Waterproof component
View Patent ↗A waterproof component includes a housing body, a mat seal, and a mat seal cover. A locking claw of the housing body is inserted in an attachment hole of a wall together with an attachment hole insertion portion and has an elastically deformable support wall and a claw portion formed at a tip of the support wall and protruding outward from an outer surface of the support wall. The mat seal cover includes a protection protrusion configured to prevent displacement of the support wall toward a direction other than a direction of an elastic deformation of the support wall for insertion of the claw portion in the attachment hole.
1. A waterproof component comprising:
a housing body attached to a wall having an attachment hole through which an electric wire penetrates, the housing body including:
an attachment hole insertion portion inserted in the attachment hole and having a mat seal accommodating chamber formed inside the attachment hole insertion portion, the mat seal accommodating chamber having a bottom wall;
an abutting portion configured to abut on a first periphery of the attachment hole;
a locking claw elastically deformably provided on an insertion tip side of the attachment hole insertion portion, the locking claw inserted in the attachment hole together with the attachment hole insertion portion and locked to a second periphery of the attachment hole opposite to the first periphery; and
a cover locking portion provided on the insertion tip side of the attachment hole insertion portion;
a mat seal accommodated in the mat seal accommodating chamber and having an electric wire press-fitting hole through which the electric wire penetrates; and
a mat seal cover locked to the cover locking portion, the mat seal cover configured to sandwich the mat seal with the bottom wall and hold the mat seal in the mat seal accommodating chamber, wherein
the locking claw includes:
an elastically deformable support wall; and
a claw portion formed at a tip of the support wall and protruding outward from an outer surface of the support wall, and
the mat seal cover includes a protection protrusion configured to prevent displacement of the support wall toward a direction other than a direction of an elastic deformation of the support wall for insertion of the claw portion in the attachment hole.
2. The waterproof component according to claim 1 , wherein
a tip side in a protruding direction of the claw portion has a circular-arc shape,
the claw portion has a locking surface on a side of the claw portion abutting on the second periphery of the attachment hole, and
the locking surface includes:
a straight surface extending along a surface of the wall and positioned in a tip part of the claw portion in a side view of the locking claw; and
a reverse tapered surface positioned nearer than the tip part to the support wall in the side view.
3. The waterproof component according to claim 1 , wherein
the claw portion includes:
an inclined surface on an insertion side of the claw portion to the attachment hole;
a locking surface on a side of the claw portion abutting on the second periphery of the attachment hole; and
a cut surface connecting the inclined surface and the locking surface.
4. The waterproof component according to claim 1 , wherein
the support wall has a position restricting hole, and
the protection protrusion extends into the position restricting hole with the mat seal cover locked to the cover locking portion.
5. The waterproof component according to claim 4 , wherein the protection protrusion protrudes outward from the outer surface of the support wall with the mat seal cover locked to the cover locking portion and the protection protrusion arranged in the attachment hole.