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Screw driver

A driver, screw technology, used in screwdrivers, power tools, wrenches, etc., to solve problems such as degradation, inability to prevent end tool rotation, etc.

Active Publication Date: 2011-05-25
KOKI HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to long-term use, degradation occurs in the O-ring, and as a result, the O-ring does not prevent the end tool from rotating with the forward rotation of the motor despite the clutch mechanism being switched off

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0025] will refer to Figure 1-13 A screw driver according to one embodiment of the present invention is described. Such as figure 1 As shown, the screw driver 1 includes a housing 2 , a motor 3 , a clutch portion 4 , an end tool mounting portion 5 , and a spring clutch mechanism 6 . The end tool 10 is detachably attached to the end tool mounting portion 5 .

[0026] The housing 2 serves as an external frame, and has a tail provided with a handle 21 serving as a gripping portion. In the following description, the end tool side is referred to as the front side, and the handle side is referred to as the rear side. The handle 21 is provided with an activation device 21A and a switch 21D. The starter 21A is adapted to perform drive control of the motor 3, and the switch 21D is adapted to change the rotation direction of the motor 3 between forward (forward) and reverse. A power cord 21B extends from the handle 21 . The power line 21B is electrically connected to an external ...

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PUM

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Abstract

A screw driver capable of avoiding co-rotation of an end bit and a motor in case of sharp shooting the end bit with a groove in a head of a screw is disclosed. A co-rotation preventing mechanism is engageable with an end bit mounting portion when the end bit mounting portion is at a frontward position to prevent the end bit mounting portion from being rotated in the forward direction and to allowthe end bit mounting portion to rotate in the reverse direction. The preventing mechanism is disengageable from the end bit mounting portion when the end bit mounting portion is at the rearward position to allow the end bit mounting portion to rotate in both forward and reverse directions.

Description

technical field [0001] The present invention relates to a screw driver, and more particularly, to such a screw driver having a clutch mechanism and a co-rotation preventing structure. Background technique [0002] Screw drivers are used to drive screws to fasten board-like components such as wall paper boards to ceilings or walls. Japanese Patent Application Laid-Open No. H5-318331 discloses a screw driver having a drive assembly including an electric motor, a driven assembly having a tip tool (bit) mounting portion, and an actuator that executes a process from the drive assembly to the driven assembly. Components of the clutch mechanism for frictional power transmission. When the clutch mechanism is OFF, power transmission to the tip tool is not performed, no friction is generated, and when the clutch mechanism is ON, power transmission to the tip tool is performed using frictional force. [0003] According to the power tool disclosed in this Japanese Laid-Open Document, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B21/00B25B23/157
Inventor 佐藤慎一郎山田英贵铃裹司
Owner KOKI HLDG CO LTD