JP2964966B2 - Electromagnetic sounding body - Google Patents

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 (call, notice, alarm, etc.) in the fields of home electric appliances, OA equipment, automobiles, watches and the like.

[0002]

2. Description of the Related Art In recent years, a small and thin electromagnetic sounding body which generates sound in an acoustic vibration has attracted attention, and its structure has become more complicated as the number of functions increases.

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

FIGS. 6 and 7 show the configuration of a conventional electromagnetic sounding body. As shown in FIG. 6, a center pole of the plate 23 is placed on a plate (yoke) 23 on which a magnet (permanent magnet) 25 is mounted. Coil 24 around 23a
Are mounted to form a field portion, and a diaphragm 21 and a suspension 22 having high magnetic permeability through a narrow gap 27.
The diaphragm 20 is provided with a peripheral portion held at a supporting step portion above the frame 26 coupled to the field portion.

In the above configuration, the diaphragm 20 has a plate 2 in advance due to a DC magnetic field generated by the magnet 25.
3, when the 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 is reduced. Due to the alternating magnetic flux that changes accordingly, the diaphragm 20 vibrates due to the attraction force of the generated plate 23 and generates 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, the conventional electromagnetic sounding body described above has a large number of parts and is small in size, so that it is difficult to handle and is not excellent in mass productivity.

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

[0008]

In order to solve the above-mentioned problems, an electromagnetic sounding body according to the present invention is characterized in that a feed pitch hole is provided and a terminal comprising a pair of terminal feet and terminals provided continuously in a hoop shape is formed of resin. A resin housing configured by molding, a plate having a center pole attached to the resin housing,
A coil having both ends connected to the terminal feet, a magnet mounted on a resin housing on which the plate is mounted, and a vibration disposed on the center pole driven by a field unit including the plate, the magnet and the coil. Board and
Since the diaphragm and the resonance case having a sound emission hole covering the field portion are formed, a resin housing is continuously formed on a terminal formed continuously in a hoop shape, and a magnet and a coil are formed thereon. , A vibration plate, a resonance case, and the like can be provided, which can be automatically produced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is formed by resin-molding a terminal comprising a pair of terminal feet and terminals provided continuously in a hoop shape with a feed pitch hole. A resin housing, a plate having a center pole mounted on the resin housing, a coil having both ends connected to the terminal feet, a magnet mounted on the resin housing mounted with the plate, and the plate Since it is composed of a diaphragm arranged on the center pole driven by a field part composed of a magnet and a coil, and a resonance case having a sound emission hole covering the diaphragm and the field part, it is continuous in a hoop shape. A resin housing can be continuously manufactured in a terminal formed in the above, and a magnet, a coil, a diaphragm, a resonance case, etc. can be mounted thereon to provide an electromagnetic sounding body that can be automatically produced. A.

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

FIG. 1 is a plan view of an electromagnetic sounding body according to an embodiment of the present invention, FIG.
FIG. 3 is a partially cutaway perspective view showing the internal structure, FIG. 4 is a plan view of a terminal as the main part, and FIG. 5 is a side sectional view for explaining a state where a plate is mounted on a resin-molded terminal as the main part. It is.

As shown in the figure, the diaphragm 3 is composed of a diaphragm 1 and a suspension 2, and its peripheral edge is fixed to the upper end of an internal partition of a first resin housing 9 having a resonance case 9a as an upper lid. It is placed. Reference numeral 7 denotes a field part for driving the diaphragm 3, which is composed of a plate 4, a magnet 5, and a coil 6. The first resin housing 9 is connected to the lower surface of the diaphragm 3 via a gap 10. It is hermetically sealed inside 3.

Reference numeral 11b denotes a plate 4 and a terminal 8
The resin bobbin 11b is provided with a ring-shaped stopper 11a at one end of the plate 4 which is in contact with the tip of the center pole 14 to constitute a second resin housing 11.

The terminal 8 has positive and negative poles respectively, and is therefore divided into two parts with a central hole interposed therebetween.

Reference numerals 12 and 13 denote a pair of terminals for transmitting an external input signal 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 feet for winding the wires at both ends of the winding start and end of the coil 6, respectively.

That is, as shown in FIG.
After the resin bobbin 11b provided at the central portion of the second resin housing 11 is connected to the first terminal, 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 Resin bobbin 1 with center pole 14
The coil 6 is wound around 1b, and the end portion (not shown) of the coil 6 is wound around another terminal foot 13a (not shown).

Next, the terminal feet 12a, 13a and the winding start portion 6a and the winding end portion of the coil 6 are electrically connected to each other by laser soldering or the like, so that the steps from the winding step of the coil 6 to the soldering step are automatically performed. It is possible to do with.

Further, as shown in FIG. 4, if a large number of terminals 8 are connected to each other by a runner 17 to form an annular state (hoop shape), a continuous assembling and molding method can be performed. Can be easily set.

That is, as shown in FIG. 5, the resin bobbins 11b are continuously provided integrally with the terminal 8, and the plate 4 is sequentially mounted, so that the continuous automatic production can be performed consistently including the subsequent assembly.

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

As described above, the electromagnetic sounding body of the present embodiment has the resin bobbin 1 attached to the terminal 8 formed in a hoop shape.
A resin housing 1b is provided by resin molding, and a plate 4 is mounted on the resin housing, 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 has the following features.
Providing an electromagnetically soundable body that can be automatically produced by continuously manufacturing a resin casing on a hoop-shaped terminal and mounting a magnet, coil, diaphragm and resonance case on it You can do it.

[Brief description of the drawings]

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

FIG. 2 is a front sectional view along AOB of FIG. 1;

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

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

FIG. 5 is a cross-sectional side view illustrating a state where a plate is mounted on a resin housing constituting a resin bobbin as the main part.

FIG. 6 is a plan view of a conventional electromagnetic sounding body.

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

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04R 13/00 H04R 13/00 31/00 31/00 C (72) Inventor Seiji Hino 1006 Kazuma Kadoma, Kadoma City, Osaka Matsushita Electric Inside of Koki Sangyo Co., Ltd. (72) Inventor Kazumi Hanyu 1006, Kazuma Kadoma, Kadoma, Osaka Prefecture Inside of Matsushita Electric Industrial Co., Ltd. (56) References JP-A-64-12800 (JP, A) JP-A-1-233493 (JP, A) JP-A-62-65599 (JP, A) JP-A-63-204998 (JP, A) ( 58) Surveyed field (Int.Cl. ⁶ , DB name) G10K 9/13 101 G08B 23/00 520 G10K 9/12 H04R 13/00 H04R 31/00

Claims (1)

(57) [Claims] 1. A resin housing formed by resin-molding a terminal comprising a pair of terminal feet and terminals provided continuously in a hoop shape by providing a feed pitch hole, and a center mounted on the resin housing. A plate having a pole, a coil having both ends connected to the terminal feet, a magnet mounted on a resin housing on which the plate is mounted, and the center driven by a field unit including the plate, magnet and coil An electromagnetic sounding body comprising: a vibration plate disposed on a pole; and a resonance case having a sound emission hole that covers the vibration plate and the field portion.