JP2821461B2 - Light emitting diode - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode. 2. Description of the Related Art FIG. 2 is a view showing a conventional light emitting diode. First, the structure of the light emitting diode will be described. In 1, a hole for inserting a lead is formed substantially perpendicularly to the surface of the substrate 1. The holes are formed in pairs, and the holes are connected to a power source (not shown) via the patterned conductive film. [0003] A pair of leads 3 of the light emitting diode 2 are inserted into the pair of holes, and the leads 3 are connected to the light emitting section 4. The lead 3 includes a support portion 5 extending in parallel from the light emitting portion 4, an insertion portion 6 extending in parallel with the support portion 5 at a wider interval than the support portion 5, and both ends of the support portion 5 and the insertion portion 6.
And a connecting portion 7 which is connected to each other and extends in a substantially C-shape. In order to mount the light emitting diode 2 having such a structure on the substrate 1, first, a pair of leads 3 are aligned with holes of the substrate 1, and the light emitting portion 4 is pressed in the direction of arrow F. The light emitting diode 2 is fixed to the substrate 1. [0005] However, in the conventional light emitting diode 2, since the connecting portion 7 has a substantially C-shape, when the light emitting diode 2 is attached to the substrate 1, the force in the direction of arrow F is required. When a force in a direction different from the arrow F, for example, a force in the direction of the arrow A is applied or one of the leads is pulled for cutting, one of the leads slides in the hole, and the light emitting unit 2 is moved to the position shown in FIG. There was the problem of tilting as shown. In addition, there is also a problem in that a lead force is generated due to a striking force generated when inserting using an automatic insertion machine, so that the mounting dimension H up to the apex of the light emitting portion 14 varies. Conventionally, as described in, for example, Japanese Utility Model Laid-Open Publication No. 60-63962, a bullet-shaped or cylindrical light-emitting portion, a pair of support portions extending parallel to each other from the light-emitting portion, The pair of insertion portions and the support portion extending parallel to each other at a wider interval than the portion are bent at a right angle from the pair of insertion portions, and are also bent at a right angle to the insertion portion to connect the support portion and the insertion portion. There has been proposed a light-emitting diode lamp including a pair of leads including a pair of connecting portions and capable of defining a mounting height. However, in the case of a lead shape such as this type of light emitting diode lamp, an automatic mounting machine is used because the support portion and the connection portion of the lead are connected by being bent at a right angle. When the lead is inserted into the substrate and the light emitting diode lamp is mounted, the light emitting portion receives substantially all of the force of the vertical component of the impact force generated when the connecting portion collides with the mounting substrate. There is a concern that cracks and the like may occur in the mold, and the light emitting function may be reduced or lost. Further, when stress is applied to the light emitting portion in an oblique direction, the support portion of the lead and the connecting portion are bent at a right angle and connected to each other, so that the lead portion is easily deformed at the bent portion. Further, since the pair of support portions and the pair of insertion portions are both configured to extend in parallel, if the interval at which the pair of support portions is attached to the light-emitting portion is not changed, the insertion portion may not be inserted. There is a disadvantage that the mounting interval is increased and a space is taken up, and if the mounting interval of the insertion portion is also kept as it is, the connecting portion is shortened, which has the same defect as that of FIG. Furthermore, if the insertion portion and the connection portion are set as they are, the mounting interval of the support portion in the light emitting portion becomes narrow, and the strength in the support portion becomes weak against the force in the direction of arrow A as shown in FIG. There was a disadvantage that it would. For example, in Japanese Utility Model Laid-Open Publication No. 61-102062, the connecting portion is made longer by setting the mounting position of the support portion at the light emitting portion at right angles to the mounting position of the insertion portion at the substrate.
With respect to the force in the direction of arrow A (the force in the direction of the mounting position of the insertion portion), the strength becomes extremely weak. The present invention has the following configuration in order to solve the above-mentioned problems. That is, a light-emitting diode of the present invention is a light-emitting diode having a light-emitting portion and a pair of leads extending from the bottom surface of the light-emitting portion, wherein the pair of leads extend from the light-emitting portion while approaching each other. It is characterized by comprising a support portion, a pair of insertion portions extending substantially parallel to each other and at an interval wider than the interval between the pair of support portions, and a pair of connection portions connecting the support portion and the insertion portion. It is assumed that. The present invention also includes a light emitting diode having the above structure, wherein the light emitting section has an extension on the bottom side of the light emitting section. Furthermore, the present invention also encompasses a light emitting diode having such a configuration, wherein the interval between the pair of insertion portions is substantially equal to or smaller than the width of the light emitting portion. FIG. 1 is a front view showing an embodiment of the present invention. In FIG. 1, reference numeral 12 denotes a light emitting diode, reference numeral 14 denotes a light emitting portion of the light emitting diode 12, and FIG. 13
Denotes a pair of leads which are inserted and attached to holes formed in the substrate 11, respectively. The light emitting diode 12 includes a light emitting portion 14 and a pair of leads 13 extending downward from the bottom surface of the light emitting portion 14. An extended portion 14a is provided on the bottom surface side of the light emitting portion 14. The pair of leads 13 includes a pair of support portions 15 extending downward from the bottom surface of the light emitting portion 14 while approaching each other, and a pair of insertion portions inserted into holes of the substrate 11 substantially parallel to each other. And a pair of connecting portions 17 connecting the support portion 15 and the insertion portion 16 by connecting both ends to the support portion 15 and the insertion portion 16, respectively. The connection portion 17 extends substantially perpendicularly to the insertion portion 16. The pair of insertion portions extend downward at an interval wider than the interval between the pair of support portions. A pair of leads 13 of the light emitting diode 12
For example, a pair of leads is formed so as to extend downward substantially in parallel from the bottom surface of the light emitting section 14, and then is bent into a configuration including the support section 15, the connecting section 17, and the insertion section 16. At this time, since the pair of supporting portions 17 are bent so as to approach each other downward from the bottom surface of the light emitting portion 14 of the light emitting diode 12, the pair of leads 13 extend during this bending process. A pair of leads 13 is connected to the light emitting portion 14 at the bottom of the light emitting portion 14.
If the light emitting portion 14 is made of, for example, a commonly used resin sealing, a crack may occur in the resin sealing of the light emitting portion 14 when a stress is generated in an outward direction from a portion protruding from the light emitting portion 14. However, by providing the extended portion 14a on the bottom surface side of the light emitting portion 14 as described above, it is possible to effectively prevent problems such as generation of cracks in the resin sealing of the light emitting portion 14. Further, by extending the support portions 15 of the pair of leads 13 of the light emitting diode 12 while gradually approaching each other as described above, the interval between the pair of insertion portions 17 can be reduced. 17 can be formed so as to be substantially the same as or narrower than the width of the light emitting portion 14 of the light emitting diode 12, so that high integration of the light emitting diode can be achieved.
Further, the size of the light emitting portion of the light emitting diode can be increased. Next, when the light-emitting diode 12 is mounted on the substrate 11, the light-emitting diode 12 is mounted by inserting a pair of leads 13 into holes of the substrate 11 having the same structure as that of the conventional example. Since the connecting portion 17 of the pair of leads 13 is bent substantially perpendicularly to the insertion portion 16, when the connecting portion 17 of the pair of leads 13 is mounted on the board 11, the connecting portion 17 of the pair of leads 13 is And can come into line contact with the surface of the substrate 11. The light emitting diode 12 having such a structure is mounted on the substrate 1.
In terms of the operation of attaching the light emitting device to the light emitting device 1, the insertion portions 16 of the pair of leads 13 of the light emitting diode 12 are respectively aligned with the pair of holes, and then the light emitting portion 14 is pressed downward (arrow F). Then, the insertion portion 16 connects the connecting portion 17 to the substrate 1.
The connecting portion 17 can be used as a stopper until it is inserted into contact with the surface of the first member. Further, since the connecting portion 17 extends substantially horizontally with respect to the surface of the substrate 11, the connecting portion 17 can be brought into contact with the surface of the substrate 11 with almost no gap. Can be mounted at a desired height from the mounting substrate with a constant distance (mounting dimension) L from the substrate surface, and since the pair of support portions 15 extend while approaching each other, Even if a force is applied, the deformation of the lead 13 can be reduced, and the light emitting portion of the light emitting diode 12 can be mounted vertically on the surface of the substrate 11 without tilting, and can be prevented from being tilted by external force after mounting. Further, in the present invention, the pair of leads 13 of the light emitting diode 12 extend downward from the bottom surface of the light emitting portion 14 so as to approach, so that the connecting portion 17 and the support portion 15 are provided.
Θ <90 °, and when the hole interval D is constant, the length of the connecting portion 17 can be made longer than when θ = 90 °. When the lead 13 is inserted into and attached to the substrate 11, the impact force applied to the light emitting diode 12 can be absorbed more. In addition, the connecting portion 1 of the lead 13
7 and the supporting portion 15 are acute, so that the impact force at the time of mounting can be further reduced as compared with the case where the angle θ is a right angle.
Deformation of the pair of leads 13, and further, for example, the light emitting section 14
Has a general structure in which a light emitting element is connected to a lead using wire bonding and is sealed with a resin. This can reduce the occurrence of defects. Further, as described above, the length of the connecting portion 17 of the pair of leads 13 can be lengthened and can be substantially horizontal with the surface of the substrate 11, so that the connecting portion 17 has almost no gap with the surface of the substrate 11. Even if a force in an oblique direction to the surface of the substrate 11 is applied to the light emitting portion, the component of the force in the vertical direction with respect to the center line of the lead is smaller than in the conventional example, and the amount of deformation of the lead is smaller. Has the advantage of becoming As described above, according to the present invention, a pair of leads of a light-emitting diode are connected to a pair of support portions extending from the light-emitting portion while approaching each other and substantially parallel to each other. In addition, the light emitting diode includes a pair of insertion portions extending at an interval wider than the interval between the pair of support portions, and a pair of connection portions connecting the support portion and the insertion portion. The received force can be effectively absorbed, the displacement of the mounting dimensions due to the deformation of the lead, the adverse effect on the light emitting section, and the like can be significantly reduced, and the mounting with higher precision than before can be realized. Further, in the present invention, when the extended portion is provided on the bottom surface side of the light emitting portion, when the support portion of the pair of leads is bent inward so as to gradually approach, the bending portion is formed on the light emitting portion. Failure can be effectively prevented from occurring. Further, as in the present invention, by providing the support portions of the pair of leads of the light emitting diode so as to gradually approach each other, the interval between the insertion portions of the pair of leads can be narrowed, and high integration can be achieved. When the distance between the insertion portions is substantially equal to or smaller than the width of the light emitting portion, the light emitting diode can be attached even in a state of being extremely close to or in contact with the light emitting diode.

[Brief description of the drawings] FIG. 1 is a front view showing an embodiment of the present invention. FIG. 2 is a front view of a conventional example. FIG. 3 is an explanatory diagram for explaining a problem of a conventional example. [Explanation of symbols] 11 Substrate 12. Light emitting diode 13 Lead 14 Light emitting unit 14a Extension 15 Support 16 insertion section 17 Connecting part

Claims (1)

(57) [Claims] In a light emitting diode having a light emitting portion and a pair of leads extending from a bottom surface of the light emitting portion, the pair of leads are substantially parallel to each other and a pair of support portions extending from the light emitting portion while approaching each other. A light-emitting diode comprising: a pair of insertion portions extending at an interval wider than the interval between the pair of support portions; and a pair of connection portions connecting the support portion and the insertion portion. 2. The light emitting diode according to claim 1, wherein the light emitting unit has an extension on a bottom side of the light emitting unit. 3. The light emitting diode according to claim 1, wherein a distance between the pair of insertion portions is substantially equal to or smaller than a width of the light emitting portion.