JP2005184587A - Speaker, module employing the same, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker with a low profile in a speaker module and an electronic apparatus used for an acoustic apparatus. <P>SOLUTION: The speaker with a low profile is realized with a configuration such that a first diaphragm 27 and a second diaphragm 30 are formed to configure an enclosed space for acoustic coupling and a notch 29A is formed to a panel 29 for supporting the second diaphragm 30 and the second diaphragm 30 is embedded therein. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to speakers and modules used in various audio devices and information communication devices, and electronic devices such as mobile phones and game devices.

  The prior art will be described with reference to FIG. FIG. 5 is a cross-sectional view of a conventional speaker.

  As shown in FIG. 5, a magnetized magnet 1 is sandwiched between an upper plate 2 and a yoke 3 to constitute an internal magnet type magnetic circuit 4. A frame 6 is coupled to the yoke 3 of the magnetic circuit 4.

  A first diaphragm 7 is attached to the periphery of the frame 6, and a voice coil 8 is coupled to the first diaphragm 7 so as to fit in the magnetic gap 5 of the magnetic circuit 4.

  Further, a panel 9 is coupled to the peripheral edge of the frame 6, a substantially planar second diaphragm 10 is attached to the panel 9, and the space between the first diaphragm 7 and the second diaphragm 10 is sealed. A speaker 13 is configured by acoustic coupling with the space 11.

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

  There is a strong demand from the market for the above-described speakers to be thin in electronic devices such as mobile phones. Therefore, it is indispensable to make the speaker 13 thinner in order to make these electronic devices thinner.

  However, the above-mentioned speaker is an acoustically coupled speaker, and has two diaphragms in the thickness direction of the speaker, and therefore has a problem that it is very difficult to reduce the thickness in design. there were.

  An object of the present invention is to solve the above-mentioned problems and to provide an excellent speaker that can be thinned.

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

  According to the first aspect of the present invention, there is provided a frame coupled to a magnetic circuit, a first diaphragm coupled to an outer peripheral portion of the frame, coupled to the first diaphragm, A first coil comprising: a voice coil partly fitted in a magnetic gap of the magnetic circuit; a panel coupled to the frame; and a second diaphragm embedded in a recess provided in the panel. And the second diaphragm are acoustically coupled. With this configuration, the acoustic coupled speaker having two diaphragms can be thinned.

  According to a second aspect of the present invention, in the first aspect of the present invention, the front surface portion of the panel and the front surface portion of the second diaphragm are configured to have substantially the same height. Because of the relationship between the panel and the second diaphragm, the thickness of the speaker can be set to the thinnest value. Furthermore, since the panel and the second diaphragm are configured in a single plane, the phase characteristics can be improved.

  The invention according to claim 3 of the present invention is the invention according to claim 1, wherein the panel is formed with a recessed portion in accordance with the outer peripheral shape of the second diaphragm, and by this configuration, the recessed portion of the panel is formed. This step can be used as a guide when the second diaphragm is coupled to the panel, and productivity can be improved.

  According to a fourth aspect of the present invention, in the invention according to the first aspect, the recess portion of the panel is configured by providing at least three or more second diaphragm guide protrusions. Thus, the size of the recessed portion of the panel is secured to a certain extent to improve productivity, and at least three or more second diaphragm guide projections can be provided on the panel, so that the panel can be used as a high-precision guide.

  The invention according to claim 5 of the present invention is configured by applying an adhesive or a pressure-sensitive adhesive to the recessed portion of the panel according to the invention according to claim 1, and by this structure, the adhesive or pressure-sensitive adhesive is used. As a result, air leakage between the panel and the frame can be eliminated, and the airtightness of the sealed space that is acoustically coupled can be secured and the rattling noise can be prevented.

  According to a sixth aspect of the present invention, in the first aspect, the first diaphragm is configured to be smaller than the second diaphragm. With this configuration, the speaker and the speaker are used. Module and electronic equipment can be further miniaturized and design flexibility can be improved.

  According to a seventh aspect of the present invention, in the first aspect of the invention, the second diaphragm is formed of a sheet-like transparent film. Even if a display object is placed on the screen, it can be seen through a transparent film, and it is possible to further reduce the thickness and size of the module and electronic equipment using the speaker and improve the degree of freedom in design.

  According to an eighth aspect of the present invention, the panel is made of a transparent material in the first aspect of the invention, and this structure is transparent even if a display object is placed under the panel. It can be seen through the second diaphragm made of film and a transparent panel, and it is possible to realize further thinning, downsizing, and improvement in design flexibility of modules and electronic devices using this speaker. .

  According to a ninth aspect of the present invention, the front surface of the display unit is covered with the second diaphragm of the speaker according to any one of the first to eighth aspects, and is modularized. According to the configuration, the display unit and the speaker can be thinned and miniaturized to form an integrated module.

  According to a tenth aspect of the present invention, an electronic apparatus is configured by including the module according to the ninth aspect and an operation unit. With this configuration, the electronic apparatus can be reduced in thickness and size. Can do.

  As described above, according to the present invention, a hollow portion is formed in a panel, and a second diaphragm is embedded in the hollow portion to constitute an acoustic coupling speaker. With this configuration, it is possible to reduce the thickness of the acoustic coupling speaker that can be used to reduce the size of modules and electronic devices and improve the degree of design freedom by using a large second diaphragm.

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

(Embodiment 1)
Hereinafter, the first to third aspects of the present invention and the fifth to eighth aspects of the present invention will be described using the first embodiment.

  FIG. 1 is a cross-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 constitute 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, and one end opposite to the first diaphragm 27 is attached to the magnetic circuit 24. The voice coil 28 is coupled so as to fit into the magnetic gap 25.

  Further, a panel 29 is coupled to the frame 26. A recess 29A is formed on the opposite side of the panel 29 to the frame 26, a substantially planar second diaphragm 30 is disposed in the recess 29A, and an adhesive or adhesive 32 is disposed on the outer periphery thereof. Are combined. Thereby, the first diaphragm 27 and the second diaphragm 30 are acoustically coupled via the sealed space 31 to constitute the speaker 40.

  By adopting this configuration, the depression 29A is formed in the panel 29, and the second diaphragm 30 is embedded in the depression 29A, thereby reducing the thickness of the acoustic circuit coupled speaker having two diaphragms. Can be planned.

  Further, since the second diaphragm 30 is embedded in the panel 29, the second diaphragm 30 is prevented from being peeled off or peeled off due to contact with the outer peripheral portion due to an external factor. It is possible to improve quality.

  In addition, by configuring the front surface portion of the panel 29 and the front surface portion of the second diaphragm 30 to have substantially the same height, the thickness of the speaker is set to the thinnest value due to the relationship between the panel 29 and the second diaphragm 30. It can be. Further, since the panel 29 and the second diaphragm 30 are configured in one plane and have no irregularities, the phase characteristics including acoustic reflection from the panel 29 can be improved.

  In addition, the panel 29 is configured by forming the recessed portion 29A in accordance with the outer peripheral shape of the second diaphragm 30, so that the size of the recessed portion 29A of the panel 29 can be minimized, and the second vibration. It can be used as a high precision guide when the plate 30 is joined to the panel 29, and the strength reduction of the panel 29 can be minimized. Therefore, productivity can be improved and unnecessary resonance can be reduced.

  In addition, since the adhesive 29 or the adhesive 32 is applied to the recess 29A of the panel 29, air leakage between the panel 29 and the second diaphragm 30 is caused by the effect of the adhesive or the adhesive 32. As a result, it is possible to secure the airtightness of the sealed space 31 that is acoustically coupled and to prevent rattling noise. Therefore, the quality and reliability of the acoustic coupling speaker 40 can be improved.

  Further, the first diaphragm 27 is configured to be smaller than the second diaphragm 30, and in the case of the present embodiment, the second diaphragm 30 is viewed in plan view of the first diaphragm 27. Thus, even if the large second diaphragm 30 is used, the speaker can be further reduced in size, thickness, and design flexibility can be improved.

  In addition, since the second diaphragm 30 is made of a sheet-like transparent film, by designing using the lower space of the sheet-like transparent film, the thing under the transparent film can be It becomes possible to see through. For this reason, it is possible to arrange the parts 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 thickness, and the design flexibility can be improved.

  Further, since the panel 29 is made of a transparent material, the second diaphragm 30 made of the sheet-like transparent film described above is used, and further, the lower space of the transparent panel 29 is used. By designing, the thing under the transparent panel 29 can be seen through. For this reason, it is possible to arrange the parts 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 and thickness, and the design flexibility can be improved.

(Embodiment 2)
Hereinafter, the invention according to the fourth aspect of the present invention will be described 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 with respect to portions different from those of the first embodiment. The recess 29A of the panel 29 is provided with at least three guide protrusions 29B of the second diaphragm 30. It is.

  With this configuration, the size of the recess 29A of the panel 29 is secured to a certain extent to improve productivity, and at least three guide protrusions 29B of the second diaphragm 30 are provided on the panel 29 with high accuracy. Can be used as a guide.

  Furthermore, as shown in the present embodiment, the height of the outer peripheral portion of the panel 29 is set to be higher than the height of the second diaphragm 30, so that the second vibration during packing, transportation, etc. of the speaker 40 is achieved. Protection of the plate 30 can be implemented.

(Embodiment 3)
The third aspect of the present invention will be described below with reference to the third embodiment.

  FIG. 3 is a cross-sectional view of a main part of the speaker module according to the embodiment of the present invention. 3 is a speaker module including at least a display unit 41 and a speaker 40, and the second diaphragm 30 of the speaker according to any one of claims 1 to 8 is disposed on the front surface of the display unit 41. The speaker module 50 is arranged and mounted in a shape that covers the display unit 41.

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

  With this configuration, the acoustic coupling speaker module can be thinned. 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.

  Here, the arrangement location of the display unit 41 of the module 50 may be directly under the transparent film sheet as the second diaphragm 30 or may be arranged under the transparent panel 29 as in this example. good.

(Embodiment 4)
Hereinafter, the invention described in claim 10 of the present invention will be described using the fourth embodiment.

  FIG. 4 is a cross-sectional view of a main part of a mobile phone device on which the speaker module according to one embodiment of the present invention is mounted.

  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 third embodiment. The speaker module 50 is coupled to the outer case 52, and the operation unit 42 is coupled to the side of the outer casing 52. Is configured.

  With this configuration, the display unit 41 is set in the lower space of the second diaphragm 30 and the transparent panel, which is a sheet-like transparent film, and the operation unit 42 is set beside the display unit 41, so that the cellular phone device 51 is set. Can be made thinner, smaller, and more flexible in design.

  Moreover, although this embodiment demonstrated the application to a mobile telephone apparatus, it is not limited to this, Portable audio equipment and video equipment, Furthermore, electronic devices, such as a charging device of these apparatuses, are applied. Applications can also be expanded over a wide range.

  The speaker and the speaker 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, information communication equipment, game equipment, and the like. it can.

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 electronic device in one embodiment of this invention Sectional view of a conventional acoustic coupling type speaker

Explanation of symbols

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 29A Hollow part 29B Frame guide protrusion 30 2nd diaphragm 31 Sealing space 32 Adhesive or adhesive 40 Speaker 41 Display unit 42 Operation unit 50 Speaker module 51 Mobile phone device 52 Exterior case

Claims (10)

A frame coupled to a magnetic circuit; a first diaphragm coupled to an outer periphery of the frame; a voice coil coupled to the first diaphragm so as to be fitted into a magnetic gap of the magnetic circuit; A speaker comprising a panel coupled to a frame, a space surrounded by the panel coupled to the first diaphragm, and a second diaphragm coupled to the space surrounded by the panel. The speaker is configured such that the second diaphragm is embedded in a recess formed in the panel. The speaker according to claim 1, wherein the front surface portion of the panel and the front surface portion of the second diaphragm have substantially the same height. The speaker according to claim 1, wherein the panel is formed with a recess according to the outer peripheral shape of the second diaphragm. The speaker according to claim 1, wherein the recessed portion of the panel is configured by providing at least three or more second diaphragm guide protrusions. The speaker of Claim 1 which apply | coated the adhesive agent or the adhesive to the hollow part of the panel. 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 speaker module which covered the front surface of the display part with the 2nd diaphragm of the speaker as described in any one of Claims 1-8. An electronic device comprising the speaker module according to claim 9 and an operation unit.

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