JP2002002329A - Indicating instrument apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indicating instrument apparatus having a pointer which is luminous at high brightness. SOLUTION: The indicating instrument apparatus has an emissive display element 12, the pointer 20 disposed in front of the display element 12, and a pointer drive means for rotating the pointer 20. The element 12 has first light emitting parts 13 serving as index parts indicated by an indicating part 21, and second light emitting parts 14 emitting light for making the indicating part 21 luminous.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indicating instrument device, and more particularly to an indicating instrument device having a light emitting type pointer.

[0002]

2. Description of the Related Art Conventionally, there is an indicating instrument device as shown in FIG. Such an indicating instrument device rotates an indicator 2 according to a physical quantity (for example, the speed of a vehicle) by an indicator driving means 1 such as a cross-coil type movement, and an indicator 3 of the indicator 2.
The physical quantity is displayed by indicating the scale (index portion) of the dial 4 with. A light guide member 5 made of a translucent resin such as acrylic is provided on the rear side of the dial 4, and the indicating instrument device guides the light of a light source 6 such as a bulb to the pointer 2 with the light guide member 5. Thus, a pointer illumination structure for illuminating the indicator 3 is provided. The light emitted from the light source 6 enters from the light receiving surface 7 of the light guide member 5, is reflected by the reflecting surfaces 8 and 9, enters from the light receiving surface 10 of the pointer 2, and is reflected by the reflecting surface 10 to the indicator 3. .

[0003]

However, the pointer illumination structure as described above has a problem that the brightness of the indicator 3 is low. In other words, it is ideal if all the light entering from the light receiving surface 7 of the light guide member 5 is reflected by the reflection surface 8 in a direction parallel to the dial 4, but a part of the light is Would pass outside. Similarly, on the reflection surface 9 of the light guide member 5, part of the light passes without being reflected by the reflection surface 10 of the pointer 2. Therefore, only a part of the light emitted from the light source 6 can reach the pointer 2 and the indicator 3
Brightness becomes low.

[0004] In order to solve this problem, there has been proposed a light emitting type pointer in which a light emitting diode is incorporated in the pointer 2 and light is emitted from the light emitting diode to the indicator 3 (for example, see Japanese Patent Application Laid-Open No. 8-128868). ). However, guideline 2
Incorporating a light-emitting diode into the device has another problem that the wiring structure for supplying current to the light-emitting diode becomes complicated. The present invention has been made in view of the above problems, and has as its object to provide an indicating instrument device in which a wiring structure is not likely to be complicated and a pointer shines with high luminance.

[0005]

In order to solve the above-mentioned problems, the present invention provides a light-emitting display element 12 and a pointer 20 having an indicator 21 and disposed in front of the light-emitting display element 12.
And a pointer driving means 25 for rotating the pointer 20.
Is a first light emitting unit 13 instructed by the instruction unit 21,
The second light emitting unit 14 that emits light that shines the pointer 20
And

Further, according to the present invention, the pointer 20 has a light receiving surface 23 provided at a position facing the second light emitting portion 14.
And a reflecting surface 24 for reflecting the light entering from the light receiving surface 23 to the indicating section 21.

Further, in the present invention, the light receiving surface 23 is a curved surface for collecting the light emitted by the second light emitting portion 14 on the reflecting surface 24.

Further, the present invention relates to the light emitting display element 12 described above.
Has a third light-emitting unit 15 for displaying numbers by light-emitting segments arranged in a Japanese character shape.

Further, the present invention is provided with a return member 28 having an opening 29 for making the first light emitting portion 13 visible and a concealing portion 30 for concealing the second light emitting portion 14.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The indicating instrument device has a self-luminous display element 12, a pointer 20 disposed in front of the self-luminous display element 12, and a pointer driving means 25 for rotating the pointer 20. . The self-luminous display element 12 includes a first light emitting unit 13 that is an index unit instructed by the instruction unit 21, a second light emitting unit 14 that emits light that makes the instruction unit 21 shine, and is arranged in a Japanese character shape. And a third light emitting unit 15 for displaying a number by a plurality of light emitting segments. The light emitted from the second light emitting unit 14 enters through the light receiving surface 23 of the pointer 21 and is reflected by the reflecting surface 24 to the pointing unit 21.

In the indicating instrument device, the pointer 20 is rotated by the pointer driving means 25 in accordance with a first physical quantity (for example, vehicle speed), and the indicating section 21 of the pointer 20 controls the first light emitting section 13 (index section). By instructing, the first physical quantity is displayed. In addition, the indicating instrument device turns on / off the third light emitting units 15 according to the second physical quantity (for example, the engine speed).
By turning off, the second physical quantity is displayed by a number.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a vehicle indicating instrument device will be described below with reference to the accompanying drawings. In addition,
FIG. 2 is a cross-sectional view of a portion indicated by reference numeral AA in FIG. 1, but the hand 20 is illustrated at a position turned upward in the drawing to facilitate understanding.

Reference numeral 12 denotes a fluorescent display tube (light-emitting display element). The fluorescent display tube 12 has a first light-emitting segment 13.
(A first light emitting portion), a second light emitting segment 14 (a second light emitting portion), and a third light emitting segment 15 (a third light emitting portion). The first light-emitting segment 13 is an index portion indicated by a pointer described later, and is arranged in an arc shape. The second light-emitting segment 14 has a square shape and emits light that makes a pointer indicating portion described later shine. The second light emitting segment 14 is disposed at the center of the arc of the first light emitting segment 13.

The third light-emitting segments 15 are arranged in the shape of a Japanese character, and the speed of the vehicle is indicated by a numeral by turning each light-emitting segment 15 on and off. Also,
The fluorescent display tube 12 has a light emitting segment 16 provided with numbers “0” to “7” provided near the first light emitting segment 13 and a speed provided near the third light emitting segment 15. It has a light emitting segment 17 composed of units.

Reference numeral 18 denotes a circuit board. The circuit board 18 is provided on the rear side of the fluorescent display tube 12 and has lead pins 19 of the fluorescent display tube 12 connected thereto. Reference numeral 20 denotes a pointer, which is disposed on the front side of the fluorescent display tube 12. The pointer 20 has an indicating portion 21 for indicating an index portion composed of the first light-emitting segment 13 and a boss portion 22 that is press-fitted into a rotating shaft described later. The light emitted by the second light emitting segment 14 enters through the light receiving surface 23 of the pointer 20 and is reflected by the reflecting surface 24 to the pointing unit 21. The light receiving surface 23 is provided at a position facing the second light emitting segment 14,
The curved surface protrudes toward the second light emitting segment 14.

Reference numeral 25 denotes a stepping motor (a pointer driving means).
Has a rotating shaft 26 into which the boss portion 22 is press-fitted. 2
Reference numeral 7 denotes a circuit board, to which a stepping motor 23 is connected. 28 is a look back member,
The return member 28 is disposed in front of the stepping motor 25 and the circuit board 27. An opening 29 is formed in the facing member 28, and the opening 29 has such a size that the first light emitting segment 13, the third light emitting segment 15, and the light emitting segments 16 and 17 can be visually recognized. The facing member 28 has a concealing portion 30, and the concealing portion 30 conceals the second light emitting portion 14, the stepping motor 25, and the circuit board 27 so as not to be seen.

Next, a microcomputer 30 for controlling the stepping motor 25 and the fluorescent display tube 12 will be described with reference to the block diagram shown in FIG. The microcomputer 30 is a CPU
31, a RAM 32 and a ROM 33.
The microcomputer 30 receives the speed data from the speed sensor 34 and drives the stepping motor 25 via the drive circuit 35. Further, the microcomputer 30 receives rotation speed data from the rotation speed sensor 36, turns on / off the third light emitting segments 15 of the fluorescent display tube 12 via the drive circuit 37, and displays the rotation speed of the engine. . The first light-emitting segment 13, the second light-emitting segment 14, and the light-emitting segments 16, 17 are always lit.

According to this embodiment, since the second light emitting segment 14 of the fluorescent display tube 12 can directly irradiate the light receiving surface 23 of the pointer 20 with light, the brightness of the indicator 21 is increased. be able to. In addition, since the fluorescent display tube 12 is a display element that displays the index portion (the first light-emitting segment 13) and a number (the third light-emitting segment), and is also a lighting element that has the second light-emitting segment 14,
A light source for illuminating the pointer 20 is unnecessary, the number of parts is small, and assembly is easy.

The light receiving surface 23 of the pointer 20 may be a flat surface. However, as in this embodiment, the light irradiated by the light emitting segment 14 is formed as a curved surface such as a convex lens.
, The luminance of the instruction unit 21 can be further increased. Further, the light emitting display element of the present embodiment is the fluorescent display tube 12, but may be, for example, an electroluminescent display element (EL display element). Further, the second light-emitting segment 14 is square, but may be circular, for example.

[0020]

According to the present invention, there is provided an indicating instrument having a light-emitting display element, a pointer having a pointing portion, disposed in front of the light-emitting display element, and pointer driving means for rotating the pointer. The device, wherein the light-emitting display element has a first light-emitting unit instructed by the instruction unit, and a second light-emitting unit that emits light that shines the hands, Since the surface can directly receive the light emitted by the second light-emitting segment, the brightness of the indicator can be increased.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing the embodiment.

FIG. 3 is a front view of the fluorescent display tube showing the embodiment.

FIG. 4 is a block diagram showing the embodiment.

FIG. 5 is a sectional view showing a conventional example.

[Explanation of symbols]

 12 fluorescent display tube (light emitting display element) 13 first light emitting segment (first light emitting unit) 14 second light emitting segment (second light emitting unit) 15 third light emitting segment (third light emitting unit) 20 Pointer 21 Pointer 23 Light receiving surface 24 Reflecting surface 25 Stepping motor (pointer driving means) 28 Look back member 29 Opening 30 Concealer

Continued on the front page (72) Inventor Akira Suzuki 1-1190 Fujibashi, Nagaoka-shi, Niigata F-term in R & D Center Japan Precision Equipment Co., Ltd. 3D044 BA03 BA22 BA27 BB01 BD02

Claims (5)

[Claims] 1. An indicating instrument device comprising: a luminescent display element; a pointer having a pointing portion, disposed in front of the luminescent display element; and pointer driving means for rotating the pointer. An indicator device comprising: a light-emitting display element having a first light-emitting unit instructed by the indicator and a second light-emitting unit that emits light that shines the pointer. 2. The indicating instrument device according to claim 1, wherein the pointer has a light receiving surface provided at a position facing the second light emitting unit, and a light incident from the light receiving surface is transmitted to the indicating unit. An indicating instrument device, comprising: a reflecting surface for reflecting light. 3. The indicating instrument device according to claim 2, wherein the light receiving surface is a curved surface that collects light emitted by the second light emitting unit on the reflecting surface. 4. The indicating instrument device according to claim 1, wherein the light-emitting display element displays a number by a light-emitting segment arranged in a Japanese character shape. An indicating instrument device comprising: 5. The indicating instrument device according to claim 1, further comprising an opening that allows the first light emitting unit to be visually recognized and a concealing unit that hides the second light emitting unit. An indicating instrument device comprising a member.