JPH0720719Y2 - Small sound generator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a small-sized sounding device integrated into a stuffed toy or the like.

[Prior art]

In recent years, there is a great need to incorporate an electronic sounding device into toys such as stuffed animals. For this reason, a switch that has sufficient strength so that it will not break even if it is roughly handled by children, has a large operation surface, and has good operability is desired. The person is Jitsukai Sho 59-178759 and 17876
No. 0 specification proposes the tact switches shown in FIGS. 8 and 9, but since the touch plate 10 has a spherical shape, the pushing load is high, and there is variation in the height dimension of the surrounding collar portion 11 when processing the spherical shape. There is a large variation in the pushing load depending on whether the shape of the boundary between the spherical surface and the collar is bent linearly as shown in Fig. 10 (a) or curved as shown in (b). As shown in FIG. 11, there is a drawback that stress is generated on the spherical surface due to the strength with which the collar portion 11 is held by the touch plate case 6, resulting in a large variation in pushing load.

[Purpose of device]

In view of the above-mentioned drawbacks, the present invention has a touch plate of a tact switch as a flat surface and an elastic convex piece is provided on the periphery of the tact switch to form an unloaded gap to reduce a pushing load and a variation in the pushing load. In addition, it can be made into a small unit and has sufficient strength that it will not be broken even if a child handles it roughly,
The object of the present invention is to propose a small-sized sounding device which is incorporated in a stuffed toy or the like and has good switch operability and stable operation.

[Constitution of device]

According to the present invention, a stepped portion is provided on the outer circumference of a circular recess of a cover having a sound emission hole, and a thin sounding body such as a piezoelectric buzzer is placed on the cover. Of the circuit board that has a circular circuit board support formed on the back side of the holding plate and has a conductive touch plate whose one side surface is the operation surface and the other side surface is the switch operation surface. The circuit side is placed on the support part, and an annular touch plate case having a holding part for the circuit board is fitted to the holding plate or the cover to integrate the cover, the sounding body, the holding plate, the circuit board and the touch plate case, In a small-sized sounding device in which the circuit board and the circuit board are electrically connected to each other, the touch plate is made to be a flat surface, and elastic convex pieces are integrally formed on the periphery and bent in a direction to move on the board by pressing from the operation surface of the touch plate. Provided with the convex piece Lies in the formation of the gap at the factory.

〔Example〕

The present invention will be described below with reference to the illustrated embodiments. As shown in FIGS. 1 to 3, the small-sized sounding device is provided with a stepped portion 1b on the outer circumference of a circular recess 1a of a synthetic resin cover 1, and a thin sounding body 2 such as a piezoelectric buzzer is placed on the sounding body 2. An annular convex portion formed of a circumferential wall that rests the holding plate 3 and contacts the outer periphery of the sounding body 2.
3a is fitted to the cover 1 to hold down the sounding body 2, a circular stepped circuit board support portion 3b is formed on the back side of the holding plate 3, and the tact switch 4 is attached to the circuit board support portion 3b on the back side so that the outer shape is circular. The circuit side of the circuit board 5 is placed, and an annular synthetic resin touch plate case 6 is placed on the circuit board 5 and fitted onto the outer periphery of the holding plate 3, and the cover 1 and the touch plate case 6 are fixed by screws. .

Holding plate 3, tact switch 4,
The circuit board 5 is cut out by the amount corresponding to this stop portion.

A sound emitting hole 1c is formed at the center of the circular recess 1a of the cover 1, and four feet 1d are provided on the inside of the outer end surface of the cover 1 so that the sound emitting hole is closed even when incorporated in a stuffed toy or the like. Is configured to prevent

The tact switch 4 is composed of a fixed contact 4a fixed to the back side of the circuit board 5 and a conductive touch plate 4b fixed to the back side of the circuit board 5 with a gap. Touch board
4b, as shown in FIG. 4 and FIG. 5, the operation surface A is formed into a flat surface, and a plurality of convex fixing convex pieces 4c bent toward the circuit board 5 side and the circuit board 5 side And a plurality of elastic convex pieces 4d bent in a V shape, the convex pieces 4c and 4d form a gap between the no-load touch plate 4b and the fixed contact 4a. The fixed contact 4a and the convex piece 4c of the touch plate 4b are conductively connected to the circuit pattern of the circuit board 5, and substantially the entire back side of the circuit board 5 constitutes the tact switch 4. As shown in FIG. 1, a holder 9 of a battery 8 and an electronic component (not shown) are fixed to the circuit side of the circuit board 5, and the circuit board 5 and the sounding body 2 are connected by lead wires.

The ring-shaped touch plate case 6 presses the outer periphery of the circuit board 5 against the circuit board supporting portion 3b of the holding plate 3 by the pressing portion 6a of the inner plane, and serves as the operation surface A of the tact switch 4 with the large circular through hole 6b. 4b is exposed to the outside.

When the flat surface of the touch plate 4a on the operation surface A is pressed, the small sounding device operates so that the C-shaped elastic convex piece 4d opens, the touch plate 4d bends, and the inside of the touch plate 4b comes into contact with the fixed contact 4a. The switch 4 is turned on, a current flows through the electronic parts, and the melody or the like is sounded from the sounding body 2.

When the small-sized sound producing device is configured as described above, the touch panel 4b of the tact switch 4 has a flat operation surface A, and a plurality of convex fixed convex pieces 4c and a plurality of C-shaped elastic convex pieces 4d are provided on the periphery. Since it is formed, it is easy to manufacture, and the protruding pieces 4c and 4d are the circuit board 5.
Since it is mounted on, the gap at no load is surely maintained,
When the operation surface A is pressed, the V-shaped elastic convex piece 4d becomes the touch plate 4b.
Since it is moved and deformed on the circuit board 5 in accordance with the flexure, the pushing load is small, and even an infant can easily operate it. Furthermore, even if the touch plate 4b and the circuit board 5 are pressed by the touch plate case 6, no stress is generated on the plane of the operation surface A of the touch plate 4b, so that the pressing load does not increase, and the variation of the pressing load is small, and the operation surface is small. Is widely exposed to the outside through the large circular through hole 6b of the touch plate case 6 and is wide, so it is easy to operate the switch even if it is incorporated into a stuffed toy, etc., and the gaps under no load are secured by the convex pieces 4c, 4d. It is a compact sound generator equipped with a tact switch that can be turned on and off reliably. In addition, dust and the like do not enter the switch, the operation is stable, and the strength of the switch is large with respect to the pressing force. Further, since the cover 1, the sounding body 2, the holding plate 3, the circuit board 5, and the touch plate case 6 may be sequentially assembled, the assembling property is good, and the cover 1, the holding plate 3, and the touch plate case 6 are made of resin of their respective materials. As a result, the cover, sounding body, holding plate, circuit board, and touch plate case are integrated into a unit, so when incorporated into a stuffed toy, it does not require separate parts and has all the functions. Easy to assemble.

The pushing load of the touch plate 4b can be set to a desired pushing load by selecting the width and plate thickness of the V-shaped elastic convex piece 4d.

The cover 1, the holding plate 3, and the touch plate case 6 may be joined together by lightly press-fitting them depending on the application. Also cover 1
The touch plate case 6 and the touch plate case 6 may be directly fitted to each other.

Further, the foot 1d protruding from the cover 1 is unnecessary depending on the application.

In addition, the circuit board 5 and the sounding body 2 are omitted from soldering as coil springs instead of lead wires, soldering is omitted as coil springs, and the coil springs are used in a compressed state to be positioned in the holes of the holding plate 3 to prevent disengagement. Good.

6 and 7 show a second embodiment of the touch plate 4b, which is the operation surface A
Is formed on a plane, and a plurality of convex fixed convex pieces 4c and a plurality of elastic convex pieces 4e are bent and formed toward the circuit board side so that the no-load touch plate 4b and the fixed contact 4a have a convex piece 4c. , 4e form a gap.

Elastic projection piece placed on the back side of the circuit board when the operation surface A is pressed
4e is deformed to open outward in the radial direction, and touch plate 4b
The plane of the touch plate 4b is bent and the inside of the touch plate 4b is brought into contact with the fixed contact 4a. Although eight elastic convex pieces 4e are provided in FIG. 6, two elastic convex pieces 4e may be omitted.

The small-sized sound generator may be attached to something other than a plush toy.

[Effect of device]

Since the direction is configured as described above, it is easy to manufacture the touch plate, and the gap between the touch plate and the fixed contact is securely held by the convex piece when no load is applied, and when the operation surface is pressed, the convex piece is formed on the circuit board. Since the switch is turned on by moving it up and down, the on / off operation is surely done, and the pushing load is small, and it is easy to operate the switch even if it is incorporated into a stuffed toy, etc. and the pushing load is small. It is possible to provide a small-sized sound producing device that exerts the above effect.

[Brief description of drawings]

An embodiment of the present invention is shown in the drawings, FIG. 1 is a sectional side view of a small-sized sounding device, FIG. 2 is a bottom view of the same, FIG. 3 is an external perspective view, FIG. 4 is a plan view of a touch plate, and FIG. 5 is a perspective view of the same, FIG. 6 is a plan view of the second embodiment of the touch plate, FIG. 7 is a perspective view of the same, FIG. 8 and the following are explanatory views of a conventional example, and FIG. 8 is a spherical touch plate. -Shaped tactile switch cross-sectional side view, FIG. 9 is a plan view of the touch plate, FIG. 10 is an explanatory view of the boundary shape between the spherical surface and the flange portion of the touch plate, and FIG. 11 is a case where the flange portion of the touch plate is deformed. FIG. 3 is a cross-sectional side view of essential parts of the tact switch of FIG. 1 ... Cover, 1a ... Circular recess, 1b ... Step, 1C ... Sound emitting hole, 2 ... Sounder, 3 ... Holding plate, 3a ... Annular projection,
3b …… Circuit board support, 4 …… Tact switch, 4b ……
Touch plate, 4c, 4d, 4e, 4f ... convex piece, 5 ... circuit board,
6 ... Touch plate case, 6a ... Pressing part.

Claims (1)

[Scope of utility model registration request] 1. A cover having a sound emission hole is provided with a step on the outer periphery of a circular recess, and a thin sounding body such as a piezoelectric buzzer is placed on the cover, and a holding plate having an annular convex portion which contacts the outer circumference of the sounding body is fitted to the cover to generate sound. A circuit board that holds the body and forms a circular circuit board support on the back side of the holding plate, and has a tact switch with a conductive touch plate whose one side surface is the operation surface and the other side surface is the switch action surface on the back side. The circuit side of the above is placed on the support part, and the annular touch plate case having the holding part of the circuit board is fitted to the holding plate or the cover to integrate the cover, the sounding body, the holding plate, the circuit board and the touch plate case, and In a small-sized sounding device in which a body and a circuit board are electrically connected to each other, the touch plate is made to be a flat surface, and elastic convex pieces are integrally formed on the periphery and bent in a direction to move on the board by pressing from the operation surface of the touch plate. Provided with the convex piece Small sound generating device, characterized in that the formation of the gap under load.