US 12,240,138 B2
Hand tool with replaceable workpiece head
Yepeng Cai, Guangdong (CN)
Appl. No. 18/833,400
Filed by Yepeng Cai, Guangdong (CN)
PCT Filed Sep. 25, 2023, PCT No. PCT/CN2023/121048
§ 371(c)(1), (2) Date Jul. 26, 2024,
PCT Pub. No. WO2024/198275, PCT Pub. Date Oct. 3, 2024.
Claims priority of application No. 202320719615.4 (CN), filed on Mar. 31, 2023.
Prior Publication US 2024/0416537 A1, Dec. 19, 2024
Int. Cl. B26B 5/00 (2006.01); A47G 21/02 (2006.01); A47G 21/04 (2006.01); A47G 21/06 (2006.01); B26B 11/00 (2006.01)
CPC B26B 5/00 (2013.01) [A47G 21/02 (2013.01); A47G 21/04 (2013.01); A47G 21/06 (2013.01); B26B 11/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A hand tool with a replaceable workpiece head, comprising a handle and the workpiece head detachably connected to a front end of the handle, wherein a rear end of the workpiece head is provided with an insertion block, a front end surface of the handle is provided with an insertion hole, the insertion block of the workpiece head is inserted into the insertion hole, a side wall of the handle is provided with a receiving slot, the receiving slot is communicated with the insertion hole, a rear end of the insertion block is provided with a locking part, and the receiving slot is provided with a movable locking member and a pushing mechanism, and the pushing mechanism is capable of pushing the movable locking member such that the movable locking member and the locking part are engaged with each other,
the locking part is a protruding block located at the rear end of the insertion block, and the movable locking member includes an elastic arm located in the receiving slot, a rear end of the elastic arm is fixed on an inner side of the receiving slot, a front end of the elastic arm is a free end, the free end of the elastic arm is provided with a locking groove, the locking groove is driven by the elastic arm to be separated from the protruding block when the elastic arm is in a natural state, and the pushing mechanism is capable of pushing the elastic arm to drive the locking groove to be engaged with the protruding block,
the pushing mechanism comprises a swing rod and a protrusion provided at an edge of a front end of the swing rod, the front end of the swing rod is connected into the receiving slot through a rotating shaft, the swing rod is capable of rotating around the rotating shaft to be unfolded from and folded in the receiving slot; when the swing rod is rotated to a folded state, the elastic arm is pressed by the protrusion such that the locking groove is engaged with the protruding block; when the swing rod is rotated to an unfolded state, the protrusion is misaligned with the elastic arm such that the locking groove is separated from the protruding block.