JP2576335Y2 - Leaf switch - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leaf switch utilizing the elasticity of a leaf spring.

[0002]

2. Description of the Related Art Conventionally, an on-off leaf switch is used in an operation unit of an electronic device such as a video tape recorder. Conventionally, a leaf switch of this type is configured such that two metal plates are fixed on a resin base so that they are elastically contacted with each other, and a circuit of a resin hard substrate in which both metal plates are separately provided by lead wires, respectively. The metal plate is connected by soldering, and a push rod for separating the elastic contact between the two metal plates is provided.

[0003]

However, in the above-mentioned conventional leaf switch, not only the number of parts is large but also the work of connecting the circuit pattern of the hard board and the metal plate with the lead by soldering is complicated. In addition, when the shape of the base on which the leaf switch is mounted is complicated, it is difficult to cope with this.

[0004] The present invention has been made in view of the above points, and can reduce the number of parts, facilitate the assembling work, and can easily cope with the complicated shape of the base on which the leaf switch is mounted. It is intended to provide a leaf switch.

[0005]

In order to solve the above-mentioned problems, a leaf switch 1 according to the present invention is provided with a circuit pattern on its surface and has two contact patterns 32, 3 at predetermined positions.
3 and the two contact patterns 32 disposed on the back side of the flexible substrate 3.
33, the two contact patterns 32, 33
And a base mounted on the flexible substrate 3 for holding an angle between the surfaces of the flexible substrate 3 at a predetermined angle.
41 and one contact pattern 3 of the flexible substrate 3
3 and is bent in a U-shape with the elastic contact plate 42
The bent portion is the other contact path of the flexible substrate 3.
An elastic contact plate 43 for elastic contact with the turn 32;
When mounting on the flexible substrate 3, the circuit
Insulation member (spacer) 3 for direct contact with pattern
7 on the flexible substrate 3
When mounting the portion 41 on the flexible substrate 3,
If not in direct contact with the circuit pattern of
Elasticity mounted on the flexible substrate 3 through the material
The metal plate 4 and the elastic contact plate 43 are disposed in the vicinity of the distal end of the elastic contact plate 43 bent in a U-shape and press the vicinity of the distal end to contact the other contact pattern 32 with the elastic contact plate 43. And a pressing member 5 that comes into contact with and separates from the pressing member.

[0006]

The contact pattern provided on the flexible substrate is provided.
The structure in which the elastic contact plates 42 and 43 provided on the elastic metal plate 4 directly turn on and off the space between the members 3 and 32 reduces the number of parts.
Further, the structure is simple and the size can be reduced.

Further, even when the shape of the base 2 on which the flexible substrate 3 is mounted is complicated, since the flexible substrate 3 is flexible and can be bent, it is easy to fix the flexible substrate 3 closely on the base 2. Can be done.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of the leaf switch 1 according to the present embodiment. As shown in FIG. 1, the leaf switch 1 has a flexible board 3 and an elastic metal plate 4 mounted and fixed on a base 2 made of synthetic resin, and a U-shaped elastic contact plate 43 provided on the elastic metal plate 4. The pressing member 5 is arranged at a position where the tip of the member is pressed. Hereinafter, each component will be described.

FIG. 2 is an exploded perspective view of the leaf switch 1 (however, the pressing member 5 is omitted).
As shown in the figure, the base 2 is integrally formed of synthetic resin, and its upper surface (flexible substrate support surface 21) is formed in a planar shape. On the flexible substrate support surface 21, a flat plate-like standing plate portion 22 is vertically set up. What
The standing plate portion 22 is a part of the base 2, and the base 2 is erected.
The concept includes a plate portion 22 and a locking claw portion 23 described below.
On the upper end side of the standing plate portion 22, an L-shaped locking claw portion 23 whose tip is directed downward is provided. Further, on the flexible substrate support surface 21, two projections 24, 24 for fixing the elastic metal plate 4 described below are provided.

Next, as shown in FIG. 2, the elastic metal plate 4 is
Two elastic contact plates 42 and 43 are provided on the outer periphery of a flat base 41. Here, the elastic contact plate 42 is one of the base portions 41.
A contact 42a protruding from the side and curving downward is provided at the tip thereof. The elastic contact plate 43 is the other one of the base 41.
First, the side is bent vertically upward, the tip is bent in a U-shape, and a contact 43a that curves outward is provided substantially at the center of the bent portion.
The vicinity of the bent end of the elastic contact plate 43 is a pressing portion 43b with which the front end of the pressing member 5 shown in FIG. Further, two through holes 44 are provided at predetermined positions on the base 41.

FIG. 3 shows the flexible substrate 3 shown in FIG.
FIG. 3 is an exploded perspective view of FIG. As shown in the drawing, the flexible substrate 3 is configured by placing a spacer 37 on the upper surface of a flexible substrate main body 31 having a predetermined circuit pattern provided on the surface thereof. Here, the flexible substrate body 31
Is located at a predetermined position on a flexible synthetic resin film.
One contact pattern 32, 33 is formed, and the contact pattern 32, 33 is connected to the conductive pattern 34, 3 respectively.
5. The conductive pattern 3
The reference numerals 4 and 35 are connected to other predetermined circuits (not shown) on the flexible substrate main body 31, respectively. Further, through holes 36, 36 through which the projections 24, 24 of the base 2 pass are provided at predetermined positions of the flexible substrate main body 31.

The spacer 37 is made of the same synthetic resin film as that of the flexible board main body 31. At a predetermined position, a notch 38 for exposing a contact pattern 33 provided on the flexible board main body 31 is provided. Are provided with through holes 39, 39 through which the projections 24, 24 are inserted. Then, by attaching the spacer 37 on the flexible substrate main body 31, the flexible substrate 3 as shown in FIG. 2 is completed. At this time, the contact pattern 33 is exposed from the notch 38 of the spacer 37 and the contact pattern 32
Are not covered by the spacer 37. This spacer 3
Numeral 7 is provided in order to prevent the elastic metal plate 4 mounted thereon and the circuit pattern on the flexible substrate main body 31 from directly contacting each other and conducting, and is unnecessary in some cases.

In order to assemble the leaf switch 1, as shown in FIG. 2, first, the flexible substrate 3 is placed on the flexible substrate supporting surface 21 on the base 2. At this time, the protrusions 24 provided on the flexible substrate support surface 21,
Numeral 24 penetrates through holes 36 and 39 provided in the flexible substrate 3, and the surface of the flexible substrate 3 on which the contact pattern 32 is provided is bent vertically upward and the back surface is an upright plate.
And the upper end side thereof is engaged with the locking claw portion 23.
Engages. The vertically bent portion of the flexible substrate 3 is formed by the two projections 24, 24 and the locking claw 2
It is fixed securely to the state by the 3 points 3.

Next, as shown in FIG. 2, an elastic metal plate 4 is placed on the flexible substrate 3. At this time, the projections 24, 2 of the base 2 are inserted into the through holes 44, 44 of the elastic metal plate 4.
The elastic metal plate 4 is securely fixed on the base 2 by penetrating the base 4 and by caulking the tips of the projections 24, 24. At this time, as shown in FIG. 1, the contact 42 a of the elastic contact plate 42 provided on the elastic metal plate 4 is elastically contacted with the contact pattern 33 provided on the flexible substrate 3, and the contact 4 a of the elastic contact plate 43
3 a is elastically contacted with the contact pattern 32.

As shown in FIG. 1, the pressing member 5 is disposed at a position where the pressing portion 43b provided on the elastic metal plate 4 is pressed. The pressing member 5 is configured to be movable in the direction of arrow A shown in FIG. Thus, the leaf switch 1 is completed.

Next, the operation of the leaf switch 1 will be described. The state shown in FIG. 1 shows two elastic contact plates 4 of the elastic metal plate 4.
It is a figure showing the state where contact patterns 42a and 43a of 2 and 43 contact two contact patterns 33 and 32, respectively. That is, at this time, the two contact patterns 33 and 32
The state is in the ON state.

Next, when the pressing portion 43b of the elastic metal plate 4 is pressed by the pressing member 5 shown in FIG. 1, the state shown in FIG.
Leave 2 That is, at this time, the space between the two contact patterns 32 and 33 is turned off.

In the above embodiment, the surfaces of the two contact patterns 32 and 33 provided on the flexible substrate 3 are supported by the base 2 so as to be vertical. Can be changed in any way by changing. That is, since the flexible substrate 3 is flexible and can be bent, the angle and shape of both can be easily changed only by changing the surface shape of the base 2 on which the flexible substrate 3 is mounted.

[0019]

As described in detail above, the leaf switch according to the present invention has the following excellent effects.

Since the contact pattern is formed on the flexible substrate as a part of the circuit pattern, and the elastic contact plate made of the elastic metal plate resiliently contacts the contact pattern, there is no need to solder the two with a lead wire or the like. . Further, only one elastic metal plate can be constituted. In other words, since the leaf switch can be configured by simply attaching one elastic metal plate on the flexible substrate, the number of parts is small, the assembling work is easy, the cost can be reduced, and the size can be reduced.

Even when the shape of the base on which the leaf switch is mounted is complicated, the flexible substrate mounted on the base is flexible and can be bent, so that the flexible substrate is closely attached to the base. It is easy to fix it.
That is, the leaf switch can be easily provided according to the base having a complicated shape.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a leaf switch 1 according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view of the leaf switch 1. FIG.

FIG. 3 is an exploded perspective view of the flexible substrate 3 shown in FIG.

FIG. 4 is a diagram for explaining the operation of the leaf switch 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leaf switch 2 Base 3 Flexible board 4 Elastic metal plate 5 Pressing member 32, 33 Contact pattern 42, 43 Elastic contact plate 42a, 43a Contact

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) H01H 13/02 H01H 13/10 H01H 13/52

Claims (1)

(57) [Scope of request for utility model registration] 1. A flexible substrate provided with two contact patterns of the circuit pattern is provided to the predetermined position on the surface, is arranged on the back side of the flexible substrate the two contact with the two contacts on the back surface of the contact pattern Pattern surface
A base for holding an angle between them at a predetermined angle, a base mounted on the flexible substrate, and the flexible
An elastic contact plate elastically contacting one of the contact patterns of the sibble substrate and U
And the bent part is the flexible part.
An elastic contact plate that elastically contacts other contact patterns of the
When mounting the base on the flexible substrate
When contacting the circuit pattern directly,
On the flexible board with the base in front
When mounting on a flexible board, the circuit pattern
If it does not come into direct contact with the
An elastic metal plate mounted on a flexible substrate; and an elastic metal plate, which is disposed near a tip of a U-shaped bent elastic contact plate of the elastic metal plate and presses the vicinity of the distal end to press the other contact pattern and the elastic contact plate. A leaf switch, comprising: a pressing member that contacts and separates contact.