GB2542612A - A pair of tree shears - Google Patents
A pair of tree shears Download PDFInfo
- Publication number
- GB2542612A GB2542612A GB1517027.7A GB201517027A GB2542612A GB 2542612 A GB2542612 A GB 2542612A GB 201517027 A GB201517027 A GB 201517027A GB 2542612 A GB2542612 A GB 2542612A
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- GB
- United Kingdom
- Prior art keywords
- handle
- pivot member
- section
- link rod
- pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/02—Secateurs; Flower or fruit shears
- A01G3/025—Secateurs; Flower or fruit shears having elongated or extended handles
- A01G3/0251—Loppers, i.e. branch cutters with two handles
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Environmental Sciences (AREA)
- Scissors And Nippers (AREA)
Abstract
A pair of tree shears capable of reducing the opening degree of its two handles. The first handle (2) is connected with a first blade (11), the second handle (3) has front (31) rear (32) sections sleeved with each other, and the front section (31) is connected with the second blade (12). A link rod (4) has an end pivoted with the first handle and another end pivoted with the rear section of the second handle (3). While the two handles are opened, the link rod affects the front section of the second handle to move relative to the rear section of the second handle (3), so as to adjust a length of the second handle to reduce the opening degree of the handles. The first handle may also have a front (22) and rear (23) section which move relative to each other due to a second link rod (82).
Description
A pair of tree shears
The present invention relates to a pair of shears, more particularly to a pair of pair of tree shears for cutting a branch of a plant. A pair of pair of tree shears is used to cut a branch of a plant. Operating the pair of tree shears usually requires a relatively large force, so the pair of tree shears includes relatively long handles to reduce the amount of force required. There are many commercially available pairs of tree shears which have handles with adjustable lengths, most of the ways of adjusting the lengths of the handles are different, but their adjustment concepts usually involve extendable pipe structures and a controlling device to fasten lengths of the pipes.
However, when the tree shears are opened, longer handles may cause an excessive opening degree and the user must have their hands wide apart to operate them. Longer handles can provide a force-saving effect, but the handles with the excessive large opening degree are non-ergonomic and hard to operate opening and closing actions for cutting. In addition, the controlling device for adjusting the lengths of the handles cannot be controlled during cutting operation, so it is not convenient to use a conventional pair of tree shears. A primary objective of the present invention is to provide a pair of tree shears capable of reducing an opening degree of handles thereof. The handle has an extendable structure and can be guided by a link rod, so the lengths of the handles can be adjusted while the handles are opened. Therefore, the opening degree of the handles can be reduced, and the tree shears can be more ergonomic and the applied force required for cutting can be reduced.
To achieve the primary objective, the present invention provides a pair of tree shears capable of reducing an opening degree of handles thereof. The tree shears include a shearing part, a first handle, a second handle and a first link rod. The shearing part includes a first blade and a second blade pivoted with each other. The first handle is connected with the first blade. The second handle has a second front section and a second rear section. The second front section is connected with the second blade, and the second front section and the second rear section are sleeved with each other (possibly telescopically) and movable relative to each other, so as to adjust a length of the second handle. The first link rod has an end pivoted with the first handle and other end pivoted with the second rear section.
In an embodiment, the first handle is formed with a first front pivot member disposed at an end thereof connected with the first blade, and the second rear section is formed with a second rear pivot member disposed at an end thereof near the second front section, and two ends of the first link rod are respectively pivoted with the first front pivot member and the second rear pivot member.
Moreover, the first handle has a first front section and a first rear section, the first front section is connected with the first blade, and the first front section and the first rear section are sleeved with each other and movable relative to each other, so as to adjust a length of the first handle. The first link rod is connected with the first front section and the second rear section, and the first rear section and the second front section are connected via a second link rod.
The first rear section is a hollow pipe, and the first front section is slidably inserted into the first rear section. The second rear section is a hollow pipe, and the second front section is slidably inserted into the second rear section.
The first rear section is formed with a first rear pivot member, the second front section is formed with a second front pivot member disposed at an end thereof connected with the second blade, and two ends of the second link rod are respectively pivoted with the first rear pivot member and the second front pivot member. Moreover, the first front pivot member and the first rear pivot member are disposed at a side of the first handle facing the second handle, and the second front pivot member and the second rear pivot member are disposed at a side of the second handle facing the first handle. A reference plane passing through centres of the first handle and the second handle both is defined, the first front pivot member and the second rear pivot member connected with the first link rod are located at a side of the reference plane, and the first rear pivot member and the second front pivot member connected with the second link rod are located at opposite side of the reference plane.
One of the first link rod and the second link rod is formed by two rods which are pivoted with each other, and a stop member is fastened at both sides of a location where the two rods are pivoted, so as to prevent excessive pivot of the two rods.
In order to further understand the techniques, means and effects of the present disclosure, the following detailed descriptions and appended drawings are hereby referred, such that, through which, the purposes, features and aspects of the present disclosure can be thoroughly and concretely appreciated; however, the appended drawings are merely provided for reference and illustration, without any intention to be used for limiting the present disclosure.
The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
The invention will now be described in detail by way of example with reference to the drawings, in which:
Fig. 1 is a plan view of a first embodiment of the present invention;
Fig. 2 is an exploded view of the first embodiment of the present invention;
Fig. 3 is a schematic view of a usage status of the first embodiment of the present invention;
Fig. 4 is a plan view of a second embodiment of the present invention;
Fig. 5 is an exploded view of the second embodiment of the present invention;
Fig. 6 is a cross-sectional view taken along a line A-A shown in the Fig. 4;
Fig. 7 is a schematic view of a usage status of the second embodiment of the present invention;
Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
Figs. 1 and 2 respectively show a pair of tree shears of a first embodiment of the present invention. The pair of tree shears capable of reducing an opening degree of handles thereof, includes a shearing part 1, a first handle 2 and a second handle 3. The shearing part 1 is formed by pivoting a first blade 11 and a second blade 12. A user can control the two blades 11 and 12 to oppositely pivotally rotate to cut the branch of a plant. The first blade 11 and the second blade 12 are respectively formed with connecting parts 111 and 121 extended therefrom to combine with the first handle 2 and the second handle 3. The user can operate the two handles 2 and 3 to control the two blades 11 and 12.
In detail, the connecting part 111 of the first blade 11 is fastened with a top end of the first handle 2; on the other hand, the connecting part 121 of the second blade 12 is fastened with a top end of the second handle 3. The first handle 2 has a first front section 22 and a first rear section 23 which have structures capable of being sleeved with each other or connected with each other integrally. The second handle 3 includes a second front section 31 and a second rear section 32, the second blade 12 is combined with the second front section 31, and the second front section 31 and the second rear section 32 are sleeved with each other. In this embodiment, the second rear section 32 is a hollow pipe defining a chamber 321 inside. The second front section 31 is inserted into the chamber 321 and slidable in the chamber 321. By means of the structural design, the entire length of the second handle 3 can be adjusted by changing relative locations of the second front section 31 and the second rear section 32.
In addition, the first handle 2 and the second handle 3 are connected through a first link rod 4. In this embodiment, the first handle 2 is formed with a first front pivot member 21 disposed at an end thereof connected with the first blade 11, and a second rear pivot member 33 is disposed at the second rear section 32. Two ends of the first link rod 4 are respectively pivoted with the first front pivot member 21 and the second rear pivot member 33. Moreover, the first front pivot member 21 is disposed at a side of the first handle 2 facing the second handle 3, the second rear pivot member 33 is disposed at a side of the second rear section 32 facing the first handle 2, thereby arranging the first link rod 4 between the first handle 2 and the second handle 3.
While holding the two handles 2 and 3 by two hands to open the pair of tree shears, as shown in Fig. 3, the user can control the first handle 2 and the second handle 3 to gradually move apart from each other, the first link rod 4 affects the second rear section 32 to move relative to the second front section 31 because of the constant length of the first link rod 4, so that the second front section 31 is gradually received into the second rear section 32 to reduce the entire length of the second handle 3. Hereby, a distance between the first handle 2 and the second handle 3, that is an opening degree between the two handles 2 and 3, is decreased along with the shortened length of the second handle 3, so that the structural status of the pair of tree shears after two handles 2 and 3 are opened, is more ergonomic, and it reduces the amount of force required to close the two handles 2 and 3 for cutting.
Figs 4 and 5 show a second embodiment of the present invention. The pair of tree shears of the second embodiment includes a shearing part 5, a first handle 6 and a second handle 7. The shearing part 5 is formed by pivoting a first blade 51 and a second blade 52, and the user can control the two blades 51 and 52 to oppositely pivotally rotate to cut a branch of a plant. The first blade 51 and the second blade 52 are respectively formed with connecting parts 511 and 521 extended therefrom to respectively combine with the first handle 6 and the second handle 7, so that the user can operate the two handles 6 and 7 to control the two blades 51 and 52.
The first handle 6 has a first front section 61 and a first rear section 62. The connecting part 511 of the first blade 51 is fastened with a top end of the first front section 61, and the first front section 61 and the first rear section 62 are sleeved with each other. In this embodiment, the first rear section 62 is a hollow pipe defining a first chamber 621 inside. The first front section 61 is inserted into the first chamber 621 and slidable in the first chamber 621. By means of the structural design, an entire length of the first handle 6 can be adjusted by changing relative locations of the first front section 61 and the first rear section 62.
The second handle 7 has a second front section 71 and a second rear section 72. The connecting part 521 of the second blade 52 is fastened with a top end of the second front section 71, and the second front section 71 and the second rear section 72 are sleeved with each other. In this embodiment, the second rear section 72 is a hollow pipe defining a second chamber 721 inside. The second front section 71 is inserted into the second chamber 721 and slidable in the second chamber 721. By means of the structural design, an entire length of the second handle 7 can be adjusted by changing relative locations of the second front section 71 and the second rear section 72.
The first handle 6 and the second handle 7 are connected via a first link rod 81 and a second link rod 82. In this embodiment, the first front section 61 is formed with a first front pivot member 63 disposed at a top end thereof and the first rear section 62 is formed with a first rear pivot member 64. The second front section 71 is formed with a second front pivot member 73 disposed at a top end thereof, and the second rear section 72 is formed with a second rear pivot member 74. Two ends of the first link rod 81 are respectively pivoted with the first front pivot member 63 and the second rear pivot member 74 to connect with the first front section 61 and the second rear section 72. Two ends of the second link rod 82 are respectively pivoted with the first rear pivot member 64 and the second front pivot member 73, so as to connect the first rear section 62 and the second front section 71. Moreover, the first front pivot member 63 and the first rear pivot member 64 are respectively disposed on a side of the first handle 6 facing the second handle 7, and the second front pivot member 73 and the second rear pivot member 74 are respectively disposed on a side of the second handle 7 facing the first handle 6, thereby arranging the first link rod 81 and the second link rod 82 between the first handle 6 and the second handle 7.
In addition, the first link rod 81 and the second link rod 82 are arranged in a cross shape, and the thicknesses of the first link rod 81 and the second link rod 82 cause that the pivot members 63, 64, 73 and 74 connected with the two link rods 81 and 82 are not located at the relative positions on the two handles 6 and 7. In detail, as shown in Fig. 6, a reference plane P passing through centres of the first handle 6 and the second handle 7 is defined. The first front pivot member 63 and the second rear pivot member (not shown in Figs) connected with the first link rod 81 are located at a side of the reference plane P, and the first rear pivot member 73 and the second front pivot member (not shown in Figs) connected with the second link rod 82 are located at opposite side of the reference plane P, thereby preventing the interference between the first link rod 81 and the second link rod 82 between the two handles 6 and 7.
On the other hand, one of the first link rod 81 and the second link rod 82 is formed by two rods which are pivoted with each other. In this embodiment, the second link rod 82 is formed by rods 821 which are pivoted with each other. In addition, a stop member 822 is fastened at both sides of a location where the two rods 821 are pivoted, to prevent excessive pivot of the two rods 821.
As shown in Fig, 7, while holding the two handles 6 and 7 by two hands, the user can control the first handle 6 and the second handle 7 to gradually move apart from each other. Because of the constant length of the first link rod 81 and the second link rod 82, the first link rod 81 affects the first front section 61 and the second rear section 72, and the second link rod 82 affects the first rear section 62 and the second front section 71 at the same time, so that the first front section 61 is moved relative to the first rear section 62 to be gradually received into the first rear section 62, and the second front section 71 is moved relative to the second rear section 72 to be gradually received into the second rear section 72, thereby respectively reducing the entire lengths of the first handle 6 and the second handle 7. Hereby, a distance between the first handle 6 and the second handle 7, that is an opening degree between the two handles 6 and 7, is decreased along with the shortened lengths of the first handle 6 and the second handle 7, so that the structural status of the pair of tree shears after two handles 6 and 7 are opened, is more ergonomic, and it saves more forces to close the two handles 6 and 7 for cutting.
In addition, during the process of closing the two handles 6 and 7, the slight pivot between the two rods 821 of the second link rod 82 can make the closing action of the two handles 6 and 7 more smooth.
The above-mentioned descriptions represent merely the exemplary embodiment of the present disclosure, without any intention to limit the scope of the present disclosure thereto. Various equivalent changes, alternations or modifications based on the claims of present disclosure are all consequently viewed as being embraced by the scope of the present disclosure.
Claims (11)
1. A pair of tree shears capable of reducing an opening degree of handles thereof, comprising: a shearing part, comprising a first blade and a second blade pivoted with each other; a first handle, connected with the first blade; a second handle, having a second front section and a second rear section, wherein the second front section is connected with the second blade, the second front section and the second rear section are sleeved with each other and movable relative to each other, so as to adjust a length of the second handle; and a first link rod, having an end pivoted to the first handle and other end pivoted to the second rear section.
2. The pair of tree shears according to claim 1, wherein the second rear section is a hollow pipe, and the second front section is slidably inserted into the second rear section.
3. The pair of tree shears according to claim 1, wherein the first handle is formed with a first front pivot member disposed at an end thereof connected with the first blade, and the second rear section is formed with a second rear pivot member disposed at an end thereof near the second front section, and two ends of the first link rod are respectively pivoted with the first front pivot member and the second rear pivot member.
4. The pair of tree shears according to claim 3, wherein the first front pivot member is disposed at a side of the first handle facing the second handle, and the second rear pivot member is disposed at a side of the second handle facing the first handle.
5. The pair of tree shears according to claim 1, wherein the first handle has a first front section and a first rear section, the first front section is connected with the first blade, and the first front section and the first rear section are sleeved with each other and movable relative to each other, so as to adjust a length of the first handle, and the first link rod is connected with the first front section and the second rear section.
6. The pair of tree shears according to claim 5, wherein the first rear section and the second front section are connected via a second link rod.
7. The pair of tree shears according to claim 6, wherein the first front section is formed with a first front pivot member disposed at an end thereof connected with the first blade, the first rear section is formed with a first rear pivot member, the second front section is formed with a second front pivot member disposed at an end thereof connected with the second blade, and the second rear section is formed with a second rear pivot member; wherein two ends of the first link rod are respectively pivoted with the first front pivot member and the second rear pivot member, and two ends of the second link rod are respectively pivoted with the first rear pivot member and the second front pivot member.
8. The pair of tree shears according to claim 7, wherein the first front pivot member and the first rear pivot member are disposed at a side of the first handle facing the second handle, and the second front pivot member and the second rear pivot member are disposed at a side of the second handle facing the first handle.
9. The pair of tree shears according to claim 8, wherein a reference plane passing through centres of the first handle and the second handle both is defined, the first front pivot member and the second rear pivot member connected with the first link rod are located at a side of the reference plane, and the first rear pivot member and the second front pivot member connected with the second link rod are located at opposite side of the reference plane.
10. The pair of tree shears according to claim 6, wherein one of the first link rod and the second link rod is formed by two rods which are pivoted with each other, and a stop member is fastened at both sides of a location where the two rods are pivoted, so as to prevent excessive pivot of the two rods.
11. A pair of tree shears capable of reducing an opening degree of handles thereof substantially as described herein with reference to the drawings.
11. A pair of tree shears capable of reducing an opening degree of handles thereof substantially as described herein with reference to the drawings. Amendments to the Claims have been filed as follows:- CLAIMS:
1. A pair of tree shears capable of reducing an opening degree of handles thereof, comprising: ί a shearing part, comprising a first blade and a second blade pivoted with each other; a first handle, connected with the first blade; a second handle, having a second front section and a second rear section, wherein the second front section is connected with the second blade, the second front ) section and the second rear section are sleeved with each other and movable relative to each other, so as to adjust a length of the second handle; and a first link rod, having an end pivoted to the first handle and other end pivoted to the second rear section. ί 2. The pair of tree shears according to claim 1, wherein the second rear section is a hollow pipe, and the second front section is slidably inserted into the second rear section.
3. The pair of tree shears according to claim 1, wherein the first handle is formed ) with a first front pivot member disposed at an end thereof connected with the first blade, and the second rear section is formed with a second rear pivot member disposed at an end thereof near the second front section, and two ends of the first link rod are respectively pivoted with the first front pivot member and the second rear pivot member.
4. The pair of tree shears according to claim 3, wherein the first front pivot member is disposed at a side of the first handle facing the second handle, and the second rear pivot member is disposed at a side of the second handle facing the first handle. )
5. The pair of tree shears according to claim 1, wherein the first handle has a first front section and a first rear section, the first front section is connected with the first blade, and the first front section and the first rear section are sleeved with each other and movable relative to each other, so as to adjust a length of the first handle, and the first link rod is connected with the first front section and the second rear section.
6. The pair of tree shears according to claim 5, wherein the first rear section and the second front section are connected via a second link rod.
7. The pair of tree shears according to claim 6, wherein the first front section is formed with a first front pivot member disposed at an end thereof connected with the first blade, the first rear section is formed with a first rear pivot member, the second front section is formed with a second front pivot member disposed at an end thereof connected with the second blade, and the second rear section is formed with a second rear pivot member; wherein two ends of the first link rod are respectively pivoted with the first front pivot member and the second rear pivot member, and two ends of the second link rod are respectively pivoted with the first rear pivot member and the second front pivot member.
8. The pair of tree shears according to claim 7, wherein the first front pivot member and the first rear pivot member are disposed at a side of the first handle facing the second handle, and the second front pivot member and the second rear pivot member are disposed at a side of the second handle facing the first handle.
9. The pair of tree shears according to claim 8, wherein a reference plane passing through centres of the first handle and the second handle both is defined, the first front pivot member and the second rear pivot member connected with the first link rod are located at a side of the reference plane, and the first rear pivot member and the second front pivot member connected with the second link rod are located at opposite side of the reference plane.
10. The pair of tree shears according to claim 6, wherein one of the first link rod and the second link rod is formed by two rods which are pivoted with each other, and a stop member is fastened at both sides of a location where the two rods are pivoted, so as to prevent excessive pivoting of the two rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1517027.7A GB2542612B (en) | 2015-09-25 | 2015-09-25 | A pair of tree shears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1517027.7A GB2542612B (en) | 2015-09-25 | 2015-09-25 | A pair of tree shears |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201517027D0 GB201517027D0 (en) | 2015-11-11 |
| GB2542612A true GB2542612A (en) | 2017-03-29 |
| GB2542612B GB2542612B (en) | 2017-09-13 |
Family
ID=54544141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1517027.7A Expired - Fee Related GB2542612B (en) | 2015-09-25 | 2015-09-25 | A pair of tree shears |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2542612B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2494111Y (en) * | 2001-06-20 | 2002-06-05 | 王耀钦 | Flat tube extension mechanism for tree shears |
| US6883208B1 (en) * | 2003-03-28 | 2005-04-26 | Yao-Chung Huang | Hedge shear extendable handle enhanced structure |
| US20080016700A1 (en) * | 2006-07-18 | 2008-01-24 | Hernandez Hector R | High leverage bolt cutter |
| GB2455519A (en) * | 2007-12-11 | 2009-06-17 | Ho Cheng Garden Tools Co Ltd | A Retractable Handle |
| US8806720B2 (en) * | 2012-01-24 | 2014-08-19 | Green Guard Industry Ltd. | Rack type telescopic handle of horticultural shears |
-
2015
- 2015-09-25 GB GB1517027.7A patent/GB2542612B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2494111Y (en) * | 2001-06-20 | 2002-06-05 | 王耀钦 | Flat tube extension mechanism for tree shears |
| US6883208B1 (en) * | 2003-03-28 | 2005-04-26 | Yao-Chung Huang | Hedge shear extendable handle enhanced structure |
| US20080016700A1 (en) * | 2006-07-18 | 2008-01-24 | Hernandez Hector R | High leverage bolt cutter |
| GB2455519A (en) * | 2007-12-11 | 2009-06-17 | Ho Cheng Garden Tools Co Ltd | A Retractable Handle |
| US8806720B2 (en) * | 2012-01-24 | 2014-08-19 | Green Guard Industry Ltd. | Rack type telescopic handle of horticultural shears |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201517027D0 (en) | 2015-11-11 |
| GB2542612B (en) | 2017-09-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20190925 |