JP3357597B2 - LCD terminal positioning structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display which is fixed to a light guide plate for introducing and illuminating light from a light source with respect to a dial or a pointer in an instrument, and connecting the terminals of the liquid crystal display to a circuit board. The present invention relates to a structure for positioning an LCD terminal when the LCD terminal is fitted into the LCD connector mounted on the LCD terminal.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional LCD terminal positioning structure, which is applied to an automotive instrument. A liquid crystal display (LCD) 1 is fixed to a light guide plate 3 for introducing light from a light source disposed on the back side of the dial to an unillustrated dial and hands in an instrument for an automobile and illuminating the dial from the back side. Have been. A concave portion for setting the liquid crystal display 1 is formed in the light guide plate 3, and the liquid crystal display 1 set in this concave portion is fixed by a fixture 5 called a bezel.
Hold down the peripheral part of and fix it.

A plurality of terminals 1a of the liquid crystal display 1
It penetrates through the light guide plate 3 and protrudes downward. Positioning guide protrusions 3 protruding forward (downward in the figure) from the tips of the terminals 1a are provided near both ends in the arrangement direction of the plurality of terminals 1a.
a is formed integrally with the light guide plate 3.

On the other hand, an LCD connector 9 in which the LCD terminal 1a is fitted into a terminal hole 9a is mounted on a circuit board 7 on which a movement or an electronic component (not shown) for driving a pointer in a speedometer or the like is mounted. . This L
The CD connector 9 has guide grooves 9b on the side portions at both ends in the longitudinal direction, into which the guide protrusions 3a of the light guide plate 3 are fitted.

In the above-described LCD terminal positioning structure, the liquid crystal display 1 is positioned with respect to the LCD connector 9 by fitting the guide projections 3a of the light guide plate 3 into the guide grooves 9a of the LCD connector 9, thereby positioning the terminal 1a.
Can be easily fitted into the terminal hole 9b.

[0006]

As shown in FIG. 5, when the size of the liquid crystal display 1 is increased and the number of terminals 1a is increased, two LCD connectors 9 are used correspondingly. If a positioning structure similar to that shown in FIG. 4 is employed, four guide projections 3a are required on the light guide plate 3 corresponding to the guide grooves 9b of the two LCD connectors 9.

However, in such a structure, when the guide projections 3a are simultaneously inserted into the guide grooves 9b for positioning when the terminals 1a are inserted into the terminal holes 9a, there are four guide projections 3a. However, the insertion (positioning) work becomes extremely difficult, resulting in a decrease in workability.

SUMMARY OF THE INVENTION It is an object of the present invention to facilitate a positioning operation when fitting an LCD terminal to an LCD connector in a case where a liquid crystal display is enlarged and a plurality of LCD connectors are used.

[0009]

In order to achieve the above object, the invention of claim 1 is directed to a light guide for illuminating a liquid crystal display by introducing light from a light source to a dial or a pointer in an instrument. In a positioning structure of the LCD terminal when the plurality of terminals of the liquid crystal display are fixed to a board and fitted into the LCD connector mounted on the circuit board, the LCD connector is arranged along the arrangement direction of the plurality of terminals. Two end guide portions which are arranged at predetermined intervals and are formed on the light guide plate near both ends in the arrangement direction of the plurality of terminals in parallel with the terminals and protruding forward from the ends of the terminals; A plurality of terminal groups provided respectively corresponding to the two LCD connectors, and a center guide portion formed so as to protrude in the same direction as the both-end guide portions, respectively;
A connector-side both-end guide portion to be fitted to the both-end guide portion is provided on each side of both ends in the arrangement direction of the two LCD connectors, and a connector-side central guide portion to be fitted to the central guide portion is provided on the two LCD connectors. The light guide plate is provided on side portions facing each other, and the length of the central guide portion of the light guide plate in the protruding direction is longer than the length of both end guide portions.

According to the above-described structure for positioning the LCD terminals, when the light guide plate on which the liquid crystal display is fixed is brought close to the LCD connector, the center guide portion of the light guide plate is first fitted into the center guide portion on the connector side, and thereafter the light guide plate is fitted. The guides at both ends of the plate fit into the guides at both ends of the connector, thereby
The positioning of the CD terminal with respect to the LCD connector is performed. When the light guide plate is further pushed into the LCD connector side in this state, the terminals of the liquid crystal display are fitted into the terminal holes of the LCD connector.

According to a second aspect of the present invention, in the configuration of the first aspect, the terminal is inserted into a terminal guide hole formed in the light guide plate.

According to the above configuration, the terminals of the liquid crystal display are positioned by being inserted into the terminal guide holes of the light guide plate, and the operation of inserting the terminals into the LCD connector is facilitated.

According to a third aspect of the present invention, in the configuration of the first aspect, the connector-side both-end guide portions and the connector-side center guide portion are formed by guide grooves, and the light guide plate-side both end guide portions and the center guide portion are formed. , And a guide projection to be fitted into the guide groove.

According to the above configuration, the guide protrusion on the light guide plate side is fitted into the guide groove of the LCD connector, thereby achieving the LC
The positioning of the D terminal with respect to the LCD connector is performed.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an LCD terminal positioning structure according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. This positioning structure is applied to an automobile instrument, as in the above-described conventional example. The liquid crystal display 11 is housed in a concave portion 13 a formed in the light guide plate 13 and fixed by a bezel 15. I have. Although not shown, the bezel 15 is fixed to the light guide plate 13 by engaging an engagement claw provided on the bezel 15 with an engagement hole provided on the light guide plate 13 side.

A bent portion 13b which is bent downward is formed at the right end of the light guide plate 13 in FIG. 2, and the bent portion 13b is provided with a terminal 11a of the liquid crystal display 11.
Are formed in the terminal guide holes 13c into which the holes are inserted. The terminal 11a is inserted into the terminal guide hole 13c,
It protrudes below the bent portion 13b.

Both end guide projections 13d and 13e as both end guides are provided on the lower surface of both ends in the longitudinal direction of the bent portion 13b, that is, near both ends in the arrangement direction of the terminals 11a.
a is formed to protrude in the same direction as the protruding direction of a. The two-sided guide projections 13d and 13e project forward (downward in the drawing) from the terminal 11a in the projecting direction. Further, a central guide projection 13f as a central guide portion is formed at a central portion in the longitudinal direction of the bent portion 13b. The central guide protrusion 13f is formed in a plate shape that is long in the direction in which the terminals 11a are arranged, and protrudes forward (downward in the drawing) from the both-end guide protrusions 13d and 13e in the protruding direction so as to be longer in the protruding direction. . Terminal groups B and C including a plurality of terminals 11a are arranged on both sides of the central guide protrusion 13f.

On the other hand, each terminal group B,
C, LCD connectors 19 and 21 are mounted and arranged, respectively.
The terminal 11a is fitted into 9a, 21a. At both ends in the longitudinal direction of the LCD connector 19, both end guide protrusions 13d and a center guide protrusion 13f of the light guide plate 13 are respectively fitted. Center guide grooves 19c are formed. Also,
At both ends in the longitudinal direction of the LCD connector 21, both end guide projections 13e and the center guide projections 13e of the light guide plate 13 are provided.
Both ends are formed with a guide groove 21b as a connector-side guide portion and a central guide groove 21c as a connector-side center guide portion, into which f is fitted.

In the above-described LCD terminal positioning structure, when the terminal 11a of the liquid crystal display 11 is fitted into the terminal holes 19a and 21a of the LCD connectors 19 and 21, when the light guide plate 13 is brought close to the circuit board 17, FIG. As shown in the figure, first, the center guide projection 13f of the light guide plate 13 is L
Central guide grooves 19c, 21c of CD connectors 19, 21
And this central portion is positioned. further,
By pushing the light guide plate 13 toward the LCD connectors 19 and 21, the guide protrusions 13 d and 13 d at both ends of the light guide plate 13 are turned on.
e is the guide groove 19 at both ends of the LCD connectors 19 and 21.
b and 21b, and both ends are positioned.

By positioning the center portion and both end portions in the arrangement direction of the terminals 11a, the terminals 11a comprising the two terminal groups B and C are positioned with respect to the LCD connectors 19 and 21 over the entire length in the arrangement direction. By further pushing the light guide plate 13 in this state, the terminal 11a is
The D connectors 19 and 21 are securely fitted into the terminal holes 19a and 21a.

In the above-described positioning structure, the positioning portions are provided at the center and both ends along the arrangement direction of the terminals 11a. 13d, 13e, the center guide grooves 19c, 2c on the LCD connectors 19, 21 side.
Since it is fitted and positioned in 1c, deterioration in workability that occurs when the positioning portions at the center and both ends are simultaneously fitted and positioned is avoided, and the positioning work is facilitated.

As a positioning structure, a guide groove may be provided on the light guide plate 13 side, and a guide protrusion may be provided on the LCD connectors 19 and 21 side.

[0024]

As described above, according to the first aspect of the present invention, the length of the central guide portion provided in the light guide plate in the protruding direction is formed longer than the same length of both end guide portions. When positioning the terminals of the liquid crystal display fixed to the LCD connector into the LCD connector, the center guide portion is fitted into the guide portion on the LCD connector side before the guide portions on both ends, and is positioned. Deterioration in workability that occurs when the positioning portions of the portions are simultaneously positioned is avoided, and the positioning operation can be easily performed.

According to the second aspect of the present invention, since the terminals of the LCD are positioned by being inserted into the terminal guide holes of the light guide plate, the fitting operation to the LCD connector can be further facilitated.

According to the third aspect of the present invention, since the center guide projection on the light guide plate side is inserted into the guide groove on the LCD connector side before the both-end guide projections, the positioning operation of the LCD terminal with respect to the LCD connector is facilitated. It can be carried out.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an LCD terminal positioning structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an operation explanatory view showing a positioning operation by the positioning structure of FIG. 1;

FIG. 4 is a perspective view showing a conventional LCD terminal positioning structure.

FIG. 5 is a perspective view when two LCD connectors are used in the positioning structure of FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Liquid crystal display 11a Terminal 13 Light guide plate 13c Terminal guide hole 13d, 13e Both ends guide projection (central guide part) 13f Center guide projection (central guide part) 17 Circuit board 19, 21 LCD connector 19b, 21b Both ends guide groove (both ends on connector side) Guide part) 19c, 21c Central guide groove (connector side central guide part) B, C Terminal group

Claims (3)

(57) [Claims] 1. A liquid crystal display is fixed to a light guide plate for introducing and illuminating light from a light source with respect to a dial and a pointer in an instrument, and a plurality of terminals of the liquid crystal display are mounted on a circuit board. In the positioning structure of the LCD terminal when being fitted into a certain LCD connector, the LCD connector is provided with two at a predetermined interval along the arrangement direction of the plurality of terminals, and the plurality of terminals are provided on the light guide plate. Guides formed near both ends in the arrangement direction in parallel with the terminal and protruding forward from the end of the terminal; and a plurality of terminal groups B and C provided corresponding to the two LCD connectors, respectively. A center guide portion formed in the same direction as the both end guide portions is provided between the two LCD connectors. Provided on both sides in the array direction of the
A connector-side center guide portion fitted to the center guide portion is provided on a side portion of the two LCD connectors facing each other, and a length of the center guide portion of the light guide plate in a protruding direction is longer than that of both end guide portions. An LCD terminal positioning structure characterized by being formed. 2. The LC according to claim 1, wherein the terminal is inserted into a terminal guide hole formed in the light guide plate.
D terminal positioning structure. 3. The connector-side both-end guide portion and the connector-side center guide portion are formed by guide grooves, and the light guide plate-side both end guide portion and the center guide portion are formed by guide protrusions fitted into the guide grooves. 2. The structure for positioning an LCD terminal according to claim 1, wherein: