Waterproof mechanism, card connector, and metal housing

A waterproof mechanism, comprising:

• a telescopic member;
• a thrusting member;
• and
• a sleeve,
• wherein
• the telescopic member comprises a telescopic base that is retractable and an opening provided on an upper end of the telescopic base,
• the thrusting member comprises a head portion and a rod portion having an outer diameter smaller than an outer diameter of the head portion,
• the sleeve comprises a cavity penetrating through ends of the sleeve,
• the sleeve is received on the rod portion of the thrusting member,
• a part of the thrusting member and a part of the sleeve are inserted into the opening of the telescopic base,
• the head portion of the thrusting member is held between the telescopic base and the sleeve, and
• an inner wall surface of an upper portion of the opening of the telescopic base and an outer wall surface of a lower portion of the sleeve are in a waterproof connection.

A card connector, comprising:

• a terminal module;
• a metal casing;
• a card-retracting mechanism;
• a waterproof mechanism;
• and
• a card holder,
• wherein
• the waterproof mechanism comprises a telescopic member, a thrusting member, and a sleeve,
• the telescopic member comprises a telescopic base that is retractable and an opening provided on an upper end of the telescopic base,
• the thrusting member comprises a head portion and a rod portion having an outer diameter smaller than an outer diameter of the head portion,
• the sleeve comprises a cavity penetrating through ends of the sleeve,
• the sleeve is received on the rod portion of the thrusting member,
• a part of the thrusting member and a part of the sleeve are inserted into the opening of the telescopic base,
• the head portion of the thrusting member is held between the telescopic base and the sleeve,
• an inner wall surface of an upper portion of the opening of the telescopic base and an outer wall surface of a lower portion of the sleeve are in a waterproof connection,
• the card holder is configured to carry an electronic card and move between the metal casing and the terminal module,
• the card-retracting mechanism comprises a push rod mounted on a lateral side of the card connector,
• the card holder comprises a card holder frame and a cover plate located at a top of the card holder frame,
• a through-hole is provided at a position of the cover plate corresponding to the waterproof mechanism,
• the telescopic base of the waterproof mechanism cooperates with an end of the push rod, and
• the through-hole of the cover plate corresponds to the thrusting member.

A metal casing, comprising:

• a frame portion;
• a slot penetrating through the frame portion,
• a card holder configured to be inserted through the slot;
• and
• a sleeve integrally formed on an inner side of the frame portion,
• wherein the sleeve is hollow to form a cavity and the cavity penetrates through the frame portion.