JP5912447B2 - Illumination structure of vehicle instrument device - Google Patents

Description

  The present invention relates to an illumination structure of a vehicular instrument device that can illuminate a dial plate evenly even with a single light source, and can solve the shortage of light quantity.

  In vehicles such as automobiles, an instrument device is attached to the front part of the passenger compartment. Such an instrument device includes an illumination structure for performing illumination at night or the like (see, for example, Patent Document 1).

  That is, as shown in FIG. 13, the instrument device 1 described above includes at least a circuit board 2, a dial 3 disposed on the surface side of the circuit board 2 in parallel with the circuit board 2, and the dial 3 and a pointer (not shown) provided so as to be rotatable along a pointer rotation region formed in the area 3.

  And the above-mentioned illumination structure 6 is arrange | positioned so as to oppose the light source 7 between the light source 7 attached to the position in the pointer | guide rotation area | region of the circuit board 2, and the circuit board 2 and the dial 3, Between the first reflecting portion 8 capable of reflecting the light from the light source 7 and the circuit board 2 and the dial plate 3, the first reflecting portion 8 is disposed so as to surround the pointer turning region, and reflected by the first reflecting portion 8. And a second reflecting portion 9 that reflects the emitted light toward the dial plate 3.

  The first reflecting portion 8 described above has a conical shape. The conical first reflecting portion 8 has a vertex on the circuit board 2 side, a base on the dial plate 3 side, and a straight or convex curved bus.

  According to such a configuration, light from the light source 7 attached at a position in the pointer rotation area of the circuit board 2 faces the light source 7 in a parallel space between the circuit board 2 and the dial 3. The light reflected by the first reflecting portion 8 arranged in this manner and reflected by the first reflecting portion 8 surrounds the pointer turning region in a parallel space between the circuit board 2 and the dial 3. Is reflected toward the dial plate 3 by the second reflecting portion 9 disposed in the position. Thereby, the dial plate 3 is indirectly illuminated. A part of the light from the light source 7 directly illuminates the dial 3.

  At this time, the direct light from the light source 7 mainly illuminates a portion around the first reflecting portion 8 in the dial plate 3, and the first reflecting portion 8 and the second reflecting portion 9 cause the illumination. The reflected light that is reflected illuminates almost the entire pointer turning area. In particular, the reflected light reflected in the vicinity of the apex of the first reflecting portion 8 having a conical shape mainly illuminates a portion near the first reflecting portion 8 in the dial plate 3 and the first reflecting having a conical shape. The reflected light reflected near the bottom of the portion 8 tends to illuminate a position (a position closer to the outer periphery of the pointer rotation region) away from the first reflecting portion 8 on the dial 3 mainly.

Japanese translation of PCT publication No. 2008-503381

  However, the illumination structure 6 of the vehicular instrument device 1 described in Patent Document 1 has the following problems.

  First, when the first reflecting portion 8 has a conical shape having a linear bus, it is difficult to illuminate the dial plate 3 without unevenness or to eliminate light loss.

  That is, for example, as shown in FIG. 14, when the apex angle of the first reflecting portion 8 is 90 degrees, the reflected light of the light irradiated near the bottom (upper part in the drawing) of the first reflecting portion 8. Is reflected toward the portion around the first reflecting portion 8 in the dial plate 3 or, as shown in FIG. 13, the reflected light of the light irradiated near the apex of the first reflecting portion 8 is Since the light is reflected by the second reflecting portion 9, reflected toward the periphery of the first reflecting portion 8 in the dial plate 3 and overlaps with direct light from the light source 7, the first reflecting portion 8 in the dial plate 3 The surrounding portion becomes brighter than the outer peripheral portion of the pointer rotation region, and uneven brightness occurs.

  Similarly, as shown in FIG. 15, when the apex angle of the first reflecting portion 8 is made smaller than 90 degrees, the base of the first reflecting portion 8 becomes small, and the ratio of the direct light from the light source 7 increases. Therefore, the brightness of the portion around the first reflecting portion 8 in the dial plate 3 is increased accordingly, and the above-described luminance unevenness is further increased.

  On the other hand, for example, as shown in FIG. 16, when the apex angle of the first reflecting portion 8 is increased to 120 degrees or the like, the reflected light from the first reflecting portion 8 is widely dispersed, Since the light is reflected (diffusely reflected) at different angles over the entire reflection portion 9, it becomes difficult for the second reflection portion 9 to reflect light toward the dial plate 3 without unevenness, resulting in uneven luminance and loss of light. Is likely to occur, and the design is complicated accordingly.

  Similarly, as in Patent Document 1, when the first reflecting portion 8 has a convex conical shape having a convex curve-shaped generatrix, the reflected light from the first reflecting portion 8 is more dispersed. In other words, since the diffuse reflection state is almost achieved, it becomes more difficult to cause the second reflecting portion 9 to reflect light toward the dial plate 3 without unevenness, and the design is further complicated.

In order to solve the above-described problems, the invention described in claim 1 is directed to a circuit board, a dial plate disposed on the surface side of the circuit board, and a pointer turning area provided on the dial plate. Tei Rutotomoni a pointer rotatably provided,
A first light source, which is disposed between the circuit board and the dial so as to face the light source and can reflect light from the light source, which is mounted at a position in the pointer rotation area of the circuit board. And a second reflection that is disposed between the circuit board and the dial so as to surround the pointer turning region and reflects the light reflected by the first reflecting portion toward the dial. in the illumination structure for a vehicle meter device and a part,
It said first reflecting portion, and have a reflective possible parallel reflective reflective surface toward the light from the light source to the dial plate in a direction parallel,
Together with the pointer on the surface side of the first reflecting portion are disposed, it characterized that you have the dial is disposed on a surface side of the finger needle.
According to a second aspect of the present invention, in the above, the reflecting surface for parallel reflection has a part of a parabola having a central axis parallel to the circuit board or the dial, passing through the light source and perpendicular to the dial. It is characterized by having a concave conical shape rotated around a rotating axis.
The invention described in claim 3 is characterized in that, in the above, at least an outer peripheral portion of the second reflecting portion is provided with a minute uneven portion for light diffusion.
According to a fourth aspect of the present invention, in the above, a mask portion that blocks light from the light source is provided at a central portion of the pointer turning region of the dial, and the light source is disposed inside the mask portion. And the first reflecting portion is arranged.
According to a fifth aspect of the present invention, there is provided a circuit board, a dial arranged on the surface side of the circuit board, and a pointer provided so as to be rotatable along a pointer rotation area provided on the dial. And with
A first light source, which is disposed between the circuit board and the dial so as to face the light source and can reflect light from the light source, which is mounted at a position in the pointer rotation area of the circuit board. And a second reflection that is disposed between the circuit board and the dial so as to surround the pointer turning region and reflects the light reflected by the first reflecting portion toward the dial. In an illumination structure of a vehicle instrument device comprising:
The first reflecting portion has a reflecting surface for parallel reflection capable of reflecting light from the light source in a direction parallel to the dial,
The first reflecting portion is disposed at a position partially overlapping with the pointer shaft hole, and a notch portion is provided in a portion overlapping with the pointer shaft hole of the first reflecting portion. To do.
The invention described in claim 6 is characterized in that, in the above, the pointer is arranged on the surface side of the first reflecting portion, and the dial is arranged on the surface side of the pointer. To do.
The invention described in claim 7 is characterized in that, in the above, the apex of the first reflecting portion coincides with the edge of the pointer shaft hole.

According to invention of Claim 1, the following effects can be acquired by the said structure. That is, since the first reflecting portion has a reflecting surface for parallel reflection, the light from the light source is reflected in a direction parallel to the dial, and more light reaches the peripheral portion of the pointer rotation region. be able to. Thereby, it is possible to solve the shortage of light quantity at the peripheral edge of the pointer rotation area. In addition, by using the first reflecting portion as a reflecting surface for parallel reflection, light from the light source reflected by the first reflecting portion is not irregularly reflected or dispersed unnecessarily. Can be efficiently reflected toward the second reflecting portion. In addition, since the light reflected by the first reflecting portion is directed in a direction parallel to the dial, the reflecting direction can be easily adjusted by the second reflecting portion, and the dial is illuminated uniformly. It becomes possible to obtain. In addition, it is possible to simplify the design by simplifying the shape of the second reflecting portion.
And while arrange | positioning a pointer | guide on the surface side of a 1st reflection part and arrange | positioning the dial on the surface side of a pointer | guide, at least the cover member for protecting a pointer | guide, and the frame member for supporting this cover member In this way, the instrument device can be made thinner and the number of parts can be reduced, and at the same time, it can have an innovative design that has never been seen before.

  According to invention of Claim 2, the following effects can be acquired by the said structure. That is, by using the first reflecting portion as the concave conical reflecting surface for parallel reflection, light from the light source can be reliably reflected in a direction parallel to the dial.

According to invention of Claim 3 , the following effects can be acquired by the said structure. That is, light is softly diffused by minute uneven portions provided on at least the outer peripheral portion of the second reflecting portion, thereby adjusting the light that illuminates the dial to eliminate unevenness in brightness or to reduce unevenness in brightness. Can be relaxed. In addition, it is possible to make it easier to see the silhouette of the pointer and to make it difficult to see the shadow of the pointer on the dial by diffusing light softly with a minute uneven part provided at least on the outer periphery of the second reflecting part. It becomes.

According to invention of Claim 4 , the following effects can be acquired by the said structure. That is, it is possible to prevent the central portion of the dial from being partially illuminated by the mask portion formed in the central portion of the dial rotation area of the dial blocking light from the light source. Since the light source and the first reflecting portion are arranged inside the mask portion, it is not necessary to arrange the light source and the first reflecting portion outside the pointer rotation region, and accordingly, the substrate on which the light source is mounted. Therefore, the entire instrument device can be reduced, the circuit board can be reduced in size, and the cost can be reduced. Further, by arranging the light source and the first reflecting portion inside the mask portion formed at the center portion of the pointer rotation region, the light source and the first reflecting portion are made invisible or difficult to see from the outside. Can be.

According to the fifth aspect of the present invention, the following operational effects can be obtained by the above configuration. That is, since the first reflecting portion has a reflecting surface for parallel reflection, the light from the light source is reflected in a direction parallel to the dial, and more light reaches the peripheral portion of the pointer rotation region. be able to. Thereby, it is possible to solve the shortage of light quantity at the peripheral edge of the pointer rotation area. In addition, by using the first reflecting portion as a reflecting surface for parallel reflection, light from the light source reflected by the first reflecting portion is not irregularly reflected or dispersed unnecessarily. Can be efficiently reflected toward the second reflecting portion. In addition, since the light reflected by the first reflecting portion is directed in a direction parallel to the dial, the reflecting direction can be easily adjusted by the second reflecting portion, and the dial is illuminated uniformly. It becomes possible to obtain. In addition, it is possible to simplify the design by simplifying the shape of the second reflecting portion.
Then, a part of the light from the light source, passed through a notch or pointer shaft holes may be used to illuminate the pointer. This makes it possible to illuminate both the dial and the pointer with the same light source at the same time.
According to invention of Claim 6, the following effects can be acquired by the said structure. That is, by arranging the pointer on the surface side of the first reflecting portion and arranging the dial on the surface side of the pointer, at least a cover member for protecting the pointer and a frame member for supporting the cover member In this way, the instrument device can be made thinner and the number of parts can be reduced, and at the same time, it can have an innovative design that has never been seen before.

  According to invention of Claim 7, the following effects can be acquired by the said structure. That is, by making the apex of the first reflecting portion coincide with the edge of the pointer shaft hole, a part of the light from the light source is efficiently guided to the pointer, and the dial is efficiently used by the remaining light. Can be illuminated. Thereby, the loss of light can be eliminated and the light quantity shortage can be prevented.

It is a perspective view of the illumination structure of the instrument device for vehicles concerning the Example of this invention. FIG. 2 is a partial front view of FIG. 1. FIG. 3 is a cross-sectional view of FIG. 2. It is a side view which shows the 1st reflection part of FIG. It is a side view which shows another example of the 1st reflection part of FIG. It is the elements on larger scale of FIG. It is a front view of the illumination structure of the instrument device for vehicles concerning the modification of this invention. FIG. 8 is a perspective view of FIG. 7. FIG. 8 is a side sectional view of FIG. 7. FIG. 8 is a side sectional view of the switch portion of FIG. 1 or FIG. 7. FIG. 11 is a side sectional view showing another example of FIG. 10. It is a side view which shows the 1st reflection part at the time of making the bus-line as a comparative example into circular arc shape. It is a side view which shows the illumination structure of the instrument device for vehicles concerning a prior art example. FIG. 14 is a side view similar to FIG. 13 when the apex angle of the first reflecting portion is 90 degrees. It is a side view similar to FIG. 13 at the time of making the apex angle of a 1st reflection part smaller than 90 degree | times. FIG. 14 is a side view similar to FIG. 13 when the apex angle of the first reflecting portion is 120 degrees.

  Hereinafter, examples embodying the present embodiment will be described in detail with reference to the drawings.

  FIGS. 1-11 shows this Example and its modification. FIG. 12 is a comparative example.

  <Configuration> The configuration will be described below.

  In vehicles such as automobiles, an instrument device is attached to the front part of the passenger compartment. Such an instrument device includes an illumination structure for performing illumination at night or the like.

  That is, as shown in FIGS. 1 to 3 (mainly refer to FIG. 3), the instrument device 21 described above includes at least a circuit board 22 and a dial plate 23 disposed on the surface side of the circuit board 22, A pointer 25 is provided so as to be rotatable along a pointer rotation region 24 formed on the dial plate 23.

  The illumination structure 26 described above is disposed between the light source 27 mounted at a position in the pointer rotation area 24 of the circuit board 22 and the circuit board 22 and the dial plate 23 so as to face the light source 27. The first reflecting portion 28 that can reflect the light from the light source 27 and the pointer rotating region 24 is disposed between the circuit board 22 and the dial plate 23 so as to surround the first reflecting portion 28. And a second reflecting portion 29 for reflecting the light reflected at the dial 23 toward the dial plate 23.

  Here, the above-described details will be described. The above-described instrument device 21 includes an instrument unit including a meter cover 31, the above-described circuit board 22, the lower housing 32, and the above-described dial plate 23 in order from the back side. It is said. These are each formed of a resin and have almost the same (planar) shape as that of the adjacent one, so that they are assembled by being overlapped or fitted in order with each other. It is configured to be integrated by a screw fixing portion or the like.

  As shown in FIG. 1, the instrument device 21 is an instrument unit obtained by unitizing a collective meter in which a plurality of instrument display units are combined. In this case, the instrument device 21 includes a speedometer, a tachometer, a fuel gauge, a water temperature gauge, and the like as an instrument display unit. The speedometer and the tachometer are analog. Further, the fuel gauge and the water temperature gauge are digitally displayed, and are displayed on the screen of the liquid crystal display device. In FIG. 1, the configuration of this embodiment is applied to an analog speedometer and tachometer. However, the configuration of the instrument display unit is not limited to this.

  As shown in FIG. 3, the meter cover 31 described above constitutes a main body of the instrument device 21.

  The circuit board 22 is a flat plate. The circuit board 22 is provided with an actuator 35 for rotating the pointer 25, various electronic components 36, a switch 37 (see FIG. 10) described later, the light source 27 described above, and the like. For the actuator 35 described above, for example, a cross coil type movement or a stepping motor is used.

  The lower housing 32 described above can cover and hide the circuit board 22. The lower housing 32 is made of, for example, a white resin so that the reflectance of light is high, and has a smooth surface so that light can be reflected more efficiently. The lower housing 32 is provided with a pointer shaft hole 32a through which the pointer shaft 35a extending from the actuator 35 is passed. The base portion (root portion) of the pointer 25 or the vicinity thereof is attached to the tip portion of the pointer shaft 35a.

  The dial 23 described above constitutes a display surface of an instrument display unit such as a speedometer or a tachometer. The dial plate 23 is made of a transparent resin plate. The dial plate 23 is usually arranged in parallel with the circuit board 22. However, it is not necessarily limited to parallel. The pointer turning region 24 described above is provided to the dial 23 so as to be circular or partially circular with the pointer shaft hole 32a as the center. A character scale portion indicated by the pointer 25 is formed on the outer periphery of the pointer rotation area 24. The character scale portion is composed of characters and scales, and is formed by printing on the dial plate 23, for example.

  On the other hand, in the illumination structure 26 described above, for example, an LED or the like is used as the light source 27. However, the light source 27 may be a bulb such as a light bulb. A plurality of light sources 27 or a plurality of light sources 27 may be provided. In this case, the light source 27 is a single light source for the purpose of reducing costs and simplifying the design.

  The first reflecting portion 28 and the second reflecting portion 29 described above are provided for the lower housing 32 described above.

  The first reflecting portion 28 is mainly for reflecting the light from the light source 27 so as to spread over the entire area of the pointer rotation region 24. The first reflecting portion 28 can have a hollow shape or a solid shape. For example, the first reflecting portion 28 is supported in a cantilevered state with respect to the tip of a support arm 32 b that integrally extends from the lower housing 32.

  As already described above, the second reflecting portion 29 is mainly for reflecting the light reflected by the first reflecting portion 28 toward the dial plate 23. The second reflecting portion 29 is a recess formed in the lower housing 32 so as to conform to the shape of the outer periphery of the pointer rotation region 24. However, depending on how the light source 27 is attached, the direct light from the light source 27 can be reflected toward the dial plate 23.

  In addition to the basic configuration as described above, the present embodiment has the following configuration. In the following, the overall views of FIGS. 1 to 3 are also referred to.

  (Configuration 1) As shown in FIG. 4, the first reflecting portion 28 has a parallel reflection reflecting surface 28 a that can reflect light from the light source 27 in a direction substantially parallel to the dial plate 23. It is said.

  As will be described later, the reflection surface 28a for parallel reflection includes not only a direction completely parallel to the dial plate 23 but also a surface that slightly expands in a parallel direction (so as not to impair the function). (See FIGS. 5 and 6).

  (Configuration 2) More specifically, the reflection surface 28a for parallel reflection rotates a part of the parabola 41 having a central axis parallel to the circuit board 22 or the dial plate 23 through the light source 27 and perpendicular to the dial plate 23. A concave conical shape rotated about the shaft 42 is used.

  Here, the concave conical reflecting surface 28a for parallel reflection (the first reflecting portion 28) has a vertex 28b facing the circuit board 22 and a base facing the dial 23 side.

  Further, the part of the parabola 41 is preferably the parabola 41 itself, but approximates the parabola 41 by combining a plurality of straight lines 41a, 41b, and 41c (see FIG. 6) as shown in FIGS. It is also possible to use a polygonal shape (approximate shape). In this case, the approximation is made with three straight lines 41a, 41b, and 41c, but the approximation may be made with two or four or more straight lines. In this case, as described above, the reflected light slightly spreads in the direction parallel to the dial plate 23. By doing in this way, it becomes possible to facilitate a design and manufacture, ensuring a substantial effect. It should be noted that even a slight expansion in the direction parallel to the dial plate 23 due to a manufacturing error or an assembly error is acceptable as long as the object of this embodiment can be achieved.

  (Configuration 3) As shown in FIG. 3, the pointer 25 is arranged on the surface side of the first reflecting portion 28. Then, the dial 23 is arranged on the surface side of the pointer 25.

  That is, the dial plate 23 is installed above the pointer 25. For this purpose, the pointer 25 is accommodated inside the second reflecting portion 29. Conversely, the second reflecting portion 29 is a recess having a depth that can accommodate the pointer 25.

  (Configuration 4) A minute uneven portion 44 for light diffusion is provided on at least the outer peripheral portion of the second reflecting portion 29.

  Here, the fine uneven portion 44 for light diffusion has a so-called texture pattern or the like. There are various sizes and patterns of the wrinkle pattern. Here, the wrinkle pattern has a general fineness used for light diffusion. In this case, the light diffusion is set to such a level that the light can be softly blurred or blurred.

  In addition, it is preferable to provide the light uneven concavo-convex portion 44 over the entire rotation range of the pointer 25. However, in order to provide a special effect visually, one of the rotation ranges of the pointer 25 is provided. It is also possible not to provide it for the portion or the inner peripheral portion.

  (Configuration 5) As shown in FIG. 2, a mask portion 45 that blocks light from the light source 27 is formed at the center of the pointer rotation region 24 of the dial plate 23. Then, the light source 27 and the first reflecting portion 28 are disposed inside the mask portion 45.

  Here, the mask portion 45 is configured not to transmit light, for example, by forming a light-shielding printing layer on the dial 23. However, in FIG. 2, for the convenience of drawing, only the outline is shown. The mask portion 45 is preferably a circular shape or a partial circular shape concentric with the pointer rotation region 24, but is not limited thereto, and may be a rectangular shape, a polygonal shape, or other shapes. it can.

  Further, the first reflecting portion 28 is formed at a position inside the edge portion of the mask portion 45 so that the first reflecting portion 28 cannot be easily seen from the lateral direction through the mask portion 45. In other words, the mask portion 45 is made larger than a circle whose radius is the distance from the pointer shaft 35a to the farthest position on the bottom surface of the first reflecting portion 28.

  The light source 27 is preferably provided at an intermediate point (intermediate position in the rotation direction) of the rotation range or in the vicinity thereof so that the entire rotation range of the pointer 25 can be illuminated uniformly.

  (Configuration 6) As a modification of the above, as shown in FIGS. 7 to 9, the first reflecting portion 28 is arranged at a position partially overlapping with the pointer shaft hole 32 a. Then, a notch is formed in a portion overlapping the pointer shaft hole 32a of the first reflecting portion 28.

  As described above, the first reflecting portion 28 has a crescent-shaped bottom surface in which an arc-shaped cutout portion is formed in a plan view. This notch constitutes a part of the peripheral wall of the pointer shaft hole 32a.

  Note that a light incident surface 25a is formed on the lower surface portion facing the light source 27 at the base portion facing the pointer shaft hole 32a of the above-described pointer 25, and the light incident on the upper surface portion from the incident surface 25a is received inside. A reflective surface 25 b that can be reflected toward the tip of the pointer 25 is formed. A pointer cap 25c is attached to the base portion of the pointer 25 so as to cover an attachment portion with respect to the pointer shaft 35a, the incident surface 25a, and the reflection surface 25b.

  In this modification, the dial plate 23 may be disposed above the pointer 25 or below the pointer 25. In this case, it is arranged below the pointer 25.

  (Configuration 7) In the case of the above configuration 6, preferably, the apex 28b of the first reflecting portion 28 is made to coincide with the edge of the pointer shaft hole 32a.

  (Configuration 8) Further, preferably, as shown in FIGS. 10 and 11, various electronic components 36 and pointers are provided on the circuit board 22 in order to reduce the thickness of the instrument device 21. An actuator 35 (see FIG. 3) for rotating 25, a switch 37, and the like are mounted on the surface on the meter cover 31 side (back surface mounting). Preferably, the light source 27 is accommodated in the hole formed in the circuit board 22. As a result, it is possible to eliminate uneven portions that block light on the surface side of the circuit board 22.

  Here, the above-described switch 37 is, for example, a reset switch for resetting a distance meter or the like. A switch knob 47 for operating the switch 37 is disposed through the through holes formed in the dial plate 23, the lower housing 32, and the circuit board 22, and to the surface side of the dial plate 23 via the elastic member 48. It is urged in the protruding direction. The switch knob 47 is formed with a flange portion 47a for preventing slipping that can be engaged with the through hole of the lower housing 32 from the back surface side, and the elastic member 48 described above is provided between the flange portion 47a and the circuit board 22. Is intervening. The elastic member 48 is a leaf spring formed in a mountain shape. However, the elastic member 48 may be a coil spring or the like. The lower housing 32 is integrally formed with a guide portion 32c for guiding the lifting and lowering of the flange portion 47a of the switch knob 47 or for pressing and holding the bottom edge portion of the elastic member 48. .

  Then, as shown in FIG. 10, the switch 37 mounted with the switch button 37 a facing downward on the back side of the circuit board 22 is pressed by the switch knob 47 via the seesaw-shaped pressing direction changing member 49. To be able to. Here, the seesaw-shaped pressing direction changing member 49 has a seesaw plate 49a extending between the switch 37 and the tip of the switch knob 47, and a swing center that pivotally supports an intermediate portion of the seesaw plate 49a so as to be pivotable up and down. The shaft portion 49 b and the support base portion 49 c that supports the swinging central shaft portion 49 b are attached to the meter cover 31. The swing center shaft portion 49b is parallel to the circuit board 22 and extends in a direction orthogonal to the extending direction of the seesaw plate 49a.

  Alternatively, as shown in FIG. 11, the switch 37 mounted on the back side of the circuit board 22 with the switch button 37 a facing sideways, the inclined surface portion 47 b formed at the tip of the switch knob 47, the side surface of the switch knob 47, etc. So that it can be pressed.

  <Operation> The operation of this embodiment will be described below.

  The light from the light source 27 attached at a position in the pointer rotation area 24 of the circuit board 22 is arranged in a (parallel) space between the circuit board 22 and the dial plate 23 so as to face the light source 27. The light reflected by the first reflecting portion 28 and the light reflected by the first reflecting portion 28 is arranged so as to surround the pointer rotation region 24 in the (parallel) space between the circuit board 22 and the dial plate 23. The second reflecting portion 29 is reflected toward the dial plate 23. Thereby, the dial plate 23 is indirectly illuminated. A part of the light from the light source 27 directly illuminates the dial plate 23.

  At this time, the direct light from the light source 27 mainly illuminates a portion around the first reflecting portion 28 in the dial plate 23, and is also provided by the first reflecting portion 28 and the second reflecting portion 29. The reflected light that has been reflected illuminates almost the entire pointer turning area 24.

  <Effect> According to this embodiment, the following effects can be obtained.

  (Effect 1) Since the first reflecting portion 28 has the reflecting surface 28a for parallel reflection, the light from the light source 27 is reflected in a direction parallel to the dial plate 23, and more light is reflected by the pointer turning region 24. It can be made to reach to the peripheral part. Thereby, it is possible to solve the shortage of light amount at the peripheral edge of the pointer rotation area 24.

  In addition, by making the first reflecting portion 28 a parallel reflection reflecting surface 28a, the light from the light source 27 reflected by the first reflecting portion 28 is not irregularly reflected or diffused wastefully. More light can be efficiently reflected toward the second reflecting portion 29. In addition, since the light reflected by the first reflecting portion 28 is directed in a direction parallel to the dial plate 23, the second reflecting portion 29 can easily adjust the reflection direction. It becomes possible to illuminate evenly. In addition, the shape of the second reflecting portion 29 can be simplified to facilitate the design.

  (Effect 2) By making the first reflecting portion 28 the concave conical reflecting surface 28a, the light from the light source 27 can be reliably reflected in the direction parallel to the dial plate 23. It becomes possible.

  On the other hand, as shown in FIG. 12 as a comparative example, when the first reflecting portion 28 has a concave conical shape in which an arc is rotated around the rotation shaft 42 described above, similar concave portions are formed. Even in the conical shape, the light from the light source 27 cannot be reflected well in the direction parallel to the dial plate 23, so that it is difficult to illuminate the dial plate 23 without unevenness as in the case of FIG. At the same time, loss of light occurs, which is not preferable.

  (Effect 3) Since the pointer 25 is arranged on the surface side of the first reflecting portion 28 and the dial plate 23 is arranged on the surface side of the pointer 25, at least a cover member for protecting the pointer 25 and this cover member By eliminating the frame member for supporting the instrument device, it is possible to reduce the thickness of the instrument device 21 and reduce the number of parts, and to provide a novel design that has never been achieved.

  (Effect 4) Light is softly diffused by the minute uneven portions 44 provided on at least the outer peripheral portion of the second reflecting portion 29, thereby adjusting the light that illuminates the dial plate 23 to eliminate unevenness in brightness, or It is possible to alleviate uneven brightness.

  Further, the light is softly diffused by the minute uneven portions 44 provided on at least the outer peripheral portion of the second reflecting portion 29, thereby making it easy to see the silhouette of the pointer 25 and making the shadow of the pointer 25 difficult to be reflected on the dial plate 23. It becomes possible to do.

  (Effect 5) It is possible to prevent the central portion of the dial plate 23 from being partially illuminated by the mask portion 45 formed in the central portion of the pointer rotation region 24 of the dial plate 23 blocking the light from the light source 27. it can.

  Since the light source 27 and the first reflecting portion 28 are arranged inside the mask portion 45, it is not necessary to arrange the light source 27 and the first reflecting portion 28 outside the pointer rotation region 24. Therefore, it is possible to reduce the size of the substrate on which the light source 27 is mounted, so that the entire instrument device 21 and the circuit substrate 22 can be reduced, and the cost can be reduced. It becomes. Further, by arranging the light source 27 and the first reflecting portion 28 inside the mask portion 45 formed at the center portion of the pointer rotating region 24, the light source 27 and the first reflecting portion 28 are not seen from the outside. Or can be difficult to see.

  (Effect 6) By partially overlapping the first reflecting portion 28 with the pointer shaft hole 32a, part of the light from the light source 27 passes through the notch or the pointer shaft hole 32a, and the pointer 25 is illuminated. Can be used for Thereby, it is possible to simultaneously illuminate both the dial 23 and the pointer 25 with the same light source 27.

  (Effect 7) By making the apex 28b of the first reflecting portion 28 coincide with the edge of the pointer shaft hole 32a, a part of the light from the light source 27 is efficiently guided to the pointer 25 and the rest The dial 23 can be efficiently illuminated with light. Thereby, the loss of light can be eliminated and the light quantity shortage can be prevented.

  That is, when the apex 28b of the first reflecting portion 28 is disposed outside the edge of the pointer shaft hole 32a, the reflected light from the portion from the apex 28b to the notch illuminates the pointer shaft 35a unnecessarily. As a result, light loss occurs. In addition, when the apex 28b of the first reflecting portion 28 is arranged outside the edge of the pointer shaft hole 32a, the periphery of the apex 28b of the first reflecting portion 28 is not cut away, The amount of reflected light toward the second reflecting portion 29 is reduced, resulting in insufficient light quantity.

  (Effect 8) Various electronic components 36, an actuator 35 for rotating the pointer 25 (see FIG. 3), a switch 37, and other components with respect to the circuit board 22 are provided on the surface on the meter cover 31 side. By mounting, it is possible to prevent these components from physically interfering with the first reflecting portion 28. Moreover, since the uneven part which interrupts | blocks light on the surface side of the circuit board 22 is lose | eliminated by the above, the reflected light from the 1st reflection part 28 can be prevented from being prevented. Therefore, the instrument device 21 can be thinned.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modifications are shown, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

21 (Vehicle) Instrument Device 22 Circuit Board 23 Dial 24 Pointer Rotating Area 25 Pointer 26 Illumination Structure 27 Light Source 28 First Reflecting Section 28a Parallel Reflecting Reflecting Surface 28b Vertex 29 Second Reflecting Section 41 Parabola 42 Rotating Shaft 44 Concavity and convexity 45 Mask part

Claims (7)

Tei Rutotomoni comprising: a circuit board, and a dial arranged on a surface side of the circuit board, and a pointer rotatably provided along the guidance pivot region provided in said dial,
A first light source, which is disposed between the circuit board and the dial so as to face the light source and can reflect light from the light source, which is mounted at a position in the pointer rotation area of the circuit board. And a second reflection that is disposed between the circuit board and the dial so as to surround the pointer turning region and reflects the light reflected by the first reflecting portion toward the dial. in the illumination structure for a vehicle meter device and a part,
It said first reflecting portion, and have a reflective possible parallel reflective reflective surface toward the light from the light source to the dial plate in a direction parallel,
Lighting structure of the with the pointer is disposed on the surface side of the first reflection portion, a vehicle meter device comprising that you have the dial is disposed on a surface side of the finger needle. The reflecting surface for parallel reflection has a concave conical shape in which a part of a parabola having a central axis parallel to the circuit board or the dial is rotated about a rotation axis that passes through the light source and is perpendicular to the dial. lighting structure of a vehicle meter device according to claim 1, characterized in that is. Lighting structure of the Second least the outer peripheral portion of the reflected portion of the vehicular instrument device according to claim 1 or claim 2, characterized in that fine irregularities of light diffusion are provided. A mask portion that blocks light from the light source is provided at the center of the pointer rotation area of the dial, and the light source and the first reflecting portion are disposed inside the mask portion . The lighting structure for a vehicular instrument device according to any one of claims 1 to 3. A circuit board, a dial disposed on the surface side of the circuit board, and a pointer provided to be rotatable along a pointer rotation area provided on the dial,
A first light source, which is disposed between the circuit board and the dial so as to face the light source and can reflect light from the light source, which is mounted at a position in the pointer rotation area of the circuit board. And a second reflection that is disposed between the circuit board and the dial so as to surround the pointer turning region and reflects the light reflected by the first reflecting portion toward the dial. In an illumination structure of a vehicle instrument device comprising:
The first reflecting portion has a reflecting surface for parallel reflection capable of reflecting light from the light source in a direction parallel to the dial,
The first reflecting portion is disposed at a position partially overlapping with the pointer shaft hole, and a notch portion is provided in a portion overlapping with the pointer shaft hole of the first reflecting portion. Illumination structure of a vehicle instrument device. The illumination of the vehicle instrument device according to claim 5 , wherein the pointer is arranged on the surface side of the first reflecting portion, and the dial is arranged on the surface side of the pointer. Construction. Lighting structure of a vehicle meter device according to claim 5 or claim 6, characterized in that the apex of the first reflective portion is coincident with the edge of the pointer shaft hole.