Abstract: An improved electric screwdriver switch, wherein the switch is installed in a push-down type electric screwdriver, the lower end of the electric screwdriver is provided with a screwdriver head, and its inside is provided with a thimble; the switch includes a structure base with an inner slot and a micro-switch with a touch rod; the inner slot is provided with a L-rod and a spring, and the micro-switch is electrically connected to the motor of the electric screwdriver; when the electric screwdriver presses down the screwdriver head, the inner thimble is linked, and the upper end of the thimble touches the lower end of the L-rod; the touch distance of the upper end of the L-rod and the touch rod on the micro-switch can determine that the motor drives the start/stop of the screwdriver head; the improved structure base is designed as a whole, it features the strong structure and high precision, it is not easy to loose after installation.

Abstract: An electric screwdriver connecting shaft that includes: an upper connecting shaft, a two-stage shaft hole with two different shapes in a shaft; and a lower connecting shaft, a two-stage shaft surface with two different shapes in a shaft; with the shaft corresponding to the upper connecting shaft and the lower connecting shaft, the hole is designed to the shaft hole coordinated with the two-stage shaft surface to achieve a guiding effect when combined, and to achieve better concentricity when connecting. It can also provide a more stable connecting effect to reduce the lock error and achieve good screw lock quality, and further prolong the service life of the connecting shaft.

Abstract: An improved electric screwdriver switch, wherein the switch is installed in a push-down type electric screwdriver, the lower end of the electric screwdriver is provided with a screwdriver head, and its inside is provided with a thimble; the switch includes a structure base with an inner slot and a micro-switch with a touch rod; the inner slot is provided with a L-rod and a spring, and the micro-switch is electrically connected to the motor of the electric screwdriver; when the electric screwdriver presses down the screwdriver head, the inner thimble is linked, and the upper end of the thimble touches the lower end of the L-rod; the touch distance of the upper end of the L-rod and the touch rod on the micro-switch can determine that the motor drives the start/stop of the screwdriver head; the improved structure base is designed as a whole, it features the strong structure and high precision, it is not easy to loose after installation.

Abstract: An electric screwdriver connecting shaft that includes: an upper connecting shaft, a two-stage shaft hole with two different shapes in a shaft; and a lower connecting shaft, a two-stage shaft surface with two different shapes in a shaft; with the shaft corresponding to the upper connecting shaft and the lower connecting shaft, the hole is designed to the shaft hole coordinated with the two-stage shaft surface to achieve a guiding effect when combined, and to achieve better concentricity when connecting. It can also provide a more stable connecting effect to reduce the lock error and achieve good screw lock quality, and further prolong the service life of the connecting shaft.

Abstract: An electric screwdriver includes a housing, a power output end, and a control cylinder mounting therein an active shaft connecting thereto a following shaft connecting thereto a driver mounting piece axially slidably mounted in a cap cylinder and a torsion-adjusting cylinder wherein the mounting piece has an engaging end attaching thereto a flange attaching thereon a light-shielding piece capable of shielding the light emitted by a photic control switch mounted on the control cylinder to allow the motor in the housing to be energized when the mounting piece mounts thereon a driver urging against a screw.

Abstract: Structural improvement of electric screwdriver with respect to the torsion adjustment thereof, incorporating a torsion mechanism having outer threads in the anterior shell in coordination with a hollow-set torsion adjustment lid having correspondingly provided inner threads, so that manually imposed rotative feeding of the adjustment lid may force the supporting stem to exert depression on the depression spring through the adjustment disk, resulting in vertical engagement of both the upper and the lower ratchet, also in mortise joint of the torsion stem with the lower ratchet; that activation of a finely-touched switch starts the motor to acquire an increased torque by virtue of the main gear in relation to the vernier gear, eventually setting the torsion stem to rotation while locking the screw or else releasing the same, the torsion adjustment lid permissive of multiple-shifted helic adjustments with precision and convenience. The motor being smooth in running, thereby shortens time and labor in work.