JP6238863B2 - Electronics - Google Patents

Description

  The present invention relates to a countermeasure against static electricity of an electronic device having a member connected to a flexible printed circuit board.

  For example, in the liquid crystal display device described in Patent Document 1, a flexible printed circuit board (hereinafter referred to as FPC) that connects a display panel and a circuit board to a conductive frame-like frame disposed in front of the display panel is used. A covering barrier and an energizing arm piece connected to the ground pattern are provided. According to this configuration, static electricity generated on the display panel side of the liquid crystal display device is transmitted to the barrier portion of the frame-shaped frame and is discharged to the ground via the energizing arm piece. Thereby, static electricity is not transmitted to FPC, but the electrostatic breakdown of the electronic component mounted on FPC can be prevented.

JP 2010-271381 A

In Patent Document 1, a frame-like frame is disposed in front of the display panel. For this reason, in the product used by the user, a design panel that is hidden so that the frame-shaped frame is not exposed is further attached to the front.
On the other hand, in recent years, there has been a demand for electronic devices that have been reduced in size while maintaining the screen size, and electronic devices having a design panel with the same size as the display screen have become widespread.
Such an electronic device uses a fine-framed design panel, and has an appearance that the design panel borders the display screen.
Therefore, in this design panel, the frame-shaped frame cannot be hidden, and the static electricity countermeasure structure of Patent Document 1 cannot be adopted.

Further, when a touch panel is further mounted on the electronic device having a thin frame design panel, for example, the touch panel is held in front of the display panel in the thin frame design panel. And FPC for driving a touch panel is connected to the outer periphery part of a touch panel so that a display may not be inhibited. For this reason, in the thin frame-shaped design panel, the creepage distance of the FPC cannot be increased from the appearance surface.
Therefore, the static electricity generated on the touch panel is easily transmitted to the FPC, and the electronic component mounted on the FPC may be electrostatically broken.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain an electronic device that can achieve both miniaturization and countermeasures against static electricity.

  An electronic device according to the present invention includes an electronic member to which a flexible printed circuit board is connected, a conductive member electrically connected to a ground, a frame that holds the electronic member outside the electronic device, and holds the conductive member inside the electronic device. -Shaped panel, a plate portion disposed on the panel and disposed at a position where a flexible printed circuit board extending from the electronic member toward the inside of the electronic device straddles, and a plate spring portion extending from the plate portion. The leaf spring portion is interposed between the electronic member and the conductive member, and abuts on the conductive member with an elastic force from the electronic member side toward the conductive member.

  According to the present invention, there is an effect that both miniaturization and countermeasures against static electricity can be achieved.

1 is an overall perspective view of an electronic apparatus according to Embodiment 1 of the present invention. It is a disassembled perspective view of the touch display part in Embodiment 1 of this invention. It is an expansion perspective view of the design panel in Embodiment 1 of this invention. It is an expanded sectional perspective view of the touch display part in Embodiment 1 of this invention. It is an expanded sectional view of the touch display part in Embodiment 1 of this invention. It is an expanded sectional perspective view of the touch display part of the electronic device used as the reference example for helping the understanding of the electronic device which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
1 is an overall perspective view of an electronic apparatus according to Embodiment 1 of the present invention. This electronic device is used as, for example, a vehicle-mounted device, and includes a touch display unit 1 that displays various information, accepts user operations, and the like, and a main body unit 2 that performs navigation processing, media playback processing, and the like.

  FIG. 2 is an exploded perspective view of the touch display unit 1. The touch display unit 1 includes a touch panel (electronic member) 3 to which a user operation is input, a design panel (panel) 4 that holds the touch panel 3, an LCD (Liquid Crystal Display, display member) 5 that displays various types of information, An LCD holder (conductive member) 6 that holds the LCD 5, a substrate 7, a substrate holder 8 that holds the substrate 7, a shield monitor 9 that protects the substrate 7, and the like. The constituent members of the touch display unit 1 are arranged in the order of the touch panel 3, the design panel 4, the LCD holder 6, the LCD 5, the substrate holder 8, the substrate 7, and the shield monitor 9 from the front.

  The substantially rectangular touch panel 3 has one end of an FPC 10 in which an electronic component such as an IC (Integrated Circuit) 12 shown in FIG. 4 and FIG. It is connected. Although not shown in the disassembled state shown in FIG. 2, the other end of the FPC 10 is connected to the substrate 7. Thereby, the touch panel 3 and the board | substrate 7 will be in the state electrically connected via FPC10. The touch panel 3 detects the contact position or the proximity position when the user's finger contacts or approaches, and outputs it as an electrical signal via the FPC 10.

The design panel 4 is a substantially rectangular and frame-shaped member, and a substantially rectangular opening 41 is surrounded by an outer peripheral wall 42. The design panel 4 is made of, for example, a resin.
The substantially rectangular LCD 5 is electrically connected to the substrate 7 and performs display in accordance with an electric signal input from the substrate 7.
The LCD holder 6 that holds the LCD 5 is a substantially rectangular and frame-shaped member, and a central portion thereof is a substantially rectangular opening 61. A claw 63 having a mounting hole 62 extends outward from the side of the LCD holder 6. The lower side portion of the LCD holder 6 is a support wall 64 that contacts the surface of the LCD 5 and supports the LCD 5, and a notch 65 is formed in the center portion of the lower side of the support wall 64. The LCD holder 6 is made of metal.

The substrate holder 8 is a substantially rectangular and plate-like member, and is made of metal. A mounting hole 81 is formed in the peripheral edge on the side of the substrate holder 8. Similarly, a claw 83 having a mounting hole 82 rises rearward at the side peripheral edge.
The shield monitor 9 for protecting the substrate 7 is made of metal like the substrate holder 8.

FIG. 3 is an enlarged perspective view of the design panel 4. Specifically, the central part of the lower side surrounded by the dotted line in FIG. 2 is enlarged.
At the lower side of the frame-shaped design panel 4, a wall 44 rises substantially perpendicularly from the inner peripheral surface 43. A plate portion 111 of the shield member 11 is fixed to a portion of the inner peripheral surface 43 that is located behind the wall 44. In this fixing, a surface (fixed surface) attached to the inner peripheral surface 43 of the plate portion 111 is brought into close contact with the design panel 4 by using a double-sided tape, an adhesive, or the like.
The plate portion 111 has a substantially strip shape, and the direction along the wall 44 is the longitudinal direction X. The width of the plate portion 111, that is, the length in the longitudinal direction X is larger than the width L of the FPC 10 shown in FIG. A linear diaphragm 112 parallel to the longitudinal direction X is formed in the plate portion 111. The diaphragm 112 is formed so as to protrude toward the inside of the frame of the design panel 4 having a frame shape.

  The shield member 11 includes the plate portion 111 and the plate spring portion 113 that rises from both end portions of the plate portion 111 and extends parallel to the longitudinal direction X while facing the back surface of the wall 44 and faces each other. Is. The front end of the leaf spring portion 113 is curved so as to protrude toward the rear of the design panel 4, and the portion protruding most rearward is an abutment surface 114. The leaf spring portion 113 is elastically deformed when an external force that pushes the contact surface 114 is applied, and has a function of pushing back in the direction opposite to the external force.

In the wall 44 of the design panel 4, a notch 45 is formed in a portion between the two leaf spring portions 113.
Positioning holes 115 are formed at both ends in the longitudinal direction X of the plate portion 111, and the shield member 11 is designed to match the positioning protrusions 46 formed on the inner peripheral surface 43 of the design panel 4. It is positioned with respect to the inner peripheral surface 43 of the.

  As described above, the touch display unit 1 including the respective members is attached to the touch panel 3 so as to cover the opening 41 from the front of the design panel 4, and the LCD holder 6 is fitted and held from the rear of the design panel 4 and the LCD holder. 6 holds the LCD 5, attaches the substrate holder 8 from the back surface of the LCD 5, screws it using the attachment holes 62 of the LCD holder 6 and the attachment holes 81 of the substrate holder 8, and further attaches the substrate 7 to the back surface of the substrate holder 8. It is assembled by covering the board 7 with the shield monitor 9 after the attachment.

  That is, it is possible to assemble in order along the direction (A direction in FIG. 2) which is perpendicular to the surface of the touch panel 3 and goes from the rear to the front. When the touch panel 3 is attached to the design panel 4, the FPC 10 connected to the touch panel 3 is passed through the notch 45 of the design panel 4 so that the FPC 10 straddles the plate portion 111 of the shield member 11. After that, when the LCD holder 6 is attached to the design panel 4, the support wall 64 of the LCD holder 6 comes into contact with the contact surface 114 of the shield member 11 and the FPC 10 passes through the notch 65 of the support wall 64. . Thus, the FPC 10 drawn out from the back surface of the touch panel 3 to the rear of the LCD holder 6 is drawn under the LCD 5 and the substrate holder 8 and connected to the substrate 7 attached to the substrate holder 8.

  The assembled touch display unit 1 is attached to the main body unit 2 to be an electronic device. At this time, the claw 83 of the substrate holder 8 is screwed to a metal arm member (not shown) extending from the main body 2 using the attachment hole 82. The main body 2 is provided with a ground member (not shown) connected to the vehicle body that functions as a ground. A metal arm member screwed to the claw 83 of the board holder 8 is connected to the ground member. ing.

FIG. 4 is an enlarged cross-sectional perspective view of the touch display unit 1, and FIG. 5 is an enlarged cross-sectional view of the touch display unit 1. 4 and 5 show a state when the touch display unit 1 is cut so that the design panel 4 is cut at the position of the line BB in FIG. Note that the substrate 7, the substrate holder 8, and the shield monitor 9 are not shown.
The metal LCD holder 6 is in contact with the contact surface 114 of the metal shield member 11 and is in an electrically connected state.

At this time, for example, when the user tries to touch the touch panel 3 and static electricity is generated near the lower center of the touch panel 3 and enters the inside of the touch display unit 1, it is first guided to the shield member 11, and then It flows to the LCD holder 6 through the contact surface 114. The static electricity flow F ₁ at this time is shown in FIG.
The LCD holder 6 is provided in the main body 2 via a substrate holder 8 screwed to the claw 63 and a metal arm member extending from the main body 2 screwed to the claw 83 of the substrate holder 8. Further, a ground member (not shown) is electrically connected. For this reason, the static electricity flowing to the LCD holder 6 is discharged to a ground member (not shown) provided in the main body 2. Therefore, it is possible to prevent a situation in which the generated static electricity flows through the FPC 10 and the IC 12 mounted on the FPC 10 is destroyed.

On the other hand, FIG. 6 shows an enlarged cross-sectional perspective view when the touch display unit 1 is configured without providing the shield member 11 as a reference example for helping understanding of the present invention. In the configuration shown in FIG. 6, when static electricity is generated near the lower center of the touch panel 3 and enters the inside of the touch display unit 1, the static electricity flows through the FPC 10 and the IC 12 mounted on the FPC 10 is destroyed. FIG. 6 shows the flow of static electricity F ₂ at this time.

As can be seen from the above, the shield member 11 disposed behind the touch panel 3 to which the FPC 10 is connected functions as a member for countermeasures against static electricity.
Moreover, since the shield member 11 is a very compact member, it can be stored in a narrow space between the design panel 4 and the LCD holder 6, and the touch display unit 1 is large because the shield member 11 is arranged. It will not become.

Further, the shield member 11 is bent in a direction in which the leaf spring portion 113 approaches the wall 44 by the LCD holder 6 in contact with the contact surface 114, and generates an elastic force in a direction from the front to the rear of the touch display unit 1. Yes, the leaf spring portion 113 is not bent in the vertical direction (Z direction in FIG. 5) and does not generate an elastic force in the vertical direction inside the touch display portion 1.
If the leaf spring portion 113 is configured to bend in the vertical direction to generate an elastic force, the vertical deflection and elastic force generated inside the touch display portion 1 are generated by the touch display portion 1. The member positioned at the outermost appearance in the vertical direction, that is, the design panel 4 will finally absorb. Therefore, it is necessary to increase the thickness in the vertical direction of the outer peripheral wall 42 of the design panel 4 so that the outer peripheral wall 42 of the design panel 4 is not deformed by receiving the vertical deflection and elastic force.

  However, in reality, the leaf spring portion 113 does not cause vertical deflection and elastic force. For this reason, even if the vertical thickness of the outer peripheral wall 42 of the design panel 4 is reduced, the design panel 4 is not deformed in the vertical direction. Therefore, the vertical thickness of the outer peripheral wall 42 of the design panel 4 can be reduced, and the distance from the outer shape of the LCD 5 to the outer shape of the design panel 4 in the vertical direction (indicated by H in FIG. 5) can be reduced. The size of the entire electronic device when viewed from the front can be reduced while keeping the size of the LCD 5 as it is.

  Further, the leaf spring portion 113 of the shield member 11 bends in a direction approaching the wall 44. Since the bending direction and the assembly direction of the touch display unit 1 (direction A in FIG. 2) are the same, variations during assembly can be absorbed by the bending of the leaf spring portion 113.

  In the above description, the touch panel 3 is disposed in front of the design panel 4 and the IC 12 mounted on the FPC 10 connected to the touch panel 3 is protected from static electricity. However, in place of the touch panel 3, another electronic member is disposed in front of the design panel 4, and the electronic device having a configuration in which the FPC 10 is connected to the electronic member also includes the shield member 11 provided on the design panel 4 with static electricity. Functions as a countermeasure member. That is, the shield member 11 can protect the IC 12 on the FPC 10 connected to various electronic members arranged in front of the design panel 4 from static electricity.

In the above description, it is assumed that static electricity introduced to the shield member 11 is discharged through the LCD holder 6, the substrate holder 8, and the ground member of the main body 2. However, for example, it may be configured such that the ground is directly taken by the LCD holder 6 and discharged when static electricity flows into the LCD holder 6. In this case, it is not always necessary to electrically connect the LCD holder 6 and the substrate holder 8.
In the above description, the contact surface 114 of the shield member 11 is brought into contact with the LCD holder 6. However, other conductive members may be brought into contact with each other to discharge static electricity. That is, the conductive member that contacts the contact surface 114 may be connected directly or indirectly to the ground.

  As described above, according to the electronic apparatus according to Embodiment 1 of the present invention, the shield member 11 including the plate portion 111 that the FPC 10 straddles and the leaf spring portion 113 that contacts the LCD holder 6 is provided on the design panel 4. Provided. The static electricity generated outside the touch display unit 1 and entering the touch display unit 1 is guided to the shield member 11 and discharged to the ground through the LCD holder 6, so that the static electricity is transmitted through the FPC 10. And the IC 12 is not destroyed. Moreover, since the leaf | plate spring part 113 does not produce the bending and elastic force of an up-down direction, the thickness of the up-down direction of the outer peripheral wall 42 of the design panel 4 can be made thin. The shield member 11 itself is a compact member and does not increase the size of the electronic device. In addition, by reducing the thickness of the outer peripheral wall 42 in the vertical direction, the overall size of the electronic device when viewed from the front is reduced. it can.

  In addition, the plate portion 111 is fixed with its fixed surface in close contact with the inner peripheral surface 43 of the frame of the design panel 4. The rigidity of the thin outer peripheral wall 42 of the design panel 4 can be supplemented by fixing the plate portion 111 to the design panel 4 while being in close contact with the design panel 4. On the other hand, when the plate portion 111 is fixed to the design panel 4 by point contact such as fixing at two points by resin welding, the contact area is smaller than that of surface contact, so that the rigidity of the thin outer peripheral wall 42 is compensated. Is difficult.

  Further, the plate portion 111 is subjected to a drawing process that becomes convex toward the FPC 10 when it is arranged on the design panel 4. By forming the aperture 112 in the plate portion 111, the rigidity of the plate portion 111 can be improved and the rigidity of the thin outer peripheral wall 42 can be supplemented. Further, when the FPC 10 is in contact with the edge 116 of the plate portion 111 shown in FIG. 3, the FPC 10 may be scraped by the edge 116 due to vibration. Therefore, by making the diaphragm 112 convex toward the FPC 10, the FPC 10 is lifted upward by the diaphragm 112, thereby making it difficult for the FPC 10 to contact the edge 116.

  The member connected to the FPC 10 is the touch panel 3, and the member electrically connected to the ground is the LCD holder 6 that holds the LCD 5. Thereby, since a user's finger | toes approach frequently, the electronic device with the touch panel 3 which is easy to generate | occur | produce static electricity can be protected from static electricity.

  In the present invention, any constituent element of the embodiment can be modified or any constituent element of the embodiment can be omitted within the scope of the invention.

  DESCRIPTION OF SYMBOLS 1 Touch display part 2 Body part 3 Touch panel (electronic member) 4 Design panel (panel) 5 LCD (display member) 6 LCD holder (conductive member) 7 Substrate 8 Substrate holder 9 Shield monitor 10 FPC, 11 shield member, 12 IC, 41 opening, 42 outer peripheral wall, 43 inner peripheral surface, 44 wall, 45 notch, 46 positioning projection, 61 opening, 62 mounting hole, 63 nail, 64 support wall, 65 Notch, 81, 82 mounting hole, 83 claw, 111 plate part, 112 aperture, 113 leaf spring part, 114 contact surface, 115 positioning hole, 116 edge.

Claims (4)

An electronic member to which the flexible printed circuit board is connected;
A conductive member electrically connected to the ground;
A frame-like panel that holds the electronic member outside the electronic device, and holds the conductive member inside the electronic device;
A conductive shield provided on the panel and having a plate portion disposed at a position across the flexible printed circuit board from the electronic member toward the inside of the electronic device and a leaf spring portion extended from the plate portion With members,
The electronic device, wherein the leaf spring portion is interposed between the electronic member and the conductive member, and abuts on the conductive member with an elastic force directed from the electronic member side toward the conductive member.   The electronic device according to claim 1, wherein the plate portion is fixed with a fixed surface in close contact with an inner peripheral surface of the frame of the panel.   The electronic apparatus according to claim 1, wherein the plate portion is subjected to a drawing process that protrudes toward the flexible printed circuit board when the plate portion is disposed on the panel. The electronic member is a touch panel,
The electronic apparatus according to claim 1, wherein the conductive member is a holder that holds a display member.

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