Grommet

Patent metadata

Field	Value
Publication number	US-2016169279-A1
Application number	US-201514961012-A
Country	US
Kind code	A1
Filing date	Dec 7, 2015
Priority date	Dec 10, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

When an attachment circular-cylinder section coupled to one axial line direction end portion of a mainbody circular-cylinder section of a grommet is inserted into an opening portion in an upper frame, engagement claws formed at an outer periphery of the attachment circular-cylinder section engage with a peripheral edge portion of the opening portion by elastically deforming, enabling the grommet to be attached to the upper frame. When a seatback spring is passed through the grommet, a retaining section formed at an inner peripheral portion of a boundary between the mainbody circular-cylinder section and the attachment circular-cylinder section retains the seatback spring. An internal-diameter of the retaining section is smaller than internal-diameters of the mainbody circular-cylinder section and the attachment circular-cylinder section, and both inner peripheral faces of the mainbody circular-cylinder section and the attachment circular-cylinder section have cone shape with a decreasing diameter on progression toward the retaining section.

First claim

What is claimed is:

1 . A grommet comprising:
a main body circular cylinder section through which a line-shaped member is capable of being passed; an attachment circular cylinder section that is coupled to one end portion, in an axial line direction, of the main body circular cylinder section, and that is capable of being inserted into an opening portion formed at an attached-to member; an engagement portion that is formed at an outer peripheral portion of the attachment circular cylinder section, and that is capable of engaging with a peripheral edge portion of the opening portion by elastically deforming; and a retaining section that is formed at an inner peripheral portion of a boundary between the main body circular cylinder section and the attachment circular cylinder section, that is capable of retaining the line-shaped member, and that has a smaller internal diameter than an internal diameter of the main body circular cylinder section and an internal diameter of the attachment circular cylinder section; wherein at least one of an inner peripheral face of the main body circular cylinder section or an inner peripheral face of the attachment circular cylinder section has a cone shape with a decreasing diameter on progression toward the retaining section.

2 . The grommet of claim 1 , wherein both the inner peripheral face of the main body circular cylinder section and the inner peripheral face of the attachment circular cylinder section have a cone shape with the decreasing diameter on progression toward the retaining section.

3 . The grommet of claim 1 , further comprising a plurality of protrusion portions that are formed projecting out from the retaining section at intervals therebetween in a peripheral direction of the retaining section, and that extend along the axial line direction.

4 . The grommet of claim 2 , further comprising a plurality of protrusion portions that are formed projecting out from the retaining section at intervals therebetween in a peripheral direction of the retaining section, and that extend along the axial line direction.

5 . The grommet of claim 1 , wherein a length of the main body circular cylinder section in the axial line direction is longer than a length of the attachment circular cylinder section in the axial line direction.

6 . The grommet of claim 2 , wherein a length of the main body circular cylinder section in the axial line direction is longer than a length of the attachment circular cylinder section in the axial line direction.

7 . The grommet of claim 4 , wherein a length of the main body circular cylinder section in the axial line direction is longer than a length of the attachment circular cylinder section in the axial line direction.

8 . The grommet of claim 1 , further comprising a contact portion that is formed at the outer peripheral portion of the attachment circular cylinder section, and that contacts an inner peripheral wall of the opening portion.

9 . The grommet of claim 2 , further comprising a contact portion that is formed at the outer peripheral portion of the attachment circular cylinder section, and that contacts an inner peripheral wall of the opening portion.

10 . The grommet of claim 4 , further comprising a contact portion that is formed at the outer peripheral portion of the attachment circular cylinder section, and that contacts an inner peripheral wall of the opening portion.

11 . The grommet of claim 7 , further comprising a contact portion that is formed at the outer peripheral portion of the attachment circular cylinder section, and that contacts an inner peripheral wall of the opening portion.

Assignees

• Toyota Boshoku Kk
• Nifco Inc

Inventors

• Okamoto Daisuke
• Hori Hirofumi
• Arashi Masato
• Okada Naoya

Classifications

• F16C29/02 Primary

  Sliding-contact bearings · CPC title

• B60N2/66 Primary

  Lumbar supports · CPC title

• B60N2/72

  Attachment or adjustment thereof · CPC title

• F16L3/08 Primary

  substantially surrounding the pipe, cable or protective tubing · CPC title