CN103522309A

CN103522309A - Scissors

Info

Publication number: CN103522309A
Application number: CN201310488023.7A
Authority: CN
Inventors: 汤建春
Original assignee: Zhangjiagang City Xinjia Plastic Hardware Product Co Ltd
Current assignee: Zhangjiagang City Xinjia Plastic Hardware Product Co Ltd
Priority date: 2013-10-17
Filing date: 2013-10-17
Publication date: 2014-01-22

Abstract

The invention discloses a pair of scissors which is simple in structure and saves labor. The scissors comprise a first half body and a second half body which are matched mutually and hinged in the middle portions. The tail of the first half body and the tail of the second half body are provided with a first grab handle and a second grab handle respectively, and the head of the first half body and the head of the second half body are provided with a first scissor head and a second scissor head respectively. A first cutting edge is arranged on the side, close to the second scissor head, of the first scissor head, a second cutting edge is arranged on the side, close to the first scissor head, of the second scissor head, the outline of the first cutting edge and the outline of the second cutting edge are arc and arranged symmetrically, and included angles between tangent lines of all crosspoints of the first cutting edge and the second cutting edge are the same.

Description

A kind of scissors

Technical field

The present invention relates to a kind of scissors, refer to especially a kind of labour-saving scissors.

Background technology

Current scissors generally comprises and cooperatively interacts and the first halfbody and the second halfbody that middle part is hinged, described the first halfbody, the second halfbody afterbody be respectively arranged with the first lever and the second lever, the head of the first halfbody and the second halfbody is respectively arranged with the first cutter head and the second cutter head, the first cutter head is to be provided with the first cutting edge in a side of contiguous the second cutter head, the second cutter head is provided with the second cutting edge in a side of contiguous the first cutter head again, the cutting edge that the first cutting edge and the second cutting edge are straight line, when shearing object, finger grips the first lever and the second lever make mutually to have drawn close shearing between the first cutting edge of the first cutter head and the second cutting edge of the second cutter head, as Fig. 1, shown in Fig. 2, due to the first cutter head and the second cutter head from shear start to finishing whole process joining () and the distance between pin joint the first cutting edge and the second cutting edge more and more far away, therefore, the power that the whole process operator of shearing applies can be increasing, cause the shearing of least significant end very difficult, the power applying can be very large.

Summary of the invention

Technical problem to be solved by this invention is: a kind of simple in structure, labour-saving scissors is provided.

For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of scissors, comprise and cooperatively interacting and the first halfbody and the second halfbody that middle part is hinged, described the first halfbody, the second halfbody afterbody be respectively arranged with the first lever and the second lever, the head of the first halfbody and the second halfbody is respectively arranged with the first cutter head and the second cutter head, the first cutter head is to be provided with the first cutting edge in a side of contiguous the second cutter head, the second cutter head is provided with the second cutting edge in a side of contiguous the first cutter head again, the outline line of the first cutting edge and the second cutting edge is arc and is arranged symmetrically with, the first cutting edge is all identical with the angle of the second cutting edge between the tangent line of arbitrary joining.

As a kind of preferred scheme, the scope of described angle is 25 °-35 °.

As a kind of preferred scheme, described angle is 30 °.

As a kind of preferred scheme, described the first lever and the second lever are that plastic material is made.

Adopted after technique scheme, effect of the present invention is: because the outline line of the first cutting edge and the second cutting edge is arc and is arranged symmetrically with, the first cutting edge is all identical with the angle of the second cutting edge between the tangent line of arbitrary joining, therefore, when clipped position changes, the direction of the power that clipped position is received is vertical with the tangent line of joining, because the angle between tangent line is constant, thereby at present conventional scissors the first cutting edge and the angle between the second cutting edge diminish, take same joining as example, the corresponding arm of force of power of the present invention is shorter than the arm of force of conventional scissors, thereby more laborsaving.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is the structural representation of prior art;

Fig. 2 is structural representation during another clipped position in prior art;

Fig. 3 is the structural representation of the closure state of the embodiment of the present invention;

Fig. 4 is the structural representation of the open configuration of the embodiment of the present invention;

Fig. 5 is structural representation during another clipped position in the embodiment of the present invention;

Fig. 6 is the force analysis schematic diagram of Fig. 5;

In accompanying drawing: 1. the first halfbody 1; 11. first levers 11; 12. first cutter heads 12; 121. first cutting edges 121; 122. first tangent lines 122; 2. the second halfbody 2; 21. second levers 21; 22. second cutter heads 22; 221. second cutting edges 221; 222. second tangent lines 222; 3. hinge 3; The 122 ' first edge direction line 122 '; 222 '. the second edge direction line 222 '; The 223. new arm of forces; 223 '. the former arm of force 223 '.

The specific embodiment

Below by specific embodiment, the present invention is described in further detail.

As Fig. 1, 2 have represented a kind of scissors of commonly using at present, it comprise cooperatively interact and middle part by hinged the first halfbody 1 and the second halfbody 2 of hinge 3, described the first halfbody 1, the second halfbody 2 afterbody be respectively arranged with the first lever 11 and the second lever 21, the head of the first halfbody 1 and the second halfbody 2 is respectively arranged with the first cutter head 12 and the second cutter head 22, the first cutter head 12 is to be provided with the first cutting edge 121 in a side of contiguous the second cutter head 22, the second cutter head 22 is provided with the second cutting edge 221 in a side of contiguous the first cutter head 12 again, the first cutting edge 121 and the second cutting edge 221 are linear pattern cutting edge.As shown in Figure 1, angle during this clipped position between the first cutting edge 121 second cutting edges 221 is 30 °, as best initial shear position.And represented clipped position is farther from pin joint in Fig. 2, therefore the angle between the first cutting edge 121 and the second cutting edge 221 is just reduced into 17 °.While clearly, now shearing object, the required power applying will obviously be greater than the required power applying of best initial shear position.And the power difference that the clipped position of best initial shear position and least significant end applies is more obvious.

As shown in Figures 3 to 5, the structure of describing in structure in the present embodiment embodiment and Fig. 1,2 is basic identical, its difference is that the outline line of the first cutting edge 121 and the second cutting edge 221 is arc and is arranged symmetrically with, and the first cutting edge 121 is all identical with the angle of the second cutting edge 221 between the tangent line of arbitrary joining.Wherein, the preferred scope of this angle is 25 °-35 ° and further described angle is 30 ° of the bests.Described the first lever 11 and the second lever 21 are made for plastic material, certainly, can be also other any materials.

As shown in Figure 6, the adaptive force analysis situation of having explained when scissors is in same clipped position with current conventional scissors in the present embodiment in this figure.Due in same clipped position, so no matter be the scissors of existing scissors and the present embodiment, opening angle between the first lever 11 and the second lever 21 is identical, and the power that applies that the first lever 11, the second lever 21 are received so equates with respect to the arm of force of pin joint.And in the present embodiment, the first cutting edge 121 is set as the first tangent line 122 with the corresponding tangent line in this position, the second cutting edge 221 tangent line corresponding with this position is set as the second tangent line 222, so, the stressed of the first cutter head 12 in the present embodiment scissors of take is example, the shearing force F being subject to when this clipped position is vertical with the first tangent line 122, and this power F is the new arm of force 223 with respect to the arm of force of pin joint so; And in conventional scissors, the shearing force F ' that clipped position is subject to is vertical with the first edge direction line 122 ' (the shearing force F ' of the second halfbody 2 is vertical with the second edge direction line 222 ') of this scissors, this power F ' is the former arm of force 223 ' with respect to the arm of force of pin joint.Clearly, the new arm of force 223 is less than the length of the former arm of force 223 ', so because principle of moment balance is known, scissors in the present embodiment and conventional scissors, the power that applies that the first lever 11 applies all equates with the product of the corresponding arm of force, and the new arm of force 223 is less than the former arm of force 223 ', F > F ' so, thereby, when shearing, can shear sooner, in like manner backstepping can obtain, when required shearing force F is identical with F ', the required power of applying of the first lever 11 in the present embodiment is less than conventional scissors the first lever 11 power that applies, thereby reaches labour-saving object.

Claims

1. a scissors, comprise and cooperatively interacting and the first halfbody and the second halfbody that middle part is hinged, described the first halfbody, the second halfbody afterbody be respectively arranged with the first lever and the second lever, the head of the first halfbody and the second halfbody is respectively arranged with the first cutter head and the second cutter head, the first cutter head is to be provided with the first cutting edge in a side of contiguous the second cutter head, the second cutter head is provided with the second cutting edge in a side of contiguous the first cutter head again, it is characterized in that: the outline line of the first cutting edge and the second cutting edge is arc and is arranged symmetrically with, the first cutting edge is all identical with the angle of the second cutting edge between the tangent line of arbitrary joining.

2. a kind of scissors as claimed in claim 1, is characterized in that: the scope of described angle is 25 °-35 °.

3. a kind of scissors as claimed in claim 2, is characterized in that: described angle is 30 °.

4. a kind of scissors as claimed in claim 3, is characterized in that: described the first lever and the second lever are that plastic material is made.