Pressure-resistant breathable moisture-absorbing and drying assembly for car lamp

Abstract

The pressure-resistant breathable moisture-absorbing drying assembly comprises a rear cover shell, an inner cavity of the rear cover shell is used for containing a drying agent, the center of the inner cavity is provided with a breathable hole column, the breathable hole column is communicated with the bottom of the rear cover shell, and the bottom of the rear cover shell is provided with an annular installation groove surrounding the breathable hole column; the two-way pressure release valve component is arranged in the annular mounting groove; the breathable film is arranged outside the annular mounting groove in a covering manner; and the protective cover is fixed on the rear cover shell, the protective cover is provided with air holes which are respectively communicated with the inner cavity of the rear cover shell and the air hole columns, and a moisture permeable film which covers the rear cover shell is arranged on the inner side of the protective cover. The two-way pressure release valve component is matched with the drying agent, ventilation and moisture absorption are achieved, and the problems that an existing automobile lamp rear cover is poor in moisture absorption and ventilation performance, troublesome to install and replace and high in cost, and the service life of a lamp is short are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of the rear cover of vehicle lamps, and specifically relates to a breathable, moisture-absorbing and drying component for a vehicle lamp with pressure resistance. Background Art

[0002] Generally, a vehicle lamp usually includes a base, and a light source is inserted from the rear of the base and fixed inside the base. In order to prevent the infiltration of water droplets, water vapor or dust, which may affect the lighting effect or cause damage to the light source, the vehicle lamp must have corresponding waterproof and dustproof functions. In addition, when the user activates the vehicle lamp to emit light, the heat generated by the light source will also cause the overall temperature of the vehicle lamp to rise with the increase of the usage time. Therefore, the vehicle lamp must also maintain good gas convection as a heat dissipation mechanism to avoid the accumulation of high heat generated by long-term lighting inside the vehicle lamp. Otherwise, it is likely to further shorten the service life of the light source and may also affect the deterioration or deformation of the plastic material used in the vehicle lamp.

[0003] In other words, the vehicle lamp must simultaneously take into account the functions of heat dissipation, waterproofing and moisture-proofing. Therefore, some manufacturers have developed a breathable cover for use in vehicle lamps. For example, in US Patent No. 6364924, a trachea communicating the inside of the base with the outside protrudes from the rear of the base of the aforementioned vehicle lamp. The aforementioned breathable cover is composed of a hollow elastic cylinder and a U-shaped cover body, and a plurality of protrusions are provided on the outer peripheral surface of the elastic cylinder. The user must first insert the aforementioned elastic cylinder into the cover body. At this time, the protrusions of the elastic cylinder will abut against the inner wall surface of the cover body and form a gas channel. Then, the user sleeved the breathable cover on the trachea, that is, inserted the trachea into the cylinder to complete the overall assembly operation.

[0004] Although the aforementioned breathable cover structure can provide the functions of heat dissipation, waterproofing and ventilation, it cannot block the entry of moisture and balance the internal moisture, and the two-piece assembly structure will consume additional assembly time and cost, and still needs to be further improved. Summary of the Utility Model

[0005] In view of this, the technical problem to be solved by the utility model is to provide a breathable, moisture-absorbing and drying component for a vehicle lamp with pressure resistance, which is used to avoid the problems of poor moisture absorption and breathability of the conventional rear cover of the vehicle lamp, troublesome installation and replacement, high cost, and low service life of the lamp.

[0006] To solve the above technical problem, the utility model discloses a breathable, moisture-absorbing and drying component for a vehicle lamp with pressure resistance, including:

[0007] A rear cover housing, the inner cavity of the rear cover housing is used to accommodate a desiccant, and a ventilation hole column is provided at the center of the inner cavity. The ventilation hole column conducts the bottom of the rear cover housing, and an annular installation groove surrounding the ventilation hole column is provided at the bottom of the rear cover housing;

[0008] A two-way pressure relief valve component disposed in an annular mounting groove;

[0009] A breathable film covering the outside of the annular mounting groove;

[0010] A protective cover fixed to the rear cover housing. The protective cover has breathable holes that respectively conduct the inner cavity of the rear cover housing and the breathable hole columns, and a moisture-permeable film covering the rear cover housing is provided on the inner side of the protective cover.

[0011] According to an embodiment of the present invention, the annular mounting groove is provided with annular mounting buckles located on the outer ring. The two-way pressure relief valve component includes a support plate hermetically fixed to the annular mounting buckles. There is a gap between the support plate and the bottom of the annular mounting groove, and there are two positioning holes located on the inner ring. Different-direction one-way pressure relief valves are respectively installed in the positioning holes.

[0012] According to an embodiment of the present invention, an air-permeable ring hole is provided on the outer ring of the positioning hole. The one-way pressure relief valve is made of EPDM and is in an umbrella shape, having a rod portion buckled into the positioning hole and an umbrella portion pressing on the air-permeable ring hole. The umbrella portion has an inner concave arc facing the air-permeable ring hole.

[0013] According to an embodiment of the present invention, the breathable film is set as a PTFE film.

[0014] According to an embodiment of the present invention, a sealing ring is provided around the rear cover housing and is installed in the lamp housing.

[0015] Compared with the prior art, the present invention can obtain the following technical effects:

[0016] When the lamp is lit and working, pressure is generated inside the lamp. The pressure opens the two-way pressure relief valve component to achieve the effect of releasing the pressure inside the lamp;

[0017] When the lamp goes out after working, at this time, negative pressure is generated inside the lamp. The external pressure is high, and air will enter the lamp. At this time, the two-way pressure relief valve component opens to allow external air to enter the lamp, preventing the lamp from bursting due to excessive internal and external pressure differences.

[0018] When the pressure inside and outside the lamp is balanced, the two-way pressure relief valve component is in a completely sealed state. At this time, it can block the conduction of external moisture into the lamp. Coupled with the action of the desiccant, the moisture inside the lamp can be absorbed, thereby solving the problem of lamp fogging, extending the lamp life, and improving driving safety.

[0019] Of course, it is not necessarily required that any product implementing the present invention simultaneously achieves all the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings described herein are used to provide a further understanding of the present utility model and form a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0021] Figure 1 It is a schematic installation diagram of a breathable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp according to an embodiment of the present utility model;

[0022] Figure 2 It is a schematic diagram of a breathable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp according to an embodiment of the present utility model;

[0023] Figure 3 It is a schematic intake diagram of a two-way pressure relief valve component according to an embodiment of the present utility model;

[0024] Figure 4 It is a schematic exhaust diagram of a two-way pressure relief valve component according to an embodiment of the present utility model.

[0025] Reference numerals in the drawings

[0026] Rear cover housing 10, breathable hole column 11, desiccant 20, annular installation groove 30, annular installation buckle 31, two-way pressure relief valve component 40, support plate 41, positioning hole 42, one-way pressure relief valve 43, breathable ring hole 44, breathable membrane 50, protective cover 60, moisture-permeable membrane 70, sealing ring 80. Detailed implementation manners

[0027] The following will detail the implementation manners of the present utility model in conjunction with the drawings and embodiments, so as to fully understand how the present utility model applies technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly.

[0028] Please refer to Figure 1 and Figure 2 , Figure 1 It is a schematic installation diagram of a breathable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp according to an embodiment of the present utility model; Figure 2 It is a schematic diagram of a breathable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp according to an embodiment of the present utility model.

[0029] As shown in the figure, a breathable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp includes: a rear cover housing 10, the inner cavity of the rear cover housing 10 is used to accommodate a desiccant 20, and there is a breathable hole column 11 at the center of the inner cavity. The breathable hole column 11 conducts to the bottom of the rear cover housing 10, and there is an annular installation groove 30 surrounding the breathable hole column 11 at the bottom of the rear cover housing 10; a two-way pressure relief valve component 40 arranged in the annular installation groove 30; a breathable film 50 covering the outside of the annular installation groove 30; a protective cover 60 fixed to the rear cover housing 10, the protective cover 60 has breathable holes respectively conducting to the inner cavity of the rear cover housing 10 and the breathable hole column, and a moisture-permeable film 70 covering the rear cover housing 10 is arranged on the inner side of the protective cover 60.

[0030] In an embodiment of the present invention, the rear cover housing 10 and the protective cover 60 form a breathable cap, and a sealing ring 80 is arranged around and installed at the rear end of the vehicle lamp housing to realize the waterproof, breathable and drying function inside the vehicle lamp. An inner cavity is arranged inside the rear cover housing 10 for accommodating the desiccant 20, and breathable holes are arranged on the surface of the protective cover 60 to realize air exchange.

[0031] A breathable hole column 11 running through to the rear end is arranged at the center of the inner cavity of the rear cover housing 10 for the pressure relief work inside the vehicle lamp. Specifically, the rear end of the breathable hole column 11 is located at the annular installation groove 30 arranged on the rear cover housing 10 for installing the two-way pressure relief valve component 40 to realize the balanced pressure relief inside and outside the vehicle lamp. At the same time, a breathable film 50 is further welded outside the annular installation groove 30, which can be set as a PTFE film to realize the waterproof seal during the breathable process. A moisture-permeable film 70 is additionally added between the protective cover 60 and the rear cover housing 10 to realize moisture permeability for easy drying.

[0032] Next, please continue to refer to Figure 3 and Figure 4 , Figure 3 is the air intake schematic diagram of the two-way pressure relief valve component in the embodiment of the present invention; Figure 4 is the air outlet schematic diagram of the two-way pressure relief valve component in the embodiment of the present invention. The annular installation groove 30 is provided with an annular installation buckle 31 on the outer ring. The two-way pressure relief valve component 40 includes a support plate 41 sealed and fixed to the annular installation buckle 31. There is a gap between the support plate 41 and the bottom of the annular installation groove 30, and there are two positioning holes 42 on the inner ring. Different-direction one-way pressure relief valves 43 are respectively installed in the positioning holes 42. In this embodiment, an annular installation buckle 31 is arranged around the annular installation groove 30 for fixing the support plate 41. The support plate 41 is provided with two positioning holes 42, one above the other, respectively located at both ends of the breathable hole column 11, and the one-way pressure relief valves 43 are respectively installed in the positioning holes 42.

[0033] Further, a ventilation ring hole 44 is provided on the outer ring of the positioning hole 42. The one-way pressure relief valve 43 is made of EPDM and is umbrella-shaped, having a rod portion that snaps into the positioning hole 42 and an umbrella portion that presses on the ventilation ring hole 44. The umbrella portion has a concave arc facing the ventilation ring hole 44. Among them, after the one-way pressure relief valve 43 made of EPDM is inserted into the positioning hole 42, its umbrella portion is flexible and just seals and presses against the ventilation ring hole 44. When the lamp is lit and working, pressure is generated inside the lamp, and the pressure opens one of the one-way pressure relief valves 43 of the two-way pressure relief valve component 40, achieving the effect of releasing the pressure inside the lamp; as Figure 3 shown.

[0034] When the lamp goes out after working, at this time, negative pressure is generated inside the lamp, the external pressure is high, and air will enter the lamp. At this time, the other one-way pressure relief valve 43 of the two-way pressure relief valve component opens to allow external air to enter the lamp, preventing the lamp from bursting due to excessive internal and external pressure differences, as Figure 4 shown.

[0035] When the pressure inside and outside the lamp is balanced, the two-way pressure relief valve component is in a completely sealed state. At this time, it can block the conduction of external moisture into the lamp. Coupled with the action of the desiccant 20, the moisture inside the lamp can be absorbed, thus solving the problem of the lamp fogging, extending the service life of the lamp, and improving driving safety.

[0036] The above description shows and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A breathable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp, characterized in that, Comprising: A rear cover housing, the inner cavity of the rear cover housing is used to accommodate a desiccant, and a ventilation hole column is provided at the center of the inner cavity, the ventilation hole column conducts to the bottom of the rear cover housing, and an annular mounting groove surrounding the ventilation hole column is provided at the bottom of the rear cover housing; A two-way pressure relief valve component arranged in the annular mounting groove; A ventilation membrane covering outside the annular mounting groove; A protective cover fixed to the rear cover housing, the protective cover has ventilation holes respectively conducting to the inner cavity of the rear cover housing and the ventilation hole column, and a moisture-permeable membrane covering the rear cover housing is arranged on the inner side of the protective cover.

2. The air-permeable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp according to claim 1, wherein Wherein an annular mounting buckle is provided on the outer circle of the annular mounting groove, the two-way pressure relief valve component includes a support plate sealed and fixed to the annular mounting buckle, there is a gap between the support plate and the bottom of the annular mounting groove, and two positioning holes are provided on the inner circle, and two one-way pressure relief valves in different directions are respectively installed in the positioning holes.

3. The air-permeable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp according to claim 2, wherein Wherein a ventilation ring hole is provided on the outer circle of the positioning hole, the one-way pressure relief valve is made of EPDM and is in an umbrella shape, having a rod part buckled into the positioning hole and an umbrella part covering the ventilation ring hole, and the umbrella part has an inner concave arc facing the ventilation ring hole.

4. The air-permeable, moisture-absorbing and drying component for a pressure-resistant vehicle lamp according to claim 1, wherein, Wherein the ventilation membrane is set as a PTFE membrane.

5. The air-permeable, moisture-absorbing and drying component for pressure-resistant vehicle lamps according to claim 1, wherein Wherein a sealing ring is provided around the rear cover housing and is installed on the headlight housing.

Images