Patent ID: 9653216
Date: 2017-05-16
CPC Classifications: H01G

Claim:
1. A sealing element disposed at an open end of a capacitor casing and forming a hermetic seal with the capacitor casing in order to retain a capacitor element in the capacitor casing, comprising: a cover body having a first surface exposed from the capacitor casing and a second surface oppositely arranged from the capacitor element, the cover body having a pair of terminal holes arranged thereon, the pair of terminal holes extending through the first surface and the second surface, and each terminal hole receiving a terminal of the capacitor element; an exterior convex portion arranged on the first surface of the cover body, the exterior convex portion protruding from the first surface of the cover body and having a first abutting surface arranged at an apex thereof, and at least one slot being formed on the first abutting surface and the at least one slot being surrounded by the first abutting surface; and an interior convex portion arranged on the second surface of the cover body to interface with the capacitor element, the interior convex portion having a second abutting surface arranged at an apex thereof; wherein the second abutting surface is partially in contact with a surface of the corresponding capacitor element; wherein the terminal has a first portion located in the terminal hole, a second portion located in a circuit board, and a third portion connected between the first portion and the second portion, and the first abutting surface of the exterior convex portion is abutted against an outer surface of the circuit board for exposing the third portion of the terminal from the terminal hole and the circuit board and separating the open end of the capacitor casing from the circuit board; wherein the exterior convex portion is arranged between the two terminal holes, the at least one slot formed on the first abutting surface of the exterior convex portion defines an expansion space, two lateral portions of the exterior convex portion each having a notch arranged thereon to maintain a gap between the two lateral portions of the exterior convex portion and the two terminal holes; and wherein the exterior convex portion is made of elastic materials such that when the capacitor is being soldered and a pressure is being built up inside the capacitor casing, the exterior convex portion can be deformed because of the at least one slot formed on the first abutting surface thereof to thus absorb the pressure built-up inside the capacitor casing.