JP2018132429A - Measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring instrument capable of having a display part and a ring-shaped member given a sense of unity to suppress the measuring instrument from being less attractive.SOLUTION: A measuring instrument comprises: a display part which displays measured amounts; a translucent plate which is located on a front side of the display part and allows the display part to be seen through; a ring-shaped member 8 which has a front part 8a covering a front-side end part of the translucent plate; and an antireflection part which is provided on a display part-side surface of the translucent plate, and has a plurality of conic projections arrayed at a pitch equal to or less than a wavelength of visible light. The display part has a display plate 11 formed by forming a fine unevenness part 11e in a predetermined pattern on the front of a translucent substrate and also forming a ground color layer with a predetermined color tone on the back of the substrate, and the ring-shaped member 8 has the other ground color layer, having a color tone similar to that of the ground color layer, and/or the other fine unevenness part 8d in a pattern similar to that of the fine unevenness part 11e formed at a front part 8a.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a meter, and more particularly, to a meter including an antireflection portion having a fine conical protrusion.

  As an instrument provided with an antireflection part having fine conical projections, there is one disclosed in Patent Document 1. The instrument described in Patent Document 1 has a film (a film using a so-called moth-eye structure) having a plurality of conical convex portions arranged on the back surface of the cover plate at a pitch less than or equal to the wavelength of visible light. By providing, it tried to reduce external light reflection.

JP2015-78924A

  The instrument described in Patent Document 1 is provided with the film (antireflection portion) over the entire back surface of the cover plate, so that the display portion that is visible through the cover plate can be clearly seen. Can be obtained. On the other hand, in an instrument, it is common to provide a ring-shaped member that covers the front side end of the cover plate for the purpose of decoration. However, if no measures are taken on the ring-shaped member with respect to the display portion that can be clearly seen by the antireflection portion, the sense of unity of both may be impaired, and the appearance of the entire instrument may be reduced.

  The present invention has been made in view of the above circumstances, and in an instrument equipped with an anti-reflection part, the instrument can give a sense of unity between the display part and the ring-shaped member and suppress deterioration in the appearance of the entire instrument. The purpose is to provide.

In order to achieve the above object, a meter according to the present invention includes a display unit for displaying a measured amount,
A translucent plate that is located on the front side of the display unit and visually recognizes the display unit;
A ring-shaped member having a front portion covering the front side end portion of the translucent plate;
An antireflection portion provided on a surface of the light transmitting plate on the display portion side and having a plurality of conical protrusions arranged at a pitch equal to or less than a wavelength of visible light;
The display unit has a display plate in which a fine uneven portion having a predetermined pattern is formed on the front surface of a light-transmitting substrate, and a ground color layer having a predetermined color tone is formed on the back surface of the substrate,
The ring-shaped member is formed with another ground color layer having the same color tone as the ground color layer and / or other fine uneven portions having a pattern similar to the fine uneven portion on the front portion. ,
It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, a display part and a ring-shaped member can have a sense of unity, and the fall of the appearance of the whole instrument can be suppressed.

It is a figure which shows the meter 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). It is an enlarged view of the B section shown in Drawing 1 (b). It is an enlarged view of the C section shown in FIG. (A) It is the sectional view on the AA line shown to Fig.1 (a), (b) It is the FF sectional view taken on the line shown to Fig.1 (a). It is an enlarged view of the G section shown in Drawing 1 (a). It is the HH sectional view taken on the line shown to Fig.1 (a).

  An embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
The meter 100 according to the first embodiment is configured as a pointer-type meter that displays a measurement amount with a pointer 10 as shown in FIGS. The instrument 100 is mounted on a vehicle, for example, and displays measurement amounts relating to the vehicle such as vehicle speed, engine speed, and remaining fuel to a user (mainly a driver). In the present embodiment, the instrument 100 is a so-called turbometer that displays an intake pressure (supercharging pressure) as a measurement amount related to the vehicle, and can display the intake pressure in a range from −100 kPa to +200 kPa.

  In the following, in order to facilitate understanding of the configuration, the upper part in FIG. 1B showing the instrument 100 in cross section is referred to as “front side” and the lower side is referred to as “rear side”, and each part constituting the instrument 100 is appropriately set. ,explain. In addition, in consideration of legibility, hatching indicating a cross section in FIGS. 1B and 3 (also in FIG. 4) is appropriately omitted.

  As shown in FIGS. 1A and 1B, the instrument 100 includes a display unit 1, a translucent plate 2, an antireflection unit 3, a case 4, a turning member 5, a packing 6, A bezel 7 and a ring-shaped member 8 are provided. In FIG. 3, the ring-shaped member 8 is omitted.

  The display unit 1 displays a measurement amount such as the vehicle speed described above, and includes a pointer 10, a display board 11, a circuit board 12, and a middle case 13.

  The pointer 10 is rotatable on the front side of the display board 11 and points to an indicator portion 11a (see FIG. 1A) formed on the display board 11. The indicator part 11a is composed of a scale, a numerical value, and the like. The display unit 1 informs the user of the measurement amount by causing the indication portion of the pointer 10 and the indicator unit 11a to be read in comparison. Note that at least a part of the pointer 10 is formed of a light guide member, and can receive light from the light sources L1 and L2. In addition, the indicator portion 11a is formed with translucency, and can emit light upon receiving light from the light source L3 for display panel.

  The display board 11 will be described in detail later.

  The circuit board 12 is formed of a printed circuit board, and includes a motor 14 (for example, a stepping motor) that rotationally drives the pointer 10, light sources L <b> 1 and L <b> 2 that illuminate the pointer 10, and a display board light source L <b> 3 that illuminates the display board 11. Has been implemented. The motor 14 rotates the pointer 10 attached to the rotating shaft 14a according to the measurement amount.

  The components mounted on the circuit board 12 operate under the control of a control unit (not shown). 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 acquired in this way, the control unit drives the motor 14 to rotate the pointer 10 by a rotation angle corresponding to a measured amount such as a vehicle speed. In addition, the control unit performs lighting control of the light sources L1 and L2 and the display panel light source L3.

  The middle case 13 is located between the display board 11 and the circuit board 12 and supports the display board 11. The middle case 13 is formed of a predetermined resin, for example, in white, and has an illumination chamber 13a that efficiently guides light emitted from the light source L3 for the display plate to the display plate 11. A light guide member 15 that guides the light emitted from the light sources L1 and L2 to the pointer 10 is provided closer to the rotating shaft 14a than the illumination chamber 13a.

  The translucent plate 2 is made of a translucent resin such as PMMA (polymethyl methacrylate resin) and is located on the front side of the display unit 1. The translucent plate 2 is formed in a circular shape in plan view as shown in FIG.

  As shown in an enlarged view in FIG. 2, the antireflection part 3 is a film (sheet) configured by coating a film-like substrate 30 with a concavo-convex layer 31 having a moth-eye structure. The antireflection part 3 is closely fixed to the back surface of the translucent plate 2 with a highly transparent adhesive S. The antireflection portion 3 may be melted and fixed to the light transmitting plate 2 when the light transmitting plate 2 is injection molded.

  The antireflection portion 3 is formed in a circular shape that is slightly smaller than the translucent plate 2 so as to avoid the end 2a (see FIG. 3) of the translucent plate 2. The formation region of the antireflection part 3 will be described in detail later.

  The base material 30 is made of a resin such as triacetyl cellulose (TAC), polyethylene terephthalate (PET), polycarbonate (PC). As the base material 30, for example, a material having a thickness of about 5 to 300 μm and excellent in optical characteristics is selected.

  The concavo-convex layer 31 is formed with a moth-eye structure, and a plurality of conical protrusions 31a are arranged two-dimensionally (along the back surface of the base material 30) with an arrangement pitch P equal to or less than the wavelength of visible light. It is composed of that.

  The arrangement pitch P of the conical protrusions 31a is not particularly limited as long as it is equal to or less than the wavelength of visible light. However, the arrangement pitch P affects the wavelength dependency of the reflectance, so that it becomes 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 the range of several tens of nm to several hundreds of nm. Since the height H of the conical protrusion 31a also affects the wavelength dependence 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 31a does not mean a complete cone or a pyramid, but may be a generally conical shape or a tapered shape (wedge shape in cross section). Further, the tip of the conical protrusion 31a may be curved as shown in FIG. 2, or may not be sharp. Further, the tip of the conical protrusion 31a can be flattened. The conical protrusions 31a need to be tapered at least in order to realize the moth-eye structure, but the detailed structure can be changed as appropriate according to manufacturing restrictions and purposes.

  The antireflection part 3 forms a resin layer having photocurability (UV (Ultraviolet), EB (Electron Beam) curability, etc.)) on the base material 30, and then transfers the moth-eye shape with a stamper. The uneven layer 31 is formed by curing the resin layer, and is manufactured. In addition, it is preferable that the uneven | corrugated layer 31 has hydrophilicity so that it may mention later.

  Thus, by providing the translucent plate 2 with the antireflection portion 3 using the moth-eye structure, it enters from the outside of the instrument 100 and from the translucent plate 2 to the air between the translucent plate 2 and the display unit 1. For light transmitted to the layer, the refractive index 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 board 2, reflection of an external scene, sunlight, and illumination decreases, and the visibility of the display part 1 improves. Further, in the translucent plate 2 provided with the antireflection portion 3 in this way, the transmittance of the light emitted from the display unit 1 (the illumination light of the pointer 10 and the illumination light of the display plate 11) is increased. It is not necessary to increase the light emission luminance of the light sources L1 and L2 and the display panel light source L3 more than necessary, and the power consumption of the meter 100 can be suppressed.

  Note that an AR (Anti-Reflective) coat may be applied to the front surface of the translucent plate 2 to obtain a reflection reduction effect. The AR coat is formed, for example, by a technique of vacuum-depositing magnesium fluoride or the like.

  The case 4 is formed in a bottomed cylindrical shape from resin, metal, or the like, and accommodates the display unit 1. As shown in FIG. 3, a flange 4 a protruding in the outer diameter direction of the case 4 is formed at the opening end of the case 4.

  The facing member 5 is an example of a defining member, and is formed, for example, in black from a predetermined resin or the like, and covers an unnecessary portion inside the meter 100. As shown in FIG. 3, a display region D <b> 1 of the display unit 1 is defined by the turning member 5. The facing member 5 is located between the display unit 1 and the translucent plate 2 and is provided so as to surround the outer periphery of the display unit 1.

  As shown in FIG. 3, the turn-back member 5 is bent from the support portion 50 that supports the end portion 2 a of the translucent plate 2, the inclined portion 51 that is inclined toward the display portion 1, and the support portion 50. And a bent portion 52 that connects the support portion 50 and the inclined portion 51.

  The support portion 50 is a cylindrical portion that is supported by the flange 4 a of the case 4. A step 50 a is formed at the upper end of the support portion 50 in accordance with the end 2 a of the light transmissive plate 2, and the light transmissive plate 2 is placed on the step 50 a.

  The inclined part 51 has a truncated cone shape. The inclined portion 51 is inclined toward the display plate 11 of the display portion 1 from the upper end portion of the support portion 50 through the bent portion 52. The tip of the inclined portion 51 is located at a slight distance from the display panel 11 and does not come into contact therewith.

  As shown in FIG. 3, the inclined portion 51 is located in a region D2 adjacent to the display region D1. Further, the bent portion 52 is located in a region D3 adjacent to the region D2. Moreover, the edge part 2a of the translucent plate 2 clamped by the clamping part 9 mentioned later is located in the area | region D4 adjacent to the area | region D3. In summary, these regions are located in the order of the display region D1, the region D2, the region D3, and the region D4 from the center of the display unit 1 toward the outer diameter direction.

  The packing 6 is made of an elastic member (elastomer or the like) formed in an annular shape so as to extend along the end portion 2a of the circular translucent plate 2. As shown in FIG. 3, the packing 6 has a substantially L-shaped cross section and covers the front surface of the end 2 a of the light-transmitting plate 2 and a part of the side surface.

  In this embodiment, the packing 6 and the facing member 5 constitute a sandwiching portion 9 that sandwiches the end 2 a of the translucent plate 2. The clamping part 9 is caulked from the outer peripheral side by the bezel 7, as will be described later.

  In addition, although the clamping part 9 and the antireflection part 3 are mainly demonstrated with reference to FIG. 3, the clamping part 9 and the antireflection part 3 are the center axis lines (axis line along the rotating shaft 14a) of the display part 1. ) Since it is formed in a rotationally symmetrical manner around, the shape when the sandwiching portion 9 and the antireflection portion 3 are cut along an arbitrary cross section passing through the axis is substantially the same as the shape shown in FIG.

  In the packing 6, a rib 6 a that protrudes toward the end 2 a is formed at a location that covers the front surface of the end 2 a of the translucent plate 2. When the clamping part 9 is caulked by the bezel 7, the translucent plate 2 is clamped mainly by the rib 6a and the support part 50 (step 50a). A groove 6b is formed on the front surface side of the packing 6 so as to correspond to the rib 6a. The groove 6b is provided in order to appropriately maintain the pressure applied from the packing 6 to the light-transmitting plate 2 when the clamping portion 9 is caulked.

  A portion of the packing 6 that covers the side surface of the end portion 2 a of the translucent plate 2 is a hanging portion 6 c that hangs down toward the top surface of the support portion 50 of the turning member 5. In addition, if the clamping part 9 is crimped, the support part 50 and the drooping part 6c will closely_contact | adhere.

  The bezel 7 is a frame made of, for example, metal, and is formed in an annular shape in plan view, like a ring-shaped member 8 described later. As shown in FIG. 3, the bezel 7 is caulked and fixed (caulking and fixing) so as to sandwich the opening end (flange 4 a) of the case 4 and the clamping portion 9 (the turning member 5 and the packing 6). As a result, a force for sandwiching the translucent plate 2 is applied to the sandwiching portion 9, and the sandwiching portion 9 that sandwiches the translucent plate 2 is fixed to the case 4.

  The ring-shaped member 8 is an example of the ring-shaped member of the present invention, and is formed in an annular shape in a plan view from a predetermined resin or the like as shown in FIG. The ring-shaped member 8 is provided mainly for the purpose of decorating the instrument 100. The ring-shaped member 8 includes a front portion 8 a provided so as to cover the front-side end portion of the translucent plate 2. Details of the front portion 8a of the ring-shaped member 8 will be described later together with the display board 11.

(Regarding the formation area of the antireflection part)
From here, the formation region of the antireflection part 3 will be described with reference to FIG.
In the instrument 100 of this embodiment, the antireflection portion 3 is provided so as to avoid the end portion 2 a of the translucent plate 2 sandwiched by the sandwiching portion 9, and is provided so as not to contact the sandwiching portion 9. Specifically, an appropriate clearance (corresponding to the width of the region D3) is provided between the end surface of the antireflection portion 3 and the end portion 2a of the translucent plate 2. Since it did in this way, it can prevent that the reflection preventing part 3 contacts an exterior component by thermal expansion etc., and it peels off or bubbles enter the reflection preventing part 3.

  Further, the tip of the inclined portion 51 (the boundary between the display region D1 and the region D2) is located closer to the center of the display unit 1 than the peripheral end of the antireflection unit 3. According to this positional relationship, the peripheral end of the antireflection portion 3 overlaps with the turning member 5. Therefore, it can suppress that the end surface of the reflection preventing part 3 is visually recognized in the shape of a line through the light-transmitting plate 2, and a decrease in appearance can be suppressed.

  Further, when viewed from the thickness direction of the instrument 100 (vertical direction in FIG. 3), the boundary between the bent portion 52 and the inclined portion 51 (the boundary between the region D3 and the region D2) is aligned with the peripheral edge of the antireflection portion 3. ing. According to this positional relationship, since the corners of the bent portion 52 and the inclined portion 51 are located directly below the peripheral end of the antireflection portion 3, the end surface of the antireflection portion 3 watermarks the translucent plate 2. It can be suppressed more favorably in a line shape.

  Further, when viewed from the thickness direction of the instrument 100, the front-side end of the bezel 7 is positioned closer to the center of the display unit 1 than the peripheral end of the antireflection unit 3. That is, the front end (tip) of the bezel 7 is located on the region D2 side with respect to the boundary between the region D3 and the region D2. In this way, even when the display unit 1 is viewed from a slight angle, the end face of the anti-reflection unit 3 becomes inconspicuous, so that it is possible to more effectively suppress the deterioration in appearance. Note that the front side end of the bezel 7 may be exactly coincident with the peripheral end of the antireflection portion 3.

  In addition, it is preferable that the uneven | corrugated layer 31 has hydrophilicity so that anti-fogging performance may be ensured together with anti-reflection performance by the moth-eye structure. Then, water formed by aggregation of moisture existing in the meter 100 is formed on the back surface of the translucent plate 2 due to the synergistic effect of the wettability due to the hydrophilic resin and the moth-eye structure. In addition, it is not possible to form fine water droplets with a particle size (several μm to several tens μm) that diffusely reflect light, and it is possible to prevent the contact angle from being held in an acute state, and to be visually recognized as white as cloudy. This is because it can be prevented. As a result, it is also possible to obtain a dustproof effect that does not require application of an antifogging agent. In order to realize such dustproof performance, for example, the uneven layer 31 is made of a material containing a hydrophilic polymer (protein, polyesteramide, etc.) in a UV curable resin, or a photocatalyst exhibiting hydrophilicity when irradiated with UV. What is necessary is just to comprise from the material etc. which used (titanium oxide).

(About the front of the display plate and ring-shaped member)
The display board 11 is a plate-like member in which an indicator portion 11a including a main scale portion 11a1, a first sub scale portion 11a2, a second sub scale portion 11a3, and a character portion 11a4 is formed. The display surface (front surface) of the display plate 11 has a circular central region (an example of a first region) E1 centering on the rotation center (rotating shaft 14a) of the pointer 10, and a ring shape surrounding the outer periphery of the central region E1. Region (an example of the second region) E2. A part of the character part 11a4 is formed in the central area E1, and a part of the main scale part 11a1, the first sub scale part 11a2, the second sub scale part 11a3 and the character part 11a4 is formed in the ring-shaped area E2. Is formed. The display board 11 has a through hole HL through which a base portion of the pointer 10 passes in a central portion.

  The main scale part 11a1 consists of a plurality of scales arranged so as to show a predetermined value. Specifically, the main scale portion 11a1 of the meter 100 is 10 scales indicating numerical values of −100 kPa, −80 kPa, −60 kPa, −40 kPa, −20 kPa, 0 kPa, +50 kPa, +100 kPa, +150 kPa, and +200 kPa. The main scale portion 11a1 has a minimum scale position at the 6 o'clock position of the clock scale position, and a maximum scale position at the 3 o'clock position of the clock scale position, and has an arc of about 270 ° centered on the rotation center of the pointer 10. As shown, the negative (negative pressure) side is arranged on the display board 11 in an unequal layout in which the interval is narrower and the positive (positive pressure) side is wider than the negative side.

  The 1st sub scale part 11a2 consists of several scales arrange | positioned inside each scale of the main scale part 11a1, and is formed shorter than each scale of the main scale part 11a1. Specifically, each of the scales of the first sub scale part 11a2 is arranged between the scales of the main scale part 11a1, one on the minus side, and four on the plus side, that is, every 10 kPa. Has been.

  The 2nd sub scale part 11a3 consists of several scales arrange | positioned on the outer side between each scale of the main scale part 11a1, and is formed shorter than each scale of the main scale part 11a1. Specifically, each of the scales of the second sub-scale part 11a3 is 7 pieces on the minus side between the scales of the main scale part 11a1, and 19 pieces on the plus side, that is, every 2.5 kPa. Is arranged.

  The character portion 11a4 is made up of numbers representing (a part of) the numerical values indicated by the main scale portion 11a1 and characters representing the type and display unit of the instrument 100. Specifically, the character part 11a4 of the meter 100 is “0.8”, “0.6”, “0.4”, “0.2”, “0”, which represents the numerical value indicated by the main scale part 11a1. The numbers “0.5”, “1.0”, “1.5” and “2.0”, the characters “TURBO” indicating the type of the meter 100, and the numbers “× 100 kPa” indicating the display unit And letters.

  4 is an enlarged cross-sectional view showing the display plate 11, FIG. 4 (a) is a cross-sectional view taken along line AA in FIG. 1, and FIG. 4 (b) is a cross-sectional view taken along line FF in FIG. It is. The display board 11 is located on the back side of the pointer 10. The display board 11 has a convex portion 11c provided at a location to be the main scale portion 11a1 and a first fine uneven portion provided at a location to be the central region E1 on the front surface (upper surface in FIG. 3) of the transparent substrate 11b. 11d and a portion and a ring that become a boundary portion (inner boundary portion) between the second fine uneven portion 11e provided at a portion that becomes the ring-shaped region E2 excluding the main scale portion 11a1 and the central region E1 of the ring-shaped region E2 And a smoothing portion 11f provided at a location that becomes a boundary portion (outer boundary portion) with an outer edge region E3 (not shown in FIG. 1) outside the ring-shaped region E2 of the ring-shaped region E2. Further, the display board 11 is provided on the back surface of the substrate 11b (the lower surface in FIG. 3) at the first ground color layer 11g provided at the location that becomes the central region E1 and the outer edge region E3, and at the location that becomes the ring-shaped region E2. And a second ground color layer 11h.

  The transparent substrate 11b is a plate-like or sheet-like member made of a transparent or colored light-transmitting material made of, for example, acrylic or polycarbonate resin. The substrate 11b is formed in a disk shape corresponding to the outer shape of the meter 100, for example, as shown in FIG.

  The convex portion 11c, the first fine uneven portion 11d, the second fine uneven portion 11e, and the smooth portion 11f are constituted by, for example, an ultraviolet curable resin layer 11i and are, for example, molded. In the case of molding, first, a mold in which shapes (concave portions, fine irregularities, and flat portions) corresponding to the convex portions 11c, the first fine irregularities 11d, the second fine irregularities 11e, and the smooth portions 11f are formed. prepare. Next, the mold is filled with an ultraviolet curable resin to form an ultraviolet curable resin layer 11i. Next, the substrate 11b is disposed on the surface of the ultraviolet curable resin layer 11i opposite to the mold side. Next, the ultraviolet curable resin layer 11i is cured by irradiating ultraviolet rays from the substrate 11b side. Next, the ultraviolet curable resin layer 11i and the substrate 11b are peeled from the mold. Thereby, the convex part 11c, the 1st fine uneven part 11d, the 2nd fine uneven part 11e, and the smooth part 11f can be obtained. The convex portion 11c, the first fine uneven portion 11d, the second fine uneven portion 11e, and the smooth portion 11f are formed by mold forming with a resin material, print forming with ink, or cutting the surface of the substrate 11b. May be. Moreover, although the height (fine degree) of the 1st, 2nd fine uneven | corrugated | grooved parts 11d and 11e is arbitrary, it is desirable to set it as the grade which a viewer cannot recognize that it is uneven | corrugated.

  As described above, the convex portion 11c is provided at a location that becomes the main scale portion 11a1 of the substrate 11b so as to protrude forward from the first and second fine concave and convex portions 11d and 11e. A translucent colored layer 11j is provided on the surface of the convex portion 11c by printing, hot stamping, or the like. An arbitrary color tone is selected for the colored layer 11j. For example, white or silver with high brightness can enhance the visibility of the convex portion 11c even when the second light source 160 is not lit, and the second light source 160 is not lit with black or gunmetal having low brightness. Sometimes it is difficult to visually recognize the convex portion 11c. Moreover, the surface of the convex part 11c may be smoothed. Here, the smoothing process refers to a process of making the surface roughness of the convex portion 11c smaller than that at the time of formation (smoothing the surface). Specific means of the smoothing treatment includes printing formation of a colorless transparent layer and polishing treatment. By performing a smoothing process on the surface of the convex part 11c, the surface of the convex part 11c can be made into a state with high glossiness, and a three-dimensional effect can be emphasized more. Moreover, since the transparency of the convex part 11c can be raised, the brightness | luminance of transmitted illumination can be improved.

  As described above, the first fine concavo-convex portion 11d is provided at a location that becomes the central region E1 on the front surface of the substrate 11b. FIG. 5 is an enlarged view of a portion G of the display plate 11 in FIG. As shown in FIG. 5, the first fine uneven portion 11 d has a concentric pattern (hereinafter also referred to as a first pattern) centered on the rotation center of the pointer 10. The 1st pattern by the 1st fine uneven | corrugated | grooved part 11d is a metal tone pattern expressing the hairline formed in a metal plate.

  As described above, the second fine concavo-convex portion 11e is provided at a location to be the ring-shaped region E2 excluding the main scale portion 11a1 on the front surface of the substrate 11b. As shown in FIG. 5, the second fine uneven portion 11 e has a radial (Asahikari) pattern (hereinafter also referred to as a second pattern) centered on the rotation center of the pointer 10. The 2nd pattern by the 2nd fine uneven | corrugated | grooved part 11e is a metal tone pattern expressing the hairline formed in a metal plate. The second fine uneven portion 11e is formed to have a pattern different from the first pattern (concentric in this embodiment) formed by the first fine uneven portion 11d. Here, the “different pattern” means a pattern having at least different directions of fine irregularities.

  As described above, the smooth portion 11f is provided at a location that becomes a boundary portion with the central region E1 of the ring-shaped region E2 on the front surface of the substrate 11b and a location that becomes a boundary portion with the outer edge region E3 of the ring-shaped region E2. The smooth portion 11f is a portion of the ultraviolet curable resin layer 11i that is not provided with fine irregularities, and has a smaller surface roughness (smooth) and gloss than the first and second fine irregularities 11d, 11e. Part. In the present embodiment, the smoothing portion 11f is a plane. The smooth portion 11f may be provided at least at the boundary portion between the first fine concavo-convex portion 11d and the second fine concavo-convex portion 11e, and may be a portion that becomes a boundary portion between the central region E1 and the ring-shaped region E2. You may provide in the location used as the boundary part straddling the center area | region E1 and the ring-shaped area | region E2. Furthermore, the smooth part 11f may be an inclined surface or a curved surface, as long as it is a part other than a flat surface and is not provided with a fine uneven part.

  The first ground color layer 11g is formed by printing light-shielding ink having an arbitrary first color tone on the back surface of the substrate 11b. The first color tone of the first ground color layer 11g is, for example, black or gunmetal with low brightness. As described above, the first ground color layer 11g is provided at the location that becomes the central region E1 and the outer edge region E3 on the back surface of the substrate 11b. Further, the first ground color layer 11g has a first opening 11k corresponding to a portion to be the character portion 11a4. The first opening portion 11k is provided in a shape that forms the design of the character portion 11a4 when viewed from the front side, and the light L31 emitted from the light source L3 for the display board passes through the ultraviolet curable resin layer 11i from the first opening portion 11k. By passing and emitting from the front side of the display board 11, the character part 11a4 is transmitted and illuminated. In addition, you may form a translucent colored layer and a transparent layer in the 1st opening part 11k. In the central area E1, the first color tone of the first ground color layer 11g is visually recognized in a portion (background portion) other than the character portion 11a4.

  The second ground color layer 11h is formed by printing on the back surface of the substrate 11b with a light-shielding ink having a color tone different from that of the first ground color layer 11g. The second color tone of the second ground color layer 11h preferably has a lightness different from that of the first color tone of the first ground color layer 11g, and is, for example, silver having a high lightness. As described above, the second ground color layer 11h is provided at a location that becomes the ring-shaped region E2 on the back surface of the display panel 11. In addition, the second ground color layer 11h is formed with a second opening portion 11m corresponding to the location of the main scale portion 11a1, the first sub scale portion 11a2, the second sub scale portion 11a3, and the character portion 11a4. Has been. 11 m of 2nd opening parts are provided in the shape which makes the design of the main scale part 11a1, the 1st sub scale part 11a2, the 2nd sub scale part 11a3, and the character part 11a4 seeing from the front side, and for display boards The light L31 emitted from the light source L3 passes through the ultraviolet curable resin layer 11i from the second opening 11m and is emitted from the front side of the display plate 11, whereby the main scale portion 11a1, the first sub scale portion 11a2, and so on. The second sub-scale portion 11a3 and the character portion 11a4 are transmitted and illuminated. In addition, you may form a translucent colored layer and a transparent layer in the 2nd opening part 11m. Of the second opening 11m, the second opening 11m corresponding to the main scale portion 11a1 (the convex portion 11c) is smaller than the width of the convex portion 11c in the short direction of each scale of the main scale portion 11a1. The width is wide (see FIG. 4B), and the outline of the main scale portion 11a1 is brilliantly emphasized during transmitted illumination. Main portions other than the main scale portion 11a1, the first sub scale portion 11a2, the second sub scale portion 11a3, and the character portion 11a4 in the ring-shaped region E2 have the second color tone of the second ground color layer 11h. Visible.

According to such a structure of the display board 11, in the central area E1 of the display area of the display board 11, the first fine uneven portion 11d is formed on the front surface of the substrate 11b, and the first ground color layer 11g is formed on the back surface. It is formed. On the other hand, in the ring-shaped region E2, the second fine uneven portion 11e is formed on the front surface of the substrate 11b, and the second ground color layer 11h is formed on the back surface. Therefore, the central region E1 and the ring-shaped region E2 have different color tones and have different patterns of fine unevenness applied to the front surface. As a result, in addition to the change in color tone, the degree of reflection of external light irradiated on the front surface (how the surface shines) is also different, so the central region E1 that is the background portion and the ring-shaped region E2 that forms the ring-shaped design. , The texture change can be increased, and the three-dimensional effect of the ring-shaped design can be enhanced.
In the ring-shaped region E2, the first and second fine uneven portions are provided at the boundary portion where the smooth portion 11f including the first fine uneven portion 11e and the second fine uneven portion 11e is provided. 11d and 11e are different in the degree of reflection of external light, and the texture of the ring-shaped region E2 being chamfered (C-plane) can be obtained by the reflection of external light at the smooth portion 11f. Thereby, the three-dimensional effect of the ring-shaped design can be further enhanced. In addition, the smooth portion 11f makes it difficult to recognize the printing misalignment of the first and second ground color layers 11g and 11h, thereby improving the yield.
Further, in the ring-shaped region E2, a convex portion 11c forming a design of the main scale portion 11a1 is provided on the front surface of the substrate 11b. Thereby, since a three-dimensional change actually occurs on the front surface of the ring-shaped region E2, the three-dimensional effect of the ring-shaped design can be further enhanced.

  6 is a cross-sectional view taken along the line HH in FIG. The ring-shaped member 8 has a second ground color layer 11h of the display board 11 as a third ground color layer 8c on the surface of the base portion 8b made of a predetermined resin including the front portion 8a (the outer surface visible to the user). A light-shielding ink having the same color tone is formed by printing. Here, the third color tone of the third ground color layer 8c is, for example, silver like the second color tone of the second ground color layer 11h. Further, as shown in FIGS. 5 and 6, the front portion 8a of the ring-shaped member 8 has a third fine unevenness having a pattern similar to the second pattern formed by the second fine unevenness portion 11e of the display plate 11. A portion 8d is provided. The third fine concavo-convex portion 8d is constituted by, for example, an ultraviolet curable resin layer 8e, and is formed by molding, similarly to the second fine concavo-convex portion 11e described above. In addition, it may be formed by printing with ink or vapor deposition. The third fine uneven portion 8d has a radial (Asahikari) pattern centered on the rotation center of the pointer 10 so as to form a pattern similar to the second pattern formed by the second fine uneven portion 11e ( Hereinafter also referred to as the third pattern). Here, the “similar pattern” means a pattern in which at least the directions of fine irregularities are substantially the same (including the case where they are completely the same). In the example of this embodiment, if it is a radial pattern, it can be said that it is the same pattern as the second pattern.

  Since the front portion 8a of the ring-shaped member 8 has the same color tone and pattern as the ring-shaped region E2 provided outside the display plate 11, the display plate 11 (the ring-shaped region E2) and the ring-shaped member 8 can increase the sense of unity, and can suppress a decrease in the appearance of the entire instrument 100.

  The above operations and effects can be obtained by the following configuration.

The instrument 100 of the present embodiment includes a display unit 1 that displays a measurement amount,
A translucent plate 2 that is located on the front side of the display unit 1 and allows the display unit 1 to be seen through;
A ring-shaped member 8 having a front portion 8a that covers the front side end of the translucent plate 2;
An antireflection portion 3 provided on the surface of the light transmitting plate 2 on the display portion 1 side and having a plurality of conical protrusions 31a arranged at a pitch equal to or smaller than the wavelength of visible light,
In the display unit 1, a fine uneven portion (second fine uneven portion 11e) having a predetermined pattern is formed on the front surface of the translucent substrate 11b, and a ground color layer (first color tone) having a predetermined color tone is formed on the back surface of the substrate 11b. A display panel 11 formed with a second ground color layer 11h),
The ring-shaped member 8 has another ground color layer (third ground color layer 8c) having the same color tone as that of the ground color layer on the front portion 8a, and another fine pattern having the same pattern as the fine uneven portion. An uneven portion (third fine uneven portion 8d) is formed.

  Further, the display plate 11 includes a ring-shaped region E2 in which the fine irregularities forming the pattern are formed on the front surface of the substrate 11b, and the ground color layer having the color tone is formed on the back surface of the substrate 11b. .

  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.

(Modification)
In the present embodiment, a third ground color layer 8c (another ground color layer) having the same color tone as that of the second ground color layer 11h of the display board 11 is formed on the front portion 8a of the ring-shaped member 8, and the display board. 11 and the second fine uneven portion 11e, and the third fine uneven portion 8d (another fine uneven portion) having a pattern similar to that of the second fine uneven portion 11e. One of the other fine irregularities may be formed at the front part of the ring-shaped member. Moreover, although the ring-shaped member 8 was made of resin, the ring-shaped member of the present invention may be made of metal. In this case, other fine irregularities may be formed directly on the base by surface processing such as polishing, or the base itself may also serve as another ground color layer.

  In the above, an example in which the display unit 1 is configured by a pointer-type display unit has been described. However, if the display unit 1 that is visually recognized through the light-transmitting plate 2 includes a display plate, an image showing a measurement amount is displayed. It may be an image display unit that displays. The image display unit includes, for example, a liquid crystal display (LCD), an organic EL (Electro-Luminescence) display, and the like, and the display board is disposed so as to surround the screen of these displays. In addition, the display of the measurement amount by the image display unit is not only a mode in which the measurement value is specifically displayed with numbers and characters, but also a mode in which the measurement amount is contrasted and read by the user by displaying a bar graph or a pointer image. Including.

  Moreover, the shape of the translucent plate 2 and the antireflection part 3 is not limited to a circular shape. It may be oval, rectangular, polygonal or the like. Accordingly, the shape of the ring-shaped member of the present invention is not limited to a circular shape.

  The vehicle on which the instrument 100 is mounted is not limited to a vehicle (including an automobile, a motorcycle, and the like). It may be mounted on other vehicles such as agricultural machinery, ships, aircraft, snowmobiles, jet skis. The instrument 100 may be, for example, an outdoor barometer, or may not be mounted on a vehicle.

  In the above description, in order to facilitate understanding of the present invention, descriptions of known technical matters are omitted as appropriate.

  The present invention is suitable for an instrument, and more specifically, an instrument equipped with an antireflection portion having a fine conical protrusion.

DESCRIPTION OF SYMBOLS 100 ... Instrument 1 ... Display part, 11 ... Display board, 11b ... Board | substrate, 11e ... Second fine uneven part, 11h ... Second ground color layer 2 ... Translucent board, 2a ... End part 3 ... Antireflection part, DESCRIPTION OF SYMBOLS 30 ... Base material, 31 ... Uneven layer, 31a ... Conical protrusion 4 ... Case 5 ... Lookback member 6 ... Packing 7 ... Bezel 8 ... Ring-shaped member, 8a ... Front part, 8c ... Third ground color layer (others Ground color layer), 8d ... third fine irregularities (other fine irregularities)
9 ... clamping part

Claims (2)

A display for displaying the measured amount;
A translucent plate that is located on the front side of the display unit and visually recognizes the display unit;
A ring-shaped member having a front portion covering the front side end portion of the translucent plate;
An antireflection portion provided on a surface of the light transmitting plate on the display portion side and having a plurality of conical protrusions arranged at a pitch equal to or less than a wavelength of visible light;
The display unit has a display plate in which a fine uneven portion having a predetermined pattern is formed on the front surface of a light-transmitting substrate, and a ground color layer having a predetermined color tone is formed on the back surface of the substrate,
The ring-shaped member is formed with another ground color layer having the same color tone as the ground color layer and / or other fine uneven portions having a pattern similar to the fine uneven portion on the front portion. ,
Instrument characterized by that. The display panel includes a ring-shaped region in which the fine uneven portion forming the pattern is formed on the front surface of the substrate, and the ground color layer having the color tone is formed on the back surface of the substrate.
The instrument according to claim 1.

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