JPH0928981A - Safety device for washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device for a washing machine, which can detect the opening of a lid body for a washing tank, and the vibration of the washing tank at a high precision. SOLUTION: This safety device 41 for a washing machine, is respectively equipped with a switch operating arm 42 which is axially supported by an extended part 34 of an upper lid 6 for a main body case 2, a switch for braking of an internal tank, being arranged so as to be in contact with the arm 42, and a vibration detecting lever 45 of which the lower end 53 comes into contact with the arm 42 to rotate the arm 42 when an external tank shakes by a specified width or higher. Then, when the upper lid 6 is opened, the switch is driven by integrally interlocking the arm 42 with the opening of the upper lid 6. Also, when the vibration detecting lever 45 operates, the switch is driven by rotating the arm 42 around the spindle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a washing machine, and more particularly, to a switch for braking a washing tub when the lid of the washing tub is opened or when the washing tub vibrates more than a predetermined width. The present invention relates to a safety device for a washing machine configured to detect the above and brake the washing tub.

[0002]

2. Description of the Related Art To detect the opening of a lid of a washing tub and the shake of the washing tub to brake the washing tub, for example, as shown in FIGS.
A safety device for a washing machine as shown in FIG. 13 is used. This safety device includes a board 102 fixed to a washing machine body 101 and a leaf spring switch 1 arranged on the board 102.
03, and an arm 106 that is rotatably arranged around a fulcrum 104 formed between the base plate 102 and the base plate 102 and that operates in conjunction with opening of the lid body 105; The shake detection lever 108 that detects and swings around the fulcrum 107, the substrate 102, and the shake detection lever 10
A spring 10 that is provided between the spring 10 and the shake detecting lever 108 and urges one end of the shake detecting lever 108 in a direction to press the leaf spring switch 103.
It is mainly composed of 9.

When the washing tub vibrates over a predetermined width, the shake detecting lever 108 resists the urging force of the spring 109 and supports the fulcrum 10.
It swings around 7 to drive the leaf spring switch 103 (FIG. 12). On the other hand, when the lid 105 is opened, the arm 10
6 rotates around the fulcrum 104, and drives the leaf spring switch 103 via the shake detection lever 108 pressing the leaf spring switch 103 (FIG. 13). Leaf spring switch 10
When 3 is driven, the braking mechanism of the washing tub and the pulsator is activated, and the rotation of the washing tub is immediately stopped.

[0004]

In the safety device for a washing machine described above, when the lid 105 is opened, the leaf spring switch 103 is driven from the lid 105 via the arm 106 and the shake detection lever 108. . Therefore, it is difficult to obtain stable operation of the safety device due to the dimensional accuracy and mounting angle of each member, and it is necessary to finely adjust each device. In particular, if the operation of the safety device is unstable, there is a danger that the washing tub may rotate when the opening gap of the lid 105 is large.

An object of the present invention is to provide a safety device for a washing machine capable of detecting the opening of the lid of the washing tub and the shake of the washing tub with high accuracy.

[0006]

According to the safety device for a washing machine of the present invention, a switch actuation arm pivotally supported by a part of a lid of a washing machine main body and a switch actuation arm are arranged so as to abut against the actuation arm. A washing tub braking switch, and a shake detection lever for abutting and rotating a part of the washing tub when the washing tub vibrates over a predetermined width. The switch actuating arm is interlocked with the opening of the lid to drive the braking switch, and when the shake detection lever is actuated, the actuating arm is rotated around its support shaft to drive the braking switch. A safety device for a washing machine is provided which is configured as described above.

In this safety device for a washing machine, the switch operating arm is provided with a stopper for restricting its rotation and a spring mechanism for urging the arm in a direction to be locked by the stopper, and when the lid is opened, this is provided. It is preferable that the arm integrally operates with the movement of the lid without rotating.
The stopper is a lock position formed by the urging force of the spring mechanism and the stopper, and when the switch operating arm rotates integrally with the movement of the lid when the lid is opened,
It is preferable that a part of the switch actuating arm is in contact with the main part of the washing machine and each member including the stopper is positioned so as not to be damaged.

The shake detecting lever is pivotally supported by the main body of the washing machine, one end side is arranged in proximity to the washing tub, and the other end side is arranged in proximity to the switch actuating arm. Is preferred. The safety device of the washing machine is such that when one end of the shake detection lever comes into contact with the washing tub, the other end of the lever comes into contact with the switch operation arm,
It is preferable to rotate the arm around its supporting shaft to drive the switch against the biasing force of the spring mechanism.

In the washing machine safety device of the present invention,
When the lid is opened, the switch operating arm drives the braking switch integrally with the opening of the lid, so that the operation accuracy of the safety device is less likely to be affected by the dimensional accuracy and mounting accuracy of each member. . Therefore, a small opening (distance, angle) of the lid can be detected with high accuracy.

The safety device of the washing machine is provided with a stopper for restricting the rotation of the switch operation arm and a spring mechanism for urging the arm in a direction to be locked by the stopper, and the arm is opened when the lid is opened. If it is configured to work together with the movement of the lid without rotating, the movement of the lid can directly drive the braking switch, so that even a slight opening of the lid can be performed with higher accuracy. Can be detected with.

A shake detection lever is pivotally supported by the main body of the washing machine, one end side is arranged close to the washing tub, and the other end side is arranged close to the switch operating arm. With the configuration, as in the conventional example described above, a stable fulcrum fixed to the washing machine body is provided without providing a fulcrum on an unstable switch operating arm that is pivotally supported by the washing machine body and rotates. Since it rotates around this fulcrum, the operation accuracy of the safety device is unlikely to be affected by the dimensional accuracy and mounting accuracy of each member.

In the safety device of the washing machine, when one end of the shake detecting lever comes into contact with the washing tub, the other end of the lever comes into contact with the switch operating arm and the arm is supported against the urging force of the spring mechanism. If it is configured to drive the switch by rotating it around, the detection range of the shake motion of the shake detection lever is expanded, and the braking switch can be driven reliably regardless of the shake of the washing tub. it can.

[0013]

1 shows a general fully automatic washing machine to which the present invention is applied. This fully automatic washing machine 1
Is a main body case 2, a washing tub outer tub 3 elastically supported inside the main body case 2 via a hanging rod (not shown), and a washing tub inner tub 4 rotatably supported inside the outer tub 3. And a stirring mechanism section 5 arranged under the washing tubs 3 and 4.

The main body case 2 is a box body having an open top surface, and an upper lid 6 as a cover body which covers the top surface of the main body case 2 in an openable and closable manner is arranged at the top. An electromagnetic valve 17 and a water injection conduit 18 for injecting water into the washing tubs 3 and 4 are provided on the upper portion of the main body case 2. An electromagnetic valve 7 and a flexible drainage pipe 8 for discharging the wash water in the outer tub 3 to the outside of the main body case 2 are connected to the lower portion of the main body case 2.

A pressure hose 10 is connected to the lower portion of the outer tub 3 from an air trap 9, and an upper end portion of the pressure hose 10 is connected to a water level sensor 12 arranged in a controller 11. The inner tank 4 is a cylindrical member made of stainless steel and having an open top, and is supported by the outer tank 3 by a support shaft portion 13. A large number of dehydration holes 4a are formed on the side surface of the inner tank 4, and a stirring mechanism section 5 is arranged at the bottom.

The stirring mechanism section 5 is connected to the motor 1 through the pulsator 14, the bearing case 15 and the belt mechanism.
6. The pulsator 14 is rotatably arranged on the bottom surface of the inner tank 4 via the stirring mechanism section 5.
A lower blade 21 is provided on the lower surface of the pulsator 14 for stirring the washing water at the bottom of the inner tub 4 and diffusing it in the outer peripheral direction.
An annular body 22 for rectification is arranged at the bottom of the inner tank 4 on the outer periphery of the pulsator 14. The bearing case 15 includes an upper lid 6
A brake mechanism for braking the rotation of the inner tub 4 in the dehydration process by the operation of a switch, which will be described later, arranged behind is disposed.

2 and 3 show an embodiment in which the present invention is applied to the washing machine 1 of FIG. 1, in which the upper lid 6 supports a shaft supporting portion 31 formed on the upper portion of the main body case 2. As a shaft, it is rotatably arranged so as to open from the front part of the upper lid 6, and can be folded by a support shaft 32 formed in the central part. At the front part of the upper surface of the upper lid 6, a handle 33, which is a recess for opening and closing, is formed. The front part of the upper lid 6 is
Body case 2 to prevent invasion of hands or solid foreign matter
It is closed in close contact with the opening. At the rear portion of the upper lid 6, an extending portion 34 extending from the shaft supporting portion 31 into the rear portion of the main body case 2 is formed, and the extending portion 34 is provided with a stopper 35 for a switch operating arm described later. There is. A safety device 4 is provided inside the main body case 2 behind the upper lid 6.
1 is arranged.

As shown in FIGS. 4 and 5, the safety device 41 has a leaf spring having a switch operating arm 42 pivotally supported by the extending portion 34 and a contact portion 43 above the arm 42. -Type switch 44, and the shake detection lever 4 whose one end is arranged above the arm 42 alongside the switch 44.
5 is a mechanism portion mainly composed of 5 and 5 for detecting the opening of the upper lid 6 and the shake of the outer tub 5 to prohibit the dehydration operation.

The switch operating arm 42 has an extending portion 34.
Is rotatably arranged around the shaft supporting portion 46 formed in the above, and a torsion coil spring 47 as a spring mechanism is arranged in the shaft supporting portion 46. The switch actuating arm 42 projects from the upper portion of the shaft support 46 and contacts the stopper 35.
And a tongue piece 49 extending from the shaft support portion 46 toward the rear portion of the main body case 2 at a substantially right angle from the protruding portion 48.
The rotation of the arm 42 is restricted by the stopper 35, and the arm 42 is urged by the spring 47 in the direction of being locked by the stopper 35 (counterclockwise direction in FIG. 5). The stopper 35 restricts the rotation of the arm 42 so that the lower surface of the arm 42 in the locked position is located above the extension line of the lower end surface 34a of the extending portion 34 of the upper lid 6.

As shown in FIG. 6, the switch 44 has a contact portion 43 consisting of a pair of contact plates 43a and 43b facing each other in the vertical direction, a base portion 51 for sandwiching the contact portion 43, and a rear portion extending from the base portion 51. It is composed of the lead portion 52 that has come out,
It is fixed to the body case 2 at the base portion 51. A cap 53 for protecting the contact plate is attached to the tip of the lower contact plate 43a. The lead portion 52 is the stirring mechanism portion 5.
Is connected to the control unit 11 which is connected to. With this configuration, when the upper lid 6 is opened, the switch operating arm 4
It is possible to drive the braking switch 44 integrally with the opening of the upper cover 6 without the rotation of the shaft 2 around the shaft support 46.

The shake detecting lever 45 is rotatably arranged around a shaft support portion 51 formed in the main body case 2 near the tongue piece 49, extends to a position right above the tongue piece 49, and the upper surface of the tongue piece 49. An upper end 52 whose lower surface is arranged close to the lower end 53, a lower end 53 extending downward from the shaft support 51 at a substantially right angle to the upper end 52, and a torsion coil spring 54 arranged around the shaft support 51. It is mainly composed of and (FIGS. 5 and 7).
Further, in the vicinity of the shaft support portion 51, a protruding portion 55 protruding rearward toward the main body case 2 side is formed, and the protruding portion 55 comes into contact with a stopper 56 formed in the main body case 2 to rotate. It is regulated. The shake detecting lever 45 is biased by a spring 54 in a direction in which the stopper 56 is locked (clockwise direction in FIG. 5).

In the contact portion 43, the contact plate 43a is pressed by the tongue piece 49 via the cap 53 in the state where the upper lid 6 is closed to maintain the contact state with the upper contact plate 43b and rotate the inner tank 4. Allowed (Fig. 6) and when the top lid 6 is opened (Fig. 1
0) or when the upper end 52 of the shake detection lever 45 is pushed down (FIG. 9), the cap 53 and the lower contact plate 4
3a is arranged so as to separate from the upper contact plate 43b and prohibit the rotation of the inner tank 4.

When the upper lid 6 is opened in a state in which the inner tub 4 is rotated and the stored clothes are dehydrated, as shown in FIG.
As shown in FIG. 5, the switch actuating arm 42 is displaced around the shaft support 31 integrally with the rotation of the upper lid 6 around the shaft support 31, and the lower contact plate 43 a is connected to the upper contact plate via the cap 53. The inner tank 4 is prohibited from rotating from 43b.
At this time, the shake detection lever 45 is kept in a state in which its rotation is restricted by the stopper 56 and is biased by the spring 54 in the direction in which it is locked by the stopper 56.

On the other hand, when the lower end 53 of the shake detection lever 45 contacts the outer tub 3 in a state where the inner tub 4 is rotated and the stored clothes are dehydrated, as shown in FIG. 45 rotates around the shaft support 51, and the upper end 52 pushes down the tongue piece 49 against the biasing force of the spring 47. Tongue piece 4
When 9 is pushed down, as shown in FIG.
The lower contact plate 43a is separated from the upper contact plate 43b through 3, and rotation of the inner tank 4 is prohibited. At this time, the upper lid 6 is held in the fully closed state.

As described above, in one embodiment of the above-mentioned embodiment,
When the upper lid 6 is opened, the switch actuating arm 42 moves the upper lid 6
Since the braking switch 44 is driven integrally with the opening of the switch, the switch actuating arm 42 is directly driven without rotating around the shaft supporting portion 46 formed on the upper lid 6, and each member is The operation accuracy of the safety device 41 is unlikely to be affected by the dimensional accuracy and the mounting accuracy. Therefore, even if the upper lid 6 is slightly opened, it can be reliably detected.

Since the switch actuating arm 42 is provided with a stopper 35 for restricting its rotation and a spring 47 for biasing the arm 42 in a direction to be locked by the stopper 35, when the upper lid 6 is opened. This arm 4
2 is configured so as to be integrally interlocked with the movement of the upper lid 6 without rotating around the shaft supporting portion 46, and the braking switch 44 can be directly driven by the movement of the upper lid 6, so that the upper lid 6 is slightly moved. Such openings can be detected with higher accuracy.

A shake detection lever 45 is pivotally supported by the main body case 2, a lower end 53 is arranged near the outer tub 3, and an upper end 52 is arranged close to the switch actuating arm 42. Since the switch 44 for driving is driven, unlike the conventional example, the stable switch formed on the main body case 2 can be provided without providing the fulcrum 107 on the unstable switch operating arm 106 which is pivotally supported by the main body case of the washing machine and rotates. It is pivotally supported so as to rotate around the pivot support portion 51. Therefore, the operation accuracy of the safety device 41 is ensured.

Further, when the lower end 53 of the shake detecting lever 45 contacts the outer tub 3, the upper end 52 is moved to the switch operating arm 4
Since the arm 42 is rotated against the biasing force of the spring 47 to drive the switch 44 by rotating the arm 42 around its pivotal support 46, the detection width of the shake detection lever 45 is increased. Therefore, the braking switch 44 can be driven reliably regardless of the magnitude of the shake of the outer tub 3.

Further, the stopper 35 cooperates with the spring 47 to set the lock position of the arm 42 so that the lower surface of the arm 42 does not protrude from the extension line (the one-dot chain line A in FIG. 10) of the lower end surface 34a of the extension portion 34. Since it is set, the arm 42 does not contact the wall surface 2a of the main body case 2 when the upper lid 6 is opened and is in the fully opened state. Therefore, the arm 42, the stopper 35, or the wall surface 2a is not damaged by the external force during the opening operation.

[0030]

In the safety device for a washing machine according to the present invention, when the lid is opened, the switch actuating arm drives the braking switch integrally with the opening of the lid, so that the safety device operates accurately. Is secured. Therefore, a small opening (distance, angle) of the lid can be detected with high accuracy.

The safety device of the washing machine is provided with a switch operating arm having a stopper for restricting its rotation and a spring mechanism for urging the arm in a direction to be locked by the stopper, and the arm is opened when the lid is opened. If it is configured to work together with the movement of the lid without rotating, the movement of the lid can directly drive the braking switch, so that even a slight opening of the lid can be performed with higher accuracy. Can be detected with.

A shake detecting lever is pivotally supported by the main body of the washing machine, one end side is arranged in proximity to the washing tub, and the other end side is arranged in proximity to the switch actuating arm. The shake detecting lever swings to drive the braking switch. With the configuration, as in the conventional example described above, a stable fulcrum fixed to the washing machine body is provided without providing a fulcrum on an unstable switch operating arm that is pivotally supported by the washing machine body and rotates. Since it rotates around this fulcrum, the operation accuracy of the safety device is less affected by the dimensional accuracy and mounting accuracy of each member, and the operation accuracy of the safety device is ensured.

In the safety device of the washing machine, when one end of the shake detecting lever comes into contact with the washing tub, the other end of the lever comes into contact with the switch operating arm, and the arm is supported against the urging force of the spring mechanism. If it is configured to drive the switch by rotating it around, the detection range of the shake motion of the shake detection lever is expanded, and the braking switch can be driven reliably regardless of the shake of the washing tub. it can.

For this reason, it is possible to reduce the work of fine adjustment for each device at the time of mounting each member related to the safety device as in the prior art. Further, it is possible to avoid the situation where the washing tub rotates in a state where the opening gap of the lid is large. Therefore, the opening of the lid of the washing tub and the shake of the washing tub can be detected with high accuracy, and in particular, the slight opening of the lid can be detected, so that the safety is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a washing machine according to an embodiment of the present invention.

FIG. 2 is a plan view of the washing machine shown in FIG.

3 is a cross-sectional view of the upper portion of the washing machine including the safety device and the upper lid of FIG.

FIG. 4 is an enlarged view of the safety device portion of FIG.

5 is a cross-sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI in FIG.

7 is a side view of the shake detection lever of FIG.

FIG. 8 is a view corresponding to FIG. 5 showing the operation of the operation arm when the shake detection lever is operated.

FIG. 9 is a view corresponding to FIG. 6 showing the operation of the switch when the shake detection lever is activated.

FIG. 10 is a view corresponding to FIG. 6 showing a state of the switch when the upper lid is opened.

FIG. 11 is a sectional view of a conventional safety device.

FIG. 12 is a view showing a state where the shake detection lever of FIG. 11 is operated.

13 is a diagram showing a state in which the upper lid of FIG. 11 is opened.

[Explanation of symbols]

 1 Fully automatic washing machine 2 Main body case 3 Outer tub 4 Inner tub 5 Stirring mechanism section 6 Upper lid (lid) 31 Shaft support section 34 Extension section 35 Stopper 41 Safety device 43 Contact section 44 Switch 45 Shake detection lever 46 Shaft support section 47 Spring 49 Tongue piece 51 Shaft support 52 Upper end 53 Lower end

[Procedure amendment]

[Submission date] September 8, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

In this washing machine safety device, a switch is operated.
A stopper for restricting rotation of the arm and a spring mechanism for urging the arm in a direction to be locked by the stopper are provided between the arm and the lid, and the arm rotates when the lid is opened. Instead, it is preferable that the movement is integrally linked with the movement of the lid. The stopper is the switch operating arm
It is formed on either one of the lids, and its contact surface is on the other
It only has to be formed. When the switch operating arm rotates integrally with the movement of the lid body when the lid body is opened at the lock position formed by the urging force of the spring mechanism and the stopper, a part of the switch operating arm is rotated. It is preferable that each member including the stopper is positioned so as not to be damaged by coming into contact with the main body of the washing machine.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

The safety device of the washing machine is a switch operating arm.
A stopper for restricting rotation of the arm and a spring mechanism for urging the arm in a direction to be locked by the stopper are provided between the lid and the lid, and the lid does not rotate when the lid is opened. If it is configured to be linked with the movement of the body, the movement of the lid can directly drive the braking switch, so that a slight opening of the lid can be detected with higher accuracy. .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

A switch is provided on the extending portion 34 of the upper lid 6.
A stopper 35 for restricting the rotation of the moving arm 42 is provided.
The arm 4 is provided between the extension 34 and the arm 42.
2 is urged in the direction in which it is locked by the stopper 35.
Since the spring 47 is provided, when the upper lid 6 is opened, the arm 42 is configured so as to be integrally interlocked with the movement of the upper lid 6 without rotating around the shaft support portion 46, and the movement of the upper lid 6 directly Since the braking switch 44 can be driven, the slight opening of the upper lid 6 can be detected with higher accuracy.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

The safety device of the washing machine is a switch operating arm.
A stopper for restricting rotation of the arm and a spring mechanism for urging the arm in a direction to be locked by the stopper are provided between the lid and the lid, and the lid does not rotate when the lid is opened. If it is configured to be linked with the movement of the body, the movement of the lid can directly drive the braking switch, so that a slight opening of the lid can be detected with higher accuracy. .

Claims (4)

[Claims] 1. A switch operating arm pivotally supported on a part of a lid of a washing machine main body, a braking switch for a washing tub arranged so as to abut on the operating arm, and a washing tub having a predetermined width or more. Each of them is provided with a shake detection lever, a part of which abuts on the actuating arm when it vibrates and rotates the actuating arm. When the lid is opened, the switch actuating arm is integrally linked with the opening of the lid. Drive the braking switch,
A safety device for a washing machine, characterized in that, when the shake detecting lever is operated, the operating arm is rotated around its supporting shaft to drive a braking switch. 2. A switch operating arm is provided with a stopper for restricting its rotation and a spring mechanism for urging the arm in a direction to be locked by the stopper, and the arm is rotated when the lid is opened. The safety device for a washing machine according to claim 1, wherein the safety device is integrally linked with the movement of the lid body. 3. The shake detection lever is pivotally supported by the main body of the washing machine, one end side of which is arranged close to the washing tub and the other end of which is arranged close to the switch actuating arm. The safety device for a washing machine according to claim 1, which is driven. 4. When one end of the shake detecting lever comes into contact with the washing tub, the other end of the lever comes into contact with the switch operating arm, and the arm is rotated around its supporting shaft against the urging force of the spring mechanism. The safety device for a washing machine according to claim 2 or 3, wherein the switch is driven to drive the switch.