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Bushing for use between a control knob and a housing

  • US 4,495,547 A
  • Filed: 04/06/1982
  • Issued: 01/22/1985
  • Est. Priority Date: 04/06/1982
  • Status: Expired due to Fees
First Claim
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1. In a system including a device having a movable control arm, a printed circuit board, and a panel disposed adjacent said board, said device being mounted on said printed circuit board so that the control arm extends through an opening in said panel, and wherein a knob is mounted on the distal portion of said arm, the improvement comprising a bushing having a barrel portion and a flange portion through both of which extends a passage for closely receiving said control arm, where said barrel portion is dimensioned to fit in said panel opening and to be closely received thereby and where said flange portion is attached to one end of said barrel portion and has a transverse dimension larger than said opening, said bushing being mounted on said control arm between said panel and said knob, and where said knob is axially slideable toward said printed circuit board along said arm whereby, when an axial force is applied to said knob, said knob slides to a position wherein one axial face of said flange portion abuts said panel and the other axial face of said flange portion abuts said knob so that both axial and transverse loading applied to said knob are absorbed by said bushing and said panel rather than being transmitted to said printed circuit board via said control arm.

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