The disclosure relates to pruning shears (100) comprising: a cutting head (110) with a spring-biased blade (111)； a driving line (120) connected at a first end (121) of the driving line (120) to the spring-biased blade (111)； an elongated body (130)； and a handle (140). The pruning shears (100) comprise a wheel (150) having a frusto-conical shape connected rotatably to the handle (140)； the wheel (150) comprises a first end (151) and a second end (152), the diameter (D1) of the wheel (150) at the first (151) end being smaller than the diameter (D2) of the wheel at the second end (152)； the driving line (120) is arranged into the spiral groove (153) and wound at least once around the wheel (150) along the spiral groove (153) at the first (151) end of the wheel (150)； a second end (122) of the driving line (120) is attached to a second end (132) of the elongated body (130)； and the driving line (120) wound around the wheel (150) is arranged to move towards the second end (152) of the wheel (150) as a result of unwinding of a part of the driving line (120) from around the wheel (150) and winding of another part of the driving line (120) to around the wheel (150) for decreasing the distance between the first end (121) of the driving line (120) and the second end (122) of the driving line (120) resulting in a movement of the spring-biased blade (111) in relation to the jaw (112), when the handle (140) is moved along the elongated body (130).本發明涉及一種修枝剪，包括：具有被彈簧偏壓的刀片的切割頭；在第一端部連接到被彈簧偏壓的刀片的驅動線；細長本體；和手柄。修枝剪包括輪，輪具有截頭圓錐狀形狀且能轉動地連接到手柄；輪包括第一端部和第二端部，輪在第一端部處的直徑小於輪在第二端部處的直徑；驅動線佈置到螺旋槽中並且在輪的第一端部處沿著螺旋槽圍繞輪捲繞至少一圈；驅動線的第二端部附接到細長本體的第二端部；並且圍繞輪捲繞的驅動線佈置成因從輪解繞驅動線的一部分並且將驅動線的另一部分圍繞輪捲繞而朝向輪的第二端部移動，以減小驅動線的第一端部和第二端部之間的距離，從而當手柄沿著細長本體移動時使得刀片相對於鉗口移動。
