Bent wrench having torque measurement function

A bent wrench includes a wrench body including a handle formed with a bent portion, and at least one strain gauge mounted on a connection of the handle and the bent portion to measure the torque of the wrench body. Thus, the strain gauge is extended through the connection of the bent portion and the two ends of the handle and can measure the torque of the wrench body in the optimum manner due to the smallest structural strength of the connection of the bent portion and the two ends of the handle, so that the strain gauge can measure the torque of the wrench body exactly and optimally.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a bent wrench, and more particularly to a bent wrench having a torque measurement function.

2. Description of the Related Art

A conventional wrench comprises a handle formed with a receiving space, and a strain gauge mounted in the receiving space of the handle to measure the torque value of the conventional wrench. However, the handle of the conventional wrench has an enhanced strength, so that the strain gauge mounted in the receiving space of the handle cannot measure the torque value of the conventional wrench easily and exactly. In addition, the strain gauge is hidden in the receiving space of the handle, thereby causing inconvenience to the user in replacement and maintenance of the strain gauge.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a bent wrench having an exact torque measurement function.

Another objective of the present invention is to provide a bent wrench, wherein the strain gauge is extended through the connection of the bent portion and the two ends of the handle and can measure the torque of the wrench body in the optimum manner due to the smallest structural strength of the connection of the bent portion and the two ends of the handle, so that the strain gauge can measure the torque of the wrench body exactly and optimally.

A further objective of the present invention is to provide a bent wrench, wherein the strain gauge and the indication device are bonded on the handle, thereby facilitating replacement and maintenance of the strain gauge and the indication device.

In accordance with the present invention, there is provided a bent wrench, comprising:

a wrench body including a handle formed with a bent portion; and

at least one strain gauge mounted on a connection of the handle and the bent portion to measure the torque of the wrench body.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially toFIGS. 1-3, a bent wrench in accordance with the preferred embodiment of the present invention comprises a wrench body10including a handle11having two ends each provided with a mounting portion12and having a mediate section formed with a bent portion13located between the two ends of the handle11. Preferably, the bent portion13is distorted in a vertical manner, so that the two ends of the handle11are vertical to each other.

The bent wrench further comprises at least one strain gauge14mounted on the handle11and located adjacent to the bent portion13. Preferably, the bent wrench comprises two strain gauges14mounted on two sides of the handle11. Preferably, the strain gauge14is extended through the connection of the bent portion13and the two ends of the handle11.

The strain gauge14has a distal end provided with an indication device15. Thus, the indication device15of the strain gauge14can indicate the torque values measured by the strain gauge14in a digital manner. The resistance value measured by the strain gauge14is converted into a digital signal, and operation of the strain gauge14and the indication device15is conventional and will not be further described in detail.

Accordingly, the connection of the bent portion13and the two ends of the handle11has the smallest structural strength. Thus, as shown inFIG. 4, when the user's one hand holds the bent portion13of the wrench body10to rotate the handle11to drive a workpiece20, such as a nut or the like, the strain gauge14that is extended through the connection of the bent portion13and the two ends of the handle11can measure the torque of the wrench body10in the optimum manner due to the smallest structural strength of the connection of the bent portion13and the two ends of the handle11, so that the strain gauge14can measure the torque of the wrench body10exactly and optimally. Then, the indication device15of the strain gauge14can indicate the torque values measured by the strain gauge14in a digital manner.

In addition, the strain gauge14and the indication device15are bonded on the handle11, thereby facilitating replacement and maintenance of the strain gauge14and the indication device15.

Referring toFIG. 5, the strain gauge14is mounted on a narrower portion of the handle11.