Magnetic type quick release buckle

Abstract

The invention provides a magnetic type quick release buckle which comprises a buckle seat, a buckle piece and a button, the buckle seat is provided with a V-shaped clamping groove, a magnet is arranged above the buckle piece, the buckle piece is located in the V-shaped clamping groove and matched with a side wall to be clamped with the V-shaped clamping groove, a hanging rope penetrates through a through opening, the button comprises a spring bolt part, a pressing part and an elastic part, the elastic part is connected with the buckle seat, and the elastic part is connected with the buckle seat. The pressing part is used for driving the spring bolt part to move towards the inner side, the elastic part is used for driving the spring bolt part to elastically reset and move towards the outer side, in the locking state, the spring bolt part is adjacent to the fastener and limits movement of the fastener in the vertical direction, in the unlocking state, the spring bolt part is separated from the fastener, and the fastener moves towards the wide end of the V-shaped clamping groove in the vertical direction under the magnetic effect. In the unlocking state, the lock tongue part is driven to be separated from the fastener, the fastener moves towards the wide end of the V-shaped clamping groove under the magnetic effect, the wide end is separated from the matched side wall of the fastener, and therefore the fastener and the hanging rope can be conveniently taken out of the V-shaped clamping groove, and convenient and rapid disassembly is achieved.

Description

Technical Field

[0001] The invention relates to the field of connectors, and in particular to a magnetic quick-release buckle. Background Art

[0002] A buckle refers to a mechanical structure in which one part is embedded and connected with another part or is closed as a whole. It is very common in daily life and is often seen in the ropes of school bags, baby carriers, cameras, etc., where it plays a fixing role. Due to different application scenarios and customer needs, many different types of buckles have been developed, such as push-motion buckles, sliding buckles, magnetic buckles, etc., to meet different usage needs.

[0003] Due to the fragility of the camera itself and the fact that it is often used outdoors, in order to protect the camera and facilitate portability, the camera is often carried with a strap. To make the strap connection more convenient, a buckle connection is used to connect the camera and the strap. At the same time, the camera will continue to shake during outdoor use and the camera itself has a certain weight, so the buckle is required to have good connection strength to withstand a large pulling force. The buckle must also be able to be easily and quickly disassembled, thereby making the camera and other equipment more flexible in operation. Summary of the invention

[0004] The first object of the present invention is to provide a magnetic quick-release buckle.

[0005] In order to achieve the first objective of the present invention, the present invention provides a magnetic quick-release buckle, including a buckle seat, a buckle and a button, the buckle seat is provided with a V-shaped groove, the narrow end of the V-shaped groove is located at the bottom, the wide end of the V-shaped groove is located at the top, the narrow end of the V-shaped groove is vertically penetrated and provided with a through opening, the inner side of the V-shaped groove is provided with a bottom wall, the outer side of the V-shaped groove is provided with an opening, the buckle is provided with matching side walls on two opposite sides, the matching side walls on both sides are arranged in a V shape, and the buckle is provided with a hanging rope between the two matching side walls and at the tip below. The fastener is provided with a magnet on the top, and the fastener is located in the V-shaped groove, and the matching side wall is engaged with the V-shaped groove, and the lanyard passes through the through opening. The button includes a lock tongue part, a pressing part and an elastic part, and the elastic part is connected to the buckle seat. The pressing part is used to drive the lock tongue part to move inward, and the elastic part is used to drive the lock tongue part to elastically reset and move outward. In the locked state, the lock tongue part is adjacent to the fastener and restricts the movement of the fastener in the vertical direction. In the unlocked state, the lock tongue part is separated from the fastener, and the fastener moves in the vertical direction toward the wide end of the V-shaped groove under the action of magnetism.

[0006] It can be seen from the above scheme that the fastener and the lanyard can be loaded into the V-shaped slot from the opening. In the locked state, the lock tongue portion is used to restrict the movement of the fastener in the vertical direction, and then the fastener is located at the lower part of the V-shaped slot, and is engaged with the V-shaped slot by means of the matching side wall. After the lanyard is hung with an object, the effect of gravity is used to provide a stable locking force for the fastener. In the unlocked state, the lock tongue portion is driven to separate from the fastener, and the fastener moves toward the wide end of the V-shaped slot under the action of magnetism. The separation of the wide end from the matching side wall of the fastener is used, so that the fastener and the lanyard can be easily taken out of the V-shaped slot to achieve convenient and quick disassembly.

[0007] A further solution is that the elastic part is arranged as an elastic arm, the lock tongue part and the pressing part are arranged in sequence from bottom to top and are respectively connected to the elastic arms, the elastic arms are connected to the buckle seat, and the pressing part is located above the buckle.

[0008] As can be seen from the above, through the arrangement of the elastic arm, the pressing part can easily drive the lock tongue part to unlock, and the lock tongue part can also be locked and reset quickly and stably. A further solution is that the pressing portion is arranged to protrude outward, and the magnet is arranged on the upper end of the fastener and / or the pressing portion.

[0009] As can be seen from the above, the outer protrusion can facilitate the user's pressing operation, and the magnet can be selectively installed on the buckle and / or the pressing portion.

[0010] A further solution is that a baffle is provided between the buckle seat and the pressing portion, the buckle is magnetically attracted to the baffle, and the magnet is provided on the upper end of the buckle and / or the baffle.

[0011] As can be seen from the above, through the arrangement of the baffle, the fastener can stably move upward after the lock of the lock tongue portion is released.

[0012] A further solution is that a through hole is provided through the bottom wall, and the locking tongue portion passes through the through hole from the back side and extends into the V-shaped slot.

[0013] It can be seen from the above that the locking tongue portion passes through the through hole from the back side, and then the upper edge of the through hole is adjacent to the connection position of the locking tongue portion and the pressing portion.

[0014] A further solution is that the button includes a back plate, the pressing part and the locking tongue part are located on the outer side of the back plate, and the elastic arm is connected between the back plate and the pressing part; the buckle seat is provided with a pressing window above the V-shaped groove, the pressing part is located in the pressing window, and the back plate covers the inner side of the pressing window and is fixedly connected to the buckle seat.

[0015] As can be seen from the above, the arrangement of the back plate not only provides stable installation for the button and the elastic arm, but also facilitates the assembly and positioning of the button.

[0016] A further solution is that the locking tongue portion and the upper end portion of the fastener are detachably abutted and limited.

[0017] A further solution is that a locking groove is provided on the inner side of the fastener, and the locking tongue portion is detachably engaged with the locking groove.

[0018] As can be seen from the above, the lock tongue portion can be limited not only by the upper end portion of the fastener, but also by the locking slot of the fastener.

[0019] A further solution is that the buckle seat is provided with a positioning groove above the pressing window, a front stop wall is provided on the outer side of the positioning groove, the elastic arm is located in the positioning groove, and the elastic arm is adjacent to the front stop wall.

[0020] As can be seen from the above, the elastic arm can be limited to the left and right sides and the front side by the positioning groove and the front stop wall, so that the elastic reset of the elastic arm is more stable.

[0021] A further solution is that the V-shaped slot is provided with locking grooves on two opposite sides, the locking grooves on both sides are arranged in a V shape, and a locking block is provided on each side of the matching side wall, the locking blocks on both sides are arranged in a V shape, and the locking blocks are detachably engaged with the locking grooves.

[0022] As can be seen from the above, the locking force of the fastener can be further improved through the engagement of the locking block with the locking groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the first embodiment of the quick release buckle of the present invention.

[0024] Figure 2 It is a structural diagram of the first embodiment of the quick release buckle of the present invention from a back side perspective.

[0025] Figure 3 It is an exploded view of the first embodiment of the quick release buckle of the present invention.

[0026] Figure 4 It is an exploded view of the first embodiment of the quick release buckle of the present invention from a back side perspective.

[0027] Figure 5 It is a cross-sectional view of the first embodiment of the quick release buckle of the present invention in a locked state.

[0028] Figure 6 It is a cross-sectional view of the first embodiment of the quick-release buckle of the present invention in a separated state.

[0029] Figure 7 It is a cross-sectional view of the first embodiment of the quick release buckle of the present invention in the unlocked state.

[0030] Figure 8 It is a cross-sectional view of the first embodiment of the quick-release buckle of the present invention in a disengaged state.

[0031] Fig. 9 It is a structural diagram of a second embodiment of the quick release buckle of the present invention.

[0032] Fig.10 It is an exploded view of the second embodiment of the quick release buckle of the present invention.

[0033] Fig.11 It is a further exploded view of the second embodiment of the quick release buckle of the present invention.

[0034] Fig.12 1 is an exploded view of the second embodiment of the quick release buckle of the present invention from a back side perspective.

[0035] Fig.13 It is a cross-sectional view of the second embodiment of the quick release buckle of the present invention in a locked state.

[0036] Fig.14 It is a cross-sectional view of the second embodiment of the quick release buckle of the present invention in a separated state.

[0037] Fig.15 It is a cross-sectional view of the second embodiment of the quick release buckle of the present invention in the unlocked state.

[0038] Fig.16 It is a cross-sectional view of the second embodiment of the quick-release buckle of the present invention in a disengaged state.

[0039] Fig.17 It is a structural diagram of the third embodiment of the quick release buckle of the present invention.

[0040] Fig.18 It is an exploded view of the third embodiment of the quick release buckle of the present invention.

[0041] Fig.19 It is a further exploded view of the third embodiment of the quick release buckle of the present invention.

[0042] Fig. 20 1 is an exploded view of the third embodiment of the quick release buckle of the present invention from a back side perspective.

[0043] Fig.21 It is a cross-sectional view of the third embodiment of the quick release buckle of the present invention in a locked state.

[0044] Fig. 22 It is a cross-sectional view of the third embodiment of the quick-release buckle of the present invention in a separated state.

[0045] Fig.23 It is a cross-sectional view of the third embodiment of the quick release buckle of the present invention in the unlocked state.

[0046] Fig.24 It is a cross-sectional view of the third embodiment of the quick-release buckle of the present invention in a disengaged state.

[0047] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0048] First embodiment of quick release buckle: Reference Figures 1 to 8 The quick release buckle includes a buckle seat 1, a buckle 2, a button 3 and a back sticker 35. The buckle seat 1 is provided with a V-shaped groove 11, the narrow end of the V-shaped groove 11 is located at the bottom, and the wide end of the V-shaped groove 11 is located at the top. The V-shaped groove 11 is vertically penetrated with a through opening 113 along the narrow end below, and a bottom wall 114 is provided on the inner side of the V-shaped groove 11. The bottom wall 114 is penetrated with a through hole 115, and an opening is provided on the outer side of the V-shaped groove 11. The V-shaped groove 11 is respectively provided with locking grooves 112 on two opposite side walls 111, and the locking grooves 112 on both sides are arranged in a V shape. The buckle seat 1 is provided with a pressing window 117 above the V-shaped groove 11, and the pressing window 117 penetrates along the front-to-back direction. The buckle seat 1 is provided with a baffle 116 between the V-shaped groove 11 and the pressing window 117, and the through hole 115 is located at the top close to the baffle 116.

[0049] The buckle seat 1 is provided with a connecting portion 118 above the pressing window 117, and the connecting portion 118 is used to connect the shoulder strap and the binding strap. The buckle seat 1 is provided with a positioning groove 119 above the pressing window 117, and the positioning groove 119 is located on the inner side, and a front stop wall 120 is provided on the outer side of the positioning groove 119.

[0050] The fastener 2 is provided with matching side walls 21 on opposite sides, and the matching side walls 21 on both sides are arranged in a V-shape and are arranged narrow at the bottom and wide at the top. A locking block 22 is provided on each matching side wall 21, and the locking blocks 22 on both sides are arranged in a V-shape. The fastener 2 is provided with a hanging rope 24 between the two matching side walls 21 and at the tip below. The fastener 2 is provided with a magnet 23 at the upper end, and the magnet 23 faces the baffle 116. The baffle 116 can be provided with a magnet, or the baffle 116 is made of metal materials such as iron, nickel, and cobalt, or the baffle 116 is provided with a magnetic attraction plate of metal materials such as iron, nickel, and cobalt, which can realize the fastener 2 to move toward the wide end of the V-shaped groove 11 in the vertical direction under the action of magnetism. The fastener 2 is located in the V-shaped groove 11, the matching side wall 21 is engaged with the V-shaped groove 11, the locking block 22 is detachably engaged with the lock groove 112, and the hanging rope 24 passes through the through opening 113.

[0051] The button 3 includes a locking tongue portion 31, a pressing portion 32, an elastic portion and a back plate 34. In the present embodiment, the elastic portion is arranged in the form of an elastic arm 33. The locking tongue portion 31, the pressing portion 32 and the elastic arm 33 are sequentially connected from bottom to top. The pressing portion 32, the locking tongue portion 31 and the elastic arm 33 are located on 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 pressing portion 32. The pressing portion 32 is arranged in a U shape protruding outward, and the locking tongue portion 31 is arranged tilted outward.

[0052] The lock tongue portion 31 extends from the back side through the through hole 115 into the V-shaped slot 11, the upper edge of the through hole 115 is adjacent to the connection portion between the lock tongue portion 31 and the pressing portion 32, the pressing portion 32 is located in the pressing window 117, the baffle 116 is located between the buckle 2 and the pressing portion 32, the elastic arm 33 is located in the positioning groove 119, the elastic arm 33 is adjacent to the front baffle wall 120, the back plate 34 covers the inner side of the pressing window 117 and is fixedly connected to the buckle seat 1, and the back side of the back plate 34 is also fitted with a back sticker 35. By pressing the pressing portion 32 inwardly, the pressing portion 32 drives the lock tongue portion 31 to move inwardly, and under the elastic recovery of the elastic arm 33, the elastic arm 33 drives the lock tongue portion 31 to elastically reset and move outward.

[0053] Reference Figure 5 In the locked state, the pressing portion 32 is located above the buckle 2, the locking tongue portion 31 is adjacent to the buckle 2 and restricts the vertical movement of the buckle 2, and at this time, the magnet 23 is separated from the baffle 116.

[0054] Reference Figure 6 , the pressing portion 32 is pressed inwardly, and the pressing portion 32 drives the locking tongue portion 31 to move inwardly, and then the locking tongue portion 31 is separated from the buckle 2, referring to Figure 7 At this time, the fastener 2 moves vertically toward the wide end of the V-shaped groove 11 under the action of magnetism, and the magnet 23 is magnetically adjacent to the baffle 116.

[0055] Reference Figure 8 , and then release the external force of the pressing portion 32. Under the elastic recovery of the elastic arm 33, the elastic arm 33 drives the lock tongue portion 31 to elastically return to the outside, and then while maintaining the magnetic contact, the lock tongue portion 31 can drive the fastener 2 to move outward, making it easier for the user to take away the fastener 2.

[0056] Second embodiment of quick release buckle: Reference Figures 9 to 16 On the basis of the first embodiment of the quick release buckle, the second embodiment of the quick release buckle mainly modifies the baffle 116 and the slot 25. Specifically, the buckle seat 1 of the second embodiment is not provided with the baffle 116, that is, the pressing window 117 of the buckle seat 1 is connected with the V-shaped slot 11 in an up-down manner. The button 3 can be made of metal materials such as iron, nickel, and cobalt, or the pressing portion 32 of the button 3 is provided with a magnetic plate made of metal materials such as iron, nickel, and cobalt, or a magnet is provided on the pressing portion 32, which can realize the movement of the fastener 2 toward the wide end of the V-shaped slot 11 in the vertical direction under the action of magnetism. The fastener 2 is provided with a slot 25 on the inner side, and the locking tongue portion 31 is detachably engaged with the slot 25, and then the locking tongue portion 31 is adjacent to the fastener 2 and restricts the movement of the fastener 2 in the vertical direction.

[0057] Reference Fig.13In the locked state, the locking tongue portion 31 is engaged with the card slot 25, the locking tongue portion 31 is adjacent to the buckle 2 and restricts the movement of the buckle 2 in the vertical direction. At this time, the magnet 23 is separated from the pressing portion 32.

[0058] Reference Fig.14 , the pressing portion 32 is pressed inwardly, and the pressing portion 32 drives the locking tongue portion 31 to move inwardly, and then the locking tongue portion 31 is separated from the card slot 25 and also separated from the buckle 2, referring to Fig.15 At this time, the fastener 2 moves in the vertical direction toward the wide end of the V-shaped groove 11 under the effect of magnetism, and the magnet 23 is magnetically adjacent to the pressing portion 32 .

[0059] Reference Fig.16 , and then release the external force of the pressing portion 32. Under the elastic recovery of the elastic arm 33, the elastic arm 33 drives the lock tongue portion 31 to elastically return to the outside, and then while maintaining the magnetic contact, the lock tongue portion 31 can drive the fastener 2 to move outward, making it easier for the user to take away the fastener 2.

[0060] The third embodiment of the quick release buckle: Reference Figures 17 to 24 On the basis of the second embodiment of the quick release buckle, the third embodiment of the quick release buckle mainly modifies the pressing portion 36. Specifically, the elastic portion of the button 3 of the third embodiment is arranged in the form of an elastic arm 33, and the elastic arm 33 is arranged in a relatively long manner. The lock tongue portion 31 and the pressing portion 36 are arranged in sequence from bottom to top and are respectively connected to the elastic arm 33. The pressing portion 36 is arranged in the form of a convex block protruding outward. A magnet 37 is provided at the lower end of the pressing portion 36, and the magnet 37 is opposite to the magnet 23. The pressing portion 36 is fixedly connected by a screw through a through hole 343, and the back plate 34 is fixedly connected to the back of the buckle seat 1 through a through hole 341 and a screw 342.

[0061] The buckle seat 1 is not provided with a baffle 116, that is, the pressing window 117 of the buckle seat 1 is connected with the V-shaped groove 11 in an upper and lower arrangement. The pressing portion 36 can be an injection molded part, and the magnet 37 and the magnet 23 are opposite to each other to realize that the buckle 2 moves toward the wide end of the V-shaped groove 11 in the vertical direction under the action of magnetism. The buckle 2 is provided with a groove 25 on the inner side, and the locking tongue portion 31 is detachably engaged with the groove 25, and then the locking tongue portion 31 is adjacent to the buckle 2 and restricts the buckle 2 from moving in the vertical direction.

[0062] Reference Fig. 20 In the locked state, the locking tongue portion 31 is engaged with the card slot 25, the locking tongue portion 31 is adjacent to the buckle 2 and restricts the movement of the buckle 2 in the vertical direction. At this time, the magnet 23 is separated from the pressing portion 36.

[0063] Reference Fig.21, the pressing portion 32 is pressed inwardly, and the pressing portion 32 drives the locking tongue portion 31 to move inwardly, and then the locking tongue portion 31 is separated from the card slot 25 and also separated from the buckle 2, referring to Fig.23 At this time, the fastener 2 moves vertically toward the wide end of the V-shaped groove 11 under the mutual magnetic attraction between the magnet 37 and the magnet 23 , and the magnet 23 is magnetically adjacent to the pressing portion 36 .

[0064] Reference Fig.24 , and then release the external force of the pressing portion 32. Under the elastic recovery of the elastic arm 33, the elastic arm 33 drives the lock tongue portion 31 to elastically return to the outside, and then while maintaining the magnetic contact, the lock tongue portion 31 can drive the fastener 2 to move outward, making it easier for the user to take away the fastener 2.

[0065] Of course, the above embodiments are only preferred embodiments of the present case. In specific applications, more changes can be made. For example, the elastic arm can be directly connected to the buckle seat, which can also apply elastic restoring force to the pressing part or the lock tongue part, or the elastic part can also be arranged in the form of a spring or a torsion spring, the spring can abut the pressing part or the lock tongue part, and the torsion spring can also be connected to the pressing part or the lock tongue part, which can also realize that the elastic part is used to drive the lock tongue part 31 to elastically return to the outside.

[0066] Furthermore, the locking tongue portion and the pressing portion are arranged in sequence from bottom to top and are respectively connected to the elastic arms, which includes the locking tongue portion being directly or indirectly connected to the elastic arm, or the pressing portion being directly or indirectly connected to the elastic arm, or another elastic portion, such as a spring or a torsion spring, is used to reset the pressing portion or the locking tongue portion.

[0067] Also, with regard to the setting of the magnet, the fastener is provided with a magnet on the top, and its forms include providing a magnet at the upper end of the fastener, or providing a magnet on the baffle of the buckle seat, or providing a magnet on the pressing portion, all of which can achieve that when in the unlocked state, the fastener moves in the vertical direction toward the wide end of the V-shaped slot under the action of magnetism.

[0068] Furthermore, with regard to the engagement method between the mating side wall and the V-shaped groove, in addition to using inclined grooves and inclined blocks, an outer edge can also be set on the outer side of the V-shaped groove, and the mating side wall can also be limited by the outer edge. The engagement method can be arranged according to actual needs with conventional blocks and grooves. The above-mentioned modifications are all within the protection scope of the present invention.

[0069] As can be seen from the above, in the locked state, the locking tongue portion is used to restrict the vertical movement of the fastener, and then the fastener is located at the lower part of the V-shaped groove, and is engaged with the V-shaped groove by means of the matching side wall. After the object is hung on the lanyard, the effect of gravity is used to provide a stable locking force for the fastener. In the unlocked state, the locking tongue portion is driven to separate from the fastener, and the fastener moves toward the wide end of the V-shaped groove under the action of magnetism. The separation of the wide end and the matching side wall of the fastener is used, so that the fastener and the lanyard can be easily removed from the V-shaped groove to achieve convenient and quick disassembly.

Claims

1. A magnetic quick-release buckle, characterized in that: include: A buckle seat, wherein the buckle seat is provided with a V-shaped groove, wherein the narrow end of the V-shaped groove is located at the bottom, and the wide end of the V-shaped groove is located at the top, and the V-shaped groove is provided with a through opening vertically running through the narrow end and downward, and the inner side of the V-shaped groove is provided with a bottom wall, and the outer side of the V-shaped groove is provided with an opening; A fastener, wherein the fastener is provided with matching side walls on two opposite sides, the matching side walls on both sides are arranged in a V-shape, the fastener is provided with a hanging rope between the two matching side walls and at the tip below, the fastener is provided with a magnet on the top, the fastener is located in the V-shaped slot, the matching side walls are engaged with the V-shaped slot, and the hanging rope passes through the through opening; A button, the button comprising a locking tongue portion, a pressing portion and an elastic portion, the elastic portion being connected to the buckle seat, the pressing portion being used to drive the locking tongue portion to move inward, and the elastic portion being used to drive the locking tongue portion to elastically return to the outside; In the locked state, the locking tongue portion is adjacent to the buckle and restricts the buckle from moving in the vertical direction; In the unlocked state, the locking tongue portion is separated from the buckle, and the buckle moves toward the wide end of the V-shaped slot along the vertical direction under the action of magnetism.

2. The quick release buckle according to claim 1, characterized in that: The elastic part is arranged in the form of an elastic arm, the locking tongue part and the pressing part are arranged in sequence from bottom to top and are respectively connected to the elastic arms, the elastic arms are connected to the buckle seat, and the pressing part is located above the buckle.

3. The quick release buckle according to claim 2, characterized in that: The pressing portion is arranged to protrude outward, and the magnet is arranged on the upper end of the buckle and / or the pressing portion.

4. The quick release buckle according to claim 2, characterized in that: The buckle seat is provided with a baffle between the buckle and the pressing portion, the buckle is magnetically attracted to the baffle, and the magnet is provided on the upper end of the buckle and / or the baffle.

5. The quick release buckle according to claim 2, characterized in that: The bottom wall is penetrated by a through hole, and the locking tongue portion passes through the through hole from the back side and extends into the V-shaped slot.

6. The quick release buckle according to claim 5, characterized in that: The button comprises a back plate, the pressing portion and the locking tongue portion are located on the outer side of the back plate, and the elastic arm is connected between the back plate and the pressing portion; The buckle seat is provided with a pressing window above the V-shaped slot, the pressing portion is located in the pressing window, and the back plate covers the inner side of the pressing window and is fixedly connected to the buckle seat.

7. The quick release buckle according to claim 6, characterized in that: The locking tongue portion and the upper end portion of the buckle are detachably adjacent to each other and limited.

8. The quick release buckle according to claim 6, characterized in that: The buckle is provided with a slot on the inner side, and the locking tongue portion is detachably engaged with the slot.

9. The quick release buckle according to claim 6, characterized in that: The buckle seat is provided with a positioning groove above the pressing window, and a front stop wall is provided on the outer side of the positioning groove. The elastic arm is located in the positioning groove, and the elastic arm is adjacent to the front stop wall.

10. The quick release buckle according to any one of claims 1 to 9, characterized in that: The V-shaped slot is provided with locking grooves on two opposite sides, the locking grooves on both sides are arranged in a V shape, and the matching side walls on each side are provided with locking blocks, the locking blocks on both sides are arranged in a V shape, and the locking blocks are detachably engaged with the locking grooves.

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