US 12,420,385 B2 · Screwdriver

Abstract

A screwdriver allows a screwing operation and an unscrewing operation to be performed smoothly. A screwdriver includes a housing, a motor including a stator and a rotor, a spindle, a clutch assembly, and a spindle locking assembly. The spindle includes a rod to which a tip tool is attachable, and is supported by the housing in a manner movable between an advanced position and a retracted position in a front-rear direction. The spindle has a reception hole extending frontward from a rear end face of the spindle. The clutch assembly transmits a rotational force from the rotor to the spindle in response to the spindle moving to the retracted position during forward rotation of the rotor. The spindle locking assembly transmits a rotational force from the rotor to the spindle during reverse rotation of the rotor, and includes the reception hole, and a countershaft placed in the reception hole.

Claims20

Dependent claims

A screwdriver, comprising:

a housing;
a motor including a stator and a rotor rotatable relative to the stator;
a spindle including a rod to which a tip tool is attachable, the spindle being supported by the housing in a manner movable between an advanced position and a retracted position in a front-rear direction, the spindle having a reception hole extending frontward from a rear end face of the spindle;
a clutch assembly configured to transmit a rotational force from the rotor to the spindle in response to the spindle moving to the retracted position during forward rotation of the rotor;
and
a spindle locking assembly configured to transmit a rotational force from the rotor to the spindle during reverse rotation of the rotor, the spindle locking assembly including
the reception hole, and
a countershaft placed in the reception hole.

5 more elements

Dependencies are inferred from the claim text.

Screwdriver

Life of this patent

Screwdriver

Life of this patent

Abstract

Claims20