JPH09147673A - Slide switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the sliding resistance so as to improve the operation feeling by providing power source contacts in parallel with each other in the sliding direction, and providing a means for hindering the dispersion of the wear-out powder due to the generation of arc between an earth contact and the power source contacts in both sides of the earth contact. SOLUTION: When a contact holder 18 positioned at a neutral position N is moved, for example, left, movable contacts 2, 3 are respectively separated from an earth contact 17 and a load contact 12 by an insulating space G and an insulating groove 14, and thereafter, between a load contact 11 and the power source contact 15 and between the load contact 12 and the earth contact 17 are bridged so as to normally rotate a motor or the like. When the holder 18 is returned right, at the time when the contact 3 achieves the groove 14, the circuit is opened so as to stop the motor. At this stage, an arc is generated and a part 12a is worn, but dispersion of the wear-out powder is hindered by a dispersion hindering groove 6, and while the wear-out powder is fallen into the groove 14 for elimination. Consequently, it is unnecessary to form a space G with a groove, in which the wear-out powder is to be fallen, and the sliding resistance is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide switch that opens and closes a load energization circuit by bridging fixed contacts with a movable contact that slides.

[0002]

2. Description of the Related Art In a slide switch that opens and closes an energizing circuit such as a power window motor of a vehicle to which a high load current is applied, contacts are worn by arc discharge generated during opening and closing. Then, this conductive wear powder is carried along with the sliding movement of the movable contact and diffuses, scraping the surface of the fixed contact to impair the durability of the slide switch, and adhering to the surface of the insulator between the fixed contacts for insulation. Spoil the sex. Therefore, as shown in FIG. 5, an insulating groove g is provided between the fixed contacts linearly arranged in a line, and the abrasion powder is dropped along with the sliding movement of the movable contact c to ensure the insulating property. .

[0003]

However, the sliding surface of the movable contact becomes uneven due to the groove, so that the sliding resistance is increased and the operation feeling is not smooth. Further, there is a demand for surely preventing the abrasion powder caused by the arc generated between the movable contact and the load contact from diffusing to the power supply contact and the ground contact. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a slide switch that prevents diffusion of abrasion powder, reduces sliding resistance, and improves operation feeling.

[0004]

The slide switch according to the present invention as set forth in claim 1 for achieving the above object,
In a slide switch that opens and closes a load energizing circuit by bridging fixed contacts with a movable contact that slides, a load contact arranged in parallel along a sliding direction and a power supply contact arranged along the load contact. A blocking means is provided between the movable contact and the load contact to prevent diffusion of wear powder due to an arc generated between the movable contact and the load contact, and a bridge is provided between each load contact, the power supply contact, and the ground contact. It is characterized in that two movable contacts are provided.

According to a second aspect of the present invention, there is provided the slide switch according to the first aspect, wherein the blocking means is formed by a groove formed along the load contact.

A slide switch according to a second aspect of the present invention is characterized in that, in the structure according to the first aspect, the blocking means is formed by a ridge formed along the load contact.

[0007]

According to the slide switch of the first aspect of the present invention, the load contacts arranged in parallel and the power contact and the ground contact are arranged along the load contacts.
Blocking means are provided in parallel between them. Therefore, the abrasion powder due to the arc generated between the movable contact and the load contact is prevented from diffusing to the power supply contact and the ground contact. And each load contact, power supply contact, and ground contact are bridged by two movable contacts,
The sliding direction of the movable contact switches the energizing direction of the energizing circuit of the load. Since the blocking means is provided between the load contact where the arc is generated, the power supply contact and the ground contact, it is possible to reliably prevent the abrasion powder from diffusing to the power supply contact and the ground contact. Further, since the load contact and the power supply contact and the ground contact are separated so as not to be in a straight line, it is not necessary to form a groove for dropping abrasion powder between the power supply contact and the ground contact where arc does not occur. Therefore, the sliding resistance of the movable contact is reduced and the operation feeling can be improved.

According to the slide switch of the second aspect, the abrasion powder is diffused to the power source contact and the earth contact side by dropping the abrasion powder into the groove formed along the load contact inside the load contact. Surely prevent.

Further, according to the slide switch of the third aspect of the present invention, the protrusions formed along the load contact inside the load contact prevent abrasion powder from passing over the power supply contact and the ground contact side. Surely prevent wear debris from spreading.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a plan view schematically showing a contact arrangement of a slide switch 1 according to the present invention, FIG. 2 is a sectional view of an insulator 4, FIG. 3 is a conduction circuit diagram of a power window motor M having the slide switch 1 interposed therebetween, FIG. 4 is a plan view schematically showing a modified example of the embodiment. As shown in FIG. 1, the load contacts 11 and 12 are parallel to each other along the sliding movement direction of the movable contacts 2 and 3, and the insulator 4
Are located in The load contacts 11 and 12 to which the power window motor M is connected have a planar shape of a rectangle, and the longitudinal direction thereof is aligned with the sliding movement direction. The load contacts 11 and 12 have a length dimension of approximately 1 with respect to each other.
/ 2 minutes The positions are shifted in the longitudinal direction. Further, the load contacts 11 and 12 are provided with insulating grooves 13 and 14 into which conductive wear powder caused by arc generation is dropped.

As shown in FIGS. 1 and 2A, inside the load contacts 11 and 12, diffusion preventing grooves 5 and 6 are formed along the load contacts 11 and 12, respectively. Inside the grooves 5 and 6, in parallel with the load contacts 11 and 12, the power contacts 15 and 16 and the ground contact 17 are linearly arranged in a line. The power contacts 15 and 16 are arranged corresponding to the left and right ends of the load contacts 11 and 12, respectively. Further, the ground contact 17 is formed to have a length of approximately 1/2 of the length of the load contacts 11 and 12, and the power contact 15 and
It is located between 16. An insulation gap G is provided between the power contacts 15 and 16 and the ground contact 17.
The movable contacts 2 and 3 are held by the contact holder 18 at right angles to the longitudinal direction. The contact holder 18
Is in the neutral position N (see FIG. 1), the movable contact 2 is connected to the left end of the ground contact 17 and the load contact 1.
1 and the movable contact 3 bridges the right end of the ground contact 17 and the load contact 12.

The operation of the slide switch 1 having the above structure is
Description will be made with reference to the energizing circuit of the power window motor M of FIG. When the contact holder 18 is slid to the left from the neutral position N, the movable contact 2 first passes through the left end of the ground contact 17 to cause the load contact 11 to move.
And the ground contact 17 are separated. At this time, the movable contact 3 is moved to the load contact 1 by the insulating groove 14 of the load contact 12.
2 and the earth contact 17 are separated. Then, the load contact 11 and the power contact 15 are bridged by the sliding movement of the movable contact 2 toward the left side full stroke position SL. The movable contact 3 also passes through the insulating groove 14 of the load contact 12, and the load contact 12 and the ground contact 17 are bridged. As a result, the energizing circuit of the power contact 15 → the load contact 11 → the power window motor M → the load contact 12 → the earth contact 17 is closed, and the power window motor M starts to rotate.

When the contact holder 18 is slid to the right and returned from the full stroke position SL to the neutral position N, the movable contact 3 first reaches the insulating groove 14 of the load contact 12, and the load contact 12 and the ground contact. When 17 is separated, the energizing circuit is opened and the power window motor M is stopped. At this time, an arc is generated between the movable contact 3 and the load contact 12. Due to this arc, the load contact 12 extends from the left end of the insulating groove 14 to the left side 12
a wears. The wear particles gradually fall into the insulating groove 14 as the movable contact 3 slides, and the load contact 12
Removed from the surface of the. At this time, the movable contact 2
Also passes through the right end of the power contact 15, and the load contact 11 and the power contact 15 are separated from each other. When the neutral position N is reached by sliding the contact holder 18 to the right, the movable contact 2 bridges the load contact 11 and the ground contact 17. The movable contact 3 also passes through the insulating groove 14 and bridges the load contact 12 and the ground contact 17.

The operation when the contact holder 18 is slid to the right from the neutral position N is substantially the same as the above case. When the full stroke position SR is reached by the rightward movement, the power contact 16 → the load contact 12 →
Power window motor M → load contact 11 → ground contact 1
The energizing circuit 7 is closed, and the power window motor M starts rotating in the opposite direction to the above. When moving from the full stroke position SR to the left and returning to the neutral position N, the movable contact 2 reaches the insulating groove 13 of the load contact 11, the load contact 11 and the ground contact 17 are separated from each other, and the energizing circuit is formed. Is opened and the power window motor M is stopped. At this time, an arc is generated between the movable contact 2 and the load contact 11. Due to this arc, the load contact 11 is abraded at the portion 11a extending from the right end of the insulating groove 13 to the right direction. The abrasion powder gradually falls into the insulating groove 13 as the movable contact 2 slides, and is removed from the surface of the load contact 11.

As described above, the load contacts 11 and 12 bridging the movable contacts 2 and 3, the power contacts 15 and 16 and the ground contact 17 are arranged in parallel, and the movable contacts 2 and 3 in which an arc is generated. Since the sliding line and the sliding line in which no arc is generated are separated from each other, the insulating gap G between the power contact 15 and the ground contact 17 and the insulating gap G between the ground contact 17 and the power contact 16 are worn. It is not necessary to form an insulating groove for dropping powder. Therefore, the sliding resistance of the movable contacts 2 and 3 can be reduced and the operation feeling can be improved. Furthermore, the load contact 11,
Grooves 5 and 6 are formed inside each of 12, and a power contact 15 and a ground contact 17 are arranged inside thereof.
Therefore, it is possible to reliably prevent the abrasion powder from diffusing to the power contact 15 and the ground contact 17 side. In place of the diffusion preventing grooves 5 and 6, as shown in FIG.
It is also possible to prevent the abrasion powder from passing over by providing 5, 26 to prevent the abrasion powder from diffusing to the power contact 15 and the ground contact 17 side.

FIG. 3 shows another contact structure which exhibits the same operation as that of the slide switch 1. Inside the load contact 11, a groove 5 for preventing diffusion is formed along the load contact 11. Inside the groove 5, the power source contact 15 and the load contact 11 are arranged in parallel with the load contact 11.
And a ground contact 27a having a length of about ½ are arranged in a line. The ground contact 27a corresponds to the right half of the load contact 11. Inside the load contact 12, a diffusion preventing groove 6 is formed along the load contact 12. Then, inside the groove 6, parallel to the load contact 12, a ground contact 27b having a length of approximately ½ of the load contact 12 is provided.
And the power contact 16 are arranged in a line. Earth contact 27
b corresponds to the left half of the load contact 12.

Between the earth contacts 27a and 27b,
A connecting portion 27c is provided in the central portion for connection. An insulation gap G is formed between the ground contacts 27a and 27b and the power contacts 15 and 16, respectively. Movable contacts 22, 2
3 is held by the contact holder 28. At the neutral position N of the contact holder 28, the movable contacts 22 and 23 are
It is located in the center of the left and right slide movement directions. At the neutral position N, the movable contact 22 bridges the load contact 11 and the ground contact 27a, and the movable contact 23 bridges the load contact 12 and the ground contact 27b.

The above-mentioned structure exhibits the same operation as the operation of the slide switch 1 shown in FIG. 1 by sliding to the left and right, and the energizing direction of the energizing circuit of the power window motor M can be switched. Also in this case, since the sliding line of the movable contacts 22 and 23 in which the arc is generated and the sliding line in which the arc is not generated are distinguished from each other, the insulation gap G between the power contact 15 and the ground contact 27a and the ground contact 27b. It is not necessary to form an insulating groove in the insulating gap G between the power contact 16 and the power contact 16. Further, since the grooves 5 and 6 are formed inside each of the load contacts 11 and 12, and the power contact 15 and the ground contact 17 are arranged inside thereof, the abrasion powder is provided on the power contact 15 and the ground contact 17 sides. Can be surely prevented from spreading. Further, the full stroke for sliding movement can be shortened to 2/3 as compared with that of FIG. 1, and the switch can be downsized. It is also possible to prevent the abrasion powder from passing over by providing a protrusion in place of the diffusion preventing grooves 5 and 6 so as to prevent the abrasion powder from diffusing to the power contact 15 and the earth contact 17 side. Also,
In each of the above embodiments, the power contact and the ground contact are arranged inside the load contact, but they may be arranged outside to form a groove or a ridge serving as a blocking means therebetween.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a contact arrangement of a slide switch 1 according to the present invention.

FIG. 2 is a cross-sectional view of an insulator 4.

FIG. 3 is an energization circuit diagram in which a slide switch 1 is interposed.

FIG. 4 is a plan view schematically showing a modified example of the embodiment.

FIG. 5 is a front view schematically showing a contact arrangement of a conventional slide switch.

[Explanation of symbols]

 1 ... Slide switch 2,3,22,23 ... Movable contact 5,6 ... Groove 11,12 ... Load contact 15,16 ... Power contact 17,27a, 27b ... Ground Contact points 25, 26 ...

Claims (3)

[Claims] 1. A slide switch that bridges fixed contacts with a movable contact that slides to open and close an energizing circuit of a load, wherein the load contacts are arranged in parallel along the sliding direction, and the load contacts are arranged along the load contacts. Between the arranged power contact and the ground contact, blocking means for blocking the diffusion of abrasion powder due to the arc generated between the movable contact and the load contact is provided, and each load contact, the power contact and the ground contact. A slide switch characterized by having two movable contacts that bridge the spaces between them. 2. The slide switch according to claim 1, wherein the blocking means comprises a groove formed along the load contact. 3. The slide switch according to claim 1, wherein the blocking means is constituted by a ridge formed along the load contact.