Double-fulcrum torque wrench

A double-fulcrum torque wrench comprising:

• a tubular body;
• a head section for fitting with a socket or a screwing member;
• and
• a flexible mechanism including a flexible section, the flexible mechanism being connected with a rear end of the head section and disposed in the tubular body, the head section protruding from a front end of the tubular body, whereby when a wrenching force is applied to the wrench, the flexible section of the flexible mechanism is flexible;
• said torque wrench being characterized in that the head section and the flexible mechanism are connected with the tubular body via two fulcrums and the flexible section is positioned between the two fulcrums;
• wherein the flexible mechanism includes a flexible bar, a push block, a resilient member and a slide block, the flexible bar being fitted in the tubular body, a front end of the flexible bar being connected with the rear end of the head section;
• the flexible bar and the head section being together connected with the tubular body by inserting an insertion pin thereof, the insertion pin serving as a front fulcrum, whereby the flexible bar and the head section can together swing about the insertion pin;
• the push block, resilient member and slide block being sequentially mounted in the tubular body from front end to rear end;
• the front end of the push block and the rear end of the flexible bar substantially contacting with each other;
• two ends of the resilient member respectively abutting against the slide block and the push block;
• an adjustment mechanism being installed in the rear end of the tubular body and connected with the rear end of the slide block, a handle being rotatably fitted around the rear end of the tubular body and connected with the adjustment mechanism;
• whereby when rotating the handle, the adjustment mechanism drives the slide block to move along the axis of the tubular body for adjusting the resilient energy of the resilient member abutting against the push block;
• the flexible section being positioned between the flexible bar and the push block;
• the tubular body and the rear end of the flexible mechanism being connected via a rear fulcrum, the flexible section being positioned between the two fulcrums.

A double-fulcrum torque wrench comprising:

• a tubular body;
• a head section for fitting with a socket or a screwing member;
• and
• a flexible mechanism including a flexible section, the flexible mechanism being connected with a rear end of the head section and disposed in the tubular body, the head section protruding from a front end of the tubular body, whereby when a wrenching force is applied to the wrench, the flexible section of the flexible mechanism is flexible;
• said torque wrench being characterized in that the head section and the flexible mechanism are connected with the tubular body via two fulcrums and the flexible section is positioned between the two fulcrums;
• wherein the flexible mechanism includes a flexible bar serving as the flexible section, a front end and a rear end of the flexible bar being respectively connected with the tubular body via the two fulcrums;
• wherein two support pins are respectively disposed on two sides of the rear end of the flexible bar, the support pins abutting against inner wall of the tubular body to serve as a fulcrum.