WO2015198861A1 - Meter device - Google Patents

Meter device Download PDF

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Publication number
WO2015198861A1
WO2015198861A1 PCT/JP2015/066704 JP2015066704W WO2015198861A1 WO 2015198861 A1 WO2015198861 A1 WO 2015198861A1 JP 2015066704 W JP2015066704 W JP 2015066704W WO 2015198861 A1 WO2015198861 A1 WO 2015198861A1
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WO
WIPO (PCT)
Prior art keywords
display
instrument device
translucent
light
case
Prior art date
Application number
PCT/JP2015/066704
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French (fr)
Japanese (ja)
Inventor
青野　賢司
柳瀬　拡
Original Assignee
日本精機株式会社
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Filing date
Publication date
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Publication of WO2015198861A1 publication Critical patent/WO2015198861A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Arrangement of adaptations of instruments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/26—Windows; Cover glasses; Sealings therefor

Definitions

  • the present invention relates to an instrument device, and more particularly, to an apparatus provided with an antireflection portion having fine conical protrusions.
  • Patent Document 1 There is a device disclosed in Patent Document 1 as a device provided with fine conical projections in order to prevent external light reflection.
  • the device described in Patent Document 1 is provided with a plurality of cone-shaped convex portions (so-called moth-eye structure) provided on the surface of a touch panel located on a display panel and arranged at a pitch equal to or less than the wavelength of visible light. Thus, an attempt is made to reduce external light reflection.
  • an instrument device mounted on a motorcycle or the like and exposed outdoors tends to cloud the inside of the translucent plate that is visible through the display of the instrument device.
  • an antifogging agent is applied to the inner surface of the translucent plate.
  • an antifogging agent is used in this case, there is a dilemma that the antifogging agent is buried in fine irregularities and the antireflection effect is not exhibited.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an instrument device that has both antireflection performance and antifogging performance and good visibility.
  • the instrument device includes: An instrument device mounted on a vehicle, A display unit for displaying a predetermined measurement amount related to the vehicle; A translucent part that is located on the front side of the display part and visually recognizes the display part; On the display part side of the translucent part, an antireflection part having a plurality of conical protrusions arranged with a pitch less than the wavelength of visible light and formed of a hydrophilic resin is provided. It is characterized by that.
  • an instrument device that has both antireflection performance and antifogging performance and good visibility.
  • FIG. 1 It is a figure which shows the instrument apparatus which concerns on 1st Embodiment of this invention
  • (a) is a top view
  • (b) is an AA line schematic sectional drawing shown to Fig.1 (a).
  • the instrument device 100 is mounted on a vehicle such as a motorcycle and notifies a user (mainly a driver) of a measurement amount related to the vehicle such as a vehicle speed, an engine speed, and a remaining fuel.
  • the instrument device 100 is disposed, for example, in the vicinity of a handle of a motorcycle and has an outer shape shown in FIG.
  • each part of the instrument device 100 is defined with the upper side in FIG. 1B representing the instrument device 100 in cross section as the “front side” and the lower side as the “back side”. Will be described as appropriate.
  • the instrument device 100 includes a display unit 10, a circuit board 20, a translucent plate 30, a first case 40, a second case 50, and antireflection. Unit 60.
  • the translucent plate 30 and the antireflection unit 60 constitute a translucent unit 90 that is located on the front side of the display unit 10 and allows the display unit 10 to be seen through.
  • the display unit 10 displays a measurement amount such as the vehicle speed described above, and includes a display 11 and a design plate 12.
  • the display 11 is composed of, for example, a liquid crystal display (LCD) and displays a measurement amount such as a vehicle speed under the control of a control unit (not shown) described later.
  • the display 11 includes a liquid crystal panel, a backlight that illuminates the panel from the back, a drive circuit that supplies an electric signal to the liquid crystal panel, and the like.
  • the display 11 may be an organic EL (Electro-Luminescence) display.
  • the display of the measurement amount on the display 11 includes not only a mode in which the measurement value is specifically displayed with numbers and characters but also a mode in which the user reads the measurement amount by displaying a bar graph or a pointer image. .
  • the design board 12 is formed by forming a printing layer on the front surface and / or the back surface of a translucent plate material such as polycarbonate.
  • the design plate 12 is located on the front side of the display 11 and allows the display surface of the display 11 to be viewed from the formed opening 12a, while being a light-shielding print portion formed over substantially the entire area of the plate material. Cover other parts of the screen.
  • a light-transmitting portion is provided in a predetermined portion of the light-shielding printed portion of the design plate 12, for example, in a cutout shape (a letter character shape), and this light-transmitting portion allows the state of the direction indicator, the lighting state of the light, etc.
  • a warning display may be realized by forming symbols (including characters, figures, and icons) representing various warnings.
  • the light-transmitting portion is illuminated from behind by a light source (for example, an LED (Light Emitting Diode)) mounted on the circuit board 20, so that the warning display is turned on.
  • the circuit board 20 includes a printed circuit board on which a control unit (not shown) and a light source for lighting a warning display are mounted.
  • the circuit board 20 is located on the back side of the display 11.
  • the control unit includes a microcomputer or the like, and acquires data indicating various measurement amounts from various sensors such as an ECU (Electronic Control Unit) and a vehicle speed sensor. Based on the data thus obtained, the control unit causes the display 11 to display a measurement amount such as a vehicle speed. Further, for example, the control unit causes the warning light source to emit light according to signals indicating various warnings acquired from the ECU or the like.
  • the translucent plate 30 constitutes the translucent unit 90 that allows the display unit 10 to be seen through.
  • the translucent unit 90 includes an antireflection unit 60 and a double-sided adhesive tape 70, which will be described later, provided on the back surface of the translucent plate 30.
  • the translucent plate 30 is made of a translucent resin such as PMMA (polymethyl methacrylate resin) and is located on the front side of the display unit 10.
  • the translucent plate 30 is formed in a lens shape that is convex toward the front side. Thereby, it is suppressed that external light reflects toward a driver
  • the first case 40 is made of a light-shielding resin or the like, and holds the outer edge of the translucent plate 30 (the translucent portion 90) with an opening 41 formed on the front side.
  • the first case 40 is formed integrally with the translucent plate 30 by insert molding or the like, thereby preventing water and the like from entering from the front side of the instrument device 100.
  • the second case 50 is made of a light shielding resin or the like, and is formed in a box shape opened on the front side.
  • the second case 50 is fitted to the first case 40 at the outer periphery of each other and integrally forms a substantially sealed space inside.
  • the display unit 10 and the circuit board 20 are accommodated in the substantially sealed space.
  • the first case 40 and the second case 50 are coupled through, for example, a sealing material (not shown), and the coupled portion is waterproofed.
  • an insertion hole through which a wire harness connecting the circuit board 20 and the outside of the instrument device 100 passes is provided on the back surface of the second case 50. This insertion hole is also waterproofed by the sealing material.
  • a plurality of vent holes are provided on the back surface of the second case 50. These vent holes are closed with a porous film and are waterproofed while allowing the inside and outside of the instrument device 100 to be vented.
  • the internal units such as the display unit 10 and the circuit board 20 may be fixed to either the first case 40 or the second case 50.
  • the internal unit may have a structure that is sandwiched between both cases.
  • As the fixing / arrangement structure for the case of the internal unit an appropriate one may be adopted in consideration of ease of assembly and vibration resistance.
  • the first case 40 and / or the second case 50 may be configured by combining a plurality of members.
  • the first case 40 and the second case 50 configured as described above prevent water from entering the instrument device 100.
  • the space formed in both cases by the above-mentioned ventilation holes is a substantially sealed space in which a certain degree of ventilation is maintained. Due to such a structure, ventilation between the inside and outside of the instrument device 100 is performed. Since it becomes limited, the inner side of the translucent plate 30 is likely to be cloudy as compared with a display device for indoor use.
  • the instrument device 100 according to the present embodiment ensures anti-fogging performance along with anti-reflection performance of external light by the anti-reflection unit 60 described below.
  • the antireflection part 60 is provided on the back side of the translucent part 90. As shown in FIG. 2, the antireflection portion 60 is a film (sheet) configured by coating a film-like base material 61 with a concavo-convex layer 62 having a moth-eye structure.
  • the base material 61 is made of a resin such as triacetyl cellulose (TAC), polyethylene terephthalate (PET), polycarbonate (PC).
  • TAC triacetyl cellulose
  • PET polyethylene terephthalate
  • PC polycarbonate
  • As the substrate 61 for example, a material having a thickness of about 5 to 300 ⁇ m and excellent in optical characteristics is selected.
  • the concavo-convex layer 62 is formed with a moth-eye structure, and a plurality of conical projections 62a are arranged two-dimensionally (along the back surface of the substrate 61) with a pitch P equal to or less than the wavelength of visible light. It consists of
  • the arrangement pitch P of the conical protrusions 62a is not particularly limited as long as it is equal to or smaller than the wavelength of visible light. However, since it affects the wavelength dependency of the reflectance, the arrangement pitch P should be an appropriate value according to the purpose. Is formed.
  • the arrangement pitch P is set to about 100 nm, for example.
  • the arrangement pitch P can be appropriately changed within a range of several tens of nm to several hundreds of nm.
  • the height H of the conical protrusion 62a also affects the wavelength dependency of the reflectance, it is formed to have an appropriate value according to the purpose. For example, the height H is about several hundred nm.
  • the “conical shape” in the conical protrusion 62 a does not mean only a complete cone or a pyramid, but may be generally a cone shape or a tapered shape (cross-sectional wedge shape). Further, the tip of the conical protrusion 62a may be curved as shown in FIG. 2 or may not be sharp. Moreover, the front-end
  • the conical protrusions 62a need to be tapered in order to realize a moth-eye structure, but may be changed as appropriate according to manufacturing restrictions and purposes.
  • the antireflection part 60 forms a layer made of a resin having photocurability (UV (Ultraviolet), EB (ElectronElectroBeam) curability, etc.)) and hydrophilicity on the substrate 61, and then transfers the moth-eye shape with a stamper.
  • the uneven layer 62 is formed by curing the resin layer by light irradiation.
  • the concavo-convex layer 62 is composed of a material in which a hydrophilic polymer (protein, polyesteramide, etc.) is contained in a UV curable resin, a material using a photocatalyst (titanium oxide) that exhibits hydrophilicity during UV irradiation, or the like. .
  • corrugated layer 62 which consists of hydrophilic resin is formed.
  • a moth-eye shape (wavelength of visible light) is formed on a base material 61 made of a resin (thermoplastic and hydrophilic resin) obtained by imparting hydrophilicity to a thermoplastic resin such as polyethylene or polypropylene by heat cycle molding.
  • the antireflection part 60 may be manufactured by transferring a shape having a plurality of conical protrusions arranged at the following pitch.
  • the antireflection part 60 is closely fixed to the back surface of the translucent plate 30 with a double-sided adhesive tape 70 having high transparency.
  • the antireflection part 60 may be melted and fixed to the light transmitting plate 30 when the light transmitting plate 30 is injection-molded.
  • the moth-eye structure is formed directly on the back surface of the translucent plate 30 made of a hydrophilic resin, not by a method of fixing and fixing the antireflection portion 60 made of a film on the back surface of the translucent plate 30.
  • the translucent part 90 provided with the antireflection part 60 may be realized.
  • the antireflection part 60 is formed directly on the translucent plate 30 without using the base material 61 or the double-sided adhesive tape 70.
  • the instrument device 100 having the above configuration is provided with an antireflection portion 60 using a moth-eye structure on the back side of the light transmitting portion 90.
  • the refractive index for light incident from the outside of the instrument device 100 and transmitted from the light transmitting part 90 to the air layer between the light transmitting part 90 and the display part 10 is applied from the light transmitting part 90 to the air layer. It can be continuously changed (a discontinuous interface in the refractive index can be avoided). For this reason, it is suppressed that incident light is interface-reflected by the back surface of the translucent part 90, the reflection of an external scene, sunlight, and illumination decreases, and the visibility of the display part 10 improves.
  • the transmittance of light emitted from the display unit 10 (light representing the display image of the display 11 and light from the lit warning display) is increased. It is not necessary to increase the luminance of the backlight of the display 11 or the light source for warning more than necessary, and the power consumption of the instrument device 100 can be suppressed. Moreover, generation
  • produced by repeating reflection of light between the display part 10 and the translucent part 90 can also be suppressed.
  • the uneven layer 62 has a back surface of the translucent part 90 that is formed by agglomeration of moisture existing in the instrument device 100 due to a synergistic effect of the wettability due to the hydrophilic resin and the moth-eye structure. Even if it is formed, it is not a fine water droplet with a particle size (several ⁇ m to several tens ⁇ m) that diffusely reflects light, and it is possible to prevent the contact angle from being held in an obtuse state. It can prevent being visually recognized as white. That is, since the uneven layer 62 realizes a superhydrophilic state with an extremely small apparent contact angle, water formed by aggregation is not formed as fine water droplets that cause Mie reflection. The fogging occurring inside 90 is prevented. As a result, it is possible to obtain a dustproof effect to the extent that application of an antifogging agent becomes unnecessary.
  • the instrument device 100 has both good anti-reflection performance and anti-fogging performance and good visibility.
  • the above moth-eye structure can be applied to various instruments.
  • a second embodiment in which a moth-eye structure is applied to an analog instrument will be described with reference to FIGS. 3 and 4.
  • each part having the same function as that described in the first embodiment is denoted by the same reference numeral as in the first embodiment, and is different. The explanation will be focused on.
  • the instrument device 200 As shown in FIGS. 3 and 4, the instrument device 200 according to the second embodiment is decorated in addition to the display unit 210 that displays the measurement amount using the pointer 211, the translucent plate 30, and the antireflection unit 60. A translucent part 290 having a part 80.
  • the instrument device 200 can be applied to various devices such as a speedometer and a tachometer. In the following description, the instrument device 200 is assumed to be a speedometer in order to facilitate understanding of the description.
  • the display unit 210 includes a pointer 211 and a dial plate 212. On the dial 212, an indicator portion (made of scales, numbers, etc.) to be indicated by the pointer 211 is formed.
  • the indicator portion is formed by a light-transmitting portion formed by cutting out the light-shielding print layer, for example, in the same manner as the design plate 12 described above.
  • the pointer 211 rotates on the dial 212 according to the vehicle speed.
  • the display unit 210 informs the user of the vehicle speed by causing the indicated part of the pointer 211 and the indicator part to be compared and read.
  • the pointer 211 is rotated by the power of a stepping motor mounted on a circuit board (not shown) (the same configuration as the circuit board 20 described above). This motor operates under the control of the control unit, and rotates the pointer 211 in accordance with the vehicle speed signal supplied from the vehicle speed sensor.
  • the light transmitting plate 30 is formed in a lens shape (curved surface shape) that is convex on the front surface side, and is configured so that the vicinity of the rotation center of the pointer 211 protrudes most.
  • a lens shape curved surface shape
  • the translucent plate 30 is formed in a lens shape, it is easy to ensure a gap with the pointer 211, so that there is an advantage that the instrument device 200 can be made thin.
  • the decoration part 80 is formed in a part between the translucent plate 30 and the antireflection part 60.
  • the decoration unit 80 is a printed layer formed by pad printing on the back surface of the translucent plate 30, a printed layer formed by screen printing on the front surface of the substrate 61, or a depression (engraved) on the back surface of the translucent plate 30. (In FIG. 4, the example in which the decorating unit 80 is configured by an air layer is shown).
  • the decoration unit 80 represents, for example, a frame or a concentric pattern when the instrument device 200 is viewed from the front side.
  • the design of the decoration part 80 can have various aspects, and is not limited.
  • the decoration part 80 When such a decoration part 80 is provided, the antireflection effect of the antireflection part 60 is eliminated in the formation part, and thus the reflected light in the formation part of the decoration part 80 is emphasized. Thereby, a strong contrast is provided between the light that is incident from the front side of the translucent part 290 and reflected at the part where the decorative part 80 is formed, and the light reflected at the other part, and the decorative part 80 is raised.
  • the decorating unit 80 can also express at least a part of the index unit that is the target of the pointer 211. In this case, the indicator part formed by the decoration part 80 is instructed by the pointer 211 that is visually recognized through the light transmitting part 290.
  • an anti-reflection effect by applying an anti-reflective (AR) coat on the front surface of the light-transmitting plate 30.
  • the AR coat is formed, for example, by a technique of vacuum-depositing magnesium fluoride or the like. It is also possible to provide a moth-eye structure not only on the back side of the translucent plate 30 but also on the front side. Further, the translucent plate 30 does not have to be a convex lens shape, and may be colored and transparent.
  • the decoration unit 80 may be provided in a digital instrument such as the instrument device 100.
  • the vehicle on which the instrument devices 100 and 200 are mounted is not limited to a motorcycle.
  • the present invention is particularly suitable for vehicles on which instrument devices are exposed to the outdoors, such as motorcycles, agricultural machines, ships, snowmobiles, and jet skis. This is because the influence of outside light is great, and airflow is restricted from the viewpoint of waterproofness, and the environmental temperature is greatly changed, so that it is easily cloudy.
  • the present invention relates to an instrument device, and can be applied to, for example, an instrument device mounted on a moving body including an automobile, a motorcycle, an agricultural machine, or a construction machine.

Abstract

　Provided is a meter device that combines anti-reflection capability and anti-fog capability, and that has good visibility. This meter device (100) is installed in a vehicle, and is provided with a display unit (10) for displaying a prescribed metered quantity pertaining to the vehicle, and a light-transmissive unit (90) positioned to the front surface side of the display unit (10), and through which the display unit (10) is visible. To the display unit (10) side of the light-transmissive unit (90) is provided an anti-reflection unit (60) having a plurality of conical protrusions which are formed from a hydrophilic resin and arranged at a pitch equal to or smaller than the wavelengths of visible light.

Description

計器装置Instrument device
　本発明は、計器装置に関し、詳しくは、微細な錐状突起を有する反射防止部を備える装置に関する。 The present invention relates to an instrument device, and more particularly, to an apparatus provided with an antireflection portion having fine conical protrusions.
　外光反射を防止するために、微細な錐状突起が設けられた装置として、特許文献１に開示されたものがある。特許文献１に記載の装置は、ディスプレイパネル上に位置するタッチパネルの表面に設けられた、可視光の波長以下のピッチで配置された複数の錐状凸部（いわゆるモスアイ（蛾の眼）構造）により、外光反射の低減を試みたものである。 There is a device disclosed in Patent Document 1 as a device provided with fine conical projections in order to prevent external light reflection. The device described in Patent Document 1 is provided with a plurality of cone-shaped convex portions (so-called moth-eye structure) provided on the surface of a touch panel located on a display panel and arranged at a pitch equal to or less than the wavelength of visible light. Thus, an attempt is made to reduce external light reflection.
特開２０１２－１８５３３８号公報JP 2012-185338 A
　ところで、自動二輪車等に搭載され、屋外に晒される計器装置は、計器装置の表示を透かして視認させる透光板の内側が曇りやすくなる。これを防止するために、透光板の内面に防曇剤を塗布することが行われている。また、この種の計器装置では、外光反射による視認性の低下を防止することも必要である。そこで、透明板にモスアイ構造を適用することが考えられるが、この場合に防曇剤を用いると、微細な凹凸に防曇剤が埋まってしまい、反射防止効果が発揮されなくなるというジレンマがある。 By the way, an instrument device mounted on a motorcycle or the like and exposed outdoors tends to cloud the inside of the translucent plate that is visible through the display of the instrument device. In order to prevent this, an antifogging agent is applied to the inner surface of the translucent plate. In addition, in this type of instrument device, it is also necessary to prevent a decrease in visibility due to external light reflection. Therefore, it is conceivable to apply a moth-eye structure to the transparent plate. However, if an antifogging agent is used in this case, there is a dilemma that the antifogging agent is buried in fine irregularities and the antireflection effect is not exhibited.
　本発明は、上記実情に鑑みてなされたものであり、反射防止性能と防曇性能が両立され、視認性が良好な計器装置を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an instrument device that has both antireflection performance and antifogging performance and good visibility.
　上記目的を達成するため、本発明に係る計器装置は、
　乗り物に搭載される計器装置であって、
　前記乗り物に関する所定の計測量を表示する表示部と、
　前記表示部の前面側に位置し、前記表示部を透かして視認させる透光部と、を備え、
　前記透光部の前記表示部側には、可視光の波長以下のピッチで配列され、親水性樹脂により形成された複数の錐状突起を有する反射防止部が設けられている、
　ことを特徴とする。 In order to achieve the above-described object, the instrument device according to the present invention includes:
An instrument device mounted on a vehicle,
A display unit for displaying a predetermined measurement amount related to the vehicle;
A translucent part that is located on the front side of the display part and visually recognizes the display part;
On the display part side of the translucent part, an antireflection part having a plurality of conical protrusions arranged with a pitch less than the wavelength of visible light and formed of a hydrophilic resin is provided.
It is characterized by that.
　本発明によれば、反射防止性能と防曇性能が両立され、視認性が良好な計器装置を提供することができる。 According to the present invention, it is possible to provide an instrument device that has both antireflection performance and antifogging performance and good visibility.
本発明の第１実施形態に係る計器装置を示す図であり、（ａ）は平面図、（ｂ）は図１（ａ）に示すＡ－Ａ線概略断面図である。It is a figure which shows the instrument apparatus which concerns on 1st Embodiment of this invention, (a) is a top view, (b) is an AA line schematic sectional drawing shown to Fig.1 (a). 図１（ｂ）に示すＢ部の拡大図である。It is an enlarged view of the B section shown in Drawing 1 (b). 本発明の第２実施形態に係る計器装置の概略断面図である。It is a schematic sectional drawing of the measuring device which concerns on 2nd Embodiment of this invention. 図３に示すＣ部の拡大図である。It is an enlarged view of the C section shown in FIG.
　本発明の一実施形態に係る計器装置を、図面を参照して説明する。 An instrument device according to an embodiment of the present invention will be described with reference to the drawings.
（第１実施形態）
　第１実施形態に係る計器装置１００は、自動二輪車等の車両に搭載され、車速、エンジン回転数、残燃料などの車両に関する計測量をユーザ（主に運転者）に報知するものである。計器装置１００は、例えば、自動二輪車のハンドル近傍に配設され、平面視で図１（ａ）に示す外形を有する。 (First embodiment)
The instrument device 100 according to the first embodiment is mounted on a vehicle such as a motorcycle and notifies a user (mainly a driver) of a measurement amount related to the vehicle such as a vehicle speed, an engine speed, and a remaining fuel. The instrument device 100 is disposed, for example, in the vicinity of a handle of a motorcycle and has an outer shape shown in FIG.
　以下では、構成の理解を容易にするために、計器装置１００を断面で表した図１（ｂ）における上側を「前面側」、下側を「背面側」として、計器装置１００を構成する各部を適宜、説明する。 In the following, in order to facilitate understanding of the configuration, each part of the instrument device 100 is defined with the upper side in FIG. 1B representing the instrument device 100 in cross section as the “front side” and the lower side as the “back side”. Will be described as appropriate.
　計器装置１００は、図１（ａ）（ｂ）に示すように、表示部１０と、回路基板２０と、透光板３０と、第１のケース４０と、第２のケース５０と、反射防止部６０と、を備える。
　なお、透光板３０と反射防止部６０とは、表示部１０の前面側に位置し、表示部１０を透かして視認させる透光部９０を構成する。 As shown in FIGS. 1A and 1B, the instrument device 100 includes a display unit 10, a circuit board 20, a translucent plate 30, a first case 40, a second case 50, and antireflection. Unit 60.
The translucent plate 30 and the antireflection unit 60 constitute a translucent unit 90 that is located on the front side of the display unit 10 and allows the display unit 10 to be seen through.
　表示部１０は、前述した車速などの計測量を表示するものであり、ディスプレイ１１と、意匠板１２と、を有する。 The display unit 10 displays a measurement amount such as the vehicle speed described above, and includes a display 11 and a design plate 12.
　ディスプレイ１１は、例えば、液晶ディスプレイ（ＬＣＤ：Liquid Crystal Display）から構成され、後述の制御部（図示せず）の制御の下で、車速などの計測量を表示する。具体的には、ディスプレイ１１は、液晶パネル、このパネルを背面から照明するバックライト、液晶パネルに対して電気信号を供給する駆動回路等から構成されている。なお、ディスプレイ１１は、有機ＥＬ（Electro-Luminescence）ディスプレイなどであってもよい。 The display 11 is composed of, for example, a liquid crystal display (LCD) and displays a measurement amount such as a vehicle speed under the control of a control unit (not shown) described later. Specifically, the display 11 includes a liquid crystal panel, a backlight that illuminates the panel from the back, a drive circuit that supplies an electric signal to the liquid crystal panel, and the like. The display 11 may be an organic EL (Electro-Luminescence) display.
　なお、ディスプレイ１１による計測量の表示は、計測値を数字や文字で具体的に表示する態様だけでなく、バーグラフや指針画像を表示することで、ユーザに計測量を対比判読させる態様を含む。 In addition, the display of the measurement amount on the display 11 includes not only a mode in which the measurement value is specifically displayed with numbers and characters but also a mode in which the user reads the measurement amount by displaying a bar graph or a pointer image. .
　意匠板１２は、例えば、ポリカーボネート等の透光性板材の前面及び／又は背面に印刷層を形成したものである。意匠板１２は、ディスプレイ１１の前面側に位置し、形成された開口部１２ａからディスプレイ１１の表示面を覗かせる一方で、板材の略全域に渡って形成された遮光性印刷部分で、ディスプレイ１１の表示面以外の部分を覆い隠す。 The design board 12 is formed by forming a printing layer on the front surface and / or the back surface of a translucent plate material such as polycarbonate. The design plate 12 is located on the front side of the display 11 and allows the display surface of the display 11 to be viewed from the formed opening 12a, while being a light-shielding print portion formed over substantially the entire area of the plate material. Cover other parts of the screen.
　なお、意匠板１２の遮光性印刷部分の所定箇所に、例えば、切り欠き状（抜き文字状）に透光部分を設け、この透光部分により、方向指示器の状態や、ライトの点灯状態などの各種警告を表す記号（文字、図形、アイコンを含む）を形成し、ワーニング表示を実現してもよい。この場合、回路基板２０に実装された光源（例えばＬＥＤ（Light Emitting Diode））によって前記の透光部分が背後から照明されることにより、ワーニング表示が点灯状態となる。 In addition, a light-transmitting portion is provided in a predetermined portion of the light-shielding printed portion of the design plate 12, for example, in a cutout shape (a letter character shape), and this light-transmitting portion allows the state of the direction indicator, the lighting state of the light, etc. A warning display may be realized by forming symbols (including characters, figures, and icons) representing various warnings. In this case, the light-transmitting portion is illuminated from behind by a light source (for example, an LED (Light Emitting Diode)) mounted on the circuit board 20, so that the warning display is turned on.
　回路基板２０は、図示しない制御部やワーニング表示を点灯するための光源などが実装されたプリント回路板から構成される。回路基板２０は、ディスプレイ１１の背面側に位置する。
　制御部は、マイクロコンピュータ等から構成され、ＥＣＵ（Electronic Control Unit）や、車速センサ等の各種センサから、各種の計測量を示すデータを取得する。このように取得したデータに基づいて、制御部は、ディスプレイ１１に車速などの計測量を表示させる。また、例えば、制御部は、ＥＣＵ等から取得した各種警告を示す信号に応じて、ワーニング用の光源を発光させる。 The circuit board 20 includes a printed circuit board on which a control unit (not shown) and a light source for lighting a warning display are mounted. The circuit board 20 is located on the back side of the display 11.
The control unit includes a microcomputer or the like, and acquires data indicating various measurement amounts from various sensors such as an ECU (Electronic Control Unit) and a vehicle speed sensor. Based on the data thus obtained, the control unit causes the display 11 to display a measurement amount such as a vehicle speed. Further, for example, the control unit causes the warning light source to emit light according to signals indicating various warnings acquired from the ECU or the like.
　透光板３０は、前述のように、表示部１０を透かして視認させる透光部９０を構成する。透光部９０は、透光板３０の他に、透光板３０の背面に積層して設けられる、後述の反射防止部６０と両面粘着テープ７０を有する。
　透光板３０は、ＰＭＭＡ（ポリメタクリル酸メチル樹脂）などの透光性の樹脂からなり、表示部１０の前面側に位置する。透光板３０は、前面側に向かって凸となるレンズ形状で形成されている。これにより、外光が運転者に向かって反射することが抑制され、表示部１０の視認性が保たれる。 As described above, the translucent plate 30 constitutes the translucent unit 90 that allows the display unit 10 to be seen through. In addition to the translucent plate 30, the translucent unit 90 includes an antireflection unit 60 and a double-sided adhesive tape 70, which will be described later, provided on the back surface of the translucent plate 30.
The translucent plate 30 is made of a translucent resin such as PMMA (polymethyl methacrylate resin) and is located on the front side of the display unit 10. The translucent plate 30 is formed in a lens shape that is convex toward the front side. Thereby, it is suppressed that external light reflects toward a driver | operator, and the visibility of the display part 10 is maintained.
　第１のケース４０は、遮光性の樹脂などからなり、前面側に形成された開口部４１で透光板３０（透光部９０）の外縁を保持する。第１ケース４０は、透光板３０とインサート成形などにより、一体に形成され、これにより、計器装置１００の前面側から水などが浸入することが防止されている。 The first case 40 is made of a light-shielding resin or the like, and holds the outer edge of the translucent plate 30 (the translucent portion 90) with an opening 41 formed on the front side. The first case 40 is formed integrally with the translucent plate 30 by insert molding or the like, thereby preventing water and the like from entering from the front side of the instrument device 100.
　第２のケース５０は、遮光性の樹脂などからなり、前面側に開口した箱状に形成されている。第２のケース５０は、第１のケース４０と互いの外周部において嵌合し、一体となって内部に略密閉空間を形成する。この略密閉空間内に、表示部１０や回路基板２０が収容される。第１のケース４０と第２のケース５０とは、例えばシール材（図示せず）を介して結合され、結合部分が防水される。また、第２のケース５０の背面には、回路基板２０と計器装置１００の外部とを接続するワイヤーハーネスを通す挿通孔（図示せず）が設けられている。この挿通孔もシール材により隙間部分が防水される。また、第２のケース５０の背面には、図示しない通気孔が複数設けられている。これらの通気孔は、多孔質膜で塞がれており、計器装置１００の内部と外部とを通気可能としつつも、防水されている。 The second case 50 is made of a light shielding resin or the like, and is formed in a box shape opened on the front side. The second case 50 is fitted to the first case 40 at the outer periphery of each other and integrally forms a substantially sealed space inside. The display unit 10 and the circuit board 20 are accommodated in the substantially sealed space. The first case 40 and the second case 50 are coupled through, for example, a sealing material (not shown), and the coupled portion is waterproofed. Further, an insertion hole (not shown) through which a wire harness connecting the circuit board 20 and the outside of the instrument device 100 passes is provided on the back surface of the second case 50. This insertion hole is also waterproofed by the sealing material. A plurality of vent holes (not shown) are provided on the back surface of the second case 50. These vent holes are closed with a porous film and are waterproofed while allowing the inside and outside of the instrument device 100 to be vented.
　なお、表示部１０や回路基板２０などの内機は、第１のケース４０と第２のケース５０のいずれに固定されていてもよい。内機は、両ケースに挟持される構造などであってもよい。内機のケースに対する固定・配設構造は、組み付けの容易さや、耐振性などを考慮の上、適切なものを採用すればよい。また、第１のケース４０及び／又は第２のケース５０は、複数の部材が組み合わされて構成されていてもよい。 Note that the internal units such as the display unit 10 and the circuit board 20 may be fixed to either the first case 40 or the second case 50. The internal unit may have a structure that is sandwiched between both cases. As the fixing / arrangement structure for the case of the internal unit, an appropriate one may be adopted in consideration of ease of assembly and vibration resistance. Further, the first case 40 and / or the second case 50 may be configured by combining a plurality of members.
　以上のように構成される第１のケース４０と第２のケース５０とにより、計器装置１００の内部へと水が浸入することが防止されている。前述の通気孔により、両ケース内に形成される空間は、ある程度の通気状態が保たれた略密閉空間となっているが、このような構造上、計器装置１００の内部と外部との通気が限定的になるため、屋内用途の表示装置などに比べ、透光板３０の内側が曇りやすい。
　本実施形態に係る計器装置１００は、次に説明する反射防止部６０により、外光の反射防止性能に併せて、防曇性能を確保している。 The first case 40 and the second case 50 configured as described above prevent water from entering the instrument device 100. The space formed in both cases by the above-mentioned ventilation holes is a substantially sealed space in which a certain degree of ventilation is maintained. Due to such a structure, ventilation between the inside and outside of the instrument device 100 is performed. Since it becomes limited, the inner side of the translucent plate 30 is likely to be cloudy as compared with a display device for indoor use.
The instrument device 100 according to the present embodiment ensures anti-fogging performance along with anti-reflection performance of external light by the anti-reflection unit 60 described below.
　反射防止部６０は、透光部９０の背面側に設けられている。反射防止部６０は、図２に示すように、フィルム状の基材６１に、モスアイ構造の凹凸層６２がコーティングされることで構成されるフィルム（シート）である。 The antireflection part 60 is provided on the back side of the translucent part 90. As shown in FIG. 2, the antireflection portion 60 is a film (sheet) configured by coating a film-like base material 61 with a concavo-convex layer 62 having a moth-eye structure.
　基材６１は、トリアセチルセルロース（ＴＡＣ）、ポリエチレンテレフタラート（ＰＥＴ），ポリカーボネート（ＰＣ）等の樹脂から形成されている。基材６１としては、例えば厚さ５～３００μｍ程度で、光学的特性に優れた材料が選定される。 The base material 61 is made of a resin such as triacetyl cellulose (TAC), polyethylene terephthalate (PET), polycarbonate (PC). As the substrate 61, for example, a material having a thickness of about 5 to 300 μm and excellent in optical characteristics is selected.
　凹凸層６２は、モスアイ構造で形成されるものであり、複数の錐状突起６２ａが、可視光の波長以下のピッチＰで二次元的（基材６１の背面に沿って）に配列されることで構成されている。 The concavo-convex layer 62 is formed with a moth-eye structure, and a plurality of conical projections 62a are arranged two-dimensionally (along the back surface of the substrate 61) with a pitch P equal to or less than the wavelength of visible light. It consists of
　錐状突起６２ａの配列ピッチＰは、可視光の波長以下であれば特に限定されるものではないが、反射率の波長依存性に影響を及ぼすため、目的に応じて適切な値となるように形成されている。配列ピッチＰは、例えば、１００ｎｍ程度に設定されている。なお、配列ピッチＰは、数十ｎｍ～数百ｎｍの範囲で適宜変更が可能である。錐状突起６２ａの高さＨも、反射率の波長依存性に影響を及ぼすため、目的に応じて適切な値となるように形成されている。例えば、高さＨは、数１００ｎｍ程度である。 The arrangement pitch P of the conical protrusions 62a is not particularly limited as long as it is equal to or smaller than the wavelength of visible light. However, since it affects the wavelength dependency of the reflectance, the arrangement pitch P should be an appropriate value according to the purpose. Is formed. The arrangement pitch P is set to about 100 nm, for example. The arrangement pitch P can be appropriately changed within a range of several tens of nm to several hundreds of nm. Since the height H of the conical protrusion 62a also affects the wavelength dependency of the reflectance, it is formed to have an appropriate value according to the purpose. For example, the height H is about several hundred nm.
　なお、錐状突起６２ａにおける「錐状」とは、完全な円錐や角錐だけを意味せず、概ね錐体状であればよく、先細りになっている形状（断面楔状）であればよい。また、錐状突起６２ａの先端部は、図２に示すように曲面状であってもよく、尖っていなくともよい。また、錐状突起６２ａの先端部を平坦にすることもできる。錐状突起６２ａは、モスアイ構造を実現するために先細りに形成される必要があるが、製造上の制約や目的に応じて、適宜変化されるものである。 It should be noted that the “conical shape” in the conical protrusion 62 a does not mean only a complete cone or a pyramid, but may be generally a cone shape or a tapered shape (cross-sectional wedge shape). Further, the tip of the conical protrusion 62a may be curved as shown in FIG. 2 or may not be sharp. Moreover, the front-end | tip part of the cone-shaped protrusion 62a can also be made flat. The conical protrusions 62a need to be tapered in order to realize a moth-eye structure, but may be changed as appropriate according to manufacturing restrictions and purposes.
　反射防止部６０は、基材６１上に、光硬化性（ＵＶ（Ultraviolet）、ＥＢ（Electron Beam）硬化性など）及び親水性を有する樹脂からなる層を形成後、スタンパでモスアイ形状を転写し、光照射により当該樹脂層を硬化させることで凹凸層６２を形成して、製造される。例えば、凹凸層６２は、ＵＶ硬化性樹脂中に親水性ポリマー（タンパク質、ポリエステルアミドなど）を含有させた材料、ＵＶ照射時に親水性を示す光触媒（酸化チタン）を用いた材料などから構成される。このようにして、親水性樹脂からなる凹凸層６２が形成される。 The antireflection part 60 forms a layer made of a resin having photocurability (UV (Ultraviolet), EB (ElectronElectroBeam) curability, etc.)) and hydrophilicity on the substrate 61, and then transfers the moth-eye shape with a stamper. The uneven layer 62 is formed by curing the resin layer by light irradiation. For example, the concavo-convex layer 62 is composed of a material in which a hydrophilic polymer (protein, polyesteramide, etc.) is contained in a UV curable resin, a material using a photocatalyst (titanium oxide) that exhibits hydrophilicity during UV irradiation, or the like. . Thus, the uneven | corrugated layer 62 which consists of hydrophilic resin is formed.
　なお、ポリエチレン、ポリプロピレンなどの熱可塑性を有する樹脂に親水性を付与した樹脂（熱可塑性及び親水性を有する樹脂）からなる基材６１に、ヒートサイクル成形により、スタンパでモスアイ形状（可視光の波長以下のピッチで配列された複数の錐状突起を有する形状）を転写することで、反射防止部６０を製造してもよい。 In addition, a moth-eye shape (wavelength of visible light) is formed on a base material 61 made of a resin (thermoplastic and hydrophilic resin) obtained by imparting hydrophilicity to a thermoplastic resin such as polyethylene or polypropylene by heat cycle molding. The antireflection part 60 may be manufactured by transferring a shape having a plurality of conical protrusions arranged at the following pitch.
　反射防止部６０は、高透明性を有する両面粘着テープ７０によって、透光板３０の背面に密着固定されている。なお、反射防止部６０は、透光板３０を射出成形する際に、透光板３０に溶融固着されてもよい。 The antireflection part 60 is closely fixed to the back surface of the translucent plate 30 with a double-sided adhesive tape 70 having high transparency. The antireflection part 60 may be melted and fixed to the light transmitting plate 30 when the light transmitting plate 30 is injection-molded.
　また、透光板３０の背面に、フィルムからなる反射防止部６０を固定・固着する方法でなく、親水性樹脂からなる透光板３０の背面に直接、射出成形によりモスアイ構造を形成することで、反射防止部６０が設けられた透光部９０が実現されてもよい。この場合は、基材６１や両面粘着テープ７０を介さず、透光板３０に直接、反射防止部６０が形成されることになる。 In addition, the moth-eye structure is formed directly on the back surface of the translucent plate 30 made of a hydrophilic resin, not by a method of fixing and fixing the antireflection portion 60 made of a film on the back surface of the translucent plate 30. The translucent part 90 provided with the antireflection part 60 may be realized. In this case, the antireflection part 60 is formed directly on the translucent plate 30 without using the base material 61 or the double-sided adhesive tape 70.
　以上の構成からなる計器装置１００は、透光部９０の背面側に、モスアイ構造を利用した反射防止部６０が設けられている。この構造により、計器装置１００外部から入射し、透光部９０から、透光部９０と表示部１０との間の空気層へと透過する光に対する屈折率を、透光部９０から空気層にかけて連続的に変化させることができる（屈折率に不連続な界面が生じることを避けることができる）。このため、入射光が透光部９０の背面で界面反射することが抑制され、外景や太陽光、照明の映り込みが少なくなり、表示部１０の視認性が向上する。また、反射防止部６０が設けられた透光部９０では、表示部１０から出射された光（ディスプレイ１１の表示画像を表す光や、点灯したワーニング表示からの光）の透過率が高まるため、ディスプレイ１１のバックライトやワーニング用の光源の発光輝度を必要以上に大きくする必要がなく、計器装置１００の消費電力を抑えることができる。また、表示部１０と透光部９０との間で光の反射が繰り返されることにより発生する虚像（通称ゴースト）の発生も抑制できる。 The instrument device 100 having the above configuration is provided with an antireflection portion 60 using a moth-eye structure on the back side of the light transmitting portion 90. With this structure, the refractive index for light incident from the outside of the instrument device 100 and transmitted from the light transmitting part 90 to the air layer between the light transmitting part 90 and the display part 10 is applied from the light transmitting part 90 to the air layer. It can be continuously changed (a discontinuous interface in the refractive index can be avoided). For this reason, it is suppressed that incident light is interface-reflected by the back surface of the translucent part 90, the reflection of an external scene, sunlight, and illumination decreases, and the visibility of the display part 10 improves. Further, in the translucent unit 90 provided with the antireflection unit 60, the transmittance of light emitted from the display unit 10 (light representing the display image of the display 11 and light from the lit warning display) is increased. It is not necessary to increase the luminance of the backlight of the display 11 or the light source for warning more than necessary, and the power consumption of the instrument device 100 can be suppressed. Moreover, generation | occurrence | production of the virtual image (popular name ghost) generate | occur | produced by repeating reflection of light between the display part 10 and the translucent part 90 can also be suppressed.
　また、凹凸層６２は、親水性樹脂から構成されることによる濡れ性と、モスアイ構造との相乗効果によって、計器装置１００内に存在する水分の凝集によってできた水が、透光部９０の背面に形成されても、光を乱反射させる粒径（数μｍ～数十μｍ）の微細な水滴とならず、且つ、接触角が鈍角な状態で保持されることを防ぐことができるため、曇りとして白く視認されることを防止することができる。
　つまり、凹凸層６２により、見かけ上の接触角が極めて小さい超親水状態を実現することで、凝集によってできた水が、ミー反射を引き起こす微細な水滴として形成されることがないため、透光部９０の内側に生じる曇りが防止される。結果として防曇剤の塗布が不要となる程度の防塵効果を得ることができる。 In addition, the uneven layer 62 has a back surface of the translucent part 90 that is formed by agglomeration of moisture existing in the instrument device 100 due to a synergistic effect of the wettability due to the hydrophilic resin and the moth-eye structure. Even if it is formed, it is not a fine water droplet with a particle size (several μm to several tens μm) that diffusely reflects light, and it is possible to prevent the contact angle from being held in an obtuse state. It can prevent being visually recognized as white.
That is, since the uneven layer 62 realizes a superhydrophilic state with an extremely small apparent contact angle, water formed by aggregation is not formed as fine water droplets that cause Mie reflection. The fogging occurring inside 90 is prevented. As a result, it is possible to obtain a dustproof effect to the extent that application of an antifogging agent becomes unnecessary.
　以上に説明したように、計器装置１００は、反射防止性能と防曇性能が両立され、視認性が良好である。以上のモスアイ構造は、様々な計器に適用可能である。以下では、その一例として、アナログ計器にモスアイ構造を適用した第２実施形態を図３、図４を参照して説明する。
　なお、以下の第２実施形態の説明では、理解を容易にするために、第１実施形態で説明したものと同様の機能を有する各部については第１実施形態と同じ符号を付し、異なる点を中心に説明する。 As described above, the instrument device 100 has both good anti-reflection performance and anti-fogging performance and good visibility. The above moth-eye structure can be applied to various instruments. Hereinafter, as an example, a second embodiment in which a moth-eye structure is applied to an analog instrument will be described with reference to FIGS. 3 and 4.
In the following description of the second embodiment, in order to facilitate understanding, each part having the same function as that described in the first embodiment is denoted by the same reference numeral as in the first embodiment, and is different. The explanation will be focused on.
（第２実施形態）
　第２実施形態に係る計器装置２００は、図３、図４に示すように、計測量を指針２１１を用いて表示する表示部２１０と、透光板３０と反射防止部６０に加えて加飾部８０を有する透光部２９０と、を備えている。
　なお、計器装置２００としては、スピードメータ、タコメータなど種々のものに適用可能であるが、以下では説明の理解を容易にするため、計器装置２００がスピードメータであるものとする。 (Second Embodiment)
As shown in FIGS. 3 and 4, the instrument device 200 according to the second embodiment is decorated in addition to the display unit 210 that displays the measurement amount using the pointer 211, the translucent plate 30, and the antireflection unit 60. A translucent part 290 having a part 80.
The instrument device 200 can be applied to various devices such as a speedometer and a tachometer. In the following description, the instrument device 200 is assumed to be a speedometer in order to facilitate understanding of the description.
　表示部２１０は、指針２１１と、文字板２１２とを有する。
　文字板２１２には、指針２１１の指示対象となる指標部（目盛り、数字などからなる）が形成されている。指標部は、例えば、前述の意匠板１２と同様にして、遮光性印刷層を切り欠いて形成される透光部分により形成される。指針２１１は、文字板２１２上を、車速に応じて回転する。表示部２１０は、指針２１１の指示箇所と指標部とを対比判読させることにより、車速をユーザに報知する。指針２１１は、図示しない回路基板（前述の回路基板２０と同様の構成）に実装されたステッピングモータの動力により回転する。このモータは、制御部の制御の下で動作し、車速センサから供給される車速信号に応じて指針２１１を回転させる。 The display unit 210 includes a pointer 211 and a dial plate 212.
On the dial 212, an indicator portion (made of scales, numbers, etc.) to be indicated by the pointer 211 is formed. The indicator portion is formed by a light-transmitting portion formed by cutting out the light-shielding print layer, for example, in the same manner as the design plate 12 described above. The pointer 211 rotates on the dial 212 according to the vehicle speed. The display unit 210 informs the user of the vehicle speed by causing the indicated part of the pointer 211 and the indicator part to be compared and read. The pointer 211 is rotated by the power of a stepping motor mounted on a circuit board (not shown) (the same configuration as the circuit board 20 described above). This motor operates under the control of the control unit, and rotates the pointer 211 in accordance with the vehicle speed signal supplied from the vehicle speed sensor.
　透光部２９０において透光板３０は、前面側に凸となるレンズ形状（曲面形状）で形成され、指針２１１の回転中心付近が最も飛び出るように構成されている。このように構成することで、環境温度変化により、レンズの膨張率と、反射防止部６０を構成するフィルムとの膨張率の違いからバイメタル効果によりレンズ面が変形してしまっても、平面形状のレンズに比べて変形が目立ちにくい。また、レンズ状に透光板３０を形成すれば、指針２１１との隙間を確保し易いので、計器装置２００を薄型にすることができるという利点もある。 In the light transmitting portion 290, the light transmitting plate 30 is formed in a lens shape (curved surface shape) that is convex on the front surface side, and is configured so that the vicinity of the rotation center of the pointer 211 protrudes most. With this configuration, even if the lens surface is deformed due to the bimetal effect due to the difference between the expansion coefficient of the lens and the expansion coefficient of the film constituting the antireflection part 60 due to environmental temperature changes, Deformation is less noticeable compared to lenses. Further, if the translucent plate 30 is formed in a lens shape, it is easy to ensure a gap with the pointer 211, so that there is an advantage that the instrument device 200 can be made thin.
　加飾部８０は、透光板３０と反射防止部６０との間の一部に形成されている。加飾部８０は、透光板３０の背面にパッド印刷により形成された印刷層や、基材６１の前面にスクリーン印刷により形成された印刷層や、透光板３０の背面に窪み（彫り込み）を設けることによって形成される空気層などからなる（図４では、加飾部８０が空気層により構成される例を示した）。 The decoration part 80 is formed in a part between the translucent plate 30 and the antireflection part 60. The decoration unit 80 is a printed layer formed by pad printing on the back surface of the translucent plate 30, a printed layer formed by screen printing on the front surface of the substrate 61, or a depression (engraved) on the back surface of the translucent plate 30. (In FIG. 4, the example in which the decorating unit 80 is configured by an air layer is shown).
　加飾部８０は、計器装置２００を前面側から見たときに、例えば、枠や、同心円状の模様などを表現する。なお、加飾部８０の意匠は、様々な態様が可能であり限定されるものではない。このような加飾部８０を設けると、その形成部分において、反射防止部６０の反射防止効果が排除されるため、加飾部８０の形成部分における反射光が強調される。これにより、透光部２９０の前面側から入射し、加飾部８０の形成部分において反射する光と、その他の部分において反射する光との間に強いコントラストが付与され、加飾部８０が浮き上がって視認されるような斬新な加飾が可能となる。なお、加飾部８０により、指針２１１の指示対象である指標部の少なくとも一部を表現することも可能である。この場合、加飾部８０により形成される指標部は、透光部２９０を透かして視認される指針２１１に指示されることになる。 The decoration unit 80 represents, for example, a frame or a concentric pattern when the instrument device 200 is viewed from the front side. In addition, the design of the decoration part 80 can have various aspects, and is not limited. When such a decoration part 80 is provided, the antireflection effect of the antireflection part 60 is eliminated in the formation part, and thus the reflected light in the formation part of the decoration part 80 is emphasized. Thereby, a strong contrast is provided between the light that is incident from the front side of the translucent part 290 and reflected at the part where the decorative part 80 is formed, and the light reflected at the other part, and the decorative part 80 is raised. Innovative decoration that can be visually recognized is possible. Note that the decorating unit 80 can also express at least a part of the index unit that is the target of the pointer 211. In this case, the indicator part formed by the decoration part 80 is instructed by the pointer 211 that is visually recognized through the light transmitting part 290.
　以上に説明した第２実施形態に係る計器装置２００よれば、親水性を有するモスアイ構造により反射防止性能と防曇性能に優れることに加え、斬新な加飾が可能である。 According to the instrument device 200 according to the second embodiment described above, in addition to being excellent in antireflection performance and antifogging performance due to the hydrophilic moth-eye structure, novel decoration is possible.
　なお、本発明は以上の実施形態及び図面によって限定されるものではない。本発明の要旨を変更しない範囲で、適宜、変更（構成要素の削除も含む）を加えることが可能である。 In addition, this invention is not limited by the above embodiment and drawing. Changes (including deletion of components) can be made as appropriate without departing from the scope of the present invention.
　透光板３０の前面に、ＡＲ（Anti-Reflective）コートを施し、さらに反射低減効果を得ることも可能である。ＡＲコートは、例えば、フッ化マグネシウムなどを真空蒸着させる手法で形成される。また、透光板３０の背面側だけでなく、前面側にもモスアイ構造を設けることも可能である。また、透光板３０は、凸レンズ形状でなくともよいし、有色透明であってもよい。 It is also possible to obtain an anti-reflection effect by applying an anti-reflective (AR) coat on the front surface of the light-transmitting plate 30. The AR coat is formed, for example, by a technique of vacuum-depositing magnesium fluoride or the like. It is also possible to provide a moth-eye structure not only on the back side of the translucent plate 30 but also on the front side. Further, the translucent plate 30 does not have to be a convex lens shape, and may be colored and transparent.
　また、計器装置１００のようなデジタル計器に加飾部８０を設けても、勿論よい。 Of course, the decoration unit 80 may be provided in a digital instrument such as the instrument device 100.
　計器装置１００，２００が搭載される乗り物は、自動二輪車に限定されるものではない。ただし、自動二輪車、農耕機械、船舶、スノーモービル、ジェットスキーなど、計器装置が屋外に晒される態様で搭載される乗り物に、特に好適である。外光の影響が大きく、また、防水性の観点から通気が制限されると共に、環境温度の変化が大きいため、曇りやすいからである。 The vehicle on which the instrument devices 100 and 200 are mounted is not limited to a motorcycle. However, the present invention is particularly suitable for vehicles on which instrument devices are exposed to the outdoors, such as motorcycles, agricultural machines, ships, snowmobiles, and jet skis. This is because the influence of outside light is great, and airflow is restricted from the viewpoint of waterproofness, and the environmental temperature is greatly changed, so that it is easily cloudy.
　以上の説明では、本発明の理解を容易にするために、重要でない公知の技術的事項の説明を適宜省略した。 In the above description, in order to facilitate the understanding of the present invention, explanations of known unimportant technical matters are appropriately omitted.
　　本発明は、計器装置に関し、例えば、自動車やオートバイ、あるいは農業機械や建設機械を備えた移動体に搭載される計器装置に適用できる。 The present invention relates to an instrument device, and can be applied to, for example, an instrument device mounted on a moving body including an automobile, a motorcycle, an agricultural machine, or a construction machine.
１００，２００　計器装置
１０，２１０　表示部
１１　ディスプレイ
１２　意匠板
２１１　指針
２１２　文字板
２０　回路基板
３０　透光板
４０　第１のケース
５０　第２のケース
６０　反射防止部
６１　基材
６２　凹凸層
６２ａ　錐状突起
７０　両面粘着テープ
８０　加飾部
９０，２９０　透光部 100, 200 Instrument device 10, 210 Display unit 11 Display 12 Design plate 211 Pointer 212 Dial 20 Circuit board 30 Translucent plate 40 First case 50 Second case 60 Antireflection unit 61 Base material 62 Concavity and convexity layer 62a Conical shape Protrusion 70 Double-sided adhesive tape 80 Decorating part 90, 290 Translucent part

Claims (5)

  1. 　乗り物に搭載される計器装置であって、
    　前記乗り物に関する所定の計測量を表示する表示部と、
    　前記表示部の前面側に位置し、前記表示部を透かして視認させる透光部と、を備え、
    　前記透光部の前記表示部側には、可視光の波長以下のピッチで配列され、親水性樹脂により形成された複数の錐状突起を有する反射防止部が設けられている、
    　ことを特徴とする計器装置。     An instrument device mounted on a vehicle,
    A display unit for displaying a predetermined measurement amount related to the vehicle;
    A translucent part that is located on the front side of the display part and visually recognizes the display part;
    On the display part side of the translucent part, an antireflection part having a plurality of conical protrusions arranged with a pitch less than the wavelength of visible light and formed of a hydrophilic resin is provided.
    An instrument device characterized by that.
  2. 　前記透光部は、透光板を含み、
    　前記反射防止部は、前記透光板の前記表示部側の面に固定された、前記複数の錐状突起を有するフィルムから構成される、
    　ことを特徴とする請求項１に記載の計器装置。     The translucent part includes a translucent plate,
    The antireflection portion is composed of a film having the plurality of conical protrusions fixed to the surface of the light transmitting plate on the display portion side.
    The instrument device according to claim 1.
  3. 　前記透光部は、前記表示部とは反対側に向かって凸となるレンズ形状で形成されている、
    　ことを特徴とする請求項１又は２に記載の計器装置。     The translucent part is formed in a lens shape that is convex toward the side opposite to the display part,
    The instrument device according to claim 1 or 2, characterized in that.
  4. 　前記透光板と前記反射防止部との間の一部に、印刷層又は空気層からなる加飾部が形成されている、
    　ことを特徴とする請求項２に記載の計器装置。     In a part between the translucent plate and the antireflection part, a decorative part made of a printing layer or an air layer is formed,
    The instrument device according to claim 2.
  5. 　前記透光部の外縁を保持する第１のケースと、
    　前記表示部を挟んで前記第１のケースとは反対側に位置する第２のケースと、をさらに備え、
    　前記第１のケースと前記第２のケースとは、一体となって内部に前記表示部を収容する略密閉空間を形成する、
    　ことを特徴とする請求項１乃至４のいずれか１項に記載の計器装置。     A first case for holding an outer edge of the translucent part;
    A second case located on the opposite side of the first case across the display unit,
    The first case and the second case integrally form a substantially sealed space that accommodates the display unit inside.
    The instrument device according to any one of claims 1 to 4, wherein
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