Luminous marker lamp for steering wheel

Abstract

The light-emitting marker lamp comprises a base, a light source plate is connected to the upper portion of the base, a light guide cover is arranged above the light source plate, a light shading cover is embedded in the upper surface of the light guide cover, and the area, located outside the light shading cover, of the light-emitting face of the light guide cover is a light-emitting area. The circumference of the light guide cover is coated with a high-reflection white paint layer, and the thickness from the light emitting face of the light guide cover to the top face of the base clamping block is about 12.1 mm. Compared with a traditional scheme, the thickness is reduced by 6-12 mm, the occupied longitudinal space is reduced, and it is possible that a light-emitting marker lamp is installed on the steering wheel; the high-reflection white paint layer is coated on the circumference of the light guide cover, the problem of brightness difference between the circumference and the middle area of the light guide cover is solved, the black paint layer is coated on the non-luminous area of the light guide cover, light leakage is prevented under the combined action of the black paint layer and the high-reflection white paint layer, it is guaranteed that the light guide cover has a good visual boundary when the light source plate is lightened, and optical uniformity is improved.

Description

Technical Field

[0001] This utility model belongs to the field of sign light technology, specifically relating to a luminous sign light for a steering wheel. Background Technology

[0002] In the current automotive market, in order to create brand characteristics, adding lighting devices to various trim parts to enhance the atmosphere and visual experience has become a major direction for innovation for various brands. However, the lighting fixtures on the steering wheel are still relatively rare in the market. The main reason is that the center of the steering wheel needs to be equipped with airbags and horns, which takes up a lot of rear space, so the depth of space for installing lighting fixtures is usually only 12-15mm.

[0003] Traditional illuminated marker lights generally use the following two solutions:

[0004] 1. The illuminated sign is injection molded from a milky white scattering material. An LED is placed about 10-15mm behind the sign for direct illumination. The uniform light characteristics of the scattering material and the large incident distance of the LED achieve a relatively uniform lighting effect and shield the bright spots of the LED. The overall thickness of this solution is about 20-25mm, of which the thickness of the illuminated sign is about 4mm, the height of the LED is about 1mm, the thickness of the PCB is about 1.6mm, and the thickness of the base shell is about 2.5mm.

[0005] 2. Similarly, a milky white scattering material is used to injection mold an luminous sign. An LED is placed about 8-12mm behind the sign, and an inner lens is placed above the LED to increase the light emission angle and improve uniformity and bright spot issues. The overall thickness of this solution is about 18-22mm, of which the thickness of the luminous sign is about 4mm, the height of the LED is about 1mm, the thickness of the PCB is about 1.6mm, the thickness of the bottom shell is about 2.5mm, and the thickness of the inner lens is about 3mm.

[0006] It is evident that traditional illuminated sign light solutions cannot achieve this within a spatial depth of 8-10mm. Therefore, there is an urgent need for a solution with a lower assembly thickness while ensuring good optical uniformity, in order to make it possible to present an illuminated sign effect on the steering wheel. Utility Model Content

[0007] The purpose of this invention is to provide a luminous marker light for a steering wheel to solve the problems mentioned in the background art. The luminous marker light for a steering wheel provided by this invention has the characteristic of achieving good optical uniformity within a relatively small space.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a luminous marker light for a steering wheel, comprising a base, a light source plate connected above the base, a light guide cover above the light source plate, a light shield embedded inside the upper surface of the light guide cover, the light-emitting area of ​​the light guide cover located outside the light shield cover being the light-emitting area, a highly reflective white paint layer coated on the circumference of the light guide cover, and the thickness from the light-emitting surface of the light guide cover to the base being 12.1mm ± 0.1mm.

[0009] To ensure optical uniformity, the light guide cover is further injection molded from a milky white scattering material.

[0010] To avoid stray light from reflections, the light-shielding cover is further injection molded from a low-reflectivity material.

[0011] To achieve the connection between the light shield and the light guide, the light guide has a placement groove on its light-emitting surface that corresponds to the light shield, and the placement groove contains several riveting grooves. The bottom surface of the light shield has a riveting block that corresponds to the riveting groove.

[0012] To achieve proper positioning of the light guide cover and the base, the base is further provided with several positioning grooves on its circumference, and the bottom surface of the light guide cover is provided with positioning blocks corresponding to the positioning grooves.

[0013] To facilitate assembly with the steering wheel, the bottom of the base and the bottom of the light guide cover are further provided with staggered base clips and light guide cover clips, respectively.

[0014] To achieve proper positioning of the light source board and the base, several positioning posts are provided on the top of the base, and positioning holes corresponding to the positioning posts are provided on the light source board.

[0015] To facilitate the passage of wires and ensure waterproof sealing, the base is further provided with a wire passage hole, and a wire plug is interference-fitted inside the wire passage hole.

[0016] To optimize the optical path, improve optical uniformity, and solve the problem of dark areas on the inner side of the light guide cover, a chamfer is further provided between the bottom edge of the placement groove and the corresponding outer sidewall of the light guide cover.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The thickness of the light guide cover from the light-emitting surface to the top surface of the base block is approximately 12.1mm. The thickness from the light-emitting surface to the light-incoming surface of the light guide cover is approximately 4mm. The distance from the light-emitting surface of the LED bead to the light-incoming surface of the light guide cover is approximately 2.5mm. The height of the LED bead and the thickness of the PCB board are approximately 3.1mm. The thickness from the top surface of the base to the top surface of the base block is approximately 2.5mm. Compared with the traditional solution, the thickness is reduced by 6-12mm, which reduces the occupation of longitudinal space and makes it possible to install luminous marker lights on the steering wheel.

[0019] 2. This utility model has a highly reflective white paint layer coated on the circumference of the light guide cover, which solves the problem of brightness difference between the periphery and the middle area of ​​the light guide cover. The non-light-emitting area of ​​the light guide cover is coated with a black paint layer, which works together with the highly reflective white paint layer to prevent light leakage, ensure that the light guide cover has a good visual boundary when the light source board is lit, and improve optical uniformity.

[0020] 3. The distance between the light-emitting surface of the LED beads and the light-inlet surface of the light guide cover in this utility model is about 2.5mm, which can ensure that the back of the light guide cover will not melt due to the high temperature generated by the LED beads lighting up, and at the same time improve the optical uniformity.

[0021] 4. The light guide cover of this utility model is injection molded from milky white scattering material, which can ensure the uniformity of optics;

[0022] 5. The light-shielding cover of this utility model is injection molded from a low-reflectivity material, which can avoid the generation of stray light from reflection;

[0023] 6. The base of this utility model is provided with a wire passage hole, and a wire plug is interference-fitted into the wire passage hole to achieve a sealed and waterproof wire passage hole;

[0024] 7. The bottom edge of the placement groove of this utility model is provided with a chamfer between the side wall of the corresponding light guide cover and the outside of the light guide cover. This can optimize the light path, improve optical uniformity, and solve the problem of dark areas on the inner side of the light guide cover. Attached Figure Description

[0025] Figure 1 This is an exploded view of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the base of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the light guide cover of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the light-shielding cover of this utility model;

[0029] Figure 5 This is a cross-sectional view of the light guide cover of this utility model.

[0030] Figure 6 This is a cross-sectional structural diagram of the present invention.

[0031] In the diagram: 1. Wire plug; 2. Base; 21. Positioning groove; 22. Base locking block; 23. Positioning post; 24. Wire hole; 3. Light source board; 4. Light shield; 41. Riveting block; 5. Light guide cover; 51. Light guide cover locking block; 52. Riveting groove; 53. Placement groove; 54. Positioning block; 55. High-reflective white paint layer; 56. Chamfer; 6. Screw. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] Please see Figures 1-6 This utility model provides the following technical solution: a luminous marker light for a steering wheel, including a base 2, a light source plate 3 locked above the base 2 by screws 6, the LED beads on the light source plate 3 are selected as large-angle surface luminous LED beads, the distribution of the LED beads corresponds to the luminous area of ​​the light guide cover 5, the light guide cover 5 is provided above the light source plate 3, the light guide cover 5 is embedded in the interior of the upper surface of the light guide cover 5, the light-emitting surface of the light guide cover 5 is located outside the light guide cover 4 as the luminous area, and the light is blocked by the light guide cover 4 to form a car mark, the circumference of the light guide cover 5 is coated with a high reflective white paint layer 55, the non-luminous area of ​​the light guide cover 5 (the bottom surface and side wall of the placement groove 53) is coated with a black paint layer, and the thickness from the light-emitting surface of the light guide cover 5 to the top surface of the base block 22 is 12.1±0.1mm.

[0035] By adopting the above technical solution, the thickness of the light guide cover 5 from the light-emitting surface to the top surface of the base block 22 is approximately 12.1 mm. Specifically, the thickness from the light-emitting surface to the light-receiving surface of the light guide cover 5 is approximately 4 mm, the distance from the light-emitting surface of the LED bead to the light-receiving surface of the light guide cover 5 is approximately 2.5 mm, the height of the LED bead and the thickness of the PCB board are approximately 3.1 mm, and the thickness from the top surface of the base 2 to the top surface of the base block 22 is approximately 2.5 mm. Compared to traditional solutions, this reduces the thickness by 6-12 mm, decreasing the occupation of longitudinal space and making it possible to install luminous marker lights on the steering wheel. The utility model features a highly reflective white paint layer 55 coated on the circumference of the light guide 5, which solves the problem of brightness difference between the periphery and the center area of ​​the light guide 5. The non-light-emitting area of ​​the light guide 5 is coated with a black paint layer, which works together with the highly reflective white paint layer 55 to prevent light leakage and ensure that the light guide 5 has a good visual boundary when the light source board 3 is lit, thus improving optical uniformity. The distance from the light-emitting surface of the LED beads of the light source board 3 to the light-inlet surface of the light guide 5 is about 2.5mm, which can ensure that the back of the light guide 5 will not melt due to the high temperature generated by the LED beads being lit, and at the same time improve optical uniformity.

[0036] Specifically, the light guide cover 5 is injection molded from a milky white scattering material, which is PC with grade PC-2407-021173.

[0037] By adopting the above technical solution, optical uniformity is ensured.

[0038] Specifically, the light-shielding cover 4 is injection molded from a low-reflectivity material, and the material is black PC.

[0039] By adopting the above technical solution, stray light generated by reflection can be avoided.

[0040] Specifically, the light-emitting surface of the light guide cover 5 is provided with a placement groove 53 corresponding to the light-shielding cover 4. The light-shielding cover 4 is placed in the placement groove 53. The placement groove 53 is provided with several riveting grooves 52. The bottom surface of the light-shielding cover 4 is provided with a riveting block 41 corresponding to the riveting groove 52. The height of the top surface of the light-shielding cover 4 is 1-2mm higher than the height of the light-incoming surface of the light guide cover 5, so that the light emission of the light guide cover 5 has a three-dimensional effect.

[0041] By adopting the above technical solution, the light shield 4 and the light guide 5 are connected by inserting the riveting block 41 into the riveting groove 52 and achieving connection by thermal riveting.

[0042] Specifically, the base 2 has several positioning grooves 21 on its circumference, and the bottom surface of the light guide cover 5 has positioning blocks 54 corresponding to the positioning grooves 21.

[0043] By adopting the above technical solution, the positioning block 54 and the positioning groove 21 are used to achieve the positioning of the light guide cover 5 and the base 2. The light guide cover 5 and the base 2 are connected by welding. The welding can be done by vibration friction welding or ultrasonic welding. In this embodiment, ultrasonic welding is preferred.

[0044] Specifically, the bottom of the base 2 and the bottom of the light guide cover 5 are respectively provided with a staggered base block 22 and a light guide cover block 51.

[0045] By adopting the above technical solution, the assembly with the steering wheel is achieved through the base clip 22 and the light guide clip 51.

[0046] Specifically, the base 2 has several positioning posts 23 on its upper part, and the light source plate 3 has positioning holes corresponding to the positioning posts 23.

[0047] By adopting the above technical solution, the positioning of the light source board 3 and the base 2 is achieved.

[0048] Example 2

[0049] The difference between this embodiment and embodiment 1 is that, specifically, the base 2 is provided with a wire hole 24, and a wire plug 1 is interference-fitted inside the wire hole 24, through which the wire of the light source board 3 passes.

[0050] By adopting the above technical solution, the wire hole 24 is sealed and waterproof.

[0051] Example 3

[0052] The difference between this embodiment and embodiment 1 is that, specifically, a chamfer 56 is provided between the bottom edge of the placement groove 53 and the side wall of the corresponding light guide cover 5.

[0053] By adopting the above technical solution, the optical path can be optimized, optical uniformity can be improved, and the problem of dark areas on the inner side of the light guide cover can be solved.

[0054] In summary, the thickness of the light guide cover 5 from its top surface to the top surface of the base block 22 is approximately 12.1 mm. The thickness of the light-emitting and light-receiving surfaces of the light guide cover 5 is approximately 4 mm. The distance from the light-emitting surface of the LED bead to the light-receiving surface of the light guide cover 5 is approximately 2.5 mm. The height of the LED bead and the thickness of the PCB board are approximately 3.1 mm. The thickness from the top surface of the base 2 to the top surface of the base block 22 is approximately 2.5 mm. Compared to traditional solutions, this reduces the thickness by 6-12 mm, decreasing the vertical space occupied and making it possible to install illuminated marker lights on the steering wheel. The light guide cover 5 has a highly reflective white paint layer 55 coated on its circumference, solving the brightness difference problem between the periphery and the center area. The non-light-emitting areas of the light guide cover 5 are coated with a black paint layer, which, together with the highly reflective white paint layer 55, prevents light leakage and ensures that the light guide cover is illuminated when the light source board 3 is lit. 5. It has good visual boundaries and improves optical uniformity; the distance from the light-emitting surface of the LED beads of the light source plate 3 to the light-inlet surface of the light guide cover 5 is about 2.5mm, which can ensure that the back of the light guide cover 5 will not melt due to the high temperature generated by the LED beads, and at the same time improve the optical uniformity; the light guide cover 5 of this invention is injection molded from milky white scattering material, which can ensure optical uniformity; the light shield 4 of this invention is injection molded from low reflectivity material, which can avoid the generation of stray light from reflection; the base 2 of this invention is provided with a wire hole 24, and a wire plug 1 is interference-fitted in the wire hole 24, which can achieve the sealing and waterproofing of the wire hole 24; the bottom edge of the placement groove 53 of this invention is provided with a chamfer 56 between the corresponding outer side wall of the light guide cover 5, which can optimize the light path, improve optical uniformity, and solve the problem of dark areas on the inner side of the light guide cover 5.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lighted emblem for a steering wheel, characterized by: The base is provided with a light source plate, a light guide cover is arranged above the light source plate, a light shielding cover is embedded in the upper surface of the light guide cover, the light emitting surface of the light guide cover is the light emitting area outside the light shielding cover, a high reflective white paint layer is coated on the circumference of the light guide cover, and the thickness from the light emitting surface of the light guide cover to the base is 12.1mm±0.1mm.

2. A lighted emblem for a steering wheel as defined in claim 1, wherein: The light guide cover is injection molded by a milky white scattering material.

3. A lighted emblem for a steering wheel as defined in claim 1, wherein: The light shielding cover is injection molded by a low reflectivity material.

4. A lighted emblem for a steering wheel as defined in claim 1, wherein: The light emitting surface of the light guide cover is provided with a placing groove corresponding to the light shielding cover, a plurality of riveting grooves are arranged in the placing groove, and a riveting block corresponding to the riveting groove is arranged on the bottom surface of the light shielding cover.

5. A lighted emblem for a steering wheel as defined in claim 1, wherein: A plurality of positioning grooves are arranged on the circumference of the base, and a positioning block corresponding to the positioning groove is arranged on the bottom surface of the light guide cover.

6. A lighted emblem for a steering wheel as defined in claim 1, wherein: The bottom of the base and the bottom of the light guide cover are respectively provided with staggered base clamping blocks and light guide cover clamping blocks.

7. A lighted emblem for a steering wheel as defined in claim 1, wherein: A plurality of positioning columns are arranged above the base, and a positioning hole corresponding to the positioning column is arranged on the light source plate.

8. A lighted emblem for a steering wheel as defined in claim 1, wherein: A wire passing hole is arranged on the base, and a wire plug is tightly fitted in the wire passing hole.

9. A lighted emblem for a steering wheel as defined in claim 4, wherein: A cutting corner is arranged between the bottom edge of the placing groove and the sidewall corresponding to the outside of the light guide cover.

10. A lighted emblem for a steering wheel as defined in claim 1, wherein: The LED lamp beads on the light source plate are large-angle surface light emitting LED lamp beads, and the distribution of the LED lamp beads corresponds to the light emitting area of the light guide cover.

Images