Patent ID: 7617568
Filing Date: 2009-11-17
Classification: E05F,E05Y,Y10T

Abstract:
1. A knuckle arm adapted to be connected to a machine body and a top cover of a machine, said knuckle arm comprising: a mounting seat including a mounting block adapted to be disposed fixedly on the machine body, and a first pivot block extending integrally from said mounting block and having a first cam edge; a connecting seat connected pivotally to said first pivot block of said mounting seat and adapted to be attached to the top cover; a sliding seat disposed slidably within said connecting seat and having an integral first projection; and a resilient member disposed between said mounting seat and said sliding seat and biasing said sliding seat to move toward said mounting seat so as to keep said first projection of said sliding seat in contact with said first cam edge of said mounting seat; wherein said mounting seat further includes a second pivot block extending integrally from said mounting block and having a second cam edge, and a mounting groove disposed between said first and second pivot blocks, said wing plates of said connecting seat being located respectively to two opposite sides of an assembly of said first and second pivot blocks of said mounting seat, said connecting seat being connected pivotally to said first and second pivot blocks of said mounting seat; wherein said knuckle arm further comprises a pivot rod extending through said wing plates of said connecting seat and first and second pivot blocks of said mounting seat; wherein said sliding seat includes a first wing block having said first projection, a second wing block having an integral second projection, a coupling block interconnecting said wing blocks fixedly, and mounting groove disposed between said first and second wing blocks.