JP4267372B2 - Electronics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic apparatus such as a mobile phone and a PDA (Personal Digital Assistant) provided with a display device that is provided inside a housing and exposed to the outside.
[0002]
[Prior art]
In general, an electronic apparatus including a means for displaying information includes a display device such as a liquid crystal display device that exposes a display surface outwardly from an opening formed in a housing (see, for example, Patent Document 1). ). Since these display devices are liable to malfunction or fail due to static electricity, conventionally, a thin sheet metal member made of a conductive material is disposed close to the display device, and the sheet metal member is disposed inside the housing. Connected to the ground pattern on the circuit board. This prevents external static electricity from escaping to the ground pattern of the circuit board and preventing the display device from being charged with static electricity. For example, as shown in FIG. 5, the sheet metal member is sandwiched and fixed between the display device 51 and the inner surface 53 a of the housing 53.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-18264
[Problems to be solved by the invention]
By the way, in the electronic device described above, foreign matter such as dust or dust enters the inside of the housing 53 through a fitting portion between the front case and the case or the case constituting the housing 53 and a gap formed in the housing 53. Sometimes.
In addition, since a minute gap is generated between the display device 51 and the sheet metal member 55 and between the sheet metal member 55 and the housing 53, the foreign matter that has entered the housing 53 is displayed through the minute gap. 51 and the translucent board provided in the opening part of the housing | casing 53, and there existed a subject that a display surface became difficult to visually recognize.
Therefore, conventionally, in order to fill these minute gaps, a sponge-like cushioning material that can be elastically deformed between the display device 51 and the sheet metal member 55 and between the sheet metal member 55 and the inner surface 53 a of the housing 53. Is inserted to prevent entry of dust and liquid.
However, in the case where the cushioning material is interposed only in one of the gaps, the entry of foreign matter cannot be sufficiently prevented. Conversely, if the cushioning material is interposed in each minute gap, the housing 53 In order to make a space between the inner surface 53a of the display device 51 and the display device 51 and to make a space for arranging the two cushioning materials, the thickness of the housing 53 must be increased, and an electronic device that is required to be downsized is required. In addition to inconvenience for the equipment, there is a problem that the amount of use of the cushioning material increases and the manufacturing cost increases.
[0005]
An object of the present invention is to provide an electronic device capable of taking measures against static electricity and dust prevention of a display device with high reliability.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention proposes the following means.
An electronic apparatus according to the present invention includes a housing in which an opening is formed, a slit is formed, a sheet metal member disposed in contact with an inner surface of the housing, and an elastic disposed in contact with the sheet metal member. A deformable cushioning material, a display device that is in contact with the cushioning material and exposed from the opening, and a locking portion that locks the display device inside the housing, The cushioning material is elastically deformed with the locking of the display device by the locking portion, and abuts against the inner surface of the housing through the slit.
The electronic device according to the present invention includes a housing in which an opening is formed, an elastically deformable cushioning material disposed in contact with the inner surface of the housing, a slit, and a contact with the cushioning material. A sheet metal member disposed in contact with the sheet metal member; a display device disposed in contact with the sheet metal member and exposed from the opening; and a locking portion configured to lock the display device inside the housing. The buffer material is elastically deformed with the locking of the display device by the locking portion and abuts on the display device through the slit.
A circuit board disposed in contact with the display device, and the locking portion locks the display device by locking the circuit board inside the housing. Features.
Moreover, the said latching | locking part is formed in the said housing, It is characterized by the above-mentioned.
[0007]
According to the electronic device of the present invention, the sheet metal member is sandwiched between the housing inner surface and the display device, and the buffer material is sandwiched between the sheet metal member and either the housing inner surface or the display device. In this case, the cushioning material is elastically deformed and enters the other gap through the slit formed in the sheet metal member, and comes into contact with the inner surface of the housing or the sheet metal member.
Therefore, even if a minute gap exists between the inner surface of the housing or the display device and the sheet metal member, both the gaps can be filled with the cushioning material, and the space between the inner surface of the housing and the display device should be increased. In addition, it is possible to effectively prevent foreign matter such as dust or dust that has entered the housing from entering between the display device and the light transmitting plate.
Further, by connecting the sheet metal member to the ground pattern of the circuit board disposed in the housing, static electricity charged in the display device and its surroundings can be released.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show an embodiment according to the present invention. The embodiment described here is a case where the present invention is applied to a mobile phone. As shown in FIG. 1, a cellular phone (electronic device) 1 according to this embodiment is formed by connecting a first housing 2 and a second housing 3 so that they can be folded together by a hinge portion 4. It is.
Various operation keys 5 such as a call key and an end key and a microphone unit 6 are provided inside the first housing 2, and these are the first ones that face the second housing 3 when folded. 1 is exposed on the facing surface 7 side of the casing 2. A display device 8 such as a liquid crystal display device and a speaker unit 9 are provided inside the second housing 3. When the display surface 8 a and the speaker unit 9 of the display device 8 are folded, the first housing is provided. It is exposed on the facing surface 11 side of the second housing 3 facing the body 2.
[0009]
The display device 8 is for displaying various types of information such as the communication state between the base station and the mobile phone 1 and mail text, and is formed in a substantially rectangular shape in plan view. Further, the microphone unit 6 and the speaker unit 9 perform a wireless call, music playback, and audio through an antenna (not shown) with the first and second housings 2 and 3 opened to each other. Used for recording.
As shown in FIG. 2, in addition to the display device 8, a sheet metal member 13, a buffer material 15, and a circuit board 17 are provided inside the second housing 3. The sheet metal member 13, the buffer material 15, the display device 8, and the circuit board 17 are sequentially stacked on the inner surface 21a of the front case 21 constituting the facing surface 11 of the second casing. Note that the inner surface 21 a of the front case 21 indicates a surface located on the opposite side of the facing surface 11.
[0010]
The front case 21 is formed with an opening 21b having a substantially rectangular shape in plan view that penetrates from the inner surface 21a side to the opposing surface 11 side. The opening 21b extends outwardly from the display surface 8a of the display device 8. It is for exposing to. The front case 21 is fixed with a translucent plate 10 covering the opening 21b so as to protect the display surface 8a of the display device 8.
A plurality of projecting wall portions 23 projecting in the thickness direction are formed on the inner surface 21 a side of the front case 21. These protruding wall portions 23 are provided so that the sheet metal member 13 and the display device 8 do not move in a direction perpendicular to the thickness direction of the front case 21 in a state where the sheet metal member 13 is disposed on the inner surface 21 a of the front case 21. Yes. That is, the protruding wall portions 23 together with the inner surface 21 a of the front case 21 constitute an accommodating portion that accommodates the sheet metal member 13 and the display device 8.
[0011]
The sheet metal member 13 prevents static electricity from escaping to the ground pattern (not shown) of the circuit board 17 and charging the display device 8, and presses the thin plate-like conductive material to display the display device 8. 8 is formed so that it can be accommodated. That is, the sheet metal member 13 includes a bottom wall portion 27 having a substantially rectangular shape in plan view, and a plurality of side wall portions 29 formed upright around the bottom wall portion 27. The display device 8 can be positioned with respect to the member 13.
The bottom wall 27 of the sheet metal member 13 is formed with a through hole 27a having a substantially rectangular shape in plan view that is substantially the same shape as the opening 21b of the front case 21, and this through hole 27a is formed on the display surface of the display device 8. This is for exposing 8a to the outside. As shown in FIG. 3, the bottom wall 27 is formed with a plurality of slits 31 in the circumferential direction so as to surround the through hole 27a.
In addition, connection terminals 35 and 37 are integrally formed on the pair of side wall portions 29 and 29 arranged to face each other, and these connection terminals 35 and 37 are connected to the ground pattern of the circuit board 17. To do.
[0012]
As shown in FIG. 2, the cushioning material 15 is formed by forming a sponge-like material made of urethane or the like with a small elastic coefficient into a thin plate having a substantially rectangular shape in plan view. The cushioning material 15 is formed with a through hole 15a having a substantially rectangular shape in plan view. The through hole 15a has substantially the same shape as the opening 21b and the through hole 27a formed in the front case 21 and the sheet metal member 13, and exposes the display surface 8a of the display device 8 to the outside.
The circuit board 17 has a plurality of various electronic components mounted thereon, and is electrically connected to the display device 8, the operation key 5, the microphone unit 6, and the speaker unit 9.
[0013]
As shown in FIG. 4, when the sheet metal member 13, the buffer material 15, the display device 8, and the circuit board 17 are sequentially stacked on the inner surface 21 a of the front case 21, the sheet metal member 13 becomes the inner surface 21 a of the front case 21. And it contacts the protrusion wall part 23 and is positioned with respect to the front case 21. Further, the buffer material 15 abuts against the bottom wall portion 27 of the sheet metal member 13 and is positioned with respect to the sheet metal member 13. Further, in the display device 8, the peripheral portion of the display surface 8 a abuts against the cushioning material 15, and the side surface 8 c adjacent to the display surface 8 a abuts against the side wall portion 29 of the sheet metal member 13 to the sheet metal member 13. Will be positioned.
The circuit board 17 is in contact with the back surface 8 b located on the opposite side of the display surface 8 a of the display device 8 and is urged toward the inner surface 21 a of the front case 21. That is, a plurality of locking portions 41 that are engaged with the circuit board 17 are formed at the distal end portion of the protruding wall portion 23 of the front case 21. In a state where the locking portion 41 is engaged with the circuit board 17, the circuit board 17 is pressed against the inner surface 21 a of the front case 21.
[0014]
The urging force by the locking portion 41 elastically deforms the cushioning material 15 sandwiched between the display device 8 and the sheet metal member 13 and inserts it into the slit 31 of the sheet metal member 13. In this state, the cushioning material 15 comes into contact with the inner surface 21 a of the front case 21 through the slit 31. Therefore, even if there are minute gaps between the sheet metal member 13 and the display surface 8 a of the display device 8 and the inner surface 21 a of the front case 21, both the gaps are filled with the buffer material 15.
In order to make the cushioning material 15 come into contact with the inner surface 21a of the front case 21 through the slit 31, it is preferable to form the sheet metal member 13 thin, and the thickness dimension thereof is 0.04 mm to 0 mm. .1 mm is particularly preferable.
That is, when the thickness of the sheet metal member 13 is greater than 0.1 mm, the depth of the slit 31 increases, and in order to cause the buffer material 15 to elastically deform and protrude from the slit 31, the thickness of the buffer material 15 is increased. This is because the display device 8 must be pressed against the inner surface 21a of the front case 21 with a large biasing force. Conversely, if the thickness of the sheet metal member 13 is smaller than 0.04 mm, the display device 8 is broken by the biasing force. It is because it becomes easy to do.
[0015]
As described above, according to the mobile phone 1, the sheet metal member 13 can prevent the display device 8 from being charged. Moreover, since the slit 31 is formed in the sheet metal member 13, the gaps between the sheet metal member 13 and the inner surface 21 a of the display device 8 and the front case 21 can be filled with one cushioning material 15. It is possible to prevent foreign matter such as dust or dust that has entered the inside of the housing 3 from entering between the light transmitting plate 10 and the display device 8.
Therefore, the user can always see the clear display surface 8a and can take countermeasures against static electricity, so that the highly reliable mobile phone 1 can be provided, and an increase in manufacturing cost of the mobile phone 1 can be suppressed. be able to.
[0016]
In the above embodiment, the cushioning material 15 is sandwiched between the display device 8 and the sheet metal member 13. However, the present invention is not limited to this. For example, between the sheet metal member 13 and the front case 21. It does not matter if it is sandwiched. In the case of this configuration, when the display device 8, the sheet metal member 13, and the buffer material 15 are pressed against the inner surface 21 a of the front case 21, the buffer material 15 is displayed on the display surface of the display device 8 through the slit 31 of the sheet metal member 13. Since the peripheral edge 8a also abuts, each gap between the sheet metal member 13, the display device 8, and the inner surface 21a of the front case 21 can be filled in the same manner as in the present embodiment.
Further, although the cushioning material 15 is formed from a sponge-like material, the present invention is not limited to this, and it is sufficient that the cushioning material 15 is formed from an elastic body that can be easily elastically deformed. That is, for example, the buffer material 15 may be formed of rubber.
[0017]
Furthermore, the cellular phone 1 is not limited to two cases in which the two casings are foldably connected to each other, but the two casings are connected to each other by connecting means such as PDA (Personal Digital Assistants) and a notebook computer. Any electronic device may be used.
In addition, the electronic device is not limited to having two housings, and may be configured from one housing having the structure of the present embodiment, for example.
[0018]
As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
[0019]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent foreign matter such as dust or dust that has entered the housing from entering between the translucent plate and the display device, so that a clear display surface can always be visually recognized. In addition, since only one cushioning material can be used to prevent the intrusion of foreign matter, an increase in the manufacturing cost of the electronic device can be suppressed.
Further, the display device can be prevented from being charged by connecting the sheet metal member to the ground pattern of the circuit board.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state in which a first housing and a second housing are opened to each other in an electronic apparatus according to an embodiment of the present invention.
2 is an exploded perspective view illustrating a circuit board, a display unit, a buffer material, and a sheet metal member disposed in a second housing in the electronic apparatus of FIG. 1;
3 is a sheet metal member attached to a display unit in the electronic apparatus of FIG. 1, (a) shows a plan view, and (b) is a cross-sectional view taken along line AA in (a). is there.
4 is an enlarged cross-sectional view illustrating a state in which the circuit board, the display unit, the cushioning material, and the sheet metal member are pressed against the inner surface of the front case in the electronic device of FIG.
FIG. 5 is an enlarged cross-sectional view showing a main part of an example of a conventional electronic device.
[Explanation of symbols]
1 Mobile phone (electronic equipment)
3 Second housing 8 Display device 8a Display surface 10 Translucent plate 21a Inner surface 21b Opening portion 13 Sheet metal member 15 Buffer material 17 Circuit board 31 Slit

Claims (4)

A housing in which an opening is formed;
A slit is formed, and a sheet metal member disposed in contact with the inner surface of the housing;
An elastically deformable cushioning material disposed in contact with the sheet metal member;
A display device disposed in contact with the cushioning material and exposed from the opening;
A locking portion for locking the display device inside the housing,
The electronic device is characterized in that the buffer material is elastically deformed in accordance with the locking of the display device by the locking portion and abuts against the inner surface of the housing through the slit . A housing in which an opening is formed;
  An elastically deformable cushioning material disposed in contact with the inner surface of the housing;
  A slit is formed, and a sheet metal member disposed in contact with the cushioning material;
  A display device disposed in contact with the sheet metal member and exposed from the opening;
  A locking portion for locking the display device inside the housing,
  The electronic device is characterized in that the buffer material is elastically deformed with the locking of the display device by the locking portion and abuts on the display device through the slit. A circuit board disposed in contact with the display device,
  The electronic device according to claim 1, wherein the locking portion locks the display device by locking the circuit board within the housing. The electronic device according to any one of claims 1 to 3, wherein the locking portion is formed on the housing.

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