JP5569358B2 - VEHICLE INSTRUMENT AND MANUFACTURING METHOD THEREOF - Google Patents

Description

  The present invention relates to a vehicle instrument that employs edge light illumination that introduces illumination light into the display panel from an edge portion of the display panel on which a scale is formed, and a method for manufacturing the same. In particular, the present invention relates to a vehicular instrument in which a three-dimensional display portion formed of a depression is formed on the back surface of a display plate and the display portion of the display plate is visually recognized in three dimensions, and a manufacturing method thereof.

  Conventionally, the vehicle instrument of patent document 1 is known. FIG. 10 is a front view showing a vehicle instrument of Patent Document 1, and FIG. 11 is a partial cross-sectional view taken along the arrow F11-F11 in FIG. In the vehicular instrument shown in FIG. 10, the pointer 4 is driven by the movement 20 on the back side of the display board 1 and rotates as shown in FIG. Illumination light is introduced into the display panel 1 from the direction of the arrow Y11 that is perpendicular to the thickness direction of the display panel 1 (also referred to as a scale dial). Such illumination is called edge light illumination.

  A plurality of light emitting diodes 8 (hereinafter also referred to as LEDs 8) are arranged in a row with respect to the edge portion 3 of the display panel 1 of FIG. The illumination light emitted from the plurality of LEDs 8 is reflected by the inner surface of the meter case and guided into the display panel 1 made of acrylic resin. The pointer 4 is driven by a movement 20 such as a motor and points to the notation 5 (FIG. 10) printed on the back surface of the transparent display panel 1.

JP 2010-85113 A

  The notation part 5 printed on such a display board 1 cannot be seen three-dimensionally as it is. However, in recent years, there is a demand for producing a three-dimensional appearance of a vehicle instrument and a demand for changing the appearance of day and night.

  In the above-mentioned Patent Document 1, an indicator consisting of the notation portion 5, the scale, and the unit is printed on the back surface of the display plate 1, and illumination light is introduced into the display plate 1 from the edge portion 3 of the display plate 1. Since the index is printed on the back surface, the back surface of the display board 1 must be flat as a whole.

  In order to make the indicator appear three-dimensional, a method based on the so-called shading method, which is designed to make the indicator appear three-dimensional by shading, and a three-dimensional component on the display board, the indicator is made three-dimensional. The method to show to was thought. The method of adding a three-dimensional component on the display board to make the index appear three-dimensional is not preferable because of an increase in cost. Therefore, a method of drawing a shadow portion on the shape of the notation portion 5, particularly the shape of the number portion, and making it three-dimensional in illustration was considered. This method is effective for the appearance of daytime, but is less effective at night illumination.

  Further, when the display board 1 itself is molded, it is conceivable that the index of the notation portion 5 and the like is raised and molded so as to make it appear three-dimensional. However, when a part of the display panel 1 is three-dimensionally raised and molded, the index printed on the back surface is affected by distortion during molding, or by the influence of sink marks on the molding material. Since it was formed in the display board 1, it was not preferable. Furthermore, even if it looks three-dimensional without any problems, it is not possible to satisfy the demand for changing the appearance between day and night.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to change the appearance between day and night, and the notation printed on the display board. It is to provide a vehicle instrument that has a three-dimensional appearance and a manufacturing method thereof.

  The contents of Patent Document 1 listed as the prior art can be introduced or incorporated by reference as an explanation of the technical elements described in this specification.

In order to achieve the above object, the present invention employs the following technical means. That is, according to the first aspect of the present invention, there is provided an edge light illumination type vehicle instrument for introducing illumination light into the display board from the side of the display board, which is printed on the back side of the display board and serves as an index. And a three-dimensional display unit that is provided on the back side of the display plate and displays the notation unit in a three-dimensional manner. The three-dimensional display unit is recessed from the back side to the front side of the display plate, with respect to the plane direction of the display plate A recess having an inclined surface inclined from the back side to the front side, and the recess is adjacent to the notation portion , and is a vertical surface rising in a direction perpendicular to the plane direction and an opening on the back side of the display plate And a V-shaped dent having a V-shaped cross section having an inclined surface formed on the front side of the vertical surface, and a part of the notation portion is printed on the vertical surface. and, the illumination light introduced through the edge portion of the display plate, denoted as the inclined surface It is characterized by being reflected toward the surface side of the display panel by the.

According to this invention, the three-dimensional display unit is formed of a dent that is recessed from the back surface side to the front surface side of the display plate and has an inclined surface that is inclined from the back side to the front side with respect to the planar direction of the display plate. Has a V-shaped cross section having an opening-side depression having a vertical surface rising in a direction perpendicular to the plane direction and an opening on the back side of the display panel, and an inclined surface formed on the front side of the vertical surface. Since the illumination light introduced through the edge part of the display board is reflected by the inclined surface and the notation part and is directed to the surface side of the display board, the notation part is three-dimensional by the three-dimensional display part. Visible to. Further, the illumination light guided to the inside of the display board via the edge part of the display board is reflected on the inclined surface, and the stereoscopic display part is illuminated and viewed at night. In addition, since the vertical surface is formed, even if the printed notation enters the recess and covers the vertical surface, it does not cover the inclined surface and reflects the illumination light more reliably on the inclined surface. Can do. In addition, when edge light illumination is not performed, the inclined surface scatters extraneous light. Thus, the appearance can be changed between day and night, and the notation portion printed on the display board can be provided by the stereoscopic display portion so that the vehicle instrument can be seen stereoscopically. In addition, due to the vertical surface 11, when printing the notation portion, the printing portion of the notation portion sticks to the vertical surface and prints on the inclined surface even if printing is shifted due to the printing process capability and printing is performed in the depression. Therefore, the illumination light reflection performance on the inclined surface is not adversely affected.

  The invention according to claim 2 is characterized in that the three-dimensional display portion is formed on the opposite side of the display plate in the plane direction with respect to either the left or right side of the display board.

  According to the present invention, the stereoscopic display unit is formed on the opposite side of the display plate with the notation unit sandwiched in the plane direction with respect to either the left or right side of the display board. Easy to see.

  The invention according to claim 3 is characterized in that a contour line indicating the contour of the notation portion is formed on the opposite side of the three-dimensional display portion with the notation portion in the plane direction interposed therebetween.

  According to the present invention, the contour line indicating the contour of the notation part is formed on the opposite side of the three-dimensional display part across the notation part in the plane direction. This makes it clearer and makes the notation easier to read.

  In the invention according to claim 4, the notation part includes a colored central coloring part, and a peripheral coloring part that surrounds the central coloring part and has a color tone with higher reflectance of illumination light than the central coloring part. Thus, the three-dimensional display part is formed in at least a part of the periphery of the peripheral coloring part.

  According to this invention, the notation portion is composed of a center coloring portion and a surrounding coloring portion surrounding the periphery of the center coloring portion, and the stereoscopic display portion is formed on at least a part of the periphery of the surrounding coloring portion. Since the surrounding coloring portion looks like a stand and the central coloring portion seems to be on the stand, the notation portion looks three-dimensional.

  The invention according to claim 5 is characterized in that the maximum width in the planar direction of the recess forming the three-dimensional display portion is 25% to 75% of the maximum width in the planar direction of the central coloring portion.

  According to this invention, since the maximum width of the dent forming the three-dimensional display portion has a width of at least 25% to 75% of the maximum width of the central coloring portion, the three-dimensional display portion can sufficiently display the notation portion in three dimensions, and The inclined surface sufficiently reflects the illumination light, and can be displayed as a high-quality notation index.

  The invention according to claim 6 is characterized in that the inclined surface of the three-dimensional display portion is textured.

  According to this invention, since the embossed surface is formed on the inclined surface, the entire inclined surface can be shined and the notation portion can be visually recognized in three dimensions.

  The invention according to claim 7 is characterized in that the inclined surface of the three-dimensional display unit is formed in a mirror surface having a finer surface roughness than the back surface of the display plate.

  According to this invention, since the mirror surface is formed on the inclined surface, the brightness of the inclined surface is emphasized, and the inclined surface is strongly shined so that the notation portion can be visually recognized in three dimensions.

  The invention according to claim 8 is characterized in that the inclination angle of the inclined surface with respect to the plane direction of the display panel is formed in the range of 40 degrees to 50 degrees.

  According to the present invention, since the inclination angle of the inclined surface with respect to the plane direction is formed in the range of 40 degrees to 50 degrees, the illumination light is favorably reflected on the inclined surface to increase the brightness and improve the appearance. Can do.

  According to the ninth aspect of the present invention, a process of forming a three-dimensional display unit composed of a depression having an inclined surface and a vertical plane inclined with respect to the plane direction of the display plate on the back side of the display plate, and a three-dimensional display unit are formed. The printed display board includes a step of printing a notation portion serving as an indicator of the display board from the back side of the display board and forming a printing portion on the back side of the display board.

  According to the present invention, when a notation part serving as an indicator of the display board is printed from the back side of the display board and the printing part is formed, even if the printing part enters the recess forming the stereoscopic display part, the printing part Is formed on the vertical surface, the vehicular instrument can be manufactured without covering the inclined surface with the printing unit and without impairing the brightness of the inclined surface.

  In the invention according to claim 10, the step of forming the printing portion is performed by pressing the printing plate against the back side of the display plate, and when pressing the printing plate, the opening width of the opening portion on the back side of the display plate is determined. Further, the ink-impermeable portion having a narrow width is arranged in the opening, and the ink-permeable portion is arranged around the ink-impermeable portion.

  According to the present invention, when the printing plate is pressed, the ink impermeable portion having a width smaller than the opening width of the opening on the back surface side of the display plate is disposed in the opening, and the ink permeable portion is disposed on the ink impermeable portion. Since it is arranged around, even if the position of the printing plate is displaced with respect to the display board, it is possible to print reliably up to the boundary between the depression and the back surface of the display board. In addition, even if the printing part enters the inside of the depression across the boundary, the printing part is formed on the surface of the vertical surface, and the printing part is not formed on the inclined part. A vehicle instrument that does not inhibit reflection can be obtained.

It is a front view of the instrument for vehicles which shows one embodiment of the present invention. FIG. 2 is an enlarged view of “180” and “200” portions among the notation portions shown in FIG. It is a partial cross section perspective view which follows the F3-F3 line of FIG. 2 which shows typically arrangement | positioning of LED which comprises the illumination means light-guided to a display board. It is a front view explaining the dimensional relationship of the description part "20" on the display board of FIG. FIG. 5 is a schematic cross-sectional view illustrating a cross section taken along line F5-F5 illustrated in FIG. 4 and particularly explaining a dimensional relationship of a stereoscopic display unit. FIG. 6 is an explanatory diagram illustrating a process of printing with a printing plate so that a printing unit is formed in a recess forming a stereoscopic display unit. It is explanatory drawing which shows the process printed with a printing plate so that a printing part may be formed in the V-shaped cut which shows the comparative example of this invention. It is a perspective view which shows typically the part corresponding to "20" of the description part in the surface of the metal mold | die used in order to carry out injection molding of the display board. It is a schematic cross section which shows the cross-sectional shape of the other three-dimensional display part of this invention. It is a front view which shows the conventional instrument for vehicles of patent document 1. FIG. It is a partial cross section figure which follows the arrow F11-F11 line | wire of FIG.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(One embodiment)
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a front view of a vehicle instrument showing an embodiment of the present invention. The display board 1 made of a transparent acrylic resin is also called a molding dial, and the back surface located on the back side of FIG. 1 has a planar shape. The surface of the display panel 1 is molded into a gently curved shape. In addition, the curved surface shape of the surface is not essential.

  The display board 1 is illuminated by edge light illumination that introduces illumination light into the display board 1 from the edge portion 3 of the display board 1 on which the scale 2 is formed, as in Patent Document 1. The pointer 4 is rotated on the display plate 1 so that the tip of the pointer points to the number portion forming the notation portion 5. On the back side of the display board 1, an index including at least the notation part 5 is printed, and the notation part 5 is visually recognized from the front side through the transparent display board 1.

  Specifically, eleven number notation parts 5 from “0”, “20”, “40” to “180”, “200” are formed on the back of the display board 1. The notation unit 5 is provided with a stereoscopic display unit to be described later so that it can be viewed stereoscopically. In accordance with the shape of the three-dimensional display portion, a later-described depression 5b1 (FIG. 3) made of a V-shaped groove or depression is formed on the back surface of the acrylic resin of the display panel 1.

  FIG. 2 is an enlarged view of “180” and “200” in particular, of the notation 5 shown in FIG. The notation parts 5 such as “180” and “200” are printed on the back side of the display board 1 and have a number notation part 5a representing the number itself. Moreover, it has the three-dimensional display part 5b which shows the description part 5 in three dimensions substantially adjacent to the right side of this number description part 5a. This three-dimensional display part 5b consists of the dent 5b1 (FIG. 3) formed indented from the back surface side of the display board 1 to the surface side.

  The three-dimensional display 5b is seen from the front side of the display board 1, and the dent 5b1 is seen from the back side of the display board 1. The three-dimensional display 5b and the dent 5b1 are the same. In the description, the display portion is denoted by reference numeral 5b, and the depression is denoted by reference numeral 5b1.

  3 is a partial cross-sectional perspective view taken along line F3-F3 of FIG. 2 schematically showing the arrangement of the LEDs 8 constituting the illumination means for guiding light to the display panel 1. As shown in FIG. Illumination light indicated by an arrow Y3 or the like is guided from the edge portion 3 of the display board 1 to the inside of the display board 1, and the guided illumination light prints the notation part 5 or the like on the back surface of the display board 1. Reflected by the printing unit 1a and the depression 5b1.

  FIG. 3 shows only the reflection at the recess 5b1. The reflected illumination light exits from the front side of the display board 1 and enters the eyes of the driver of the vehicle, so that the notation portion 5 can be viewed in three dimensions. In FIG. 3, since the notation unit 5 is provided in the printing unit 1a, the notation unit 5 does not actually appear as shown in FIG. 3, but for convenience, the correspondence relationship is schematically shown in FIG. Is illustrated.

  The depression 5b1 is seen from the front side of the display board 1 as a three-dimensional display unit 5b, and gives a three-dimensional effect to the notation unit 5. The recess 5b1 is a recess formed on the back side of the display panel 1 and having an inclined surface 10 (FIGS. 3 and 5) described later. In this embodiment, the inclined surface 10 is not subjected to a printing process, but by finishing it into a mirror surface, it partially emits light at night, and the indicators look three-dimensional, producing a very high-class feeling. it can.

Note that when the daytime edge light illumination is not performed, even if extraneous light hits the depression 5b1, it does not return depending on the direction in which it hits, so the stereoscopic display unit 5b appears as a shadow. At night, the depression 5b1 reflects the illumination light of the edge light illumination, so the appearance can be changed between day and night.
FIG. 4 is a front view for explaining the dimensional relationship of the notation “20” on the display board 1 of FIG. 1. FIG. 5 is a schematic cross-sectional view showing a cross section taken along line F5-F5 shown in FIG. 4, and particularly explaining the dimensional relationship of the recess 5b1. FIG. 6 is an explanatory diagram showing a process of printing with the printing plate 12 so that the printing part 1a is formed in the recess 5b1. In FIG. 5, hatching indicating a cross section is partially omitted.

  In FIG. 4, the numeral notation portion 5 a includes a center coloring portion 5 a 1 colored with a color tone that makes it difficult to reflect illumination light. Further, it has a surrounding colored portion 5a2 that surrounds the central colored portion 5a1 and that reflects the illumination light more easily than the central colored portion 5a1, that is, a color tone having a high reflectance.

  And the three-dimensional display part 5b is formed in at least one part of the circumference | surroundings of the surrounding coloring part 5a2. The three-dimensional display unit 5b is formed on the side opposite to the side on which the light indicated by the arrow Y40 considered to enter virtually from the left side of the display board 1 is applied to the notation unit 5. This is because, in order to express a three-dimensional effect, it is more three-dimensional when drawn so that light strikes from the left side and a shadow is formed on the opposite side.

  Further, a contour line 5c indicating the contour of the notation portion 5 is formed at the contour portion of the notation portion 5 on the left side of FIG. 4 where the three-dimensional display portion 5b around the surrounding coloring portion 5a2 does not exist. In FIG. 3, the LED 8 is mounted on the printed circuit board 9. Illumination light from the LED 8 is reflected from the inner wall of the meter case 6 and introduced into the display panel 1 from the edge portion 3.

  B of FIG.4 and FIG.5 is the maximum width | variety of the hollow 5b1 used also as the three-dimensional display part 5b, and is corresponded to the maximum width of a groove | channel. The recess 5b1 has a tunnel shape with a triangular cross section. Further, C in FIG. 4 is the maximum width of the center coloring portion 5a1 that is a constituent element of the numeral notation portion 5a. The maximum width B of the recess 5b1 is selected within the range of 25% to 75%, preferably 40% to 60%, of the maximum width C of the center coloring portion 5a1.

  Next, the character “0” in FIG. 4 or the characters “4”, “6”, “8”, and “9” among the characters in the notation portion 5 in FIG. The numbers having the closed inner peripheral portion 5d (FIG. 4) are formed around the inner peripheral portion 5d side of the center coloring portion 5a1 and have a color tone with a higher reflectance of the illumination light than the central coloring portion 5a1. It has a colored portion 5a21.

  And the inner peripheral side three-dimensional display part 5b2 is formed in the inner peripheral part 5d side of the inner peripheral side surrounding coloring part 5a21. However, the inner peripheral side three-dimensional display portion 5b2 is merely a shade on design, and no depression corresponding to the depression 5b1 is formed. An inner peripheral side contour line 5c1 is formed on the opposite side of the inner peripheral side three-dimensional display portion 5b2 across the inner peripheral portion 5d. Moreover, it has the outer periphery side surrounding coloring part 5a22 of the color tone which is formed along the outer periphery of the center coloring part 5a1 and has a higher reflectance of illumination light than the center coloring part 5a1.

  As shown in FIG. 5, illumination light from edge light illumination represented by an arrow Y50 enters the display panel 1. The cross-sectional shape having an inclined surface 10 of θ1 = 44 degrees opposite to the plane direction of the plane portion provided with the printing portion 1a on the back surface of the display board 1 is recessed in a V-shaped recess portion having an isosceles triangle. 5b1 has. In addition, a recess 5b1 has an opening-side recess having a vertical surface 11 below the V-shaped recess in FIG.

  The inclined surface 10 is inclined in a direction from the back side to the front side of the display board 1 provided with the printing unit 1a. Therefore, the inclined surface 10 acts as a reflecting surface with respect to the illumination light, and the reflected light comes out from the front side of the display board 1 as indicated by an arrow Y51 and enters the driver's eyes. In this embodiment, the thickness Tp of the display panel 1 is 3 to 4 mm, and the depth D of the V-shaped depression is 0.3 mm.

  The sum of the depth D of the V-shaped depression and the depth H11 of the vertical surface 11 is a sink mark or weld line when forming the display panel 1 that causes irregular and unintentional patterns on the surface of the display panel 1. In consideration of prevention of occurrence, it is preferable to suppress it to about 30% of the plate thickness Tp (Tp = 3 mm to 4 mm) of the display panel 1. Therefore, the sum of the depth D of the V-shaped depression and the depth H11 of the vertical surface 11 is in the range of 0.3 mm to 1.0 mm. Tj is a plate thickness directly above the dent 5b1 of the display panel 1.

  Further, since the width B of the V-shaped cut 5b1 is 0.62 mm and half thereof is 0.31 mm, if the inclination angle in this case is θ1, Tanθ1 = 0.3 / 0.31, and the inclination angle θ1 is 44 degrees. Accordingly, the cut angle θ2 of the recess 5b1 is 92 degrees (180−2 × 44 = 92). It should be noted that the tilt angle θ1 is preferably in the range of 40 degrees to 50 degrees so that the illumination light is reflected well and shines brightly. As will be described later, when the inclined surface 10 is textured, the inclination angle θ1 is preferably in the range of 30 degrees to 60 degrees.

  FIG. 6 is an explanatory diagram showing a process of printing with the printing plate 12 so that the printing part 1a is formed in the recess 5b1. As shown in FIG. 6, a printing portion 1 a extending in the plane direction is formed on the back side of the dial 1. Moreover, it has the vertical surface 11 which stood up perpendicularly | vertically with respect to the plane direction. Due to the vertical surface 11, when the printing unit 1a is printed, the printing unit 1a made of printing ink sticks to the vertical surface 11 even if printing is shifted and printing ink enters the recess 5b1 due to the printing process capability. Since the printing part 1a is not formed on the surface 10, the illumination light reflection performance on the inclined surface 10 is not adversely affected.

  Note that if the printing unit 1a is simply prevented from adhering to the inclined surface 10, printing may be performed while avoiding a margin where the recess 5b1 exists, but in order to ensure a clean printing surface, It is desirable to print reliably except for the recess 5b1. Therefore, even when printing is deviated, printing is performed so that the printing ink discharged from the screen printing plate 12 overlaps in the recess 5b1 so that there is no unpainted printing.

  The printing plate 12 is made of a porous member, and is composed of ink transmitting portions 12a and 12b through which printing ink is transmitted and an ink non-transmitting portion 12c through which printing ink is not transmitted. As shown in FIG. 6, the overlap amounts OL1 and OL2 are set to 0.2 mm in consideration of the printing misalignment process capability and the appearance of the daytime.

  At the time of printing, the dial 1 is arranged with respect to the printing plate 12 such that the depression 5b1 of the dial 1 is in the ground direction (the top of the drawing in FIG. 6 is the ground direction). As a result, the printing ink enters the depression 5b1 during printing. However, the printing ink stops by grabbing on the vertical surface 11 as shown by arrows Y61 and Y62, and the vertical surface 11 enters the depression 5b1. Accumulate. The height H11 of the vertical surface 11 is set by estimating the amount of printing ink that enters the recess 5b1.

  Therefore, since the printing ink does not droop to the inclined surface 10, the reflection area of the illumination light can be ensured. This can reduce product defects and ensure productivity. Further, θ31 and θ32 are taper angles provided so that the mold can be easily removed. As described above, the vertical surface 11 may be substantially vertical.

  FIG. 7 is an explanatory diagram showing a process of printing with a printing plate so that the printing portion 1a is formed in the recess 5b1 showing a comparative example of the present invention. In the comparative example of FIG. 7, since there is no vertical surface 11, the printing ink that hangs down as indicated by arrows Y61 and Y62 adheres to the inclined surface 10, and the effect of reflecting the illumination light is reduced accordingly, and the appearance is improved. descend.

  FIG. 8 is a perspective view schematically showing a portion corresponding to “20” of the notation portion 5 on the surface of the mold 12 used for injection molding the display plate 1. Part (a) of FIG. 8 shows the convex shape of the surface of the mold 12, and part (b) of FIG. 8 is an enlarged view of the part indicated by the region R8. For convenience of explanation, “20” in the notation portion 5 is virtually drawn on the surface of the mold 12 by a two-dot chain line. The portions corresponding to the depression 5b1 of the three-dimensional display portion 5b in “20” of the notation portion 5 are formed as raised portions 13a, 13b, and 13c that are raised in a mountain range.

  The height H8 of the raised portions 13a, 13b, and 13c corresponds to the sum of the depth D = 0.3 mm of the V-shaped depression in FIG. 5 and the height H11 of the vertical surface 11. Further, the tip angle θ13 of the triangular peak in the cross section of the raised portions 13a, 13b, and 13c in FIG. 8 corresponds to the cut angle θ2 (FIG. 5) of the recess 5b1.

  Next, the effect and manufacturing method of the vehicle meter of one embodiment will be described. As shown in FIG. 6, the three-dimensional display unit 5 b is configured by a dent 5 b 1 having an inclined surface 10 that is recessed from the rear surface side to the front surface side of the display plate 1 and inclined with respect to the planar direction of the display plate 1. And this hollow 5b1 is comprised from the vertical surface 11 which stood up perpendicularly | vertically with respect to the plane direction, and the inclined surface 10 continuously formed in the front side of the display board 1 of this vertical surface 11. As shown in FIG.

  Illumination light introduced through the edge portion of the display board 1 is reflected by the inclined surface 10 and the notation section 5 in the printing section 1a and is directed to the surface side of the display board 1, and therefore the notation section 5 is provided by the three-dimensional display section 5b. Is viewed three-dimensionally. Further, the illumination light guided to the inside of the display panel 1 via the edge part 3 (FIG. 3) of the display panel 1 is reflected on the inclined surface 10 and the stereoscopic display part 5b is lit and viewed at night. The

  Moreover, since the vertical surface 11 (FIG. 6) is formed, even if the printing unit 1a of the notation unit 5 covers the vertical surface 11, it does not cover the inclined surface 10 of the recess 5b1, and the inclined surface 10 is more reliably covered. Can reflect the illumination light. Further, when the edge light illumination is not performed, the stereoscopic display unit 5b scatters extraneous light. Thereby, the appearance can be changed between day and night, and the notation part 5 (FIG. 4) printed on the display board 1 can be provided with a three-dimensional display part 5b so that the vehicle instrument can be seen three-dimensionally. .

  Next, since the three-dimensional display part 5b is formed on the opposite side of the display part 1 in the plane direction with respect to the left side (lower side in FIG. 1) of the display board 1 which is a virtual light entry direction, that is, Since the three-dimensional display unit 5b is formed on the shadow equivalent side, the three-dimensional display unit 5b makes it easy to see the notation unit 5 three-dimensionally. Next, a contour line 5c (FIG. 4) is formed on the opposite side of the three-dimensional display unit 5b across the planar display unit 5 so as to indicate the contour of the outer peripheral side of the display unit 5. The contour is further clarified by the contour line 5c and the three-dimensional display portion 5b, and the notation portion 5 looks three-dimensional and is easy to read.

  Next, the notation portion 5 includes a center coloring portion 5a1 and a surrounding coloring portion 5a2 surrounding the center coloring portion 5a1, and the stereoscopic display portion 5b is formed on at least a part of the periphery of the surrounding coloring portion 5a2. Therefore, the surrounding coloring portion 5a2 looks like a stand and the center coloring portion 5a1 seems to be on the stand, so that the notation portion 5 looks three-dimensional.

  Next, since the three-dimensional display portion 5b is formed of a groove-like depression, and the maximum width B of the groove has a width of at least 25% to 75% of the maximum width C of the center coloring portion 5a2, the three-dimensional display portion 5b is sufficiently The three-dimensional appearance and the inclined surface 10 are sufficiently reflected, and a high-quality character display is possible. Next, when textured on the inclined surface 10, the entire inclined surface 10 shines and the notation portion can be visually recognized in three dimensions.

  Next, when the mirror surface is formed on the inclined surface 10, the brightness of the inclined surface 10 is emphasized, and the inclined surface 10 is strongly shined so that the notation portion can be visually recognized in three dimensions. In addition, since the inclination angle θ1 of the inclined surface with respect to the plane direction is formed in the range of 40 degrees to 50 degrees, the illumination light is favorably reflected by the inclined surface 10 to increase the brightness and improve the appearance. .

  Next, when the notation portion 5 serving as an index of the display plate 1 is printed from the back side of the display plate 1 to the stereoscopic display portion 5b and the printing portion 1a is formed on the back side of the stereoscopic display portion 5b, the stereoscopic display portion Even if the printing unit 1a enters the recess 5b1 forming the 5b, the printing unit 1a is formed on the vertical surface 11, so that the inclined surface 10 is not covered with the printing unit 1a, and the brightness of the inclined surface 10 is increased. It is possible to obtain a method for manufacturing a vehicle instrument that is not impaired.

  Next, a manufacturing method will be described. In the step of forming the printing unit 1a, screen printing is performed by pressing the printing plate 12 against the back side of the display board 1 from the top as shown in FIG. The printing plate 12 includes an ink impermeable portion 12c having a width narrower than the width of the recess 5b1, and ink permeable portions 12a and 12b extending in the planar direction around the ink impermeable portion 12c. Therefore, the position of the printing plate 12 is shifted with respect to the display board 1, and printing can be reliably performed up to the boundary between the recess 5 b 1 and the back surface of the display board 1.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows. FIG. 9 is a schematic cross-sectional view showing a cross-sectional shape of another recess 5b1 of the present invention. As shown in FIG. 9, it may have another cross-sectional shape of the recess 5b1. FIG. 9A shows a cross section having an unequal triangular shape on the front surface of the display panel 1 of the vertical surface 11. FIG. 11B has a trapezoidal cross-sectional shape portion on the front side of the display plate 1 of the vertical surface 11. In FIG. 9, some of the hatching indicating the cross section is omitted.

  Next, it is desirable to mirror the inclined surface 10 in the recess 5b1 to form a mirror surface and reflect the illumination light with this mirror surface, but it is simply a cut surface for molding, and the surface roughness is set as a special mirror surface. It doesn't have to be fine. In addition, by forming a grain on the inclined surface 10 of the V-shaped cut 5b1, the whole grain shines at night illumination, and the whole appears to be raised, and a different three-dimensional effect can be produced.

  Moreover, after printing the printing part 1a, you may perform mirror surface printing so that the printing film with a shine may be formed in the inclined surface 10 of the hollow 5b1. Or you may give the coating by mirror surface ink so that a coating film may adhere to the inner surface of the hollow 5b1 which is not masked. Thus, by forming a glossy mirror surface printing or a coating film of mirror surface ink on the inclined surface 10 in the recess 5b1, the brightness of the inclined surface 10 is emphasized, and the notation portion 5 is further visually recognized in three dimensions. Can be made. Further, since the illumination light is effective regardless of whether it is irradiated on the index from above, below, left, or right, the edge light illumination and the backlight illumination that illuminates from the back side of the display panel 1 may be combined.

  Further, the present invention is applied to a vehicle instrument of a type in which illumination light guided into the pointer from the tip of the pointer 4 is radiated, and the notation 5 indicated by the pointer 4 by the light from the tip of the pointer The reflection may be emphasized. Further, the color of the illumination light may be changed during display.

  In addition, when the depression 5b1 is not subjected to printing or texture processing for reflection, the internal structure of the instrument can be seen through the three-dimensional display portion 5b when the depression 5b1 is viewed from the front depending on the shape. For this reason, if the inclination angle θ1 (FIG. 5) of the inclined surface 10 is preferably set to 35 to 45 degrees, there is an effect that the illumination light can be totally reflected and the internal structure can be concealed. Moreover, it can be employed not only for a speedometer but also for other instruments such as an engine tachometer and a fuel system.

  The inclined surface may be a gently curved surface instead of a tapered surface. Moreover, although embodiment which used the number part as a description part was shown, this invention can also be used for the instrument which a pointer points out the description part which is not numbers, such as E and F. Further, the pointer may not be provided, and the pointer may be used instead of the lighting position of a plurality of light emitting diodes that indicate the position of the index.

DESCRIPTION OF SYMBOLS 1 Display board 1a Printing part 2 Scale 3 Edge part 4 Pointer 5 Notation part 5a Number notation part 5a1 Center coloring part 5a2 Peripheral coloring part 5a21 Inner side surrounding coloring part 5a22 Outer peripheral side coloring part 5b Three-dimensional display part 5b1 hollow 5b2 Inner circumference Side stereoscopic display portion 5c Contour line 5d Inner peripheral portion 10 Inclined surface 11 Vertical surface B Maximum width of dent 5b1 C Maximum width of center coloring portion 5a θ1 Inclination angle θ2 Cut angle

Claims (10)

An edge light illumination type vehicle instrument for introducing illumination light into the display board from the side of the display board,
Printed on the back side of the display board, and a notation part serving as an index;
Provided on the back side of the panel, it has a three-dimensional display unit for stereoscopically displaying the representation unit,
The stereoscopic display unit, the recess from the back side of the display panel on the front side, consist of depressions having an inclined surface inclined toward the front side from the back side with respect to the plane direction of the display panel, and depressions optic lobe, the adjacent the indicating section, and the open mouth side recessed parts that have a and the back side of the opening of the panel and upstanding vertical plane perpendicular to the plane direction, formed on the front side of said vertical plane is composed of a V-shaped cross-section of the V-shaped recess having said inclined surface,
A part of the notation is printed on the vertical surface,
The vehicle instrument, wherein the illumination light introduced through the edge portion of the display plate is reflected by the inclined surface and the notation portion and travels toward the surface side of the display plate.   The vehicular instrument according to claim 1, wherein the three-dimensional display unit is formed on the opposite side of the display plate in the plane direction with respect to the left or right side of the display board.   The vehicular instrument according to claim 1, wherein a contour line indicating an outline of the notation portion is formed on the opposite side of the three-dimensional display portion across the notation portion in the planar direction. . The notation portion is composed of a colored central coloring portion, and a surrounding colored portion having a color tone that surrounds the central colored portion and has a higher reflectance of the illumination light than the central colored portion,
The vehicular instrument according to any one of claims 1 to 3, wherein the three-dimensional display unit is formed on at least a part of the periphery of the peripheral coloring unit. Any maximum width of the planar direction of the recess forming the stereoscopic display unit, according to claim 1 to 4, characterized in that it has a width of 25% to 75% of the maximum width of the planar direction of the central colored portion The vehicle instrument according to claim 1. The vehicular instrument according to any one of claims 1 to 5, wherein the inclined surface of the three-dimensional display unit is textured.   The vehicular instrument according to any one of claims 1 to 5, wherein the inclined surface of the three-dimensional display unit is formed as a mirror surface having a surface roughness finer than that of the back surface of the display plate.   The vehicular instrument according to any one of claims 1 to 7, wherein an inclination angle of the inclined surface with respect to the planar direction of the display plate is formed in a range of 40 degrees to 50 degrees. A method of making any of the instrument the vehicle according to claim 1 to 8, on the back side of the display panel, with said inclined surface inclined with respect to the plane direction of the display plate and the vertical plane a step of forming the stereoscopic display unit composed of the recess,
To the display panel in which the stereoscopic display is formed, and forming a printing portion on the back side of the panel the panel from the rear side by printing the indicating section, which is an indicator of the display board, the A method for manufacturing the vehicle instrument, comprising: The step of forming the printing portion is performed by pressing a printing plate against the back side of the display board,
When pressing the printing plate, an ink impermeable portion having a width smaller than the opening width of the opening on the back side of the display plate is disposed in the opening, and the ink permeable portion is disposed around the ink impermeable portion. The method for manufacturing a vehicular instrument according to claim 9, wherein

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