JP5322601B2 - Indicator lighting structure for automotive instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indicator illuminating structure for vehicle-use meter, capable of preventing an indicator design from emitting light weakly due to the reflected light from a land part of a circuit board. <P>SOLUTION: A light-shielding wall 22, which covers over the land part 12 in viewing the inside of a light case section 21 from an indication plate 30, is formed on one portion of the light case section 21. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an indicator illumination structure for illuminating an indicator design provided on a display board of an automotive instrument.

  FIG. 2A is a front view of a general automotive instrument, FIG. 2B is a partial cross-sectional view of part A of FIG. 2A, and FIG.

  As shown to Fig.2 (a), the indicator as shown by the code | symbol A is provided in the meter for motor vehicles, for example. Such an indicator unit includes one dedicated LED (light source) for each indicator design, and the indicator design emits light by turning on the LED.

  The illumination structure for each indicator design is generally configured as shown in FIG. In FIG.2 (b), 20 is a case of the instrument for motor vehicles, and the circuit board 10 is arrange | positioned at the back surface side. Further, a display board 30 having a translucent indicator design 31 is arranged on the surface side of the case 20.

  In addition, a dedicated LED (light source) L <b> 1 for illuminating the indicator design 31 from the back side is disposed on the circuit board 10, just behind the indicator design 31. The LED L <b> 1 is mounted on the circuit board 10 by soldering terminals to the land portions 12 of the circuit board 10.

  In addition, a cylindrical light case portion 21 is provided on the back surface of the case 20 so as to surround an illumination space from the LED L 1 to the indicator design 31. The light R1 from the LED L2 (other light source) is blocked.

  In this illumination structure, by turning on the LED L1 dedicated to the indicator design 31, the indicator design 31 can be illuminated from behind by the light of the LEDL1, and the indicator design 31 can be caused to emit light.

An example of this type of indicator illumination structure is disclosed in Patent Document 1, for example.
JP 2006-3261 A

  By the way, as shown in FIG. 2B, a slight gap 23 may be opened between the circuit board 10 and the light case portion 21, and light from the adjacent LED L2 and the like (others) When the light R1 of the light source enters the light case portion 21 and hits the land portion 12 in the light case portion 21, it may be reflected by the land portion 12 and proceed in the direction of the indicator design 31. Then, as shown in FIG. 2C, the land portion 12 can be seen from the indicator design 31 side. Therefore, although the dedicated LED L1 is turned off, the land portion 12 leaks from the gap 23. The indicator design 31 may emit light thinly due to the light R2 reflected by the light, and the appearance of the indicator design 31 may be deteriorated, and the content of the instruction may be misidentified.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an automobile capable of preventing the indicator design from being thinly emitted by reflected light from a land portion of a circuit board on which a light source is soldered. An object is to provide an indicator lighting structure for an instrument.

In order to achieve the above-described object, an indicator lighting structure for an automotive instrument according to the present invention is characterized by the following (1).
(1) a circuit board;
A light source disposed on the circuit board by being soldered to a land portion of the circuit board;
A display plate having a transparent indicator design, disposed in front of the light source in the irradiation direction; and a cylindrical light case portion formed so as to surround an illumination space between the light source and the display plate; And a case of an automotive instrument that houses the circuit board therein,
With
A part of the light case part is formed with a light shielding wall that covers the land part when the inside of the light case part is viewed from the display board.
about.

  According to the indicator illumination structure having the above configuration (1), the light from the other light source enters the gap between the case and the circuit board and is reflected by the land portion by the action of the light shielding wall provided in the light case portion. However, since the reflected light can be blocked so as not to reach the indicator design of the display board, it is possible to prevent the indicator design from being lightly emitted due to light leakage.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that an indicator design light-emits thinly by the influence of the light leakage from another light source, and can eliminate the possibility of the deterioration of appearance and the misrecognition of instruction content.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

Fig.1 (a) is sectional drawing of the indicator lighting structure of embodiment, (b) is Ib arrow line view of (a).
As shown in FIG. 1A, in this embodiment, the circuit board 10 is arranged on the back surface side of the case 20, and the display board 30 having the translucent indicator design 31 is arranged on the front surface side of the case 20. Has been. In addition, a dedicated LED (light source) L <b> 1 that illuminates the indicator design 31 from the back side is disposed on the circuit board 10, just behind the indicator design 31. The LED L <b> 1 is mounted on the circuit board 10 by soldering terminals to the land portions 12 of the circuit board 10.

  In addition, a cylindrical light case portion 21 is provided on the back surface of the case 20 so as to surround an illumination space from the LED L1 to the indicator design 31, and the light case portion 21 allows the LED L2 outside the light case portion 21 to be The light R1 is blocked. The cylindrical light case portion 21 has an expanded shape that gradually expands from the LED L <b> 1 toward the display panel 30.

  And in this embodiment, when seeing the back part of the light case 21 from the indicator design 31 side to a part of surrounding wall of the light case part 21, as shown in FIG.1 (b), LEDL1 is soldered. A light shielding wall 22 that blocks the reflected light R <b> 2 from the land portion 12 to the indicator design 31 is provided so as to cover the land portion 12. Since it is sufficient to provide the light shielding wall 22 only on the side where light may leak, in this embodiment, the light shielding wall 22 is provided so as to cover only one of the land portions 12. In this case, the light shielding wall 22 may be provided as a protruding wall protruding from the peripheral wall of the light case 21 as shown by a solid line, or may be provided as an extension of the inclined surface 21 a of the peripheral wall of the light case portion 21. Good. When the light shielding wall 22 is provided as an extension of the inclined surface 21a, the inner surface of the light case 21 need not be stepped.

  In this way, the light shielding wall 22 provided in the light case portion 21 causes the light R1 of another light source (such as LED L2) to enter from the gap 23 between the case 20 and the circuit board 10 and be reflected by the land portion 12. Even so, the reflected light R <b> 2 can be blocked from reaching the indicator design 31 of the display panel 30. Therefore, it is possible to prevent the indicator design 31 from emitting light thinly due to the light leaking from the other though the dedicated LED L1 is turned off, and to eliminate the possibility of misrecognizing the instruction content. it can.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

(A) is sectional drawing of the indicator illumination structure of embodiment of this invention, (b) is Ib arrow line view of (a). (A) is a front view of a general automobile meter, (b) is a partial cross-sectional view of part A of (a), and (c) is a view taken along the arrow IIc in (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Circuit board 12 Land part 20 Case 21 Light case part 21a Inclined surface 22 Light-shielding wall 30 Display board 31 Indicator design L1 LED (light source)

Claims (1)

A circuit board;
A light source disposed on the circuit board by being soldered to a land portion of the circuit board;
A display plate having a transparent indicator design, disposed in front of the light source in the irradiation direction, and a cylindrical light case portion formed so as to surround an illumination space between the light source and the display plate; And a case of an automotive instrument that houses the circuit board therein,
With
A part of the light case part is formed with a light shielding wall that covers the land part when the inside of the light case part is viewed from the display board.
An indicator lighting structure for an automotive instrument characterized by the above.

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