WO2009046575A1

WO2009046575A1 - Led lamp cap

Info

Publication number: WO2009046575A1
Application number: PCT/CN2007/002937
Authority: WO
Inventors: Ben Fan
Original assignee: He Shan Lide Electronic Enterprise Company Ltd.
Priority date: 2007-10-12
Filing date: 2007-10-12
Publication date: 2009-04-16

Abstract

A LED lamp cap comprises: a LED chip (3) mounted on the leadframe (4), a packaging body (2) covering the leadframe (4), two lamp pins (41) extending from the leadframe (4) to the underside of the packaging body (2), wires (6) electrically connected with the packaging body (2) respectively, a partition (5) disposed between the lamp pins (41), an intergrative lamp holder (1) formed to wrap the lamp pins (41) and a part of the wires (6) on the underside of the packaging body (2).

Description

LED lamp head

The present invention relates to a decorative light string, and more particularly to a light head for an LED light string. Background technique

The decorative light string is a kind of decorative light which is connected by a plurality of light bulbs in series or in parallel for decoration occasions. Since the decorative light string is generally installed outdoors, the waterproofness and the reliability of the electrical connection are very important. In the prior art, the waterproofness of the string and the reliability of the electrical connection are generally ensured by the following connection methods. Referring to FIG. 1 , a lamp holder for a light string generally includes two major components: a bulb 01 and a lamp holder 03. Two spring pieces 04 are symmetrically embedded in the lamp holder 03, and the two elastic pieces 04 are electrically connected to the electric wires 05 respectively; The bottom is generally also provided with a soft core 02, the lamp foot of the bulb 01 protrudes from the bottom of the soft core 02, and one end of the bulb 01 with the soft core 02 is inserted into the lamp holder 03, and the two lamp legs are respectively associated with the lamp holder 03. The two elastic pieces 02 are electrically contacted, and the upper end of the soft core 02 is generally provided with a reverse side 021 to cover the port of the lamp holder 03 for waterproofing purposes, and the outer wall is generally closely matched with the lamp holder 03 for the purpose of fastening and secondary waterproofing. However, the opposite side 021 may not completely block the rainwater, and due to manufacturing reasons, the tight fit of the soft core 02 and the lamp holder 03 may not be completely free of gaps, so in actual use, there may still be rainwater infiltration lamps. In the seat, the short circuit of the bulb is caused, especially after the long-term use of the lamp string causes the soft core 02 and the lamp holder 03 to age, the waterproof sealing method is more unreliable. Furthermore, the lamp string using such a structure is not reliable in electrical connection. Since the lamp pin of the lamp 01 is electrically contacted by the elastic force of the elastic piece, the two are not firmly connected, and are easily released during wind and rain. In addition, the lamp cap of this structure has high manufacturing and maintenance costs due to various components. Summary of the invention

The technical problem to be solved by the invention is that the waterproofing effect is better, the product structure is simpler, and the lamp head of the LED Christmas light string manufactured by the invention is easier to produce.

The present invention solves the above technical problems by the following technical solutions:

An LED lamp head comprises an LED light-emitting chip, a bracket and a lamp holder, wherein the light-emitting chip is mounted on the bracket, and the upper part of the bracket is covered with a package body, and the bracket leads two lamp legs to the lower part of the package body, and the connection wires are electrically connected to the two lamp pins respectively. A spacer is disposed between the two lamp legs; a lower portion of the package body forms a lamp holder that covers the lamp pin and a part of the connecting wires and is integrated with the package body, the lamp legs and the connecting wires.

The invention has the following advantages: since the illuminating chip is mounted on the bracket, the upper portion of the bracket is covered with the package body, and the lower portion of the package body forms a covered lamp foot and a part of the connecting wire and is integrated with the package body, the lamp foot and the connecting wire. Structural

Confirmation The lamp holder has such a structure that the lamp holder and the encapsulant are integrated, which eliminates the water leakage hazard at the joint of the encapsulant and the lamp holder, greatly improves the waterproof capability, and at the same time, omits the manual installation process of mounting the package to the lamp holder, so that the invention Can use the machine for efficient mass production.

In addition, the present invention can be further improved by the following technical solutions:

The lower portion of the package body forms a connecting handle, and the lamp holder and the connecting handle are connected into an integral structure, which is more advantageous for the connection between the lamp holder and the package body.

The connecting handle is provided with a recess, so that part of the material of the socket is trapped in the recess during the connection between the socket and the connecting handle, and the connection between the two is more reliable.

The groove extends the connection to extend circumferentially, so that the groove area is larger, and the lamp holder is trapped in the groove more material, further enhancing the connection reliability of the lamp holder and the connecting handle.

The outer surface of the package is formed with grooves or protrusions to scatter light, and the light is softer on the outside. The grooves or protrusions are regularly distributed such that the scattering of light is more uniform.

A heat shrinkable sleeve covering the lamp legs and the wires is also placed at the electrical connection between the wires and the lamp legs, so as to prevent the mold from being displaced during the injection of the lamp holders, so that some of the wires or the lamp legs are exposed outside the lamp holder. . DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a schematic view of the structure of the prior art;

Figure 2 is a schematic view of the external structure of the present invention;

Figure 3 is a second schematic view of the external structure of the present invention;

Figure 4 is a schematic cross-sectional view of the present invention;

Figure 5 is a schematic structural view of a package body of the present invention;

Figure 6 is a third schematic view of the external structure of the present invention;

Figure 7 is a fourth schematic view of the external structure of the present invention. detailed description

Referring to FIG. 3, FIG. 4 and FIG. 5, an LED lamp head is mounted on the bracket 4, and the bracket 4 is provided with two lamp legs 41 connected to an external power source. The positive and negative electrodes of the chip 3 pass through the gold wire and the two lamp pins. 41 electrical connection; the upper part of the bracket 4 is packaged into a lampshade-shaped package body 2 by injection molding, the encapsulant may be epoxy resin, acrylic or glass, and the shape of the package body 2 may be cylindrical as shown in FIG. 2, as shown in FIG. The strawberry shape shown is a spherical shape as shown in FIG. 7 or a long cylindrical shape as shown in FIG. 6; the two lamp legs 41 of the bracket 4 are led out to the lower portion of the package body 2, and the connecting wires 6 are respectively connected with the two lamps. The legs 41 are electrically connected; a spacer 5 for electrically isolating the two legs 41 is disposed between the two legs 41 to prevent the two legs 41 or the wires 6 connected thereto from being short-circuited during manufacture or use; the lower part of the package 2 The lamp holder 1 is integrally molded into a lamp body 41 and a part of the connecting wires 6 and integrated with the package body 2, the lamp pins 41 and the connecting wires 6. Since the illuminating chip 3 is mounted on the bracket 4, the upper portion of the bracket 4 is covered with the package body 2, and the lower portion of the package body 2 forms a covered lamp leg 41 and a part of the connecting wire 6 and the package body 2, the lamp pin 41 and the connecting wire 6-integrated lamp holder 1, such that the package body 2 and the LED package colloid are integrally formed, and the lamp holder 1 is integrated with the encapsulant 2, which eliminates the water leakage hazard at the junction of the package body 2 and the lamp holder 1, and greatly improves the leakage. The waterproof ability, at the same time, the manual mounting process of mounting the package 2 to the socket 1 is omitted, so that the present invention can use the machine for efficient mass production.

In order to facilitate the connection between the lamp holder 1 and the package body 2, a connection handle 21 may be formed in the lower portion of the package body 2 during the process of encapsulating the package body 2, so that when the lamp holder 1 is injection molded, The connection handle 21 is an adhesion point, which facilitates the connection between the lamp holder 1 and the package body 2; further, in order to improve the reliability of the connection between the lamp holder 1 and the connection handle 21, the outer peripheral surface of the connection handle 21 may be extended. The groove 211 extends circumferentially, so that part of the material of the lamp holder is trapped in the groove 211 during the injection of the lamp holder 1, and the connection between the two is more reliable.

At the same time, a groove or a protrusion may be formed on the outer surface of the package body 2 to scatter light, and the light is softer on the outside; in order to make the light scattering more uniform, the groove or protrusion is preferably In a regular distribution.

In addition, a heat shrinkable sleeve 7 covering the lamp foot 41 and the wire 6 may be further disposed at the electrical connection between the wire 6 and the lamp pin 41, thereby preventing the mold from being displaced during the injection of the lamp holder 1. Some of the wires or legs are exposed outside the lamp holder.

Claims

Rights request

1 . An LED lamp head comprising an LED light-emitting chip, a bracket and a lamp holder, wherein the light-emitting chip is mounted on the bracket, and the upper part of the bracket is covered with a package body, and the bracket leads two light legs to the lower part of the package body, and the connecting wires are respectively The two lamp pins are electrically connected, and the spacers are disposed between the two lamp legs; the lower portion of the package body forms a lamp holder that covers the lamp legs and a part of the connecting wires and is integrated with the package body, the lamp legs and the connecting wires.

2. The LED lamp cap according to claim 1, wherein a lower portion of the package body forms a connection, and the lamp holder and the connection handle are connected in an integrated structure.

3. An LED lamp cap according to claim 2, wherein the connecting handle is provided with a recess.

4. An LED lamp cap according to claim 3, wherein said groove extends said connection to extend circumferentially.

The LED lamp cap according to any one of claims 1 to 4, wherein the outer surface of the package is formed with a groove or a protrusion.

6. An LED lamp cap according to claim 5 wherein the grooves or projections are regularly distributed.

7. The LED lamp cap according to claim 1, wherein a heat shrink sleeve covering the lamp pin and the wire is further disposed at an electrical connection between the wire and the lamp pin.