JP2006049726A - Led lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lamp which is made small in size in spite of its large heat generation amount. <P>SOLUTION: The lamp comprises an LED 10 covered with a lens 12, a metallic cooling member 11 having the LED 10 mounted thereto, and a holder 13 having the cooling member 11 mounted to one end 13a and formed with a wedge base 14 whose socket can be mounted to the other end 13b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an LED lamp.

For example, automobiles are equipped with various lamps that emit visible light for safe driving, such as headlamps, tail lamps, turn signal lamps, and stop lamps. For these lamps, high-intensity LED lamps are used. This LED lamp is an LED (light emitting diode) that is a compound semiconductor having a pair of terminals, a holder made of an insulating material on which the LED is mounted, a contact piece that contacts the terminal of the LED, and power to the LED. And a heat radiator comprising two metal heat sinks that are insulated from each other so as to surround the outer surface of the holder (for example, Patent Document 1). ).
JP 2004-186277 A

  However, in such a conventional technique, the capacity of the LED is 200 to 500 mA or more, the heat generation amount is high, and unless a large substrate or a heat radiating plate is used, the lifetime and the light emitting characteristics are deteriorated. become. For this reason, LED lamps are limited in size and can be accommodated, and there is a problem of lack of versatility.

  The present invention has been made paying attention to such problems of the prior art, and provides a small LED lamp despite a large calorific value.

  In order to solve such a prior art, the invention described in claim 1 is an LED covered with a lens, a metal cooling member to which the LED is attached, and the cooling member is attached to one end. In addition, the holder has a wedge base portion that can be attached to the socket at the other end portion.

  A second aspect of the present invention is the LED lamp according to the first aspect, wherein the cooling member has a plurality of fins formed on a circumferential surface formed in a columnar shape, and the LED has a high thermal conductivity. It is characterized by being supported by an adhesive.

  The invention according to claim 3 is the LED lamp according to claim 1 or 2, wherein the cooling member is made of an aluminum material.

  According to the first aspect of the present invention, since the LED is mounted on the metal cooling member, the LED can be directly dissipated to the outside air, and it can be miniaturized despite the large amount of heat generation, and the life of the LED lamp. As a result, the emission characteristics are maintained longer. In addition, since the wedge base portion is formed at the other end of the holder to which the cooling member is attached, the attachment to the socket is easy and the workability is improved, and the holder is securely supported by the socket. It will be. Furthermore, since the LED is covered with a lens, the light diffusion of the emitted LED increases. It is easy to replace the bulb-type lamp and the LED lamp later.

  According to the invention described in claim 2, since the cooling member is formed with a plurality of fins on the peripheral surface formed in a columnar shape, the fins can efficiently dissipate heat to the outside air. Further, since the LED is supported by an adhesive having a high thermal conductivity, the heat generated from the LED is more easily dissipated.

  According to the invention described in claim 3, since the cooling member is made of an aluminum material, the temperature can be remarkably reduced even for an LED having a large calorific value.

  For the purpose of providing a small LED lamp despite its large calorific value, an LED covered with a lens, a metal cooling member to which the LED is mounted, and the cooling member at one end This is realized by comprising a holder formed with a wedge base portion which is attached and can be attached to the socket at the other end portion.

  1 to 9 show an LED lamp according to an embodiment of the present invention. Reference numeral 1 denotes an automobile provided with a headlamp 2. The headlamp 2 includes a housing 7 having a headlamp high 3, a headlamp low 4, a clearance lamp 5, and a front turn signal lamp 6, and the housing 7 The cover 8 includes a cover 8 and a seal member 9 disposed around the lens 8. The clearance lamp 5 has a function of being turned on at the time of twilight or the like and notifying other vehicles or pedestrians of the existence of the own vehicle, and is an “LED lamp” of the present invention.

  The headlamp high 3, headlamp low 4, clearance lamp 5, and front turn signal lamp 6 are electrically connected to control means and switches (not shown) and a battery, but will not be described because they are well known.

  The clearance lamp 5 which is an “LED lamp” has a high thermal conductivity in the LED 10 having the LED chip 10a which is covered with a lens 12 made of transparent resin and sealed with resin, and the base 10b of the LED 10 has high thermal conductivity A cooling member 11 made of an aluminum die cast that is mounted and supported by a silicone-based adhesive 20 excellent in heat dissipation, and the cooling member 11 is mounted on one end 13a and one end 16a of the socket 16 is mounted on the other end 13b. It is comprised from the holder 13 in which the wedge base part 14 which can be mounted | worn to is formed. An O-ring 17 for sealing is disposed on the flange 16 b of the socket 16 to maintain watertightness between the housing 7 and the flange 16 b of the socket 16. Reference numeral 18 denotes a connector that fits into the socket 16 and is also fitted to the other headlamp high 3, headlamp low 4, and front turn signal lamp 6 as shown in FIG. Reference numeral 19 denotes a power cord extending from the connector 18 so that electricity can be supplied from a vehicle battery (not shown).

  Reference numeral 15 denotes a pair of thin metal wires that electrically connect a cathode terminal (not shown) as an electrode of the LED 10 and an anode terminal (not shown) to a copper foil (not shown). . As a result, the cathode terminal and the anode terminal which are the electrodes of the LED 10 are electrically connected to the holder 13 via the wire 15 and the copper foil, respectively, so that the holder 13 functions as an electrode for driving the LED 10. Have

  The cooling member 11 is formed on the peripheral surface of the main body 11a by partially breaking the fin 11b and a fin 11b formed by protruding a plurality of outer sides from the peripheral surface of the main body 11a. Through holes 11c, 11c through which the wire 15 can be inserted, a hollow portion 11d formed in the main body 11a in communication with the through hole 11c, and a first protrusion formed from the upper portion 11aa of the main body 11a. The engaging portions 11e and 11e and the second engaging portions 11f and 11f formed to protrude from the lower portion 11ab of the main body 11a.

  The main body 11a has a cylindrical shape with a diameter of 8 millimeters and a height of 7 millimeters. The fin 11b protrudes outward from the main body 11a, and has an outer diameter of 11.9 millimeters and an inner diameter of about 9 millimeters, and is formed in 15 degrees (24 equal parts). The projecting dimensions of the first locking portions 11e and 11e from the upper portion 11aa of the main body 11a are 3 mm, and the width is 4 mm. The second locking portions 11f and 11f protrude 3.2 millimeters from the lower portion 11ab of the main body 11a, and the hollow portion 11d extends as it is. And the width | variety of the collar part 11fa engaged with the holder 13 is 4 millimeters.

  Accordingly, the LED 10 is mounted on the cooling member 11 in which a plurality of fins 11b are formed on a peripheral surface formed in a columnar shape by aluminum die casting, which is a metal, and the base 10b of the LED 10 has high heat conductivity and excellent heat dissipation. Since it is supported on the cooling member 11 by the silicone-based adhesive 20, heat can be directly radiated to the outside air, and the LED temperature when the current of 250 mA is passed through the LED 10 is about 112 ° C. and the heat generation amount is large. Regardless, the applicant has confirmed that the temperature can be significantly reduced to about 60 ° C. Therefore, it is possible even if it is not a large cooling member, and the cooling member 11 itself can be reduced in size.

  In addition, although the allowable use temperature at which there is no concern about the deterioration of the lifetime and the light emission characteristics is 85 ° C. or less, as described above, since it is about 60 ° C., the lifetime of the clearance lamp 5 which is an “LED lamp” is The longer the light emission characteristics are maintained.

  Further, since the wedge base portion 14 is formed on the other end portion 13b of the holder 13 to which the cooling member 11 is attached, it is only necessary to insert the wedge base portion 14, and the attachment to the socket 16 is easy, and not only the workability is improved. Since the wedge base portion 14 is engaged with the socket 16, the holder 13 is securely supported by the socket 16.

  Further, since the LED 10 is covered with the lens 12, the light diffusion of the emitted LED 10 is increased, and the visibility from other vehicles and pedestrians is remarkably improved.

  Such LED lamps have been described as being applied to automobiles, but are not limited to automobiles, and may be lamps equipped on vehicles such as airplanes, ships, unicycles, motorbikes, etc. You can also use a lamp. In addition, although it has been described that it is equipped with various lamps that emit visible light for safe driving, such as headlamps, tail lamps, turn signal lamps, stop lamps, it is not limited to these, for example, instruments Lamps for lighting under the panel, lamps for illuminating the feet, lamps for displaying the inner handle for opening and closing the door, lamps for lighting in the glove box, lamps for illuminating the ignition key insertion holes, etc. are also within the scope of application.

  Moreover, although it demonstrated as fitting the holder 13 provided with LED10 in the said socket 16, in the state provided with the socket 16 provided with the general wedge base valve, the wedge base valve was removed and the LED 10 was provided by rear mounting. The holder 13 may be fitted. At this time, it is desirable to interpose a resistor at an appropriate position of the power cord 19. Furthermore, although the main body 11a of the cooling member 11 has been described as having a cylindrical shape, the main body 11a is not limited to a cylindrical shape, and may be a substantially cylindrical shape.

The perspective view which shows the motor vehicle provided with the general headlamp. The expansion perspective view of the principal part of FIG. FIG. 3 is an exploded perspective view of FIG. 2. The side view which shows the LED lamp concerning one Example of this invention. Sectional drawing which shows the cross section of FIG. The front view of the cooling member of FIG. The side view concerning the arrow A of FIG. The side view concerning the arrow B of FIG. Sectional drawing along the SC-SC line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Headlamp 5 Clearance lamp which is "LED lamp" 7 Housing 10 LED
DESCRIPTION OF SYMBOLS 11 Cooling member 11a Main body 11b Fin 11d Hollow part 11e 1st latching | locking part 11f 2nd latching | locking part 12 Lens 13 Holder 13a One end part 13b Other end part 14 Wedge base part 16 Socket 20 Adhesive

Claims (3)

  An LED covered with a lens, a metal cooling member on which the LED is mounted, and a wedge base portion on which the cooling member is mounted on one end and mounted on a socket on the other end are formed. An LED lamp comprising a holder. The LED lamp according to claim 1,
The cooling member is formed of a plurality of fins on a peripheral surface formed in a columnar shape, and the LED is supported by an adhesive having a high thermal conductivity. The LED lamp according to claim 1 or 2,
The said cooling member is formed from an aluminum material, The LED lamp characterized by the above-mentioned.

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