阅读说明：本技术 一种虾剪 (Shrimp scissors ) 是由 龙泽良 龙川 于 2021-04-07 设计创作，主要内容包括：本发明涉及食品加工的技术领域,具体涉及一种虾剪,包括上剪刀部,下剪刀部,上剪刀安装部固定有上夹紧支架,下剪刀安装部固定有下夹紧支架,下剪刀部固定有右外圆环,还包括有内夹旋转机构,使用时,用上夹紧支架和下夹紧支架固定虾尾的前部,采用内夹旋转机构固定虾尾的中扇部,相对人手握住虾身而言更加稳固,同时旋转内夹旋转机构,能更好的将尾部的中扇处扭断,中扇门与虾线连接于一体,更方便的取出虾线,操作简单,提高了效率和保证了小龙虾的预处理效果,解决了现去掉虾线却没有可以利用的工具,通常的方法通常都是采用人手来处理,工作效率低,耗费时间长的问题。(The invention relates to the technical field of food processing, in particular to a pair of shrimp scissors, which comprises an upper scissor part and a lower scissor part, wherein an upper clamping support is fixed on an upper scissor mounting part, a lower clamping support is fixed on a lower scissor mounting part, a right outer circular ring is fixed on the lower scissor part, and an inner clamping rotating mechanism is also arranged, when in use, the front part of a shrimp tail is fixed by the upper clamping support and the lower clamping support, a middle fan part of the shrimp tail is fixed by the inner clamping rotating mechanism, the middle fan part is more stable compared with the situation that a human hand holds the shrimp body, meanwhile, the middle fan part at the tail can be better twisted off by rotating the inner clamping rotating mechanism, a middle fan door is connected with a shrimp wire into a whole, the shrimp wire is more conveniently taken out, the operation is simple, the efficiency is improved, the pretreatment effect of the crayfish is ensured, no available tool is used when the shrimp wire is removed, the common method usually adopts the human hand to treat, and the problem of long time consumption.)

1. The utility model provides a shrimp scissors, includes scissors piece, lower scissors piece and first installation round pin axle, it includes scissors installation department and last scissors back handle portion to go up the scissors piece, it is provided with the mounting hole to go up between scissors installation department and the last scissors back handle portion, the scissors piece includes down scissors installation department and lower scissors back handle portion down, be provided with down the mounting hole down between scissors installation department and the lower scissors back handle portion down, go up the scissors piece, down the scissors piece passes through first installation round pin axle last mounting hole with lower mounting hole hinged joint together, its characterized in that:

an upper clamping support is fixed on the left surface of the upper scissors mounting part along the direction vertical to the surface of the upper scissors blade, an upper scissors blade clamping groove is formed in the position, corresponding to the upper clamping support, of the upper scissors mounting part, a lower clamping support is fixed on the left surface of the lower scissors mounting part along the direction vertical to the surface of the lower scissors blade, a lower scissors blade clamping groove is formed in the position, corresponding to the lower clamping support, of the lower scissors mounting part, and a right outer circular ring is fixed on the right surface of the lower scissors mounting part along the direction vertical to the surface of the lower scissors blade;

the inner clamp rotating mechanism comprises an inner rotating ring, a lower rotating clamping block and an upper rotating clamping block, the inner rotating ring is sleeved in the right outer ring, and the outer ring of the inner rotating ring is mutually matched with the inner ring of the right outer ring in a rotating manner;

the left end of the lower rotating clamping block sequentially penetrates through the inner part of the inner rotating ring and the lower shear blade clamping groove from right to left, and a lower pin hole is formed in the right end of the lower rotating clamping block; the lower rotating clamping block is fixedly connected with the inner rotating ring;

the left end of the upper rotating clamping block sequentially penetrates through the inner part of the inner rotating ring and the upper shear blade clamping groove from right to left, an upper pin hole is formed in the right end of the upper rotating clamping block, and the upper rotating clamping block further comprises a second pin shaft which penetrates through the lower pin hole and the upper pin hole to movably connect the lower rotating clamping block and the upper rotating clamping block together through a hinge;

the upper clamping support and the lower clamping support clamp the shrimp tails when the upper shear blade and the lower shear blade are in a closed state; the lower rotary clamping block and the upper rotary clamping block clamp the shrimp tail fan part when the upper shear blade and the lower shear blade are in a closed state.

2. A shrimp clipper as set forth in claim 1, wherein: the rotary clamping block resetting compression spring is fixed between the lower rotary clamping block and the upper rotary clamping block and is in a pre-compression state.

3. A shrimp clipper as set forth in claim 1, wherein: the rotary clamping block is characterized in that a rotary handle is further fixed on the inner rotary ring or the lower rotary clamping block, the rotary handle radially and outwards extends along the inner rotary ring, a rotary clamping groove is formed in the right part of the right outer ring, and the rotary handle is in limited movement in the rotary clamping groove.

4. A shrimp clipper as claimed in claim 3, wherein: the shear comprises a lower shear blade and a right outer circular ring, and is characterized by further comprising a rotating handle return tension spring, wherein one end of the rotating handle return tension spring is fixed on the rotating handle, and the other end of the rotating handle return tension spring is fixed on the lower shear blade or the right outer circular ring and is in a pre-tensioning state.

5. A shrimp clipper as set forth in claim 1, wherein: two notch positioning blades are arranged on the front side and the rear side of the left end of the upper rotating clamping block, and the two notch positioning blades are cut into the middle fan part of the shrimp tail fan part when the upper scissors blade and the lower scissors are in a closed state.

6. A shrimp clipper as set forth in claim 1, wherein: the left end of the upper clamping support is at least provided with a back cutting knife which is arranged along the direction vertical to the surface of the upper shear blade, and when the upper shear blade and the lower shear blade are in a closed state, the back cutting knife cuts the patterns on the back of the shrimps.

7. A shrimp clipper as set forth in claim 1, wherein: and an arc-shaped bayonet matched with the radian of the tail of the shrimp is arranged on the upper clamping support.

8. A shrimp clipper as set forth in claim 2, wherein: the inner side surface of the lower rotary clamping block and the inner side surface of the upper rotary clamping block are respectively provided with a pressure spring mounting hole in corresponding positions, and two ends of the reset pressure spring of the rotary clamping block are respectively installed in the pressure spring mounting holes in a matched mode.

9. A shrimp clipper as set forth in claim 2, wherein: when the upper shear blade and the lower shear blade are in a closed state, the upper shear blade clamping groove and the lower shear blade clamping groove are matched to form a circular clamping groove, the left end of the lower rotary clamping block and the left end of the upper rotary clamping block are matched to form a cylindrical clamping block, and the section circle of the circular clamping groove and the section circle of the cylindrical clamping block are concentric circles.

10. A shrimp clipper as set forth in claim 1, wherein: the inner ring at the right end of the right outer circular ring is provided with an inner clamping groove, the inner rotating circular ring is sleeved at the left end of the inner clamping groove, the inner blocking ring is clamped in the inner clamping groove, and the inner rotating circular ring is axially fixed through the inner blocking ring.

Technical Field

The invention relates to the technical field of food processing, in particular to a pair of shrimp scissors which is particularly suitable for pretreatment of crayfish.

Background

At present, the domestic crayfish market sells the fire explosion, and the crayfish industry gradually forms a complete industrial chain which integrates seed breeding, healthy breeding, processing and circulation, catering and festival celebration. The crayfish consists of 20 individual joints of the head, the chest and the abdomen, the body surface of the crayfish has a hard crust, the tail part of the crayfish is a tail fan, and the tail fan usually comprises a middle fan and side fans positioned at two sides of the middle fan; belongs to the phylum arthropoda, is invertebrate in the body, has an intestinal canal which is a thin crawfish line, has the anus at the tail part positioned on a middle fan, and usually needs to remove the crawfish line and the head part when eating the pretreated crawfish. At present, the head of the crayfish is usually removed by common scissors, the scissors comprise an upper scissor piece, a lower scissor piece and a first mounting pin shaft, the upper scissor piece comprises an upper scissor front blade part, an upper scissor mounting part and an upper scissor rear handle part, an upper mounting hole is arranged between the upper scissor mounting part and the upper scissor rear handle part, the lower scissor piece comprises a lower scissor front blade part, a lower scissor mounting part and a lower scissor rear handle part, a lower mounting hole is arranged between the lower scissor mounting part and the lower scissor rear handle part, the upper scissor piece and the lower scissor piece penetrate through the upper mounting hole and the lower mounting hole to be hinged together by the first mounting pin shaft, the head of the crayfish can be cut by utilizing the closing and the opening between the common upper scissor front blade part and the lower scissor front blade part, but no tool can be utilized when the crayfish line is removed, the conventional method adopts hands to treat the crawfish, namely, the left hand tightly holds the crawfish body, the right hand holds the middle fan of the crawfish to pull the middle fan apart or apart together with the crawfish line, and the crawfish is generally treated in a survival state.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the crayfish shears which adopt a semi-mechanical mode, solve the problems of troublesome operation and low efficiency when a crayfish line is removed by adopting a manual mode in the prior art, and better ensure the pretreatment effect of crayfish.

In order to solve the technical problem, the shrimp shears comprise an upper shear blade, a lower shear blade and a first mounting pin shaft, wherein the upper shear blade comprises an upper shear mounting part and an upper shear rear handle part, an upper mounting hole is formed between the upper shear mounting part and the upper shear rear handle part, the lower shear blade comprises a lower shear mounting part and a lower shear rear handle part, a lower mounting hole is formed between the lower shear mounting part and the lower shear rear handle part, the upper shear blade and the lower shear blade penetrate through the upper mounting hole and are hinged with the lower mounting hole through the first mounting pin shaft, an upper clamping support is fixed on the left surface of the upper shear mounting part along the direction vertical to the surface of the upper shear blade, an upper shear blade clamping groove is formed in the position of the upper shear mounting part corresponding to the upper clamping support, and a lower clamping support is fixed on the left surface of the lower shear mounting part along the direction vertical to the surface of the lower shear blade, the lower scissors mounting part is provided with a lower scissors blade clamping groove at a position corresponding to the lower clamping support, the right surface of the lower scissors mounting part is fixedly provided with a right outer circular ring along a direction vertical to the surface of the lower scissors blade, and the lower scissors mounting part further comprises an inner clamp rotating mechanism, the inner clamp rotating mechanism comprises an inner rotating circular ring, a lower rotating clamping block and an upper rotating clamping block, the inner rotating circular ring is sleeved in the right outer circular ring, and the outer ring of the inner rotating circular ring is mutually and rotatably matched with the inner ring of the right outer circular ring; the left end of the lower rotating clamping block sequentially penetrates through the inner part of the inner rotating ring and the lower shear blade clamping groove from right to left, and a lower pin hole is formed in the right end of the lower rotating clamping block; the lower rotating clamping block is fixedly connected with the inner rotating ring; the left end of the upper rotating clamping block sequentially penetrates through the inner part of the inner rotating ring and the upper shear blade clamping groove from right to left, an upper pin hole is formed in the right end of the upper rotating clamping block, and the upper rotating clamping block further comprises a second pin shaft which penetrates through the lower pin hole and the upper pin hole to movably connect the lower rotating clamping block and the upper rotating clamping block together through a hinge; the upper clamping support and the lower clamping support clamp the shrimp tails when the upper shear blade and the lower shear blade are in a closed state; the lower rotary clamping block and the upper rotary clamping block clamp the shrimp tail fan part when the upper shear blade and the lower shear blade are in a closed state.

When the shrimp scissors adopting the technical scheme are used for processing shrimp wires, the crayfishes are usually held by the left hand, the backs of the crayfishes are upward, the scissors are held by the right hand in the vertical direction, the handles of the scissors are arranged behind, and the planes of the scissors are in the vertical direction. When the scissors are in an initial state, the upper scissors mounting part and the lower scissors mounting part are in an opening state, namely, the upper clamping bracket, the lower clamping bracket, the left end of the lower rotating clamping block and the left end of the upper rotating clamping block are in an opening state, at the moment, the inner surface of the lower rotating clamping block is parallel to the lower scissors, and a certain gap is formed between the inner surface of the upper rotating clamping block and the inner surface of the lower rotating clamping block. During operation, the tail of the crayfish is firstly plugged into a gap between the left end of the lower rotating clamping block and the left end of the upper rotating clamping block from left to right by using the left hand, then the scissors are held by the handle of the right hand to grasp the scissors, at the moment, the front part of the crayfish tail of the crayfish is clamped by the upper clamping support and the lower clamping support, the middle fan of the tail of the crayfish is clamped by the left end of the lower rotating clamping block and the left end of the upper rotating clamping block, then the inner rotating ring is rotated for a certain angle in the right outer ring, the middle fan of the crayfish is pinched by a hand and is twisted off, finally the crayfish is held by the left hand to pull out the crayfish line towards left, and therefore the pretreatment of removing the crayfish line is completed quickly.

By adopting the shrimp scissors, the front parts of the shrimp tails are fixed by the upper clamping support and the lower clamping support, the middle fan parts of the shrimp tails are fixed by the left end of the lower rotary clamping block and the left end of the upper rotary clamping block, the shrimp scissors are more stable relative to the holding of the shrimp bodies by hands, and meanwhile, the internal clamp rotary mechanism is rotated, and the middle fan parts of the lobsters and the shrimp wires are connected into a whole, so that the middle fan parts of the tail parts can be better twisted off, the shrimp wires can be more conveniently taken out, the operation is simple, the efficiency is improved, and the pretreatment effect of the crayfishes is ensured.

Furthermore, the technical scheme of the shrimp shears is that the shrimp shears further comprise a rotary clamping block return pressure spring, and the rotary clamping block return pressure spring is fixed between the lower rotary clamping block and the upper rotary clamping block and is in a pre-compression state. By adopting the reset spring in the pre-compression state, when the handle of the scissors is released by the right hand, the upper scissors mounting part and the lower scissors mounting part are in the open initial state under the action of the reset pressure spring of the rotary clamping block, namely, the left ends of the upper clamping bracket, the lower rotary clamping block and the upper rotary clamping block are in the open state.

Further inject the concrete mounting means of rotatory clamp splice pressure spring that resets for down rotate the clamp splice with last rotatory clamp splice medial surface corresponding position be provided with the pressure spring mounting hole respectively, this position that corresponds is located usually down rotate the clamp splice with the centre of last rotatory clamp splice medial surface lean on right position on, rotatory clamp splice reset pressure spring both ends respectively the cooperation install in the pressure spring mounting hole, this kind of mounting means is simple convenient stable, does not influence the space of stuffing in of the afterbody of crayfish simultaneously.

In addition, for more convenient rotatory interior clamp rotary mechanism, inject on the internal rotation ring or lower rotatory clamp splice still be fixed with twist grip, twist grip radially outwards extends along the internal rotation ring, the right part of right excircle ring is provided with rotatory draw-in groove, twist grip spacing removal in rotatory draw-in groove. The inner clamp rotating mechanism with the handle is equivalent to the inner clamp rotating mechanism which is additionally provided with a lever in a rotating direction, the lever operating principle is utilized, the operation is more convenient and labor-saving, meanwhile, the right part of the right outer circular ring is provided with the rotating clamping groove to limit the rotating angle of the rotating handle, the moving process of the rotating handle is the process of twisting off the middle fan section of the crayfish, the middle fan section of the twisted crayfish only needs to rotate within a certain angle, the circumferential rotation is not needed, but the small angle rotation cannot be achieved, and therefore the effect of pre-treating the crayfish wires can be better ensured by limiting the rotating angle of the rotating handle through the rotating clamping groove.

Furthermore, in the above technical solution, the shrimp shears further includes a rotating handle return tension spring, one end of the rotating handle return tension spring is fixed on the rotating handle, and the other end of the rotating handle return tension spring is fixed on the lower shear blade or the right outer circular ring and is in a pre-tensioned state. By adopting the rotary handle reset tension spring in the pre-tensioning state, the hand can be better ensured to be loosened after the rotary handle is rotated to a certain limited position, and the rotary handle reset tension spring automatically restores to the initial state under the action of the tension force of the rotary handle reset tension spring, namely, the upper clamping support and the lower clamping support as well as the left end of the lower rotary clamping block and the left end of the upper rotary clamping block are in the opening state, so that the next crayfish can be conveniently treated.

Considering that the crayfish has certain difference in size, when the crayfish tail is inserted into the gap between the left end of the lower rotating clamping block and the left end of the upper rotating clamping block, more small crayfish tails can be inserted, and less large crayfish tails can be inserted, and the crayfish tail is clamped to the other part of the crayfish tail except the middle fan, the middle fan and the crayfish tail of the crayfish tail are cut, so that two notch positioning blades are arranged on the front side and the rear side of the left end of the upper rotating clamping block, the two notch positioning blades are cut into the middle fan part of the crayfish tail fan part when the upper shear blade and the lower shear blade are in a closed state, the notch positioning blades can better ensure that the middle fan part of the crayfish tail is completely separated from the crayfish tail, then the middle fan can be better twisted off under the condition of rotation, the crayfish wire is pulled out, and simultaneously, the other tail fan parts except the middle fan are not twisted off, the integrity and the aesthetic property of the shrimp tails are ensured to the maximum extent.

In addition, considering that the body surface of the crayfish has a hard shell, when eating, in order to have a better taste, one or more than one flower knife is/are required to be arranged on the back of the crayfish, and at least one back cutting knife is arranged at the left end of the upper clamping support, the back cutting knife is arranged along the direction vertical to the surface of the upper shear blade, because in the technical scheme, the lower clamping support supporting and clamping the belly of the crayfish is higher (longer extending towards the left end) than the upper clamping support supporting and clamping the back of the crayfish, the back cutting knife can stably support the back cutting knife and the flower knife, when the upper shear blade and the lower shear blade are in a closed state, the back cutting knife cuts the flower knife from the back of the crayfish to the front, one flower knife edge is arranged by the back cutting knife, two flower knife edges are simultaneously arranged by the two back cutting knives, and the flower cutting knife aims of cutting the shell on the back of the crayfish, when cooking, the better entering shrimp meat of taste is just right, so cut the back of the body sword and can not set up too deeply and overlength, set up suitable degree of depth and length can cut the crust at crayfish back can, can not cut into too deeply and lead to cutting off crayfish, simultaneously, cut the back of the body sword and cut under the initial state at the shrimp, the certain suitable angle of tool bit upwards syncline, form the big V-arrangement mouth of opening below the opening of the face, under the initial state, conveniently pack the afterbody direction of crayfish into the clearance department that presss from both sides tight support and lower clamp support on the one hand, on the other hand also can be better guarantee to cut the back of the body sword and cut into the shrimp depth unanimous basically around.

Furthermore, an arc-shaped bayonet matched with the radian of the tail of the shrimp is arranged on the upper clamping support. The crayfish clamping device is characterized in that the tail part of the crayfish is usually in an arc shape at the back part, the belly part of the crayfish is in a flat shape, and when the tail part of the crayfish is plugged into a gap between the upper clamping support and the lower clamping support by the left hand, the back part of the crayfish in the arc shape is in contact with the upper clamping support, so that the arc-shaped bayonet matched with the radian of the tail part of the crayfish is arranged on the upper clamping support, and the tail part of the crayfish can be clamped better by.

In addition, in order to guarantee that lower rotating clamp splice and upper rotating clamp splice can both press from both sides tight shrimp tail all the time at rotatory in-process, when injecing last scissor piece and lower scissor piece closed condition, last scissor piece draw-in groove with lower scissor piece draw-in groove cooperate and become a circular draw-in groove, the left end of lower rotating clamp splice with the left end cooperation of last rotating clamp splice becomes a cylindrical clamp splice, the cross-sectional circle of circular draw-in groove with the cross-sectional circle of cylindrical clamp splice is the concentric circles, and the position of rotatory process centre gripping can not be guaranteed to this kind of concentric circles structure and has moved, has better guaranteed the state of pressing from both sides tightly.

In addition, in the technical scheme, the internal rotation ring is sleeved in the right outer ring and is axially fixed, the shrimp scissors are limited to further comprise an internal blocking ring, an internal clamping groove is formed in the inner ring at the right end of the right outer ring, the internal rotation ring is sleeved at the left end of the internal clamping groove, the internal blocking ring is clamped in the internal clamping groove, and the internal rotation ring is axially fixed through the internal blocking ring.

Finally, considering that the head of the crawfish can be cut off by the same pair of scissors after the crawfish is processed, the upper scissors blade is limited to further comprise an upper scissors front blade part which is fixedly connected to the front end of the upper scissors mounting part; the lower shear blade further comprises a lower shear front blade part which is fixedly connected with the front end of the lower shear mounting part. The front knife edge part of the existing scissors can well solve the problem of pretreatment of removing the head of the crayfish.

Compared with the existing crayfish body held by hands, the crayfish scissors provided by the invention can more firmly hold the tail of the crayfish, can more conveniently remove the crayfish line and the crayfish head, improves the efficiency and ensures the pretreatment effect of the crayfish.

Drawings

FIG. 1 is a front perspective view of the shrimp clipper of the present invention in its initial state;

FIG. 2 is a rear perspective view of the shrimp clipper of the present invention in its initial state;

fig. 3 is a schematic front view of the upper cutting blade according to the present invention;

fig. 4 is a schematic view of the back of the upper cutting blade according to the present invention;

FIG. 5 is a schematic bottom view of FIG. 3;

FIG. 6 is a schematic front view of the lower cutting blade according to the present invention;

FIG. 7 is a schematic view of the back of the lower cutting blade according to the present invention;

FIG. 8 is a schematic top view of FIG. 6;

FIG. 9 is a schematic perspective view of the inner rotating ring and the right outer ring of the present invention;

FIG. 10 is a schematic perspective view of the right outer ring of the present invention;

fig. 11 is a schematic perspective view of an inner clamp rotating mechanism according to the present invention;

FIG. 12 is a schematic perspective view of the assembled lower rotating block and upper rotating block according to the present invention;

FIG. 13 is a schematic perspective view of a lower rotating block according to the present invention;

FIG. 14 is a schematic perspective view of an upper rotating clamp block according to the present invention;

fig. 15 is a schematic perspective view of an inner rotating ring according to the present invention.

The designations in the figures correspond respectively to:

1-upper scissors blade, 11-upper scissors front blade part, 12-upper scissors mounting part, 121-upper clamping bracket, 122-arc bayonet, 13-upper scissors rear handle part, 14-upper mounting hole and 15-upper scissors blade clamping groove;

2-lower scissors blade, 21-lower scissors front blade part, 22-lower scissors mounting part, 221-lower clamping support, 23-lower scissors rear handle part, 231-rotary clamping groove, 24-lower mounting hole and 25-lower scissors blade clamping groove; 223-right outer circular ring, 224-inner clamping groove, 225 inner retaining ring;

31-inner rotating ring, 32-lower rotating clamping block, 321-lower pin hole, 33-upper rotating clamping block and 331-upper pin hole; 34-a second pin;

6-rotating the clamping block to reset the pressure spring, and mounting holes for the pressure spring 61; 7-rotating the handle; 71-rotating the handle return tension spring; 8-a notch positioning blade; 9-back knife cutting;

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained in the following with the accompanying drawings and the specific embodiments.

Example (b):

as shown in fig. 1 to 15, a pair of shrimp shears comprises an upper shear blade 1, a lower shear blade 2 and a first mounting pin shaft, wherein the upper shear blade 1 comprises an upper shear front blade part 11, an upper shear mounting part 12 and an upper shear rear handle part 13, and an upper mounting hole 14 is formed between the upper shear mounting part 12 and the upper shear rear handle part 13; the lower shear blade 2 comprises a lower shear front blade part 21, a lower shear mounting part 22 and a lower shear rear handle part 23, a lower mounting hole 24 is arranged between the lower scissors mounting part 22 and the lower scissors rear handle part 23, the upper shear blade 1 and the lower shear blade 2 are hinged together through a first mounting pin shaft passing through the upper mounting hole 14 and the lower mounting hole 24, an upper clamping bracket 121 is fixed on the left surface of the upper scissors mounting part 12 along the direction vertical to the surface of the upper scissors blade, an upper shear blade clamping groove 15 is arranged at the position of the upper shear mounting part 12 corresponding to the upper clamping bracket 121, a lower clamping bracket 221 is fixed to the left surface of the lower scissor mounting part 22 along a direction vertical to the surface of the lower scissor blade, a lower shear blade clamping groove 25 is arranged at the position of the lower shear mounting part 22 corresponding to the lower clamping bracket 221, a right outer circular ring 223 is fixed on the right surface of the lower scissors mounting part 22 along the direction vertical to the surface of the lower scissors blade; the inner clamp comprises an inner clamp rotating mechanism, the inner clamp rotating mechanism comprises an inner rotating ring 31, a lower rotating clamping block 32, an upper rotating clamping block 33 and a rotating clamping block resetting pressure spring 6, and the rotating clamping block resetting pressure spring 6 is fixed between the lower rotating clamping block 32 and the upper rotating clamping block 33 and is in a pre-compression state; and pressure spring mounting holes 61 are respectively formed in corresponding positions of the inner side surface of the lower rotary clamping block 32 and the inner side surface of the upper rotary clamping block 33, and two ends of the rotary clamping block resetting pressure spring 6 are respectively installed in the pressure spring mounting holes 61 in a matching manner. The inner rotating ring 31 is sleeved in the right outer ring 223, and the outer ring of the inner rotating ring 31 is mutually matched with the inner ring of the right outer ring 223 in a rotating way; the shear blade fixing device further comprises an inner blocking ring 225, an inner clamping groove 224 is formed in an inner ring at the right end of the right outer circular ring 223, the inner rotating circular ring 31 is sleeved at the left end of the inner clamping groove 224, the inner blocking ring 225 is clamped in the inner clamping groove 224, and the inner rotating circular ring 31 is axially fixed (namely, in a direction perpendicular to the lower shear blade) through the inner blocking ring 225.

The left end of the lower rotating clamping block 32 sequentially penetrates through the inner part of the inner rotating ring 31 and the lower shear blade clamping groove 25 from right to left, and a lower pin hole 321 is formed in the right end of the lower rotating clamping block 32; the lower rotating clamping block 32 is fixedly connected with the inner rotating ring 31; the left end of the upper rotating clamping block 33 sequentially penetrates through the inner part of the inner rotating ring 31 and the upper shear blade clamping groove 15 from right to left, an upper pin hole 331 is formed in the right end of the upper rotating clamping block 33, the upper rotating clamping block further comprises a second pin shaft 34, and the second pin shaft 34 penetrates through the lower pin hole 321 and the upper pin hole 331 to movably connect the lower rotating clamping block 32 and the upper rotating clamping block 33 together in a hinged mode; the upper clamping support 121 and the lower clamping support 221 clamp the shrimp tails when the upper shear blade 1 and the lower shear blade 2 are in a closed state; the lower rotary clamping block 32 and the upper rotary clamping block 33 clamp the shrimp tail fan part when the upper shear blade 1 and the lower shear blade 2 are in a closed state; when the upper shear blade 1 and the lower shear blade 2 are in a closed state, the upper shear blade clamping groove 15 and the lower shear blade clamping groove 25 are matched to form a circular clamping groove, the left end of the lower rotating clamping block 32 and the left end of the upper rotating clamping block 33 are matched to form a cylindrical clamping block, and the section circle of the circular clamping groove and the section circle of the cylindrical clamping block are concentric circles. The upper rotating clamp block 32 is fixed on the inner rotating ring 31 or the lower rotating clamp block 31, the rotating handle 7 extends outwards along the inner rotating ring 31 in the radial direction, the right portion of the right outer ring 23 is provided with a rotating clamping groove 231, the rotating handle 7 moves in the rotating clamping groove 231 in a limiting manner, the upper rotating clamp block further comprises a rotating handle return tension spring 71, one end of the rotating handle return tension spring 71 is fixed on the rotating handle 7, and the other end of the rotating handle return tension spring is fixed on the lower shear blade 2 or the right outer ring 223 and is in a pre-tensioning state. Two notch positioning blades 8 are arranged on the front side and the rear side of the left end of the upper rotating clamping block 33, and the two notch positioning blades 8 cut into the middle fan part of the shrimp tail fan part when the upper shear blade 1 and the lower shear blade 2 are in a closed state; at least one back cutting knife 9 is arranged at the left end of the upper clamping support 121, the back cutting knife 9 is arranged along the direction vertical to the surface of the upper shear blade, and when the upper shear blade 1 and the lower shear blade 2 are in a closed state, the back cutting knife 9 cuts flower on the back of the shrimps; an arc-shaped bayonet 122 matched with the radian of the tail of the shrimp is arranged on the upper clamping support 121.

During manufacturing, firstly, an upper shear blade 1 provided with an upper clamping support 121 and an upper shear blade clamping groove 15 (wherein the upper clamping support 121 is provided with a back cutting knife 9, a cut positioning blade 8 and an arc-shaped bayonet 122) and a lower shear blade 2 provided with a lower clamping support 221 and a lower shear blade clamping groove 25 are manufactured, and then the upper shear blade 1 and the lower shear blade 2 are hinged together through a first mounting pin shaft penetrating through the upper mounting hole 14 and the lower mounting hole 24; then, the right outer circular ring 223 is installed at a proper position of the lower shear blade 2, the rotating circular ring 31 (provided with the rotating handle 7) is sleeved on the right outer circular ring 223, the right side of the right outer circular ring 223 is provided with the rotating clamping groove 231, so that the sleeving of the rotating circular ring 31 (provided with the rotating handle 7) is not influenced, then the manufactured lower rotating clamping block 32 and the upper rotating clamping block 33 penetrate through the lower pin hole 321 and the upper pin hole 331 through the second pin shaft 34 to movably connect the lower rotating clamping block 32 and the upper rotating clamping block 33 together in a hinge mode, then the rotating clamping block resetting pressure spring 6 is pressed in the pressure spring installation hole, the rotating clamping block resetting pressure spring 6 is fixed between the lower rotating clamping block 32 and the upper rotating clamping block 33 and is in a pre-compression state, and then the left end of the assembled lower rotating clamping block 32 and the left end of the upper rotating clamping block 33 penetrate through the inner rotating circular ring 31 (provided with the rotating handle 7) from right to left, The upper shear blade clamping groove 15 (or the lower shear blade clamping groove 25), the inner blocking ring 225 is clamped into the inner clamping groove of the right outer circular ring 223, finally, one end of the rotating handle resetting tension spring 71 is hung on the rotating handle 7, the other end of the rotating handle resetting tension spring is hung on the lower shear blade 2 or the right outer circular ring 223, and the rotating handle resetting tension spring 71 is in a pre-tensioning state. Therefore, the shrimp shears are assembled, at the moment, the shears are in an initial state, the upper shear mounting part and the lower shear mounting part are in an opening state at the position of the rotary clamping block resetting compression spring 6, namely, the upper clamping support 121, the lower clamping support 221, the left end of the lower rotary clamping block 32 and the left end of the upper rotary clamping block 33 are in an opening state, and the rotary handle 7 moves in the rotary clamping groove 231 in a limiting mode.

When the shrimp scissors adopting the technical scheme are used for processing shrimp wires, the crayfishes are usually held by the left hand, the backs of the crayfishes are upward, the scissors are held by the right hand in the vertical direction, the handles of the scissors are arranged behind, and the planes of the scissors are in the vertical direction. When the scissors are in an initial state, the upper scissors mounting part and the lower scissors mounting part are in an open state, namely the upper clamping support 121 and the lower clamping support 221 as well as the left end of the lower rotating clamping block 32 and the left end of the upper rotating clamping block 33 are in an open state, the tail part of the crawfish is firstly inserted into a gap between the left end of the lower rotating clamping block 32 and the left end of the upper rotating clamping block 33 from the left to the right by using the left hand, then the scissors are held at the scissors handle (the upper scissors blade 1 and the lower scissors blade 2 are in a closed state), at the moment, the upper clamping support 121 and the lower clamping support 221 are folded to clamp the front part of the crawfish tail, the left end of the lower rotating clamping block 32 and the left end of the upper rotating clamping block 33 are folded to clamp the middle fan part of the tail part of the crawfish, the two positioning blades 8 for cutting into the middle fan part of the crawfish tail part, then the rotating handle 7 of the inner clamping block is rotated by using the left hand, and the rotating mechanism, the inner rotating ring 31 rotates in the right outer ring 223 for a certain angle, at this time, the rotating clamping block return compression spring 6 is in a compressed state, and the rotating handle return tension spring 71 is in a stretched state; after the rotation, the middle fan of the tail fan of the crayfish is cut off, which is equivalent to that the middle fan of the crayfish is pinched by hands and the middle fan is twisted off accurately, then, after the left hand loosens the rotating handle 7, the crayfish body is held to the left, the right hand keeps the scissors closed state (the middle and tail fans of the crayfish are still clamped), and the pretreatment of removing the crayfish threads can be completed quickly; then the head of the crayfish is cut off by the upper scissors front blade part 11 and the lower scissors front blade part 21 of the scissors, and the pretreatment of the head of the crayfish is completed.

According to the shrimp scissors, the upper clamping support 121 and the lower clamping support 221 are adopted to fix the front parts of the shrimp tails, the left end of the lower rotating clamping block 32 and the left end of the upper rotating clamping block 33 are adopted to fix the middle fan parts of the shrimp tails, the shrimp scissors are more stable compared with the situation that the shrimp bodies are held by hands, meanwhile, the inner clamping rotating mechanism is rotated, the middle fan parts at the tail parts can be better twisted off, the shrimp wires can be more conveniently taken out, the shrimp heads can be cut off, the operation is simple, the efficiency is improved, and the pretreatment effect of the crayfish is ensured.

The foregoing description of the preferred embodiments is provided to facilitate the understanding of the method and its core concepts, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention and the scope of the appended claims.