A new light guide structure for vehicle lamps

Abstract

The utility model discloses a novel light guide structure for car light relates to car light technical field, including light guide department, light guide auxiliary support frame, LED light source, light guide support, light guide front cover, the utility model discloses through incident light collimator and compresses into small angle with LED large angle light, again through incident light guide board and imports light guide main part, promotes the coupling rate, thereby reduces the LED number, reduces the power consumption, the light -emitting uniformity improves, and the thickness reduces, and the assembly parts reduce the positioning accuracy promotion, and the LED light source passes through the fin supplementary installation and is in line with incident light collimator, avoids the vibration displacement, and the LED light source passes through the fin and the support and the lamp shell are buckled and form the heat bridge through the mounting bracket, and the heat can be exported fast, and the light guide main part no longer bears the fastening force, and the thermal expansion and cold shrink deformation amount are absorbed by the support, and the utility model discloses above all, the utility model discloses in the light efficiency, simplifies the assembly, reduces the thickness and improves the reliability aspect and is superior to prior art obviously, has good industrialization prospect.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, specifically a novel light guide structure for automotive lighting. Background Technology

[0002] With the widespread application of LED light sources in automotive lighting, thinner, more uniform, and lower-energy-consumption light guide solutions have become mainstream. Existing technologies generally employ the following two solutions:

[0003] Direct-lit light guide: LEDs face the light-emitting surface and the light is evenly distributed through a diffuser or dot matrix, but it is thick, has a large number of LEDs, and is expensive.

[0004] Side-entry light guide: LEDs are arranged on the end face of the light guide, and the light is guided to the light-emitting surface through total internal reflection. Serrations or dots are set on the back side to disrupt total internal reflection and achieve uniform light emission. However, existing side-entry technologies have the following drawbacks:

[0005] 1. The light guide body is often fixed to the bracket and mask by screws or hot riveting. There are many parts, the assembly process is complicated, the tolerance chain is long, and bright spots or dark areas are easy to appear.

[0006] 2. The LED light source, light guide, bracket, and mask are all separate components, resulting in a large cumulative positioning error. When the vehicle vibrates, relative displacement can easily occur between the light guide and the LED, leading to brightness decay or localized overheating, resulting in poor reliability.

[0007] Therefore, there is an urgent need for a new type of light guide structure that has high coupling efficiency, is easy to assemble, produces uniform light, and is thin. Utility Model Content

[0008] The purpose of this utility model is to provide a novel light guide structure for vehicle lights, in order to solve the defects of the existing direct-lit vehicle light guides mentioned in the background art, such as large thickness, large number of LEDs, and high cost, as well as the problems of side-lit vehicle light guides having small incident end face, easy bright spots or dark areas between the light guide body and the bracket and mask, and poor reliability due to structural vibration.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a novel light guide structure for automotive lights, comprising a light guide portion installed inside a light guide bracket, a light guide front cover disposed outside the light guide portion, a light guide auxiliary support frame disposed on the side of the light guide portion outside the light guide bracket, and an LED light source disposed outside the light guide auxiliary support frame; the light guide portion comprises a sheet-like light guide body, the light guide body being triangular or polygonal, with an incident light guide plate extending outward on one side, an incident light collimator disposed at the end of the incident light guide plate, and a plurality of total internal reflection sawtooth prisms uniformly disposed on the side of the light guide body forming an angle with the light emission direction of the incident light guide plate, the rear side of the light guide body being arranged in a matrix. The light guide plate has multiple recessed spherical total internal reflection surfaces; an auxiliary support frame for the light guide is provided on the outside of the incident light collimator, and an LED light source is provided on the outside of the auxiliary support frame; the auxiliary support frame includes a mounting plate and is sleeved on the outside of the incident light guide plate, and an LED light source is provided on the outside of the incident light guide plate; the LED light source includes a circuit board and has LED beads on the side near the light guide part; the light guide bracket includes a light guide bracket body and a body flange that is perpendicular to and surrounds the light guide body on its front side; the front cover of the light guide includes a front cover body, and the front cover body has a front cover flange near the edge on the side near the light guide part; the front cover flange has a notch at the position corresponding to the incident light guide plate.

[0010] Preferably, the side of the light guide body is provided with one or more body-shaped grooves extending outward, and one or more body supports extending outward.

[0011] Preferably, the incident light collimator includes incident light total internal reflection surfaces inclined towards the center, which are arranged on both sides of the incident light guide plate. A rectangular notch is provided at the middle position of the two incident light total internal reflection surfaces, and an incident light surface protruding outward is provided at the middle of the rectangular notch.

[0012] Preferably, the front side of the mounting bracket plate is provided with a mounting bracket buckle that is snapped into place with the lamp housing.

[0013] Preferably, the optical guide bracket body has an optical guide bracket positioning block that is fixed to the main body groove on one side near the optical guide body, and positioning blocks are provided on both sides of the main body support ear.

[0014] Preferably, the front cover fold has a notch at the position corresponding to the main body support ear.

[0015] Preferably, the main body folded edge is provided with multiple light guide bracket buckles; the front cover folded edge is provided with a front cover locking block at the corresponding position of the light guide bracket buckle, and the light guide bracket and the light guide front cover are fixed by the light guide bracket buckle and the front cover locking block.

[0016] Preferably, the front cover body has a plurality of front cover top blocks that are close to the front cover folded edge on the inner side of the front cover body.

[0017] Preferably, the light emitted from the LED light source at multiple angles is collimated by the incident light collimator and becomes parallel incident light. This light is then guided by the incident light guide plate to the sawtooth prism with total internal reflection. The total internal reflection light from the sawtooth prism enters the interior of the light guide body and is then reflected by the spherical total internal reflection surface and the total internal reflection surface on the rear side of the light guide body before being emitted from the light-emitting surface on the front side of the light guide body.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. Improved light energy utilization: The incident light collimator compresses the large-angle light from the LED into a small angle, and then guides it into the light guide body through the incident light guide plate, thereby improving the coupling rate; thus reducing the number of LEDs and reducing power consumption;

[0020] 2. Improved light emission uniformity and reduced thickness: The back of the light guide body is equipped with a matrix of spherical total internal reflection surfaces, which can accurately reflect the collimated light beam forward. Combined with the sawtooth prisms with total internal reflection on the side wall, the brightness and light emission uniformity of the light guide are improved.

[0021] 3. 50% reduction in assembly parts and improved positioning accuracy: The light guide bracket and the front cover of the light guide are connected by snap-fit. The lower snap-fit ​​of the light guide bracket and the arc edge snap-fit ​​are snapped into place with the front cover block in one go, eliminating the need for screws;

[0022] 4. The LED light source is installed with the assistance of a heat sink, and the gap tolerance between the LED and the light guide end face is controllable, avoiding vibration and displacement;

[0023] In summary, this invention is significantly superior to existing technologies in terms of improving light efficiency, simplifying assembly, reducing thickness, and enhancing reliability, and has good prospects for industrialization. Attached Figure Description

[0024] Figure 1 This is the front view of the present utility model;

[0025] Figure 2 Front view of the light guide section;

[0026] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0027] Figure 4 Rear view of the light guide section;

[0028] Figure 5 Schematic diagram of the light guide section, light guide auxiliary support frame, and circuit board;

[0029] Figure 6 for Figure 5 A sectional view;

[0030] Figure 7 This is the front view of the optical guide bracket;

[0031] Figure 8 for Figure 7 Rear view;

[0032] Figure 9 This is a rear view of the front cover of the light guide;

[0033] Figure 10 for Figure 9 Main view;

[0034] Figure 11 This is a schematic diagram of the optical path;

[0035] In the diagram: Light guide section-1, light guide body-11, incident light guide plate-12, incident light collimator-13, incident light total internal reflection surface-131, rectangular notch-132, incident light surface-133, body groove-14, body support lug-15, total internal reflection sawtooth prism-17, spherical total internal reflection surface-18, light emitting surface-19, light guide auxiliary support frame-2, mounting bracket plate-21, mounting bracket buckle-22, LED light source-3, circuit board-31, LED lamp bead-32, light guide bracket-4, light guide bracket body-41, body horizontal fold-edge-42, light guide bracket lower buckle-43, light guide bracket positioning block-44, positioning stop-block-45, light guide front cover-5, front cover body-51, front cover fold-edge-52, front cover clip-53, front cover top block-54. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Please refer to Figure 1-11 , Figure 1 This is the front view of the present utility model; Figure 2 Front view of the light guide section; Figure 3 for Figure 2 Enlarged view of A in the middle; Figure 4 Rear view of the light guide section; Figure 5 Schematic diagram of the light guide section, light guide auxiliary support frame, and circuit board; Figure 6 for Figure 5 A sectional view; Figure 7 This is the front view of the optical guide bracket; Figure 8 for Figure 7 Rear view; Figure 9 This is a rear view of the front cover of the light guide; Figure 10 for Figure 9 Main view; Figure 11 This is a schematic diagram of the optical path.

[0038] This utility model provides a novel light guide structure for vehicle lights, including a light guide part 1, which is installed on the inner side of a light guide bracket 4. At the same time, a light guide front cover 5 is clamped on the light guide bracket 4 and placed on the outer side of the light guide part 1. A light guide auxiliary support frame 2 is provided on the side of the light guide part 1 on the outer side of the light guide bracket 4, and an LED light source 3 is provided on the outer side of the light guide auxiliary support frame 2.

[0039] The light guide unit 1 includes a light guide body 11 arranged in a sheet shape. The light guide body 11 is triangular or polygonal, and an incident light guide plate 12 extending outward is provided on one side. An incident light collimator 13 is provided at the end of the incident light guide plate 12. A plurality of total internal reflection sawtooth prisms 17 are evenly arranged on the side of the light guide body 11 that forms an angle with the light output direction of the incident light guide plate 12. A light guide auxiliary support frame 2 is provided on the outside of the incident light collimator 13, and an LED light source 3 is provided on the outside of the light guide auxiliary support frame 2.

[0040] The light guide body 11 is provided with one or more body-shaped grooves 14 extending outwards on its side, and one or more body-shaped lugs 15 extending outwards.

[0041] The light guide body 11 has a plurality of total internal reflection sawtooth prisms 17 evenly arranged on the side that forms an angle with the light output direction of the incident light guide plate 12. Parallel light rays entering through the incident light guide plate 12 are reflected by the plurality of total internal reflection sawtooth prisms 17 and then enter the main body of the light guide body 11.

[0042] The rear side of the light guide body 11 is a total internal reflection surface and has multiple recessed spherical total internal reflection surfaces 18 arranged in a matrix. The light reflected by the multiple total internal reflection sawtooth prisms 17 is further reflected by the multiple spherical total internal reflection surfaces 18, making the front side of the light guide body 11 appear bright.

[0043] The incident light collimator 13 includes incident light total internal reflection surfaces 131 inclined towards the middle on both sides of the incident light guide plate 12, a rectangular notch 132 is provided at the middle position of the two incident light total internal reflection surfaces 131, and an incident light surface 133 protruding outward is provided at the middle of the rectangular notch 132.

[0044] The light guide auxiliary support frame 2 includes a mounting bracket plate 21 sleeved on the outside of the incident light guide plate, and an LED light source 3 is provided on the outside of the mounting bracket plate 21; a mounting bracket buckle 22 is provided on the front side of the mounting bracket plate 21 for fastening and connecting with the lamp housing.

[0045] The LED light source 3 includes a circuit board 31, on which LED beads 32 are disposed. The LED light source 3 is mounted with the assistance of a heat sink, and the LED beads 32 are placed in front of the incident light collimator 13, so that as much light as possible can pass through the incident light collimator 13.

[0046] The light guide bracket 4 includes a light guide bracket body 41. A body flange 42, perpendicular to and surrounding the light guide body 11, is provided on the front side of the light guide bracket body 41. A light guide bracket buckle 43 is provided on the body flange 42. A light guide bracket positioning block 44, which is fixed to the body groove 14, is provided on the side of the light guide bracket body 41 near the light guide body 11. Positioning blocks 45 are provided on both sides of the body lug 15 to position and install the light guide body 11. The front light guide 5 is fixed by the light guide bracket buckle 43.

[0047] The light guide front cover 5 includes a front cover body 51. The front cover body 51 has a front cover flange 52 near the edge on the side close to the light guide part 1. The front cover flange 52 has notches at positions corresponding to the incident light guide plate 12 and the main body support 15. The front cover flange 52 has front cover latches 53 at positions corresponding to the lower latch 43 and the arc edge latch 47 of the light guide bracket, so that the light guide bracket 4 and the light guide front cover 5 can be connected as a whole. The front cover body 51 has a plurality of front cover top blocks 54 close to the front cover flange 52 on the inner side of the front cover flange 52, which are used to assist in tightening and fixing the light guide part 1.

[0048] In use, the light emitted from the LED light source 3 at multiple angles is transformed into parallel incident light after passing through the incident light collimator 13. This light is then guided through the incident light guide plate 12 to the total internal reflection sawtooth prism 17. The total internal reflection light from the sawtooth prism 17 enters the interior of the light guide body 11 and is then emitted from the light-emitting surface 19 on the front side of the light guide body 11 after total internal reflection by the spherical total internal reflection surface 18 and the total internal reflection surface on the rear side.

[0049] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A novel light guide structure for automotive lights, characterized in that: The light guide includes a light guide portion (1) installed inside a light guide bracket (4). A light guide front cover (5) is fitted onto the outside of the light guide portion (1). A light guide auxiliary support frame (2) is provided on the side of the light guide portion (1) outside the light guide bracket (4), and an LED light source (3) is provided on the outside of the light guide auxiliary support frame (2). The light guide portion (1) includes a sheet-like light guide body (11), which is triangular or polygonal. An incident light guide plate (12) extending outward is provided on one side. An incident light collimator (13) is provided at the end of the incident light guide plate (12). Multiple total internal reflection sawtooth prisms (17) are uniformly arranged on the side of the light guide body (11) at an angle to the light output direction of the incident light guide plate (12). The rear side of the light guide body (11) is a total internal reflection surface and multiple concave spherical total internal reflection surfaces (18) are arranged in a matrix. The front side of the light guide body (11) is... The light-emitting surface (19) is provided with a light guide auxiliary support frame (2) on the outside of the incident light collimator (13), and an LED light source (3) is provided on the outside of the light guide auxiliary support frame (2); the light guide auxiliary support frame (2) includes a mounting plate (21) and is sleeved on the outside of the incident light guide plate (12), and an LED light source (3) is provided on the outside of the incident light guide plate (12); the LED light source (3) includes a circuit board (31) and is located on the side of the light guide part (1). LED beads (32) are provided; the light guide bracket (4) includes a light guide bracket body (41) and a body flange (42) that is perpendicular to and surrounds the light guide body (11) on its front side; the light guide front cover (5) includes a front cover body (51), and the front cover body (51) has a front cover flange (52) near the edge on the side close to the light guide part (1); the front cover flange (52) has a notch at the position corresponding to the incident light guide plate (12).

2. The novel light guide structure for automotive lights according to claim 1, characterized in that: The light guide body (11) is provided with one or more body-shaped grooves (14) extending outward and one or more body-shaped lugs (15) extending outward at its side.

3. The novel light guide structure for vehicle lights according to claim 2, characterized in that: The incident light collimator (13) includes incident light total internal reflection surfaces (131) inclined toward the middle on both sides of the incident light guide plate (12), a rectangular notch (132) is provided at the middle position of the two incident light total internal reflection surfaces (131), and an incident light surface (133) protruding outward is provided at the middle of the rectangular notch (132).

4. The novel light guide structure for vehicle lights according to claim 3, characterized in that: The mounting bracket plate (21) is provided with a mounting bracket buckle (22) for fastening and connecting with the lamp housing at the front side.

5. The novel light guide structure for automotive lights according to claim 4, characterized in that: The optical guide bracket body (41) has an optical guide bracket positioning block (44) that is fixed to the main body groove (14) on one side near the optical guide body (11), and positioning blocks (45) on both sides of the main body support ear (15).

6. The novel light guide structure for automotive lights according to claim 5, characterized in that: The front cover fold (52) has a notch at the corresponding position of the main body support (15).

7. The novel light guide structure for vehicle lights according to claim 6, characterized in that: The main body fold (42) is provided with a plurality of light guide bracket buckles (43); the front cover fold (52) is provided with a front cover block (53) at the corresponding position of the light guide bracket buckle (43), and the light guide bracket (4) and the light guide front cover (5) are fixed by the light guide bracket buckle (43) and the front cover block (53).

8. The novel light guide structure for automotive lights according to claim 7, characterized in that: The front cover body (51) has a plurality of front cover top blocks (54) that are close to the front cover fold (52) on the inner side of the front cover fold (52).

9. The novel light guide structure for automotive lights according to claim 8, characterized in that: The light emitted from the LED light source (3) at multiple angles becomes parallel incident light after passing through the incident light collimator (13). It is then transmitted through the incident light guide plate (12) to the total internal reflection sawtooth prism (17). The total internal reflection light from the sawtooth prism (17) enters the interior of the light guide body (11) and is emitted from the light-emitting surface (19) on the front side of the light guide body (11) after total internal reflection by the spherical total internal reflection surface (18) and the total internal reflection surface on the rear side.

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