JP2005354596A - Mobile electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent electrostatic discharging from a panel opening hole in a simple structure by reducing arrangement dimensions including an acoustic part and the panel opening hole that becomes a sound entrance/exit, in a mobile electronic apparatus comprising the acoustic part for generating or receiving sounds. <P>SOLUTION: There is provided a panel opening hole which becomes a sound entrance/exit of an acoustic part such as a receiver, speaker, buzzer and microphone for generating or receiving sounds. In such a mobile electronic apparatus, an insulating film having a film opening hole is interposed between a panel part including the panel opening hole and the acoustic part, and the film opening hole is provided while horizontally spacing away from the panel opening hole with respect to the panel part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a portable electronic device including an acoustic unit that generates or receives sound, such as a receiver and a speaker.

  Portable electronic devices having an acoustic unit such as a receiver and a speaker such as a mobile phone, PHS, and PDA are widely used. These portable electronic devices are provided with a liquid crystal display, a digital electronic circuit, a communication circuit, and the like, and have a panel opening hole as a sound entrance / exit. If static electricity jumps from the panel opening hole, the digital electronic circuit or the like malfunctions due to electrostatic discharge, or may cause a failure.

  FIG. 1 is a diagram showing a part of the external structure of a general folding mobile phone 100 in an opened state.

  In FIG. 1, the receiver 20 is provided inside the mobile phone 100 and is indicated by a broken line. A panel opening hole 11 is provided in the surface panel 10 in the surface portion of the cellular phone 100 in order to ensure a sound path with the internal receiver 20 (circular in this example). Sound is transmitted between the receiver 20 inside the mobile phone 100 and the outside through the panel opening hole 11. In addition, 12 and 13 are blind holes for adjusting the appearance.

  FIG. 4 shows an AA cross section of the conventional mobile phone 100 passing through the panel opening 11 and the receiver 20 of FIG. In FIG. 1, a wall 14 through which a receiver 20 can be inserted is provided on the back surface of the panel 10, and the receiver 20 is provided inside the wall 14 via a cushion member 30.

  When static electricity from a user of the mobile phone 100 jumps into the inside of the panel opening hole 11, a current due to static electricity flows through the receiver line, for example, the receiver 20, a mounting spring, a substrate, various electronic components, etc. End up. In order to prevent such electrostatic discharge, the interval between the panel opening hole 11 and the receiver 20 may be increased. However, when the mobile phone 100 is made thin, increasing the interval is limited. End up.

As means for solving such a problem, an insulating rib that separates the panel opening hole and the buzzer opening hole from the back surface of the front panel is erected, or the buzzer is arranged so as to be shifted horizontally from the panel opening hole. It has been proposed to increase the distance between the panel opening hole and the buzzer opening hole (see Patent Document 1).
Japanese Patent Laid-Open No. 11-224792

  However, as in Patent Document 1, standing up the insulating rib separating the panel opening hole and the buzzer opening hole complicates the housing structure including the surface panel, and there is a problem in processing, and the buzzer opening of the buzzer Depending on the position of the hole, application becomes difficult. In addition, when the buzzer is arranged to be shifted from the panel opening hole in the horizontal direction, there is a problem that the arrangement size becomes large.

  Therefore, the present invention provides a portable electronic device having an acoustic part that generates or receives sound, such as a receiver and a speaker, and has a simple structure with a small arrangement size including a panel opening hole serving as an acoustic part and a sound entrance / exit. Thus, an object of the present invention is to provide a portable electronic device that can effectively prevent electrostatic discharge from a panel opening hole.

The portable electronic device according to claim 1, wherein an acoustic part is disposed inside a housing, and at least one panel opening hole having an area smaller than an area of the acoustic part is provided so as to pass sound between the acoustic part and the outside. In the portable electronic device provided on the panel of the housing,
An insulating thin film having at least one insulating thin film opening hole is interposed between the panel portion including the panel opening hole of the panel and the acoustic part;
The insulating thin film opening hole is provided in the horizontal direction with respect to the panel opening hole and the panel portion.

  According to a second aspect of the present invention, there is provided the portable electronic device according to the first aspect, wherein an area of the insulating thin film opening hole is larger than an area of the panel opening hole.

  According to a third aspect of the present invention, in the portable electronic device according to the first aspect, the insulating thin film opening hole is provided in the vicinity of a position farthest from the panel opening hole.

  A portable electronic device according to a fourth aspect of the present invention is the portable electronic device according to any one of the first to third aspects, wherein a predetermined interval is provided between the acoustic portion and the insulating thin film and between the insulating thin film and the panel portion. A resonance space is formed by providing an interval.

  The portable electronic device according to claim 5 is the portable electronic device according to claim 4, wherein a thickness of at least a central portion of the panel portion is made thinner than a thickness of a peripheral portion of the panel portion, and the insulating thin film and the A predetermined interval between the panel portion is formed.

  A portable electronic device according to a sixth aspect is the portable electronic device according to the fourth or fifth aspect, wherein the predetermined interval is provided by interposing a cushion member between the acoustic part and the insulating thin film.

  The portable electronic device according to claim 7 is the portable electronic device according to any one of claims 1 to 6, wherein the insulating thin film is a synthetic resin film.

  The portable electronic device according to claim 8 is the portable electronic device according to any one of claims 1 to 6, wherein the insulating thin film is formed of a material same as that of the panel.

  According to the portable electronic device of the present invention, in the portable electronic device including an acoustic part that generates or receives sound, such as a receiver, a speaker, a buzzer, and a microphone, at least between the panel part including the opening hole part and the acoustic part. An insulating thin film having one insulating thin film opening hole is interposed, and the insulating thin film opening hole is provided in the horizontal direction with respect to the panel opening hole and the panel portion. Thereby, the arrangement | positioning dimension containing the panel opening hole used as an acoustic part and an entrance / exit of a sound can be made small, and the electrostatic discharge from a panel opening hole can be prevented effectively with a simple structure.

  Further, since the area of the insulating thin film opening hole is larger than the area of the panel opening hole, attenuation of transmitted sound can be reduced.

  In addition, since the resonance space is formed by providing a predetermined interval between the acoustic part and the insulating thin film and between the insulating thin film and the panel portion, the clarity of the transmitted sound can be maintained. In addition, since the thickness of the panel portion is made thinner than the surrounding thickness of the panel portion, the predetermined distance between the insulating thin film and the panel portion is formed, so that the distance from the panel surface when the acoustic portion is set The increase in depth can be reduced.

  Further, it is not necessary to consider the position of the buzzer opening hole of the buzzer as in the conventional case, and it is only necessary to determine the position of the film opening hole in relation to the panel opening hole. Can be applied.

  Embodiments of the present invention will be described below with reference to the drawings. Hereinafter, a cellular phone will be described as an example of the portable electronic device. However, the present invention is not limited to the cellular phone, and can be widely applied to portable electronic devices having an acoustic unit such as PHS and PDA. Further, although the receiver is described as an example of the acoustic unit, the present invention is not limited to the receiver, and can be applied to a device that generates or receives sound such as a speaker, a buzzer, and a microphone.

  The case where the portable electronic device of the present invention is applied to FIG. 1 showing a part of the external structure of a general folding mobile phone 100 will be described as an example.

  FIG. 2 is a diagram showing an AA cross section of the mobile phone of FIG. 1 according to the present invention. FIG. 3 is a diagram showing a BB cross section of FIG. 2. In these drawings, the same components as those described in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted.

  2 and 3, a panel opening hole 11 is provided in the panel 10 of the casing of the mobile phone 100. The receiver 20 which is an acoustic part is arranged inside the panel 10 a of the housing so that a part thereof faces the panel opening hole 11. As shown in the figure, in this example, the area of the panel opening hole 11 is smaller than the area of the receiver 20.

  A synthetic resin film (that is, an insulating film) 40 as an insulating thin film is interposed between the panel portion 10 a including the panel opening hole 11 and the receiver 20. The panel portion 10 a is a portion surrounded by the wall 14 provided on the inner surface side of the panel 10, that is, a portion facing the receiver 20. The synthetic resin film 40 is provided with a film opening hole (insulating thin film opening hole) 41 as shown in FIG. As this synthetic resin film 40, polyethylene terephthalate (PET) is suitable, and the thickness thereof is, for example, 0.2 mm.

  Sound is transmitted between the receiver 20 and the outside of the casing of the mobile phone 100 through the film opening hole 41 and the panel opening hole 11 in order.

  The film opening hole 41 is provided to be separated in the horizontal direction with respect to the panel opening hole 11 and the panel portion 10a, thereby increasing the insulation distance between the receiver 20 and the film opening hole 11. Thereby, the tolerance to electrostatic discharge from the film opening hole 11 to the receiver 20 is increased, and the occurrence of malfunction or failure due to static electricity can be reduced.

  In order to make the insulation distance between the receiver 20 and the panel opening hole 11 the longest, the film opening hole 41 is preferably provided at a position farthest from the panel opening hole 11 or in the vicinity thereof. The area of the film opening hole 41 is desirably larger than the area of the panel opening hole 11.

  Thus, the synthetic resin film 40 provided with the film opening hole 41 is interposed between the panel portion 10a including the panel opening hole 11 and the receiver 20, and the film opening hole 41 and the panel opening hole 11 are connected to the panel. By disposing the portion 10a in the horizontal direction, the arrangement size including the receiver opening 20 and the panel opening hole 11 serving as the sound entrance / exit is reduced, and the electrostatic discharge from the panel opening hole 11 is effective with a simple structure. Can be prevented.

  Moreover, since the area of the film opening hole 41 is made larger than the area of the panel opening hole 11, attenuation of the transmitted sound can be reduced.

  In the example of FIG. 3, the film opening hole 41 has a shape obtained by cutting a part of a circle with a string. This shape can increase the area of the film opening hole 41 and increase the horizontal distance of the panel opening hole 11. Therefore, it is effective in preventing electrostatic discharge and transmitting sound.

  The shape of the film opening hole 41 is not limited to the example of FIG. 3, and may be any shape such as a rectangle, a triangle, a circle, and an ellipse.

  As the synthetic resin film 40 having the film opening hole 41 is disposed between the receiver 20 and the panel opening hole 11, a first predetermined interval d1 is provided between the synthetic resin film 40 and the panel portion 10a. One resonance space 42 is formed. In addition, a second predetermined interval d <b> 2 is provided between the receiver 20 and the synthetic resin film 40 to form a second resonance space 43. By forming these resonance spaces 42 and 43, the clarity and volume of the transmitted sound are ensured.

  The first predetermined distance d1 between the synthetic resin film 40 and the panel portion 10a is the thickness of the panel portion 10a including at least the central portion of the panel portion 10a, that is, the portion facing the film opening hole 41 and the panel opening hole 11. The thickness is smaller than the thickness of the peripheral portion of the panel portion 10a. The thickness of the panel 10 is, for example, 1 mm, and the first predetermined interval d1 is, for example, about 0.2 mm. Therefore, the thickness of the central portion of the panel portion 10a is about 0.8 mm.

  The second predetermined distance d2 between the receiver 20 and the synthetic resin film 40 is formed by the cushion member 30 provided on the synthetic resin film 40 so as to correspond to the peripheral portion of the panel portion 10a. The cushion member 30 is preferably an elastic member such as rubber, and its thickness is set to a dimension of about 0.5 to 1 mm, for example.

  The wall 14 is formed in a circular shape in accordance with the outer shape of the receiver 20 so that the receiver 20 can be inserted. A notch for positioning is provided in a part of the wall 14.

  The synthetic resin film 40 is provided in a circular portion matching the outer shape of the receiver 20, a film opening hole 41 formed in the circular portion, and a part of the outer edge of the circular portion, and is fitted into a notch portion of the wall 14. And a projecting portion.

  The cushion member 30 has a donut shape portion whose center portion corresponding to the center portion of the panel portion 10a is lacking in a circular shape, and a protruding shape that is provided at a part of the outer edge of the donut shape portion and is fitted into the notch portion of the wall 14. Part.

  Then, the synthetic resin film 40 and the cushion member 30 are sequentially stacked on the inner side of the wall 14 erected on the inner surface of the panel 10 so that the respective projecting portions are fitted into the cutout portions of the wall 14. To the receiver 20. Each member is fixed by, for example, an adhesive. Thereby, it assembles | assembles in a state as shown in FIG. 2, FIG.

  In the above embodiment, the synthetic resin film 40 is used as the insulating thin film. For example, it can be formed of the same material as that of the panel 10. This insulating thin film may be formed separately from the panel 10 or may be molded integrally with the panel 10. In this case, when forming the casing of the portable electronic device 100, the insulating thin film can be formed together, and the same material is used, so that the manufacture becomes easy.

  Further, only one panel opening hole 11 is shown in an oval shape, but it can be formed in an arbitrary shape other than an oval shape according to a design viewpoint, etc., and is not limited to one, but two pieces. It is good also as providing the above panel opening hole.

  Furthermore, in the said Example, according to the receiver 20 being circular, the wall 14, the synthetic resin film 40, the cushion member 30, etc. are also circular. However, if the receiver 20 has a shape other than a circle, for example, a rectangular shape, the wall 14, the synthetic resin film 40, the cushion member 30, and the like are also configured, for example, in a rectangular shape according to the shape of the receiver. Also in this case, the relationship between the position and size (size) of the panel opening hole 11 and the film opening hole 41, the first predetermined distance d1 between the synthetic resin film 40 and the panel portion 10a, the receiver 20 and the synthetic resin. The second predetermined distance d2 between the film 40 and the like may be the same as described in the above embodiment.

The figure which shows a part of the external structure in the state which opened the folding type mobile phone The figure which shows the AA cross section which passes along the panel opening hole in this invention of FIG. 1, and a receiver. The figure which shows the BB cross section of FIG. 2 of this invention The figure which shows the AA cross section which passes along the conventional panel opening hole of FIG. 1, and a receiver.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Mobile phone 10 Panel 11 Panel opening hole 10a Panel part 12, 13 Blind hole 14 Wall 20 Receiver 30 Cushion member 40 Synthetic resin film 41 Film opening hole 42 1st resonance space 43 2nd resonance space

Claims (8)

An acoustic part is arranged inside the casing, and at least one panel opening hole having an area smaller than the area of the acoustic part is provided in the panel of the casing so as to pass sound between the acoustic part and the outside. In portable electronic devices
An insulating thin film having at least one insulating thin film opening hole is interposed between the panel portion including the panel opening hole of the panel and the acoustic part;
The portable electronic device according to claim 1, wherein the insulating thin film opening hole is provided in a horizontal direction with respect to the panel opening hole and the panel portion.   The portable electronic device according to claim 1, wherein an area of the insulating thin film opening hole is larger than an area of the panel opening hole.   2. The portable electronic device according to claim 1, wherein the insulating thin film opening hole is provided in the vicinity of a position furthest from the panel opening hole.   The resonance space is formed by providing a predetermined interval between the acoustic part and the insulating thin film and between the insulating thin film and the panel portion, respectively. The portable electronic device described.   The thickness of at least the central portion of the panel portion is made thinner than the thickness of the peripheral portion of the panel portion to form a predetermined interval between the insulating thin film and the panel portion. Item 5. The portable electronic device according to Item 4.   6. The portable electronic device according to claim 4, wherein the predetermined interval is provided by interposing a cushion member between the acoustic part and the insulating thin film.   The portable electronic device according to claim 1, wherein the insulating thin film is a synthetic resin film. The portable electronic device according to claim 1, wherein the insulating thin film is made of the same material as the panel.