JPH1057676A - Lid switch of fully automatic washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fully automatic washing machine lid switch also serving as an unbalance detection switch which is easily to assemble and has a cost effective structure by reducing parts number such as a spring, etc., and reducing assembly manhour. SOLUTION: This lid switch is turned on and off by a lid lever 3 which works in cooperation with the opening/closing of the lid and also serves as an unbalance detection switch which is operated by a safety lever 4 displaced according to abnormal vibration during dewatering and clothes movement. The lid lever 3 in which the safety lever 4 is rotatably assembled is rotatably attached to an attaching base 1 to which a switch 2 is attached, a spring 5 is connected between the attaching base 1 and the safety lever 4, an unbalance detection arm 6 is attached under the safety lever 4, and a result is that the lid lever 3 is rotated together with the safety lever 4 by a tensile force of the spring 5, and only the safety lever 4 rotates by a displacement of the unbalance detection arm 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid switch which also functions as an unbalance detection switch of a fully automatic washing machine.

[0002]

2. Description of the Related Art In a fully automatic washing machine, during the spinning operation in which the washing and dewatering tub is rotated at a high speed, the laundry in the washing and dewatering tub is biased to one side, and the swing of the washing and dewatering tub is transmitted to the outer tub. ,
When the outer tub vibrates and comes into contact with the outer box of the washing machine and the entire washing machine is abnormally vibrated and cannot be dehydrated, this is detected, and clothes and the like that do not easily contain water float up. At the time of dehydration, it may jump out of the washing and dewatering tub, and may be caught between the outer tub and the outer box, causing breakage of clothing or breakage of the washing machine.

In order to prevent such a situation from occurring, an unbalance detection arm is provided on the outer periphery of the outer tub, which is displaced by abnormal vibration during dehydration and jumping out of the laundry. Is operated to detect the imbalance state and stop the dehydration operation.

The unbalance detection switch also serves as a lid switch, and engages with a lid lever that rotates when the lid is opened and closed, turns on and off in conjunction with opening and closing of the lid, closes the lid, and turns on the lid switch. After that, the dehydration operation starts, and if the lid is arbitrarily opened during dehydration, the lid switch is turned off and the dehydration operation is stopped.

[0005] As such a lid switch also serving as an unbalance detection switch, there is a conventional one as disclosed in, for example, Japanese Utility Model Laid-Open No. 56-131181 shown in FIG.
This is the switch 1 on the mounting base 11 fixed to the washing machine body.
0 is fixed, the pressing piece 13 of the switch 10 is fixed to the mounting base 11 via the spring 12, and the end of the safety lever 14 is engaged with the pressing piece 13.

The safety lever 14 has a spring 15 and a lid lever 1.
7, one end of the lid lever 17 is rotatably attached to the mounting base 11 by a spring 18, and the other end is engaged with the lid 16.

When the lid 16 of the washing machine is closed, the lid lever 17 is pushed up at the end of the lid against the elasticity of the spring 18, and if the safety lever 14 attached to the lid lever 17 is in the normal position in this state, The pressing piece 13 is pushed up by the safety lever 14 against the elasticity of the spring 12 and is separated from the operator of the switch 10, and the switch 10 is closed.

When the lid 16 of the washing machine is opened, the spring 1
8, the end of the lid lever 17 is pushed down, the safety lever 14 attached to the lid lever 17 rotates, and the engagement between the safety lever 17 and the pressing piece 13 is released, and the spring 12
The pressing piece 13 moves downward by the elasticity of
0 opens.

During the spin-drying operation in which the lid 16 is closed, the switch 10 is closed as described above, but due to the bias of the laundry in the spin-drying tub, the spin-drying tub and the outer tub swing, and the When the machine abnormally vibrates, the safety lever 14
Is displaced in the radial direction of the washing tub against the elasticity of the washing tub. As a result, the engagement between the safety lever 14 and the pressing piece 13 is released,
The pressing piece 13 moves downward by the elastic force of the spring 12, and the switch 10 is opened.

[0010]

As described above, the switch 1
As a configuration for turning on / off the 0, a lid lever 1
7. In addition to the safety lever 14, the pressing piece 13 is required as a separate member.
4. Springs 18, 15, 1 for operating the pressing piece 13
Two or three are required, the number of parts is large, the number of assembly steps is also large, and the cost is high.

With respect to the number of springs,
In the device described in Japanese Patent Publication No. 95, only one spring is sufficient, but even in this case, the mounting base of the switch is fixed to the top cover or the like of the washing machine with a screw, so that the assembly cannot be said to be easy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lid switch for a fully automatic washing machine which solves the disadvantages of the prior art, reduces the number of parts such as springs, reduces the number of assembling steps, is easy to assemble, and is inexpensive. Is to do.

[0013]

In order to achieve the above object, the present invention firstly turns on and off a lid lever that operates in conjunction with opening and closing of a lid, and is disposed so as to face the outer periphery of a washing tub. In the lid switch that also functions as an unbalance detection switch that is activated by the safety lever that is displaced by the abnormal vibration of the laundry and popping out of the laundry, the lid lever that combines the safety lever is freely rotatable on the mounting base on which the lid switch is mounted Engages, a spring is interposed between the mounting base and the safety lever, an unbalance detection arm is attached to the lower part of the safety lever, and the lid lever is rotated integrally with the safety lever by the pulling force of the spring. By configuring the safety lever to rotate only by the displacement of the balance detection arm, the lid lever and the safety lever can be rotated integrally with only one spring. It is also or can be rotated only safety lever.

Second, since the engaging recess formed in the lid lever is rotatably engaged with the locking projection formed in the mounting base, the mounting of the lid lever to the mounting base can be easily performed without the need for screwing or the like. .

Third, since the horizontal portion of the safety lever overlaps with the horizontal portion of the lid lever, and one end of the spring is fixed to the horizontal portion of the safety lever, when the lid is closed, it resists the elasticity of the spring. When the end of the lid lever is lifted up by the lid and the horizontal part rotates upward, the horizontal part of the safety lever that overlaps this horizontal part also rotates upward together and the safety lever presses the switch. And the switch closes.

Conversely, when the lid is opened, when the locking of the lid lever by the lid is released, the locking of the safety lever by the lid lever is also released, and the safety lever is urged downward by the pulling force of the spring. Turns and the switch opens.

Fourthly, a notch recess provided in the safety lever is rotatably and vertically and horizontally engaged with an edge of a hole formed in the lid lever, and a pressing piece of the safety lever is exposed upward from the hole. By pulling out and engaging the lid switch, the safety lever pivots not only vertically but also horizontally with respect to the lid lever, even when the safety lever is pushed in the circumferential direction of the washing tub due to jumping out of clothes etc. Only the safety lever moves and the switch opens.

Fifth, since the unbalance detection arm is made of a metal wire bent in a U-shape, even if the protruding clothing comes into contact with the arm, the clothing is hardly damaged.

Sixth, since the mounting table is formed integrally with the top cover of the washing machine, the mounting of the mounting table becomes unnecessary, and the number of assembling steps is further reduced, and the assembling becomes easier.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical sectional side view showing an embodiment of a lid switch of a fully automatic washing machine of the present invention, and FIG. 2 is an exploded perspective view of the lid switch of the present invention. The dehydration tub is disposed so as to face the outer rim of an outer tub provided therein.
Indicates a safety lever, 5 indicates a spring, and 7 indicates a lid.

As an example, the mounting base 1 is integrally formed with an end of the top panel 8 of the washing machine so as to protrude upward, and a lower portion of the mounting base 1 is formed in a space, and the lid lever 3 is provided here. The locking projection 1a to be locked is formed in an outward U-shape.

A notch 1b for locking one end of the spring 5 is provided at a lower portion of the side wall 1d facing the locking projection 1a.
The lower part of the top panel 8 is largely notched in the horizontal direction to form a notch space 1c.

The lid lever 3 is formed by bending one end of an elongated plate-shaped main body upward and further bending its tip horizontally outward to form a horizontal locking portion 3a with the lid 7. When the main body is mounted, It becomes the horizontal part 3c and here the safety lever 4
A large, elongated rectangular hole 3b for mounting the rectangular hole 3b is formed. The rectangular hole 3b is located on a side remote from the horizontal locking portion 3a, and the edge of the rectangular hole 3b is cut out to engage with the locking protrusion 1a. Recess 3
d was formed.

The safety lever 4 is formed by further bending the lower end of the elongated plate, which is bent substantially in a crank shape, upward in a U-shape.
A mounting hole 4d for an unbalance detection arm 6, which will be described later, is formed in the U-shaped bent portion. The elongated plate body bent in a substantially crank shape has a vertical pressing piece 4b for pressing the switch 2 from above, and a square hole in the lid lever 3. A horizontal portion 4e and a substantially U-shaped portion 4f are combined with the upper portion of the horizontal portion 3c so as to straddle the portion 3b.

The horizontal portion 4e is formed with a locking hole 4c for hooking the upper end of the spring 5, and both ends of the corner between the horizontal portion 4e and the substantially C-shaped portion 4f are cut out to form the notch 4a. Is a pivot point with respect to the lid lever 3.

The unbalance detection arm 6 is formed of a metal wire in a substantially elongated U shape, and its upper end is horizontally bent in the opposite direction to each other to form projections 6a to be inserted into the mounting holes 4d.

The spring 5 has upper and lower ends bent into a U-shape, and hook portions 5a, 5h, which are respectively engaged with the locking holes 4c and the notches 1b.
5b.

In order to assemble the mounting base 1, the lid lever 3, the safety lever 4, the spring 5, and the unbalance detection arm 6 configured as described above, first, the safety lever 4 is set on the lid lever 3. In this assembly, the pressing piece 4b and the horizontal portion 4e of the safety lever 4 are inserted into the square hole 3b formed in the lid lever 3 from below, and the horizontal portion 4e is inserted into the horizontal portion 3 of the lid lever 3.
In this state, the safety lever 4 is rotatably combined with the lid lever 3 with the notch portion 4a serving as a fulcrum, and the safety lever 4 is not rotated with respect to the rotation of the horizontal portion 3c. The horizontal portions 4e that overlap each other are combined so as to rotate together.

In this state, the hook 5a at the upper end of the spring 5 is inserted into the locking hole 4c, and the safety lever 4 integral with the lid lever 3 is inserted into the notch cavity 1c from above while the engagement recess of the lid lever 3 is inserted. 3d is locked to the locking projection 1a of the mounting base 1. In this state, the lid lever 3 is rotatably attached to the mounting base 1 with the engagement portion between the engagement recess 3d and the engagement protrusion 1a as a fulcrum.

Next, the hook 5b at the lower end of the spring 5 is hooked on the notch 1b. Thereby, the safety lever 4 is pressed against the lid lever 3 by the tension force of the spring 5 and the safety lever 4 is combined with the lid lever 3, and the end of the lid lever 3 is also mounted on the mounting base by the pressing force from the upper safety lever 4. 1 is attached to the mounting base 1 while being pressed to the side.

Then, the protrusion 6a formed on the unbalance detection arm 6 is inserted into the mounting hole 4d and mounted on the safety lever 4. To attach the unbalance detection arm 6 to the safety lever 4, the safety lever 4 is
May be performed at a stage before the combination.

Next, the operation will be described. When the lid 7 is closed, the horizontal locking portion 3a of the lid lever 3 is lifted by the lid 7, and the horizontal portion 3c moves the locking portion between the engaging recess 3d and the locking projection 1a against the tensile force of the spring 5. It pivots upward as a fulcrum.

As a result, the horizontal portion 4e of the safety lever 4 placed on the horizontal portion 3c also rotates upward integrally with the horizontal portion 3c, and the safety lever 4 is also lifted, and the pressing piece 4
The switch b is closed by pressing the contact point of the switch 2 vertically. Therefore, it is detected that the lid 7 is closed.

When the lid 7 is opened, the locking between the horizontal locking portion 3a of the lid lever 3 and the lid 7 is released,
The tensile force of the spring 5 is transmitted to the horizontal portion 3c via the horizontal portion 4e of the safety lever 4, and the lid lever 3 is pivoted downward about the engaging portion between the engaging concave portion 3d and the engaging protrusion 1a as a fulcrum. As a result, the pressing piece 4b of the safety lever 4 is separated from the contact point of the switch 2, and the switch 2 is opened, and it is detected that the lid 7 is opened.

When an unbalanced state occurs and the outer tub pushes the unbalance detection arm 6, which swings and displaces, the substantially C-shaped portion 4f of the safety lever 4 is pressed laterally,
As a result, the notch 4a pivots independently with respect to the lid lever 3 against the tensile force of the spring 5 with the location of the notch 4a as a fulcrum,
When the pressing piece 4d separates from the contact point of the switch 2, the switch 2 opens, and an unbalanced state is detected. (The position of the chain line in FIG. 1)

When the garment jumps out and comes into contact with the unbalance detection arm 6 and swings in the front-rear direction in FIG. 1, the horizontal portion 4e is pivoted around the notch 4a as shown in FIG. In this case, the switch piece 2 is rotated horizontally independently on the horizontal portion 3c. Also in this case, the switch piece 2 is opened by separating the pressing piece 4d from the contact point of the switch 2, and detects the jumping out of the clothes.

In this case, since the unbalance detection arm 6 is formed of a metal wire, even if the garment contacts the garment, the garment is hardly damaged.

[0038]

As described above, the lid switch of the fully automatic washing machine of the present invention is turned on / off by the lid lever that operates in conjunction with opening and closing of the lid, and is disposed so as to face the outer periphery of the washing tub. In the lid switch that also functions as an unbalance detection switch that is activated by the safety lever that is displaced by the abnormal vibration of the laundry and popping out of the laundry, the lid lever that combines the safety lever is freely rotatable on the mounting base on which the lid switch is mounted Engages, a spring is interposed between the mounting base and the safety lever, an unbalance detection arm is attached to the lower part of the safety lever, and the lid lever is rotated integrally with the safety lever by the pulling force of the spring. By configuring so that only the safety lever is rotated by the displacement of the balance detection arm, the lid lever and the safety lever can be integrated with only one spring. It is dynamic also It is also possible to rotate only the safety lever, the number of parts can be reduced, assembling steps can be reduced.

Second, since the engaging recess formed in the lid lever is rotatably engaged with the locking projection formed in the mounting base, the mounting of the lid lever to the mounting base can be easily performed without the need for screws or the like. .

Third, since the horizontal portion of the safety lever overlaps the horizontal portion of the lid lever and one end of the spring is fixed to the horizontal portion of the safety lever, when the lid is closed, the spring against the elasticity of the spring is closed. When the end of the lid lever is lifted up by the lid and the horizontal part rotates upward, the horizontal part of the safety lever that overlaps this horizontal part also rotates upward together and the safety lever presses the switch. When the switch is closed and the lid is opened, on the contrary, when the lid is unlocked by the lid, the locking of the safety lever by the lid lever is also released,
Since the safety lever is turned by the tensile force of the spring urging the safety lever downward to open the switch, the operation can be reliably performed with a simple structure.

Fourthly, the notch recess provided in the safety lever engages with the edge of the hole formed in the lid lever so as to be rotatable vertically and horizontally, and the pressing piece of the safety lever is exposed upward from the hole. By pulling out and engaging the lid switch, the safety lever pivots not only vertically but also horizontally with respect to the lid lever, even when the safety lever is pushed in the circumferential direction of the washing tub due to jumping out of clothes etc. With a simple structure, only the safety lever moves and the switch opens reliably.

Fifth, since the unbalance detection arm is formed of a metal wire bent in a U-shape, even if the protruding clothing comes into contact with the arm, the clothing is hardly damaged.

Sixth, since the mounting base is formed integrally with the top cover of the washing machine, it is not necessary to mount the mounting base with screws or the like, which further reduces the number of assembling steps and facilitates assembling.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of a lid switch of a fully automatic washing machine of the present invention.

FIG. 2 is an exploded perspective view showing an embodiment of a lid switch of the fully automatic washing machine of the present invention.

FIG. 3 is a plan view of an operation state showing an embodiment of a lid switch of the fully automatic washing machine of the present invention.

FIG. 4 is a vertical side view of a conventional lid switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Mounting stand 1a ... Locking protrusion 1b ... Notch 1c ... Notch void 1d ... Side wall 2 ... Switch 3 ... Lid lever 3a ... Horizontal locking part 3b ... Square hole 3c ... Horizontal part 3d ... Engaging recess 4 ... Safety lever 4a Notch 4b Pressing piece 4c Locking hole 4d Mounting hole 4e Horizontal part 4f Substantially C-shaped part 5 Spring 5a Hook part 5b Hook part 6 Unbalance detection arm 6a Projection Part 7 Lid 8 Top panel 10 Switch 11 Mounting base 12 Spring 13 Pressing piece 14 Safety lever 15 Spring 16 Lid 17 Lid lever 18 Spring

 ────────────────────────────────────────────────── ─── Continued from the front page (72) Inventor Junji Miyoshi 1-1-1 Yamate, Funabashi-shi, Chiba

Claims (6)

[Claims] 1. An arm which is turned on / off by a lid lever which operates in conjunction with opening and closing of a lid, is disposed to face the outer periphery of a washing tub, and is operated by a safety lever which is displaced by abnormal vibration during dehydration and popping out of laundry. In a lid switch also serving as a balance detection switch, a lid lever in which a safety lever is rotatably combined is rotatably mounted on a mounting base to which the lid switch is mounted, and a spring is interposed between the mounting base and the safety lever, An unbalance detection arm is attached to the lower portion of the safety lever, and the lid lever is rotated integrally with the safety lever by the pulling force of the spring, and only the safety lever is rotated by the displacement of the unbalance detection arm. Features a lid switch of a fully automatic washing machine. 2. The full-automatic washing machine lid switch according to claim 1, wherein an engagement recess formed in the lid lever is rotatably engaged with a locking projection formed on the mounting base. 3. The safety lever according to claim 1, wherein the horizontal portion of the safety lever overlaps the horizontal portion of the lid lever, and one end of a spring is fixed to the horizontal portion of the safety lever. Lid switch of fully automatic washing machine. 4. A notch recess provided in the safety lever is rotatably and vertically engaged with an edge of a hole formed in the lid lever, and a pressing piece of the safety lever projects upward from the hole. 4. The lid switch for a fully automatic washing machine according to claim 1, wherein the lid switch is engaged with the lid switch. 5. The lid switch of a fully automatic washing machine according to claim 1, wherein the unbalance detection arm is formed of a metal wire bent in a U-shape. 6. The lid switch according to claim 1, wherein the mounting base is formed integrally with the top cover of the washing machine.