Through-hole LED lamp bead

A through-hole LED (light-emitting diode) lamp bead, comprising:

• a light-transmissive colloid arranged on a lead frame, wherein the lead frame comprises a first lead and a second lead which are nonpolar;
• an end portion, extending towards the light-transmissive colloid, of the first lead and the end portion provided with a reflective cup;
• a first light-emitting chip connected into the reflective cup, wherein the first light-emitting chip is electrically connected to the second lead by a bonding wire;
• end portions, extending towards the light-transmissive colloid, of the first lead and the second lead, wherein the end portions are provided with more than one group of oppositely distributed first connection portions and second connection portions;
• a second light-emitting chip connected between the first connection portion and the second connection portion in each group, wherein inner sides of the first connection portion and the second connection portion are respectively provided with a first protection portion and a second protection portion by bending;
• the first light-emitting chip and the second light-emitting chip arranged in a same vertical line;
• a soldering portion is formed at end portion passing through the light-transmissive colloid of each of the first lead and the second lead;
• and
• a coating layer formed at the end portion, close to the soldering portion of the light-transmissive colloid by injection molding.