JP2006238181A - Portable case body and method of assembling speaker to portable case body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the output sound of a speaker from being lowered even when a case body is moved to a place of a different atmospheric temperature. <P>SOLUTION: The portable case body 11 of a waterproof structure provided with the speaker 12 in the inside comprises: a spacer 18 interposed between a waterproof sheet 16 attached to the speaker attaching surface of the case body 11 for which a plurality of small holes 15 are bored on the opposing surface of the speaker 12 and the case body 11; and an intermediate metal fitting 19 interposed between pressing metal fittings 13A and 13B for fixing the speaker 12 to the case body 11 and the waterproof sheet 16. A space A is secured between the waterproof sheet 16 and the case body 11 by the spacer 18, and since vibrations generated by the speaker 12 are propagated through the space A and the small holes 15 to the outside of the case body 11, the sound of the speaker 12 is not lowered. A slit communicating a space B and a space C is cut on the intermediate metal fitting 19. Since a pressure difference between the inside and outside of the speaker 12 inside the case body 11 is eliminated by the slit, the shake of the diaphragm of the speaker is prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a waterproof portable case, and more particularly to a waterproof portable case having a speaker inside and a method of assembling a speaker in the portable case.

  The piezoelectric sounding body 90 described in Patent Document 1 (see FIG. 1 of the same document) is a drop of water or moisture when the cordless telephone and the portable telephone are used in a flying or humid environment such as a bathroom or a bathroom. In order to prevent the intrusion of water and to reduce the deterioration of sound pressure due to waterproofing measures, a waterproof sheet is provided on the opening edge 55 so as to close the entire opening 52 of the storage case 51 in which the piezoelectric diaphragm 60 is stored. 72 and the waterproof sheet 72 is disposed on the mounting surface of the mounting base 81 in the handset body 80 via a non-breathable elastic member (rubber ring or the like) 91. With this structure, the inside of the storage case 51 is kept completely airtight by the waterproof sheet 72 and the non-breathable elastic member 91, and from the sound passage holes 82 and 82 ′ opened on the mounting surface of the mounting base 81, the external environment. Water droplets and moisture are prevented from entering the inside of the storage case 72.

  As in the case of the piezoelectric sounding body described in Patent Document 1, there is a case in which an electronic device such as a mobile phone or a portable radio is housed in a small housing with a built-in speaker. There is a small hole that makes sound on the surface of such a waterproof portable structure. If it is raining, rainwater will enter the case even if rainwater enters from the small hole. It has a structure in which a waterproof sheet is attached to prevent intrusion.

  FIG. 4 is a cross-sectional view of a speaker mounting portion of a housing according to the prior art. 4 is a waterproof portable case having a speaker 42 inside. The speaker 42 is fixed to the casing 41 with screws 44A and 44B via presser fittings 43A and 43B so that the casing 42 does not move by an external force due to carrying when the casing 41 is moved. A plurality of small holes 45 penetrating the housing 41 are formed on the inner surface of the housing 41 facing the speaker 42. A waterproof sheet 46 is adhered and adhered to the inner surface of the housing 41.

JP-A-6-98977 (paragraphs [0023] and [0027] in the specification, [FIG. 1] and abstract in the drawings)

  When such a casing 41 is carried to a place where the ambient temperature is different, especially when the casing 41 is moved from indoors to outdoors or from outdoors to indoors, the temperature between the temperature inside the casing 41 and the outside temperature is between. Significant temperature differences may occur. For example, when the casing 41 is moved from indoor to outdoor when the indoor temperature is considerably higher than the outdoor temperature as in winter, the atmospheric pressure outside the casing 41 is constant at atmospheric pressure. The external temperature rapidly decreases, the internal temperature of the housing 41 decreases later, and the internal atmospheric pressure also decreases accordingly. As a result, air pressure is applied to the housing 41 from the outside to the inside, and air flows from the outside to the inside through the small holes 45. The air pressure inside the housing is lower than the outside air pressure, and the inside of the housing shrinks. During this time, an inward force that presses the waterproof sheet 46 against the diaphragm (cone) 47 of the speaker 42 acts, particularly in the case of a flat speaker. However, since the waterproof sheet 46 collides with the cone 47, the cone 47 of the speaker 42 is difficult to vibrate, resulting in a problem that the sound is reduced.

  On the other hand, when the housing 41 is moved from the outdoor to the indoor when the indoor air temperature is considerably higher than the outdoor air temperature, the atmospheric pressure outside the housing 41 is constant at atmospheric pressure, but the temperature outside the housing 41 is constant. The temperature rises abruptly, and the internal temperature of the casing 41 rises with a delay, and the internal atmospheric pressure rises accordingly. As a result, air pressure is applied to the housing 41 from the inside to the outside, and the air flows from the inside to the outside through the small hole 45. The pressure inside the housing is higher than the outside air pressure, and the inside of the housing expands. During this time, an outward force that presses the waterproof sheet 46 against the inner surface of the housing 41 acts, Since the sheet 46 is almost completely in close contact, the gap between the sheets 46 becomes substantially zero, and the waterproof sheet 46 can no longer vibrate. There is a problem that the sound is transmitted to the outside of the housing 41 through the sound and the sound is reduced as a result.

Therefore, the present invention improves the sound wave output from the speaker without reducing the sound from the speaker even when the waterproof portable housing having the speaker is moved to a place where the ambient temperature is different. It is an object of the present invention to provide a portable case that propagates outside the case and a method for assembling a speaker to the portable case.
The portable housing according to the first embodiment of the present invention that achieves the above object has a waterproof structure with a speaker inside, and the housing has a surface with a plurality of small holes, and the speaker is on the surface. A waterproof sheet is attached to the speaker mounting surface of the housing, and a spacer is interposed between the waterproof sheet and the housing.

A portable housing according to a second embodiment of the present invention that achieves the above object has a waterproof structure including a speaker inside, and the housing has a surface with a plurality of small holes, and the speaker is mounted on the surface. A waterproof sheet is attached to the speaker mounting surface of the casing, and an intermediate bracket is interposed between the presser bracket for fixing the speaker to the casing and the waterproof sheet. It is characterized by that.
An intermediate fitting interposed between a waterproof sheet to be attached to a speaker mounting surface of a housing having a plurality of small holes on the facing surface of the speaker and a presser fitting for fixing the speaker to the housing;
It is provided with.

  The portable housing according to the third embodiment of the present invention that achieves the above object has a waterproof structure with a speaker inside, and the housing has a surface with a plurality of small holes, and the speaker is on the surface. A waterproof sheet is attached to the speaker mounting surface of the casing, a spacer is interposed between the waterproof sheet and the casing, and the speaker is fixed to the casing. An intermediate metal fitting is interposed between the presser metal fitting and the waterproof sheet.

  In the portable housing according to the first to third embodiments according to the present invention, the intermediate fitting communicates the first space surrounded by the waterproof sheet and the speaker with the second space surrounded by the inner wall of the housing. At least one slit is provided.

  A method of assembling a speaker in a waterproof portable housing according to the present invention that achieves the above object includes a step of attaching a spacer to a housing having a plurality of small holes in the facing surface of the speaker, and the spacer on the housing. Attaching the waterproof sheet via the step, attaching the waterproof sheet to the housing with an intermediate fitting, fixing the speaker to the intermediate fitting, and using the presser fitting to attach the speaker to the speaker And fixing to the housing.

  According to the present invention, even when the portable housing having a waterproof structure provided with a speaker is moved to a place where the ambient temperature is different, the indoor temperature is considerably higher than the outdoor temperature by providing the spacer. When the casing is moved from the outdoor to the indoor, the waterproof sheet does not contact the casing. When the casing is moved from the indoor to the outdoor, the waterproof sheet does not contact the diaphragm (cone) of the speaker. As a result, it is possible to provide a portable housing capable of satisfactorily propagating sound waves output from the speaker outside the housing without reducing the sound from the speaker, and a method for assembling the speaker in the portable housing. .

  Further, according to the present invention, even if a waterproof portable housing having a speaker inside is moved to a place where the ambient temperature is different, the waterproof sheet does not bend by providing the intermediate metal fitting. In addition, it is possible to provide a portable housing capable of satisfactorily propagating sound waves output from the speaker to the outside of the housing without reducing the sound from the speaker, and a method for assembling the speaker in the portable housing.

  Further, according to the present invention, the first space surrounded by the waterproof sheet and the speaker is provided with the slit in the intermediate metal fitting and communicated with the second space surrounded by the inner wall of the housing. Since there is no difference in pressure between (P1) and the second pressure (P2) in the second space (P1 = P2), and P1> P2 when there is no communication, the speaker diaphragm (cone) is connected to the speaker. The sound from the speaker is reduced by being pushed inward (to the sound source side), and the sound wave output from the speaker cannot be propagated to the outside of the housing satisfactorily. A portable housing and a portable housing that can properly propagate sound waves output from the speaker without reducing the sound from the speaker without pushing the speaker's diaphragm (cone) inwardly. A set of speakers on the carrying case The method can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of a speaker mounting portion of a housing according to the present invention, and FIG. 2 is a perspective view showing details inside the housing of the speaker mounting portion shown in FIG. A case 11 shown in part in FIGS. 1 and 2 is a waterproof portable case having a speaker 12 therein. The speaker 12 is a cone-shaped speaker having a conical diaphragm. The speaker 12 moves in a conical diaphragm 17 according to a change in the current flowing through the coil by a magnet and a coil (not shown). To make a sound.

  The speaker 12 is fixed to the casing 11 with screws 14A and 14B via intermediate fittings 19A and 19B and presser fittings 13A and 13B so that the speaker 12 does not move by an external force due to carrying when the casing 11 is moved. A plurality of small holes 15 penetrating the housing 11 are formed on the inner surface of the housing 11 facing the speaker 12. A waterproof sheet 16 is attached to the inner surface of the housing 11 via a spacer 18.

  The casing 11 is provided with a plurality of small holes 15 that radiate from the center of the cone 17 as vent holes that release sound waves generated by the vibration of the cone 17 of the speaker 12 to the outside of the casing 11. As shown in FIG. 2, the spacer 18 has a ring shape and is attached to the center of the plurality of small holes 15. The waterproof sheet 16 is a square resin sheet having a thickness of about 0.1 mm, and is fixed to the inner wall of the housing 11 by a double-sided tape. The range of the double-sided tape is only around the waterproof sheet 16, and the range where sound is emitted from the speaker 12, that is, the central part of the waterproof sheet 16 is floated from the housing 11 by the spacer 18 and is separated from the double-sided tape.

  The space 18 is secured between the waterproof sheet 16 and the housing 11 by the spacer 18, and the vibration generated by the speaker 12 is propagated to the outside of the housing 11 through the space A and the small hole 15. The sound of the speaker 12 will not be reduced even if it is moved to a place with a different atmosphere. More specifically, by providing the spacer 18, when the casing 11 is moved from the outdoor to the indoor when the indoor temperature is considerably higher than the outdoor temperature as in winter, the waterproof sheet 16 is attached to the casing 11. When the housing is moved from the indoor to the outdoor, the waterproof sheet 16 does not come into contact with the cone 17 of the speaker 12, and as a result, the sound wave output from the speaker 12 is reduced without reducing the sound from the speaker 12. It becomes possible to propagate well outside the housing 11.

  The intermediate fitting 19 is rounded in a range where sound is emitted from the speaker 12, and four slits 20 are provided in four radial directions larger than the outer shape of the speaker 12. The looseness of the waterproof sheet 16 that occurs in the work of attaching the waterproof sheet 16 is suppressed by the round hole of the intermediate metal fitting 19 to give tension to the waterproof sheet 16. Thus, the intermediate metal fitting 19 gives tension to the waterproof sheet 16. The slits 20 shown in FIG. 2 are provided at a total of four locations every 90 degrees, but these slits may be provided at least at one location. The speaker 12 is fixed to the housing 11 with screws 14A and 14B by presser fittings 14A and 14B through an intermediate fitting 19.

  The portable housing 11 having the structure shown in FIGS. 1 and 2 is provided with a gap between the housing 11 and the waterproof sheet 16 by the spacer 18, and is attached to the waterproof sheet 16 by the intermediate metal fitting 19. Therefore, the vibration of the cone 17 of the speaker 12 can be transmitted to the waterproof sheet 16. That is, even when the atmospheric pressure inside the casing 11 becomes higher than the outside, the waterproof sheet 16 does not stick to the casing 11, and therefore it is difficult to transmit the vibration of the cone 17 of the speaker 12 to the outside of the casing 11. Can be prevented.

  In addition, as shown in FIG. 1, the intermediate bracket 19 has at least one slit 20 that communicates the first space B surrounded by the waterproof sheet 16 and the speaker 12 with the second space C surrounded by the inner wall of the housing 11. Is cut, the slit 20 is not cut, and the first space A and the second space B are not communicated with each other, P1> P2, so that the cone 17 of the speaker 12 faces the inward direction of the speaker 12. The sound from the speaker 12 is reduced by being pushed by the (sound source side), and the sound wave output from the speaker 12 cannot be propagated well outside the housing 11, but the slit 20 is cut and the first space A and the first space A Since P1 = P2 by communicating with the two spaces B, it is possible to prevent the cone 17 from shaking without being pushed inward (sound source side) of the speaker 12 and from the speaker 12. The acoustic waves output from the speaker 12 without reducing the sound can be satisfactorily propagate outside of the housing.

  3A and 3B are diagrams showing an assembly procedure of the speaker mounting portion shown in FIG. 1, wherein FIG. 3A is a diagram showing a step of attaching a spacer to the housing, and FIG. 3B is a diagram showing a step of attaching a waterproof sheet. Yes, (C) is a diagram showing a step of attaching a waterproof sheet with an intermediate fitting, (D) is a diagram showing a step of attaching a speaker to the intermediate fitting, and (E) is a step of attaching a presser fitting. FIG. 1 and 2, the speaker is assembled to the waterproof portable housing according to the embodiment of the present invention by attaching a double-sided tape to the speaker mounting surface of the housing 11 (see FIG. Assemble in the order shown in A), (B), (C), (D) and (E).

In the first step, as shown in FIG. 3A, the spacer 18 is attached to the housing 11 in which a plurality of small holes 15 are formed on the facing surface of the speaker 12.
In the second step, as shown in FIG. 3B, the waterproof sheet 16 is attached to the housing 11 via the spacer 18.
In the third step, as shown in FIG. 3C, the waterproof sheet 16 is attached to the housing 11 with the intermediate metal fitting 19.
In the fourth step, the speaker 12 is fixed to the intermediate bracket 19 as shown in FIG.
In the fifth step, as shown in FIG. 3E, the speaker 12 is fixed to the housing 11 with screws 14A and 14B using the presser fittings 13A and 13B.

It is sectional drawing of the speaker attachment part of the housing | casing by this invention. It is a perspective view which shows the detail inside the housing | casing of the speaker attachment part shown in FIG. It is a figure which shows the assembly procedure of the speaker attachment part shown in FIG. 1, (A) is a figure which shows the step which attaches a spacer to a housing | casing, (B) is a figure which shows the step which attaches a waterproof sheet, (C) is a diagram showing a step of attaching a waterproof sheet with an intermediate fitting, (D) is a diagram showing a step of attaching a speaker to the intermediate fitting, and (E) is a diagram showing a step of attaching a presser fitting. . It is sectional drawing of the speaker attachment part of the housing | casing by a prior art.

Explanation of symbols

11 Housing 12 Speaker 13A, 13B Presser fitting 14A, 14B Screw 15 Small hole 16 Waterproof sheet 17 Diaphragm (cone)
18 Spacer 19 Intermediate bracket 20 Slit

Claims (5)

In a waterproof portable housing with a speaker inside,
The housing has a surface with a plurality of small holes, and a speaker is attached to the surface.
A waterproof sheet is attached to the speaker mounting surface of the housing,
A spacer is interposed between the waterproof sheet and the housing.
A portable housing characterized by that. In a waterproof portable housing with a speaker inside,
The housing has a surface with a plurality of small holes, and a speaker is attached to the surface.
A waterproof sheet is attached to the speaker mounting surface of the housing,
An intermediate bracket is interposed between the presser fitting for fixing the speaker to the housing and the waterproof sheet.
A portable housing characterized by that. In a waterproof portable housing with a speaker inside,
The housing has a surface with a plurality of small holes, and a speaker is attached to the surface.
A waterproof sheet is attached to the speaker mounting surface of the housing,
A spacer is interposed between the waterproof sheet and the casing, and an intermediate bracket is interposed between the presser fitting for fixing the speaker to the casing and the waterproof sheet.
A portable housing characterized by that. The intermediate fitting is provided with at least one slit communicating the first space surrounded by the waterproof sheet and the speaker with the second space surrounded by the inner wall of the housing.
The portable housing according to claim 2 or 3. In the method of assembling a speaker to a waterproof portable case,
Attaching a spacer to a housing having a plurality of small holes on the facing surface of the speaker;
Attaching a waterproof sheet to the housing via the spacer;
Tightening the waterproof sheet to the housing with an intermediate metal fitting,
Fixing the speaker to the intermediate fitting;
Fixing the speaker to the housing using the presser fitting;
A method for assembling a speaker to a portable housing, comprising:

Images