JP4817142B2 - Speaker device and portable device - Google Patents

Description

  The present invention relates to a speaker device suitable for being mounted on a portable device that requires waterproof measures, such as a cellular phone, and a technology of a portable device equipped with the speaker device.

  Electronic devices that are often used outdoors, such as mobile phones, are waterproofed so that they can be used even during rain. In particular, the sound passing part is provided with a hole for sound passing from the speaker, and the sound passing part has a waterproof structure independently.

As a waterproofing of a sound passing part with a speaker, for example, as shown in Patent Document 1, a film that does not transmit water such as a waterproof film is provided on the front surface of the speaker so that water does not enter the interior of the mobile phone.
JP-A-8-79865

  In a mobile phone as shown in Patent Document 1, there is a problem that an obstacle such as an acoustic distortion is likely to occur because an acoustic resistance exists on the front surface of the speaker. In particular, when a highly airtight waterproof sheet is used, there is a problem in that a predetermined sound pressure cannot be obtained because the speaker sound from the inside hardly passes outside. Further, when the sound pressure of the speaker is increased in order to increase the volume, there is a problem that the waterproof sheet is stuck and the sound quality is deteriorated.

  Moreover, in patent document 1, since the waterproof sheet was provided in the state which covers the opening part of a speaker, there existed a problem which cannot prevent the leak of the speaker main body. That is, when the function of the waterproof sheet is deteriorated, there is a problem that water entering through the waterproof sheet enters into the speaker body or into the device.

  Therefore, an object of the present invention is to provide a speaker device and a portable device that can eliminate the need for a waterproof film as a structure for preventing water leakage of the speaker itself, and thereby improve the waterproof function while improving sound quality and increasing sound volume. There is.

In order to solve the above-described problems, a speaker device according to the first aspect of the present invention provides:
A speaker body having a voice coil;
A cylindrical frame having an end surface formed in an annular shape with a flat surface, which is formed so as to surround the speaker body;
A protector that covers the front of the speaker body periphery is fixed to the end face of the tubular frame,
A vibration plate with a waterproof peripheral portion is fixed sandwiched between the said protector and said end face of the tubular frame,
Formed on the end face of the cylindrical frame, and a slit for drawing out lead wires of the voice coil to the outside of the tubular frame,
It is formed in an annular flat surface corresponding to the shape of the end surface of the cylindrical frame, that it and a plate for closing the slits are disposed between the end face of the cylindrical frame and the diaphragm It is characterized by.

The invention according to claim 2, in the speaker device according to claim 1, wherein the vibrating plate and the protector, that is bonded through the placed double-sided tape between the vibrating plate and the protector Features.

Invention, in the speaker device according to claim 1, the O-ring for holding airtight between the peripheral portion of the diaphragm and the periphery of the protector is provided according to claim 3 It is characterized by.

Invention, in the speaker device according to claim 3, side casing forming part of the casing on the outer peripheral surface of the peripheral portion of the protector is disposed, the outer peripheral portion of the O-ring is the according to claim 4 It is characterized by being in close contact with the inner surface of the side case.

The invention according to claim 5, in the speaker device according to any one of claims 1-4, and a case protector of the speaker body is fixed, between the said periphery of the protector case The waterproof cushion material is further provided, and the waterproof cushion material is formed to have a thickness having a gap between the protector and the case.

A portable device according to a sixth aspect of the invention is characterized in that the speaker device according to any one of the first to fifth aspects is mounted.

  According to the present invention, it is possible to eliminate the need for a waterproof film as a structure for preventing water leakage of the speaker itself, and thus the waterproof function can be remarkably improved while improving sound quality and increasing sound volume.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 is a cross-sectional view of a speaker device to which the present invention is applied. FIG. 2 is a partially enlarged view of FIG. FIG. 3 is a partially enlarged exploded view of FIG. 4 is an enlarged exploded view of a portion C in FIG.

  As shown in these drawings, the speaker device S includes a speaker main body 10 having a voice coil 10 a, a cylindrical frame 12 formed so as to surround the speaker main body 10, and a peripheral edge on an end surface 12 a of the cylindrical frame 12. A protector 13 that covers the front surface of the speaker body 10 with the portion 13c fixed thereto, and a waterproof diaphragm 14 that has a peripheral edge portion 14c sandwiched and fixed between the end surface 12a of the cylindrical frame 12 and the protector 13, and A slit 12b (see FIGS. 3 and 4) formed on the end surface 12a of the cylindrical frame 12 for drawing out the lead wire 11 of the voice coil 10a to the outside of the cylindrical frame 12, and the end surface 12a and vibration of the cylindrical frame 12 And a plate 15 disposed between the plate 14 and the slit 12b.

  The speaker body 10 includes a yoke 10b sized to fit within the cylindrical frame 12, a magnet 10c disposed in a central space portion of the yoke 10b, and the voice coil 10a disposed on an outer peripheral portion of the magnet 10c. The cylindrical frame 12 is formed in a cylindrical shape so that the outer peripheral surface of the yoke 10b is in close contact with the inner peripheral surface thereof. The end surface 12a of the cylindrical frame 12 is a flat surface formed in an annular shape.

  The protector 13 is for protecting the front side of the speaker body 10 where the diaphragm 14 is present, and includes a protector body 13b in which a large number of sound passage holes 13a are formed, and a peripheral portion 13c. The protector body 13b has a circular shape in plan view, and the peripheral edge portion 13c is formed in an annular shape (ring shape). The peripheral edge 13c is formed thicker than the protector body 13b. This is designed to prevent the peripheral edge portion 13c from being easily deformed, so that the adhesion function to the diaphragm 14 can be exhibited simultaneously with the holding function of the peripheral edge portion 13c.

  The diaphragm 14 is formed of a waterproof material or a waterproof material such as a paint or a waterproof film, and includes a main body portion 14b having a center cap 14a and a peripheral portion 14c. I have. The main body 14b and the center cap 14a are both formed in a circular shape in plan view, and the peripheral edge 14c is formed in an annular shape (ring shape).

  The end face 12 a of the cylindrical frame 12 is provided with a slit 12 b for drawing out the lead wire 11 of the voice coil 10 a to the outside of the cylindrical frame 12. In this embodiment, the slit 12b extends in the radial direction of the cylindrical frame 12 along the end surface 12a, and further vertically extends from the end surface 12a along the outer peripheral surface of the cylindrical frame 12 (in the height direction of the cylindrical frame). To). Therefore, the lead wire 11 also extends along the slit 12 b and is connected to the lower electrode 17.

  As described above, the speaker device S is provided with the plate 15 disposed between the diaphragm 14 and the end surface 12a of the cylindrical frame 12 to block the slit 12b. The end surface 12a of the cylindrical frame 12 is a flat surface formed in an annular shape. The plate 15 is formed of a resin such as PET (Polyethylene terephthalate), and is formed in an annular shape (ring shape) corresponding to the end face shape of the cylindrical frame 12.

  The plate 15 is inserted between the end surface 12a of the cylindrical frame 12 and the peripheral edge portion 13c of the protector 13 and the peripheral edge portion 14c of the vibration plate 14 for uniform plane correction. Both lower surfaces are formed on a flat surface.

  The plate 15 is formed in an annular shape corresponding to the shape of the end surface 12a of the cylindrical frame 12 formed in an annular shape on a flat surface. Therefore, the entire end surface 12 a of the cylindrical plate 12 is uniformly covered with the plate 15. As a result, the peripheral edge portion 14c of the diaphragm 14 can be uniformly adhered and fixed to the upper surface of the plate 15 covering the slit 12b.

  The protector 13 and the diaphragm 14 are bonded via a double-sided tape 16 disposed between the protector 13 and the diaphragm 14. A seal using an adhesive may be used, but in that case, it is difficult to bond without a gap around the circumference. Therefore, water leakage can be effectively prevented by bonding using the double-sided tape in this way.

  In this embodiment, the speaker device S includes a housing case (a part of the casing of the portable device) 20 to which the protector 13 covering the speaker body 10 is fixed, and a space between the peripheral portion 13c of the protector 13 and the housing case 20. And a waterproof cushion material 21 provided on the housing. The waterproof cushion material 21 is formed to a thickness having a gap α between the protector 13 and the housing case 20. Therefore, water leakage between the housing case 20 and the protector 13 can be prevented, and consideration can be given so that the surface of the protector 13 does not contact the housing case 20.

  The plate 15, the peripheral edge portion 14c of the diaphragm 14, the double-sided tape 16, and the peripheral edge portion 13c of the protector 13 which are stacked in this order from the bottom on the end surface 12a of the cylindrical frame 12 are integrated by fixing including adhesion. Further, waterproofing between the housing case 20 and the speaker body 10 can be made to function by compressing the waterproof cushion material 21 provided between the peripheral portion 13c of the protector 13 and the inner surface of the housing case 20. it can.

  According to this embodiment, the plate 15 for correcting the plane is provided between the end surface 12a of the cylindrical frame 12 and the peripheral edge portion 13c of the protector 13, and between this plate 15 and the protector 13 (peripheral edge portion 13c). Since the vibration plate 14 (peripheral portion 14c) is sandwiched, the vibration plate 14 and the protector 13 can be brought into close contact with each other. Thereby, the water leak of the form shown with the arrow A which is easy to occur between the diaphragm 14 and the protector 13 can be prevented reliably.

  In addition, since the diaphragm 14 and the protector 13 are adhered to each other with a double-sided tape 16 so that the diaphragm 14 and the protector 13 are in close contact with each other, the adhesion is loosened and water does not leak even when atmospheric pressure is applied.

  7 is a sectional view similar to FIG. 1 shown as a comparative example, FIG. 8 is a partially enlarged view thereof, and FIG. 9 is a partially enlarged exploded view thereof. With reference to FIG. 7 to FIG. 9, differences and operational effects of the first embodiment will be described in more detail. In these drawings, components that are basically the same as those in the first embodiment are denoted by the same reference numerals and description thereof is simplified.

  The speaker device S shown in this comparative example also has a speaker main body 10 having a voice coil 10 a, a cylindrical frame 12 formed so as to surround the speaker main body 10, and a peripheral portion 13 c on an end surface 12 a of the cylindrical frame 12. A protector 13 that is fixed and covers the front surface of the speaker body 10, a waterproof diaphragm 14 in which a peripheral edge portion 14 c is sandwiched and fixed between the end surface 12 a of the cylindrical frame 12 and the protector 13, and the cylindrical frame 12 is provided with a slit 12b that is formed on the end face 12a of the voice coil 10a and leads the lead wire 11 of the voice coil 10a to the outside of the cylindrical frame 12.

  Therefore, in this comparative example, there is no flat correction plate 15 disposed between the diaphragm 14 and the end face 12a of the cylindrical frame 12 and closing the slit 12b. For this reason, the diaphragm 14 and the protector 13 are not sufficiently in close contact with each other, and there is a concern that water leakage in the form indicated by the arrow B may occur.

  This water leakage is caused by the slit 12b. That is, the slit 12b existing in the end surface 12a portion of the cylindrical frame 12 forms a gap corresponding to the groove width of the slit 12b between the slit 12b and the lower surface of the diaphragm 14 superimposed thereon. Therefore, a part of the diaphragm 14 is easily bent so as to bend inward of the slit 12b, that is, a depression is easily formed on the upper surface of the diaphragm 14. Thereby, the adhesiveness between the diaphragm 14 and the protector 13 is lowered, and the water leak B is likely to occur. This phenomenon is caused by the fact that the diaphragm 14 itself vibrates and is formed thin in addition to the presence of the slit 12b.

  In this regard, in the first embodiment, since the diaphragm 14 is sandwiched between the flat plate 15 for plane correction and the protector 13 (peripheral portion 13c), the diaphragm 14 and the protector 13 can be brought into close contact with each other. In addition, since the plate 15 exists below the diaphragm 14, even if there is a slit 12b below it, it is not affected by it. As a result, it is possible to reliably prevent water leakage in the form indicated by the arrow A that is likely to occur between the diaphragm 14 and the protector 13.

(Embodiment 2)
FIG. 5 is a cross-sectional view of an essential part showing Embodiment 2 of the present invention. In the second embodiment, an O-ring 30 is provided on the end surface 12a of the cylindrical frame 12 between the peripheral edge portion 13c of the protector 13 and the peripheral edge portion 14c of the diaphragm 14. It is. In this case, for positioning the O-ring 30, a groove 13d is formed on the lower surface of the peripheral edge portion 13c of the protector 13, and the O-ring 30 is fitted in the groove 13d. Of course, the groove 13d is also formed in a ring shape that goes around the end surface 12a in correspondence with the O-ring 30.

  When an O-ring is used instead of the double-sided tape 16 as described above, the O-ring 30 is formed of an elastic material, so that the O-ring is compressed by the protector 13 and the plate 15. It is possible to provide an effective means for ensuring airtightness so as to be closely attached.

(Embodiment 3)
FIG. 6 is a cross-sectional view of a main part showing Embodiment 3 of the present invention. In the third embodiment, on the end surface 12 a of the cylindrical frame 12, between the peripheral portion 13 c of the protector 13 and the peripheral portion 14 c of the diaphragm 14, and with the inner surface of a part of the side case 19 of the housing case 20. An O-ring 30 for maintaining airtightness is provided between them. Also in this case, for positioning the O-ring 30, a groove 13d is formed in the boundary portion between the lower surface and the outer peripheral surface of the peripheral portion 13c of the protector 13, and the O-ring 30 is fitted in the groove 13d.

  When configured in this manner, the outer periphery of the O-ring 30 can be brought into close contact with the inner surface of the side case 19 by forming the O-ring 30 with an elastic material. Therefore, the O-ring 30 can be strongly adhered to any of the protector 13, the diaphragm 14, and the side case 19 using the entire O-ring 30. Thereby, it can be set as the effective airtight ensuring means which a water leak does not produce.

  In the above embodiment, an example in which the present invention is applied to a speaker device employed in a mobile phone or the like has been described. However, the present invention can also be applied to a speaker device of another electronic device such as a PDA. Further, although the front shape of the speaker device is circular, it may be rectangular. In addition, it is needless to say that specific detailed structures and the like can be appropriately changed.

It is sectional drawing of the speaker apparatus which concerns on Embodiment 1 of this invention. It is the elements on larger scale of FIG. FIG. 2 is a partially enlarged exploded view of FIG. 1. FIG. 4 is an enlarged exploded view of a portion C in FIG. It is sectional drawing of the principal part of the speaker apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing of the principal part of the speaker apparatus which concerns on Embodiment 3 of this invention. It is sectional drawing of the speaker apparatus shown as a comparative example of embodiment. It is the elements on larger scale of FIG. FIG. 8 is a partially enlarged exploded view of FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Speaker main body 10a Voice coil 10b Yoke 10c Bobbin 11 Lead wire 12 Cylindrical frame 12a End surface 12b Slit 13 Protector 13a Sound passage 13b Protector main body 13c Peripheral part 13d Groove 14 Diaphragm 14c Peripheral part 15 Plate 16 Double-sided tape 17 Electrode 19 Side face Case 20 Case 21 Waterproof cushion material 30 O-ring

Claims (6)

A speaker body having a voice coil;
A cylindrical frame having an end surface formed in an annular shape with a flat surface, which is formed so as to surround the speaker body;
A protector that covers the front of the speaker body periphery is fixed to the end face of the tubular frame,
A vibration plate with a waterproof peripheral portion is fixed sandwiched between the said protector and said end face of the tubular frame,
Formed on the end face of the cylindrical frame, and a slit for drawing out lead wires of the voice coil to the outside of the tubular frame,
It is formed in an annular flat surface corresponding to the shape of the end surface of the cylindrical frame, that it and a plate for closing the slits are disposed between the end face of the cylindrical frame and the diaphragm A speaker device characterized by the above. The protector and the diaphragm speaker according to claim 1, characterized in that it is bonded through the placed double-sided tape between the vibrating plate and the protector. The speaker device according to claim 1, characterized in that the O-ring for holding airtight between the peripheral portion of the diaphragm and the periphery of the protector is provided. Side casing forming part of the casing on the outer peripheral surface of the peripheral portion of the protector is placed, in claim 3 the outer peripheral portion of the O-ring is equal to or in close contact with the inner surface of the side case The speaker device described. A case protector of the speaker body is fixed, further comprising the peripheral edge of the protector and the waterproof cushion material provided between the casing, the waterproof cushion material, between the protector and the casing speaker according to any one of claims 1-4, characterized in that it is formed to a thickness with a gap. A portable device comprising the speaker device according to any one of claims 1 to 5 .

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