Light guide device and vehicle lamp structure

Abstract

A light guide device and a vehicle lamp structure relate to the technical field of vehicle lamps. The light guide device comprises a light source, a first light guide, a second light guide and a light guide nut. The first light guide and the second light guide are sequentially arranged on the light emitting side of the light source, a first mounting cavity and a second mounting cavity communicated with the first mounting cavity are formed in the light guide nut, the first light guide is connected into the first mounting cavity in a limited mode, and the second light guide is connected into the second mounting cavity in a limited mode. One end, far away from the first light guide, of the second light guide extends out of the second mounting cavity; the temperature resistance of the first light guide is higher than that of the second light guide, the transmittance of the second light guide is larger than that of the second light guide, and the length of the second light guide is larger than that of the first light guide. The light guide device can solve the problems that a light guide is prone to yellowing, fogging, fusing and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, and in particular to a light guide device and a vehicle lamp structure. Background Art

[0002] With the rapid development of the automotive industry, the requirements for car lights are getting higher and higher, from traditional halogen lamps to the popularization of LEDs, and then to the maturity of laser car lights and OLED technology. Among them, car lights use more and more light guide strips, and the structure is becoming more and more complex.

[0003] In the prior art, after the light guide nut is installed with the light guide and the lamp body, in order to ensure that more light from the LED can enter the light guide, the distance between the light guide light-inlet surface and the LED needs to be set very close. However, the closer the distance between the conventional polycarbonate material (PC) light guide and the LED is, the greater the heat resistance pressure of the light guide, and the higher the risk of defects such as yellowing, fogging, and melting of the light guide. Especially when used as a daytime running light, it is impossible to use PMMA material that is more transparent and not easy to yellow but has a slightly lower temperature resistance as the light guide. Therefore, how to provide a new solution to effectively solve the problems of yellowing, fogging, and melting of light guides without affecting the light effect is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The utility model aims to provide a light guide device and a vehicle lamp structure, which can improve the problems of yellowing, fogging, melting and the like of the light guide.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In one aspect of the utility model, a light guide device is provided, which includes a light source, a first light guide, a second light guide and a light guide nut; the first light guide and the second light guide are sequentially arranged on the light emitting side of the light source, a first mounting cavity and a second mounting cavity communicating with the first mounting cavity are arranged on the light guide nut, the first light guide is limitedly connected in the first mounting cavity, the second light guide is limitedly connected in the second mounting cavity, and an end of the second light guide away from the first light guide extends outside the second mounting cavity; the temperature resistance of the first light guide is higher than that of the second light guide, the transmittance of the second light guide is greater than that of the first light guide, and the length of the second light guide is greater than that of the first light guide. The light guide device can improve the problems of yellowing, fogging, and melting of the light guide.

[0007] Optionally, the first light guide and the second light guide are coaxially arranged, and the light exiting surface area of ​​the first light guide is smaller than or equal to the light incident surface area of ​​the second light guide.

[0008] Optionally, the light guide nut further comprises a first positioning boss protruding from the inner wall of the first mounting cavity, the first positioning boss being located at one end of the first mounting cavity away from the second mounting cavity and abutting against the end face of the first light guide close to the light source for axially limiting the first light guide.

[0009] Optionally, the light guide nut further includes a first positioning rib provided on the inner wall of the first mounting cavity, the first positioning rib abutting against the outer circumferential surface of the first light guide for radially limiting the first light guide.

[0010] Optionally, the optical waveguide nut also includes a second positioning rib provided on the inner wall of the second mounting cavity, the second positioning rib abuts against the outer peripheral surface of the second optical waveguide and is used to radially limit the second optical waveguide, and the distance between the second positioning rib and the central axis of the second mounting cavity is greater than or equal to the distance between the first positioning rib and the central axis of the first mounting cavity.

[0011] Optionally, the material of the first light guide is optical silicone, and the material of the second light guide is polymethyl methacrylate.

[0012] Optionally, the inner wall of the second installation cavity is further provided with a guide groove and a hollow groove that are interconnected; the guide groove and the hollow groove are both connected to the second installation cavity; the outer periphery of the second light guide is provided with a limit platform that is adapted to the guide groove, and when the light guide nut is sleeved on the outer periphery of the second light guide, the limit platform can be inserted into the guide groove; and when the light guide nut is driven to rotate, the limit platform can enter from the guide groove into the hollow groove, so that the hollow groove can axially limit the second light guide.

[0013] Optionally, a mounting boss is further provided on the periphery of the optical nut, and the optical device further comprises a matching structure sleeved on the periphery of the optical nut, the matching structure comprising a central through hole for the optical nut to pass through and a avoidance hole connected to the central through hole, the avoidance hole being adapted to correspond to the mounting boss.

[0014] Optionally, a flange structure is provided at one end of the optical waveguide nut away from the mounting boss, an elastic member is provided on one side of the flange structure, the elastic member is located at the outer periphery of the optical waveguide nut, and a first guide surface and a first limiting boss are provided at one end of the matching structure close to the first optical waveguide; the optical waveguide nut is driven to rotate, and the elastic member can extend to the bottom of the first limiting boss under the guidance of the first guide surface, and provide an axial force for the first limiting boss.

[0015] Optionally, a second limiting boss is further provided on one side of the flange structure, and a limiting column is provided on one end of the matching structure close to the first optical waveguide, and the limiting column has a second guide surface and a stop surface; the optical waveguide nut is driven to rotate, and the second limiting boss can cooperate with the stop surface under the guiding action of the second guide surface to prevent the optical waveguide nut from rotating in the opposite direction through the stop surface.

[0016] Optionally, a third limiting boss is provided at the bottom of the flange structure, and a positioning hole is provided on the flange structure; the light guide device also includes a circuit board and a heat sink, the light source is electrically connected to the circuit board, the circuit board is located between the flange structure and the heat sink, the side of the third limiting boss facing away from the flange structure is in contact with the circuit board, and the positioning pin of the heat sink is inserted into the positioning hole to radially position the light source relative to the first light guide.

[0017] Another aspect of the present invention provides a vehicle lamp structure, which includes the above-mentioned light guide device.

[0018] The beneficial effects of the utility model include:

[0019] The optical waveguide device provided in the present application includes a light source, a first optical waveguide, a second optical waveguide and an optical waveguide nut; the first optical waveguide and the second optical waveguide are arranged on the light emitting side of the light source in sequence, and the optical waveguide nut is provided with a first mounting cavity and a second mounting cavity connected to the first mounting cavity, the first optical waveguide is limitedly connected in the first mounting cavity, the second optical waveguide is limitedly connected in the second mounting cavity, and one end of the second optical waveguide away from the first optical waveguide extends outside the second mounting cavity; the temperature resistance of the first optical waveguide is higher than that of the second optical waveguide, the transmittance of the second optical waveguide is greater than the transmittance of the first optical waveguide, and the length of the second optical waveguide is greater than the length of the first optical waveguide. In the present application, a first mounting cavity for positionally fixing the first light guide and a second mounting cavity for positionally fixing the second light guide are provided on the light guide nut, so that the first light guide and the second light guide can be positionally fixed; and the first light guide with better temperature resistance is arranged at a position close to the light source, which can ensure higher light efficiency and reduce the temperature resistance risk of surrounding parts; and the second light guide with longer length, better transparency and less yellowing is arranged at a position far away from the light source, so that the yellowing, fogging, burning and other problems that are prone to occur in high-power PC light guides in the prior art can be solved, and the appearance of the light guide is more transparent and bright white. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a light guide device provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of a first light guide, a second light guide and a light guide nut provided in an embodiment of the utility model;

[0022] Figure 3 One of the structural schematic diagrams of the light guide nut provided in the embodiment of the utility model;

[0023] Figure 4 The second structural schematic diagram of the light guide nut provided in the embodiment of the utility model;

[0024] Figure 5 The third structural schematic diagram of the light guide nut provided in the embodiment of the utility model;

[0025] Figure 6 A fourth structural schematic diagram of the light guide nut provided in an embodiment of the utility model;

[0026] Figure 7 A fifth structural diagram of the light guide nut provided in an embodiment of the utility model;

[0027] Figure 8 A schematic diagram of the structure of a second light guide provided in an embodiment of the utility model;

[0028] Fig. 9 One of the structural schematic diagrams of the matching structure provided by the embodiment of the utility model;

[0029] Fig.10 The second structural diagram of the matching structure provided by the embodiment of the utility model;

[0030] Fig.11 The third structural diagram of the matching structure provided for the embodiment of the utility model.

[0031] Icons: 10-first light guide; 20-second light guide; 21-limiting platform; 30-light guide nut; 31-first mounting cavity; 311-first positioning boss; 312-first positioning rib; 32-second mounting cavity; 321-second positioning rib; 322-guide groove; 323-hollow groove; 33-mounting boss; 34-flanged structure; 341-second limiting boss; 342-third limiting boss; 343-positioning hole; 35-elastic member; 40-matching structure; 41-center through hole; 42-avoidance hole; 43-first guide surface; 44-first limiting boss; 45-limiting column; 451-second guide surface; 452-stop surface; 46-fourth limiting boss; 461-anti-reverse rotation surface; 462-limiting surface; 50-circuit board; 60-heat sink. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Please refer to Figure 1 and Figure 2 The present embodiment provides a light guide device, which includes a light source, a first light guide 10, a second light guide 20 and a light guide nut 30; the first light guide 10 and the second light guide 20 are sequentially arranged on the light emitting side of the light source, the light guide nut 30 is provided with a first mounting cavity 31 and a second mounting cavity 32 communicating with the first mounting cavity 31, the first light guide 10 is limitedly connected in the first mounting cavity 31, the second light guide 20 is limitedly connected in the second mounting cavity 32, and one end of the second light guide 20 away from the first light guide 10 extends outside the second mounting cavity 32; the temperature resistance of the first light guide 10 is higher than that of the second light guide 20, the transmittance of the second light guide 20 is greater than that of the first light guide 10, and the length of the second light guide 20 is greater than that of the first light guide 10. The light guide device can improve the problems of yellowing, fogging, and melting of the light guide.

[0039] The above-mentioned optical waveguide nut 30 can connect and fix the first optical waveguide 10 and the second optical waveguide 20. In this embodiment, the optical waveguide nut 30 has a first mounting cavity 31 and a second mounting cavity 32, wherein the first mounting cavity 31 is used to limit the connection of the first optical waveguide 10, and the second mounting cavity 32 is used to limit the connection of the second optical waveguide 20.

[0040] It should be noted that in this embodiment, the first light guide 10 is arranged close to the light source, and the second light guide 20 is arranged far from the light source, that is, the first light guide 10 is arranged on the light output side of the light source, and the second light guide 20 is arranged on the light output side of the first light guide 10 .

[0041] Furthermore, in this embodiment, the temperature resistance of the first light guide 10 is higher than that of the second light guide 20, and the transmittance of the second light guide 20 is higher than that of the first light guide 10. In this way, the first light guide 10 can withstand the temperature resistance pressure of the light source at a close distance, and is not prone to defects such as yellowing, fogging, and melting. Generally speaking, materials with high light transmittance have relatively low temperature resistance. In this application, since the second light guide 20 is far away from the light source, a material with lower temperature resistance than the first light guide 10 can be used. At the same time, in order to pursue high light efficiency and uniform lighting effects, the second light guide 20 uses a material with higher light transmittance than the first light guide 10.

[0042] Optionally, the material of the first light guide 10 is optical silicone, and the material of the second light guide 20 is polymethyl methacrylate (PMMA). In this application, the first light guide 10 close to the light source is made of high-temperature resistant optical silicone, and the second light guide 20 far from the light source is made of more transparent and less prone to yellowing PMMA. In addition, the length of the second light guide 20 is much longer than the first light guide 10. In this way, since the first light guide 10 close to the light source has better temperature resistance, and the second light guide 20 far from the light source and much longer than the first light guide 10 has better material transparency, it can solve the problems of yellowing, fogging, and melting of the traditional polycarbonate material (PC) light guide used for high-power car lights, and can make the overall appearance of the light guide more transparent and bright white.

[0043] In addition, since the present application uses high-temperature resistant optical silicone as the material of the first light guide 10 close to the light source, the light source and the first light guide 10 can be arranged closer, so that the large-angle direct light from the light source can directly enter the light incident surface of the first light guide 10, ensuring that more light enters the light guide and improving the light efficiency.

[0044] The specific structures of the first installation cavity 31 and the second installation cavity 32 are not limited in the present application, as long as the first light guide 10 and the second light guide 20 can be fixed without affecting the light effect.

[0045] In summary, the optical waveguide device provided in the present application includes a light source, a first optical waveguide 10, a second optical waveguide 20 and an optical waveguide nut 30; the first optical waveguide 10 and the second optical waveguide 20 are sequentially arranged on the light emitting side of the light source, and the optical waveguide nut 30 is provided with a first mounting cavity 31 and a second mounting cavity 32 connected to the first mounting cavity 31, the first optical waveguide 10 is limitedly connected in the first mounting cavity 31, the second optical waveguide 20 is limitedly connected in the second mounting cavity 32, and one end of the second optical waveguide 20 away from the first optical waveguide 10 extends outside the second mounting cavity 32; the material of the first optical waveguide 10 is optical silicone, the material of the second optical waveguide 20 is polymethyl methacrylate, and the length of the second optical waveguide 20 is greater than the length of the first optical waveguide 10. In the present application, a first mounting cavity 31 for limiting and fixing the first light guide 10 and a second mounting cavity 32 for limiting and fixing the second light guide 20 are provided on the light guide nut 30, so that the first light guide 10 and the second light guide 20 can be limited and fixed; and the first light guide 10 with better temperature resistance is arranged at a position close to the light source, which can ensure a higher light efficiency; the second light guide 20 with a longer length, better permeability and less yellowing is arranged at a position far away from the light source, which can solve the problems of yellowing, fogging, melting and the like of the light guide made of polycarbonate material for high-power car lights in the prior art when it is close to the light source, and the appearance of the light guide made of polymethyl methacrylate material is more transparent and bright white.

[0046] In order to allow more light to enter the first light guide 10 and the second light guide 20, please refer to Figure 2 Optionally, the first light guide 10 and the second light guide 20 are coaxially arranged, and the light output surface area of ​​the first light guide 10 is smaller than or equal to the light input surface area of ​​the second light guide 20.

[0047] In order to prevent the first light guide 10 from falling off the first mounting cavity 31, in the present embodiment, optionally, the light guide nut 30 also includes a first positioning boss 311 protruding from the inner wall of the first mounting cavity 31, and the first positioning boss 311 is located at one end of the first mounting cavity 31 away from the second mounting cavity 32, and abuts against the end face of the first light guide 10 close to the light source, for axially limiting the first light guide 10.

[0048] It should be noted that if Figure 2 As shown, the first positioning boss 311 extends outward from the inner wall of the first installation cavity 31 (extends from the inner wall of the first installation cavity 31 toward the central axis of the first installation cavity 31 ).

[0049] In order to radially limit the first light guide 10, please refer to Figure 3 and Figure 4 Optionally, the optical fiber nut 30 further includes a first positioning rib 312 disposed on the inner wall of the first mounting cavity 31 , and the first positioning rib 312 abuts against the outer circumferential surface of the first optical fiber 10 to radially limit the first optical fiber 10 .

[0050] The first positioning ribs 312 may include a plurality of them, and the plurality of first positioning ribs 312 may be evenly distributed on the inner wall of the first mounting cavity 31 and arranged around the first light guide 10 .

[0051] Similarly, in order to achieve radial limitation of the second light guide 20, optionally, as Figure 3 and Figure 4 The optical fiber nut 30 also includes a second positioning rib 321 provided on the inner wall of the second mounting cavity 32. The second positioning rib 321 abuts against the outer circumferential surface of the second optical fiber 20 and is used to radially limit the second optical fiber 20. The radial dimension of the second positioning rib 321 is less than or equal to the radial dimension of the first positioning rib 312.

[0052] The radial dimension of the second positioning rib 321 is smaller than or equal to the radial dimension of the first positioning rib 312 , so that the radial dimension of the second light guide 20 installed in the second installation cavity 32 is larger than or equal to the radial dimension of the first light guide 10 installed in the first installation cavity 31 , so that the light beam emitted from the first light guide 10 can all enter the second light guide 20 .

[0053] Please refer to Figures 5 and 6 Optionally, a guide groove 322 and a hollow groove 323 that are interconnected are further recessed on the inner wall of the second mounting cavity 32; the guide groove 322 and the hollow groove 323 are both connected to the second mounting cavity 32; a limit platform 21 that is adapted to the guide groove 322 is provided on the outer periphery of the second light guide 20, and when the light guide nut 30 is sleeved on the outer periphery of the second light guide 20, the limit platform 21 can be inserted into the guide groove 322; and when the light guide nut 30 is driven to rotate, the limit platform 21 can enter from the guide groove 322 into the hollow groove 323, so that the hollow groove 323 can axially limit the second light guide 20.

[0054] It should be noted that a limiting platform 21 is provided on the outer periphery of the second light guide 20. Figure 8 As shown, in this embodiment, when assembling the light guide device, it is necessary to first insert the first light guide 10 into the first installation cavity 31, and then sleeve the light guide nut 30 with the first light guide 10 inserted therein on the outer periphery of the second light guide 20 (at this time, the guide groove 322 on the light guide nut 30 can avoid the position of the limit platform 21 on the outer periphery of the second light guide 20). After the light guide nut 30 is installed in place, the light guide nut 30 is screwed. At this time, the limit platform 21 on the outer periphery of the second light guide 20 can be inserted into the hollow groove 323 (as shown in FIG. Figure 7 ), thereby achieving axial limitation of the second light guide 20 through the hollow groove 323.

[0055] Of course, when the second light guide 20 is axially limited in the second installation cavity 32 , the second light guide 20 can also achieve axial limitation of the first light guide 10 , thereby preventing the first light guide 10 from falling off from the second installation cavity 32 .

[0056] Please refer to Figure 1 , Figure 6 and Figure 7 Optionally, a mounting boss 33 is further provided on the outer periphery of the optical nut 30, and the optical device further includes a matching structure 40 sleeved on the outer periphery of the optical nut 30, the matching structure 40 having a central through hole 41 for the optical nut 30 to pass through and a avoidance hole 42 connected to the central through hole 41, and the avoidance hole 42 is adapted to correspond to the mounting boss 33.

[0057] It should be noted that the above-mentioned matching structure 40 is a part of the lamp body of the vehicle lamp structure. The matching structure 40 has a central through hole 41 and a position avoidance hole 42. When the light guide nut 30 inserted with the first light guide 10 matches with the second light guide 20, the light guide nut 30 simultaneously penetrates into the central through hole 41, and the mounting boss 33 on the outer periphery of the light guide nut 30 matches with the position avoidance hole 42.

[0058] In this embodiment, the avoidance hole 42 is provided to avoid the mounting boss 33 when the light guide nut 30 is installed. Figure 1 As shown, the mounting boss 33 is located on the upper surface of the matching structure 40 . At this time, the optical guide nut 30 can rotate freely, thereby limiting the axial position of the optical guide nut 30 and the second optical guide 20 .

[0059] In addition, in order to achieve radial positioning of the optical nut 30, please refer to Figure 1 and Fig.11 , the matching structure 40 is also provided with a fourth limiting boss 46, one side of the fourth limiting boss 46 is an anti-reverse rotation surface 461, and the other side is a limiting surface 462. By setting the anti-reverse rotation surface 461, the optical nut 30 can be limited from rotating in the reverse direction, so that the optical nut 30 can be smoothly screwed in the forward direction so that the optical nut 30 and the second optical guide 20 can be axially limited. The setting of the limiting surface 462 can limit the forward screwing angle of the optical nut 30 to avoid over-screwing. It should be noted that the above-mentioned forward direction can be clockwise, and the reverse direction can be counterclockwise; or, the above-mentioned forward direction can be counterclockwise, and the reverse direction can be clockwise.

[0060] Please refer to Figure 7 and Fig. 9 A flange structure 34 is provided at one end of the optical nut 30 away from the mounting boss 33, an elastic member 35 is provided on one side of the flange structure 34, and the elastic member 35 is located at the outer periphery of the optical nut 30, and a first guide surface 43 and a first limiting boss 44 are provided at one end of the matching structure 40 close to the first optical waveguide 10; the optical nut 30 is driven to rotate, and the elastic member 35 can extend to the bottom of the first limiting boss 44 under the guidance of the first guide surface 43, and provide an axial force for the first limiting boss 44.

[0061] That is, when the light guide nut 30 is screwed, the end of the elastic member 35 installed on the light guide nut 30 will extend to the bottom of the first limiting boss 44 under the guidance of the first guide surface 43, thereby increasing the axial force on the first limiting boss 44. In this way, the elastic member 35 can combine with the mounting boss 33 to axially clamp and limit the opposite sides of the matching structure 40, such as Figure 1 .

[0062] In order to achieve radial positioning of the optical nut 30 and the matching structure 40, optionally, please refer to Figure 7 , Fig. 9 and Fig.10 , a second limiting boss 341 is also provided on one side of the flange structure 34, and a limiting column 45 is provided on one end of the matching structure 40 close to the first light guide 10, and the limiting column 45 has a second guide surface 451 and a stop surface 452; the light guide nut 30 is driven to rotate, and the second limiting boss 341 can cooperate with the stop surface 452 under the guidance of the second guide surface 451, so as to prevent the light guide nut 30 from rotating in the opposite direction through the stop surface 452. In this way, the limiting column 45 of the matching structure 40 cooperates with the second limiting boss 341 of the light guide nut 30 and combines with the fourth limiting boss 46 mentioned above to form a stop for the matching structure 40 to prevent the light guide nut 30 from rotating radially.

[0063] Please refer to Figure 1 and Figure 7 A third limiting boss 342 is provided at the bottom of the flange structure 34, and a positioning hole 343 is provided on the flange structure 34; the light guide device also includes a circuit board 50 and a heat sink 60, the light source is electrically connected to the circuit board 50, the circuit board 50 is located between the flange structure 34 and the heat sink 60, the third limiting boss 342 is abutted against the circuit board 50 on one side away from the flange structure 34, and the positioning pin of the heat sink 60 is inserted into the positioning hole 343 to achieve radial positioning of the light source on the circuit board 50 and the first light guide 10.

[0064] Another aspect of the present invention provides a vehicle lamp structure, which includes the above-mentioned light guide device. Since the specific structure and technical effects of the light guide device have been described in detail above, this application will not repeat them here.

[0065] The above description is only an optional embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0066] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

Claims

1. A light guide device, characterized in that: The light guide nut comprises a light source, a first light guide, a second light guide and a light guide nut; the first light guide and the second light guide are sequentially arranged on the light emitting side of the light source; the light guide nut is provided with a first mounting cavity and a second mounting cavity communicating with the first mounting cavity; the first light guide is limitedly connected in the first mounting cavity; the second light guide is limitedly connected in the second mounting cavity; and an end of the second light guide away from the first light guide extends outside the second mounting cavity; The temperature resistance of the first light guide is higher than that of the second light guide, the transmittance of the second light guide is greater than that of the first light guide, and the length of the second light guide is greater than that of the first light guide.

2. The light guide device according to claim 1, characterized in that The first light guide and the second light guide are coaxially arranged, and the light emitting surface area of ​​the first light guide is smaller than or equal to the light incident surface area of ​​the second light guide.

3. The light guide device according to claim 1, characterized in that The optical waveguide nut also includes a first positioning boss protruding from the inner wall of the first mounting cavity. The first positioning boss is located at one end of the first mounting cavity away from the second mounting cavity and abuts against the end face of the first optical waveguide close to the light source for axially limiting the first optical waveguide.

4. The light guide device according to claim 3, characterized in that The optical guide nut further includes a first positioning rib disposed on the inner wall of the first mounting cavity, wherein the first positioning rib abuts against the outer circumferential surface of the first optical guide and is used for radially limiting the first optical guide.

5. The light guide device according to claim 4, characterized in that The optical waveguide nut also includes a second positioning rib arranged on the inner wall of the second mounting cavity, the second positioning rib abuts against the outer circumferential surface of the second optical waveguide and is used to radially limit the second optical waveguide, and the distance between the second positioning rib and the central axis of the second mounting cavity is greater than or equal to the distance between the first positioning rib and the central axis of the first mounting cavity.

6. The light guide device according to claim 1, characterized in that The material of the first light guide is optical silicone, and the material of the second light guide is polymethyl methacrylate.

7. The light guide device according to any one of claims 1 to 6, characterized in that: The inner wall of the second mounting cavity is further provided with a guide groove and a hollow groove which are interconnected; the guide groove and the hollow groove are both connected with the second mounting cavity; the outer periphery of the second light guide is provided with a limit platform which is adapted to the guide groove, and when the light guide nut is sleeved on the outer periphery of the second light guide, the limit platform can be inserted into the guide groove; and when the light guide nut is driven to rotate, the limit platform can enter from the guide groove into the hollow groove, so that the hollow groove can axially limit the second light guide.

8. The light guide device according to claim 6, characterized in that The outer periphery of the optical nut is also provided with a mounting boss, and the optical device also includes a matching structure sleeved on the outer periphery of the optical nut, the matching structure has a central through hole for the optical nut to pass through and a avoidance hole connected to the central through hole, and the avoidance hole is adapted to correspond to the mounting boss.

9. The light guide device according to claim 8, characterized in that A flange structure is provided at one end of the optical waveguide nut away from the mounting boss, an elastic member is provided on one side of the flange structure, and the elastic member is located at the outer periphery of the optical waveguide nut; a first guide surface and a first limiting boss are provided at one end of the matching structure close to the first optical waveguide; the optical waveguide nut is driven to rotate, and the elastic member can extend to the bottom of the first limiting boss under the guiding action of the first guide surface and provide an axial force for the first limiting boss.

10. The light guide device according to claim 9, characterized in that A second limiting boss is also provided on one side of the flanging structure, and a limiting column is provided on one end of the matching structure close to the first light guide, and the limiting column has a second guide surface and a stop surface; the light guide nut is driven to rotate, and the second limiting boss can cooperate with the stop surface under the guiding action of the second guide surface to prevent the light guide nut from rotating in the opposite direction through the stop surface.

11. The light guide device according to claim 9, characterized in that A third limiting boss is provided at the bottom of the flange structure, and a positioning hole is provided on the flange structure; the light guide device also includes a circuit board and a heat sink, the light source is electrically connected to the circuit board, the circuit board is located between the flange structure and the heat sink, the third limiting boss abuts against the circuit board on one side facing away from the flange structure, and the positioning pin of the heat sink is inserted into the positioning hole to radially position the light source relative to the first light guide.

12. A vehicle lamp structure, characterized in that: A light guide device comprising any one of claims 1 to 11.

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