JP2000149717A - Seesaw style electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seesaw style electronic component that can easily rockingly be installed on a board even if its key top is not journalled to another member formed in the vicinity of its outer periphery nor connected by a hinge, and can be miniaturized and thinned. SOLUTION: The vicinity of a rocking center axis of a key top 40 is fixed to a flexible mounting film 30, and the mounting film 30 is fixed to a membrane switch board 20 by the use of a mounting plate 10 and frame members 60, 60. A switch contact is turned on and off by rocking the key top 40 centering its rocking center axis by the bend of the mounting film 30. The vicinity of the rocking center axis of the key top 40 may be fixed directly to the membrane switch board 20 by omitting the mounting film 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seesaw type electronic component having a structure in which a predetermined electrical function unit such as a switch contact is operated by swinging a key top.

[0002]

2. Description of the Related Art Conventionally, seesaw switches that turn on and off switch contacts by swinging a key top have been used in various electronic devices. In this type of seesaw switch, further miniaturization and thinning are required in both the surface direction and the thickness direction due to the demand for miniaturization and thinning of electronic devices.

[0003]

By the way, a seesaw switch is used to swing a key top in a seesaw shape.
It is necessary to pivotally support the rotation shaft to another member (for example, a case for storing the key top) provided near the outer periphery of the key top. Further, when it is difficult to support the key, there is a structure in which the key top is connected to another member by a hinge, and the key top is swung by twisting the hinge.

[0004] However, when further miniaturization of the key top in the thickness direction and in the plane direction, particularly in the plane direction of the key top, is required, there is no space for mounting a pivoting mechanism and a hinge to the other members of the key top. However, there was a problem that the request could not be answered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to make it easy for a key top to be mounted on a substrate without being pivotally connected to another member provided near the outer periphery of the key top or by a hinge. It is an object of the present invention to provide a seesaw type electronic component which can be swingably mounted thereon and which can be reduced in size and thickness.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a structure for operating an electrical function section by swinging a key top disposed on a substrate about its swing center axis. In the seesaw-type electronic component, the key top is fixed to a flexible mounting film disposed between the substrate and the key top in the vicinity of the swing center axis, and the key top is bent by bending the mounting film. It is characterized by swinging about a swing center axis. The present invention also provides a seesaw electronic component having a structure in which a key top arranged on a substrate is swung about a center axis of the swing thereof to operate an electric function unit, wherein the substrate is formed of a flexible sheet. ,
The key top is characterized in that the vicinity of the swing center axis is fixed to the substrate, and the key top is swung about the swing center axis by bending the substrate. The present invention also provides
A switch contact is provided on the substrate at a position facing the pressing portion provided on the key top, and the switch contact is turned on and off by swinging the key top.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. [First Embodiment] FIG. 1 is an exploded perspective view of a seesaw type electronic component according to a first embodiment of the present invention. As shown in the figure, this seesaw type electronic component is configured by mounting a membrane switch board 20, a mounting film 30, a key top 40, and frame members 60, 60 on a mounting plate 10. Hereinafter, each component will be described.

The mounting plate 10 is formed by providing four mounting holes 11 around a hard rectangular metal plate.

As shown in an exploded perspective view of FIG. 2, the membrane switch substrate 20 has two flexible sheets 2.
1 and 23 are overlapped and integrated via a spacer layer 26 (not shown) (see FIG. 5) so that the contact patterns 22 and 24 provided on both sides face each other (switch contacts are formed by the contact patterns 22 and 24). A click plate 2 made of a dome-shaped elastic metal plate at a position directly above the two contact patterns 22 of the flexible sheet 21;
7, 27 are attached. A notch 25 is provided at a position corresponding to each mounting hole 11 provided on the mounting plate 10 on the outer periphery of both flexible sheets 21 and 23.

Next, the mounting film 30 shown in FIG. 1 is formed by forming various kinds of flexible synthetic resin films such as polyethylene terephthalate film into a substantially rectangular shape and providing a through hole 31 therein. I have. Here, the through hole 31 is formed by connecting the click plate through portions 31a, 31a having a circular shape on both sides thereof and having an inner diameter slightly larger than the outer diameter of the two click plates 27, 27 through the communication portion 31b. . Further, two tongue pieces 33, 33 are provided on the outer periphery of the mounting film 30. Mounting holes 35 penetrating through key top mounting portions 39 on both sides of the communication portion 31b at the center of the mounting film 30,
35, and two through-holes 37 are also provided in the two corners of the mounting film 30 and the tongue pieces 33, 33, respectively.

Next, as shown in FIG. 1 and FIG. 3, the key top 40 is an integrally molded product of a synthetic resin and has a rectangular base 41.
Are formed by projecting tongue-shaped arm portions 43 from both sides of the arm. An operation portion 45 projects from the upper surface of the base 41, and film storage recesses 47, 47 are provided on the left and right sides of the rear surface of the base 41, and mounting portions 49, 49 project into the film storage recesses 47, 47, respectively. Has been established.
A linear auxiliary protrusion 51 is provided on a line connecting the mounting portions 49 and 49. On the other hand, pressing portions 53, 53 are protrudingly provided on the back surfaces of the arm portions 43, 43, respectively.

Next, as shown in FIGS. 1 and 4, each of the frame members 60, 60 is an integrally molded product of a synthetic resin, each of which is formed in a substantially U-shape and provided with concave portions 61, 61 respectively. ing. The recesses 61, 61 are formed in dimensions that surround the outside of the arm portions 43, 43 of the key top 40.
Two mounting portions 63 are provided on the rear surface of the mounting plate 10 at positions corresponding to the mounting holes 11. Further, shallow notches 65, 65 are provided on both left and right sides of the concave portion 61 on the back surface of the frame member 60.

Next, to assemble the seesaw type electronic component, first, the key top 40 is placed on the mounting film 30 shown in FIG.
49 (refer to FIG. 3) are attached to the mounting holes 35 of the mounting film 30;
Then, the key top 40 is fixed to the mounting film 30 by heat caulking the ends of the mounting portions 49, 49. At this time, the auxiliary protrusion 51 enters into the communication portion 31b.

Then, the mounting film 30 on which the membrane switch board 20 and the key top 40 are mounted is mounted on the mounting plate 10, and the frame members 60, 60 are mounted thereon, and the four mounting portions 63 are mounted. Film 30-4
The seesaw-type electronic component is completed by inserting the four through holes 37 and the four notches 25 of the membrane switch board 20 into the four mounting holes 11 of the mounting plate 10 and thermally caulking the ends of the mounting portions 63. .

FIG. 5 is a schematic side sectional view of the seesaw type electronic component configured as described above. As shown in the figure, the membrane switch board 20 and the mounting film 30 are
It is sandwiched and fixed between the mounting plate 10 and the frame members 60, 60. Also, the key top 40 has its mounting portions 49, 4
9 is a key top mounting portion 39 of the mounting film 30.
It is attached by being fixed to. The mounting film 30 is fixed on the membrane switch substrate 20 by the frame members 60, 60.
The reference numerals 9 and 39 are not fixed by the frame members 60 and 60 but are pulled up from the membrane switch substrate 20 with a predetermined tension and attached to the key top 40.

Next, the operation of the seesaw type electronic component will be described. That is, for example, when the operation part 45 of the key top 40 is pressed in the direction of arrow A shown in FIG. 5, the key top 40 draws a line connecting the two mounting parts 49, 49 fixing the key top 40 to the mounting film 30. As shown in FIG. 6, the center part of the pivot is tilted as shown in FIG.
Turn on between 2 and 24. When the key top 40 is swung, the auxiliary projections 51 are simultaneously turned on the two click plates 27 and 2.
This is to prevent 7 from being pressed.

When the pressing of the key top 40 is released, the key top 40 is automatically returned to the original neutral position by the automatic restoring force of each member such as the click plate 27, and the switch contact composed of the contact patterns 22 and 24 is turned off. I do.

[Second Embodiment] FIG. 7 is an exploded perspective view of a seesaw type electronic component according to a second embodiment of the present invention.
This embodiment is different from the first embodiment in that the mounting film 30 in the first embodiment is omitted and the key top 40-2 is directly connected to the membrane switch board 20-2.
It is a point attached to.

That is, in this embodiment, the mounting holes 35-2 and 35-2 are provided directly on the membrane switch substrate 20-2, and the auxiliary projection 51-2 at the center of the lower surface of the key top 40-2 as shown in FIG. Two mounting holes 59-
2, 59-2, and a membrane switch substrate 20-2.
The key top 40-2 is placed on the top of the device, the screws 70-2, 70-2 are inserted into the mounting holes 35-2, 35-2 from the lower surface side of the membrane switch board 20-2, and the tip thereof is key-topped. After being screwed and fixed to the mounting holes 59-2, 59-2 of the 40-2, the membrane switch board 20- is fixed by the mounting plate 10-2 and the frame members 60-2, 60-2 as in the first embodiment. 2 is sandwiched and fixed. The mounting plate 10
-2 is provided with an opening 79 for allowing the head of the screw 70-2 to escape.

The operation section 45- of the key top 40-2
2, the membrane switch board 20-2 bends, and the key top 40-2 is replaced with screws 70-2, 70-2.
Swings around the axis fixed by the switch, and turns on and off the switch contacts as in the first embodiment.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and for example, the following various modifications are possible. In the above embodiment, the membrane switch substrate is used as the substrate, but the substrate may be a rigid substrate as long as the key top 40 is attached to the attachment film 30.
In that case, the mounting plate 10 is unnecessary. Also key top 4
When 0-2 is directly attached to the substrate, the substrate must be flexible, but is not limited to the structure of the membrane switch substrate having the above structure. It may have a simple structure. For example, a flexible substrate having a structure in which a circuit pattern is formed only on one flexible sheet (that is, in this case, a flexible substrate is constituted by only one sheet. The click plate 27 shown in FIG. 1 is used as a movable contact). And so on.

In the above embodiment, the switch contacts are turned on and off by using a swinging keytop. However, a device having an electrical function other than the on / off switch, such as a variable resistor, may be operated by swinging the keytop. In short, it is only necessary to provide an electrical function unit that can be operated by swinging the key top.

[0023]

As described above in detail, according to the present invention, the key top is pivotally supported on the mounting film mounted on the substrate or on the substrate itself. Even if the key top is not supported or connected by a hinge, the key top can be easily mounted on the board so as to be swingable, and the size and thickness of the key top can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a seesaw type electronic component according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the membrane switch substrate 20.

FIG. 3 is a perspective view of the key top 40 as viewed from the back side.

FIG. 4 is a perspective view of the frame members 60, 60 viewed from the back side.

FIG. 5 is a schematic side sectional view of a seesaw type electronic component.

FIG. 6 is an operation explanatory view of the seesaw type electronic component.

FIG. 7 is an exploded perspective view of a seesaw electronic component according to a second embodiment of the present invention.

FIG. 8 is a perspective view of the key top 40-2 viewed from the back side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mounting plate 20 Membrane switch board (substrate) 30 Mounting film 40 Key top 53, 53 Press part 60, 60 Frame member 20-2 Membrane switch board 40-2 Key top

Claims (3)

[Claims] 1. A see-saw electronic component having a structure in which a key top arranged on a substrate is swung about a center axis of swing thereof to operate an electric function unit, wherein the key top is a center of the swing. The vicinity of the shaft is fixed to a flexible mounting film disposed between the substrate and the key top, and the key top is swung about its swing center axis by bending the mounting film. Seesaw electronic components. 2. A seesaw type electronic component having a structure in which a key top arranged on a substrate is swung about a center axis of swing thereof to operate an electric function part, wherein the substrate is formed of a flexible sheet. A seesaw-type electronic component, wherein the key top is fixed to the substrate in the vicinity of a pivot center thereof, and the substrate is bent to swing the key top about the pivot center. 3. A switch contact is provided on the substrate at a position facing a pressing portion provided on the key top, and the switch contact is turned on / off by swinging the key top. Seesaw type electronic component as described.