JPH09179563A - Electromagnetic sounding body - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a sound output (calling, home electric appliances, etc.
The present invention relates to an electromagnetic sounding body used as a notice, an alarm, etc.), and an object thereof is to provide an electromagnetic sounding body that can be automatically produced. SOLUTION: The electromagnetic type sounding body of the present invention comprises a terminal 8 continuously provided in a hoop shape, a resin casing including a resin bobbin 11b formed by molding the terminal 8 with a resin, and the terminal 8 described above. A coil 6 having both ends connected to terminal legs, a magnet 5 mounted on a plate 4 having a center pole mounted on the terminal 8, a diaphragm 3 arranged on the center pole, and a sound output hole 16.
And a resonance case 9a having

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic sounding body used for sound emission (calling, notification, alarm, etc.) in the fields of home appliances, office automation equipment, automobiles, watches and the like.

[0002]

2. Description of the Related Art In recent years, small and thin electromagnetic type sounding bodies which generate sound by vibrating acoustically have been attracting attention, and their structure has become complicated as the number of functions has increased.

Here, a conventional electromagnetic type sounding body mounted and used on a circuit board will be generally described with reference to the drawings.

FIGS. 6 and 7 show the structure of a conventional electromagnetic type sounding body. As shown in the figures, a center pole of the plate 23 is placed on a plate (yoke) 23 on which a magnet (permanent magnet) 25 is placed. Coil 24 centered around 23a
Are placed to form a field portion, and a diaphragm 21 and a suspension 22 having high magnetic permeability are provided through a narrow gap 27.
The vibrating plate 20 is made up of a support stepped portion at the upper portion of the frame 26 coupled to the field magnet portion, with its peripheral edge held.

In the above structure, the diaphragm 20 is preliminarily set in the plate 2 due to the DC magnetic field generated by the magnet 25.
3 is attracted to and supported by the coil 3, but when an AC signal is applied to the coil 24 through the terminal 31 coupled to the bottom of the frame 26, the AC magnetic flux generated thereby is superimposed on the DC magnetic field, and the frequency of the AC signal changes. Due to the alternating magnetic flux that changes accordingly, the generated attractive force of the plate 23 causes the diaphragm 20 to vibrate and generate sound. The generated sound is amplified by the cavity 28 in the resonance case 30 and is emitted to the outside through the sound emission hole 29.

[0006]

However, in the above-mentioned conventional electromagnetic type sounding body, it is difficult to handle because it has a large number of parts and is small, and it is not excellent in mass productivity.

The present invention solves such a conventional problem and provides an electromagnetic type sounding body which can cope with automation of a manufacturing process.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an electromagnetic sounding body of the present invention has a terminal consisting of a pair of terminal feet and terminals which are continuously provided in a hoop shape with a feed pitch hole. A resin casing formed by molding, and a plate having a center pole attached to the resin casing,
A coil whose both ends are connected to the terminal foot, a magnet mounted on a resin housing on which the plate is mounted, and a vibration arranged on the center pole driven by a field unit including the plate, the magnet and the coil. A board,
Since the diaphragm and the resonance case having the sound output hole covering the field part are formed, the resin casing is continuously formed on the terminal formed continuously in the hoop shape, and the magnet and the coil are formed on the resin casing. It is possible to provide an electromagnetic type sounding body that can be automatically produced and is configured by mounting a diaphragm, a resonance case, and the like.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is formed by resin-molding a terminal composed of a pair of terminal feet and terminals which are continuously provided in a hoop shape with feed pitch holes. A resin casing, a plate having a center pole attached to the resin casing, a coil having both ends connected to the terminal foot, a magnet attached to the resin casing having the plate attached, and the plate The diaphragm arranged in the center pole driven by the field portion composed of the magnet and the coil, and the resonance case having the sound emission hole covering the field portion and the field portion are formed into a continuous hoop shape. An electromagnetic type sounding body that can be automatically produced by continuously producing a resin casing on the terminal formed on the surface and mounting a magnet, a coil, a diaphragm, a resonance case, etc. on the resin casing. A.

An embodiment of the speaker of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is a plan view of an electromagnetic speaker according to an embodiment of the present invention, and FIG. 2 is a front sectional view taken along line A--O--B of FIG.
3 is a partially cutaway perspective view showing the internal structure, FIG. 4 is a plan view of a terminal which is the main part, and FIG. 5 is a side cross-sectional view illustrating a state in which a plate is mounted on the resin-molded terminal which is the main part. Is.

As shown in the figure, the diaphragm 3 is composed of a diaphragm 1 and a suspension 2, and its peripheral portion is fixed to the upper end of the internal partition wall of the first resin casing 9 having the resonance case 9a as an upper lid. Have been placed. A field unit 7 for driving the diaphragm 3 is composed of a plate 4, a magnet 5 and a coil 6, and the first resin casing 9 and the diaphragm via the lower surface of the diaphragm 3 and the gap 10. It is sealed in the inside surrounded by 3.

11b is a plate 4 and a terminal 8
The resin bobbin 11b has a ring-shaped stopper 11a at one end in contact with the tip of the center pole 14 of the plate 4 to form the second resin casing 11.

Further, the terminal 8 has a positive pole and a negative pole, respectively, and is therefore divided into two parts with a central hole in between.

Further, 12 and 13 are a pair of terminals for transmitting an input signal from the outside to the coil 6 provided by extending the terminal 8, and 12a and 13a are also provided integrally with the terminal 8. It is a pair of terminal legs for winding wires at both ends of the coil 6 at the beginning and end of winding.

That is, as shown in FIG.
After connecting the resin bobbin 11b provided in the central portion of the second resin casing 11 to the first, the winding start portion 6a of the coil 6 is first wound around the terminal foot 12a of the terminal 12, and the lower plate 4 is placed at the center. Resin bobbin 1 with center pole 14
The coil 6 is wound around 1b, and the winding end portion (not shown) of the coil 6 is wound around the other terminal foot 13a (not shown).

Next, by electrically connecting the terminal legs 12a and 13a, the winding start portion 6a and the winding end portion of the coil 6 respectively by laser soldering or the like, the winding process of the coil 6 to the soldering process are automatically performed. It is possible to do in.

Further, as shown in FIG. 4, if a large number of terminals 8 are connected by runners 17 in an annular shape (hoop shape), a continuous assembling and molding process can be performed, and the feed pitch holes 18 are used for each step. The position can also be easily set.

That is, as shown in FIG. 5, the resin bobbin 11b is continuously provided integrally with the terminal 8, the plate 4 is sequentially mounted, and consistent continuous automatic production is possible including subsequent assembly.

Furthermore, the first resin housing 9 can also completely seal the inside of the electromagnetic type sounding body by the molding method, does not require an adhesive, and can be acoustically applied to the circuit board. It is possible to provide an excellent electromagnetic type sounding body even when mounted.

As described above, in the electromagnetic sounding body of this embodiment, the resin bobbin 1 is attached to the terminal 8 formed in a hoop shape.
The resin casing 1b is provided by resin molding, and the plate 4 is attached to the resin casing, thereby making it possible to provide an electromagnetic sounding body that can be automatically produced.

[0022]

As described above, the electromagnetic sounding body of the present invention is
Providing an electromagnetic sounding body that can be automatically produced by continuously manufacturing a resin casing on a hoop-shaped terminal and mounting a magnet, coil, diaphragm, resonance case, etc. on it It is possible.

[Brief description of the drawings]

FIG. 1 is a plan view of an electromagnetic speaker according to an embodiment of the present invention.

FIG. 2 is a front sectional view taken along the line A-O-B in FIG.

FIG. 3 is a partially cutaway perspective view showing the internal structure.

FIG. 4 is a plan view of the terminal, which is the main part of the same.

FIG. 5 is a side sectional view for explaining a state in which a plate is mounted on a resin casing that constitutes a resin bobbin, which is a main part of the same.

FIG. 6 is a plan view of a conventional electromagnetic speaker.

FIG. 7 is a front sectional view of the same.

[Explanation of symbols]

 3 diaphragm 4 plate 5 magnet 6 coil 6a winding start portion 7 field part 8 terminal 9 first resin housing 9a resonance case 11 second resin housing 12, 13 terminal 12a, 13a terminal foot 16 sound output hole

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location G10K 9/12 G10K 9/12 A H04R 13/00 H04R 13/00 31/00 31/00 C ( 72) Inventor Kiyoji Hino 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Kazumi Hanyu, 1006 Kadoma, Kadoma City Osaka Prefecture 1006 Kadoma, Kadoma-shi, Fuchu Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A resin housing formed by resin-molding a terminal consisting of a pair of terminal legs continuously provided in a hoop shape with feed pitch holes, and a center mounted on the resin housing. A plate having a pole, a coil whose both ends are connected to the terminal foot, a magnet mounted on a resin housing on which the plate is mounted, and the center driven by a field unit including the plate, the magnet and the coil. An electromagnetic type sounding body comprising a diaphragm arranged on a pole and a resonance case having a sound emitting hole covering the diaphragm and the magnetic field portion.