CN112425574A

CN112425574A - Torsion ejection type expansion fishhook

Info

Publication number: CN112425574A
Application number: CN202011321135.XA
Authority: CN
Inventors: 方体寅
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-03-02
Anticipated expiration: 2040-11-23
Also published as: CN112425574B

Abstract

The invention discloses a torsion ejection type expansion fishhook, which comprises a fishhook, a fishhook driving cylinder, an expansion rod, a reed and a shifting piece, wherein the four-step copying extending method of hooking, ejecting, cutting and picking is ingeniously utilized, a fishhook with larger size is triggered to pop out along the width direction parallel to a fishmouth when a fish bites the tail of the torsion ejection type expansion fishhook, so that the fishhook is favorable for preventing the fish from spitting the fishhook, the fishhook rotates to be vertical to the width direction of the fishmouth after extending into the fishmouth, the tail is triggered to expand and pop out relative to the fishhook at the same time, the fishhook is effectively prevented from being disengaged, the structure of the tail of two sides is favorable for hanging the fishhook, the fishhook can be prevented from sliding out and hanging empty, a safety latch is arranged on a pressure rod connected with the tail, and the safety latch can be stirred to avoid false triggering and prevent the. The fishing efficiency of the fishhook of the invention is 100%.

Description

Torsion ejection type expansion fishhook

Technical Field

The invention relates to the technical field of fishing tools, in particular to a torsion ejection type expansion fishhook.

Background

The fishhook is a key part in the fishing gear, and the quality and the structural specification of the fishhook directly influence the fish rate. At present, most fishhooks used by people are hook-shaped single-hook or double-hook fishhooks, and have the defects of easy unhooking and fish running, bait-carrying hook sediment hooking and the like.

The traditional fishhook is also named as a slow hook, is mostly a J-shaped single hook, mainly depends on experience, will and technology of a fisher during fishing, requires the fisher to have at least the judging capability of seeing float and knowing when the fishhook starts, and can hook the mouth of the fish only by immediately tensioning a fish line when the fish swallows the hook, and for most fishers, especially beginners, the condition of fish biting is difficult to judge, and as a result, the bait is usually eaten, and the fish is taken off the hook.

CN105379690A discloses an expanding type fish hook, when a fish bites the fish hook with bait, the mouth of the fish swallows and presses the pinching part on the body of the fish hook and the pinching part on the corresponding expanding rod, so that the buckle at the end of the hook is disengaged, and under the action of the torsion spring at one end of the expanding rod, the hook expands towards both sides, thereby clamping the mouth of the fish. But this fishhook body and expansion pole are mutually carried on the back mutually, and fishhook body size can not be big, otherwise the fish is difficult to bite fishhook body and expansion pole simultaneously, because the hook point of J-shaped single hook is crooked in addition, the mouth of fish must wrap up hook point and expansion pole, when the expansion pole is bounced open, the hook point could hook the fish mouth, otherwise unhook easily, the device's couple one end and fishhook body fixed connection, the buckle that is provided with the lock expansion pole on the other end. The buckling depth of the buckling expansion rod is 0.5-2 times of the diameter value of the corresponding expansion rod. When a fish bites the expansion rod, the force of biting the bait is large enough to separate the buckle from the expansion rod. Therefore, although the device is designed skillfully, the problem of low fish-fish rate still exists.

Disclosure of Invention

The invention aims to solve the problems that the existing expansion type fishhook is difficult to expand, difficult to bite by fishes and easy to unhook.

The technical scheme adopted by the invention for solving the technical problems is as follows: a torque ejection type expansion fishhook, which comprises a fishhook, a fishhook driving cylinder, an expansion rod, a reed and a shifting piece,

the reed is U-shaped, one end of the reed is fixed with the tail end of the fishhook driving cylinder, the other end of the reed is connected with the tail end of the expansion rod, the head end of the expansion rod is provided with a flanging bent towards the fishhook driving cylinder, when the expansion rod is pressed to be close to the fishhook driving cylinder, the flanging covers the head end of the fishhook driving cylinder, the flanging is provided with a sliding groove and a fishhook hole, the fishhook hole is in clearance fit with the radial profile of a fishhook, the sliding groove extends to the fishhook hole from the flanging to one side of the fishhook driving cylinder, and the width of the sliding groove is smaller than the diameter of the fish;

the fishhook is designed into a J shape, the fishhook can be pushed into the fishhook driving cylinder after being twisted to keep the bending part of the fishhook parallel to the expansion rod, the straight section of the fishhook in the fishhook driving cylinder is provided with an annular notch, the diameter of the annular notch is not more than the width of the sliding groove, the tail part of the straight section is sleeved with a sliding support, the sliding support is fixedly connected with the straight section and is in sliding connection with the inner wall of the fishhook driving cylinder, the head part of the straight section is sleeved with a spring base, the spring base is in sliding connection with the straight section and is detachably fixed at the head end of the fishhook driving cylinder, the spring base and the sliding support are respectively connected and fixed with two ends of a tension spring, and the tension spring is twisted in the fishhook driving cylinder along with the rotation of the sliding support;

the fishhook driving cylinder is provided with a fishhook channel penetrating through the upper end surface and the lower end surface, the fishhook driving cylinder and the sliding support are provided with mutually matched clamping holes, the tail end of the plectrum can be inserted into the clamping holes to enable the sliding support to be locked at the position close to the tail end of the fishhook driving cylinder and enable the tension spring to be stretched, the fishhook driving cylinder is provided with a straight sliding chute which is arranged along the axial direction, one side of the straight sliding chute, close to the head end of the fishhook driving cylinder, is radially bent and extended along the fishhook driving cylinder, an arc-shaped slideway is formed on the surface of the fishhook driving cylinder, the sliding support is provided with a sliding needle extending into the straight sliding chute, after the tail end of the plectrum leaves the sliding support, the stretched and twisted tension spring pulls the sliding support to linearly move along the straight sliding chute to the arc-shaped slideway and then twists the sliding support along the arc-shaped slideway, the annular notch on the straight;

the plectrum has the tail end of L type, and the plectrum is installed in the one side of expansion rod dorsad fishhook actuating cylinder, and when the reed was compressed to the expansion rod and is drawn close the fishhook actuating cylinder, the tail end of plectrum inserted the card hole towards the fishhook actuating cylinder to make the plectrum other end draw close to the fishhook around the fulcrum E that is close to the expansion rod, hold-down mechanism is installed to the plectrum one side of fulcrum E dorsad, and the expansion rod is connected to hold-down mechanism's one end, and the pressure towards card hole is applyed to the tail end of plectrum to the other end, and the plectrum other end is connected with the tail thorn, and the tail thorn extends to and exposes the fishhook parallel and.

Preferably, the extension spring is a coil spring or a rubber band.

Preferably, the tail end of the fishhook passes through the fishhook driving cylinder and then is connected with the handle.

Preferably, the number of the tail spines is two, and the tail spines are symmetrically arranged on two sides relative to a middle line of the expansion rod in the longitudinal direction.

Furthermore, the annular notch is replaced by a cutting groove parallel to the bending part of the fishhook, the diameter of a straight section at the cutting groove is not larger than the width of the sliding groove, the cutting groove rotates along with the fishhook until the cutting groove is parallel to the sliding groove, and the turning plate slides along the cutting groove in the direction far away from the fishhook.

Further, the plectrum is equipped with the breach that is close to the head end, the spacer is connected to the one side of expansion lever orientation breach, the spacer is L shape, one end is connected with the expansion lever, the other end wedges in the breach of the plectrum that is in locking sliding support state, still install slidable slider on the plectrum, the length sum of slider and spacer along plectrum lengthwise direction is not more than the length of breach along plectrum lengthwise direction, the slider can slide to the position that makes spacer and plectrum wedge simultaneously, the slider that makes the plectrum be connected with the spacer prevents to rotate around fulcrum E, the slider can slide to the position staggered with the spacer in breach department, the spacer can pass the relative plectrum vertical motion of breach when making the plectrum stirred.

Preferably, the poking sheet is an elastic plate bent to form an obtuse angle, and the intersection point of the obtuse angles is a fulcrum E.

Preferably, the fulcrum E is a hinge shaft hinged to the side of the expansion rod facing the shifting block, and the hinge shaft is spaced from the surface of the expansion rod.

Furthermore, one side of the shifting piece, which is back to the fulcrum E, is provided with an ear plate parallel to the longitudinal direction of the shifting piece, the pin shaft is fixed on the ear plate, the pressing mechanism is a torsion spring, and the torsion spring is provided with a spiral coil wound around the pin shaft, one end embedded into the expansion rod and one end abutting against the shifting piece.

The invention has the following characteristics and effects:

the invention skillfully utilizes the original four-step copying and extending method of hooking, ejecting, cutting and picking, when biting the tail-biting, the fishhook with larger triggering size is ejected along the width direction parallel to the fish mouth, thus being beneficial to preventing the fishhook from spitting, the fishhook rotates to be vertical to the width direction of the fish mouth after extending into the fish mouth, simultaneously the tail-biting is triggered to expand and eject relative to the fishhook, effectively preventing unhooking, the structure of the two-side tail-biting is beneficial to hanging, being capable of preventing the fishhook from sliding and hanging empty, a frame is sleeved with a slidable safety latch in a gap of a shifting piece connected with the tail-biting, and a positioning piece connected with an expansion rod is arranged in the gap, so that the safety latch can be shifted when hanging bait, the safety latch is enabled to connect the shifting piece with the positioning piece, the shifting piece is prevented from rotating around a fulcrum E, and the phenomenon that the tail-biting is prevented from rebounding due to false triggering is avoided. The original design of the invention ensures that the fishing efficiency of fishing by utilizing the fishhook is 100 percent, when the fishhook is used for fishing, the fishhook does not need to look after the float specially, does not need to adjust the number of the floats accurately, does not need to lift a rod, shake lines and hang mouths, does not need to carry out complicated calculation of float lead eating, and a fisherman can be out of the scene after throwing the fishhook, even leave a fishing ground and wait for fish.

Drawings

FIG. 1 is a schematic view of the present invention after the torsion catapulting type expanding fishhook is compressed and twisted;

fig. 2 is a view in the direction D of the bottom of the expansion rod of fig. 1;

FIG. 3 is an enlarged schematic view of section I of FIG. 1;

FIG. 4 is an enlarged schematic view of section II of FIG. 1;

FIG. 5 is a schematic view of the orientation F of the hold-down mechanism of FIG. 1;

FIG. 6 is a schematic view showing the state of the torsion ejection type expanding fishhook of the present invention after being ejected and twisted;

FIG. 7 is a schematic view of the front of the pick and the tail of FIG. 1;

FIG. 8 is a front and side view of the slider of FIG. 1;

fig. 9 is a schematic view showing the state that the torsion ejection type expanding fishhook of the invention is lying in water;

FIG. 10 is a partial enlarged view of the right half of FIG. 6;

1-handle, 10-spring base, 11-extension spring, 12-sliding needle, 13-sliding support, 14-upper bolt, 15-sleeve top cover, 16-fishhook driving cylinder, 17-fishhook channel, 18-clamping hole, 19-straight chute, 20-arc chute, 21-plectrum, 22-notch, 2-reed, 3-hold-down mechanism, 4-pin shaft, 41-ear plate, 42-spiral coil, 5-expansion rod, 51-flanging, 52-chute, 53-fishhook hole, 6-safety latch, 61-positioning piece, 62-saddle-shaped component, 63-slide block, 64-handle, 7-hook, 71-bending part, 72-straight section, 73-annular notch, 8-tail thorn, 9-lower bolt.

Detailed Description

The technical solution of the present invention is further explained with reference to the accompanying drawings.

The torsion ejection type expansion fishhook of the invention as shown in fig. 1 and 6 comprises: the fishing hook 7, the fishing hook driving cylinder 16, the expansion rod 5, the reed 2 and the plectrum 21 are composed of 16 parts.

The reed 2 is U-shaped, one end of the reed 2 is fixed with the tail end (the upper end in fig. 1 and 3) of the fishhook driving cylinder 16 through the upper plug 14, the other end of the reed 2 is connected with the tail end (the upper end in fig. 1 and 3) of the expansion rod 5, the head end of the expansion rod 5 is provided with a flanging 51 which is bent 90 degrees towards the fishhook driving cylinder 1, when the expansion rod 5 is pressed close to the fishhook driving cylinder 16, the flanging 51 covers the head end (the lower end in fig. 1 and 4) of the fishhook driving cylinder 16, referring to the direction D in fig. 1, 2 and 4, the flanging 51 is provided with a sliding groove 52 and a fishhook hole 53, the fishhook hole 53 is in clearance fit with the radial profile of the straight section 72 of the fishhook 7, the sliding groove 52 extends to the fishhook hole 53 from the flanging 51 to one side of the fishhook driving cylinder 16, and the width of the sliding groove 52 is smaller than the diameter.

The fishhook 7 is designed and constructed in a J shape, the fishhook 7 is twisted to keep the bending part 71 of the fishhook parallel to the expansion rod 5 and then pushed into the fishhook driving cylinder 16, the straight section 72 of the fishhook 7 in the fishhook driving cylinder 16 is provided with an annular notch 73, the diameter of the annular notch 73 is not more than the width of the sliding groove 52, the tail part (namely the upper part) of the straight section 72 is sleeved with a sliding support 13, the sliding support 13 is fixedly connected with the straight section 72 and is in sliding connection with the fishhook driving cylinder 16, the head part (namely the lower part) of the straight section 72 is sleeved with a spring base 10, the spring base 10 is in sliding connection with the straight section 72, the spring base 10 is detachably fixed at the head end of the fishhook driving cylinder 16, the spring base 10 and the sliding support 13 are respectively connected and fixed at the two ends of the extension spring 11, and the extension spring 11 is twisted in the fishhook driving cylinder 16 along with the rotation of. Alternatively, the extension spring 11 may be a coil spring or a rubber band. As shown in fig. 6, the annular groove 73 can be replaced by a groove parallel to the two sides of the curved portion 71 of the hook 7, so that the rod 5 can be expanded after the hook 7 is rotated by 90 degrees, and the two grooves are axially symmetrically arranged along the straight section 72, and the distance between the two grooves is not more than the width of the sliding groove 52.

The fishing hook driving cylinder 16 is provided with a fishing hook channel 17 penetrating through the upper end surface and the lower end surface, the fishing hook driving cylinder 16 and the sliding support 13 are provided with mutually matched clamping holes 18, the tail end of the plectrum 21 can be inserted into the clamping holes 18 to enable the sliding support 13 to be locked at the position close to the tail end of the fishing hook driving cylinder 16 and enable the extension spring 11 to be extended, the fishing hook driving cylinder 16 is provided with a straight sliding groove 19 arranged along the axial direction, one side of the straight sliding groove 19 close to the head end of the fishing hook driving cylinder 16 is radially bent and extended along the fishing hook driving cylinder 16, an arc-shaped slideway 20 is formed on the surface of the fishing hook driving cylinder 16, the sliding support 13 is provided with a sliding needle 12 extending into the straight sliding groove 19, after the tail end of the plectrum 21 leaves the sliding support 13, when the sliding support 13 is pulled by the extended and twisted extension spring 11 to linearly move along the arc-shaped slideway 20, the sliding support 13 is twisted along the arc-shaped slideway 20, the annular notch 73 on, the expansion rod 5 is sprung open by the reed 2 relative to the hook 7 as shown in fig. 6.

The plectrum 21 has the tail end of L type (being the upper end of fig. 3), and the plectrum 21 is installed in the one side that expansion rod 5 dorsad the fishhook actuating cylinder 16, and when reed 2 was compressed to expansion rod 5 and is drawn close to fishhook actuating cylinder 16, make the tail end of plectrum 21 insert in calorie hole 18 towards fishhook actuating cylinder 16 to make the plectrum 21 other end can be drawn close to fishhook 7 around the fulcrum E that is close to expansion rod 5, the one side that plectrum 21 dorsad fulcrum E installs hold-down mechanism 3, and hold-down mechanism 3's one end is connected with expansion rod 5, and the other end exerts the pressure towards calorie hole 18 to the tail end of plectrum 21, and the plectrum 21 other end is connected with tail thorn 8, and tail thorn 8 extends to and is close to fishhook 7 that exposes fishhook actuating cylinder 16.

Preferably, the two tail spines 8 are symmetrically arranged on both sides of the longitudinal midline of the expanding rod 5 as shown in fig. 7, according to the design as shown in fig. 1 and 3, the tail spines 8 are bitten by fish after being hung on the bait, so that the tail spines 8 approach to the fishhook 7, the tail spines 8 and the shifting sheet 21 rotate around the fulcrum E to form a lever, the tail end of the levering shifting sheet 21 overcomes the pressure of the pressing mechanism 3, the tail end of the shifting sheet 21 is opened relative to the fishhook driving cylinder 16, the tail end of the shifting sheet 21 leaves the clamping hole 18, the fishhook 7 is pulled to the spring base 10 by the tension spring 11 along the sliding support 13 (transversely and parallelly ejected relative to the fishmouth, the hooking action is generated, the fishhook is prevented from being spit), the sliding needle 12 on the sliding support 13 slides to the arc-shaped slide way 20 along the straight slide way 19 and rotates along the arc-shaped slide way 20 to cut the fishmouth, the turned-over edge 51 of the head end of the expanding rod 5 is aligned with the annular slot 73 of the expanding rod, and the tail thorns 8 are driven to spring together, so that the fishhook 7 and the tail thorns 8 are synchronously opened in the fishmouth, the tail thorns 8 are J-shaped and are arranged at two sides of the fishhook 7, the fishhook 7 and the tail thorns 8 are in a tetrahedral shape after being opened, the fishmouth is hung in an all-around manner, and sliding can be prevented no matter whether the fishmouth is transversely vertical to the bending part of the fishhook 7 or not.

Alternatively, as shown in fig. 1, the pick 21 may be an elastic plate bent at an obtuse angle, the intersection point of the obtuse angles being a fulcrum E, or a hinge shaft hinged to the pick 21 may be installed on the side of the expansion lever 5 facing the pick 21, such that the hinge shaft is spaced from the surface of the expansion lever 5 as the fulcrum E.

Preferably, fig. 5 is a view of the pressing mechanism 3 shown in fig. 1 from direction F, the pressing mechanism 3 is a torsion spring, a lug plate 41 parallel to the longitudinal direction of the pulling plate 21 is disposed on a side of the pulling plate 21 away from the pivot E, the pin 4 is fixed on the lug plate 41, the lug plate 41 is connected to the pulling plate 21, one end of the torsion spring is embedded in the expansion rod 5, the other end of the torsion spring is pressed against the back of the tail end of the pulling plate 21, and the pin 4 passes through a spiral coil 42 of the torsion spring, so that the torsion spring can rotate around the pin 4.

A further improvement, in order to prevent the tail stab 8 from being triggered by mistake when the bait is hung on the tail stab 8 and the fishhook 7, as shown in fig. 1, 6, 7 and 8, the plectrum 21 is provided with a notch 22 close to the head end (i.e. the lower end), one side of the expansion rod 5 facing the notch 22 is connected with a positioning plate 61, the positioning plate 61 is in an L shape, one end of the positioning plate 61 is connected with the expansion rod 5, the other end of the positioning plate is wedged into the notch 22 of the plectrum 21 in a state of locking the sliding support 13, the plectrum 21 is also provided with a sliding block 63 wrapping two sides of the plectrum 21, as shown in fig. 8a and 8b, the sliding block 63 is provided with a channel wrapping the plectrum 21, the sum of the length of the sliding block 63 and the length of the positioning plate 61 in the notch 22 is not more than the length of the notch 22, after the sliding block 63 is staggered with the positioning plate 61 at the notch 22, the positioning plate 61 can pass through the notch 22 to move vertically relative, when the shifting piece 21 is shifted, the positioning piece 61 blocks the shifting piece 21 from rotating around the fulcrum E through the sliding block 63. The slider 63 can also be designed in the shape of fig. 8c and 8d, fig. 8b being a side view of fig. 8a and fig. 8d being a side view of fig. 8 c.

The surface of the sliding block 63, which faces away from the expansion rod 5, is connected with a saddle-shaped member 62, which together form a safety catch 6.

As shown in figure 1, the tail end of a fishhook 7 passes through a fishhook driving cylinder 16 and then is connected with a handle 1, so that when the fishhook 7 is reset after a fish is fished, the thumb of the right hand is buckled in a saddle-shaped concave arc at the outer side of a shifting sheet 21 in the fishhook driving cylinder 16, an expansion rod 5 is pressed towards the fishhook driving cylinder 16 to be folded, the handle 1 is pinched by the left hand, the fishhook 7 is rotated 90 degrees anticlockwise to be parallel to the expansion rod 5, then the fishhook 7 is pulled upwards to the tail end of the fishhook driving cylinder 16, the tail end of the shifting sheet 21 is automatically wedged into a clamping hole 18 under the action of a torsion spring 3 after the hook is in place, the fishhook 7 can be automatically fixed, then the notch 22 of the shifting sheet 21 is aligned with a positioning sheet 61, and a slide block 63 is slid to clamp the shifting sheet 21 and the positioning sheet 61, and finally bait can be hung on the tail spine 8 and the fishhook 7.

As shown in figure 9, the fishhook can be pulled by a miniature pulling float and a small pull wire, so that the fishhook 7 is kept horizontal in water and is parallel to the swimming direction of fishes, and the baiting of the fishes is facilitated.

Claims

1. A torsion ejection type expansion fishhook is characterized by comprising a fishhook (7), a fishhook driving cylinder (16), an expansion rod (5), a reed (2) and a shifting piece (21),

the reed (2) is U-shaped, one end of the reed (2) is fixed with the tail end of the fishhook driving cylinder (16), the other end of the reed (2) is connected with the tail end of the expansion rod (5), the head end of the expansion rod (5) is provided with a flanging (51) bent towards the fishhook driving cylinder (1), when the expansion rod (5) is pressed to be close to the fishhook driving cylinder (16), the flanging (51) covers the head end of the fishhook driving cylinder (16), the flanging (51) is provided with a fishhook hole (53) and a sliding chute (52), the fishhook hole (53) is in clearance fit with the radial profile of the fishhook (7), the sliding chute (52) extends to the fishhook hole (53) from one side of the flanging (51) facing the fishhook driving cylinder (16), and the width of the sliding chute (52) is smaller than the diameter of the fishhook (7);

the fishhook (7) is designed into a J shape, the fishhook (7) can be pushed into a fishhook driving cylinder (16) after being twisted to keep the bending part (71) of the fishhook (7) parallel to an expansion rod (5), a straight section (72) of the fishhook (7) in the fishhook driving cylinder (16) is provided with an annular notch (73), the diameter of the annular notch (73) is not more than the width of the sliding groove (52), the tail part of the straight section (72) is sleeved with a sliding support (13), the sliding support (13) is fixedly connected with the straight section (72) and is slidably connected with the inner wall of the fishhook driving cylinder (16), the head part of the straight section (72) is sleeved with a spring base (10), the spring base (10) is slidably connected with the straight section (72), the spring base (10) is detachably fixed at the head end of the fishhook driving cylinder (16), the spring base (10) and the sliding support (13) are respectively connected with two ends of a fixed extension spring (11), the extension spring (11) is twisted in the fishhook driving cylinder (16) along with the rotation of the fishhook (7) by the sliding support (13);

a fishhook driving cylinder (16) provided with a fishhook channel (17) penetrating through the upper end surface and the lower end surface, the fishhook driving cylinder (16) and the sliding support (13) are provided with mutually matched clamping holes (18), the tail end of a plectrum (21) can be inserted into the clamping holes (18) to ensure that the sliding support (13) is locked at the tail end close to the fishhook driving cylinder (16) and the extension spring (11) is extended, the fishhook driving cylinder (16) is provided with a straight sliding chute (19) arranged along the axial direction, one side of the straight sliding chute (19) close to the head end of the fishhook driving cylinder (16) is radially bent and extended along the fishhook driving cylinder (16), an arc-shaped slideway (20) is formed on the surface of the fishhook driving cylinder (16), the sliding support (13) is provided with a sliding needle (12) extending into the straight sliding chute (19), after the tail end of the plectrum (21) leaves the sliding support (13), the extended and twisted extension spring (11) pulls the sliding support (13) to linearly move along the straight sliding chute (19), then the sliding support (13) is twisted along the arc-shaped slide way (20), the annular notch (73) on the straight section (72) moves to be aligned with the fishing hook hole (53) at the same time, and the expansion rod (5) is bounced off by the reed (2) relative to the fishing hook (7);

the fishhook pressing mechanism comprises a shifting piece (21) with an L-shaped tail end, wherein the shifting piece (21) is installed on one side, back to a fishhook driving cylinder (16), of an expansion rod (5), when a reed (2) is compressed to the expansion rod (5) to be close to the fishhook driving cylinder (16), the tail end of the shifting piece (21) is inserted into a clamping hole (18) towards the fishhook driving cylinder (16), the other end of the shifting piece (21) can be close to a fishhook (7) around a fulcrum E close to the expansion rod (5), a pressing mechanism (3) is installed on one side, back to the fulcrum E, of the shifting piece (21), one end of the pressing mechanism (3) is connected with the expansion rod (5), the other end of the shifting piece (21) applies pressure towards the clamping hole (18) to the tail end of the shifting piece (21), the other end of the shifting piece (21) is connected with a tail spike (8), and the tail spike (8) extends to be flush with the fishhook (7) exposed out.

2. The torsionally ejecting expandable fishhook according to claim 1, characterised in that the tension spring (11) is a helical spring or a rubber band.

3. The torque ejection type expandable fish hook according to claim 1, wherein the tail end of the hook (7) is connected to the handle (1) after passing through the hook driving cylinder (16).

4. The torsionally ejecting expandable fishhook according to claim 1, characterised in that the number of the tail barbs (8) is two, arranged bilaterally symmetrically with respect to the median line of the expansion rod (5) in the longitudinal direction.

5. A torsion ejection type expansion fishhook according to any one of claims 1 to 4, characterized in that the annular groove (73) is replaced by a groove parallel to the curved part (71) of the fishhook (7), the diameter of the straight section (72) at the groove is not larger than the width of the runner (52), the groove rotates with the fishhook (7) until the groove is parallel to the runner (52), and the flap (51) slides along the groove in the direction away from the fishhook (7).

6. The torsion ejection type expansion fishhook according to any one of claims 1 to 4, characterized in that the pick (21) is provided with a notch (22) near the head end, one side of the expansion rod (5) facing the notch (22) is connected with a positioning plate (61), the positioning plate (61) is L-shaped, one end of the positioning plate is connected with the expansion rod (5), the other end of the positioning plate is wedged into the notch (22) of the pick (21) in a state of locking the sliding support (13), the pick (21) is further provided with a slidable sliding block (63), the sum of the lengths of the sliding block (63) and the positioning plate (61) along the longitudinal direction of the pick (21) is not more than the length of the notch (22) along the longitudinal direction of the pick (21), the sliding block (63) can slide to a position where the positioning plate (61) and the pick (21) are wedged at the same time, so that the pick (21) is prevented from rotating around the fulcrum E by the sliding block (63) connected with the positioning plate (, the sliding block (63) can slide to a position staggered with the positioning sheet (61) at the notch (22), so that the positioning sheet (61) can pass through the notch (22) to vertically move relative to the shifting sheet (21) when the shifting sheet (21) is shifted.

7. The torsionally ejecting expandable fishhook according to claim 6, characterised in that the pick (21) is an elastic plate bent at an obtuse angle, the intersection of which is the fulcrum E.

8. A torsionally ejecting expandable fishing hook according to claim 6, wherein the fulcrum E is a hinge axis of the expansion lever (5) hinged to the pick (21) on the side facing the pick (21), the hinge axis being spaced apart from the surface of the expansion lever (5).

9. A torsion ejection type expansion fishhook according to any one of claims 7 to 8, characterized in that one side of the plectrum (21) facing away from the pivot E is provided with an ear plate (41) parallel to the longitudinal direction of the plectrum (21), the pin (4) is fixed on the ear plate (41), the hold-down mechanism (3) is a torsion spring, the torsion spring is provided with a spiral coil (42) wound around the pin (4), and one end of the embedded expansion rod (5) and one end of the pressing plectrum (21).