JP2017207419A - Pointer-type instrument device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pointer-type instrument device capable of improving an illumination quality by reducing leakage of light to a display plate of a pointer and suppressing strong halation from occurring at a part of a periphery of a cover member.SOLUTION: The pointer-type instrument device includes: a display plate 1 having an index part; a pointer 5 for indicating the index part; a shaft part 3a for moving the pointer 5; and a light-emitting element 2a for emitting illumination light for making the pointer 5 shine. The pointer 5 includes an indication member 10 having a light receiving part 13 for receiving the illumination light and an indication part 12 shone by the illumination light, a transparent cover member 20 having a slit in which the indication member 10 is inserted and covering the light receiving part 13, and a base part 30 having a light shielding part 31 preventing leakage of the illumination light from the slit, where at least a part of the light shielding part 31 faces an inner peripheral surface 23 of the cover member 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pointer-type instrument device employed in, for example, a vehicle instrument, and more particularly to a pointer-type instrument device in which a pointer shines when a light source is turned on.

  In a pointer-type instrument device having a pointer illumination function, a pointer is attached at its base to a rotary shaft that passes through an opening formed in alignment with a display plate and a light guide disposed on the back of the display plate. . Illumination light is guided from the opening edge of the light guide through the opening edge of the display plate on the light guide to the light receiving part of the pointer, and this illumination light illuminates the indicator member, thereby improving the visibility of the pointer. Increases decorativeness as well as increasing.

  A cover member for preventing leakage of illumination light is attached to the base of the pointer to which the rotary shaft is coupled. The cover member is provided with a slit opened at the lower edge. The cover member covers the base of the pointer so that the pointer indicating member is inserted through the slit, and the display plate through which the rotating shaft of the pointer is inserted. It is mounted so as to cover the opening edge.

Patent No. 3305297

  However, if the illumination light leaks from the gap between the lower edge of the cover member and the display board, the decoration effect is impaired by the halation illumination caused by the leaked light. In particular, leakage light from the gap at the lower edge of the slit of the cover member through which the pointer penetrates causes strong halation illumination. The light leaking from the lower edge of the slit of the cover member is observed under the pointer, so that it is easily observed from an oblique direction of the instrument, and is therefore particularly noticeable from the passenger seat of the vehicle.

  The present invention has been made in view of these points. The display board 1 having the indicator portion 1a, the pointer 5 for indicating the indicator portion 1a, the shaft portion 3a for operating the pointer 5, and the pointer 5 A pointer-type instrument device comprising: a light emitting element 2a that emits illumination light for shining light, wherein the pointer 5 includes a light receiving unit 13 that receives the illumination light and an instruction unit 12 that shines by the illumination light. The indicator member 10 has an opaque cover member 20 that includes the slit portion 21 through which the indicator member 10 is inserted and covers the light receiving portion 13, and a light shielding portion 31 that prevents the illumination light from leaking from the slit portion 21. And at least a part of the light shielding portion 31 is opposed to the inner peripheral surface 23 of the cover member 20.

  Further, according to the present invention, the light shielding part 31 includes a first light shielding wall 31a inserted into the slit part 21, and a second light shielding wall 31b facing the inner peripheral surface 23 and not inserted into the slit part 21. , Has.

  Further, according to the present invention, the second light shielding wall bottom surface 31 c of the second light shielding wall 31 b has a position farther from the display plate 1 than the outer peripheral surface bottom surface 27 of the outer peripheral surface 22 of the cover member 20. is there.

  In the present invention, the cover member 20 has a sheath-like cover portion 26 that covers the indicating member 10 protruding from the outer peripheral surface 22.

  Further, according to the present invention, the base 30 has a receiving portion 35 that supports the indication portion 12 below the sheath-like cover portion 26.

  In the present invention, the outer peripheral surface 22 and the light shielding wall 31 have similar colors.

  It is possible to prevent light from leaking from the slit portion through which the indicating member is inserted into the display plate, to suppress strong halation illumination from being caused in a part of the periphery of the cover member, and to improve the illumination quality.

The front view which shows embodiment of this invention. Sectional drawing along the AA line in FIG. The disassembled perspective view of the pointer | guide of this invention. The perspective view of the pointer | guide of this invention. Sectional drawing along the BB line in FIG. Sectional drawing along CC line in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the pointer-type instrument device forms a speedometer that indicates the traveling speed of an automobile.

  The pointer-type instrument device is arranged on the front surface of the display board 1, the circuit board 2 disposed behind the display board 1, the stepping motor (driving body) 3 mounted behind the circuit board, and the circuit board 2. A case body 4 provided to support the display board 1 and a pointer 5 that is driven to rotate by a drive shaft (shaft portion) 3a of the stepping motor 3 protruding from the front face of the circuit board 2 at the front face of the display board 1. Yes.

  The display board 1 is formed with an indicator portion 1a composed of a scale of speedometers, numbers, etc. by printing a translucent colored layer, a light shielding layer, a light diffusion layer, etc. on a thin plate-like substrate made of a translucent resin. Is. The indicator unit 1a is instructed by the instruction unit 12 of the pointer 5.

  The circuit board 2 is composed of a hard printed board in which a wiring pattern is formed on a flat glass epoxy base material. A light emitting diode (light emitting element) 2a, a light emitting diode 2b, and the like are mounted on the front surface of the circuit board 2.

  The light emitting diode 2a is a top-view type LED (Light Emitting Diode), and emits red illumination light to shine the pointer 5. The light emitting diode 2b is a top-view type LED, and emits white illumination light to illuminate the indicator portion 1a of the display panel 1 in a transmitted manner.

  The case body 4 is made of a white resin, has a surrounding wall 4a so as to surround the light emitting diode 2a and the drive shaft 3a, and has a surrounding wall front end portion 4b at the front end of the surrounding wall 4a.

  The surrounding wall 4a prevents the illumination light emitted from the light emitting diode 2a from being irradiated to the indicator portion 1a side, and prevents the illumination light emitted from the light emitting diode 2b from entering the light receiving portion 13.

  The front end portion 4b of the enclosure wall is cylindrical and protrudes to the front surface of the display board 1, guides the illumination light emitted from the light emitting diode 2a to the light receiving section 13, and the illumination light emitted from the light emitting diode 2a is connected to the outer peripheral surface bottom surface 27 and the display board. 1 is prevented from leaking directly from the gap 5b. Moreover, the surrounding wall front-end | tip part 4b has the hook-shaped latching | locking part which is not illustrated in a cylindrical outer position, and latches and fixes the display board 1. FIG.

  As shown in FIG. 3, the pointer 5 is made of various synthetic resins and metal materials, and includes an indicating member 10, a cover member 20, a base portion 30, and a weight 40.

  The indication member 10 is made of a translucent resin, receives illumination light emitted from the light emitting diode 2 a from the light receiving portion 13, and reflects it to the indication portion 12 by the reflecting surface 11.

  The instruction part 12 protrudes from the outer peripheral surface 22 in the radial direction, and has a shape that gradually becomes linear. A reflective layer made of a red hot stamp foil is formed on the lower surface of the indication unit 12, and the reflection layer shines by the reflected light from the reflection surface 11 and is visually recognized from the indication unit opening 24.

  The cover member 20 is made of a light-shielding opaque resin, and covers the light receiving portion 13 and the reflecting surface 11 with a cup-shaped outer peripheral surface 22 having a substantially cylindrical shape with an open bottom surface. The cover member 20 press-fits and fixes the weight 40 with a rib (not shown) set on the inner peripheral surface 23.

  The outer peripheral surface 22 has a sheath-like cover portion 26 that extends in the radial direction from the outer peripheral surface 22 and covers the front surface, both side surfaces, and the tip of the indicating portion 12. The sheath-like cover portion 26 is a tip fixing portion that clamps and fixes the indication portion opening portion 24 opened to visually recognize the illumination light from the indication portion 12 and the tip end of the indication portion 12 and the tip end of the receiving portion 35. 25.

  Further, the cover member 20 has a slit portion 21 which is cut off in order to insert a part of the outer peripheral surface 22 into the cover member 20 below the sheath-like cover portion 26.

  The base 30 is made of opaque resin having a light-shielding property. The disk-shaped portion 32 is stored inside the cover member 20 like a lid, and a pair of pins provided on the indicating member 10 is protruded from the disk-shaped portion 32 (not shown). The hole 14 is inserted and the indicating member 10 is fitted and installed, and the weight 40 is supported by the disk-shaped portion 32.

  The disk-shaped portion 32 is engaged with a pair of hooks 28 set on the inner peripheral surface 23 on the back surface, and the pointing member 10 and the weight 40 are sandwiched and fixed by the cover member 20. The disk-shaped portion 32 has a pointer insertion portion (boss portion) 33 extending in a cylindrical shape on the back surface, and press-fits the drive shaft 3a of the stepping motor 3 into the hole portion.

  The disk-shaped part 32 extends from the disk-shaped part 32 to the tip fixing part 25 so that a part of the disk-shaped part 32 passes through the slit part 21 in the radial direction at the position of the lower surface of the pointing part 12. The receiving portion 35 is formed so as to cover the lid, and the reflected light from the reflecting surface 11 is prevented from leaking to the display panel 1 side. The disc-shaped portion 32 has a light receiving portion opening 34 that is opened so as to penetrate the light receiving portion 13, and guides illumination light emitted from the light emitting diode 2 a to the light receiving portion 13.

  The weight 40 is formed by processing a metal material, and is disposed between the cover member 20 and the base 30 and is designed so that the balance center of gravity position of the pointer 5 is close to the rotation center position of the pointer 5.

  As shown in FIG. 2, not all of the illumination light emitted from the light emitting diode 2a that illuminates the pointer 5 is received by the light receiving unit 13, but most of the light is reflected on each surface due to the light receiving area of the light receiving unit 13. Finally, the light leaks from the gap 5b to generate the leaked light L1, irradiates the display panel 1, and the periphery of the outer peripheral surface 22 becomes halation illumination. Moreover, in the slit part 21, a part of illumination light emitted from the light emitting diode 2a is reflected on each surface and leaks from the slit part 21, and leaked light L2 is generated, which irradiates the display panel 1 and becomes halation illumination.

  The leakage light L2 is larger than the leakage light L1 because the leakage light L2 is not attenuated by the inner peripheral surface 23 with respect to the leakage light L1 attenuated between the enclosure wall front end 4b and the inner peripheral surface 23. The generated halation illumination is larger than the halation illumination caused by the leaked light L1, and the overall halation illumination becomes unnatural and uncomfortable.

  Therefore, in the present invention, the disc-shaped portion 32 has the light shielding portion 31 protruding on the back surface formed so that at least a part thereof faces the inner peripheral surface 23 in order to prevent the leakage light L2 from the slit portion 21. .

  As shown in FIGS. 4 and 5, the light shielding portion 31 of the present embodiment includes a first light shielding wall 31 a formed so as to fill a gap in a portion corresponding to the slit portion 21, and has an outer peripheral surface on the appearance. Compensate for 22 defects. A pair of gaps 5a is formed between the edge of the slit portion 21 and the edge of the first light shielding wall 31a in terms of component dimensional accuracy.

  The light shielding portion 31 extends in an L shape from the inner side surface of the first light shielding wall 31a, passes through the gap 5a, and is not inserted into the slit portion 21 formed so as to face the inner peripheral surface 23. Two light shielding walls 31b are provided.

  As shown in FIGS. 3 and 6, the second light shielding wall bottom surface 31c of the second light shielding wall 31b is set at a position farther from the display panel 1 than the outer peripheral surface bottom surface 27 of the outer peripheral surface 22, and the leakage light L1. The amount of leakage light L2 is adjusted. Since the gap 5c between the leakage light L1 and the surrounding wall front end 4b is narrowed by the second light shielding wall 31b at the portion corresponding to the light shielding wall 31, the leakage light attenuated from the leakage light L1 when leaking from the gap 5b. L1 ′, which is halation illumination that irradiates the display panel 1. The leaked light L2 is shielded at the height of the second light-shielding wall bottom surface 31c and becomes leaked light L2 'leaking from below the second light-shielding wall bottom surface 31c, and illuminates the display panel 1 and becomes halation illumination.

  By setting the position of the second light shielding wall bottom surface 31c so that the halation illumination by the leaked light L1 ′ and the halation illumination by the leaked light L2 ′ are at the same level as the halation illumination by the leaked light L1, the outer surface 22 The halation lighting looks uniform from the entire circumference.

  That is, since it is not necessary to change the shape of the first light shielding wall 31a, it is possible to provide a pointer-type instrument device that can improve the illumination quality of halation illumination without deteriorating the appearance of the pointer 5.

  In addition, the present embodiment provides a pointer-type instrument device that can enhance the merchantability in appearance by setting the color of the outer peripheral surface 22 and the color of the light shielding wall 31 to similar colors by painting or material coloring. Can be provided.

  In addition, this invention is not limited to this embodiment, A various deformation | transformation is possible.

  For example, the light-shielding part 31 of the present embodiment has the first light-shielding wall 31a and the pair of second light-shielding walls 31b. The two light shielding walls 31b may be connected to form a single body.

  In addition, the cover member 20 has the sheath-like cover portion 26 that covers the front surface, both side surfaces, and the distal end of the instruction portion 12. However, if the design is not necessary, the cover member 20 may have a shape that does not cover the distal end of the instruction portion 12. However, it may be a shape that does not have the sheath cover portion 26 itself.

  Further, the base 30 has the receiving portion 35, but it is not necessary if the reflected light from the reflecting surface 11 can be allowed to leak to the display panel 1 side.

  Moreover, although the surrounding wall 4a has the surrounding wall front-end | tip part 4b, it is not necessary to use a light-shielding color member etc. instead.

DESCRIPTION OF SYMBOLS 1 Display board 1a Index part 2a Light emitting diode (light emitting element)
3a Drive shaft (shaft)
5 Pointer 10 Indicating member 12 Indicating portion 13 Light receiving portion 20 Cover member 21 Slit portion 22 Outer peripheral surface 23 Inner peripheral surface 26 Sheath-shaped cover portion 27 Outer peripheral surface bottom surface 30 Base 31 Light-shielding portion 31a First light-shielding wall 31b Second light-shielding wall 31c Second light shielding wall bottom 35 receiving portion

Claims (6)

  A pointer-type instrument device comprising: a display board having an indicator portion; a pointer that points to the indicator portion; a shaft portion that operates the pointer; and a light emitting element that emits illumination light to shine the pointer. The pointer has a light receiving part that receives the illumination light and an instruction member having an instruction part that shines by the illumination light, and a non-transparent cover member that covers the light reception part and has a slit part through which the instruction member is inserted. And a base portion having a light shielding portion for preventing the illumination light from leaking from the slit portion, wherein at least a part of the light shielding portion faces the inner peripheral surface of the cover member. A pointer-type instrument device.   The said light-shielding part has a 1st light-shielding wall inserted in the said slit part, and a 2nd light-shielding wall which opposes the said internal peripheral surface and is not inserted in the said slit part, The 1st aspect is characterized by the above-mentioned. The pointer-type instrument device described in 1.   3. The pointer type according to claim 2, wherein the second light shielding wall bottom surface of the second light shielding wall has a position farther from the display plate than the outer peripheral surface bottom surface of the outer peripheral surface of the cover member. Instrument device.   4. The pointer-type instrument device according to claim 1, wherein the cover member has a sheath-like cover portion that covers the indication member protruding from the outer peripheral surface. 5.   The pointer-type instrument device according to claim 4, wherein the base portion has a receiving portion that supports the indication portion below the sheath-like cover portion.   The pointer-type instrument device according to any one of claims 1 to 5, wherein the outer peripheral surface and the light shielding wall have a similar color.

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