JP2018054291A - Instrument for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an instrument for vehicle that has no possibility of decreased illumination quality.SOLUTION: An instrument for vehicle comprises an information display unit 10, a circuit board 20 disposed on the side opposite to a viewer of the information display unit 10, a light source 30 mounted on the circuit board 20 so as to supply illumination light to the information display unit 10, a light guide member 40 disposed in an illumination path from the light source 30 to the information display unit 10, and a case member 50 holding the light guide member 40. A mounted component 21 is mounted in a substrate surface portion P of the circuit board 20. The case member 50 has a through hole portion 51a for positioning a front end portion 21a of the mounted component 21, and a light reflecting member 60 is disposed between the light guide member 40 and the case member 50 so as to cover the through hole portion 51a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle instrument mounted on a vehicle such as a motorcycle or an automobile.

  Conventionally, as this type of vehicle instrument, for example, the one described in Patent Document 1 below is known. The vehicle instrument described in Patent Document 1 includes an information display body composed of a liquid crystal display panel and an anti-viewer side opposite to the viewer side of the information display body (that is, the back side of the information display body). A hard circuit board to be arranged, a light source mounted (arranged) on the circuit board to supply illumination light to the information display body, and a light guide arranged in an illumination path from the light source to the information display body A member and a case member made of a resin case for holding the light guide member.

  In general, various mounting components such as a control unit including a microcomputer for controlling display of the information display body and a capacitor are mounted on the surface of the substrate on the viewer side of the circuit board.

Japanese Patent Laying-Open No. 2015-208551

  By the way, the capacitor mounted on the circuit board surface portion of the circuit board under the condition that the height dimension along the thickness direction of the empty circuit board formed between the case member and the circuit board is relatively narrow. If the height dimension (hereinafter referred to as the height dimension of the mounted component) is larger than the height dimension of the above-mentioned space, there is a possibility that a problem that the capacitor collides with the case member occurs.

In order to solve this problem, it is conceivable to provide a through hole in the case member so that the capacitor does not collide with the case member. However, if a through hole is provided in the case member, a part of the illumination light introduced into the light guide member leaks from the back surface of the light guide member located on the side opposite to the information display body side. In this case, the leakage light does not contribute as light supplied to the information display body, but leaks (passes) through the through hole to the circuit board side. Therefore, the amount of light traveling toward the information display body is reduced by the amount of the leaked light, and there is a risk that the illumination quality will deteriorate when the information display body is illuminated.
SUMMARY OF THE INVENTION Accordingly, the present invention is directed to providing a vehicle instrument that does not have a risk of deterioration in illumination quality in order to cope with the above-described problems.

  The present invention relates to an information display body, a circuit board disposed on the side opposite to the viewer side of the information display body, and the circuit board so as to supply illumination light to the information display body. A light source disposed in an illumination path extending from the light source to the information display body, a case member holding the light guide member, and a viewer side of the circuit board; In the vehicle instrument in which the mounting component is mounted on the substrate surface portion, the case member is provided with a through-hole portion for positioning a required portion of the mounting component, and the at least the through-hole portion is covered so as to cover the through-hole portion. A light reflecting member is disposed between the light guide member and the case member.

  ADVANTAGE OF THE INVENTION According to this invention, the initial objective can be achieved and the vehicle instrument which does not have a possibility that illumination quality may fall can be provided.

The front view of the meter for vehicles by the embodiment of the present invention. AA sectional drawing of FIG. The principal part expanded sectional view of the vehicle meter which shows the center vicinity in FIG.

  Hereinafter, the case where the embodiment of the present invention is applied to a vehicle instrument mounted at the center of a handle of a motorcycle will be described as an example with reference to FIGS. 1 and 2. In the following description, the viewer side viewing the vehicle instrument from the front (viewing) is defined as the front side, and the counter-viewer side opposite to the viewer side is defined as the back side.

  1 and 2, the vehicle instrument according to the present embodiment illuminates the information display 10 as an instrument display, the circuit board 20 disposed behind the information display 10 and the information display 10. A light source 30 mounted (arranged) on the circuit board 20 so as to supply light, a light guide member 40 disposed in an illumination path from the light source 30 to the information display body 10, and the light guide member 40 A holding case member 50, a light reflecting member 60 disposed between the light guide member 40 and the case member 50, and a front side housing 70 disposed so as to mainly cover the front side of the information display body 10. , And a back-side casing 80 disposed so as to mainly cover the back side of the circuit board 20.

  For example, a rectangular liquid crystal display panel can be applied to the information display body 10. In the display area of the information display body 10, a display unit 11 including, for example, vehicle speed information and travel distance information is displayed as visual information. In this case, the information display body 10 is electrically connected to the circuit board 20 using a flexible wiring board (not shown).

  The circuit board 20 is made of, for example, a hard wiring board in which a wiring pattern (not shown) is applied to a glass epoxy base material. For example, a control unit (not shown) that controls the information display body 10, a light source 30, A mounting component 21 as a circuit component including a capacitor and the like is conductively connected to the wiring pattern. In this case, the mounting component 21 and the light source 30 are mounted on the board surface portion P of the circuit board 20 on the front side of the circuit board 20.

  The light source 30 is formed of, for example, a chip-type light emitting diode that emits color as appropriate, and is mounted on the substrate surface portion P of the circuit board 20 so as to face a light receiving portion described later of the light guide member 40. In this case, the light source 30 is mounted on the board surface portion P so as to emit light along the plate surface direction of the circuit board 20. Note that the number of light sources 30 may be provided as many as necessary in accordance with the shape (area) of the light receiving unit.

  The light guide member 40 is formed in a substantially wedge shape from a translucent synthetic resin material, and includes a light receiving portion 41 provided so as to face the light emitting surface of the light source 30, an inclined portion 42, and a light emitting portion 43. Yes.

  The light receiving unit 41 is an upright wall-shaped light receiving surface that receives illumination light from the light source 30, and is formed by one side surface located on the right side in FIG. 2. The inclined portion 42 is positioned directly below the light emitting portion 43 and is held by a holding portion (described later) of the case member 50. In this case, the inclined portion 42 located on the back surface of the light guide member 40 is an upwardly inclined surface in which the plate thickness of the light guide member 40 gradually decreases from the right side to the left side in FIG. Composed. The light emitting portion 43 is configured as a flat light emitting surface provided on the front surface of the light guide member 40 so as to face the information display body 10.

  The case member 50 is a resin case formed of, for example, a white synthetic resin material, and has a holding portion 51 that is mounted on the circuit board 20 and has an inclined wall shape that holds the information display body 10 and the light guide member 40. (See FIG. 3).

  In this case, the holding portion 51 of the case member 50 is provided with a through-hole portion 51 a that penetrates the front and back of the holding portion 51 in order to avoid contact (interference) with the mounting component 21.

  The through-hole portion 51a is provided to position a required portion (tip portion) 21a of the mounting component 21 extending toward the front side (information display body 10) in the internal space of the through-hole portion 51a. is there. In addition, the shape of the through-hole part 51a should just be provided so that a contact with the mounting component 21 (tip part 21a of the mounting component 21) may be avoided, and in this case, it is comprised by the substantially rectangular through-hole shape. And

  The light reflecting member 60 is composed of, for example, a light reflecting sheet (light diffusing sheet) in which a white print layer is printed on the front and back surfaces of a light transmissive sheet, and is guided so as to completely cover (close) the through hole 51a. It is clamped between the optical member 40 and the holding part 51 (case member 50).

  The front-side housing 70 includes a see-through portion 71 formed of a light-transmitting synthetic resin material and an invisible portion 72 as an opaque portion formed of a light-blocking (for example, black) synthetic resin material. . In this case, for example, the front side housing 70 can be obtained by insert-molding the see-through part 71 into the invisible part 72.

  The see-through unit 71 is a substantially flat see-through panel provided so that the display area of the information display body 10 can be seen through from the front side, and a viewer viewing the information display body 10 displays in the display area through the see-through unit 71. The display unit 11 can be seen through (viewed).

  The invisible portion 72 includes a concealing portion that conceals the internal components such as the circuit board 20, the light guide member 40, the case member 50, and the light reflecting member 60 so as not to be seen from the viewer side.

  The back side housing 80 is made of, for example, a synthetic resin material and is formed in a substantially box shape. In this case, the rear case 80 and the front case 70 constitute an outer case of the speedometer S.

  A vehicle instrument is constituted by the above-described parts. In such a configuration, when the light source 30 is turned on, illumination light emitted from the light source 30 is introduced into the light guide member 40 through the light receiving unit 41. The illumination light introduced into the light guide member 40 travels from the right side to the left side in FIG. 2 in the light guide member 40 and reaches the inclined portion 42 located on the back surface of the light guide member 40. And most of the illumination light that has reached the inclined portion 42 is reflected light that is reflected and guided to the light emitting portion 43 side by the inclined portion 42, but a part is on the side opposite to the light emitting portion 43 side. It leaks as leakage light toward the holding unit 51 side.

  Here, in the case of the present embodiment, the holding portion 51 (case member 50) is provided with a through-hole portion 51a for positioning the tip portion 21a of the mounted component 21, and further closes (covers) the through-hole portion 51. Thus, since the light reflecting member 60 is sandwiched (arranged) between the inclined portion 42 (light guide member 40) and the holding portion 51 (case member 50), the leakage light is incident on the light reflecting member 60. The auxiliary reflected light travels toward the front side.

  That is, the leakage light (the auxiliary reflected light) is bent forward by the light reflecting member 60 and introduced again into the light guide member 40 through the inclined portion 42, and then proceeds straight upward. It reaches the light emitting part 43. Therefore, the light reaching the light emitting portion 43 (in other words, the emitted light emitted from the light emitting portion 43 toward the information display body 10) includes both the reflected light and the auxiliary reflected light. It becomes.

  That is, in the present embodiment, the leakage light that could not be contributed (effectively used) as light supplied to the information display body 10 is effectively used as the auxiliary reflected light in the present embodiment. As a result, in the present embodiment, the amount of light directed toward the information display body 10 is increased by the amount of the auxiliary reflected light as compared with the conventional case. Therefore, in order to avoid contact with the mounting component 21, the holding portion 51 (case member 50). Even if the through-hole portion 51a is provided in the above, it is possible to provide a vehicle instrument that does not have a risk of deterioration in illumination quality.

  Further, by providing the holding portion 51 with the through-hole portion 51a for positioning the tip portion 21a of the mounting component 21, the installation position of the circuit board 20 can be brought closer to the information display body 10 side. The height dimension of the vehicle instrument along the thickness direction of the substrate 20 becomes as small as possible, and the vehicle instrument can be made thinner.

  In addition, this invention is not limited by the above-mentioned embodiment and drawing. Changes (including deletion of constituent elements) can be added to the embodiments and the drawings as appropriate without departing from the scope of the present invention.

  For example, in the above-described embodiment, a circuit component such as a capacitor is applied as the mounting component 21 mounted on the substrate surface portion P, and the tip end portion 21a of the mounting component 21 is located in the through hole portion 51a. However, the mounting component 21 can employ various mounting components. As an example, a connector may be employed as the mounting component 21. Note that, when the connector is employed, although detailed illustration is omitted here, it is necessary to provide a hole in the rear-side housing 80 for penetrating the mating connector that is the mating connector.

  In the above-described embodiment, the light reflecting member 60 is provided between the inclined portion 42 and the holding portion 51 so as to close the through-hole portion 51, but covers only the through-hole portion 51 as necessary. The light reflecting member 60 may be disposed on the holding portion 51 in a state. In short, the light reflecting member 60 in the present invention may be disposed between the inclined portion 42 (light guide member 40) and the holding portion 51 (case member 51) so as to cover at least the through-hole portion 51.

DESCRIPTION OF SYMBOLS 10 Information display body 20 Circuit board 21 Mounted component 21a Tip part (required part)
DESCRIPTION OF SYMBOLS 30 Light source 40 Light guide member 41 Light receiving part 42 Inclined part 43 Light emitting part 50 Case member 51 Holding part 51a Through-hole part 60 Light reflecting member 70 Front side housing | casing 71 Transparent part 72 Invisible part 80 Back side housing | casing P Substrate surface part

Claims (1)

An information display;
A circuit board disposed on the side opposite to the viewer side of the information display body;
A light source disposed on the circuit board to supply illumination light to the information display body;
A light guide member disposed in an illumination path from the light source to the information display body;
A case member for holding the light guide member,
In the vehicle instrument in which the mounting component is mounted on the substrate surface portion on the viewer side of the circuit board
The case member is provided with a through-hole portion for positioning a required portion of the mounted component,
A vehicle instrument, wherein a light reflecting member is disposed between the light guide member and the case member so as to cover at least the through hole portion.

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