Garden shears

Garden shears includes two corresponding cutting members, two opposing applying arms and two assembling members. Each cutting member has a main pivot aperture at a middle section thereof, a blade portion above the main pivot aperture, a pushing arc and a sliding arc continuously disposed below the main pivot aperture and a protrusion disposed between the pushing arc and the sliding arc, and an adjustable slot at a lower section. Each applying arm has a driving pivot aperture at a middle section, an eccentric pivot aperture at a top section, a rotation portion corresponding to the sliding arc formed at a top edge, a pushing edge formed at a side of the rotation portion, an indentation formed between the rotation portion and the pushing edge, and a handle at a lower section; wherein the assembling member is a flat member and has at least one securing aperture.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to garden shears, and more particularly to garden shears requiring less operating strength.

2. Description of the Related Art

Gardening has become a popular hobby for many people; it can help to reduce stress and improve the environmental atmosphere. Therefore, gardening tools are necessary for maintenance. Most typical garden shears, as shown inFIG. 8, comprise two cutting members50and a shaft pin60. The two cutting members50are crossover assembled and pivoted by the shaft pin60. A blade portion51is disposed at one end of each cutting member50, and a handle62is disposed at another end of each cutting member50. Users can hold the handles62to operate the blade portions51for cutting movements. However, users usually need to apply great strength to operate the garden shears.

Therefore, it is desirable to provide garden shears to mitigate and/or obviate the aforementioned problems.

SUMMARY OF THE INVENTION

An objective of the present invention is to provide garden shears requiring less strength to operate.

In order to achieve the above-mentioned objective, garden shears of the embodiment of the present invention comprise two corresponding cutting members, two opposing applying arms and two assembling members. Each cutting member has a main pivot aperture at a middle section thereof, a blade portion above the main pivot aperture, a pushing arc and a sliding arc continuously disposed below the main pivot aperture and a protrusion disposed between the pushing arc and the sliding arc, and an adjustable slot at a lower section. Each applying arm has a driving pivot aperture at a middle section, an eccentric pivot aperture at a top section, a rotation portion corresponding to the sliding arc formed at a top edge, a pushing edge formed at a side of the rotation portion, an indentation formed between the rotation portion and the pushing edge, and a handle at a lower section. The assembling member is a flat member and has at least one securing aperture.

With the above-mentioned structure, the following benefits can be obtained: when a user presses the handles of the applying arms together, the cutting members are driven to close together to perform a cutting movement, such that the pushing edge of the applying arm generates a rotatable pushing force on the pushing arc. Furthermore, when the blade portion is cutting into the target object, and the interaction between the blade portion and the target object increases, which requires a stronger application force, the driving pivot aperture moves downwardly in the adjustable slot to increase the torque for the blade portion.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Please refer toFIG. 1andFIG. 2. Garden shears of an embodiment of the present invention comprise two corresponding cutting members10,100, two opposing applying arms20,200and two assembling members30,300, which are assembled with corresponding securing members40. Each cutting member10,100has a main pivot aperture11at a middle section thereof, a blade portion12above the main pivot aperture11, a pushing arc13and a sliding arc14continuously disposed below the main pivot aperture11and a protrusion15is disposed between the pushing arc13and the sliding arc14. An adjustable slot16is disposed at a lower section. Each applying arm20,200has a driving pivot aperture21at a middle section, an eccentric pivot aperture22at a top section, a rotation portion23corresponding to the sliding arc14formed at a top edge, a pushing edge24formed at a side of the rotation portion23, an indentation25formed between the rotation portion23and the pushing edge24, and a handle26at a lower section. The assembling member30is a flat member and has two securing apertures31,32.

For structural assembly, please referFIG. 3together withFIG. 2. The two cutting members10,100overlap each other. The two assembling members30,300are respectively disposed on the two outside surfaces of the two overlapped cutting members10,100. The main pivot aperture11and the securing aperture31are aligned and locked together with the securing member40, such that the rotation portion23of the applying arm20and the sliding arc14of the cutting member10contact each other, and the driving pivot aperture21of the applying arm20is locked with the securing member40and slidably installed in the adjustable slot16of the cutting member100. The securing member40utilizes a circular column27disposed in the adjustable slot16. Similarly, the rotation portion23of the applying arm200and the sliding arc14of the cutting member100contact each other, and the driving pivot aperture21of the applying arm200is locked with the securing member40and slidably installed in the adjustable slot16of the cutting member100. The securing member40utilizes a circular column27disposed in the adjustable slot16. The eccentric pivot aperture22of the applying arm20,200and the securing aperture32of the assembling member30,300are aligned with each other and locked with the securing member40.

When the cutting members10,100and the applying arms20,200are closed together, the blade portions12face each other, and the rotation portions23of the applying arms20,200tightly contact the sliding arc14. Therefore, the driving pivot aperture21is disposed at a lower end of the adjustable slot16, as shown inFIG. 3. When a user wants to perform a cutting operation, with reference toFIG. 4andFIG. 3, he or she opens the handles26of the applying arms20,200, such that the rotation portion23rotates along the sliding arc14and the indentation25is pushed by the protrusion15. Therefore, the applying arms20,200swing around the protrusion15to cause the pushing edge24to contact the pushing arc13and the driving pivot aperture21to swing outwardly. When the handles26of the applying arms20,200are rotated outwardly more, the driving pivot aperture21becomes closer to the main pivot apertures11of the cutting members10,100, such that the driving pivot aperture21moves from the lower end of the adjustable slot16upwardly and the cutting members10,100rotate around the main pivot aperture11. Please refer toFIG. 7withFIG. 6. When the handles26of the two applying arms20,200are pushed closed to drive the cutting members10,100to close to perform a cutting movement, the pushing edges24of the applying arms20,200generate a rotatable pushing force on the pushing arc13. When the securing apertures32of the assembling members30,300are locked onto the two sides of the applying arms20,200, the securing apertures31are secured with the main pivot aperture11of the cutting member10,100, such that the pushing edge24remains in contact with the pushing arc13to prevent offsetting. Further, when the blade portions12are cutting into a target object and the interaction between the blade portions12and the target object increases and so requires a stronger force, the driving pivot aperture21moves downwardly in the adjustable slot16to increase the torque for the blade portions12, as shown inFIG. 7.

With the above-mentioned structure, the following benefits can be obtained: when a user presses the handles26of the applying arms20,200to close together, the cutting members10,100are driven to close together to perform a cutting movement, such that the pushing edge24of the applying arm20,200generates a rotatable pushing force on the pushing arc13. Furthermore, when the blade portions12are cutting into a target object, the interaction between the blade portions12and the target object increases, which requires a stronger application force, the driving pivot aperture21moves downwardly in the adjustable slot16to increase the torque for the blade portion12.