JP2003244787A - Speaker, module and electronic equipment employing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the performance preparing for downsizing of an electronic equipment and for stereophonic application tendency with respect to a speaker used for an information communication equipment, a module and the electronic equipment mounted with the speaker. <P>SOLUTION: This invention is configured by acoustically coupling two or more first diaphragms 27 to one second diaphragm 30 by using an enclosed space for a medium and the second diaphragm 30 is configured as two divisions via a material 33 rich in flexibility so as to enhance channel separation for the compatibility with stereophonic applications. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker, a module using the speaker, and an electronic device such as a mobile phone device, a communication device or a game device.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIG. Figure 6
FIG. 4 is a sectional view of a conventional speaker.

As shown in FIG. 6, a magnetized magnet 1 is sandwiched between an upper plate 2 and a yoke 3 to form an inner magnet type magnetic circuit 4. The frame 6 is coupled to the yoke 3 of the magnetic circuit 4. A first vibrating plate 7 is adhered to the peripheral portion of the frame 6, a voice coil 8 is connected to the first vibrating plate 7, and the voice coil 8 is connected so as to fit into the magnetic gap 5 of the magnetic circuit 4. I am configuring. Further, a panel 9 is joined to the peripheral portion of the frame 6 for the two units described above, and the second diaphragm 10 having a substantially flat shape is adhered to the panel 9, so that the first diaphragm 7 and the second diaphragm 10 are bonded together. The vibration spaces 10 are acoustically coupled by the closed space 11.

With this configuration, the shape of the closed space 11 can be freely designed to design the position and shape of each diaphragm, so that even if a large diaphragm is used, the portable telephone device can be made smaller, thinner, and designed. The degree of freedom of can be improved. Here, 12 in the closed space 11 is a sound path portion for connecting the first diaphragm 7 and the second diaphragm 10 and setting the respective positional relationships.

[0005]

With the downsizing of the portable telephone, which is the set, and the multi-functionality of stereo distribution and the like, the above-mentioned speaker is required to be downsized and have a degree of freedom in layout. However, in order to reduce the size of the mobile phone device and stereo distribution, one unit for two units
Since the two substantially diaphragm-shaped second diaphragms 10 are acoustically coupled to each other, the size of the mobile phone can be reduced, but two units are equivalent to one substantially planar second vibration. Since the sound is reproduced on the board 10, it has a structure in which crosstalk in which sounds of two units are mixed is generated. As a result, the channel separation during stereo reproduction is aggravated and the sense of stereo is reduced, which is a problem.

It is an object of the present invention to provide an excellent speaker that can realize stereo distribution with high performance by improving the channel separation and can be downsized.

[0007]

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

According to a first aspect of the present invention, two or more first vibrating plates and one second vibrating plate are acoustically coupled to each other with a sealed space as a medium. The second diaphragm is divided into two parts with a flexible material interposed therebetween. With this configuration, it is possible to freely design the shape of the closed space and design each diaphragm position and shape.
Therefore, even if a large diaphragm is used, the second diaphragm is divided into two via a flexible material while achieving downsizing and thinning of the mobile phone device and improving the degree of freedom in design. It is possible to improve the channel separation during stereo playback.

According to a second aspect of the present invention, the first diaphragm is smaller than the second diaphragm, and the first diaphragm is provided with an end portion of the second diaphragm through a sealed space. It is provided and configured. Thereby, the distance between the left and right first diaphragms can be increased, and the channel separation can be further improved during stereo reproduction.

According to a third aspect of the present invention, the second diaphragm is formed of a sheet-shaped transparent film. As a result, the display unit can be designed under the transparent diaphragm, and the display unit can be seen through, and the mobile phone device can be downsized and the degree of freedom in design can be further improved.

According to a fourth aspect of the present invention, the area of the second diaphragm is larger than that of the first diaphragm. As a result, it is possible to improve mountability and design flexibility.

According to a fifth aspect of the present invention, the divided second vibrating plate is arranged at substantially the same position in plan view as the first vibrating plate via the sealed space. . Thereby, the vibration of the first diaphragm can be accurately transmitted to the second diaphragm, and high-fidelity reproduction can be realized.

According to a sixth aspect of the present invention, a transparent material is arranged as a highly flexible material that divides the second diaphragm into two parts. With this, when the second diaphragm is made of a transparent film, even if the diaphragm is divided into two parts with a material having a high flexibility, there is nothing visually shielded, so that the transparent diaphragm is placed under the transparent diaphragm. Even if the display unit is designed, the display unit can be seen through without any visual obstacle.

According to a seventh aspect of the present invention, silicon is arranged as a material having high flexibility to divide the second diaphragm into two parts. As a result, it is possible to realize high waterproofness and improvement in channel separation during stereo reproduction that is stable over a wide temperature range.

The invention according to claim 8 of the present invention is configured by disposing rubber as a highly flexible material for dividing the second diaphragm into two parts. As a result, the flexibility of flexibility can be selected over a wide range, so that the channel separation can be adjusted.

According to a ninth aspect of the present invention, an elastomer is arranged as a highly flexible material that divides the second diaphragm into two parts. As a result, high productivity and cost reduction can be realized.

The invention according to claim 10 of the present invention is the second aspect.
The diaphragm is divided into two parts, and a foam material is arranged as a highly flexible material. As a result, a great improvement in channel separation due to high internal loss can be realized.

According to an eleventh aspect of the present invention, the speaker according to any one of the first to tenth aspects is provided adjacent to the display section, and the front surface of the display section is covered with the second diaphragm of the speaker. The module is configured as follows. As a result, the display unit and the speaker can be downsized and integrated.

According to a twelfth aspect of the present invention, there is provided an electronic device comprising the module according to the eleventh aspect and an operating section. Accordingly, the display unit, the operation unit, and the speaker can be downsized and integrated.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) The first embodiment of the present invention will be described below, particularly the invention described in claim 1.

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 inner magnet type magnetic circuit 24. A frame 26 is coupled to the yoke 23 of the magnetic circuit 24. A first vibrating plate 27 is adhered to the peripheral portion of the frame 26, a voice coil 28 is connected to the first vibrating plate 27, and the first vibrating plate 27 is connected so as to fit into the magnetic gap 25 of the magnetic circuit 24. I am configuring. Further, the panel 2 is provided on the peripheral portion of the frame 26 for the two units described above.
The second diaphragm 30 having a substantially flat shape is bonded to the panel 29 by connecting the first diaphragm 9 and the second diaphragm 30. The second vibrating plate 30 is divided into two parts with a highly flexible material 33 in the substantially central part.

The first vibration plate 27 and the second vibration plate 30 are acoustically coupled by the closed space 31.

With this structure, it is possible to improve the channel separation at the time of stereo reproduction by being divided into two parts through the highly flexible material 33. In addition, by freely designing the shape of the closed space 31 and designing the respective diaphragm positions and shapes, even if a large diaphragm is used, the mobile phone device can be made smaller, thinner, and more flexible in design. Can be realized.

Here, 32 in the closed space 31 is the first
This is a sound path portion for connecting the diaphragm 27 and the second diaphragm 30 and setting the positional relationship between them.

(Second Embodiment) The second embodiment of the present invention will be described below, particularly the invention described in claim 2. FIG. 2 shows a cross-sectional view of the speaker according to the 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 the two first diaphragms 27 and their sound path portions 32 are closed space 31. The outer peripheral portion of the frame 26, which is provided at each end of the second diaphragm 30 via the first diaphragm 27 and is connected to the outer periphery of the frame 29 to which the second diaphragm 30 is supported. The sound path part 32 is partially connected. As a result, the distance between the left and right first diaphragms 27 can be increased, so that crosstalk between the left and right channels can be reduced, and further channel separation can be improved during stereo reproduction. The second diaphragm 30 is separated into the right and left as shown in FIG.

(Third Embodiment) The third embodiment of the present invention will be described below with reference to the present invention. The difference from the first embodiment of FIG. 1 is that the second diaphragm 30 is made of a sheet-shaped transparent film. Accordingly, by designing using the lower space of the sheet-like transparent film, it is possible to see through the lower part of the transparent film. With this configuration, the parts can be arranged while effectively utilizing not only the lateral direction but also the height direction. Therefore, the large second diaphragm 3
Even if 0 is used, the mobile phone device can be further downsized and the degree of freedom in design can be improved.

(Fourth Embodiment) The fourth embodiment of the present invention will be described below with reference to the present invention. This is to set the area of the second diaphragm 30 larger than the area of the first diaphragm 27 as shown in FIG. 1, and since a portion having a large surface area of the outer peripheral portion of the set can be used as the second diaphragm 30. It is possible to realize efficient mountability and design.

(Fifth Embodiment) The fifth embodiment of the present invention will be described below with reference to the present invention. FIG. 3 shows a cross-sectional view of the speaker according to the embodiment of the present invention.

In the structure shown in FIG. 3, the second vibrating plate 30 divided into the left and right as shown in FIG. 2 (b) is arranged in correspondence with the corresponding first vibrating plate 27 via a closed space. It is a thing. Thereby, the vibration of the first diaphragm 27 can be accurately transmitted to the left and right portions of the second diaphragm 30 corresponding to each, and the unnecessary resonance of the second diaphragm 30 can be reduced and the distortion can be reduced. And high fidelity reproduction can be realized.

(Sixth Embodiment) The sixth embodiment of the present invention will be described below with reference to the present invention. This is configured by disposing a transparent material as the highly flexible material 33 that divides the second diaphragm 30 into two parts. As a result, even when the second diaphragm 30 is made of a transparent film, there is nothing that visually shields it. Therefore, even if the display unit is designed under the second diaphragm 30,
Can be seen through without any visual obstacle.

(Embodiment 7) In the following, Embodiment 7 will be used to explain the invention of claims 7 to 10 of the present invention. The difference from the first embodiment is that the second part of FIG.
As the highly flexible material 33 that divides the diaphragm 30 into two, silicon, rubber, elastomer, and foam are arranged respectively. At this time, in the case of silicon, it is possible to realize high waterproofness and improved channel separation during stereo reproduction that is stable over a wide temperature range. In the case of rubber, since the flexibility of flexibility can be selected in a wide range, adjustment of channel separation can be realized. In the case of an elastomer, high productivity and low cost can be realized. In the case of foam, it is possible to realize a great improvement in channel separation due to high internal loss.

As described above, by properly using the flexible material 33 that divides the second diaphragm 30 into two parts, various effects depending on the characteristics can be obtained.

(Embodiment 8) Hereinafter, the invention of claim 11 of the present invention will be described with reference to Embodiment 8. FIG. 4 is a partial cross-sectional view for explaining a part of the mounted state of the mobile phone device equipped with the speaker of the embodiment of the present invention.

FIG. 4 shows at least the display unit 41 and the speaker 4.
A module 50 configured from 0, wherein the second diaphragm 30 according to claim 1 is mounted on the front surface of the display unit 41 so as to cover the display unit 41. Is. At this time, the second diaphragm 30 is composed of a transparent film sheet, and is divided into two via a highly flexible material 33. In this way, by setting the display unit 41 in the lower space of the sheet-like transparent film and modularizing it, the one under the transparent film can be seen through. With this configuration, it is possible to improve the channel separation during stereo reproduction. Further, even if the large second diaphragm 30 is used, it is possible to further reduce the size of the mobile phone device and improve the degree of freedom in design.

Further, by modularizing in this way, it is possible to reduce the number of processes during set production and rationalize the parts distribution stage, and it is possible to realize cost reduction.

(Ninth Embodiment) The ninth embodiment of the present invention will be described below with reference to the present invention. FIG. 5 is a partial cross-sectional view for explaining a part of a mounted state of a mobile phone device equipped with a module according to an embodiment of the present invention.

FIG. 5 shows at least the display unit 41 and the operation unit 42.
The mobile phone device 51 includes a speaker 40 and a speaker 40. The mobile phone device 51 is configured by using the module 50 described in the eighth embodiment, and the module 50 is coupled to the outer case 52, and the operation portion 42 is coupled to the side of the outer casing 52 to configure a main portion thereof. Has been done. At this time, the second diaphragm 30 is made of a transparent film sheet. 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 it.
By setting, it is possible to reduce the size and thickness of the mobile phone device 51 and improve the degree of freedom in design.

With this configuration, it is possible to improve the channel separation during stereo reproduction. Here, the arrangement of the module 50 with respect to the outer case 52 of the mobile phone device 51 can be set in either the vertical direction or the horizontal direction according to the function or design.

It is also possible to set both the display section 41 and the operation section 42 in the lower space of the sheet-like transparent film, so that the portable telephone device 51 can be further downsized and the design flexibility can be improved. be able to.

Further, with this configuration, the second diaphragm 30 can also be used as a common receiver, which is conventionally installed alone. Therefore, the sound hole for the receiver, which has been conventionally required, can be eliminated, and the waterproof property and the drip-proof property can be dramatically improved. Further, it is possible to realize a wide service area by using the large second diaphragm 30.

The 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]

As described above, according to the present invention, two or more first vibrating plates and a second vibrating plate divided into two by a material having a high flexibility are used as a medium in an acoustic space. It is composed by combining. As a result, it is possible to freely design each diaphragm position and shape, and even modules and electronic devices using them.
Even if the diaphragm is used, the size of the mobile phone device can be reduced and the degree of freedom in design can be improved. Also, it is possible to improve the channel separation during stereo reproduction.

As described above, the present invention can provide an excellent speaker which can realize miniaturization of a speaker and a portable telephone device and high performance stereo distribution correspondence, and its industrial value is extremely great. is there.

[Brief description of drawings]

FIG. 1 is a 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, and FIG. 2B is an enlarged cross-sectional view of a main part thereof.

FIG. 3 is a cross-sectional view of a speaker according to another embodiment of the present invention.

FIG. 4 is a sectional view of a module according to an embodiment of the present invention.

FIG. 5 is a sectional view of a mobile phone device according to an embodiment of the present invention.

FIG. 6 is a sectional view of a conventional speaker.

[Explanation of symbols]

21 magnet 22 Upper plate 23 York 24 Magnetic circuit 25 magnetic gap 26 frames 27 First diaphragm 28 voice coils 29 panels 30 Second diaphragm 31 closed space 32 sound section 33 Flexible material

Claims (12)

[Claims] 1. The same number of frames coupled to two or more magnetic circuits, the same number of first diaphragms coupled to the outer peripheral portion of the frames, and the first diaphragm. At the same time, the same number of voice coils, a part of which is fitted in the magnetic gap of the magnetic circuit, a sealed space in which the first diaphragm is coupled, and a second substantially planar surface coupled in the sealed space. A speaker that is configured by dividing the diaphragm of 2 into two with a flexible material interposed therebetween. 2. The speaker according to claim 1, wherein the first diaphragm is smaller than the second diaphragm, and the first diaphragm is provided at the end of the second diaphragm through a sealed space. . 3. The speaker according to claim 1, wherein the second diaphragm is made of a sheet-shaped transparent film. 4. The speaker according to claim 1, wherein the area of the second diaphragm is larger than the area of the first diaphragm. 5. The speaker according to claim 1, wherein the divided second diaphragm is arranged at substantially the same position in a plane as the first diaphragm via a closed space. 6. The speaker according to claim 1, wherein a transparent material is arranged as the material having high flexibility. 7. The speaker according to claim 1, wherein silicon is arranged as a highly flexible material. 8. The speaker according to claim 1, wherein rubber is arranged as a material having high flexibility. 9. The speaker according to claim 1, wherein an elastomer is arranged as a material having high flexibility. 10. The speaker according to claim 1, wherein a foam material is arranged as a material having high flexibility. 11. A module comprising a speaker according to claim 1 adjacent to a display section, wherein the front surface of the display section is covered with a second diaphragm of the speaker. . 12. An electronic device comprising the module according to claim 11 and an operation unit.