JP2004312156A - Drainage structure of acoustic opening - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acoustic opening provided with both drainage performance and a protective function. <P>SOLUTION: A waterproof membrane 14 is provided to an open hole 12 that is opened for an acoustic purpose to prevent water or the like from leaking to the inside from the open hole 12, a cover part 16 is placed at a position opposed to the open hole 12 at a prescribed interval therefrom, and openings 18, 20 communicatively connected to the open hole 12 are respectively formed to two positions vertically or horizontally opposed to the cover part 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is directed to, for example, drainage of a sound opening provided with a waterproof film in order to prevent water or the like from entering into the opening for sound in a portable terminal device or the like. Regarding the structure, in particular, if water adheres to the acoustic opening of the portable terminal due to, for example, submergence or rainfall, the surface tension of the water causes a water film or water to stay, thereby inhibiting sound pressure transmission. The present invention relates to a drainage structure for an acoustic opening that can reduce the occurrence of water film and water stagnation, and can easily remove even if water film and water stagnation occurs. .
[0002]
[Prior art]
Today, many portable terminals have a waterproof function and can be used even in an environment such as rainfall. However, in a device such as a portable terminal device having an acoustic component (a speaker, a microphone, or the like), an opening for sound is provided at an appropriate position in the housing. The opening is formed by forming one or more holes in the same direction in the housing, and the opening is provided with a waterproof film in order to prevent water from entering the inside of the housing from here. It is common that it is stuck.
[0003]
[Problems to be solved by the invention]
However, in the conventional device, when the opening is wet with water, a water film is formed in the opening due to the surface tension of the water, which affects sound quality. Therefore, in order to remove the water film, it is often performed to blow one or a plurality of holes constituting the opening, but in a conventional device, when one hole is provided, the air is blown. Since the direction and the direction of discharging water from the opening are the same, the drainage is not good. Further, when there are a plurality of holes, the flow path of the air (breath) is not determined, so that the air that has entered from all the openings does not always flow out, and a water film or stagnant water may remain. . Further, since the flow velocity of the air generated by blowing the air is not stable, the water is not always drained reliably.
[0004]
Furthermore, it is known to attach a highly water-repellent paint or component around the opening to make it difficult for water droplets to adhere, but there are problems such as poor durability and high cost. .
[0005]
In addition, the waterproof film attached to the opening has a low strength and needs to be protected against external damage.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and makes it possible to easily remove a water film attached to an acoustic opening of a portable terminal device and to mechanically protect a waterproof film. It is an object of the present invention to provide a drainage structure for an acoustic opening capable of performing the following.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problem, the present invention provides an acoustic opening in which a waterproof film is attached to an opening hole opened for sound so as to prevent water or the like from entering the inside from the opening hole. In the drainage structure, a cover portion is provided at a position facing the opening hole at a predetermined interval, and openings communicating with the opening hole are formed at two positions facing the upper and lower or left and right of the cover portion. It is characterized by having.
[0008]
Further, in the present invention, the cover portion is provided at a position protruding slightly outward from the surface of the enclosure at a predetermined distance from the opening hole and having substantially the same size as the opening hole. It is characterized by the following.
[0009]
Further, in the present invention, the vicinity of the end of the enclosure located at one end of the cover is raised so as to be higher than the surface of the cover, and the vicinity of the end of the enclosure at the other end is defined as the cover. It is characterized in that it has almost the same height as the surface.
[0010]
Further, in the present invention, the surface of the cover portion and the surface of an enclosure located at one end side of the cover portion are inclined at substantially the same angle toward the inside of the device.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking an example of a drainage structure of an acoustic opening of a portable terminal.
Embodiment 1 FIG.
FIG. 1 is a schematic diagram of the first embodiment.
In the embodiment shown in FIG. 1, an opening 10 for sound is opened in the enclosure 10, and the opening 10 is provided with an opening 10 of the enclosure 10 in order to prevent water or the like from entering the inside of the enclosure 10 therefrom. A waterproof film 14 is attached from the inside. At a position facing the opening hole 12, a cover portion 16 having substantially the same size as the opening hole 12 is provided at a position (outside of the opening) projecting slightly outside the surface of the enclosure 10 at a predetermined interval from the opening hole 12. Are provided, and openings 18 and 20 communicating with the opening hole 12 are formed at two positions facing the cover portion 16 and the opening hole 12 in the vertical and horizontal directions, respectively.
[0012]
In the first embodiment, the reason why the opening hole 12 and the cover portion 16 are made substantially the same size is that it is necessary to reduce the range in which a water film can be formed in order to improve drainage. This is because, if the value of 16 is larger, the range in which a water film is formed is widened and the drainage property is affected. Further, in order to protect the waterproof film 14, it is necessary to cover the opening hole 12 with the cover portion 16. If the cover portion 16 is smaller than the opening hole 12, the protection function of the waterproof film 14 cannot be secured. is there. Further, since this structure is generally formed by one part, the parts have almost the same size in production.
[0013]
In the first embodiment, since the cover portion 16 is disposed so as to protrude slightly outward from the enclosure 10, the cover portion 16 is excellent in the drainage property and the protection function of the waterproof film 14.
[0014]
Next, the operation of the first embodiment will be described.
When the opening hole 12 is submerged and filled with water, for example, when air is blown from the opening portion 18 toward the opening hole 12, an airflow as shown by an arrow 22 in FIG. 1 occurs, and the opening is performed according to Bernoulli's theorem. The water staying in the hole 12 is pulled up and discharged from the opening 20. Thereby, water can be easily removed from the opening hole 12. Conversely, when the breath is blown from the opening 20, water is similarly discharged from the opening 18.
[0015]
Further, since the cover portion 16 is configured to cover the opening hole 12 almost completely, an object does not directly collide with the opening hole 12, so that the protection function of the waterproof film 14 is also good.
[0016]
Embodiment 2 FIG.
FIG. 2 is a schematic diagram of the second embodiment.
In the second embodiment, the end of the enclosure 10 located above the cover 16 is raised so as to be located outside the cover 16, and the cover 16 and the enclosure 10 located below the cover 16 Are arranged on the same surface, and other configurations are the same as those of the first embodiment.
[0017]
Next, the operation of the second embodiment will be described.
By blowing air from opening 18 toward opening hole 12 in the same manner as in Embodiment 1, water staying in opening hole 12 is pulled up and discharged from opening 20 (conversely, breath is blown from opening 20). In the case of small rainfall, the enclosure 10 is raised, so that rainwater flows as shown by an arrow 24 in FIG. Since there is no water drop on 18 and 20, water does not accumulate in the opening hole 12 in the case of small rainfall.
[0018]
Further, since the cover portion 16 has substantially the same size as the opening hole 12, the protection function of the waterproof film 14 is also good.
[0019]
Embodiment 3 FIG.
FIG. 3 is a schematic diagram showing a third embodiment.
In the third embodiment, the surface of the cover part 16 and the surface of the enclosure 10 located above the cover part 16 are flush with each other and are inclined toward the inside of the device as going downward. Also, a microphone 26 is provided inside. The microphone 26 is fixed to the inner surface of the enclosure 10 by a microphone holder 28, and the other configuration is the same as that of the first embodiment.
[0020]
Next, the operation of the third embodiment will be described.
By blowing air from opening 18 toward opening hole 12 in the same manner as in Embodiment 1, water staying in opening hole 12 is pulled up and discharged from opening 20 (conversely, breath is blown from opening 20). Is discharged from the opening 18). In addition, since the enclosure 10 located above the cover 16 is located outside the cover 16, it is difficult for water droplets flowing through the enclosure 10 to fall on the cover 16 during rainfall or the like. There is an effect that water drops hardly enter 18 and 20.
[0021]
Further, since the cover portion 16 has substantially the same size as the opening hole 12, the protection function of the waterproof film 14 is also good.
[0022]
The present invention is not limited to the first, second and third embodiments. For example, the enclosure 10 and the cover 16 may be arranged on the same surface. In this case, the drainage from the opening hole 12 and the function of protecting the waterproof film 14 are also improved.
[0023]
Further, the cover portion 16 can be arranged on the inner side of the enclosure 10. In this case, when breathing into the opening 18 or 20 to remove the water remaining in the opening 12, the airflow may be poor and the reliability may be poor, but in the case of rainfall or the like, Since the enclosure 10 protrudes outward from the cover 16, there is a merit that water drops hardly enter the openings 18 and 20. Further, the protection function of the waterproof film 14 is also good.
[0024]
【The invention's effect】
As described above, according to the present invention, the cover portion is disposed at a position facing the opening hole at a predetermined interval, and the opening portion communicating with the opening hole is provided at two positions facing the top and bottom or left and right of the cover portion. As a result, the air passage is determined, so that if you blow from one opening, all the air will come out from the other opening, so that the water remaining in the water film and the opening hole will be surely removed. Can be removed. In addition, by defining the air passage, the velocity of the air passing through the opening can be stabilized, and the water can be easily removed. Therefore, it is possible to realize a portable terminal capable of making a call immediately even in a use environment such as submersion.
[0025]
Further, by disposing the cover portion at a position facing the opening hole, an object does not directly hit the opening hole, so that the waterproof film can be protected.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a first embodiment.
FIG. 2 is a schematic diagram of a second embodiment.
FIG. 3 is a schematic diagram of a third embodiment.
[Explanation of symbols]
12 opening holes, 14 waterproof membranes, 16 cover parts, 18, 20 openings.

Claims (4)

In the drain hole structure of the sound opening in which a waterproof film is attached in order to prevent water and the like from entering the inside of the opening hole of the enclosure opened for sound from the opening hole,
A cover portion is provided at a position facing the opening hole at a predetermined interval, and an opening communicating with the opening hole is formed at each of two positions facing the top and bottom or left and right of the cover portion. Features a drainage structure for acoustic openings. The said cover part is provided with the substantially same size as an opening hole in the position which protruded slightly outside from the surface of the said enclosure at predetermined intervals from the said opening hole, and is arrange | positioned. Item 2. A drainage structure for an acoustic opening according to Item 1. The vicinity of the end of the enclosure located at one end of the cover is raised so as to be higher than the surface of the cover, and the vicinity of the end of the enclosure at the other end has substantially the same height as the surface of the cover. The drainage structure for an acoustic opening according to claim 1, wherein: 2. The drainage structure for an acoustic opening according to claim 1, wherein a surface of the cover portion and a surface of an enclosure located at one end of the cover portion are inclined at substantially the same angle toward the inside of the device. .

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