JP3446995B2 - Finger needle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer in a pointer illuminating device attached to an instrument such as a vehicle, an aircraft, a ship.

[0002]

2. Description of the Related Art Conventionally, in vehicles, aircrafts, ships, and the like, a large number of instruments for displaying measured values such as speed, engine speed, mileage, and remaining fuel amount are mounted. Many things are used,
Some of these are equipped with a self-luminous pointer illumination device.

FIG. 3 is a sectional view showing a main part of a conventional self-luminous pointer illuminating device, and FIG. 4 is a side view of the pointer. FIG. 5 is a perspective view of a conventional pointer having a constant flat surface as a reflecting surface, and FIG. 6 is an explanatory view showing reflection of light in the conventional pointer.
(A) is explanatory drawing which shows the reflection in the X cross section of the pointer, (b) is explanatory drawing which shows the reflection in the Y cross section. FIG. 7 is a perspective view of a conventional pointer having a reflecting surface formed of a curved surface, and FIG. 8 is an explanatory view showing how light is condensed in the conventional pointer, and FIG. It is explanatory drawing which shows the condensing in the X cross section of the pointer, (b) is
It is explanatory drawing which shows the condensing in the Y cross section.

In FIG. 3, 11 is an internal unit. 12,
Reference numeral 12 is a light bulb provided as a light source provided with the internal unit 11 sandwiched therebetween, and 13 is a light guide plate formed of a transparent resin that guides the light L from the light bulb 12. The light guide plate 13 is disposed on the upper side of the inner unit 11, and both ends of the light guide plate 13 face the light bulb 12.

Inside the through hole 13a of the light guide plate 13, the internal unit 1
A rotary shaft 11a protruding upward from the front surface 1 faces the through-hole 13a, and the guided light L is guided around the through hole 13a.
In order to reflect to the lower surface of the pointer shaft portion 16b of
A reflecting surface 13b inclined at 5 degrees is provided.

Reference numeral 14 is a dial plate disposed above the light guide plate 13, and the dial plate 14 is provided with a through hole that engages with the light guide plate 13. 15 is a cap. The tip of the rotary shaft 11a is press-fitted into a boss 15a extending from the ceiling of the cap 15. Reference numeral 16 is a pointer made of a material having a good light guiding property, and the boss 15a is press-fitted into the pointer shaft portion 16b at the base end of the pointer 16 so that the pointer portion 16c extending from the pointer shaft portion 16b in the radial direction is ,
It projects from the cap 15 and is located above the letter plate 14. The pointer shaft portion 16b has a reflecting surface 13b of the light guide plate 13.
A reflection surface 16a is formed to reflect the light L emitted from the pointer 16c to the pointer portion 16c. Reference numeral 17 denotes a hot stamp layer formed on the lower surface of the pointer portion 16c and colored in orange, red or the like.

In the conventional pointer illuminating device having such a structure, the light L from the light bulb enters the light guide plate 13 from both ends of the light guide plate 13 and is repeatedly reflected to reach the reflection surface 13b. The light is reflected by 13 b and emitted from the light guide plate 13. Then, the transmitted light L is transmitted to the pointer shaft portion 16
The reflecting surface 1 of the pointer 16 is incident on the pointer 16 from the lower surface of b.
The light is reflected at 6a, goes through the pointer portion 16c, and goes to the hot stamp layer 17. Light L reaching hot stamp layer 17
Diffuses there and causes the pointer portion 16c to shine in a color such as orange or red.

The pointer 16 in the conventional pointer illuminator is
It is shown in FIG. The reflecting surface 1 of the conventional pointer 16
6a shows the pointer 1 from the lower surface of the pointer shaft portion 16b in a side view.
The light L that has entered 6 is reflected by the reflecting surface 16a of the pointer 16,
The light L1 reflected in the vicinity of the upper end of the reflection surface 16a travels farther than the pointer 16c so that the hot stamp layer 17 is effectively irradiated to the hot stamp layer 17 and is uniformly irradiated. Light L reflected near the lower end of surface 16a
2 is provided at an angle θ with respect to the pointer axis so as to move closer to the pointer portion 16c.

The structure of such a conventional pointer 16 is shown in FIG.
And FIG. 7 respectively. That is, in the pointer 16-1 shown in FIG. 5, the reflecting surface 16-1a is formed by a constant plane and is inclined at an angle of 45 degrees with respect to the pointer axis. Further, in the pointer 16-2 shown in FIG. 7, the reflecting surface 16-2a is formed by a concentric curved surface.

[0010]

With the conventional pointer 16-1 shown in FIG. 5, when viewed from the top, the incident light is
It is configured to be reflected by the reflecting surface 16-1a and proceed in parallel to the tip. Therefore, the light L reflected by the reflecting surface 16-1a is reflected by the side surface of the pointer 16-1 as shown in FIGS. There was a problem that it leaked to the outside and was attenuated.

In order to avoid such a problem, in the conventional pointer 16-2 shown in FIG. 7, the reflecting surface 16-2a is formed into a concentric curved surface, that is, R is attached to the pointer 16-2a.
The light is distributed so that it is reflected in the direction of the central axis of. However, in such a conventional pointer 16-2, the reflective surface 1
Since 6-2a is formed by concentric curved surfaces, the curvature of the curved surface becomes large in the vicinity X of the upper portion of the reflecting surface, and the curvature of the curved surface becomes small in the vicinity Y of the lower portion of the reflecting surface. Become. Therefore, as shown in FIGS. 8A and 8B, when viewed in a top view, the light that is originally reflected far away, that is, the light in the vicinity X of the upper part of the reflection surface is condensed near. In addition, the light to be condensed in the vicinity, that is, the light in the vicinity of the lower portion Y of the reflection surface is condensed at a distance, and as a result, the light taken into the pointer can be uniformly and efficiently radiated. There was a problem that I could not.

The present invention aims to solve such problems. That is, an object of the present invention is to provide a guideline capable of making captured light uniform and efficient.

[0013]

In order to achieve the above object, the present invention provides a pointer having a reflecting surface composed of a curved surface, including: (a) the reflecting surface introduced from the light source through the lower surface of the pointer shaft portion. The reflective surface is angled in accordance with the shape of the hot stamp surface or the printing surface so that the reflected light reflected by is directly directed to the hot stamp surface or the printing surface provided under the pointer, (b) In the vicinity of the upper part, the reflecting surface is a curved surface having a small curvature so as to collect light at a distance, and in the vicinity of the lower part thereof is a curved surface having a large curvature, and
It is characterized in that the curved surface with a small curvature is continuously changed from the curved surface with a large curvature from the vicinity of the upper portion to the vicinity of the lower portion.

The second aspect of the present invention is characterized in that the angle of the reflecting surface is set so that the light uniformly strikes the lower surface of the pointer.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a pointer showing an embodiment of the present invention, and FIG. 2 is an explanatory view showing reflection of light within the pointer of the present invention. ) Is an explanatory view showing reflection at the X cross section of the pointer, (b)
[Fig. 6] is an explanatory view showing reflection of the pointer on a Y cross section.

6 is a guideline of the present invention. The pointer 6 has a pointer shaft portion 6b at its base end, and from the pointer shaft portion 6b,
A pointer portion 6c extending in the radial direction is formed. The pointer shaft portion 6b receives light from the reflecting surface of the light guide plate 6c.
A reflecting surface 6a that reflects light is formed. Reference numeral 7 is a hot stamp layer or a printing surface formed on the lower surface of the pointer portion 6c and colored in orange, red, or the like.

The pointer 6 of the present invention is a reflecting surface 6 having a curved surface.
a. A curved surface with a small curvature is formed in the vicinity X of the upper part of the reflecting surface 6a so as to collect light at a distant position, and a curved surface with a large curvature is formed in the vicinity of the lower part Y of the reflection surface 6a so as to collect light nearby. There is. And the reflective surface 6a is
From the upper vicinity X to the lower vicinity Y, the curved surface having a small curvature is continuously changed to the curved surface having a large curvature.

The angle of the reflecting surface 6a is adjusted according to the shape of the hot stamp surface or the printing surface 7 so that the reflected light in the side view directly goes to the hot stamp surface or the printing surface 7 provided below the pointer 6. It is attached. Such a reflecting surface 6a
The angle is, for example, 45 degrees with respect to the pointer axis.

[0020]

EFFECT OF THE INVENTION Provided is a guideline capable of making captured light uniform and efficient.

[Brief description of drawings]

FIG. 1 is a perspective view of a pointer showing an embodiment of the present invention.

2A and 2B are explanatory diagrams showing reflection of light in the pointer of the present invention, FIG. 2A is an explanatory diagram showing reflection of the pointer at a cross section of X, and FIG. FIG. 7 is an explanatory diagram showing reflection on the Y cross section of FIG.

FIG. 3 is a sectional view showing a main part of a conventional self-luminous pointer illuminating device.

FIG. 4 is a side view of a conventional pointer.

FIG. 5 is a perspective view of a conventional pointer having a constant flat surface as a reflecting surface.

6A and 6B are explanatory diagrams showing reflection of light in the conventional pointer, FIG. 6A is an explanatory diagram showing reflection of the pointer at a cross section of X, and FIG. It is explanatory drawing which shows the reflection in the cross section of FIG.

FIG. 7 is a perspective view of a conventional pointer having a curved reflecting surface.

8A and 8B are explanatory diagrams showing how light is condensed in the conventional pointer, FIG. 8A is an explanatory diagram showing how light is condensed in the X cross section of the pointer, and FIG. It is explanatory drawing which shows the condensing in the Y cross section.

[Explanation of symbols]

6 guidelines 6a Reflective surface 6b Pointer shaft 6c Pointer section 7 Hot stamp layer or printed surface X Near the top of the reflecting surface Near the bottom of the Y reflection surface

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Claims (2)

(57) [Claims] 1. A pointer having a curved reflecting surface, wherein: (a) the pointer is introduced from the light source through the lower surface of the pointer shaft portion,
The reflected light reflected by the surface of the projection is placed on the bottom of the pointer.
Directly press the hot stamp surface or print surface directly.
Angle on the reflecting surface according to the shape of the stamp surface or printing surface
Paste, the (b) said reflecting surface, in the upper vicinity, so as to collect light in the distance, and a small curved surface of curvature, in that near the lower portion, as for focusing nearby, and a large curved surface of curvature, and ,
A guideline characterized by continuously changing from a curved surface with a small curvature to a curved surface with a large curvature from the upper portion to the lower portion. 2. The pointer according to claim 1, wherein the angle of the reflecting surface is set so that the light uniformly strikes the lower surface of the pointer.