KR20220069645A - Lamp for vehicle - Google Patents

Abstract

The present disclosure relates to a lamp for a vehicle. The lamp includes: a light source; a base plate on which the light source is mounted; a heat dissipation unit including a heat sink provided on the base plate; and a lens unit which is coupled to the heat dissipation unit and projects the light generated from the light source unit to the outside, wherein the heat sink protrudes from the base plate and includes a plurality of heat sink spaced apart from each other, and is provided radially from the center of the base plate so that the distance between the plurality of heat dissipation fins increases toward the outside. The present invention provides a lamp for a vehicle which improves heat dissipation performance.

Description

Lamp for vehicle {LAMP FOR VEHICLE}

The present invention relates to a vehicle lamp, and more particularly, to a vehicle lamp with improved heat dissipation efficiency through optimization of a heat sink shape.

In general, a vehicle is provided with various types of lamps having a lighting function for easily identifying an object located around the vehicle during night driving and a signal function for notifying other vehicles or road users of the driving state of the vehicle.

For example, headlamps (headlights or headlamps) and fog lamps mainly for the purpose of lighting functions, and turn signal lamps, tail lamps, brake lamps, side markers, etc. In order to fully demonstrate each function, these vehicle lamps are regulated by laws and regulations regarding their installation standards and standards.

In vehicle lamps, halogen or HID has been used as a light source, but recently, LED is used as a light source. LED reduces eye fatigue and minimizes the size of the lamp, so it not only increases the design freedom of the vehicle lamp, but also has economic feasibility due to its semi-permanent lifespan.

However, when an LED is used as a light source for a vehicle lamp, there is a problem in that light distribution and high-temperature operation reliability are deteriorated due to the heat of the LED. Recently, as high-performance LEDs are used in vehicle lamps, the amount of heat generated has increased. As a result, there is a problem in that the LED luminous efficiency is lowered. Therefore, there is a need to design a heat dissipation structure that can efficiently dissipate heat from a vehicle lamp using a light source having a high calorific value, such as LED.

The present invention has been devised to solve the above problems, and it is an object of the present invention to provide a vehicle lamp that improves the heat dissipation performance by improving the shape of the heat dissipation fin provided in the heat dissipation unit and disposing the heat dissipation fan at the rear end of the heat sink.

Another object of the present invention is to provide a vehicle lamp that maximizes heat dissipation performance by improving the shape of the heat sink and the lens holder so that the light source unit is directly cooled by the air flowing by the heat dissipation fan.

Another object of the present invention is to reduce the cost by reducing the size of a heat sink according to the optimization of heat dissipation performance and to provide a vehicle lamp that can be used in common for various lamp modules.

In order to achieve the above object, a vehicle lamp according to the present invention includes a light source unit, a base plate to which the light source unit is mounted, a heat dissipation unit having a heat sink provided on the base plate, and the heat dissipation unit coupled to the light source unit. a lens unit for projecting the generated light to the outside, wherein the heat sink includes a plurality of heat dissipation fins protruding from the base plate and arranged to be spaced apart from each other; It is provided in a wide radial shape.

The heat dissipation unit may further include a heat dissipation fan provided on one side of the heat sink to generate air flow.

The heat dissipation fan may be disposed on an extension line of the optical axis of the lens unit and may be mounted in a direction opposite to the direction of the heat sink toward the base plate.

The vehicle lamp according to the present invention can improve the heat dissipation performance by improving the shape of the heat dissipation fin provided in the heat dissipation unit and disposing the heat dissipation fan at the rear end of the heat sink.

In addition, according to the present invention, the heat dissipation performance can be maximized by improving the shape of the heat sink and the lens holder so that the light source unit is directly cooled by the air flowing by the heat dissipation fan.

In addition, according to the present invention, the heat dissipation unit can reduce the size of the heat sink according to the optimization of the heat dissipation performance, thereby reducing the cost.

In addition, according to the present invention, since it is possible to reduce the volume of the heat sink, there is an advantage that can be commonly used for various lamp modules.

1 is a perspective view showing a vehicle lamp according to an embodiment of the present invention.
FIG. 2 is an enlarged perspective view of a part of the vehicle lamp shown in FIG. 1 .
3 is a rear view of a vehicle lamp according to an embodiment of the present invention as viewed from the rear.
4 is a view illustrating a flow of air in a heat sink of a vehicle lamp according to an embodiment of the present invention.
5 is an enlarged cross-sectional perspective view of a vehicle lamp according to an embodiment of the present invention.
6 is an enlarged cross-sectional perspective view of a part of FIG. 5 , and is a view for explaining a second heat sink and a guide unit.
7 is a perspective view illustrating a lens holder according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the embodiments described below are suitable for understanding the technical characteristics of the vehicle lamp of the present invention. However, the present invention is not limited to the embodiments described below, or the technical features of the present invention are not limited by the described embodiments, and various modifications are possible within the technical scope of the present invention.

1 is a perspective view illustrating a vehicle lamp according to an embodiment of the present invention, and FIG. 2 is an enlarged perspective view of a part of the vehicle lamp shown in FIG. 1 . In addition, FIG. 3 is a rear view of the vehicle lamp according to an embodiment of the present invention, as viewed from the rear, and FIG. 4 is a view showing the flow of air in the heat sink of the vehicle lamp according to the embodiment of the present invention. 5 is an enlarged cross-sectional perspective view of a vehicle lamp according to an embodiment of the present invention, and FIG. 6 is an enlarged cross-sectional perspective view of a part of FIG. 7 is a perspective view showing a lens holder according to an embodiment of the present invention.

1 to 8 , a vehicle lamp 100 according to an embodiment of the present invention includes a light source unit 200 , a heat dissipation unit 400 , and a lens unit 300 .

The light source unit 200 may include a single or a plurality of light sources (not shown) for irradiating light. Here, the type and characteristics of the light source may be applied without limitation. For example, a light emitting diode (LED), which is a semiconductor light emitting device, may be used as the light source, and a plurality of LEDs emitting light of the same or different colors according to required conditions and design specifications may be used. However, the light source applied to the present invention is not limited thereto, and as an example, a laser diode, a bulb, a halogen, a xenon (HID), etc. may be used.

For example, the light source unit 200 may include a reflector (not shown) that reflects the light emitted from the light source forward. In addition, the vehicle lamp 100 may further include a shield unit (not shown), and the shield unit selectively blocks a portion of the light generated from the light source unit 200 according to the beam pattern to form various beam patterns.

The heat dissipation unit 400 includes a base plate 410 on which the light source unit 200 is mounted, and a heat sink 430 provided on the base plate 410 .

Specifically, the heat dissipation unit 400 may serve to emit heat to prevent a temperature rise due to the high-temperature heat generated by the light source unit 200, and may include a base plate 410 and a heat sink 430. can The base plate 410 may be formed in a plate shape, the light source unit 200 may be mounted on one surface, and the heat sink 430 may be provided on the other surface that is opposite to the one surface.

In addition, the heat dissipation unit 400 may further include a heat dissipation fan 460 provided on one side of the heat sink 430 and generating air flow. For example, the heat dissipation fan 460 may be rotated by external air flowing into the vehicle and may generate an air flow in the lamp by rotation.

The lens unit 300 is coupled to the heat dissipation unit 400 and is provided to project the light generated from the light source unit 200 to the outside.

Specifically, the lens unit 300 may include a lens 310 and a lens holder 330 .

The lens 310 may project light generated from the light source and reflected by the reflector to the front of the vehicle. Here, there is no limitation on the type and characteristics of the lens 310, and various lenses may be applied according to required conditions and design specifications.

In the lens holder 330 , the lens 310 may be fixed and may be coupled to the heat dissipation unit 400 . Specifically, the lens 310 , the lens holder 330 , the base plate 410 , and the heat sink 430 may be sequentially disposed along the optical axis AX of the lens 310 . That is, the lens holder 330 may be coupled to the side facing the lens 310 in front of the base plate 410 , and the heat sink 430 may protrude in the opposite direction to the rear of the base plate 410 , that is, the front. have.

The heat sink 430 may include a plurality of heat dissipation fins 432 and 436 that protrude from the base plate 410 and are spaced apart from each other. In addition, the heat sink 430 may be provided in a radial shape at the center of the base plate 410 so that the distance between the plurality of heat dissipation fins 432 and 436 increases toward the outside.

Specifically, the heat dissipation fins 432 and 436 may be integrally formed with the base plate 410 , and the plurality of heat dissipation fins 432 and 436 may be formed in a plate shape. A flow path for inducing a flow of air generated by the heat dissipation fan 460 may be formed by a gap between the heat dissipation fins 432 and 436 .

Referring to FIGS. 1 to 3 , the heat sink 430 may be radially formed so that the distance between the plurality of heat dissipation fins 432 and 436 increases from the center of the base plate 410 to the outside. Specifically, the plate-shaped heat dissipation fins 432 and 436 may be arranged to be spaced apart from each other in one or a plurality of directions on the base plate 410, and the plurality of heat dissipation fins 432 and 436 may be formed to move away from each other from the center to the outside. The plurality of heat dissipation fins 432 and 436 may be formed in a shape for implementing a radial shape, for example, may be formed to be inclined at different angles or may be formed to be curved toward the end.

The heat sink 430 is formed to increase the distance between the plurality of heat dissipation fins 432 and 436 as the distance from the center of the heat sink 430 increases, thereby moving the high-temperature air at the center of the heat sink 400 to the outside. can promote the flow of As such, the heat dissipation unit 400 increases the utilization of the flow rate generated by the heat dissipation fan 460 , thereby securing a sufficient heat dissipation area, thereby improving heat dissipation performance.

In addition, the heat dissipation unit 400 may reduce the size of the heat sink 430 according to the optimization of heat dissipation performance, thereby reducing the cost.

In addition, according to the embodiment of the present invention, since it is possible to reduce the volume of the heat sink 430, there is an advantage that can be commonly used for various lamp modules.

Meanwhile, the heat dissipation fan 460 is disposed on an extension line of the optical axis AX of the lens unit 300 and may be mounted in a direction opposite to the direction toward the base plate 410 of the heat sink 430 .

Specifically, referring to the drawings, when the direction toward the lens 310 with respect to the heat dissipation unit 400 is referred to as front, and the direction opposite to the front is referred to as rear, the heat dissipation fan 460 is located at the rear of the heat sink 430 . can be mounted As described above, the plurality of heat dissipation fins 432 and 436 are provided to protrude toward the rear of the base plate 410, and the heat dissipation fan 460 is mounted on the rear of the heat sink 430, that is, the heat dissipation fins 432 and 436, so that the heat dissipation fan ( An inflow direction of air by the 460 may be parallel to a direction in which the heat dissipation fins 432 and 436 protrude. That is, the rotation direction of the heat dissipation fan 460 may be provided to be perpendicular to the protruding direction of the heat dissipation fins 432 and 436 .

Accordingly, the heat dissipation unit 400 may maximize the heat exchange efficiency between the air (external air) introduced from the heat dissipation fan 460 and the high temperature air of the heat sink 430 . The heat dissipation efficiency of the heat dissipation unit 400 may be improved by the mounting position of the heat dissipation fan 460 .

Hereinafter, for convenience of description, any one of the directions parallel to the base plate 410 is referred to as a first direction (D1, a vertical direction based on the drawing), and a direction perpendicular to the first direction (D1) is referred to as a second direction (D2, drawing). reference horizontal direction).

The heat sink 430 includes a first heat sink 431 and a second heat sink 435 .

The first heat sink 431 includes a plurality of first heat dissipation fins 432 spaced apart along the first direction D1 to form a flow of air from the center of the heat sink 430 to the outside. can

Hereinafter, for convenience of description, among the regions of the first heat sink 431 , a region in which the flow of air introduced into the first heat sink 431 by the heat dissipation fan 460 starts as a central region is referred to as the first region (A). A region on both sides of the first region A in the second direction D2 is defined as a second region B.

In this case, the interval between the first heat dissipation fins 432 of the second area B may be wider than the interval between the first heat dissipation fins 432 of the first area A. Accordingly, the flow of air from the first area (A) to the second area (B) may be promoted.

In addition, in the second region B, a gap between the plurality of first heat dissipation fins 432 may be provided to increase toward the outside. Accordingly, the air that has moved from the first area A to the second area B can be more effectively discharged to the outside.

For example, at least some of the plurality of first heat dissipation fins 432 in the second region B may be formed to be bent in a direction away from the center of the first direction D1 as the distance from the first region A increases. can Specifically, when referring to the vertical direction shown in FIG. 3 and a heat dissipation fin disposed at the center among the plurality of first heat dissipation fins 432 is referred to as a reference first heat dissipation fin 432, the upper portion of the reference first heat dissipation fin 432 is The positioned first heat dissipation fins 432 may extend toward the ends to be bent upward. In addition, the first heat dissipation fins 432 positioned below the reference first heat dissipation fin 432 may extend toward the end to be bent downward.

In addition, the plurality of first heat dissipation fins 432 may be provided such that the degree of bending increases as they are located farther from the center of the first direction D1 . That is, as the first heat dissipation fins 432 are positioned farther from the reference first heat dissipation fin 432 , the degree of bending in the upward or downward direction may increase.

Since the shape of the first heat dissipation fin 432 provided in the first heat sink 431 is formed as described above, it may be implemented as an optimal shape for discharging high-temperature air to the outside. Specifically, when the flow of air is formed by the heat dissipation fan 460 , the flow of air from the first area A to the second area B may be promoted.

In addition, the air that has moved from the first area (A) to the second area (B) is effectively discharged to the outside of the first heat sink 431 by the shape of the first heat dissipation fin 432 in the second area (B). can be

In addition, by this, the high-temperature air that has passed through the first heat dissipation fin 432 is moved toward the outer surface of the first heat sink 431 , that is, the inner surface of the lamp housing (not shown), thereby uniformly maintaining the temperature difference inside the lamp. can do. Accordingly, it is possible to minimize the occurrence of moisture inside the lamp.

The second heat sink 435 is disposed on one side and the other side of the first heat sink 431 in the first direction D1 and a plurality of second heat dissipation fins 436 are disposed to be spaced apart along the second direction D2. In addition, it may be provided to form a flow of air from the heat sink 430 toward the light source 200 .

Also, the second heat dissipation fin 436 may be provided to be spaced apart from the first heat dissipation fin 432 in the first direction D1 . Specifically, referring to the direction shown in FIG. 3 , the second heat dissipation fin 436 may be provided to be spaced apart from the first heat dissipation fin 432 in an upward or downward direction (first direction D1 ). Also, the plurality of second heat dissipation fins 436 may be arranged to be spaced apart from each other in the left-right direction (the second direction D2 ).

For example, the plurality of second heat dissipation fins 436 may be inclined in a direction away from the center of the second direction D2 as the distance from the first heat dissipation fin 432 increases to form a radial shape. In addition, the plurality of second heat dissipation fins 436 may be provided such that an inclination angle increases as they are located farther from the center of the second direction D2 .

In detail, referring to the vertical and horizontal directions shown in FIG. 3 , the second heat dissipation fins 436 positioned above the first heat dissipation fins 432 may be formed to be inclined away from the center in the upward direction. In addition, the second heat dissipation fins 436 located under the first heat dissipation fin 432 may be formed to be inclined away from the center in the downward direction.

Here, the degree of inclination may increase as the distance from the center of the second direction D2 among the plurality of second heat dissipation fins 436 increases.

Meanwhile, referring to FIGS. 4 to 7 , the lens holder 330 may be provided to flow by the heat dissipation fan 460 to guide the air passing through the second heat sink 435 to the light source unit 200 . That is, as described above, the lens holder 330 is coupled to the lens 310 and the base plate 410 to fix the lens 310 and, at the same time, removes a portion of the air generated by the heat dissipation fan 460 from the light source unit. It may serve as a duct for direct delivery to 200 .

Specifically, the lens holder 330 may include a body portion 331 , a fixing portion 333 , and a guide portion 335 .

The body 331 may form a space S between the base plate 410 and the base plate 410 so that the light source 200 is disposed therebetween.

For example, when the light source is provided as an LED, the substrate 210 on which the LED (light source) is mounted may be attached to the surface of the base plate 410 in the direction toward the lens unit 300 . In addition, the body portion 331 may be provided to be spaced apart from the base plate 410 to form a separation space S in which the light source unit 200 is accommodated.

The fixing part 333 may be formed in a direction opposite to the direction toward the heat dissipation part 400 of the body part 331 , and the lens 310 may be fixed thereto. Here, there is no limitation on the method in which the fixing part 333 is fixed to the lens 310 and may be coupled by, for example, bolt coupling, but is not limited thereto.

The guide portion 335 is formed at one end and the other end of the body portion 331 in the second direction D2 and is provided at a position corresponding to the second heat sink 435 , and includes a second heat sink 435 . The air inlet 336 may be formed so that the air passing through is introduced into the separation space S.

Specifically, the separation space S may be provided to communicate with the second heat sink 435 through the air inlet 336 . Since the second heat dissipation fins 436 are arranged in the second direction D2 (left and right directions based on the drawing), the flow path of air formed between the second heat dissipation fins 436 is from the heat dissipation fan 460 to the air inlet 336 . It can be formed to face.

Here, the guide portion 335 is integrally formed with the upper end and the lower end of the body portion 331 , and the air inlet 336 includes a second heat dissipation fin 436 provided on the first heat dissipation fin 432 , and a first It may be located at a position corresponding to the second heat dissipation fin 436 provided under the heat dissipation fin 432 . In addition, the guide part 335 may be formed in a curved shape to move the air introduced through the air inlet part 336 to the light source part 200 .

The light source and the lens 310 can be directly cooled by the air introduced into the separation space S by the guide part 335 of the lens holder 330, thereby maximizing the cooling efficiency by the heat dissipation unit 400 can be

Meanwhile, the flow of air by the heat dissipation unit 400 according to an embodiment of the present invention will be described below with reference to FIGS. 4 to 6 .

Referring to FIG. 4 , air flowing by the heat dissipation fan 460 may be introduced into the first heat sink 431 and the second heat sink 435 .

Most of the air introduced between the first heat dissipation fins 432 is first introduced into the first area A, which is an area adjacent to the heat dissipation fan 460 . The air introduced into the first area (A) is the difference between the distance between the first heat dissipation fins 432 in the first area (A) and the first heat dissipation fins 432 in the second area (B). Accordingly, it can quickly flow to the second region (B). And, the air introduced into the second region (B) is rapidly discharged in the outer direction of the second heat sink 435 due to the radial shape of the first heat dissipation fin 432 in the second region (B), that is, the inner surface of the lamp housing. can be moved to (see F1 direction in FIG. 4).

Air circulation in the second direction D2 (horizontal direction based on the drawing) occurs inside the lamp by the first heat sink 431 to cool the light source unit 200 . In addition, by minimizing the temperature difference inside the lamp, the generation of moisture inside the lamp can be prevented in advance.

4 to 6 , the air introduced between the second heat dissipation fins 436 may move in a direction away from the first heat dissipation fin 432 (upward direction, downward direction) by the radial shape of the second heat dissipation fin 436 . There is (refer to the F2 direction in Fig. 4). After that, the moved air may be introduced into the air inlet 336 of the lens holder 330 by the flow generated by the heat dissipation fan 460, and is guided by the shape of the guide part 335 to the base plate ( 410) and the body portion 331 can move to the spaced space (S) (refer to the direction of the arrow shown in FIGS. 5 and 6).

The air moved to the separation space (S) directly cools the light source unit 200 and the lens unit 300 , so that the cooling efficiency can be maximized by the heat dissipation unit 400 .

The vehicle lamp according to the present invention can improve heat dissipation performance by improving the shape of the heat dissipation fin provided in the heat dissipation unit and disposing the heat dissipation fan at the rear end of the heat sink.

In addition, according to the present invention, the heat dissipation performance can be maximized by improving the shape of the heat sink and the lens holder so that the light source unit is directly cooled by the air flowing by the heat dissipation fan.

In addition, according to the present invention, the heat dissipation unit can reduce the size of the heat sink according to the optimization of the heat dissipation performance, thereby reducing the cost, and there is an advantage that can be commonly used for various lamp modules.

As mentioned above, although specific embodiments of the present invention have been described above, the spirit and scope of the present invention are not limited to these specific embodiments, and those described in the claims by those of ordinary skill in the art to which the present invention pertains Various modifications and variations are possible without changing the gist of the present invention.

100: vehicle lamp 200: light source unit
210: substrate 300: lens unit
310: lens 330: lens holder
331: body portion 333: fixed portion
335: guide part 336: air inlet
400: heat dissipation unit 410: base plate
430: heat sink 431: first heat sink
432: first heat dissipation fin 435: second heat sink
436: second heat dissipation fin 460: heat dissipation fan
D1: first direction D2: second direction
AX: optical axis A: first area
B: second area S : separation space

Claims (12)

light source unit;
a heat dissipation unit having a base plate on which the light source unit is mounted, and a heat sink provided on the base plate; and
and a lens unit coupled to the heat dissipation unit and projecting the light generated from the light source unit to the outside;
The heat sink includes a plurality of heat dissipation fins protruding from the base plate and arranged to be spaced apart from each other, and the heat sink is provided in a radial shape at the center of the base plate so that the distance between the plurality of heat dissipation fins increases toward the outside.
According to claim 1,
The heat dissipation unit is provided on one side of the heat sink and further comprises a heat dissipation fan for generating air flow.
3. The method of claim 2,
The heat dissipation fan is disposed on an extension line of the optical axis of the lens unit and is mounted in a direction opposite to the direction of the heat sink toward the base plate.
3. The method of claim 2,
When any one of the directions parallel to the base plate is referred to as a first direction and a direction perpendicular to the first direction is referred to as a second direction,
The heat sink is
a first heat sink including a plurality of first heat dissipation fins spaced apart from each other in the first direction to form an outward flow of air from the center of the heat sink; and
and second heat dissipation fins disposed on one side and the other side of the first heat sink in the first direction and disposed to be spaced apart from each other in the second direction to form a flow of air from the heat sink to the light source unit A vehicle lamp including a second heat sink provided.
5. The method of claim 4,
Among the regions of the first heat sink, a central region in which air flow is started by the heat dissipation fan is referred to as a first region, and regions on both sides of the first region in the second direction are referred to as a second region. at the time,
A distance between the first heat dissipation fins in the second area is wider than a distance between the first heat dissipation fins in the first area.
6. The method of claim 5,
In the second area, a distance between the plurality of first heat dissipation fins is provided to increase toward the outside.
6. The method of claim 5,
At least some of the plurality of first heat dissipation fins in the second region are formed to be bent in a direction away from the center of the first direction as the distance from the first region increases,
The plurality of first heat dissipation fins are provided so as to increase the degree of curvature as they are located farther from the center in the first direction.
5. The method of claim 4,
The second heat dissipation fin is provided to be spaced apart from the first heat dissipation fin in the first direction.
5. The method of claim 4,
An interval between the plurality of second heat dissipation fins is provided to increase as the distance from the first heat sink increases.
10. The method of claim 9,
A plurality of the second heat dissipation fins are formed to be inclined in a direction away from the center of the second direction as the distance from the first heat dissipation fin increases to form a radial shape,
The plurality of second heat dissipation fins are provided such that an inclination angle increases as they are located further away from the center in the second direction.
5. The method of claim 4,
the lens unit
lens; and
and a lens holder to which the lens is fixed and coupled to the heat dissipation unit,
The lens holder flows by the heat dissipation fan to guide the air passing through the second heat sink to the light source unit.
12. The method of claim 11,
The lens holder
a body portion forming a separation space between the base plate and the base plate such that the light source portion is disposed therebetween;
a fixing part formed in a direction opposite to the direction toward the heat dissipation part of the body part and to which the lens is fixed; and
A guide formed at one end and the other end of the body portion in the second direction, provided at a position corresponding to the second heat sink, and formed with an air inlet so that air passing through the second heat sink is introduced into the separation space A vehicle lamp containing wealth.

Images