JPH06845Y2 - Pin terminal LED - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a so-called pin terminal LED.

[Conventional technology]

Conventionally, such a pin terminal LED is configured as shown in FIG. 2, for example. That is, in FIG. 2, the pin terminal LED 1 has a substantially cylindrical iron stud 2, three LED chips 3 mounted on the upper surface of the stud 2 in a line, and the stud 2 is vertically arranged. Four lead pins 4 which are respectively inserted into the four bores 2a penetrating through, the upper ends of which project slightly from the upper surface of the stud 2, and the lower ends of which project below the stud 2, and the studs. And a lens 5 formed of a transparent resin, which is attached to the upper surface of 2 so as to cover each LED chip 3.

The lead pins 4 are inserted into the bores 2a of the studs 2 by insert-molding an insulating material 6 made of a resin such as polyester into the bores 2a.
The lead pins 4 are insulated from the studs 2, and the upper ends of the lead pins 4 are respectively L-shaped as shown in FIG. 2 (B).
It is bonded to the upper surface of the ED chip 3 or the stud 2 with a gold wire 7 or the like.

[Problems to be solved by the invention]

However, in such a pin terminal LED 1, the lens 5 is simply attached to the stud 2 while integrally surrounding the LED chips 3 on the upper surface of the stud 2, and thus the stud of the lens 5 is not provided. The adhesion strength to 2 is not very high. Therefore, especially when, for example, a lateral impact is applied to the lens 5, the lens 5 easily comes off the upper surface of the stud 2, and at that time, the LED chip 3 may be peeled off from the upper surface of the stud 2. is there. Further, when the gold wire 7 is broken, L
The ED chip 3 has a defect that it does not work.

Moreover, since the insulating material 6 and the lens 5 are separately molded, the number of manufacturing steps is increased, and thus the manufacturing cost is increased.

In view of the above points, the present invention provides a pin terminal LED that enhances the adhesion strength of the lens to the stud so that the lens does not come off from the upper surface of the stud even when a shock is applied to the lens and the manufacturing cost is low. It is intended to be provided.

[Means and Actions for Solving Problems]

According to the present invention, the object is to insert a substantially cylindrical metal stud, at least one LED chip mounted on the upper surface of the stud, and a plurality of bores vertically passing through the stud, respectively. A lead pin whose upper end projects slightly from the upper surface of the stud and is bonded to the LED chip or the upper surface of the stud;
It is composed of a lens integrally molded on the upper surface of the stud so as to cover each LED chip, and when the lens is molded, resin forming the lens is poured into each bore to integrally insert-mold the lens. Each of the lead pins is achieved by a pin terminal LED insulated from the stud by the insulated portion.

According to this invention, the lens adheres to the upper surface of the stud, and at the time of molding, the resin also flows into the bore opening in the upper surface of the stud and is cured,
Even in this bore, the resin forming the lens is integrated with the stud, so that the contact area of the lens with respect to the stud is increased, and thus the adhesion strength of the lens with respect to the stud is increased. In addition, when a lateral impact is applied to the lens, the impact is absorbed by the portion of the lens that is inside the bore because a portion of the lens projects into the bore. It does not come off from the top surface of the stud. In addition, since a part of the resin that constitutes the lens flows into the bore when the lens is molded, it is appropriately adjusted depending on the resin that enters the bore even if the resin amount is not accurately measured during the lens molding. As a result, manufacturing is facilitated and cost is reduced, and bubbles and the like do not remain near the inlet of the bore, and a more appropriate lens can be molded.

〔Example〕

Hereinafter, the present invention will be further described based on the embodiments shown in the drawings.

FIG. 1 shows an embodiment of a pin terminal LED according to the present invention. The pin terminal LED 10 has a substantially cylindrical iron stud 11 and three studs mounted on the upper surface of the stud 11 in line. LED chips 12, four lead pins 14 respectively inserted into four bores 11a vertically penetrating the stud 11, and a transparent resin attached so as to cover the LED chips 12 on the upper surface of the stud 11. And a lens 15 molded in.

Each lead pin 14 has an upper end slightly protruding from the upper surface of the stud 11 and is bonded to the LED chip 12 or the upper surface of the stud 11 by a gold wire 13 or the like, and further has a lower end protruding below the stud 11.

The above configuration is similar to that of the conventional pin terminal LED.

In the embodiment of the present invention, when molding the lens 15,
The resin that constitutes the lens 15 is also poured into the gap between the lead pin 14 and the bore 11a that is open on the upper surface of the stud 11 and is cured, so that the insulating portion 15a integrated with the lens 15 is formed. Is insert molded. As a result, the lens 15 is integrated with the stud 11 even in the bore 11a.

The pin terminal LED according to the present invention is constructed as described above, and the pin terminal LED 10 operates in the same manner as the conventional one, and when the lens 15 is molded, a part of the resin is placed on the upper surface of the stud 11. Since it also flows into the open bore 11a and is hardened, the adhesion strength of the lens 15 to the stud 11 is increased.

It should be noted that the amount of resin used when molding the lens 15 does not have to be measured very accurately because a part of the resin also flows into the bore 11a, and can be adjusted appropriately within the bore 11a. Become. Further, at this time, even if air bubbles are generated near the entrance of the bore 11a, the air bubbles are generated together with the resin in the bore 11a.
Since it moves into the inside of a, the light emission of the pin terminal LED 10 is not disturbed.

[Effect of device]

As described above, according to the present invention, a substantially cylindrical metal stud, at least one LED chip mounted on the upper surface of the stud, and a plurality of bores vertically penetrating the stud are respectively inserted. And a lead pin whose upper end slightly projects from the upper surface of the stud and is bonded to the LED chip or the stud upper surface, and a lens integrally formed on the stud upper surface so as to cover the LED chip. Pin terminal L
In the ED, each lead pin is insulated from the stud by the insulating portion which is insert-molded integrally with the lens by the resin forming the lens entering into each bore when the lens is molded. Therefore, the lens adheres to the upper surface of the stud, and at the time of molding, the resin also flows into the bore that opens on the upper surface of the stud and is cured. Since it is integrated with the stud, the contact area of the lens with respect to the stud is increased, and therefore the adhesion strength of the lens with respect to the stud is further enhanced as compared with the conventional case.

Also, when a lateral impact is applied to the lens,
By having a part of the lens plunge into this bore,
The impact is absorbed by the portion of the lens within the bore so that the lens does not dislodge from the top surface of the stud.

In addition, since a part of the resin that constitutes the lens enters the bore during lens molding, it is appropriately adjusted by the resin entering the bore even if the amount of resin is not accurately measured during lens molding. As a result, manufacturing is facilitated and cost is reduced, and bubbles and the like do not remain near the inlet of the bore, and a more appropriate lens can be molded.

Thus, according to the present invention, the adhesion strength of the lens to the stud is high, and therefore, even if an impact is applied to the lens, the lens does not come off from the upper surface of the stud.
An extremely excellent pin terminal LED with low manufacturing cost can be provided.

[Brief description of drawings]

FIG. 1 shows an embodiment of a pin terminal LED according to the present invention, (A) is a plan view and (B) is a sectional view. FIG. 2 shows an example of a conventional pin terminal LED, (A) is a plan view and (B) is a sectional view. 10 ... Pin terminal LED; 11 ... Stud; 11a ... Bore; 12 ... LED chip; 13 ... Gold wire; 14
... Lead pin; 15 ... Lens; 15a ... Insulation part.

Claims (1)

[Scope of utility model registration request] 1. A substantially cylindrical metal stud, at least one LED chip mounted on the upper surface of the stud, and a plurality of bores vertically penetrating the stud, the upper ends of which are formed by the stud. In a pin terminal LED composed of a lead pin slightly protruding from the upper surface and bonded to each LED chip or stud upper surface, and a lens integrally formed on the stud upper surface so as to cover each LED chip, Each of the lead pins is insulated from the stud by an insulating portion that is insert-molded integrally with the lens when a resin forming the lens enters into each bore when the lens is molded. Yes, pin terminal LED.