Plastic grommet

• US 5,211,519 A
• Filed: 03/03/1992
• Issued: 05/18/1993
• Est. Priority Date: 03/11/1991
• Status: Expired due to Term

• Current Assignee: Nifco Incorporated
• Original Assignee: Nifco Incorporated
• Inventors: Saito, Kazuo
• Primary Examiner(s): Lindsey, Rodney M.
• Application Number:
  US07/845,043
• Time in Patent Office: 441 Days
• Field of Search: 411/40, 411/41, 411/45, 411/48, 411/15, 411/60, 411/57, 411/508
• US Class Current: 411/45
• CPC Class Codes: F16B 19/1081 fastened by a drive-pin F16B19/109 takes precedence
• CPC Class Codes: F16B 5/0642 the plates being arranged one on top of the other and in full close contact with each other

Abstract

The present invention relates to a pin-type grommet made of synthetic resin. It relates to an improvement of a grommet in which elastic stoppers of a female member are pressed outwardly by press fitting an insertion pin so that the collar and the elastic stoppers of the female member securely hold a plate member, and in which the plate member securely held by the female member is released by screwing out a pin type male member inserted in the female member. More specifically, the present invention relates to a grommet made of synthetic resin in which the male member to be inserted in the female member is provided on its leg with dents which receive the catches of the elastic stoppers, inclined portions which extend upwardly from the dents toward the peripheral surface of the leg, and a portion with larger diameter which presses the elastic stoppers outwardly, the portion with larger diameter being circular in horizontal cross section, and having flat surfaces each with an arcuate side and facing the head of the male member thereby constituting engagement faces for the catches of the female member.

Claims

1. A grommet comprising a female member made of synthetic resin which includes a cylindrical body having a top with a collar that extends outwardly, plural slits extending from a lower end of the cylindrical body toward the collar, plural elastic stoppers defined by said slits and a catch provided at a lower end of said elastic stoppers and facing inwardly, and

a male member made of synthetic resin which includes a head, a leg extending integrally from the head, sectioned dents provided in said leg into which each said catch of the elastic stoppers is adapted to be engaged and an inclined portion that extends outwardly from each said dent toward the head and to a peripheral surface of the leg,

the grommet being characterized in that the leg has an enlarged diameter portion located above the inclined portions which is a circle in section and is provided with lateral engagement faces opposing said head and each having an arcuate outer edge formed by a peripheral surface of the enlarged diameter portion and a linear inner edge formed by a flat surface of the larger diameter portion which is parallel to an axial center line of said leg, whereby the catches on the elastic stoppers of the female member are deflected outwardly by the inclined portions of the male member when the male and female member are assembled and are held stopped by said engagement faces.

2. A grommet comprising a female member made of synthetic resin which includes a cylindrical body having a top with a collar that extends outwardly, four slits extending from a lower end of the cylindrical body toward the collar, four elastic stoppers defined by said slits and a catch provided at a lower end of each of said elastic stoppers and facing inwardly, and

a male member made of synthetic resin which includes a head, a leg extending integrally from the head, four sectioned dents provided in the leg into which each said catch of the elastic stoppers become engaged and an inclined portion that extends from each of said four dents outwardly toward the head to a peripheral surface of the leg,

the grommet being characterized in that the leg has an enlarged diameter portion located above the inclined portions which is a circle in section and is provided with lateral engagement faces opposing said head and each having an arcuate outer edge formed by a peripheral surface of the enlarged diameter portion and a linear inner edge formed by a flat surface of the larger diameter portion which is parallel to an axial center line of said leg, the engagement faces being circumferentially spaced at regular intervals whereby the catches on the elastic stoppers of the female member are deflected outwardly by the inclined portions of the male member when the male and female members are assembled and are held stopped by said engagement faces.