JPH10208580A - Push switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it usable within a wide range of a current region and enable stable contact to be achieved during a long-duration use by bringing a pin energized upwardly by a spring and housed in a terminal plate into elastic contact with a lower face of a contact piece held swingably on a lower face of a sliding body and swinging the contact piece through sliding of the sliding body so as to be in contact with or distant from a fixed contact. SOLUTION: When an operation part 14A of a sliding body 14 is pressurized, the sliding body 14 slides in a case 3 while deflecting a spring 5. Next, when a protrusion 14D of the sliding body 14 holding a cut erection part 16C of a contact piece 16 exceeds a position of a pin 18, a position at which an elastic contact load is applied to the contact piece 16 of the pin 18 due to a spring 17 changes. The contact piece 16 swings with the cut erection part 16C engaged with the protrusion 14D being a fulcrum, and movable contacts 16A and 16B at the end of the contact piece 16 comes into contact with fixed contacts 2A and 2B. Thereby, electric connection between the fixed contacts 2A and 2B is performed via the contact piece 16, the contacts can be used within a wide range of a current region from several mA to several A and can be brought into stable contact with each other for long-period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push switch mainly used for equipment in a vehicle interior.

[0002]

2. Description of the Related Art FIG.
This will be described with reference to FIG.

FIGS. 8 (a) and 8 (b) are cross-sectional views illustrating the operation of a conventional push switch, and FIG. 9 is an exploded perspective view of the switch. In FIG. The terminal plate 3 provided with the fixed contacts 2 is a box-shaped case having a lower surface covering the upper surface of the terminal plate 1 and one side surface 3A opened, and 4 is slidably housed in the case 3 and a side surface of the case 3. A sliding member having an operation portion 4A protruding from 3A,
The rear projection 4B of the sliding body 4 and the inner projection 3 of the case 3
Between B, the spring 5 is held in a slightly bent state.

Reference numeral 6 denotes a contact piece made of an elastic metal thin plate having movable contacts 6A and 6B at the distal ends of the elastic legs.
The movable contacts 6A and 6B are elastically contacted with the upper surface of the terminal plate 1 by being held on the lower surface of the sliding body 4 by C and 6D, and the elastic legs are slightly bent.

In the above structure, when the operating portion 4A of the sliding member 4 is pressed from the state shown in FIG.
8 along with sliding inside the case 3 while bending
As shown in (b), the movable contacts 6A and 6B of the contact piece 6 held on the lower surface of the slide 4 elastically contact the fixed contacts 2A and 2B, respectively, so that the fixed contact 2A via the contact piece 6 is formed.
When the pressing force is removed, the sliding member 4 returns to the original state by the elastic return force of the spring 5, so that the movable contacts 6A and 6B of the contact piece 6 become fixed contacts 2A and 2B.
B and returns to the OFF state in FIG.

[0006]

However, in the above-described conventional push switch, the movable contact 6 of the contact piece 6 is not provided.
A and 6B need to be resiliently contacted on the fixed contact 2, so that the contact piece 6 needs to be elastic. For this reason, a thin elastic metal material is used. Has a cleaning effect of removing dust and foreign matter from the contact portion when it is used, but when it is used in a high current range of several A where an arc is generated when the contact portion is separated from the contact portion, this arc causes the elastic metal sheet to be removed. There is a problem that damage and wear of the contact piece 6 and the fixed contact 2 which are made of a metal are increased and sufficient contact reliability cannot be obtained.

The present invention solves such a conventional problem, and can be used in a wide current range from several mA to several A, and can obtain a stable contact even in long-term use. The purpose is to provide.

[0008]

In order to solve the above-mentioned problems, a push switch of the present invention holds a pin housed in a terminal plate which is urged upward by a spring and is swingably held on a lower surface of a sliding body. The contact piece is resiliently contacted with the lower surface of the contact piece, and the contact piece is swung by sliding of the sliding body to come into contact with and separate from the fixed contact.

Thus, it is possible to obtain a push switch which can be used in a wide range of current and can provide stable contact for a long time.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention provides a terminal plate having a plurality of fixed contacts on an upper surface, a box-shaped case having a lower surface covering the upper surface of the terminal plate and an open side surface, A sliding body which is slidably housed in the case and has an operating portion protruding from the side surface of the case, and a conductive metal contact piece whose upper surface swingably engages with a projection or recess on the lower surface of the sliding body. A push switch comprising a pin housed on the upper surface of the terminal plate and resiliently contacted with a lower surface of the contact piece by a spring and swinging the contact piece by sliding of a sliding body to make contact with and separate from the fixed contact; The contact piece made of thick conductive metal swings to contact and separate from the fixed contact, so that it can be used even in the high current area where arcing occurs, and the contact piece engaged with the sliding body can be used. Sliding on fixed contacts even after contact with fixed contacts Since it is configured, an effect that can be obtained push switch contact which also stable in long-term use by the cleaning effect can be obtained.

According to a second aspect of the present invention, in the first aspect of the present invention, both sides of the contact piece are engaged with both sides of the sliding member with play in the vertical direction. Since the engagement with the moving body can be performed temporarily at two locations, the contact piece can be prevented from dropping off from the sliding body at the time of assembling the switch, and the handling can be facilitated.

According to a third aspect of the present invention, in the first aspect of the present invention, a concave portion for guiding a pin is provided in a pin elastic contact portion on a lower surface of the contact piece in a sliding direction. By making the tip of the pin resiliently contact the pin, the pin surely resiliently contacts the center position of the contact piece.

An embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. The same components as those described in the section of the related art are denoted by the same reference numerals, and detailed description will be omitted.

(Embodiment 1) FIG. 1 is a sectional view of a push switch according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is an exploded perspective view of the sliding body and a contact piece, FIG.
Is a cross-sectional view for explaining the operation of the switch. In the figure, reference numeral 11 denotes a terminal plate provided with a plurality of fixed contacts 2 made of conductive metal on the upper surface, and 3 denotes a lower surface covering the upper surface of the terminal plate 11 and one side surface. A box-shaped case 3A is open, and 14 is a sliding body which is slidably housed in the case 3 and has an operating portion 14A protruding from a side surface 3A of the case 3, and a rear projecting portion 14B of the sliding body 14 The spring 5 is held between the inner side projections 3B of the case 3 in a slightly bent state.

A movable contact 16A is connected to one end of the movable contact 16A.
6B is a contact piece made of a conductive metal having a movable contact 16B.
A bent portion 16I is provided at an intermediate portion for abutting the A and 16B in parallel with the fixed contact 2 to make surface contact with the fixed contact 2.
When the pin 18 housed together with the spring 17 elastically contacts the lower surface of the central portion, the cut-and-raised portion 16C on the upper surface of the central portion swingably contacts the protrusion 14D of the sliding body 14.

In the above configuration, when the operating portion 14A of the slide 14 is pressed from the state shown in FIG.
The sliding portion 14 slides inside the case 3 while bending, and the protrusion 14D of the sliding body 14 holding the cut-and-raised portion 16C of the contact piece 16
, The contact piece 1 of the pin 18 by the spring 17
4 changes the position where the elastic contact load is applied to FIG.
As shown in (a), the contact piece 16 swings around the cut and raised portion 16C engaged with the projection 14D, and the movable contacts 16A and 16B at the end of the contact piece 16 contact the fixed contacts 2A and 2B. Thus, the electrical connection between the fixed contacts 2A and 2B via the contact pieces 16 is performed.

When the operating portion 14A is further pressed from the state shown in FIG. 4A, the sliding member 1 is pressed as shown in FIG.
4, the contact piece 16 in which the cut-and-raised portion 16C is engaged with the protruding portion 14D further moves.
6B is a fixed contact 2A while being in contact with the fixed contacts 2A and 2B.
When the pressing force is removed, the sliding member 14 returns to the original state by the elastic restoring force of the spring 5.
6, the movable contacts 16A and 16B separate from the fixed contacts 2A and 2B, and return to the OFF state in FIG.

As described above, according to the present embodiment, since the contact piece 16 does not require elasticity, a thick conductive metal material can be used, and the contact piece 16 having the movable contacts 16A and 16B can be used. By swinging, the fixed contacts 2A and 2A
B can be used in a wide current range from several mA to several A, and the protrusion 1 of the sliding body 14 can be used.
The contact piece 16 with which the cut-and-raised portion 16C is engaged with the 4D is a fixed contact 2
Since it is configured to slide on the fixed contact 2 even after contact with A and 2B, it is possible to obtain a push switch capable of obtaining stable contact even in long-term use.

(Embodiment 2) FIG. 5 is an exploded perspective view of a slide and a contact piece according to a second embodiment of the present invention, and FIG. 6 is a sectional view of the contact piece. A long hole 1 is formed in the rising portions 16J and 16K on the upper sides of both sides of the center of the hole 16.
6D and 16E are provided, and the elongated holes 16D and 16E are inserted into protruding shafts 14E and 14F provided on both side surfaces of the sliding body 14, and the recesses on the lower surface of the sliding body 14 are swingable with play in the vertical direction. It is stored in 14C.

A pin 1 is provided on the lower surface of the center of the contact piece 16.
8 is provided with a guide groove 16F in the sliding direction.
The tip of the pin 18 housed together with the spring 17 in the recess 11A (not shown) elastically contacts the lower surface of the guide groove 16F, so that the upper surface of the guide groove 16F contacts the protrusion 14D of the sliding member 14. .

In the above configuration, the operating section 1 of the sliding body 14
4A (not shown), the contact piece 16 swings as the sliding body 14 slides, and the movable contact 1 at the end of the contact piece 16
As in the first embodiment, the movable contacts 16A and 16B of the contact piece 16 slide on the fixed contact when 6A and 16B come into contact with the fixed contact and further press the operation portion 14A.

As described above, according to the present embodiment, the contact piece 16 is formed on the sliding member 14 by the long holes 16D and 16E on both sides.
The contact piece 16 can be temporarily held at two places on the sliding body 14 because the contact piece 16 is swingably engaged with play in the vertical direction, and the contact piece 16 drops off from the sliding body 14 when the switch is assembled. In addition, when the height of the movable contacts 16A and 16B at the end of the contact piece 16 and the height of the fixed contact vary, the contact piece 16 is inclined due to the play with the sliding body 14. Since the movable contacts 16A and 16B are evenly brought into contact with the fixed contact, stable contact between the contact piece 16 and the fixed contact can be obtained.

A guide groove 16F for the pin 18 is provided in the sliding direction of the lower surface of the central portion of the contact piece 16, and the guide groove 16F
By making the tip of the pin 18 elastically contact the lower surface of F,
Since the load of the spring 17 acts reliably on the center position of the contact piece 16 via the pin 18, the swinging operation of the contact piece 16 and the contact with the fixed contact can be ensured.

As shown in FIG. 7, notches 16G and 16H are provided on both sides of the center of the contact piece 16 to hold the contact piece 16 on the sliding body 14, and these are provided on both side faces of the sliding body 14. A similar effect can be obtained by a configuration in which the pawls 14G and 14H are swingably engaged with play in the vertical direction.

[0025]

As described above, according to the present invention, there is obtained an advantageous effect that it is possible to obtain a push switch which can be used in a wide range of electric current and can provide stable contact for a long time.

[Brief description of the drawings]

FIG. 1 is a sectional view of a push switch according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is an exploded perspective view of the sliding body and the contact piece.

FIG. 4 is a sectional view illustrating the operation of the switch.

FIG. 5 is an exploded perspective view of a slide and a contact piece according to a second embodiment of the present invention.

FIG. 6 is a sectional view of the contact piece.

FIG. 7 is an exploded perspective view of the sliding body and the contact piece.

FIG. 8 is a sectional view illustrating the operation of a conventional push switch.

FIG. 9 is an exploded perspective view of the switch.

[Explanation of symbols]

 2, 2A, 2B Fixed contact 3 Case 3A Side surface 3B Projection 5 Spring 11 Terminal plate 11A Depression 14 Sliding body 14A Operation portion 14B Projection 14C Depression 14D Projection 14E, 14F Projection shaft 14G, 14H Claw 16 Contact piece 16A, 16B Movable contact 16C Cut-and-raised part 16D, 16E Slot 16F Guide groove 16G, 16H Notch 17 Spring 18 Pin

Claims (3)

[Claims] 1. A terminal plate provided with a plurality of fixed contacts on an upper surface, a box-shaped case having a lower surface covering the upper surface of the terminal plate and an open side surface, and slidably housed in the case and protruding from a side surface of the case. A contact member made of a conductive metal having an upper surface swingably engaged with a protrusion or a depression on the lower surface of the sliding member, and a contact member housed on the upper surface of the terminal plate and having a spring. A push switch comprising a pin which resiliently contacts the lower surface and swings the contact piece by sliding of the sliding body to contact / separate from the fixed contact. 2. The push switch according to claim 1, wherein both sides of the contact piece are engaged with both sides of the sliding body with play in the vertical direction. 3. The push switch according to claim 1, wherein a pin guide groove is provided in a pin elastic contact portion on a lower surface of the contact piece in a sliding direction.