Light guide and light guide system

Abstract

The utility model relates to a light guide and a light guide system, the light guide comprises a main body extending along the length direction, one side of the main body is provided with a concave part extending along the length direction, the concave part comprises a tooth groove positioned in the middle and two concave part surfaces respectively positioned on two sides of the tooth groove, and light guide teeth are arranged in the tooth groove at intervals; the cross sections of the two concave part faces are in an inwards-concave arc shape, the cross section of the outer side wall of the main body is in an arc shape with the angle larger than 180 degrees, the inwards-concave concave part is adopted to replace a protruding part in the prior art, the design of the two concave part faces retains a light guide cambered surface structure, internal light rays are effectively diffused, and the light guide effect is improved. Wherein compared with a circular light guide, the concave part surface and the tooth grooves can reduce the ramming cost, and as the light guide teeth are positioned in the tooth grooves, when the light guide deforms, the light guide teeth can be effectively protected, the light guide teeth are prevented from being in contact with an external structure, and the occurrence of bright spots during lighting is reduced or even avoided.

Description

Technical Field

[0001] The utility model relates to a light guide optimization design of a vehicle lamp, in particular to a light guide and a light guide system. Background Art

[0002] As a light-emitting technology, the diameter of the light guide is usually between 5mm and 10mm, and the length varies. Figure 1 The circular light guide 10 shown in the figure, however, in certain circumstances, the lighting uniformity thereof cannot achieve satisfactory results, so a special-shaped light guide, also known as a convex light guide 20, is gradually derived, and its cross-sectional shape is as follows Figure 2 Although the convex light guide 20 can effectively solve the lighting uniformity problem, due to the cylindrical structure characteristics of the light guide, such as Figure 3 As shown, the light guide teeth 21 are exposed to the outside, and during the installation process with the light guide bracket 22, the light guide deformation often occurs, resulting in a zero contact phenomenon between the light guide teeth 21 and the light guide bracket 22, resulting in a bright spot problem of the zero contact part.

[0003] Therefore, it is necessary to provide a new light guide structure. Utility Model Content

[0004] Based on the above description, the utility model provides a light guide to solve the technical problem in the prior art that when the light guide teeth protrude externally, the light guide is deformed, and there is a zero contact phenomenon between the light guide teeth and the light guide bracket, resulting in bright spots in the zero contact part.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A light guide comprises a main body extending in a length direction, one side of the main body having a concave portion extending in the length direction, the opening angle of the concave portion being less than 180°, the concave portion comprising a tooth groove located in the middle and two concave surfaces located on both sides of the tooth groove respectively, and light guide teeth are arranged at intervals in the tooth groove.

[0007] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0008] The light guide provided in the present application adopts an inwardly concave portion to replace the convex portion in the prior art. The design of the two concave surfaces retains the arc surface structure of the light guide and effectively diffuses the internal light. Compared with the circular light guide, the concave surfaces and the tooth grooves can reduce the material cost. Since the light guide teeth are located inside the tooth grooves, when the light guide is deformed, the light guide teeth can be effectively protected to avoid contact between the light guide teeth and the external structure, thereby reducing or even avoiding the occurrence of bright spots when the light is turned on.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the cross-sections of the two concave surfaces are both in the shape of an inwardly concave circular arc.

[0011] Furthermore, the cross-section of the outer side wall of the main body is an arc shape with an angle greater than 180°.

[0012] Furthermore, the cross-sectional center of the main body is located on a side of the tooth groove bottom away from the tooth groove opening.

[0013] Furthermore, the depth of the concave portion is not less than 0.5 mm.

[0014] Furthermore, it also includes a head, which is connected to one end of the main body, and one end of the head away from the main body is connected to a light source.

[0015] Furthermore, the cross section of the head is a circle that matches the cross section size of the outer side wall of the main body, and a smooth curved surface is used to transition between the head and the main body to the concave surface.

[0016] Furthermore, the light source is an LED lamp bead.

[0017] The present application also provides a light guide system, which comprises a bracket and the light guide as described above.

[0018] Furthermore, a mounting groove for mounting the light guide is formed on the bracket, the concave portion is arranged corresponding to the notch of the mounting groove, the inner wall cross-section of the mounting groove is arc-shaped, and the diameter of the inner wall cross-section of the mounting groove is larger than the diameter of the outer wall cross-section of the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional schematic diagram of a circular light guide in the prior art;

[0020] Figure 2 is a schematic cross-sectional view of a convex light guide in the prior art;

[0021] Figure 3 It is a schematic diagram of the installation of a convex light guide and a bracket in the prior art;

[0022] Figure 4 This is a schematic diagram of the overall structure of a light guide provided in Example 1 of the present application;

[0023] Figure 5 is a schematic cross-sectional view of the main body of the light guide in the first embodiment of the present application;

[0024] Figure 6 for Figure 4 A partial enlarged schematic diagram of the middle m region;

[0025] Figure 7This is a schematic diagram of the structure of a light guide system provided in Example 2 of the present application. DETAILED DESCRIPTION

[0026] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] It will be appreciated that spatial relationship terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as "on" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90° or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0029] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0030] When used herein, the singular forms "a", "an" and " / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0031] Embodiment 1

[0032] like Figure 4 , Figure 5 and Figure 6 As shown, this embodiment provides a light guide 30, which includes a main body 31 extending along the length direction, and one side of the main body 31 has a concave portion 32 extending along the length direction, wherein the opening angle of the concave portion is less than 180°, and the concave portion 32 includes a tooth groove 321 located in the middle and two concave surfaces 322 located on both sides of the tooth groove 321, and light guide teeth 323 are arranged at intervals in the tooth groove 321.

[0033] As a preferred embodiment, the cross-sections of the two concave surfaces 322 are both in the shape of an arc that is concave inward to ensure uniformity of light reflection and passage, and the cross-section of the outer wall of the main body 31 is in the shape of an arc with an angle greater than 180°.

[0034] The light guide provided in the present application adopts an inwardly concave portion 32 to replace the convex portion in the prior art. The design of the two concave surfaces 322 retains the existing light guide arc surface structure and effectively diffuses the internal light. Compared with the circular light guide, the concave surfaces 322 and the tooth grooves 321 can reduce the material cost. Since the light guide teeth 323 are located inside the tooth grooves 321, when the light guide 30 is deformed, the light guide teeth 323 can be effectively protected to prevent the light guide teeth 323 from contacting the external structure, thereby reducing or even avoiding the occurrence of bright spots when lighting.

[0035] In this embodiment, the cross-sectional center o of the main body 31 is located at a side of the bottom of the tooth groove 321 away from the opening of the tooth groove 321 . Preferably, the depth a of the concave portion 32 is not less than 0.5 mm.

[0036] The light guide 30 also includes a head 33 for introducing light into the main body 31 . The head 32 is connected to one end of the main body 31 . The end of the head 33 away from the main body 31 is connected to a light source (not shown in the figure). Preferably, the light source is an LED lamp bead.

[0037] More preferably, the cross section of the head 33 is circular and matches the cross section size of the outer wall of the main body 31 , and a smooth curved surface is used to transition between the head 33 and the main body 31 to form a concave surface 322 to ensure uniformity and stability of light output.

[0038] Embodiment 2

[0039] The present embodiment provides a light guide system 40, which includes a bracket 41 and the light guide 30 as described above, wherein a mounting groove 41a for mounting the light guide 30 is formed on the bracket 41, and the concave portion 32 is arranged corresponding to the notch of the mounting groove 41a, and the inner wall cross-section of the mounting groove 41a is arc-shaped, and the diameter of the inner wall cross-section of the mounting groove is greater than the diameter of the outer wall cross-section of the main body 31.

[0040] The corresponding installation manner of the installation groove 41 a and the concave portion 32 is adopted to effectively prevent the light guide teeth 323 located inside the tooth groove 321 from contacting with the bracket 41 .

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A light guide, characterized in that The light guide includes a main body extending along the length direction, one side of the main body has a concave portion extending along the length direction, the opening angle of the concave portion is less than 180°, the concave portion includes a tooth groove located in the middle and two concave surfaces located on both sides of the tooth groove, and light guide teeth are arranged at intervals in the tooth groove.

2. The light guide according to claim 1, characterized in that The cross sections of the two concave surfaces are both in the shape of an inwardly concave circular arc.

3. The light guide according to claim 1, characterized in that The cross section of the outer side wall of the main body is an arc shape with an angle greater than 180°.

4. The light guide according to claim 1, characterized in that The cross-sectional center of the main body is located at a side of the tooth groove bottom away from the tooth groove opening.

5. The light guide according to claim 1, characterized in that The depth of the concave portion is not less than 0.5 mm.

6. The light guide according to claim 1, characterized in that It also includes a head, which is connected to one end of the main body, and one end of the head away from the main body is connected to a light source.

7. The light guide according to claim 6, characterized in that The cross section of the head is a circle that matches the cross section size of the outer side wall of the main body, and a smooth curved surface is used to transition between the head and the main body to form the concave surface.

8. The light guide according to claim 6, characterized in that The light source is an LED lamp bead.

9. A light guide system, characterized in that: The optical device comprises a bracket and the light guide as claimed in any one of claims 1 to 8.

10. The light guide system according to claim 9, characterized in that The bracket is formed with an installation groove for installing the light guide, the concave portion is arranged corresponding to the notch of the installation groove, the inner wall section of the installation groove is arc-shaped, and the diameter of the inner wall section of the installation groove is larger than the diameter of the outer wall section of the main body.

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