| 摘要 |
An open end wrench includes a fixed jaw, the fixed jaw having a dovetail tongue and a U-groove extended along the width thereof, a sliding groove formed in the dovetail tongue, and a stop block with a pin disposed at one end of the U-groove, a movable jaw, the movable jaw having a dovetail groove coupled to the dovetail tongue, a stop rod perpendicularly inserted into the sliding groove and movable with the movable jaw along the sliding groove, and a stop block with a pin disposed at one end of the U-groove, and a spring member received in the U-grooves of the fixed jaw and movable jaw and supported with the two ends thereof on the pin at the stop block of the fixed jaw and the pin at the stop block of the movable jaw.
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