Magnetic Driving Device
AssigneeMeng Rui Co., Ltd.
InventorChing-Hui Tsai
Life of this patent
Estimating the term…
Abstract
A driving device includes a driving shank, a magnetic member mounted in the driving shank, a stop ring secured in the driving shank to stop the magnetic member, and an elastic member biased between the driving shank and the magnetic member. The driving shank has a first end provided with a mounting post and a second end formed with a mounting hole and a receiving chamber. The stop ring has an inner wall formed with a through hole and an outer wall provided with a toothed portion engaging a peripheral wall of the receiving chamber. The magnetic member has a peripheral wall formed with a stop flange that is movable to abut the stop ring. Thus, the elastic member provides a buffering effect to the magnetic member to reduce the pressure applied on the magnetic member.
Claims3
A driving device, comprising:
- a driving shank;
- a magnetic member movably mounted in the driving shank;
- a stop ring secured in the driving shank to stop the magnetic member;
- and
- an elastic member mounted in the driving shank and biased between the driving shank and the magnetic member to push the magnetic member toward the stop ring;
- wherein the driving shank has a first end provided with a non-circular mounting post and a second end formed with a non-circular mounting hole and a receiving chamber connected to the mounting hole;
- the receiving chamber of the driving shank has a size smaller than that of the mounting hole of the driving shank;
- the stop ring is secured in the receiving chamber of the driving shank and has an inner wall formed with a through hole and an outer wall provided with a toothed portion engaging a peripheral wall of the receiving chamber of the driving shank;
- the toothed portion of the stop ring has a size greater than that of the receiving chamber of the driving shank so that the toothed portion of the stop ring is forcibly fitted into the peripheral wall of the receiving chamber of the driving shank;
- the magnetic member is movably mounted in the receiving chamber of the driving shank and has a first end formed with a receiving space connected to the receiving chamber of the driving shank and a second end provided with a magnetic portion extended into the mounting hole of the driving shank;
- the magnetic member has a peripheral wall formed with a stepped stop flange that is movable to abut the stop ring;
- the stop flange of the magnetic member has a size greater than that of the through hole of the stop ring;
- the stop flange of the magnetic member is movably mounted in the receiving chamber of the driving shank and is limited between the stop ring and the receiving chamber of the driving shank;
- the elastic member is partially received in the receiving chamber of the driving shank and partially received in the receiving space of the magnetic member.
Dependencies are inferred from the claim text.