JP6106409B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device such as a TFT-LCD (Thin Film Transistor Liquid Crystal Display), and in particular, to improve the assembling property (reducing the assembling time) when fixing a liquid crystal display module with a bezel to a circuit board. The present invention relates to a liquid crystal display device.

<Liquid Crystal Display Device Targeted by the Present Invention>
In a liquid crystal display device to which the present invention is applied, the periphery of a liquid crystal display module comprising a display panel using a liquid crystal display element is enclosed by a bezel comprising a frame-like conductive frame frame, and this is accommodated in a case. A circuit board is fixed to the circuit board, and an FPC (flexible printed wiring board) attached to the liquid crystal display module is connected to a circuit pattern provided on the circuit board by a connector so that the circuit board of the liquid crystal display module is connected to the circuit board. The installation is completed and the liquid crystal display device is completed.

<Countermeasures against static electricity in liquid crystal display devices>
The liquid crystal display device is effective for low power consumption, overall downsizing and thinning, and the display unit including the circuit board is disposed in the housing space of the synthetic resin case. Static electricity is generated in the holder.
Therefore, a high voltage due to the charging may be discharged to a conductive pattern or the like of the circuit board, and a gate of an electronic component such as a MOS IC may be destroyed.
Therefore, a bezel made of a metal conductive material is covered from the front side of the liquid crystal display panel, the periphery is shielded, and a long energizing arm piece is provided on the bezel, and this energizing arm piece is attached to the circuit board. By connecting to the ground pattern, the bezel is not charged and the static electricity problem is solved (see Patent Document 1).

<Assembly of a conventional LCD module on a circuit board>
6 to 9 are perspective views for explaining the assembly order of a conventional liquid crystal display module such as the invention described in Patent Document 1 to a circuit board.
FIG. 6A is a perspective view showing a liquid crystal display module, a case, and a circuit board before assembly, and FIG. 6B is a perspective view seen from the direction of arrow X in FIG.
In FIGS. 6A and 6B, 100 is a housing, 200 is a circuit board, 300 is a liquid crystal display module, and 400 is a bezel. Next, the housing 100, the circuit board 200, the liquid crystal display module 300, and the bezel 400 will be briefly described.

<Case 100>
The casing 100 is made of a synthetic resin formed in a square frame shape, and includes a peripheral wall 100W standing upright in a rectangular shape in plan view and a frame portion 100G that surrounds a peripheral edge on the upper end side of the peripheral wall 100W. Locking claws 100K are respectively provided at a plurality of locations (four corners in the figure) inside 100W, and further, shield piece through-holes 100S and FPC insertion holes 100F penetrating in the vertical direction are formed inside the housing 100. .

《Locking claw 100K》
The locking claw 100K is a key-shaped claw formed at the tip of an arm that is cantilevered at the bottom and extends upward as a free end. The locking claw 100K engages with the inclined protrusion 400K provided on the side surface of the bezel 400 when assembled. That is, when the liquid crystal display module 300 is inserted into the housing 100, the locking claw 100 </ b> K is initially provided with the inclined protrusion 400 </ b> K provided on the side surface of the bezel 400 on the liquid crystal display module 300 side. The locking claw 100K has a slanted protrusion 400K while the cantilevered arm is bent by the elastic force of the resin itself. The arm that is cantilevered returns to its original shape at the moment when the locking claw 100K climbs up the slope of the inclined protrusion 400K, and the locking claw 100K is locked to the inclined protrusion 400K. Accordingly, the housing 100 and the liquid crystal display module 300 cannot be detached (temporarily fixed) with a slight external force such as turning the housing 100 upside down.

<< Shield piece through hole 100S >>
The shield piece through-hole 100S penetrates the casing 100 in the vertical direction of the casing. When the liquid crystal display module 300 with the bezel 400 is inserted into the housing 100, the terminal 400T at the tip of the shield piece 400S extending to the bezel 400 is inserted into the shield piece through hole 100S (FIG. 7 (3)). )reference).

<< FPC insertion hole 100F >>
The FPC insertion hole 100 </ b> F is an elongated hole that penetrates the casing 100 in the vertical direction inside the casing 100. When the liquid crystal display module 300 is inserted into the housing 100, the tip of the flexible printed wiring board 300F connected to the liquid crystal display module 300 is inserted.

<Circuit board 200>
The circuit board 200 is formed of, for example, a hard substrate made of a glass epoxy material, and a plurality of circuit patterns for supplying drive signals to the liquid crystal display module 300 are provided on the front surface side or the back surface side. Although not shown, circuit components are mounted.
A plurality of electrode ends drawn out from the circuit board 200 are electrically connected to the connector 200 </ b> C mounted on the circuit board 200. The flexible printed wiring board 300F is connected to the connector 200C (FIG. 8 (5)) (FIG. 8 (6)), and is electrically connected to each electrode terminal of the liquid crystal display module 300.
A ground pattern for discharging static electricity is formed around the back side of the circuit board 200, and a screw hole 200N (FIG. 8 (5)) is formed therein. The screw hole 400N at the tip of the shield piece 400S is screwed in a state where the screw hole 200N of the circuit board 200 overlaps, so that the bezel 400 and the circuit board 200 have the same potential (ground potential) via the shield piece 400S. This eliminates the risk of discharge.
In addition, a shield piece through hole 200S and an FPC insertion hole 200F that penetrate the circuit board 200 in the thickness direction are formed.

<Liquid crystal display module 300>
The liquid crystal display module 300 includes, for example, a liquid crystal display element in which liquid crystal molecules are sealed between a pair of glass substrates, and a plurality of electrode terminals (not shown) that are electrically connected to the flexible printed wiring board 300F are provided at the ends thereof. ing.

<< Flexible printed wiring board 300F >>
The flexible printed wiring board 300F is obtained by forming a desired conductive circuit pattern on a resin film made of synthetic resin, and an electrode terminal provided on the liquid crystal display module 300 and a circuit pattern provided on the circuit board 200 via a connector. Thus, a drive signal is supplied to the liquid crystal display module 300 through the circuit board 200 to cause the liquid crystal display module 300 to perform a predetermined display.

<Bezel 400>
The bezel 400 is a frame-shaped metal frame that covers the periphery of the front side of the liquid crystal display module 300. By covering the front side periphery of the liquid crystal display module 300 with the bezel 400, the front side periphery of the liquid crystal display module 300 is electrostatically shielded, and damage to the driving IC or the like due to static electricity is prevented. From the side surface of the bezel 400, the shield piece 400S extends integrally with the bezel 400 downward, and inclined projections 400K are also formed at a plurality of locations on the side surface of the bezel 400.

<< Shield piece 400S >>
The shield piece 400S is a long metal piece, and its tip is connected to a ground line (ground pattern) formed of a conductive pattern formed on the circuit board 200. When an electrical connection is formed from the electrode portion of the liquid crystal display module 300 to the electrical connector on the circuit board 200 side via the flexible printed wiring board 300F, the wiring path from the bezel 400 to the flexible printed wiring board 300F is conventionally used. Static electricity is discharged to the copper foil portion of the conductive pattern, and this discharge causes a high voltage to be applied to the driving IC and the like through the conductive pattern of the circuit board 200, so that they are destroyed, but the shield piece 400S causes the bezel 400 to be destroyed. And the ground line of the circuit board 200 are at the same potential (earth potential), such discharge does not occur.
The shield piece 400S is a long thin metal plate, and a terminal 400T is formed at the tip thereof, and a screw hole 400N is formed in the center of the terminal 400T (FIG. 6 (2)). The terminal 400T at the tip of the shield piece 400S is inserted into the shield piece through hole 100S penetrating in the vertical direction of the casing inside the casing 100 (FIG. 7 (3)), and further, the through hole 200S of the circuit board 200. (FIG. 8 (5)) and then bent over the screw hole 200N of the circuit board 200 (FIG. 9 (7)), the screw hole 400N at the tip of the shield piece 400S and the screw hole 200N of the circuit board 200. Are overlapped and screwed with a screw N so that both are electrically connected and mechanically fixed (FIG. 9 (8)). This screwing causes the bezel 400 and the circuit board 200 to have the same potential (ground potential) via the shield piece 400S, thereby eliminating the risk of discharge.

<< Inclined protrusion 400K >>
The inclined protrusion 400 </ b> K is a slope whose height increases as it goes from the bottom to the top of the bezel 400. Therefore, the inclined protrusions 400K are provided at a plurality of locations inside the housing 100 in a state where the tip of the shield piece 400S is completely inserted into the shield piece through hole 100S of the housing 100 (FIG. 7 (3)). Each locking claw 100K is engaged and temporarily fixed. Thereby, even if the screw hole 400N of the shield piece 400S and the screw hole 200N of the circuit board 200 are not yet screwed with the screw N, the case 100 and the liquid crystal display module 300 can be connected even if the case 100 is turned over. It will not come off.

<Assembly of conventional LCD module>
Next, assembly of these four components (the casing 100, the circuit board 200, the liquid crystal display module 300, and the bezel 400) will be described in order with reference to the eight drawings of FIGS. 6 (1) to 9 (8). .
In FIG. 6A, the liquid crystal display module 300 with the bezel 400 is carried directly above the housing 100, and the flexible printed wiring board 300F has an FPC insertion hole 100F in the housing 100 and an FPC insertion hole in the circuit board 200 directly below the FPC insertion hole 100F. Position it so that it is directly above 200F, and lower it as it is.
6B, the liquid crystal display module 300 is lowered onto the housing 100, and the flexible printed wiring board 300F is inserted into the FPC insertion hole 100F of the housing 100 and the FPC insertion hole 200F of the circuit board 200 below the flexible printed wiring board 300F. And shows a state of penetration. At this time, the shield piece 400S is directly above the shield piece through hole 100S, but has not yet penetrated.
FIG. 7 (3) is a top view (looking up) of the state in which the liquid crystal display module 300 is fitted in the housing 100. The circuit board 200 is not shown here in order to illustrate the fitting state between the liquid crystal display module 300 and the housing 100. The flexible printed wiring board 300F passes through the FPC insertion hole 100F of the housing 100, and the shield piece 400S also passes through the shield piece through hole 100S of the housing 100.
FIG. 7 (4) is a perspective view of the liquid crystal display module 300 of FIG. 7 (3) as viewed from the front side. An inclined protrusion 400K provided on the bezel 400 and a locking claw 100K at the tip of a cantilevered arm in the housing 100 are locked (temporarily fixed).
FIG. 8 (5) is a top view of the state in which the circuit board 200 is attached to the housing 100 of FIG. 7 (3). Reference numeral 200C denotes a connector for a flexible printed wiring board provided on the circuit board 200. The flexible printed wiring board 300 </ b> F passes through the FPC insertion hole 200 </ b> F of the circuit board 200 and is exposed from the circuit board 200.
In FIG. 8 (6), the end conductor portion of the flexible printed wiring board 300F is connected to the flexible printed wiring board connector 200C. As a result, the electrode terminals provided on the liquid crystal display module 300 and the circuit pattern provided on the circuit board 200 are electrically connected, and a drive signal is supplied to the liquid crystal display module 300 through the circuit board 200. A predetermined display can be performed. The terminal 400T at the tip of the shield piece 400S is still penetrated at this time.
9 (7), the terminal 400T at the tip of the shield piece 400S is bent over the screw hole 200N so that the screw hole 400N of the terminal 400T and the screw hole 200N of the circuit board 200 overlap each other. The screw hole 200N of the circuit board 200 is electrically connected to a ground pattern for discharging static electricity.
9 (8), the screw N is screwed into the screw hole 400N of the terminal 400T of the shield piece 400S so that the shield piece 400S and the circuit board 200 are fixed (fixed) and a ground pattern for discharging static electricity. Since the shield piece 400S is in an electrically connected state, the bezel 40 and the circuit board 20 are at the same potential (ground potential) via the shield piece 400S, and the risk of discharge is eliminated.

JP 2010-271381 A

As described above, the electrical connection in FIGS. 8 (5) and 8 (6) and the screw fixing for the main fixing in FIGS. 9 (7) and 9 (8) are performed on the back surface of the circuit board 200. Therefore, after the display unit is temporarily assembled (FIG. 7 (4)), the housing 100 is turned over, screwed and electrically connected to the FPC from the back, and a cover that covers the circuit board 200 is assembled. There was a need.
Therefore, it takes extra time to assemble and requires a jig to receive the housing in an inverted state. By turning it over, the kind of dust that comes inside the housing comes out on the surface. It was one of the causes of defects.
SUMMARY OF THE INVENTION The present invention has been made to solve such drawbacks, and an object of the present invention is to provide a liquid crystal display device capable of reducing the assembly time and preventing dust contained in the housing from appearing on the surface. Yes.

In order to solve the above problems, the liquid crystal display devices (1) to (3) of the present invention are characterized by the following.
(1) a casing, a circuit board assembled in the casing, a liquid crystal display module that is assembled to the circuit board and includes a shield piece through-fixing flange, and a liquid crystal display module that is assembled to the liquid crystal display module. In a liquid crystal display device comprising a provided bezel,
The shield piece through-fixing flange extends horizontally from a plurality of locations on the side wall of the liquid crystal display module, and includes a shield piece through hole.
The bezel has a side wall covering the entire circumference of the side wall of the liquid crystal display module,
The shield pieces are respectively extended from a plurality of locations corresponding to the shield piece penetration fixing flanges on the side wall of the bezel,
The shield piece is composed of a terminal connected to the bent portion and the bent portion leading to said vertical portion and a vertical portion which extends downwardly from the side wall of the bezel,
The vertical portion extends to the shield piece through hole,
The bent portion is bent at the shield piece through-hole,
The terminal is overlapped under the shield piece through-fixing flange, and only by overlapping the terminal under the shield piece through-fixing flange, the bezel is non-detachably locked from the liquid crystal display module,
The shield piece penetration fixing flange, the terminal of the shield piece, and the circuit board are fastened together with the casing.
(2) In the liquid crystal display device (1), the shield piece includes a horizontal portion extending horizontally from the side wall between the side wall and the vertical portion of the bezel.
(3) In the liquid crystal display device (2), that the side wall of the bezel, provided with two slits across the width of the horizontal portion at the base of the horizontal portion of the shield piece.

According to the above (1), there is no need to turn the casing over when bending the terminal at the tip of the shield piece or connecting the end of the flexible printed wiring board to the flexible printed wiring board connector. Since the jig is turned upside down, no jig is required, and no time is required for setting the jig, saving time and greatly reducing costs.
In addition, since the casing is not turned over, there is no dust defect caused by turning it over.
Further, since the shield piece of the bezel is sandwiched via the shield piece through-fixing flange of the liquid crystal display module, the plating layer on the terminal surface can be prevented from being damaged, and the connection reliability is improved.
Also, by previously assembling the bezel to the liquid crystal display module and bending the terminals, it is not necessary to provide a conventional temporary locking structure for temporarily fixing the liquid crystal display module and the bezel.
According to the above (2), the range in which the terminal at the tip of the shield piece can move in the front-rear and up-down directions is widened by the horizontal portion, and large variations in parts can be absorbed.
According to the above (3), since the slit is further added, the range in which the terminal at the tip of the shield piece can move in the front-rear and up-down directions becomes wider, and large variations in parts can be absorbed.

FIG. 1 is an exploded perspective view of a liquid crystal display device according to Embodiment 1 of the present invention. FIG. 2A is a perspective view of a state in which the bezel of the present invention is inserted into a liquid crystal display module, and FIG. 2B is a perspective view of a state in which a terminal of a shield piece is bent. FIG. 3 (3) is a perspective view of a state in which the circuit board is inserted into the positioning pin, and FIG. 3 (4) is a perspective view of a state in which the FPC is connected to the connector. FIG. 4 (5) is a perspective view of a state in which three members are fastened and fixed together with screws. FIGS. 5A and 5B are diagrams for explaining Embodiment 2 of the present invention. FIG. 5A is a longitudinal sectional view, and FIG. 5B is an enlarged perspective view of a shield piece. FIG. 6A is a perspective view showing a liquid crystal display module, a case, and a circuit board before assembly, and FIG. 6B is a perspective view of a conventional example viewed from the direction of arrow X in FIG. FIG. 7 (3) is a top view of the state in which the liquid crystal display module is fitted in the housing, and FIG. 7 (4) is a perspective view of the conventional example when the liquid crystal display module of FIG. 7 (3) is viewed from the front side. FIG. 8 (5) is a top view of the conventional example with the circuit board attached to the housing of FIG. 7 (3), and FIG. 8 (6) is for the flexible printed wiring board of FIG. 8 (5). It is a top view of the prior art example of the state which connected the edge part conductor part of the flexible printed wiring board to the connector. FIG. 9 (7) is a top view of the conventional example in a state in which the terminal at the tip of the shield piece is bent, and FIG. 9 (8) is a diagram showing that the shield piece and the circuit board are screwed into the terminal of the shield piece. It is a top view of the prior art example of the state which fixed this.

<Liquid Crystal Display Device According to Embodiment 1 of the Present Invention>
FIG. 1 is an exploded perspective view of a liquid crystal display device according to Embodiment 1 of the present invention. In FIG. 1, 10 is a housing, 20 is a circuit board, 30 is a liquid crystal display module, and 40 is a bezel. The housing 10, the circuit board 20, the liquid crystal display module 30, and the bezel 40 will be briefly described.

<Case 10>
The housing 10 is a rectangular-bottomed box made of synthetic resin and made up of four peripheral walls 10W and a bottom 10B. On the bottom 10B, shield piece fixing bosses 11 (two places), liquid crystal display module positioning pin receiving bosses 12 (two places), and positioning pin mounting bosses 13 (two places) are erected.

《Shield piece fixing boss 11》
The shield piece fixing boss 11 is provided according to the present invention, and the shield piece penetration fixing flange 30S of the liquid crystal display module 30 and the shield piece 40S of the bezel 40 are overlapped and fastened together with screws N.

<< Positioning Pin Housing Boss 12 for Liquid Crystal Display Module >>
The positioning pin accommodating boss 12 for the liquid crystal display module accommodates the tip after the positioning pin 30P of the liquid crystal display module 30 penetrates the positioning hole 22 for the liquid crystal display module of the circuit board 20.

<< Positioning pin mounting boss 13 >>
On the positioning pin mounting boss 13, a positioning pin 13P is erected.
When the circuit board 20 is placed on the shield piece fixing boss 11, the liquid crystal display module positioning pin accommodating boss 12, and the positioning pin mounting boss 13, the positioning pin 13P at the tip of the positioning pin mounting boss 13 is connected to the circuit. The housing 10 and the circuit board 20 are positioned through the housing positioning hole 23 in the substrate 20.

<Circuit board 20>
The circuit board 20 is formed of, for example, a hard board made of a glass epoxy material, and a plurality of circuit patterns for supplying a driving signal to the liquid crystal display module 30 are arranged on the front surface of the circuit board 20 or A circuit component is mounted on the back surface of the circuit pattern (not shown). The plurality of electrode terminals drawn out from the circuit board 20 and the connector 20F mounted on the circuit board 20 are electrically connected. By connecting the flexible printed wiring board 30F of the liquid crystal display module 30 to the connector 20F, the respective electrode terminals of the circuit board 20 and the respective electrode terminals of the liquid crystal display module 30 are electrically connected.
In addition, a ground pattern (not shown) for discharging static electricity is formed on the front (front) surface of the circuit board 20 on the back side of the circuit board 20, and a screw screw is passed through the ground pattern. A hole 21 is formed. Therefore, the terminal 30T of the liquid crystal display module 30, the terminal 40T at the tip of the shield piece 40S, and the ground pattern of the circuit board 20 are screwed in a sandwich state, so that the bezel 40 and the liquid crystal display are connected via the shield piece 40S. The module 30 and the circuit board 20 are at the same potential (ground potential), and the risk of discharge is eliminated.
The circuit board 20 has a positioning hole 22 (two locations) for a liquid crystal display module, a positioning pin, in addition to a fastening screw through-hole 21 (two locations) that penetrates a fastening screw N that fixes the shield piece 40S. Housing positioning holes 23 (two places) through which the positioning pins 13P at the tip of the mounting boss 13 pass are respectively opened.

<Liquid crystal display module 30>
The liquid crystal display module 30 is composed of, for example, a liquid crystal display element 30B in which liquid crystal molecules are sealed between a pair of glass substrates, and a plurality of electrode terminals (not shown) are provided at the ends thereof. It is electrically connected to one end of the flexible printed wiring board 30F described in FIG.
In the liquid crystal display module 30, shield-piece penetration fixing flanges 30 </ b> S extend in the horizontal direction from a plurality of locations (two locations in the drawing) of the side wall 30 </ b> W. Further, a positioning pin flange 30K extends in a horizontal direction from a plurality of locations (two locations in the figure) of the side wall 30W of the liquid crystal display module 30.

<< Flexible printed wiring board 30F >>
The flexible printed wiring board 30F is obtained by forming a desired conductive circuit pattern on a synthetic resin resin film. One end is electrically connected to a plurality of electrode terminals provided on the liquid crystal display module 30, and the other end is electrically connected to a connector 20 </ b> F provided on the circuit board 20. As a result, a drive signal is supplied to the liquid crystal display module 30 through the circuit board 20, and a desired display is performed on the liquid crystal display module 30.

《Shielding piece through fixing flange 30S》
The shield piece penetration fixing flange 30 </ b> S is provided according to the present invention and extends in the horizontal direction from the side wall 30 </ b> W of the liquid crystal display module 30. The shield piece through-fixing flange 30S has a shield piece through hole 30V on the side wall 30W side and a bezel fixing screw hole 30N on the tip side.
It is one of the features of the present invention that the shield piece through hole 30V is provided in the shield piece through fixing flange 30S. As a result, after the shield piece 20S, which will be described later, is passed through the shield piece through hole 30V, the liquid crystal display module 30 and the bezel 40 are simply fixed without requiring a complicated structure simply by bending the tip of the shield piece 20S. can do.

<< Flange for positioning pin 30K >>
The positioning pin flange 30K extending in the horizontal direction from the side wall 30W of the liquid crystal display module 30 is provided with positioning pins 30P to be inserted into the positioning holes 22 of the circuit board 20 downward.

<Bezel 40>
The bezel 40 is a frame-shaped metal frame that covers the periphery of the front side of the liquid crystal display module 30.
By covering the front side periphery of the liquid crystal display module 30 with the bezel 40, the front side periphery of the liquid crystal display module 30 is electrostatically shielded, and damage to the driving IC and the like due to static electricity is prevented.
From the side wall 40W of the bezel 40, a shield piece 40S according to the present invention extends downward.

<< Shield piece 40S >>
The shield piece 40S according to the present invention is a straight metal long piece, and includes a vertical portion 40V, a bent portion 40B, and a terminal 40T at the tip from the side wall 40W side. In order to make the bent portion 40B easier to bend, the bending resistance is reduced by punching out the central portion. The terminal 40T has a screw hole 40N in the center. FIG. 1 is an exploded perspective view of the completed liquid crystal display device, so that the shield piece 40S is already drawn in a bent state, but a straight long piece (see FIG. 1) before assembly. ).
When the bezel 40 is assembled to the liquid crystal display module 30, the straight long shield piece 40S penetrates through the shield piece through hole 30V of the shield piece penetration fixing flange 30S of the liquid crystal display module 30, and further extends downward. It becomes. Therefore, the bent portion 40B is bent after the penetration, so that the liquid crystal display module 30 and the bezel 40 are not separated from each other without a special temporary locking structure.
In this state, the terminal 40T at the tip of the shield piece 40S of the bezel 40 overlaps under the terminal 30T of the shield piece through-fixing flange 30S, and the screw hole 40N of the terminal 40T is positioned under the bezel fixing screw hole 30N. It has become.

Above, description of each component which comprises a liquid crystal display device is finished, and these assembly | attachment is demonstrated using FIGS. 2-4 next. In the following description, it will be understood how the liquid crystal display device of the present invention can reduce the assembly time and prevent dust contained in the housing from appearing on the surface.
2 (1) is a perspective view of a state in which the bezel 40 of the present invention is inserted into the liquid crystal display module 30, FIG. 2 (2) is a perspective view of a state in which the terminal 40T of the shield piece 40S is bent, and FIG. FIG. 3 (4) is a perspective view of a state in which an FPC is connected to a connector, and FIG. 4 (5) is a perspective view of a state in which three members are fastened together with screws. It is.

<Step 1. Insert the bezel 40 into the liquid crystal display module 30 (FIG. 2 (1))>:
The bent portion 40B at the tip of the shield piece 40S of the bezel 40 and the terminal 40T are passed through the shield piece through hole 30V of the shield piece through fixing flange 30S of the lower liquid crystal display module 30, and the bent portion 40B is formed in the shield piece through hole 30V. Has reached the surface. The terminal 40T at the tip of the shield piece 40S is still straight down.

<Step 2. Bending the shield piece 40S (FIG. 2 (2))>:
When the bezel 40 is completely inserted into the liquid crystal display module 30, when the terminal 40T at the tip of the shield piece 40S is bent horizontally in the direction toward the device, the terminal 40T of the shield piece 40S passes through the shield piece of the liquid crystal display module 30. Under the fixing flange 30S, the screw holes 30N and 40N (FIG. 1) overlap, and the screw N (FIG. 1) can be inserted, and the bezel 40 and the liquid crystal display module 30 are fixed to each other. .

<Step 3. Insert into the positioning pin (Fig. 3 (3))>:
When the liquid crystal display module 30 with the bezel 40 in the fixed state is placed on the circuit board 20, the positioning pins 30P extending downward to the positioning pin flange 30K of the liquid crystal display module 30 (FIG. 1) are provided as a circuit. The liquid crystal display module 30 and the circuit board 20 are positioned by passing through the liquid crystal display module positioning holes 22 of the substrate 20 (FIG. 1).
Further, when the circuit board 20 is housed in the housing 10, the housing positioning holes 23 of the circuit board 20 are passed through the positioning pins 13 </ b> P of the positioning pin mounting boss 13 (FIG. 1) of the housing 10. Thereby, positioning with the circuit board 20 and the housing | casing 10 is performed.

<Step 4. FPC assembly (FIG. 3 (4))>:
The flexible printed wiring board 30F of the liquid crystal display module 30 is assembled to the connector 20F on the front side of the circuit board 20. Thereby, each electrode terminal of the circuit board 20 and each electrode terminal of the liquid crystal display module 30 are electrically connected.

<Step 5. Fasten with joint screw N (Fig. 4 (5))>:
The screw hole 30N of the shield piece through-fixing flange 30S of the liquid crystal display module 30 and the screw hole 30N of the liquid crystal display module 30 with the bezel 40, which overlap each other in the previous step, to the through-hole 21 for the fastening screw on the circuit board 20. Are combined and tightened with a joint fastening screw N, the joint fastening screw N is finally fixed to the shield piece fixing boss 11.
As a result, the ground pattern on the surface side of the circuit board 20 is electrically connected to the bezel 40 via the shield piece 40S, and the bezel 40 is at the same potential (ground potential) as the ground pattern of the circuit board 20. The fear of is resolved.

<Operation and Effect of Embodiment 1 of the Present Invention>
The above is the first embodiment of the present invention. According to the first embodiment, it is possible to work in a state where the bezel 40 is visible in any step from the first step 1 to the last step 5. That is, conventionally, when connecting the end of the flexible printed wiring board 300F to the flexible printed wiring board connector 200C (FIG. 8 (6)), when bending the terminal 400T at the tip of the shield piece 400S (FIG. 9 (7)). ), And when screwing the screw N into the screw hole 400N of the terminal 400T of the shield piece 400S (FIG. 9 (8)), the casing 100 had to be turned upside down. (1) When bending the terminal 40T at the tip of the shield piece 40S (FIG. 2 (2)), (2) When connecting the end of the flexible printed wiring board 30F to the flexible printed wiring board connector 20F (FIG. 3 ( 4)) and (3) When the screw N is screwed into the screw hole 40N of the terminal 40T of the shield piece 40S (FIG. 4 (5)), there is no need to turn the casing 10 over. That. Therefore, the jig for turning the casing upside down and setting it on the jig is not necessary, and the time for setting the jig on the jig is not required. It is connected greatly.
In addition, since the casing 10 is not turned over, there is no dust defect caused by turning it over.
Further, all the assembling is performed in the state of step 2, and the position and fixing can be completed by the procedure of steps 3 to 5, which is effective.
Further, since the shield piece 40S of the bezel 40 is sandwiched via the shield piece penetration fixing flange 30S of the liquid crystal display module 30, it is directly screwed to the terminal 400T as in the prior art (FIG. 9 (8)). Thus, the plating layer on the terminal surface can be prevented from being damaged, and the connection reliability is improved.
In addition, a temporary locking structure for temporarily fixing the liquid crystal display module 30 and the bezel 40 as in the past (by housing side) by assembling an assembly structure in which the bezel 40 is assembled to the liquid crystal display module 30 in advance and the terminals are bent. There is no need to provide the locking claw 100K and the inclined protrusion 400K on the bezel side.

<Embodiment 2 of the present invention>
5A and 5B are diagrams for explaining the second embodiment of the present invention. FIG. 5A is a longitudinal sectional view, and FIG. 5B is an enlarged perspective view of a shield piece 40S. In FIG. 5A, the liquid crystal display module 30 and the bezel 40 are fixed by the shield piece penetration fixing flange 30S of the liquid crystal display module 30 and the shield piece 40S of the bezel 40, and the liquid crystal display module with the bezel 40 fixed. 30 and the circuit board 20 are positioned by positioning pins 30P of the liquid crystal display module 30 and liquid crystal display module positioning holes 22 of the circuit board 20, and these and the casing 10 are positioned by the positioning pins 13P and the casing of the circuit board 20. It can be clearly seen that the positioning is performed with the positioning hole 23 for use.
The second embodiment relates to the shield piece 40S. According to the second embodiment, in FIG. 5 (B), two slits 40L with the width of the shield piece 40S are formed in the side wall 40W at the base portion of the side wall 40W of the shield piece 40S, and horizontal from the side wall 40W. A horizontal portion 40H extending in the direction is provided, and the above-described vertical portion 40V is set from the tip thereof.

<Operation and Effect of Embodiment 2>
According to the second embodiment, as described above, the slit 40L is formed in the side wall 40W, and the horizontal portion 40H extending in the horizontal direction from the side wall 40W is provided. Therefore, by the interposition of the slit 40L and the horizontal portion 40H, The range in which the terminal 40T at the tip of the shield piece 40S can move in the front-rear and up-down directions is widened, and variations in parts can be absorbed.

DESCRIPTION OF SYMBOLS 10: Housing | casing 10B: Bottom 10W: Perimeter wall 11: Boss for fixing a shield piece 12: Positioning pin receiving boss for liquid crystal display module 13: Positioning pin mounting boss 13P: Positioning pin 20: Circuit board 20F: Connector 20S: Shield piece 21 : Through hole for co-fastening screw 22: Positioning hole for liquid crystal display module 23: Positioning hole for housing 30: Liquid crystal display module 30B: Liquid crystal display element 30F: Flexible printed wiring board (FPC)
30K: Positioning pin flange 30N: Bezel fixing screw hole 30P: Positioning pin 30S: Shield piece through fixing flange 30T: Terminal 30V: Shield piece through hole 30W: Side wall 40: Bezel 40B: Bent portion 40H: Horizontal portion 40L: Slit 40N: Bezel fixing screw hole 40S: Shield piece 40T: Terminal 40V: Vertical part 40W: Side wall N: Co-tightening screw

Claims (3)

A housing, a circuit board assembled in the housing, a liquid crystal display module that is assembled to the circuit board and includes a shield piece through-fixing flange, and a bezel that is assembled to the liquid crystal display module and includes a shield piece In a liquid crystal display device comprising:
The shield piece through-fixing flange extends horizontally from a plurality of locations on the side wall of the liquid crystal display module, and includes a shield piece through hole.
The bezel has a side wall covering the entire circumference of the side wall of the liquid crystal display module,
The shield pieces are respectively extended from a plurality of locations corresponding to the shield piece penetration fixing flanges on the side wall of the bezel,
The shield piece is composed of a terminal connected to the bent portion and the bent portion leading to said vertical portion and a vertical portion which extends downwardly from the side wall of the bezel,
The vertical portion extends to the shield piece through hole,
The bent portion is bent at the shield piece through-hole,
The terminal is overlapped under the shield piece through-fixing flange, and only by overlapping the terminal under the shield piece through-fixing flange, the bezel is non-detachably locked from the liquid crystal display module,
The liquid crystal display device, wherein the shield piece penetration fixing flange, the terminal of the shield piece, and the circuit board are fastened together with the casing.   The liquid crystal display device according to claim 1, wherein the shield piece includes a horizontal portion extending in a horizontal direction from the side wall between the side wall and the vertical portion of the bezel. The side wall of the bezel, a liquid crystal display device according to claim 2, characterized in that with two slits at the base of the horizontal section spaced the width of the horizontal portion of the shield piece.

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