JP2006012730A - Static elimination member, static countermeasure unit and portable electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve manufacturing efficiency of a portable electronic apparatus and to improve reliability of countermeasures of an electric component against static electricity, in a static elimination member for countermeasures against static electricity of an electric component installed in a casing constituting the portable electronic apparatus and exposed to the outside of the casing. <P>SOLUTION: This static elimination member 33 of an electric component 13 formed of a conductive material includes a frame body part 35 covering at least a peripheral edge of a principal surface of the electric component 13 and a connection terminal part 39 formed integrally with the frame body part 35 and extending downward. In the static elimination member 33 provided in this case, the connection terminal part 39 is equipped with a lock part 41 engaging with the electric component 13 and an elastically deformable spring part 43. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a static electricity removing member for an electrical component, a static electricity countermeasure unit for an electrical component including the same, and a portable electronic device using the same.

2. Description of the Related Art Conventionally, portable electronic devices such as mobile phones, simplified mobile phones (PHS (registered trademark)), PDAs (Personal Digital Assistants), digital cameras, and the like are arranged in a casing, and the casing. And an electric component exposed to the outside, and a circuit board on which the electric component is mounted. Examples of such electrical components include a liquid crystal display device, a microphone, a speaker, and a camera unit. Around these electrical components, various devices have been devised to allow static electricity to escape to the ground electrode formed on the circuit board in order to prevent malfunction of the electrical components due to static electricity (for example, Patent Documents). 1).
As such an anti-static structure, for example, there is a structure that is formed from a thin metal foil and is attached to the surface of an electrical component via an adhesive. In addition, the electrical components and the circuit board are arranged so as to overlap each other in the thickness direction of the casing, and are sandwiched between a pair of case members constituting the casing. Such an anti-static structure and a ground electrode are brought into contact with each other by the sandwiching force of these case members, and electrical conduction therebetween is achieved.
JP 2003-18264 A

However, since the conventional anti-static structure as described above is composed of a metal stay attached to the surface of an electrical component, it takes time to install the anti-static structure and reduces the manufacturing efficiency of portable electronic devices. There is a problem of making it.
In addition, since such a structure against static electricity is brought into contact with the ground electrode of the circuit board by using a force that sandwiches the electrical component and the circuit board between the pair of case members, such a structure against static electricity is provided. There is a problem that it is difficult to ensure electrical continuity between the body and the ground electrode, particularly there is a risk of contact failure due to vibration or the like, and the reliability of countermeasures against static electricity of electrical components is lacking.
The present invention has been made in view of the above-described circumstances, and includes an electrostatic removal member capable of improving the manufacturing efficiency of a portable electronic device and improving the reliability of countermeasures against static electricity of an electrical component. It is an object of the present invention to provide a static electricity countermeasure unit for electric parts and a portable electronic device using the same.

In order to solve the above problems, the present invention proposes the following means.
The static electricity removing member according to the present invention is a static electricity removing member for an electrical component formed of a conductive material, and includes a frame body portion covering at least a peripheral edge of the main surface of the electrical component, and the frame body portion integrally. The connection terminal portion is formed and extends downward, and the connection terminal portion includes a locking portion that engages with the electric component and a spring portion that is elastically deformable. Note that the main surface of the electrical component indicates, for example, a surface including a portion exposed to the outside of the housing in a state where the electrical component is provided inside the housing.
Further, in the static electricity removing member according to the present invention, the connection terminal portion is provided in a pair with the electrical component interposed therebetween, the spring portion is provided on the distal end side of the connection terminal portion, the spring portion and the connection terminal portion The locking portion is provided between the base portion and the base portion.

Furthermore, the static electricity countermeasure unit according to the present invention includes the static electricity removing member, an electric component having an engaging portion that engages with a locking portion of the static electricity removing member on a side surface adjacent to the main surface, and a ground electrode. A circuit board, disposing the frame portion of the static electricity removing member on the peripheral edge of the main surface of the electrical component, and engaging the engaging portion of the static electricity removing member with the engaging portion of the electrical component, The connection terminal portion of the static electricity removing member is in elastic contact with the ground electrode of the circuit board.
Further, the static electricity countermeasure unit according to the present invention is configured such that the spring portion of the connection terminal portion is elastically deformed by a pressing force by the engagement portion of the electrical component, and the connection terminal portion is elastically contacted with the ground electrode of the circuit board. It is characterized by being.

Furthermore, the portable electronic device according to the present invention is characterized in that the anti-static unit is provided in a housing.
Further, in the portable electronic device according to the present invention, a protruding portion including a horizontal wall portion protruding outward and a vertical wall portion extending downward from the horizontal wall portion is provided on a side surface of the electrical component, The projecting portion is engaged and fixed to the housing, and the horizontal wall portion is provided with the engaging portion, and when the electrical component is fixed in the housing, the connection is caused by the pressing force of the engaging portion. The spring part of the terminal part is elastically deformed, and the connection terminal part is brought into elastic contact with the ground electrode of the circuit board.

  According to the present invention, since the frame portion and the electrical component can be fixed integrally by engaging the locking portion with the electrical component, the assembly workability of the portable electronic device incorporating the electrical component is improved. Can be improved. In addition, since the static electricity removing member is not attached to the electrical component by bonding as in the prior art, the static electricity removing member is attached to the electrical component using a locking portion. Can be easily attached and detached, and maintenance of electric parts can be easily performed.

  In addition, in the state where the electrical component is arranged on the surface of the circuit board, the electrical connection between the ground electrode formed on the surface of the circuit board and the static eliminator can be maintained by the biasing force of the spring portion. The generated static electricity can be surely released from the frame body portion to the ground electrode. Therefore, it is possible to improve the reliability of the countermeasure against static electricity of the electrical component.

  1 to 5 show one embodiment according to the present invention, and the embodiment described here is a case where the present invention is applied to a mobile phone. As shown in FIGS. 1 and 2, a mobile phone (mobile electronic device) 1 according to this embodiment includes a first casing 2 and a first casing 2 that can be overlapped in the thickness direction of the first casing 2. 2 housings 3 and a hinge portion 5 that connects the two housings 2 and 3 so that they can be folded together. In addition, the hinge part 5 is distribute | arranged so that each edge part 2a, 3a (henceforth base end part 2a, 3a) of the two housing | casing 2 and 3 may be connected.

Inside the first housing 2 are provided an operation unit 7 composed of various pressable operation keys such as a call key and a call end key, and a microphone unit 9 for a call. The microphone unit 9 is disposed at the distal end portion 2b of the first housing 2 located on the opposite side to the base end portion 2a. The operation unit 7 and the microphone unit 9 are exposed outward from the facing surface 2c of the first housing 2 that faces the second housing 3 in a state where the two housings 2 and 3 are overlapped with each other. ing.
Inside the second housing 3 are two display units 11 and 13 for displaying various information, such as an LCD (Liquid Crystal Display), a speaker unit 15 for calling, and operations provided in the first housing 2. A circuit board (not shown) for electrical connection with the unit 7 and the microphone unit 9 is provided. The speaker unit 15 is disposed at the distal end portion 3b of the second casing 3 that is located on the opposite side of the base end portion 3a.

The first display unit 11 and the speaker unit 15 are outward from the facing surface 3c of the second housing 3 that faces the first housing 2 in a state where the two housings 2 and 3 are overlapped with each other. Exposed. The second display portion (electrical component) 13 is exposed outward from the outer surface 3d located on the side opposite to the facing surface 3c.
The operation unit 7, the microphone unit 9, the first display unit 11, and the speaker unit 15 exposed from the facing surfaces 2 c and 3 c are each in a state in which the first and second casings 2 and 3 are overlapped and closed. Covered by the casings 2 and 3. Further, the display surface 13a of the second display unit 13 exposed from the outer surface 3d is exposed to the outside regardless of whether the two casings 2 and 3 are opened or closed. In addition, the code | symbol 16 in a figure is an antenna for performing radio | wireless communication with a base station.

  As shown in FIGS. 3 and 4, the second display unit 13 is disposed on the surface 17 a of the circuit board 17 and has a substantially rectangular plate-like display unit body (main body unit) having a display surface 13 a exposed to the outside. ) 19 and a pair of projecting portions 23 projecting from the side surface 19 c of the display unit main body 19, and these projecting units 23 are arranged symmetrically with respect to the display unit main body 19. Each protrusion 23 includes a substantially plate-like horizontal wall (engaging portion) 25 extending substantially parallel to the display surface 13a from the side surface 19c of the display unit main body 19, and the circuit board 17 side from the tip of the horizontal wall 25. And a vertical wall portion 27 extending toward the top.

The horizontal wall portion 25 is formed to be thinner than the thickness dimension of the display portion main body 19, and the upper surface 25 a is downward in the thickness direction from the top surface (main surface) 19 a of the display portion main body 19 including the display surface 13 a. Arranged in a lowered position.
Further, the back surface 25 b of the horizontal wall portion 25 located on the side opposite to the upper surface 25 a is located above the back surface 19 b of the display unit main body 19 in contact with the front surface 17 a of the circuit board 17 in the thickness direction. That is, in a state where the display unit main body 19 is disposed so as to overlap the surface 17a of the circuit board 17, the surface 17a of the circuit board 17 and the back surface 25b of the horizontal wall part 25 are opposed to each other with a gap. Will be located.
A through hole 29 penetrating in the thickness direction is formed on the front end side of the horizontal wall portion 25, and the through hole 29 is formed in a substantially rectangular shape in plan view.

The vertical wall portion 27 is formed so as to protrude downward in the thickness direction from the back surface 25 b of the display unit main body 19, and a front case 31 constituting the facing surface 3 c of the second housing 3 is formed at the tip thereof. A substantially wedge-shaped collar portion 27a for fixing the second display portion 13 to each other is formed.
In the second display unit 13 configured as described above, the static electricity removing member 33 for releasing static electricity generated in the vicinity of the second display unit 13 to the ground electrode 17 b formed on the surface 17 a of the circuit board 17. Is attached.

  As shown in FIGS. 4 and 5, the static electricity removing member 33 is made of a conductive material such as a metal or a conductive plastic, and has a plan view that covers the periphery of the display surface 13 a of the second display unit 13. A rectangular frame body part 35, a side wall part 37 covering a part of the side surface 19 c of the display part main body 19, and a connection terminal part 39 electrically connected to the ground electrode 17 b of the circuit board 17 are provided. The frame body portion 35, the side wall portion 37, and the connection terminal portion 39 are integrally formed, and when formed of a metal plate, they are formed by bending.

A pair of connection terminal portions 39 are provided at positions where the second display portion 13 is sandwiched, and a locking portion 41 for fixing the static electricity removing member 33 to the second display portion 13 and a locking portion 41. And an elastically deformable spring portion 43 provided on the distal end side.
Each locking portion 41 is configured to engage with the horizontal wall portion 25 of each protruding portion 23 in a state where the frame body portion 35 is disposed on the peripheral edge of the top surface 19 a of the display portion main body 19. That is, the locking portion 41 is formed in a substantially U shape in a sectional view, and is configured to contact the upper surface 25 a and the back surface 25 b of the horizontal wall portion 25 through the through hole 29 and sandwich the horizontal wall portion 25. Yes. The locking portion 41 configured as described above is provided between a spring portion 43 described later and the root portion of the connection terminal portion 39.

The spring portion 43 is formed integrally with a portion of the locking portion 41 that contacts the back surface 25 b of the horizontal wall portion 25, and is inclined with respect to the back surface 25 b of the horizontal wall portion 25. The spring portion 43 is disposed in a gap between the back surface 25 b of the horizontal wall portion 25 and the front surface 17 a of the circuit board 17. The spring portion 43 biases the back surface 25b of the horizontal wall portion 25 and the front surface 17a of the circuit board 17 away from each other, and a gap is formed between the second display portion 13 and the circuit board 17. Even in a state where there is, the biasing state is maintained.
As described above, when the spring portion 43 is biased, the tip of the spring portion 43 is in contact with the ground electrode 17 b formed on the surface 17 a of the circuit board 17. That is, in this state, the connection terminal portion 39 comes into elastic contact with the ground electrode 17b of the circuit board 17, and the static eliminating member 33 and the ground electrode 17b are electrically connected.
The second display unit 13 and the static electricity removing member 33 configured as described above constitute a static electricity countermeasure unit 50 that releases static electricity to the ground electrode 17b of the circuit board 17.

As shown in FIG. 4, the first display unit 11, the circuit board 17, and the second display unit 13 arranged inside the second housing 3 are sequentially from the inner surface 31 a of the front case 31 in the thickness direction. The display surface 11a of the first display unit 11 is exposed outward from an opening 31b formed in the front case 31. In addition, the inner surface 31a of the front case 31 points out the surface located in the other side of the opposing surface 3c.
The front case 31 is formed with a protruding wall portion 45 protruding from the inner surface 31a. The protruding wall portion 45 is disposed so as to surround the first display portion 11 and the side portions of the circuit board 17, and plays a role of accommodating the first display portion 11 and the circuit board 17. In addition, a hole 45 a that engages the flange portion 27 a of the protruding portion 23 formed in the second display portion 13 is formed at the proximal end portion of the protruding wall portion 45.
In a state where the flange portion 27a is engaged with the hole 45a, the second display portion 13 comes into contact with the surface 17a of the circuit board 17 and is fixed to the front case 31.

In manufacturing the cellular phone 1 configured as described above, when the two display units 11 and 13 and the circuit board 17 are incorporated in the second housing 3, first, the protrusion of the second display unit 13 is performed. The locking part 41 of the static electricity removing member 33 is engaged with the part 23 and the second static electricity removing member 33 is attached to the second display part 13. At the time of attachment, the frame body part 35 and the side wall part 37 of the static electricity removing member 33 are arranged around the second display part 13. At this time, the locking portions 41 are engaged with the horizontal wall portions 25 of the protrusions 23 arranged at symmetrical positions with the display unit main body 19 interposed therebetween. 2 display parts 13 are pinched.
Next, the two display units 11 and 13 and the circuit board 17 are assembled in the second housing 3. At the time of this incorporation, the first display unit 11, the circuit board 17, and the second display unit 13 are sequentially stacked from the inner surface 31a of the front case 31. At this time, the arrangement of the first display portion 11 and the circuit board 17 with respect to the front case 31 is determined by the protruding wall portion 45.

Thereafter, the second display unit 13 is disposed on the surface 17 a of the circuit board 17. At this time, the second display portion 13 and the front case 31 are fixed by engaging the flange portion 27 a of the protruding portion 23 with the hole 45 a of the protruding wall portion 45.
In this state, the spring portion 43 of the connection terminal portion 39 is pressed against the horizontal wall portion 25, the tip of the spring portion 43 comes into contact with the ground electrode 17b, and the static electricity removing member 33 and the ground electrode 17b are electrically connected to each other. At the same time, the second display portion 13 and the circuit board 17 are biased in a direction away from each other by the biasing force of the spring portion 43. In this state, since the first display unit 11 and the circuit board 17 are sandwiched between the second display unit 13 and the front case 31, it is possible to prevent the first display unit 11 and the circuit board 17 from coming out of the front case 31.

  Finally, a rear case (not shown) that constitutes the second housing 3 together with the front case 31 is arranged on the display surface 13a side of the second display unit 13, whereby the two display units 11 and 13 and the circuit are arranged. The operation of incorporating the substrate 17 into the second housing 3 is completed. The rear case constitutes the outer surface 3d side of the second housing 3, and has an opening that exposes the display surface 13a of the second display unit 13 to the outside.

As described above, according to this static electricity removing member 33, instead of attaching a metal foil to an electrical component such as the second display unit 13 by bonding as in the prior art, the static electricity removing member 33 is used for the second display. The frame body portion 35 and the side wall portion 37 of the static electricity removing member 33 can be easily placed around the second display portion 13 simply by covering the portion 13 and engaging the locking portion 41 of the static electricity removing member 33 with the protruding portion 23. Therefore, the assembly work efficiency of the mobile phone 1 can be improved.
Further, since the static electricity removing member 33 is attached to the second display portion 13 using the locking portion 41 and the protruding portion 23, the static electricity removing member 33 can be easily attached to and detached from the second display portion 13. In addition, maintenance of the second display unit 13 can be easily performed.

Further, since the second display unit 13 is held by the pair of locking units 41, the second display unit 13 and the static electricity removing member 33 can be securely held.
Further, since the locking portion 41 for fixing the static electricity removing member 33 to the second display portion 13 is included in the configuration of the connection terminal portion 39 for releasing static electricity to the ground electrode 17b, the shape of the static electricity removing member 33 is simplified. Thus, the manufacturing cost of the static eliminating member 33 can be reduced.

Further, in the state where the second display unit 13 is arranged on the surface 17 a of the circuit board 17, the spring unit 43 is elastically deformed by the pressing force of the horizontal wall unit 25 of the second display unit 13, and the spring unit 43 is attached. Since the electrical connection between the static electricity removing member 33 and the ground electrode 17b can be maintained by the force, the static electricity generated in the vicinity of the second display portion 13 can be surely released from the frame body portion 35 to the ground electrode 17b. Therefore, it is possible to improve the reliability of the second display unit 13 against static electricity.
In particular, when there is play in the engagement state between the flange portion 27a of the second display portion 13 and the hole 45a of the front case 31, that is, in the state where the flange portion 27a is engaged with the hole 45a, the second is caused by vibration or the like. Even if the display unit 13 may float from the surface 17 a of the circuit board 17, the electrical connection between the static electricity removing member 33 and the ground electrode 17 b of the circuit board 17 can be maintained by the biasing force of the spring unit 43.

Further, according to the static electricity countermeasure unit 50, the spring portion 43 is located in the gap between the back surface 25 b of the horizontal wall portion 25 located above the back surface 19 b of the display unit main body 19 in the thickness direction and the surface 17 a of the circuit board 17. Therefore, the back surface 19 b of the second display unit 13 can be brought into contact with the front surface 17 a of the circuit board 17. Therefore, the thickness of the cellular phone 1 can be reduced by reducing the thickness of the second display portion 13 and the circuit board 17 that are overlapped.
Furthermore, since the surface on which the spring portion 43 is arranged in the second display portion 13 is formed on the protruding portion 23 protruding from the side surface 19c of the display portion main body 19, the shape of the display portion main body 19 is simplified, The display unit body 19 can be easily manufactured.

Further, the engagement of the static electricity removing member 33 with the engaging portion 41 and the arrangement of the spring portion 43 in the second display portion 13 are both performed using the same protruding portion 23. The locking portion 41 engages with the horizontal wall portion 25 of the protruding portion 23, and the spring portion 43 is disposed on the back surface 25 b of the horizontal wall portion 25. For this reason, the shape of the 2nd display part 13 can be simplified and reduction of the manufacturing cost of the 2nd display part 13 can be aimed at.
Further, when the two display units 11 and 13 and the circuit board 17 are incorporated in the second housing 3, the first display unit 11, the circuit board 17, and the second display unit are formed on the inner surface 31 a of the front case 31. 13 and the rear case in order, in the state where the second display unit 13 is arranged on the surface 17a of the circuit board 17, the static eliminating member 33 and the surface 17a of the circuit board 17 are exposed to the outside. . Therefore, the electrical connection between the static electricity removing member 33 and the ground electrode 17b can be easily confirmed before the rear case is attached.

  In the above embodiment, the locking portion 41 for fixing the static electricity removing member 33 to the second display portion 13 is included in the configuration of the connection terminal portion 39 that is electrically connected to the ground electrode of the circuit board 17. However, the present invention is not limited to this, and may be configured independently from the connection terminal portion 39. That is, the locking portion may be formed on the side wall portion 37 of the static electricity removing member 33, for example. However, in the case of this configuration, it is necessary to separately form an engaging portion that engages with the locking portion in the display portion main body 19. Note that the engaging portion in this case may be, for example, a protruding portion protruding from the side surface of the display main body 19 or a concave portion recessed from the same side surface.

Moreover, although the static electricity removal member 33 of the said embodiment shall be attached to the 2nd display part 13, it is not restricted to this, If it attaches to the electrical component exposed from the outer side of a housing | casing at least Good. That is, as the electrical component, for example, the first display unit 11, the microphone unit 9, the speaker unit 15, and the camera unit may be used. Here, the main surface in the case where the electrical component is the microphone unit 9 refers to a surface including the sound collection port, and the main surface in the case of the speaker unit 15 refers to the surface including the sound emission port. The main surface when the electrical component is a camera unit refers to a surface including an imaging window.
Further, the present invention is applied to the mobile phone 1 having two casings 2 and 3 that can be overlapped with each other. However, the present invention is not limited to the mobile phone 1 and the outside of the casing, such as a PDA or a digital camera. What is necessary is just a portable electronic device provided with the electrical component exposed to.

  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.

It is a top view by the side of an opposing surface which shows the state which opened two housing | casings which comprise the mobile telephone which concerns on one Embodiment of this invention mutually. FIG. 2 is a plan view on the outer surface side showing a state where two casings are opened from each other in the mobile phone of FIG. 1. FIG. 3 is an enlarged perspective view showing a second display unit and a shield member in the mobile phone of FIG. 1. FIG. 3 is a partial enlarged cross-sectional view showing a second display unit fixed to a second housing in the mobile phone of FIG. 1. FIG. 2 is a partially enlarged perspective view showing a connection terminal portion of a shield member in the mobile phone of FIG. 1.

Explanation of symbols

1 Mobile phone (mobile terminal device)
3 2nd housing | casing 13 2nd display part (electrical component)
17 Circuit board 17b Ground electrode 19 Display body (main body)
19a Top surface (main surface)
19c Side 23 Protrusion 25 Horizontal wall (engagement part)
27 Vertical wall portion 33 Static electricity removing member 35 Frame portion 39 Connection terminal portion 41 Locking portion 43 Spring portion

Claims (6)

A static eliminating member for electrical parts formed of a conductive material,
A frame body portion covering at least a peripheral edge of the main surface of the electrical component; and a connection terminal portion integrally formed with the frame body portion and extending downward. The connection terminal portion is associated with the electrical component. A static electricity removing member comprising: a mating engaging portion; and an elastically deformable spring portion.   A pair of the connection terminal portions are provided across the electrical component, the spring portion is provided on the distal end side of the connection terminal portion, and the locking portion is provided between the spring portion and a root portion of the connection terminal portion. The static eliminating member according to claim 1, wherein the static eliminating member is provided.   3. A circuit board having the static electricity removing member according to claim 1 or 2, an electrical component having an engaging portion that engages with a locking portion of the electrostatic removing member on a side surface adjacent to the main surface, and a ground electrode. And a frame body portion of the static electricity removing member is disposed on a peripheral edge of a main surface of the electrical component, and a locking portion of the static electricity removing member is engaged with an engaging portion of the electrical component, and the static electricity A static electricity countermeasure unit, wherein the connection terminal portion of the removal member is in elastic contact with the ground electrode of the circuit board.   The spring part of the said connection terminal part is elastically deformed by the pressing force by the engaging part of the said electrical component, and the said connection terminal part is made to elastically contact with the ground electrode of the said circuit board, The Claim 3 characterized by the above-mentioned. Anti-static unit.   A portable electronic device comprising the static electricity countermeasure unit according to claim 3 or 4 in a housing. On the side surface of the electrical component, there is provided a protruding portion composed of a horizontal wall portion protruding outward and a vertical wall portion extending downward from the horizontal wall portion,
The projecting portion is engaged with and fixed to the casing, and the engaging portion is provided on the horizontal wall portion,
When the electric component is fixed in the housing, the spring portion of the connection terminal portion is elastically deformed by the pressing force of the engagement portion, and the connection terminal portion is brought into elastic contact with the ground electrode of the circuit board. The portable electronic device according to claim 5.

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