A control device of a cutting tool is revealed. For performing cutting, opening and closing, the cutting tool includes a pair of handles pivotally connected to each other and each handle having a blade. The control device is set on the handle and involved in opening or closing of the blades of the cutting tool. The control device includes a first component and a second component. The first and the second components are connected to and locked with each other tightly by a fastening structure. The control device is disposed on the handle closely, without loosening from the handle.

A device comprising: (a) a first working arm; (b) a shuttle located on the first working arm, and (c) a bias device; wherein the bias device biases the first working arm when the shuttle is in a first position, and wherein the bias device is free of biasing the first working arm when the shuttle is in a second position.

A device comprising: (a) a first working arm; (b) a shuttle located on the first working arm, and (c) a bias device; wherein the bias device biases the first working arm when the shuttle is in a first position, and wherein the bias device is free of biasing the first working arm when the shuttle is in a second position.

The present invention provides a pair of scissors comprising handle assembly and scissor head assembly. The handle assembly comprises a first handle and a second handle, and the scissor heads comprise a first scissor head and a second scissor head. The first scissor head is provided with a first blade extending from one end of the first handle. The second scissor head is provided with a second blade extending from one end of the second handle. The first scissor head and the second scissor head are pivotally hinged via a pivot structure, characterized in that, at the connection portion of the scissor head and the pivot structure, a width-thickness ratio of the first scissor head and the second scissor head is small. Such scissors enhances the rigidity of the scissor head greatly and improves the shearing strength of the scissors, facilitating snipping thicker objects to meet the requirements of being suited for various operation subjects.

The present invention provides a pair of scissors comprising handle assembly and scissor head assembly. The handle assembly comprises a first handle and a second handle, and the scissor heads comprise a first scissor head and a second scissor head. The first scissor head is provided with a first blade extending from one end of the first handle. The second scissor head is provided with a second blade extending from one end of the second handle. The first scissor head and the second scissor head are pivotally hinged via a pivot structure, characterized in that, at the connection portion of the scissor head and the pivot structure, a width-thickness ratio of the first scissor head and the second scissor head is small. Such scissors enhances the rigidity of the scissor head greatly and improves the shearing strength of the scissors, facilitating snipping thicker objects to meet the requirements of being suited for various operation subjects.

A cutting tool comprises a first handle, a second handle, a first cutting part comprising a first cutting blade and a first fastening section extending away from the first cutting blade, a second cutting part comprising a second cutting blade and a second fastening section extending away from the second cutting blade, and a biasing means configured to pre-tension the first cutting blade and the second cutting blade away from each other. The first cutting part and the second cutting part are pivotably coupled to each other at a pivot point. The first fastening section is inserted into the first handle, and the second fastening section is inserted into the second handle. The first handle is fixedly coupled with the first fastening section by the biasing means, and the second handle is fixedly coupled with the second fastening section by the biasing means.