JP2012154796A - Pointer member, pointer unit, and pointer instrument - Google Patents

Abstract

An inexpensive pointer member that can prevent luminance unevenness without lowering the luminance of the upper surface of a pointer portion, a pointer unit having the pointer member, and a pointer instrument having the pointer unit.
A pointer portion 50 of a pointer main body 31 is provided with a hollow reflecting portion 60 having a pointing direction reflecting surface 61, a rear end direction reflecting surface 62, and a transmitting surface 63. Is provided with a notch portion 56 having a first reflecting surface 56a that reflects a part of the light L1 reflected by the pointing direction reflecting surface 61 toward a location R near the hollow reflecting portion 60 on the upper surface 531 of the pointing portion 51. It has been.
[Selection] Figure 3

Description

  The present invention relates to a pointer member made of a light-transmitting material that receives light from a light source, a pointer unit having the pointer member, and a pointer instrument having the pointer unit.

  In general, a vehicle is equipped with a vehicle display device that displays measurement values such as a vehicle speed and an engine speed, and in many vehicles, the vehicle display device includes a pointer instrument. The pointer instrument is equipped with a dial with a scale and indicators such as numbers, letters or symbols on the surface, a pointer unit that is placed on the front side of the dial and points to the indicator on the dial, and a pointer unit The meter case includes a driving device that rotates the pointer shaft according to the measurement amount, and a wiring board on which a circuit pattern, electronic components, and the like are provided and the driving device is fixed.

  And in order to make it easy to see the pointer unit provided in such a pointer instrument even in the dark, the pointer member constituting the pointer unit is formed of a light-transmitting synthetic resin as a light-transmitting material. Various techniques have been disclosed in which light from a light source is guided into a member to shine the pointer member. And the light emission pointer | guide shown in patent document 1 etc. has a hollow reflective part provided with the reflective surface which reflects a part of light from a light source toward the front-end | tip direction of a pointer | guide.

  For example, a pointer instrument 901, a part of which is shown in FIG. 8, includes a dial 902, a self-light emitting pointer 903 as a pointer unit, a driving device 904 including a pointer shaft 914 that is rotated according to a measurement amount, a wiring A plate 905 and a light source 906 are provided. The self-light emitting pointer 903 includes a pointer main body 931 as a pointer member having a base portion 940 and a pointer portion 950 integrally formed of a translucent synthetic resin, and covers the pointer main body 931 and an upper surface 953 of the pointer portion 950. And a cover member 932 provided with a slit for exposing toward the surface. The pointer main body 931 guides the light received by the base portion 940 to the pointer portion 950 and emits the light from the upper surface 953 of the pointer portion 950 toward the viewer, so that the upper surface 953 of the pointer portion 950 becomes the cover member 932. Light emission is visible through the slit.

  The base 940 of the pointer main body 931 includes a cylindrical base main body 941 attached to the tip of the pointer shaft 914 that also serves as a light guide member, a light receiving portion 942 that receives the light L of the light source 906 guided by the pointer shaft 914, Is provided. The pointer portion 950 of the pointer main body 931 is provided with a pointing portion 951 and a rear portion 952 that are extended from the base portion 940 in the pointing direction S1 that intersects the axis P of the pointer shaft 914 and in the opposite rear end direction S2, respectively. Further, a hollow reflecting portion 960 that penetrates the pointer portion 950 in the width direction (front-back direction in FIG. 8) is provided in the pointer portion 950 in the vicinity of the upper end 941a of the base body 941.

  The hollow reflecting portion 960 is formed in a substantially isosceles triangular shape including an instruction direction reflecting surface 961, a rear end direction reflecting surface 962, and a transmitting surface 963. Further, a corner portion 960 a formed by intersecting the indication direction reflection surface 961 and the rear end direction reflection surface 962 is disposed to face the light receiving portion 942 of the base portion 940. As shown in FIG. 9, the pointing direction reflecting surface 961 reflects a part L1 of the light L received by the light receiving unit 942 in the pointing direction S1 (left direction in FIG. 9) and another part of the light L. L3 is transmitted to the transmission surface 963 side. Further, the rear end direction reflecting surface 962 reflects a part L2 of the light L received by the light receiving unit 942 in the rear end direction S2 (right direction in FIG. 9) and transmits another part L3 of the light L. The light passes through the surface 963 side.

  The light L1 travels in the pointing portion 951 in the pointing direction S1 and exits from the upper surface 953a of the pointing portion 951, and the light L2 travels in the rear portion 952 in the rear end direction S2 and back. The light exits from the upper surface 953b.

  However, since the light L1 reflected by the pointing direction reflecting surface 961 travels at an angle with respect to the pointing direction reflecting surface 961, the amount of light traveling along the pointing direction reflecting surface 961 decreases, and therefore the pointing unit 951 There is a problem that the amount of light emitted from the portion R near the hollow reflective portion 960 of the upper surface 953a is reduced, a dark portion is generated in the portion R, and luminance unevenness is generated on the upper surface 953. Further, the light L2 reflected by the rear end direction reflection surface 962 has the same problem as the light L1. And the technique which solves such a problem is disclosed by patent document 2. FIG.

  The pointer member 811 of Patent Document 2 shown in FIG. 10 includes a base portion 811a, an instruction portion 811b1 extended in one direction from the base portion 811a, and a balance portion 811b2 as a rear portion extended in the other direction opposite to the one direction. And a pointer portion 811b including A hollow reflecting portion 811c that reflects light from the base portion 811a toward the distal end direction of the indicating portion 811b1 and the rear end direction of the balance portion 811b2 is provided at a connection portion between the indicating portion 811b1 and the balance portion 811b2. Yes.

  In addition, a back irregular reflection surface 811b3 is provided at the base portion between the base portion 811a and the balance portion 811b2. The rear irregular reflection surface 811b3 is disposed substantially parallel to the rear reflection surface 811c2 of the hollow reflection portion 811c so as to reflect the light reflected by the rear reflection surface 811c2 toward the upper surface of the balance portion 811b2. . For this reason, the above problem can be solved by adjusting the rear irregular reflection surface 811b3 and reflecting the light toward the portion near the hollow reflection portion 811c on the upper surface of the balance portion 811b2.

Japanese Utility Model Publication No. 6-12995 Japanese Patent Laid-Open No. 8-219820

  However, in order to reflect light toward the portion R near the hollow reflecting portion 960 of the upper surface 953a of the indicating portion 951 in the pointer main body 931 described above, a diffuse reflecting surface similar to the back diffuse reflecting surface 811b3 in FIG. 10 is thin, like the balance portion 811b2 in FIG. 10, the light cannot be sufficiently guided to the tip 951a of the indication portion 951. Therefore, the upper surface 953a of the indication portion 951 is not provided. There was a problem that the overall luminance was lowered.

  The present invention aims to solve the above problems. That is, the present invention aims to provide an inexpensive pointer member that can prevent luminance unevenness without lowering the luminance of the upper surface of the pointer portion, a pointer unit having the pointer member, and a pointer instrument having the pointer unit. It is said.

  In order to achieve the above object, a first aspect of the present invention provides a base that receives light from a light source, a pointing portion that extends from one end of the base in the pointing direction, and a rear end that is opposite to the pointing direction. A pointer portion having a rear portion extended in a direction, and a hollow shape provided in the pointer portion so as to face the base portion so as to reflect light received by the base portion in the pointing direction and the rear end direction. And a pointer member made of a translucent material having a reflecting portion, wherein the hollow reflecting portion reflects a part of the light received by the base in the indicated direction and transmits the other part of the light. A pointing direction reflecting surface formed so as to cross the pointing direction reflecting surface and reflecting a part of the light received by the base in the rear end direction and the other part of the light A rear-end-direction reflecting surface formed so as to transmit light, and A transmission surface that intersects and is connected to each of the surface and the rear-end-direction reflection surface, and is reflected by the indication-direction reflection surface on the bottom surface of the indication unit that is directed toward the base side The pointer member is characterized in that a notch portion provided with a top-surface-direction reflecting surface that reflects light toward a location near the hollow reflecting portion on the top surface of the pointing portion facing the bottom surface is provided.

  According to a second aspect of the present invention, in order to achieve the above object, the pointer member according to the first aspect and the upper surface of the pointer portion that covers the pointer portion of the pointer member and includes the upper surface of the pointing portion. And a cover member provided with a slit through which the light passes.

  In order to achieve the above object, a third aspect of the present invention is directed to the pointer unit according to the second aspect, and a drive device that rotates the pointer shaft to which the pointer unit is attached in accordance with the measurement amount. And a light source that emits light received by the pointer member of the pointer unit.

  According to the present invention, the pointer member is disposed on the bottom surface of the pointing unit directed toward the base side, and the light reflected by the pointing direction reflecting surface is close to the hollow reflecting unit on the top surface of the pointing unit facing the bottom surface of the pointing unit. Since there is a notch with a top-surface reflecting surface that reflects toward the location, the notch has a notch shape, so the indicator is reflected on the top-surface reflecting surface of the notch without making the indicator thin. The light reflected by the surface is reflected toward the upper surface of the indicating unit, and the amount of light emitted from the location can be increased, so that a dark portion can be prevented from occurring in the location, and uneven brightness on the upper surface of the pointer portion can be prevented. Can be prevented.

It is sectional drawing of the display apparatus for vehicles which is one Embodiment of the pointer instrument of this invention. FIG. 2 is an exploded three-dimensional view of a self-luminous pointer (pointer unit) included in the vehicle display device of FIG. (A) is the partial perspective view which looked at the pointer main body of the self-light-emitting pointer of FIG. 2 from the diagonal direction, (b) is the partial side view which looked at the pointer part of the pointer main body from the width direction. (A) is a figure which shows the structure (arc shape) of the 1st modification of the notch part provided in the pointer main body of FIG. 3, (b) is a structure (2nd) of the 2nd modification of a notch part ( (C) is a diagram showing a configuration of a third modified example of the notch (only both ends in the width direction), and (d) is a fourth modification of the notch. It is a figure which shows the structure (with a reflection layer) of an example. It is a figure which shows typically the light which advances the inside of the pointer part of the pointer main body of FIG. It is a figure which shows the structure of the modification of the pointer main body of FIG. It is a fragmentary sectional view which shows the structure of the modification of the self-light-emitting pointer | guide of FIG. It is a figure which shows the structure of the conventional pointer instrument and a self-light-emitting pointer. It is a figure which shows typically the light which advances the inside of the pointer part of the pointer main body of the self-light-emitting pointer of FIG. It is a figure which shows the structure of the pointer main body with which the other conventional self-light-emitting pointer is provided.

  Hereinafter, a display device for a vehicle which is an embodiment of a pointer instrument according to the present invention will be described with reference to FIGS.

  In FIG. 1, a vehicle display device 1 is a speed meter that displays a vehicle speed, for example, and is a character provided with a scale and an index such as a number, a character, or a symbol on a surface 2 a (a surface visually recognized by a viewer). A driving device 4 having a plate 2, a self-luminous pointer (hereinafter also referred to as a pointer) 3 as a pointer unit disposed on the surface 2 a of the dial 2, and a pointer shaft 14 to which the pointer 3 is attached at the tip; A circuit board 5 provided with a circuit pattern, electronic parts, and the like and a driving device 4 fixed, a plurality of light sources 6 provided on the circuit board 5, and from the center of the circuit board 5 toward the edge of the dial 2. The case 7 having the tapered portion 7 a formed as described above, the back cover 8 covering the back side of the wiring board 5, and the front glass 9 are provided.

  The dial plate 2 is a member formed in a substantially disc shape made of, for example, a transparent or translucent synthetic resin such as polycarbonate. A light-shielding ink (not shown) is printed on the surface 2a of the dial plate 2 respectively. In addition, a light-shielding region and an indicator as a translucent design formed by removing the light-shielding ink along the shape of characters, scales, etc. (without printing the light-shielding ink) are provided. Each index is visually recognized by being illuminated from the back side of the dial 2 by a light source 6 described later.

  The pointer 3 is arranged on the surface 2a side of the dial plate 2, and indicates the measurement amount in cooperation with each of the indicators by indicating each indicator provided on the dial plate 2. As shown in FIG. 2, the pointer 3 is provided in the cover member 32 to balance the pointer 3 by providing a pointer main body 31 as a pointer member, a cover member 32 made of an opaque synthetic resin covering the pointer main body 31. And a balance member 39 to be adjusted.

  As shown in FIGS. 3A and 3B, the pointer main body 31 is integrally formed with a base portion 40 using a light-transmitting synthetic resin as a light-transmitting material such as polycarbonate resin or acrylic resin. And a pointer portion 50.

  The base 40 includes a cylindrical base main body 41 and a light receiving portion 42 provided in the vicinity of the upper end 41 a inside the base main body 41. The base body 41 is fixedly attached to the pointer shaft 14 coaxially by inserting and fitting the tip of the pointer shaft 14 to the lower end 41b. That is, the center of the base body 41 coincides with the axis P of the pointer shaft 14. The light receiving part 42 is formed in the same circular shape and plane as the inside of the base body 41, and is spaced from the end surface 14 a at the tip of the pointer shaft 14 when the pointer shaft 14 is fitted to the base body 41. Are placed relative to each other. Of course, the shape of the light receiving unit 42 is not limited to a planar shape, and may be any shape that can receive light from a light source, such as a curved surface shape or a shape in which a plurality of surfaces are combined. In addition, the light receiving unit 42 may be disposed in close contact with the end surface 14 a of the pointer shaft 14.

  The pointer portion 50 is connected to the upper end 41a of the base main body 41 (that is, one end of the base portion 40), and is perpendicular to the axis P from the upper end 41a with the axis center P of the pointer shaft 14 as a boundary (substantially perpendicular). The indicator 51 extended in one direction intersecting (including the indication direction S1), and the rear portion extended shorter than the indication unit 51 in the other direction opposite to the one direction (ie, the rear end direction S2). 52. That is, the pointer portion 50 extends from the upper end 41a of the base body 41 in the instruction direction S1 and the rear end direction S2. The instruction direction S1 and the rear end direction S2 coincide with (including substantially coincide with) the radial direction of the pointer shaft 14. The instruction direction S1 and the rear end direction S2 are also the longitudinal direction of the pointer portion 50. Further, the pointer portion 50 is provided with a hollow reflection portion 60 as a reflection portion.

  The bottom surface 54, which is the surface of the pointer portion 50 directed toward the base portion 40, is formed by being colored white or silver by a hot stamp or the like so as to reflect light incident on the bottom surface 54 from within the pointer portion 50. The reflective layer 54a is provided so as to overlap. The reflective layer 54a is provided on the bottom surface 54 on the side of the instruction unit 51 so as to avoid a notch 56 described later. Alternatively, the reflective layer 54a may be provided only on the tip portion side (left side in FIG. 1) of the indicating portion 51 with respect to the notch portion 56 in the bottom surface 54. In addition, a diffusion layer 53a formed in a red color or the like with a hot stamp or the like is formed on the upper surface 53 which is the surface of the pointer portion 50 opposite to the bottom surface 54 so as to diffuse light emitted from the upper surface 53. Overlaid. In addition, the reflection layer 54 a and the diffusion layer 53 a may be formed by forming a texture or a fine prism structure on the bottom surface 54 and the top surface 53. In the present embodiment, the reflective layer 54a is provided only on the bottom surface 54 on the indication unit 51 side. However, a similar reflective layer 54a may be provided on the bottom surface 54 on the rear portion 51 side. In the following description, the description “bottom surface 54” represents the surface of the pointer portion 50 including the reflective layer 54 a on the base 40 side, and the description “top surface 53” refers to the diffusion layer opposite to the bottom surface 54. It represents the surface of the pointer portion 50 including 53a, and the bottom surface 54 and the reflective layer 54a, and the top surface 53 and the diffusion layer 53a will be described separately only when necessary. Note that the reflective layer 54a and the diffusion layer 53a may be provided with only one of them. Further, the upper surface 53 of the pointer portion 50 is divided into an upper surface 531 of the pointing portion 51 and an upper surface 532 of the rear portion 52 with the axis P of the pointer shaft 14 as a boundary. The bottom surface 54 of the pointer unit 50 is also the bottom surface of the instruction unit 51.

  As shown in FIGS. 3A and 3B, the hollow reflecting portion 60 is provided in the pointer portion 50 near the upper end 41 a of the base body 41 so as to face the light receiving portion 42 of the base portion 40. The hollow reflection part 60 has a pointing direction reflection surface 61, a rear end direction reflection surface 62, and a transmission surface 63, and penetrates the pointer part 50 in the width direction (front-back direction in FIG. 3B). It is formed in an equilateral triangular shape.

  The pointing direction reflecting surface 61 is formed in a flat shape, and one end closer to the lower side in the figure is arranged in the vicinity of the base 40, and from this one end toward the pointing direction S1 (left direction in FIG. 3B), It is formed so as to be gradually separated from the base portion 40 in the direction of the axis P of the pointer shaft 14 (upward direction in FIG. 3B). Thereby, the indication direction reflection surface 61 reflects a part L1 of the light L received by the light receiving unit 42 in the indication direction S1, and transmits another part L3 of the light L to the transmission surface 63 side.

  The rear end direction reflection surface 62 is formed in a flat shape, and one end is connected to the one end of the indication direction reflection surface 61, and the rear end direction reflection surface 62 is directed from the one end toward the rear end direction S2 (right direction in FIG. 3B). Therefore, it is formed so as to be gradually separated from the base portion 40 in the direction of the axis P of the pointer shaft 14 (upward in FIG. 3B). That is, the rear end direction reflection surface 62 is connected to intersect the indication direction reflection surface 61. Thereby, the rear end direction reflection surface 62 reflects a part L2 of the light L received by the light receiving unit 42 in the rear end direction S2, and transmits the other part L3 of the light L to the transmission surface 63 side. . Further, a corner portion 60 a formed by intersecting the indication direction reflection surface 61 and the rear end direction reflection surface 62 is disposed on the axis P of the pointer shaft 14 and toward the light receiving portion 42 of the base portion 40. . Of course, the arrangement of the corner portion 60a is not limited to the axis P of the pointer shaft 14, and may be shifted from the axis P toward the instruction direction S1 or the rear end direction S2.

  The transmission surface 63 is formed in a planar shape, and is disposed substantially parallel to the upper surface 53 of the pointer portion 50. One end is connected to the other end of the pointing direction reflecting surface 61 closer to the upper side in the drawing so as to cross the pointing direction reflecting surface 61, and the other end is connected to the other end of the rear end direction reflecting surface 62 closer to the upper side in the drawing. The direction reflection surface 62 is connected so as to intersect. In the transmission surface 63, the longitudinal center of the pointer portion 50 of the transmission surface 63 is disposed on the axis P of the pointer shaft 14. Of course, the transmission surface 63 may not be substantially parallel to the upper surface 53, and the arrangement thereof is not limited to the case described above.

  The notch 56 is provided in the vicinity of the base 40 on the bottom surface 54 of the pointer portion 50 (that is, the bottom surface of the indication portion 51), and the cross-sectional shape along the longitudinal direction of the pointer portion 50 is pointed at the top surface 531 of the indication portion 51. The bottom surface 54 is notched so as to have a wedge shape. Of course, the cross-sectional shape may be a shape other than the wedge shape, for example, a trapezoidal shape or a semicircular shape. Further, the notch 56 is linearly provided on the bottom surface 54 over the entire width direction of the pointer portion 50. In addition, the notch 56 is disposed immediately below the location R near the hollow reflecting portion 60 on the upper surface 531 of the indication unit 51. The cutout portion 56 includes a first reflection surface 56a provided on the rear end direction S2 side and a second reflection surface 56b provided on the instruction direction S1 side. The size and angle of the first reflecting surface 56a are set so that a part of the light L1 reflected by the pointing direction reflecting surface 61 is reflected toward the location R. The first reflection surface 56a corresponds to the upper surface direction reflection surface in the claims.

  In the present embodiment, the cutout portion 56 is formed by cutting the bottom surface 54 of the pointer portion 50 linearly over the entire width direction of the pointer portion 50 into a wedge shape, but is not limited thereto. Instead, for example, as shown in FIG. 4 (a), a wedge-shaped notch 56A formed in an arc shape convex in the pointing direction S1, and as shown in FIG. 4 (b), the width direction of the pointer portion 50 A wedge-shaped cutout portion 56B provided at the center portion of the needle portion, or a pair of wedge-shaped cutout portions 56C provided at both ends in the width direction of the pointer portion 50, as shown in FIG. As long as it has a reflection surface that reflects part of the light L1 reflected by the pointing direction reflection surface 61 toward the location R, the shape and the location of the reflection are arbitrary. Further, as shown in FIG. 4D, the bottom surface 54 is provided with a reflective layer 54a colored in white or silver by coating or the like, and the first reflective surface 56a and the second reflective surface of the notch 56 are overlapped. The surface 56b may have a configuration in which the reflective layer 54a is provided so as to overlap by painting or the like.

  The pointer main body 31 reflects and transmits the light received by the light receiving portion 42 of the base portion 40 through the hollow reflecting portion 60, guides the light in the pointer portion 50, and emits the light from the upper surface 53 of the pointer portion 50. Thereby, the upper surface 53 of the pointer portion 50 emits light, and the upper surface 53 is visually recognized through the slit 71 of the cover member 32.

  As shown in FIG. 2, the cover member 32 has an upper cover 33 and a lower cover 38 that are divided into upper and lower parts.

  The upper cover 33 includes a first cover portion 34 formed in a substantially rectangular tube shape that gradually decreases from the rear end 34b toward the tip end 34a in accordance with the outer shape of the pointer portion 50 of the pointer main body 31, and a base portion of the pointer main body 31. And a second cover part 35 formed in a circular dish shape covering the periphery of 40. The first cover portion 34 and the second cover portion 35 are opened downward in the figure, and the pointer portion 50 of the pointer main body 31 is accommodated inside from the opening.

  The upper wall 34c of the first cover part 34 is provided with a slit 71 extending from the rear end 34b to the front end 34a. The slit 71 is formed so that when the pointer main body 31 and the cover member 32 are assembled, the upper surface 53 of the pointer portion 50 of the pointer main body 31 is exposed in a straight line over the entire longitudinal direction thereof. That is, the slit 71 is formed along the longitudinal direction of the pointer portion 50. The length and width of the slit 71 can be arbitrarily designed according to the design of the pointer 3 and the like. Further, a translucent coloring member or a light diffusing member may be provided in the slit 71, and the slit 71 only needs to be configured so that light emitted from the upper surface of the pointer portion 50 passes therethrough. In addition, a pair of bosses (not shown) are formed on the inner surface of the second cover portion 35 so as to protrude downward in the figure and fit into the pair of fitting holes 38d of the lower cover 38. .

  The lower cover 38 includes a first lid 38 a having an annular plate shape formed in accordance with the opening shape of the second cover portion 35 of the upper cover 33, and the first cover 33 of the upper cover 33 that accommodates the instruction portion 51 of the pointer portion 50. A band-shaped second lid portion 38b extending in the radial direction from the first lid portion 38a, which is formed in accordance with the opening shape of the tip side portion of the one cover portion 34, and a pointer main body provided on the first lid portion 38a 31 through the base portion 40, a pair of fitting holes 38d provided in the first lid portion 38a corresponding to the pair of bosses of the upper cover 33, and a mounting boss to which the balance member 39 is attached. 38e. The lower cover 38 is assembled to the upper cover 33 to close the openings of the first cover portion 34 and the second cover portion 35, and forms a space for accommodating the pointer portion 50 of the pointer main body 31 together with the upper cover 33. And by accommodating the pointer part 50 of the pointer main body 31 in this accommodation space, it is possible to prevent the light emitted from the surface such as the bottom surface 54 of the pointer part 50 from illuminating the dial plate 2 or the like.

  The balance member 39 is formed with a weight set in consideration of the pointer portion 50 of the pointer main body 31, and has a fitting hole 39 a that is fitted to a mounting boss 38 e provided on the lower cover 38 of the cover member 32. Have. The balance member 39 is positioned by the mounting boss 38e and is accommodated in the cover member 32.

  The pointer 3 configured in this manner is assembled as follows, for example. First, the base 40 of the pointer main body 31 is passed through the through portion 38 c of the lower cover 38, the pointer main body 31 is set on the lower cover 38, and the balance member 39 is set on the lower cover 38. Then, the upper cover 33 is placed close to the pointer main body 31 so as to cover the pointer main body 31 from the upper surface 53 side of the pointer main body 31, and the pair of bosses and the lower cover 38 provided in the second cover of the upper cover 33 are covered. By fitting the pair of fitting holes 38d, the upper cover 33 and the lower cover 38 are fixed to each other, the pointer main body 31 is accommodated in the cover member 32, and the assembly is completed.

  The driving device 4 is a well-known stepping motor, and supports a pointer shaft 14 formed in a substantially cylindrical shape with a light-transmitting synthetic resin such as polycarbonate resin, and the pointer shaft 14 so as to be rotatable. A main body 15 that rotates the pointer shaft 14 according to the principle of a stepping motor in accordance with a speed measurement amount by a speed sensor that does not. A concave portion 15b is provided in a bottom surface 15a of a main body portion 15 disposed so as to overlap with a wiring board 5 described later, and an end surface 14b on the lower side of the pointer shaft 14 in the figure is exposed in the concave portion 15b. The base portion 40 of the pointer main body 31 described above is attached to the tip of the pointer shaft 14 at the upper side in the drawing. The pointer shaft 14 is configured to turn the pointer main body 31 and guide light to the base 40 as a light guide member.

  The wiring board 5 is a well-known printed circuit board provided with electronic components and wiring patterns for electrically connecting these electronic components. A driving device 4 and a plurality of light sources 6 are mounted on the surface of the wiring board 5 on the dial 2 side.

  The plurality of light sources 6 use LEDs, bulbs, and the like, and are controlled to be turned on and off by a control unit (not shown) provided on the wiring board 5. The plurality of light sources 6 emit light for causing the indicator of the dial 2 and the pointer main body 31 of the pointer 3 to emit light. One of the plurality of light sources 6 is disposed in the recess 15 b of the main body 15 of the driving device 4 so as to be opposed to the end surface 14 b of the pointer shaft 14. Thereby, the pointer shaft 14 guides the light incident on the end surface 14b from the light source 6 and emits the light from the end surface 14a at the tip.

  In the case 7, the tapered surface that is the surface of the tapered portion 7 a is a reflecting surface, and reflects the light emitted from the light source 6 toward the dial 2. Thereby, each index provided on the surface 2a of the dial 2 emits light. The back cover 8 is assembled to the case 7 so as to cover the back of the wiring board 5. The front glass 9 is disposed so as to cover the dial 2, the pointer 3 and the like, and is attached to the case 7 via a turn 10 by fixing means (not shown) such as a locking claw. The back cover 8 and the front glass 9 prevent dust and the like from entering the vehicle display device 1.

  Next, an example of the operation (action) of the pointer (self-luminous pointer) 3 according to the present invention having the above-described configuration will be described with reference to FIG. In each figure, the arrow described in the pointer main body 31 schematically shows the traveling direction of the light guided to the pointer main body 31.

  In the present embodiment, the pointer main body 31 is provided with a hollow reflecting portion 60 including an instruction direction reflecting surface 61, a rear end direction reflecting surface 62, and a transmitting surface 63. In addition, the pointer main body 31 is provided with a notch portion 56 formed by cutting the bottom surface 54 of the pointer portion 50 linearly over the entire width direction of the pointer portion 50 into a wedge shape. Since the cutout portion 56 has a cutout shape, the location of the indication portion 51 on the indication direction S1 side from the cutout portion 56 is not narrowed, and the size of the indication portion 51 is not affected. The first reflecting surface 56 a of the notch 56 reflects a part of the light L 1 reflected by the pointing direction reflecting surface 61 toward a location R near the hollow reflecting portion 60 on the upper surface 531 of the pointing portion 51. In addition, the size and angle are set.

  Then, as shown in FIG. 5, the pointing direction reflecting surface 61 reflects a part L1 of the light L received by the light receiving unit 42 in the pointing direction S1 (left direction in FIG. 5) and the other of the light. The portion L3 is transmitted to the transmission surface 63 side. The rear end direction reflection surface 62 reflects a part L2 of the light L received by the light receiving unit 42 in the rear end direction S2 (right direction in FIG. 5) and transmits another part L3 of the light to the transmission surface. Transmits to the 63 side. The light L1 travels in the pointing unit 51 in the pointing direction S1 and exits from the upper surface 531 of the pointing unit 51, and the light L2 travels in the rear part 52 in the trailing end direction S2 and back. The light is emitted from the upper surface 532 of the light source.

  When a part of the light L1 enters the first reflecting surface 56a of the notch 56, the light L1 is reflected toward the location R and is emitted from the location R. Thereby, the light quantity emitted from the location R of the upper surface 53 of the pointer part 50 can be increased, and it can prevent that a dark part arises in the location R.

  As described above, according to the present invention, the pointer main body 31 transmits the light reflected by the pointing direction reflecting surface 61 to the bottom surface of the pointer portion 50 (that is, the bottom surface of the pointing portion 51) directed toward the base portion 40 side. Since the notch 56 provided with the first reflecting surface 56a that reflects toward the portion R near the hollow reflecting portion 60 on the upper surface 531 of the indicating portion 51 facing the 54 is provided, the notch 56 has a notch shape. Therefore, without thinning the indication unit 51, a part of the light L reflected by the indication direction reflection surface 61 at the first reflection surface 56a of the notch 56 is reflected toward the upper surface 531 of the indication unit 51, and The amount of light emitted from the location R can be increased, so that a dark portion can be prevented from occurring in the location R, and luminance unevenness on the upper surface 53 of the pointer portion 50 can be prevented.

  In the above-described embodiment, the inside of the hollow reflecting portion 60 is a space. However, the present invention is not limited to this, and as shown in FIG. 6, a diffusing agent that transmits and scatters light into the hollow reflecting portion 60. You may provide the light-diffusion component 70 formed in the substantially the same shape as the hollow reflection part 60 using a synthetic resin containing. By doing so, the light L3 transmitted through the pointing direction reflecting surface 61 and the rear end direction reflecting surface 62 can be diffused, and uneven brightness on the upper surface 53 of the pointer portion 50 can be further prevented.

  In the present embodiment, the upper, lower, left, right, front, rear, etc. directions are used to explain the configuration and operation of each part of the vehicle display device 1, the self-luminous pointer 3 and the pointer main body 31. The expressions shown are relative rather than absolute, and are appropriate when the vehicle display device 1, the self-luminous pointer 3 and the pointer main body 31 or parts thereof are in the posture shown in the figure. When the posture changes, it should be interpreted according to the change in posture.

  Moreover, the shape of the hollow reflection part 60 is not limited to the above-described configuration. For example, the hollow reflection part includes a flat pointing direction reflection surface, a flat rear end direction reflection surface, and a pointer. The pointing direction reflection surface, the rear end direction reflection surface, and the transmission, such as a fan-like shape formed of a curved transmission surface that is curved toward the upper surface side of the part, or a polygonal shape other than a triangle As long as it has a surface and is formed hollow in the pointer portion, these shapes are arbitrary as long as the object of the present invention is not violated. Further, the shapes of the indication direction reflection surface 61, the rear end direction reflection surface 62, and the transmission surface 63 are not limited to the above-described configuration, and each of these surfaces may be a flat surface, a curved surface, an aspheric surface, or a composite surface thereof. Or it may be comprised by several surfaces, and the shape is arbitrary unless it is contrary to the objective of this invention.

  Similarly, the first reflecting surface 56a of the notch 56 may be configured by a flat surface, a curved surface, an aspheric surface, a composite surface thereof, or a plurality of surfaces. Further, the number of the notches 56 is not limited to one, such as a configuration in which the plurality of notches 56 are arranged in parallel along the instruction direction S1, and a plurality of notches 56 may be provided.

  In the present embodiment, the base 40 includes a base body 41 attached to the pointer shaft 14 and a light receiving portion 42 that receives the light of the light source 6 guided to the pointer shaft 14. However, the present invention is not limited to this. For example, as shown in FIG. 7, the lower cover 38 is provided with a cylindrical bearing portion 38f attached to the pointer shaft 14 in place of the base main body 41, and the base portion 40 of the pointer main body 31 is formed only by the light receiving portion 42. As long as the base portion of the pointer main body (pointer member) includes at least a light receiving portion that receives light from the light source, the configuration thereof is arbitrary.

  In the present embodiment, the display device for a vehicle as a speed meter has been described. However, the present invention is not limited to this. For example, the present invention is applied to an engine tachometer, a fuel gauge, and the like in addition to the speed meter. Or may be used for industrial instrument devices other than display devices for vehicles such as instruments used for measuring gas pressure, temperature, etc. in factories, etc. Uses and application devices are arbitrary.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

1 Vehicle display device (pointer instrument)
3 Self-luminous pointer (pointer unit)
4 Driving device 6 Light source 14 Pointer shaft 31 Pointer body (pointer member)
32 Cover member 40 Base 41 Base body 42 Light receiving portion 50 Pointer portion 51 Pointer portion 52 Back portion 53 Pointer portion upper surface 531 Pointer portion upper surface 532 Rear portion upper surface 54 Pointer portion bottom surface (pointer portion bottom surface)
56 Notch 56a 1st reflective surface (upper surface direction reflective surface)
Reference Signs List 60 hollow reflecting portion 61 pointing direction reflecting surface 62 rear end direction reflecting surface 63 transmitting surface 60a corner formed by intersecting the pointing direction reflecting surface and the rear end direction reflecting surface S1 pointing direction S2 trailing end direction

Claims (3)

A base part that receives light from a light source, an indicator part that extends from one end of the base part in a pointing direction, a pointer part that extends in a rear end direction opposite to the pointing direction, and a light receiving part by the base part In a pointer member made of a translucent material having a hollow reflecting portion provided in the pointer portion so as to be opposed to the base portion so as to reflect the emitted light in the indication direction and the rear end direction,
The hollow reflector is
A pointing direction reflecting surface formed so as to reflect a part of the light received by the base in the pointing direction and transmit another part of the light;
Rear end direction reflection formed so as to cross the indication direction reflection surface and to be configured to reflect a part of the light received at the base part toward the rear end and to transmit the other part of the light. Surface,
A transmission surface connected to intersect each of the indication direction reflection surface and the rear end direction reflection surface,
On the bottom surface of the pointing portion directed toward the base side, the light reflected by the pointing direction reflecting surface is reflected toward a location near the hollow reflecting portion on the top surface of the pointing portion facing the bottom surface. A pointer member provided with a notch provided with an upper surface direction reflecting surface.   The pointer member according to claim 1, and a cover member that covers a pointer portion of the pointer member and is provided with a slit through which light from the upper surface of the pointer portion including the upper surface of the pointing portion passes. Characteristic pointer unit.   The pointer unit according to claim 2, a drive device that rotates a pointer shaft to which the pointer unit is attached according to a measurement amount, and a light source that emits light received by a pointer member of the pointer unit. A pointer instrument characterized by that.

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