JP4508695B2 - Instrument display - Google Patents

Description

  The present invention relates to an instrument display device mounted on, for example, an automobile, and more particularly to an instrument display device whose merchantability is improved by devising how to display a design.

The thing of the following patent document 1 is known as an example of the instrument display apparatus which displays a predetermined instrument design on a transparent flat light guide. The instrument display device includes a pointer and a flat light guide disposed behind the pointer, and the flat light guide has a design portion such as a scale or a number as a target of the pointer. It is printed.
JP-A-8-189844 (FIG. 1)

  According to the instrument display device, by providing the design portion on the transparent flat light guide, it is possible to provide the observer with a visual expression that the design portion is floating. However, since the design portion is merely printed on the flat light guide, there is room for improvement in that the appearance is flat and the stereoscopic effect and the depth are poor.

  Therefore, the present invention has been made in view of this point, and its main purpose is to provide an instrument display device that can bring out a high-class feeling with a three-dimensional effect and can improve the merchantability. It is.

In order to achieve the above object, the present invention provides an instrument display device that displays a predetermined instrument design on a flat light guide, and a light guide member that surrounds a predetermined region of the instrument design on the front surface of the flat light guide. And providing a light-shielding layer on the side of the light- guiding member facing the flat light guide , providing a reflective layer on the light-shielding layer, and partially removing and printing the light-shielding layer and the reflective layer. A design portion that forms at least a part of the instrument design is provided.

Further, the present invention provides a light shielding portion on the outer periphery of the light guide member, and continuously forms a bottom surface of the light shielding portion and a bottom surface on the side of the light guide member facing the flat light guide without any steps, In addition, the light shielding layer and the reflection layer are provided on both bottom surfaces.

Moreover, the present invention is characterized in that a reflective layer is provided on a back surface of the flat light guide and corresponding to the light guide member.

  ADVANTAGE OF THE INVENTION According to this invention, the initial objective can be achieved, the high-class feeling with a three-dimensional effect can be brought out, and the instrument display apparatus which can improve merchantability can be provided.

  1 to 4 show an embodiment in which an instrument display device according to the present invention is applied to an instrument device for a vehicle. FIG. 1 is a front view of the instrument display device, and FIG. 2 is a line AA in FIG. 3 is a cross-sectional view of the light guide member, and FIG. 4 is a perspective view in which the light guide member is laminated on the flat light guide.

  The instrument display device 1 of the present embodiment constitutes an engine tachometer that represents the number of revolutions of an engine mounted on a vehicle, and as shown in FIG. The indicator part 3 and the second indicator part (design part) 4 and a display 5 are provided. Reference numeral 6 is a reversal for concealing a required portion, and includes a pointer-type instrument design composed of the pointer 2 and the first and second indicator portions 3 and 4, and an opening 6a for exposing the display 5. . In the present embodiment, only the engine tachometer is shown. However, in addition to the engine tachometer, a speedometer, a fuel meter, a water temperature meter, and a voltmeter may be incorporated to constitute a combination meter.

  The pointer 2 emits light by a pointer light source to be described later, and is rotated on the dial 3 by a pointer driving device to be described later.

  The first indicator portion 3 is composed of numerals arranged in an arc shape along the movement path of the pointer 2, and is formed on the back surface of the flat light guide 7 as a white print layer in the present embodiment, for example. (See FIG. 2).

  Similar to the first index unit 3, the second index unit 4 is composed of a scale arranged outside the first index unit 3 along the movement path of the pointer 2, and in this embodiment, shown in FIG. Thus, it is formed in the back surface of the light guide member 8 as a printing extraction part mentioned later.

  As illustrated in FIG. 2, a background plate 9 is disposed behind the flat light guide 7 so as to be separated from the flat light guide 7, and on the front surface of the background plate 9 (the surface facing the flat light guide 7). A background portion (not shown) serving as the background of the first indicator portion 3 is formed.

  As the background portion, for example, a gradation pattern in which the color density or the color itself changes in a specific direction can be applied, and any means such as printing, painting, transfer, and pasting can be selected as the forming means.

  The background plate 9, the flat light guide 7, and the light guide member 8 are coupled through a frame 10 located behind the background plate 9 and mounted on the circuit board 11.

  Reference numeral 12 denotes a light source that supplies light to the flat light guide 7. In this embodiment, a light emitting diode is employed, and is provided at a position that is separated in a direction perpendicular to the plate surface direction of the flat light guide 7. Yes. Reference numerals 13a and 13b denote holding members for fixing the background plate 9, and hold the inner side and the outer side of the background plate 9, respectively. Reference numeral 14 denotes a light guide that guides light from the light source 12 to the flat light guide 7, and is provided between the light source 12 and the flat light guide 7. A shielding member 15 is provided so that the light of the light source 13 is not directly visible to the driver, and is disposed on the front surface of the flat light guide 7 so as to be located around the center of rotation of the pointer 2.

  On the circuit board 12, a display 5 and a pointer driving device 16 that drives the pointer 2 by a pointer shaft 16a are attached. The display 5 includes a display element 17 made of, for example, a liquid crystal display element, a holder 18 that holds the display element 17, and a light source 19 made of, for example, a light emitting diode that illuminates the display element 17 from behind. Reference numeral 20 denotes a flexible wiring board for connecting the display element 17 and the circuit board 11. Reference numeral 21 denotes a frame that covers a portion other than the necessary portion of the display element 17. The display element 17 is exposed from the window 22 and is formed integrally with the holding members 13 a and 13 b described above. Reference numeral 23 denotes a light source made up of, for example, a light emitting diode that illuminates the pointer 2.

  As shown in FIG. 4, the flat light guide 7 is substantially disc-shaped or substantially fan-shaped, made of a synthetic resin that is substantially colorless and transparent, and has good translucency, and has a reflecting surface 7a on the pointer 2 side. ing. The reflecting surface 7a changes light coming from a direction perpendicular to the plate surface direction of the flat light guide 7 mainly in the plate surface direction. Further, on the back surface of the flat light guide 7, a first indicator portion 3 (shown in a simplified manner by a rectangular encircled dotted line in FIG. 4) is formed, and as shown in FIG. A first reflective layer 7b is formed in a portion corresponding to the optical member 8, and a second reflective layer 7c is formed in a portion corresponding to the shielding member 15 on the pointer 2 side, and the first and second reflective layers 7b, 7b, 7c is the same white print layer as the first indicator portion 3, and is formed in a single printing process. Reference numeral 7d denotes a through hole through which the pointer shaft 16a of the pointer driving device 16 passes.

  In the present embodiment, the light guide member 8 is composed of the pointer 2 and the first and second indicator portions 3 and 4. Of the instrument design that spreads based on the rotation center of the pointer 2, the pointer 2 and the first indicator It has a planar arc shape (ring shape) in plan view surrounding the predetermined region R including the portion 3, and is made of a synthetic resin that is substantially colorless and transparent and has good translucency, like the flat light guide 7. 1 and 2 are laminated in front of the flat light guide 7 and on the end side, and are assembled so that the front side is exposed from the opening 6a of the turn 6 as shown in FIGS.

  The cross-sectional shape of the light guide member 8 is as shown in detail in FIG. 3, and the thickness gradually decreases from the outside (the side far from the center of rotation of the pointer 2) to the inside (the side near the center of rotation of the pointer 2). It has a triangular section, and the bottom surface (the side facing the flat light guide 7) 8a is parallel to the flat light guide 7, and the side surface 8b is substantially vertical to the flat light guide 7. The front surface 8 c is inclined toward the center of rotation of the pointer 2.

  A light shielding layer 81 and a reflective layer 82 are formed on the bottom surface 8a by, for example, printing. In the present embodiment, the light shielding layer 81 is black that blocks light, and the reflective layer 82 is white that reflects light. The light shielding layer 81 and the reflective layer 82 are portions constituting the second indicator portion 4 that is a scale. The second indicator portion 4 having good translucency is formed by printing without printing. The light shielding layer 81 and the reflective layer 82 are also continuously formed on the bottom surface of a light shielding portion 83 described later.

  In addition, a light-shielding portion 83 having light-shielding properties is formed on the outer periphery (side surface 8b) of the light guide member 8 and around the entire periphery thereof. The light shielding portion 83 is made of, for example, a black synthetic resin (member), blocks or restricts transmission of external light or illumination light, and the inside is guided through the light guide member 8 when the light guide member 8 is viewed obliquely, for example. This prevents the light from being seen through and the internal illumination light from moving toward the viewer. In the case of the present embodiment, the light guide member 8 is integrally formed. That is, the light guide member 8 according to the present embodiment uses a synthetic resin (member) having a light shielding property after injection-molding a triangular section (light guide member body) using a transparent synthetic resin (member). The light-shielding part 83 is injection-molded, or each part is injection-molded in the reverse order to form an integral part. Note that the light-shielding portion 83 can be formed of a semi-transmissive member as long as light transmission can be blocked or restricted. Further, the bottom surface of the light shielding portion 83 is configured to be continuous with the bottom surface 8a of the triangular section in consideration of the deposition of the light shielding layer 81 and the reflective layer 82 without any step.

  The frame 10 is made of a white synthetic resin and includes a light shielding wall 10a so that light from the light source 12 and the light source 23 is not mixed. The light shielding wall 10a is substantially cylindrical.

  A plurality of the light sources 12 are provided along the light shielding wall 10 a, and the light guide 14 is provided along the light shielding wall 10 a corresponding to the light source 12.

  The shielding member 15 is made of a light-shielding synthetic resin, and a reflective surface 15a having a light reflecting color such as white is formed behind the shielding member 15 so as to favorably reflect light from the light source 12. The reflection portion 15 a reflects light transmitted from the light source 12 through the reflection surface 7 a of the flat light guide 7 and returns the light to the flat light guide 7 again.

  In the present embodiment configured as described above, when the light source 12 is turned on, the light emitted from the light source 12 passes through the light guide 14 and is reflected by the reflection surface 7 a of the flat light guide 7. At this time, the light leaked from the light guide 14 is reflected downward by the second reflective layer 7c, and is visually recognized as a background by the observer by indirectly illuminating the surface of the background plate 10. Further, the light passing through the flat light guide 7 illuminates the first indicator portion 3, and this illumination image is visually recognized by the observer and reflected by the first reflective layer 7 b toward the light guide member 8. Then, the second indicator portion 4 is transmitted and illuminated, and this transmitted illumination image is visually recognized by the observer through the light guide member 8. On the other hand, when the light source 12 is turned off, external light such as natural light or room light is incident on the background plate 10 and the first indicator portion 3 through the flat light guide 7, so that the background and the first indicator portion 3. Is visually recognized by the observer and enters the second indicator portion 8 through the light guide member 8 so that the second indicator portion 8 is visually recognized.

  As described above, according to the present embodiment, the light guide member 8 surrounding the predetermined region R is laminated on the front surface of the flat light guide 7, and the side of the light guide member 8 facing the flat light guide 7. By providing the second indicator portion (design portion) 4 that forms at least a part of the instrument design on the light guide member 8 as compared with the case where the design portion is formed by printing on a flat plate as in the past. Since the second indicator portion 4 appears to float through, a three-dimensional effect and a sense of depth can be given to the way the second indicator portion 4 is seen, and a high-class feeling can be created, and the merchantability can be improved.

  In particular, in the present embodiment, a stereoscopic effect and a sense of depth can be given to the appearance of the second indicator portion 4 in combination with the effect of floating feeling due to the disposition of the background plate 10 and the flat light guide 7. , The merchantability can be further improved.

  Further, according to the present embodiment, the cross-sectional shape of the light guide member 8 is a shape in which the thickness gradually decreases from the outside to the inside, thereby suppressing the occurrence of steps or shadows caused by the stacking of components. , Can eliminate the sense of incongruity and miscellaneousness caused by component stacking, and improve aesthetics. In addition, although the cross-sectional shape of the light guide member 8 is preferably a triangular shape, the shape is arbitrary as long as the thickness is reduced from the outside to the inside. In the present embodiment, the planar shape of the light guide member 8 is a ring shape, but any shape can be selected as long as the shape surrounds the predetermined region R.

  In addition, according to the present embodiment, by providing the light shielding portion 83 on the outer periphery of the light guide member 8, the inside can be seen through the light guide member 8, or the internal illumination light can be prevented from traveling toward the viewer. be able to. In addition, the light-shielding part 83 can also be provided only in a required part.

  Further, according to the present embodiment, the number of parts can be reduced by integrally forming the light shielding portion 83 as a part of the light guide member 8.

  The light shielding portion 83 may be integrally formed as a part of the light guide member 8 or may be attached as a light shielding film by printing, painting, transferring, sticking, or joining to the light guide member 8. The light shielding portion 83 may be formed by coupling the light shielding material to the light guide member.

The front view of the instrument display apparatus by one Embodiment of this invention. Sectional drawing along the AA line in FIG. Sectional drawing of the light guide member by embodiment same as the above. It is a perspective view which laminated the light guide member on the flat light guide in the embodiment same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instrument display device 2 Pointer 3 1st parameter | index part 4 2nd parameter | index part 5 Indicator 6 Look-back 6a Opening 7 Flat light guide 7a Reflective surface 7b 1st reflective layer 7c 2nd reflective layer 7d Through-hole 8 Light guide member 8a Bottom surface 8b Side surface 8c Front surface 9 Background plate 10 Frame 10a Light shielding wall portion 11 Circuit board 12, 23 Light source 13a, 13b Holding member 14 Light guide body 15 Shield member 15a Reflecting surface 16 Pointer drive device 16a Pointer shaft 17 Display element 18 Holder 19 Light Source 20 Flexible Wiring Board 21 Frame 22 Window 81 Light-shielding Layer 82 Reflective Layer R Predetermined Area

Claims (3)

In an instrument display device that displays a predetermined instrument design on a flat light guide, a light guide member surrounding a predetermined region of the instrument design is laminated on the front surface of the flat light guide, and the flat plate of the light guide member A design in which at least a part of the instrument design is formed by providing a light-shielding layer on the side facing the light guide and providing a reflective layer on the light-shielding layer, and partially printing out the light-shielding layer and the reflective layer. An instrument display device characterized by comprising a section. A light-shielding portion is provided on the outer periphery of the light guide member, and the bottom surface of the light-shielding portion and the bottom surface of the light guide member on the side facing the flat light guide are continuously formed without any step, and on both the bottom surfaces The instrument display device according to claim 1, wherein the light shielding layer and the reflective layer are provided . The instrument display device according to claim 1 , wherein a reflection layer is provided on a back surface of the flat light guide and corresponding to the light guide member .

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