Liquid-proof structure of fitting body, electrical connection box, and wire harness

An electrical connection box, comprising:

• a housing that stores therein an electronic component, wherein
• the housing includes:
• a liquid-proof structure that includes at least one of first and second fitting members fitted to each other and that maintains a liquid-proof property of a fitted portion of the first and second fitting members,
• the liquid-proof structure includes:
• a first opening periphery part formed on an inside of the first fitting member;
• a second opening periphery part formed on an outside of the first fitting member,
• an opening periphery part of the second fitting member, being fitted to a gap between the first opening periphery part and the second opening periphery part;
• and
• a buffer part defined between an inner wall surface of the second opening periphery part and an outer wall surface of the opening periphery part while the first fitting member and the second fitting member are being fitted, and
• the buffer part is a space part defined by a concave part provided on at least one of the inner wall surface of the second opening periphery part and the outer wall surface of the opening periphery part.

A wire harness, comprising:

• an electronic component;
• an electric wire electrically connected to the electronic component;
• and
• a housing that stores therein the electronic component and the electric wire, and from which the electric wire is drawn from inside to outside, wherein
• the housing includes a liquid-proof structure that includes at least one of first and second fitting members fitted to each other, and that maintains a liquid-proof property of a fitted portion of the first and second fitting members,
• the liquid-proof structure includes:
• a first opening periphery part formed on an inside of the first fitting member;
• a second opening periphery part formed on an outside of the first fitting member;
• an opening periphery part of the second fitting member, being fitted to a gap between the first opening periphery part and the second opening periphery part;
• and
• a buffer part defined between an inner wall surface of the second opening periphery part and an outer wall surface of the opening periphery part while the first fitting member and the second fitting member are being fitted, and
• the buffer part is a space part defined by a concave part provided on at least one of the inner wall surface of the second opening periphery part and the outer wall surface of the opening periphery part.