An electronic knife assembly and associated systems and methods are disclosed herein. In some embodiments, the knife includes a blade and a handle operably couplable to the blade. The handle can include an oscillator operably coupled to the blade, at least one sensor configured to obtain one or more measurements, and a controller operably coupled to the oscillator and the least one sensor. The measurements from the sensor can include a spatial position of the electronic knife, a spatial orientation of the electronic knife, a mass of a user's hand, a grip of the user's hand, and/or a resistance to the oscillation of the blade. The controller can adjust an operating frequency of the oscillator based at least partially on the one or more measurements from the at least one sensor. The handle can also include a wireless power supply.

An electronic knife assembly and associated systems and methods are disclosed herein. In some embodiments, the knife includes a blade and a handle operably couplable to the blade. The handle can include an oscillator operably coupled to the blade, at least one sensor configured to obtain one or more measurements, and a controller operably coupled to the oscillator and the least one sensor. The measurements from the sensor can include a spatial position of the electronic knife, a spatial orientation of the electronic knife, a mass of a user's hand, a grip of the user's hand, and/or a resistance to the oscillation of the blade. The controller can adjust an operating frequency of the oscillator based at least partially on the one or more measurements from the at least one sensor. The handle can also include a wireless power supply.

A pneumatic tool has a hollowed main body. One end of the main body is assembled with a pneumatic motor having a transmission shaft inserted into the main body. The other end of the main body is assembled with a connecting member being slidable along an axial direction of the main body. One end of the connecting member forms a connecting portion, and the other end of the connecting member forms a knife assembling portion. A driving gear is rotatably assembled in the main body and engaged with the transmission shaft. A protruding post is assembled on a portion of the driving gear biasing from an axis of the driving gear. A linking bar has a first end and a second end opposite to the first end. The first end is pin-jointed to the protruding post, and the second end is pin-jointed to the connecting portion of the connecting member.

A hand cutter comprising a housing, a blade assembly, an actuator assembly, a gear assembly and a retraction means with the gear assembly connecting the actuator assembly to the blade assembly in such a manner that a movement of said actuator slide is transmitted to said blade assembly via said gear assembly with a gear ratio of said gear assembly such that moving said actuator slide moves said blade assembly by a larger distance.

A hand cutter comprising a housing, a blade assembly, an actuator assembly, a gear assembly and a retraction means with the gear assembly connecting the actuator assembly to the blade assembly in such a manner that a movement of said actuator slide is transmitted to said blade assembly via said gear assembly with a gear ratio of said gear assembly such that moving said actuator slide moves said blade assembly by a larger distance.

A method and a hand-held device for dermaplaning is disclosed that includes a blade assembly which includes a blade, a blade holder and a safety cage. In accordance with an important aspect of the invention, the safety cage limits the amount of penetration of the blade into the facial skin to enable the device to be safely used by non-professionals. The dermaplaning device includes a vibration generator that causes the blade to vibrate at a predetermined frequency. Various embodiments of the hand-held dermaplaning device are disclosed for vibrating the blade.

A method and a hand-held device for dermaplaning is disclosed that includes a blade assembly which includes a blade, a blade holder and a safety cage. In accordance with an important aspect of the invention, the safety cage limits the amount of penetration of the blade into the facial skin to enable the device to be safely used by non-professionals. The dermaplaning device includes a vibration generator that causes the blade to vibrate at a predetermined frequency. Various embodiments of the hand-held dermaplaning device are disclosed for vibrating the blade.

A representative power tool has a spindle transmitting a motor driving force to a tool accessory, a tool accessory holding member movable between a holding position and a tool accessory releasing position, a lock mechanism movable between an engaging position for locking the tool accessory holding member in the holding position and a disengaging position for releasing the lock, an inner housing housed in a body housing and houses at least part of the lock mechanism, and an operation mechanism. The operation mechanism includes a handle part, a switching part that switches the lock mechanism between the engaging position and the disengaging position according to the handle part operation, and a switching connection part that is separated from the inner housing when the lock mechanism is placed in the engaging position and comes into contact with the inner housing when the lock mechanism is placed in the disengaging position.

A representative power tool has a spindle transmitting a motor driving force to a tool accessory, a tool accessory holding member movable between a holding position and a tool accessory releasing position, a lock mechanism movable between an engaging position for locking the tool accessory holding member in the holding position and a disengaging position for releasing the lock, an inner housing housed in a body housing and houses at least part of the lock mechanism, and an operation mechanism. The operation mechanism includes a handle part, a switching part that switches the lock mechanism between the engaging position and the disengaging position according to the handle part operation, and a switching connection part that is separated from the inner housing when the lock mechanism is placed in the engaging position and comes into contact with the inner housing when the lock mechanism is placed in the disengaging position.

A hand cutter comprising a housing, a blade assembly, an actuator assembly, a gear assembly and a retraction means with the gear assembly connecting the actuator assembly to the blade assembly in such a manner that a movement of said actuator slide is transmitted to said blade assembly via said gear assembly with a gear ratio of said gear assembly such that moving said actuator slide moves said blade assembly by a larger distance.