JP4218642B2 - Instrument - Google Patents

Description

  The present invention relates to an instrument mounted on a vehicle.

  2. Description of the Related Art Conventionally, an automobile instrument in which a light guide member having a ring shape and a triangular cross section is installed on an outer edge portion of a scale board formed of a transparent resin has been proposed (see, for example, Patent Document 1). .

In such an instrument, the light guide member is affixed to the scale plate, and when light is emitted from the light source disposed on the back surface of the scale plate, the light transmitted through the scale plate is inside the light guide member. And is reflected by the end face of the light guide member and guided to the scale of the dial. Thereby, light emission of a light guide member and the outstanding display of a scale display part can combine, and can provide a novel appearance.
JP 2002-5697 A

  However, in the above-described conventional technology, the scale plate and the light guide member are in a state of being adhered so as to be in close contact with the outer edge portion of the scale plate, so that the adhesive surface between the light guide member and the scale plate functions as a mirror. Resulting in. Thus, when the user looks into the light guide member, the member reflected in the mirror is visible, which is not preferable as the appearance of the instrument.

  In addition, although a scale board is a transparent member, the diffusion process is given to the back surface of the outer edge part. This prevents the light source inside the meter from being seen, but depending on the angle at which the user looks into the meter, the inside of the meter may be visible.

  In view of the above points, an object of the present invention is to prevent a member of an instrument from being reflected on an adhesive surface between a light guide member and a scale plate, and to improve the appearance of the instrument.

In order to achieve the above object, according to the first aspect of the present invention, when light is emitted from the light source (40), the light is emitted from a scale (22) provided on the outer edge of the disc-shaped display board (10, 20). ) Is further transmitted through the outer edge side, reflected by the reflecting surface (51) of the lighting member (30, 50), and guided to the inside of the lighting member from the light incident surface (33) facing the reflecting surface. The light incident surface of the illumination member is subjected to diffusion treatment, and the illumination member includes a reflective member (50) having a reflective surface and a light guide member (30) having a light incident surface. The light guide member has a bottom surface (31) facing the scale of the display panel, and light incident from the light incident surface is guided to the bottom surface. In the light guide member, the light guide member is formed on a surface facing the corner of the inner periphery .

  Thus, the illumination member provided with the reflective surface and the light incident surface is disposed on the outer edge of the display panel. Thereby, since the illumination member and the display panel are not in contact, the contact portion can be prevented from becoming a mirror, and the user who has looked into the illumination member can not see the member inside the instrument. it can.

  Further, the light from the light source that has passed through the outer edge of the display panel is reflected by the reflecting surface and is incident on the light incident surface. Thereby, since an illuminating member shines in a ring shape, the appearance as an instrument can be improved.

Further , even if the user looks into the illumination member, since the diffusion surface is subjected to the diffusion treatment, it is possible to prevent the inside of the instrument from being seen through the light entrance surface.

And an illuminating member is comprised by a reflection member and a light guide member as a different body. Thereby, the complicated structure of an illuminating member, especially the reflective member and light guide member which formed the reflective surface and the light-incident surface accurately can be employed.

In the second aspect of the present invention, at least the reflective surface of the reflective member is colored, and the outer edge of the display panel is colored in the same color as the color of the reflective member. It is characterized by having.

  According to this, the light emitted from the light source is first colored at the outer edge portion of the display panel, and is second colored when reflected by the reflecting surface of the reflecting member. Thus, by coloring the light of the light source in two stages, the color of the ring-shaped light guide member can be made uniform brightness.

In a third aspect of the present invention, the light incident surface of the light guide member has a shape that guides light incident from the light incident surface to the inner edge side of the light guide member. Thereby, the inner edge side of a ring-shaped light guide member can be illuminated more brightly.

The invention according to claim 4 is characterized in that the bottom surface is subjected to a diffusion treatment so that the surface becomes rougher toward the inner edge side.

  Thereby, the light guide | induced to the bottom face inside a light guide member is scattered toward the inner edge side of a light guide member. Thereby, a gradation can be provided in the brightness of light from an outer periphery to an inner edge side in a ring-shaped light guide member. Thereby, the light of a scale and the light of a light guide member can be prevented from overlapping, and the visibility of a scale can be ensured.

In the invention according to claim 5 , the display board is configured to include a disk-shaped dial (10) and a ring-shaped dial (20) provided with a scale, The step (21) provided at the outer edge of the dial is positioned on the driver's seat side with respect to the dial, and the light guide member is disposed on the driver's seat side with respect to the dial .
In this way, the scale plate is arranged on the driver's seat side with respect to the dial, and the light guide member is further arranged on the driver's seat side than the scale plate. As a result, when light is introduced into the light guide member, the contrast between the illumination of the light guide member and the dial becomes clear, and the ring-shaped light guide member can appear to appear on the dial. . In this way, a three-dimensional effect and a floating feeling can be produced.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a meter according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 3 is an enlarged cross-sectional view of a portion B in FIG.

  As shown in FIGS. 1 and 2, the instrument has a disk-shaped dial 10 made of transparent resin. On the surface (driver's side) of the dial 10, for example, the vehicle speed is a number. It is drawn. A coloring process (not shown) is performed on the outer edge portion of the dial 10, and when light passes through the outer edge portion of the dial 10, the light is colored in the color of the outer edge portion. In addition, this coloring process is set to the density | concentration which can permeate | transmit light through the outer edge part of the dial 10, for example, blue is employ | adopted.

  A ring-shaped scale board 20 is installed on the outer edge of the dial 10. The scale plate 20 is fixed by a step 21 provided to the dial 10 so as to protrude from the dial 10 toward the driver's seat. Furthermore, the scale 22 is transparent in the scale board 10, and when the scale board 20 is irradiated with light, the scale 22 appears to shine due to light leaking from the scale 22. The dial 10 and the scale board 20 correspond to the display board of the present invention.

  As shown in FIG. 2, a ring-shaped light guide member 30 formed of a resin (for example, acrylic) is disposed on the scale plate 20. In the light guide member 30, the bottom surface 31 facing the scale plate 20 is a surface parallel to the surface of the scale plate 20, and is subjected to a diffusion treatment so that the surface becomes rougher toward the inner peripheral side. Hereinafter, the bottom surface 31 is referred to as a diffusion surface 31. When light is incident on the diffusion surface 31, the light is scattered and looks bright.

  On the other hand, in the light guide member 30, the surface facing the diffusion surface 31 is an inclined surface 32 that is inclined toward the center of the dial 10.

  In the light guide member 30, a light incident surface 33 that introduces light guided from the light source 40 and the reflection member 50 described later into the light guide member 30 is formed on the surface facing the corner of the inner periphery. The light incident surface 33 guides light introduced into the light guide member 30 to the inner edge side of the light guide member 30. Thereby, the inner edge side of the ring-shaped light guide member 30 can be illuminated more brightly.

  Further, the light incident surface 33 of the light guide member 30 is subjected to diffusion processing (for example, wrinkles). As a result, even if the user looks into the light guide member 30, the internal structure of the instrument cannot be seen due to the diffusion process performed on the light incident surface 30.

  A printed wiring board 60 is disposed on the back side of the dial 10, and a light source 40 that illuminates the dial 10 and the dial 20 is fixed on the printed wiring board 60. For example, a light emitting diode is employed as the light source 40. The light emitted from the light source 40 passes through the back side of the dial 10 and the outer edge of the dial 10 and is guided to the front side of the dial 10.

  Note that a unit for driving the pointer 61, an electric circuit, wiring, and the like are built in the printed wiring board 60.

  On the surface of the dial 10, a reflecting member 50 that guides the light of the light source 40 that has passed through the outer edge of the dial 10 to the center side of the dial 10 is provided. The reflecting member 50 is made of, for example, resin and has a reflecting surface 51 that reflects light. The reflecting member 50 has the same color as the outer edge of the dial 10. The same color system means that, for example, if the outer edge portion of the dial 10 is blue, the reflecting member 50 is also blue, and if the outer edge portion of the dial 10 is green, the reflecting member 50 is also green. The light guide member 30 and the reflection member 50 correspond to the illumination member of the present invention. The above is the configuration of the instrument according to the present embodiment.

  Next, the operation of the light guide member 30 in the meter shown in FIG. 1 will be described with reference to FIGS.

  First, when light is emitted from the light source 40 on the back side of the dial 10, this light is applied to the back side of the dial 10 and the characters on the dial 10 are applied. Further, the light transmitted through the portion of the dial 10 facing the ring-shaped dial 20 is irradiated on the scale 22 of the dial 20. Thereby, the dial 10 and the scale 22 of the scale board 20 shine with the color of the light emitted from the light source 40.

  Further, the light emitted from the light source 40 passes through the outer edge of the dial 10 and is guided to the surface side of the dial 10. As shown in FIG. 3, the light transmitted through the outer edge of the dial 10 is reflected by the reflection surface 51 of the reflection member 50 and is incident on the light incident surface 33 of the light guide member 30.

  The light from the light source 40 is colored first when passing through the outer edge of the dial 10, and is colored second when reflected by the reflecting surface 51 of the reflecting member 50. That is, the light of the light source 40 is guided in the light guide member 30 after being colored in two stages. In this way, by performing the two-stage coloring on the light of the light source 40, it is possible to add brightness to the color between the light sources 40 fixed not only in the vicinity of the light source 40 but also on the outer edge portion of the dial. Therefore, the color of the light guide member 30 can be made uniform brightness.

  The light guided from the light incident surface 33 of the light guide member 30 to the inside of the light guide member 30 is reflected by the inclined surface 32 of the light guide member 30 and guided to the diffusion surface 31. Then, the light is scattered by the diffusing surface 31, and the diffusing surface 31 shines in a color colored on the outer edge portion of the dial 10 and the reflecting member 50. Thus, when light is scattered by the diffusion surface 31 of the light guide member 30, the inner edge side of the light guide member 30 shown in FIG. Thereby, the presence of a ring that shines along the scale 22 of the scale board 20 becomes clear.

  At this time, when the light guide member 30 shines above the scale 22 of the scale plate 20 in the light guide member 30, the light of the scale 22 and the light of the light guide member 30 overlap, and the scale 22 looks blurred. there is a possibility. Therefore, the diffusion surface 31 of the light guide member 30 is formed roughly from the outer periphery to the inner periphery side of the light guide member 30. Thereby, in the ring-shaped light guide member 30, a gradation is formed in which the brightness of the color decreases from the inner periphery to the outer periphery. In this way, while clarifying the presence of the ring that appears when the light guide member 30 shines, the light of the ring and the light of the scale 22 of the scale board 20 can be prevented from overlapping, and the visibility of the scale 22 can be ensured. .

  Further, the scale plate 20 is fixed at a position away from the dial 10 by the step 21, and the light guide member 30 is further disposed on the top of the scale plate 20. Due to the height relationship between the dial 10 and the light guide member 30, when light is guided into the light guide member 30 and the light guide member 30 shines in a ring shape, the light of the light guide member 30 and the dial The contrast with the surface of 10 becomes clear, and the ring that appears when the light guide member 30 shines emerges on the dial 10. Thereby, a stereoscopic effect and a floating feeling can be given to the user.

  Further, even if the user looks into the light guide member 30, the reflection member 50 is attached to the outer edge side of the light guide member 30. The user sees the reflecting member 50 through the light incident surface 33 with the diffusing surface 31 as a mirror, and the user can be prevented from showing the internal structure. Further, when the light entrance member 30 is viewed through the light incident surface 33, the light entrance surface 33 is subjected to diffusion treatment so that the user who has looked into the light guide member 30 does not show the internal structure of the instrument. Can be.

  As described above, in the present embodiment, the reflecting member 50 having the reflecting surface 51 and the light guide member 30 having the light incident surface 33 are separately arranged at positions away from the surface of the dial 10. A user who looks into the light guide member 30 can only see the light incident surface 33 of the light guide member 30 and the reflection surface 51 of the reflection member 50. In this way, the internal structure of the instrument can be hidden.

  As described above, the reflecting member 50 and the light guide member 30 are configured separately. Thereby, it is possible to provide an instrument using the complicated structure of the reflecting member 50 and the light guide member 30, in particular, the reflecting member 50 and the light guide member 30 in which the reflecting surface 51 and the light incident surface 33 are accurately formed.

(Other embodiments)
In the first embodiment, the instrument that displays the speed of the vehicle as a guide has been described, but the same applies to an instrument that displays other parameters such as the engine speed.

  In the first embodiment, the light guide member 30 and the reflection member 50 are prepared separately. However, a structure in which the light guide member 30 and the reflection member 50 are integrated may be employed.

  In the first embodiment, in the light guide member 30, the light introduced from the light incident surface 33 is reflected by the inclined surface 32 and is guided to the diffusion surface 31. It may be guided directly to the diffusing surface 31.

It is a front view of the meter which concerns on 1st Embodiment of this invention. It is AA sectional drawing of FIG. It is an expanded sectional view of the B section of FIG.

Explanation of symbols

10 ... Dial, 20 ... Scale plate, 22 ... Scale, 30 ... Light guide member, 31 ... Diffusion surface,
32 ... Inclined surface, 33 ... Light incident surface, 40 ... Light source, 50 ... Reflective member, 51 ... Reflective surface.

Claims (5)

A display board (10, 20) provided with a scale (22) on a disc-shaped outer edge;
A reflective surface (51) that is provided at a position farther toward the driver's seat than the display panel, and faces the outer edge of the scale on the display panel, and a light incident surface (33) that faces the reflective surface A ring-shaped illumination member (30, 50) having
A light source (40) disposed on the display panel opposite to the reflecting surface of the illumination member,
When light is emitted from the light source, the light passes through the outer edge side of the scale on the display panel, is reflected by the reflecting surface of the lighting member, and is guided from the light incident surface to the inside of the lighting member. It has come to be ,
The light incident surface of the illumination member is subjected to a diffusion treatment,
The illumination member includes a reflection member (50) having the reflection surface, and a light guide member (30) having the light incident surface.
The light guide member has a bottom surface (31) facing the scale of the display panel, and light incident from the light incident surface is guided to the bottom surface.
further,
The instrument is characterized in that the light incident surface is formed on a surface of the light guide member that faces an inner peripheral corner . In the reflective member, at least the reflective surface is colored, and the outer edge of the display panel is colored in the same color as the colored color of the reflective member. The instrument according to claim 1 . The light incident surface of the light guide member is an instrument according to claim 1 or 2, characterized in that it is shaped for guiding the light incident from the light incident surface to the inner edge side of the light guide member. The instrument according to any one of claims 1 to 3 , wherein the bottom surface is subjected to a diffusion treatment so that the surface becomes rougher toward the inner edge side. The display board comprises a disk-shaped dial (10) and a ring-shaped dial (20) provided with the scale,
The dial is located closer to the driver's seat than the dial due to a step (21) provided on the outer edge of the dial, and the light guide member is disposed closer to the driver's seat than the dial. The instrument according to any one of claims 1 to 4 , wherein the instrument is provided.

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