JPH0431697Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a circuit board with a tact switch, in which a switch with a large operation surface is provided on the back side of the circuit board.

[Prior art]

Conventionally, the leaf switch system proposed by the present applicant in Utility Application No. 1988-6389 is the most common type of circuit board with a switch attached, and the present invention also includes a switch that can be operated by direct contact with the hand. The applicant proposed in the specification of Utility Model Application No. 1982-8269 that a separate member such as conductive rubber is placed opposite the circuit pattern and integrated through a case, or the rubber is attached.

However, when incorporating an electronic sound device having a switch using the electronic sound device constructed from the above-mentioned circuit board into a toy such as a stuffed animal, the switch operation part is small because the above proposed example is not intended for toys such as a stuffed animal. It has drawbacks such as poor operability when operated from the outside, easy malfunction due to misalignment of the contact piece during assembly, and large size and insufficient strength.

[Purpose of invention]

In view of the above-mentioned drawbacks, the present invention proposes a circuit board with a tact switch that can be made into a small unit by providing a tact switch on the back side of the circuit board, and which has good operability and stable operation even when incorporated into stuffed animals, etc. It is.

[Structure of the idea]

This invention attaches circuit components, etc. on one side of a board, fixed contacts on the back side, and a conductive touch plate that surrounds the fixed contacts with a convex curved part, and the convex curved part faces the fixed contacts,
The fixed contact and the touch plate are conductively connected to a circuit to form a tact switch, and the tact switch is arranged so as to occupy substantially the entire area on the back side of the substrate.

〔Example〕

Hereinafter, the present invention will be explained with reference to an illustrated embodiment. As shown in Figures 1 to 3, the circuit board with a tact switch has a circular circuit board 1, and a holder 3 for the battery 2 is placed on one side of the circuit pattern side, just like a normal circuit board.
Circuit components such as and electronic components 4 are fixed, and a tact switch 5 is provided on the back side.

The tact switch 5 has a fixed contact 5a fixed to the back side of the circuit board 1, and a convex curved part surrounding the fixed contact 5a, which becomes an operation surface A surrounding the fixed contact. and a conductive touch plate 5b. The fixed contact 5a and the conductive touch plate 5b are conductively connected to the circuit pattern of the circuit board 1, and the tactile switch 5 is integrated with the circuit board 1 to form a compact unit, and almost the entire area on the back side of the circuit board 1 is tactile. It has become a switch 5.

The tact switch 5 is turned on when the convex curved portion of the operating surface A is pressed toward the circuit board 1, and the inside of the conductive touch plate 5b comes into contact with the fixed contact 5a.

When the board with a tact switch is configured as described above, the tact switch 5 and the circuit board 1 are integrated, making it easy to handle, and since the operation surface A is on the back side of the circuit board 1, it is large regardless of the layout of the circuit components. Since it can occupy almost the entire area, it is easy to operate the switch, and the switch can be turned on reliably.
Since the fixed contact 5a is covered by the switch b, dust and the like do not enter the switch, the operation is stable, and the pushing force is absorbed by the circuit board 1, so that the switch has high strength against the pushing force.

4 and 5, an electronic sounding device is constructed of circuit components on a circuit board 1 and a thin sounding body 6 such as a piezoelectric buzzer, and this device is composed of a cover 7 made of synthetic resin and a holding plate 8.
In this application example, the operation surface A of the tactile switch 5 is housed in a case consisting of a tactile switch 5 and a tactile plate holder 9.
The convex curved portion of the conductive touch plate 5b is largely exposed to the outside through the large circular through hole 9a of the annular touch plate holder 9.

When the operating surface A is pressed in FIGS. 4 and 5 above, the inside of the conductive touch plate 5b comes into contact with the fixed contact 5a, turning on the tact switch 5, causing current to flow through the electronic component 4 and from the sounding body 6. A melody, etc. is pronounced.

When the above application example is assembled, the tactile switch 5 is integrated with the circuit board 1, so the cover 7, sounding body 6, holding plate 8, circuit board 1, and tactile plate holder 9 can be assembled in sequence, making assembly easier. The cover 7, retainer plate 8, and touch plate holder 6 are each made of resin and have high strength, and the cover, sounding body, retainer plate, circuit board, and touch plate holder are integrated into a unit. Since it has all functions, it is easy to assemble when incorporating it into a stuffed animal toy without the need for separate parts. In addition, the operation surface A of the tact switch 5 is largely exposed to the outside through the large circular through hole 9a of the tactile plate holder 9, making it easy to operate the switch even when incorporated into a stuffed animal toy, etc.
The on operation of the switch becomes reliable.

The above board with a tact switch may be housed in a case other than the application example and attached to something other than a stuffed toy.

[Effect of idea]

Since the present invention is constructed as described above, the tact switch and the circuit board are integrated into a compact unit, and the tact switch can be placed over almost the entire area behind the circuit board, making it possible to enlarge the operation surface. This makes it easy to operate the switch, the switch can be turned on reliably, dirt does not get inside the switch, the operation is stable, the switch is strong against pushing force, and it is easy to operate the switch when assembled into stuffed toys etc. Since the operation surface of the switch is large, it is possible to provide a board with a tact switch that has excellent practical effects such as being able to reliably operate the tact switch even from outside the stuffed animal toy.

[Brief explanation of drawings]

The drawings show an embodiment of the circuit board with a tact switch according to the present invention. Fig. 1 is a perspective view with a part of the conductive touch plate of the tact switch cut away, and Fig. 2 shows the main parts of the circuit board and the tact switch. 3 is a plan view showing the arrangement of electronic components on the circuit pattern side of the circuit board, FIG. 4 is a sectional side view of an applied example, and FIG. 5 is a perspective view thereof. 1... Circuit board, 5... Tact switch, 5a
... Fixed contact, 5b ... Conductive touch plate.

Claims (1)

[Scope of utility model registration request] Circuit components on one side of the board, fixed contacts on the back side,
The fixed contact is surrounded by a convex curved part, and a conductive touch plate is attached to the convex curved part facing the fixed contact, and the fixed contact and the touch plate are conductively connected to a circuit to form a tact switch, and the tact switch is A board with a tact switch arranged so as to occupy substantially the entire area on the back side of the board.