JP2001024216A - Fixation structure for light emitting diode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fixation structure in which an elastic claw is pressed so as to release its coupling operation and in which a metal plate is replaced easily, by forming a coupling part having a structure in which the elastic claw is coupled to a housing from the inside and in which the elastic claw can be pressed from the outside to a direction in which its coupling operation is released. SOLUTION: Lead legs 12 of a light emitting diode 4 are inserted respectively into continuity holes 11 in a metal plate 3 so as to be coupled. Then, cut grooves 10 which are formed in leg parts 8 of the metal plate 3 are set on a cord 2, the metal plate 3 around the light emitting diode 4 is pressed, and the cut grooves 10 are force-fitted to the cord 2. In this state, elastic claws 9 at both ends of the metal plate 3 are coupled to lower edges of transverse bars 7, and it is possible to prevent the metal plate 3 from being removed from a housing 1 due to the encroaching force of the cut grooves 10 the cord 2. Then, when the metal plate 3 is a defective, a thin tool or the like is inserted from an open part on the lower side of the transverse bars 7, and the elastic claws 9 are pressed. Then, the metal plate 3 can be replaced easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode fixing structure, and more particularly to a light emitting diode fixing structure suitable for a vehicle lamp device.

[0002]

2. Description of the Related Art Generally, as a light emitting diode used for a lamp for a vehicle, a lead leg formed on the bottom surface of the light emitting diode is engaged with a conduction hole of a metal plate. The legs are bent from both ends on the metal plate,
A kerf formed at the tip of the leg is pressed against the cord held in the housing, and the kerf cuts the outer skin of the cord so as to be in conduction with the core wire of the cord (as a similar technique). And JP-A-10-208515).

[0003] The metal plate used for fixing the light emitting diode is formed with a check claw that is obliquely upward facing each of the legs on both sides. The check pawl is pushed between a pair of walls formed opposite to each other on the housing, and the upper end of the check pawl is engaged with a stopper protruding from the inner surface of the wall to prevent the metal plate from coming off. ing.

[0004]

However, in such a conventional technique, a metal plate serving as a pedestal of a light emitting diode is pushed between a pair of walls in a housing, and the upper end of the check nail is attached to the wall. Since it is structured to be engaged with the stopper on the inner surface, once it is fixed to the housing, it becomes difficult to remove the metal plate. Therefore, it has been difficult to replace the metal plate when the fixed metal plate is defective or when the metal plate is deformed when being fixed.

The present invention has been made by paying attention to such a conventional technique, and provides a light emitting diode fixing structure in which a metal plate can be easily replaced.

[0006]

According to the first aspect of the present invention,
The legs are bent from both ends of the metal plate, the lead legs of the light emitting diode are engaged with the conduction holes provided in the metal plate, and the cut grooves formed at the tips of the legs of the metal plate are formed on the housing. A fixing structure for a light emitting diode in which a cut groove cuts an outer skin of the cord to fix the cord by pressing the cord against the cord to form a conductive state with the core wire. An engaging portion having a structure in which the elastic claw is engaged from the inside and the elastic claw can be pressed from the outside in the disengagement direction.

According to the first aspect of the invention, the engagement can be released by pressing the elastic claws formed on the legs of the metal plate from outside, so that the metal plate can be easily replaced.

[0008] The invention according to claim 2 is a horizontal bar in which the engaging portion is provided at a predetermined height position.

According to the second aspect of the present invention, since the engaging portion of the housing is a horizontal bar provided at a predetermined height, the elastic claw is pressed from the lower open portion of the horizontal bar to engage. Can be canceled.

According to a third aspect of the present invention, the conductive hole and the cut groove in the metal plate are formed at the same position in the width direction of the metal plate.

According to the third aspect of the present invention, since the conductive hole and the cut groove in the metal plate are formed at the same position in the width direction, the metal plate does not tilt even if an upward reaction force is generated from the cord. No excessive force is applied to the legs of the light emitting diode.

According to the fourth aspect of the present invention, the cord is held in a recess formed in the housing, and a caulking portion is formed near an upper end of the recess to close an entrance of the recess.

According to the fourth aspect of the present invention, since the cord is confined in the recess of the housing by the swaged portion, the position of the cord is stabilized and the press-fitting operation of the cut groove of the metal plate becomes easy. In this case, the lifting of the cord is prevented, and when the cord is more strongly confined, the displacement in the longitudinal direction of the cord is also prevented.

According to a fifth aspect of the present invention, the cord is held in a recess formed in the housing, and a lateral groove is formed at the bottom of the recess to allow the cord to enter.

According to the fifth aspect of the present invention, since the cord enters the lateral groove in the recess formed in the housing,
The same confining effect as the caulking portion described in the preceding paragraph can be obtained, and since the caulking operation is not required, it is advantageous in terms of workability.

According to a sixth aspect of the present invention, four lead legs are formed on the light emitting diode, and the light emitting diode is fixed to the cord held in the housing by two metal plates arranged close to each other.

According to the sixth aspect of the present invention, since the light emitting diode has four lead legs, it is difficult for the light emitting diode to fall down after being fixed. Also, since one light emitting diode is fixed by two metal plates, the size of one metal plate can be reduced, and the manufacture of the metal plate becomes easy.

[0018]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In this embodiment, a case of a stop lamp of an automobile will be described as an example.

FIG. 1 to FIG. 4 are views showing a first embodiment of the present invention. Reference numeral 1 in the drawing indicates a housing provided inside the lens of the stop lamp. Since the stop lamp itself has a three-dimensional surface shape corresponding to the surface shape of the vehicle body, a plurality of housings 1 are actually connected in a three-dimensional surface shape.

In each housing 1, two cords 2 are arranged in parallel, and a light emitting diode 4 is fixed to the cord 2 via a metal plate 3.
The cord 2 has a structure in which a core wire 2a is covered with an outer skin 2b (see FIG. 4).

In the housing 1, one center wall 5 and two side walls 6 are provided at predetermined intervals in the width direction (X direction in FIG. 1). The cord 2 is routed between each of the center walls 5 and the side walls 6. At both ends of each of the center walls 5 and the side walls 6 in the longitudinal direction (Y direction in FIG. 1), a horizontal bar 7 as an “engaging portion” is provided above the center wall 5 and the side wall 6 and extends in a direction facing each other. Are formed. An opening is formed below the horizontal bar 7. In addition, various ribs for increasing rigidity are formed on the housing 1 in addition to the center wall 5 and the side walls 6.

The metal plates 3 are used in pairs. Downward legs 8 are formed on both sides in the longitudinal direction of the metal plate 3. From the lower end of the leg 8, an upward elastic claw 9 is formed in a folded state. The elastic nail 9
It has the shape of a "ku" bent outward. Leg 8
At the lower end, is formed a cutting groove 10 whose lower part is opened obliquely. The center of the elastic claw 9 is wider than the kerf 10. Two conduction holes 11 are formed in the surface of the metal plate 3. The conduction hole 11 has an elongated shape punched out while leaving a downwardly raised piece.
The conduction hole 11 and the cut groove 10 in the metal plate 3 are both formed at the center position in the width direction of the metal plate 3.

At four corners of the light emitting diode 4, four lead legs 12 are formed. The lead leg 12 is made of good heat transfer copper. Since the light emitting diodes 4 having the four lead legs 12 are fixed by the pair of metal plates 3, the size of each metal plate 3 can be reduced, and the manufacture of the metal plate 3 is easy.

Next, a procedure for fixing the light emitting diode 4 will be described. The lead legs 12 of the light emitting diode 4 are inserted into and engaged with the conduction holes 11 of the metal plate 3 respectively. Then, the kerf 10 formed in the leg 8 of the metal plate 3
Is set on each cord 2, and the metal plate 3 around the light emitting diode 4 is pressed to press the cut groove 10 into the cord 2.

When the kerf 10 is pressed into the cord 2, the kerf 10 cuts the outer skin 2b of the cord 2 and bites into the core wire 2a (see FIG. 4). Due to the biting force between the notch 10 and the cord 2, the light emitting diode 4
To a fixed state. In addition, metal plate 3
, The conduction state between the light emitting diode 4 and the cord 2 is also obtained.

When the metal plate 3 is pressed into the cord 2, the elastic claws 9 on both sides of the metal plate 3 engage with the lower edge of the horizontal bar 7.
The metal plate 3 is prevented from coming off the housing 1 in combination with the biting force of the metal plate 3.

In the state where the light emitting diode 4 is fixed in this way, since the four lead legs 12 of the light emitting diode 4 are provided, the light emitting diode 4 is hard to fall down after fixing, and the cooling effect is high. In addition, since the conduction holes 11 and the cut grooves 10 in the metal plate 3 are both formed at the center in the width direction of the metal plate 3, even if an upward reaction force is generated from the cord 2 after fixing, the metal plate 3 does not tilt, No excessive force is applied to the leg 8 of the housing 1.

If the metal plate 3 is defective or the metal plate 3 is deformed at the time of fixing, a thin tool or the like is inserted from the lower opening of the horizontal bar 7 to insert the elastic claws 9. By pressing, the engagement state of the elastic claws 9 can be easily released, and the metal plate 3 can be replaced.

FIGS. 5 to 7 are views showing a second embodiment of the present invention. In the second embodiment, the metal plate 1
3 is wider than in the first embodiment, a conduction hole 11 is formed inside the surface thereof, and a hole 1 for a jumper wire is formed outside the conduction hole 11.
4 are formed. On the leg 15, an elastic claw 16 cut and raised outward is formed at a position corresponding to the conduction hole 11, and a cut groove 10 is formed at a position corresponding to the hole 15.

In the housing 17, recesses 18 for holding the cords 2 are formed on both sides in the width direction, and between the recesses 18, a horizontal bar 19 having a predetermined height is formed. And
At the upper end of the concave portion 18 corresponding to both ends of the horizontal bar 19, a caulking portion 20 having a predetermined height and projecting obliquely is integrally formed.

Before attaching the metal plate 13, the cord 2 is first put into the concave portion 18, and then the caulked portion 20 is moved to the concave portion 1 by hot caulking (or cold caulking is also possible).
8 to close the entrance of the recess 18. This allows
The cord 2 is locked in the recess 18. When the caulked portion is strongly caulked, the caulked portion 20 is pressed against the cord 2 and not only prevents the cord 2 from rising upward, but also prevents the cord 2 from shifting in the longitudinal direction. Then, the metal plate 13 and the light emitting diode 4 are attached in the same manner as in the first embodiment. In the attached state, the upper ends of the elastic claws 16 formed on the legs 15 of the metal plate 13
The engagement with the lower end of the horizontal bar 19 prevents the metal plate 13 from coming off. The elastic claw 16 can also be easily disengaged by pushing it from the outside.

As described above, according to the second embodiment, since the cord 2 is strongly confined in the concave portion 18 by the caulking portion 20, the position of the cord 2 is stabilized, and The work of press-fitting the kerf 10 becomes easy. Further, after the fixing, the lifting of the cord 2 is prevented, so that the metal plate 13 is not inclined. In addition, since the displacement of the cord 2 in the longitudinal direction is also prevented, even if a force is applied to the cord 2 in the longitudinal direction, the press-fit portion can be protected.

The caulking portion 20 may be formed to be higher and diagonal only on one side of the entrance of the concave portion 18 as in the above-described second embodiment, but as shown in a modified example shown in FIG. In addition, a low and oblique caulking portion 21 may be formed on both sides of the entrance of the recess 18, and a non-oblique caulking portion 22 may be formed on one side of the entrance of the recess 18 as shown in FIG. 9.

FIGS. 10 and 11 are views showing a third embodiment of the present invention. The third embodiment is almost the same as the second embodiment, but instead of forming a caulked portion, lateral grooves 25 are formed in the bottom of the concave portion 24 in the housing 23 so as to face each other. This horizontal groove 2
5 is slightly smaller than the diameter of the cord 2, the lateral groove 2
By fitting the cord 2 in the cord 5, not only the cord 2 is prevented from being lifted upward, but also the cord 2 is prevented from being displaced in the longitudinal direction. According to the third embodiment, in addition to the effect obtained in the second embodiment, the necessity of the caulking operation is eliminated, which is advantageous in terms of workability.

In each of the above embodiments, the horizontal bar 7 provided at a predetermined height has a structure which can be engaged with the elastic claws 9 and 16 and can be released by pushing the engaged state from the outside. , 19, but is not limited to this. For example, an opening may be formed in the wall, and the elastic claws 9 and 16 may be engaged with the upper edge of the opening. The engagement can be easily released by inserting a tool or the like from the opening and pressing the elastic claws 9 and 16.

[0036]

According to the first aspect of the present invention, the engagement can be released by pressing the elastic claws formed on the legs of the metal plate from the outside, so that the metal plate can be easily replaced.

According to the second aspect of the present invention, since the engaging portion of the housing is a horizontal bar provided at a predetermined height, the elastic claw is pressed from the lower open portion of the horizontal bar to engage. Can be canceled.

According to the third aspect of the present invention, since the conductive holes and the cut grooves in the metal plate are formed at the same position in the width direction, the metal plate does not tilt even if an upward reaction force is generated from the cord. No excessive force is applied to the legs of the light emitting diode.

According to the fourth aspect of the present invention, the cord is confined in the recess of the housing by the caulking portion, so that the position of the cord is stabilized, so that the press-fitting work of the cut groove of the metal plate can be easily performed, and after fixing. In this case, the lifting of the cord is prevented, and when the cord is more strongly confined, the displacement in the longitudinal direction of the cord is also prevented.

According to the fifth aspect of the present invention, since the cord enters the lateral groove in the recess formed in the housing,
The same confining effect as the caulking portion described in the preceding paragraph can be obtained, and since the caulking operation is not required, it is advantageous in terms of workability.

According to the sixth aspect of the present invention, since the light emitting diode has four lead legs, the light emitting diode does not easily fall down after being fixed. Also, since one light emitting diode is fixed by two metal plates, the size of one metal plate can be reduced, and the manufacture of the metal plate becomes easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a fixing structure of a light emitting diode according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a fixing structure of a light emitting diode.

FIG. 3 is a plan view showing a fixing structure of a light emitting diode.

FIG. 4 is a sectional view showing a state after press-fitting a kerf into a cord.

FIG. 5 is an exploded perspective view showing a light emitting diode fixing structure according to a second embodiment of the present invention.

FIG. 6 is a side view showing a state before fixing the light emitting diode.

FIG. 7 is a side view showing a state after fixing of the light emitting diode.

FIG. 8 is a side view of a housing showing a modified example of the caulking portion.

FIG. 9 is a side view of a housing showing another modified example of the swaging portion.

FIG. 10 is a side view showing a state before fixing a light emitting diode according to a third embodiment of the present invention.

FIG. 11 is a side view showing a state after fixing of the light emitting diode.

[Description of Signs] 1, 17, 23 Housing 2 Cord 2a Core wire 2b Outer skin 3, 13 Metal plate 4 Light emitting diode 7, 19 Side bar (engaging portion) 8, 15 Leg 9, 16 Elastic claw 10 Cut groove 11 Conduction Hole 12 Lead leg 14 Hole 18, 24 Recess 20, 21, 22 Caulked portion 25 Lateral groove X Width direction Y Longitudinal direction

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Koji Tsunoda 80 Itado, Isehara-shi, Kanagawa F-term in Isehara Industrial Co., Ltd. Isehara Factory (reference) 3K013 AA03 BA01 CA02 DA07 DA09 EA10 5F041 AA31 AA38 DB09 DC26 DC33 DC44 DC53 DC57 FF16

Claims (6)

[Claims] 1. A leg formed by bending a leg from both ends of a metal plate, a lead leg of a light emitting diode is engaged with a conduction hole provided in the metal plate, and a notch formed at a tip of the leg of the metal plate. Is pressed against a cord on the housing to fix the light emitting diode so that the cut groove cuts the outer skin of the cord and becomes conductive with the core wire. Wherein the elastic claw is engaged with the housing from the inside, and an engaging portion having a structure capable of pressing the elastic claw from the outside in the disengagement direction is formed. 2. The light-emitting diode fixing structure according to claim 1, wherein the engaging portion is a horizontal bar provided at a predetermined height. 3. The fixing structure for a light emitting diode according to claim 1, wherein the conduction hole and the cutout in the metal plate are formed at the same position in the width direction of the metal plate. Light emitting diode fixing structure. 4. The fixing structure for a light-emitting diode according to claim 1, wherein the cord is held in a recess formed in the housing, and an entrance of the recess is provided near an upper end of the recess. A fixing structure for a light emitting diode, wherein a caulking portion for closing is formed. 5. The fixing structure for a light-emitting diode according to claim 1, wherein the cord is held in a recess formed in the housing, and a lateral groove into which the cord enters is formed at the bottom of the recess. A light-emitting diode fixing structure, which is formed. 6. The fixing structure for a light emitting diode according to claim 1, wherein four lead legs are formed on the light emitting diode, and the two light emitting diodes are arranged in close proximity to each other. A light-emitting diode fixing structure fixed to a cord held in a housing by a plate.