LED lamp with first fin having gap portion

Abstract

An LED lamp includes: a lamp shell; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source disposed in the lamp shell; and a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; wherein the heat sink comprises 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, at least one of the second fins includes a third portion and two fourth 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.

Dependencies are inferred from the claim text.