JP2964965B2 - 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. The vibrating plate 20 vibrates due to the attraction force of the plate 23 generated due to the alternating magnetic flux that changes accordingly, and a sound is generated. 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 above-mentioned conventional electromagnetic sounding body 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 comprises a terminal comprising a pair of terminal feet and terminals provided continuously in a hoop shape by providing a feed pitch hole; A plate having a center pole, a resin housing formed by resin-molding the terminal and the plate, a coil having both ends connected to the terminal feet and arranged around the center pole, and the plate A resonance mounted on the center pole driven by a field part composed of the plate, the magnet and the coil; and a sound emission hole covering the diaphragm and the field part. Since it is composed of a case, a terminal and a plate formed continuously in a hoop shape are integrally and continuously formed in a resin housing, and a magnet, a coil, and a vibrator are formed thereon. Those capable of providing a configured automated production possible electromagnetic sounding body by mounting plate and resonance case or the like.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a terminal having a pair of terminal feet and terminals provided continuously in a hoop shape with a feed pitch hole, and a plate having a center pole. A resin housing formed by resin-molding the terminal and the plate, a coil having both ends connected to the terminal feet and arranged around the center pole, and a magnet mounted on the plate. The diaphragm, which is arranged on the center pole driven by the plate, the field part composed of the magnet and the coil, and the resonance case having a sound emission hole covering the diaphragm and the field part. , A terminal and a plate continuously formed in a hoop shape are integrally and continuously formed in a resin housing, and a magnet, a coil, a diaphragm, a resonance case, and the like are formed thereon. Those capable of providing a configured automated production possible electromagnetic sounding body and wear.

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 a main part, and FIG. 5 is a developed example showing integral molding of a terminal and a plate as a main part.

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 portion for driving the diaphragm 3, which is composed of a plate 4, a magnet 5, and a coil 6. The first resin housing 9 has a gap 10 with the lower surface of the diaphragm 3. And the inside is surrounded by the diaphragm 3.

11b is 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, and is therefore divided into two parts with a central hole interposed.

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 center of the second resin housing 11 is connected to the second resin housing 11, the winding start portion 6a of the coil 6 is first wound around the terminal foot 12a of the terminal 12, and the resin bobbin 1
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 poles 12a and 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, thereby forming the center pole 14a.
From the winding process of the coil 6 to the soldering process,
This can be done automatically.

Further, if a large number of terminals 8 are connected to each other by a runner 17 as shown in FIG. 4, a continuous assembling and molding method can be performed. Can also be easily performed.

That is, as shown in FIG. 5, the terminal 8 and the plate 4 are connected to the resin bobbin 11b and the stopper 11a.
At the same time, the second resin housing 11 is molded to enable consistent and continuous automatic production including subsequent assembly.

Further, the first resin housing 9 can also completely seal the inside of the electromagnetic sounding body by the 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.

[0022]

As described above, the electromagnetic sounding body of the present invention has the following features.
A terminal and plate formed continuously in a hoop shape are continuously and integrally formed in a resin housing, and a magnet, a coil, a diaphragm, a resonance case, and the like are mounted thereon, and an automatically-producible electromagnetic device. It can provide a type pronunciation body.

[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 side sectional view illustrating a molding state of the terminal and a plate.

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) Kaihei 2-55397 (JP, A) Japanese Utility Model Showa 55-60198 (JP, U) (58) Fields investigated (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 terminal comprising a pair of terminal feet and terminals provided continuously in a hoop shape with a feed pitch hole provided therein, a plate having a center pole, and a resin molded product of the terminal and the plate. Driven by a resin housing, a coil having both ends connected to the terminal feet, and arranged around the center pole, a magnet mounted on the plate, and a field part including the plate, magnet and coil An electromagnetic sounding body comprising: a vibration plate disposed on the center pole; and a resonance case having a sound emission hole that covers the vibration plate and the field portion.