JP2006324967A - Sound adjusting module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound adjusting module whose sound generation effect adjustment is completed until its shipment and which can be applied to the assembling of an earphone in an earphone factory. <P>SOLUTION: The sound adjusting module is provided with a case 31, a diaphragm 32, and a magnetic circuit set 33. The case 31 has a front wall 311 and a peripheral edge wall 312 and has a storage space 313 formed between the peripheral edge wall 312 and the front wall 311. The diaphragm 32 stored in the storage space 313 divides the storage space 313 into two partitions, where one of the partitions is a front oral sound room 314 and the other is a rear oral sound room 315. The diaphragm 32 has a rear oral sound room 315 and a vibration coil 321. The case 31 has a front oral sound room 314 and a sound hole 316. The magnetic circuit set 33 stored in the rear oral sound room 315 generates vibration in the diaphragm 32 and has a hollow attenuation sound room 363, a first air hole 364, and a second air hole 371. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an acoustic device, and more particularly to an audio adjustment module applied to an audio generator of an earphone or a hearing aid.

  As shown in FIG. 1, the known earphone structure 10 includes a speaker unit 20 between a front case part 11 and a rear case part 12, and a front cavity sound chamber 13 between the front case part 11 and the speaker 20. A rear chamber sound chamber 14 between the rear case portion 12 and the speaker unit 20, a sound hole 15 connected to the front chamber sound chamber 13 in the front case portion 11, and the rear case portion 12 in the rear case portion 12. It has a small number of pores 16 connected to the cavity sound chamber and the outside, and is connected to the vibration coil 22 by a cord 21 to generate a sensitive magnetic field, and the coil 22 generates a magnetic induction metal piece 23 and a magnet 24. And the vibration film 26 vibrates due to the attraction or repulsion of the sensitive magnetic field and the magnetic field to generate sound, and the size and sound of the front chamber sound chamber and the rear chamber sound chamber. The size, position and shape and arrangement of the holes 15 and 16 Space is intended to affect the quality of the sound generation of the earphone. In the case of production, the above-described speaker unit 20 manufactured at the electronic factory and the above-described earphone case manufactured at the plastic factory are assembled at the earphone manufacturing factory. Even if the speaker unit 20 manufactured in the electronic factory has no problem at the time of shipment, such a production method is because the design failure of the engineer of the earphone production factory or the characteristic of the speaker unit 20 is not sufficiently grasped. After mounting in the earphone case, there is a possibility that the required effect cannot be exhibited.

  The main object of the present invention is to provide an audio adjustment module that has already been adjusted at the time of shipment and is applied to the assembly of an earphone factory.

  In order to achieve the above-described object, a sound adjustment module according to the present invention includes a case, a diaphragm, and a magnetic circuit set. The case has a front wall, a peripheral wall extending rearward from the peripheral edge of the front wall, and a storage space between the peripheral wall and the front wall. The vibrating membrane is housed in the housing space of the case to divide the housing space into two, one of which is the front chamber sound chamber formed between the diaphragm and the front wall, and the other is the rear chamber. It is a sound chamber, and the vibration membrane has a vibration coil in the posterior sound chamber. The case also has at least one sound hole in the anterior chamber. The magnetic circuit set is housed in the back cavity sound chamber to generate vibration in the vibration membrane, and a hollow attenuation sound chamber containing a breathable attenuation material in the center thereof, and an attenuation sound chamber And a first pore connected to the back chamber sound chamber and a second pore connected to the attenuation sound chamber and the outside.

Embodiments of the present invention will be described below with reference to the drawings. First, the description of the drawings is as follows.
FIG. 1 is a schematic diagram showing the structure of a known earphone.

FIG. 2 is a sectional view showing the structure of the first embodiment of the present invention.
FIG. 3 is a cross-sectional view showing the structure of the second embodiment of the present invention.
FIG. 4 is a cross-sectional view showing the structure of the third embodiment of the present invention.

As shown in FIG. 2, the sound adjustment module 30 according to the first embodiment of the present invention includes the following.
The case 31 has a front wall 311, a peripheral wall 312 extending rearward from the peripheral edge of the front wall 311, and a storage space 313 between the peripheral wall 312 and the front wall 311.

  The vibrating membrane 32 is housed in the housing space of the case to divide the housing space into two, one of which is a front cavity sound chamber 314 formed between the vibrating membrane 32 and the front wall 311. One is a posterior sound chamber 315, and the vibration membrane 32 has a vibration coil 321 in the posterior sound chamber 315.

The case 31 protrudes outward from the center of the front wall 311 to form a sound hole 316.
The magnetic circuit set 33 is housed in the posterior sound chamber 315 to generate vibration in the vibrating membrane, and includes the magnetic induction metal piece 34, the annular magnet 35, the yoke 36, the substrate 37, and the damping material 38. The magnetic induction metal piece 34 and the annular magnet 35 are attached to the back cavity sound chamber 315 so as to be located outside the vibration coil 321. The yoke 36 has an inverted U-shaped body 361 and an annular shoulder 362 that extends outward from the periphery of the body and is in close contact with the magnet 35, of which the body 361 is located inside the vibration coil 321. A hollow sound attenuation chamber 363 is formed, and a first air hole 364 connected to the sound attenuation chamber 363 and the rear cavity sound chamber 315 is formed on the end surface of the body 361. The substrate 37 is attached to the outside of the yoke 36, has a second air hole 371 connected to the attenuation sound chamber 363 and the outside, and has a circuit contact 372 for connecting to a cord on the bottom surface of the substrate 37. The damping material 38 is made of a breathable material, for example, polystyrene foam, and is mounted in the damping sound chamber 363 so that the air flow rate can be adjusted.

  In order to simplify the assembly, the present embodiment has a bottom seat 39. When assembling, the yoke 36, the magnet 35, and the metal piece 34 are sequentially placed in the bottom seat 39, and then the substrate 37 is placed on the bottom 39. The above-described magnetic circuit set is completed by fixing, and then the vibrating membrane 32 is mounted above the magnetic circuit set, and then the whole is mounted together on the case 31 and the leg ends of the case 31 by riveting The audio adjustment module is completed by fixing 371 to the bottom seat 39. The fixing method may be adhesion in addition to fixing by riveting.

  A feature of this embodiment is that three chambers, that is, a front chamber sound chamber 314, a rear chamber sound chamber 315, and an attenuation sound chamber 363 are formed by the sound adjustment module. The back pressure generated by the vibration film 32 vibrating in the posterior sound chamber 315 is adjusted by the pores 364, the pores 371, the attenuation sound chamber 363, and the attenuation member 38, so that the speaker of this embodiment has the best performance and excellent performance. It is possible to demonstrate sound quality. In addition, these design adjustments can be completed independently at the electronic factory that produces the audio adjustment module. Therefore, earphone factories that use such an audio adjustment module have a combination of a speaker and other parts. It is only necessary to consider the outer shape of the earphone or the comfort during use without considering the above. Therefore, it is possible to solve the problem that the combination is difficult.

  As shown in FIG. 3, the structure of the sound adjustment module 40 according to the second embodiment of the present invention is almost the same as that according to the first embodiment, except that the sound hole 41 is formed in the peripheral wall 421 of the case 42. Is to be provided.

  As shown in FIG. 4, the structure of the sound adjustment module 50 according to the third embodiment of the present invention is almost the same as that according to the first embodiment, except that the bottom seat 39 in the first embodiment is not disposed. The vibrating membrane 51, the metal piece 52, the magnet 53, the yoke 54, and the substrate 55 are sequentially placed in the housing space of the case 56 and then fixed together by riveting or bonding.

It is a schematic diagram which shows the structure of a well-known earphone. It is sectional drawing which shows the audio | voice adjustment module by 1st Example of this invention. It is sectional drawing which shows the audio | voice adjustment module by 2nd Example of this invention. It is sectional drawing which shows the audio | voice adjustment module by 3rd Example of this invention.

Explanation of symbols

  30 sound adjustment module, 31 case, 32 diaphragm, 33 magnetic circuit set, 34 magnetic induction metal piece, 35 annular magnet, 36 yoke, 37 substrate, 38 damping material, 39 bottom seat, 40 sound adjustment module, 41 sound hole, 42 Case, 50 Sound adjustment module, 51 Vibration membrane, 52 Metal piece, 53 Magnet, 54 Yoke, 55 Substrate, 56 Case, 311 Front wall, 312 Perimeter wall, 313 Storage space, 314 Front cavity sound chamber, 315 Rear cavity sound chamber 316 Sound hole, 317 Leg end, 321 Vibration coil, 361 Body, 362 Shoulder, 363 Attenuation sound chamber, 364 First air hole, 371 Second air hole, 372 Circuit contact, 421 Perimeter wall

Claims (7)

The case has a front wall and a peripheral wall extending rearward from the peripheral edge of the front wall, and has a storage space between the peripheral wall and the front wall,
The vibrating membrane is housed in the housing space of the case to divide the housing space into two, one of which is the front chamber sound chamber formed between the diaphragm and the front wall, and the other is the rear chamber It is a sound chamber, the diaphragm has a vibration coil in the posterior chamber, the case has at least one sound hole in the anterior chamber, and the magnetic circuit set is housed in the posterior chamber. The vibration membrane generates vibration, and a hollow attenuation sound chamber containing a breathable attenuation material in the center thereof, a first pore connected to the attenuation sound chamber and the rear cavity sound chamber, the attenuation sound chamber and the outside And a second air hole connected to the sound adjustment module.   The magnetic circuit set has a yoke having an inverted U-shaped body and a shoulder extending outward from the periphery of the body, the body being positioned inside the vibration coil, and the U-shaped body by the U-shaped body. The voice mixing module according to claim 1, wherein a hollow attenuation sound chamber is formed, and the first pore is provided on an end surface of the trunk portion.   The sound adjustment module according to claim 2, wherein the magnetic circuit set includes a substrate that is mounted outside the yoke and has the second pores.   The sound adjustment module according to claim 3, wherein the magnetic circuit set includes a magnetic induction metal piece and an annular magnet that are mounted in the back chamber sound chamber so as to be positioned outside the vibration coil.   The sound adjustment module according to claim 1, wherein the magnetic circuit set is housed in a bottom seat and connected to the case by the bottom seat.   The sound adjustment module according to claim 1, wherein the sound hole of the case is positioned on the front wall.   The sound adjustment module according to claim 1, wherein the sound hole of the case is positioned on the peripheral wall.

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