Liquid crystal panel conductive connection structure in electronic apparatus

Abstract

To provide a liquid crystal panel conductive connection structure in an electronic apparatus, capable of viewing a conductive gasket even after an assembling of a substrate, and easily confirming missing of an attachment of the conductive gasket and a position deviation.SOLUTION: On a rear surface of a front case 2, a pair of left and right holding claws 13a and 13b as a gasket holding part that holds a conductive gasket 10, and an engagement claw 14 of which an upper end of the conductive gasket 10 nipped by the holding claws 13a and 13b can be contacted are provided. Then, the conductive gasket 10 is nipped from front and rear sides by a liquid crystal panel 11 and a main substrate 31 in a state where the conductive gasket 10 is held to each gasket holding part. Also, a window 32 is provided to the main substrate 31, and the conductive gasket nipped from the front and rear sides by the liquid crystal panel 11 and the main substrate 31 is exposed into the window 32.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a conductive connection structure for a liquid crystal panel in an electronic device such as an intercom master unit.

Background Art

[0002] Conventionally, some intercom master units, which are examples of electronic devices, are equipped with a liquid crystal panel for displaying images captured by an intercom slave unit. In such an intercom master unit, for the purpose of preventing noise on the liquid crystal screen, a liquid crystal panel conductive connection structure is provided in which the metal outer shell portion of the liquid crystal panel and the land portion of the substrate that controls the operation of the liquid crystal panel are electrically connected by a conductive member (for example, Patent Document 1).

[0003] In recent years, a conductive gasket may be employed as the conductive member. In such a liquid crystal panel conductive connection structure employing a conductive gasket, an insulating synthetic resin case body is installed between the liquid crystal panel and the substrate located behind it, a window is opened in the case body, the conductive gasket is positioned within the window, and then the substrate is assembled, thereby sandwiching and attaching the conductive gasket between the liquid crystal panel and the substrate from the front and rear.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in a conventional liquid crystal panel conductive connection structure that employs a conductive gasket as the conductive member, the conductive gasket sandwiched between the liquid crystal panel and the substrate is entirely covered by the substrate, so there is a problem that it is impossible to confirm whether the conductive gasket has been forgotten to be installed or has been displaced in position after the substrate is assembled.

[0006] Therefore, the present invention has been made in view of the above problems, and aims to provide a liquid crystal panel conductive connection structure in an electronic device that allows the conductive gasket to be visually recognized even after the substrate is assembled, and that can easily confirm whether the conductive gasket has been forgotten to be installed or has been displaced in position.

Means for Solving the Problems

[0007] In order to achieve the above object, the invention according to claim 1 of the present invention comprises a liquid crystal panel disposed in a main body case of an electronic device, a substrate disposed behind the liquid crystal panel in the main body case, and a conductive gasket sandwiched between the liquid crystal panel and the substrate from the front and rear, and electrically connects a metal outer shell portion provided on the rear surface of the liquid crystal panel and the substrate via the conductive gasket. A liquid crystal panel conductive connection structure in an electronic device, wherein a gasket holding portion for holding the conductive gasket is provided in the main body case, the gasket holding portion has a plate-like portion extending in the front-rear direction and a pair of sandwiching portions that sandwich the conductive gasket from the left and right, and above or below the sandwiching portions and at a position between the sandwiching portions, there is a plate-like portion extending in the front-rear direction, and a regulating portion capable of abutting against one end in the vertical direction of the conductive gasket sandwiched between the sandwiching portions. While the conductive gasket is sandwiched between the liquid crystal panel and the substrate in a state of being held by the gasket holding portion, an opening or a notch is provided in the substrate, and the sandwiched conductive gasket is exposed in the opening or the notch. The invention according to claim 2 is the invention according to claim 1, wherein the gasket holding portion is provided integrally with the main body case, while an insulating sheet is disposed so as to cover the rear surface of the liquid crystal panel, and the insulating sheet is provided with a notch or an opening for exposing at least a part of the metal outer portion, and the conductive gasket is in contact with the metal outer portion exposed in the notch or the opening in a state of being held by the gasket holding portion.

Effect of the Invention

[0008] According to the present invention, a gasket holding portion for holding a conductive gasket provided in a main body case has a plate-like portion extending in the front-rear direction and a pair of sandwiching portions for sandwiching the conductive gasket from the left and right, and above or below the sandwiching portions and at a position between the sandwiching portions, has a plate-like portion extending in the front-rear direction, and includes a regulating portion capable of abutting on one end in the vertical direction of the conductive gasket sandwiched between the sandwiching portions. Then, the conductive gasket is sandwiched from the front and rear by the liquid crystal panel and the substrate in a state of being held by the gasket holding portion. Further, an opening or a notch is provided in the substrate so that the sandwiched conductive gasket is exposed in the opening or the notch. Therefore, even after the substrate is assembled, the conductive gasket can be easily visually recognized, and it is possible to easily confirm the omission of attachment or the displacement of the position of the conductive gasket. Furthermore, since the conductive gasket is held by the gasket holding portion, it is difficult for the conductive gasket to be displaced during the assembly of the substrate or the like, and the assembly work of the electronic device can be simplified. Also, while the gasket holding portion is provided integrally with the main body case, an insulating sheet is disposed so as to cover the rear surface of the liquid crystal panel, and the insulating sheet is provided with a notch or an opening for exposing at least a part of the metal outer peripheral portion. The conductive gasket is brought into contact with the metal outer peripheral portion exposed in the notch or the opening while being held by the gasket holding portion. Therefore, it is not necessary to install a synthetic resin case body for positioning the conductive gasket as in the conventional case, and the main body case can be made thinner, and thus the electronic device can be made smaller.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0010] Hereinafter, the master intercom unit according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0011] FIG. 1 is a perspective explanatory view showing the front side of the master intercom unit 1 from the upper right obliquely. FIG. 2 is a perspective explanatory view showing the rear side of the master intercom unit 1 from the lower left obliquely. FIG. 3 is a perspective explanatory view showing the rear side of the master intercom unit 1 with the rear case 3 removed from the lower left obliquely. FIG. 4 is a perspective explanatory view showing a disassembled state of the main board 31, the insulating sheet 21, the conductive gasket 10, and the front case 2 side. FIG. 5 is a perspective explanatory view showing the front case 2 side of the master intercom unit 1. FIG. 6 is an explanatory view showing an enlarged view of the board latching portion of the front case 2. FIG. 7 is an explanatory view showing an enlarged view of the gasket holding portion of the front case 2. FIG. 8 is an explanatory view showing a state where the conductive gasket 10 is held in the gasket holding portion. FIG. 9 is an explanatory view showing an enlarged view of the location of the gasket holding portion after the main board 31 is assembled. FIG. 10(a) is an explanatory view showing a cross section taken along line A-A in FIG. 9, and FIG. 10(b) is an explanatory view showing a cross section taken along line B-B in FIG. 9.

[0012] The master intercom unit 1 has a main body case formed by assembling a front case 2 disposed on the front side and a rear case 3 assembled on the rear side of the front case 2. On the front surface of the main body case, there is provided a touch panel type display operation unit 4 having both a function as a display unit for displaying an image or the like captured by an intercom slave unit (not shown) and a function as an operation unit for operating during various settings. Further, on the right end of the front surface of the main body case, there is provided a response button 5 for responding to a call from the intercom slave unit. Furthermore, on the rear surface of the main body case, there is provided a speaker unit 6 for making a call with the intercom slave unit. And such a master intercom unit 1 is installed on a wall surface or the like in a living room, and displays an image on the display operation unit 4 in response to a call from the intercom slave unit, and enables a call with the intercom slave unit when the response button 5 is operated in response.

[0013] Here, the liquid crystal panel conductive connection structure, which is the main part of the present invention, will be described. Inside the main body case of the intercom master unit 1, a liquid crystal panel 11 that constitutes the display operation unit 4 is installed. Further, behind the liquid crystal panel 11, a main board 31 for controlling the main operations of the intercom master unit 1, that is, the display operation on the display operation unit 4, the call operation with the intercom slave unit, etc., is assembled. Furthermore, between the liquid crystal panel 11 and the main board 31, an insulating sheet 21 and a conductive gasket 10 for electrically connecting the metal outer shell portion of the liquid crystal panel 11 and the land portion (not shown) of the main board 31 are arranged. The conductive gasket 10 adopted in this embodiment is formed by winding a conductive member around a sponge base material and is formed in a rectangular block shape extending in the vertical direction.

[0014] Also, on the rear surface of the front case 2, a liquid crystal mounting portion 12 for mounting the liquid crystal panel 11 is provided. Further, adjacent to the upper side of the liquid crystal mounting portion 12, a gasket holding portion capable of holding the conductive gasket 10 is provided. The gasket holding portion includes a pair of left and right holding claws 13a, 13b and a locking claw 14 provided above the holding claws 13a, 13b, and the holding claws 13a, 13b and the locking claw 14 are integrally formed with the front case 2.

[0015] The left holding claw 13a as viewed from the front is a plate body in which the vertical direction is the width direction and the left - right direction is the thickness direction, and protrudes rearward from the rear surface of the front case 2. The tip of the holding claw 13a is located behind the liquid crystal panel 11 attached to the liquid crystal mounting portion 12. And a claw portion is provided at the tip so as to protrude inward (here, to the right) in the left - right direction.

[0016] Also, the holding claw 13b on the right side when viewed from the front is a plate body in which the vertical direction is the width direction and the left - right direction is the thickness direction, similar to the holding claw 13a. It protrudes rearward from the rear surface of the front case 2 at a position separated from the left - hand holding claw 13a by a distance approximately equal to the left - right width of the conductive gasket 10 to the right. The tip of the holding claw 13b is located behind the liquid crystal panel 11 attached to the liquid crystal mounting portion 12. And a claw portion is provided at the tip so as to protrude inward (here, to the left) in the left - right direction.

[0017] Furthermore, the locking claw 14 is a plate body in which the left - right direction is the width direction and the vertical direction is the thickness direction. It protrudes rearward from the rear surface of the front case 2 above the holding claws 13a and 13b and at a position between the left - and right - hand holding claws 13a and 13b. The tip of the locking claw 14 is located behind the liquid crystal panel 11 attached to the liquid crystal mounting portion 12. And a claw portion is provided at the tip so as to protrude downward.

[0018] On the other hand, a substrate latching portion is provided below the liquid crystal mounting portion 12 on the rear surface of the front case 2, where the lower edge of the main board 31 is latched when the main board 31 is assembled to the front case 2. The substrate latching portion includes contact ribs 15, 15 that contact the front surface of the main board 31 and a latching claw 16 that contacts the rear surface of the main board 31. Note that contact ribs 17, 17... that contact the front surface of the main board 31 are provided above the liquid crystal mounting portion 12 at the upper edge side of the main board 31.

[0019] Further, the insulating sheet 21 is arranged to cover the rear surface of the liquid crystal panel 11, so as to prevent noise from the liquid crystal panel 11 from affecting the main board 31. The insulating sheet 21 is a sheet body formed in substantially the same shape as the liquid crystal panel 11. However, a notch 22 is provided at the upper edge of the insulating sheet 21 to expose a portion of the rear surface of the liquid crystal panel 11, that is, a portion below the holding claws 13a and 13b in the metal outer frame of the liquid crystal panel 11. Further, a window 32 into which the holding claws 13a and 13b can enter is formed in the upper portion of the main board 31 when it is attached to the front case 2. And a land portion electrically connected to the ground of the electronic circuit of the main board 31 is provided at a position below the window 32 on the front surface of the main board 31. On the other hand, a portion above the window 32 on the rear surface of the main board 31 functions as a locked portion where the locking claw 14 locks when attached to the front case 2.

[0020] Then, the liquid crystal panel 11, the conductive gasket 10, the insulating sheet 21, and the main board 31 are attached to the front case 2 as follows, and thus the liquid crystal panel conductive connection structure is assembled. First, the liquid crystal panel 11 is attached to the liquid crystal attachment portion 12. Next, the insulating sheet 21 is disposed on the rear side of the liquid crystal panel 11 to cover the metal outer frame portion of the liquid crystal panel 11 with the insulating sheet 21. Further, the conductive gasket 10 is inserted downward between the holding claws 13a and 13b until the upper end thereof abuts against the lower surface of the locking claw 14, and the conductive gasket 10 is held by the gasket holding portion. In this held state, as shown in FIG. 8, the lower portion of the conductive gasket 10 protrudes onto the surface of the liquid crystal panel 11 and is located within the notch 22, and the front surface of the conductive gasket 10 is in contact with the metal outer frame portion of the liquid crystal panel 11. Finally, while hanging the lower edge of the main board 31 on the board hanging portion, the upper edge side of the main board 31 is tilted toward the liquid crystal panel 11 side, and the locking claw 14 is locked above the window 32. Then, the main board 31 is assembled to the front case 2 in a state where the lower edge side is sandwiched from the front and rear by the contact ribs 15, 15 and the hanging claws 16, and the upper edge side is sandwiched from the front and rear by the contact ribs 17, 17... and the locking claw 14, and thus the liquid crystal panel conductive connection structure is assembled.

[0021] In the assembled state as described above, the conductive gasket 10 remains held by the gasket holding portion, with its front surface abutting against the metal outer peripheral portion of the liquid crystal panel 11 and its rear surface abutting against the land portion of the main substrate 31, and is sandwiched between the liquid crystal panel 11 and the main substrate 31 from the front and rear. Further, when the conductive gasket 10 is crushed as the main substrate 31 is attached, although a load is applied to the conductive gasket 10 to push it upward, the locking claw 14 restricts the upward movement of the conductive gasket 10, and the conductive gasket 10 does not shift from the appropriate position. Furthermore, as the main substrate 31 is attached, the holding claws 13a and 13b penetrate through the window 32 and project rearward from the main substrate 31. When viewed from the rear side of the main substrate 31, the conductive gasket 10 is exposed between the holding claws 13a and 13b within the window 32.

[0022] According to the liquid crystal panel conductive connection structure in the intercom master unit 1 having the above configuration, a gasket holding portion is provided on the rear surface of the front case 2, which has a plate-like portion extending in the front-rear direction and sandwiches the conductive gasket from the left and right with a pair of holding claws 13a and 13b, and a locking claw 14 that extends in the front-rear direction above the holding claws 13a and 13b and at a position between the holding claws 13a and 13b, and against which the upper end of the conductive gasket 10 sandwiched by the holding claws 13a and 13b can abut. Then, the conductive gasket 10 is sandwiched between the liquid crystal panel 11 and the main substrate 31 while being held by the gasket holding portion. Further, a window 32 is provided in the main substrate 31, and the conductive gasket 10 sandwiched between the liquid crystal panel 11 and the main substrate 31 is exposed within the window 32. Therefore, even after the main substrate 31 is assembled, the conductive gasket 10 can be easily visually recognized, and it is possible to easily confirm whether the conductive gasket 10 has been forgotten to be attached or has shifted in position. Furthermore, since the conductive gasket 10 is held by the gasket holding portion, it is difficult for the conductive gasket 10 to shift during the assembly of the main substrate 31 or the like, and the assembly work of the intercom master unit 1 can be simplified.

[0023] Also, while the holding claws 13a and 13b and the locking claw 14 are provided integrally with the main body case, an insulating sheet 21 is disposed so as to cover the rear surface of the liquid crystal panel 11, and a notch 22 for partially exposing the metal outer peripheral portion of the liquid crystal panel 11 is provided in the insulating sheet 21. The conductive gasket 10 is made to contact the metal outer peripheral portion exposed in the notch 22 while being held by the gasket holding portion. Therefore, there is no need to install a synthetic resin case body for positioning the conductive gasket 10 as in the prior art, and the main body case can be made thinner, and thus the intercom master unit 1 can be made smaller. Furthermore, the locking claw 14 constituting the gasket holding portion is configured to lock to the rear surface of the main board 31. That is, since the locking claw 14 also functions as a component related to the assembly of the main board 31, the configuration is rationalized, and further miniaturization of the intercom master unit 1 can be achieved.

[0024] Note that the liquid crystal panel conductive connection structure in the electronic device according to the present invention is not limited to the aspects of the above embodiment. Of course, the overall configuration of the electronic device, as well as the configuration related to the gasket holding portion in the liquid crystal panel conductive connection structure, can be appropriately changed as needed without departing from the spirit of the present invention.

[0025] For example, in the above embodiment, since the liquid crystal panel and the board may be assembled to the front case, the configuration related to the gasket holding portion such as the sandwiching portion and the restricting portion is provided in the front case. However, in the case where the liquid crystal panel and the board are assembled to the rear case, the configuration related to the gasket holding portion may be provided in the rear case, and the location where the gasket holding portion is provided can be appropriately changed in design.

[0026] In addition, in the above-described embodiment, since the gasket holding portion is provided above the liquid crystal panel, the restricting portion is provided above the sandwiching portion. However, when the gasket holding portion is provided below the liquid crystal panel, it is naturally possible to provide the restricting portion below the sandwiching portion, and the positional relationship between the sandwiching portion and the restricting portion can also be appropriately changed in design.

[0027] Furthermore, in the above-described embodiment, an opening is provided in the substrate as a component for exposing the sandwiched conductive gasket. However, there is no problem even if a notch is provided instead of the opening. Similarly, a notch is provided in the insulating sheet as a component for exposing the metal outer peripheral portion of the liquid crystal panel. However, there is no problem even if an opening is provided instead of the notch.

[0028] Furthermore, in the above-described embodiment, the restricting portion is formed as a locking claw that functions as a component related to the assembly of the substrate. However, it is naturally possible to configure the restricting portion as just a tongue piece. Moreover, in the above-described embodiment, an insulating sheet is disposed between the liquid crystal panel and the substrate. However, there is no problem even if a synthetic resin case body is disposed in the same manner as in the prior art, and a gasket holding portion may be provided in such a case body.

[0029] In addition, in the above-described embodiment, the master unit of an interphone, which is an example of an electronic device, is described. However, the liquid crystal panel conductive connection structure according to the present invention can be suitably adopted as the liquid crystal panel conductive connection structure in an electronic device other than the master unit of an interphone as long as the liquid crystal panel and the substrate are arranged front and back.

Explanation of Reference Numerals

[0030] 1 ··· Master unit of interphone (electronic device), 2 ··· Front case (main body case), 3 ··· Rear case (main body case), 10 ··· Conductive gasket, 11 ··· Liquid crystal panel, 13a, 13b ··· Holding claws (sandwiching portions), 14 ··· Locking claws (restricting portions), 15, 17 ··· Contact ribs, 16 ··· Hooking claws, 21 ··· Insulating sheet, 22 ··· Notch, 31 ··· Main substrate (substrate), 32 ··· Window (opening).

Claims

1. A liquid crystal panel disposed within a main body case of an electronic device, a substrate disposed behind the liquid crystal panel within the main body case, and a conductive gasket sandwiched between the liquid crystal panel and the substrate from the front and rear, and a liquid crystal panel conductive connection structure in an electronic device that electrically connects a metal outer portion provided on the rear surface of the liquid crystal panel and the substrate via the conductive gasket, a gasket holding portion for holding the conductive gasket is provided within the main body case, the gasket holding portion has a plate-shaped portion extending in the front-rear direction and a pair of sandwiching portions that sandwich the conductive gasket from the left and right, and above or below the sandwiching portions and at a position between the sandwiching portions, has a plate-shaped portion extending in the front-rear direction, and includes a restricting portion against which one end of the conductive gasket sandwiched by the sandwiching portions can abut in the vertical direction, while the conductive gasket is sandwiched between the liquid crystal panel and the substrate while being held by the gasket holding portion, an opening or notch is provided in the substrate, A liquid crystal panel conductive connection structure in an electronic device, characterized in that the sandwiched conductive gasket is exposed within the opening or the notch.

2. while the gasket holding portion is provided integrally with the main body case, an insulating sheet is disposed so as to cover the rear surface of the liquid crystal panel, and a notch or opening for exposing at least a part of the metal outer portion is provided in the insulating sheet, The liquid crystal panel conductive connection structure in the electronic device according to claim 1, characterized in that the conductive gasket abuts against the metal outer portion exposed within the notch or the opening while being held by the gasket holding portion.

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