KR100635833B1 - Bone conductive speaker - Google Patents

Abstract

A bond conduction speaker is provided to adjust the properties widely by enlarging the size of voice coil, and to facilitate the control of strength according to the size of magnet. In a bond conduction speaker, a yoke(20) is installed inside a housing. The yoke(20) has surfaces(30,31') enlarged to four directions. Voice coils(40) and a center electrode(50) are formed in the middle of the yoke(20). A vibration plate(70) is attached on a piece of flat metal(60) by two nuts(80). The piece of a flat metal(60) is mounted on the yoke(20) by two nuts(80). A permanent magnet(90) is attached on the top of the metal flat piece(60). Two folding units facing top direction are formed in both ends of the yoke(20).

Description

Bone Conduction Speaker {BONE CONDUCTIVE SPEAKER}

1 is an exploded perspective view of the present invention.

2 is a longitudinal sectional view of the present invention;

Figure 3 is a longitudinal cross-sectional view of the present invention coupled to the case.

Figure 4 is a longitudinal sectional view showing another embodiment of the present invention.

5 and 6 are a plan view of another embodiment of the present invention.

7 is a plan view illustrating a conventional embodiment.

           <Description of the code | symbol about the principal part of drawing>

10: housing

20: York

30 30 ': Extension surface

40: voice coil

50: central stimulation

60: iron piece

70: diaphragm

90: permanent magnet

100: upward bending part

The present invention relates to a bone conduction speaker that can recognize and recognize a voice signal through vibration of a vibrator on the head bone of the human body.

In more detail, the bone conduction speaker of the structure coupled to the headband used in the call center, walkie-talkie, etc., which requires a call while listening to the hearing aids and surroundings used by the hearing impaired people of occupational and elderly hearing loss is air by the diaphragm Rather than generating and transmitting sound waves by vibrating, instead of converting them into sound vibrations by vibrators and transmitting them by direct contact with objects, it vibrates bones, that is, bones in the head of the human body, and detects these vibrations in the auditory nerve. That is, the sound wave is transmitted to the auditory nerve of the human body by the vibration of the bones rather than speech recognition by the vibration of the eardrum.

The bone conduction speaker for this purpose has been invented by Japanese Patent No. 2,777,777, and the pre-invention includes a central magnetic pole 2 and a voice coil (2) in the yoke (1) having an extended surface in four directions as illustrated in FIG. 3) and the magnets 5 and 5 'of the rectangular parallelepiped are installed in the magnet mounting portions 4 and 4' at positions opposite to each other. The main purpose of the present invention was to provide a bone conduction speaker capable of increasing the diameter and increasing the number of turns of the voice coil (3), thereby increasing the sound transmission effect and reducing the size of the appearance.

However, in the structure of the above invention, the manufacturing process has to be inconvenient to install two magnets of the rectangular parallelepiped on both sides, which is a factor to weaken the productivity, and there is an uneconomical increase in manufacturing cost due to the installation of two magnets. In addition, as the magnets are installed at opposite positions when assembling the product, the orientation of the magnets must be precisely adjusted so that the characteristics of the magnets are not degraded. Was inherent.

The present invention has been made in view of the above problems, in the configuration of the bone conduction speaker, without having to install the magnet close to the voice coil, there is no hassle to adjust the direction of the magnet to the structure to install a single magnet on the top of the iron piece, The size of the voice coil can be enlarged to increase the adjustment range of the characteristics, and to provide a bone conduction speaker that can easily adjust the strength according to the change in the size of the magnet and have a small size and a light weight. There is a purpose.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 1 shows an exploded perspective view of the present invention, Figure 2 shows a longitudinal cross-sectional view of the present invention.

Extension surfaces 30 and 30 'are formed on the yoke 20 accommodated and installed in the housing 10 in four directions, thereby forming the voice coil 40 and the central magnetic pole 50, and the iron piece 60 on the upper portion. In fixing the diaphragm 70 with) to the screw 80,

The present invention is to attach a permanent magnet 90 to the central portion of the iron piece (60).

And the present invention may have a sense of stability by having both ends of the yoke (20) up bending portion 100, depending on the circumstances required.

The shape of the permanent magnet 90 may be a variety of shapes, such as circular to square.

In another embodiment of the present invention, two or three voice coils 40 installed in the yoke 20 may be configured to form a plurality of central magnetic poles 50.

In the present invention as described above, the voice current is generated by the voice signal in the voice coil 40 and the magnetic force of the N pole and the S pole is generated in the central pole 50 while the suction force according to the change of the polarity by the permanent magnet 90. And the repulsive force acts alternately with each other to vibrate the diaphragm 70 and the vibration is transmitted to the head bone through the skin, this vibration wavelength is to be able to sense the voice signal by stimulating the auditory nerve of the human body.

And the present invention can be used to configure both ends of the yoke 20 to the upper bent portion 100 in order to give a sense of stability in use.

In the present invention, since the permanent magnet 90 is installed at the upper portion of the diaphragm 70, it can be used regardless of the shape of the magnet and can be assembled regardless of the size of the magnet.

As described above, the present invention requires a permanent magnet as one unit part in manufacturing a bone conduction speaker, and there is no need to precisely orient the magnet, and the assembling process is also very simple. Since the magnet is not located on the outer circumferential surface of the voice coil, it is located on the upper part of the iron piece, so the effective space can be maximized, and the size of the voice coil can be enlarged. It is a very useful invention that can have the overall size downsized, lightweight.

Claims (3)

Extension surfaces 30 and 30 'are formed on the yoke 20 accommodated and installed in the housing 10 in four directions, thereby forming the voice coil 40 and the central magnetic pole 50, and the iron piece 60 on the upper portion. In fixing the diaphragm 70 with) to the screw 80, Bone conduction speaker by attaching a permanent magnet 90 to the upper portion of the iron piece (60). The bone conduction speaker of claim 1, wherein upwardly bending portions 100 are formed at both ends of the yoke 20. The bone conduction speaker of claim 1, wherein a plurality of voice coils and a central stimulus are formed in the yoke.

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