CN1323511A

CN1323511A - Double teeth horticultural shears

Info

Publication number: CN1323511A
Application number: CN 01115711
Authority: CN
Inventors: 奥拉维·林登; 马库斯·帕洛黑莫
Original assignee: Fiskars Garden Oy AB
Current assignee: Fiskars Garden Oy AB
Priority date: 2000-05-12
Filing date: 2001-05-14
Publication date: 2001-11-28
Anticipated expiration: 2021-05-14
Also published as: HK1043505A1; CN1200601C

Abstract

A hedge having two opposing cutting blades connected to handles. Both of the cutting blades and both of the handles have gear elements formed as part of the blade or handle. The gear element of one handle engages the gear element of one of the cutting blades, while the gear element of the other handle engages the gear element of the other cutting blade so that a variable force is provided throughout the cutting stroke.

Description

Double teeth horticultural shears

The application requires the U.S. Provisional Application No.60/203 that submits on May 12nd, 2000,653 right, in these whole disclosures that comprised this provisional application with for referencial use.

The application relates to a kind of double teeth horticultural shears, specifically, relates to a kind of indented joint that uses to improve the scissors of shear efficiency between handle and blade.

In the process of using traditional garden shears to shear, in the incipient stage of shearing, branch is drawn in the sector region that is formed by shear-blade.In shear history, most branch is cut off by the outermost portion of blade.And this is very disadvantageous, because shearing force herein is minimum.Therefore, traditional garden shears must apply extra power to shear the branch at the outermost point place, and this will cause the user to use bigger power and the low efficient in the shear history.

In most of known equipment, in whole shear history, it is constant that shearing force keeps.Power output when consequently, the size of the power output of using when shearing branch equals to draw branch in when shearing beginning.Because draw the shearing force of using when branch requires the shearing force used less than the shearing branch in, constant power output can cause the poor efficiency in shearing manipulation.

In different cutters, be extensive use of tooth and system of connections.The purpose of these systems is to increase shearing force.This will increase the motion of handle, so force the user to pay above the employed power under the normal condition.

It is known using tooth in the prior art in garden shears.For example, Gardner (Gardena) sells a kind of tooth-like scissors that can increase by 35% shearing force.Gardner (Gardena) system has increased shearing force really, keeps constant disadvantage but still have in whole shear history shearing force, and this will cause above-mentioned low efficient.In contrast to this, having high efficiency garden shears should use minimum power simultaneously drawing branch apace in, and should bring into play maximum power and handle motion in shear stage.

The system that can change shearing force also is known.The luxuriant and rich with fragrance Arvydas Macijauskas of the application's assignee (Fiskars) has the U.S. Patent No. 5,689,888 of a variable force instrument, and it has the structure of tooth, thereby in use during actual needs, promptly in the centre of branch, has maximum power.This instrument uses planetary gears, and this mechanism is arranged on the cutter ideally, is asymmetric in the motion of this handle and blade.Can be to use garden shears to have some problems, because the motion of common blade and handle is symmetrical with this mechanism.In addition, because main scissors generally has the symmetric motion of parts, the parts itself that constitute scissors also are symmetrical.In this manner, can reduce the manufacturing expense of scissors because only use a mould for handle aborning, for blade also only with a mould.

Therefore, need provide a kind of scissors that can in shear history, change shearing force, keep maximum power and be used to shear.In addition, need provide a kind of garden shears, wherein in shear history, can change the scissors of shearing force, and the blade of garden shears and handle are symmetrical.

The present invention relates to a kind of cutting implement, comprising: have the first handle of the first tooth parts and have the second handle of the second tooth parts.Cutting implement also comprises first shear-blade with the 3rd tooth parts, has second shear-blade of the 4th tooth parts.First shear-blade is connected on the first handle, and second shear-blade is connected on the second handle.The first tooth parts are meshed with the 4th tooth parts, and the second tooth parts are meshed with the 3rd tooth parts.

The invention still further relates to a kind of garden shears of improving shear ability that have, comprising: first cutting member, this first cutting member comprise first handle, first blade, first handle tooth and the first blade tooth; Second cutting member, this second cutting member comprise second handle, second blade, second handle tooth and the second blade tooth; Be used for the connector that pivotally first and second cutting members linked together, thereby the first handle tooth is meshed with the second blade tooth, the second handle tooth is meshed with the first blade tooth.

The invention still further relates to a kind of two groups of cutting implements that are used to produce the engaging tooth that increases shearing force that have, comprising: first and second handles, first handle comprise the first handle tooth, and second handle comprises the second handle tooth, and wherein the first and second handle teeth are symmetrical; First and second blades, first blade comprise the first blade tooth, and second blade comprises the second blade tooth, and wherein the first and second blade teeth are symmetrical; Second cutting member, this second cutting member comprise second handle, second blade, second handle tooth and the second blade tooth; Be used for first handle is connected on first blade and second handle is connected to device on second blade; And be used for pivotally first blade being connected to device on second blade; Wherein, the first handle tooth is meshed with the second blade tooth, and the second handle tooth is meshed with the first blade tooth, thereby increases shearing force when first and second blades move to closing position.

Fig. 1 is the perspective view of the preferred embodiment of the present invention;

Fig. 2 is the decomposition diagram of invention shown in Figure 1;

Fig. 3 is blade of the present invention shown in Figure 1 and the handle vertical view in closing position;

Fig. 4 is an end view of the present invention shown in Figure 1;

Fig. 5 is the present invention shown in Figure 2 amplification plan view along 5-5 line shown in Figure 3;

Fig. 6 is blade of the present invention shown in Figure 1 and the handle vertical view at open position;

Before explaining at least one preferred embodiment of the present invention, be described is not construed as limiting the present invention with accompanying drawing below being understandable that.The embodiment that the present invention still can have other with can realize by different approach.The employed term of following description and phrase in addition, should be appreciated that, in order should not to be regarded as a kind of restriction.

With reference to the accompanying drawings, shown a kind of cutting tool with garden shears.Garden shears 10 comprise handle 12 and 14.The parts of the elongation that handle 12 and 14 is normally straight, and can make with steel, plastics, aluminium or other known material that is fit to.In addition, handle 12 comprises grip 15a, and handle 14 comprises grip 15b.In a preferred embodiment, grip 15a and 15b are made by the material rubber of the user's grasping that is suitable for garden shears 10.These grips can be set at the end of

handle

12 and 14, or form as one with handle.Interchangeable is that this

handle

12 and 14 comprises that grip 15a and 15b can be made by identical materials.In this interchangeable embodiment, the handle surfaces that forms grip can comprise the rib of projection or put the firmly grasping garden shears with further enhancing user.

Garden shears 10 also comprise and add shear-blade 16 and 18.

Blade

16 and 18 has

shear blade

17 and 19 respectively.

Shear blade

17 and 19 is faced mutually, thereby when

blade

16 and 18 is closed in together with shearing plant or other material,

shear blade

17 and 19 objects that interact and be cut with shearing.Preferred

shear blade

16 and 18 is formed by steel or aluminium, still also can be by known formation in the prior art.

Demonstrate especially in Fig. 2, blade 16 is connected on the handle 14, and blade 18 is connected on the handle 12.Consequently the cutting member 30 and 31 by two separation forms, and wherein cutting member 30 comprises handle 12 and blade 18, and cutting member 31 comprises handle 14 and blade 16.In a preferred embodiment, use securing member 20 pivotally handle and blade to be linked together.In a preferred embodiment, securing member 20 comprises that the pivotal pin that has nut is so that can move pivotally on the position of securing member.Alternatively, securing member 20 can be the securing member that other any kind can make the securing member rotation.

Clearly show in Fig. 2 and 5, handle 12 comprises tooth parts 25 on an end of this handle, and handle 14 comprises tooth parts 27 on an end of this handle.Blade 16 includes as its a part of tooth parts 29, and blade 18 includes as its a part of tooth parts 31.When using garden shears 10, the blade tooth of a cutting member will be meshed with the blade tooth of other cutting member.Know demonstration as Fig. 6, when fitting together, be meshed with blade tooth 29 on blade 16, and be meshed with blade tooth 31 on blade 18 at the handle tooth 27 on the handle 14 at the handle tooth 25 on the handle 12.

In a preferred embodiment of the invention,

handle

12 and 14 comprises handle tooth 25 and 27, all is of similar shape.Similarly be, in a preferred embodiment of the invention, shear-

blade

16 and 18 and their blade tooth 29 and 31 also be of similar shape.The component form of this symmetry has reduced owing to making the producing cost that different parts produce manufacturer.Because blade and handle are of similar shape respectively, therefore in the manufacturing, only need process with a mould or additional forming to every kind of parts.

Fig. 3 has shown the garden shears 10 in closing position, and Fig. 6 has shown the garden shears at open position.When handle was moved to the open position of Fig. 6 by the closing position from Fig. 3, handle 25 and blade tooth engage so that blade 16 and opening in 18 minutes.Pivotal pin 33 plays the effect of pivotal point of the rotation of cutting member 30 and 31.So when garden shears are opened, handle and blade will pivot round securing member 20, blade will be around pivotal pin 33 rotations.Pivotal pin 33 can be one and be allowed to cutting member 30 and 31 nut or the fixing traditional linear axis pivotal pins of other securing member that is fit to around the fixing point rotation.In addition, the lubricant that grease or other can be fit to applies the friction that is added on the pivotal pin 33 when reducing garden shears and open and close.

Select handle tooth 25 and 27 and the structure of blade tooth 29 and 31 during shearing, to increase power output.In a preferred embodiment, handle tooth 25 and 27 and blade tooth 29 and 31 form the tooth or the finger piece of the elongation of one group of circle.Other structure also is possible, and will produce similar result.For example, the tooth in the embodiment that can replace can be the performance with the change garden shears that widen or lengthening.At one as shown in Figure 5 in the preferred embodiment, the handle tooth comprises makes the toothed portion that increases towards the length in the outside of garden shears.The blade tooth has the relative structure that allows handle tooth and blade tooth to be meshed.

When

handle

12 and 14 is moved to the closing position of Fig. 3 by the open position from Fig. 6, because the structure of tooth will make the cutting out section applied force of blade change.So in the incipient stage of shearing, wherein branch and other object are drawn in the shearing scope of garden shears, the ratio of shearing force approximately is 1: 1.When continue shearing, the ratio of shearing force has been owing to increased with the relation of the power of input, reaches maximum shear stress on

blade

16 and 18 ends closed together.In a preferred embodiment, can reach the ratio of minimum 2: 1 shearing force in this mode.In another preferred embodiment, can reach the ratio of minimum 3: 1 shearing force in this mode.Use garden shears of the present invention can make the user reduce expense, laborsaving, because the final stage of the maximum shearing stayed of trying hard to keep, when branch and other object during by scissor cut.This is time saving and energy saving, effective with very convenient user.

Therefore, be apparent that, can be used to realize above-mentioned purpose and advantage according to double teeth horticultural shears provided by the present invention.Although the present invention is described by certain embodiments at this, for the those of ordinary skill in the technology of the present invention field, can do not depart from the scope of the present invention with spirit under, the present invention is carried out some improvement and variation.

Claims

1. cutting implement comprises:

First handle with first tooth parts;

Second handle with second tooth parts;

Have first shear-blade of the 3rd tooth parts and be connected on the first handle;

Have second shear-blade of the 4th tooth parts and be connected on the second handle;

Wherein, the first tooth parts are meshed with the 4th tooth parts, and the second tooth parts are meshed with the 3rd tooth parts.

2. a kind of cutting implement as claimed in claim 1 is characterized in that: the first and second tooth parts are formed integrally as the part of first and second handles.

3. a kind of cutting implement as claimed in claim 1 is characterized in that: the third and fourth tooth parts are formed integrally as the part of third and fourth handle.

4. a kind of cutting implement as claimed in claim 1 is characterized in that: described tooth parts provide a kind of shearing force, the size ratio of described shearing force along with blade from the open position to the closing position the shear history that moves and change.

5. a kind of cutting implement as claimed in claim 1 is characterized in that: the shape of first and second handles is identical.

6. a kind of cutting implement as claimed in claim 1 is characterized in that: the shape of first and second shear-blades is identical.

7. one kind has the garden shears of improving shear ability, comprising:

First cutting member, this first cutting member comprise first handle, first blade, first handle tooth and the first blade tooth;

Second cutting member, this second cutting member comprise second handle, second blade, second handle tooth and the second blade tooth;

Be used for the connector that pivotally first and second cutting members linked together, thereby the first handle tooth is meshed with the second blade tooth, the second handle tooth is meshed with the first blade tooth.

8. a kind of garden shears as claimed in claim 7 is characterized in that: the first handle tooth is formed integrally as the part of first handle, and the second handle tooth is formed integrally as the part of second handle.

9. a kind of garden shears as claimed in claim 7 is characterized in that: the first blade tooth is formed integrally as the part of first blade, and the second blade tooth is formed integrally as the part of second blade.

10. a kind of garden shears as claimed in claim 7 is characterized in that: the shape of first and second handles is identical, and the shape of the first and second handle teeth is identical.

11. a kind of garden shears as claimed in claim 7 is characterized in that: the shape of first and second blades is identical, the shape of the first and second blade teeth is identical.

12. a kind of garden shears as claimed in claim 7 is characterized in that: also comprise being used for first handle is connected on first blade and second handle being connected to device on second blade.

13. a kind of garden shears as claimed in claim 7 is characterized in that: the engagement of tooth provides a kind of shearing force, the size ratio of described shearing force along with blade from the open position to the closing position the shear history that moves and change.

14. a kind of garden shears as claimed in claim 7 is characterized in that: the size ratio of described shearing force was at least 2: 1.

15. one kind has two groups of cutting implements that are used to produce the engaging tooth that increases shearing force, comprising:

First and second handles, first handle comprise the first handle tooth, and second handle comprises the second handle tooth, and wherein the first and second handle teeth are symmetrical;

First and second blades, first blade comprise the first blade tooth, and second blade comprises the second blade tooth, and wherein the first and second blade teeth are symmetrical;

Be used for first handle is connected on first blade and second handle is connected to device on second blade; And

Be used for pivotally first blade being connected to the device on second blade;

Wherein, the first handle tooth is meshed with the second blade tooth, and the second handle tooth is meshed with the first blade tooth, thereby shearing force is increased when first and second blades move to closing position.

16. a kind of cutting implement as claimed in claim 15 is characterized in that: the first and second handle teeth comprise a plurality of teeth, and outmost tooth is longer than innermost tooth.

17. a kind of cutting implement as claimed in claim 15 is characterized in that: the first and second handle teeth are formed integrally as the part of first and second handles.

18. a kind of cutting implement as claimed in claim 15 is characterized in that: the first and second blade teeth are formed integrally as the part of first and second blades.

19. a kind of cutting implement as claimed in claim 15 is characterized in that: the size ratio that the engagement of tooth makes described shearing force along with blade from the open position to the closing position the shear history that moves and change.

20. a kind of cutting implement as claimed in claim 19 is characterized in that: power output was at least 2: 1 with the ratio of input power when first and second blades reach the position of closure.