A kind of backlighting arrangement of auto meter dial plate
Technical field:
The utility model relates to the auto meter lighting technical field, is specifically related to a kind of backlighting arrangement of auto meter dial plate.
Background technology:
In the prior art, the backlight of auto meter dial plate directly provided by light-emitting diode, and be even in order to make dial illuminance, and reach brightness requirement, and 6 of needs or more light-emitting diode evenly are placed on the dial plate below usually.But because the light-emitting diode self characteristics, still be difficult to avoid the dial plate brightness directly over the light-emitting diode to be higher than two brightness between the light-emitting diode,, increased cost of product for guaranteeing evenly will to increase more light-emitting diode.
The utility model content:
The purpose of the utility model provides a kind of backlighting arrangement of auto meter dial plate, and it solves the problem that the direct illumination of dial plate light-emitting diode causes the dial plate brightness irregularities, under the prerequisite that meets design requirement simultaneously, and cost-cutting.
In order to solve the existing problem of background technology; The utility model is to adopt following technical scheme: it comprises lamp box 1, printing dial plate 2, pointer 3, wiring board 4, light-emitting diode 5, lamp house supporting rack 6 and light conductor 7, and lamp box 1 is formed by lamp house supporting rack 6 and light conductor 7 injection mouldings, and light conductor 7 is arranged on the top of lamp house supporting rack 6; The top of lamp box 1 is provided with printing dial plate 2; Pointer 3 is arranged on the printing dial plate 2, and the below of lamp box 1 is provided with wiring board 4, and light-emitting diode 5 is arranged on the wiring board 4.
Described light conductor 7 adopts light transmissive materials to process, and has characteristics such as light transmittance height, leaded light performance are good.
The principle of work of the utility model: through double-shot moulding technology, light conductor 7 and lamp house supporting rack 6 are combined together, structure is compact more, has avoided owing to exist assembly clearance to cause the light path loss of dial illumination between the two.Simultaneously, light conductor 7 the is integrated light guide structure of dial plate pointer 3 makes the light source that meter hand 3 can shared printing dial plate 2 illuminations.
The utility model can be saved a large amount of light-emitting diodes that is used for dial illuminance; And because the light conductor design has taken into account the pointer illumination; So saved the light source that is used for the pointer illumination again; The application of light conductor simultaneously also can be avoided the problem of the brightness disproportionation that light-emitting diode direct illumination causes, and product design is provided, and has reduced cost.
Description of drawings:
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the structural representation of lamp box among Fig. 1.
Fig. 3 is the structural representation of lamp house supporting rack among Fig. 1.
Fig. 4-Fig. 5 is the structural representation of light conductor among Fig. 1.
The specific embodiment:
With reference to Fig. 1-Fig. 5; This specific embodiment adopts following technical scheme: it comprises lamp box 1, printing dial plate 2, pointer 3, wiring board 4, light-emitting diode 5, lamp house supporting rack 6 and light conductor 7, and lamp box 1 is formed by lamp house supporting rack 6 and light conductor 7 injection mouldings, and light conductor 7 is arranged on the top of lamp house supporting rack 6; The top of lamp box 1 is provided with printing dial plate 2; Pointer 3 is arranged on the printing dial plate 2, and the below of lamp box 1 is provided with wiring board 4, and light-emitting diode 5 is arranged on the wiring board 4.
Described light conductor 7 adopts light transmissive materials to process, and has characteristics such as light transmittance height, leaded light performance are good.
The principle of work of this specific embodiment: through double-shot moulding technology, light conductor 7 and lamp house supporting rack 6 are combined together, structure is compact more, has avoided owing to exist assembly clearance to cause the light path loss of dial illumination between the two.Simultaneously, light conductor 7 the is integrated light guide structure of dial plate pointer 3 makes the light source that meter hand 3 can shared printing dial plate 2 illuminations.
This specific embodiment can be saved a large amount of light-emitting diodes that is used for dial illuminance; And because the light conductor design has taken into account the pointer illumination; So saved the light source that is used for the pointer illumination again; The application of light conductor simultaneously also can be avoided the problem of the brightness disproportionation that light-emitting diode direct illumination causes, and product design is provided, and has reduced cost.