JP4540599B2 - Mobile device - Google Patents

Description

  The present invention relates to a portable terminal for wireless communication, and more particularly to the structure of a protective member for protecting a display unit of a portable terminal.

  In recent years, with the widespread use of mobile terminals for communication (for example, mobile phones and PHS), mobile terminals have been improved in function and size. An LCD (Liquid Crystal Display) is widely used as a display unit for displaying various types of information in portable terminals. An LCD is a device that displays an image by enclosing a special liquid between two glass plates and applying a voltage to increase or decrease the light transmittance. Since the liquid crystal itself does not emit light, display is performed using the light of a fluorescent lamp (backlight) provided behind in a dark place. Since it is thinner and lighter than ordinary displays, it is widely used mainly in small electronic devices such as mobile phones, notebook computers, and flat-screen TVs.

In a portable terminal using the above LCD as a display unit, a transparent member (protective panel) mainly composed of plastic or the like is often used as a member for protecting the LCD. An exterior member of a mobile terminal represented by the above-described protection member has various protection functions in order to prevent various obstacles (for example, impact, water immersion, etc.) that the device inside the mobile terminal receives from the outside. Yes.
In relation to the above problem, Patent Document 1 discloses a casing structure capable of preventing water vapor from entering from a multidirectional operation key. The casing structure disclosed in Patent Document 1 is a casing structure of an electronic apparatus in which a multidirectional operation key is provided adjacent to an LCD, and is provided with a key hole formed in the casing and the key hole. A moisture-absorbing / releasing substrate is provided in the gap with the multidirectional operation key to prevent water vapor from entering the LCD. Further, a moisture-absorbing / releasing substrate is affixed to at least one of the peripheral edge of the key hole formed in the casing and the multidirectional operation key provided in the key hole.
According to the above-mentioned patent document 1, since the moisture absorbing / releasing material absorbs water vapor from the gap between the key hole and the multidirectional operation key, it is possible to prevent water vapor from entering the LCD. Is possible.
JP 2002-280756 A

  However, in the portable terminal disclosed in Patent Document 1, it is necessary to newly provide a moisture-absorbing / releasing base material inside the portable terminal. Moreover, there existed a problem that the design of the internal structure of a portable terminal might be restrict | limited by presence of a moisture absorption / release base material. In relation to the above problem, there is a portable terminal in which a protective member for protecting the LCD is duplicated (provided with a plurality of protective members). In the portable terminal described above, it is possible to improve the protection performance by duplicating the protective member and improve the degree of freedom when designing the design (appearance) of the portable terminal.

  However, when a protective member having a double structure is used, there is a problem that moisture cannot be absorbed from the sealed space when foreign matter (for example, water vapor) enters the space between the protective members (sealed space). As a result, for example, when there is a difference in the temperature between the outside air and the inside of the mobile terminal, there is a problem that the protective member is condensed and the LCD becomes difficult to visually recognize.

  The present invention has been made in order to solve the above-described problems, and its purpose is to allow a foreign substance such as water vapor to enter a gap between a plurality of protective members in a portable terminal provided with a plurality of protective members in a display unit. In such a case, another object is to provide a portable terminal including a display unit capable of performing normal display.

In order to achieve the above object, a portable terminal of the present invention includes a liquid crystal display that displays an image, a second protective member that is positioned above the liquid crystal display and protects the liquid crystal display, and an upper portion of the second protective member. A first protective member positioned above the adhesive member, exposing a part of the liquid crystal display to the outside to protect the liquid crystal display, and an exterior integrally formed with the first protective member When, wherein the second protection member has a recess in the central portion, by said first protective member and the second protective member are in close contact, that Do a space generated by the recess enclosed space in mobile terminal one said second protective member, the adhesive surface that adheres to the exterior of the inner surface via the adhesive member, to allow ventilation between the outside of the second protective member and the enclosed space or The example Bei a plurality of grooves, of the adhesive member, and wherein the gap is the portion located above the groove is formed.
According to this configuration, the mobile phone (mobile terminal) of the present invention includes a liquid crystal display, a window (first protective member) that is an exterior member that protects the liquid crystal display, and a protective panel that is an internal member that protects the liquid crystal display ( Second protective member). The protective panel is bonded to the inside of the exterior via an adhesive sheet (adhesive member), and is physically in close contact with the exterior and the window. Moreover, since the center part of the protection panel is recessed, a sealed space can be formed between the protective panel and the window. In the above configuration, a part of the upper surface (outside the portable terminal) of the protection panel is cut away, so that a groove is provided in the protection panel. Thereby, in a state where the window and the protective panel are in close contact with each other, the groove portion serves as a ventilation hole that allows ventilation between the sealed space and the outside of the protective panel.

According to the configuration of the present invention, even if foreign matter such as water vapor enters the gaps between the plurality of protective members that protect the LCD, air convection by the vents exists, so foreign matter can be discharged to the outside. Is possible. In addition, the presence of a gap between the groove portion provided in the second protective member and the adhesive member above the groove portion can avoid a situation in which a space for ventilation is expanded and water vapor is accumulated in the sealed space.

Hereinafter, a portable terminal of the present invention will be described with reference to the drawings.
[Embodiment]
<1. Overall configuration of mobile terminal>
Here, the overall configuration of the mobile phone (mobile terminal) 1 of the present invention will be described with reference to the perspective view of FIG.

  As shown in the perspective view of FIG. 5, the mobile phone 1 of the present invention includes an upper housing 10 and a lower housing 20. The upper casing 10 and the lower casing 20 are connected to each other by a hinge 30 so as to be opened and closed, and can be folded. The upper housing can be further divided into a main cabinet 110 and a sub cabinet 120.

A main window (not shown) is incorporated in the main cabinet 110. The main window is a protective member for protecting a main display unit (not shown) for displaying various information of the mobile phone 1 using the LCD. Further, the sub cabinet 120 incorporates a sub window 121, an imaging unit 122, and the like.
The sub window 121 is a protection member for protecting a sub display unit for simply displaying various information held by the mobile phone 1. The sub display unit uses a small and low-function LCD compared to the main display unit, and the amount of information that can be displayed is smaller than that of the main display unit. However, on the contrary, it has the feature that it consumes less power. Therefore, the size of the sub window 121 is smaller than the main window. The imaging unit 122 is an optical imaging device that performs imaging of a solid using a CCD (Charge Coupled Devices) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor.

The lower housing 20 incorporates an antenna (not shown), a battery storage unit 210, a battery (not shown), a call port (not shown), and the like. The antenna is a transmitter for transmitting and receiving various radio waves when the mobile phone 1 performs communication. The battery storage unit is a member for storing a battery that is a power source of the mobile phone 1. The call port is an input device for inputting voice when a user makes a call.
<2. Conventional Sub-cabinet Configuration>
Here, the configuration of the sub-cabinet 120 in the conventional mobile phone 1 will be described with reference to the perspective views of FIGS.
FIG. 6 is a perspective view when the sub cabinet 120 is detached from the mobile phone 1 and viewed from the inside of the apparatus. FIG. 7 is a cross-sectional view when the sub cabinet 120 is removed from the mobile phone 1 and the sub cabinet 120 is cut laterally near the center. As shown in FIG. 6, the lower cabinet 120 includes a protective panel (second protective member) 123 on the back surface thereof. The protective panel 123 is a protective member made of a transparent member such as plastic, for example. The protective panel 123 is a member that protects the LCD from the outside as in the above-described sub window 121 and has transparency for allowing the user to visually recognize the LCD. It is.
A method for attaching the protective panel 123 to the mobile phone 1 will be described with reference to FIG. As shown in FIG. 7, the protective panel 123 is bonded and fixed to the back surface of the sub cabinet 120 by an adhesive sheet (adhesive member) 124. The adhesive sheet 124 is an adhesive sheet having the same shape as the outer surface of the protective panel 123, for example, and adheres the sub cabinet 120 and the protective panel 123. Note that the protective panel 123 has a curved structure with respect to the inner side of the mobile phone 1 in order to prevent the protection and transparency from being lowered by contacting the window 121 (see FIG. 7). As a result, a sealed space 125 exists between the window 121 and the protective panel 123.
The configuration of the conventional sub cabinet 120 has been described above. According to the above configuration, the sealed space 125 between the sub window 121 and the protection panel 123 is generated. For this reason, in the unlikely event that foreign matter such as water vapor enters the sealed space 125 for some reason, the water vapor cannot be removed from the sealed space 125. As a result, for example, when the temperature difference between the sealed space 125 and the outside of the mobile phone 1 becomes large, the sub window 121 or the protective panel 123 is condensed, which causes a problem for the user to visually recognize the LCD. there were.
<3. Regarding the configuration of the sub-cabinet of the present invention>
Here, the configuration of the sub-cabinet 120 in the mobile phone 1 of the present invention will be described with reference to the perspective views of FIGS.
FIG. 1 is a perspective view when each member constituting the sub-cabinet 120 is removed from the mobile phone 1 and each member is viewed from the outside of the apparatus. As shown in FIG. 1, the sub cabinet 120 is configured to include at least a sub window 121, a protection panel 123, and an adhesive sheet 124. FIG. 2 is a perspective view when the members constituting the sub cabinet 120 are removed from the mobile phone 1 and the members are viewed from the inside of the apparatus. The contents of each member are the same as in FIG.
As shown in FIGS. 1 and 2, the protective panel 123 of the present invention is adhered to the inside of the sub cabinet 120 by adhesive sheets 124 divided into a plurality (four in the example of FIGS. 1 and 2). Is done.
The details of the protection panel 123 of the present invention will be described with reference to FIGS. FIG. 3 is a perspective view showing details of the upper surface of the protective panel 123 (outside of the mobile phone 1). FIG. 4 is an enlarged perspective view of a part of FIG. 3 and shows a groove 123 a provided in the protective panel 123. As shown in FIG. 3, the protective panel 123 is provided with a groove 123a in a part of its upper surface (in the example of FIG. 3, the central part of each side of the protective panel 123 having a square shape). . The groove portion 123 a is provided from the concave portion 123 b that is a recess provided in the center of the protective panel 123 to the outer edge of the protective panel 123.
According to the protective panel 123 having the above structure, even when the protective panel 123 is bonded to the sub cabinet 120 by the adhesive sheet 124 as shown in FIG. 7, the protective panel 123 is interposed between the protective panel 123 and the sub cabinet 120 and the sub window 121. Thus, the groove 123a forms a vent (a space for ventilating the recess 123b and the outside of the protective panel 123), and air convection occurs.
Next, the detail of the adhesive sheet 124 of this invention is demonstrated using FIG.1 and FIG.2. As shown in FIG. 3, the adhesive sheet 124 is an adhesive member divided into a plurality of members, and is used for bonding the sub-cabinet 120 and the protection panel 123. An adhesive (for example, an adhesive made of an acrylic resin, a phenol resin, or the like) is applied to both sides of the adhesive sheet 124. Further, the adhesive sheets 124 are not in contact with each other, and the sub cabinet 120 and the protection panel 123 are bonded to each other with the gap 124a being held.
According to the pressure-sensitive adhesive sheet 124 having the structure described above, even if the protective panel 123 is bonded to the sub-cabinet 120 by the pressure-sensitive adhesive sheet 124 as shown in FIG. Vents are formed by the gaps 124a between the sheets 124, and air convection occurs. Moreover, since the adhesive sheet 124 is divided into a plurality of members, the adhesive sheet 124 does not come into contact with the groove 123a.
<4. Various features of the present invention>
According to the present embodiment, the protective panel 123 is provided with the groove 123a on a part of its upper surface, so that when the protective panel 123 is bonded to the sub cabinet 120 by the adhesive sheet 124, the protective panel 123 and the sub cabinet Between the 120 and the sub window 121, a vent is formed by the groove 123a.
Therefore, air convection can be generated in the space (vent hole) formed between the protective panel 123 and the sub cabinet 120 and the sub window 121 by the vent hole. For this reason, even if water vapor or the like enters the sealed space 125, the water vapor or the like can be removed by air convection. Thereby, for example, the sub window 121 or the protection panel 123 may be condensed due to a temperature difference between the sealed space 125 and the outside air to become cloudy, and as a result, it is possible to prevent a failure such that it becomes difficult for the user to visually recognize the LCD.
Further, according to the present embodiment, air gaps are generated by forming the gaps 124 a between the adhesive sheets 124 on the bonding surface between the sub-cabinet 120 and the protection panel 123. Moreover, since the adhesive sheet 124 is divided into a plurality of members, the adhesive sheet 124 does not come into contact with the groove 123a. Since the pressure-sensitive adhesive sheet 124 retains flexibility, there is a possibility that the concave portion is blocked by contact with the groove portion 123a. However, according to the above configuration, since the groove portion 123a is not contacted, it is possible to prevent an adverse effect such as blocking the groove portion 123a (and thus the vent hole by the groove portion 123a).
Therefore, since the vent hole can be secured reliably, even if water vapor or the like enters the sealed space 125, the external window 121 or the protective panel 123 is dewed and clouded, thereby preventing the user from seeing the LCD. can do.
[Other embodiments]
The present invention has been described with reference to the preferred embodiments and examples. However, the present invention is not necessarily limited to the above embodiments and examples, and various modifications may be made within the scope of the technical idea. Can be implemented.

  For example, even if the protective member and the adhesive member that realize the functions of the above-described embodiments are used to ensure the air permeability between the protective members in an electronic device other than a mobile phone, it goes without saying that the effect can be obtained. Yes. In this case, the plurality of protective members themselves that are bonded by the protective member and the adhesive member realize the function of the above-described embodiment, and the electronic device including the protective member and the adhesive member constitutes the present invention. become.

In addition, as an electronic device provided with said protection member and adhesive member, PHS, PDA, a notebook personal computer, a liquid crystal television, a digital camera etc. are mentioned, for example.
Further, in this embodiment, as a member processing method for imparting air permeability to the protective member, a groove is provided at the center of each side of the protective member. However, even if a groove is provided at a different location. Needless to say, the same effects as those of the present invention can be obtained.
In the present embodiment, as a member processing method for imparting air permeability to the adhesive member, the adhesive member is cut at the center of each side to provide a gap. Needless to say, the same effects as those of the present invention can be obtained even if a gap is provided by cutting the material.
In the present embodiment, the sub display unit is described as an example of the place where the protective member is installed, but even if the configuration of the protective member of the present invention is used in other display units such as the main display unit, Needless to say, similar effects can be obtained.

It is a perspective view at the time of seeing a part of member which comprises the sub cabinet of the mobile telephone of this invention from the apparatus outer side. It is a perspective view at the time of seeing a part of member which comprises the sub cabinet of the mobile telephone of this invention from the apparatus inner side. It is the perspective view which showed the protection panel of the mobile telephone of this invention. It is the perspective view which showed the groove part of the protection panel of the mobile telephone of this invention. It is the perspective view which showed the external appearance of the mobile telephone of this invention. It is a perspective view at the time of seeing a part of member which comprises the sub cabinet of the conventional mobile telephone from the apparatus inner side. It is sectional drawing which showed the cut surface at the time of cut | disconnecting a part of sub cabinet of the conventional mobile telephone to a horizontal direction.

Explanation of symbols

1 Mobile phone (mobile terminal)
10 upper housing 20 lower housing 110 main cabinet 120 sub cabinet 121 sub window (first protective member)
123 Protection panel (second protection member)
123a Groove part 123b Concave part 124 Adhesive sheet (adhesive member)
124a Clearance 125 Sealed space

Claims (1)

A liquid crystal display that displays video,
A second protective member positioned above the liquid crystal display and protecting the liquid crystal display;
An adhesive member located above the second protective member;
A first protective member positioned above the adhesive member and exposing the liquid crystal display to the outside to protect the liquid crystal display;
An exterior integrally formed with the first protective member,
The second protection member has a recess in the central portion, by said first protective member and the second protective member are in close contact, in portable terminal space generated by the concave portion enclosed space and ing,
The second protective member, the adhesive surface that adheres to the exterior of the inner surface via the adhesive member, e Bei said enclosed space with one or more grooves to allow ventilation between the outside of the second protective member ,
A portable terminal , wherein a gap is formed in a portion of the adhesive member located above the groove .

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