodiments, according to the switch device of the washing machine of the present invention, the lid engaged with the shaft at the upper portion of the main body is disposed at a position facing the shaft. The lid opening / closing detection lever of the safety switch is brought into contact with the substantially plate-shaped lid guide, and the shape of the lid guide is set to at least the safety position from the contact position of the lid opening / closing detection lever at which the contact of the safety switch is closed. The height of the switch contact is changed to open so that the contact pressure between the contact and the terminal is secured when the lid is closed, the detection speed of lid open detection is improved, and the washing and dewatering tub rotates. Do not create a gap between the lid and the main body during operation, and when the washing tub / dehydrating tub is rotating, create a gap between the lid and the main body The great effect of being able to prevent the dangerous state of It can be achieved. The present invention is excellent in that the above effects can be obtained by simply specifying the shape of a conventional lid guide.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a switch device for a washing machine showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a main part for explaining the operation of the switch device of the washing machine.

FIG. 3 is a vertical cross-sectional view showing the overall configuration of the washing machine.

FIG. 4A is a longitudinal sectional view of a main part of a conventional switch device for a washing machine. (B) An enlarged sectional view of a fulcrum of the vibration detection lever shown in (b) of FIG. (C) An enlarged cross-sectional view of the upper portion of the vibration detection lever shown in (c) of FIG.

[Explanation of symbols]

 13 Main body 15 Safety switch 15-5a Safety switch contact 15-1 Lid opening / closing detection lever 15-5 Contact 15-6 Terminal 16 Lid 16-1 Shaft 16-2 Lid guide

Claims (1)

[Claims] 1. A substantially plate-shaped lid guide disposed at a position opposed to the shaft on a lid engaged with a shaft on an upper portion of the main body,
The lid opening / closing detection lever of the safety switch is brought into contact, and the shape of the lid guide is adjusted so that at least the position of the lid opening / closing detection lever at which the contact of the safety switch is closed causes the contact of the safety switch to be opened. Switch device for washing machines with varying inclination.