Patent ID: 10724727

Abstract:
An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell, the heat sink comprises fins and a base; a power source; a light emitting surface connected to the heat sink of the passive heat dissipating element and includes LED chip sets having LED chips; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover connected with the heat sink and having a light output surface and an end surface, the end surface is formed with a vent to let air flow from outside of the LED lamp into both the first heat dissipating channel and the second heat dissipating channel through the vent. The fins of the heat sink include first fins and second fins, each of the first fins is divided into two portions in a radial direction of the LED lamp, the two portions are divided with a gap portion, each of the second fins has a third portion and a fourth portion extending therefrom, the fourth portions are located radially outside the third portions, the third portion is connected to the fourth portion through a transition portion, the transition portion has a buffer section and a guide section, a direction of any tangent of the guide section is separate from the gap portion.