String removing device for U-shaped string tensioner

Abstract

This utility model discloses a string removal device for a U-shaped bowstring, comprising: a drive plate; two pull arms, each pull arm forming an upper action groove and a lower action groove between itself and the drive plate, and each pull arm including a string section, a limiting section, and a string-catching section, with the string of the bowstring pivotally sleeved on each string section, and each string-catching section on the same side as the lower action groove; a limiting module installed on the limiting section of any pull arm, with its part protruding and not inserted into the upper action groove; during movement, the limiting module can release the restriction by contacting the bowstring of the firing trigger housing, eliminating the need to worry about or guess whether the bowstring has been correctly removed, and avoiding excessive pulling that would affect the subsequent firing stability and elasticity of the bowstring, making the string removal process more precise, faster, and more time-saving and labor-saving, achieving positioning and string removal in one go.

Description

Technical Field

[0001] This utility model relates to a U-shaped bowstring unloading device, specifically applied in the field of archery. It mainly explains that when unloading the bowstring midway through shooting, the positioning component on the unloading device matches the crossbow, thereby allowing the bowstring to be removed quickly and accurately without expending excessive force or time in operating the unloading device. Background Technology

[0002] Crossbows are not only a common and highly lethal weapon in the field of archery, but they are also frequently used in sports competitions today. However, the firing speed and power of crossbows are extremely high, making the process of drawing the bow very laborious and time-consuming for users. Therefore, manufacturers have developed a method to operate the bowstring by using a concept similar to a fishing reel. For example, patent publication number M640300, "Quick-release structure of the winding handle of the bowstring reel," is installed on the crossbow. By rotating the handle, the U-shaped buckle of the bowstring reel can be pulled to move the bowstring and bring it into the ready-to-fire position.

[0003] However, a problem has been found during shooting: when the user has engaged the safety and the bowstring is drawn to the ready-to-fire position, they suddenly find that the arrow is not loaded, or when the user has an emergency, for safety reasons, the user must put the crossbow in the safety position before unloading the bowstring. However, the normal bowstring cannot be pulled manually. It must be pulled into the firing position by using the U-lock on the string puller. After that, the U-lock is removed and hung on the crossbow. The above description is the normal operation of pulling the bowstring. However, if the bowstring is already strung and the user moves the U-lock towards the crossbow and toward the bowstring, a problem arises: the user cannot accurately determine the distance at which the U-lock needs to be moved to remove the bowstring. This leads to two possible scenarios: first, the U-lock is not moved correctly, in which case the bowstring cannot be properly removed; second, it is moved too far, causing the user to spend more time and effort, and in severe cases, it may even cause the bowstring to be pulled too far, affecting the accuracy and stability of subsequent shots. Utility Model Content

[0004] The purpose of this invention is to provide a way for users to accurately and quickly place the U-ring directly into position when the bowstring is already in the strung mode, allowing the bowstring to be smoothly removed. This improves upon the prior art where the U-ring is used to remove the bowstring, making it difficult to accurately determine the position of the U-ring to ensure proper removal. If the movement distance is too short, the bowstring cannot be removed properly, but if the movement is too long, it is time-consuming, labor-intensive, and strenuous for the user, and may even affect the elasticity of the bowstring when it is fired.

[0005] Therefore, in order to achieve the above-mentioned objectives and effects, the present invention provides a U-shaped drawstring unloading device, which is movably mounted on an upper bow section of a gun body. It includes: a drive plate; two draw arms, respectively connected to both sides of the drive plate, with each draw arm forming an upper action groove and a lower action groove between itself and the drive plate; each draw arm further includes a wheel bow section, a limiting part, and a bow-holding part; a draw wire of a drawstring device mounted on the gun body is pivotally connected to the wheel bow section of each draw arm; the limiting parts are positioned opposite to the wheel bow sections, and the bow-holding parts are located between the wheel bow sections and the limiting parts and on the same side as the lower action groove; at least one limiting module is disposed on each draw arm. The limiting part of any of the pull arms in the arm, and the at least one limiting module is partially protruding from the upper action groove or not inserted into the limiting part; the bowstring of the gun body is located on the upper strut and is in the strut mode and the safety is open. The at least one limiting module is pushed so that it partially protrudes from the upper action groove. Then the drive plate and the two pull arms are moved toward the upper strut and interlocked with each other. During the movement, the at least one limiting module abuts against a firing trigger housing of the gun body. The bowstring can then be released from its restriction and spring against each of the string-catching parts of the two pull arms. Finally, the drive plate and the two pull arms are driven to retract from the upper strut, thereby completing the unstringing operation. Attached Figure Description

[0006] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0007] Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective;

[0008] Figure 3 This is an exploded three-dimensional structural diagram of the present invention;

[0009] Figure 4 This utility model Figure 1 A schematic diagram of the cross-sectional structure of line segment IV-IV;

[0010] Figure 5 This utility model Figure 4 Diagram of the structure of the beaded jump card movement;

[0011] Figure 6This is a three-dimensional structural diagram of the present invention applied to the gun body;

[0012] Figure 7 This utility model Figure 6 Schematic diagram of partial planar structure;

[0013] Figure 8 This is a schematic diagram of the action structure for preparing to enter the upper string section of this utility model;

[0014] Figure 9 This utility model is designed for entry into the upper cocking section, and the diagram shows the internal action structure of at least one limiting module abutting the firing trigger housing and the pressing block pushing the safety firing block.

[0015] Figure 10 This utility model Figure 9 A schematic diagram of the action structure in which the bowstring is released from its restraints and springs against the string-catching part after the safety component is disengaged and the string-catching hook is released;

[0016] Figure 11 This is a cross-sectional structural diagram of another embodiment of the present invention in which at least one limiting module and a countersunk screw mutually press against each other;

[0017] Explanation of markings in the diagram:

[0018] Bowstring 10;

[0019] Bowstring 20;

[0020] Wire coil 201;

[0021] Wire 202;

[0022] Gun body 30;

[0023] Winding part 301;

[0024] Shooting trigger housing 302;

[0025] Safety trigger block 303;

[0026] 304 stainless steel for the string hook;

[0027] Insurance component 305;

[0028] Trigger firing assembly 306;

[0029] Driver chip 1;

[0030] Pressing block 11;

[0031] Pull arm 2;

[0032] Wheel and string section 21;

[0033] Limiting part 22;

[0034] Mounting hole 221;

[0035] Adjustment hole 222;

[0036] String section 23;

[0037] Upper working groove 3;

[0038] Lower working groove 4;

[0039] Limit module 5;

[0040] Limit bolt 50;

[0041] Pull handle 51;

[0042] 52;

[0043] Guide groove 521;

[0044] Positioning ball groove 522;

[0045] Countersunk screw 6;

[0046] Elastic component 7;

[0047] Stud 71;

[0048] Spring 72;

[0049] Bead 73. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0051] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0052] The following is a reference to the appendix. Figure 1 To be continued Figure 10This invention describes a U-shaped bowstring unloading device, which mainly provides a bowstring puller 20 for users to pull a bowstring 10. The bowstring puller 20 includes a winding assembly 201, a pull line 202, and this invention. The following mainly defines the structure used to hook the bowstring 10, which is movably mounted on an upper string portion 301 of a gun body 30. It includes: a drive plate 1; and two pull arms 2, respectively connected to both sides of the drive plate 1. Each pull arm 2 and the drive plate 1 form an upper working groove 3 and a lower working groove 4. Each pull arm 2 further includes a wheel string portion 21, a limiting portion 22, and a string-fastening portion 23. The pull wire 202 of the string-fastening device 20 is pivotally sleeved on the wheel string portion 21 of each pull arm 2 to control the movement of this utility model. Each limiting portion 22 is opposite to each wheel string portion 21, and each string-fastening portion 23 is located between each wheel string portion 21 and each limiting portion 22 and is connected to the lower working groove 4. On the same side of the action groove 4, each bowstring portion 23 is recessed to hook and pull the bowstring 10; at least one limiting module 5 is installed in the limiting portion 22 of any one of the pull arms 2, and the at least one limiting module 5 is partially protruding from the upper action groove 3 or not inserted into the limiting portion 22; wherein, when the bowstring 10 of the gun body 30 is located in the upper cocking portion 301 and is in the cocking mode and the safety is off, the at least one limiting module The pusher 5 protrudes from the upper action groove 3, and then the drive plate 1 and the two pull arms 2 move toward the upper string 301 and engage with each other. During the movement, at least one limiting module 5 abuts against a firing trigger housing 302 of the gun body 30, and the bowstring 10 is released from the restriction and springs against each string-catching part 23 of the two pull arms 2. Finally, the drive plate 1 and the two pull arms 2 are driven to move away from the upper string 301, thereby completing the unstringing operation.

[0053] Based on the above description, this utility model is drawn on a gun body 30 with a two-stage safety, but it is not intended to limit the model or function of a specific gun body. In general, the following description is based on the premise that the gun body 30 is in the cocked mode and the safety is in a safe state. As shown in Figures 6 to 10, when the gun body 30 is in the cocked mode, the trigger housing 302 contains the safety firing block 303, a string hook 304, a safety assembly 305, and a trigger firing assembly 306. In the cocked mode, the safety assembly 305 is in a safe state and the trigger cannot be pulled, while the string hook 304 is hooked on the bowstring 10 and is mutually locked and restrained by the trigger firing assembly 306. Therefore, firing cannot be performed at this time.Therefore, if the bowstring 10 needs to be removed in this state, the user needs to move the present invention from its original hanging position to the original arrow placement position, and operate the reel assembly 201 to pull the present invention using the pull line 202. Furthermore, the present invention, in the setting of at least one limiting module 5, can be in the form of a limiting bolt 50 and includes a handle portion 51 and a rod portion 52 (subsequent descriptions and illustrations will all refer to the form of the limiting bolt 50). One end of the rod portion 52 is connected to the handle portion 51, and the other end of the rod portion 52 is movable from the outside of the limiting portion 22. The rod 52 is inserted into the limiting part 22, but the part of the rod 52 that is inserted into the limiting part 22 is movable and protrudes into the upper action groove 3 and does not enter the limiting part 22. Therefore, before pulling, the handle part 51 must be pressed to push the part of the rod 52 out of the limiting part 22 and into the upper action groove 3. As the drive plate 1 and the two pull arms 2 gradually move towards the upper cock 301, at least one limiting bolt 50 will abut against the front end of the firing trigger housing 302. In order to improve the accuracy of placement, this invention provides a long columnar pressing block 11 protruding from the bottom surface of the drive plate 1. Therefore, the movement of the aforementioned invention at the same time position The pressing block 11 in the lower actuating groove 4 pushes against the safety firing block 303, causing it to swing downwards. When the safety firing block 303 swings, the previously restricted safety component 305 can be activated. With the safety component 305 released, the trigger firing assembly 306 can operate and release the restriction on the string hook 304. Once the string hook 304 is released, it can pivot upwards and remove the restriction on the bowstring 10. Since this device is inserted into the upper string section 301, the string hook 304 is released, thus releasing the bowstring. After 10 seconds, the bowstring 10 will spring back and abut against the string-hooking part 23 of each pull arm 2. Finally, the user controls the winding assembly 201 and moves the bowstring 10 in the opposite direction to the upper string part 301, thus returning the bowstring 10 to its initial position. This process is not only safe, but also, due to the setting of at least one limiting bolt 50 and the pressure block 11, allows the user to quickly and accurately reach the upper string part 301 when operating the bowstring 10, ensuring that the bowstring 10 is reliably released from the hook of the string-hooking hook 304. More importantly, there is no need to worry about over-pulling the bowstring 10 and affecting its subsequent firing.

[0054] Based on the above description of this utility model, further details of other features of this utility model will be explained. First, the operation of the at least one limiting bolt 50 will be explained, as shown in Figures 4 and 5. In order to facilitate the assembly of the at least one limiting bolt 50, the limiting part 22 in the two pull arms 2, where the at least one limiting bolt 50 is installed, is further provided with a mounting hole 221. The mounting hole 221 extends from the outside to the inside of the limiting part 22 and connects to the upper action groove 3. The rod part 52 of the at least one limiting bolt 50 is threaded through... A mounting hole 221 is provided, and an adjustment hole 222 is further provided on the end face of the limiting part 22 where the mounting hole 221 is provided. The adjustment hole 222 is connected to the mounting hole 221. A countersunk screw 6 is provided and locked in the adjustment hole 222. The countersunk screw 6 is movably screwed toward the rod part 52 and presses the rod part 52, thereby restricting the positioning of at least one limiting bolt 50 after switching, and preventing the rod part 52 from being suddenly pushed away when it is about to hit the firing trigger housing 302 when the upper cocking part 301 is inserted. Please see Figure 11.

[0055] In addition to the above description, to ensure the stable positioning of at least one limiting bolt 50 after adjustment, based on the above structure, as shown in Figures 4 and 5, a guide groove 521 is further recessed on the outer surface of the rod portion 52 corresponding to the adjustment hole 222. An elastic component 7 is installed inside the adjustment hole 222. This elastic component 7 differs from the aforementioned countersunk screw 6 in that one end of the elastic component 7 is movably engaged with the wall of the adjustment hole 222, while the other end of the elastic component 7 movably springs against the guide groove 521. The elastic component 7 further includes a stud 71, a spring 72, and a ball 73. The stud 71 is locked... Within the adjustment hole 222, the bead 73 abuts against the guide groove 521. The two ends of the spring 72 abut against the stud 71 and the bead 73 respectively. The guide groove 521 is further recessed to form a plurality of positioning ball grooves 522, which are spaced apart. When the rod 52 moves within the mounting hole 221, the bead 73 jumps into any one of the positioning ball grooves 522. Therefore, the user only needs to pull or press the handle 51 to make the bead 73 jump between the positioning ball grooves 522, thereby providing the user with a more convenient way to identify whether the at least one limit bolt 50 has made a proper switching action.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A string releasing device of a U-shaped string puller, which is movably installed in an upper string part of a body, characterized in that, include: One driver chip; Two pull arms are respectively connected to both sides of the drive plate, and an upper action groove and a lower action groove are formed between each pull arm and the drive plate. Each pull arm further includes a wheel string part, a limiting part, and a string-catching part. A pull wire of a string-catching device installed on the gun body is pivotally sleeved on the wheel string part of each pull arm. The limiting part is positioned opposite to the wheel string part, and the string-catching part is located between the wheel string part and the limiting part and on the same side as the lower action groove. At least one limiting module is disposed in the limiting part of any one of the levers, and the at least one limiting module is partially protruding from the upper action groove or partially not inserted into the limiting part. The bowstring of the gun body is located on the upper straight section and is in the upper straight mode with the safety open. Pushing at least one limiting module causes it to protrude partially from the upper action groove. Then, the drive plate and the two draw arms are moved toward the upper straight section and interlocked with each other. During the movement, the at least one limiting module abuts against a firing trigger housing of the gun body, and the bowstring is released and springs against the drawstring parts of the two draw arms. Finally, the drive plate and the two draw arms are driven to retract from the upper straight section, thereby completing the bowstring release operation.

2. The string unloading device for the U-shaped bowstring according to claim 1, wherein the at least one limiting module may further be a limiting bolt, the at least one limiting bolt comprising a handle portion and a rod portion, one end of the rod portion being connected to the handle portion, the other end of the rod portion being movably inserted from the outside of the limiting portion, and the portion of the rod portion inserted into the limiting portion being movably protruding from the upper working groove or movably not inserted into the limiting portion.

3. The unloading device for the U-shaped bowstring according to claim 2, wherein the limiting part of the two pull arms, which is equipped with at least one limiting bolt, is further provided with a mounting hole, the mounting hole extending from the outside of the limiting part to the inside and communicating with the upper action groove, and the rod part of the at least one limiting bolt is inserted through the mounting hole.

4. The string unloading device for the U-shaped bowstring according to claim 3, wherein an adjustment hole is further provided on the end face of the limiting part having the mounting hole, the adjustment hole is connected to the mounting hole, and a countersunk screw is provided and locked in the adjustment hole, and the countersunk screw is movably screwed toward the rod and presses the rod.

5. The unloading device for the U-shaped bowstring according to claim 3, wherein an adjustment hole is further provided on the end face of the limiting part having the mounting hole, the adjustment hole is connected to the mounting hole, and the outer surface of the rod is further recessed to form a guide groove corresponding to the adjustment hole, and an elastic component is installed in the adjustment hole, one end of the elastic component is movably engaged with the wall of the adjustment hole, and the other end of the elastic component is movably abutted against the guide groove.

6. The string unloading device of the U-shaped bowstring according to claim 5, wherein the elastic component further includes a stud, a spring and a ball, the stud being locked in the adjusting hole, the ball abutting against the guide groove, and the two ends of the spring respectively abutting against the stud and the ball.

7. The unloading device for the U-shaped bowstring according to claim 6, wherein the guide groove is further recessed to form a plurality of positioning ball grooves, each positioning ball groove being spaced apart, and when the rod moves within the mounting hole, the ball system jumps and locks into any one of the positioning ball grooves.

8. The bowstring unloading device of the U-shaped bowstring according to claim 1, wherein a pressing block is further provided at the bottom of the drive plate and in the lower action groove, and when the at least one limiting module abuts against the firing trigger housing of the gun body, the pressing block in the lower action groove will simultaneously push a safety firing block in the firing trigger housing, and the safety firing block can release the restriction on the bowstring after being pushed.

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