JPH0573534U - Guidelines for vehicle instruments - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pointer for a vehicle instrument, which can emit light with high brightness and uniformly, and which can reduce the weight of the pointer main body. [Structure] A slit 8 as a light-transmitting portion extending in the axial direction of the pointer body is formed on the peripheral surface of a pointer body 3 formed in the shape of a hollow cylinder, and the slit of the pointer body is removed except for this slit. A reflecting surface 9 is formed on the inner surface, and a prism film 10 that emits light incident at a predetermined angle with a predetermined directivity is attached to the inner surface of the slit, and a light source 7 that irradiates light into the inside of the pointer main body is provided. It is arranged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer for a vehicle instrument, and more particularly to a pointer for a vehicle instrument that is disposed on a dial plate portion of a vehicle such as an automobile and emits light at night.

[0002]

[Prior Art]

 Generally, in various vehicles such as automobiles, there are often used vehicle instruments in which a pointer indicating a predetermined scale on a dial of the instrument is illuminated at night.

FIG. 7 shows a pointer of such a conventional vehicle instrument. For example, a pointer 1 made of a transparent material such as acrylic resin and a base portion 2 connected to a movement of an instrument unit not shown. The pointer body 3 extends from the outer peripheral portion of the base portion 2, and the light introduced into the base portion 2 is reflected inside the base portion 2 of the pointer 1 toward the finger needle body 3 side. The reflection part 4 is formed. A light guide plate 5 that emits light to the base portion 2 of the pointer 1 is disposed behind the pointer 1, and a part of the light guide plate 5 is bent downward to form a light guide portion. It is supposed to be 6. Further, a light source 7 such as a lamp is arranged near the light guide portion 6 of the light guide plate 5.

In such a conventional pointer, by turning on the light source 7 at night, light from the light source 7 is guided to the base portion 2 of the pointer 1 through the light guide plate 5, The light incident on the base portion 2 of No. 1 is sent to the tip of the pointer main body 3 through the inside of the pointer main body 3 via the reflecting portion 4. As a result, the entire pointer body 3 is illuminated so that the pointer 1 can be visually recognized.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned pointer of the conventional vehicle instrument, since the pointer main body 3 is formed of a transparent solid material, the light introduced into the base portion 2 of the pointer 1 is guided to the tip portion. The brightness at the tip of the pointer body 3 is reduced, and the brightness at the base 2 and the tip of the pointer 1 becomes uneven, and the entire pointer 1 can emit light with high brightness. In addition, there is a disadvantage that the visibility of the pointer is poor.

Moreover, since the pointer main body 3 is made of a solid material, the weight of the pointer 1 becomes large, the load of the movement of the meter unit driving the pointer 1 becomes large, and the meter unit becomes large. It also has the inconvenience of being lost.

The present invention has been made in view of the above points, and provides a pointer for a vehicle instrument that can emit light with high brightness and evenness, and can reduce the weight of the pointer. The purpose is that.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the pointer of the vehicle instrument according to the present invention is arranged on the dial portion of the vehicle instrument, and is driven based on a predetermined measurement amount to indicate a predetermined scale portion of the dial. In addition, in the pointer of the vehicle instrument that emits light when the light source is turned on, the slit-shaped translucent light that extends in the axial direction of the pointer body is formed on the peripheral surface of the pointer body that is formed in a hollow cylindrical shape. Is formed, and a reflecting surface is formed on the inner surface of the pointer main body excluding the light transmitting portion, and a prism film that emits light incident at a predetermined angle with a predetermined directivity is arranged on the light transmitting portion. It is characterized in that a light source for irradiating light is provided inside the pointer main body.

[0009]

[Action]

 According to the present invention, the light emitted from the light source is incident on the prism film while being diffusely reflected by the reflection surface on the inner surface of the pointer body, and the light incident on the prism film passes through the inside of the prism film and is guided by the pointer body. By emitting light with a predetermined directivity from the light-transmitting part of the needle, the pointer body emits slit-like light at the light-transmitting portion, and this light-emitting portion can be visually recognized. Since the inner part of the pointer is hollow and the light is emitted with a certain directivity by the prism film, there is no attenuation of the light inside the pointer body, and the light transmission of the pointer body does not occur. Light is emitted evenly at any position of the portion, and the pointer body can be visually recognized with high-luminance light.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 show an embodiment of a pointer of a vehicle instrument according to the present invention, for example, a pointer main body 3 of the pointer 1 disposed on the back side of a dark semi-transparent front glass. Is made of a transparent material such as polycarbonate, and is formed into a cylindrical shape with a hollow inside, and the transparent surface extending in the axial direction of the pointer body 3 is formed on the peripheral surface of the pointer body 3. A slit 8 as a part is formed. A reflecting surface 9 made of white paint or the like is formed on the inner surface of the pointer body 3 except for the slit 8 portion, and the inner surface of the slit 8 portion of the pointer body 3 is, for example, a product. A prism film 10 such as "SOLF" (manufactured by Sumitomo 3M) is attached so as to close the slit 8. Further, on the outer surface of the pointer main body 3, a light-shielding layer 11 formed by black coating or the like is formed except for the slit 8 portion.

The prism film 10 has a light-incident surface on which one surface is continuously formed with minute prisms, and a smooth light-exit surface on the other surface, and the prism film 10 has a light-incident surface. The light surface is arranged inside the pointer main body 3. As shown in FIG. 4, when the light enters the prism film 10 at a shallow angle θ of about 20 ° or less on the light entrance surface 10a side, the light passes through the prism film 10 and exits the light exit surface. It has the property of being emitted as light substantially perpendicular to 10b with a certain directivity.

A light source 7 is attached to the base end portion of the pointer main body 3, and an end plate 12 having an inner surface as a mirror is attached to the tip end portion of the pointer main body 3.

Next, the operation of this embodiment will be described. In this embodiment, by turning on the light source 7, a part of the light emitted from the light source 7 is directly incident on the prism film 10 and a part of the light on the inner surface of the pointer main body 3 is emitted. The light is diffusely reflected by the reflecting surface 9 and reflected by the mirror plate 12 to enter the prism film 10. The light incident on the prism film 10 passes through the inside of the prism film 10 and is emitted from the slit 8 of the pointer main body 3 in a direction substantially perpendicular to the prism film 10. As a result, the pointer main body 3 emits light at the slit 8 portion, and this light emitting portion can be seen.

In this case, in the present embodiment, the inside of the pointer main body 3 is formed hollow, and the reflecting surface 9 is formed on the inner surface thereof. Since the light is emitted with a certain directivity in the vertical direction, there is no attenuation of the light inside the pointer body 3, and the light is emitted uniformly at any position of the slit 8 of the pointer body 3. In addition, since the directivity of light is extremely strong, it is possible to visually recognize the pointer main body 3 with high-luminance light.

Therefore, in the present embodiment, the pointer body 3 is formed hollow, the reflecting surface 9 is formed on the inner surface thereof, and the prism film 10 is arranged at the slit-shaped light emitting portion of the light. It is possible to prevent the light from being attenuated, to make the pointer main body 3 emit light uniformly and with high brightness, and it is possible to remarkably improve the visibility of the pointer 1. Moreover, since the pointer main body 3 is formed hollow, the weight of the pointer main body 3 can be reduced, the load on the movement of the meter unit that drives the pointer 1 can be reduced, and the size of the meter unit can be reduced. Can be planned.

5 and 6 show another embodiment of the present invention, in which the prism film 10 is attached to the entire inner surface of the pointer main body 3, and the other parts are shown. Since it is similar to that of the above-mentioned embodiment, its explanation is omitted.

Also in this embodiment, as in the case of the above-described embodiment, the light incident on the prism film 10 from the light source 7 passes through the inside of the prism film 10 and is transmitted from the slit 8 of the pointer main body 3 to the prism film 10. Light is emitted in a substantially vertical direction, whereby the pointer body 3 emits light in the slit 8 portion thereof, and this light emitting portion can be visually recognized. In this case, the inside of the pointer body 3 is formed to be hollow. Moreover, since the prism film 10 emits light with a certain directivity in a direction substantially perpendicular to the pointer body 3, there is no light attenuation inside the pointer body 3, and Since the directivity of light is extremely strong, the pointer main body 3 can be made to emit light with high brightness and uniformly.

Therefore, also in this embodiment, the visibility of the pointer 1 can be remarkably improved, the weight of the pointer main body 3 can be reduced, and the load of the movement of the meter unit that drives the pointer 1 can be reduced. Can be reduced, and the instrument unit can be downsized.

In comparison with the above embodiment, the prism film 10 that is simply rounded into a cylindrical shape is used without considering the positional relationship between the slit 8 formed in the pointer body 3 and the prism film 10. It is easier to manufacture because it only needs to be installed inside.

It should be noted that the present invention is not limited to the above embodiment, but can be variously modified as necessary. In the above embodiment, the pointer body 3 is formed of a transparent material, and Although the light shielding layer 11 is formed on the outer surface, the pointer body 3 may be formed of an impermeable material so that the light shielding layer on the outer surface thereof may be omitted. Further, the slit 8 formed in the pointer main body 3 does not necessarily need to be cut out as long as it is a translucent portion, and further, the prism film 10 attached to the inner surface of the slit 8 portion is provided on the outer surface of the slit 8 portion. You may make it stick to.

[0021]

As described above, the pointer of the vehicle instrument according to the present invention has a hollow main body of the pointer, a reflective surface formed on the inner surface thereof, and a prism film on the light-slit-shaped light emitting portion. Since it is arranged, the attenuation of light can be prevented, the main body of the pointer can be made to emit light uniformly and with high brightness, and the visibility of the pointer can be remarkably improved. Moreover, since the pointer main body is formed hollow, the weight of the pointer main body can be reduced, the load on the movement of the instrument unit that drives the pointer main body can be reduced, and the instrument unit can be downsized. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a pointer of a vehicle instrument according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is an explanatory diagram showing light transmission characteristics of a prism film.

FIG. 5 is a cross-sectional view showing another embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view of FIG.

FIG. 7 is a cross-sectional view showing a conventional vehicle instrument.

[Explanation of symbols]

 1 Pointer 3 Pointer body 7 Light source 8 Slit 9 Reflective surface 10 Prism film 11 Light-shielding layer 12 End plate

Claims (1)

[Scope of utility model registration request] 1. A vehicle instrument, which is disposed on a dial portion of a vehicle instrument, is driven based on a predetermined measurement amount to indicate a predetermined scale portion of the dial, and emits light when a light source is turned on. In the pointer, the slit-shaped light-transmitting portion extending in the axial direction of the pointer body is formed on the peripheral surface of the pointer body, which is hollow inside, and the above-mentioned pointer is excluded. A reflecting surface is formed on the inner surface of the main body, and a prism film that emits light incident at a predetermined angle with a predetermined directivity is disposed on the light transmitting portion.
A pointer for a vehicle instrument characterized in that a light source for irradiating light is arranged inside the pointer main body.