JP3896913B2 - Speaker, module using the same, and electronic device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker, a module using the speaker, a mobile phone device, a communication device, and an electronic device such as a game device.
[0002]
[Prior art]
A conventional technique will be described with reference to FIG. FIG. 8 is a cross-sectional view of a conventional speaker, in which a magnetized magnet 1 is sandwiched between an upper plate 2 and a yoke 3 to constitute an inner magnet type magnetic circuit 4. A frame 6 is coupled to the yoke 3 of the magnetic circuit 4. The first diaphragm 7 is bonded to the peripheral edge of the frame 6, the voice coil 8 is coupled to the first diaphragm 7, and the first diaphragm 7 is coupled so as to fit into the magnetic gap 5 of the magnetic circuit 4. Yes. Further, a panel 9 is coupled to the peripheral portion of the frame 6 of the above-mentioned unit, and a substantially planar second diaphragm 10 is bonded to the panel 9, and the first diaphragm 7 and the second diaphragm 10 are bonded. The space is acoustically coupled by the sealed space 11. 12 in the sealed space 11 is a sound path portion for connecting the first diaphragm 7 and the second diaphragm 10 and setting the positional relationship between them.
[0003]
[Problems to be solved by the invention]
The above-mentioned speaker can emit sound from the second diaphragm 10, but has a problem that the vibration mode control of the substantially planar second diaphragm 10 is difficult and the frequency characteristics become unstable. .
[0004]
It is an object of the present invention to provide an excellent speaker that can achieve good frequency characteristics and can be miniaturized.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
[0006]
According to the first aspect of the present invention, the second diaphragm area is configured to be larger than the first diaphragm area, and the first diaphragm is within the range of the second diaphragm as viewed from the planar shape. is arranged to fit into, the second diaphragm is formed of a transparent film sheet, which has varied depending on the location of the material thickness, when acoustic coupling constituting a closed space as a medium, the second The vibration mode of the diaphragm can be adjusted, and the frequency characteristics can be improved.
[0007]
As a result, the sound quality can be improved and the shape of the sealed space can be freely designed to design the position and shape of each diaphragm. The display unit is designed under the transparent second diaphragm and seen through. You can see the display.
[0008]
According to a second aspect of the present invention, the first diaphragm is made smaller than the second diaphragm, and the first diaphragm is disposed corresponding to the end of the second diaphragm via the sealed space. It is a thing. As a result, at the time of reproduction for stereo, two acoustically coupled speakers can be used to ensure a large distance between the left and right first diaphragms, thereby improving channel separation during stereo reproduction. .
[0009]
According to a third aspect of the present invention, the second diaphragm is provided with a groove. As a result, the vibration mode of the second diaphragm can be added to the material thickness variable, and can be further finely adjusted, and the frequency characteristics can be further improved.
[0010]
According to a fourth aspect of the present invention, the first diaphragm is made smaller than the second diaphragm, and the material of the second diaphragm from the position close to the first diaphragm toward the peripheral portion. The thickness is configured to increase sequentially. Thereby, the vibration mode of the second diaphragm can be optimized, and high fidelity reproduction can be realized in terms of frequency characteristics.
[0011]
According to a fifth aspect of the present invention, the first diaphragm is made smaller than the second diaphragm, and the material of the second diaphragm from the position close to the first diaphragm toward the peripheral portion. The thickness is configured to be sequentially reduced. As a result, the vibration mode of the second diaphragm can be made into a high cut filter, and the reproduction of heavy bass can be realized in terms of frequency characteristics.
[0012]
According to a sixth 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 fifth aspects, and is modularized. Thereby, a display part and a speaker can be reduced in size and can be comprised integrally.
[0013]
According to a seventh aspect of the present invention, there is provided an electronic apparatus comprising the module according to the sixth aspect and an operation unit. Thereby, a display part, an operation part, and a speaker can be reduced in size and can be comprised integrally.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
(Embodiment 1)
Hereinafter, the first aspect of the present invention will be described with reference to the first embodiment.
[0016]
FIG. 1 shows a cross-sectional view of a speaker according to an embodiment of the present invention.
[0017]
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 periphery of the frame 26, the upper end of the voice coil 28 is coupled to the first diaphragm 27, and the lower end is fitted into the magnetic gap 25 of the magnetic circuit 24. It is configured to be joined together. Further, a panel 29 is coupled to the peripheral edge of the frame 26, and a substantially planar second diaphragm 30 is bonded to the panel 29.
[0018]
Here, the area of the second diaphragm 30 is configured to be larger than the area of the first diaphragm 27, and the first diaphragm 27 is within the range of the second diaphragm 30 as viewed from the planar shape. Is arranged.
[0019]
The second diaphragm 30 is composed of a sheet-like transparent film, and the thickness of the second diaphragm 30 varies depending on the location (specifically, the thickness of the outer peripheral portion A is reduced). When acoustically coupled to the first diaphragm 27 as a medium, the vibration mode of the second diaphragm 30 can be adjusted, and the sound pressure frequency characteristics and distortion characteristics can be adjusted by varying the material thickness. Therefore, it is possible to improve the characteristics.
[0020]
Accordingly, by setting the area of the second diaphragm 30 larger than the area of the first diaphragm 27, a portion having a large surface area on the outer peripheral portion of the set can be used as the second diaphragm 30, so that the sound quality is improved. Can be better.
[0021]
Furthermore , while realizing good characteristics, the shape of the sealed space 31 can be freely designed to design the position and shape of each diaphragm, and the display unit is designed under the transparent second diaphragm. , See through the display part.
[0022]
Thereby, the thing under a transparent film can be seen through by designing using the space under this sheet-like transparent film. With this configuration, the components can be arranged while effectively using not only the horizontal direction but also the height direction. Therefore, even when the large second diaphragm 30 is used, it is possible to improve the degree of freedom in designing the mobile phone device.
[0023]
Therefore, even if a large diaphragm is used, the mobile phone device can be reduced in size and thickness, and the design flexibility can be improved.
[0024]
Here, 32 in the sealed space 31 is a sound path portion for connecting the first diaphragm 27 and the second diaphragm 30 and setting the positional relationship between them.
[0025]
(Embodiment 2)
The second aspect of the present invention will be described below with reference to the second embodiment. FIG. 2 shows a cross-sectional view of a speaker according to an embodiment of the present invention. The difference from the first embodiment is that the two first diaphragms 27 are made smaller than the second diaphragm 30, and each end of the second diaphragm 30 is connected via a separate sound path portion 32. It is arranged corresponding to the part. Thus, by using two acoustic coupling speakers and ensuring a large distance between the left and right first diaphragms 27, channel separation can be improved during stereo reproduction.
[0026]
(Embodiment 3 )
Hereinafter, with reference to the third embodiment will be described the invention described in particular claim 3 of the present invention.
[0027]
As shown in FIG. 3, the second diaphragm 30 is provided with a groove 33. As a result, the vibration mode of the second diaphragm 30 is added to the material thickness variable, and the vibration mode is suppressed by using the groove 33 to change the vibration mode. Further improvement of the frequency characteristics such as reduction of unnecessary resonance of the diaphragm 30, reduction of distortion, and high fidelity reproduction can be realized. It is effective to provide the groove 33 halfway through the thickness of the second diaphragm 30 and set it so that there is no air leakage.
[0028]
(Embodiment 4 )
The fourth embodiment of the present invention will be described below with reference to the fourth embodiment.
[0029]
FIG. 4 shows a cross-sectional view of a speaker according to an embodiment of the present invention.
[0030]
The first diaphragm 27 is made smaller than the second diaphragm 30, and the material thickness of the second diaphragm 30 is sequentially increased from a position close to the first diaphragm 27 toward the peripheral portion. is there. Thereby, the vibration mode of the second diaphragm 30 can be optimized. That is, in the vicinity of the center portion of the second diaphragm 30 closest to the first diaphragm 27, by setting the material thickness thin, the diaphragm mass is reduced and the sound pressure level in the high range is improved. The high frequency limit can be extended. In addition, the normal material thickness setting is set near the middle part, and further, the material weight is set thick near the outer peripheral part, so that the overall weight balance can be set and reproduction can be performed well until low frequency reproduction. Can do.
[0031]
(Embodiment 5 )
Hereinafter, with reference to the fifth embodiment will be described the invention described in particular claim 5 of the present invention.
[0032]
FIG. 5 shows a cross-sectional view of a speaker according to an embodiment of the present invention.
[0033]
The first diaphragm 27 is made smaller than the second diaphragm 30, and the material thickness of the second diaphragm 30 is sequentially reduced from the position close to the first diaphragm 27 toward the periphery. is there. As a result, the thickness of the diaphragm can be increased and the vibration mode of the second diaphragm 30 can be made into a high-cut filter by setting the material thickness to be near the center portion closest to the first diaphragm 27. In terms of frequency characteristics, the mid-high range can be cut to achieve heavy bass reproduction.
[0034]
(Embodiment 6 )
The sixth aspect of the present invention will be described below with reference to the sixth embodiment.
[0035]
FIG. 6 is a partial cross-sectional view for explaining a part of the cellular phone device equipped with the speaker according to the embodiment of the present invention.
[0036]
Figure 6 is a module 50 which is composed of at least the display unit 41 and the speaker 40, the front surface of the display unit 41 the second diaphragm 30 according to claims 1 to claim 5, covering the display section 41 The module 50 is arranged and mounted in a shape. At this time, the second diaphragm 30 is formed of a transparent film sheet. Thereby, the display unit 41 is set in the lower space of the sheet-like transparent film and modularized, so that the object under the transparent film can be seen through. With this configuration, it is possible to realize further downsizing of the mobile phone device and improvement in design flexibility even when the large second diaphragm 30 is used while realizing good frequency characteristics.
[0037]
Furthermore, by modularizing in this way, it is possible to achieve process reduction during set production and rationalization at the parts distribution stage, and cost reduction can be realized.
[0038]
(Embodiment 7 )
The seventh aspect of the present invention will be described below with reference to the seventh embodiment. FIG. 7 is a partial cross-sectional view for explaining a part of the cellular phone device on which the module according to the embodiment of the present invention is mounted.
[0039]
FIG. 7 shows a mobile phone device 51 including at least a display unit 41, an operation unit 42, and a speaker 40. The cellular phone device 51 is configured by using the module 50 described in the sixth embodiment. The module 50 is coupled to the outer case 52, and the operation unit 42 is coupled to the side of the module 50. Has been. At this time, the second diaphragm 30 is formed of a transparent film sheet whose material thickness is varied depending on the location. 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 beside the display unit 41, so that the frequency characteristics are improved and the small size of the cellular phone device 51 is achieved. , Thinner, and improved design flexibility.
[0040]
Here, the arrangement of the module 50 with respect to the outer case 52 of the mobile phone device 51 can be set in accordance with the function and design in either the vertical direction or the horizontal direction.
[0041]
In addition, 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, so that further downsizing of the mobile phone device 51 and improvement in design flexibility can be realized. .
[0042]
Further, by adopting this configuration, the second diaphragm 30 can share a receiver that has been conventionally installed alone. For this reason, the sound hole for receivers conventionally required can be eliminated, and waterproofness and drip-proofness can be dramatically improved. In addition, a wide service area can be realized by the large second diaphragm 30.
[0043]
This set can be widely applied not only to mobile phone devices but also to electronic devices such as communication devices, game devices, liquid crystal televisions, personal computers and navigation devices.
[0044]
【The invention's effect】
As described above, according to the present invention, the second diaphragm area is configured to be larger than the first diaphragm area, and the first diaphragm is within the range of the second diaphragm as viewed from the planar shape. arranged, the second diaphragm is formed of a transparent film sheet, by varying the location material thickness, which is constituted by acoustic coupling as a medium a sealed space to the first diaphragm . As a result, it is possible to achieve downsizing of the mobile phone device and the like and improvement in the degree of freedom of design by using the large second diaphragm while improving the frequency characteristics.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a speaker according to an embodiment of the present invention. FIG. 2A is a cross-sectional view of a speaker according to another embodiment of the present invention. FIG. (A) is a cross-sectional view of a speaker according to another embodiment of the present invention (b) (c) is an enlarged cross-sectional view of an essential part thereof [FIG. 4] is a cross-sectional view of a speaker according to another embodiment of the present invention [FIG. 5 is a cross-sectional view of a speaker according to another embodiment of the present invention. FIG. 6A is a cross-sectional view of a module according to an embodiment of the present invention. FIG. FIG. 8A is a cross-sectional view of a mobile phone device according to an embodiment of the present invention. FIG. 8B is an enlarged cross-sectional view of a main part thereof.
21 Magnet 22 Upper plate 23 Yoke 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 First diaphragm 28 Voice coil 29 Panel 30 Second diaphragm 31 Sealed space 32 Sound path section 33 Groove

Claims (7)

A first diaphragm, a voice coil coupled to the first diaphragm, a part of which is fitted in a magnetic gap of a magnetic circuit, a sealed space coupled to the first diaphragm, and A speaker comprising a substantially planar second diaphragm coupled to a sealed space, wherein the second diaphragm area is configured to be larger than the first diaphragm area, and the first diaphragm is The speaker is arranged so as to be within the range of the second diaphragm as viewed from the plane, and the second diaphragm is constituted by a sheet-like transparent film, and the thickness of the speaker varies depending on the location.   The speaker according to claim 1, wherein the first diaphragm is made smaller than the second diaphragm, and the first diaphragm is disposed in correspondence with an end of the second diaphragm via a sealed space.   The speaker according to claim 1, wherein a groove is provided in the second diaphragm.   The speaker according to claim 1, wherein the first diaphragm is made smaller than the second diaphragm, and the thickness of the second diaphragm is gradually increased from a position close to the first diaphragm toward the peripheral portion.   The speaker according to claim 1, wherein the first diaphragm is made smaller than the second diaphragm, and the material thickness of the second diaphragm is gradually decreased from the position close to the first diaphragm toward the peripheral portion. 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 1-5 . An electronic apparatus comprising the module according to claim 6 and an operation unit.

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