Adjustable opening size garden shears

Abstract

An adjustable-aperture gardening pruning shears comprises: a first blade body, a second blade body, an adjustment unit, and a safety device. The first blade body has a first cutting section, a first handle, and a first disc. The first cutting section has a first receiving groove and a second receiving groove. The second blade body has a second cutting section, a second handle, and a second disc. The second cutting section has an adjustment elongated hole. The second disc has an arc-shaped hole and two positioning holes. The adjustment unit has a control ring, a positioning pin, a shaft bolt, and a locking element. A lever extends from the control ring, and an arc-shaped block and a positioning post protrude from its inner surface. The arc-shaped block has an arc groove.

Claims

1. A gardening pruning shears with an adjustable opening size, comprising: a first blade body, a second blade body, an adjustment unit, and a safety device, wherein: The first blade has a first shearing part and a first extension section connected together, so that the first extension section provides a first handle for covering. A first disc extends from the first handle. The first disc and the first shearing part are each provided with a first shaft hole and a slot. The first shearing part is also provided with an arc-shaped first receiving groove and a second receiving groove. The first receiving groove and the second receiving groove are connected to each other, and the length of the second receiving groove is shorter than that of the first receiving groove. The second blade has a second shearing section and a second extension section connected together, so that the end section of the second shearing section and the second extension section together provide a second handle for covering. A second disc extends from the second handle. The second disc and the second shearing section are respectively provided with a second shaft hole and a locking hole. The end section of the second shearing section and the second handle are respectively provided with a first channel and a second channel. The second shearing section is provided with an adjustment elongation hole outside the locking hole. The second disc is provided with an arc hole on one side of the second shaft hole. The arc hole expands in a stepped manner from one end to the other side near the second shaft hole, so that a larger first accommodating space and a smaller second accommodating space are respectively formed at the two ends of the arc hole. The second disc is provided with two positioning holes that keep them separated on the other side of the second shaft hole. The adjustment unit has a control ring, a positioning pin, a shaft bolt, and a locking member. A lever extends from the control ring, and an arc-shaped block protrudes from its inner side. The arc-shaped block has an arc groove, through which one end of the positioning pin is inserted. The control ring is then placed on the outer side of the second disc, and the arc-shaped block is placed in the first accommodating space, allowing the other end of the positioning pin to pass through the adjustment hole and the first accommodating groove. The shaft bolt passes through the first shaft hole, the locking hole, the second shaft hole, and the control ring, and the locking member locks the shaft bolt, allowing the first and second blade bodies to be smoothly connected. The opening size of the first and second shearing parts can be adjusted by rotating the control ring through the lever. A positioning post extends from the inner side of the control ring, which is used to engage with one of the positioning holes after the control ring rotates to achieve a secure positioning after adjustment. The safety device has two push buttons that use screws for locking. A limiting bolt is connected between the two push buttons and passes through the second channel and the first channel. The push button moves to drive the limiting bolt into the slots of the first shearing part and the first disc body, so that the first shearing part and the second shearing part can be reliably kept in the locked state after they are closed, so as to prevent the first shearing part and the second shearing part from opening at will and injuring people.

2. Gardening pruning shears with adjustable opening size as described in claim 1, wherein, The first cutting part is a blade, while the second cutting part is an anvil.

3. Gardening pruning shears with adjustable opening size as described in claim 1, wherein, The second receiving groove is the first shaft hole that is closer to the first shearing portion than the first receiving groove.

4. Gardening pruning shears with adjustable opening size as described in claim 1, wherein, The first grip and the second grip are supported by an elastic element.

5. Gardening pruning shears with adjustable opening size as described in claim 4, wherein, The elastic element is a barrel spring made of a metal plate wound up.

6. Gardening pruning shears with adjustable opening size as described in claim 4, wherein, The elastic element is a compression spring made of wound metal wire.

7. Gardening pruning shears with adjustable opening size as described in claim 1, wherein, A recess is formed on the outer surface of the second disc.

8. Gardening pruning shears with adjustable opening size as described in claim 1, wherein, The second disc has a notch to accommodate the lever.

9. Gardening pruning shears with adjustable opening size as described in claim 1, wherein, The second grip is equipped with two positioning components that are pushed outward by a spring, while the inner side of the push button is provided with two positioning grooves.

10. Gardening pruning shears with adjustable opening size as described in claim 1, wherein, The bolt passes through a cover before locking with the locking mechanism.

11. The gardening pruning shears with adjustable opening size as described in claim 1, wherein, The bolt has a square portion that engages with the locking hole.

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