KR100676399B1 - Speaker - Google Patents

Abstract

The present invention relates to a speaker, and more particularly, to a speaker in which a diaphragm in which a coil and a lead wire separately wound by a single injection process are integrated is integrated with a frame.

The speaker of the present invention is completed by the combination of the vibration frame portion and the magnetic circuit portion composed of injection molding. The vibration frame portion is provided with a terminal 12 for soldering and connecting the outside and the voice coil 17, the lower portion of the vibration plate 20, the voice coil 17 is molded in the insert insert form, the vibration plate 20 in the center A plurality of straight body reinforcement ribs 16 are formed in the outward direction, and a lead wire of the voice coil 17 is molded into the ribs 16, and the magnetic circuit part has a yoke 11 at a lower end and an upper end thereof. Permanent magnet to which the plate is bonded is bonded to the upper center of the inside of the yoke, characterized in that the molded voice coil is located in the air gap formed on the outside of the plate and the inside of the yoke.

Speaker, frame, voice coil, diaphragm, body, edge

Description

Speaker {SPEAKER}             

1 is a schematic diagram showing the shape of a typical speaker unit

Figure 2 is a side cross-sectional view showing a diaphragm of a speaker according to the prior art.

3 is a block diagram of a magnetic speaker according to the present invention.

4 is a cross-sectional view of the magnetic speaker according to the present invention;

5 is a block diagram of an external magnetic speaker according to the present invention.

6 is a configuration of the diaphragm of the external speaker according to the present invention.

Figure 7 is a side cross-sectional view showing a diaphragm of the speaker according to the present invention.

Explanation of symbols on the main parts of the drawings

10: Speaker 11: lower frame

12: Terminal

14: Magnet 15: Upper plate

16: Coil lead-out mold part 17: Boy coil

18: upper frame 20: vibration plate

21: body 22: edge

The present invention relates to a speaker, and more particularly, to a speaker in which a diaphragm in which a coil and a lead wire separately wound by a single injection process are integrated is integrated with a frame.

The general function of a speaker is an electro-acoustic transducer that converts electrical input into sound that is vibration of air, and is largely classified into a speaker unit and a speaker system that is a collection of units.

A typical speaker unit is composed of a yoke and a plate made of ferromagnetic material, a vibrating portion composed of a magnetic circuit portion composed of a permanent magnet and a diaphragm portion bonded to a voice coil, and a frame portion supporting the vibrating portion and the magnetic circuit portion and determining the appearance of the speaker.
The magnetic circuit part has an air gap of a predetermined distance between the outer side of the plate located on the upper end of the permanent magnet and the inner side of the yoke, which is placed on the outer side of the permanent magnet, the permanent magnet in the air gap There is a static magnetic field generated at.
In addition, the voice coil is located at right angles in the air gap of the magnetic circuit so as not to contact the inside of the yoke and the outside of the plate.
When an electrical signal is applied to the voice coil, the electromagnetic force generated from the voice coil and the static magnetic field generated from the permanent magnet act at right angles to each other, and the excitation force is generated in a direction based on the left hand law of framing.
In the case of the conventional speaker unit, the magnetic circuit is fixed and the vibrating part is configured to be movable up and down, so that the excitation force generated in the coil vibrates the diaphragm bonded to the coil, which in turn leads to the vibration of the air to express audible sound.

In addition, the speaker system is configured for wideband sound reproduction that is difficult to express in one speaker unit using a plurality of speaker units.

delete

The speaker system is classified into a sealed type and a low sound reversal type according to the type of a housing in which the speaker unit is mounted.

delete

1 is a cross-sectional view of a conventional external magnetic dynamic speaker.
Since the structure is well known in the art, it will be omitted. Hereinafter, the speaker unit of the related art will be described.

The conventional speaker unit is again divided into a miniature speaker and a general speaker used in a small portable device, the present invention is intended for the application of a high-sound reproduction dedicated speaker for a system that is a miniature speaker and similar structures, the present invention below It will be described in detail.

delete

delete

delete

Usually, the diaphragm 100 of a conventional micro speaker is manufactured by heating and pressing a film having a uniform thickness, and thus, a portion of the central body 110 and an outer edge 120 for braking vibrations. The parts are integrally formed to equal thickness.

 The separately prepared voice coil is attached to the lower end of the diaphragm 100 formed integrally, and the remaining lead wire 140 of the wound voice coil is molded and attached to the edge 120 in the form of a natural arc to complete the vibration part.

For the completion of the vibrating unit for the coupling of the diaphragm and the voice coil and the coupling of the lead wire 140, each of the separate adhesive must be used and the entire process must be dependent on the manual work.

Small portable devices, which are becoming more and more versatile, are demanding more expanded sound reproduction. Therefore, the ultra-small speaker field also reduces broadband and reproducible inputs, and reduces component cost and manufacturing costs according to the mass production system of finished products. Is constantly being demanded.

However, in the case of the ultra-small speaker having a vibration unit composed of the film-integrated diaphragm of the prior art, as the electric input is increased, the bending vibration of the diaphragm itself increases, so that the sound quality deteriorates, and also with the voice coil which has to rely on the whole process manual operation There are many problems, such as the occurrence of excessive costs due to the manpower-intensive manufacturing method due to the joining process and the quality unevenness due to the fact that each part must be bonded using an adhesive.

In particular, the sound quality deterioration due to the increase of the electrical input and the reproduction sound expansion, in particular, the expansion of the reproduction soundness means the expansion of the bass region, which is an increase in the flexibility of the edge 120. In order to realize this, the thickness of the film material used should be thinner as it wants to expand into the bass region. In the case of the conventional micro speaker unit, the thickness of the film used for manufacturing the diaphragm is about 16um to 25um. As the reproducing sound is expanded, a material having a thickness of less than that should be used. However, as mentioned above, in the case of the diaphragm of the prior art, since the body 110 and the edge 120 are equal in thickness, the asymmetric vibration is particularly severe in the body 110 part. If you increase the electrical input at the same time, the sound quality deterioration becomes more and more, because the vibration displacement increases The likelihood of fatal defects due to progressive disconnection will also increase.

In addition, the marginal technology of the vibrating part manufacturing process, which must rely on the quality unevenness and manual process of the adhesive, is an urgent task that must be solved promptly in terms of quality and manufacturing cost.

delete

The present invention is to provide a novel micro-speaker with less distortion of the body 110, the non-adhesive, miniaturization in accordance with the miniature process for the purpose of improving or eliminating the above problems.

The present invention integrates the voice coil and the external terminal terminal and the diaphragm and the frame as a single injection process in which a voice coil and an external terminal terminal, to which the end of the lead wire is pre-bonded, are inserted into the lower end of the mold and the upper mold is combined. It is done.

The frame and the diaphragm according to the invention are further characterized as being formulated as a corresponding injection resin.

Injection materials for the implementation of the present invention include both engineering plastic series or NBR (natural rubber) or SBR (silicone rubber) or other injection moldable thermoplastic and thermosetting resins.

delete

Since the sound generating method of the present invention structure is the same as that of the conventional dynamic speaker, in describing the present invention, a detailed description of related known functions or configurations will be omitted in order not to obscure the gist of the present invention. Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram of a pre-bonded external terminal terminal and a voice coil according to the present invention, and a vibration frame part in which a frame and a diaphragm voice coil are integrated by one insert injection, and FIG. 4 is a vibration frame part. This is a cross-sectional view of a magneto-miniature speaker completed by combining a separate magnetic circuit. 5 is a configuration diagram of an external speaker according to the present invention, FIG. 6 is a plan view and a cross-sectional view of only the vibration unit according to the present invention, and FIG.

The present invention will be described with reference to FIGS. 3 and 4 as follows.

The speaker of the present invention is completed by the combination of the vibration frame portion and the magnetic circuit portion composed of injection molding. The vibration frame portion is provided with a terminal 12 for soldering and connecting the outside and the voice coil 17, the lower portion of the vibration plate 20, the voice coil 17 is molded in the insert insert form, the vibration plate 20 in the center A plurality of straight body reinforcement ribs 16 are formed in the outward direction, and a lead wire of the voice coil 17 is molded into the ribs 16, and the magnetic circuit part has a yoke 11 at a lower end and an upper end thereof. The permanent magnet to which the plate is bonded is bonded to the upper center of the inside of the yoke, and the molded voice coil is positioned inside the air gap formed at the outside of the plate and the inside of the yoke.

delete

The present invention molds the diaphragm 20 in which the voice coil 17 and the lead wire 19 wound by one injection process are integrated. In addition to the above, even the frame for determining the shape of the periphery forms a vibrating part of the integrated injection technique.

delete

delete

7 of the present invention, the diaphragm 20 of the speaker which vibrates by the voice coil to generate sound pressure is integrally formed with the body 21 of the inner center more thickly than the outer edge 22. In this case, the asymmetrical bending of the body is improved even when the broadband reproduction and the electrical input increase, which were a problem in the prior art, are prevented from deteriorating sound quality.

The diaphragm 20 and the frame are directly formed by a mold as a material used for injection.

5 and 6 illustrate an external speaker according to another embodiment of the present invention, in which a body 21 and an edge 22 are formed on the diaphragm 20.

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

The speaker according to the present invention can provide a novel speaker capable of completing the frame and the vibrating portion as one injection process without using an adhesive, and thus all the problems of the prior art are eliminated, and eco-friendly, micro process, It is possible to provide a high performance speaker unit capable of high reliability.

Claims (6)

When an electrical signal is applied to the voice coil, the electromagnetic force generated from the voice coil and the static magnetic field generated from the magnet act at right angles to generate excitation force, and thus the diaphragm fixed to the voice coil vibrates with respect to the frame. In addition, the vibration frame unit is provided with a terminal 12 for soldering and connecting the outside and the voice coil 17. A voice coil 17 is molded into an insert shape at the lower part of the vibration plate 20, and the center of the vibration plate 20. A plurality of straight body reinforcement ribs 16 are formed in the outward direction, and a lead wire of the voice coil 17 is molded into the ribs 16, and the magnetic circuit part has a yoke 11 at a lower end and an upper end thereof. Permanent magnets are bonded to the plate is bonded to the center of the upper end of the inside of the yoke, the molded beam in the air gap formed on the outside of the plate and the inside of the yoke Speaker, characterized in that is configured Scoring days position. The method of claim 1, The diaphragm 20 is a speaker, characterized in that the body portion 22 is formed in the center relatively thicker than the outer edge portion (21). The method of claim 2, The diaphragm 20 is a speaker, characterized in that made of a liquid polymer material is a thermoplastic resin such as silicone, rubber. The speaker 30 includes a yoke 32 inserted into the center of the lower frame 31, a magnet 33 seated and fixed to both sides of the upper surface of the yoke 32, and a seated fixed upper part of the magnet 33. Upper plate 34 and the diaphragm 20 fixed to the lower frame 31 so that the voice coil 35 is located in the outer air gap of the yoke 32 and the lower frame to be positioned above the diaphragm 20. And a plurality of curved coil lead-out mold portions 37 formed in a radial direction from the center as a thermoplastic resin on one surface of the upper frame 36 coupled to the diaphragm 20, and the diaphragm 20. ) And the voice coil (17) to be integrated into the speaker, characterized in that the diaphragm (20) and the upper and lower frames are integrated by injection molding. The method of claim 4, wherein The diaphragm 20 is a speaker, characterized in that the body portion 22 is formed in the center relatively thicker than the outer edge portion (21). The method of claim 5, The diaphragm 20 is a speaker, characterized in that made of a liquid polymer material is a thermoplastic resin such as silicone, rubber.

Images