Rear cover of car lamp

Abstract

The utility model belongs to the technical field of automobile parts, and particularly relates to an automobile lamp rear cover which comprises a base, a cover plate and a breathable film. According to the device provided by the utility model, the risks of air leakage and water leakage are reduced and the moisture absorption effect of the device is improved by adopting a mode of integrally forming and increasing the volume of the cavity, and the device has the advantages of simple structure, low manufacturing cost, strong practicability and good economical efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to a headlight rear cover. Background Technology

[0002] Automotive lights generally consist of a lamp cover, a rearview mirror, a lamp holder, a bulb, and a rear cover. The rear cover is assembled with the lamp cover and mainly serves a sealing function, requiring a tight fit with the lamp cover.

[0003] The curved surfaces of automotive headlights and the newly added LED headlight technology have led to more severe condensation and fogging on the inner surface of the transparent glass shell in areas such as cold, curved, and sharp transition zones. Currently, common techniques for dispersing moisture inside automotive headlights include: 1. Spraying an anti-fog coating onto the inside of the headlight shell and then using a hot air drying process, where the hydrophilic groups arrange themselves on the coating surface to form an anti-fog film; 2. Using a desiccant packet inside the headlight shell. The first method has generally low hygroscopicity, while the desiccant packet in the second method is prone to disintegration upon impact.

[0004] To this end, the document with authorization announcement number CN209587948U discloses a vehicle headlight rear cover for quickly filtering fog. The headlight rear cover includes a rear cover shell and a rear cover end cover connected to the rear cover shell. A water vapor filter, a fog absorption device, a gas flow channel device and a drying device are sequentially arranged on the gas flow path from the side away from the rear cover end cover. A labyrinth flow channel structure for extending the gas flow path is formed in the inner cavity of the gas flow channel device.

[0005] This device can effectively filter moisture inside the headlights; however, the structure is quite complex, especially with numerous connection points and surfaces. Each connection may leak air due to inaccurate processing or assembly. Utility Model Content

[0006] To address the aforementioned problems, the purpose of this utility model is to provide a rear cover for vehicle lights. Through the design of a base, cover plate, and breathable membrane, it ensures strong moisture absorption capacity without causing air or liquid leakage, and has the advantages of strong practicality and good economy.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A headlight rear cover, comprising:

[0009] The base includes a closed, airtight bottom plate, and a cavity is formed inside the base, one end of which is connected to the outside and the other end is closed. A filter is provided inside the cavity.

[0010] A cover plate, which is connected to the base, and the cover plate is provided with vent holes for guiding air into / out of the cavity;

[0011] A breathable membrane is disposed at the connection between the cover plate and the base and is used to cover the port of the cavity.

[0012] As a further preferred embodiment of the present invention, the inner bottom surface of the base is provided with a partition for dividing the cavity into at least two independent chambers; the number of vent holes is multiple, and each independent chamber corresponds to at least one vent hole.

[0013] As a further preferred embodiment of this utility model, the partition divides the cavity into several sector-shaped cavities, and the partitions are directly connected to each other at the center.

[0014] As a further preferred embodiment of the present invention, a connecting groove is provided on the outer wall of the end of the base near the cover plate, and a protrusion for inserting into the connecting groove is provided on the outer peripheral side of the surface of the cover plate near the base.

[0015] As a further preferred embodiment of this utility model, a pressure block is provided at the center of the surface of the cover plate near the base.

[0016] As a further preferred embodiment of the present invention, the connecting groove is an annular groove, the outer periphery of the breathable membrane extends into the connecting groove, and the protrusion is an annular block used to fit the breathable membrane into the groove wall of the connecting groove.

[0017] As a further preferred embodiment of the present invention, the end of the protrusion near the connecting groove is formed with an inclined surface for pressing the breathable membrane.

[0018] As a further preferred embodiment of this utility model, an annular support plate is provided on the outer periphery of the base.

[0019] As a further preferred embodiment of this utility model, the outer peripheral side of the base away from the cover plate is provided with reinforcing ribs that are connected to the annular support plate.

[0020] As a further preferred embodiment of this utility model, the base is a one-piece molded part.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a vehicle headlight rear cover that is integrally molded and increases the cavity volume, which reduces the risk of air and water leakage and improves the moisture absorption effect of the device, keeping the humidity inside the headlight within a range of less than RH 35%~40%, avoiding condensation. In addition, the device has a simple structure, low manufacturing cost, and has the advantages of strong practicality and good economy. Attached Figure Description

[0023] Appendix Figure 1 This is a schematic diagram of the present invention from the main viewing angle.

[0024] Appendix Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention from a 120-degree perspective.

[0025] Appendix Figure 3 This is a schematic diagram of the 180-degree cross-sectional structure of the present invention from the main viewing angle.

[0026] Appendix Figure 4 This is a schematic diagram of the cover plate of this utility model from a top view.

[0027] Appendix Figure 5 This is a three-dimensional structural diagram of the present invention.

[0028] Appendix Figure 6 This is a three-dimensional structural diagram of the present invention after the cover plate has been removed.

[0029] Attached diagram: 1. Base; 2. Cover plate; 3. Breathable membrane; 4. Sealing ring; 5. Connecting key;

[0030] 111 sealed, airtight bottom plate; 11 cavity; 12 partition; 13 connecting groove; 14 annular support plate; 15 reinforcing rib; 16 filter body.

[0031] Ventilation hole 21, protrusion 22, pressure block 23;

[0032] Incline 221. Detailed Implementation

[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] This embodiment provides a rear cover for a vehicle headlight, as shown in the attached image. Figure 1 ~Appendix Figure 6 As shown, it includes:

[0037] The base 1 includes a closed, airtight bottom plate 111, and a cavity 11 is formed inside the base 1, one end of which is connected to the outside and the other end is closed. A filter 16 is provided inside the cavity 11.

[0038] Cover plate 2, which is connected to the base 1, and the cover plate 2 is provided with a vent 21 for guiding air into / out of the cavity 11;

[0039] A breathable membrane 3 is disposed at the connection between the cover plate 2 and the base 1 and is used to cover the port of the cavity 11.

[0040] The base 1 is a one-piece molded part, such as an injection-molded cylinder. The bottom of the cylinder is a closed, airtight bottom plate 111, and the top has an opening. The closed, airtight bottom plate 111 serves as the bottom surface of the cavity 11, so that the cavity 11 is closed at the bottom and does not communicate with the outside, while it communicates with the outside at the opening at the top to allow air to enter and exit. The filter 16 used to fill the cavity 11 is a commonly used hygroscopic particulate material in the art, such as magnesium chloride, calcium chloride, bentonite, silica aerogel, carbon molecular sieve, carbon aerogel, water-absorbing resin, etc. The cover plate 2 can adopt any connection method commonly used in the art, such as bonding, welding, threaded connection, interference fit, etc. The breathable membrane 3 is preferably made of polytetrafluoroethylene (PTFE), and a coating with the ability to absorb and transfer moisture can be attached to the surface of the PTFE membrane to enhance the breathable membrane 3. The specific material of the coating can be any coating known to those skilled in the art, and therefore will not be described in detail.

[0041] It is worth noting that the specific process of "guiding air into / out of the vent 21 of the cavity 11" is as follows: after the air containing moisture enters the cavity 11 through the vent 21, the moisture is absorbed by the filter 16, and the "dehumidified" air is discharged again from the vent 21. Because the filter 16 filling the cavity 11 is large, the filter 16 has a strong overall ability to absorb moisture and a fast speed, which can maintain a low humidity state and avoid the phenomenon of condensation.

[0042] Compared to existing technologies, the taillight cover provided in this embodiment is almost integrally molded with a large internal cavity, which not only ensures strong moisture absorption capacity but also prevents air and liquid leakage. It has the advantages of simple structure and strong practicality.

[0043] In some preferred embodiments, a partition 12 is provided on the inner bottom surface of the base 1 to divide the cavity 11 into at least two independent chambers; the number of vent holes 21 is multiple, and each independent chamber corresponds to at least one vent hole 21. The partition 12 can be installed in the cavity 11 by means of detachable connection or by means of fixed connection. Preferably, the partition 12 is integrally formed in the cavity 11 during the injection molding of the base 1.

[0044] Furthermore, the partition 12 will divide the cavity into several sector-shaped cavities, and the partition 12 is directly connected to each other at the center. The purpose of this arrangement is to ensure that the partition 12 divides the cavity 11 into equal spaces.

[0045] As a specific embodiment, three partitions 12 can be provided, dividing the cavity 11 into three independent fan-shaped cavities of equal volume. The advantage of this arrangement is that it helps to improve the utilization efficiency of the filter body 16 and also avoids the problem of excessive displacement of the filter body 16 when subjected to impact, which would affect the moisture absorption effect.

[0046] In some preferred embodiments, a connecting groove 13 is provided on the outer wall of the end of the base 1 near the cover plate 2, and a protrusion 22 is provided on the outer peripheral side of the surface of the cover plate 2 near the base 1, which is inserted into the connecting groove 13. The connecting grooves 13 are evenly distributed along the upper outer peripheral side of the base 1, and the size and position of the protrusions 22 match the connecting grooves 13 one by one. This arrangement improves the tightness of the connection between the cover plate 2 and the base 1.

[0047] In some preferred embodiments, a pressure block 23 is provided at the center of the surface of the cover plate 2 near the base 1. This arrangement causes the pressure block 23 to interact with the central upper surface of the partition plate 12 to clamp the breathable membrane 3, thereby improving the fixation effect on the breathable membrane 3.

[0048] In some preferred embodiments, the connecting groove 13 is an annular groove, and the outer periphery of the breathable membrane 3 extends into the connecting groove 13. The protrusion 22 is an annular block used to fit the breathable membrane 3 against the groove wall of the connecting groove 13. This arrangement helps to increase the contact area between the breathable membrane 3 and the base 1, thereby improving the fixing effect of the breathable membrane 3 and further enhancing the sealing effect at the periphery of the breathable membrane 3. Preferably, the end of the protrusion 22 near the connecting groove 13 has a bevel 221 for pressing the breathable membrane 3. The bevel 221 gradually tapers from top to bottom. When the cover plate 2 is connected to the base 1 from top to bottom, the pressing effect of the bevel 221 on the breathable membrane 3 is enhanced, which not only ensures the fastening effect of the breathable membrane 3, but also ensures that the breathable membrane 3 will not be worn or even broken due to the gradual pressing measure.

[0049] It is understood that an annular support plate 14 is provided on the outer periphery of the base 1, and a reinforcing rib 15 connected to the annular support plate 14 is provided on the outer periphery of the base 1 away from the cover plate 2. A sealing ring 4 is provided at the upper end of the annular support plate 14 to ensure the tight connection between the taillight and other structures when it is installed in the assembly. A connecting key 5 is provided on the outer periphery of the base 1 at the upper end of the annular support plate 14 to achieve a locking connection with other structures in the assembly. At the same time, the connecting key 5 can also limit and fix the sealing ring 4.

[0050] This invention reduces the risk of air and water leakage and improves the moisture absorption effect of the device by using one-piece molding and increasing the cavity volume. This keeps the humidity inside the vehicle light within a range of less than 35%~40% RH, avoiding condensation. In addition, the device has a simple structure, low manufacturing cost, and has the advantages of strong practicality and good economy.

[0051] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A rear cover for a vehicle light, characterized by: The utility model relates to a filter device, which comprises: a base (1) comprising a closed air-tight bottom plate (111), a cavity (11) with one end communicating with the outside and the other end being closed is formed in the base (1), and a filter body (16) is arranged in the cavity (11); a cover plate (2) connected with the base (1), and the cover plate (2) is provided with air permeable holes (21) for guiding air to enter or exit the cavity (11); an air permeable film (3) arranged at the joint of the cover plate (2) and the base (1) and used for covering the port of the cavity (11).

2. The rear cover of a vehicle lamp according to claim 1, characterized in that: The inner bottom surface of the base (1) is provided with a partition plate (12) for separating the cavity (11) into at least two independent chambers; the air permeable holes (21) are in plurality, and each independent chamber corresponds to at least one air permeable hole (21).

3. A rear cover for a vehicle lamp according to claim 2, wherein: The partition plate (12) separates the cavity (11) into several fan-shaped cavities, and the partition plates (12) are directly connected with each other at the center.

4. The rear cover of a vehicle lamp according to claim 1, characterized in that: The base (1) is provided with a connecting groove (13) on the end outer wall close to the cover plate (2), and the cover plate (2) is provided with a protrusion (22) inserted into the connecting groove (13) on the surface outer circumferential side close to the base (1).

5. The rear cover of a vehicle lamp according to claim 1, characterized in that: The cover plate (2) is provided with a pressing block (23) close to the center of the surface of the base (1).

6. A rear cover for a vehicle lamp according to claim 4, wherein: The connecting groove (13) is an annular groove, the outer circumferential side of the air permeable film (3) extends into the connecting groove (13), and the protrusion (22) is an annular block used for abutting the air permeable film (3) and the groove wall of the connecting groove (13).

7. A rear cover for a vehicle lamp according to claim 6, wherein: The protrusion (22) is formed with an inclined surface (221) close to the end of the connecting groove (13) for pressing the air permeable film (3).

8. The rear cover of a vehicle lamp according to claim 1, characterized in that: The base (1) is provided with an annular support plate (14) on the outer circumferential side.

9. A rear cover for a vehicle lamp according to claim 8, wherein: The base (1) is provided with a reinforcing rib (15) connected with the annular support plate (14) on the outer circumferential side away from the cover plate (2).

10. The rear cover of a vehicle lamp according to claim 1, characterized in that: The base (1) is an integral molding.

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