JP4628724B2 - Portable electronic devices - Google Patents

Description

  The present invention relates to a portable electronic device.

  2. Description of the Related Art Conventionally, portable electronic devices such as mobile phones, simplified mobile phones (PHS (registered trademark)), PDAs (Personal Digital Assistants), and digital cameras display various types of information such as images and characters inside the housing. A display device such as a liquid crystal display device and a circuit board are provided. This display device is arranged so that the display surface for displaying various information is exposed to the outside of the housing, and a circuit is provided around the display device for the purpose of preventing malfunction of the display device due to static electricity. Various devices for releasing static electricity to the ground electrode formed on the substrate have been made (for example, see Patent Document 1).

As a display unit that has been devised to release static electricity from the display device, for example, there is a display unit that is configured by attaching a static eliminating member formed of a thin metal foil to the surface of the display device excluding the display surface. . Here, the display device to which the static electricity removing member is attached and the circuit board are arranged in the thickness direction of the housing via a conductive connector such as a spring, and the static electricity removing member is arranged by this connector. Is electrically connected to the ground electrode of the circuit board.
JP 2003-18264 A

When carrying or using the conventional portable electronic device, an external force may be applied in the thickness direction of the display device, and the display device is bent and deformed by the external force. In particular, when an excessive static pressure load is applied to the center portion of the display surface from the thickness direction, there is a possibility that cracks may occur in the glass substrate constituting the display device.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a portable electronic device including a display unit capable of taking measures against static electricity of a display device and preventing deformation of the display device due to external force. Yes.

  In order to solve the above problems, the present invention proposes the following means.

Portable electronic device according to the present invention comprises a housing, wherein while being positioned inside the housing, the first display unit and those of the first display section of the substantially plate-shaped having a display area in the thickness direction of the surface A display unit including a static electricity removing member to be attached ; a circuit board disposed inside the casing and having a ground electrode formed on a surface thereof; and a first circuit board disposed on the back side of the circuit board inside the casing. 2 at least one of the side surface of the first display unit adjacent to the back surface and the plate-shaped bottom wall portion disposed on substantially the entire back surface of the first display unit. A plate-like side wall portion disposed in part, and the bottom wall portion and the side wall portion are integrally formed of a conductive material, and the second display portion includes a display portion main body and the display An engaging portion protruding from the main body, and the housing engages with the engaging portion An engagement portion, wherein with the bottom wall portion and the circuit board so as to be in contact with the ground electrode and the display unit is superimposed on the thickness direction, the engaging portion and the engaged portion The circuit board and the first display unit are biased toward each other by engaging in the thickness direction of the first display unit.

According to the present invention, even if static electricity enters from the surface side of the display device, it is guided to the side wall portion of the static electricity removing member disposed on the side surface of the display device, so that malfunction of the display device due to the entry of static electricity can be prevented. .
In addition, the plate-like side wall portion and bottom wall portion constituting the static electricity removing member are integrally formed and disposed on the back surface and side surface of the display device, so that an external force is applied in the thickness direction of the display device. The display device can be prevented from being bent even if the display device is bent, and the display device can be prevented from being deformed based on the bending.

  1 to 8 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, the 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 that is located on the opposite side of 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 casing 3, there are two display units 11 and 13 having display surfaces 11a and 13a for displaying various information on the surface, such as an LCD (Liquid Crystal Display), a speaker unit 15 for a call, and A circuit board (not shown) for electrical connection with the operation unit 7 and the microphone unit 9 provided in the first housing 2 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 display surface (display area) 11a of the first display unit (display device) 11 and the speaker unit 15 are opposed to the first housing 2 in a state where the two housings 2 and 3 are overlapped with each other. It is exposed to the outside from the facing surface 3c of the casing 3. In addition, the display surface 13a of the second display unit 13 is outward from the outer surface 3d of the second housing 3 located on the opposite side of the facing surface 3c, regardless of whether the two housings 2 and 3 are opened or closed. Is exposed. In addition, the code | symbol 16 in a figure is an antenna for performing radio | wireless communication with a base station.

The second housing 3 includes a front case 17 constituting the facing surface 3 c side of the second housing 3 and a rear case 19 constituting the outer surface 3 d side of the second housing 3. The front case 17 and the rear case 19 can be coupled to each other in the thickness direction of the second housing 3. As shown in FIGS. 3 and 4, the first display unit 11, the circuit board 21, and the second display unit 13 are arranged so as to overlap in order from the inner surface 17 a side of the front case 17. Yes.
The first display unit 11 is formed in a thick plate shape that is substantially rectangular in plan view, and is arranged on the inner surface 17 a of the front case 17. Here, the front case 17 is formed with a rectangular opening 17b in a plan view penetrating from the facing surface 3c side to the inner surface 17a side, and the display surface 11a of the first display unit 11 is formed in the opening 17b. It is designed to be exposed to the outside. A flexible wiring board 23 for electrical connection to the circuit board 21 is integrally attached to one end portion in the longitudinal direction (X direction) of the first display unit 11.

The first display unit 11 is provided with a static electricity removing member 25 for releasing static electricity generated in the vicinity of the first display unit 11 to a ground electrode (not shown) formed on the circuit board 21. . The static eliminating member 25 is made of a conductive material such as metal, conductive plastic, or metal-plated plastic, and is disposed on the entire back surface 11b of the first display unit 11 located on the opposite side of the display surface 11a. It has a plate-like bottom wall portion 27 arranged and a plurality of side wall portions 29 adjacent to the back surface 11b and arranged on the side surface 11c of the first display portion 11 along the thickness direction (Z direction). The side wall 29 is integrally formed so as to be bent.
A plurality of circular holes 31 penetrating in the thickness direction are formed in the bottom wall portion 27. The plurality of holes 31 are arranged in a plurality of rows along the longitudinal direction of the first display unit 11, and the holes 31 in adjacent rows are arranged so as to be offset from each other.

  A pair of insertion holes 33 for positioning the static electricity removing member 25 are formed at both ends in the width direction of the bottom wall portion 27. That is, a pair of projecting portions 35 projecting in the thickness direction (Z direction) are formed at both ends in the width direction of the back surface 11b of the first display unit 11. And when attaching the static eliminating member 25 to the 1st display part 11, each positioning part of the static eliminating member 25 with respect to the 1st display part 11 is easily performed by inserting each protrusion part 35 in the insertion hole 33, respectively. be able to.

Furthermore, two protrusions projecting in a direction away from the back surface 11 b of the first display unit 11 at one end in the width direction of the static electricity removal member 25 adjacent to the one insertion hole 33 in the bottom wall 27. 37 is formed. These two protrusions 37 are arranged side by side in the longitudinal direction of the bottom wall 27. Moreover, as shown in FIG.4 (b), each projection part 37 is depressed with respect to the surface 27a of the bottom wall part 27 which contact | connects the back surface 11b of the 1st display part 11, and is on the opposite side to the contact surface 27a. It protrudes from the back surface 27b of the bottom wall portion 27 located at the surface, and its surface is spherical.
These protrusions 37 come into contact with a ground electrode (not shown) formed on the front surface 21 a of the circuit board 21 in a state where the circuit board 21 is overlapped facing the back surface 27 b of the bottom wall portion 27. Yes.

The plurality of side wall portions 29 are respectively disposed on a pair of side surfaces 11c located at both end portions in the width direction (Y direction) of the first display portion 11, and are configured to sandwich the first display portion 11 from the width direction. ing.
Engagement holes 29a penetrating in the thickness direction are formed in the side wall portions 29 arranged at both ends of the first display portion 11 in the longitudinal direction. The engagement hole 29a has a claw portion 39 projecting from the side surface 11c of the first display portion 11 in a state where the bottom wall portion 27 and the side wall portion 29 are arranged on the back surface 11b and the side surface 11c of the first display portion 11, respectively. The static electricity removing member 25 is prevented from being unexpectedly detached from the first display unit 11.

The first display unit 11 and the static electricity removing member 25 constitute a display unit 40 for static electricity countermeasures of the first display unit 11.
A pair of concave fitting holes 21c are formed at both ends in the width direction of the circuit board 21 arranged on the back surface 27b side of the static electricity removing member 25. These fitting holes 21c are used to fit the respective protrusions 35 of the first display unit 11. In a state where the protrusions 35 are fitted into the fitting holes 21c, the first static electricity removing member 25 is attached. The one display unit 11 and the circuit board 21 are fixed to each other, and mutual displacement can be prevented.

As shown in FIGS. 3 and 5, the second display unit 13 is disposed on the back surface 21b of the circuit board 21 located on the opposite side of the front surface 21a, and includes a display surface 13a exposed to the outside. A pair of protrusions projecting from a substantially rectangular plate-shaped display unit body 41, a flexible wiring board 43 attached to one end of the display unit body 41 in the longitudinal direction, and side surfaces 41c located at both ends of the display unit body 41 in the width direction. Projecting portion 45. The flexible wiring board 43 is for electrically connecting the display unit main body 41 to the circuit board 21.
The pair of projecting portions 45 are disposed at symmetrical positions with respect to the display portion main body 41. Each protrusion 45 has a substantially plate-like horizontal wall 47 extending substantially parallel to the display surface 13a from the side surface 41c of the display unit main body 41, and a vertical extending from the tip of the horizontal wall 47 to the circuit board 21 side. And a wall 49. The vertical wall portion 49 is formed so as to protrude downward in the thickness direction from the back surface 41b of the display portion main body 41, and a substantially wedge-shaped flange portion 49a is formed at the tip thereof.

The horizontal wall portion 47 is formed in a rectangular plate shape in plan view that is thinner than the thickness of the display portion main body 41, and its upper surface 47a is thicker than the top surface 19a of the display portion main body 41 including the display surface 13a. It is arranged at a position that is lowered downward in the direction. Further, the horizontal wall portion 47 is disposed at a position where the lower surface 47b forms the same plane as the back surface 41b of the display portion main body 41 located on the opposite side of the display surface 13a.
The horizontal wall portion 47 includes a through hole 51 having a substantially rectangular shape in plan view that penetrates in the thickness direction, and a frame portion 53 that forms the periphery of the through hole. The pair of connecting portions 55 extending in the extending direction of the horizontal wall portion 47 across the hole 51 has a thickness that can be elastically deformed, and the interval between the pair of protrusions is formed on the static electricity removing member 25. The interval between the portions 37 is substantially equal.

  As shown in FIGS. 6 and 7, the first display unit 11, the circuit board 21, and the second display unit 13 configured as described above are sequentially stacked on the inner surface 17 a side of the front case 17. In this case, the first display portion 11 and the circuit board 21 are enclosed and accommodated by the protruding wall portion 61 formed to protrude from the inner surface 17a of the front case 17. In this accommodated state, the protrusion 37 of the static electricity removing member 25 is in contact with the ground electrode 63 formed on the front surface 21 a of the circuit board 21, and the back surface 21 b of the circuit board 21 is the protruding wall portion 61 of the front case 17. It is arranged at a position protruding from the front end of the.

Further, in this state, the flange portion 49 a formed on the vertical wall portion 49 of the second display portion 13 is engaged with the hole 61 a formed on the proximal end portion of the protruding wall portion 61. In this engaged state, the first display unit 11 and the circuit board 21 are sandwiched between the front case 17 and the second display unit 13, and the second display unit 13 contacts the back surface 21 b of the circuit board 21. Thus, the circuit board 21 is biased toward the back surface 27 b of the static electricity removing member 25 by the second display unit 13.
Further, in this state, each connecting portion 55 of one horizontal wall portion 47 is arranged at a position where each projection portion 37 of the static electricity removing member 25 and the horizontal wall portion 47 overlap in the thickness direction, and as described above. When the circuit board 21 is urged, the horizontal wall 47 is elastically deformed in the thickness direction. Then, the circuit board 21 is biased toward the protrusions 37 in accordance with the elastic deformation of the connecting portions 55.

  As shown in FIG. 8, a pair of ribs 65 protruding from the inner surface 19 a of the rear case 19 facing the second display unit 13 are formed at both ends in the width direction of the rear case 19. These ribs 65 press the horizontal wall 47 of the second display unit 13 toward the circuit board 21 in a state where the front case 17 and the rear case 19 are combined, and the second display unit 13 is prevented from being displaced between the circuit board 21 and the first display unit 11.

By configuring the mobile phone 1 as described above, even if static electricity enters from the display surface 11a side of the first display unit 11, the static electricity removing member 25 disposed on the side surface 11c of the first display unit 11 Since it can be guided to the side wall part 29 and escape to the ground electrode 63 of the circuit board 21, malfunction of the first display part 11 due to intrusion of static electricity can be prevented.
Further, by engaging the vertical wall portion 49 of the second display portion 13 with the protruding wall portion 61 of the front case 17, the circuit board 21 is urged toward the back surface 27 b of the static electricity removing member 25 and is horizontal. The ground electrode 63 is pressed against each protrusion 37 by the connecting portion 55 of the wall portion 47. That is, the circuit board 21 and the first display unit 11 are urged in a direction to approach each other so that the protruding portion 37 contacts the ground electrode 63, so that vibration occurs in the thickness direction of the second housing 3. Even if is added, the protrusion 37 is prevented from being separated from the ground electrode 63, and the electrical connection between the static electricity removing member 25 and the ground electrode 63 can be reliably maintained.

Further, since the protrusion 37 that is brought into contact with the ground electrode 63 is formed integrally with the bottom wall portion 27 of the static electricity removing member 25, a connection such as a spring is provided between the static electricity removing member and the ground electrode as in the prior art. There is no need to separately provide a child, and the thickness of the first display unit 11 and the circuit board 21 can be reduced to reduce the thickness of the mobile phone 1.
Further, since the number of components of the display unit 40 can be reduced by eliminating the conventional connectors, the display unit 40 can be easily assembled and the cost of the display unit 40 can be reduced. Can do.

Further, the bottom wall portion 27 and the side wall portion 29 constituting the static electricity removing member 25 are integrally formed so as to bend the plate-like member, and are disposed on the back surface 11b and the side surface 11c of the first display unit 11. Therefore, even if an external force is applied in the thickness direction of the first display unit 11, the first display unit 11 is suppressed from being bent, and the first display unit 11 is deformed based on the bending. Can be prevented. Therefore, for example, even if a static pressure load is applied to the central portion of the display surface 11a from the thickness direction, it is possible to reliably prevent cracks from occurring in the glass substrate constituting the first display portion 11.
In addition, since the plurality of holes 31 are formed in the bottom wall portion 27, the weight of the static electricity removing member 25 can be reduced without impairing the strength for protecting the first display portion 11, The display unit 40 and the mobile phone 1 can be reduced in weight.

In addition, by fitting the fitting hole 21c of the circuit board 21 into the protruding portion 35 of the first display unit 11, the first display with the static electricity removing member 25 attached even if vibration is applied to the mobile phone 1. Since the relative position between the portion 11 and the circuit board 21 can be prevented from shifting, the ground electrode 63 can be prevented from being scraped by rubbing against the protrusion 37 of the static electricity removing member 25.
Furthermore, since the surface of the projection 37 that contacts the ground electrode 63 is formed in a spherical shape, even if friction occurs between the projection 37 and the ground electrode 63, the ground electrode 63 is scraped by the projection 37. Thus, the electrical connection between the static electricity removing member 25 and the ground electrode 63 can be stabilized.

When the two display units 11 and 13 and the circuit board 21 are incorporated in the second housing 3, the first display unit 11, the circuit board 21, and the second display unit are provided on the inner surface 17 a of the front case 17. 13 and the rear case 19 can be stacked in order, so that the second housing 3 can be easily assembled and the manufacturing efficiency of the mobile phone 1 can be improved.
Further, since the static electricity removing member 25 is fixed to the first display portion 11 by engaging the claw portion 39 of the first display portion 11 with the engagement hole 29a of the side wall portion 29, the static electricity removing member 25 is The first display unit 11 can be easily attached and detached, and the first display unit 11 can be easily maintained.

In the above embodiment, the circuit board 21 is urged toward the projections 37 using the protrusions 45 for engaging the second display unit 13 with the front case 17. The circuit board 21 may be urged toward at least the protrusion 37 without being limited thereto.
Moreover, although the 1st display part 11 and the circuit board 21 were inserted | pinched by the 2nd display part 13 and the front case 17, it is not restricted to this, At least the 1st display part 11 and the circuit board 21 are What is necessary is just to be urged | biased in the direction which approaches. That is, the first display unit 11 and the circuit board 21 may be sandwiched between the front case 17 and the rear case 19, or a member for sandwiching the first display unit 11 and the circuit board 21 may be separately prepared. Absent.

Furthermore, although the two protrusions 37 are arranged side by side in the longitudinal direction of the bottom wall portion 27, the present invention is not limited to this and may be arranged in the width direction of the bottom wall portion 27.
Moreover, although the projection part 37 was distribute | arranged only to the one end part of the width direction of the static eliminating member 25, it may not be restricted to this but may be formed in both ends. However, the closer the contact position between each projection 37 and the ground electrode 63 is, the smaller the electrical influence when a contact failure between one projection 37 and the ground electrode 63 occurs. It is preferable to arrange only at the one end.

  Further, although two protrusions 37 are formed, the present invention is not limited to this, and at least one protrusion may be formed. However, when there are a plurality of protrusions 37, even if dust or the like enters between one protrusion 37 and the ground electrode 63 and does not contact each other, the other protrusions 37 and the ground electrode 63 It is preferable to form a plurality of protrusions 37 in order to prevent electrical connection failure between the circuit board 21 and the static electricity removing member 25.

If the number of the protrusions 37 is excessively large, the contact between the protrusions 37 and the ground electrode 63 becomes unstable unless the heights of the protrusions 37 are accurately aligned. The number is preferably about two.
Further, the side wall 29 of the static electricity removing member 25 is disposed only on a part of the side surface 11c of the first display unit 11. However, the present invention is not limited thereto, and may be disposed on the entire side surface 11c. I do not care.

Further, although the static electricity removing member 25 is detachably attached to the first display unit 11, it is not limited thereto, and for example, it is attached to the first display unit 11 with an adhesive or the like. Also good.
In addition, 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. Any portable electronic device provided with a display device exposed to light may be used.

  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 perspective view by the side of the 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 perspective view of an 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 exploded perspective view showing a state in which the first display unit, the circuit board, and the second display unit arranged in the second casing are arranged in the overlapping order in the mobile phone of FIG. 1. 1 shows a state in which a static electricity removing member is attached to a first display unit in the mobile phone of FIG. 1, (a) is an enlarged perspective view, and (b) is a cross-sectional view taken along the line AA of (a). It is. FIG. 3 is an enlarged perspective view showing a second display unit in the mobile phone of FIG. 1. FIG. 2 is a perspective view illustrating a state in which the first display unit, the circuit board, and the second display unit are sequentially overlapped and attached to the inner surface of the front case in the mobile phone of FIG. FIG. 3 is a partial enlarged cross-sectional view showing a first display unit, a circuit board, and a second display unit fixed to a front case in the mobile phone of FIG. 1. FIG. 4 is an enlarged perspective view showing the arrangement of the second display unit with respect to the rear case in the mobile phone of FIG. 1.

Explanation of symbols

1 Mobile phone (mobile terminal device)
3 2nd housing | casing 11 1st display part (display apparatus)
11a Display surface (display area)
11b Back surface 11c Side surface 21 Circuit board 21a Surface 25 Static electricity removing member 27 Bottom wall portion 29 Side wall portion 31 Hole 37 Projection portion 40 Display unit 63 Ground electrode

Claims (1)

A housing,
Wherein while being positioned inside the housing, and a display unit having a substantially plate-shaped first display unit and electrostatic removal member attached to those first display unit having a display area in the thickness direction of the surface,
A circuit board disposed inside the housing and having a ground electrode formed on a surface thereof;
A second display unit disposed on the back side of the circuit board inside the housing;
With
A plate-like bottom wall portion disposed on substantially the entire back surface of the first display portion and a plate shape disposed on at least a part of the side surface of the first display portion adjacent to the back surface. A side wall portion of
The bottom wall portion and the side wall portion are integrally formed of a conductive material,
The second display unit has a display unit main body and an engaging part protruding from the display unit main body,
The housing has an engaged portion with which the engaging portion is engaged,
The circuit board and the display unit are overlapped in the thickness direction so that the bottom wall portion is in contact with the ground electrode, and the engagement portion is a thickness of the engaged portion and the first display portion. The portable electronic device according to claim 1, wherein the circuit board and the first display unit are biased toward each other by engaging in a vertical direction .

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