JP2582927Y2 - Dimming structure of pointer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dimming structure of a self-luminous type pointer.

[0002]

2. Description of the Related Art FIGS. 5 to 9 show known guides of this kind. That is, the pointer 1 is integrally formed of a transparent resin that transmits light, and a part of the light incident on the light receiving surface 2 on the rear surface side is transmitted from the reflective surfaces 3 and 3 to the front surface side. A part of the light is dispersed in the horizontal direction through the reflection surfaces 3, thereby illuminating the whole with uniform brightness. The reflection surface 3 is formed by a side surface forming a triangular space. On the back surface of the hands 1, a back surface printing 4 of a non-transparent color or a reflected light color (silver) is made.

The hands 1 configured as described above are arranged on the front side of the dial 11 and are driven to rotate about a rotary drive shaft 12. And the light receiving surface 2
The light guided by the light guide plate 13 is incident thereon. Further, as shown in FIG. 9, the pointer 1 is provided with a circular cover 5 that covers the light receiving surface 2 and the drive shaft 12. The front side of the dial 11 is provided with a front side print 14.

[0004]

In the conventional light control structure of the pointer, the light incident on the front end of the reflection surface 3 is concentrated by refraction or the like.
Let a be the leading end of a, b be the central part corresponding to the reflecting surfaces 3, 3 and d be the rear end of the pointer 1, and be the boundary e1 between the leading end a and the central part b, the central part b and the rear end. There is a problem in that a band E of light having particularly large luminance is generated at a boundary e2 with d, and the brightness becomes non-uniform.

The present invention has been made to solve the above-mentioned problem, and an object of the invention is to provide a pointer dimming structure capable of preventing generation of a band of light and illuminating with uniform brightness. It is in.

[0006]

In order to achieve the above object, the present invention has a light receiving surface on a back surface side, and a reflection device for distributing a part of light transmitted from the light receiving surface to the front surface side in a lateral direction. A light control structure of a pointer having a surface, wherein a convex portion or a concave portion is provided on the light receiving surface corresponding to a front end of the reflective surface ,
It is characterized in that a light-shielding means is provided in the convex portion or the concave portion . Then, before Symbol shielding means it is preferably formed by hot stamp printing.

[0007]

In the light control structure of the pointer constructed as described above, the amount of light reaching the front end of the reflecting surface is reduced by the light shielding means provided on the light receiving surface. For this reason, even if light concentrates at the front end of the reflection surface due to refraction or the like, the brightness of this end does not become brighter than other portions. Therefore, the brightness of the pointer becomes substantially uniform.

Furthermore, by Rukoto provided a light shielding means to the convex portion or concave portion of the receiving surface, the projections or recesses, the position of the light blocking means is more accurate, precise decrease the quantity of the end of the surface side of the reflecting surface Can be done. Therefore, it is possible to prevent a problem that the light amount is reduced to other portions of the pointer.

Further, when the light shielding means is formed by hot stamp printing, the light shielding means can be easily formed. Further, the Rukoto provided a hot stamp projections or recesses, it is eliminated variations in strain or dimension of the outer circumferential line serving as a parting line of the hot stamp printing, reduces precisely the quantity of the end portion of the surface side of the reflecting surface be able to.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. However, components common to those shown in FIGS. 5 to 9 are denoted by the same reference numerals, and description thereof will be simplified.

First, a first embodiment of the present invention will be described with reference to FIGS. Guideline 1 of this embodiment is shown in FIGS.
The difference from the pointer 1 shown in FIG. 9 is that the light receiving surface 2 corresponding to the front end of each reflecting surface 3 is provided with convex portions 2a, 2a, and each convex portion 2a is provided with a light shielding means 5. is there. Convex part 2a,
2a is formed integrally when the pointer 1 is molded with a transparent resin, and its position with respect to each reflecting surface 3 is extremely accurate. The light shielding means 5 is formed by hot stamp printing, and is formed by, for example, printing of the same reflected light color as the back side printing 4.

In the dimming structure of the pointer configured as described above, the light guided from the light guide plate 13 enters the pointer 1 from the light receiving surface 2, and a part of the light passes through the reflection surfaces 3 and 3. And a part of the light is reflected by the reflecting surfaces 3 and 3 and dispersed to the front end portion a and the rear end portion d in the lateral direction. As a result, the front end a, the center b, and the rear end d have substantially the same brightness. Moreover, since the amount of light reaching the ends of the reflecting surfaces 3, 3 on the surface side is reduced by the light shielding means 5, each of the reflecting surfaces 3, 3
Even if light is concentrated by the end on the surface side of
e2 does not become brighter than other parts.

Therefore, according to the dimming structure of the hands configured as described above, no light is generated at the boundaries e1 and e2, and the brightness of the hands 1 becomes uniform. Moreover, since the light shielding means 5 is provided on the convex portion 2a of the light receiving surface 2, the light shielding position and the light shielding area may change even if the outer peripheral line serving as the parting line for hot stamp printing is distorted or has a variation in dimensions. Absent. Therefore, each reflecting surface 3 ,
The amount of light at the front end of the hand 3 can be accurately reduced, and there is no danger that the brightness of the hand 1 will be non-uniform because other parts of the hand 1 are shielded from light. In addition, since the light-shielding means 5 can be formed in the step of performing the printing of the back surface 4 of the pointer 1, there is no possibility that the manufacturing cost increases.

Next, a second embodiment of the present invention will be described with reference to FIGS. This embodiment differs from the first embodiment in that the convex portion 2a of the light receiving surface 2 is a concave portion 2b. The recess 2b is also formed at the same time when the pointer 1 is formed.

The light control structure of the pointer having the above-described structure also has the same operation and effect as those of the first embodiment.

In each of the above embodiments, the pointer 1 is configured to illuminate the entirety of the distal end portion a, the central portion b, and the rear end portion d. Needless to say, only the central portion b may be illuminated, or only the tip portion a may be illuminated.

[0017]

According to the present invention, the amount of light reaching the front end of the reflection surface can be reduced by the light shielding means provided on the light receiving surface, so that light is emitted at the front end of the reflection surface. Even if concentrated, this end will not be brighter than the rest. Therefore, the pointer can be illuminated with substantially uniform brightness.

Furthermore, by Rukoto provided a light shielding means to the convex portion or concave portion of the receiving surface, the projections or recesses, the position of the light blocking means is more accurate, precise decrease the quantity of the end of the surface side of the reflecting surface Can be done. Therefore, the brightness of the pointer does not become non-uniform by reducing the amount of light to an unnecessary part.

In the case where the light shielding means is formed by hot stamp printing, the light shielding means can be easily formed. Further, the Rukoto provided a hot stamp printing on projections or recesses, is eliminated variations in strain or dimension of the outer circumferential line serving as a parting line of the hot stamp printing, the amount of the end surface side of the reflecting surface accurately reduced Can be done.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a light control structure of a pointer shown as a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the light control structure of the pointer as viewed from the back side.

FIG. 3 is a sectional view of a main part of a light control structure of a pointer shown as a second embodiment of the invention.

FIG. 4 is a perspective view of a main part of the light control structure of the pointer as viewed from the back side.

FIG. 5 is a cross-sectional view of a light control structure of a pointer shown as a conventional example.

FIG. 6 is a plan view of the light control structure of the pointer.

FIG. 7 is a perspective view of a light control structure of the pointer.

FIG. 8 is a perspective view of the dimming structure of the pointer as viewed from the back side.

FIG. 9 is a perspective view of a light control structure of the pointer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pointer 2 light receiving surface 2 a convex portion 2 b concave portion 3 reflecting surface 5 light shielding

Claims (3)

(57) [Scope of request for utility model registration] 1. A light control structure for a pointer having a light receiving surface on a back surface side and a reflecting surface for distributing a part of light transmitted from the light receiving surface to the front surface side in a lateral direction, Convex part on the light receiving surface corresponding to the end on the front side
The light control structure of the pointer is characterized in that a light-shielding means is provided on the convex portion . 2. A light-receiving surface on the back surface side, from which light-receiving surface
A reflective surface that disperses part of the light transmitted to the front side in the horizontal direction
A dimming structure guidelines having, a concave portion is provided on the light receiving surface corresponding to the end portion of the front surface side of the reflecting surface, you characterized in that a shielding means in the recess
Dimming the structure of the guidelines. Wherein the light blocking means according to claim 1 or dimming structure guidelines claim 2 Symbol mounting, characterized in that those formed by hot stamp printing.