Magnetic type quick release buckle with sliding locking function

Abstract

The utility model provides a magnetic type quick release buckle with sliding locking, which comprises a buckle seat, a buckle piece, a locking piece and a locking block, the buckle piece and a hanging rope can be arranged in a V-shaped clamping groove from an opening, in a secondary locking state, the movement of the buckle piece in the vertical direction is limited through a spring bolt part, and the locking block is moved close to the buckle piece by utilizing magnetic connection, so that the buckle piece can be locked quickly. Secondary locking of the spring bolt part is achieved through limiting of the locking block and the bottom wall, when unlocking is needed, the locking block is moved upwards to enter a primary locking state, the pressed part and the spring bolt part can move at the moment, then the spring bolt part is driven to be separated from the fastener to enter an unlocking state, and magnetic connection is utilized to achieve unlocking. The fastener moves towards the wide end of the V-shaped clamping groove under the action of magnetism, the fastener and the hanging rope can be conveniently taken out of the V-shaped clamping groove through separation of the wide end and the matched side wall of the fastener, secondary locking is achieved, and meanwhile convenient and rapid disassembly can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of connecting piece especially relates to a quick-release buckle of magnetic formula with slide locking. BACKGROUND

[0002] The buckle refers to a mechanical structure that one part is embeddedly connected with another part or is integrally closed, which is very common in the life field, is mostly seen on the rope belt connection of the schoolbag, baby sling, camera and the like, plays a fixing role, due to different application scenes and customer demands, many different types of buckles are developed, such as push motion buckle, slide motion buckle, magnetic buckle and the like, to satisfy different use demands.

[0003] Due to the fragility of the camera itself and the use scene of the camera outdoors, to protect the camera and facilitate carrying and use, the camera is mostly carried in the way of sling, to connect the camera and the sling more conveniently by using the buckle connection mode, meanwhile, the camera will constantly shake in the outdoor use process and the camera itself has a certain weight, the buckle needs to have good connection strength to bear greater pulling force, and the buckle also needs to have the ability of convenient and quick disassembly, thereby making the camera and the like more flexible in use operability, and, to improve the connection stability, the buckle also needs to be provided with a corresponding secondary locking structure, to avoid the user's accidental touch unlocking. SUMMARY

[0004] The utility model aims at providing a quick-release buckle of magnetic formula with slide locking.

[0005] In order to realize the utility model purposes, the utility model provides a quick release buckle with magnetic attraction type and sliding locking, including buckle seat, fastener, lock piece and lock block, the buckle seat is provided with V type clamping groove, the narrow end of V type clamping groove is located below, the wide end of V type clamping groove is located above, the V type clamping groove is provided with through hole along vertical below at the narrow end, the inner side of V type clamping groove is provided with bottom wall, the outer side of V type clamping groove is provided with opening, the fastener is provided with cooperation side wall at opposite two sides, two cooperation side walls are arranged in V type, the fastener is provided with hanging rope between two cooperation side walls and at the tip below, the fastener is provided with first magnet above, the fastener is located in V type clamping groove, cooperation side wall is clamped with V type clamping groove, and the hanging rope passes through the through hole, the lock piece includes lock tongue part, pressure receiving part and elastic part, the elastic part is connected with the buckle seat, the pressure receiving part is used to drive the lock tongue part to move towards the inner side, the elastic part is used to drive the lock tongue part to move and elastically reset towards the outer side, the pressure receiving part is provided with magnetically adsorbed part, the lock block is provided with second magnet below, the lock block is connected with the pressure receiving part and can move in vertical direction, in secondary locking state, the lock tongue part is adjacent to the fastener and restricts the movement of the fastener in vertical direction, the lock block is close to the fastener, the first magnet is magnetically connected with the second magnet, the lock block is adjacent to the outer side of bottom wall, and the lock block restricts the movement of the lock tongue part, in primary locking state, the lock block is away from the fastener, the first magnet is separated from the second magnet, the second magnet is magnetically connected with the magnetically adsorbed part, and the lock block is separated from the bottom wall, in unlocking state, the lock tongue part is separated from the fastener, the fastener moves along vertical direction towards the wide end of V type clamping groove under the action of magnetism, the fastener is close to the lock block, and the first magnet is magnetically connected with the second magnet.

[0006] As can be seen from the above scheme, the fastener and the hanging rope can be loaded into the V type clamping groove from the opening, in the secondary locking state, not only the movement of the fastener in the vertical direction is restricted by the lock tongue part, but also the lock block is moved close to the fastener by magnetic connection, the secondary locking of the lock tongue part is realized by the limiting of the lock block and the bottom wall, and the cooperation side wall and the V type clamping groove are clamped, the stable locking force of the fastener is provided by the action of gravity after the hanging rope hangs the object, when unlocking is needed, the lock block is first moved upwards, so as to enter the primary locking state, at this time, the pressure receiving part and the lock tongue part can move, then the lock tongue part is separated from the fastener, and then the unlocking state is entered, and by magnetic connection, the fastener moves towards the wide end of the V type clamping groove under the action of magnetism, and the cooperation side wall of the fastener is separated from the wide end, so that the fastener and the hanging rope can be conveniently taken out of the V type clamping groove, and secondary locking is realized, and the fastener and the hanging rope can be conveniently and quickly disassembled.

[0007] Further scheme is that the elastic part is arranged in the form of elastic arm, the lock tongue part and the pressure receiving part are sequentially arranged from bottom to top and are connected with the elastic arm respectively, the elastic arm is connected with the buckle seat, and the pressure receiving part is located above the fastener.

[0008] From the above, through the arrangement of the elastic arm, the pressure receiving portion can conveniently drive the unlocking of the lock tongue portion, and the lock tongue portion can also be quickly and stably locked and reset.

[0009] Further, a sliding groove extending in the vertical direction is arranged on the pressure receiving portion, and a sliding block extending in the vertical direction is arranged on the lock block, and the sliding block and the sliding groove are in sliding cooperation.

[0010] From the above, through the sliding cooperation of the sliding block and the sliding groove, the lock block can be stably moved on the pressure receiving portion and stably switched between the two locking states.

[0011] Further, the magnetically attracted portion is a third magnet or a ferromagnetic metal piece, the magnetically attracted portion is located in the middle of the pressure receiving portion, and sliding grooves are arranged on the horizontal two sides of the magnetically attracted portion; the lock block is provided with a matching groove above the second magnet, sliding blocks are arranged on the horizontal two sides in the matching groove, and the magnetically attracted portion is located in the matching groove.

[0012] From the above, through the magnetically attracted portion located in the middle, the one-time locking position of the lock block can be stably ensured, and then the pressing unlocking is smooth.

[0013] Further, a lower limit wall is arranged below the matching groove of the lock block; in the secondary locking state, the lower limit wall is adjacent to the outer side of the bottom wall; and in the one-time locking state, the lower limit wall is adjacent to the magnetically attracted portion.

[0014] From the above, through the limiting of the lower limit wall and the bottom wall, the inward limiting of the pressure receiving portion and the lock tongue portion can be stably realized, and the unlocking by mistake is avoided, and through the limiting of the lower limit wall and the magnetically attracted portion, the upward limiting of the lock block is realized, and the disengagement of the lock block is avoided.

[0015] Further, the lock piece includes a back plate, the pressure receiving portion and the lock tongue portion are located on the outer side of the back plate, and the elastic arm is connected between the back plate and the pressure receiving portion; the pressing window is arranged above the V-shaped clamping groove, the pressure receiving portion and the lock block are located in the pressing window, and the back plate covers the inner side of the pressing window and is fixedly connected with the buckle.

[0016] From the above, through the arrangement of the back plate, not only is the stable installation of the elastic arm provided, but also the assembly and positioning of the lock piece are facilitated.

[0017] Further, the matching groove is provided with a back limiting block on the side close to the back plate, and the back limiting block is adjacent to the back side of the elastic arm.

[0018] From the above, through the limiting of the back limiting block and the back side of the elastic arm, not only is the assembly and positioning of the lock block facilitated, but also the outward disengagement of the lock block is avoided.

[0019] Further, the bottom wall is provided with a through hole, and the lock tongue portion extends into the V-shaped clamping groove from the back side through the through hole.

[0020] From the above, the locking tongue part passes through the through hole from the back side, and then the upper edge of the through hole is limited by the connecting part of the locking tongue part and the pressure part.

[0021] Further, the fastener is provided with a clamping groove on the inner side, and the locking tongue part is detachably clamped with the clamping groove.

[0022] From the above, the locking tongue part has multiple limiting modes, and the locking tongue part can not only limit the upper end of the fastener, but also limit the clamping groove of the fastener.

[0023] Further, the V-shaped clamping groove is provided with a locking groove on each of the opposite sides, the locking grooves on the two sides are arranged in a V shape, each side is provided with a locking block matched with the side wall, the locking blocks on the two sides are arranged in a V shape, and the locking blocks are detachably clamped with the locking grooves.

[0024] From the above, through the clamping of the locking blocks and the locking grooves, the locking force of the fastener can be further improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural diagram of an embodiment of the quick-release buckle of the utility model.

[0026] Figure 2 is a structural diagram of an embodiment of the quick-release buckle of the utility model after omitting the hanging belt.

[0027] Figure 3 is a structural diagram of an embodiment of the quick-release buckle of the utility model from the back side.

[0028] Figure 4 is an exploded view of the buckle seat and the fastener in an embodiment of the quick-release buckle of the utility model.

[0029] Figure 5 is an exploded view of the buckle seat in an embodiment of the quick-release buckle of the utility model.

[0030] Figure 6 is an exploded view of the buckle seat in another view in an embodiment of the quick-release buckle of the utility model.

[0031] Figure 7 is a sectional view of an embodiment of the quick-release buckle of the utility model in a secondary locking state.

[0032] Figure 8 is a sectional view of an embodiment of the quick-release buckle of the utility model in a primary locking state.

[0033] Figure 9 is a sectional view of an embodiment of the quick-release buckle of the utility model in an unlocking state.

[0034] Figure 10 is a sectional view of an embodiment of the quick-release buckle of the utility model in a disengagement state.

[0035] The utility model will be further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION

[0036] Referring to Figures 1 to 10 The quick-release buckle comprises a buckle seat 1, a buckle 2, a lock 3, a lock block 36 and a rear sticker 35. The buckle seat 1 is provided with a V-shaped clamping groove 11, the narrow end of the V-shaped clamping groove 11 is located at the lower side, the wide end of the V-shaped clamping groove 11 is located at the upper side, the V-shaped clamping groove 11 is provided with a through hole 113 at the narrow end and penetrates downward vertically, the inner side of the V-shaped clamping groove 11 is provided with a bottom wall 114, the bottom wall 114 is provided with a through hole 115, the outer side of the V-shaped clamping groove 11 is provided with an opening, the V-shaped clamping groove 11 is provided with a lock groove 112 on each of the two opposite side walls 111, the two lock grooves 112 are arranged in a V shape, the buckle seat 1 is provided with a pressing window 117 above the V-shaped clamping groove 11, the pressing window 117 penetrates in the front-rear direction, and the pressing window 117 is located above the V-shaped clamping groove 11 and is connected to the V-shaped clamping groove 11.

[0037] The buckle seat 1 is provided with a connecting part 118 above the pressing window 117, the connecting part 118 is used for connecting a shoulder strap and a strap 101, the buckle seat 1 is provided with a positioning groove 119 above the pressing window 117, the positioning groove 119 is located at the inner side, and the outer side of the positioning groove 119 is provided with a front stop wall 120.

[0038] The buckle 2 is provided with a matching side wall 21 on each of the two opposite sides, the two matching side walls 21 are arranged in a V shape and are arranged in a narrow-down-wide-up manner, each matching side wall 21 is provided with a lock block 22, the two lock blocks 22 are arranged in a V shape, the buckle 2 is provided with a hanging rope 24 between the two matching side walls 21 and at the lower tip, the buckle 2 is provided with a first magnet 23 at the upper end, the first magnet 23 faces the lock block 36, the buckle 2 is located in the V-shaped clamping groove 11, the matching side wall 21 is clamped with the V-shaped clamping groove 11, the lock block 22 is detachably clamped with the lock groove 112, and the hanging rope 24 penetrates through the through hole 113.

[0039] The lock 3 comprises a lock tongue part 31, a pressure receiving part 39, an elastic part and a back plate 34. In this embodiment, the elastic part is arranged in the form of an elastic arm 33, the lock tongue part 31 and the pressure receiving part 39 are sequentially connected to the elastic arm 33 from bottom to top, the pressure receiving part 39, the lock tongue part 31 and the elastic arm 33 are located at the outer side of the back plate 34, the elastic arm 33 is arranged in a U shape, the elastic arm 33 is connected between the back plate 34 and the pressure receiving part 39, the pressure receiving part 39 is arranged in the form of a convex block protruding outward, the pressure receiving part 39 is fixedly connected by a through hole 343 and a screw, and the back plate 34 is fixedly connected to the back of the buckle seat 1 by a through hole 341 and a screw.

[0040] The pressure receiving part 39 is located above the fastener 2 and is connected with the buckle 1 through the elastic part. The pressure receiving part 39 is used to drive the lock tongue part 31 to move inwardly, and the elastic part is used to drive the lock tongue part 31 to move outwardly and elastically reset. The pressure receiving part 39 is provided with a magnetic attraction part 391. The lock block 36 is provided with a second magnet 37 below. The lock block 36 is connected with the pressure receiving part 39 and can move vertically.

[0041] Specifically, the magnetic attraction part 391 adopts a third magnet or a ferromagnetic metal piece. The magnetic attraction part 391 is made of ferromagnetic metal materials such as iron, nickel, and cobalt, or the magnetic attraction part is integrally arranged with the pressure receiving part and is made of ferromagnetic metal materials. Both of them can realize the magnetic connection between the magnetic attraction part and the second magnet.

[0042] The magnetic attraction part 391 is located below the middle part of the pressure receiving part 39. The horizontal two sides of the magnetic attraction part 391 are respectively provided with a sliding groove 392 extending in the vertical direction. The lock block 36 is provided with a matching groove 361 above the second magnet 37. The horizontal two sides of the matching groove 361 are respectively provided with a sliding block 362 extending in the vertical direction. The magnetic attraction part 391 and the pressure receiving part 39 are located in the matching groove 361. The sliding block 362 is in sliding cooperation with the sliding groove 392. The lock block 36 is provided with a lower limit wall 363 below the matching groove 361. The lower limit wall 363 extends horizontally and is connected between the two sliding blocks 362. The lower limit wall 363 is located at the back side of the second magnet 37. The matching groove 361 is provided with a back limit block 364 on one side close to the back plate 34. The two back limit blocks 364 are respectively located on the horizontal two sides of the matching groove 361. The back limit block 364 is adjacent to the back side of the elastic arm 33. The pressure receiving part 39 and the lock block 36 are located in the pressing window 117. The back plate 34 covers the inner side of the pressing window 117 and is fixedly connected with the buckle 1.

[0043] The lock tongue part 31 is inclined outwardly. The lock tongue part 31 extends into the V-shaped clamping groove 11 from the back side through the through hole 115. The fastener 2 is provided with a clamping groove 25 on the inner side and the outer side. Therefore, the fastener 2 can be clamped in place. When the fastener 2 is located in the V-shaped clamping groove 11 and is in the locked state, the lock tongue part 31 is clamped with the clamping groove 25. When the fastener 2 is separated from the V-shaped clamping groove 11, the upper edge of the through hole 115 is adjacent to the connection position of the lock tongue part 31 and the pressure receiving part 39. The pressure receiving part 39 is located in the pressing window 117. The first magnet is opposite to the second magnet. The elastic arm 33 is located in the positioning groove 119. The elastic arm 33 is adjacent to the front stop wall 120. The back plate 34 covers the inner side of the pressing window 117 and is fixedly connected with the buckle 1. The back side of the back plate 34 is also provided with a back sticker 35. By pressing the lock block 36 inwardly, the pressure receiving part 39 and the lock tongue part 31 are driven to move inwardly. Under the elastic recovery of the elastic arm 33, the elastic arm 33 drives the lock tongue part 31 to move outwardly and elastically reset.

[0044] Referring toFigure 7 When the V-shaped slot 11 is empty, after the fastener 2 is hung on the V-shaped slot 11, the matching side wall 21 is clamped with the V-shaped slot 11 based on the downward pulling of the fastener 2, the lock block 22 is clamped with the lock slot 112, the hanging rope 24 passes through the through hole 113, and the first magnet 23 is magnetically connected with the second magnet 37, so that the lock block 36 moves downward and close to the fastener 2, at this time, it is in the secondary locking state, the lock tongue part 31 is clamped with the clamping slot 25 of the fastener 2 and limits the movement of the fastener 2 in the vertical direction, the first magnet 23 is magnetically connected with the second magnet 37, the abutment of the lock block 36 is on the outer side of the bottom wall 114, and the lower limit wall 363 is abutted on the outer side of the bottom wall 114, the movement of the lock tongue part 31 is limited by the lock block 36, so that the lock block 36 cannot be pressed inward, thereby realizing the secondary locking function.

[0045] Referring to Figure 8 When unlocking is needed, first, the lock block 36 is driven to move upward in the vertical direction away from the fastener 2, and then the first magnet 23 is separated from the second magnet 37, the second magnet 37 is magnetically connected with the magnetically adsorbed part 391, and the lower limit wall 363 is abutted with the magnetically adsorbed part 391, at this time, the lock block 36 is separated from the bottom wall 114, and the lock block 36 can be pressed to unlock.

[0046] Referring to Figure 9 In the unlocked state, the lock block 36 is pressed inward, and then the pressed part 39, the elastic arm 33 and the lock tongue part 31 are driven to move inward, the lock tongue part 31 is separated from the fastener 2, at this time, the fastener 2 moves in the vertical direction towards the wide end of the V-shaped slot under the magnetic action, the fastener 2 moves upward in the vertical direction close to the lock block 36, and the first magnet 23 is magnetically connected with the second magnet 37.

[0047] Referring to Figure 10 Then, the external force of the lock block 36 is released, the elastic arm 33 drives the lock tongue part 31 to move outward and elastically reset under the elastic recovery of the elastic arm 33, and then the lock tongue part 31 can drive the fastener 2 to move outward under the magnetic abutment, and then the user can take away the fastener 2.

[0048] Of course, the above embodiment is only a preferred embodiment of the case, and in specific application, more changes can be made, such as that the elastic arm can be directly connected with the buckle, which can also apply elastic recovery force to the pressed part or the lock tongue part, or the elastic part can also be arranged as a spring or a torsional spring, the spring can abut against the pressed part or the lock tongue part, and the torsional spring can also be connected with the pressed part or the lock tongue part, which can also realize that the elastic part is used to drive the lock tongue part to move outward and elastically reset.

[0049] And the lock tongue part and the pressure receiving part are arranged in sequence from bottom to top and connected with the elastic arm respectively, which includes that the lock tongue part is directly or indirectly connected with the elastic arm, or the pressure receiving part is directly or indirectly connected with the elastic arm, or another elastic part such as spring or torsion spring is used for elastic reset of the pressure receiving part or the lock tongue part.

[0050] In addition, for the matching side wall and V-shaped clamping groove clamping mode, in addition to using the inclined groove and inclined block, an outer edge can also be arranged on the outer side of the V-shaped clamping groove, and the matching side wall can also be limited by the outer edge, and the clamping mode can be arranged according to actual needs, and the above changes are all within the protection scope of the utility model.

[0051] As can be seen from the above, the fastener and the hanging rope can be loaded into the V-shaped clamping groove from the opening, and in the secondary locking state, not only the movement of the fastener in the vertical direction is limited by the lock tongue part, but also the lock block is moved close to the fastener by the magnetic connection, and the secondary locking of the lock tongue part is realized by the limiting of the lock block and the bottom wall, and the matching side wall and the V-shaped clamping groove are clamped, and after the hanging rope hangs the object, the gravity is used to provide stable locking force for the fastener, and when unlocking is needed, the lock block is first moved upward to enter the primary locking state, at this time, the pressure receiving part and the lock tongue part can move, and then the lock tongue part is separated from the fastener by driving, and then the unlocking state is entered, and the fastener moves to the wide end of the V-shaped clamping groove under the magnetic action, and the matching side wall of the fastener is separated from the wide end, so that the fastener and the hanging rope can be conveniently taken out of the V-shaped clamping groove, and the secondary locking is realized, and the fastener and the hanging rope can be conveniently and quickly disassembled.

Claims

1. A magnetic type quick release buckle with sliding lock, characterized in that, The quick release buckle comprises a buckle seat and a buckle, wherein the buckle seat is provided with a V-shaped slot, the narrow end of the V-shaped slot is located at the lower side, the wide end of the V-shaped slot is located at the upper side, the V-shaped slot is provided with a through hole at the lower side, the V-shaped slot is provided with a bottom wall at the inner side, and the V-shaped slot is provided with an opening at the outer side; the buckle is provided with two matching side walls at the opposite sides, the two matching side walls are arranged in a V shape, the buckle is provided with a hanging rope at the lower side between the two matching side walls, and the buckle is provided with a first magnet at the upper side; the buckle is located in the V-shaped slot, the matching side walls are clamped with the V-shaped slot, and the hanging rope passes through the through hole; the quick release buckle further comprises a lock, wherein the lock comprises a lock tongue, a pressure receiving part and an elastic part, the elastic part is connected with the buckle seat, the pressure receiving part is used to drive the lock tongue to move towards the inner side, the elastic part is used to drive the lock tongue to move towards the outer side, and the pressure receiving part is provided with a magnetically attracted part; the lock further comprises a lock block, wherein the lock block is provided with a second magnet at the lower side, the lock block is connected with the pressure receiving part and can move in the vertical direction; in the secondary locking state, the lock tongue is adjacent to the buckle and limits the movement of the buckle in the vertical direction, the lock block is close to the buckle, the first magnet is magnetically connected with the second magnet, the lock block is adjacent to the outer side of the bottom wall, and the lock block limits the movement of the lock tongue; in the primary locking state, the lock block is away from the buckle, the first magnet is separated from the second magnet, the second magnet is magnetically connected with the magnetically attracted part, and the lock block is separated from the bottom wall; in the unlocking state, the lock tongue is separated from the buckle, the buckle moves towards the wide end of the V-shaped slot in the vertical direction under the magnetic action, the buckle is close to the lock block, and the first magnet is magnetically connected with the second magnet.

2. The quick release buckle according to claim 1, wherein the elastic part is arranged in an elastic arm, the lock tongue and the pressure receiving part are arranged in sequence from the lower side to the upper side and are connected with the elastic arm respectively, the elastic arm is connected with the buckle seat, and the pressure receiving part is located above the buckle.

3. The quick release buckle according to claim 2, wherein the pressure receiving part is provided with a sliding groove extending in the vertical direction, the lock block is provided with a sliding block extending in the vertical direction, and the sliding block is in sliding cooperation with the sliding groove.

4. The quick release buckle according to claim 3, wherein the magnetically attracted part is a third magnet or a ferromagnetic metal part, the magnetically attracted part is located at the middle part of the pressure receiving part, and the magnetically attracted part is provided with the sliding groove at the horizontal two sides respectively; the lock block is provided with a matching groove above the second magnet, the matching groove is provided with the sliding block at the horizontal two sides respectively, and the magnetically attracted part is located in the matching groove.

5. The quick release buckle according to claim 4, wherein the lock block is provided with a lower limit wall below the matching groove; in the secondary locking state, the lower limit wall is adjacent to the outer side of the bottom wall. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ In the once-locked state, the lower limit wall is adjacent to the magnetically attracted portion.

6. The quick release buckle of claim 4, wherein: The lock piece includes a back plate, the pressure receiving portion and the lock tongue portion are located on the outer side of the back plate, and the elastic arm is connected between the back plate and the pressure receiving portion; The buckle seat is provided with a pressing window above the V-shaped clamping groove, the pressure receiving portion and the lock block are located in the pressing window, the back plate covers the inner side of the pressing window and is fixedly connected with the buckle seat.

7. The quick release buckle of claim 6, wherein: The matching groove is provided with a back limit block on the side close to the back plate, and the back limit block is adjacent to the back side of the elastic arm.

8. The quick release buckle of claim 2, wherein: The bottom wall is provided with a through hole, and the lock tongue portion extends into the V-shaped clamping groove from the back side through the through hole.

9. The quick release buckle of claim 8, wherein: The buckle is provided with a clamping groove on the inner side, and the lock tongue portion is detachably clamped with the clamping groove.

10. The quick release buckle of any one of claims 1 to 9, wherein: The V-shaped clamping groove is provided with a lock groove on each of the opposite sides, the lock grooves on the two sides are arranged in a V shape, each of the matching side walls is provided with a lock block, and the lock blocks on the two sides are arranged in a V shape, and the lock blocks are detachably clamped with the lock grooves.

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