JPS6025115Y2 - sound device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sounding device used in an alarm clock or the like.

Conventionally, sound generating devices for bass and treble sounds have been obtained by using diaphragms with different diameters.

For this reason, the seat to which the diaphragm is attached needs to correspond to the diameter of the diaphragm, and therefore several types of seats with different dimensions must be manufactured and prepared.

An object of the present invention is to provide a sounding device in which diaphragms of different sizes can be used in common with one type of seat.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In Figures 1 and 2, 1 is an alarm holder, and a yoke 2 with a cross-sectional shape is arranged in the central hollow part of the alarm holder, and a coil 3 is wound around the iron core 2a of the yoke. .

A magnet 4 is located on the outer periphery of the coil 3 and is held together with the yoke 2 within the alarm holder 1.

Reference numeral 5 denotes a horn cap having a sound emitting hole 5a attached to the alarm holder 1.

On the outer periphery of the upper surface of the alarm support 1, a plurality of steps (two steps in the drawing) of support portions 1a and 1b having different diameters are provided in a stepped manner.

It is possible to attach two types of diaphragms with different outer diameters to the support parts 1a and lb, and in the example shown in FIG. Installation.

A mass 7 is fixed to the center of the upper surface of the diaphragm 6.

The lower supporting portion 1b provides an optimum gap between the diaphragm 6 and the yoke 2, thereby allowing the diaphragm to vibrate efficiently.

In FIG. 3, a large-diameter diaphragm 6a is attached to the upper support portion 1a by being attracted by the magnet 4.

In the case of the diaphragm 6a, if a relatively wide gap may occur between the diaphragm 6a and the yoke 3, it is desirable to fix the mass 7a to the lower surface of the diaphragm 6a, that is, the surface facing the yoke 2.

Thereby, the gap between the mass 7a and the yoke 2 can be optimized.

If the mass is fixed to the bottom surface of the diaphragm, the gap between the diaphragm and the yoke 2 can be easily adjusted by changing the thickness of the mass. If one type of yoke is prepared, all can be shared.

Note that the shape of the yoke is not limited to the upper one.

As described above, according to the present invention, it is only necessary to provide a plurality of step-like support parts on the alarm seat according to the type of diaphragm. It can be shared by alarm holders.

Furthermore, by providing the mass of the diaphragm on the surface facing the yoke, one type of yoke can be used in common.

This makes it possible to simplify the number of parts of the sound generating device and improve productivity, which has a great practical effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a longitudinal sectional view, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 shows an example of attaching another diaphragm to the alarm seat. FIG. 1...Alarm sitting, la, lb...
Support part, 2...Yaw', 2a...Iron core part, 3.Bend/Coil, 5...Horn cap 1.6, 6a... Vibration plate, 7.7a...
·mass.

Claims (1)

[Scope of utility model registration request] In a sounding device comprising a yoke around which a coil is wound, and a diaphragm having an additional mass plate at the center of the yoke and disposed opposite to the yoke, an alarm seat supports the outer periphery of the diaphragm. A sounding device in which a plurality of support parts are formed in a step-like manner, and the step of each support part is set to be approximately equal to the thickness of the additional mass plate.