Electrical connection structure

An electrical connection structure comprising:

• a case having a holding portion;
• and
• a power source distribution unit which is inserted into and held in the holding portion, wherein
• the holding portion includes:
• a housing space which opens in one side in a first direction and in which the power source distribution unit is housed by relatively moving the power source distribution unit to the other side in the first direction with respect to the case;
• and
• a wall defining the housing space, and
• the power source distribution unit is provided with a main body including:
• a bus bar having a power source connection portion and a plurality of load connection portions, and capable of distributing power source;
• a plurality of fuse portions interposed between the power source connection portion and the load connection portion;
• and a cover for holding the bus bar,
• the main body is formed so as to have an approximately twice-rotation symmetrical shape with respect to an imaginary line extending in the first direction,
• a projection is formed at least on one of the main body and the holding portion,
• a groove into which the projection is inserted when the power source distribution unit is inserted into the housing space in a state of a normal position, and a restriction wall which interferes with the projection when the power source distribution unit is inserted into the housing space in a state of an inverse position are formed at least on the other of the main body and the holding portion, and
• a projection side inclined surface capable of guiding the projection into the groove by coming into contact with the restriction wall when the power source distribution unit is inserted into the housing space in a state of the normal position is formed in the projection.