An electronic device includes a connector into which a cable for wired communication is inserted and a slot into which a removable storage medium is inserted in order to exchange information with another device. Therefore, the housing of an electronic device includes a hole for exposing an electronic device terminal such as a connector or slot to the outside of the housing. Hereinafter, in the present specification, a hole for exposing an electronic device terminal to the outside of the housing is referred to as a “socket”. Generally, the socket of an electronic device is covered and protected with a cover.
Recent electronic devices are required to be waterproof and need to prevent water from entering through the sockets. Therefore, packings are provided on covers that cover the sockets to protect the electronic device terminals. Structures for preventing water from entering through the sockets are classified into a structure called a longitudinal compression type in which a packing is placed on the front side of the opening of the socket and a structure called a transverse compression type in which a packing is put in the socket and brought into contact with the wall. The longitudinal compression type needs to secure a packing margin around the opening of the socket, and thus hinders miniaturization of the electronic device, so the adoption of the transverse compression type is progressing.
Patent Literature 1 discloses a transverse compression type waterproof structure.