Handheld power tool and impact block return device thereof
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United States of America Patent
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Jan 16, 2018
Issued Date -
N/A
app pub date -
May 28, 2015
filing date -
Jun 5, 2014
priority date (Note) -
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Abstract
The present invention provides a handheld power tool having an impact block and an impact block return device. The impact block has a plurality of continuous teeth arranged along a lengthwise direction of the impact block. The impact block return device comprises a gearwheel engaged with the teeth of the impact block; a ratchet wheel rotating simultaneously with the gearwheel; and a clamping member operated in a first state and a second state, the clamping member contacting the ratchet wheel in the first state and the clamping member being separated from the ratchet wheel in the second state; wherein the impact block only can do a single-directional movement when the clamping member contacts the ratchet wheel in the first state. The present invention can improve stability of the retraction process of the impact block (e.g., a firing pin).
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