JP4873286B2 - Indicating instrument - Google Patents

Description

  The present invention relates to an indicating instrument mounted on a vehicle or the like, and more particularly to an indicating instrument that indicates vehicle information such as the speed of a vehicle and the number of revolutions of an engine, by indicating that a pointer moves to an indicator provided on a dial. Is.

The indicator instrument disclosed in Patent Document 1 includes a pointer made of a light guide member, a light source provided at the lower center of the rotation of the pointer, a pointer cap that covers the entire pointer, and a display of the pointer cap along the longitudinal direction of the pointer. A pointer is provided which includes a slit provided on the surface side and a hole provided at the tip of the pointer cap, and has a structure for emitting light received at the center of rotation outward from the slit and the hole. Such a pointer secures the amount of light emitted from the tip of the pointer by suppressing light leakage by a pointer cap provided so as to cover the entire pointer. Further, by providing a light-transmitting colored film at the tip of the pointer, light of a color different from that of the light source can be emitted from the tip of the pointer.
JP 2000-329590 A

In addition, the indicator disclosed in Patent Document 2 includes a pointer having a blue light emitting LED (light emitting diode) and a phosphor that is made of a light guide member and is excited by blue light on the non-display surface side (dial plate side). And a structure for emitting the pointer in white. The indicator instrument configured as described above can emit the pointer in a color different from the emission color of the light source, and can also emit the pointer in white without using an expensive white LED, thereby reducing the cost. can do.
JP 2001-201372 A

  However, in the configuration disclosed in Patent Document 1, a common light source is used to emit light from the entire pointer and emit light from the tip of the pointer, and the emission color of the entire pointer differs from the emission color of the emitted light from the tip. In the case where the configuration disclosed in Patent Document 2 in which the color of light incident from the light source is converted on the non-observer side of the pointer is applied, the color is converted and reflected on the non-observer side of the pointer in the light guide portion of the pointer. Since the white light traveling to the display surface side and the blue light emitted from the tip with the light emission color of the light source will be mixed, the light emission color of the pointer will be mixed with white and blue, and it will be unclear, There was a problem that it did not look good.

  In addition, a common light source is used to emit light from the observer side of the pointer, and light is emitted outward (dial plate, etc.) from the non-observer side of the pointer to create a design with a sense of depth and three-dimensionality. In order to obtain an excellent indicating instrument, in the configurations disclosed in Patent Document 1 and Patent Document 2, the pointer may irradiate light having a color different from that of the observer side from a region other than the observer side. There was a problem that I could not.

  The present invention has been made in view of this point, and uses a common light source to emit light on the observer side of the pointer and emit light of a color different from that on the observer side from an area excluding the observer side of the pointer. An object of the present invention is to provide an indicating instrument that emits light with a clear color and improves its appearance in an indicating instrument configured to emit light.

In order to solve the above-described problems, the present invention includes a light source and a pointer that includes a light guide member and includes a first light-emitting portion and a second light-emitting portion, and the first light-emitting portion includes the pointer. A color conversion layer that is provided on the viewer side and emits light emitted from the light source in a different emission color, and a color generation layer provided on the viewer side of the color conversion layer, and the second The light emitting unit is provided on the dial side of the pointer and emits light having a light emission color different from the light emission color of the first light emission unit.

  According to a second aspect of the present invention, the light source emits light in the same emission color as the light emitted from the second light emitting unit.

  In the present invention, by providing a color conversion layer on the observer side of the pointer, a common light source is used to emit light on the observer side of the pointer, and is different from the observer side from a portion excluding the observer side of the pointer. Even an indicating instrument configured to emit color light can make the emission color of the entire pointer clear and improve the appearance.

  Embodiments of an indicating instrument to which the present invention is applied will be described below with reference to the accompanying drawings.

  1 to 2 show a first embodiment of the present invention. FIG. 1 is a front view of an indicating instrument, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  As shown in FIGS. 1 and 2, the indicating instrument 1 according to the present embodiment includes a light source 2, a pointer 3, a dial 4, and a turning member 5 in a case 6. The speed of the vehicle is shown using an analog display by contrast reading with the plate 4.

  The light source 2 is a top view type light emitting diode mounted on a circuit board 7 described in detail later, and emits blue light to illuminate the pointer 3.

  The pointer 3 is made of a light-transmitting material such as acrylic or polycarbonate, and is provided on a drive shaft 9 extending from the center of a drive source 8 provided on the back surface of the circuit board 7 which will be described in detail later. Rotate with it. The pointer 3 includes a rotation center portion 10 into which the drive shaft 9 is inserted and receives light from the light source 2, and a pointer portion 11 that extends from the rotation center portion 10 toward the index portion 20 and exposes the translucent material. Prepare. The rotation center portion 10 includes a reflection surface 12 that reflects received light to the pointer portion 11 and is covered with a light-shielding pointer cap 13.

  The pointer unit 11 includes a first light emitting unit 14 on the observer side, and a second light emitting unit 15 on the tip thereof.

  The first light emitting unit 14 includes a color conversion layer 16 and a color developing layer 17 made of a phosphor excited by blue LED light.

  The color conversion layer 16 is a resin sheet containing a YAG (Yttrium / Aluminum / Garnet) phosphor and is affixed to the pointer portion 11. The YAG-based phosphor converts a part of the wavelength component of the blue LED into long-wavelength light, thereby producing a white emission color by mixing the original blue component and long-wavelength component. The light L1 that emits light in blue (first color tone) travels through the pointer portion 11 and passes through the color conversion layer 16, and then becomes white (second color tone) light L2.

  The color conversion layer 16 may be formed by mixing a YAG-based phosphor into a translucent resin constituting the pointer portion 11 observer side, and is provided by printing or painting. Also good.

  The color developing layer 17 is a transparent white print layer provided on the color conversion layer 16 and provided by a hot stamp or the like on the front side of the pointer 3 (pointer portion 11). When the pointer 3 is displayed by reflection by outside light without using a backlight such as daytime, the pointer 3 is visually recognized in white by the color developing layer 17.

  The second light emitting unit 15 is provided at the tip of the pointer 3 (pointer unit 11), and emits light L3 received from the light source 2 and emitted in blue (first color tone) outward. When the pointer 3 does not emit light from the tip, in order to prevent light leakage from the tip, the pointer 3 is set to a tapered shape as it goes outward. In this embodiment, the tip 3 The cross section is set larger than the cross section of the tip of the pointer 3 when light is not emitted from the tip, and the light quantity of the emitted light L3 from the tip is ensured. The light L3 emitted from the second light emitting unit 15 and emitting blue light is provided along the indicator unit 20 described in detail later, and the reflecting unit 18 facing the second light emitting unit 15 on the outer periphery of the rotation region of the pointer 3. Reflected by.

  Of the light L1 having the blue color (first color tone) received from the light source 2 by the pointer structure as described above, the light traveling to the viewer side passes through the color conversion layer 16 and emits white light (second color tone). The transmitted light L2 of the first light emitting section 14 is emitted, and the light traveling toward the tip of the pointer 3 is maintained in the blue (first color tone) emission color of the light source 2 from the second light emitting section 15. It becomes the emitted light L3. In the present invention, since the color conversion layer 16 is provided on the observer side of the pointer 3, the mixed color does not occur in the pointer portion 11, and the clear white color (second color tone) of the light L2 transmitted through the color conversion layer 16 is obtained. ), The user can visually recognize the first light emitting unit 14 and improve the appearance of the indicating instrument 1.

  The drive source 8 includes a stepping motor, a cross coil, and the like, and is provided on the back surface of the circuit board 7 described in detail later. The drive source 8 has a drive shaft 9 that extends from the drive source 8 through the circuit board 7 and extends in the direction of the dial 4, and a rotation center portion 10 of the pointer 3 is fixed to the tip of the drive shaft 9.

  The dial plate 4 includes a background portion 19 in which a metallic light-shielding ink is applied to a translucent member made of a synthetic resin or the like, and an indicator portion 20 formed of a white transmissive ink. The pointer 3 rotates on the observer side.

  The indicator unit 20 is composed of a number 21 from 0 to 160 that serves as an index indicating the speed of the vehicle, and a scale 22 corresponding to the number.

  The facing member 5 is made of black synthetic resin or the like, and has an opening 23 facing the dial 4 at the center. The turn-back member 5 is provided on the observer side of the dial 4 with a predetermined interval. The edge 5 hangs down from the dial 4 at the edge of the opening 23 and is inclined so that the cross section has a substantially mortar shape. A reflecting portion (reflecting member) 18 facing the second light emitting portion 15 (tip 3) is provided. The reflection portion 18 is provided with a reflection surface 24 made of a metal that reflects light on the surface thereof. The reflection part 18 reflects the light L3 emitted from the tip of the pointer 3 described later in detail in the display direction. The user causes the blue point light emitting unit 25 positioned in the pointing direction of the pointer 3 to draw an arc along with the rotation of the pointer 3 on the reflection portion 18 provided in an arc shape so as to surround the outer periphery of the rotation area of the pointer 3. Visually move to

  In the present embodiment, the reflecting member 18 is provided with the reflecting portion 18, but the reflecting portion 18 may be provided as a single arc on the outer periphery of the movement region of the pointer 3. The shape and members are arbitrary as long as the light L3 emitted from the tip with the movement is reflected so as to be visible to the user as the point light emitting unit 25.

  The circuit board 7 is a hard board made of glass epoxy resin or the like, a drive source 8 is mounted on the back surface, and a plurality of light sources 2 made of LEDs are mounted on the front surface.

  The case 6 is made of a synthetic resin and is made of a white material covering the back side of the circuit board 7 and a transparent material covering the front side of the observer side, and instructions from the pointer 3, dial 4, drive source 8, circuit board 7, etc. The main components of the meter 1 are accommodated.

  The indicator instrument 1 of the present embodiment having the above-described configuration uses the common light source 2 to cause the first light emitting unit 14 to emit light with a light emission color L2 different from that of the light source 2, and to emit light different from the pointer 3 as a whole. In the indicating instrument 1 configured to emit the color light L3 from the second light emitting portion (tip 3 tip), by providing the color conversion layer 16 on the observer side of the pointer 3, the emission color of the entire pointer 3 is made clear. It is possible to provide the indicating instrument 1 that can improve the appearance.

  Thus, the indicating instrument 1 of the present invention can make the emission color of the whole pointer 3 clear and improve the appearance.

  In the present invention, it is necessary to provide means for converting the light emission color of the light source 2 into a predetermined light emission color in the second light emission unit 15 by setting the light emission colors of the second light emission unit 15 and the light source 2 in the same manner. Absent.

  Further, according to the present invention, the reflected light (L3) emitted from the second light emitting unit 15 is reflected by the reflecting unit (reflecting member) 18 so that the user can instruct by the pointer 3 itself and the point light emitting unit 25 on the reflecting unit 18. Information can be read.

  Further, according to the present invention, the coloring layer 17 is provided on the viewer side of the color conversion layer 16, so that the pointer 3 can be seen from the coloring layer 17 when the pointer 3 is visually recognized by external light during the daytime when backlight illumination is not performed. Can be visually recognized.

  In the present embodiment, blue light-emitting LEDs are used as the light source 2, but the light source 2 and its emission color are arbitrary. You may make the luminescent color of the 2nd light emission part 15 differ from the luminescent color of the light source 2 using the color conversion layer 16 or a colored film.

  In the present embodiment, the second light emitting portion is provided at the tip of the pointer, but in the present invention, it may be provided on the non-observer side (the dial side and the side surface) of the pointer ( Second embodiment). In this case, the pointer irradiates light outward from a second light emitting portion provided on the non-observer side of the pointer, and illuminates a dial plate having a reflective function such as metallic. In the second embodiment, when a blue light source is used and the pointer emits white light at the first light emitting unit, the observer turns to float on a blue background (such as a dial). The moving white light emitting pointer is visually recognized.

  The second light emitting unit may be provided on both the pointer tip and the pointer non-observer side.

The front view of the indicating instrument 1 by 1st embodiment. AA sectional drawing of FIG.

DESCRIPTION OF SYMBOLS 1 Indicator 2 Light source 3 Pointer 14 1st light emission part 15 2nd light emission part
16 color conversion layer 18 reflective member (reflective part)
17 Coloring layer

Claims (2)

A light source;
A pointer made of a light guide member and having a first light emitting part and a second light emitting part;
With
The first light emitting unit is provided on the observer side of the pointer and changes the light incident from the light source into a different emission color and emits the color conversion layer and the color conversion layer provided on the observer side of the color conversion layer A layer, and
The indicator instrument, wherein the second light-emitting unit is provided on the dial side of the pointer and emits light of an emission color different from the emission color of the first light-emitting unit. The indicating instrument according to claim 1, wherein the light source emits light with the same emission color as the light emitted from the second light emitting unit.

Images