Fastener and housing device including the fastener

A fastener adapted for assembling a first housing to a second housing, wherein the first housing is provided with a protruding portion and a buckling portion, the buckling portion is located at an end of the protruding portion, the second housing has a first surface, a second surface, and a through hole, the second surface is opposite to the first surface, the through hole passes through the first surface and the second surface, and the fastener is disposed at the second housing corresponding to the through hole, and the fastener comprises:

• a first portion movably abutting against the first surface and comprising a first opening, wherein the first opening is in communication with the through hole;
• at least one connecting portion accommodated in the through hole, wherein one end of the at least one connecting portion is connected to the first portion, the at least one connecting portion is spaced apart from an inner edge of the second housing by a gap, and the fastener is movable in the through hole relative to the inner edge of the second housing to change relative positions of the fastener and the inner edge of the second housing;
• at least two elastic portions inclinedly extending into the first opening from the first portion;
• and
• a second portion movably abutting against the second surface and disposed at another end of the at least one connecting portion, wherein the second portion and the first portion are jointly clamped on the second housing, wherein
• during assembling of the first housing to the second housing, the buckling portion pushes the fastener to move along the gap, the first opening is aligned to the buckling portion, the buckling portion is allowed to pass through the elastic portions, and after the buckling portion passes through the elastic portions, the elastic portions return and are clamped on the protruding portion.