Light guide structure of vehicle lamp
By introducing inclined surfaces and reflective layers into the light guide structure of the car, the tail highlights problem is solved, reducing light overflow and improving light efficiency.
Patent Information
- Application Number
- CN202420453720.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-08
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-08
AI Technical Summary
The existing automotive light guide structures are prone to bright spots at the tail, causing light to overflow and affecting the lighting effect.
A light guide structure for vehicle headlights is designed, using the main reflective surface composed of inclined surface 1 and inclined surface 2, and a reflective layer is set at the tail, and the inclined surface 2 is used to reflect the incoming light, reducing the overflow of light and improving the Light effect.
By improving the highlights of the tail of the car light guide, the light overflow is reduced and the lighting effect is improved.
Smart Images
Figure CN222256195U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile light guides, in particular to a light guide structure for a vehicle lamp. Background Art
[0002] The development of the automobile industry has promoted the development of headlights. Headlights are safety and regulatory parts of automobiles, and they are also very important appearance parts. In the past few decades, the rapid development of the automobile industry has put forward high requirements on the appearance and lighting performance of headlights. In order to meet these requirements, headlights also need to adopt new design structures to achieve them. Light guides are structural parts that guide the light emitted by LEDs to the front panel or the position where you want to emit light.
[0003] In the existing light guide application technology, a light guide device with an LED light source is used at one end. The light guide uses the reflection and total reflection of light to achieve the light emission form. The light emission principle is: the incident light encounters the inclined surface of the light guide tooth and is totally reflected, refracted on the surface of the light guide, and hits the light guide to achieve light emission.
[0004] In the above-mentioned existing light guide applications, when the light does not undergo total reflection, the light will pass through the light guide as the end point of the light reflection in the light guide. In this way, a bright spot will generally be formed at the end of the light guide, resulting in the defect of a tail bright spot. Some designers have weakened the tail bright spot through various styles (such as a tail fisheye pattern), but the effect is not good. For this reason, a light guide structure for a vehicle lamp is proposed. Utility Model Content
[0005] Based on the above description, the utility model provides a light guide structure for a vehicle lamp, which solves the technical problem of bright spots at the tail of the automobile light guide.
[0006] The utility model solves the above technical problems with the following technical solutions: A light guide structure for a vehicle lamp, applied in a vehicle lamp, comprises a light guide for a vehicle lamp, the light guide for a vehicle lamp having a light entry surface, a light exit surface and at least one set of main reflection surfaces, the main reflection surfaces comprising a first inclined surface and a second inclined surface, and the tail of the light guide for a vehicle lamp is at least provided with a reflection layer;
[0007] Among them, the first slope is inclined toward the light entry surface and the light exit surface, and the second slope is inclined toward the reflective layer and the light exit surface. There is an angle between the first slope and the second slope, and part of the light directed to the reflective layer is reflected by the second slope and guided away from the light exit surface.
[0008] On the basis of the above technical solution, the present invention can also be improved as follows.
[0009] Furthermore, the reflective layer is one of an acrylic resin paint layer and a reflective film layer, and is used to reflect the light directed toward the reflective layer.
[0010] Furthermore, the reflective layer is a silver glue layer, and the light directed toward the reflective layer is reflected by the silver glue. Black glue is provided on the side of the reflective layer away from the light guide of the car light to block light.
[0011] Furthermore, it also includes a clamping frame and a glue-applying frame, the clamping frame is arranged at the rear end of the car light guide, the clamping frame has a clamping cavity, the car light guide is detachably connected in the clamping cavity, the glue-applying frame is detachably connected to the clamping frame, and the reflective layer is arranged on one side of the glue-applying frame and is located at the rear end of the car light guide.
[0012] Furthermore, the glue rack includes a glue plate and a limiting plate, the reflective layer is arranged on one side of the glue plate, an interlayer is formed between the glue plate and the limiting plate, and at least one group of elastic bars connected to the limiting plate are arranged in the interlayer, and the elastic bars, the glue plate and the limiting plate are integrally connected.
[0013] Furthermore, the elastic strips, the adhesive plates and the limiting plates are made of thermoplastic plastics.
[0014] Furthermore, a bolt hole is provided on the clamping frame, a bolt is threadedly connected to the bolt hole, and the headlight guide is locked in the clamping cavity by the bolt.
[0015] Furthermore, two groups of rubber gaskets are arranged in the clamping cavity, and the two groups of rubber gaskets are attached to both sides of the headlight guide to reduce the clamping damage to the headlight guide.
[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0017] The light guide structure of the vehicle lamp uses a reflective layer to reflect the light directed to the reflective layer, and uses a second inclined surface for reflection, thereby improving the bright spot defect of the tail of the lamp guide, reducing light spillage, and improving light efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the structure of the light passing through the inclined plane 1 in the embodiment of the utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model installed behind the light guide bracket;
[0020] Figure 3 for Figure 2 Explosion diagram of
[0021] Figure 4 This is a schematic diagram of the structure of the clamping frame in the embodiment of the utility model;
[0022] Figure 5 for Figure 3 A partial enlarged schematic diagram of area A in the middle.
[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0024] 1. Car light guide; 11. Light entry surface; 12. Light exit surface; 13. Main reflection surface; 131. Inclined surface one; 132. Inclined surface two; 2. Reflection layer; 3. Black glue; 4. Clamping frame; 5. Light guide bracket; 6. Glue sticking frame; 61. Glue sticking board; 62. Limiting plate; 63. Interlayer; 64. Elastic strip; 7. Rubber gasket. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0026] like Figure 1 As shown, a light guide structure of a vehicle lamp in this embodiment is applied in a vehicle lamp, and includes a light guide 1, wherein the light guide 1 has a light entry surface 11, a light exit surface 12 and at least one set of main reflection surfaces 13. For further description, as shown in FIG. Figure 1 As shown, the left side of the car light guide 1 is the light entry surface 11, the top of the car light guide 1 is the light exit surface 12, the right side of the car light guide 1 is the tail of the car light guide 1, and the main reflection surface 13 is the bottom of the car light guide 1. This application mainly aims to improve the problem of bright spots appearing at the tail of the car light guide 1.
[0027] Specifically, Figure 1 As shown, the main reflecting surface 13 includes an inclined plane 131 and an inclined plane 132. The inclined plane 131 and the inclined plane 132 are adjacent to each other and have a boundary line. The inclined plane 131 is an existing design for reflecting most of the light, and the inclined plane 132 is one of the improved designs. In addition, as an improvement of another part of the light guide structure of the vehicle lamp, at least a reflecting layer 2 is provided at the tail of the light guide 1 of the vehicle lamp. The reflecting layer 2 is made of a reflecting material and is used to reflect part of the light incident on the light guide 1 of the vehicle lamp, and directly reflects part of the light to the light emitting surface 12, and reflects part of the light to the inclined plane 132. In this way, the inclined plane 132 reflects the light again and emits it to the light emitting surface 12, thereby improving the technical problem of the bright spot at the tail of the vehicle lamp guide 1, and can reduce the light spillage, thereby improving the light efficiency.
[0028] To further explain, the first inclined surface 131 is inclined toward the light entry surface 11 and the light exit surface 12 , and the second inclined surface 132 is inclined toward the reflective layer 2 and the light exit surface 12 .
[0029] It can be understood that the headlight guide 1 is not limited to a sheet shape, but may also be a circular or irregular shape.
[0030] After the light enters the light entry surface 11, part of the light is reflected and guided by the main reflection surface 13 to leave the light exit surface 12, and part of the light directed to the reflection layer 2 directly leaves the light exit surface 12 through the reflection layer 2. There is an angle between the first slope 131 and the second slope 132, so that part of the light directed to the reflection layer 2 is reflected and guided by the second slope 132 to leave the light exit surface 12.
[0031] As a preferred solution of this embodiment, the reflective layer 2 is a silver glue layer, and the light directed toward the reflective layer 2 is reflected by the silver glue. Black glue 3 is provided on the side of the reflective layer 2 away from the headlight guide 1 for shielding.
[0032] Of course, it is understandable that, in some embodiments, the reflective layer 2 is, for example, an acrylic resin paint layer or a reflective film layer, which is used to reflect the light directed toward the reflective layer 2 .
[0033] Considering that the reflective layer 2 may fall off when it is a silver glue layer, the silver glue layer needs to be filled. Figure 2-5 As shown, the light guide 1 of the vehicle light is in the shape of a sheet. The light guide structure of the vehicle light also includes a clamping frame 4 and a glue frame 6, and it is necessary to ensure that the clamping frame 4 is arranged at the tail of the light guide 1. The clamping frame 4 has four faces. In addition, the clamping frame 4 has a clamping cavity, the opening of the clamping cavity faces the light guide 1, and the opening has an arc extending toward its upper and lower sides, so as to reduce the wear of the light guide 1 when it is assembled on the clamping frame 4. In addition, the light guide 1 can be detachably connected in the clamping cavity, and the glue frame 6 can be detachably connected to the clamping frame 4. Preferably, the reflective layer 2 is arranged on one side of the glue frame 6, and the arrangement method is, for example, spraying or pasting, but it is necessary to ensure that it is located at the tail of the light guide 1, so that the reflective layer 2 can complete the reflection of the light, so as to improve the technical problem of the bright spot at the tail of the light guide 1, and can reduce the spillage of light, thereby improving the light effect.
[0034] In addition, the light guide structure of the vehicle lamp further includes a light guide bracket 5 , and the clamping frame 4 is fixed on the light guide bracket 5 by bolts.
[0035] To facilitate understanding of the detachable relationship between the adhesive sticking frame 6 and the clamping frame 4, further explanation is given as follows: Figure 3-4 As shown, the glue frame 6 includes a glue plate 61 and a limiting plate 62. The reflective layer 2 is sprayed or pasted on one side of the glue plate 61. An interlayer 63 is formed between the glue plate 61 and the limiting plate 62. At least one group of elastic bars 64 connected to the limiting plate 62 are arranged in the interlayer 63. The elastic bars 64, the glue plate 61 and the limiting plate 62 are integrally connected.
[0036] It should be noted that the spring bar 64 can be elastically deformed in the direction of the limit plate 62, and the adhesive plate 61 and the limit plate 62 are inserted into the clamping frame 4 through the spring bar 64. Further explanation: the spring bar 64, the adhesive plate 61 and the limit plate 62 are made of thermoplastic plastics, for example, they are made of general-purpose plastics such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, acrylonitrile-butadiene-styrene, or other thermoplastic materials with high elasticity.
[0037] During use, when the reflective layer 2 is, for example, a silver glue layer and it falls off, when a bright spot appears at the tail, it indicates that the silver glue layer has fallen off. Since the reflective layer 2 is sprayed or pasted on one side of the glue plate 61, and the glue frame 6 is inserted on the clamping frame 4 through the elastic strip 64, it can provide convenience for the disassembly and assembly of the glue frame 6. The worker only needs to re-paste or spray the glue plate 61 on the glue frame 6. In this way, it can provide convenience for the maintenance of the silver glue layer. The sprayed glue plate 61 is relative to the tail of the sprayed car light guide 1. The sprayed silver glue will not contact the sprayed car light guide 1 during spraying, and the silver glue will not be sprayed on the light emitting surface 12, so it will not affect the light guiding of the car light guide 1.
[0038] In addition, in order to facilitate understanding of how the headlight guide 1 is detachably connected to the clamping cavity, further description is given here. Figure 3 and 4 As shown, a bolt hole is provided on the clamping frame 4, a bolt is threadedly connected to the bolt hole, and the headlight guide 1 is locked in the clamping cavity by the bolt.
[0039] It should be noted that if Figure 4 As shown, two groups of rubber gaskets 7 are arranged in the clamping cavity, and the two groups of rubber gaskets 7 are attached to both sides of the headlight guide 1 to reduce the clamping damage to the headlight guide 1 .
[0040] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.
Claims
1. A light guide structure for a vehicle lamp, applied in a vehicle lamp, comprising a light guide (1), wherein the light guide (1) has a light entry surface (11), a light exit surface (12) and at least one set of main reflection surfaces (13), characterized in that: The main reflection surface (13) comprises a first inclined surface (131) and a second inclined surface (132), and the tail portion of the vehicle light guide (1) is at least provided with a reflection layer (2); The first inclined plane (131) is inclined toward the light entry surface (11) and the light exit surface (12), and the second inclined plane (132) is inclined toward the reflective layer (2) and the light exit surface (12). There is an included angle between the first inclined plane (131) and the second inclined plane (132), and part of the light directed toward the reflective layer (2) is reflected by the second inclined plane (132) and guided away from the light exit surface (12).
2. The light guide structure of a vehicle lamp according to claim 1, characterized in that: The reflective layer (2) is an acrylic resin paint layer or a reflective film layer, and is used to reflect light directed toward the reflective layer (2).
3. The light guide structure of a vehicle lamp according to claim 1, characterized in that: The reflective layer (2) is a silver glue layer, and light directed toward the reflective layer (2) is reflected by the silver glue. Black glue (3) is provided on the side of the reflective layer (2) away from the headlight guide (1) to block light.
4. A light guide structure for a vehicle lamp according to any one of claims 1 to 3, characterized in that: The invention also comprises a clamping frame (4) and a glue sticking frame (6), wherein the clamping frame (4) is arranged at the rear of the headlight guide (1), the clamping frame (4) has a clamping cavity, the headlight guide (1) is detachably connected in the clamping cavity, the glue sticking frame (6) is detachably connected to the clamping frame (4), and the reflective layer (2) is arranged on one side of the glue sticking frame (6) and is located at the rear of the headlight guide (1).
5. The light guide structure of a vehicle lamp according to claim 4, characterized in that: The adhesive bonding frame (6) comprises an adhesive bonding plate (61) and a limiting plate (62); the reflective layer (2) is arranged on one side of the adhesive bonding plate (61); an interlayer (63) is formed between the adhesive bonding plate (61) and the limiting plate (62); at least one group of elastic bars (64) connected to the limiting plate (62) are arranged in the interlayer (63); the elastic bars (64), the adhesive bonding plate (61) and the limiting plate (62) are integrally connected.
6. The light guide structure of a vehicle lamp according to claim 5, characterized in that: The elastic strip (64), the adhesive plate (61) and the limiting plate (62) are made of thermoplastic plastic.
7. The light guide structure of a vehicle lamp according to claim 6, characterized in that: The clamping frame (4) is provided with a bolt hole, a bolt is threadedly connected to the bolt hole, and the headlight guide (1) is locked in the clamping cavity by the bolt.
8. The light guide structure of a vehicle lamp according to claim 7, characterized in that: Two groups of rubber gaskets (7) are arranged in the clamping cavity, and the two groups of rubber gaskets (7) are attached to two sides of the headlight guide (1) to reduce clamping damage to the headlight guide (1).