JP2001264732A - Mutli-color molding type liquid crystal holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-color molding type liquid crystal holder formed by the multi-color molding of a thermoplastic resin and an elastic member, in which breakage by impact can be prevented and the number of components can be reduced. SOLUTION: The multi-color molding type liquid crystal holder has a liquid crystal holder 1a consisting of the thermoplastic resin and fixing and holding liquid crystal, and the elastic member 1b consisting of an elastic material and covering the periphery of the liquid crystal holder. The liquid crystal holder 1a is constituted by a positioning boss 1f which positions a substrate 2. The elastic member 1b is constituted of an engaging claw 1c for engaging the holder at the substrate 2, and liquid crystal holding and fixing claws 1d for holding and fixing liquid crystal 3 and liquid crystal backlash preventing ribs 1e for preventing the backlash of the liquid crystal. With a few number of components, the deformation and breakage during transport can be prevented, the deformation and breakage of the holder and the claws by a dropping impact or the like in a set state with the casing of a portable terminal device can be prevented, and thus the breakage of liquid crystal can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicolor molded liquid crystal holder for a portable terminal.

[0002]

2. Description of the Related Art Conventionally, a liquid crystal holder for fixing and holding a liquid crystal in a portable terminal or the like includes a liquid crystal holder made of one member such as a thermoplastic resin or a sheet metal, and a liquid crystal holder having a backlight unit as a liquid crystal holder. For example, FIG.
There was something like that shown. 6, a liquid crystal holder 10 for holding a liquid crystal includes a board positioning boss 1f that is inserted into a board positioning hole 2a of the printed board 2 to fix the printed board 2, a locking claw 1c that holds and fixes the liquid crystal 3, and
It has a rib 1e for stopping the play of the liquid crystal 3 and the like,
Each is formed of resin or sheet metal. A dustproof cushion 9 is provided between the liquid crystal holder and the housing of the portable terminal.
Has been added. (JP-A-9-288455 (FIG. 6), JP-A-6-18857, JP-A-9-12749)
0, JP-A-6-018857).

[0003]

However, in such a conventional liquid crystal holder, deformation and breakage of the liquid crystal holder when transported alone, deformation of the holder and claws due to a drop impact and the like in a state where the liquid crystal holder is set in a portable terminal housing, or the like, cannot be obtained. Damage and LCD damage,
There have been problems such as deformation and breakage of nails when incorporated into a printed circuit board. In addition, a cushion made of an elastic member is used as a measure against dust of the liquid crystal display portion and a measure against anti-pressing of the liquid crystal.

Further, in a conventional holder made of a light guide plate using a light transmitting resin, as a measure against light diffusion, light leakage, and variations in luminance when the backlight is turned on, a light shielding tape or coating is applied to the side surface of the holder. Therefore, there is a problem that the number of parts and man-hours increase and the cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is constituted by multicolor molding of a thermoplastic resin and an elastic member, thereby preventing damage due to impact and reducing the number of parts. It is intended to provide a molded liquid crystal holder.

[0006]

The multicolor molded liquid crystal holder according to the present invention comprises a liquid crystal holder made of a thermoplastic resin and fixedly holding the liquid crystal, and an elastic member made of an elastic material and covering the periphery of the liquid crystal holder. In addition, it has a configuration that is configured by multicolor molding of a thermoplastic resin and an elastic member. With this configuration, deformation and breakage during transportation of the unit alone, prevention of deformation and breakage of the holder and claws due to drop impact and the like in a set state with the mobile terminal housing,
It is possible to prevent liquid crystal breakage, prevent deformation and breakage of nails when assembling the printed circuit board, prevent dust, prevent liquid crystal breakage against pressure resistance, suppress light diffusion when backlight is turned on, light leakage, and variations in brightness.

The multicolor molding liquid crystal holder according to the present invention has a configuration in which the elastic member includes a locking claw for locking the printed circuit board, and the locking claw is made of an elastic material. With this configuration, the holder claws are provided with flexibility to prevent deformation and breakage of the claws due to a drop impact or the like when set to the portable terminal housing, and to prevent deformation and breakage of the holder claws when assembling the printed circuit board. be able to.

The multi-color molded liquid crystal holder according to the present invention has a configuration in which the liquid crystal holder includes a substrate positioning boss for positioning a printed circuit board, and the substrate positioning boss is formed of a thermoplastic resin. With this configuration, it is possible to perform accurate positioning without play on the printed circuit board.

In the multicolor molding liquid crystal holder according to the present invention, the elastic member includes a liquid crystal holding and fixing claw for holding and fixing the liquid crystal, and the liquid crystal holding and fixing claw is made of an elastic material. With this configuration, the liquid crystal can always be given a flexible tension, preventing the holder from being deformed or damaged due to a drop impact when set to the mobile terminal housing, and preventing the liquid crystal from being damaged. Can be.

The multicolor molded liquid crystal holder according to the present invention has a constitution in which the elastic member includes a liquid crystal stop rib for stopping the liquid crystal, and the liquid crystal stop rib is made of an elastic material. ing. With this configuration, the liquid crystal can always be given a flexible tension, preventing the holder from being deformed or damaged due to a drop impact when set to the mobile terminal housing, and preventing the liquid crystal from being damaged. Can be.

The multicolor molded liquid crystal holder according to the present invention has a construction in which the thermoplastic resin of the liquid crystal holder is made of a light transmitting resin, and the elastic material of the elastic member has an opaque color. With this configuration, it is possible to suppress light diffusion, light leakage, luminance variation, and the like when the backlight is turned on.

The multicolor molded liquid crystal holder according to the present invention has a configuration in which the elastic member is configured to cover a side portion of the multicolor molded liquid crystal holder. With this configuration, it is possible to suppress light diffusion, light leakage, luminance variation, and the like when the backlight is turned on.

The multicolor molded liquid crystal holder according to the present invention has a configuration in which the elastic member is configured to cover an upper portion of the multicolor molded liquid crystal holder. With this configuration, the liquid crystal holder and the housing of the mobile terminal are brought into close contact with each other, preventing damage to the liquid crystal and taking measures against dust and pressure resistance to reduce the number of parts, man-hours, and cost. It can be planned.

The multicolor molded liquid crystal holder according to the present invention has a configuration in which the elastic member covers an upper portion of the multicolor molded liquid crystal holder, and a convex rib is provided on the upper portion of the elastic member. With this configuration, the liquid crystal holder and the housing of the mobile terminal are brought into close contact with each other, preventing damage to the liquid crystal and taking measures against dust and pressure resistance to reduce the number of parts, man-hours, and cost. It can be planned.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, first to third embodiments of the present invention will be described in detail with reference to FIGS. First, a multicolor molded liquid crystal holder according to a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the multicolor molded liquid crystal holder 1 according to the first embodiment of the present invention is formed by multicolor molding of a liquid crystal holder 1a made of a thermoplastic resin and an elastic member 1b made of an elastic material. The liquid crystal holder 1a has a board positioning boss 1f that is inserted into the board positioning hole 2a of the printed board 2 to fix the printed board 2, and the elastic member 1b holds and fixes the printed board 2 (or the liquid crystal holder 1).
a) on the printed circuit board 2) a locking claw 1c;
And a liquid crystal holding rib 1e for holding and fixing the liquid crystal 3 and a liquid crystal stop rib 1e for stopping the play of the liquid crystal 3. The multi-color molding liquid crystal holder 1 holds and fixes the liquid crystal 3 in the elastic member 1b, and holds and fixes the printed board 2 with the locking claws 1c and the board positioning boss 1f.

As described above, the multicolor molding liquid crystal holder 1
Have locking claws 1c for locking the printed circuit board 2 respectively.
, A liquid crystal holding and fixing claw 1 d for holding and fixing the liquid crystal 3, a liquid crystal retaining rib 1 e for holding the liquid crystal 3, and at least one or more board positioning bosses 1 f for positioning the printed circuit board 2. The number is not limited to any number according to the size, shape and arrangement of the liquid crystal 3. The liquid crystal holder 1a used here is made of a thermoplastic resin such as an acrylic resin or a polycarbonate resin, and the elastic member 1b is made of an elastic material such as a thermoplastic elastomer or silicone rubber.

The liquid crystal holder 1a is made of an acrylic resin, a polycarbonate resin, etc., as well as an ABS resin, a vinyl chloride resin, a polystyrene, a polyethylene, a polypropylene, a polyamide, a butylate resin, a polyacetal, a vinylidene chloride resin, a polyacetal, a fluorine resin, a polyarylate. And other plastic materials can also be used. In addition, as the material of the elastic member, in addition to thermoplastic elastomer and silicone rubber, acrylonitrile butadiene rubber, ethylene propylene rubber, isobutylene, isobrene rubber, chlorobrene rubber, fluorine rubber, urethane rubber, acrylic rubber, hydrin rubber, Rubbers such as butyl rubber can also be used.

Next, a method of assembling the multicolor molded liquid crystal holder according to the first embodiment of the present invention will be briefly described with reference to FIG. First, the liquid crystal holder 1a and the elastic member 1b made of different materials are separately molded, and then combined to form one multicolor molded liquid crystal holder 1. Of course, from the beginning, the liquid crystal holder 1a and the elastic member 1b may be collectively formed into one multi-color molded liquid crystal holder 1. Such molding of different materials into one body is called multicolor molding. Next, the molded multicolored liquid crystal holder 1, the printed circuit board 2, and the liquid crystal 3 are assembled.
The liquid crystal assembly is set on the mobile terminal housing 4.
When assembled in this manner, a multicolor molded liquid crystal holder 1 is formed in which the elastic member 1b covers the side and upper part of the liquid crystal holder 1a in which the liquid crystal 3 is incorporated. At this time, the assembling procedure and assembling method of the multicolor molded liquid crystal holder 1, the printed circuit board 2, and the liquid crystal 3 can be changed depending on the use, ease of assembling, process, and the like. At this time, the liquid crystal 3 and the printed board 2 are connected by a TAB connector, a heat seal connector, a spring connector, a plexible board, a conductive rubber, or the like.

Next, with reference to FIG. 2, the configuration of the multicolor molded liquid crystal holder according to the first embodiment of the present invention will be described in detail. 2A and 2B show a liquid crystal holding and fixing claw 1 for holding and fixing a liquid crystal 3 in a multicolor molding liquid crystal holder 1.
d, a cross-sectional view of a liquid crystal stop rib 1e for stopping the liquid crystal 3 when the liquid crystal 3 is incorporated in the multicolor molded liquid crystal holder 1; A fixed claw 1d and a liquid crystal stop rib 1e for stopping the liquid crystal 3 are constituted by an elastic member 1b. A normal clearance is provided between the outer shape of the liquid crystal 3 and the periphery of the liquid crystal holding / fixing claw 1d and the liquid crystal stop rib 1e. A is set.

Next, referring to FIGS. 2C and 2D,
The state when the liquid crystal assembly is dropped will be described. When the liquid crystal assembly is dropped, the liquid crystal 3 rattles in a plane direction in the multicolor molded liquid crystal holder 1 due to an impact such as dropping,
When the liquid crystal holding and fixing claw 1d or the liquid crystal hits the inner wall of the stop rib 1e, rigid bodies collide with each other in a conventional holder made of only a thermoplastic resin liquid crystal holder,
Although the liquid crystal and the holder were damaged, according to the multicolor molded liquid crystal holder in the first embodiment, the liquid crystal holding and fixing claws 1d and the liquid crystal retaining ribs 1e are elastic members. The holder can be prevented from being damaged.

As described above, the clearance A is usually set around the outer shape of the liquid crystal 3 and the liquid crystal holding / fixing claw 1d and the liquid crystal retaining rib 1e, but actually, the elastic member 1b is formed. Depending on conditions, liquid crystal outer shape variations, assembly variations, and the like, there is a possibility that the peripheral clearance A may vary to a large or small value. Assuming that the outer shape of the liquid crystal is larger than the inner diameter of the holder, the clearance A is in the minus direction,
Even in the case of contact with the inner wall (FIGS. 2C and 2D), the liquid crystal 3 and the liquid crystal holding and fixing claw 1d and the liquid crystal are clogged because the liquid crystal holding and fixing claw 1d and the liquid crystal retaining rib 1e are elastic members. The stress applied to the stopper rib 1e does not exceed the allowable range, so that the liquid crystal breakage and the holder breakage can be prevented.

Next, referring to FIGS. 3A and 3B,
The positioning of the printed circuit board 2 will be described. FIGS. 3A and 3B show the locking claw 1c of the multicolor molded liquid crystal holder 1 locked to the printed board 2 and the board positioning boss 1f of the liquid crystal holder 1a for positioning with respect to the printed board 2. FIG. 3A is a sectional view, and as can be seen from FIG. 3A, when the multicolor molded liquid crystal holder 1 including the liquid crystal holder 1a and the elastic member 1b is vertically assembled to the printed circuit board 2, the elastic member 1b is locked. Since the claw 1c is made of a resilient member, even if the locking claw 1c is deformed and inserted outward (arrow B) at the time of assembling, the claw 1c has a structure without deformation, breakage, and the like. Setting and management of position and dimensions are easy. Further, even if a stress is applied to the locking claw 1c due to an impact such as a drop, no deformation or breakage occurs. At this time, the shape of the locking claw 1c is such that the surface corresponding to the end surface of the printed circuit board 2 is usually a C-plane shape, and it is easy to fit the end surface of the printed circuit board 2 well. Further, when the multi-color molding liquid crystal holder 1 is incorporated into the printed circuit board 2, the locking claws 1 are manually inserted.
Even if c is spread outward (in the direction of arrow B) and incorporated, no deformation or breakage occurs.

The positioning of the multi-color molded liquid crystal holder 1 with respect to the printed board 2 can be performed by fitting a board positioning boss 1f formed on the liquid crystal holder 1a with a board positioning hole 2a of the printed board 2, so that it can be positioned in a plane direction. The rattling and accurate positioning can be performed. At this time, by reducing the accuracy of the peripheral clearance C between the board positioning boss 1f and the board positioning hole 2a, more accurate positioning and rattling can be performed.

Next, a multicolor molded liquid crystal holder according to a second embodiment of the present invention will be described with reference to FIGS. 4 (A), 4 (B) and 4 (C). The multicolor molded liquid crystal holder 1 shown in FIG. 4A shows an arrangement example of the backlight unit 5, and FIG. 4B shows an optical path simulation when the backlight is turned on. (C) shows a cross section of the conventional light-shielding tape or coating 8. As shown in FIGS. 4A and 4B, the multicolor molded liquid crystal holder 1 in the second embodiment is formed by multicolor molding of a liquid crystal holder 1a made of a thermoplastic resin and an elastic member 1b. The liquid crystal holder 1a is formed of a light transmitting resin, and the elastic member 1b is formed of an opaque color. The light transmitting resin is an acrylic resin, a polycarbonate resin, or the like, and the opaque color of the elastic member 1b is a thermoplastic elastomer, silicon rubber, or the like. This is different from the first embodiment in that the liquid crystal holder 1a
The difference is that the color of the elastic member 1b is limited and the backlight unit 5 is added. The liquid crystal holder 1a formed of a light transmitting resin is used as a light guide plate, and the liquid crystal surface is subjected to graining so as to easily diffuse light.

According to this configuration, as can be seen from FIGS. 4A and 4B, the multicolor molded liquid crystal holder 1 of the present invention incorporates the backlight unit 5 or mounts the backlight unit 5 on the substrate. When set on the top and light is projected from the side or the back side, the opaque elastic member 1
b is configured to cover the side surface of the liquid crystal holder 1a formed of light transmitting resin, so that the optical path 6 is formed by the elastic member 1b on the side surface.
And always goes inward (6B) of the liquid crystal holder 1a. In particular, since the elastic member 1b is molded in an opaque color, the elastic member 1b does not leak in the outer side direction (6A). As a result, light diffusion, light leakage, variation in luminance, and the like can be eliminated, and as shown in FIG. 4C, the light-shielding tape or paint 8 conventionally used can be eliminated. In addition, the backlight unit 5 described here is L
The unit is constituted by an ED element or a lamp, but may be another unit, and the number is determined by the size of the liquid crystal and the like.

Next, a multicolor molded liquid crystal holder according to a third embodiment of the present invention will be described with reference to FIGS. 5 (A), 5 (B) and 5 (C). The upper end surface of the multicolor molded liquid crystal holder 1 shown in FIG. 5A is covered with an elastic member 1b, and the elastic member 1b is in a state in which the multicolor molded liquid crystal holder 1 and the portable terminal case 4 are in close contact with each other. FIG. 5B is a cross-sectional view of the holder 1 when the upper end surface of the multi-color molded liquid crystal holder 1 is covered with an elastic member 1b and further provided with a convex rib 7 on the upper surface thereof. FIG. 5C shows a cross section of the elastic member 1 b in a state where the housing 4 is in close contact with the housing 4, and FIG. This is different from the first and second embodiments in that the upper end surface of the multicolor molded liquid crystal holder 1 is covered with an elastic member 1b, and that a convex rib 7 is added on the elastic member 1b. are doing.

According to this configuration, the liquid crystal holder 1 and the portable terminal case 4 can be brought into close contact with each other to take measures against dust, and by eliminating the conventional dust cushion 9 (FIG. 6), parts can be eliminated. Points and man-hours can be reduced, and costs can be reduced. Also, with respect to the pressure resistance, the elastic member 1b is provided between the multicolor molded liquid crystal holder 1 and the portable terminal housing 4.
In order to reduce the stress on the liquid crystal 3 and the multicolor molding liquid crystal holder 1 to prevent liquid crystal cracking, etc., and to eliminate the conventional cushion, the number of parts and man-hours are reduced, and the cost is reduced. Can be.

The first to third aspects of the present invention described above
In the multicolor molded liquid crystal holder 1 according to the embodiment,
Although the multi-color molded liquid crystal holder 1 having the two-member configuration of the liquid crystal holder 1a and the elastic member 1b has been described, the present invention is also applicable to a combination of various types and grades of the liquid crystal holder 1a and the elastic member 1b. Effects can be obtained.

[0029]

The multicolor molded liquid crystal holder of the present invention is constructed as described above. In particular, the multicolor molded liquid crystal holder is formed by multicolor molding of the liquid crystal holder and the elastic member, so that the liquid crystal holder is deformed and damaged during transportation alone. And the deformation and breakage of the holder and nails due to the impact of dropping while being set to the mobile terminal housing, the damage of the liquid crystal, and the prevention of deformation and damage of the nails when incorporated into a printed circuit board. Reduction of parts and man-hours and cost reduction by eliminating cushions for dustproofing and liquid crystal anti-pressing measures, and abolition of light-shielding tape and painting to prevent light diffusion, light leakage, or brightness variation when backlight is turned on Excellent effects such as reduction in the number of parts and man-hours and cost can be exhibited.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a multicolor molded liquid crystal holder according to a first embodiment of the present invention;

2A and 2B are cross-sectional views of a liquid crystal holding and fixing claw for holding and fixing liquid crystal in a multicolor molded liquid crystal holder shown in FIG. 1 and a liquid crystal retaining rib for stopping liquid crystal, and FIG. Sectional view of a nail, (B) is a sectional view of a stopper rib for liquid crystal, (C).
7A is a cross-sectional view of the liquid crystal holding and fixing claw showing a state in which the liquid crystal collides with the liquid crystal holding and fixing claw due to the drop of the liquid crystal assembly. FIG. Cross section of the stop ribs for liquid crystal,

3A and 3B are cross-sectional views of an elastic member locked to the printed board and a liquid crystal holder for positioning the printed board shown in FIG. 1; FIG. 3A shows a state in which a locking claw of the elastic member is fitted into the printed board; FIG. 1B is a diagram showing a state in which a locking claw of an elastic member is fitted into a printed circuit board;

FIG. 4 is an exploded perspective view showing a configuration of a multicolor molded liquid crystal holder according to a second embodiment of the present invention, and FIG. 4 (A) is a diagram showing an arrangement example of a backlight unit of the multicolor molded liquid crystal holder. (B) is a diagram showing an optical path simulation when the backlight is turned on, (C) is a diagram showing an example of the arrangement of a backlight unit showing a cross section of the conventional light-shielding tape or painted 8,

FIG. 5 is a cross-sectional view illustrating a configuration of a multicolor molded liquid crystal holder according to a third embodiment of the present invention, where (A) is an elastic member showing a state in which the upper end of the liquid crystal holder is covered with an elastic member. (B) is a cross-sectional view showing a state in which the upper end of the liquid crystal holder is covered with an elastic member and a convex rib is provided thereon, and (C) shows the convex rib with the housing of the mobile terminal removed. Figure,

FIG. 6 is a diagram showing a conventional liquid crystal arrangement example and an arrangement example of a dustproof cushion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-color molding type liquid crystal holder 1a Liquid crystal holder 1b Elastic member 1c Locking claw 1d Liquid crystal holding and fixing claw 1e Liquid crystal stop rib 1f Board positioning boss 2 Printed board 2a Board positioning 2b Notch 3 Liquid crystal 4 Mobile terminal housing Reference Signs List 5 backlight unit 6 optical path 7 convex rib 8 light shielding tape or coating 9 dustproof cushion 10 thermoplastic resin liquid crystal holder

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H088 EA22 MA16 MA20 2H089 HA40 JA10 QA02 QA12 QA13 UA09 5G435 AA07 BB12 EE05 EE13 EE25 GG42 KK02 KK03 KK05 LL07

Claims (9)

[Claims] A liquid crystal holder made of a thermoplastic resin and fixedly holding the liquid crystal; and an elastic member made of an elastic material and covering the periphery of the liquid crystal holder. The liquid crystal holder is formed by multicolor molding of the thermoplastic resin and the elastic member. A multicolor molded liquid crystal holder characterized by the following features. 2. The multicolor molded liquid crystal holder according to claim 1, wherein said elastic member includes a locking claw for locking a printed circuit board, and said locking claw is made of an elastic material. 3. The liquid crystal holder according to claim 1, further comprising a board positioning boss for positioning a printed circuit board, wherein the board positioning boss is made of a thermoplastic resin.
Multicolor molding liquid crystal holder as described. 4. The multicolor molded liquid crystal holder according to claim 1, wherein said elastic member includes a liquid crystal holding and fixing claw for holding and fixing a liquid crystal, and said liquid crystal holding and fixing claw is made of an elastic material. 5. The multicolor molding die according to claim 1, wherein said elastic member includes a liquid crystal stop rib for stopping liquid crystal, and said liquid crystal stop rib is made of an elastic material. LCD holder. 6. The multicolor molded liquid crystal holder according to claim 1, wherein the thermoplastic resin of the liquid crystal holder is made of a light transmitting resin, and the elastic material of the elastic member has an opaque color. 7. The multicolor molded liquid crystal holder according to claim 1, wherein said elastic member is configured to cover a side portion of said multicolor molded liquid crystal holder. 8. The multicolor molded liquid crystal holder according to claim 1, wherein said elastic member covers the upper portion of said multicolor molded liquid crystal holder. 9. The multicolor molded liquid crystal holder according to claim 1, wherein said elastic member covers an upper portion of said multicolor molded liquid crystal holder, and a convex rib is provided on said elastic member.