Car lamp
By setting a multi-layer sealing structure at the connection between the outer light component and the lamp housing, the problem of swelling and cracking of the lamp caused by environmental solvents is solved, achieving higher sealing performance and weather resistance, and reducing production costs and time impact.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2026-04-10
AI Technical Summary
Existing vehicle lights are prone to swelling and cracking when exposed to environmental solvents, especially the outer lens of the continuous taillight, which is prone to cracking after contact with glass cleaner.
A sealing structure is provided at the connection between the external light component and the lamp housing, including at least one layer of colloidal material that does not contain small molecule solvents. Through special connection edge and water-blocking edge design, a multi-layer sealing structure is formed to prevent solvent penetration.
It effectively prevents environmental solvents from corroding the connection points of the vehicle lights, avoids swelling and cracking, improves the weather resistance and sealing performance of the vehicle lights, and reduces production costs and time impact.
Smart Images
Figure CN121828642A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of vehicle lamps, in particular to a vehicle lamp. BACKGROUND
[0002] With the development of diversified vehicle lamp shapes, many manufacturers have launched through-type vehicle lamps.
[0003] The outer light distribution mirror of the vehicle lamp is generally made of PMMA (acrylic) material. PMMA material has excellent weather resistance and high transmittance, and excellent scratch resistance. However, PMMA has poor fluidity, is easy to swell after absorbing alcohol, ketone, and ester solvents, and can cause cracking of the part under the induction of environmental reagents if the molding process, post-processing technology, and assembly process are not properly operated.
[0004] For the through-type tail lamp, glass cleaning liquid needs to be sprayed to keep the rear window clean. The glass cleaning liquid will flow down along the rear window glass and gradually penetrate into the outer light distribution mirror and the lamp body welding seam of the through-type tail lamp. The glass cleaning liquid often contains alcohol or ester solvent components, which can penetrate into the outer light distribution mirror and cause PMMA swelling, thereby causing cracking.
[0005] To this end, the prior art often uses PMMA raw materials with high chemical resistance to produce the outer light distribution mirror, which on the one hand increases the cost and on the other hand still has other failure risks; or increases the annealing time of the outer light distribution mirror, which can seriously affect the production rhythm; or as shown in Figure 1 and Figure 2 The way of setting a flange 4 on the outer light distribution mirror or inserting a sealing strip 5 between the outer light distribution mirror and the vehicle body is used to reduce the possibility of the glass cleaning liquid flowing to the outer light distribution mirror and the lamp body welding seam, thereby reducing the cracking of the outer light distribution mirror. However, the added water blocking structure and the inserted sealing strip cannot completely seal the outer light distribution mirror and the lamp body welding seam, and there is still a risk of cracking of the outer light distribution mirror, and the design of the vehicle lamp is also affected.
[0006] Therefore, how to prevent the vehicle lamp from being affected by environmental solvents and swelling and cracking is a technical problem to be solved by those skilled in the art. SUMMARY
[0007] The technical problem to be solved by the present application is to provide a vehicle lamp to solve the problem of swelling and cracking of the vehicle lamp caused by environmental solvents.
[0008] To solve the above technical problem, the present application provides a vehicle lamp, comprising an outer light emitting part and a lamp body shell, the outer light emitting part is connected with the lamp body shell to form a containing cavity.
[0009] The connection between the light-out member and at least one side of the lamp body shell is provided with a sealing structure on the side outside the accommodating cavity.
[0010] The sealing structure comprises at least one gel layer.
[0011] Optionally, the raw material of the gel layer does not contain small-molecule solvents, which are organic solvents with a molecular weight less than 1000 Da.
[0012] Optionally, the sealing structure comprises multiple gel layers, and the stress and hardness of the gel layer on the outer side are higher than those of the gel layer on the inner side.
[0013] Optionally, the gel layer is selected from at least one of polyurethane glue, silane-modified polyether glue, epoxy sealant, and acrylic sealant.
[0014] Optionally, the edge of the light-out member is formed with a wrapping edge, the extending direction of the wrapping edge is opposite to the light-out direction of the vehicle lamp, the edge of the lamp body shell is formed as a connecting edge adapted to be connected with the wrapping edge, the connecting edge is connected with the wrapping edge, the connecting edge and the wrapping edge are provided with the sealing structure on the side outside the accommodating cavity at the connection therebetween, and the projection of the connecting edge and the wrapping edge in the vertical direction can fall on the wrapping edge.
[0015] Optionally, the connecting edge and the wrapping edge are connected as a connecting groove, the opening direction of the connecting groove is opposite to the light-out direction of the vehicle lamp, and the sealing structure is adapted to seal the connecting groove.
[0016] Optionally, one side of the connecting edge facing the wrapping edge is parallel to one side of the wrapping edge facing the connecting edge, or the distance between one side of the connecting edge facing the wrapping edge and one side of the wrapping edge facing the connecting edge gradually increases in the direction opposite to the light-out direction of the vehicle lamp.
[0017] Optionally, one side of the connecting edge facing the wrapping edge is downwardly inclined in the direction opposite to the light-out direction of the vehicle lamp.
[0018] Optionally, at least the connection between the light-out member and the upper side of the lamp body shell is provided with the sealing structure, and the lower side of the lamp body shell is formed with a water-blocking edge, the water-blocking edge is arranged on the side of the connection between the lower side of the light-out member and the lower side of the lamp body shell, which is away from the light-out direction of the vehicle lamp, and the extending direction of the water-blocking edge intersects the light-out direction of the vehicle lamp.
[0019] Optionally, a guiding surface is formed on the wrapping edge at the upper part of the light-out member, the guiding surface is downwardly inclined in the direction opposite to the light-out direction of the vehicle lamp, so as to guide liquid to the lamp body shell.
[0020] Through the technical scheme, the application has the following beneficial effects:
[0021] The vehicle lamp provided by the application can seal the joint between the light emitting part and the lamp body shell through the sealing structure, so that the environmental solvent cannot easily penetrate into the joint between the light emitting part and the lamp body shell, and the joint between the two parts cannot easily swell and crack due to the environmental solvent.
[0022] Other features and advantages of the application will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS
[0023] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the application. In the drawings:
[0024] Figure 1 is a sectional view of a vehicle lamp structure in the prior art in which a water blocking structure is arranged on an outer light distribution lens;
[0025] Figure 2 is a sectional view of a vehicle lamp structure in the prior art in which a sealing strip is inserted between the outer light distribution lens and the vehicle body;
[0026] Figure 3 is a structural schematic view of a basic embodiment of the vehicle lamp of the application;
[0027] Figure 4 is an enlarged structural schematic view of a welded joint in the basic embodiment of the vehicle lamp of the application;
[0028] Figure 5 is a structural schematic view of a preferred embodiment of the vehicle lamp of the application;
[0029] Figure 6 is a partial enlarged view of an upper region of the vehicle lamp of the application.
[0030] BRIEF DESCRIPTION OF DRAWINGS
[0031] 1. light emitting part; 11. edge covering; 111. guide surface; 2. lamp body shell; 21. connecting edge; 22. water blocking edge; 3. sealing structure; 31. gel layer; 32. resin layer; 4. folded edge; 5. sealing strip. DETAILED DESCRIPTION
[0032] The embodiments of the present disclosure will be described in further detail below with reference to the drawings and examples. The detailed description and drawings of the following examples are intended to illustrate the principles of the present disclosure by way of example only and should not be taken in a limiting sense. The present disclosure can be implemented in many different forms and should not be limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
[0033] The present disclosure provides these embodiments in order to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these examples should be interpreted as merely exemplary, and not as a limitation.
[0034] In addition, "vertical" used in the present disclosure is not strictly vertical, but within the error allowable range. "Parallel" is not strictly parallel, but within the error allowable range. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.
[0035] As shown in Figure 3 and Figure 4 The present disclosure provides a vehicle lamp, as a basic embodiment of the vehicle lamp of the present disclosure, the vehicle lamp comprises an outer light emitting piece 1 and a lamp body shell 2, the outer light emitting piece 1 is connected with the lamp body shell 2 to form a containing cavity, wherein the outer light emitting piece 1 is injection molded by PMMA (acrylic) material, the lamp body shell 2 can also be injection molded by plastic material, the outer light emitting piece 1 and the lamp body shell 2 can be connected by welding (such as friction welding, hot plate welding and laser welding welding forms) to form a containing cavity suitable for containing a light source and an optical element, and the connection between the outer light emitting piece 1 and the lamp body shell 2 at least one side is provided with a sealing structure 3 on the side located outside the containing cavity, and the sealing structure 3 comprises at least one gel layer 31.
[0036] Based on the above technical solution, the vehicle lamp of the present application can seal the connection between the outer light emitting piece 1 and the lamp body shell 2 by the sealing structure 3, so that the environmental solvent is not easy to penetrate into the joint between the outer light emitting piece 1 and the lamp body shell 2, so that the joint between the two is not easy to be induced by the environmental solvent to swell and crack, and the at least one gel layer 31 in the sealing structure 3 can further delay the speed of the environmental solvent penetrating into the joint between the outer light emitting piece 1 and the lamp body shell 2, so as to better prevent the swelling and cracking phenomenon of the connection between the outer light emitting piece 1 and the lamp body shell 2.
[0037] Specifically, the raw material of the gel layer 31 should not contain small molecule solvents, which are organic solvents with a molecular weight less than 1000 Da. Exemplarily, the small molecule solvents include at least one of methanol, ethanol, diethyl ether and acetone, and it is understood that the small molecule solvents can also be other organic solvents with a carbon atom number less than or equal to 4.
[0038] Specifically, the gel layer 31 can use any one of polyurethane sealant, silane modified polyether sealant (MS sealant), epoxy sealant and acrylic sealant, or a mixture of multiple kinds. Since the gel layer 31 itself does not contain solvents that can induce swelling and cracking at the joint, it can better prevent the phenomenon of swelling and cracking at the joint between the light emitting member 1 and the lamp body shell 2.
[0039] It is understood that, as shown in Figure 5 and Figure 6 , as a preferred embodiment of the vehicle lamp of the present application, the sealing structure 3 can be provided to include multiple gel layers 31, and the stress and hardness of the gel layer 31 on the outer side are higher than those of the gel layer 31 on the inner side, wherein the stress refers to the strength against compressive stress, and the hardness refers to scratch hardness and indentation hardness, that is, the gel layer 31 on the outer side needs to be harder in texture to play a role of wear resistance and impact resistance, so as to protect the gel layer 31 on the inner side from being damaged, and the gel layer 31 on the inner side needs to be softer in texture to play a role of buffering, so as to ensure that the gel layer 31 on the inner side is not easy to produce cracks connected with the joint when subjected to vibration or impact, and to ensure that the gap between the gel layer 31 on the outer side and the joint is filled in place after the gel layer 31 on the outer side is hardened and formed, so as to ensure the sealing performance of the joint between the light emitting member 1 and the lamp body shell 2. For example, the sealing structure 3 sequentially from the inside to the outside is the gel layer 31 formed by polyurethane sealant or silicone, and the resin layer 32 formed by epoxy resin, which can be hardened after being formed to play a role of protecting the gel layer 31, and can slow down the aging of the gel layer 31, and can play a better role of isolating environmental solvents, so that the vehicle lamp is less likely to be affected by environmental solvents to produce swelling and cracking.
[0040] As shown in Figure 6As shown, the edge of the light outgoing member 1 is formed with a wrapping edge 11, the extending direction of the wrapping edge 11 is opposite to the light outgoing direction of the vehicle lamp (it can be understood that opposite can be completely opposite to the light outgoing direction of the vehicle lamp, or can be a certain range of included angle with the completely opposite direction of the light outgoing direction of the vehicle lamp, for example, the included angle range is 0° to 20°), the edge of the lamp body shell 2 is formed as a connecting edge 21 suitable for connecting with the wrapping edge 11, the light outgoing member 1 and the lamp body shell 2 can be connected through the connecting edge 21 and the wrapping edge 11, the side of the connecting position of the connecting edge 21 and the wrapping edge 11 located outside the accommodating cavity is provided with a sealing structure 3, and the projection of the connecting position of the connecting edge 21 and the wrapping edge 11 in the vertical direction can fall on the wrapping edge 11, so that the environmental solvent (such as glass cleaner and rainwater) flowing from above to the vehicle lamp can be blocked by the wrapping edge 11, thereby not easily invading the connecting position of the light outgoing member 1 and the lamp body shell 2, and the swelling and cracking of the joint of the connecting position of the light outgoing member 1 and the lamp body shell 2 caused by the influence of the environmental solvent can be avoided.
[0041] It should be noted that the sealing structure 3 should be arranged such that the projection of the side thereof facing away from the light outgoing direction of the vehicle lamp in the vertical direction can fall on the wrapping edge 11, so that the environmental solvent flowing from above to the vehicle lamp can be blocked by the wrapping edge 11, thereby not easily invading the joint formed by the connection between the sealing structure 3 and the light outgoing member 1 and the lamp body shell 2, and the swelling and cracking of the joint of the connecting position of the light outgoing member 1 and the lamp body shell 2 caused by the influence of the environmental solvent can be avoided.
[0042] Specifically, as shown in Figure 5 and Figure 6 the connecting edge 21 and the wrapping edge 11 can be connected to form a connecting groove after the connecting edge 21 and the wrapping edge 11 are connected, the opening direction of the connecting groove is opposite to the light outgoing direction of the vehicle lamp (it can be understood that opposite can be completely opposite to the light outgoing direction of the vehicle lamp, or can be a certain range of included angle with the completely opposite direction of the light outgoing direction of the vehicle lamp, for example, the included angle range is 0° to 20°), the sealing structure 3 is suitable for closing the connecting groove, and the side of the connecting edge 21 facing the wrapping edge 11 is parallel to the side of the wrapping edge 11 facing the connecting edge 21, or the distance between the side of the connecting edge 21 facing the wrapping edge 11 and the side of the wrapping edge 11 facing the connecting edge 21 gradually increases in the direction opposite to the light outgoing direction of the vehicle lamp, the structure design of the connecting groove can ensure that the glue nozzle of the glue distribution equipment used for filling glue to form the glue body layer 31 can more conveniently extend into the joint position of the connecting position of the light outgoing member 1 and the lamp body shell 2 from the opening of the connecting groove after the light outgoing member 1 and the lamp body shell 2 are connected.
[0043] As shown in Figure 6As shown, further, the side of the connecting edge 21 facing the edge 11 can be tilted downward in a direction opposite to the light output direction of the vehicle lamp, so that even if environmental solvent flows into the connecting groove, the environmental solvent will flow downward along the connecting edge 21 to be discharged from the connecting groove, thereby ensuring that environmental solvent does not accumulate in the connecting groove, and thus it is not easy for the joint between the light output component 1 and the lamp housing 2 to be affected by the environmental solvent and cause swelling and cracking.
[0044] It should be noted that a water-blocking edge 22 is formed at the bottom of the lamp housing 2. The water-blocking edge 22 is located on the side away from the light emission direction of the vehicle lamp at the connection between the light-emitting element 1 and the lamp housing 2, and the extension direction of the water-blocking edge 22 intersects the light emission direction of the vehicle lamp. In order to prevent the environmental solvent from flowing down the lamp housing 2 and flowing to the connection between the light-emitting element 1 and the lamp housing 2, the water-blocking edge 22 can stop it. This makes the connection between the light-emitting element 1 and the lamp housing 2 at the bottom of the vehicle lamp less susceptible to swelling and cracking caused by the environmental solvent.
[0045] like Figure 6 As shown, a guide surface 111 can be formed on the upper edge 11 of the light-emitting element 1. The guide surface 111 is inclined downward in a direction opposite to the light-emitting direction of the lamp, so as to guide the liquid to the lamp housing 2. This allows the ambient solvent to flow downward along the lamp housing 2 when it flows from above to the lamp, instead of flowing to the connection between the light-emitting element 1 and the lamp housing 2. This also makes it less likely that the joint at the connection between the two will be affected by the ambient solvent and swell and crack.
[0046] As a preferred embodiment of the vehicle lamp provided by the present invention, such as Figure 5 and Figure 6 As shown, the vehicle headlight includes an outgoing light element 1 and a headlight housing 2. The outer edge of the outgoing light element 1 is formed with a rim 11, and the extension direction of the rim 11 is opposite to the light emission direction of the headlight. The outer edge of the headlight housing 2 is formed with a connecting edge 21 suitable for connecting with the rim 11, so that the outgoing light element 1 and the headlight housing 2 can be connected with the rim 11 through the connecting edge 21. The connecting edge 21 and the rim 11 are preferably connected by laser welding, so that the connection process does not require the introduction of substances containing small molecule organic solvents such as glue, thus making it less likely that the weld at the connection point will be affected by environmental solvents and swell and crack. In addition, the laser welding method is less likely to form burrs at the connection point of the outgoing light element 1 and the headlight housing 2, which is beneficial to ensure the tightness of the seal structure 3 and the connection point after the seal structure 3 is set, thereby ensuring the airtightness.
[0047] It should be noted that the edge 11 should preferably be formed with an abutting surface facing away from the light emitting direction of the vehicle lamp, so as to be connected with the connecting edge 21 through the abutting surface, thereby facilitating the abutting and fitting between the edge 11 and the connecting edge 21, ensuring the firmness of the welding, and enabling the opening direction of the connecting groove formed after the connection of the edge 11 and the connecting edge 21 to be opposite to the light emitting direction of the vehicle lamp. The side of the connecting edge 21 facing the edge 11 can be preferably arranged to be parallel to the horizontal plane, on the one hand, to ensure that the connecting edge 21 can extend into the outer light emitting piece 1 and abut against the edge 11, and on the other hand, to ensure that the glue nozzle of the glue distribution equipment used for filling glue to form the glue layer 31 can more conveniently extend into the welding position of the connecting position of the outer light emitting piece 1 and the lamp body shell 2 from the opening of the connecting groove after the connection of the outer light emitting piece 1 and the lamp body shell 2.
[0048] In addition, a guide surface 111 can also be formed on the edge 11 located at the upper part of the outer light emitting piece 1, which is inclined downward in the direction opposite to the light emitting direction of the vehicle lamp, so as to guide the liquid to the lamp body shell 2, thereby enabling the environmental solvent to flow downward along the lamp body shell 2 when the environmental solvent flows from above, and not flowing to the connecting position of the outer light emitting piece 1 and the lamp body shell 2, so as to avoid the swelling and cracking of the joint of the connecting position.
[0049] Based on the above preferred technical solutions, the edge 11 structure of the vehicle lamp of the present application is different from the conventional water-blocking flange structure, the size of the edge 11 structure of the present application in the length direction of the vehicle is smaller, and is not easily affected by the body panel structure of the vehicle, so as to be more convenient for installation, and to facilitate the design of the body and the vehicle lamp, and to actively guide the environmental solvent to the lamp body shell 2, i.e., the connecting position of the vehicle lamp and the body, thereby enabling the environmental solvent to not easily flow to the connecting position of the outer light emitting piece 1 and the lamp body shell 2 through the more active drainage mode, and avoiding the swelling and cracking of the joint of the connecting position.
[0050] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.
[0051] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will not further describe various possible combinations.
[0052] Furthermore, the various embodiments can also be combined, if not in contradiction, as long as they do not deviate from the spirit of the present application, which should be considered as disclosed.
Claims
1. A vehicle lamp characterized by comprising: The lamp body shell (2) and the light outgoing piece (1) are connected to form a containing cavity; The connection between the light outgoing piece (1) and at least one side of the lamp body shell (2) is provided with a sealing structure (3) on the side outside the containing cavity; The sealing structure (3) comprises at least one gel layer (31).
2. The vehicle lamp of claim 1, wherein The raw material of the gel layer (31) does not contain small molecule solvents, and the small molecule solvents are organic solvents with a molecular weight less than 1000 Da.
3. The vehicle lamp of claim 1, wherein The sealing structure (3) comprises multiple gel layers (31), and the stress and hardness of the gel layer (31) on the outer side are higher than those of the gel layer (31) on the inner side.
4. The vehicle lamp of claim 3, wherein The gel layer (31) is selected from at least one of polyurethane glue, silane modified polyether glue, epoxy sealant and acrylic sealant.
5. The vehicle lamp according to any one of claims 1 to 4, characterized by The edge of the light outgoing piece (1) is formed with a wrapping edge (11) extending in a direction opposite to the light outgoing direction of the vehicle lamp, and the edge of the lamp body shell (2) is formed as a connecting edge (21) adapted to be connected with the wrapping edge (11), the connecting edge (21) is provided with the sealing structure (3) on the side outside the containing cavity at the connection with the wrapping edge (11), and the projection of the connecting edge (21) on the vertical direction at the connection with the wrapping edge (11) can fall on the wrapping edge (11).
6. The vehicle light of claim 5, wherein The connecting edge (21) is connected with the wrapping edge (11) to form a connecting groove, the opening direction of the connecting groove is opposite to the light outgoing direction of the vehicle lamp, and the sealing structure is adapted to close the connecting groove.
7. The vehicle light of claim 6, wherein The side of the connecting edge (21) facing the wrapping edge (11) is parallel to the side of the wrapping edge (11) facing the connecting edge (21), or the distance between the side of the connecting edge (21) facing the wrapping edge (11) and the side of the wrapping edge (11) facing the connecting edge (21) gradually increases in the direction opposite to the light outgoing direction of the vehicle lamp.
8. The vehicle light of claim 7, wherein, The side of the connecting edge (21) facing the wrapping edge (11) is inclined downward in the direction opposite to the light outgoing direction of the vehicle lamp.
9. The vehicle lamp according to any one of claims 1 to 4, characterized by At least the connection between the light outgoing piece (1) and the upper side of the lamp body shell (2) is provided with the sealing structure (3), the lower side of the lamp body shell (2) is formed with a water blocking edge (22), the water blocking edge (22) is arranged on the side of the connection between the lower sides of the light outgoing piece (1) and the lamp body shell (2) away from the light outgoing direction of the vehicle lamp, and the extending direction of the water blocking edge (22) intersects the light outgoing direction of the vehicle lamp.
10. The vehicle light of claim 5, wherein, The wrapping edge (11) on the upper part of the light outgoing piece (1) is formed with a guide surface (111) inclined downward in the direction opposite to the light outgoing direction of the vehicle lamp, so as to guide liquid to the lamp body shell (2).