Patent ID: 8955698
Filing Date: 2015-02-17
Classification: A47F,B25H

Abstract:
1. A tool retaining plate assembly for sleeving a sleeve in a rotary latch positioning state, the sleeve having an assembling end with a square slot defining four slot walls, the slot wall having a positioning flange extending to a depth from the slot wall, the tool retaining plate assembly comprising: a disc base having a holding surface and a mounting surface; a plurality of sleeving columns positioned in spaced relation to each other on said mounting surface, wherein each of said plurality of sleeving columns are of an octagonal columnar shape and define a column head end and a column foot and a circumferential portion, wherein four abutting surfaces and four locking surfaces are cross connected at said circumferential portion and an angular locking portion is formed between said abutting surface and said locking surface, said locking portion generating a cross-locking action during a rotation of the sleeve; a plurality of positioning bulges protruding externally of a pair of the opposite abutting surfaces opposite to the positioning flanges of the sleeve, said plurality of positioning bulges suitable for engaging with the positioning flanges so as to cause a latch positioning state of the sleeve; and a pair of locking portions diagonally positioned adjacent to the abutting surface, said plurality of positioning bulges positioned toward the abutting surface, wherein a crossing space is formed between the slot wall of the sleeve and the pair of locking portions when the square slot of the sleeve is positioned outside the positioning column.