KR20150061813A

KR20150061813A - Automotive headlamp

Info

Publication number: KR20150061813A
Application number: KR1020130145996A
Authority: KR
Inventors: 김정은
Original assignee: 현대모비스 주식회사
Priority date: 2013-11-28
Filing date: 2013-11-28
Publication date: 2015-06-05

Abstract

The headlamp for a vehicle according to an embodiment of the present invention includes a lamp housing, a light source housed in the lamp housing, and a valve provided in the lamp housing, wherein the valve is opened and closed according to a temperature change inside the lamp housing .

Description

[0001] Automotive headlamp [0002]

The present invention relates to a headlamp for a vehicle.

The car's headlamps are mounted at the front left and right sides of the car body so that the car can travel safely at night, irradiating the light from the lamps forward.

It is desirable that the head lamp is kept in a clean state in which moisture and the like are not condensed on the lens in order to secure a good watch. However, due to the temperature difference between the inside and the outside of the headlamp, water condensation water is generated on the inner side of the lens.

This is because the moisture contained in the air inside the head lamp is cooled and agitated in contact with a lens which is relatively low temperature. In order to prevent this, there is known a method for rapidly removing moisture from the inside and preventing condensation of the remaining moisture.

That is, there is known a method in which cold outside air is introduced through an air inlet, and air circulated in the head lamp is discharged to the outside through an air outlet.

The filter 22 can be inserted into the air discharge tube 20 (see FIG. 5), the cap 24 is put on the mounting end 18 protruding from the air discharge port 16, The membrane 26 may be sandwiched (see Fig. 6).

According to this conventional technology, since the amount of air flow is independent of the state of the engine room or the state of the outside air, when the engine room is hot and humid, there is a problem that the amount of the humidifier inflow is excessive,

An object of the present invention is to provide a headlamp for a vehicle which can prevent condensation of a humidifier by rapidly discharging a humidifier according to a temperature change of air.

Meanwhile, the valve may include a cylinder that communicates with the inside and the outside of the lamp housing, a piston provided in the cylinder, and an actuator that drives the piston.

On the other hand, the actuator shrinks if the air in the lamp housing is above a predetermined temperature and can extend when the air is below the predetermined temperature.

On the other hand, the actuator may be a shape memory alloy.

The piston includes a body connected to the actuator and a head extending from the body and provided outside the lamp housing. The valve includes an exhaust hole surrounding the head, And may further include a protruding blocking wall.

On the other hand, the head has a cylindrical shape, the blocking wall has a plurality of exhaust holes, and the exhaust holes can be arranged at equal intervals.

According to the headlamp for a vehicle according to an embodiment of the present invention, condensation of the humidifier can be prevented by rapidly discharging the humidifier according to the temperature change of the air.

1 is a schematic sectional view of a vehicle headlamp according to an embodiment of the present invention,
Fig. 2 is a schematic sectional view showing a valve closed state of Fig. 1,
FIG. 3 is a schematic sectional view showing a state in which the valve of FIG. 1 is opened;
Figure 4 is a partial top view of the valve of Figure 1;
5 is a schematic cross-sectional view of a vehicle headlamp according to the prior art,
6 is a schematic cross-sectional view of a vehicle headlamp according to still another conventional technique.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description and the accompanying drawings, substantially the same components are denoted by the same reference numerals, respectively, and redundant description will be omitted. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

In this specification, a singular form may include plural forms unless specifically stated in the phrase. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

1 is a schematic sectional view showing a headlamp for a vehicle according to an embodiment of the present invention. Fig. 2 is a schematic sectional view showing the valve of Fig. 1 in a closed state, Fig. 3 is a schematic cross-sectional view showing the valve of Fig. 1 in an open state, and Fig. 4 is a partial plan view of the valve of Fig.

1 to 4, a vehicle headlamp according to an embodiment of the present invention includes a lamp housing 101, a light source 103, and a valve 105.

The lamp housing 101 forms an outer shape of a headlamp for a vehicle, and is disposed at a front end portion of the vehicle. An external lens 107 may be provided at a front portion of the lamp housing 101.

The light source 103 is embedded in the lamp housing 101 to generate light and emits the generated light to the outside of the lamp housing 101. The light source 103 may be surrounded by a reflection plate 109. Meanwhile, an inner lens 111 may be provided between the light source 103 and the outer lens 107.

The light emitted from the light source 103 is reflected by the reflection plate 109 and irradiated forward. As the light source 103, a light emitting diode (LED) that consumes less power than the brightness of light may be used, but the present invention is not limited thereto.

The valve 105 is provided in the lamp housing 101. For example, the valve 105 may be provided behind the light source 103. On the other hand, the valve 105 is opened and closed in accordance with the temperature change inside the lamp housing 101.

The valve 105 includes a cylinder 201, a piston 203 and an actuator 205. The cylinder 201 communicates the inside and the outside of the lamp housing 101. Specifically, the air inlet 207 formed on the inner circumferential surface of the lamp housing 101 and the air outlet 209 formed on the outer circumferential surface are connected by the cylinder 201. Accordingly, air in the lamp housing 101 flows into the air inlet 207, moves along the cylinder 201, and then flows out through the air outlet 209. [

The piston 203 can open or close the valve 105 by moving along the cylinder 201. The piston 203 includes a body 211 and a head 213.

The body 211 has a structure capable of linear motion in the cylinder 201. For example, the body 211 may have a cylindrical shape. Since the lower part of the body 211 is connected to the actuator 205, the body 211 can move according to the driving of the actuator 205.

The head 213 extends from the body 211 and is provided outside the lamp housing 101. The head 213 may have a structure wider than the body 211. For example, the head 213 may be formed in a cylindrical shape having a larger diameter than the body 211.

On the other hand, a blocking wall 215 surrounding the head 213 may be further provided. The blocking wall 215 has an exhaust hole 217 as a structure protruding outward from the lamp housing 101. The exhaust holes 217 are formed on the outer circumferential surface of the lamp housing 101 at a predetermined height of the bolt, and may be disposed at a same interval. On the other hand, the inner peripheral surface of the blocking wall 215 can be brought into close contact with the outer peripheral surface of the head 213.

The actuator 205 drives the piston 203. The actuator 205 is provided around the air inlet 207 of the lamp housing 101 and can be supported by the support body 206.

On the other hand, the actuator 205 can contract or expand according to the temperature of air in the lamp housing 101. For example, when the air in the lamp housing 101 is above the predetermined temperature, the actuator 205 contracts, and when the temperature is lower than the predetermined temperature, the actuator 205 can extend. The actuator 205 may be made of a shape memory alloy so as to contract or elongate according to the temperature of the air.

Referring again to FIG. 2, when the temperature of the air inside the lamp housing 101 is equal to or higher than a predetermined temperature, the actuator 205 maintains the contracted state. The head 213 of the piston 203 is maintained in close contact with the outer peripheral surface of the lamp housing 101 and the inner peripheral surface of the blocking wall 215. [ In this case, since the head 213 of the piston 203 blocks the exhaust hole 217 (see FIG. 4) of the blocking wall 215, the air inside the lamp housing 101 can not flow out. That is, the valve 105 is in a state of being shut off.

Referring again to FIG. 3, when the air inside the lamp housing 101 is below a predetermined temperature, the actuator 205 expands. The actuator 205 pushes up the body 211 of the piston 203 while stretching. The head 213 ascends along the inner circumferential surface of the blocking wall 215 from the outer circumferential surface of the lamp housing 101. [ In this process, the air outlet 209 is opened. When the head 213 further rises, the exhaust hole 217 (see Fig. 4) of the blocking wall 215 is opened. That is, the valve 105 is opened.

As a result, the air that has flowed out along the open air outlet 209 flows out of the lamp housing 101 through the exhaust hole 217 (see FIG. 4). In this process, the moisture mixed with the air is discharged to the outside together with the air.

As described above, according to the present embodiment, when the air inside the lamp housing 101 is lower than the predetermined temperature, the air is discharged to the outside, so that moisture can be discharged to the outside. Consequently, condensation of moisture inside the lamp housing is prevented.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

100: lamp housing 103: light source
105: valve 201: cylinder
203: piston 205: actuator
207: air inlet 209: air outlet
211: body 213: head
215: blocking wall 217: exhaust hole

Claims

Lamp housing,
A light source housed in the lamp housing, and
The valve housed in the lamp housing
Lt; / RTI >
Wherein the valve is opened or closed in accordance with a temperature change inside the lamp housing.

The method of claim 1,
Wherein the valve comprises:
A cylinder for communicating the inside and the outside of the lamp housing,
A piston provided in the cylinder, and
An actuator for driving the piston
And the headlamp.

3. The method of claim 2,
Wherein the actuator shrinks when air in the lamp housing is above a predetermined temperature, and extends when the air in the lamp housing is below the predetermined temperature.

3. The method according to claim 2 or 3,
Wherein the actuator is a shape memory alloy.

5. The method of claim 4,
The piston,
A body coupled to the actuator, and
A lamp housing extending from the body,
Lt; / RTI >
Wherein the valve comprises:
And a blocking wall surrounding the head and having an exhaust hole to protrude from the lamp housing.

The method of claim 5,
The head is cylindrical,
The blocking wall has a plurality of exhaust holes,
Wherein the exhaust holes are arranged at equal intervals.