JPS5913674Y2 - Buzzer volume adjustment device - Google Patents

Description

[Detailed description of the invention] The present invention is a buzzer volume adjustment device that adjusts the volume of the buzzer in a device that has a built-in small buzzer for alarm indication. A sound insulating plate 3 is provided between the sound-producing surface E and the outer panel 1 having the sound-emitting hole A for emitting sound to the outside, and having a volume adjustment hole communicating between the sound-producing surface E and the outer panel 1. This relates to a sound volume adjustment device for a buzzer, in which the sound insulating plate is slidably pressed against the sounding surface E of the buzzer via a cushion plate 4 made of an elastic material.

In conventional products, the volume of the buzzer is adjusted by electrically changing the voltage applied to the buzzer.

For this reason, such conventional volume adjusting devices use variable resistors, which are expensive, and there is a problem in that changing the applied voltage causes not only the sound pressure but also the timbre to vary.

In addition, when adjusting the volume of the buzzer by mechanical means, in other words, in order to adjust the volume, there is a conventional example in which a blocking part is provided in the path of the buzzer sound, and the opening amount of the path of the buzzer sound is varied by this blocking part. In this case, there is a problem in that the sound leakage from the buzzer sound passage section and the cutoff section is significant, so that the sound emitted to the outside cannot be sufficiently suppressed, and the volume cannot be adjusted appropriately.

The present invention has been proposed in view of the above-mentioned points, and provides a volume adjustment device that can mechanically adjust the volume and vary the volume without changing the timbre, while also preventing sound leakage. The purpose is to

The third embodiment of this invention is explained based on the drawings.
As shown in the figure, the outer panel 1 is attached to the casing consisting of the upper lid 8 and lower lid 7.
is inset, and one side is exposed as an exterior surface.

In FIG. 1, an outer panel 1 is provided with a sound emission hole A for transmitting sound to the outside, a movement hole B for a volume adjustment knob, and a shaft hole C.

The sound emitting holes A are six arc-shaped holes on the right side of the shaft hole C, and the movement holes B are semicircular holes on the left side of the shaft hole C for moving the knob F.

A plastic shaft 6 is inserted into the shaft hole C, and is welded to the sound insulating plate 3 through the felt 2.

The felt 2 is a disk with a groove G so that the knob F from the sound insulating plate 3 comes out from the moving hole B, and the sound insulating plate 3 has a semicircular hole for volume adjustment and a knob formed by bending one end. There is an F.

The knob F protrudes several millimeters from the external surface through the moving hole B.

A cushion plate 4 made of an elastic material and having similar holes is attached to the sound insulating plate 3, and the cushion plate 4 is assembled with one side of the cushion plate 4 in contact with the sounding surface E of the buzzer 5.

The buzzer 5 is inserted between the bosses 7 in FIG.
It is pressed and fixed.

Since the center of the sound emitting hole of the buzzer coincides with the center of the shaft 6, the center of the sound emitting hole A, the center of the felt 2, the sound insulating plate 3, and the cushion plate 4 are coaxial.

This week, if you turn the knob F of the tone plate 3 to the forced position shown in Figure 1, the openings of the sound insulation plate 3 and cushion plate 4 will open the buzzer sound hole to the maximum, making the sound louder. can be adjusted because it becomes smaller.

Note that when turning the sound insulating plate, a knob or the like may be used to surround the sound insulating plate.

As described above, this invention uses a mechanical sound volume adjustment device instead of an electrical sound volume adjustment device, which eliminates the need for a volume adjustment circuit, resulting in lower costs than the conventional example. E and sound insulation board 3
Since the sound insulating plate 3 is in pressure contact with the sound insulating plate 3, the passage of sound is only through the opening, so there is no sound leakage and the sound volume adjustment by the sound insulating plate 3 can be performed with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the present invention, FIG. 2 is a plan view, and FIG. 3 is a side view. 1... Outer panel, 3... Sound insulation board, 4...
...Cushion board, 5...Buzzer, D...
... Sound emitting hole, A... Sound emitting hole, E...
Pronunciation.

Claims (1)

[Scope of utility model registration request] A sound insulating board that has a volume adjustment hole that communicates between the sounding surface and the outer panel, which communicates between the sounding surface of the buzzer and the outer panel with the sound emitting hole that emits the sound to the outside. A sound volume adjustment device for a buzzer in which the sound insulating plate is slidably pressed against the sounding surface of the buzzer through a cushion plate made of an elastic material.