Patent ID: 9514971
Filing Date: 2016-12-06
CPC Classification: H01L

Claim Text:
1. A door for a thin plate container which closes an opening formed in a container body of a thin plate container in which a thin plate is received, the door comprising: a door body having latch passage holes in circumferential portions thereof, the latch passage holes corresponding to latch recesses formed in an inner circumferential surface of the opening, and a component installation space; a rotary cam received in the component installation space such that the rotary cam can be manipulated to rotate; and latch arms each having one end connected to the rotary cam in the component installation space, the latch arms reciprocating depending on a direction of rotation of the rotary cam so that free end areas thereof enter or exit the latch recesses through the latch passage holes, wherein, when the rotary cam rotates in a locking direction, the latch arms move along straight lines until at least portions of the free end areas are inserted into the latch recesses and then pivot so that the free end areas are pressed toward the container body, wherein the rotary cam comprises: a cam body portion rotatably disposed in the component installation space; and cam profile portions protruding from circumferential portions of a rear surface of the cam body portion toward a bottom of the component installation space, the cam profile portions being connected to one ends of the latch arms such that the cam profile portions and the latch arms can mutually move relative to each other, thereby guiding linear movement and pivoting of each of the latch arms, wherein each of the cam profile portions comprises: a linear cam profile extending from a point (A) on an area between a center and a circumferential end of the cam body portion to a point (B) on the circumferential end of the cam body portion, the point (B) being circumferentially spaced apart from the point (A), wherein the linear cam profile guides a corresponding latch arm of the latch arms to move along a straight line; and a pivotal cam profile being gradually bent toward the container body along a central axis of the rotary cam while being circumferentially spaced apart from the point (B) on the circumferential end of the cam body portion, wherein the pivotal cam profile guides a corresponding latch arm of the latch arms to pivot.