KR19990036771A - switch - Google Patents

Abstract

Since the contact of the conventional switch portion 24a to the contact portions 22a and 23a is a butting type, there is almost no sliding operation between the contact portion 24a and the contact portions 22a and 23a. There is a problem that an oxide film of a contact due to an arc generated between the contact portion 24a and the contact portions 22a and 23a remains, causing contact failure.

According to the switch of the present invention, the movable contact 7 moves up and down in the axial direction of the support post 2b along the convex portion 2c of the case 1 by the movement of the push button 9 so that the fixed contact 4, ( 5), the oxide films of the contact portions 4a, 5a, and 7a caused by the arc generated at the time of contact switching can be removed by sliding the contact, so that a reliable contact can be provided. Can be.

Description

switch

The present invention relates to a preferred switch for use in a refrigerator or the like.

A conventional switch, for example, a switch for blinking an electric light that illuminates the refrigerator or turning the cooling motor ON and OFF, which is operated when the refrigerator door is opened or closed, has a case made of a molded article made of synthetic resin, as shown in FIG. 21, the case 21 is provided with two fixed contacts 22, 23 made of elastic metal plates and a common movable contact 24 made of elastic metal plates, and a common movable contact. The contact part 24a of the 24 is in the state which opposes the contact part 22a, 23a of the stationary contact 22, 23, and the contact part 24a is the contact part 22a, respectively. Connection separation is possible at 23a.

Moreover, in the case 21, it has the drive body 25 of the <shape fitted to the support | pillar 21a provided in the case 21, and this drive body 25 carries the support | pillar 21a. It is provided so as to be rotatable about the center and drives the movable contact 24 at one end of the drive body 25.

In addition, the case 21 is provided with a push button 26 capable of rotating movement with the shaft 26a as a point, and a coil spring 27 is provided between the case 21 and the push button 26. It is provided and elastically presses the pushbutton 26 by this coil spring 27 at all times.

Then, the push button 26 elastically presses the push button 26 in the counterclockwise direction with the shaft 26a as the point by the coil spring 27, and a part of the push button 26 is the case ( At the same time as protruding outward from the hole 21b of the 21, the convex portion 26b of the pushbutton 26 is caught inside the case 21, thereby preventing further rotational movement of the pushbutton 26. have.

Such a switch is provided in the refrigerator, and the push button 26 is operated by the opening / closing operation of the refrigerator door.

FIG. 10 shows a state where the refrigerator door is opened and a part of the push button 26 protrudes outward from the hole 21b of the case 21. In this state, the contact portion 24a of the movable contact 24 is closed. In contact with the contact portion 22a of the fixed contact 22, the movable contact 24 and the fixed contact 22 are turned on so that the lamp in the refrigerator is turned on or the cooling motor is turned off.

Then, the refrigerator door is closed in this state, and when the push button 26 is pushed in the direction of the arrow P from the door, the push button 26 resists the coil spring 27 and rotates clockwise with the shaft 26a as a point. Rotation, the pushbutton 26 is pushed into the case 21.

Then, the pusher 26 rotates the drive body 25 about the support post 21a, and the movable contact 24 moves by the rotational movement of the drive body 25, and the contact portion ( 24a is separated from the contact portion 22a and is in contact with the contact portion 23a of the fixed contact 23.

At this time, the contact of the contact portion 24a to the contact portion 23a is brought into abutment, that is, a butting contact state, and the lamp in the refrigerator is turned off or the cooling motor is connected.

In addition, when the door is opened in this state, the push button 26 is in a state where a part protrudes outward from the hole 21b by the coil spring 27, and at the same time, the movable contact ( 24 returns by its elasticity, thereby pushing the driving body 25, and the contact portion 24a is separated from the contact portion 23a so as to be buttered to the contact portion 22a of the fixed contact 22. In contact with the lamp, the lamp is turned on or the cooling motor is turned off.

The conventional switch requires the drive body 25 for driving the movable contact 24, the number of parts increases, it is expensive, and also requires a storage space, and there exists a problem of becoming large.

In addition, since the movable contact 24 is made of an elastic metal plate, the material cost is high and expensive, and the contact of the contact portion 24a to the contact portions 22a and 23a is a butting type, and the contact portion Since there is almost no sliding operation between the 24a and the contact portions 22a and 23a, the oxide film of the contact due to the arc generated between the contact portion 24a and the contact portions 22a and 23a remains. There is a problem of causing contact failure.

1 is a perspective view of a switch of the present invention.

2 is a cross-sectional top view of the main portion of the switch of the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along the line B-B in FIG. 2.

Fig. 5 is a sectional view showing the main parts of an installed state of a switch of the present invention.

Fig. 6 is a sectional view of the main portion for explaining the operation of the switch of the present invention;

7 is an explanatory diagram for explaining a switching operation of a contact point of a switch of the present invention;

8 is a perspective view showing another embodiment of the switch of the present invention;

Fig. 9 is a sectional view of principal parts showing still another embodiment of the switch of the present invention;

10 is a cross-sectional top view of a main portion of a conventional switch.

* Description of the symbols for the main parts of the drawings *

1: case 2: box body

2a: tube part 2b: prop

2c: convex portion 3: cover portion

4: fixed contact 4a: contact

4b: terminal 5: fixed contact

5a: contact portion 5b: terminal portion

6: common fixed contact 6a: terminal part

7: movable contact 7a: contact

7b: hole 7c: convex portion

7d: arm part 8: coil spring

8a: coil part 8b: end of coil part

8c: other end of coil section 9: push button

9a: latching portion 9b: recessed portion

10: spring 11: push button

11a: shaft 12: spring

A first solution for solving the above problems includes a case, a convex portion provided on the case, a fixed contact provided on the case, a movable contact rotatably supported by the support, and the support. And a push button for rotating the movable contact, wherein the movable contact contacts the convex portion during rotation of the movable contact by the movement of the push button, so that the contact portion of the movable contact is in the axial direction of the post. It was set as the structure which moves up and down by sliding contact with the said fixed contact.

In addition, as a second solution, a coil spring is provided on the support, the coil spring is pressed against the fixed contact with the coil spring, and the movable contact is caused by the elastic pressing of the coil spring. Therefore, it was set as the structure which enables a vertical movement.

In addition, as a third solution means, one end of the coil spring is caught by the movable contact, the other end is caught by the case, and elastically pressurizes the movable contact in the rotational direction around the support, The movable contact was configured to rotate in accordance with the movement.

Further, as a fourth solution means, the cover portion constituting a part of the case is elastically pressed to the upper portion of the coil spring, and the movable contact is elastically pressed to the lower portion of the coil spring.

1 to 9, FIG. 1 is a perspective view of a switch of the present invention, FIG. 2 is a cross-sectional top view of a main portion of the switch of the present invention, and FIG. 3 is a cross-sectional view taken along line AA of FIG. 2. 4 is a cross-sectional view taken along line BB of FIG. 2, FIG. 5 is a sectional view showing the main parts of the push button of the switch of the present invention, and FIG. 6 is a sectional view of the main view for explaining the operation of the switch of the present invention. 7 is explanatory drawing for demonstrating the switching operation | movement of the contact of the switch of this invention, FIG. 8 is a perspective view which shows another embodiment of the switch of this invention, FIG. 9 is a principal cross-sectional top view of the other embodiment of the switch of this invention.

1 to 7 show an embodiment of a switch of the present invention, for example, a switch used to turn on or off a cooling motor or to turn on or off a cooling motor that operates when a refrigerator door is opened or closed. In other words, the case 1 made of a molded article made of synthetic resin is composed of a box-shaped body 2 having a cavity therein and a lid portion 3 which blocks the cavity of the box-shaped body 2. (3) is combined with the box-shaped body 2 by fitting the arm part provided in the cover part 3 to the convex part of the box-shaped body 2. As shown in FIG.

In addition, the box-shaped body 2 includes a cylinder portion 2a, a support post 2b integrally provided with the box-shaped body 2 in the cavity portion, and a convex portion 2c provided in the bottom portion of the cavity portion. Equipped with.

Moreover, the fixed contacts 4 and 5 which consist of metal plates have the contact parts 4a and 5a and the terminal parts 4b and 5b, respectively, and are fixed to the box-shaped body 2, respectively.

Also. The common fixed contact 6 which consists of a metal plate and has the terminal part 6a is a state in which one part was fitted to the support post 2b (refer FIG. 3), and is respectively fixed to the box-shaped body 2.

Moreover, the movable contact 7 which consists of metal plates has the contact part 7a provided in the one end part, the hole 6b provided in the other end part, and the convex part 6c provided between the contact part 6a and the hole 6b. ) And an arm portion 6d formed by bending the side portion.

Then, the movable contact 7 is supported by the support 2b by inserting the support 2b into the hole 7b so as to be rotatably supported by the support 2b, and at the time of rotation of the movable contact 7, the convex portion 7c. When the abutment portion 2c of the box-shaped body 2 abuts and passes over this protrusion portion 2c, the contact portion 7a moves up and down in the axial direction of the support post 2b, and furthermore, The contact 7 can be disconnected from the contact portions 4a and 5a of the fixed contacts 4 and 5 in a state of always being in contact with the common fixed contact 6.

In addition, the coil spring 8 in the form of a coil is attached to the box-shaped body 2 by inserting the support post 2b in the center of the coil shaped section 8a, and one end 8b of the coil spring 8 is connected to the bottom of the movable contact 7. Engaged in the arm 7d, the other end 8c is in a state of being caught by a part of the box-shaped body 2.

Then, the movable contact 7 is always elastically pressed clockwise around the support post 2b by the coil spring 8, and the movable contact 7 is always pushed by the coil form 8a. It is elastically pressed by the common fixed contact 6, and the movable contact 7 and the fixed contact 6 are always in contact.

In addition, the coil spring 8 provided in the box-shaped body 2 burns the upper part of the coil-shaped part 8a with the cover part 3 when the cover part 3 is installed in the box-shaped body 2. By pressurizing sexually, the press of the movable contact 7 to the fixed contact 6 is strengthened, and the contact of both contacts is made more reliable.

Moreover, the push button 9 which consists of molded articles of synthetic resin has the latching part 9a formed in the one end part which provided the divided groove, and the recessed part 9b provided in the inside, and this pushbutton 9 is box-shaped. It snaps and stops by being fitted to the cylinder part 2a of the body 2, and it is installed so that it can move up and down with the cylinder part 2a as a guide, and the latching part 9a is caught by the box-shaped body 2, and a push button is pressed. The separation prevention in the case 1 of (9) is performed.

In addition, the coil-shaped spring 10 has one end inserted into the recessed portion 9b of the push button 9, the other end of which is caught by a part of the box-shaped body 2, and the push button 9 with the spring 10. Is always elastically pressed upwards.

The push button 9 is in contact with a part of the arm portion 7d of the movable contact 7 at all times to prevent further rotation of the movable contact 7, and the push button 9 ), The movable contact 7 is rotated so as to switch contacts.

Such a switch is provided in the refrigerator, and the push button 9 is operated by the opening / closing operation of the refrigerator door.

Next, referring to the operation of the switch of the present invention, FIG. 2 shows a state where the refrigerator door is opened and a part of the push button 9 protrudes outward from the tube portion 2bb of the case 1. In the state, the contact portion 7a of the movable contact 7 comes into contact with the contact portion 4a of the fixed contact 4, and the common fixed contact 6 and the fixed contact 4 are conducted so that the lamp in the refrigerator is turned on. The lighting or cooling motor is turned off.

Then, in the state of FIG. 2, the refrigerator door is closed, and when the push button 9 is pushed in the direction of the arrow P from the door, the push button 9 moves linearly in response to the spring 10. The push button 9 is pushed into the case 1 as well.

Then, the push contact 9 causes the movable contact 7 to rotate around the support post 2b against the elasticity of the coil spring 8.

And this movable contact 7 has the convex part 7c abuts on the convex part 2c of the case 1, and rides over the convex part 2c along the convex part 2c, and contacts the contact part 7a. ) Moves up and down, the contact portion 7a is separated from the contact portion 4a of the fixed contact 4 to contact the contact portion 5a of the fixed contact 5, and the fixed contact 6 and the fixed contact 5 This state is connected.

At this time, the lamp in the refrigerator is turned off or the cooling motor is connected.

In addition, as shown in FIG. 7 (A), the switch of the contact between the state of FIG. 2 and the state of FIG. 6 first conducts the movable contact 7 and the fixed contact 4 to conduct the movable contact. The convex part 7c of (7) and the convex part 2c of the case 1 are in the state separated.

And when the movable contact 7 rotates centering around the support | pillar 2b, as shown in FIG.7 (B), the contact part (a) until the convex part 7c hits the convex part 2c. 7a) rotates while contacting the contact portion 4a.

In addition, if the rotational movement of the movable contact 7 continues, as shown in FIG.7 (c), the convex part 7c will be mounted on the convex part 2c, and the contact part 7a will be the contact part 4a. ), And then, as shown in FIG. 7D, the convex portion 7c rides over the convex portion 2c and the contact portion 7a is in contact with the contact portion 5a. Becomes

Moreover, if the rotational movement of the movable contact 7 continues, as shown in FIG. 7E, the contact part 7a will move while sliding to the contact part 5a, and the convex part 7c will be convex part. The contact is switched so as to fall from 2c.

In addition, when the door is opened in the state of FIG. 6, the push button 9 is in a state in which a part protrudes outwardly from the case 1 as shown in FIG. (7) is returned by the coil spring (8), whereby the contact portion (7a) is separated from the contact portion (5a) to contact the contact portion (4a) of the fixed contact (4), the fixed contact (6) And the fixed contact point 4 are connected, and the lamp is turned on or the cooling motor is turned off.

The switching of the contacts in the meantime is the operation opposite to that described above, that is, the operation of Fig. 7A to Fig. 7A, and the switching of the contacts is performed.

8 and 9 show another embodiment of the switch of the present invention, and this embodiment is provided with the shaft 11a of the push button 11 in the case 1 and centered on the shaft 11a. And the pushbutton 11 is rotatably installed, the pushbutton 11 is brought into contact with the movable contact 7, and the spring 12 is provided in the case 1 to provide a spring 12. One end of the push button 11 is always configured to elastically press upwards.

In addition, since the other structure is the same as that of the said Example, the same number is attached | subjected to the same component, and description is abbreviate | omitted here.

In this embodiment, when the push button 11 is pressed in the direction of the arrow P in FIG. 9, the push button 11 is rotated about the shaft 11a against the spring 12, and the case ( 1) push into

Then, since the contact is switched by the same operation as the above-described embodiment, the description is omitted here.

In the switch of the present invention, the movable contact 7 moves up and down in the axial direction of the support post 2b along the convex portion 2c of the case 1 by the movement of the push button 9 so that the fixed contact 4, ( 5), the oxide films of the contact portions 4a, 5a, and 7a caused by the arc generated at the time of contact switching can be removed by sliding the contact, so that a reliable contact can be provided. Can be.

Further, by bringing the push button 9 into direct contact with the movable contact 7, the conventional drive body 25 becomes unnecessary, and a compact switch can be provided at a low price.

In addition, since the movable contact 7 does not need to be manufactured from the elastic metal plate like the conventional one, it is possible to provide a low-cost switch.

In addition, since the movable contact 7 is elastically pressed against the fixed contact 6 by the coil spring 8 provided on the support 2c, the contact between the movable contact 7 and the fixed contact 6 is prevented. It is possible to provide a switch that is secure and stable in connection.

In addition, since the movable contact 7 is elastically pressed in the rotational direction by the coil spring 8, the coil spring 8 is pressed against the fixed contact 6 of the movable contact 7 and the movable contact 7 It is possible to provide a switch having both high elasticity in the rotational direction in the rotational direction, a low number of parts and a good productivity at a low price.

In addition, since the coil spring 8 is elastically pressed by the cover part 3, the movable contact 7 can be pressed more firmly against the stationary contact 6, and the contact of the contact can be more surely provided. Can be.

Claims (4)

A case, a convex portion provided in the case, A fixed contact installed in the case, A movable contact rotatably supported by a prop, It is provided with a push button for rotating the movable contact around the support, During the rotational movement of the movable contact by the movement of the push button, the movable contact abuts the convex portion so that the contact portion of the movable contact moves up and down in the axial direction of the support so as to make sliding contact with the fixed contact. Switch made. The coil spring is provided in the support, and the coil spring is pressed against the fixed contact with the coil spring, and the movable contact is vertically moved along the convex portion by elastic pressing of the coil spring. A switch for enabling movement. 3. The method of claim 2, wherein one end of the coil spring is caught by the movable contact, the other end is caught by the case, and elastically presses the movable contact in a rotational direction about the support, and moves the pushbutton. Switch for the movable contact to rotate. 4. The switch according to claim 3, wherein an upper portion of the coil spring is elastically pressurized by a cover part which constitutes a part of the case, and the movable contact is elastically pressurized by a lower portion of the coil spring.