Lock structure, electrical connection box, and wire harness

An electrical connection box comprising:

• a housing that houses an electronic component inside, wherein
• the housing includes two assembly members to be assembled with each other through a relative rotation operation pivoted about a relative rotational axis, and a lock structure holding the two assembly members being assembled with each other,
• the lock structure includes
• a first engagement body that includes a first engagement member and first and second opposing wall parts extending in a same direction and disposed opposite to each other with the first engagement member interposed between the first and the second opposing wall parts and is disposed, in one of the two assembly members, at a position separated from the relative rotational axis in a direction orthogonal to an axis line direction of the relative rotational axis so that a direction orthogonal to a direction in which the first and the second opposing wall parts are disposed opposite to each other and a direction in which the first and the second opposing wall parts extend is aligned with the axis line direction of the relative rotational axis, and
• a second engagement body that includes a second engagement member engaged with the first engagement member when the assembly of the two assembly members is completed and third and fourth opposing wall parts extending in a same direction and disposed opposite to each other with the second engagement member interposed between the third and the fourth opposing wall parts and that is disposed, in the other of the two assembly members, at a position separated from the relative rotational axis in the direction orthogonal to the axis line direction of the relative rotational axis so that a direction orthogonal to a direction in which the third and the fourth opposing wall parts are disposed opposite to each other and a direction in which the third and the fourth opposing wall parts extend is aligned with the axis line direction of the relative rotational axis,
• the first engagement body includes a first space and a second space, the first space being provided between the first opposing wall part on the relative rotational axis side and the first engagement member to allow rotation of the third opposing wall part on the relative rotational axis side relative to the first engagement body, which is pivoted about the relative rotational axis until engagement between the first and the second engagement members is completed, the second space being provided between the second opposing wall part and the first engagement member to allow rotation of the fourth opposing wall part relative to the first engagement body, which is pivoted about the relative rotational axis until engagement between the first and the second engagement members is completed, and
• the second engagement body further includes a body that includes the second engagement member, the body between the third opposing wall part and the fourth opposing wall part and separated from each of the third opposing wall part and the fourth opposing wall part by a respective gap.

A wire harness comprising:

• an electronic component;
• an electric wire electrically connected with the electronic component;
• and
• a housing that houses inside the electronic component and the electric wire, the electric wire being extended from inside to outside, wherein
• the housing includes two assembly members to be assembled with each other through a relative rotation operation pivoted about a relative rotational axis, and a lock structure holding the two assembly members being assembled with each other,
• the lock structure includes
• a first engagement body that includes a first engagement member and first and second opposing wall parts extending in a same direction and disposed opposite to each other with the first engagement member interposed the first and the second opposing wall parts and is disposed, in one of the two assembly members, at a position separated from the relative rotational axis in a direction orthogonal to an axis line direction of the relative rotational axis so that a direction orthogonal to a direction in which the first and the second opposing wall parts are disposed opposite to each other and a direction in which the first and the second opposing wall parts extend is aligned with the axis line direction of the relative rotational axis, and
• a second engagement body that includes a second engagement member engaged with the first engagement member when the assembly of the two assembly members is completed and third and fourth opposing wall parts extending in a same direction and disposed opposite to each other with the second engagement member interposed the third and the fourth opposing wall parts and is disposed, in the other of the two assembly members, at a position separated from the relative rotational axis in the direction orthogonal to the axis line direction of the relative rotational axis so that a direction orthogonal to a direction in which the third and the fourth opposing wall parts are disposed opposite to each other and a direction in which the third and the fourth opposing wall parts extend is aligned with the axis line direction of the relative rotational axis,
• the first engagement body includes a first space and a second space, the first space being provided between the first opposing wall part on the relative rotational axis side and the first engagement member to allow rotation of the third opposing wall part on the relative rotational axis side relative to the first engagement body, which is pivoted about the relative rotational axis until engagement between the first and the second engagement members is completed, the second space being provided between the second opposing wall part and the first engagement member to allow rotation of the fourth opposing wall part relative to the first engagement body, which is pivoted about the relative rotational axis until engagement between
• the first and the second engagement members is completed, and the second engagement body further includes a body that includes the second engagement member, the body between the third opposing wall part and the fourth opposing wall part and separated from each of the third opposing wall part and the fourth opposing wall part by a respective gap.