JP3016411U - LCD unit mounting structure - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To allow liquid crystal display panels to be fixed to a printed circuit board together with anisotropic conductive connectors. A liquid crystal display panel 1 and an anisotropic conductive connector 2 that is in contact with an electrode array 11 of the liquid crystal display panel 1 are housed in an LCD holder 3 and attached to a printed circuit board P.
A pair of tongue pieces 32a, 32b formed by extending the wall surface of the CD holder 3 downward and forming locking pieces 33a, 33b whose tip extends in the direction of an arrow in a direction parallel to the wall surface, and the tongue pieces 32a, 32.
The locking hole 5 is provided at a position on the printed circuit board P corresponding to b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for an LCD unit.

[0002]

[Prior art]

 An LCD unit generally used as a display means of an electronic device is configured to display predetermined information by controlling the voltage applied to a plurality of display pixels formed on a liquid crystal display panel. , For example I. T. The thin film electrodes made of O (indium oxide) or the like are formed by an electrode array in which a plurality of thin film electrodes are arranged orthogonally at a minute interval.

The liquid crystal display panel having such a configuration is arranged in the LCD holder so that the anisotropic conductive connector is brought into contact with the electrode array, and the LCD holder is attached to the printed circuit board.

The anisotropic conductive connector means that a conductive material such as nickel in an insulating base material such as styrene rubber is continuous only with each electrode of the liquid crystal display panel and the electrode terminal on the printed circuit board side. The LCD unit can be operated without performing the work of individually connecting the thin film electrodes and the electrode terminals of the print substrate.

FIG. 4 is an exploded perspective view of a conventional LCD unit mounting structure using the anisotropic conductive connector, and FIG. 5 is a perspective view of a mounting state using the mounting structure. As shown in FIG. 4, an electrode array 11 is formed on the back surface of the liquid crystal display panel 1, and the anisotropic conductive connector 2 is brought into contact with the electrode array 11 and housed in the LCD holder 61. Further, the LCD holder 61 is attached to the printed board P. Further, on the printed circuit board P side, electrode terminals 12 are formed at positions where the anisotropic conductive connector 2 abuts when the LCD holder 61 is attached to the printed circuit board P. In this structure, a transparent resin reflector 4 is housed on the back surface of the liquid crystal display panel 1 to prevent the liquid crystal display panel 1 from being displaced in the LCD holder 61, and to provide illumination means (not shown). Light from is guided to the back surface of the liquid crystal display panel 1.

On the back side (printed circuit board P) side of the LCD holder 61, a plurality of L-shaped tongue pieces 62 are provided so as to project in a plan view, while on the printed circuit board P, the tongue pieces 62 correspond to each other. A fixed groove 71 and a fixed slit 72 are provided. After inserting the tongue piece 62 of the LCD holder 61 accommodating the liquid crystal display panel 1 and the anisotropic conductive connector 2 into the fixing groove 71 or the fixing slit 72, as shown in FIG. The tip portion of the tongue piece 62 protruding to the rear surface of the P is bent in the plate thickness direction of the tongue piece 62 using a tool such as radio pliers and fixed to the printed circuit board P.

As another structure for attaching an electronic component to a printed circuit board, for example, a structure as disclosed in Japanese Patent Laid-Open No. 4-6119 can be considered. That is, as shown in FIG. 6, on the LCD holder 61 side, a pair of left and right tongue pieces 65a and 65b are formed by extending the wall surface of the LCD holder 61 and projecting locking pieces 66a and 66b in a direction perpendicular to the wall surface. By providing the locking pieces 66a, 66b into the locking holes 7a, 7b provided on the printed circuit board side, the L CD holder is attached to the printed circuit board.

[0008]

[Problems to be solved by the device]

 However, according to the above-described conventional configuration, the work of extremely low efficiency, in which the tongues 62 are bent one by one in order to fix the LCD holder 61 to the printed circuit board P 1, is inevitable.

Further, the anisotropic conductive connector 2 is simply arranged in the LCD holder 61 so as to abut the electrode array 11 of the liquid crystal display panel 1, and the LCD holder 61 is attached to the printed circuit board P. During the work, the liquid crystal display panel 1 may be moved from the normal contact position with respect to the electrode array 11 and the electrode terminal 12 to cause malfunction of the liquid crystal display panel 1.

Moreover, when a malfunction due to the displacement of the anisotropic conductive connector 2 is found, the bent portions of all the tongues 62 are restored again using a tool, and then the LCD holder 61 is printed. After removing from the board | substrate P, the operation | work by the complicated procedure of bending the said tongue piece again was forced.

According to the structure described in Japanese Patent Application Laid-Open No. 4-6119, since the locking pieces 66a and 66b project in the direction perpendicular to the wall surface of the LCD holder, the state shown in FIG. As shown in FIG. 6B, the anisotropic conductive connector 2 is in a state of being spread over the wall surface, and the anisotropic conductive connector 2 is displaced, which may result in display failure.

The present invention has been proposed in view of the above-mentioned conventional circumstances, and makes it possible to fix the liquid crystal display panel together with an anisotropic conductive connector to a printed circuit board in a very simple manner. It is an object of the present invention to provide an LCD unit mounting structure capable of preventing the position shift of the LCD unit.

[0013]

[Means for Solving the Problems]

 The present invention adopts the following means to achieve the above object. That is, for example, as shown in FIG. 1, a liquid crystal display panel 1 and an anisotropic conductive connector 2 that is brought into contact with an electrode array 11 of the liquid crystal display panel 1 are housed in an LCD holder 3 and the LCD In the LCD unit mounting structure in which the holder 3 is mounted on the printed circuit board P, the locking pieces 33a, 33b are formed by extending the wall surface of the LCD holder 3 downward so that the tip extends in the direction of an arrow in a direction parallel to the wall surface. At least one pair of tongue pieces 32a, 32b formed with the tongue pieces 32a, 32b, and the locking pieces when the tongue pieces 32a, 32b are inserted while being provided at positions corresponding to the tongue pieces 32a, 32b on the printed circuit board P. The LCD holder 3 is configured to have a locking hole 5 for locking the printed circuit board P by 33a and 33b.

The locking pieces 33a, 33b are formed in parallel to the pair of tongue pieces 33a, 33b, and the end of the locking hole 5 and the locking pieces 33a, 33b are engaged with each other, so that L The CD holder 3 is attached to the printed board P.

Further, for example, as shown in FIG. 3, the locking pieces 33a, 33b are formed in a pair of tongue pieces 32a, 32b in a V shape, and the side portions of the locking hole 5 and the above-mentioned locking pieces 33a, 33b are formed. The LCD holder 3 is attached to the printed circuit board P by engaging the locking pieces 33a and 33b.

[0016]

[Action]

 When the locking pieces 33a, 33b are formed parallel to the pair of tongue pieces 32a, 32b, they are formed at the tips of the tongue pieces 32a, 32b when the tongue pieces 32a, 32b are inserted into the locking holes 5. The locking pieces 33a, 33b fit into the locking holes 5 while bending in the wall surface direction of the LCD holder 3, and the locking pieces 33a, 33b wrap around the lower side of the printed circuit board P so that the LCD holder 3 is placed on the printed circuit board P. Lock. At this time, since the tongue pieces 32a and 32b are bent only in the wall surface direction, the liquid crystal display panel 1 is printed together with the LCD holder 3 without shifting the position of the anisotropic conductive connector 2 once set in the LCD holder 3. It becomes possible to attach it to the substrate P.

When the locking pieces 33a, 33b are formed in the pair of tongue pieces 32a, 32b in a "V" shape, the "K" shaped locking pieces 33a, 33b are formed on the printed circuit board P. The LCD holder 3 is wrapped around the lower side and locked to the printed circuit board P. At this time, since the tongue pieces 32a and 32b are bent only in the wall surface direction, the liquid crystal display panel 2 can be attached to the printed circuit board P together with the LCD holder 3 without shifting the position of the anisotropic conductive connector 2 once set. It will be possible.

[0018]

【Example】

 FIG. 1 (a) is a perspective view of an embodiment of the present invention. The LCD holder 3 is provided with an opening 30 on the upper surface so that the entire surface of the liquid crystal display panel 1 is exposed, and the side surface is a wall surface with a predetermined height. A part of the outer peripheral wall surface 31 of the LCD holder 3 is extended downward in two lines to form tongue pieces 32a and 32b, and the tip ends thereof are flared toward the one side in the shape of an arrow to the tongue pieces 32a and 32b. A step portion is formed between the two and to serve as locking pieces 33a and 33b. On the other hand, the locking hole 5 is provided at a position corresponding to the tongues 32a and 32b on the printed circuit board P side. The required number of the pair of tongue pieces 32a, 32b are provided on the outer periphery of the LCD holder, and naturally the same number of the locking holes 5 are provided.

As described above, the electrode array 11 is formed on one or both lower surfaces of the back surface of the liquid crystal display panel 1, the anisotropic conductive connector 2 is brought into contact with the electrode array 11, and the reflector plate is further provided. 4 is placed behind the liquid crystal display panel 1 and accommodated in the LCD holder 3. Further, on the printed circuit board P side, electrode terminals 12 are formed at positions where the anisotropic conductive connector 2 abuts when the LCD holder 3 is attached to the printed circuit board P.

As described above, the LCD holder 3 accommodating the liquid crystal display panel 1, the anisotropic conductive connector 2, and the reflection plate 4 is provided with the tongue pieces 32 a and 32 b on the printed circuit board P with respect to the locking hole 5. To insert. The length of the locking hole 5 in the longitudinal direction is formed so as to be a little narrower than the spreading tip of the locking pieces 33a, 33b, and the tongue pieces 32a, 32b are inserted into the locking pieces 33a, 33b at the time of insertion. As the side surface of the arrow-shaped body comes into contact with the end of the locking hole 5 and is inserted, the tongues 32a and 32b are pressed against the elasticity of the tongue 32a and 32b, and the locking pieces 33a and 33b are locked. After passing through the hole 5, as shown in FIG. 1 (b), the locking pieces 33a, 33b and the ends of the locking hole 5 are engaged with each other to lock the LCD holder 3 on the printed circuit board P.

Therefore, when the tongues 32a and 32b are inserted, the tongues 32a and 32b do not spread in the direction perpendicular to the wall surface and the anisotropic conductive connector 2 is not displaced.

FIG. 2 is a side view of a locked state showing a modified example of the embodiment shown in FIG. A pair of tongue pieces 32a, 32b are formed at both ends of the LCD holder 3, and locking holes 5 are formed corresponding to the tongue pieces 32a, 32b.

FIG. 3A is a perspective view showing another embodiment of the present invention. The locking pieces 33a, 33b formed in the shape of arrowheads formed at the front ends of the tongue pieces 32a, 32b are further bent into a dogleg shape when viewed from the plane. In addition, the width of the locking hole 5 in the lateral direction is set to be narrower than the “bending” bending width. In this structure, when the LCD holder 3 is attached to the printed circuit board P, as the locking pieces 33a and 33b of the "U" shape are sequentially inserted into the locking holes 5 from the tips, the "U" shape is formed. Although the elasticity of the body becomes stronger, the tongue pieces 32a and 32b are further inserted into the locking holes 5 against the elasticity of the V-shaped body. When it comes out to the back side of P, the tip of the above-mentioned "C" is locked to the side surface of the locking hole 5 as shown in FIG. 3 (b). However, at this time, the tongues 32a and 32b do not spread in the direction perpendicular to the outer peripheral wall, so that the anisotropic conductive connector 2 is not displaced.

[0024]

[Effect of device]

 As described above, according to the present invention, when the tongue piece of the LCD holder is inserted into the locking hole, the tongue piece moves or does not move in parallel with the wall surface. The liquid crystal panel can be attached to the printed circuit board without the conductive connector being displaced.

[Brief description of drawings]

FIG. 1A is a perspective view of an embodiment of the present invention. (b) It is a locked state side view of the embodiment shown in FIG. 1 (a).

FIG. 2 is a side view showing a locked state of another embodiment of the present invention.

FIG. 3 (a) is a perspective view of another embodiment of the present invention. (b) It is a locked state plan view of the embodiment shown in FIG. 3 (a).

FIG. 4 is an exploded perspective view of a conventional example.

FIG. 5 is a perspective view showing a mounting state of a conventional example.

FIG. 6 is a side sectional view of another conventional example.

[Explanation of symbols]

 1 Liquid Crystal Display Panel 2 Anisotropic Conductive Connector 3 LCD Holder 5 Locking Holes 11 Electrode Array 33a, 33b Locking Pieces 32a, 32b Tongue Piece P Printed Circuit Board

Claims (3)

[Scope of utility model registration request] 1. An LCD comprising a liquid crystal display panel and an anisotropic conductive connector brought into contact with an electrode array of the liquid crystal display panel.
In a structure for mounting an LCD unit, which is housed in a holder, and the LCD holder is mounted on a printed circuit board, a locking piece which extends a wall surface of the LCD holder downward and whose tip extends like an arrow in a direction parallel to the wall surface. And a pair of tongues each having a tongue and a position on the printed circuit board that corresponds to the tongues, and that engages the LCD holder with the printed circuit board by the locking piece when the tongue is inserted. LCD unit mounting structure consisting of a stop hole. 2. The LCD according to claim 1, wherein the LCD holder is attached to the printed circuit board by engaging the locking pieces formed in parallel with the pair of tongues with the ends of the locking holes.
Unit mounting structure. 3. An L-shaped engaging piece formed on the pair of tongue pieces and a side portion of the engaging hole are engaged with each other.
The LCD unit mounting structure according to claim 1, wherein the CD holder is mounted on a printed circuit board.