JP3465572B2 - Sounder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sounder incorporated in various mobile communication terminals and used as a ringing tone.

[0002]

2. Description of the Related Art A conventional sounder will be described with reference to FIGS. FIG. 3 is a perspective view showing the appearance of the sounder, and FIG.
FIG. 3 is a sectional view of the same mounted state. According to the figure, 5 is a plate in which the center pole 2 is fitted, 1 is a ring-shaped magnet connected to the upper surface of the peripheral edge of this plate 5, 3
Is a coil fitted to the outer periphery of the center pole 2, 4 is a lead wire terminal formed on the same surface as the plate 5, 8 is an external lead terminal electrically connected to the lead wire terminal 4 through the plate 5, 13 Is a resin frame in which the outer peripheral surface of the magnet 1 coupled to the plate 5 is coupled, 14 is a diaphragm in which the outer peripheral portion is coupled to the upper surface of the magnet 1, and 6 is a resonance cover coupled to the upper portion of the resin frame 13. Further, the radiation sound guide 6a is provided on the side surface, and the air chamber 7 is formed on the diaphragm 14.

The external lead-out terminal 8 is soldered to the circuit board 9 for supplying an electric signal to the sounder, while the radiating sound guide 6a has airtightness / cushioning property having a hole previously attached to the cabinet 11 by adhesion. It is configured to be coupled to a sound output hole 12 provided in the cabinet 11 via a gasket 10 having a groove.

[0004]

However, in the above-mentioned conventional structure, when the sounder is mounted on the circuit board 9, the gasket 10 is mounted so as to rub against the surface of the sounder having the radiating sound guide 6a, and the frictional force 15 is applied. The position of the gasket 10 which is received and coupled to the radiation sound guide 6a of the sounder becomes unstable, and the gasket 10 blocks the radiation sound guide 6a, which causes a reduction in ringing sound.

It is an object of the present invention to solve the problems of the conventional sounder at the time of mounting, and to provide a sounder with high sound pressure and good mountability.

[0006]

In order to solve the above-mentioned problems, the sounder of the present invention has a positioning means which is provided integrally with the resonance cover which projects from the periphery of the radiating sound guide hole and is inserted into the gasket hole. It is possible to provide a sounder having good mountability, which prevents the gasket from being displaced by the positioning means when the sounder is mounted and blocks radiation sound conduction, and prevents reduction in ringing sound.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the sounder of the present invention includes a plate having a center pole having a coil arranged on the outer periphery in the center, and a resin frame arranged on the outer periphery of the plate. A magnet arranged on the resin frame, a diaphragm in which at least a part of the magnet is provided with a predetermined gap, a resonance cover mounted on the resin frame so as to cover the diaphragm, Radiation sound guide provided on the side of the resonance cover to guide the radiation sound to the outside, and sound emission provided on the cabinet
It is placed in the gap with the hole and connects the radiated sound guide and the sound output hole.
A gasket having a continuous hole, and a positioning means integrally provided on the resonance cover protruding from the periphery of the radiation guide hole and inserted into the hole of the gasket. The positioning is performed to prevent the gasket from being displaced during the mounting of the sounder to block the radiation conduction.

According to a second aspect of the present invention, the gasket according to the first aspect is press-fitted and held in the positioning means. Since the gasket can be press-fitted and held in the positioning means in advance, the circuit board It is possible to improve workability at the time of mounting on.

[0009]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the description, the same parts as those of the prior art will be denoted by the same reference numerals, and the description will be omitted.

FIG. 1 is an external perspective view of a sounder according to an embodiment of the present invention, and FIG. 2 is a sectional view for explaining the same mounting state. According to the figure, reference numeral 16 is a resonance cover coupled to the upper portion of the resin frame 13, and the radiation sound guide 16a is provided on the side surface.
Is provided to form an air chamber 17 on the vibration plate 14 and has a positioning means 16b including a cylindrical step portion projecting from the periphery of the radiation guide 16a. Reference numeral 10a is a gasket which is fitted and positioned in the positioning means 16b.

With the above structure, when mounting the sounder on the circuit board 9 or mounting the circuit board 9 on which the sounder has been mounted on the cabinet 11, the positioning means 16b enters into the hole of the gasket 10a and guides it. The gasket 10a having the same airtightness and cushioning property as that of 10 is prevented from being displaced by friction and blocking between the radiation guide 16a and the sound output hole 12 of the cabinet 11, and a good ringing sound can be obtained without variation. It is a thing.

In the above embodiment, the positioning means 1
Although 6b is a cylindrical step, the positioning means 16b is such that the gasket 10a has at least some elasticity.
It may be a simple tubular portion as long as it is thick enough to prevent an acoustic gap from protruding from the radiation guide 16a and the sound output hole 12 of the cabinet 11. Alternatively, a plurality of protrusions may be provided around the radiation guide 16a.

Although the gasket 10a may be attached to the cabinet 11 in advance, the radiation guide 16a may be press-fitted into the hole of the gasket 10a, and the workability of mounting is further improved.

Further, although the gasket 10a is illustrated as a ring-shaped one in the above embodiment, the gasket 10a may be mounted on the sounder so as to cover the sounder. In that case, the positioning means 16a is used as the gasket 1a.
The hole 0a is used only to prevent the displacement of the gasket 10a so that the hole 0a is reliably positioned between the radiation guide 16a and the sound output hole 12 of the cabinet 11, and the gasket 10a is also used.
The shape of can be enlarged and the workability of assembling is improved.

[0016]

As described above, according to the present invention, the sounder is provided with the positioning means which is provided integrally with the resonance cover which projects from the periphery of the hole of the radiation sound guide and is inserted into the hole of the gasket. It is possible to provide a sounder having good mountability, which prevents the gasket from being displaced and blocks the radiation sound conduction at the time of mounting, and prevents reduction in ringing sound.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a sounder of the present invention.

FIG. 2 is a sectional view showing a mounting state on the cabinet and the circuit board.

FIG. 3 is a perspective view of a conventional sounder.

FIG. 4 is a sectional view showing a mounting state on the cabinet and the circuit board.

[Explanation of symbols] 1 magnet 2 Center pole 3 coils 5 plates 10a gasket 11 cabinets 12 sound output holes 13 resin frame 14 diaphragm 16 resonance cover 16a radiation 16b Positioning means

Claims (2)

(57) [Claims] 1. A plate having a center pole having a coil arranged on the outer periphery in the center, a resin frame disposed on the outer periphery of the plate, a magnet disposed on the resin frame, and at least one of the magnets. A diaphragm whose portion is provided with a predetermined gap, a resonance cover mounted on the resin frame so as to cover the diaphragm, and a radiation sound provided on the side surface of the resonance cover for guiding to the outside. Radiated sound conduction and sound emission provided in the cabinet
It is placed in the gap with the hole and connects the radiated sound guide and the sound output hole.
A sounder comprising: a gasket having a continuous hole; and a positioning means that is integrally provided on the resonance cover and that projects from the periphery of the radiation guide hole and is inserted into the hole of the gasket. 2. The sounder according to claim 1, wherein the gasket is press-fitted and held in the positioning means.