JP5627481B2 - Pointer member, pointer unit, and pointer instrument - Google Patents

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. 6, includes a dial 902, a self-luminous 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. 6) is provided in the pointer portion 950 near the upper end 941a of the base body 941.

  The hollow reflecting portion 960 is formed in a substantially 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. 7A, 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. 7A) and the light. The other part L3 of L is transmitted to the transmission surface 963 side. 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. 7A) and the other part of the light L. L3 is transmitted to the transmission surface 963 side.

  The light L1 travels in the pointing portion 951 in the pointing direction S1 and exits from the upper surface 953 on the pointing portion 951 side, and the light L2 travels in the rear portion 952 in the rear end direction S2 and the rear portion. The light L3 is emitted from the upper surface 953 on the 952 side, and the light L3 enters the transmission surface 963 and then emerges from the upper surface 953 above the hollow reflective portion 960, whereby the entire upper surface 953 of the pointer portion 950 emits light. In FIG. 7A, the arrow indicating the light L3 represents the luminance of the light with a thickness. The thicker the luminance, the lower the luminance.

  As shown in FIG. 7B, the light L3 incident on the transmission surface 963 has the highest luminance at the location 963c of the transmission surface 963 directly above the corner 960a, and the indication direction S1 from the location 963c. The luminance gradually decreases with increasing distance from the transmission surface end 963a on the side or the transmission surface end 963b on the rear end direction S2 side. In addition, since the indication portion 951 is longer than the rear portion 952, the pointer portion 950 needs to reflect more light toward the indication direction S1. Therefore, the indication direction reflection surface 961 becomes the rear end direction reflection surface 962. The corner portion 960a is formed larger than the axis P of the pointer shaft 914 and closer to the rear end direction S2.

  As a result, the portion 963c having the highest luminance is also closer to the rear end direction S2, so that the light entering the vicinity of the transmission surface end 963b relatively close to the portion 963c can secure the necessary luminance, but is compared from the portion 963c. The light entering the vicinity of the end 963a that is far away from the target has insufficient luminance, and a dark portion D is generated near the end in the indicated direction S1 side at the location R of the upper surface 953 above the hollow reflector 960. Therefore, as shown in FIG. 8, a light diffusing component 970 formed in substantially the same shape as the hollow reflecting portion 960 made of a synthetic resin containing a diffusing agent that transmits and scatters light is inserted into the hollow reflecting portion 960. Or, similarly to the light emission pointer disclosed in Patent Document 1, a filter member is provided on the transmission surface 963 to prevent the occurrence of the dark portion D.

Japanese Utility Model Publication No. 6-12995

  However, as described above, if a light diffusing component, a filter member, or the like is provided in order to prevent the dark portion D generated at the location R above the hollow reflective portion 960 on the upper surface 953 of the pointer portion 950, the number of components increases and the number of man-hours for assembly increases There is a problem that the manufacturing cost of the pointer member increases.

  The present invention aims to solve the above problems. That is, an object of the present invention is to provide an inexpensive pointer member that can prevent a dark portion generated above a reflecting portion, a pointer unit having the pointer member, and a pointer instrument having the pointer unit.

  In order to achieve the above-mentioned object, the invention described in claim 1 is extended to a base portion that receives light from a light source, and to a pointing direction and a rear end direction opposite to the pointing direction from one end of the base portion. A translucent material having a pointer portion and a reflecting portion provided on the pointer portion so as to be opposed to the base portion so as to reflect light received by the base portion in the pointing direction and the rear end direction. In the pointer member, the reflection portion is configured by a plurality of partial reflection portions arranged in parallel in the width direction of the pointer portion, and each of the plurality of partial reflection portions receives a part of light received by the base portion. A pointing direction reflecting surface formed so as to reflect in the pointing direction and transmit another part of the light, and a part of the light received by the base connected to intersect the pointing direction reflecting surface And reflect the other part of the light A rear end direction reflecting surface formed so as to pass, and a corner portion formed so as to intersect the indication direction reflecting surface and the rear end direction reflecting surface and facing the base portion, The pointer member is characterized in that each of the corner portions of the partial reflection portions adjacent to each other is arranged so as to be shifted in the indicated direction or the rear end direction.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the reflecting portion is formed symmetrically with respect to the center in the width direction of the pointer portion.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the first partial reflection portion and the second partial reflection in which the reflection portion is arranged in parallel in the width direction of the pointer portion. And the third partial reflection portion, and the corner portion of the first partial reflection portion and the corner portion of the third partial reflection portion are on the rear end direction side with respect to the center of the base portion. The corner portion of the second partial reflection portion is arranged in the same direction with respect to the corner portion of the first partial reflection portion and the corner portion of the third partial reflection portion. It is characterized by being arranged relatively shifted from each other.

  In order to achieve the above object, a fourth aspect of the present invention covers the pointer member according to any one of the first to third aspects and the pointer portion of the pointer member and is opposite to the base side. And a cover member provided with a slit through which light from the upper surface of the pointer portion is directed.

  In order to achieve the above object, a fifth aspect of the present invention is directed to the pointer unit according to the fourth aspect, and a driving 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 reflecting portion provided in the pointer portion of the pointer member is formed by the pointing direction reflecting surface, the rear end direction reflecting surface, and the pointing direction reflecting surface and the rear end direction reflecting surface intersecting each other. And a plurality of partial reflection portions having at least a corner portion opposed to the base portion, and the respective corner portions of the partial reflection portions adjacent to each other are shifted in the indicated direction or the rear end direction. Since the corners where the brightness of the light transmitted through the pointing direction reflection surface or the rear end direction reflection surface is increased are distributed in the pointing direction and the rear end direction without being biased to one place, Even if the corners of some of the partial reflection portions are arranged closer to the rear end direction in order to reflect more light toward the indication direction, the corners of the other partial reflection portions are in the indication direction. The corners of the area above the reflector A dark portion that is arranged near the end portion on the indication direction side and the end portion on the rear end direction side, can ensure the luminance near the both end portions of the region, and is generated above the reflection portion without providing a light diffusion member or the like. Can be prevented at low cost.

  In addition, since the reflecting portion is formed symmetrically with respect to the center of the pointer portion in the width direction, luminance unevenness in the width direction 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. 1. (A) is the partial perspective view which looked at the pointer main body of the self-luminous 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, (c ) Is a partial perspective view of the pointer portion of the pointer main body as viewed from the upper surface side. (A) is a figure for demonstrating the light reflected and permeate | transmitted by the hollow reflection part of the pointer main body of FIG. 3, (b) is the upper surface of the pointer part located above a hollow reflection part. It is a figure which shows typically distribution of the brightness | luminance in an area | region. 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. (A) is a figure for demonstrating the light reflected and permeate | transmitted by the hollow reflection part of the pointer main body of the self-light-emitting pointer | guide of FIG. 6, (b) is the pointer located above a hollow reflection part. It is a figure which shows typically distribution of the brightness | luminance in the area | region of the upper surface of a part. It is a figure which shows the structure which provided the light-diffusion member in the hollow reflection part in the self-light-emitting pointer | guide of FIG.

  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 or 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. 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.

  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 includes a first partial reflection part 61, a second partial reflection part 62, and a third partial reflection part 63. The plurality of partial reflection portions 61, 62, 63 are arranged in the width direction of the pointer portion 50 (front-back direction in FIG. 3B), the first partial reflection portion 61, the second partial reflection portion 62, The three partial reflection parts 63 are arranged in parallel.

  The first partial reflection part 61 has a substantially planar pointing direction reflection surface 611, a rear end direction reflection surface 612, and a transmission surface 613, and is formed in a substantially triangular shape.

  The pointing direction reflecting surface 611 has one end closer to the lower side in the figure arranged in the vicinity of the base 40, and the axis of the pointer shaft 14 extends from the base 40 toward the pointing direction S1 (left direction in FIG. 3B). It is formed to be inclined so as to gradually leave in the direction of the center P (the upward direction in FIG. 3B). Thereby, the indication direction reflection surface 611 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 613 side.

  One end of the rear end direction reflection surface 612 is connected so as to intersect the one end of the indication direction reflection surface 611, and from the base portion 40 toward the rear end direction S2 (right direction in FIG. 3B) from this one end. The pointer shaft 14 is formed to be inclined so as to be gradually separated in the direction of the axis P (upward direction in FIG. 3B). That is, the rear end direction reflecting surface 612 intersects the indication direction reflecting surface 611 and is connected. Thereby, the rear end direction reflection surface 612 reflects a part L2 of the light L received by the light receiving unit 42 in the rear end direction S2, and transmits another part L3 of the light L to the transmission surface 613 side. .

  One end of the transmission surface 613 is connected to the other end of the pointing direction reflection surface 611 near the upper side in the figure, and the other end is connected to the other end of the rear direction reflection surface 612 near the upper side in the figure. That is, the transmission surface 613 is connected to each of the indication direction reflection surface 611 and the rear end direction reflection surface 612. The transmission surface 613 is disposed to face the upper surface 53 of the pointer portion 50. The transmission surface 613 and the upper surface 53 of the pointer portion 50 are substantially parallel to each other. Further, the center of the transmission surface 613 in the longitudinal direction (left-right direction in FIG. 3) is arranged on the axis P of the pointer shaft 14. Of course, the transmission surface 613 does not have to be substantially parallel to the upper surface 53, and the arrangement thereof is not limited to the case described above.

  The pointing direction reflection surface 611 is formed larger than the rear end direction reflection surface 612 (longer in the longitudinal direction of the pointer portion 50). Thereby, the corner 61a formed by the indication direction reflecting surface 611 and the rear end direction reflecting surface 612 intersecting with each other is disposed closer to the rear end direction S2 from the axis P of the pointer shaft 14.

  Similar to the first partial reflection unit 61, the second partial reflection unit 62 is formed in a substantially isosceles triangle shape including an instruction direction reflection surface 621, a rear end direction reflection surface 622, and a transmission surface 623. The pointing direction reflection surface 621 and the rear end direction reflection surface 622 of the second partial reflection portion 62 are formed to have the same size (length in the longitudinal direction of the pointer portion 50). The second partial reflection portion 62 is formed to be slightly smaller than the partial reflection portion 61 so that the entire second partial reflection portion 62 is accommodated in the outer shape of the first partial reflection portion 61 when viewed from the width direction of the pointer portion 50. ing. Further, a corner portion 62 a formed by intersecting the indication direction reflection surface 621 and the rear end direction reflection surface 622 is disposed on the axis P of the pointer shaft 14.

  The third partial reflection portion 63 has a substantially triangular shape including an instruction direction reflection portion 631, a rear end direction reflection surface 632, and a transmission surface 633, and is formed in the same shape as the first partial reflection portion 61. Further, the third partial reflection portion 63 is arranged so as to overlap with the partial reflection portion 61 when viewed from the width direction of the pointer portion 50.

  In the plurality of partial reflection portions 61, 62, 63, the respective corner portions 61a, 62a, 63a are arranged toward the light receiving portion 42 of the base portion 40, and as shown in FIG. The corner portion 61a of the first partial reflection portion 61 and the corner portion 63a of the third partial reflection portion 63 are shifted to the same position near the rear end direction S2 with respect to the axis P so as to overlap when viewed from the width direction. Are arranged. Further, the corner portion 62a of the second partial reflection portion 62 is shifted in the pointing direction S1 relative to the corner portion 61a of the first partial reflection portion 61 and the corner portion 63a of the third partial reflection portion 63. Are arranged on the axis P.

  Further, the hollow reflecting portion 60 is divided into one portion (front portion on the paper surface) divided with the surface including the center in the width direction of the pointer portion 50 (a surface parallel to the paper surface direction in FIG. 3B) as a boundary surface. The other part (the back part of the paper) is formed to have the same shape, that is, the hollow reflecting part 60 is formed symmetrically with respect to the center of the pointer part 50 in the width direction. Moreover, the thickness (namely, the magnitude | size of the width direction of the pointer part 50) of the some partial reflection parts 61, 62, and 63 is each formed in the same.

  The hollow reflection part 60 and the plurality of partial reflection parts 61, 62, 63 are not limited to the shape and arrangement described above. For example, (1) the hollow reflection part 60 is provided with four or more partial reflection parts. (2) In FIG. 3C, the corner portion 63a of the third partial reflection portion 63 is disposed so as to be shifted relative to the corner portion 62a of the second partial reflection portion 62 in the indicated direction S1. The respective corners 61a, 62a, 63a of the plurality of partial reflection portions 61, 62, 63 are all shifted in the pointing direction S1 or the rear end direction S2, or (3) the plurality of partial reflection portions 61, Each of 62 and 63 may be formed in different thicknesses, and unless the object of the present invention is contrary, the configuration of the hollow reflection portion and the plurality of partial reflection portions depends on the configuration of the pointer main body and the like. The shape and arrangement are determined as appropriate.

  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 FIGS. 4 (a) and 4 (b). 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 hollow reflecting portion 60 provided in the pointer portion 50 of the pointer main body 31 includes a first partial reflecting portion 61, a second partial reflecting portion 62, and a first partial reflecting portion 62 each formed in a substantially triangular shape. The three partial reflection portions 63 are arranged in parallel in the width direction of the pointer portion 50 in this order. In such a transmission surface 613 of the first partial reflection portion 61, the luminance of the portion of the transmission surface 613 immediately above the corner portion 61a is the highest. The same applies to the second partial reflection part 62 and the third partial reflection part 63.

  In the plurality of partial reflection portions 61, 62, and 63, the corner portion 61 a of the first partial reflection portion 61 and the corner portion 63 a of the third partial reflection portion 63 are rearward with respect to the axis P of the pointer shaft 14. The corner portion 62a of the second partial reflection portion 62 is disposed closer to the end direction S2 and is relatively relative to the corner portion 61a of the first partial reflection portion 61 and the corner portion 63a of the third partial reflection portion 63. Since the positions of the transmissive surfaces 613, 623, and 633 are high, the positions where the luminance is increased are dispersed in the instruction direction S1 and the rear end direction S2. Therefore, it is avoided that all the corners 61a, 62a, 63a are arranged far away from the end portions of the transmission surfaces 613, 623, 633 on the indication direction S1 side, and the transmission surfaces 613, 623, 633 are avoided. As shown schematically in FIG. 4 (a), light having high luminance and light having low luminance are adjacent to each other, and ends of the transmission surfaces 613, 623, 633 on the side of the indication direction S1 The brightness of the light L3 entering the vicinity of the portion and the vicinity of the end portion on the rear end direction side can be ensured.

  FIG. 4B shows the luminance distribution of the light L3 that enters each of the transmission surfaces 613, 623, and 633 viewed from the width direction of the pointer portion 50 at this time. A solid line is the luminance distribution of the present embodiment, and a broken line is the luminance distribution in the hollow reflecting portion having the conventional configuration described above. As shown in FIG. 4B, in this embodiment, the light L3 is shifted toward the pointing direction S1 as a whole as compared with the conventional case, and is incident on the end portion of each transmitting surface near the pointing direction S1. And the occurrence of the dark portion D in the region R can be prevented.

  In the present embodiment, the corners 61 a, 62 a, 63 a are arranged so as to be shifted, and the longitudinal centers of the transmission surfaces 613, 623, 633 are arranged on the axis P of the pointer shaft 14. And the corner portion 62a of the substantially isosceles triangular partial reflection portion 62 disposed at the center in the width direction of the pointer portion 50 is disposed on the axis P of the pointer shaft 14, so that the region The luminance at R changes approximately symmetrically about the axis P from the longitudinal center of the region R to both ends.

  As described above, according to the present invention, the hollow reflecting portion 60 provided in the pointer portion 50 of the pointer body 31 includes the pointing direction reflecting surface, the rear end direction reflecting surface, and the pointing direction reflecting surface and the rear end direction reflecting surface. And a plurality of partial reflection portions 61, 62, 63 having at least corner portions arranged to face the base portion, and each of the partial reflection portions adjacent to each other. Since the corner portions 61a, 62a, 63a are arranged so as to be shifted in the pointing direction S1 or the rear end direction S2, the corner portion 61a, in which the luminance of the light transmitted through the pointing direction reflecting surface or the rear end direction reflecting surface is increased, 62a and 63a are distributed in the pointing direction S1 and the rear end direction S2 without being biased to one place. Therefore, even when the corners 61a and 63a of some of the partial reflection portions 61 and 63 are arranged closer to the rear end direction S2 in order to reflect more light toward the indication direction S1, The corner portion 62a of the partial reflection portion 62 is arranged so as to be shifted toward the indication direction S1. Therefore, the corner portion 62a is disposed near the end of the region R above the hollow reflecting portion 60 on the pointing direction S1 side, and the corner portions 61a and 63a are located behind the region R above the hollow reflecting portion 60. It is arranged near the end on the end direction S2 side, the brightness near the both ends of the region R can be secured, and the dark part generated above the hollow reflective part 60 can be inexpensively provided without providing a light diffusing member or the like. Can be prevented.

  Further, since the hollow reflecting portion 60 is formed symmetrically with respect to the center in the width direction of the pointer portion 50, luminance unevenness in the width direction can be prevented.

  In the present embodiment, an expression indicating directions such as upper, lower, left, right, front, rear, etc. used for explaining the configuration and operation of each part of the display device 1 for the vehicle, the self-light emitting pointer 3 and the pointer main body 31. Is relative rather than absolute, and is appropriate when the vehicle display device 1, the self-luminous pointer 3 and the pointer body 31 or parts thereof are in the posture shown in the figure. Should change and be interpreted according to the change in posture.

  Further, the shapes of the partial reflection portions 61, 62, and 63 (the size of the instruction direction reflection surface, the rear end direction reflection surface and the transmission surface, the thickness, the positions of the corners, etc.) are not limited to the above-described configuration. For example, the partial reflection portion has a fan-like shape including a flat pointing direction reflection surface, a flat rear end direction reflection surface, and a curved transmission surface that is curved to protrude toward the upper surface side of the pointer portion. Alternatively, in the respective drawings of FIG. 3, the partial reflection portion is removed from the pointer portion 50 located above the hollow reflection portion 60, and the indication direction reflection surface and the rear end direction reflection surface of each partial reflection portion are obtained. It is extended upward and is formed so as to be continuous with the upper surface of the pointer portion 50 (that is, there is no transmission surface, and a V-shaped reflection portion opened upward including an instruction direction reflection surface and a rear end direction reflection surface). Etc., at least, the direction reflecting surface, the rear end reflecting surface, and , Corners and pointing direction reflecting surface and rear direction reflecting surface is formed to cross, as long as it has, unless contrary to the object of the present invention, they shape is arbitrary. In addition, the indication direction reflection surface, the rear end direction reflection surface, and the transmission surface are formed in a substantially flat surface. However, the present invention is not limited to this, and each of these surfaces is a flat surface, a curved surface, an aspheric surface, or a composite of them. It may be composed of a surface or a plurality of surfaces, and its shape is arbitrary as long as it is not contrary to the object of the present invention.

  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. 5, 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 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 41a Upper end of base body (one end of base)
42 Light-receiving part 50 Pointer part 51 Instruction part 52 Back part 53 Upper surface of the pointer part 54 Bottom face of the pointer part 60 Hollow reflective part (reflective part)
61, 62, 63 Partial reflection part 611, 621, 631 Pointed direction reflecting surface 612, 622, 632 Rear end direction reflecting surface 613, 623, 633 Transmitting surface 61a, 62a, 63a Pointed direction reflecting surface and rear end direction reflecting surface Corners formed by intersecting S1 Direction direction S2 Rear end direction

Claims (5)

A base that receives light from a light source; a pointer portion that extends from one end of the base in a pointing direction and a rear end direction that is opposite to the pointing direction; and light that is received by the base in the pointing direction and the In a pointer member made of a translucent material having a reflective portion provided on the pointer portion so as to face the base portion so as to reflect in the rear end direction,
The reflection part is composed of a plurality of partial reflection parts arranged in parallel in the width direction of the pointer part,
Each of the plurality of partial reflection portions 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,
The pointing direction reflecting surface and the rear end direction reflecting surface are formed so as to intersect with each other, and at least a corner portion disposed to face the base portion,
Each of the corner portions of the partial reflection portions adjacent to each other is arranged so as to be shifted in the indicated direction or the rear end direction.   The pointer member according to claim 1, wherein the reflecting portion is formed symmetrically with respect to a center in the width direction of the pointer portion. The reflection part is composed of a first partial reflection part, a second partial reflection part, and a third partial reflection part arranged in parallel in the width direction of the pointer part,
The corner portion of the first partial reflection portion and the corner portion of the third partial reflection portion are arranged so as to be shifted in the same direction toward the rear end direction with respect to the center of the base portion,
The corner portion of the second partial reflection portion is disposed so as to be relatively displaced in the indicated direction with respect to the corner portion of the first partial reflection portion and the corner portion of the third partial reflection portion. The pointer member according to claim 1 or 2, wherein the pointer member is provided.   The pointer member according to any one of claims 1 to 3, and a slit that covers the pointer portion of the pointer member and that allows light from the upper surface of the pointer portion to face the side opposite to the base side. And a cover member.   5. The pointer unit according to claim 4, a driving 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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