JP5854703B2 - Coupler fixing structure for vehicular lamp - Google Patents

Description

  The present invention relates to a structure for fixing a coupler to a heat sink for supplying power to an LED light source of a vehicle lamp such as a headlamp.

  In recent years, a vehicular lamp using an LED (light-emitting diode) having a low power consumption and a long life as a light source is increasing. A vehicle lamp such as a headlamp using such an LED as a light source includes a lens, a lens holder that holds the lens, a reflector that is held by the lens holder, a heat sink to which the lens holder is attached, and the heat sink. Some are configured to include an LED light source mounted thereon (see, for example, Patent Document 1).

JP 2010-186698 A

  By the way, in a vehicular lamp that uses an LED light source as a light source and includes a heat sink for dissipating heat from the LED light source, a coupler for supplying power to the LED light source may be attached to the heat sink via a metal stay. Since the coupler was fixed to the heat sink by screwing, there was a problem that the number of parts and the number of assembling steps increased, resulting in an increase in cost.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a purpose of the present invention is to provide a coupler for a vehicle lamp that can be easily attached to a heat sink with a single touch without causing an increase in the number of parts and assembly steps. It is to provide a fixed structure.

In order to achieve the above object, the invention according to claim 1 is a lens, a lens holder for holding the lens, a reflector held by the lens holder, a heat sink attached to the lens holder, and a heat sink on the heat sink. an LED light source mounted on, a fixed structure to the heat sink of the coupler of the vehicle lamp configured to include a coupler for supplying power to the LED light source, an engaging hole is formed in the heat sink Since the engagement hole and the coupler are engaged, the coupler is fixed to the heat sink, and the coupler includes a first coupler to which a connector connected to a power source is connected, and the first coupler. And a second coupler connected to each end of a plurality of power cords extending from one coupler.

According to a second aspect of the present invention, in the first aspect of the present invention, the first coupler is provided with a clip, and the second coupler is formed with an elastically deformable engaging claw. And
The engagement hole of the heat sink is configured by a first engagement hole formed in a circular hole shape and a second engagement hole formed in a rectangular shape, and the clip is formed in the first engagement hole. By being inserted into the hole from the back side, the first coupler is fixed to the heat sink, and the engaging claw is inserted into the second engaging hole from the back side, so that the second The coupler is fixed to the heat sink .

  According to the present invention, the coupler is engaged with the engagement hole formed in the heat sink and directly fixed to the heat sink. Therefore, conventionally required parts such as metal stays and fasteners such as screws are used. Therefore, the coupler can be easily fixed to the heat sink with a single touch, and the number of parts and the number of assembling steps can be reduced to reduce the cost.

1 is a front view of a vehicular lamp according to the present invention. It is the sectional view on the AA line of FIG. It is a rear view of the vehicle lamp which concerns on this invention. It is a rear view of the heat sink of the vehicle lamp which concerns on this invention. 1 is a perspective view of a coupler of a vehicle lamp according to the present invention. It is a perspective view which shows the fixation point to the heat sink of the coupler in the vehicle lamp which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a front view of a vehicular lamp according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a rear view of the vehicular lamp, and FIG. 4 is a rear view of a heat sink of the vehicular lamp. FIG. 5 is a perspective view of the coupler of the vehicle lamp, and FIG. 6 is a perspective view showing the fixing procedure of the coupler to the heat sink in the vehicle lamp.

  The vehicular lamp 1 according to the present embodiment is a low beam lamp incorporated in a lamp chamber of a headlamp provided on the left and right of the front portion of the vehicle, and the configuration thereof is the same on the left and right. Only the lamp 1 is shown and described.

  A vehicle lamp 1 shown in FIGS. 1 and 2 includes a pair of left and right lenses (projection lenses) 2, a pair of left and right lens holders 3 that respectively hold these lenses 2, and a pair of left and right sides that are held by each lens holder 3. The reflector 4 includes a heat sink 5 to which each lens holder 3 is attached, and a pair of left and right LED light sources 6 fixed on the heat sink 5.

  The lens 2 is an aspherical convex lens and is made of a transparent resin such as an acrylic resin, and each lens 2 is fixed to the lens holder 3 integrally formed with a resin by a locking structure. .

  Each of the reflectors 4 is integrally formed of an opaque resin that does not transmit light, and has a dome shape in which the front and lower sides are opened, and the inner surface thereof is subjected to a reflection process such as aluminum vapor deposition to form a reflection surface. ing.

  The heat sink 5 is integrally formed by aluminum die casting or the like having high thermal conductivity, and a pair of left and right lens holders 3 are attached to the front side of the heat sink 5 with screws 7 as shown in FIG. As shown in FIGS. 3 and 4, the heat sink 5 is integrally formed with a plurality of radiation fins 5 a.

  Thus, as shown in FIG. 4, a flat installation surface 5A is formed at the center of the rear surface of the heat sink 5 in the width direction, and a circular engagement hole 5b is formed at the center of the installation surface 5A. Has been. In addition, rectangular engagement holes 5c that are long in the horizontal direction are formed in the upper left and right of the installation surface 5A on the back surface of the heat sink 5 (where the LED light source 6 is disposed).

  As shown in FIG. 2, each of the left and right LED light sources 6 is configured by mounting an LED chip 6b on a rectangular plate-like LED substrate 6a made of ceramic or the like having high thermal conductivity and insulation. The substrate 6 a is fixed to the heat sink 5 by a metal clip 8.

  By the way, the left and right LED light sources 6 are supplied with power from a vehicle battery (not shown) as a power source, but the heat sink 5 is engaged with one first coupler 9 and two second couplers 10 for power supply. It is easily fixed with one touch depending on the structure. Here, as shown in FIG. 5, a clip 9 a is integrally projected on the end face of the rectangular block-shaped first coupler 9, and two power cords 11 on the left and right sides are provided from the first coupler 9. It extends. The second couplers 10 in the form of flat rectangular blocks are respectively connected to the end portions of the left and right power cords 11, and elastically deformable engagements are provided on the left and right sides of each second coupler 10. The claws 10a are integrally formed.

  Thus, as shown in FIG. 6, the first coupler 9 is configured such that the clip 9 a projecting from the first coupler 9 is inserted into the engagement hole 5 b of the heat sink 5 from the back side and engaged, thereby engaging the heat sink 5. As shown in FIG. 3, it is easily fixed to the installation surface 5A by one touch.

  If the two second couplers 10 on the left and right are respectively inserted into the left and right engaging holes 5c formed on the heat sink 5 from the back side, the locking claws 10a formed on both the left and right sides of the second coupler 10 are inserted into the engaging holes 5c. Since they are locked, these second couplers 10 are simply fixed to the heat sink 5 with one touch as shown in FIG. As shown in FIG. 2, when the second coupler 10 is inserted into the engagement hole 5c of the heat sink 5 and fixed, the terminal 10b on the second coupler 10 side is a contact (not shown) of the LED board 6a. Is electrically connected.

  When the first coupler 9 and the second coupler 10 are fixed to the back surface of the heat sink 5 as described above, a connector (not shown) connected to the in-vehicle battery is inserted into and connected to the first coupler 9. The LED light source 6 is electrically connected to the in-vehicle battery.

  Thus, when the driver turns on a lighting switch (not shown) during vehicle travel at night, current is supplied from the in-vehicle battery to the left and right LED light sources 6, and the LED chip 6b of each LED light source 6 is turned on. When activated, it emits light. Then, the light from each LED light source 6 is reflected by the reflecting surface of each reflector 4 and the reflecting surface of the lens holder 3 and distributed for the low beam, and then travels forward of the vehicle and passes through the left and right lenses 2. As a result, the light is condensed and irradiated forward through an outer lens (not shown) that covers the front opening of the housing (not shown). At this time, the heat generated by the LED chip 6b of each LED light source 6 is conducted from the LED substrate 6a to the heat sink 5 and efficiently radiated from the heat radiation fins 5a of the heat sink 5 to the outside, so that the temperature of the LED chip 6b increases. Thus, the LED chip 6b is secured with high luminous efficiency and long life.

  As described above, in the vehicular lamp 1 according to the present invention, the first and second couplers 9 and 10 are engaged with the engagement holes 5b and 5c formed in the heat sink 5 and directly fixed to the heat sink 5, respectively. As a result, the first and second couplers 9 and 10 can be easily fixed to the heat sink 5 with one touch without using a conventionally required component such as a metal stay or a fastener such as a screw. The effect of reducing costs by reducing the number of points and assembly man-hours is obtained.

  Although the present invention has been described with respect to the embodiment in which the present invention is applied to the low beam lamp of the headlamp, the present invention is applicable to any other vehicular lamp other than the headlamp, in addition to the high beam lamp of the headlamp. Of course, the same applies.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Lens 3 Lens holder 4 Reflector 5 Heat sink 5A Heat sink installation surface 5a Heat sink radiating fin 5b, 5c Heat sink engagement hole 6 LED light source 6a LED substrate 6b LED chip 7 Screw 8 Clip 9 First coupler 9a Clip of first coupler 10 Second coupler 10a Locking claw of second coupler 10b Terminal of second coupler 11 Power cord

Claims (2)

A lens, a lens holder holding the lens, a reflector held by the lens holder, a heat sink attached to the lens holder, an LED light source mounted on the heat sink, and for supplying power to the LED light source The vehicle lamp comprising the coupler of the above, the structure for fixing the coupler to the heat sink,
It said heat sink are engaging hole is formed, and that the engaging hole and the coupler is engaged, the coupler is fixed to the heat sink,
The coupler includes a first coupler to which a connector connected to a power source is connected, and a second coupler connected to each end of a plurality of power cords extending from the first coupler. A coupler fixing structure for a vehicular lamp.
The first coupler has a clip protruding from the first coupler,
The second coupler has an engaging claw that is elastically deformable,
The engagement hole of the heat sink is configured by a first engagement hole formed in a circular hole shape and a second engagement hole formed in a rectangular shape,
By inserting the clip into the first engagement hole from the back side, the first coupler is fixed to the heat sink,
2. The vehicle lamp coupler according to claim 1 , wherein the second coupler is fixed to the heat sink by inserting the engagement claw into the second engagement hole from the back side. Fixed structure.

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