JPS5918420A - Display device - Google Patents

Abstract

PURPOSE:To make the configuration of the entire pointer clear, by arranging a plate member with a window, which is provided at the upper part of a light guiding member, and a light guiding member of the pointer, whose rotary center is made to agree with the center of the plate member, on the upper part of the window. CONSTITUTION:A rotary shaft 7 is inserted in a through hole 9 of a light guiding member 5. A plate member 12 is rotatably attached to the rotary shaft 7. A window 13 is formed in the plate 12. A pointer 3 is made to agree with the rotary center of the plate member and attached on the member 12. A light introducing part 3c is provided on the pointer 3 at the upper part of the window 13. The upper part of the part 3c is coated by a cap 10. The size of the member 12 is determined so that the member 12 is approximately coupled with a light introducing window 11 at the upper surface of the member 5. The lower side of the member 12 other than the window 13 is convered so that it cannot be seen. In this constitution, light to the hole 9 from the outer surface of the member 5 is inputted to the introducing part 3c through a reflecting surface 8 of the hole 9 and the window 13 and goes to the upper part of the pointer 3 through a reflecting surface 3a and the like. Therefore, the part from the rotary center of the pointer 3 to the tip can be lighted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light-emitting type display device, and particularly to a light-emitting type display device in which the center of rotation of a pointer can be clearly identified.

Various instruments 2, including meters attached to the instrument panel 1 of a vehicle as shown in FIG. 1, have pointers 3 molded from synthetic resin such as acrylic.
A light-emitting type display device 4 is often used that displays the pointer floating above the gauge 2 by guiding light from a light source toward the pointer. An example of this is shown in Figure 2. This is done by opening a through hole 9 at a predetermined position in a plate made of a light-transmitting resin material, fixing it to a nine light guide member 5 and a rotating shaft 7, and inserting the rotating shaft 7 into the through hole 9 to attach it. Guideline 3 and
The cap 10 covers the center of rotation of the pointer 3 from above. The through hole 9 of the light guide member 5 is opened so as to gradually expand from the upper surface side to the lower surface side, and a reflective surface 8 is formed around the through hole 9. Further, a light shielding film 6 is attached to the upper surface of the light guide member 5 except for the area facing the reflective surface 8, and a light extraction window 11 facing the reflective surface 8 is attached.
is formed. The rear end surface of the pointer 3 has a slightly forward-inclined structure and is subjected to light reflection treatment to form a reflective surface 3a, while the lower surface of the pointer 3 also serves as a reflective surface 3b. Therefore, the light T from the light source that has passed through the light guide member 5 is reflected by the reflective surface 8, enters the pointer 3 through the light extraction window 9, and is first reflected by the reflective surface 3a toward the tip of the pointer 3. Then, it is further reflected on the reflective surface 3b and exits onto the pointer 3. Note that there is a cap 1 at the center of rotation of the pointer 3.
Since the part 0 is covered, no light leaks from this part to the outside, and the light guide member 5 and the through hole 9 formed therein are not visible from the outside.

However, such a conventional light-emitting type display device 4 has a structure in which a cap 10 is placed over the central portion of the pointer 3 in order to prevent light from leaking from the light introducing portion at the center of rotation. As a result, the center of rotation of the pointer 3 did not shine, and only the tip side appeared to be raised, and the pointer 3 appeared short, or the center appeared to be cut off. there were.

The present invention has been made in view of these conventional problems, and its purpose is to illuminate the pointer from its center of rotation to its tip, making the shape of the pointer clear over its entire length, and displaying it in the instrument. It is an object of the present invention to solve the above-mentioned problems of the prior art by providing a display device in which the content and the movement of the pointer can be clearly identified by the viewer.

The gist of the present invention is that the light introduction part of the pointer and the light reflecting surface within the pointer are arranged behind the rotation center,
In order to introduce light into the light introduction section, a plate member is formed with a window for light introduction in order to reliably guide the light to the light introduction section while blocking light leakage to other parts. is disposed below the pointer so that it can move coaxially with the pointer, and the window of this plate member is aligned with the light introduction portion of the pointer. For this reason, the pointer blocks the light emitted from the light extraction window formed on the top surface of the light guide member at the lower part of the pointer, and reflects the light taken in from the light introduction part inside the pointer, thereby controlling the center of rotation of the pointer. Light can be emitted over almost the entire length, including the upper part.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 3 and FIG. 8g4 are diagrams showing an embodiment of the present invention. The light-emitting type display device according to this embodiment has a light guide member 5 having a through hole 9 with a reflective surface 8, a rotary shaft 7, and a rotatable member that is attached by inserting the rotary shaft 7 into the through hole 9. It consists of a plate member 12 and a pointer 3 attached to the upper surface of the plate member 12 by adhesive or other method. A window 13 is formed in the part of the plate member 12 corresponding to the rear of the rotation center of the pointer 3, and a light introduction part 3C is provided in the pointer 3 in the upper part of this window 13, while a light introduction part 3C is provided in the upper part of the window 13. is Φ guy 1
0 is covered. The plate member 12 is made of a non-light-transmitting disk having dimensions that approximately fit into the light extraction window 11 formed on the upper surface of the light guide member 5.
The lower part of 2 is marked with an eye. The window 13 and the light introduction part 3C of the pointer 3 are aligned in the vertical direction so as to almost match each other 9, and while ensuring that the light from the light guide member 5 is taken into the pointer 3, this part It is hidden by a cap 10.

With this configuration, the lower part of the pointer 3, that is, the light guide member 5, the rotation axis T1, and the light extraction window 11, are covered with the membrane 6, the plate member 12, or the cap 10, and the internal structure of the display device 4 is is blindfolded. On the other hand, the light T traveling toward the through hole 9 from the outer circumference of the light guiding member 5 is reflected by the reflecting surface 8 and passes through the window 13 to the light introducing portion 3 of the pointer 3.
enter into C. The light is first reflected at a predetermined angle by the reflective surface 3a, and then reflected by the reflective surface provided on the lower surface of the pointer 3 and exits above the pointer 3.

For this reason, the pointer 3 can shine over a long range, including the center of rotation, from the boundary with the cap 10 to the tip, and the pointer 3 can be easily seen by the viewer. You can accurately recognize the direction in which you are pointing.

As explained above, according to the present invention, the plate member is arranged below the pointer for rotation purposes, while the light introduction part and reflective surface of the pointer are offset backward from the center of rotation, and the plate member is The structure allows light to be introduced to the area behind the center of rotation of the pointer through the opened window, allowing the pointer to emit light uniformly over a long range from the center of rotation to the tip. For this reason, the unnatural appearance of only the tip of the pointer appearing to be raised or the center being cut off, as in the past, is eliminated, and the movement of the pointer is also clear.
Various effects can be obtained, such as making it easier to read the scale.

[Brief explanation of drawings]

Fig. 1 is a front view showing an instrument panel portion of a vehicle equipped with a display device to which the present invention is applied, Fig. 2 is a sectional view showing a conventional example of the display device, and Fig. 3 is an embodiment of the present invention. A sectional view of the display device according to the example, and FIG. 4 is a plan view of the above embodiment. 1... Instrument panel 3... Pointers 3a, 3b... Reflective surface 3C
...Light introducing part 4...Display device 5...Light guiding part 6...Membrane 8...Reflecting surface 10...Cap 11...
・Window 12...Plate member 13...Window Patent Applicant: Nissan Motor Co., Ltd. Representative Patent Attorney Kaoru Dobashi

Claims (1)

[Claims] A light guiding member having a light reflecting surface and a window for taking out the reflected light, a plate member having a window for taking in light and rotatably disposed above the light guiding member, and a light introducing part behind the rotation center. The pointer has a light reflecting surface and is attached with its rotation center aligned with the rotation center of the plate member, and the light introduction part of the pointer is positioned above the window of the plate member, and the pointer is installed. A display device characterized by: