JP4379812B2 - Indicating instrument - Google Patents

Description

    The present invention relates to an indicating instrument that is mounted on, for example, a special vehicle such as a construction machine, a marine vessel, an automobile, a motorcycle, or the like, and illuminates a display board with an irradiation beam from a light source.

  2. Description of the Related Art Conventionally, as an indicating instrument for an automobile or the like, as a general configuration of an indicating instrument that transmits and illuminates a display board with a light beam emitted from a light source, as shown in FIGS. A pointer 3 which is fixed to the side and rotates around the rotation shaft 2, and a display board 5 which is provided on the back side of the pointer 3 and which is provided with an indicator portion 4 made of transmitted graduations, numerals, symbols, etc .; A hard circuit board 6 positioned on the back side of the display board 5, light emitting diodes 7 and 8 provided on the circuit board 6 and illuminating the display board 5, and the pointer 3, respectively, are illuminated. A housing 9 made of a synthetic resin frame that divides an illumination area on the light emitting diode 8 side for illuminating the light emitting diode 7 and the display board 5 side, and a cylindrical partition wall provided on the housing 9 9A and each lighting It is configured to partition the area that. The instrument body 1 that rotates the rotating shaft 2 is attached and fixed behind the circuit board 6.

  The pointer 3 is integrally formed of a transparent synthetic resin with an indicator 10 and a pointer base 11 fixed to the rotary shaft 2, and the pointer base 11 is covered with a pointer cap 12 made of a light-shielding synthetic resin. The instruction unit 10 receives light from the light emitting diode 7 and emits light.

  The display board 5 is composed of a flat substrate made of a transparent synthetic resin, and a white translucent display layer 4A, for example, is provided on the surface (upper surface in the figure) at four index portions such as scales, numbers, or symbols. A light-shielding black ground color layer (light-shielding layer) 4B is formed on the entire surface of the display panel 5 except for the four indicator portions.

  A plurality of light emitting diodes 7 for emitting the pointer are located inside the cylindrical partition wall 9 </ b> A and are provided around the rotating shaft 2 in a circular shape around the rotating shaft 2. Is guided inside the cylindrical partition wall 9A. A plurality of light emitting diodes 8 that transmit and illuminate the indicator portion 4 of the display board 5 are provided around the outside of the cylindrical partition wall 9 </ b> A in a circular shape, and the irradiation light from the light emitting diode 8 is used as the indicator portion of the display board 5. A light guide 14 for guiding to the side 4 is disposed, and the light guide 14 is supported by a light case 9B formed integrally with the housing 9 made of the frame.

  By configuring in this way, in the conventional indicating instrument, only the letters, numbers, scales, symbols, etc., which are the indicator portions 4 on the surface side of the display board 5 are transmitted and illuminated by the light source from the back side. For this reason, although not shown in the figure, characters, numbers, scales, symbols, etc., which are indicator parts, and the entire surface of the display board, which is the background part of the display board, are transmitted and illuminated by a light source provided on the back side of the display board, or Various illumination means are known such as a light source provided on the front side of the display panel to illuminate directly or by illuminating the display panel with indirect light, or a combination of these illumination methods. Both result in a flat and monotonous illumination form.

Considering this point, as shown in, for example, Patent Document 1 as a transmitted illumination type indicator that has a different appearance in the daytime and at night, and can feel a sense of depth, A translucent substrate and a transmitted light adjusting layer formed on the back side of the translucent substrate, the transmitted light adjusting layer transmitting the amount of light transmitted from the back side of the dial to the front side There has been proposed a transmitted illumination type indicating instrument configured to be gradually changed along a plane of a transmissive substrate. A color printing layer is formed on the surface side of the transmitted light adjustment layer.
JP-A-9-96546

  By the way, in the indicating instrument which consists of patent documents 1 etc., at the time of illumination of a dial, the light of the light source which entered the transmitted light adjustment layer is adjusted in the amount of transmitted light by the transmitted light adjustment layer. The light is transmitted through the translucent substrate and the color printing layer in this order and emitted to the dial surface side. Here, the transmission light adjustment layer is configured by printing with gradation display so that the transmission amount of light transmitted from the dial back side to the front side is gradually changed along the plane of the transparent substrate. Compared to this indicator instrument, there is an effect that the appearance is improved due to the gradation display effect, but on the other hand, it tends to be a monotonous illumination form based on shading corresponding to the gradation display form, resulting in lack of novelty.

  Therefore, in order to cope with the above-described problems, an object of the present invention is to provide a novel transmitted light type indicating instrument that can improve the appearance of the entire display panel in addition to the transmitted illumination of the indicator section.

  In order to solve the above-described problems, the present invention is characterized in that in the first aspect of the present invention, the pointer fixed to the tip end side of the rotating shaft provided in the instrument body and the back side of the area where the rotation of the pointer is instructed. In an indicating instrument comprising: a display plate provided with an indicator portion by printing that includes a light shielding layer portion and a transmission layer portion; and a light source provided behind the display plate. The display board is provided with a transmissive printing layer separately from the area of the indicator portion provided on the display board and capable of transmitting illumination, and the amount of light transmitted through the display board in the area of the transmissive printing layer is A transmission light amount adjustment layer composed of a light-shielding print layer with gradation that enables the display plate to be transmissively illuminated so that the brightness gradually changes is provided on the front side of the transmission print layer, and is transmitted between the light source and the display plate. A translucent substrate that can be The gender substrate, a indicating instrument, characterized by comprising performing diffuse transmission adjustment layer substantially match the region of the transmitted light amount adjusting layer according to the gradation.

  According to a second aspect of the present invention, in the indicating instrument according to the first aspect, the transmitted light amount adjustment layer including a light-shielding print layer by gradation that enables the display plate to be transmissively illuminated is directed from the axis of the rotation axis toward the outer peripheral direction. The amount of light transmitted through the display board is given so that the brightness gradually changes.

  According to a third aspect of the present invention, in the indicating instrument according to the first or second aspect, a gradation display region having a large amount of transmitted light from the light source in a region formed by printing the transmitted light amount adjustment layer by the gradation is supported. The translucent substrate portion is provided with a see-through portion in which the diffuse transmission adjusting layer is partially removed.

  According to a fourth aspect of the present invention, in the indicating instrument according to the third aspect, the surface portion of the see-through portion where the diffuse transmission adjustment layer printed on the light-transmitting substrate is partially removed is subjected to a graining process. It is characterized by.

  According to a fifth aspect of the present invention, in the indicating instrument according to any one of the first to fourth aspects, the diffuse transmission adjusting layer is formed of a transmissive light control layer.

  According to a sixth aspect of the present invention, in the indicating instrument according to any one of the first to fifth aspects, the display plate and the translucent substrate are arranged with a predetermined space therebetween. is there.

  According to a seventh aspect of the present invention, in the indicating instrument according to the sixth aspect, a rising peripheral wall is provided at a peripheral portion of the translucent substrate, and the rising peripheral wall is abutted against the back surface of the display plate. It is what.

  Further, according to claim 8, in the indicating instrument according to claims 1 to 7, a synthetic resin housing that surrounds the periphery of the light source and divides into an illumination area for transmitting and illuminating the display board is provided. The translucent substrate and the display plate are attached and fixed on a housing.

  According to a ninth aspect of the present invention, in the indicating instrument according to the eighth aspect of the present invention, the translucent substrate is provided with a positioning portion, and is positioned and held on the housing by the positioning portion.

  In the present invention, the display board is provided with a transmissive printing layer separately from the area of the indicator portion provided on the display board and capable of transmissive illumination, and the display board is transmitted through the area of the transmissive printing layer. A transmission light amount adjustment layer composed of a light-shielding print layer by gradation that enables the display plate to be transmissively illuminated so that the brightness gradually changes in brightness is applied to the front side of the transmission print layer, and between the light source and the display plate A transmissive substrate capable of transmitting light is provided, and the transmissive substrate is provided with a diffuse transmission adjustment layer substantially matched with the region of the transmission light amount adjustment layer based on the gradation. Therefore, the amount of light can be adjusted with emphasis when the light transmitted from the light source is irradiated to the transmitted light amount adjustment layer by gradation provided on the display board by the diffuse transmission adjustment layer provided on the translucent substrate. Bright due can be transmitted illumination to stand out the lighting effect, it can provide a good indication instrument visibility with depth feeling than the conventional, thereby achieving the intended purpose.

  According to the first aspect of the present invention, the pointer fixed to the distal end side of the rotating shaft provided in the meter body, and disposed behind the area where the rotation of the pointer is instructed, is transmitted through the light shielding layer portion. In an indicating instrument comprising: a display board that is printed with a layer portion and provided with an indicator portion; and a light source provided on the back side of the display board, the display board includes the display board The display board is provided with a transmissive printing layer separately from the indicator area where transmission illumination is provided, and the brightness gradually changes in the amount of light transmitted through the display board in the area of the transmissive printing layer. A transmission light amount adjustment layer composed of a light-shielding print layer by gradation that enables transmission illumination is provided on the front side of the transmission print layer, and a transparent substrate that can transmit between the light source and the display board is disposed, The translucent substrate has the gradation described above. Since it is an indicator instrument characterized by having a diffuse transmission adjustment layer substantially aligned with the area of the transmitted light adjustment layer, the light from the light source is provided on the display board by the diffusion transmission adjustment layer provided on the translucent substrate. The amount of light can be adjusted with emphasis when illuminating the transmitted light amount adjustment layer by gradation, so that the illumination effect by gradation lighting can be radiated to stand out, and in addition to the gradation by gradation display, diffuse transmission A visually deep lighting effect can be expected by setting the transmission amount of the adjustment layer.

  Further, in the indicating instrument according to claim 1, the transmitted light amount adjustment layer composed of a light-shielding printing layer by gradation that enables the display plate to be transmissively illuminated is arranged so that the display plate is directed from the axis of the rotation axis toward the outer peripheral direction. By making the amount of transmitted light gradually change in brightness, it is possible to realize transmission illumination consisting of light and shade concentrically, and by setting the light transmission amount of the diffuse transmission adjustment layer in addition to light and shade by gradation display A visually deep lighting effect can be obtained. (Claim 2)

  The indicator according to claim 1 or 2, wherein the light transmission corresponding to a gradation display region having a large amount of light transmitted from the light source in a region formed by printing the transmitted light amount adjustment layer by the gradation. The transparent substrate portion is provided with a see-through portion in which the diffuse transmission adjustment layer is partially removed, so that the brightness can be further increased by directly irradiating the back side of the display plate with the irradiation light from the light source. Therefore, it is possible to emphasize the transmission illumination effect due to the shading. (Claim 3)

  Further, in the indicating instrument according to claim 3, the surface portion of the see-through portion where the diffuse transmission adjustment layer printed on the light-transmitting substrate is partially removed is subjected to a graining process. The light-transmitting substrate has a problem that the unevenness of illumination is caused by the illumination effect due to the transmission of the part provided on the display board. By applying, the display panel can be uniformly diffused to illuminate the display board, and an easy-to-see indicator instrument can be provided. (Claim 4)

  Further, in the indicating instrument according to any one of claims 1 to 4, the diffuse transmission adjustment layer is formed of a transmissive light control layer, so that light can be adjusted without reducing luminance as much as possible. There is an effect that can be done. (Claim 5)

  Further, in the indicating instrument according to any one of claims 1 to 5, the display plate and the translucent substrate are arranged on a side closer to the light source by being installed with a predetermined space. A locally strong light beam that is directly irradiated onto the transmitted light amount adjustment layer of the plate can be irradiated in a softened state by securing a space portion, and an easy-to-see indicator instrument can be provided. (Claim 6)

  The indicator instrument according to claim 6, wherein a rising peripheral wall is provided at a peripheral edge portion of the translucent substrate, and the rising peripheral wall is abutted against the back surface of the display plate, thereby providing a predetermined space. The display plate can be set on the light-transmitting substrate while ensuring, and there is an effect that the assembling can be easily performed while improving the illumination effect. (Claim 7)

  The indicator instrument according to any one of claims 1 to 7, further comprising a synthetic resin housing that surrounds the light source and divides into an illumination area for transmitting and illuminating the display plate. By mounting and fixing the translucent substrate and the display plate, the translucent substrate and the display plate can be easily set on the housing while securing a predetermined space. (Claim 8)

  The indicator instrument according to claim 8, wherein the translucent substrate is provided with a positioning portion, and is positioned and held on the housing by the positioning portion, so that it can be easily assembled and held at a predetermined position. Can do. (Claim 9)

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the indicating instrument of the present invention is applied to a vehicle (automobile) indicating instrument will be described below with reference to the accompanying drawings. The same reference numerals are used for the same or corresponding parts as those in the conventional example described above.

  A first embodiment of the present invention is shown in FIGS. In the figure, the pointer 3 is fixed to the distal end side of the rotary shaft 2 of the meter body 1 and rotates around the rotary shaft 2 and the scale, numbers, symbols, etc., which are located on the back side of the pointer 3 and are transmissively illuminated. A display board 5 provided with an indicator section 4, a hard circuit board 6 made of glass epoxy resin located on the back side of the display board 5, and a pointer 3 and a display board provided on the circuit board 6, respectively. The light emitting diodes 7 and 8 that are light sources for illuminating 5 and the respective instrument bodies 1 and display devices are partitioned, and the light emitting diode 7 for illuminating the pointer 3 and the illumination area for illuminating the display board 5 side Are divided into areas to be illuminated by a housing 9 made of a synthetic resin frame and a cylindrical partition wall 9A provided in the housing 9. An instrument body 1 that rotates the rotary shaft 2 is fixedly attached to the back of the circuit board 6.

  The pointer 3 is integrally formed of a transparent synthetic resin with an indicator 10 and a pointer base 11 fixed to the rotary shaft 2, and the pointer base 11 is covered with a pointer cap 12 made of a light-shielding synthetic resin. The instruction unit 10 is configured to receive light from the light emitting diode 7 and emit light.

  The display board 5 is composed of a flat substrate made of a transparent synthetic resin, and a white translucent display layer 4A, for example, is provided on the surface (upper surface in the figure) at four index portions such as scales, numbers, or symbols. The light-blocking black ground color layer 4B is formed on the entire surface of the display panel 5 except for the four indicator portions.

  A plurality of light emitting diodes 7 for light emission of the pointer are located inside the cylindrical partition wall 9A, and are provided in a plurality of concentric circles around the rotation shaft 2 in the vicinity of the rotation shaft 2. A light guide 13 for guiding the pointer 3 toward the pointer base 11 is disposed inside the cylindrical partition wall 9A. Further, a plurality of light emitting diodes 8 that transmit and illuminate the indicator portion 4 of the display panel 5 are provided outside the cylindrical partition wall 9A so as to surround the rotating shaft 2 in a circular shape. A light guide 14 for guiding the irradiated light beam toward the indicator portion 4 side of the display board 5 is disposed, and the light guide 14 and the light guide 13 for pointer illumination are integrated with each other via a connecting portion 15. The light guides 13 and 14 are supported by a light case 9B formed integrally with the housing 9 made of the frame.

  The light guide 14 for display board illumination and the light guide 13 for pointer illumination are located between the display board 5 and the circuit board 6 and are made of a light-transmitting synthetic resin such as polycarbonate or acrylic. In the embodiment, a colorless and transparent material having no color is used.

  As shown in FIG. 1, in an instrument device comprising a speedometer located in the center, the light guide 14 receives a light from a light emitting diode 8 serving as a light source, and a light received by the light receiving unit 14A. Is provided with a reflecting surface 14B and an exit surface 14C so as to guide the light toward the indicator portion 4 provided on the display plate 5, and the light received by the light receiving portion 14A and guided into the light guide 14 is received. The light is reflected and guided by the reflecting surface 14B so as to be guided to the indicator portion 4 side of the display plate 5, and the irradiation light is guided from the exit surface 14C to the back surface side of the display plate 5 corresponding to the indicator portion 4, and the indicator portion of the display plate 5 is displayed. 4 is configured to transmit light. In this embodiment, the peripheral portion on the inner surface side of the light case 9B is curved toward the display panel 5 side, and is emitted from the emission surface 14C of the light guide 14 by the curved inner surface portion. The light beam is configured to be reflected and guided toward the indicator portion 4 side.

  The display board 5 is provided with a transmissive printing layer 16 made of, for example, green transmissive ink, in addition to the transparent illumination indicator portion 4 provided on the display board 5, and the transmissive printing layer. Transmitted light amount adjustment composed of a shading print layer (black non-transparent ink) by gradation such as a halftone dot pattern that enables transmission illumination so that the light amount transmitted through the display board 5 gradually changes in brightness in 16 areas The layer 17 is formed on the front side of the transmissive printing layer 16. In this case, the transmitted light amount adjustment layer 17 formed of a light-shielding printing layer by gradation that enables the display panel 5 to transmit illumination realizes transmitted illumination that is substantially concentric from the axis of the rotating shaft 2 toward the outer periphery. The gradation display area is set so that the amount of light transmitted through the display board 5 is gradually changed so that the brightness can be changed. In this embodiment, the axis of the rotary shaft 2 is used during transmission illumination. The transmission light amount adjustment layer 17 composed of a light-shielding print layer by gradation is applied on the transmission print layer 16 so that the brightness gradually decreases from the outer periphery toward the outer periphery. In this embodiment, the transmitted light amount adjusting layer 17 composed of a black light-blocking print layer printed and formed in the gradation display area and the black ground color layer 4B printed and formed around the area other than the index part 4 area are printed in the same manner. Although printing is performed in the process, printing may be performed in separate processes.

  Further, a light source for transmitting and illuminating four indicator portions of the display board 5 and 16 transmission printing layers in the gradation display area so that the light quantity transmitted through the display board 5 is gradually changed in brightness. An s-transmissive substrate 18 made of a synthetic resin material such as acrylic resin is disposed between the light-emitting diode 8 and the rear side of the display plate 5. A diffusive transmission adjustment layer 19 made of a transparent ink having a white color shade is applied to match the display areas of the transmission printing layer 16 and the transmission light amount adjustment layer 17 by gradation display.

  Further, on the translucent substrate 18, the translucent substrate 18 corresponding to the gradation display region having a large amount of transmitted light that is transmitted and illuminated in the region formed by printing the transmitted light amount adjusting layer 17 by gradation provided on the display plate 5. By providing a transparent portion 19A in which the diffuse transmission adjustment layer 19 is partially removed in an arc shape at the location, that is, at the location of the translucent substrate 18 located on the side close to the axis of the rotary shaft 2, the transparent portion By directly irradiating the back side of the display panel 5 with the light beam emitted from the light emitting diode 8 as a light source by 19A, the luminance can be further increased, and the transmitted illumination effect due to shading can be emphasized.

  Further, the surface portion of the see-through portion 19A where the diffuse transmission adjustment layer 19 printed on the light-transmitting substrate 18 is partially removed is subjected to a graining process 20 so that it is closer to the light-emitting diode 8 that is a light source. The light-transmitting substrate 18 is subjected to the graining process 20 with the problem that it is likely to become partly bright at the point of, and uneven illumination occurs due to the illumination effect due to the transmission of the part provided on the display board 5. Thus, it is possible to illuminate the display panel 5 with uniform diffusion.

  Further, a rising peripheral wall 18A is provided at the peripheral edge of the translucent substrate 18, and the rising peripheral wall 18A is configured to abut against the back surface of the display panel 5. That is, it is configured such that a predetermined space S can be arranged and installed between the display plate 5 and the translucent substrate 18 by the rising peripheral wall 18A, while ensuring the predetermined space S. The display board 5 can be set on the translucent substrate 18 so that the lighting effect can be improved and the assembling can be easily performed.

  At this time, the translucent substrate 18 is integrally provided with the positioning portion 18B, and the receiving portion 9C is provided at nine locations of the housing corresponding to the position of the positioning portion 18B. When the 18 is set and assembled, the positioning portion 18B of the translucent substrate 18 and the receiving portion 9C provided in the housing 9 can be easily positioned and held at a predetermined position while being aligned. The problem of assembly can be solved in advance.

  Reference numeral 21 denotes a turn-back panel that is blindfolded so that the inside of the indicating instrument cannot be seen from the peripheral portion of the display board 5 or the like.

  Further, in the illumination device for the indicating instrument in the first embodiment having the above-described configuration, the light beam emitted from the light emitting diode 7 for emitting the pointer light passes to the pointer base 11 provided on the pointer 3 via the light guide 13. The indicator 10 emits light.

  The light beam emitted from the light emitting diode 8 for light emission on the display panel enters the light guide body 14 upward from the light receiving portion 14A of the light guide body 14, is reflected by the reflecting surface 14B, and is guided in the lateral direction. Then, a light beam is emitted from the exit surface 14C of the light guide 14 to the light case 9B, and the emitted light beam is reflected by a curved portion provided on the inner surface side of the light case 9B. 4, the translucent display layer 4 </ b> A of the indicator unit 4 is brightly transmitted and illuminated in white by the irradiated light.

  In addition, along with the transmitted illumination of the indicator portion 4 (semi-transmissive display layer 4 </ b> A) of the display board 5, the light emitted from the light-emitting diode 8 is partially above the light-emitting diode 8. Light transmission from the position to the outside of the light guide 14, the diffuse transmission adjustment layer 19 on which the leaked irradiation light is printed on the translucent substrate 18 and the see-through portion 19 </ b> A where the diffusion transmission adjustment layer 19 is partially removed Is transmitted to the gradation display area provided on the display plate 5 while irradiating the light, and the transmitted light amount formed by the gradation light-shielding print layer so that the brightness gradually decreases from the axial center of the rotating shaft 2 toward the outer periphery during transmission illumination. While the amount of transmitted light is set by the adjustment layer 17, the green hue of the transmissive print layer 16 is transmitted and illuminated as it is.

  In this case, on the translucent substrate 18, the translucency corresponding to the gradation display region having a large amount of transmitted light to be transmitted and illuminated in the region formed by printing the transmitted light amount adjusting layer 17 by gradation provided on the display plate 5. By providing a see-through portion 19A in which the diffuse transmission adjustment layer 19 is partially removed in an arc shape at 18 places on the substrate, that is, 18 places on the translucent substrate located on the side close to the axis of the rotary shaft 2, the see-through portion 19A is provided. Since the irradiation light from the light emitting diode 8 is directly irradiated to the back side of the display board 5 by the part 19A, this maintains a state where the brightness is further partially increased in addition to the normal gradation printing. It is possible to transmit and illuminate, and at the place where the diffuse transmission adjustment layer 19 is applied, the amount of irradiation light is suppressed by the diffusion transmission adjustment layer 19, so that Gradient display area shading due can highlight the transmitted illumination effect in, it can be expected lighting effects visually deep by setting the transmittance of the diffuse transmission adjustment layer 19 in addition to the shading by gradient display.

  Further, in the region of the diffuse transmission adjustment layer 19 applied to the translucent substrate 18, the surface portion of the see-through portion 19 </ b> A where the diffusion transmission adjustment layer 19 is partially removed is subjected to the graining 20. The problem is that the portion closer to the light emitting diode 8 (the side closer to the light source) tends to be partially bright, and illumination unevenness occurs due to the illumination effect due to the transmission of the portion provided on the display board 5. By applying the graining process 20 to the surface of the translucent substrate 18, it is possible to suppress locations that are likely to be locally bright, and to uniformly illuminate and illuminate the display panel 5.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, in each of the above-described embodiments, a light emitting diode is used as a light source. The light source may be a lamp or a cold-cathode tube, and the number of light sources and installation positions may be set in accordance with the thickness and shape of the light guide 14. In the embodiment, the light guide 14 is formed to be colorless and transparent. However, in some cases, the light guide 14 is colored and formed depending on the color of the indicator portion 4 provided on the display board 5 or the transparent print layer 16 applied to the gradation display region. Depending on the conditions, the light guide may be removed, and the light beam from the light source may be transmitted and illuminated directly to the translucent substrate 18 and the display panel 5.

  In addition, if the indicator does not need to illuminate the pointer 3, it is not necessary to provide the light-emitting diode 7, but a light-emitting diode 8 that is a light source dedicated to the display board 5 may be provided. 18, the rising peripheral wall 18 </ b> A is provided almost continuously at the peripheral edge portion, but the rising peripheral wall 18 </ b> A is partially protruded to be partially abutted against the back surface of the display panel 5. However, the same effect can be obtained, and the positioning portions 18B are integrally provided at appropriate positions (one place) on the periphery of the translucent substrate 18. However, the number of the positioning portions 18B and the arrangement / The shape and the like may be set as appropriate.

  Further, as a gradation display form provided on the display board 5, in the embodiment, a gradation display composed of a dot pattern according to the degree of shading of the transmitted light amount adjustment layer 17 is formed concentrically with the pointer shaft 2 as an axis. In addition, the present invention is not limited to the shape and print pattern of the embodiment, and may be formed as a gradation display form based on an elliptical shape, a shape, or a linear gradation, and is not limited to a dot pattern, but a gradation based on a halftone dot pattern. Modifications such as display printing are possible. In addition, by forming the diffuse transmission adjustment layer 19 on the translucent substrate 18 according to the gradation display shape by means of printing or the like, the gradation display in which the light from the light source 8 is provided on the display plate 5 at the time of transmission illumination. The amount of light can be adjusted with emphasis when irradiating the transmitted light amount adjustment layer 17 by, and the transmitted light can be illuminated so that the illumination effect by the gradation illumination is conspicuous. Thus, the lighting effect of the display panel 5 having a good appearance can be brought about, whereby a novel lighting device can be provided.

  In the embodiment, the semi-transparent display layer 4A and the light-shielding ground color layer 4B of the indicator unit 4 provided on the display panel 5, printing of the transmissive print layer 16 and the transmitted light amount adjustment layer 17 that form a gradation display form, etc. Is provided on the front surface side of the display board 5, but may be printed on the back surface side or may be printed separately on the front and back surfaces, and is formed by punching printing that is not partially colored. In addition, the hue of each printing layer is not limited to the embodiment, and various hues such as a transmitted illumination color can be appropriately set.

  Further, as described in detail in the above-described embodiments, the illumination device for the instrument has been described by taking the indicator instrument for the vehicle as an example. However, the present invention is not limited to the instrument for the vehicle, but can be applied to the instrument for ships or the instrument for agricultural machinery. Is possible.

FIG. 1 is a front view showing an indicating instrument for a vehicle in the first embodiment of the present invention. FIG. 2 is an enlarged front view of the main part of the indicating instrument in which the display board of FIG. 1 is partially cut away. FIG. 3 is a cross-sectional view showing a main part of the illumination device in the indicating instrument of FIG. 4 is an enlarged cross-sectional view of a main part of the illumination device in the indicating instrument of FIG. FIG. 5 is a front view showing a conventional indicating instrument. 6 is a cross-sectional view showing a main part of the illumination device in the indicating instrument of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instrument main body 2 Pointer axis 3 Pointer 4 Indicator part 4A Semi-transparent display layer 4B Ground color layer 5 Display board 6 Circuit board 7 Light emitting diode (light source)
8 Light-emitting diode (light source)
DESCRIPTION OF SYMBOLS 9 Housing 9A Partition wall 9B Light case 9C Receiving part 10 Instruction part 11 Pointer base part 12 Pointer cap 13 Light guide body 14 Light guide body 15 Connection part 16 Transmission printing layer 17 Transmission light quantity adjustment layer 18 Translucent substrate 18A Standing peripheral wall 18B Positioning Part 18C Perspective part 19 Diffusion transmission adjustment layer 20 Texture processing 21 Turn-up panel S space

Claims (9)

  A pointer fixed to the tip end of the rotating shaft provided on the instrument body and a position behind the area where the pointer is instructed to rotate, are printed with a light shielding layer portion and a transmission layer portion. In the indicating instrument comprising a display board provided with an indicator portion and a light source provided behind the display board, the display board can transmit illumination provided on the display board. Separately from the indicator area, a transmissive printing layer is provided, and the display board is transmissively illuminated so that the amount of light transmitted through the display board gradually changes in brightness in the transmissive printing layer area. A transmission light amount adjustment layer composed of a light-shielding print layer is applied to the front side of the transmission print layer, and a translucent substrate that can transmit between the light source and the display plate is disposed. Area of transmitted light amount adjustment layer by gradation Indicating instrument, characterized by comprising performing diffuse transmission adjustment layer substantially combined.   The transmitted light amount adjustment layer composed of a light-blocking print layer with gradation that enables the display plate to transmit illumination is changed such that the light amount transmitted through the display plate gradually changes from the axis of the rotation axis toward the outer peripheral direction. The indicating instrument according to claim 1, wherein the indicating instrument is provided.   In the region formed by printing the transmitted light amount adjustment layer by gradation, the diffuse transmission adjustment layer is partially removed from the transparent substrate portion corresponding to the gradation display region where the transmitted light amount from the light source is large. The indicator instrument according to claim 1, further comprising a see-through unit.   The indicator instrument according to claim 3, wherein the indicator part is subjected to a graining process on a surface part of the see-through part where the diffuse transmission adjusting layer printed on the translucent substrate is partially removed.   The indicator instrument according to any one of claims 1 to 4, wherein the diffuse transmission adjustment layer is formed of a transmissive light control layer.   6. The indicating instrument according to claim 1, wherein the display board and the translucent substrate are installed with a predetermined space.   The indicator instrument according to claim 6, wherein a rising peripheral wall is provided at a peripheral portion of the translucent substrate, and the rising peripheral wall is abutted against the back surface of the display plate.   A synthetic resin housing that surrounds the light source and divides into an illumination area for transmitting and illuminating the display plate is provided, and the translucent substrate and the display plate are attached and fixed on the housing. 8. The indicating instrument according to claim 1, wherein the indicating instrument is characterized by the following.   The indicating instrument according to claim 8, wherein the translucent substrate is provided with a positioning portion, and is positioned and held on the housing by the positioning portion.

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