JP2009250888A - Indication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indication device capable of easily improving the appearance of a pointer indicated by light emission. <P>SOLUTION: The indication device includes: an emission surface part 25 on which light from a light source 5 is incident and which emits the light toward a pointer part 12 of the pointer 10 rotated at a front surface 3a of an indication panel 3; and an inclination surface part 26 on which the light from the light source 5 is incident and which reflects the light directed between the pointer part 12 and the indication panel 3 to illuminate a circular area about an output shaft 4a of a movement 4. A cylindrical light guide member 20 through which the output shaft 4a penetrates at the central shaft part is arranged between the light source 5 and a reflective part 14a formed at the pointer part 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device including a pointer that emits and displays light by a light source provided therein.

  Conventionally, there has been known a display device that emits light from a light source disposed on the back side of a display plate to illuminate a pointer indicating the indicator portion of the display plate disposed on the front side of the substrate, and displays the pointer by emitting light. (For example, refer to Patent Document 1).

  In this display device, the light source is disposed in the vicinity of the movement that rotates the pointer, and light from the light source is incident from a base that is the rotation center of the pointer. The incident light is reflected and reflected within the pointer, and the entire pointer is displayed as a light emission.

Here, in order to prevent the luminance unevenness of the pointer, it is considered that a reflection portion is formed that reflects light incident from the base portion of the pointer toward the tip portion.
JP 2007-271426 A

  By the way, in the above-described display device, the pointer itself is structured to emit light, and a complicated structure is required to emit light around the base, which is the center of rotation of the pointer, so that the appearance can be easily improved. I couldn't.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a display device that can easily improve the appearance of a pointer that displays light.

  In order to solve the above-mentioned problems, a display device according to the present invention comprises a substrate, a display plate disposed on the front side of the substrate and having an indicator portion formed thereon, and is rotatable by a movement and the indicator. A pointer that indicates a portion and a light source, the pointer extending in the same direction as the output shaft of the movement and penetrating the display plate, and the tip of the rotation shaft from the tip to the display plate A pointer portion extending along the base portion, and a reflection portion that is located at the base portion of the pointer portion and reflects the light emitted from the light source toward the tip portion of the pointer portion, and receives the light from the light source. The light exiting surface portion that emits the incident light toward the pointer portion, the light from the light source is incident, the light is reflected between the pointer portion and the display plate, and the output shaft is centered. And an inclined surface portion that illuminates the circular area, and A cylindrical light guide member in which the output shaft to the mandrel portion passes, is characterized in that disposed between the light source and the reflective portion.

  According to the present invention, between the light source and the reflecting portion, an emission surface portion that emits light from the light source toward the pointer, and the light is reflected between the pointer portion and the display plate to center the output shaft. A cylindrical light guide member having an inclined surface portion for illuminating the circular area is disposed.

  For this reason, the light reflected by the inclined surface portion can be illuminated so as to surround the pointer portion and the display board, that is, around the rotation center of the pointer, and change the appearance when the pointer is light-emitting displayed. Therefore, it is possible to easily improve the appearance.

  Further, since the light guide member reflects a part of the light from the light source by the inclined surface part and emits a part of the light toward the pointer by the emission surface part, the pointer, the pointer part and the display plate can be configured with a simple configuration. It is also possible to obtain a lighting effect that can emit light at the same time and raise the pointer by adjusting the brightness.

  The best mode for carrying out the display device according to the present invention will be described with reference to the drawings.

  A display device 1 shown in FIG. 1 is used for a vehicle speed meter or the like attached to an instrument panel of a vehicle, and includes a substrate 2, a display plate 3 disposed on the front side of the substrate 2, and a display plate 3. And a pointer 10 that is rotatable on the front surface 3a side.

  The substrate 2 is a printed circuit board (printed wiring board), and a movement 4 for rotating the pointer 10 is mounted on the back surface 2a side, a plurality of light sources 5 are mounted on the front surface 2b side, and an output shaft of the movement 4 A through hole 2c through which 4a passes is formed. Here, some of the light sources 5 are arranged in the vicinity of the through hole 2c.

  The display board 3 is formed of a colorless and transparent synthetic resin material. After printing a white light-transmitting paint (not shown) on the front surface 3a side, the display board 3 is not shown except for a portion serving as an index portion T (see FIG. 3). The shading paint is printed (white print). As a result, the indicator portion T is lit and displayed in white by the light transmitted through the display plate 3.

  Further, a reflecting member 6 is sandwiched between the substrate 2 and the display panel 3. The reflecting member 6 is concentric with the cylindrical portion 6a, the cylindrical portion 6a having both ends open, the first reflector 6c spreading outward from the base outer peripheral surface 6b of the cylindrical portion 6a, and the cylindrical portion 6a. And a second reflector 6d surrounding the cylindrical portion 6a.

  The output shaft 4a is inserted inside the cylindrical portion 6a, and a plurality of light sources 5,... Disposed in the vicinity of the output shaft 4a are disposed. A plurality of light sources 5,... Are also disposed between the first reflector 6c and the second reflector 6d.

  The pointer 10 is made of a colorless and transparent synthetic resin material, extends in the same direction as the output shaft 4a and is fixed to the output shaft 4a, and the display plate from the tip portion 11a of the rotational shaft 11. 3 and a pointer portion 12 extending along the line 3. Here, the tip end portion 11 a of the rotating shaft 11 passes through a shaft hole 3 b (see FIG. 2) formed in the display plate 3.

  The pointer portion 12 has a thin plate shape having a lower surface 13a extending in parallel with the display plate 3 and an upper surface 13b inclined so as to gradually approach the display plate 3 from the base portion 12a toward the distal end portion 12b.

  Further, the base portion 12a of the pointer portion 12 is formed with a gap 14 in which a later-described sun light preventing member 15 is mounted. Here, the gap 14 has a substantially trapezoidal shape in a side view, and a part of the surface surrounding the gap 14 is a reflecting portion 14a.

  The reflecting portion 14a reflects light emitted from the light source 5 toward the distal end portion 12b of the pointer portion 12, and gradually tilts toward the distal end portion 12b side from the lower surface 13a of the pointer portion 12 toward the upper surface 13b. ing. As a result, the light hitting the reflecting portion 14a is bent toward the tip portion 12b.

  Further, the sun light preventing member (opaque portion) 15 is made of a milky white opaque synthetic resin material and has a size that can be fitted into the gap 14. The shining prevention member 15 is also in close contact with the front side of the reflecting portion 14a so as to block the light transmitted through the reflecting portion 14a.

  The skylight preventing member 15 does not completely shield light, but slightly transmits light. For this reason, the slight amount of light that has passed through the skylight preventing member 15 causes the base portion 12a of the pointer portion 12 to emit light.

  A light guide member (cylindrical light guide member) 20 through which the output shaft 4a and the rotation shaft 11 of the pointer 10 penetrate is provided inside the cylindrical portion 6a.

  The light guide member 20 is formed of a colorless and transparent synthetic resin material and has a cylindrical shape with both ends open. The outer peripheral surface 20 a is formed with a flange portion 21 that engages with the annular engaging portion 7 that projects from the inner peripheral surface of the cylindrical portion 6 a of the reflecting member 6.

  Thereby, the light guide member 20 is held in the cylindrical portion 6a with a gap between the light guide member 20 and the substrate 2, and the light guide member 20 is disposed in the vicinity of the output shaft 4a. In this case, it is disposed between the reflecting portion 14a formed on the base portion 12a of the pointer portion 12.

  When the flange portion 21 is engaged with the front surface 7 a (see FIG. 2) side of the annular engagement portion 7, the light guide member 20 has one end portion 22 facing the pointer portion 12 at the front surface 3 a of the display plate 3. Than protrude.

  Further, the light guide member 20 has an incident surface portion 24 on which light from the light source 5 is incident on the other end portion 23 facing the light source 5, and an end portion 22 protruding from the front surface 3 a of the display panel 3. An emission surface portion 25 that emits light from the light source 5 toward the pointer portion 12 and an inclined surface portion 26 that reflects light from the light source 5 toward the pointer portion 12 and the display plate 3 are formed. .

  The incident surface portion 24, the exit surface portion 25, and the inclined surface portion 26 are each formed in an annular shape over the entire circumference of the light guide member 20.

  The incident surface portion 24 is substantially parallel to the substrate 2, and light incident from the incident surface portion 24 enters the light guide member 20.

  On the other hand, the emission surface portion 25 is substantially parallel to the lower surface 13 a of the pointer portion 12, and light emitted from the emission surface portion 25 enters the pointer portion 12.

  The inclined surface portion 26 is formed on the inner side of the emission surface portion 25, that is, on the inner peripheral surface 20 b side of the light guide member 20, and is inclined so as to gradually increase the diameter of the inner peripheral surface 20 b toward the pointer portion 12. ing. The inclined angle of the inclined surface portion 26 is substantially the same as that of the reflecting portion 14 a formed on the pointer portion 12.

  Further, the inclined surface portion 26 is formed at a position overlapping the shining prevention member 15 in a front view (when the pointer 10 is viewed from the direction of arrow A shown in FIG. 1).

  Next, the operation of the display device 1 according to the present invention will be described.

  In the display device 1, when a plurality of light sources 5 are turned on, light from the light sources 5 and 5 disposed inside the cylindrical portion 6 a is transmitted from the incident surface portion 24 of the light guide member 20 into the light guide member 20. Is incident on.

  A part of the light in the light guide member 20 is emitted from the emission surface portion 25. The light emitted from the emission surface portion 25 is directed toward the pointer portion 12 and enters the pointer portion 12 as indicated by an arrow X in FIG. The light incident on the pointer portion 12 is emitted from the upper surface 13b of the pointer portion 12 and travels toward the distal end portion 12b while being reflected inside. As a result, the entire upper surface 13b of the pointer portion 12 is lit and displayed.

  Further, a part of the light in the light guide member 20 is reflected by the inclined surface portion 26, and in the space S (see FIG. 2) between the pointer portion 12 and the display plate 3 as indicated by an arrow Y in FIG. It is emitted toward.

  Thereby, the space S between the pointer portion 12 and the display plate 3, that is, the circular area X (see FIG. 3) centering on the output shaft 4a and the rotation shaft 11 of the pointer 10 can be illuminated. In addition, when the pointer 10 is lit and displayed, it is possible to easily change the appearance and improve the appearance.

  That is, by arranging the cylindrical light guide member 20 between the light source 5 and the reflecting portion 14 a, the pointer 10 is displayed by emitting light from one light source 5, and at the same time, the pointer portion 12, the display plate 3, The space S can be illuminated, and the appearance can be improved with a simple configuration.

  Further, the light transmitted through the inclined surface portion 26 without being reflected by the inclined surface portion 26 is incident on the pointer portion 12 and then formed on the pointer portion 12 as indicated by a one-dot chain line arrow Z in FIG. Reflected by 14a.

  Further, the light transmitted through the reflecting portion 14 a without being reflected by the reflecting portion 14 a is shielded by the skylight preventing member 15. Here, since the shining prevention member 15 does not completely shield the light, a small amount of light transmitted through the shining prevention member 15 is emitted from the upper surface 13b of the pointer portion 12 (not shown).

  At this time, the inclined surface portion 26 is formed at a position overlapping the shining prevention member 15 in a front view, but the light shielded by the shining prevention member 15 is almost preliminarily placed in the space S by the inclined surface portion 26. Reflected towards.

  For this reason, there is almost no light finally shielded by the sun protection member 15, and the light from the light source 5 can be used without waste.

  Further, in the above-described embodiment, the light guide member 20 emits a part of the light from the light source 5 at the one end 22 toward the pointer part 12 by the emission surface part 25 and reflects a part by the inclined surface part 26. Yes.

  Therefore, by adjusting the area of the emission surface portion 25 and the inclined surface portion 26, the brightness of the pointer 10 and the brightness of the space S between the pointer portion 12 and the display board 3 can be easily made different. . Then, by adjusting the brightness, for example, it is possible to obtain an illumination effect that raises the pointer 10.

  In the above-described embodiment, the inclined surface portion 26 is formed over the entire circumference of the light guide member 20, and as shown in FIG. 3, the inclined surface portion 26 is omnidirectional (centering on the base portion 12a of the pointer portion 12). 360 degrees).

  Here, by adjusting the range in which the inclined surface portion 26 is formed, the light incident on the light guide member 20 is illuminated on an arbitrary portion of the circular area around the output shaft 4a and the rotation shaft 11 of the pointer 10. Can improve the appearance.

  Furthermore, the size of the circular area (illumination area) can be adjusted by adjusting the light quantity of the light source 5.

It is sectional drawing which shows the display apparatus which concerns on this invention. It is sectional drawing to which the principal part of the display apparatus which concerns on this invention was expanded. It is a front view which shows the display apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display apparatus 3 Display board 4 Movement 4a Output shaft 5 Light source 10 Pointer 12 Pointer part 14a Reflection part 20 Cylindrical light guide member 25 Output surface part 26 Inclined surface part

Claims (1)

A substrate, a display plate disposed on the front side of the substrate and having an indicator portion formed thereon, a pointer that is rotatable by a movement and indicates the indicator portion, and a light source,
The pointer extends in the same direction as the output shaft of the movement and penetrates the display plate; a pointer portion extending from the tip of the rotation shaft along the display plate; and a base portion of the pointer portion And a reflection part that reflects the light emitted from the light source toward the tip part of the pointer part,
The light from the light source is incident and the light exiting surface emits the incident light toward the pointer portion, and the light from the light source is incident and directed between the pointer portion and the display plate. A cylindrical light guide member that reflects and illuminates a circular area centered on the output shaft, and the output shaft extends through the central shaft portion between the light source and the reflective portion. A display device characterized by being arranged in the above.

Images