Patent ID: 9463558
Filing Date: 2016-10-11
CPC Classification: B25B

Claim Text:
1. A hand tool having: a tool shaft having a working segment having a square outer cross section; and an engaging recess formed in the working segment; an engagement unit recess recessed in the working segment; and an engagement unit mounted in the engagement unit recess and protruding from the engagement unit recess; an inner sliding sleeve slidably mounted around the working segment, selectively positioned relative to the working segment, and having a square inner cross section that matches the outer cross section of the working segment; an engaging hole formed through the inner sliding sleeve and selectively aligned with the engaging recess; and an engaging ball moveably mounted in the engaging hole; and four slits longitudinally recessed in an inner wall of the inner sliding sleeve and respectively located at four sides of the inner wall of the inner sliding sleeve; an engagement module mounted around the inner sliding sleeve and having a first ring mounted around the inner sliding sleeve; and a second ring mounted around the inner sliding sleeve; and a spring mounted around the inner sliding sleeve and abutting the first ring; and an outer sliding sleeve slidably mounted around the inner sliding sleeve and having an inner wall formed inside the outer sliding sleeve; an abutting block annularly formed on the inner wall of the outer sliding sleeve; a pressing surface formed on a side of the abutting block facing the inner sliding sleeve, and selectively pressing the engaging ball; and a stopping surface formed in an end of the abutting block and abutting an end of the spring at a position opposite to the first ring; and an abutting surface formed in another end of the abutting block at a position opposite to the stopping surface and selectively abutting the second ring.