JP3818280B2 - Speaker mounting structure - Google Patents

Description

  The present invention relates to a speaker mounting structure used in various electronic devices such as an electronic camera and a mobile phone.

  2. Description of the Related Art Conventionally, a speaker mounting structure incorporated in an electronic device is provided with a sound emitting hole portion including a plurality of sound emitting holes on one surface of the device case, and the speaker is connected to the sound emitting hole portion with a speaker holding member inside the device case. There is a structure attached to. In this case, the speaker holding member is formed in a disc shape having a ring-shaped flange portion, and the speaker is mounted in the disc-shaped recess, and the ring is in a state where the speaker corresponds to the sound emitting hole portion. The tip end surface of the hook-shaped butt is brought into contact with the inner surface of the device case and is disposed in the device case.

However, with such a speaker mounting structure, the sound generated by the speaker can be emitted to the outside from the sound emission hole portion of the device case, but the sound generated by the speaker is simply emitted from the sound emission hole portion. Therefore, there is a problem that sufficient sound quality cannot be obtained. In particular, of the sound generated by the speaker, the sound emitted toward the back side of the speaker, that is, the side opposite to the sound emitting surface side of the speaker is diffused into the device case and leaks from the gaps in the device case. There is a problem that the sound quality on the side of the sound range is degraded. Also, when the equipment case is a metal case, the joint of the case is the end face of the sheet metal compared to a resin case with good airtightness, so the airtightness is poor and a gap is created, and sound leaks from the gap. It was easy.
Japanese Patent Laid-Open No. 11-4493

  The problem to be solved by the present invention is that sufficient sound quality cannot be obtained because the sound generated by the speaker is directly emitted from the sound emitting hole.

The invention according to claim 1 includes a device case having a sound emitting hole, a speaker holding member disposed in the device case, and a speaker attached to the speaker holding member, wherein the device case is a front surface. The speaker holding member closes the gap between the front case and the rear case, and the speaker holding member forms a resonance space of the speaker in the device case. This is a speaker mounting structure.

  The invention according to claim 2 is the speaker mounting structure according to claim 1, wherein the resonance space is formed on the side opposite to the sound emitting surface side of the speaker.

  According to a third aspect of the present invention, the resonance space is formed on the side opposite to the sound emitting surface side of the speaker in the device case by the speaker holding member and a circuit board provided in the device case. The speaker mounting structure according to claim 2.

  According to a fourth aspect of the present invention, the speaker is disposed in a state where the sound emitting surface side is opposed to one surface of the device case, and the sound emitting hole portion is opposed to the sound emitting surface side of the speaker. The speaker mounting structure according to claim 1, wherein the speaker mounting structure is provided on a side surface of the device case adjacent to the one surface of the case.

According to the first aspect of the present invention, when the sound generated by the speaker is emitted from the sound emitting hole of the device case to the outside, the speaker is formed in the resonance space of the speaker formed in the device case by the speaker holding member. Can be made to resonate and thereby the sound quality of the sound emitted from the sound emission hole can be improved, so that sufficient sound quality can be obtained. In addition, because the speaker holding member closes the gap between the front case and the rear case, the sound emitted toward the opposite side of the speaker's sound emission side leaks from the gap between the front case and the rear case. This also improves the sound quality.

  According to the second aspect of the present invention, since the resonance space is formed on the side opposite to the sound emitting surface side of the speaker, the sound emitted toward the side opposite to the sound emitting surface side of the speaker is It is possible to resonate well in the resonance space without leaking from the gaps of the case, thereby improving the sound quality on the low frequency range side.

  According to the third aspect of the present invention, the resonance space is formed on the side opposite to the sound emitting surface side of the speaker in the device case by the speaker holding member and the circuit board in the device case. The resonant space formed on the side opposite to the sound surface side can be formed in an optimum volume by the circuit board, and this allows the sound emitted toward the side opposite to the sound emitting surface side of the speaker to resonate well. Therefore, the sound quality on the low frequency side can be optimized.

  According to the fourth aspect of the present invention, the sound emitting hole is provided on the side surface of the equipment case adjacent to the one surface of the equipment case facing the sound emitting surface side of the speaker, so that the sound emitting surface side of the speaker is Even if it faces one side of the device case, the sound of the speaker can be emitted from the side surface of the device case adjacent to the one side of the device case. Since the mounting direction and mounting position of the speaker in the device case are not restricted, the speaker can be freely installed in the device case.

Hereinafter, an embodiment in which the speaker mounting structure of the present invention is applied to an electronic camera will be described with reference to FIGS.
1 is a perspective view of the electronic camera of the present invention as viewed from the front side, FIG. 2 is a perspective view of the electronic camera as viewed from the rear side, and FIG. 3 is an enlarged cross-sectional view taken along the line AA in FIG. FIG. 5 is an enlarged cross-sectional view taken along the line B-B in FIG. 3, and FIG. 5 is an enlarged bottom view of the main part of the electronic camera of FIG.
The electronic camera includes a camera body 1 as shown in FIGS. The camera body 1 includes a front case 2 and a rear case 3, and the front case 2 and the rear case 3 are formed of a thin metal plate having high rigidity such as stainless steel.

  As shown in FIG. 1, a photographing unit 4 is provided at the upper right corner of the front surface of the camera body 1, that is, the front surface of the front case 2, and an optical finder 5 and a microphone unit 6 are provided at a position on the left side. A strobe light emitting unit 7 is provided at a position that is provided side by side and positioned further to the left. On the left side of the upper surface of the camera body 1 (the right side of the upper surface in FIG. 2), a shutter button 8 and a power button 9 are provided side by side.

  Further, as shown in FIG. 2, a display unit 10 is provided at a position on the left side of the rear surface of the camera body 1, that is, the rear surface of the rear case 3 (front surface in FIG. 2), and is positioned on the right side thereof. At a plurality of locations, various menu keys 11 to 13 are provided side by side vertically and horizontally. A cursor key 14 that can be operated in a cross direction is provided at a position located on the lower right side of these various menu keys 11 to 13, and a front case 2 side is located at a position located on the upper side of the display unit 10. A continuous optical finder 5 is provided.

  On the other hand, inside the camera body 1, as shown by a dotted line in FIG. 1, the speaker unit 15 is located below the photographing unit 4 and is disposed corresponding to the back surface of the display unit 10. As shown in FIGS. 3 to 5, the speaker unit 15 includes a sound emitting hole 16 provided on the lower surface of the camera body 1, that is, the lower surface of the front case 2, and a sound emitting hole provided inside the camera body 1. A speaker holding member 17 that surrounds the portion 16 together with the front case 2 of the camera body 1, a speaker 18 attached to the speaker holding member 17, and a circuit board 19 that is disposed in the camera body 1 and closes the lower portion of the speaker holding member 17. It has a configuration with.

  In this case, the speaker holding member 17 is made of a synthetic resin having elasticity, such as silicone rubber. As shown in FIGS. 3 and 4, the speaker holding member 17 surrounds the speaker 18 and has a U-shaped first opening with the sound emitting hole 16 side open. 1 frame portion 20, a mounting portion 21 provided at the bottom of the first frame portion 20 for mounting the speaker 18 and having an insertion hole into which the back surface portion of the speaker 18 is inserted, and the outer periphery of the first frame portion 20 And a second frame portion 22 that protrudes from the mounting portion 21 toward the rear case 3 and is formed integrally with the mounting portion 21. In this case, as shown in FIG. 4, the second frame portion 22 is formed in a substantially square frame shape as a whole, and the first frame portion on the front side of the front case 2 at the lower right corner of the frame shape. 20 and the mounting portion 21 are formed, and as a result, the resonance space 23 is formed from the back surface side of the mounting portion 21 to the outer peripheral side of the first frame portion 20 as shown in FIG.

  That is, as shown in FIGS. 3 and 4, the speaker holding member 17 is mounted by mounting the speaker 18 on the mounting portion 21 by inserting the back surface portion of the speaker 18 into the insertion hole of the mounting portion 21. In this state, the side surfaces of the first and second frame portions 20 and 22 are arranged in contact with the respective side surfaces located at the lower right corner of the front case 2, and in this state, one end surface of the second frame portion 22 (FIG. 3). Then, each right end surface) is elastically brought into close contact with one surface of the circuit board 19 (the left side surface in FIG. 3) disposed in the camera body 1 so that the second frame is interposed between the front case 2 and the circuit board 19. A resonance space 23 is formed by the portion 22, and a gap between the front case 2 and the rear case 3 located at the lower right corner of the device case 1 is closed by a side surface of the second frame portion 22. Further, the speaker holding member 17 is configured so that each end face (each left end face in FIG. 3) of the first and second frame portions 20 and 22 is brought into close contact with the inner front face of the front case 2 so as to be in close contact therewith. 2 and the mounting portion 21 are configured to form a space portion 24 that guides the sound generated by the speaker 18 to the sound emitting hole portion 16 by the first frame portion 20.

  As shown in FIG. 3, the speaker 18 has a sound emitting surface facing the inner front surface of the front case 2 and a rear surface portion inserted into an insertion hole provided in the placement portion 21 of the speaker holding member 17. Thus, it is arranged on the placement portion 21 of the speaker holding member 17. As shown in FIG. 4, the sound emitting hole portion 16 has a plurality of sound emitting holes 16 a, and as shown in FIG. 3, the front case adjacent to the front surface of the front case 2 facing the sound emitting surface side of the speaker 18. 2, that is, provided on the lower surface of the front case 2 that is orthogonal to and adjacent to the front surface of the front case 2, and thereby is configured to emit the sound of the speaker 18 to the outside from the lower surface side of the camera body 1. . The circuit board 19 is mounted with various electronic components (not shown) for configuring the electronic circuit of the entire electronic camera, and is arranged in the rear case 3 of the camera body 1.

  In such an electronic camera, when a subject is photographed by the photographing unit 4 while looking through the optical finder 5, an image of the subject is displayed on the display unit 10, and sound at the time of photographing is captured by the microphone unit 6 and captured. By reproducing the sound with the speaker unit 15, it is possible to hear the sound emitted by the speaker unit 15 while viewing the captured image displayed on the display unit 10. That is, when the speaker 18 of the speaker unit 15 generates sound, the sound is guided through the space 24 formed by the speaker holding member 17 and the camera body 1 and is externally transmitted from the sound emitting hole 16 on the lower surface of the camera body 1. Therefore, even when the speaker 18 faces the front surface of the camera body 1 and faces away from the display unit 10, the sound of the speaker 18 can be heard well while viewing the image displayed on the display unit 10. be able to.

  As described above, according to the speaker mounting structure of the electronic camera, the speaker holding member 17 is arranged in the camera main body 1, so that the speaker 18 is placed in the camera main body 1 by the second frame portion 22 of the speaker holding member 17. Since the resonance space 23 is formed on the side opposite to the sound emitting surface side of the speaker 18, the sound generated by the speaker 18 can be resonated in the resonance space 23. For this reason, the sound emitted toward the opposite side of the sound emitting surface side of the speaker 18 does not leak from the gap between the camera body 1, for example, the gap between the front case 2 and the rear case 3, and resonates in the resonance space 23. Therefore, it is possible to improve the sound quality on the low frequency range side, thereby obtaining a sufficient sound quality.

  In this case, in particular, one end surface (each right end surface in FIG. 3) of the second frame portion 22 of the speaker holding member 17 is elastic on one surface (left side surface in FIG. 3) of the circuit board 19 disposed in the camera body 1. Since the resonance space 23 is formed by the second frame portion 22 between the front case 2 and the circuit board 19 by being in close contact with each other, it is formed on the side opposite to the sound emitting surface side of the speaker 18. The resonance space 23 can be formed in an optimal volume by the circuit board 19, and thus the sound emitted toward the opposite side of the sound emission surface side of the speaker 18 can be satisfactorily resonated in the resonance space 23. Therefore, the sound quality on the low frequency side can be optimized.

  In this speaker mounting structure, the sound emitting hole 16 is adjacent to the front surface of the camera body 1 adjacent to the front surface of the camera body 1 facing the sound emitting surface side of the speaker 18, that is, adjacent to the front surface of the front case 2. By being provided on the lower surface of the front case 2, the sound of the speaker 18 is released from the lower surface side of the front case 2 even when the speaker 18 faces the front surface of the front case 2 and faces away from the display unit 10. In addition to being able to hear the sound of the speaker 18 while looking at the display unit 10 and the mounting direction and mounting position of the speaker 18 in the camera body 1 are not restricted, the speaker 18 is connected to the camera body 1. It can be installed freely inside.

  In the above embodiment, the space portion 24 that guides the sound of the speaker 18 to the sound emitting surface side of the speaker 18 is formed in the camera body 1 by the first frame portion 20 and the mounting portion 21 of the speaker holding member 17. The space 24 may be formed in the resonance space. In this way, the sound generated by the speaker 18 can be resonated in the space 24 and emitted to the outside from the sound emitting hole 16, so that the sound quality on the high sound range side can be improved.

  In the above embodiment, one end surface (the right end surface in FIG. 3) of the second frame portion 22 of the speaker holding member 17 is elastically contacted with one surface (the left side surface in FIG. 3) of the circuit board 19 in the camera body 1. The resonance space 23 is formed between the front case 2 and the circuit board 19 by being in close contact with each other. However, the present invention is not limited to this. For example, one end surface of the second frame portion 22 of the speaker holding member 17 (in FIG. A structure in which a resonance space 23 is formed between the front case 2 and the rear case 3 by elastically contacting the right end surface) to the inner surface of the rear case 3 of the camera body 1 may be used.

  Moreover, in the said embodiment, although the 2nd frame part 22 of the speaker holding member 17 was formed in the shape open | released by the front and back both surface side, it is not restricted to this, For example, as shown in FIG. The closed portion 25 may be integrally formed on the front surface side (left end surface side in FIG. 6) of the two frame portions 22, and the back surface side (right end surface side in FIG. 6) of the second frame portion 22 of the speaker holding member 17. Alternatively, a structure in which a closing portion (not shown) is integrally formed may be used. In this way, the sound of the speaker 18 can be resonated by further improving the sealing property of the resonance space 23.

  Furthermore, in the above-described embodiment, the case where the electronic device provided with the speaker 18 is applied to an electronic camera has been described. It can be widely applied to various electronic devices.

It is the perspective view which looked at the electronic camera which applied the speaker mounting structure of this invention from the front side. It is the perspective view which looked at the electronic camera of FIG. 1 from the rear surface side. It is an expanded sectional view in the AA arrow of FIG. It is an expanded sectional view in the BB arrow view of FIG. It is the expanded bottom view of the principal part which looked at the camera main body of FIG. 3 from the lower surface side. It is the expanded sectional view of the principal part which showed the modification of the speaker holding member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Camera body 2 Front case 3 Rear case 15 Speaker part 16 Sound emission hole part 17 Speaker holding member 18 Speaker 19 Circuit board 20 1st frame part 21 Mounting part 22 2nd frame part 23 Resonance space 24 Space part

Claims (4)

A device case having a sound emitting hole, a speaker holding member disposed in the device case, and a speaker attached to the speaker holding member;
The device case includes a front case and a rear case, and the speaker holding member closes a gap between the front case and the rear case, and the speaker holding member forms a resonance space of the speaker in the device case. A speaker mounting structure characterized by that.   The speaker mounting structure according to claim 1, wherein the resonance space is formed on a side opposite to a sound emitting surface side of the speaker.   The resonance space is formed on the opposite side of the sound emitting surface side of the speaker in the device case by the speaker holding member and a circuit board provided in the device case. The speaker mounting structure described.   The speaker is disposed in a state in which a sound emitting surface side is opposed to one surface of the device case, and the sound emitting hole portion is adjacent to the one surface of the device case facing the sound emitting surface side of the speaker. The speaker mounting structure according to claim 1, wherein the speaker mounting structure is provided on a side surface of the case.

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