JPH0329439B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine equipped with a small lid switch that stops operation when abnormal vibration is detected or when the lid is opened, and particularly to a safety switch actuating device constituting the lid switch. It is related to.

Generally, a washing machine, for example, a front panel type fully automatic washing machine, has a configuration as shown in Figs. An outer tank 4 and a drive device 5 are suspended by a corner plate with a rod 3 interposed therebetween. 6
A cylindrical inner tank with a bottom is disposed within an outer tank 4, and has a pulsator 7 at the center of the bottom. Reference numeral 8 denotes a front panel provided at the upper front of the outer frame 1, on which a switch, an indicator lamp, a buzzer, etc. are attached. 9 is a top cover made of metal such as an iron plate or resin that covers the top surface of the outer box; 10 is a step provided in the center of the top cover 9; approximately in the center, there is a laundry input/take-out port 11 connected to the inner tub 6; It is provided. Reference numeral 12 denotes a lid provided on the stepped portion 10 so as to be openable and closable. Reference numeral 13 denotes a safety switch which has the function of detecting abnormal vibrations of the outer tank 4 and stopping the operation, and also the function of stopping the operation when the lid 12 is opened beyond a safe angle. 14 is outer frame 1
A water supply valve device provided on the rear surface is connected via a hose 15 to a water supply port 16 provided facing above the inner tank 6. 17 is a drainage pump provided at the bottom of the outer frame 1.

In the front panel type fully automatic washing machine configured as described above, the safety switch 13 is installed at the circular outer periphery of the outer tub 4 because it is necessary to detect abnormal vibrations of the outer tub 4 and detect the degree of opening of the lid 12. This is limited to a narrow space created at the rear corner of the rectangular outer frame 1.
Therefore, the main body of the safety switch 13 needs to be as small and compact as possible.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an operating structure for a safety switch that is small in size and operates reliably. Its basic configuration is as follows. That is,
A lever body is provided on the lid, and a lid lever and a switch lever with an engaging piece in the middle are rotatably engaged with a substantially U-shaped switch base, and the switch lever is operated. A switch for opening and closing the operating circuit is installed, and the lid lever is provided with a variable-position adjustment fitting corresponding to the lever body, and an engagement hole that can be freely engaged and detached from the engagement piece is provided. A vibration detection lever is rotatably supported, and the abnormal vibration detection lever is biased by a spring in a direction in which the engagement hole and the engagement piece engage.

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 5 is an exploded perspective view of the safety switch 13, and 20 is a board holding the safety switch 13;
1 is a substantially U-shaped switch base that is screwed to the board 20, and has a fastening hole 21A at the top of one side;
It has square holes 21B and 21C in its lower and bottom faces, and a locking hole 21D in its other side. 22 is a switch, for example, a micro switch, which is screwed to the switch base 21, and has an operation button 22A on the bottom surface. Reference numeral 23 denotes a switch lever, which has a locking pawl 23A at one end and a switch actuating part 23 at the other end.
B and an engaging piece 23C in the middle. 2
Reference numeral 4 denotes a lid lever, which has a locking claw 24A at one end, an elongated hole 24B at the other end, and an engaging piece 24C in the middle. 25 is the abnormal vibration detection lever, with 2 on the top.
It has two engagement holes 25A, 25B and a spring hole 25C below them. 26 is the elongated hole 2 of the lid lever 24
It is an adjustment fitting screwed to 4B and has a protrusion 26A.

Next, the assembly of each part will be explained. As shown in FIG. 6, the switch lever 23 has a locking claw 23A.
Insert into the locking hole 21A of the switch base 21,
By bending the tip, the lid lever 24 can be rotatably engaged.Similarly, the lid lever 24 can be rotatably engaged by inserting the hooking claw 24A into the hooking hole 21D of the switch base 21 and bending the tip. wear it. In addition, the abnormal vibration detection lever 25 is connected to the engagement hole 25.
B is rotatably supported by engaging the engagement piece 24C of the lid lever 24, and the switch base 2
It is biased by a spring 27 placed between the spring receiver 21E of No. 1 and the spring hole 25C. Further, the switch lever 23 is engaged when the lever body 28 provided on the rear surface of the lid 12 comes into contact with the abutting portion 26A of the adjustment fitting 26 and the lid lever 24 is lifted with the lid 12 closed. Joint piece 23C is abnormal vibration detection lever 25
At the same time, the switch operating portion 23B engages with the engagement hole 25A of the micro switch 22.
Pushing A.

Next, the operation of the safety switch 13 will be explained with reference to FIG. First, when the lid 12 is opened, the adjustment lever 2
The lever body 28 that was in contact with the lid 12 rotates together with the lid 12. The lid lever 24, which has lost the support of the lever body 28, is rotated to the position 24' by the biasing force of the spring 27. At the same time, the abnormal vibration detection lever 25 engaged with the engagement piece 24C moves down. Also, at this time, the abnormal vibration detection lever 25 is engaged with the switch lever 23 through the engagement hole 25A, so
The switch lever 23 rotates to the 23' position,
The switch operating portion 23B at the end releases the bias against the operating button 22A of the microswitch 22. Then, the micro switch 22 opens the operating circuit of the washing machine and stops the washing machine.

In addition, when the lid 12 is closed, the switch operating section 23
B activates the operation button 22A and restarts the operation.

Next, when abnormal vibration occurs in the outer tank 4 during operation, the abnormal vibration detection lever 25
It rotates around the engagement piece 24C of No. 4 as a fulcrum and is displaced to the position of 25'. At this time, the engagement hole 25A is disengaged from the engagement piece 23C and the two are disengaged, the switch lever 23 is rotated by gravity to the position 23', and the switch actuating part 23B at the end is Release the bias on the operation button 22A of the switch 22. Then, the micro switch 22 opens the operating circuit of the washing machine and stops the washing machine.

To resume operation, open the lid 12 and rotate the lid lever 24 to position 24'. Then,
Abnormal vibration detection lever 25 locked on engagement piece 24C
goes down. As a result, the engagement hole 25A is also lowered,
Due to the urging force of the spring 27, the engagement hole 25A engages with the engagement piece 23C of the switch lever 23. When the lid 12 is closed in this state, the lid lever 24 rotates to the position shown by the solid line in FIG. 6, and the abnormal vibration detection lever 25 is lifted upward. At the same time, the switch lever 23 engaged with the abnormal vibration detection lever 25
Turn the micro switch 22 to the position shown by the solid line in the figure.
Press the activation button 22A. In this way, the washing machine resumes operation.

In addition, the safety angle of the lid 12 can be adjusted by using the elongated hole 24B.
This can be easily done by changing the mounting position of the adjustment fitting screwed to the. Safety switch 13
detects abnormal vibration of the outer tank 4 as a whole, and
The two functions of detecting the opening degree of the lid 12 are integrated, so one micro switch 22 is sufficient and it is extremely small.

It goes without saying that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with appropriate changes within the scope of the invention.

As described above, according to the present invention, it is possible to provide a safety switch operating structure that is small, has a small number of parts, and has reliable operation, which integrates the two functions of abnormal vibration detection and lid opening detection. The effects are extremely large, such as the ability to easily adjust the safe opening and stabilize quality.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a front panel type fully automatic washing machine according to an embodiment of the present invention, Fig. 2 is a plan view of the washing machine with the top cover removed, and Fig. 3 is a plan view of the top cover. FIG. 4 is a rear perspective view of the washing machine, FIG. 5 is an exploded perspective view showing the operating structure of the safety switch, FIG. 6 is a longitudinal sectional view of the operating structure, and FIG. 7 is a plan view thereof. 1... Outer frame, 9... Top cover, 12...
Lid, 21...Switch base, 22...Micro switch (switch), 23...Lever for switch, 23C...Engagement piece, 24...Lever for lid, 2
5... Abnormal vibration detection lever, 25A... Engagement hole,
26...adjustment fitting, 27...spring, 28...lever body.

Claims (1)

[Claims] 1. It has a lid that can be opened and closed freely on the top cover placed on the outer frame, a lever body provided on this lid, and a switch base that is approximately U-shaped, and this switch base has a lever for the lid. A switch lever having an engaging piece in the middle is rotatably engaged and a switch for opening/closing the operating circuit is attached to the switch lever, which is operated by the switch lever, and the lid lever is attached to the lever body. Correspondingly, an abnormal vibration detection lever is rotatably supported, and an adjustment fitting is provided in a variable position, and an engagement hole is provided that can be freely engaged with and disengaged from the engagement piece. An operating device for a safety switch for a washing machine, which is biased by a spring in a direction in which the engagement hole and the engagement piece engage.