Lock structure, electric connection box and wire harness

An electric connection box comprising:

• a housing configured to house an electronic component therein, wherein
• the housing includes at least first and second fitting members to be fitted to each other, and has a lock structure configured to hold a fitted state of the first and second fitting members,
• the lock structure includes:
• an engaged body provided to the first fitting member;
• and an engaging body that is provided to the second fitting member, allows the engaged body to be inserted thereinto and removed therefrom along inserting and removing directions opposite to each other, and capable of locking the inserted engaged body in the inserting direction and the removing direction,
• the engaged body includes:
• an engaged main body that is insertable into and removable from the engaging body;
• and an engaged protrusion that protrudes from an outer wall surface of the engaged main body, and
• the engaging body includes:
• first and second engaging walls arranged so as to be opposed to each other with a gap therebetween in a direction orthogonal to the inserting and removing directions;
• third and fourth engaging walls arranged so as to be opposed to each other with a gap therebetween in a direction orthogonal to the inserting and removing directions and to the direction in which the first and second engaging walls are arranged so as to be opposed to each other;
• a housing space which is an internal space surrounded by inner wall surfaces of the first to fourth engaging walls and in which the engaged main body is housed;
• an insertion port through which the engaged main body is inserted into the housing space from a distal end of an end portion thereof on the inserting direction side;
• a locking hole which is a through hole provided in the second engaging wall and through which the engaged protrusion is inserted when the engaged main body is housed in the housing space;
• a communicating port that communicates the housing space to outside on the inserting direction side of the locking hole;
• and a covering portion that covers an end portion of the housed engaged main body on the inserting direction side.

A wire harness comprising:

• an electronic component;
• an electric wire electrically connected to the electronic component;
• and
• a housing configured to house the electronic component and the electric wire therein and lead the electric wire out to outside from inside thereof, wherein
• the housing includes at least first and second fitting members to be fitted to each other, and has a lock structure configured to hold a fitted state of the first and second fitting members,
• the lock structure includes:
• an engaged body provided to the first fitting member;
• and an engaging body that is provided to the second fitting member, allows the engaged body to be inserted thereinto and removed therefrom along inserting and removing directions opposite to each other, and capable of locking the inserted engaged body in the inserting direction and the removing direction,
• the engaged body includes:
• an engaged main body that is insertable into and removable from the engaging body;
• and an engaged protrusion that protrudes from an outer wall surface of the engaged main body, and
• the engaging body includes:
• first and second engaging walls arranged so as to be opposed to each other with a gap therebetween in a direction orthogonal to the inserting and removing directions;
• third and fourth engaging walls arranged so as to be opposed to each other with a gap therebetween in a direction orthogonal to the inserting and removing directions and to the direction in which the first and second engaging walls are arranged so as to be opposed to each other;
• a housing space which is an internal space surrounded by inner wall surfaces of the first to fourth engaging walls and in which the engaged main body is housed;
• an insertion port through which the engaged main body is inserted into the housing space from a distal end of an end portion thereof on the inserting direction side;
• a locking hole which is a through hole provided in the second engaging wall and through which the engaged protrusion is inserted when the engaged main body is housed in the housing space;
• a communicating port that communicates the housing space to outside on the inserting direction side of the locking hole;
• and a covering portion that covers an end portion of the housed engaged main body on the inserting direction side.