JP2009005043A - Sound hole waterproofing/drainage structure of portable electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound hole waterproofing/drainage structure of a portable electronic device which prevents water from being accumulated in front of an acoustic component. <P>SOLUTION: Behind a case body 1, roughly planar packing 2 with a loop-shaped rib 2a and a mortar-shaped part 2b projected in the projecting direction of the rib 2a is arranged such that the mortar-shaped part 2b faces an acoustic opening hole 1a provided to the case body 1, the rib 2a is brought into press-contact with the case body 1 and a part surrounded by the rib 2a is separated from the case body 1. At least one opening hole 1b is provided near the rib 2a in the part surrounded by the loop-shaped rib 2a of the case body 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sound hole waterproof / drainage structure for portable electronic devices such as portable radio devices.

  In a portable electronic device having a conventional acoustic device such as a microphone or a speaker, one or a plurality of acoustic openings are provided. A thin waterproof film or packing that closes the opening is provided so that water does not enter the housing from the opening.

  Japanese Patent Application Laid-Open No. 2000312156 discloses a case in which a waterproof film is attached to the housing so that water does not enter the inside of the housing from an acoustic opening hole in front of the microphone disposed inside the housing. . A cover is provided at a position facing the opening hole on the outside of the housing, and an opening that communicates with the opening hole is formed at a position facing the top and bottom or left and right of the cover. The cover is substantially the same size as the opening hole, and slightly protrudes outward from the housing surface.

Moreover, the housing | casing surface of the end surface of one opening part is raised, and the housing | casing surface of the end surface of the other opening part is not raised. With this configuration, when water enters from the opening hole and accumulates outside the waterproof film, the water is discharged from the other opening by blowing in from one opening. Since the end face of the opening is raised, the structure is such that water does not easily enter from the opening when there is little rain.
Japanese Patent Application Laid-Open No. 2004-312156, paragraphs 0012 to 0015, FIGS. 1 and 2

  In the acoustic drainage structure disclosed in Japanese Patent Application Laid-Open No. 2000312156 described above, the waterproof film in front of the microphone, which is an acoustic component, is formed on a plane perpendicular to the acoustic component direction. When water enters from the hole, water accumulates in front of the acoustic component due to surface tension. And in order to discharge | emit this water, you must breathe in and a troublesome operation | work is needed.

  In addition, the acoustic component does not exhibit its original performance in a state where water has accumulated before the acoustic component. Furthermore, if water repeatedly accumulates in front of the acoustic component, or if the water is not drained for a long period of time, the waterproof membrane may be adversely affected.

  The present invention has been made in view of the above points, and an object thereof is to provide a sound hole waterproof / drainage structure for a portable electronic device in which water does not collect in front of an acoustic component. .

  The sound hole waterproofing / drainage structure of the portable electronic device according to the present invention includes a substantially plate-shaped packing having a loop-shaped rib and a mortar-shaped portion protruding in a protruding direction of the rib at the back of the casing. The portion is opposed to the acoustic aperture provided in the housing, the rib is pressed against the housing, and the portion surrounded by the rib is disposed away from the housing, and the loop shape of the housing is At least one opening hole is provided in the vicinity of the rib surrounded by the rib.

  Further, in the sound hole waterproof / drainage structure of the portable electronic device, an inclined surface is provided that approaches the housing from the mortar-shaped portion of the packing toward the opening hole.

  Further, in the sound hole waterproof / drainage structure of each portable electronic device, the opening hole is provided at a position directly below the acoustic opening hole in a normal use state of the portable electronic device.

  In the sound hole waterproof / drainage structure of the portable electronic device, an ECM is disposed behind the mortar-shaped portion.

  Further, in the sound hole waterproof / drainage structure of each portable electronic device, a speaker is disposed behind the mortar-shaped portion.

  According to the sound hole waterproofing / drainage structure of the portable electronic device of the present invention, water does not accumulate in front of the acoustic component, so that the sound is hardly trapped and the performance of the acoustic component is not impaired.

  In addition, even when water enters the acoustic opening hole, the other opening hole acts as a sound path, so that sound conduction between the acoustic component and the outside of the housing is not impaired.

  The best mode for carrying out the present invention will be described below with reference to examples.

  FIG. 1 is a sectional view showing a sound hole waterproof / drainage structure of a portable electronic device according to an embodiment of the present invention. A substantially plate-shaped packing 2 is arranged behind the housing 1 provided with the acoustic aperture 1a and the aperture 1b shown in FIG. 1, and a loop-like rib 2a of the packing 2 is formed on the inner surface of the housing 1 by the holder 4. It is held so as to be pressed.

  As shown in detail in FIG. 2, the acoustic opening hole 1a and the opening hole 1b of the housing 1 are opened within a range surrounded by the rib 2a, and the opening hole 1b is acoustic in a normal use state shown in FIG. It is located below the opening hole 1a.

  And as shown in FIG. 1, the mortar shape part 2b provided in the packing 2 is located behind the acoustic opening hole 1a so that it may protrude in the acoustic opening hole 1a direction. A thick part 2d is formed at the top of the bowl-shaped part 2b.

  An ECM (electric condenser microhon) 3 supported by the holder 4 is located behind the mortar-shaped portion 2b.

  The range surrounded by the ribs 2 a of the packing 2 is away from the casing 1, and a gap is formed between the casing 1 and the casing 2. There is no gap between the gap and the inside of the casing behind the packing 2, and the packing 2 has a waterproof function. An inclined surface 2c that is inclined so that the lower side approaches the inner surface of the casing 1 is provided between the position facing the opening hole 1b from below the mortar-shaped portion 2b on the surface of the packing 2.

  In the above configuration, the sound transmitted from the outside through the acoustic aperture 1a or the aperture 1b is transmitted to the ECM 3 by vibrating the bowl-shaped portion 2b. The space in front of the ECM 3 behind the bowl-shaped part 2b becomes an acoustic cavity, but the thick part 2d of the bowl-shaped part 2b improves the acoustic characteristics of the acoustic cavity.

  Water that has entered the gap between the housing 1 and the packing 2 from the acoustic opening 1a as indicated by an arrow A passes around the mortar-shaped portion 2b as indicated by an arrow B and opens as indicated by an arrow C by gravity. It flows in the direction of the hole 1b. For this reason, the invading water does not accumulate in the vicinity of the bowl-shaped portion 2b, and the sound quality is maintained.

  The water collected in the vicinity of the opening hole 1b is discharged to the outside from the opening hole 1b as indicated by an arrow D by pressure due to gravity. The opening hole 1b is formed in a long hole in order to improve drainage performance. In this way, the water that has entered from the acoustic opening hole 1a in the state of use is naturally discharged without any work for discharging. When water does not accumulate in the vicinity of the opening hole 1b, the opening hole 1b also acts as a sound path, so that the sound is prevented from being trapped.

  The embodiment is configured as described above, but the invention is not limited to this. For example, the invention can be used for a speaker instead of a microphone.

  Further, the number of opening holes is not limited to one, and those used in two or more postures may be provided at positions below the acoustic opening holes 1a in each use state.

It is sectional drawing which shows the sound hole waterproofing / drainage structure of the portable electronic device which is an Example of this invention. It is a front view which shows the part of the sound hole waterproofing / drainage structure. It is a perspective view which shows the external appearance of a sound hole waterproofing / drainage structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing, 1a Sound opening hole, 1b Opening hole 2 Packing, 2a Rib, 2b Mortar shape part, 2c Inclined surface, 2d Thick part 3 ECM
4 Holder

Claims (5)

A substantially plate-shaped packing having a loop-shaped rib and a mortar-shaped portion protruding in the protruding direction of the rib behind the housing, the mortar-shaped portion facing an acoustic opening hole provided in the housing, The rib is press-contacted to the casing, and the portion surrounded by the rib is disposed so as to be separated from the casing, and at least one opening is provided in the vicinity of the rib surrounded by the loop-shaped rib of the casing. Sound hole waterproof / drainage structure for portable electronic devices, characterized by holes. The sound hole waterproof / drainage structure for a portable electronic device according to claim 1, wherein an inclined surface that approaches the housing is provided from a mortar-shaped portion of the packing toward the opening hole. The sound hole waterproofing / drainage structure for a portable electronic device according to claim 1 or 2, wherein the opening hole is provided at a position directly below the acoustic opening hole in a normal use state of the portable electronic device. The sound hole waterproof / drainage structure for a portable electronic device according to any one of claims 1 to 3, wherein an ECM is disposed behind the mortar-shaped portion. The sound hole waterproofing / drainage structure for a portable electronic device according to any one of claims 1 to 3, wherein a speaker is disposed behind the mortar-shaped portion.

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