Abstract: The present invention provides a tensioning mechanism, which is installed in a portable packaging machine, the tensioning mechanism is provided with a rotation direction control and rotation angle keeping mechanism, a non-return mechanism and a rocker arm, the rotation direction control and rotation angle keeping mechanism being connected to the non-return mechanism and the rocker arm, and the rocker arm being provided with a toothed structure matching the tensioning wheel. The present invention is compact in structure, and is capable of realizing the handleless operation of the portable packaging machine from a tensioned state to a non-tensioned state without operating a handle.

Abstract: A fusion welding device, comprising an operating component, a fusion welding work motor, a fusion welding work moving assembly, and a fusion welding work fixed assembly, the fusion welding work motor being connected with the fusion welding work moving assembly by means of a transmission mechanism. The fusion welding device is provided with a central connection component that is able to rotate, and the central connection component is provided with a first input position, a second input position, and a locking structure connection position. The present fusion welding device is able to accomplish automatic band pressing and fusion welding work by means of a relatively simple structure and by means of differently transmitted front and back connections and changes in engagement.

Abstract: A fusion welding device, comprising a fusion welding work motor, a fusion welding work moving assembly, and a fusion welding work fixed assembly, the fusion welding work motor being connected to the fusion welding work moving assembly by means of a transmission mechanism. The fusion welding device is provided with a central connection component that is able to rotate, and the central connection component is provided with a first input position, a second input position, and a locking structure connection position. The present fusion welding device is able to implement automatic band pressing and fusion welding work by means of relatively simple structural cooperation, and by means of differently transmitted front and back connections and changes in engagement, and is able to automatically lift the fusion welding work moving assembly without requiring a handle or related operations.

Abstract: A handheld electric packing machine having a strap press structure, vibrating component, cutter, and strap press spacer matching the strap press structure. The strap press structure connects to the vibrating component or is part of the vibrating component. The vibrating component is a swing vibrating component capable of rising and falling. The machine has a downward pressing mechanism and rising reset mechanism for the vibrating component. The vibrating component swings leftward and rightward relative to the lengthwise direction of a packing strap. The machine has a leftward and rightward swing driving device for the vibrating component. The machine has a manually downward pressing operating mechanism with a lock, which is locked when the vibrating component is pressed downwards until the strap press structure is located at a strap press position. The downward pressing operating mechanism cannot retreat after the manually downward pressing is removed.

Abstract: A handheld electric packing machine having a strap press structure, vibrating component, cutter, and strap press spacer matching the strap press structure. The strap press structure connects to the vibrating component or is part of the vibrating component. The vibrating component is a swing vibrating component capable of rising and falling. The machine has a downward pressing mechanism and rising reset mechanism for the vibrating component. The vibrating component swings leftward and rightward relative to the lengthwise direction of a packing strap. The machine has a leftward and rightward swing driving device for the vibrating component. The machine has a manually downward pressing operating mechanism with a lock, which is locked when the vibrating component is pressed downwards until die strap press structure is located at a strap press position. The downward pressing operating mechanism cannot retreat after the manually downward pressing is removed.