JP6741210B2 - Pointer-type instrument device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer-type instrument device used in, for example, a vehicle instrument, and 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 penetrates an opening formed in alignment with a display plate and a light guide disposed on the back surface of the display plate. .. Illumination light is guided from the opening edge portion of the light guide body to the light receiving portion of the pointer through the opening edge portion of the display plate on the light guide body, and the illumination light makes the indicator member shine to improve the visibility of the pointer. It enhances the decorativeness as well.

A cover member for preventing leakage of illumination light is attached to the base of the pointer to which the rotating shaft is coupled. This cover member is provided with a slit that opens to the lower edge, the cover member covers the base of the pointer so that the pointer indicating member can be inserted through the slit, and the display plate through which the rotary shaft of the pointer is inserted. It is attached 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 plate, the decoration effect is impaired by the halation illumination caused by the leaked light. In particular, light leaking from the gap at the lower edge of the slit of the cover member through which the pointer penetrates causes strong halation illumination. Since the light leaked from the lower edge of the slit of the cover member is observed under the pointer, it is easily observed from the oblique direction of the instrument, and therefore, it is particularly noticeable from the passenger seat of the vehicle.

The present invention has been made in view of such a point, and has a display plate 1 having an index portion 1a, a pointer 5 for pointing the index portion 1a, a shaft portion 3a for operating the pointer 5, and the pointer 5. A light emitting element 2a that emits illumination light for illuminating the indicator light, and the pointer 5 includes a light receiving unit 13 that receives the illumination light and an indicator 12 that is illuminated by the illumination light. An opaque cover member 20 that has the pointing member 10 and the slit portion 21 through which the pointing member 10 is inserted and that covers the light receiving portion 13, and a light blocking portion 31 that prevents the illumination light from leaking from the slit portion 21. And a light-shielding portion 31 having a first light-shielding wall 31a inserted into the slit portion 21 and a second light-shielding wall 31a facing the inner peripheral surface 23 and not inserted into the slit portion 21. And a light shielding wall 31b,
The second light shielding wall bottom surface 31c of the second light shielding wall 31b is set at 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, Halation illumination around the outer peripheral surface 22 by the illumination light L1 leaking from the gap 5b with the display plate 1, and halation illumination by the illumination light L1′ leaking from the gap 5b at a portion corresponding to the light shielding portion 31, Halation illumination by the illumination light L2 leaking from under the second light shielding wall bottom surface 31c of the slit portion 21 is at the same level .

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Further, in the present invention, the cover member 20 has a sheath-shaped cover portion 26 that covers the pointing member 10 protruding from the outer peripheral surface 22.

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

Further, according to the present invention, the outer peripheral surface 22 and the light shielding wall 31 have the same color.

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

The front view which shows embodiment of this invention. Sectional drawing which followed the AA line in FIG. The exploded perspective view of the pointer of the present invention. The perspective view of the pointer of this invention. Sectional drawing which followed the BB line in FIG. Sectional drawing which followed CC line in FIG.

An embodiment of the present invention will be described below with reference to the accompanying drawings 1 to 6. As shown in FIG. 1, the pointer-type measuring instrument device forms a speedometer that indicates the traveling speed of the automobile.

The pointer type instrument device includes a display board 1, a circuit board 2 arranged behind the display board 1, a stepping motor (driving body) 3 mounted behind the circuit board, and a front surface of the circuit board 2. A case body 4 provided to support the display plate 1 and a pointer 5 rotatably driven by a drive shaft (shaft portion) 3a of the stepping motor 3 protruding from the front surface of the display plate 1 to the front surface of the circuit board 2 are provided. There is.

The display plate 1 has a thin plate-shaped substrate made of a light-transmissive resin, and a light-transmitting colored layer, a light-shielding layer, a light-diffusing layer, or the like is printed on the light-transmissive resin to form an indicator portion 1a including a scale of a speedometer and numbers. It is a thing. The indicator 1a is designated by the indicator 12 of the pointer 5.

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

The light emitting diode 2a is composed of a top-view type LED (Light Emitting Diode), and emits red illumination light to illuminate the pointer 5. The light emitting diode 2b is composed of a top-view type LED, and emits white illumination light to illuminate the indicator portion 1a of the display plate 1 with transmission.

The case body 4 is made of 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 tip portion 4b at the tip of the surrounding wall 4a.

The enclosing wall 4a prevents the illumination light emitted by the light emitting diode 2a from irradiating the index portion 1a side, and also prevents the illumination light emitted by the light emitting diode 2b from entering the light receiving portion 13.

The end portion 4b of the surrounding wall is tubular and protrudes toward the front surface of the display plate 1 to guide the illumination light emitted by the light emitting diode 2a to the light receiving portion 13, and the illumination light emitted by the light emitting diode 2a and the outer peripheral surface bottom surface 27 and the display plate. It is prevented from directly leaking through the gap 5b with the first member. Further, the surrounding wall front end portion 4b has a hook-shaped locking portion (not shown) at an outer cylindrical position, and locks and fixes the display plate 1.

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

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

The indicator 12 has a shape protruding radially from the outer peripheral surface 22 and gradually tapering linearly. A reflective layer made of a red hot stamp foil is formed on the lower surface of the indicator 12, and the reflective layer shines due to the reflected light from the reflective surface 11 and is visually recognized from the indicator opening 24.

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

The outer peripheral surface 22 has a sheath-shaped cover portion 26 that extends in the radial direction from the outer peripheral surface 22 and covers the front surface of the indicator 12, both side surfaces, and the tip. The sheath-shaped cover portion 26 is a tip fixing portion for sandwiching and fixing the indicator opening 24 opened for visually recognizing the illumination light from the indicator 12, and the tip of the indicator 12 and the tip of the receiving portion 35 in an overlapping manner. 25 and.

Further, the cover member 20 has a slit portion 21 on a lower side of the sheath-shaped cover portion 26, in which a part of the outer peripheral surface 22 is cut out for inserting the indicating member 10 into the cover member 20.

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

The disk-shaped portion 32 engages with the pair of hooks 28 set on the inner peripheral surface 23 on the back surface, and clamps and fixes the indicator member 10 and the weight 40 with the cover member 20. Further, the disk-shaped portion 32 has a pointer insertion portion (boss portion) 33 extending in a cylindrical shape on the back surface, and the drive shaft 3a of the stepping motor 3 is press-fitted into the hole portion.

The disc-shaped portion 32 extends from the disc-shaped portion 32 to the tip fixing portion 25 so that a part thereof passes through the slit portion 21 in the radial direction at the lower surface position of the indicator portion 12, and the lower surface of the sheath-shaped cover portion 26. It has a receiving portion 35 formed so as to cover the top, and prevents the reflected light from the reflecting surface 11 from leaking to the display plate 1 side. Further, the disk-shaped portion 32 has a light receiving portion opening 34 opened so as to penetrate the light receiving portion 13, and guides the illumination light emitted by the light emitting diode 2 a to the light receiving portion 13.

The weight 40 is formed by processing a metal material, is arranged between the cover member 20 and the base 30, and is designed so that the balance center of gravity 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 by the light emitting diode 2a that illuminates the pointer 5 is received by the light receiving section 13, and most of it is reflected by each surface due to the light receiving area of the light receiving section 13. Then, finally, the light leaks from the gap 5b to generate the leaked light L1, which illuminates the display plate 1 and the periphery of the outer peripheral surface 22 becomes the halation illumination. Further, in the slit portion 21, a part of the illumination light emitted by the light emitting diode 2a is reflected on each surface and leaks from the slit portion 21 to generate leakage light L2, which illuminates the display board 1 to serve as halation illumination.

The leaked light L2 has a larger light quantity than the leaked light L1 because it is not attenuated on the inner peripheral surface 23 with respect to the leaked light L1 attenuated between the surrounding wall tip portion 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 entire halation illumination becomes uncomfortable, which impairs the commercial property.

In view of this, in the present invention, the disc-shaped portion 32 has the light-shielding portion 31 that is formed so as to at least partially oppose the inner peripheral surface 23 and that protrudes to the back surface, in order to prevent leakage light L2 from the slit portion 21. ..

As shown in FIGS. 4 and 5, the light-shielding portion 31 of the present embodiment has a first light-shielding wall 31a formed so as to fill a gap at a position corresponding to the slit portion 21, and has an outer peripheral surface in appearance. Make up for 22 defects. A pair of gaps 5a are formed between the edge of the slit portion 21 and the edge of the first light shielding wall 31a due to the accuracy of component dimensions.

In addition, the light blocking portion 31 extends from the inner side surface of the first light blocking wall 31 a in an L shape, passes through the gap 5 a, and is not inserted into the slit portion 21 formed to face the inner peripheral surface 23. It has a second light shielding wall 31b.

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 plate 1 than the outer peripheral surface bottom surface 27 of the outer peripheral surface 22, and the leaked light L1 is set. And the amount of leaked light L2 is adjusted. In the portion corresponding to the light blocking wall 31, the leaked light L1 is attenuated more than the leaked light L1 when leaking from the gap 5b because the gap 5c with the wall front end 4b surrounded by the second light blocking wall 31b is narrowed. It becomes L1' and becomes a halation illumination for irradiating the display plate 1. The leakage light L2 is shielded up to the height of the second light shielding wall bottom surface 31c, becomes leakage light L2' which leaks from under the second light shielding wall bottom surface 31c, and illuminates the display plate 1 to serve as 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, Halation lighting is used so that it can be seen uniformly 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 the pointer type instrument device capable of enhancing the illumination quality of the halation illumination without impairing the appearance of the pointer 5.

Further, in the present embodiment, the pointer type instrument device capable of enhancing the commercial appearance is set by setting the color of the outer peripheral surface 22 and the color of the light shielding wall 31 to be similar colors by painting or material coloring. Can be provided.

The present invention is not limited to this embodiment, and various modifications can be made.

For example, the light blocking portion 31 of the present embodiment has the first light blocking wall 31a and the pair of second light blocking walls 31b. It may be a form in which the two light shielding walls 31b are connected and integrated.

Further, the cover member 20 has the front surface of the indicating portion 12, both side surfaces, and the sheath-like cover portion 26 that covers the tip, but the tip of the indicating portion 12 may not be covered if it is unnecessary in the design. However, it may be a shape without the sheath-shaped cover portion 26 itself.

Further, the base portion 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 plate 1 side.

Further, although the surrounding wall 4a has the surrounding wall tip portion 4b, it is not necessary to use a light shielding collar member or the like instead.

1 display board 1a indicator part 2a light emitting diode (light emitting element)
3a Drive shaft (shaft part)
5 pointers 10 indicator member 12 indicator section 13 light receiving section 20 cover member 21 slit section 22 outer peripheral surface 23 inner peripheral surface 26 sheath cover section 27 outer peripheral surface bottom surface 30 base section 31 light shielding section 31a first light shielding wall 31b second light shielding wall 31c Second light shielding wall bottom surface 35 Receiving portion

Claims (4)

A pointer-type instrument device including a display plate having an index portion, a pointer for pointing the index portion, a shaft portion for operating the pointer, and a light emitting element for emitting illumination light for shining the pointer. The pointer has an opaque cover member that has a light receiving portion that receives the illumination light and an instruction portion that shines by the illumination light, and a slit portion through which the instruction member is inserted and that covers the light receiving portion. And a base portion having a light shielding portion that prevents the illumination light from leaking from the slit portion, and the light shielding portion has a first light shielding wall inserted into the slit portion and the inner peripheral surface. A second light-shielding wall that faces and is not inserted into the slit portion,
The second light shielding wall bottom surface of the second light shielding wall is set at a position farther from the display plate than the outer peripheral surface bottom surface of the outer peripheral surface of the cover member, from the gap between the outer peripheral surface bottom surface and the display plate. Halation illumination around the outer peripheral surface by the leaking illumination light, halation illumination by the illumination light leaking from the gap at a portion corresponding to the light shielding portion, and leaking from under the second light shielding wall bottom surface of the slit portion. A pointer-type instrument device characterized in that the level of halation illumination by the illumination light is at the same level . The pointer-type instrument device according to claim 1, wherein the cover member has a sheath-shaped cover portion that covers the pointing member protruding from the outer peripheral surface. The pointer type instrument device according to claim 2 , wherein the base portion has a receiving portion that supports the indicating portion below the sheath-shaped cover portion. The pointer-type instrument device according to any one of claims 1 to 3 , wherein the outer peripheral surface and the light-shielding wall have the same color.

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