KR20110092096A - Automotive lamp - Google Patents

Abstract

PURPOSE: A vehicle lamp is provided to arrange at least one thin heat emitting plate on a heat emitting spread plate by a laminate structure, thereby drastically increasing efficiency at which heat is transferred from a heat spread plate to the outside. CONSTITUTION: An LED light source unit(120) is arranged on a heat spread plate(130). The LED light source unit includes an LED light source and a printed circuit board which operates the LED light source. A heat emitting unit(140) includes at least one thin heat emitting plate which is vertically inserted into the heat spread plate. The thin heat emitting plate includes a thin plate and an insertion hole which is formed on the thin plate. A bracket(150) supports the heat spread plate.

Description

Automotive Lamps {Automotive Lamp}

The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp that can easily emit heat generated from the light source.

In general, the vehicle is equipped with various lamps having a lighting function and a signal function for informing the driving state of the vehicle to other vehicles or other road users so that the objects in the driving direction can be easily seen at night driving.

Conventional vehicle lamps generally include a light source such as a halogen lamp or a high voltage discharge (HID) lamp. In addition, the vehicle lamp is provided with a reflector (Reflector) for reflecting the light generated from the light source to the front, and the reflective surface of the reflector is deposited by coating a material with a high reflection coefficient such as aluminum or silver powder.

In the related art, a reflector and a lens were separately provided in addition to the light source. Furthermore, the reflector and the lens of the reflector had to be additionally patterned and coated to satisfy various functions such as light reflection, emission, and diffusion. Therefore, the conventional vehicle lamp has the disadvantage that the configuration is complicated, the number of parts, the manufacturing cost increases as the processing step is increased.

Recently, a lamp using a light emitting diode (LED) as a light source has been introduced as a headlamp or an equalizing device, and an attempt to overcome the increase in the conventional complicated lamp construction and processing steps by using the light emitting diode as a light source has been made. Due to the characteristics of the light emitting diode itself, it is a trend to overcome the space problem of the lamp due to the reduced lifespan and small size.

The most vulnerable to light emitting diodes as a light source for a vehicle lamp is temperature. As the performance of the light emitting diode is improved, it emits more heat, and the high temperature heat degrades the performance of the light emitting diode. In other words, the light emitting diode has a rapid decrease in luminous efficiency as the temperature rises, so it is necessary to have a heat radiating device that increases the junction temperature of the light emitting diode itself or lowers the ambient temperature. do.

Accordingly, there is a demand for a method of simplifying the configuration of a lamp and effectively preventing a temperature rise due to heat emitted from the light emitting diode in using the light emitting diode as a light source.

The problem to be solved by the present invention is to provide a vehicle lamp that can easily emit heat generated from the light source.

Problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

One aspect of the vehicle lamp of the present invention for solving the above problems is a heat spread plate LED LED light source is disposed on the upper surface; At least one heat dissipation thin plate coupled to the heat spread plate; And a bracket for supporting the heat spread plate.

Another aspect of the vehicle lamp of the present invention for solving the above problems is an LED light source and a heat spread located at the bottom of the LED light source; At least one rear heat dissipation thin plate coupled to a rear end of the heat spread plate; And at least one shear heat dissipation thin plate fitted to the heat spread plate at a lower end of the front end of the heat spread plate.

Other specific details of the invention are included in the detailed description and drawings.

1 is an exploded perspective view of a vehicle lamp according to an embodiment of the present invention.
2 is a perspective view of a vehicle lamp assembled according to an embodiment of the present invention.
3A is a perspective view illustrating an LED light source unit of a vehicle lamp according to an embodiment of the present invention.
3B is a perspective view of the LED light source unit coupled to the heat spread plate of the vehicle lamp according to an embodiment of the present invention.
4 is a view showing that the heat radiating unit 140 of the vehicle lamp according to an embodiment of the present invention is coupled to the heat spread plate.
5 is a perspective view showing a bracket of a vehicle lamp according to an embodiment of the present invention.
6A to 6C are schematic views illustrating mounting of a heat dissipation unit in a vehicle lamp according to embodiments of the present invention.
Figure 7a is a view schematically showing the mounting of the shear heat dissipation thin plate in the vehicle lamp according to another embodiment of the present invention.
FIG. 7B is a view schematically showing the application of the shear heat dissipation thin plate of FIG. 7A to a vehicle lamp.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, the present invention will be described with reference to the drawings for describing a vehicle lamp according to embodiments of the present invention.

1 is an exploded perspective view of a vehicle lamp according to an embodiment of the present invention, Figure 2 is an assembled perspective view of a vehicle lamp according to an embodiment of the present invention.

Referring to FIG. 1, a vehicle lamp 100 according to an embodiment of the present invention includes an LED light source unit 120, a heat spread plate 130, a heat radiating unit 140, and a bracket 150. can do.

The LED light source unit 120 may include an LED light source and a printed circuit board for driving the LED light source. The LED light source is a light emitter made using a light emitting diode (LED), and serves as a source for irradiating light. The LED light source has low power consumption, which is a characteristic of the light emitting diode, and has excellent durability, and can be mounted and operated in a relatively small space compared to a general vehicle lamp. The printed circuit board is connected to the LED light source and serves to drive the LED light source. On the other hand, the LED light source unit 120 will be described in more detail later.

The heat spread plate 130 receives heat generated from the LED light source of the LED light source unit 120 and propagates in a large area. The heat spreader plate 130 may attach the LED light source unit 120 to the front end of the plate to mount the LED light source unit 120. The heat spreader plate 130 may be positioned to be in contact with the LED light source unit 120 and may be cooled while transferring heat generated from the LED light source unit 120 onto a plate having a large area.

The heat dissipation unit 140 includes one or more heat dissipation thin plates fitted in a vertical state to the heat spread plate 130. Each heat dissipation thin plate is inserted at a predetermined interval in a state perpendicular to the heat spread plate 130 to expand the area in contact with the surrounding air, thereby maximizing heat transfer by convection.

The bracket 150 supports the heat spreader plate 130 supporting the LED light source unit 120. The bracket 150 supports the heat spread plate 130 and serves to support the heat spread plate 130 to be mounted at a predetermined position of the vehicle.

On the other hand, the bracket 150 is to reflect the light irradiated from the LED light source unit 120 to the reflector to irradiate to the outside through the lens, or to directly irradiate the light irradiated from the LED light source unit 120 to the outside through the lens. It may be. As such, the bracket 150 may be configured in a state in which the lens, the lens holder and / or the reflector, or the like are assembled in a single injection molding or in an integrated state, to simplify the assembly process.

2, in one embodiment of the present invention, the LED light source unit 120, the heat spread plate (Heat Spread Plate; 130), the heat dissipation unit 140, the bracket 150, etc. constituting the vehicle lamp 100 are described. It can be combined and assembled without using separate coupling means or coupling parts such as bolts or the like.

As described above, in one embodiment of the present invention, by combining a plurality of components (120, 130, 140, 150) without undergoing a complicated assembly process, it is possible to easily manufacture a vehicle lamp.

3A is a perspective view illustrating an LED light source unit of a vehicle lamp according to an embodiment of the present invention. Referring to FIG. 3A, the LED light source unit 120 according to the exemplary embodiment of the present invention may include a printed circuit board 121, a light source 122, a connector 123, and a printed circuit formed on one surface of the printed circuit board 121. The heat conduction plate 124 may be formed on the opposite side of the surface of the substrate 121 where the light source 122 and the connector 123 are formed. The printed circuit board 121 may be formed of a plate having an appropriate size so that the printed circuit board 121 may be mounted at the front end of the heat spread plate 130 described later.

The light source 122 will be described using a light emitting diode (LED) as an example, and the connector 123 supplies power to the light source 122 or controls the blinking of the light source 122. The controller may be connected to a controller (not shown).

The printed circuit board 121 is connected to the light source 122 and serves to drive the light source 122. The printed circuit board 121 may fix the light source 122 and may apply a predetermined voltage to the light source 122. A hole is formed on the printed circuit board 121, and a conductive material is formed around the hole by plating or the like to connect with a light source terminal (not shown) to apply a driving voltage and to fix the light source 122. Allow them to work together.

When the LED light source unit 120 is attached to the heat spreader plate 130, which will be described later, an alignment protrusion (not shown) is inserted around the printed circuit board 121 to align the position of the printed circuit board 121. An alignment groove 121a may be formed to allow the alignment groove 121a to be formed, and a position at which the alignment groove 121a is formed may correspond to the position of the alignment protrusion (not shown). In addition, the printed circuit board 121 may include an alignment protrusion (not shown) corresponding to the case where an alignment groove (not shown) for alignment is formed when the printed circuit board 121 is attached to the heat spreader plate 130 to be described later.

The heat conduction plate 124 serves to transfer heat generated from the LED light source unit 120 to conduction within a short time. The thermal conductive plate 124 may be integrally bonded to the printed circuit board 121 by a bonding member or the like. For example, the heat conduction plate 124 may be made of copper having high thermal conductivity, but is not limited thereto and may be made of various materials having thermal conductivity.

In addition, since the thermal conductive plate 124 covers the entire area of the printed circuit board 121, the thermal conductivity may be increased. In other words, when the printed circuit board 121 and the heat conduction plate 124 are joined through a joining means such as a bolt, the thermal conductivity is lowered in the region where the joining means is located, while in the embodiment of the present invention, Since 124 covers the entire area of the printed circuit board 121, the thermal conductivity may be minimized.

3B is a perspective view of the LED light source unit coupled to the heat spread plate of the vehicle lamp according to an embodiment of the present invention. Referring to FIG. 3B, the LED light source unit 120 is mounted at the front end of the heat spreader plate 130.

The heat spread plate 130 serves to spread the heat generated from the LED light source unit 120 to a large area. Heat spread plate 130 is a general heat spread (Head Spread), a flow path or the like is formed therein may include a refrigerant to absorb the heat generated from the LED light source unit 120 by heat exchange.

Figure 4 shows that the heat dissipation unit 140 of the vehicle lamp according to an embodiment of the present invention is coupled to the heat spread plate. Referring to FIG. 4, a heat dissipation unit 140 including one or more heat dissipation thin plates 145 may be inserted in a vertical state at a lower end of the heat spread plate 130.

The heat dissipation unit 140 includes one or more heat dissipation thin plates 145 disposed in parallel at predetermined intervals. The heat dissipation thin plate 145 may serve as a cooling fin in heat transfer, and may maximize the contact area with the surrounding air or air to increase the heat transfer effect due to convection. The heat dissipation thin plate 145 may include a thin plate 142 constituting the body and a fitting hole 143 formed in the thin plate 142 to be fitted to the heat spread plate 130.

The thin plate 142 receives heat transferred from the heat spread plate 130 and discharges the heat to the outside. Therefore, the cross sections of the front and rear ends of the thin plate can release heat to the outside by convective heat transfer with the outside air.

The fitting hole 143 has a hole having a substantially same shape as the longitudinal cross-section of the heat spread plate 130 so that the heat dissipation thin plate 145 may be vertically fitted to the heat spread plate 130. The heat dissipation thin plate 145 is inserted into the heat spreading plate 130 by the fitting hole 143 to be in contact with the heat spreading plate 130 so that heat transfer from the heat spreading plate 130 is performed by the heat dissipating thin plate 145.

As described above, in one embodiment of the present invention by coupling the heat dissipation unit 140 composed of one or more heat dissipation thin plates 145 in a vertical state to the heat spread plate 130, heat spreading to the heat spread plate 130 is spread. It can be discharged to the outside efficiently. In addition, for example, when the integrated heat sink fin structure is manufactured by a process such as injection molding and ejected from a mold, it is difficult to eject a thin plate along a relatively long path, thereby gradually reducing the thickness of the heat sink fins. The configuration can be considered. However, this may reduce the number of heat radiation fins that can be disposed in the same space.

In contrast, in the present invention, by placing one or more heat dissipation thin plates 145 into the heat dissipation spread plates 130 in a row in a stacked structure arranged at predetermined intervals, as many heat dissipating thin plates 145 as possible are arranged in a narrow space. The efficiency of transferring heat transferred from the heat spreader plate 130 to the outside may be significantly increased.

5 is a perspective view showing a bracket of a vehicle lamp according to an embodiment of the present invention. Referring to FIG. 5, the bracket 150 of a vehicle lamp according to an embodiment of the present invention basically supports the LED light source unit 120 and the heat spreader plate 130. In addition, the bracket 150 may serve to irradiate light generated from the LED light source unit 120 to the front. In this case, the reflector (Reflector) type, the bracket 150 is formed on both sides of the plate 151, reflector 152 and the lens holder 153, respectively, the reflector 152 and the lens holder 153 is formed integrally Can be. As described above, since the reflector 152 and the lens holder 153 are integrally formed, the assembling process can be simplified as compared with the case where the reflector 152 and the lens holder 153 are separately configured.

The reflector 152 is formed in a hemispherical shape, the inside thereof may be made of a reflective surface. The reflector 152 is positioned to surround the light source 122, and the exposure hole exposes the light source 122 to the plate 151 inside the reflector 152 so that the light emitted from the light source 122 is reflected by the reflecting surface. 154 may be formed. Therefore, when power is applied to the light source 122 to emit light, the emitted light is reflected by the reflecting surface of the reflector 152 through the exposure hole 154 to proceed.

The bracket 150 may be provided with a lens holder 153 that can fix the lens on the opposite side of the reflector 152. In the embodiment of the present invention, the lens holder 153 has a circular shape. Shall be. A coupling protrusion 153a through which the lens may be coupled may be formed around the lens holder 153, and the coupling protrusion 153a may be inserted into and coupled to the coupling hole formed along the lens circumference.

The plate 151 is provided with a coupling hole 151a that is inserted into and coupled to the coupling protrusion 112 formed on the bracket 110 so that the bracket 150 may be coupled to a lamp mounting frame (not shown) of the vehicle. Accordingly, the vehicle lamp 100 that has been assembled may be mounted on the vehicle.

As such, the vehicle lamp 100 of the present invention does not use a coupling means such as a bolt for coupling each component, the process can be simplified during assembly, and the thermal conductivity is low due to the use of a separate coupling means The temperature can be lowered efficiently by preventing it.

Figure 6a schematically shows the mounting of the heat dissipation in the vehicle lamp according to an embodiment of the present invention. Referring to FIG. 6A, the heat dissipation unit 140 including one or more heat dissipation thin plates 145 may be inserted into the rear end of the heat spread plate 130 in a vertical state.

Each of the heat dissipation thin plates 145 may include fitting holes to be fitted to the heat spreading plate 130, and may be sequentially inserted one by one, or a plurality of thin heat thin plates 145 may be stacked and inserted into the heat spreading plate 130 at a time.

Each of the heat dissipation thin plates 145 may be disposed at a predetermined distance from other adjacent heat dissipation thin plates. Each of the heat dissipation thin plates 145 may include protrusions 141 formed on the thin plates so as to be disposed at predetermined intervals. When the heat dissipation thin plates 145 are fitted to the heat spreader plate 130 by the protrusions 141, the heat dissipation thin plates 145 may be spaced apart by the height of the protrusions. Accordingly, each heat dissipation thin plate 145 may form a heat dissipation pattern having a fin structure capable of dissipating heat to the outside. The protrusion 141 may have a strip shape corresponding to the width of each heat dissipation thin plate 145.

Figure 6b schematically shows the mounting of the heat dissipation in the vehicle lamp according to another embodiment of the present invention. Referring to FIG. 6B, the heat dissipation unit 140 including one or more heat dissipation thin plates 145 may be inserted into the rear end of the heat spreader plate 130 in a vertical state.

Each of the heat dissipation thin plates 145 may include first and second protrusions 142 and 143, respectively, on the upper and lower portions of the heat spreading plate 130 to maintain a predetermined distance between adjacent heat dissipating thin plates 145. Can be. Accordingly, even when the thickness of each of the heat dissipation thin plates 145 is relatively thin, the vertical state can be easily maintained by the first and second protrusions 142 and 143 positioned at the upper and lower portions thereof, The interval between the 145 may be kept constant by the height of the protrusions 142 and 143. The protrusions 142 and 143 may have a stripe shape corresponding to the width of each of the heat dissipation thin plates 145.

Figure 6c schematically shows the mounting of the heat dissipation in the vehicle lamp according to another embodiment of the present invention. Referring to FIG. 6C, the heat dissipation unit 140 including one or more heat dissipation thin plates 145 may be inserted into the rear end of the heat spreader plate 130 in a vertical state.

Each of the heat dissipation thin plates 145 has a first protrusion 144 positioned adjacent to a fitting hole into which the heat spreader plate 130 is fitted, and a second protrusion positioned at an adjacent upper end of the height of the first protrusion 144 at the rear surface thereof. It may include a protrusion 148.

Accordingly, when the heat dissipation thin plates 145 are sequentially inserted into and coupled to the heat spread plate 130, the second protrusions of the second heat dissipation thin plates 147 are connected to the first protrusions 144 of the first heat dissipation thin plates 146. 148 may overlap to form a structure in which the first heat dissipation thin plate 146 and the second heat dissipation thin plate 147 are coupled to each other. Here, the first heat dissipation thin plate 146 and the second heat dissipation thin plate 147 are positioned adjacent to each other, and are inserted into the heat spread plate 130 in order. On the other hand, the first protrusion 144 and the second protrusion 148 may be formed in a strip shape as much as the width of each of the heat dissipation thin plates (146, 147).

As described above, one or more of the heat dissipation thin plates 145 fitted to the heat spread plate 130 are strongly maintained in a vertical state by the coupling structure of the first protrusion 144 and the second protrusion 148. To maintain a proper spacing between the heat dissipation thin plate 145.

Figure 7a schematically shows the mounting of the shear heat dissipation thin plate in the vehicle lamp according to another embodiment of the present invention, Figure 7b schematically shows the application of the shear heat dissipation thin plate of Figure 7a to the vehicle lamp.

Referring to FIGS. 7A and 7B, a shear heat dissipation unit 160 including one or more shear heat dissipation thin plates 165 is vertically fitted to the front end of the heat spread plate 130.

An LED light source unit 120 including an LED light source 122 and a printed circuit board 121 is mounted at an upper end of the front end of the heat spread plate 130, and at least one shear heat dissipation is provided at the lower end of the front end of the heat spread plate 130. The thin plate 165 is fitted in the vertical state.

On the other hand, the rear end portion of the heat spread plate 130 is fitted with one or more rear end heat dissipation thin plate 145 which is fitted in a vertical state to the heat spread plate 130.

The front end side of the heat spread plate 130 may include a slot 135 for guiding the front heat dissipation thin plate 165 to be slidingly inserted.

The front heat dissipation thin plate 165 may include an insertion groove 167 to be inserted into the slot 135 to slide. In addition, the shear heat dissipation thin plate 165 may include an insertion protrusion 168 that is integrally formed with the insertion groove 167 and constitutes the shear heat dissipation thin plate 165 together with the second thin plate.

As shown in FIG. 7B, one or more shear heat dissipation thin plates 165 are inserted at the front end of the heat spreader plate 130 along the slot 135 of the front end side of the heat spreader plate 130 and positioned at the lower end of the front end. To configure the shear heat dissipation unit 160. In addition, the rear end heat dissipation thin plate 175 composed of one or more may be inserted into the rear end of the heat spread plate 130 to constitute the rear end heat dissipation unit 170.

The shear heat dissipation thin plate 165 may include a second protrusion 161 to maintain a gap with the shear heat dissipation thin plate which is adjacent to each other. The rear end heat dissipation thin plate 175 may include a first protrusion 171 to maintain a distance from the rear end heat dissipation thin plate located adjacently.

As described above, in another embodiment of the present invention, by disposing the heat dissipation thin plates 165 and 175 at the front end and the rear end of the heat spread plate 130, heat may be efficiently discharged to the outside in a narrow space.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

110: bracket 120: LED light source
130: heat spread plate 140: heat dissipation unit
141, 142, 143, 144, 148: projection
145: heat dissipation sheet
150: lens assembly
160: shear heat dissipation unit 165: shear heat dissipation thin plate
170: rear end heat dissipation unit 175: rear end heat dissipation plate

Claims (13)

A heat spread plate on which the LED light source is disposed;
At least one heat dissipation thin plate coupled to the heat spread plate; And
And a bracket supporting the heat spreader plate. According to claim 1, wherein the heat dissipation thin plate
A vehicle lamp fitted through the heat spreader plate or slidingly fitted to a side of the heat spreader plate. According to claim 1, wherein the heat dissipation thin plate
Lamination; And
And a fitting hole formed in the thin plate to be fitted to the heat spread plate. The method of claim 3, wherein
The heat dissipation thin plate has a projection for maintaining a gap between adjacent heat dissipation thin plate, the vehicle lamp. The method of claim 4, wherein the protrusion is
A first protrusion formed at an upper end of the front surface of the thin plate based on the fitting hole; And
Vehicle lamp comprising a second projection formed on the front lower end of the thin plate. The method of claim 4, wherein the protrusion is
A first protrusion formed on a front surface of the thin plate and forming a strip shape at an upper end of the fitting hole; And
And a second protrusion formed on a rear surface of the thin plate, the second protrusion having a band shape at an adjacent upper end of the height of the first protrusion. The method of claim 6,
The heat dissipation thin plate includes a first heat dissipation thin plate and a second heat dissipation thin plate which are inserted at least in order,
The second protrusion of the first heat dissipation thin plate and the first protrusion of the second heat dissipation thin plate are disposed to overlap, the vehicle lamp. The method of claim 1,
The bracket is a vehicle lamp for irradiating forward the light generated by the LED light source unit by sliding the insertion of the heat spread plate. An LED light source unit and a heat spread positioned below the LED light source unit;
At least one rear heat dissipation thin plate coupled to a rear end of the heat spread plate; And
And at least one shear heat dissipation thin plate fitted to the heat spread plate at a lower end of the front end of the heat spread plate. The method of claim 9,
The rear heat dissipation thin plate includes a fitting hole formed in the first thin plate to be fitted to the first thin plate and the heat spread plate,
The rear end thin plate is a vehicle lamp, wherein a first projection is formed on the first thin plate to maintain a distance from another adjacent rear end heat dissipation thin plate. The method of claim 9,
The shear heat dissipating thin plate includes an insertion groove or an insertion protrusion to slide the second thin plate to the heat spread plate on the second thin plate and the upper end of the second thin plate. 12. The method of claim 11,
The heat spread plate is a vehicle lamp, the side of the front end is formed with a slot for guiding the shear heat dissipation plate is fitted. 12. The method of claim 11,
The second thin plate is a vehicle lamp, wherein a second projection is formed on the second thin plate to maintain a distance from the adjacent shear heat dissipation thin plate.

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