JP4329636B2 - Speaker, module using the same, and electronic device - Google Patents

Description

  The present invention relates to a speaker, a module using the speaker, and an electronic device such as a mobile phone, a communication device, or a game device.

  The prior art will be described with reference to FIG. FIG. 5 is a cross-sectional view of a conventional speaker, in which a magnetized magnet 21 is sandwiched between an upper plate 22 and a yoke 23 to constitute an inner magnet type magnetic circuit 24. A frame 26 is coupled to the yoke 23 of the magnetic circuit 24. A first diaphragm 27 is attached to the periphery of the frame 26, a voice coil 28 is coupled to the first diaphragm 27, and the voice coil 28 is fitted into the magnetic gap 25 of the magnetic circuit 24. Are connected. Further, a panel 29 is coupled to the peripheral portion of the frame 26 of the above-described unit, and a substantially planar second diaphragm 30 is attached to the panel 29, and the first diaphragm 27 and the second diaphragm 30 are attached. Are acoustically coupled by a sealed space 31 to constitute an acoustic coupling speaker.

For example, Patent Document 1 is known as prior art document information relating to the invention of this application.
Japanese Patent Laid-Open No. 2003-179988

  In the above-described speaker, the air layer partitioned by the first diaphragm 27 and the second diaphragm 30 acts as a capacitor, which absorbs sound propagation at a high frequency, It had the subject of attenuating sound pressure and deteriorating sound quality.

  In the present invention, an equalizer is installed, and in addition to the effect as an equalizer, the volume of air sandwiched between the first diaphragm 27 and the second diaphragm 30 is adjusted to attenuate sound pressure at high frequencies. An object of the present invention is to provide a speaker capable of reducing noise.

  In order to achieve the above object, the present invention has the following configuration.

According to a first aspect of the present invention, there is provided a frame coupled to the magnetic circuit, a first diaphragm coupled to an outer peripheral portion of the frame, coupled to the first diaphragm, A voice coil partially fitted in the magnetic gap of the magnetic circuit, a panel coupled to the frame, the frame coupled to the first diaphragm, and a space surrounded by the panel, are enclosed by the panel. Surrounded by the second diaphragm coupled to seal the space, the first diaphragm having irregularities on the surface, the frame, the panel, and the plate-like second diaphragm It is a speaker comprised with the equalizer which has an opposing part close | similar to the shape of the said 1st diaphragm installed in sealed space. With this configuration, an equalizer is installed, and in addition to the effect as an equalizer, the volume of the sealed space is adjusted to be small, and the second diaphragm is used as a medium for the first diaphragm. By adjusting the acoustic coupling, the volume of the air sandwiched between the first diaphragm and the second diaphragm is adjusted, and the attenuation of sound pressure at high frequencies is reduced, so that two diaphragms The effect which improves the sound quality of the acoustic coupling speaker which has this is acquired.

As described above, according to the present invention, an equalizer having a facing portion close to the shape of the first diaphragm is installed in a sealed space between the first diaphragm and the second diaphragm, in addition to the effect as an equalizer. The second diaphragm is acoustically coupled to the first diaphragm using the sealed space as a medium after adjusting the volume of the sealed space. With this configuration, it is possible to reduce the size of the mobile phone device and improve the design flexibility of the speaker system using the large second diaphragm while improving the sound quality.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Hereinafter, the first, second, and fourth aspects of the present invention will be described with reference to the first embodiment.

  FIG. 1 is a sectional view of a speaker according to an embodiment of the present invention. As shown in FIG. 1, a magnetized magnet 21 is sandwiched between an upper plate 22 and a yoke 23 to form an internal magnet type magnetic circuit 24. A frame 26 is coupled to the yoke 23 of the magnetic circuit 24. The outer periphery of the first diaphragm 27 is bonded to the peripheral edge of the frame 26, one end of the voice coil 28 is coupled to the first diaphragm 27, and the opposite end of the voice coil 28 is connected to the magnetic circuit 24. The magnetic gap 25 is coupled so as to be fitted. Further, a panel 29 is coupled to the peripheral edge of the frame 26, a substantially planar second diaphragm 30 is bonded to the panel 29, and the sealing between the first diaphragm 27 and the second diaphragm 30 is performed. The equalizer 33 is installed in the space 31.

  With this configuration, in addition to the effect as an equalizer, the volume of the sealed space 31 between the first diaphragm 27 and the second diaphragm 30 can be reduced, and sound quality can be improved. .

Furthermore, the equalizer 33 is configured to be installed in front of the first diaphragm having an uneven surface . Further, the first diaphragm 27 is configured to be smaller than the second diaphragm 30. Furthermore, in the case of the present embodiment, the first diaphragm 27 is provided within the range of the second diaphragm 30 when viewed in plan.

  With this configuration, the volume of the sealed space 31 between the first diaphragm 27 and the second diaphragm 30 can be adjusted, and sound quality can be improved.

(Embodiment 2)
The second aspect of the present invention will be described below with reference to the second embodiment.

  FIG. 2 is a cross-sectional view of a speaker according to an embodiment of the present invention. The contents shown in FIG. 2 will be described only for parts different from the first embodiment. One or more sound path portions 32 for acoustically coupling the first diaphragm 27 and the second diaphragm 30 to the equalizer 33 are provided. It is configured. With this configuration, the arrangement and quantity of the sound path portions 32 can be adjusted in consideration of the unevenness of the first diaphragm 27, and the sound quality can be improved.

(Embodiment 3)
In the following, the third aspect of the present invention will be described with reference to the fifth and sixth aspects of the present invention.

  Here, the second diaphragm 30 shown in FIGS. 1 and 2 is formed of a sheet-like transparent film. With this configuration, the space under the transparent film can be seen through by designing using the space under the sheet-like transparent film. For this reason, the components can be arranged while effectively using not only the horizontal direction but also the height direction. Therefore, even if the large second diaphragm 30 is used, the speaker can be further reduced in size and the degree of design freedom can be realized.

  Further, the panel 29 is made of a transparent material. With this configuration, the second diaphragm 30 composed of the above-described sheet-like transparent film is used, and further, the design below the transparent panel 29 is used to design the lower diaphragm 29. Can be seen through. For this reason, the components can be arranged while effectively using not only the horizontal direction but also the height direction. Therefore, even if the large second diaphragm 30 and the panel 29 are used, the speaker can be further reduced in size, thickness, and design flexibility can be improved.

(Embodiment 4)
Hereinafter, the fourth aspect of the present invention will be described with reference to the fourth embodiment.

  FIG. 3 is a cross-sectional view of a speaker module according to an embodiment of the present invention. FIG. 3 shows a speaker module including at least a display unit 41 and a speaker 40. The second diaphragm 30 in the above-described speaker is mounted on the front surface of the display unit 41 so as to cover the display unit 41. Speaker module 50.

  At this time, the second diaphragm 30 is made of a transparent film sheet, and the panel 29 is made of a transparent material. As a result, the display unit 41 is set in the transparent space of the transparent film sheet and the panel and modularized, so that the transparent film and the material under the film can be seen through.

  Furthermore, by modularizing in this way, it is possible to reduce the process during set production and rationalize at the parts distribution stage, and it is possible to realize cost reduction.

(Embodiment 5)
Hereinafter, the invention described in the eighth aspect of the present invention will be described with reference to the fifth embodiment.

  FIG. 4 is a cross-sectional view of a main part of a mobile phone device equipped with the speaker module of one embodiment of the present invention. FIG. 4 shows a cellular phone device 51 including a speaker module 50 including at least a display unit 41 and a speaker 40 and an operation unit 42.

  The cellular phone device 51 is configured by using the speaker module 50 described in the fourth embodiment. The speaker module 50 is coupled to the outer case 52, and the operation unit 42 is coupled to the side of the speaker module 50. Is configured. As a result, the display unit 41 is set in the lower space of the sheet-like transparent film, and the operation unit 42 is set on the side of the display unit 41, thereby improving the frequency characteristics and reducing the size of the cellular phone device 51. , Improvement in design freedom can be realized.

  Further, it is possible to set both the display unit 41 and the operation unit 42 in the lower space of the sheet-like transparent film, and it is possible to realize further downsizing of the mobile phone device 51 and improvement in design flexibility. Become.

  The speaker and the module according to the present invention can emit sound from the display unit by using a transparent film and a transparent panel in addition to the function of producing sound, and can be applied to audiovisual equipment.

Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker module in one embodiment of this invention Sectional drawing of the principal part of the mobile telephone apparatus carrying the speaker module in one embodiment of this invention Cross-sectional view of a conventional speaker

DESCRIPTION OF SYMBOLS 21 Magnet 22 Upper plate 23 Yoke 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 1st diaphragm 28 Voice coil 29 Panel 30 2nd diaphragm 31 Sealed space 32 Sound path part 33 Equalizer 40 Speaker 41 Display part 42 Operation part 50 Speaker module 51 Mobile phone device 52 Exterior case

Claims (8)

A frame coupled to the magnetic circuit, a first diaphragm coupled to the outer periphery of the frame, and a first diaphragm coupled to the first diaphragm, and a part thereof being fitted into the magnetic gap of the magnetic circuit A voice coil, a panel coupled to the frame, the frame coupled to the first diaphragm, a space surrounded by the panel, and a first coupled to hermetically seal the space surrounded by the panel. A first diaphragm having an uneven surface, the frame coupled to the first diaphragm, the panel, and the plate-like second diaphragm. And an equalizer having a facing portion close to the shape of the first diaphragm is installed in the sealed space surrounded by and adjusted so as to reduce the volume of the sealed space, and the second diaphragm is Sealed on the first diaphragm While by acoustic coupling in the medium, the first diaphragm and adjust the second vibration plate and sandwiched by volume of air, speaker and reduce the attenuation of sound pressure in the high range. The speaker according to claim 1, wherein the equalizer is installed in front of the first diaphragm having an uneven surface . The speaker according to claim 2, wherein the equalizer is provided with one or more holes for sound paths. The speaker according to claim 1, wherein the first diaphragm is smaller than the second diaphragm. The speaker according to claim 1, wherein the second diaphragm is made of a sheet-like transparent film. The speaker according to claim 1, wherein the panel is made of a transparent material. The module which covered the front surface of the display part with the 2nd diaphragm of the speaker as described in any one of Claims 1-6. An electronic apparatus comprising the module according to claim 7 and an operation unit.

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