TWM661080U - Crossbow empty string unloading mechanism - Google Patents

Abstract

This invention discloses a crossbow empty string unloading mechanism, which includes a crossbow case, a trigger group and a string release mechanism. The crossbow case is connected to a crossbow body to provide a storage space. The trigger group is contained in the crossbow case to constrain the bowstring to move. The string release mechanism is contained in the crossbow case and interacts with the trigger group to selectively trigger the trigger group to release the bowstring. Through the composition of the above components, after the crossbow is tightened, when the bowstring tension is to be released, the string release mechanism is used in conjunction with the string puller to pull the bowstring, so that the bowstring slowly leaves the crossbow case and releases its kinetic energy, achieving a damage-free crossbow structure and safe bowstring release.

Description

Crossbow empty string unloading mechanism

This creation is related to the technical field of crossbows, especially a crossbow empty string unloading mechanism.

According to the structure of the crossbow in the market, as can be seen from the previous case of Taiwan's Patent No. 207344, it includes a crossbow body, a crossbow wing horizontally arranged at the front end of the crossbow body, a bowstring connecting the two ends of the crossbow wing, and a crossbow box mounted on the crossbow body and interacting with the bowstring.

The bowstring is pulled tight by the string puller, and interacts with the crossbow body to form the action of stringing and releasing the bowstring. For the structure of the crossbow box, please refer to Taiwan's patent No. I662245.

Although the above structure can achieve the action of controlling the bowstring to be wound and released, not all bowstrings can have a target after being wound, or the shooting environment can be safe. As a result, the user must release the bowstring tension.

The common practice is to shoot at soft targets, or to shoot directly without using the bow and arrow (commonly known as releasing the bowstring). The former will cause a certain degree of wear and tear on the bow and arrow, while the latter will cause damage to the crossbow. To avoid this defect, industry leaders have proposed solutions, such as US patents US11002505 or US9360268, but their structures are too complicated and inconvenient to operate, and there is a need for improvement.

In view of the above problems and deficiencies of the previous technologies, one of the purposes of this invention is to provide a crossbow string unloading mechanism through structural innovation to overcome the deficiencies of the previous technologies.

To achieve the above purpose, this invention proposes a crossbow empty string unloading mechanism, which includes a crossbow case, a trigger group and a string release mechanism. The crossbow case is connected to a crossbow body to provide a storage space. The trigger group is contained in the crossbow case to constrain the bowstring to move. The string release mechanism is contained in the crossbow case and interacts with the trigger group to selectively trigger the trigger group to release the bowstring. Through the composition of the above components, after the crossbow is tightened, when the bowstring tension is to be released, the string release mechanism is used in conjunction with the string puller to pull the bowstring, so that the bowstring slowly leaves the crossbow case and releases its kinetic energy, achieving a damage-free crossbow structure and safe bowstring release.

10: Crossbow box

12: Half shell

121: Shell chamber

1221: First articulation column

1222: Second hinge pillar

1223: The third hinge pillar

14: Shell cover

141: Cover the chamber

142: string release slot

143: Release String Slide

144:Activity slot

16: Cover plate

182: Arrow tail groove

184: Arrow tail groove

221: First reset part

222: Second reset piece

223: Third reset piece

24: Actuator

242: T-type body

244: First barrier

246: Second barrier

25: latch

251: First arm

252: Second arm

253: The third arm

26: String hook claw

261: Claw Arm

262: Claw hook

263: Stopper

321, 322: Limiting slots

331, 332: Block slide

34: Elastic limiter

35: Insurance transfer

351: Locking plate

352, 353: Slide section

354, 355: Stroke section

3522: First positioning groove

3524: Second positioning slot

41: Release the string and pick the block

411: Pillar Department

412: First block

4121: First slope

413: Second block

4131: Concave

4132: Second slope

4133: Joint slot

4134: abutment section

42: Lever

431: Long slot hole

432: vertical arm section

44: Carriage

441: Clubhead

442:Shaft

443: Hook

4421: Push Department

4422: Retreat Department

45: Torsion spring

46: blocking parts

461:Packing section

462: Deduction Department

463: Pillar

47: Elastic pressing parts

92: Bowstring

[Figure 1] A three-dimensional schematic diagram of an embodiment of the present invention.

[Figure 2] is a schematic diagram of the decomposition of the embodiment shown in Figure 1.

[Figure 3] is a schematic diagram of the partial component decomposition of the embodiment shown in Figure 2 (I).

[Figure 4] is a schematic diagram of the partial component decomposition of the embodiment shown in Figure 3.

[Figure 5] is a schematic diagram of partial component decomposition of the embodiment shown in Figure 2 (Part 2).

[Figure 6] is a schematic diagram of the partial components of the embodiment shown in Figure 5 from another perspective.

[Figure 7] is a schematic diagram of the partial components of the embodiment shown in Figure 6.

[Figure 8] Schematic diagram of the operation of the present invention under normal conditions.

[Figure 9] is a partial schematic diagram of the embodiment shown in Figure 8.

[Figure 10] Schematic diagram of the operation of this creative embodiment in the winding state.

[Figure 11] is a partial schematic diagram of the embodiment shown in Figure 10.

[Figure 12] Schematic diagram of the plectrum release block moving to the prepared position in the present invention.

[Figure 13] Schematic diagram of the secondary string pulling action of the embodiment of the present invention.

[Figure 14] is a partial schematic diagram of the embodiment shown in Figure 13.

[Figure 15] Schematic diagram of the action of the string release plectrum moving to the string release position according to the embodiment of the present invention (I).

[Figure 16] Schematic diagram of the action of the string release plectrum moving to the string release position according to the embodiment of the present invention (II).

[Figure 17] is a partial schematic diagram of the embodiment shown in Figure 15.

Please refer to the relevant drawings below to further explain the embodiment of the crossbow empty string unloading mechanism of the present invention. The various objects in the embodiment are depicted according to the proportions, sizes, deformations or displacements suitable for the description, rather than the proportions of the actual components, which should be explained first. And the same and symmetrically arranged components in the remaining embodiments are all represented by the same numbers. In addition, the directional terms such as "front, back, left, right, up, down, inside, outside" in the description of each embodiment listed below are expressed according to the specified viewing direction and cannot be used as an interpretation of the limitation of the present invention.

Please refer to Figures 1 to 7, the crossbow empty string unloading mechanism of the present invention includes a crossbow box 10, a trigger group (not marked with a figure number), a trigger safety group (not marked with a figure number) and a string release mechanism (not marked with a figure number).

The crossbow mechanism box 10 is assembled in a crossbow (not shown in the figure), including a half shell 12, a shell cover 14, and a cover plate 16 assembled on the top of the half shell 12, and together define a tail slot 182 and a tail slot 184; the half shell 12 (previous technology) has a shell chamber 121, and first, second, and third hinge posts 1221, 1222, 1223.

The aforementioned shell chamber 121, as shown in FIG. 4 , is recessed in the end surface of the half shell 12 facing the shell cover 14.

The first, second and third hinge posts 1221, 1222, 1223 are erected at the preset positions of the shell chamber 121, as shown in FIG. 4.

The shell cover 14 has a cover chamber 141, a string release slot 142, a string release slide 143, and a movable slot 144.

The aforementioned cover chamber 141 is recessed in the end surface where the shell cover 14 and the half shell 12 abut.

The aforementioned string release slot 142 is formed through the preset position of the shell cover 14, connecting the cover chamber 141 and the outside.

The aforementioned string release slide 143 is recessed in a preset position of the cover chamber 141.

The aforementioned movable groove 144 is recessed at a preset position of the cover chamber 141 and presents a truncated cone profile that is narrower than the upper width.

The trigger assembly (prior art), as shown in FIGS. 2 to 4 , is assembled in the half shell 12 and accommodated in the shell chamber 121 , and includes a first, second and third reset member 221 , 222 , 223 , a pull member 24 , a latch member 25 , and a string-pulling claw 26 .

The pull member 24, as shown in FIGS. 2 to 4 , has a T-shaped body 242 and a first and a second stop 244 and 246 .

The front end of the horizontal section of the aforementioned T-shaped body 242 is pivoted with the first pivot column 1221, and the end of the vertical section extends to the outside of the crossbow case 10 and is pushed by the first reset member 221, so that the horizontal section of the T-shaped body 242 is far away from the other end of the first pivot column 1221 and is normally pressed against the first limit end surface 1261 of the shell chamber 121.

The first and second stops 244 and 246 are erected at the front and rear ends of the top surface of a T-shaped body 242.

The latching member 25, as shown in Figures 2 to 4, is pivoted with the second pivoting column 1222, and has a first arm 251 extending upward, a second arm 252 extending downward, and a third arm 253 extending forward; wherein the second arm 252 is pushed up by the second reset member 222, so that the third arm 253 is selectively pressed against the second limit end surface 1262 and the pull member 24 (one end of the horizontal section of the T-shaped body 242).

The string hook claw 26, as shown in Figures 2 to 4, is pivoted with the third pivot post 1223 and has an integrally formed claw arm 261, a claw hook 262, and a stopper 263.

The aforementioned claw hook 262 is formed by extending downward from one end of the claw arm 261 in the extension direction.

The aforementioned stopper 263 is formed by extending downward from the claw arm 261 toward the lower end surface. The string hook claw 26 is pushed up by the third reset member 223, so that one end of the string hook claw 26 near the claw hook 262 is normally in contact with the wall of the shell chamber 121; the other end of the claw arm 261 is in contact and interacts with the first arm 251 of the latch 25.

The trigger safety assembly (previous technology) mentioned above, as shown in Figures 1 to 4, is separately arranged in the shell chamber 121 and the cover chamber 141, including two limiting slots 321, 322, two pull block slideways 331, 332, an elastic limiter 34, and a safety pull block 35.

The limiting slots 321, 322, as shown in Figures 4 to 6, are pierced through the crossbow case 10 (half shell 12 and shell cover 14).

The said block slides 331, 332, as shown in Figures 4 to 6, are symmetrically recessed in the shell chamber 121 and the cover chamber 141, respectively, and are connected to the limiting slots 321, 322.

The elastic stopper 34, as shown in FIG4 , is pivotally mounted on the outer peripheral side of the second pivot column 1222 , and one end protrudes into the block slide 331 of the half shell 12 .

The safety lever 35, as shown in Figures 1 to 4, is accommodated and extended in correspondence with each lever slideway 331, 332 and each limit slot 321, 322, and is moved between an "upper lock position" or an "unlocked position" by external force or the string hook claw 26. The safety lever 35 has an integrally formed lock plate portion 351, two slide plate portions 352, 353, and two lever portions 354, 355.

The aforementioned slide portions 352, 353 are respectively arranged at the two end sides of the lock portion 351 orthogonally, and between the end surfaces of the two slide portions 352, 353 facing each other, a hollow area is defined for the partial movement of the claw arm 261 and the stop portion 263 of the string hooking claw 26. Each slide plate portion 352, 353 is slidably arranged corresponding to the slide rails 331, 332, wherein at least one slide plate portion 352 (353) has a first and a second positioning groove 3522, 3524 on the lower end surface. When the safety lock block 35 is displaced to the "locking position", the first positioning groove 3522 and one end of the limit member 34 are mutually engaged, and when the safety lock block 35 is displaced to the "unlocking position", the second positioning groove 3524 and one end of the limit member 34 are mutually engaged.

The two levers 354 and 355 are respectively arranged perpendicular to the slides 352 and 353 and are arranged on the outer side of the slides 352 and 353, and extend through the limit slots 321 and 322 to protrude from the outer side of the crossbow case 10 (half shell 12 and shell cover 14). In practice, when the safety lever 35 is displaced to the "locked position", the lock piece 351 is just above the second stopper 246 of the trigger 24, thereby blocking the trigger 24 from being pulled; and when the safety lever 35 is displaced to the "unlocked position", it is just between the first and second stops 244 and 246 of the trigger 24, and will not interfere with the movement of the trigger 24.

The above-mentioned string release mechanism, as shown in Figures 1, 5 to 7, includes a string release plucking block 41, a plucking rod 42, a pull rod 43, a rocker 44, a torsion spring 45, a blocking member 46, and an elastic pressure member 47.

The string release poke block 41 is accommodated in the cover chamber 141 corresponding to the position of the string release slot 142, and selectively moves between a "safe position", a "preparation position", and a "string release position", and has a poke column portion 411, a first poke block portion 412, and a second poke block portion 413 connected in series in sequence.

One end of the aforementioned plucking column 411 extends through the string release slot 142 to the outside of the shell cover 14, allowing the user to plucking and displacing the string release plucking block 41 to a preset position, such as moving from the "safe position" to the "prepared position".

The aforementioned first block portion 412 has a first slope 4121 at the front end. During implementation, the first slope 4121 is further provided with a first and a second stage segment.

The second repelling block 413 is assembled on the side of the first repelling block 412, and has a recess 4131, a second slope 4132, a hinge groove 4133, and a contact section 4134.

The recess 4131 is formed at the top of the second block portion 413.

The second slope 4132 is formed adjacent to the recess 4131 at the rear end of the second block portion 413.

The hinge groove 4133 is formed on the downward end surface of the second retracting block portion 413.

The abutment section 4134 is formed on the front end surface of the second retracting block 413.

The aforementioned lever 42 is pivoted on the shell cover 14 and arranged at a preset position of the cover chamber 141, and one end is pivoted with the pivot groove 4133 of the second lever block 413.

The aforementioned pull rod member 43 is accommodated in the cover chamber 141, one end of which is pivotally connected to one end of the lever member 42 away from the second lever block portion 413, and the other end of which has a long slot hole 431 and a vertical arm section 432.

The long slot hole 431 is formed by passing through the pull rod 43, providing a passage for the first pivot column 1221 to extend through.

The vertical arm section 432 is formed by extending upward from the top of the pull rod 43, and is selectively pushed up by the stopper 263 of the string hook claw 26, thereby moving the pull rod 43.

The aforementioned rocker 44 is accommodated in the movable groove 144 and can move up and down and forward and backward. It has a rod head 441, a rod body 442, and a hook portion 443 in order from top to bottom, wherein the rod body 442 also includes a push portion 4421 and a retreat portion 4422.

The rod head 441 abuts against the first slope 4121 of the string release plectrum 41 (first plectrum portion 412).

The push portion 4421 selectively pushes against the safety lever 35 (lever portion 354) when the rocker 44 moves in the movable groove 144.

The retreat portion 4422 provides retreat space for the safety block 35 (slide portion 352) to move when the rocker 44 moves in the movable groove 144.

When the rocker 44 moves upward in the movable slot 144, the hook portion 443 selectively hooks the latch 25 to rotate, allowing the string hook claw 26 to release the bowstring.

The aforementioned torsion spring 45 is pivoted at a preset position of the cover chamber 141, with one end abutting against the wall of the cover chamber 141 and the other end abutting against the top of the second disengagement block 413, and moves between the recess 4131 and the second slope 4132.

The aforementioned blocking member 46 has one end pivoted on the half shell 12 and abuts against the string hook claw 26, selectively moving with it, and the other end selectively overlaps with the path of the string release paddle 41 moving to the "string release position", and has a abutting portion 461, a buckling portion 462 and a column 463.

One end of the abutting portion 461 is pivotally connected to the third pivot post 1223 of the half shell 12, and abuts against one side of the string hook claw 26.

The buckling portion 462 is formed at one end of the abutting portion 461, away from the third pivot post 1223, and buckles against the top end of the string hook claw 26.

The column 463 is formed on the top end surface of the buckling portion 462.

The elastic pressure piece 47 has one end sleeved on the column 463 and the other end abuts against the wall of the cover chamber 141, and the normal pressure-locking part 462 fits the string hook claw 26.

Therefore, the above is an introduction to the various components and assembly methods of the crossbow string unloading mechanism in a preferred embodiment provided by this invention. The operating features of the embodiment of this invention are introduced as follows.

<Under normal conditions or after shooting, the string release block 41 is synchronously displaced to a safe position>

In normal state, as shown in Figures 8, 9 and 16, the string hook claw 26 is pushed up by the third reset member 223, causing the claw hook 262 of the string hook claw 26 to swing upward.

During the process, the stopper 263 of the string hook claw 26 pushes the vertical arm section 432 of the pull rod 43, pulling the pull rod 43 to move horizontally toward the arrow tail groove 182. The lever 42 connected to the linkage pivot swings, allowing the string release block 41 connected to the lever 42 to move toward the "safe position" direction.

After the string release plectrum 41 reaches the "safe position", one end of the torsion spring 45 is placed in the recess 4131 at the top of the string release plectrum 41 (the second plectrum portion 413) to constrain the string release plectrum 41 to be in the "safe position" normally. At the same time, the blocking member 46 is pressed by the elastic pressure member 47 and is tightly attached to the outer peripheral side of the string hook claw 26, and overlaps with the path of the string release plectrum 41 moving to the "string release position".

<Stretch the bow and lock it simultaneously>

Please refer to Figures 4, 8 to 12. Through the string puller (not shown in the figure, previous technology), the bowstring 92 is pulled into the crossbow case 10 through the arrow tail slot 184, and the stopper 263 of the string hook claw 26 is pushed against, so that the string hook claw 26 is linked to swing around the third pivot column 1223; during the process, the string hook claw 26 is opposite to the other end of the claw hook 262, and moves upward and compresses the third reset member 223, and no longer presses against the first arm 251 of the latch 25, so that the latch 25 is pushed up by the second reset member 222 and pivots and returns around the second pivot column 1222, so that the first arm 251 of the latch 25 presses against the lower end surface of the claw arm 261.

In addition, the end of the hook 26 near the hook 262 swings downward, so that the stopper 263 pushes the lock plate 351 of the safety lever 35, so that the safety lever 35 moves from the "unlocked position" to the "locked position", and the first positioning groove 3522 of the sliding plate 352 on the lower end surface is separated from the limit member 34, and the second positioning groove 3524 is engaged with the limit member 34. At this time, the lock plate 351 of the safety lever 35 is located above the second stopper 246 of the pull member 24.

Remove the string puller and let the bowstring 92 hook on the hook 262 of the string hook claw 26. Since the other end is pressed by the latch 25 (first arm 251), the bowstring 92 cannot be released.

At this point, the winding and automatic locking (safety) actions have been completed. Because the lock plate portion 351 of the safety lever 35 is located above the second stop 246 of the trigger 24, the user cannot trigger the trigger 24 to rotate.

<Switch to the ready position for releasing the bowstring>

Please refer to FIG. 12 . When the user needs to release the tension of the bowstring 92 , he or she uses the lever portion 411 of the string release lever 41 to manually move the string release lever 41 from the “safety position” toward the “preparation position”.

When the string-releasing plectrum 41 is moved to the "prepared position", the abutment section 4134 at the front end of the string-releasing plectrum 41 (second plectrum portion 413) will be blocked by the blocking member 46 on the path and cannot move forward any further. During this process, the torsion spring 45 will be forced to leave the recess 4131 of the string-releasing plectrum 41 (second plectrum portion 413) and be located at the second slope 4132 of the string-releasing plectrum 41 (second plectrum portion 413), and apply a thrust to the string-releasing plectrum 41 (second plectrum portion 413) toward the "string-releasing position".

The first slope 4121 of the string release plectrum 41 (first plectrum portion 412) slightly pushes the rod head 441 of the rocker 44, causing the rocker 44 to move slightly upward (as shown in FIG. 13).

At this time, the safety switch 35 is still in the "locked position", so the trigger 24 cannot function, ensuring that the trigger (not shown in the figure) will not be accidentally triggered to cause the trigger 24 to be actuated, resulting in a misfire.

<Pull the bowstring slightly to allow the string release block 41 to automatically move from the prepared position to the string release position>

Please refer to Figures 8, 13 to 17. The user again slightly pulls the bowstring 92 through the string puller (not shown in the figure, known in the art), pushes against the stopper 263 of the string hook claw 26, and moves the other end of the string hook claw 26 away from the claw hook 262 upward, and simultaneously pushes the buckle 462 of the blocking member 46, and moves the blocking member 46 upward, leaving the path of the string release poke block 41 to move toward the "string release position".

In this way, the torsion spring 45 can smoothly push the string release paddle 41 to move toward the "string release position"; during the process, the first slope 4121 of the string release paddle 41 (first paddle portion 412) pushes the rod head 441 of the rocker 44, causing the rocker 44 to move upward as a whole.

In addition to applying upward displacement force to the broom 44, the first slope 4121 also applies forward thrust to the broom 44, allowing the broom 44 to form upward and forward displacement actions in the movable groove 144.

When the tote 44 moves forward, the pusher 4421 of the shaft 442 pushes the safety lever 35 (lever 354) from the "locked position" to the "unlocked position". When the tote 44 moves upward, its hook 443 pushes the third arm 253 of the latch 25 upward, allowing the latch 25 to swing around the second pivot 1222, so that the second arm 252 no longer presses against the claw arm 261 of the string hook claw 26. The string hook claw 26 is pushed up by the third reset member 223, and the claw hook 262 at one end of the string hook claw 26 swings upward to get rid of the hooking resistance to the bowstring 92 (as shown in Figure 8).

In this way, the user can release the tension of the bowstring 92 with the help of the string puller, so that it slowly leaves the crossbow box 10 and releases its kinetic energy, achieving a damage-free crossbow structure and safely releasing the tension of the bowstring 92.

The above description is only the best implementation method of this creation, which is intended to clarify the characteristics of this creation, and is not used to limit the scope of the implementation of this creation. The equal changes made by ordinary technicians in this technical field based on this creation, as well as the changes familiar to technicians in this field, should still fall within the scope of this creation.

10: Crossbow box

12: Half shell

14: Shell cover

142: Release string slot

16: Cover plate

182: Arrow tail groove

184: Arrow tail groove

322: Limiting slot

35: Insurance block

411: Pillar Department

Claims (8)

A crossbow string unloading mechanism is provided on a crossbow body to release the tension of a bowstring, comprising: a crossbow mechanism box, which is accommodated in a preset position of the crossbow body, and comprises a half shell body and a shell cover body which are matched; the half shell body is recessed with a shell chamber and is equipped with a trigger group for restraining the bowstring; the shell cover body is recessed with a cover chamber, a string release slot hole which actually passes through the shell cover body and is connected to the cover chamber, and a movable slot recessed in a preset position of the cover chamber; The string release poke block is corresponding to the position of the string release slot, is accommodated in the cover chamber, and selectively moves between a safe position, a preparatory position, and a string release position, and one side of the string release poke block has a poke post portion extending through the string release slot, a front end has a first slope and a contact section, a top end has a recess, a bottom end has a pivot groove, and a rear end has a second slope; a poke rod is pivoted on the shell cover, and one end thereof is pivoted with the pivot groove and moves synchronously; a A rod member is accommodated in the cover chamber and can move horizontally. One end of the rod member is pivoted with one end of the release rod member away from the release block and moves together. The other end has a long slot and a vertical arm section. The long slot is pivoted with the half shell body, and the vertical arm section is selectively pushed up by the trigger group to move the rod member. A rocker is accommodated in the movable groove and can move up and down. It has a rod head, a rod body, and a hook from top to bottom, wherein: the rod head abuts against On the first slope; the hook selectively triggers the trigger group to release the bowstring; a torsion spring pivoted on the shell cover, one end of which moves between the recess and the second slope; a blocking member, one end of which pivoted on the half shell and interacted with the trigger group, selectively overlapping with the displacement path of the string release poke block and abutting against the abutment section; and an elastic pressing member, one end of which presses against the blocking member and the other end pushes the half shell, and normally presses against the blocking member to fit the trigger group. As described in claim 1, the crossbow string unloading mechanism has a column formed on the top end surface of the blocking member, providing a sleeve for one end of the elastic pressure member. The crossbow string unloading mechanism as described in claim 1, wherein the string release lever has a lever column portion, a first lever portion, and a second lever portion connected in series in sequence; the first slope is formed at the front end of the first lever portion; the second lever portion is arranged on the side of the first lever portion; the recess is formed at the top end of the second lever portion; the second slope is formed adjacent to the recess at the rear end of the second lever portion; the hinge groove is formed on the downward end surface of the second lever portion; and the abutment section is formed on the front end surface of the second lever portion. As described in claim 1, the crossbow string unloading mechanism, wherein the movable slot is in the shape of a truncated cone with a narrow top and a narrow bottom, providing space for the rocking chair to swing forward and backward. The crossbow string unloading mechanism as described in claim 1, wherein the trigger assembly includes: a first reset member, a second reset member and a third reset member, which are respectively accommodated in the shell chamber, and one end of which is in contact with the wall of the shell chamber; a pull member, which is pivoted on the half shell and in contact with one end of the first reset member; a latch, which is pivoted on the half shell and in contact with one end of the second reset member, and normally in contact with the pull member; a string hook claw, which is pivoted on the half shell and in contact with one end of the third reset member, so that one end of the string hook claw is normally in contact with the latch, and the other end selectively grabs the bowstring. The crossbow string unloading mechanism as described in claim 5, wherein the blocking member has: an abutting portion abutting against one side of the string hook claw and one end pivotally connected to the half shell; a buckling portion formed at one end of the abutting portion and buckling against the top end of the string hook claw. As described in claim 5, the crossbow string unloading mechanism, wherein the half shell is further provided with a trigger safety assembly, including at least a safety block that constrains the action of the trigger assembly; in addition, the rod body has a push portion for pushing the safety block to move, and a retreat portion for partially extending the safety block. The crossbow string unloading mechanism as described in claim 7, wherein the trigger safety assembly comprises: two limit slots formed by penetrating the half shell and the shell cover; two pull block slides symmetrically arranged on the end surfaces of the half shell and the shell cover facing each other, and connected with the matching limit slots; an elastic limiter pivotally arranged on the half shell, one end of which protrudes from one of the matching pull block slides; the safety pull block, It is corresponding to each of the slider slideways and each of the limiting slots for accommodating and extending, and is displaced between an upper locking position or an unlocking position by external force, and has a lock plate part, two slide plates orthogonally connected to the lock plate part and slidably arranged on the slider slideway, and two slider rod parts orthogonally connected to each of the slide plates and extending through each of the limiting slots. In addition, one of each of the slide plates has a first positioning groove and a second positioning groove that match and fit with one end of the elastic limiting member.

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