JP2500177Y2 - Slide switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a slide switch used for a power window switch or the like for driving a motor of a power window of a vehicle in a forward direction and a reverse direction.

[Conventional technology]

Conventionally, a seesaw switch as shown in FIG. 6 has been used as a seesaw switch. In this switch, a switch knob 102 is rotatably held on the upper surface of a base 101, and a plunger 104 is elastically held below the switch knob 102 via a coil spring 103. A substantially V-shaped movable contact 105 is attached to.
Then, recesses are provided at both ends of the movable contact 105 at positions where they come into contact with the fixed contacts, and when the switch knob 102 is rotated, the movable contacts 105 are pressed and come into contact with the fixed contacts 106 and 107 provided at the corresponding positions. Thus, the contacts are opened and closed.

[Problems to be solved by the device]

However, in such a conventional seesaw switch, when the movable contact 105 comes into contact with the fixed contacts 106 and 107, the movable contact 10
Since 5 does not slide, there is a drawback that if the switching current is large, contact failure will occur easily when the contacts are welded or foreign matter is pinched. Further, the conventional slide switch has a drawback that the abrasion powder is easily dragged when the movable contact is moved, and the abrasion powder is carbonized by a work piece when the contact is opened and closed, and insulation failure is likely to occur.

The present invention has been made in view of the above problems of the conventional switch, and by combining a seesaw switch and a slide switch, a wiping operation is added when the movable contact of the seesaw switch is contacted, and such a problem occurs. A technical issue is to make a slide switch that can solve the above problem.

[Means for solving the problem]

The present invention covers the switch base and the switch base,
A switch cover that forms a switch case, a plunger that is held slidably in a predetermined direction inside the switch case, and a pair of contact points that are elastically held on the lower surface of the plunger and that are perpendicular to the sliding direction. A contact and first and second fixed contacts provided on the upper surface of the switch base and facing each other in parallel to the moving direction of the plunger;
A common fixed contact having an arcuate cross section which is mounted between the second fixed contacts at an angle with respect to the sliding direction of the plunger, and the movable contact is fixed to the common fixed contact by the sliding of the plunger. It is characterized in that the switch contact is changed over by contacting the contact.

[Action]

According to the present invention having such a feature, the first and second fixed contacts having the arc-shaped protrusions are provided on the upper surface of the switch base, and the common fixed contacts are inclined between them. The movable contact held on the lower surface of the plunger contacts the common fixed contact and either the first fixed contact or the second fixed contact. When the plunger slides in the specified direction, the contact position between the movable contact and the common fixed contact changes continuously.Therefore, when the contact position exceeds the center of the movable contact, the tilt direction of the movable contact reverses. , One end of the movable contact contacts the second or first fixed contact, and the contact is closed with the common fixed contact. Therefore, the wiping operation accompanying the sliding of the movable contact is performed.

[Effect of device]

Therefore, according to the present invention, in the middle of the movement of the plunger, there is a time zone in which only the common fixed contact is contacted, so that the generation of abrasion powder can be reduced. In addition, since the wiping operation, which is lacking in the conventional seesaw switch, is added, contact failure can be prevented even when foreign matter is caught between the fixed contact and the movable contact. Further, since the wiping operation is performed, there is an effect that the welding resistance can be improved even when the switching current is large. Further, in the present invention, it is possible to construct a small and inexpensive switch due to its simple structure.

[Explanation of Example]

FIG. 1 is an assembly configuration diagram of a slide switch according to an embodiment of the present invention, FIG. 2 is a partially cutaway elevation view, and FIGS.
The drawings are a sectional view taken along the line AA and a sectional view taken along the line BB, respectively. As shown in these figures, the slide switch according to the present embodiment has a switch base 1 having a partition plate 1a at the center. Fixed contacts 2a, 2b and 3a, 3b, which are first and second fixed contacts, are formed on the upper surface of the switch base 1 in parallel with the longitudinal direction of the switch along the side wall of the switch base by, for example, insert molding. . And fixed contacts 2a, 2b
Between the fixed contacts 3a and 3b, arc-shaped projections 4a and 4b are inclined from the longitudinal direction of the switch base 1 as shown in the figure,
That is, the fixed contacts 2a, 2b, 3a, 3b facing each other are formed so as not to be parallel or perpendicular to each other. These protrusions 4a, 4
Common fixed contacts 5a and 5b having an arc-shaped cross section are mounted on b. A cover 7 having rectangular openings 6a and 6b in the longitudinal direction is attached to the upper part of the switch base 1, and the switch base 1 and the cover 7 form a switch case. Plungers 8 and 9 are slidably held to the left and right of the partition plate 1a inside the switch case. The plungers 8 and 9 are arranged in the longitudinal direction of the switch base 1 (third arrows C and E).
The switch case is slidably held along the direction), and knobs 8a and 9a protruding from the openings 6a and 6b of the cover 7 are provided on the upper portion thereof. As shown in FIGS. 2 and 3, a cylindrical groove is formed vertically from below on the lower surface of the plungers 8 and 9, and the holding springs 10a, 10b and 11a, 1 are formed inside thereof.
1b is inserted. The movable contacts 12 and 13 are elastically held on the lower surfaces of the plungers 8 and 9 vertically to the fixed contacts 2a to 3b on the base 1, respectively. The movable contacts 12 and 13 are flat members as shown in the drawing, and the contact portions 12a and 12 are curved downward.
It has b and 13a, 13b. The movable contacts 12 and 13 are always in contact with the fixed contacts 5a and 5b, and one of the contact portions 12a, 12b or 13a and 13b is in contact with the fixed contact 2a or 2b, 3a or 3b to close the contact.

When the plungers 8 and 9 are in contact with the partition plate 1a, the switch knobs 8a and 9a project from the ends of the openings 6a and 6b as shown in FIGS. At this time, the movable contacts 12 and 13 are the common fixed contacts as shown in FIG.
Located on the partition plate 1a side of 5a, 5b, the movable contact 12 is inclined as shown in FIG. 4 so that its contact portion 12b becomes the fixed contact 2b, and the movable contact 13 also inclines so that its contact portion 13b becomes the fixed contact. Contact 3b. Therefore, common fixed contact 5a, fixed contact 2b, fixed contact 5
b and 3b are closed. Now, when the knob 8a of the plunger 8 is moved in the direction of arrow C in this state, it is shown in FIG.
As shown in the line sectional view, when the bottom surface of the movable contact 12 slides on the upper surface of the fixed contact 5a and passes through the central portion of the fixed contact 5a, the inclination direction changes, and the contact portion 12b of the movable contact 12 and the fixed contact 2b.
Are separated from each other and the contact portion 12a and the fixed contact 2a come into contact with each other. Therefore, the circuit of the fixed contacts 2a and 5a is closed. Similarly, when the knob 9a of the plunger 9 is moved in the direction of arrow E, when the bottom surface of the movable contact 13 slides on the common fixed contact 5b and passes through the central portion, its inclination changes, and the movable contact 13 is fixed to the contact portion 13a. The contact 3a comes into contact with the contact 3a. Therefore, with fixed contact 5b
The circuit with 3a will be closed.

As described above, in the present invention, the movable contact can be slid on the fixed contact by sliding the plunger, and the contact can be switched while performing the wiping operation. Therefore, in the middle zone of the movement of the plunger, the movable contact is in contact with the common fixed contact only, so that abrasion powder is less likely to occur and insulation deterioration is less likely to occur.

[Brief description of drawings]

FIG. 1 is an assembly configuration diagram of a slide switch according to an embodiment of the present invention, FIG. 2 is a partially cutaway top view of the slide switch according to this embodiment, and FIG. 3 is a sectional view taken along line AA of FIG.
FIG. 5 is a sectional view taken along the line BB, FIG. 5 is a sectional view taken along the line DD when the plunger 8 is moved in the direction of arrow C, and FIG. 6 is a sectional view showing an example of a conventional seesaw switch. 1 …… Switch base, 2a, 2b, 3a, 3b …… Fixed contact, 4a,
4b ... Protrusion, 5a, 5b ... Common fixed contact, 7 ... Cover,
8,9 …… Plunger, 12,13 …… Movable contact, 12a, 12b, 13a,
13b …… Contact part

Claims (1)

(57) [Scope of utility model registration request] 1. A switch base, a switch cover that covers the switch base and forms a switch case, a plunger that is slidably held in a predetermined direction in the switch case, and an elastic surface on the lower surface of the plunger. And a movable contact having a pair of contact portions held in a direction perpendicular to the sliding direction, and first and second positions provided on the upper surface of the switch base and facing each other in parallel to the moving direction of the plunger.
Fixed contact, and a common fixed contact having an arc-shaped cross section, which is mounted between the first and second fixed contacts at an angle from the sliding direction of the plunger,
And a slide switch configured to bring the movable contact into contact with the common fixed contact and the first or second fixed contact by sliding the plunger to switch the switch contact.