JPH0628639U - Transmitted illumination meter - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the size of the entire meter without causing the light shielding part to be thermally deformed or deteriorated by the light source. A display window 4 is bored in a dial plate 2 having a light-shielding property, and a transparent pointer 10 is rotatably arranged in the central portion on the front surface side. An odometer 6 or a trip meter 7 and a light guide plate 11 are arranged on the rear surface of the dial 2 so as to face the display window 4. The light source 12 is attached to the attachment portion 13 a of the case 13 near the end surface of the light guide portion 11 a of the light guide plate 11. The light 1 emitted from the light source 12 is introduced into the light guide portion 11 and is introduced into the pointer 10 from the light incident surface 10a to illuminate the pointer 10. A light blocking portion 11 b that blocks the light L emitted from the light source 12 to the display window 4 is integrally projected on the light guide plate 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transillumination meter suitable for an analog meter mounted on a vehicle, such as a vehicle speedometer.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as shown in FIG. 2 and FIG. That is, FIG. 2 is a front view of the speedometer, and FIG. 3 is a side view of the speedometer. In these figures, reference numeral 2 is a dial plate having a light-shielding property as a whole, and the peripheral edge is A light-transmitting display unit 3 including a scale line 3a for displaying speed and characters 3b is provided, and a pair of rectangular display windows 4 and 5 are formed in the central portion.

An odometer 6 and a trip meter 7, which are mechanical integrators configured to display a mileage constituted by a plurality of digit wheels, are provided on the back surface of the dial 2 so as to face the display windows 4 and 5. Has been done. Reference numeral 10 is a light-transmitting pointer which is rotatably supported at the center of the front side of the dial 2 and is rotatably supported to change the rotation angle according to the speed. The surface 10a is formed.

A light guide plate 11 having a light-transmitting property that guides light to the pointer 10 and the display unit 3 is provided over substantially the entire back surface of the dial plate 2. One end edge 11a of the light guide plate 11 is inclined downward to form a light guide section. The light source 12 mounted on the mounting portion 13a of the case 13 is disposed near the end surface of the light guide portion 11a. The odometer 6 and the trip meter 7 described above are fixed to the case 13 via the bracket 14.

The case 13 is provided with a light shielding portion 13b located between the light source 12 and the display windows 4 and 5. In such a configuration, the light 1 introduced from the light source 12 to the light guide portion 11a of the light guide plate 11 is guided to the central portion of the dial inside the light guide plate 11 and is guided from the light incident surface 10a to the pointer 10. And illuminates the pointer 10.

On the other hand, the light L emitted from the light source 12 in the directions of the display windows 4 and 5 is reflected by the light shielding portion 13b and does not reach the display windows 4 and 5. Direct light is prevented, and light does not leak from the display windows 4 and 5. Therefore, the dial 2 is illuminated only on the portions of the display portion 3 and the pointer 10 that need to be illuminated, and is not illuminated on the other portions, so that the design value of the illumination is improved.

[0007]

[Problems to be solved by the device]

 In the above-mentioned conventional transillumination meter, since the case 13 is provided with the light shielding portion 13b for preventing direct light to the display windows 4 and 5, the light shielding portion 13b is used as the light source 12 due to the structure. Since they have to be provided at positions close to each other, there is a problem that they are likely to receive heat from the light source 12 and cause thermal deformation or thermal deterioration due to high temperature. Further, if the light source 12 is separated from the light shielding portion 13b in order to prevent this, there is also a problem that the entire meter becomes large.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent the light-shielding portion from being thermally deformed or deteriorated by the light source. , To provide a miniaturized transmitted illumination meter.

[0009]

[Means for Solving the Problems]

 In order to achieve this object, in the transillumination meter according to the present invention, a display window is provided in a light-shielding dial, and a transparent pointer is provided on the front side of the dial. Also, on the back side of the dial, a totalizer facing the display window and a light guide plate for guiding light to the hands are respectively arranged, and an end face of the light guide plate is provided with a light source. The light-shielding part is provided between the light guide plate.

[0010]

[Action]

 According to the present invention, the light-shielding portion is provided at the central portion side of the light guide plate arranged on the back surface side of the dial.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a transillumination meter according to the present invention. In the figure, the same components as those of the conventional technique are designated by the same reference numerals, and detailed description thereof will be omitted.

The feature of the present invention resides in that the light guide plate 11 is provided with a light shielding portion 11b arranged between the light source 12 and the display windows 4 and 5. That is, when viewed from the side, a light-shielding portion 11b is integrally formed so as to project downward from a substantially central portion between the tip of the light-guide portion 11a and the central portion of the light-guide plate 11, and the light-shielding portion 11b allows the light source 12 to display windows 4, 5 The light L radiated to the display windows 4 and 5 is totally reflected so that the light L 1 is not radiated to the display windows 4 and 5.

The light-shielding surface 11c of the light-shielding portion 11b that is irradiated with the light L is satinized, and the light L from the light source 12 is diffusely reflected by the light-shielding surface 11c and the light-shielding effect of the light-shielding portion 11b is obtained. The fruit is raised.

As described above, by providing the light-shielding portion 11b on the light guide plate 11 provided on the back surface of the dial plate 2, the central portion of the dial plate 2 is closer to the center side than the case where the light-shielding portion 11b is provided in the conventional case. It is possible to dispose the light-shielding portion 11b away from the light source 12, so that the influence of heat from the light source 12 can be reduced, and deformation and deterioration due to heat can be prevented.

Further, since the light shielding portion 11b can be arranged apart from the light source 12, the position of the light source 12 is accordingly increased as much as possible so that the light shielding portion 11b is not affected by heat. It can be arranged on the center side of the second unit, which makes it possible to reduce the size of the entire meter.

[0016]

[Effect of device]

 As described above, according to the present invention, a display window is formed in a dial plate having a light shielding property, an odometer is arranged on the back side of the dial so as to face the display window, and the front side of the dial is provided. Is a light-transmitting pointer, and a light guide plate that guides light to the pointer is provided on the back side of the dial, and a light source is provided at the end surface of the light guide plate. Since the light-shielding part placed between the light-guide plates is provided, it is possible to arrange the light-shielding part on the center side of the dial, and the light-shielding part can be arranged separately from the light source. The influence of the heat can be reduced, and deformation and deterioration due to heat can be prevented.

Further, since the light-shielding portion can be arranged apart from the light source, the light-source position is also arranged as close to the center of the dial plate as possible so that the light-shielding portion is not affected by heat. It is possible to reduce the size of the entire meter.

[Brief description of drawings]

FIG. 1 is a side view of a transillumination meter according to the present invention.

FIG. 2 is a front view of a conventional transillumination meter.

FIG. 3 is a side view of a conventional transillumination meter.

[Explanation of symbols]

 2 dial 3 display 4 display window 5 display 6 odometer 7 trip meter 10 pointer 11 light guide plate 11b light shield 12 light source

Claims (1)

[Scope of utility model registration request] 1. A light-shielding dial having a display window formed therein, a light-transmitting pointer disposed on the front side of the dial, and a back surface of the dial facing the display window. Side of the dial, a light guide plate for guiding light to the pointer, and a light source arranged on the end face of the light guide plate. A transillumination type meter characterized in that a light-shielding portion disposed between the light-guiding plate and the light-guiding plate is provided.