Vehicle lamp and vehicle

Abstract

The utility model discloses a car lamp and a car, the car lamp comprises: a thick wall light guide, which comprises a first split body and a second split body, the first split body comprises an embedded part and an extension part, the bottom of the second split body is recessed to form an assembly cavity, the embedded part is embedded in the assembly cavity, and a decorative ring, the decorative ring is connected to the outer surface of the first split body. Compared with the prior art, the thick-wall light guide is split into the first split body and the second split body along with the shape, so that the wall thickness of the thick-wall light guide formed by single injection molding is reduced, the molding period of parts is shortened, a process window of injection molding is enlarged, and the appearance defects such as shrinkage marks and cavities caused by over-thick wall thickness are overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle car light technical field, especially a car light and vehicle. BACKGROUND

[0002] The lamp of the current market vehicle type is to make static perception show the high grade feeling like crystal clear diamond, the position light, the turn signal, the brake light in the car light usually use thick wall light guide to do light distribution, when the car light modeling is done very thin, the thick wall light guide and light distribution device in the lamp usually have no space arrangement installation structure, and in order to reduce the mold development cost and production cost, reduce the lamp internal parts disassembly, therefore thick wall light guide and decorative ring are usually integrated as a part.

[0003] Thick wall double -colored decorative ring is composed of thick wall light guide and decorative ring, through double -colored injection molding, according to product structure and appearance requirement, mold structure is feasible usually one injection molding piece is transparent PC thick wall piece, two injection molding pieces are black PC decorative ring, this product structure design and molding process has the following defects:

[0004] (1) long molding cycle

[0005] Thick wall light guide wall thickness design is usually above 8mm, by injection molding mold cooling system equation, in the cooling stage of thermoplastic injection molding, cooling time is mainly determined by the part thickness, and the molding PC material needs high mold temperature (100 DEG C) and material temperature (300 DEG C), prolongs the cooling time, and the molding cycle is usually about 540s.

[0006] (2) low product qualification rate

[0007] In order to improve the appearance quality of product, process conditions are set with high pressure low speed filling, high pressure holding pressure, long pressure holding time and high mold temperature. If the pressure is insufficient, the thick wall light guide is easy to form internal cavity or external shrinkage, the thick wall light guide side is used as the parting surface of the molded decorative ring, and the two-color decorative ring is easy to form glue leakage; if the pressure is high, the filling quality of the thick wall light guide increases, the thick wall light guide side is pulled in the mold opening process (, which reduces the aesthetic perception quality. Figure 1

[0008] (3) narrow molding window and poor mold stability

[0009] The thick wall light guide molding process is set with high pressure low speed filling, high pressure holding pressure, long pressure holding time and high mold temperature, and the mold is easy to bite under high temperature and high pressure. UTILITY MODEL CONTENTS

[0010] The utility model aims at providing a car light and vehicle to solve the technical problems in the prior art, meet the modeling requirements, and reduce the molding cycle of the thick wall light guide.

[0011] ​The utility model provides a kind of car light, comprising:

[0012] Thick-wall light guide, including first part and second part, the first part includes embedding part and outer extension, the bottom of the second part is recessed to form assembly cavity, the embedding part is embedded in the assembly cavity,

[0013] Decorative ring, the decorative ring is connected to the outer surface of the first part.

[0014] The car light as described above, wherein, preferably, the length of the bottom edge of the second part is greater than or equal to 3 mm.

[0015] The car light as described above, wherein, preferably, the bottom end of the first part is provided with a positioning rib.

[0016] The car light as described above, wherein, preferably, the outside surface draft of the positioning rib is less than or equal to 2°.

[0017] The car light as described above, wherein, preferably, the side surface of the second part includes an upper side surface and a lower side surface, the included angle between the upper side surface and the vertical plane is greater than the included angle between the lower side surface and the vertical plane, and the decorative ring is connected to the lower side surface.

[0018] The car light as described above, wherein, preferably, the inclination angle of the lower side surface is greater than or equal to 7°.

[0019] The car light as described above, wherein, preferably, the inclination angle of the upper side surface is equal to the outside surface draft of the positioning rib plus 10°.

[0020] The car light as described above, wherein, preferably, the first part and the decorative ring are one-shot molded parts, and the second part is a two-shot molded part.

[0021] The car light as described above, wherein, preferably, the thickness of the second part located on the opposite sides of the first part is the same as the thickness of the first part.

[0022] The utility model provides a kind of vehicle, comprising the car light described above.

[0023] Compared with the prior art, the utility model splits the thick-wall light guide into the first part and the second part according to the shape, reduces the wall thickness of the thick-wall light guide in single injection molding, reduces the molding cycle of the part, increases the process window of injection molding, and solves the appearance defects such as shrinkage and cavity caused by excessive wall thickness. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1is a partial sectional view of the vehicle lamp provided by the embodiment of the utility model.

[0025] Mark explanation:

[0026] 10-thick wall light guide, 11-first sub-body, 111-embedded part, 112-outer extension part, 113-positioning rib, 12-second sub-body, 121-assembly cavity, 122-upper side, 123-lower side;

[0027] 20-decorative ring;

[0028] 100-vehicle lamp. DETAILED DESCRIPTION

[0029] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be explained as the limitation of the utility model.

[0030] In the first aspect, referring to Figure 1 The utility model provides a kind of vehicle lamp 100, including thick wall light guide 10 and decorative ring 20, wherein:

[0031] Thick wall light guide 10 includes first sub-body 11 and second sub-body 12 formed in steps, first sub-body 11 includes integrally-formed embedded part 111 and outer extension part 112, embedded part 111 protrudes on outer extension part 112, the bottom of second sub-body 12 is recessed to form assembly cavity 121, assembly cavity 121 forms opening in the bottom of second sub-body 12, embedded part 111 extends into assembly cavity 121 from the opening, embedded part 111 is fixed in assembly cavity 121 by embedding mode, the outer contour surface of embedded part 111 is matched with the inner contour surface of assembly cavity 121, ensure that first sub-body 11 and second sub-body 12 can be accurately docked and fixed together, the stability and optical performance of entire light guide structure, ensure that light is effectively transmitted and distributed in the inside of light guide.

[0032] Decorative ring 20 is connected to the outer surface of first sub-body 11, so that the appearance quality of vehicle lamp 100 can be improved, and the outer surface of thick wall light guide 10 can also be protected from damage.

[0033] The thick-wall light guide 10 is split into the first part 11 and the second part 12, the wall thickness of the thick-wall light guide 10 is reduced in a single injection molding, the wall thickness of each part can be optimized, the molding problem caused by the excessive wall thickness is avoided, the molding cycle of the part is reduced, the process window of the injection molding is increased, the process parameters can be adjusted more flexibly in the molding process, and the production efficiency and the product quality are improved. The appearance defects such as shrinkage and cavity caused by the excessive wall thickness are solved, and the stability and the aesthetics of the product in use are ensured.

[0034] In the embodiments provided by the utility model, the length of the bottom edge of the second part 12 and the bottom edge of the decorative ring 20 is greater than or equal to 3 mm, which helps to ensure that the parting surface of the mold is reasonably designed, so as to facilitate molding and demolding, and reduce molding defects such as shrinkage and warping, which helps to ensure the effective transmission of light in the light guide and avoid light leakage, and the sufficient edge distance length can provide better visual effect, making the transition between the decorative ring 20 and the second part 12 smoother and improving the overall appearance of the product. Those skilled in the art can know that the edge distance length can be flexibly adjusted according to the actual product needs.

[0035] In a feasible implementation, the bottom end of the first part 11 is provided with a positioning rib 113 to ensure accurate positioning of the first part 11 during assembly, prevent displacement or deformation during injection molding or subsequent assembly, and thus ensure the structural stability of the entire thick-wall light guide 10. During injection molding, the positioning rib 113 can help the flow and filling of the plastic melt in the mold, assist the flow of the plastic melt as a flow channel, and ensure the molding quality. After the injection of the first part 11, the height of the positioning rib 113 is preferably 2.5 mm to avoid the first part 11 from being stuck to the mold due to shrinkage when the mold is opened.

[0036] In order to ensure that the positioning rib 113 can be smoothly removed from the mold, the positioning rib 113 is designed to have a certain demolding slope, preferably, the outer side surface demolding slope of the positioning rib 113 is less than or equal to 2°, and the outer side surface demolding slope of the positioning rib 113 is greater than or equal to 1°, to avoid the first part 11 from being stuck to the mold due to shrinkage when the mold is opened, ensure smooth demolding and not damage the product, ensure the smoothness of demolding, and also ensure the structural strength and surface quality of the product.

[0037] In a feasible implementation, the side surface of the second part 12 includes an upper side surface 122 and a lower side surface 123, the angle between the upper side surface 122 and the vertical plane is greater than the angle between the lower side surface 123 and the vertical plane, and the decorative ring 20 is connected to the lower side surface 123.

[0038] By dividing the side surface of the second part 12 into an upper side surface 122 and a lower side surface 123, different angles between the light guide and the vertical plane are allowed, which affects the propagation path of the light rays. By adjusting the angles between the upper side surface 122, the lower side surface 123 and the vertical plane, the distribution and propagation of the light rays can be optimized, and the structural stability of the light guide can also be improved, especially when subjected to external pressure. Different angles can provide better support.

[0039] The angle between the upper side surface 122 and the vertical plane is greater than the angle between the lower side surface 123 and the vertical plane, which can make the reflection and refraction of light rays inside the light guide more concentrated, and help improve the optical efficiency of the light guide.

[0040] Further, the inclination angle of the lower side surface 123 is ≥7°, which is the minimum insertion and sealing angle of the dynamic mold, ensuring that the second part 12 can be smoothly demolded, meeting the requirements of the injection molding process, and improving the optical performance and structural stability of the light guide.

[0041] Preferably, the inclination angle of the upper side surface 122 is equal to the demolding slope of the outer side surface of the positioning rib 113 + 10°, which helps to improve the demolding efficiency, making the upper side surface 122 more easily separated from the mold, reducing friction and damage during demolding. At the same time, the larger inclination angle of the upper side surface 122 helps to enhance the structural stability of the thick-walled light guide 10 when subjected to external pressure or vibration, and can also help to control the propagation path of the light rays and improve the light efficiency.

[0042] In a feasible implementation, the first part 11 and the decorative ring 20 are a one-shot molded part, and the second part 12 is a two-shot molded part. This can simplify the production process, maintain the complexity and functionality of the product, and the mold can simultaneously injection mold the first part 11 and the decorative ring 20 in the first shot, and injection mold the second part 12 in the second shot. The mold structure can be designed according to a two-color two-station design, which reduces the cost of a set of molds compared to a three-color three-station mold, reduces the number of mold changes, reduces production costs, shortens the production cycle, and helps to improve the consistency of product quality.

[0043] In the embodiments provided by the utility model, the thickness of the second part 12 located on the opposite sides of the first part 11 is the same as the thickness of the first part 11, to ensure the symmetry of the entire thick-walled light guide 10, help to ensure the uniform distribution of light rays inside the thick-walled light guide 10, avoid uneven refraction or reflection of light rays due to thickness differences, and at the same time provide uniform mechanical strength, reduce stress concentration caused by different thicknesses, and thus improve the durability and impact resistance of the product. Under temperature changes, components of the same thickness will have similar thermal expansion and contraction behavior, which can maintain the performance and dimensional stability of the entire light guide at different temperatures.

[0044] The side of the thick-wall light guide 10 is no longer a parting surface of the shaped decorative ring 20, the problem of glue leakage and tensile injury caused by the side of the thick-wall light guide 10 as a parting surface is solved, and the machining amount of the mold is reduced.

[0045] In a second aspect, the utility model provides a kind of vehicle, comprising the vehicle light 100 of preceding.

[0046] The above detailed description of the preferred embodiments of the present application with reference to the drawings illustrates the structure, features and effects of the present application.The above description is only a preferred embodiment of the present application, but the present application is not limited by the drawings.The changes or modifications made in accordance with the concept of the present application, or the equivalent embodiments with equivalent changes, are still within the scope of the present application as long as they do not exceed the spirit of the specification and drawings.

Claims

1. A vehicle lamp characterized by comprising: The application relates to a thick-wall light guide, which comprises a first part and a second part, the first part comprises an embedded part and an extension part, the bottom of the second part is recessed to form an assembly cavity, the embedded part is embedded in the assembly cavity, a decorative ring connected to the outer surface of the first part. The length of the bottom edge of the second part is greater than or equal to 3mm.

2. The vehicle lamp of claim 1, wherein The bottom end of the first part is provided with a positioning rib.

3. The vehicle lamp of claim 1, wherein The demoulding slope of the outer side surface of the positioning rib is less than or equal to 2 degrees, and the demoulding slope of the outer side surface of the positioning rib is greater than or equal to 1 degree.

4. The vehicle light of claim 3, wherein The side surface of the second part comprises an upper side surface and a lower side surface, the included angle between the upper side surface and the vertical plane is greater than the included angle between the lower side surface and the vertical plane, and the decorative ring is connected to the lower side surface.

5. The vehicle lamp of claim 3, wherein The inclination angle of the lower side surface is greater than or equal to 7 degrees.

6. The vehicle light of claim 5, wherein The inclination angle of the upper side surface is equal to the demoulding slope of the outer side surface of the positioning rib plus 10 degrees.

7. The vehicle lamp of claim 5, wherein The first part and the decorative ring are a one-shot forming part, and the second part is a two-shot forming part.

8. The vehicle lamp of claim 1, wherein The thickness of the second part located on the opposite sides of the first part is the same as the thickness of the first part.

9. The vehicle lamp of claim 1, wherein The application further relates to a vehicle lamp comprising any one of the thick-wall light guides according to claims 1-9.

10. A vehicle characterized by comprising: ​

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