KR102470788B1 - Dust cover for automobile lamps - Google Patents

Abstract

The present invention relates to a dust cover for an automobile lamp. In such a dust cover for an automobile lamp, a moisture absorbent is installed in a space inside a housing divided by a barrier rib, and the moisture absorbent is installed on an upper portion of the barrier rib to cover the divided space in which the moisture absorbent is installed. The dust cover for the automobile lamp includes the housing, a barrier rib, the moisture absorbent, a sponge, and a breathable film. The housing forms the appearance of the dust cover for the automobile lamp, and may be configured such that the space is formed therein and an upper portion is opened. Therefore, it provides an effect capable of effectively removing moisture inside the automobile lamp.

Description

Dust cover for automotive lamp {DUST COVER FOR AUTOMOBILE LAMPS}

The present invention relates to a dust cover for an automobile lamp, and more particularly, a sponge is configured to cover a divided space inside a housing divided by a partition wall in which a moisture absorbent is accommodated, so that a breathable film sealing the upper portion of the housing is formed with a moisture absorbent. A dust cover for an automobile lamp capable of minimizing protrusion due to expansion.

In general, automobiles are provided with various types of lamps (hereinafter referred to as automobile lamps) for the purpose of stably securing the driver's vision when the surrounding illumination is low while driving or for the purpose of informing other vehicles of the driving state of the vehicle. .

1 is a view showing a vehicle equipped with a vehicle lamp.

Specifically, as shown in FIG. 1, the automobile lamps installed in the automobile 2 include a headlamp 3 installed in front of the automobile 2 and illuminating the front during night driving, and a driver operating the brake. and a rear lamp 4 including a brake light that is turned on when driving and a direction indicator light that informs the direction of the vehicle.

2 is a diagram illustrating a vehicle lamp.

And, referring to FIG. 2 , the vehicle lamp 100 may include a case 110, a light source lamp 120 for irradiating light, a cover 130 through which light may pass, and a dust cover 140. .

Referring to FIG. 2, when the temperature of the cover 130 is lowered when the temperature difference between the outside and the inside of the vehicle lamp 100 is large, the moisture particles inside the vehicle lamp 100 are condensed and the cover (130) Fine water droplets form on the inner surface. In addition, fine water droplets formed on the inner surface of the cover 130 cause light scattering to interfere with safe driving of the vehicle.

In order to solve this problem, a method of absorbing moisture inside the automobile lamp 100 by installing an absorbent in the space inside the dust cover 140 provided to replace the light source lamp 120 is sometimes used. In this way, it is not easy to mount the absorbent in the space inside the dust cover 140, since a plurality of components are installed inside the automobile lamp 100 and the space is narrow. because it doesn't

For example, Korean Patent Publication No. 10-2012-0018995 discloses a dust cap mounted on a housing of a headlamp and having an opening formed on one side, and an absorbent provided inside the dust cap to remove moisture generated from the headlamp. Disclosed is a structure for mounting a moisture absorbent for a headlamp.

The moisture absorbent mounting structure for headlamps disclosed in Korean Patent Publication No. 10-2012-0018995 provides an effect of preventing moisture from being generated inside the headlamp by providing a moisture absorbent in the housing of the headlamp, but the moisture absorbent absorbs moisture. As the moisture is released again, there is a problem of not preventing moisture from being generated again inside the headlamp.

In order to solve this problem, Korean Patent Registration No. 10-2245735 discloses a dust cover including a housing with an accommodation space formed therein and one end open, a moisture absorbent provided in the accommodation space, and a breathable film sealing the accommodation space. are doing

In the dust cover disclosed in Korean Registered Patent No. 10-2245735, moisture flowing from the inside of a vehicle lamp through the air permeable film to the accommodation space can pass through the air permeability film with high efficiency, and from the accommodation space through the air permeability film to the automobile lamp Moisture flowing inside is configured to pass through the breathable film with low efficiency.

Therefore, the dust cover has a high efficiency in removing moisture generated inside the car lamp by the desiccant, but a low efficiency in releasing moisture from the desiccant to the inside of the car lamp. occurrence can be prevented.

However, the absorbent contained in the receiving space of the dust cover expands as it absorbs moisture, and the expanded absorbent protrudes the air permeable film toward the inside of the vehicle lamp. In this way, the protruding breathable film comes into contact with components such as a light source lamp installed inside the vehicle lamp, whereby the breathable film may be damaged or components such as the light source lamp installed inside the vehicle lamp that come into contact with the breathable film may be damaged. may be

Therefore, while minimizing the amount of moisture released from the moisture absorbent contained inside the dust cover into the car lamp, the protrusion of the breathable film can be minimized by the moisture absorbent that expands as it absorbs moisture. It is necessary to develop a dust cover that is

One object of the present invention is to enable a dust cover for an automobile lamp to effectively remove moisture inside the automobile lamp.

Another object of the present invention is to prevent a breathable film from expanding as a dust cover for an automobile lamp absorbs moisture inside the automobile lamp.

The object of the present invention is not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

As a technical means for achieving the above technical problem, a dust cover for a vehicle lamp according to an embodiment of the present invention includes a lower surface and a side surface so that a space is formed therein, and a housing with an open top, the inside of the space A partition wall installed in the partition wall to divide the space into a plurality of divided spaces, a moisture absorbent installed inside each divided space, a sponge installed on the upper part of the partition wall to cover the divided space, and an upper portion of the housing to cover the sponge. It may include a breathable film to be installed.

In addition, the lower surface may be formed flat, and the side surface may be formed by connecting a plurality of flat surfaces to each other, formed by connecting a plurality of curved surfaces to each other, or formed by a curved surface forming a closed loop.

In addition, the housing may have a cross-section parallel to the lower surface formed in any one of a polygonal shape, an elliptical shape, and a circular shape.

In addition, the barrier rib may be formed in a shape in which a plurality of flat plates erected in a direction perpendicular to the lower surface cross each other.

Also, axes formed by crossing the plurality of flat plates may be the same.

In addition, the barrier rib may be formed in a shape in which a plurality of curved plates erected in a direction perpendicular to the lower surface cross each other.

Also, axes formed by crossing the plurality of curved plates may be the same.

Also, the height of the barrier rib may be lower than the height of the housing by a predetermined length.

In addition, the sponge may be installed on the partition wall so that an outer circumferential surface of the sponge comes into contact with an inner circumferential surface of the housing.

Also, the height of the sponge may be equal to or less than the predetermined length.

Also, the barrier rib may be formed such that the volumes of the plurality of divided spaces are equal to each other.

In addition, the desiccant may be installed inside each of the divided spaces to fill each of the divided spaces at a predetermined rate or less.

Also, the predetermined ratio may be 80%.

In addition, the moisture absorbent may include at least one or two or more moisture absorbents selected from the group consisting of magnesium chloride, calcium chloride and sodium carbonate, a curable inorganic material including at least one selected from the group consisting of magnesium oxide and calcium oxide, and an alkali metal phosphate. can

In addition, the moisture absorbent may further include a polymer wax.

Details of other embodiments for solving the problem are included in the description and drawings of the invention.

According to the above-described means for solving the problems of the present invention, the dust cover for an automobile lamp according to the present invention absorbs moisture introduced by a moisture absorbent contained in a divided space inside a housing through a breathable film, thereby reducing moisture inside the automobile lamp. Provides an effective removal effect.

In addition, since the moisture absorbent is installed in each divided space inside the housing divided by the partition wall, the amount of the moisture absorbent concentrated toward the breathable film is reduced even when the housing is tilted, so that the breathable film expands even when the moisture absorbent absorbs moisture and expands. provide a preventive effect.

In addition, since the sponge is configured to cover the divided space in which the desiccant is installed, when the desiccant in contact with the sponge absorbs moisture and expands, the sponge is compressed by the volume in which the desiccant expands, thereby preventing the breathable film from expanding. .

1 is a view showing a vehicle equipped with a vehicle lamp.
2 is a diagram illustrating a vehicle lamp.
3 is a view showing a dust cover for a vehicle lamp according to an embodiment of the present invention.
4 is a view showing a housing;
5 is a view showing a partition wall installed in the housing.
6 is a view showing another shape of a partition wall installed in a housing.
7 is a view showing a sponge.
8 is a view showing a sponge installed on the upper part of the bulkhead.
9 is a view showing a breathable film installed on the top of the housing.
FIG. 10 is a view showing a dust cover for an automobile lamp in which a barrier rib in which a moisture absorbent is directed toward an air permeable film and a sponge are not installed.
FIG. 11 is a view showing a dust cover for an automobile lamp in which a barrier rib in which a moisture absorbent is directed toward a breathable film and a sponge are installed.
12A is a graph showing the expansion thickness of an air permeable film according to moisture absorption and release cycles of a dust cover for an automobile lamp in which a sponge is installed.
12B is a graph showing the expansion thickness of an air permeable film according to moisture absorption and release cycles of a dust cover for an automobile lamp in which a sponge is not installed.
13 is a graph showing moisture absorption rates according to moisture absorption and discharge cycles of a dust cover for an automobile lamp with a sponge and a dust cover for an automobile lamp without a sponge.
14 is a table showing the moisture absorption rate and the expansion thickness of the air permeable film of a dust cover for a car lamp with a sponge and a dust cover for a car lamp without a sponge.
15 is a view showing a dust cover in which a partition wall is made of sponge and no sponge is installed on the upper part of the partition wall.
FIG. 16 is a table showing moisture absorption rates and expansion thicknesses of breathable films of a dust cover in which a partition wall is made of sponge and no sponge is installed on the upper part of the partition wall, and a dust cover for a vehicle lamp in which a sponge is installed on the upper part of the partition wall.

Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" to another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element in between. do.

Throughout the present specification, when a member is said to be located “on” another member, this includes not only a case where a member is in contact with another member, but also a case where another member exists between the two members.

Throughout the present specification, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated. As used throughout this specification, the terms "about," "substantially," and the like are used at or approximating that value when manufacturing and material tolerances inherent in the stated meaning are given, and do not convey the understanding of this application. Accurate or absolute figures are used to help prevent exploitation by unscrupulous infringers of the disclosed disclosure. The term "step of (doing)" or "step of" as used throughout the present specification does not mean "step for".

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and the description below. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Like reference numbers indicate like elements throughout the specification.

Hereinafter, a configuration of a dust cover 1 for a vehicle lamp according to an embodiment of the present invention will be described.

3 is a view showing a dust cover for a vehicle lamp according to an embodiment of the present invention.

Referring to FIG. 3 , the dust cover 1 for a vehicle lamp includes a housing 10, a partition wall 20, a moisture absorbent 30, a sponge 40, and a breathable film 50.

First, the housing 10 will be described.

The housing 10 forms the exterior of the dust cover 1 for an automobile lamp, and may be configured such that a space 15 is formed therein and an upper portion is open.

4 is a view showing a housing;

Specifically, referring to FIG. 4 , the housing 10 includes a lower surface 11 and a side surface 13 so that a space 15 is formed therein, and an upper portion may be opened.

The lower surface 11 may be formed flat, and the side surface 13 may be formed in various shapes.

For example, the side surface 13 may be formed as a curved surface forming a closed loop as shown in FIG. It could be.

As the side surface 13 is formed in various shapes, the cross-section of the housing 10 parallel to the lower surface 11 may be formed in any one of a polygonal shape, an elliptical shape, and a circular shape.

Meanwhile, although not shown in the drawing, the housing 10 may be configured to be coupled to a vehicle lamp. For example, the housing 10 may be provided with a first screw thread on an outer circumferential surface to be screwed to an automobile lamp having a second screw thread. As the housing 10 is coupled to the vehicle lamp in this way, the dust cover 1 for the vehicle lamp can be installed on the vehicle lamp.

Next, the partition 20 will be described.

The partition wall 20 is installed in the space 15 formed inside the housing 10 to divide the space 15 into a plurality of divided spaces 17 .

Specifically, the partition wall 20 may be formed in a shape in which a plurality of flat plates erected in a direction perpendicular to the lower surface 11 cross each other and installed in the space 15 .

5 is a view showing a partition wall installed in the housing.

For example, as shown in FIG. 5, the partition wall 20 is formed by two flat plates erected in a direction perpendicular to the lower surface 11 crossing each other to form a cross shape, and is installed in the space 15 to form a space ( 15) can be divided into four divided spaces 17.

And, although not shown in the drawing, the bulkhead 20 is formed in a shape in which three or more flat plates erected in a direction perpendicular to the lower surface 11 cross each other, and is installed in the space 15 to cover the space 15. It can be divided into a plurality of divided spaces (17).

In addition, the partition wall 20 is formed in a shape in which a plurality of curved plates erected in a direction perpendicular to the lower surface 11 cross each other, and is installed in the space 15 to divide the space 15 into a plurality of divided spaces 17 can also be divided into

6 is a view showing another shape of a partition wall installed in a housing.

For example, referring to FIG. 6, the partition wall 20 is formed in a shape in which two curved plates erected in a direction perpendicular to the lower surface 11 cross each other, and is installed in the space 15 to form a space ( 15) can be divided into four divided spaces 17.

At this time, axes formed by crossing a plurality of flat plates constituting the barrier rib 20 may be the same or different.

The plurality of divided spaces 17 formed by the partition wall 20 may have the same or different volumes. When the axes formed by crossing the plurality of flat plates constituting the partition wall 20 are the same, It is easy to divide the space 15 so that the volumes of the two divided spaces 17 are equal to each other.

Meanwhile, as shown in FIG. 5 , the height of the barrier rib 20 may be lower than the height of the housing 10 by a predetermined length l ₁ .

In this way, the height of the partition wall 20 is formed lower than the height of the housing 10 by a predetermined length (l ₁ ), so that when the sponge 40 is installed on the upper part of the partition wall 20, the sponge 40 is attached to the housing 10. ) can be prevented from protruding higher than the top of.

Next, the moisture absorbent 30 will be described.

As shown in FIG. 3, the moisture absorbent 30 may be installed inside each divided space 17 formed by the partition wall 20, and may be in various forms such as powder form, granule form, pellet form, tablet form, disk form, etc. Although it may be formed into a shape, it is preferably formed into a powdery form. This is because when the moisture absorbent 30 is formed in a powder form, the moisture absorption area becomes relatively larger than that of the conventional moisture absorbent contained and fixed inside the pouch.

The desiccant 30 may perform a function of absorbing moisture when the humidity around the desiccant 30 is high and releasing moisture when the humidity around the desiccant 30 is low, and the moisture absorption rate is high and the moisture release rate is low. It is desirable to configure

And, when the moisture absorbent 30 is installed inside the divided space 17, it may be installed inside each divided space 17 to fill each divided space 17 at a predetermined ratio.

For example, the desiccant 30 may be installed inside each divided space 17 so as to fill each divided space 17 by 80% or less, and each divided space 17 by 20% or more 75%. It may be installed inside each divided space 17 to fill up to % or less, preferably installed inside each divided space 17 to fill each divided space 17 by 30% or more and 70% or less. .

As such, the desiccant 30 does not completely fill each of the divided spaces 17 but fills the divided spaces 17 by a predetermined ratio, thereby forming an empty space in which the desiccant 30 can flow inside the divided spaces 17 . In addition, the moisture absorbent 30 can be uniformly mixed while flowing inside each divided space 17 thanks to this free space, so that the moisture absorption ability of the moisture absorbent 30 can be improved.

The moisture absorbent 30 may include a curable inorganic material including at least one or more moisture absorbing materials selected from the group consisting of magnesium chloride, calcium chloride and sodium carbonate, and at least one selected from the group consisting of magnesium oxide and calcium oxide.

In the moisture absorbent 30, the weight ratio of the hygroscopic material to the curable inorganic material may be 1:0.1 to 2, preferably 1:0.2 to 1.5, and more preferably 1:0.4 to 1.5.

When the moisture absorbent 30 is configured as described above, the moisture absorption rate of the moisture absorbent 30 may be high and the moisture release rate may be low.

The moisture absorbing agent 30 includes a moisture absorbing material including at least one selected from the group consisting of magnesium chloride, calcium chloride and sodium carbonate in order to have moisture absorbing ability. Preference is given to using magnesium chloride. Magnesium chloride not only has excellent water absorption ability, but also has excellent water absorption speed and water absorption sustained ability and low water release ability when combined with other components.

The magnesium chloride may be included in an amount of 10 to 50% by weight, preferably 20 to 45% by weight, and more preferably 25 to 40% by weight, based on the total weight of the moisture absorbent 30. When magnesium chloride is included in the desiccant 30 in such a ratio, the rate of absorbing moisture of the desiccant 30 is optimized, it is possible to prevent deterioration in the continuity of absorbing moisture due to excessive absorbing moisture, and to effectively suppress the release of moisture. can do.

The moisture absorbent 30 includes a curable inorganic material including at least one selected from the group consisting of magnesium oxide and calcium oxide in order to prevent the moisture absorbent 30 from being liquefied and hardened when it absorbs moisture.

The curable inorganic material includes two types of magnesium oxide having different specific gravity, thereby optimizing the moisture absorption rate of the moisture absorbent 30, enabling the moisture absorbent 30 to have a continuous moisture absorption ability for a long time, and When the temperature rises rapidly, it may have an effect of preventing moisture absorbed by the absorbent 30 from being released.

Meanwhile, the moisture absorbing agent 30 may include a polymer wax in addition to a moisture absorbing material and a curable inorganic material.

Since the moisture absorbent 30 contains polymer wax, not only its ability to absorb moisture is improved, but also the release of moisture can be minimized in an environment of high temperature and low humidity, and it can have a continuous ability to absorb moisture.

And, the moisture absorbent 30 may further include an alkali metal phosphate.

The alkali metal phosphate included in the moisture absorbent 30 may be an alkali metal ion selected from lithium, sodium and potassium. Since the moisture absorbent 30 includes an alkali metal phosphate, expansion due to moisture absorption can be effectively suppressed, and moisture can be absorbed for a long time even in a high-humidity environment.

Next, the sponge 40 will be described.

The sponge 40 may be composed of a conventional sponge and may be installed above the partition wall 20 to cover the divided space 17 in which the moisture absorbent 30 is installed. And, the sponge 40 may be installed on the partition wall 20 so that the outer circumferential surface of the sponge 40 comes into contact with the inner circumferential surface of the housing 10 .

7 is a view showing a sponge, and FIG. 8 is a view showing a sponge installed on an upper part of a partition wall.

For example, referring to FIGS. 7 and 8 , when the cross section of the housing 10 horizontal to the lower surface 11 is circular, the sponge 40 has a disk shape having a predetermined height l ₂ . It may be formed and installed on the upper part of the partition wall 20.

At this time, by forming the sponge 40 such that the height (l ₂ ) of the sponge 40 is less than a predetermined length (l ₁ ), which is the distance between the upper part of the partition wall 20 and the upper part of the housing 10, the partition wall ( 20) When the sponge 40 is installed on the upper portion, the sponge 40 may be prevented from protruding higher than the upper portion of the housing 10.

Next, the breathable film 50 will be described.

The breathable film 50 does not transmit the moisture absorbent 30, but may be formed of a material that allows air containing moisture to pass through, and may be installed on the top of the housing 10 to cover the open top of the housing 10. can

9 is a view showing a breathable film installed on the top of the housing.

Specifically, as shown in FIG. 9 , the breathable film 50 may be installed on the top of the housing 10 to cover the sponge 40 installed on the top of the partition wall 20 . At this time, as a method of installing the air permeable film 50 on the upper part of the housing 10, the air permeable film 50 is applied to the upper part of the housing 10 by using a method such as heat fusion bonding, high frequency bonding, adhesive bonding, or the like. There may be a way to connect.

The breathable film 50 may be formed of a material having a water vapor permeability indicating the degree to which water vapor in the air passes through the breathable film 50 and a water resistance pressure, which is a pressure at which water or liquid can pass through the breathable film 50, may be formed of a material having a predetermined value. have.

For example, the breathable film 50 may have a moisture permeability of 5 to 600 g/m ² /h, a water pressure resistance of 1 to 30 cmH ₂ O/min, and preferably a moisture vapor transmission rate of 10 to 500 g/m. ² /h, water resistance may be 5 to 25 cmH ₂ O / min, more preferably water vapor permeability is 20 to 400 g / m ² /h, water pressure may be 10 to 20 cmH ₂ O / min. can be formed as At this time, the moisture permeability is a value measured according to KS K 0594, and the water resistance is a value measured according to ISO 811-1981.

Since the breathable film 50 is formed of a material having a moisture permeability within this range, the rate at which the moisture absorbent 30 absorbs moisture is controlled, and the lifespan of the dust cover 1 for automobile lamps can be increased. In addition, since the air permeable film 50 is formed of a material having a water resistance within this range, liquid such as water formed inside the dust cover 1 for an automobile lamp penetrates the air permeable film 50 and flows into the interior of the automobile lamp. can be effectively prevented.

In addition, the breathable film 50 may be formed of a material having predetermined values of permeability and tensile strength indicating the degree of air permeation through the breathable film 50 .

For example, the breathable film 50 may have an air permeability of 500 to 700 ml/min and a tensile strength of 140 to 210 N/2.54 cm, preferably an air permeability of 450 to 650 ml/min, It may be formed of a material having a strength of 150 to 190 N/2.54 cm, more preferably an air permeability of 400 to 600 ml/min, and a tensile strength of 160 to 180 N/2.54 cm. At this time, the air permeability is a value measured by ISO 5636-3, and the tensile strength is a value measured by ISO 1924-2 and is a value that satisfies both MD (Machine Direction) and CD (Cross Direction).

Since the breathable film 50 is formed of a material having air permeability within this range, more air is transmitted through the breathable film 50 and the moisture absorbent 30 can absorb more moisture contained in the air. And, since the breathable film 50 is formed of a material having a tensile strength within this range, it has high durability so as not to be easily torn and can be used for a long period of time.

When the breathable film 50 is formed of an object having moisture permeability, water resistance pressure, air permeability, and tensile strength within the above ranges, the material is not limited, but may be formed of a material such as polymer cloth or paper, preferably. Preferably, it may be formed of polyolefin-based polymers and polyester-based polymers.

Hereinafter, the action and effect of the dust cover 1 for a vehicle lamp according to the present invention will be described.

In the dust cover 1 for automobile lamps, a partition wall 20 is installed in a space 15 formed in a housing 10 . As the partition wall 20 is installed in this way, the space 15 is divided into a plurality of divided spaces 17 .

In addition, the absorbent 30 is installed in each divided space 17, the sponge 40 is installed on the upper part of the partition wall 20 to cover the divided space 17, and the housing 10 covers the sponge 40. ) An air permeable film 50 is installed on top of the.

The dust cover 1 for automobile lamps configured as described above may be coupled to the automobile lamp. In general, the dust cover 1 for automobile lamps is erected so that the lower surface 11 of the housing 1 is in a direction perpendicular to the ground. It is coupled to the car lamp in the state.

Therefore, when the dust cover 1 for the automobile lamp is coupled to the automobile lamp, the absorbent 30 installed in each divided space 17 is directed toward the breathable film 50, and the absorbent directed toward the breathable film 50 ( 30) expands as it absorbs moisture.

The expanding moisture absorbent 30 may push the air permeable film 50 to inflate the air permeable film 50, but the dust cover 1 for a vehicle lamp according to an embodiment of the present invention includes the bulkhead 20 and the sponge. By providing (40), even if the moisture absorbent 30 concentrated toward the breathable film 50 expands, the breathable film 50 can be prevented from expanding.

FIG. 10 is a view showing a dust cover for an automobile lamp in which a moisture absorbent is directed toward a breathable film and no sponge is installed, and FIG. 11 is a dust cover for a vehicle lamp in which a barrier rib and a sponge are installed in which a moisture absorbent is directed toward a breathable film. it is a drawing

Specifically, as shown in FIG. 10 , in the dust cover for a vehicle lamp in which the partition wall 20 and the sponge 40 are not installed, the moisture absorbent 30 directed toward the air permeable film 50 expands while the air permeable film 50 is pushed, and as a result, the breathable film 50 expands.

However, as shown in FIG. 11, the dust cover 1 for automobile lamps in which the barrier 20 and the sponge 40 are installed can prevent the breathable film 50 from expanding even when the moisture absorbent 30 absorbs moisture. can

This is because the moisture absorbent 30 is dispersed and accommodated in each divided space 17 divided by the partition wall 20, thereby reducing the amount of the moisture absorbent 30 toward the air permeable film 50.

In addition, when the moisture absorbent 30 in contact with the sponge 40 absorbs moisture and expands, the sponge 40 is compressed by the volume of the moisture absorbent 30 to expand, preventing the breathable film 50 from expanding. to be.

Figure 12a is a graph showing the expansion thickness of a breathable film according to the moisture absorption and release cycle of the dust cover for automobile lamps in which the sponge is installed, and Fig. 12b is a graph showing the moisture absorption and release cycle of the dust cover for automobile lamps in which the sponge is not installed It is a graph showing the expansion thickness of the breathable film.

Such an effect can be seen through the graphs shown in FIGS. 12A and 12B. Specifically, as shown in FIG. 12A , it can be seen that the breathable film 50 of the dust cover 1 for automobile lamps to which the sponge 40 is installed does not expand even when the cycle of absorbing and releasing moisture increases.

In contrast, as shown in FIG. 12B , it can be seen that the air permeable film 50 expands as the cycle of absorbing and releasing moisture increases 22 times or more in the dust cover for automobile lamps to which the sponge 40 is not installed.

Meanwhile, since the dust cover 1 for an automobile lamp according to an embodiment of the present invention includes the sponge 40, the absorption rate of moisture inside the automobile lamp is also improved.

13 is a graph showing moisture absorption rates according to moisture absorption and discharge cycles of a dust cover for an automobile lamp with a sponge and a dust cover for an automobile lamp without a sponge.

Specifically, as shown in FIG. 13, the dust cover 1 for automobile lamps to which the sponge 40 is installed has a moisture absorption rate when the cycle of absorbing and releasing moisture is increased compared to the dust cover for automobile lamps to which the sponge is not installed. It can be seen that this higher

14 is a table showing the moisture absorption rate and the expansion thickness of the air permeable film of a dust cover for a car lamp with a sponge and a dust cover for a car lamp without a sponge.

Referring to the table of FIG. 14, the dust cover 1 for automobile lamps to which the sponge 40 is installed has an improved moisture absorption rate in the interior of the automobile lamp, compared to the dust cover for automobile lamps without the sponge 40, and provides a breathable film 50. It is easier to see that there is no expansion of .

On the other hand, unlike the dust cover 1 for automobile lamps according to an embodiment of the present invention in which the sponge 40 is installed on the upper part of the partition wall 20, there may be a dust cover for automobile lamps in which the partition wall is made of sponge.

15 is a view showing a dust cover in which a partition wall is made of sponge and no sponge is installed on the upper part of the partition wall.

For example, in the dust cover 1000 shown in FIG. 15, the partition wall 1200 installed inside the housing 1000 is made of sponge, and the sponge is not installed on the upper part of the partition wall 1200, and the air permeable film 1500 is formed. configured to be installed.

However, the dust cover 1000 constructed as described above has a lower moisture absorption rate than the dust cover 1 for automobile lamps, and the breathable film expands more than that of the dust cover 1 for automobile lamps.

16 is a table showing moisture absorption rates and expansion thicknesses of air permeable films of a dust cover in which a partition wall is made of sponge and no sponge is installed on the upper part of the partition wall, and a dust cover for an automobile lamp in which a sponge is installed on the upper part of the partition wall.

Specifically, as shown in the table of FIG. 16, the dust cover 1 for automobile lamp absorbs moisture inside the automobile lamp at a higher rate as the cycle of absorbing and releasing moisture increases compared to the dust cover 1000. Able to know.

In the dust cover 1000, the breathable film 1200 expands as the cycle of absorbing and releasing moisture increases 16 times or more, but the dust cover 1 for a vehicle lamp 1000 expands even if the cycle of absorbing and releasing moisture increases. ) is not inflated.

As described above, the dust cover for an automobile lamp according to the present invention provides an effect of effectively removing moisture inside the automobile lamp by absorbing moisture introduced by the moisture absorbent accommodated in the divided space inside the housing through the air permeable film.

In addition, since the moisture absorbent is installed in each divided space inside the housing divided by the partition wall, the amount of the moisture absorbent concentrated toward the breathable film is reduced even when the housing is tilted, so that the breathable film expands even when the moisture absorbent absorbs moisture and expands. provides a preventive effect.

In addition, since the sponge is configured to cover the divided space in which the desiccant is installed, when the desiccant in contact with the sponge absorbs moisture and expands, the sponge is compressed by the volume in which the desiccant expands, thereby preventing the breathable film from expanding. .

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present invention.

1: Dust cover for car lamp
10: housing
11: lower surface
13: side
20: bulkhead
30: moisture absorbent
40 : Sponge
50: breathable film

Claims (15)

A housing having a lower surface and a side surface so that a space is formed therein, the upper part of which is open;
partition walls installed inside the space to divide the space into a plurality of divided spaces;
a moisture absorbent installed inside each of the divided spaces;
a sponge installed on an upper portion of the partition wall to cover the divided space; and
And a breathable film installed on the upper part of the housing to cover the sponge,
The height of the bulkhead is lower than the height of the housing by a predetermined length,
The dust cover for an automobile lamp, wherein the sponge is installed on an upper part of the bulkhead so that an outer circumferential surface of the sponge comes into contact with an inner circumferential surface of the housing.
According to claim 1,
The lower surface is formed flat,
The side surface is formed by connecting a plurality of flat surfaces to each other, formed by connecting a plurality of curved surfaces to each other, or formed by a curved surface forming a closed loop.
According to claim 2,
The housing is a dust cover for an automobile lamp, wherein a cross section parallel to the lower surface is formed in any one of a polygonal shape, an elliptical shape, and a circular shape.
According to claim 3,
The partition wall is formed in a shape in which a plurality of flat plates erected in a direction perpendicular to the lower surface cross each other.
According to claim 4,
An axis formed by crossing the plurality of flat plates is the same, a dust cover for an automobile lamp.
According to claim 3,
The partition wall is formed in a shape in which a plurality of curved plates erected in a direction perpendicular to the lower surface cross each other.
According to claim 6,
An axis formed by crossing the plurality of curved plates with each other is the same, a dust cover for an automobile lamp.
delete delete According to claim 1,
The dust cover for an automobile lamp, wherein the height of the sponge is equal to or less than the predetermined length.
According to claim 10,
The partition wall is formed so that the volumes of the plurality of divided spaces are equal to each other, a dust cover for an automobile lamp.
According to claim 11,
The dust cover for automobile lamps, wherein the moisture absorbent is installed inside each of the divided spaces so as to fill each of the divided spaces at a predetermined rate or less.
According to claim 12,
The predetermined ratio is 80%, a dust cover for an automobile lamp.
According to claim 11,
The moisture absorbent,
at least one or two or more hygroscopic substances selected from the group consisting of magnesium chloride, calcium chloride and sodium carbonate;
A curable inorganic material containing at least one selected from the group consisting of magnesium oxide and calcium oxide; and
A dust cover for automobile lamps comprising alkali metal phosphate.
According to claim 14,
The moisture absorbent further comprises a polymer wax, a dust cover for an automobile lamp.

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