JP5570344B2 - Dial and method for manufacturing dial - Google Patents

Description

  The present invention relates to a dial and a manufacturing method of the dial, and for example, relates to a dial used in an automobile meter and a manufacturing method of the dial.

  Conventionally, as a dial used in the above-mentioned automobile meter, it has been performed as a decoration that gives a sense of quality, that is, a decoration that can realize a novel appearance, by applying a hairline process to the dial and making it appear metallic. ing.

  As the metallic dial, for example, the one shown in FIG. 5 has been proposed (Patent Document 1). As shown in the figure, the dial 6 includes a light-transmitting transparent substrate 61 made of acrylic resin or polycarbonate resin, a semi-light-transmitting half mirror layer 65 provided on the back surface of the transparent substrate 61, and And a light shielding layer 67 provided on the back surface of the half mirror layer 65.

  The half mirror layer 65 is made of a very thin metal film and reflects the external light LL1 incident from the front, but transmits the illumination light LL2 from the light source 12 incident from the back. The light shielding layer 67 has an opening corresponding to the display design. The dial 6 includes a smoke layer 68 provided by printing dark transparent ink on the front surface of the transparent substrate 61, and a hairline layer 69 provided by printing ink in a hairline shape on the front surface of the smoke layer 68. And further.

  According to the dial 6 described above, when the light source 12 disposed on the back surface of the dial 6 is turned on, the illumination light LL2 is emitted to the front of the dial 6 through the opening of the light shielding layer 67 and the half mirror layer 65. The display design corresponding to the opening of the light blocking layer 67 is visually recognized. Moreover, the external light LL1 from the front surface of the dial 6 is reflected by the half mirror layer 65 and the hairline layer 69, so that the surface of the dial 6 can be seen as a metal plate subjected to hairline processing.

JP 2008-89479 A

  However, in the above-described conventional dial 6, since the hairline layer 69 is provided on the front side of the transparent substrate 61, the irregular reflection due to the surface irregularities of the hairline printing has a low reflectance of the hairline printing, and thus the presence of the hairline is weak. There was a problem that lack of expressive power with a metallic feeling. In addition, since the hairline layer 69 is provided by printing, alignment between the dial 6 and the printing machine and a drying process of the ink after printing are necessary, which causes a problem in cost.

  Then, this invention makes it a subject to provide the manufacturing method of the dial plate which can emphasize a metal feeling more strongly, and the presence of a hairline, and the said dial plate.

The invention described in claim 1 for solving the above-described problem is provided on a transparent substrate having light transmittance, a weighting portion formed of hairline-shaped irregularities provided on a back surface of the transparent substrate, and a back surface of the weighting portion. The dial has a mirror layer that reflects external light that is light from the front side of the transparent substrate provided.
2. The dial plate according to claim 1, further comprising a suppression ink layer provided on a back surface of the mirror layer and preventing a pinhole from being seen in the mirror layer by illumination light. Exist.

The invention according to claim 3, wherein a method of manufacturing the dial plate according to claim 1 or 2, the manufacturing method of the dial that by polishing the back side of the transparent substrate, characterized in that providing the basis weight portion Exist.

  As described above, according to the first aspect of the present invention, by providing a weighting portion made of hairline-shaped irregularities on the back surface of the transparent substrate and further providing a mirror layer on the back surface side of the transparent substrate on which the weighting portion is provided. It has a high reflectance and can give a metallic feeling due to the hairline.

According to the third aspect of the invention, the back side of the transparent substrate is polished to provide a weighting portion, thereby saving the labor (positioning with the printing press, ink drying process) and reducing the cost. Can do. Further, since finer irregularities can be provided by polishing, a metallic feeling can be further provided.

It is a front view which shows one Embodiment of the meter for vehicles incorporating the dial plate of this invention. It is the II sectional view taken on the line of FIG. FIG. 3 is a detailed cross-sectional view of a dial constituting the vehicle meter shown in FIG. 2. It is a disassembled perspective view of the dial plate shown in FIG. It is sectional drawing which shows an example of the conventional dial.

  Hereinafter, the dial of the present invention will be described with reference to FIGS. A vehicle meter 1 incorporating a dial according to an embodiment of the present invention is a device that is mounted on a moving body such as an automobile and displays the state of the moving body to a passenger of the moving body.

  The vehicle meter 1 includes a case 2, a turn 3 attached to the front of the case 2, a front glass 4 that covers the case 2 and the front of the turn 3, and a pointer device 5 accommodated in the case 2. ing. The case 2 is made of a synthetic resin or the like, and includes a case main body 21 and a back cover 22.

  The dial 3 is made of synthetic resin or the like and is attached to the front side of the dial 6 described later. The facing 3 is provided with an opening corresponding to the dial 6 so as to cover the portion other than the dial 6 of the pointer device 5 accommodated in the case 2 so as not to be visually recognized.

  The pointer device 5 shines the dial 6, a light guide pointer 7 disposed in front of the dial 6, an internal unit 8 for rotationally driving the pointer 7, and the dial 6 and the pointer 7. LED9 as a light source for this, and the wiring board 10 in which these internal units 8, LED9, etc. were mounted are provided.

  The dial 6 is provided with display designs such as letters and scales. The detailed configuration of the dial 6 will be described later.

  The pointer 7 is made of a light guide material such as acrylic. The pointer 7 penetrates through the dial 6 and protrudes toward the back side, and an indicator 72 extends along the front of the dial 6 from the base end 71 on the front side of the dial 6. And are provided. The internal unit 8 is attached to a wiring board 10 provided on the back surface of the dial 6.

  The internal unit 8 is provided with an internal unit body 81 mounted on the back surface of the wiring board 10 and an output shaft 82 that rotates around an axis that penetrates the wiring board 10 and protrudes to the front side. A proximal end portion 71 of the pointer 7 is attached to the output shaft 82. Thereby, when the output shaft 82 of the inner unit 8 rotates, the pointer 7 rotates around the base end portion 71.

  The LED 9 is mounted on the front surface of the wiring board 10 described above. The wiring board 10 is locked to the case body 21 so as to be disposed on the back surface of the dial 6.

  Next, the detailed configuration of the dial 6 described above will be described below with reference to FIGS. As shown in the figure, the dial 6 includes a transparent substrate 61, a mirror ink layer 62 (= mirror layer) provided on the side of the transparent substrate 61 away from the occupant of the moving body, that is, on the back side, And a suppression ink layer 63 provided on the back side of the mirror ink layer 62.

  The transparent substrate 61 is a transparent light-transmitting substrate made of, for example, acrylic resin or polycarbonate. As shown in FIG. 4, the back surface of the transparent substrate 61 is polished with a polishing stone 11 so that a plurality of hairline-shaped asperities along the radial direction centering on the base end portion 71 of the pointer 7 is used. A fabric weight 61A (= massage portion) is provided.

  The mirror ink layer 62 is provided by printing the mirror ink on the back surface of the above-mentioned Asahi light weighting portion 61A. The mirror ink layer 62 reflects external light LL1 incident from the front. The mirror ink layer 62 is provided by cutting out portions corresponding to the display design of the dial 6 such as scales and characters.

  The above-described mirror ink layer 62 may form a pinhole, and when the illumination light LL2 is incident from the back, the pinhole is visually recognized from the front. Therefore, an ink layer 63 is provided on the back surface of the mirror ink layer 62 in order to prevent the pinhole from being seen.

  The suppression ink layer 63 is a light-shielding layer formed by printing black ink, for example. Like the mirror ink layer 62, a portion corresponding to the display design of the dial 6 is cut out and provided. ing.

  Further, the dial 6 includes a transparent color ink layer 64 provided on the occupant side of the moving body of the transparent substrate 61, that is, the front surface, and a top coat layer 65 provided on the front surface of the transparent color ink layer 64. ing. The transparent color ink layer 64 is a layer formed by printing a transparent ink colored in a predetermined color such as blue, for example. The transparent color ink layer 64 is transmitted through the illumination light LL2, and shines in the predetermined color to the passenger of the moving body. Is done. The top coat layer 65 is a protective layer formed by printing colorless and transparent ink.

  According to the dial 6 having the above-described configuration, when the illumination light LL2 is incident from the back surface of the dial 6, the transparent substrate passes through the cutout corresponding to the display design provided in the suppression ink layer 63 and the mirror ink layer 62. Then, the light is incident on the rear surface of 61 and then passes through the transparent substrate 61, the transparent color ink layer 64, and the top coat layer 65 and reaches the eyes of the front passenger. For this reason, the said display design is visually recognized brilliantly. Further, external light LL1 from the front is reflected by the mirror ink layer 62 and reaches the eyes of the front passenger. Due to the mirror ink layer 62 and the Asahi light weighting portion 61 </ b> A on the front surface of the mirror ink layer 62, the dial 6 is visually recognizable in a metallic tone.

  Further, according to the dial 6 described above, the Asahi light weighting portion 61 </ b> A composed of hairline-shaped irregularities is provided on the back surface of the transparent substrate 61, and mirror printing is further provided on the back surface to provide the mirror ink layer 62. Is directly reflected by the surface of the mirror ink layer 62 behind it, so that the reflectance is high, the irregular reflection by the hairline is strong, and a metallic feeling can be given.

  Next, the manufacturing method of the dial 6 mentioned above is demonstrated. First, as shown in FIG. 4, the rear surface of the transparent substrate 61 is subjected to Asahi light weighting with a polishing stone 11. Specifically, the polishing stone 11 is rubbed radially around the base end portion 71 of the pointer 7 on the back surface of the transparent substrate 61 to perform the Asahi light weighting process to provide the Asahi light weighting portion 61A. Thereafter, the mirror ink layer 62 is provided by printing on the back surface of the transparent substrate 61 provided with the Asahi light weight portion 61A. When the mirror ink layer 62 is dried, the ink layer 63 is then provided by printing, and the ink layer 63 is dried.

  A transparent color ink layer 64 is provided on the front surface of the transparent substrate 61 by printing. After the transparent color ink layer 64 is dried, a top coat layer 65 is then provided by printing, and the top coat layer 65 is dried.

  According to the manufacturing method of the dial plate 6 described above, the back side of the transparent substrate 61 is polished to provide the Asahi light weighting portion 61A, thereby saving the labor involved in printing (positioning of the printing press, ink drying process) and cost. You can go down. Further, since finer irregularities can be provided by polishing, a metallic feeling can be further provided.

  According to the above-described embodiment, the cutout corresponding to the display design is provided in the mirror ink layer 62, but the present invention is not limited to this. The mirror ink layer 62 may be one that can transmit the illumination light LL1 from the back surface as in the prior art, and in this case, the cutout may not be provided.

  Further, according to the embodiment described above, the mirror ink layer 62 is provided by printing with the mirror ink, but the present invention is not limited to this. For example, a mirror layer may be provided by attaching a thin metal foil by vapor deposition or the like as in the prior art.

  Further, according to the above-described embodiment, the Asahi light weight portion 61A is composed of hairline-shaped irregularities along the radial direction around the proximal end portion 71 of the pointer 7, but the present invention is limited to this. is not. The Asahi light weight 61A may be composed of, for example, hairline irregularities along the circumferential direction centered on the proximal end 71 of the pointer 7, or may have other shapes based on metal or the like. May be.

  Further, according to the embodiment described above, the Asahi light weight portion 61A is provided by polishing the transparent substrate 61, but the present invention is not limited to this. The Asahi light weighting portion 61A may be provided by forming hairline-shaped irregularities with ink on the back surface of the transparent substrate 61 as in the prior art.

  The Asahi light weight 61A may be provided by scraping the back surface of the transparent substrate 61 with a V-shaped cutter. However, polishing as in the present embodiment can shorten the processing time and achieve finer processing. Unevenness can be provided.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

6 Dial 61 Transparent substrate 61A Asahi light weighting (weighting)
62 Mirror ink layer (mirror layer)

Claims (3)

A transparent substrate having light transparency;
A weighted portion made of hairline-shaped irregularities provided on the back surface of the transparent substrate (except that the weighted portion is also provided on the front surface of the transparent substrate) ;
A mirror layer that reflects external light that is light from the front side of the transparent substrate provided on the back surface of the weighting portion;
A dial characterized by comprising. A suppression ink layer provided on the back surface of the mirror layer to prevent pinholes of the mirror layer from being seen by illumination light;
The dial according to claim 1, further comprising a dial. A manufacturing method of a dial according to claim 1 or 2 ,
The dial is manufactured by polishing the back side of the transparent substrate.

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