Connection device having a resin member between a relay terminal and a conductive terminal

A connection device comprising:

• a conductive first counterpart terminal formed into a tubular shape, one side of the first counterpart terminal in a first direction being opened and the other side thereof being blocked;
• a conductive relay terminal provided inside the first counterpart terminal and formed extending along the first direction;
• a conductive interposition member provided inside the first counterpart terminal, interposed between the first counterpart terminal and the relay terminal with respect to an intersection direction intersecting with the first direction, and being in contact with the first counterpart terminal and the relay terminal;
• an elastic member provided inside the first counterpart terminal, interposed between the relay terminal and a blocked end portion that is an end portion on the blocked side of the first counterpart terminal with respect to the first direction, and elastically deformable along the first direction;
• and
• a second counterpart terminal that is a conductive terminal different from the first counterpart terminal, and coming in contact with an end portion on an opposite side of a side of the elastic member of the relay terminal with respect to the first direction, wherein
• the elastic member includes a resin member to be filled between the blocked end portion and the relay terminal.