Quick exchange device having detachable rear guard

Abstract

Disclosed in the present invention is a quick exchange device having a detachable rear guard. The quick exchange device comprises a rear guard, wherein a front clamping sheet and a rear clamping sheet extend downward from the bottom end of the rear guard, the front clamping sheet and the rear clamping sheet can retract and cooperate with each other to clamp a heel of a skate body, through holes respectively penetrate the front clamping sheet and the rear clamping sheet, a connecting bolt passes through the through holes, a connecting member is provided on the front clamping sheet, a retracting structure which enables the connecting member to move along the connecting bolt is provided on the connecting bolt, a folding handle is provided at one end of the connecting bolt, and a locking member capable of locking the rotation of the connecting bolt is provided on the rear clamping sheet. The present invention aims to provide a quick exchange device having a detachable rear guard, by means of which, when a skater and a goalkeeper need to rotate positions, a rear guard can be detachably mounted on a heel of a skate body in a rapid manner, without needing to change into different ice skates, thereby effectively saving on the cost of investing in a pair of ice skates.

Description

Removable rear guard quick-change device Technical Field

[0001] The invention relates to the field of sliding shoes, in particular to a detachable rear guard quick-exchange device. Background Art

[0002] Ice hockey is an intense, fast-paced, and highly technical sport characterized by intense competition and teamwork. It not only tests individual players' skill and physical fitness, but also requires inter-player coordination and cooperation. Ice hockey, with its fast-paced and exciting gameplay, has attracted the attention and love of numerous fans and sports enthusiasts. The fundamental techniques of ice hockey include skating and offensive and defensive techniques similar to those in soccer. Skating is the most fundamental skill that ice hockey players must master, encompassing starting, forward skating, backward skating, freewheeling turns, pressure turns, and sudden stops, as well as specialized skating techniques for goalkeepers. Ice hockey players' equipment includes ice hockey skates, ice hockey blades, protective gear, and ice hockey sticks. Among these, ice hockey skates play a crucial role in protecting the player. Ice hockey requires frequent rapid turns, acceleration, and stopping, placing high demands on ankle stability and support. Ice hockey skates are designed with specialized ankle support structures, such as back guards and ankle pads, to provide additional support and reduce the risk of ankle injuries. Therefore, properly fitted ice hockey skates are crucial for ice hockey players. In this situation, a properly fitted pair of ice hockey skates is incredibly important. Whether the shoes fit properly and whether the traction is comfortable or not directly impacts a player's performance. For top players, their feet are just as sensitive as their hands, and they can sense when someone else has worn their shoes.

[0003] During team training, players rotate according to different training activities and objectives. For example, during technical training, players may take turns practicing passing, shooting, dribbling, and other techniques to improve their skills. During tactical training, players may rotate according to position and tactical requirements to familiarize themselves with different positions and tactical systems. Goalkeepers are also rotated during training. The purpose of goalkeeper rotation is to ensure that every goalkeeper has the opportunity to receive specialized goalkeeping training, ensuring that all team members receive equal opportunities and sufficient training, thereby improving the strength and competitiveness of the entire team. However, goalkeepers and players use different ice hockey skates. Goalkeeper blades have short, flat blades with multiple connections between the blade and the blade holder to prevent ball leakage. Many existing ice hockey skates have a structure that allows for quick blade replacement, so that goalkeepers can rotate blades with players. However, because players often perform maneuvers like backsliding, their ice hockey skates are equipped with a back plate at the top of the upper at the heel. This plate provides better protection for the player's ankles, tendons, and other parts of the body. Furthermore, the plate provides support for the player's foot when they pull their legs back while backsliding. Goalkeepers, on the other hand, need to move quickly and agilely to react and prevent shots from being scored. Therefore, goalkeepers' skates are typically more flexible and agile than players' skates. Goalkeepers' skates are designed to provide better ankle flexibility and be lighter, making it easier for them to move quickly around the goal and make saves. Therefore, goalkeepers' skates do not have back plates. Since the back plates on existing ice hockey skates are sewn onto the upper, when a player switches to the goalie position, or when the goalkeeper switches players, the rotating player needs to change to a different skate, which is very time-consuming and increases equipment costs.

[0004] Therefore, the connection of the rear guard plate of the existing ice hockey skates needs to be further optimized and improved. Summary of the Invention

[0005] The purpose of the present invention is to provide a detachable rear guard plate quick interchange device for players and goalkeepers when they rotate.

[0006] To achieve the above objectives, the present invention adopts the following solution: a detachable rear guard quick-interchange device, comprising a rear guard, wherein a front clip and a rear clip extend downwardly from the bottom end of the rear guard, the front clip and the rear clip being capable of contracting and engaging with each other to clamp the rear guard to the heel of a shoe at the top of the upper, the front clip and the rear clip each having a through hole extending therethrough, a rotatable connecting bolt passing through each through hole, the front clip being provided with a connecting buckle that movably fits over the connecting bolt, the connecting bolt being provided with a contraction structure that allows the connecting buckle to move along the connecting bolt when the connecting bolt is rotated, a folding handle being provided at one end of the connecting bolt located outside the rear clip for driving the connecting bolt to rotate, and a locking member being provided on the rear clip for locking the connecting bolt to prevent rotation of the connecting bolt. The locking member can cooperate with the connecting bolt to firmly clamp the front and rear clips to the heel of the shoe, thereby enhancing safety for athletes during the intense and fast-paced game of ice hockey and allowing players and goalkeepers to rotate without having to change ice hockey boots.

[0007] As a preferred embodiment of the present invention, a mounting groove is provided through the heel of the shoe body at the top of the upper, the two through holes respectively correspond to the mounting grooves and are connected to each other, and the inner side walls of the front clip and the rear clip facing each other are provided with friction patterns that can respectively contact the front and rear sides of the heel of the shoe body.

[0008] As a further solution of the present invention, an annular groove is provided on the circumferential outer wall surrounding the connecting bolt, and the locking part includes a locking plate that can move up and down and is arranged on the inner wall of the rear clip, and the bottom of the locking plate is provided with a locking tooth that can be inserted into the annular groove, and the locking part is provided with a lock buckle that can lock the locking plate on the inner wall of the rear clip and prevent it from moving up and down when the locking tooth is inserted into the annular groove.

[0009] As a preferred embodiment of the present invention, the retracting structure includes at least one oblique spiral groove disposed on the outer circumferential wall of the connecting bolt at the front end of the annular tooth groove. The oblique spiral groove starts at the end of the connecting bolt away from the folding handle and ends at the end of the connecting bolt closer to the annular tooth groove. The oblique spiral groove rotates less than one revolution along the outer circumferential wall of the connecting bolt. The inner wall of the connecting buckle is provided with a protrusion that can be embedded in and moved along the corresponding oblique spiral groove. The large pitch oblique spiral groove allows the connecting buckle to move quickly along the axial direction of the connecting bolt without rotating the connecting bolt multiple times, making it faster to remove and install the protective plate.

[0010] As a preferred solution of the present invention, a hexagonal countersunk hole coaxial with the through hole is provided on the front side wall of the front clip, and the connecting buckle includes a hexagonal piece embedded in the hexagonal countersunk hole, a connecting column extends from the center of one side of the hexagonal piece, and a connecting hole is provided at the axis of the hexagonal piece and the connecting column. The connecting bolt is inserted into the hole at one end away from the folding handle, and the protrusion is formed on the inner wall of the hole.

[0011] As a preferred solution of the present invention, the folding handle includes a connecting head fixedly arranged on the end of the connecting bolt located outside the rear clip, the diameter of the connecting head is larger than the diameter of the through hole, and a flippable torsion ring is hinged on the connecting head.

[0012] As a preferred solution of the present invention, the torsion ring is hinged on the circumferential outer wall of the connecting head in a semicircular arc shape, an inner groove is provided along the circumferential outer wall of the connecting head, and a protrusion that can be embedded in the inner groove is provided on the inner wall of the torsion ring, and the cross-sections of the inner groove and the protrusion are both semicircular.

[0013] As a preferred solution of the present invention, a accommodating groove is provided on the inner wall of the rear clip, and an outer wall of the rear clip is provided with an opening connected to the top of the accommodating groove. The locking plate is movably accommodated in the accommodating groove, and a trapezoidal guide groove is provided in the accommodating groove. A trapezoidal guide block that can be embedded in the guide groove and slide up and down along the guide groove is fixed on the locking plate.

[0014] As a preferred solution of the present invention, the lock includes a positioning hole arranged on the outer side wall of the rear clip, and the top of the locking plate is provided with a spring piece that can extend from the opening and extend downward along the outer side wall of the rear clip, and the spring piece is provided with a buckle that can be snapped into the positioning hole.

[0015] As a preferred solution of the present invention, elastic arms capable of pressing against the top inner wall of the accommodating groove are symmetrically provided on the shoulder of the locking plate.

[0016] In summary, the present invention has the following beneficial effects compared to the prior art: the present invention clamps the rear guard plate at the heel of the shoe body at the top of the upper by contracting the front and rear clips together, and by twisting the connecting bolt inserted into the through hole, the connecting buckle provided on the front clip moves quickly along the oblique spiral groove. A locking plate that can move up and down is then used, and a locking plate that can be inserted into the annular tooth groove provided on the connecting bolt is provided at the bottom end of the locking plate to lock the connecting bolt so that it cannot rotate. This can achieve the effect of quickly and detachably installing the rear guard plate on the heel of the shoe body. When ice hockey players and goalkeepers rotate, they only need to use a pair of commonly used ice hockey skates. In addition to the conventional function of replacing ice skates, the ice hockey skates worn by players and goalkeepers can also quickly disassemble and assemble the rear guard plate, without the need to change to different ice hockey skates. This effectively saves the cost of ice hockey skates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a three-dimensional view of the back of the present invention when it is installed on an ice hockey skate.

[0018] FIG2 is a front perspective view of the present invention when it is installed on an ice hockey skate.

[0019] FIG. 3 is one of the cross-sectional views of the present invention, and an enlarged view of a local area in the view.

[0020] FIG4 is a second cross-sectional view of the present invention, and an enlarged view of a local area in the view.

[0021] FIG5 is a third cross-sectional view of the present invention, and an enlarged view of a local area in the view.

[0022] FIG6 is a fourth cross-sectional view of the present invention, and an enlarged view of a local area in the view.

[0023] FIG. 7 is a fifth cross-sectional view of the present invention, and an enlarged view of a local area in the view.

[0024] FIG. 8 is one of the exploded views of the present invention.

[0025] FIG. 9 is a second exploded view of the present invention, and an enlarged view of a local area in the view.

[0026] FIG10 is a three-dimensional view of the connecting buckle sleeve on the connecting bolt and the locking plate in the present invention.

[0027] FIG11 is a three-dimensional view of the connecting buckle of the present invention.

[0028] FIG. 12 is a three-dimensional view of the connecting bolt of the present invention.

[0029] FIG13 is an enlarged view of point A in FIG8 .

[0030] FIG14 is a schematic diagram of the angle between the oblique spiral groove and the axis of the connecting bolt in the present invention.

[0031] Explanation of reference numerals: 1, rear guard plate; 2, front clip; 3, rear clip; 4, connecting bolt; 5, connecting buckle; 6, retracting structure; 7, folding handle; 8, locking member; 9, locking buckle; 10, shoe body; 11, mounting groove; 12, friction pattern; 13, clamp; 14, clamping groove; 21, hexagonal countersunk hole; 22, hexagonal plate; 23, connecting column; 24, sleeve hole; 30, through hole; 31, receiving groove; 32, opening; 33, guide groove; 41, annular tooth groove; 60, driving section; 61, oblique spiral groove; 62, protrusion; 71, connector; 72, torsion ring; 73, inner groove; 74, protrusion; 80, locking section; 81, locking plate; 82, locking tooth; 83, trapezoidal guide block; 84, elastic arm; 85, semicircular groove; 91, positioning hole; 92. Shrapnel; 93. Buckle. Implementation Method

[0032] The following detailed description provides various embodiments or examples for implementing the present invention. Of course, these are merely examples or embodiments and are not intended to be limiting. Furthermore, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. Such repetition is for simplicity and clarity in describing the present invention and does not imply a specific relationship between the different embodiments and / or configurations discussed.

[0033] In addition, spatially related terms may be used, such as "below," "lower side," "from the inside out," "above," "upper side," and similar terms. These terms are used to facilitate the description of the relationship between one element or feature and another element or feature in the drawings. These spatially related terms include different orientations of the device in use or operation, as well as the orientations described in the drawings. The device may be turned to different orientations, rotated 90 degrees or other orientations, and the spatially related adjectives used therein may also be interpreted in the same way. Therefore, they cannot be understood as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments: a detachable rear guard quick-interchange device as shown in Figures 1 to 14, includes a shoe body 10 and a rear guard 1, and a front clip 2 and a rear clip 3 extend downward from the bottom end of the rear guard 1, and the top of the heel of the shoe body 10 is inserted between the front clip 2 and the rear clip 3. The front clip 2 and the rear clip 3 can shrink and fit with each other to clamp the rear guard 1 at the position where the heel of the shoe body 10 is located at the top of the shoe upper, and the front clip 2 and the rear clip 3 are respectively penetrated by through holes 30 that are interconnected, and a mounting groove 11 is penetrated at the position where the heel of the shoe body 10 is located at the top of the shoe upper, and the two through holes 30 respectively correspond to the mounting grooves 11 and are connected to each other, and the inner side walls of the front clip 2 and the rear clip 3 facing each other are provided with friction patterns 12 that can contact the front and rear sides of the heel of the shoe body 10 respectively. A rotatable connecting bolt 4 is passed through the two through holes 30. The connecting bolt 4 passes through the through hole 30 of the rear clip 3, passes through the mounting groove 11, and extends into the through hole 30 of the front clip 2. A connecting buckle 5 that can be movably mounted on the connecting bolt 4 is provided on the front clip 2. A contraction structure 6 is provided on the connecting bolt 4, which allows the connecting buckle 5 to move along the connecting bolt 4 when the connecting bolt 4 rotates. A folding handle 7 that can drive the connecting bolt 4 to rotate is provided at one end of the connecting bolt 4 located outside the rear clip 3, and a locking member 8 that can lock the connecting bolt 4 from rotating is provided on the rear clip 3. When the shoe is in the state of being stepped on, the front and rear members 2 and 3 are moved in opposite directions, and the front and rear members 2 and 3 are released from the state of being stepped on, so that the shoe is in the state of being stepped on.

[0035] As shown in Figures 3 to 14, a groove 14 is provided around the outer wall of the circumference of the connecting bolt 4, and a clamp 13 is provided in the groove 14 to prevent the connecting bolt 4 from escaping from the through hole 3. In this embodiment, the groove 14 divides the connecting bolt 4 into two sections, front and back. An annular tooth groove 41 is provided on the outer wall of the circumference of the connecting bolt 4 around the section close to the folding handle 7, and an accommodating groove 31 is provided on the inner side wall of the rear clip 3. The locking member 8 includes a locking plate 81 that can move up and down and is accommodated in the accommodating groove 31. A trapezoidal guide groove 33 is provided in the accommodating groove 31, and a trapezoidal guide block 83 that can be embedded in the guide groove 33 and slide up and down along the guide groove 33 is fixed on the locking plate 81. The bottom of the locking plate 81 is provided with a locking tooth 82 that can be inserted into the annular groove 41. In this embodiment, a semicircular groove 85 is provided at the bottom of the locking plate 81. The semicircular groove 85 can be clamped on the outer circumferential wall of the connecting bolt 4, and the locking tooth 82 is protruding from the top of the semicircular groove 85. It should also be noted that the width of the annular groove 41 is greater than the width of the locking tooth 82, so that the locking tooth 82 can be better inserted into the annular groove 41. The locking member 8 is provided with a lock 9 that can lock the locking plate 81 to the inner wall of the rear clip 3 when the locking tooth 82 is inserted into the annular groove 41, preventing it from moving up and down. Specifically: the outer wall of the rear clip 3 is provided with an opening 32 connected to the top of the accommodating groove 31, the lock buckle 9 includes a positioning hole 91 arranged on the outer wall of the rear clip 3, and the top of the locking plate 81 is provided with a spring piece 92 that can extend from the opening 32 and then bend downward and extend downward along the outer wall of the rear clip 3. The spring piece 92 is provided with a buckle 93 that can be snapped into the positioning hole 91, and the buckle 93 is a right-angled triangle with the top horizontal. The shoulder of the locking plate 81 is symmetrically provided with elastic arms 84 that can press against the top inner wall of the receiving groove 31. In this embodiment, the locking member 8 is made of plastic or carbon fiber. The locking plate 81, the spring piece 92 and the elastic arm 84 are integrally formed. The elastic arm 84 is made of two arc-shaped parts. When a force is applied, it will deform. By utilizing the elasticity of the material itself, when no pressure is applied, the elastic arm 84 will press the locking plate 81 downward. The buckle 93 on the spring piece 92 will be inserted into the positioning hole 91 when the locking tooth 82 is inserted into the annular tooth groove 41. Since the locking plate 81 is restricted by the receiving groove 31 and cannot move left and right, the connecting bolt 4 cannot rotate. When unlocking is required, the spring piece 92 is bent upward to allow the buckle 93 to withdraw from the positioning hole 91, and then the spring piece 92 is lifted upward to allow the locking plate 81 to move upward. The locking tooth 82 is disengaged from the annular tooth groove 41, and the connecting bolt 4 can rotate again.

[0036] It should be emphasized that, as shown in Figures 3 to 14, the contraction structure 6 includes at least one oblique spiral groove 61 provided on the circumferential outer wall of the connecting bolt 4 at the front end of the annular tooth groove 41, the starting point of the oblique spiral groove 61 is located at the end of the connecting bolt 4 away from the folding handle 7, and the end point of the oblique spiral groove 61 is located at the end of the connecting bolt 4 close to the annular tooth groove 41, and the oblique spiral groove 61 rotates less than one circle along the circumferential outer wall of the connecting bolt 4. Specifically, please refer to Figure 14. The slot 14 divides the connecting bolt 4 into two sections, one section close to the folding handle 7 is where the annular tooth groove 41 is located. In this embodiment, The first segment is referred to as the locking segment 80, while the other segment is the driving segment 60. The driving segment 60 includes an oblique spiral groove 61, with its starting and ending points at the left and right ends. In this embodiment, there are two symmetrical oblique spiral grooves 61, each of which rotates only half a circle along the outer circumference of the driving segment 60. As shown in FIG14 , the angle θ between the helical line of each oblique spiral groove 61 and the axis B of the connecting bolt 4 is 50 degrees. This means that the helical lines of the oblique spiral grooves 61 have a large pitch. This allows the connecting buckle 5 to move quickly on the connecting bolt 4, enabling quick assembly and disassembly of the rear guard plate 1, which is convenient and time-saving. The inner wall of the connecting buckle 5 is provided with a protrusion 62 that fits within and moves along the corresponding oblique spiral groove 61. It should be noted that the oblique spiral groove 61 may be one, two, three, or more, or may be a U-shaped spiral groove. If it is a U-shaped spiral groove, it means that after the connecting bolt 4 rotates a certain angle, the connecting buckle 5 will move to one side along the connecting bolt 4. If the connecting bolt 4 continues to rotate, the connecting buckle 5 will move along the connecting bolt 4 to the side from which it came.

[0037] In addition, as shown in Figures 2 to 13, a hexagonal countersunk hole 21 coaxial with the through hole 30 is provided on the front side wall of the front clip 2. The connecting buckle 5 includes a hexagonal piece 22 embedded in the hexagonal countersunk hole 21. A connecting post 23 extends from the center of one side of the hexagonal piece 22. A connecting hole 24 is formed at the axis of the hexagonal piece 22 and the connecting post 23. The end of the connecting bolt 4 away from the folding handle 7 is inserted into the hole 24, and the protrusion 62 is formed on the inner wall of the hole 24. The hexagonal piece 22 is embedded in the hexagonal countersunk hole 21, so that the connecting buckle 5 cannot rotate but moves along the connecting bolt 4, thereby synchronously moving the front clip 2.

[0038] In addition, in order to facilitate the rotation of the connecting bolt 4, the folding handle 7 includes a connecting head 71 fixedly arranged at one end of the connecting bolt 4 located on the outside of the rear clip 3. The diameter of the connecting head 71 is larger than the diameter of the through hole 30. A torsion ring 72 that can be flipped into a horizontal shape is hinged on the connecting head 71. The torsion ring 72 is hinged on the circumferential outer wall of the connecting head 71 in a semicircular arc shape. An inner groove 73 is provided along the circumferential outer wall of the connecting head 71, and a protrusion 74 that can be embedded in the inner groove 73 is provided on the inner wall of the torsion ring 72. The cross-sections of the inner groove 73 and the protrusion 74 are both semicircular. When not in use, the torsion ring 72 is embedded in the inner groove 73 by the protrusion 74 and fixed. In this way, when the ice hockey player slides, collision will not cause the connecting bolt 4 to rotate, which is safer.

[0039] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable rear guard plate quick exchange device, comprising a rear guard plate (1), characterized in that: A front clip (2) and a rear clip (3) extend downwardly from the bottom end of the rear guard plate (1); the front clip (2) and the rear clip (3) can be contracted and matched with each other to clamp the rear guard plate (1) at the position of the heel of the shoe body (10) located at the top of the upper; through holes (30) that are connected to each other are respectively penetrated on the front clip (2) and the rear clip (3); a rotatable connecting bolt (4) is penetrated in the two through holes (30); a connecting buckle (5) that can be movably mounted on the connecting bolt (4) is provided on the front clip (2); a contraction structure (6) that allows the connecting buckle (5) to move along the connecting bolt (4) when the connecting bolt (4) rotates is provided on the connecting bolt (4); a folding handle (7) that can drive the connecting bolt (4) to rotate is provided at one end of the connecting bolt (4) located outside the rear clip (3); and a locking member (8) that can lock the connecting bolt (4) from rotating is provided on the rear clip (3).

2. The detachable rear guard quick-interchange device according to claim 1, characterized in that: A mounting groove (11) is formed through the heel of the shoe body (10) at the top of the upper, the two through holes (30) respectively correspond to the mounting grooves (11) and are connected to each other, and friction patterns (12) are provided on the inner side walls of the front clip (2) and the rear clip (3) facing each other and capable of contacting the front and rear sides of the heel of the shoe body (10).

3. The detachable rear guard quick-interchange device according to claim 1, characterized in that: An annular tooth groove (41) is provided on the circumferential outer wall of the connecting bolt (4) near one end of the folding handle (7) and around the circumferential outer wall of the connecting bolt (4); the locking member (8) comprises a locking plate (81) which is arranged on the inner wall of the rear clamp (3) and can move up and down; a locking tooth (82) which can be inserted into the annular tooth groove (41) is provided at the bottom of the locking plate (81); and a lock buckle (9) is provided on the locking member (8) which can lock the locking plate (81) on the inner wall of the rear clamp (3) so that it cannot move up and down when the locking tooth (82) is inserted into the annular tooth groove (41).

4. The detachable rear guard quick-interchange device according to claim 3, characterized in that: The contraction structure (6) comprises at least one oblique spiral groove (61) arranged on the circumferential outer wall of the connecting bolt (4) at the front end of the annular tooth groove (41); the starting point of the oblique spiral groove (61) is located at the end of the connecting bolt (4) away from the folding handle (7); the end point of the oblique spiral groove (61) is located at the end of the connecting bolt (4) close to the annular tooth groove (41); the oblique spiral groove (61) rotates less than one circle along the circumferential outer wall of the connecting bolt (4); and a protrusion (62) capable of being embedded in the corresponding oblique spiral groove (61) and moving along the corresponding oblique spiral groove (61) is provided on the inner wall of the connecting buckle (5).

5. The detachable rear guard quick-interchange device according to claim 4, characterized in that: A hexagonal countersunk hole (21) coaxial with the through hole (30) is provided on the front side wall of the front clip (2); the connecting buckle (5) comprises a hexagonal plate (22) embedded in the hexagonal countersunk hole (21); a connecting column (23) extends from the center of one side of the hexagonal plate (22); a connecting hole (24) is connected through the axis of the hexagonal plate (22) and the connecting column (23); the end of the connecting bolt (4) away from the folding handle (7) is inserted into the hole (24); and the protrusion (62) is formed on the inner wall of the hole (24).

6. The detachable rear guard quick-interchange device according to claim 1, characterized in that: The folding handle (7) comprises a connecting head (71) fixedly arranged on an end of the connecting bolt (4) located outside the rear clamping piece (3); the diameter of the connecting head (71) is larger than the diameter of the through hole (30); and a flippable twist ring (72) is hingedly connected to the connecting head (71).

7. The detachable rear guard quick-interchange device according to claim 6, characterized in that: The twist ring (72) is hinged on the circumferential outer wall of the connecting head (71) in a semicircular arc shape, an inner groove (73) is provided along the circumferential outer wall of the connecting head (71), and a protrusion (74) capable of being embedded in the inner groove (73) is provided on the inner wall of the twist ring (72), and the cross-sections of the inner groove (73) and the protrusion (74) are both semicircular.

8. The detachable rear guard quick-interchange device according to claim 3, characterized in that: An accommodating groove (31) is provided on the inner side wall of the rear clamping piece (3), an opening (32) communicating with the top of the accommodating groove (31) is provided on the outer side wall of the rear clamping piece (3), the locking plate (81) is movably accommodated in the accommodating groove (31), a trapezoidal guide groove (33) is provided in the accommodating groove (31), and a trapezoidal guide block (83) capable of being embedded in the guide groove (33) and sliding up and down along the guide groove (33) is fixedly provided on the locking plate (81).

9. The detachable rear guard quick-exchange device according to claim 8, characterized in that: The lock buckle (9) comprises a positioning hole (91) arranged on the outer side wall of the rear clip (3); a spring sheet (92) is arranged on the top of the locking plate (81) and can extend from the opening (32) and then extend downward along the outer side wall of the rear clip (3); and a buckle (93) is arranged on the spring sheet (92) and can be snapped into the positioning hole (91).

10. The detachable rear guard quick-exchange device according to claim 3, characterized in that: Elastic arms (84) capable of pressing against the top inner wall of the accommodating groove (31) are symmetrically arranged on the shoulder of the locking plate (81).

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