Patent ID: 8962171
Filing Date: 2015-02-24
Classification: H01M,Y02E

Abstract:
1. A cover comprising: a first cover portion; a second cover portion; and a coupling portion that is arranged in a position lower than upper surfaces of the first cover portion and the second cover portion, between the first cover portion and the second cover portion, wherein the coupling portion includes a connection portion that is fixed to at least any one of the first cover portion and the second cover portion and a hinge portion that is thinner than the connection portion, the second cover portion is provided rotatably with respect to the first cover portion using the hinge portion as a supporting point for rotation, the hinge portion is provided such that hinge end portions on both sides are thicker than a hinge center portion, and each of the hinge end portions decrease its width from a side of the first cover portion to a side of the second cover portion and is formed such that a side end surface of the hinge end portions is a curved surface which is gently inclined from a side of the first cover portion to a side of the second cover portion and that an upper surface of the hinge end portions is formed into a substantially arc-shaped curved surface which is thinnest in its center and inclined upward to gradually become thicker from the center toward both support ends.