Abstract: An adjustable buckling structure for connectors includes a connecting body, two buckling devices and two adjusting rods. The connecting body has a retaining portion formed on each lateral side. Two buckling devices are pivotally connected to two lateral sides of the connecting body, respectively. Each adjusting rod has an acentric section and two rod ends. Each buckling device includes a first and a second linkages. The first linkage has one end pivotally connected to the connecting body and includes a hook formed on the other end thereof. The second linkage has one end pivotally connected to the first linkage and includes a through hole formed on the other end. The adjusting rod is disposed in the through hole with the two rod ends protruded out from the through hole.

Abstract: A waterproof structure applied to an alternating current plug and an alternating current socket includes a plug body and a socket body. The plug body has an inserting portion, a covering portion formed thereon, a limiting portion formed between the plug body and the covering portion, and a washer positioned at one end of the limiting portion to be adjacent to the inserting portion. The socket body has an opening relative to the inserting portion for insertion, and a receiving portion formed thereon suitable for the covering portion to be engaged. The structure will not only be more stable than before to prevent separation occurred by an external force, but also be waterproof equally.

Abstract: A waterproof structure applied to an alternating current plug and an alternating current socket includes a plug body and a socket body. The plug body has an inserting portion, a covering portion formed thereon, a limiting portion formed between the plug body and the covering portion, and a washer positioned at one end of the limiting portion to be adjacent to the inserting portion. The socket body has an opening relative to the inserting portion for insertion, and a receiving portion formed thereon suitable for the covering portion to be engaged. The structure will not only be more stable than before to prevent separation occurred by an external force, but also be waterproof equally.

Abstract: An adjustable locking device includes a main body, at least a link structure, and at least a buckling device. The main body includes a connection portion. The connection portion provides one end of the link structure to connect thereon. The link structure includes a link element and an adjusting element connected to the link element. The link element provides a buckling device to pivotally connect thereon. The buckling device includes an actuating element and a buckling element. The actuating element and the buckling element are mutually connected, whereby the link structure can be moved within the connection portion of the main body, so as to change the position of the buckling device. The connection tightness between the main body and the connection port is thus enhanced.