Quick-release base and quick-release assembly

Abstract

The quick release base comprises a shell, a buckling assembly and a sleeving assembly, a first screw hole is formed in the outer side wall of the shell, the buckling assembly comprises two clamping buckles and two elastic pieces, the two clamping buckles are symmetrically hinged to the left end and the right end of the shell, the bent ends of the clamping buckles cross the inner side wall of the shell, and the two elastic pieces are arranged on the outer side wall of the shell. The sleeve assembly comprises two turning pieces, the two turning pieces are symmetrically hinged to the outer side walls of the left end and the right end of the shell, sleeve holes penetrating through the two side walls of the turning pieces are formed in the turning pieces, and the screw rod at the connecting end of the support can be directly screwed into the first screw hole. Therefore, the support and the motion camera are connected through the quick-release base, or the quick-release base is sleeved with the two sleeving holes in a penetrating mode, the turning piece is tightly pressed on the end portion of the support through the nut, the support and the motion camera are connected through the quick-release base, and limitation of the motion camera when connecting accessories are selected is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of camera accessories, in particular to a quick-release base and a quick-release assembly. Background Art

[0002] Action cameras usually need to be used with a bracket. There are roughly three common ways to connect action cameras and brackets on the market. One is that a threaded hole is provided on the bottom side of the action camera, and the bracket is directly threadedly connected to the threaded hole through a screw. The other is that a symmetrical flap is provided on the bottom side of the action camera, and the flap can be flipped to be parallel to each other. The flaps are provided with mounting holes, and the screws vertically arranged at the ends of the bracket can be inserted into the mounting holes and tightened with nuts to fix the bracket and the flap. The last one is that a buckle is provided on the bottom side of the action camera, and a quick-release base is installed on the end of the bracket. The buckle on the quick-release base can be engaged with the buckle, thereby fixing the bracket and the action camera.

[0003] However, most of the sports cameras on the market currently have only one connection method, which is easily limited in the choice of connection accessories. At the same time, the width of the general quick-release base is large and cannot adapt to the opening reserved for the case accessories of the sports camera, resulting in that the sports camera using the case cannot be connected to the quick-release base for use, and the practicality is poor. Utility Model Content

[0004] In view of this, the utility model provides a quick-release base and a quick-release assembly, which are used to solve the problem that most sports cameras in the prior art only have one connection method and are easily limited in the selection of connecting accessories. At the same time, the width of the general quick-release base is large and cannot adapt to the opening reserved for the case accessories of the sports camera, resulting in the sports camera using the case being unable to be connected to the quick-release base for use, resulting in poor practicality.

[0005] In order to achieve one or part or all of the above-mentioned purposes or other purposes, the utility model proposes a quick-release base, including a shell, a buckling assembly and a sleeve assembly, a positioning block is provided on the inner side wall of the shell, a first screw hole is provided on the outer side wall of the shell, the buckling assembly includes two buckles and two elastic members, the two buckles are symmetrically hinged on the left and right ends of the shell, the bent ends of the buckles pass over the inner side wall of the shell, the elastic members are arranged in a one-to-one correspondence with the buckles, and the elastic members are used to drive the bent ends of the corresponding buckles to swing toward their clamping directions, the sleeve assembly includes two flaps, the two flaps are symmetrically hinged on the outer side walls of the left and right ends of the shell, the flaps are provided with sleeve holes that pass through the two side walls, and the two end walls of the flaps perpendicular to their hinge axes are flush with the corresponding side walls of the shell respectively, and the two flaps can be flipped around the hinge ends to fit the outer side walls of the shell, or flipped around the hinge ends to be perpendicular to the outer side walls of the shell.

[0006] Preferably, the socket assembly also includes a mounting plate, which is detachably mounted on the outer side wall of the shell, a stop block is provided in the middle of one side wall of the mounting plate facing outward, the first screw hole is provided at the end of the stop block away from the mounting plate, hinge blocks are symmetrically provided on both sides of the stop block, the flap corresponds to the hinge blocks one by one, a notch is provided at one end of the flap, the hinge block is located in the corresponding notch, and the left and right ends of the hinge block are respectively hinged to the inner walls on both sides of the notch.

[0007] Preferably, a receiving groove is provided in the middle of the outer side wall of the shell, and the mounting piece is arranged in the receiving groove.

[0008] Preferably, both left and right ends of the hinge block are vertically provided with pins, and the pins respectively penetrate the corresponding inner walls of the notch and are rotatably connected to the ends of the flaps.

[0009] Preferably, the side wall of the pin shaft is provided with a serration structure along the circumferential direction.

[0010] Preferably, the positioning block is columnar, vertically arranged on the inner wall of the shell, and one end of the positioning block away from the shell is conical.

[0011] Preferably, the hook tips of the bent ends of the buckle are arranged to face away from each other.

[0012] Preferably, mounting grooves are symmetrically provided at the left and right ends of the shell, and an avoidance opening connected to the mounting groove is provided on the inner side wall of the shell, the buckles and elastic members are arranged in one-to-one correspondence with the mounting grooves, and a rotating shaft is connected between the left and right inner walls of the mounting groove, one end of the buckle is rotatably sleeved on the rotating shaft, and the bent end of the buckle passes through the avoidance opening to the outside of the shell, and a button that passes over the mounting groove opening to the outside is provided on the outward side of the buckle, and the elastic member is arranged on the inner side wall of the corresponding mounting groove, one end of the elastic member is connected to the inner side wall of the mounting groove, and the other end of the elastic member is connected to the buckle.

[0013] Preferably, two first magnets are provided in the middle of the shell, and the two first magnets are distributed along the length direction of the shell.

[0014] A quick-release assembly comprises a quick-release base and a connecting plate, wherein buckles are symmetrically arranged at both ends of the connecting plate, a positioning hole is arranged on the outer wall of the connecting plate, a second screw hole is arranged in the middle of the outer wall of the connecting plate, the positioning block can be slidably inserted into the positioning hole, and when the positioning block is slidably connected to the positioning hole, the buckle can be engaged with the buckle position one by one.

[0015] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0016] After adopting the above-mentioned quick-release base and quick-release assembly, taking the sports camera and external accessories with buckles on the bottom side as an example, the positioning block can be inserted into the hole on the bottom side of the sports camera to limit the horizontal movement of the shell, and the two buckles can be respectively engaged with the corresponding buckles to limit the movement of the shell in the vertical direction, so that the shell is fixedly connected to the bottom side of the sports camera. The user can choose an adaptive connection method according to the actual situation of the bracket. When the connecting end of the bracket is provided with a coaxial screw, the screw can be directly screwed into the first screw hole, so as to connect the bracket and the sports camera through the quick-release base. When the connecting end of the bracket is provided with a screw perpendicular to the axis, the user can flip the flaps to make the two flaps flip to be perpendicular to the outer wall of the shell. At this time, the two flaps are parallel to each other, and the two socket holes are coaxial. The user can insert the screw into the two socket holes at the same time, and then screw the nut on the passing end of the screw, and use the nut to rotate and squeeze it The quick-release base is used to connect the bracket and the action camera, thereby reducing the restrictions on the action camera when selecting connection accessories, expanding the connection method of the action camera, and improving the user experience. At the same time, a storage groove for storing the flap is usually provided on the outer wall of the common shell, and a pin is used to penetrate the front and rear side walls of the shell, the hinged end of the flap and the hinge block at the same time, so that the three are rotatably connected. However, this also increases the thickness of the shell, resulting in the shell being unable to adapt to the opening reserved for shell accessories. The shell of the present invention removes the storage groove, and the flap is only hinged to the hinge block, so that the front and rear side walls of the shell are flush with the side walls of the flap. Without changing the size of the flap, the size of the shell is reduced, so that the quick-release base can adapt to the opening reserved for shell accessories, so that the two can be used compatibly, thereby improving the applicability of the quick-release base. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] in:

[0019] Figure 1 It is an exploded view of the quick-release base, quick-release assembly and bracket in the utility model;

[0020] Figure 2 The utility model is a quick release base and quick release assembly explosion Figure 1 ;

[0021] Figure 3 The utility model is a quick release base and quick release assembly explosion Figure 2 .

[0022] In the figure: 1. shell; 11. positioning block; 12. accommodating groove; 13. installation groove; 14. avoidance opening; 15. rotating shaft; 2. buckle; 21. button; 3. elastic member; 4. flap; 41. socket hole; 42. notch; 5. installation sheet; 51. stopper; 52. first screw hole; 53. hinge block; 54. pin; 61. first magnet; 62. second magnet; 63. third magnet; 7. connecting plate; 71. buckle position; 72. positioning hole; 73. second screw hole; 8. anti-slip pad. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0026] like Figure 1-3As shown, a quick-release base includes a shell 1, a buckling assembly and a sleeve assembly, a positioning block 11 is provided on the inner wall of the shell 1, a first screw hole 52 is provided on the outer wall of the shell 1, the buckling assembly includes two buckles 2 and two elastic members 3, the two buckles 2 are symmetrically hinged on the left and right ends of the shell 1, the bent ends of the buckles 2 pass over the inner wall of the shell 1, the elastic members 3 are arranged in a one-to-one correspondence with the buckles 2, and the elastic members 3 are used to drive the bent ends of the corresponding buckles 2 to swing in their clamping directions, and the sleeve assembly includes two flaps 4, the two flaps 4 are symmetrically hinged on the outer walls of the left and right ends of the shell 1, the flaps 4 are provided with sleeve holes 41 passing through the two side walls thereof, and the two end walls of the flaps 4 perpendicular to the hinge axis thereof are flush with the corresponding side walls of the shell 1 respectively, and the two flaps 4 can be flipped around the hinge ends to fit the outer wall of the shell 1, or flipped around the hinge ends to be perpendicular to the outer wall of the shell 1.

[0027] Specifically, the shell 1 is in the shape of a rectangular block, which is compatible with the bottom groove of sports cameras on the market. The hinge axis of the buckle 2 and the hinge axis of the flap 4 are both in the same direction as the width direction of the shell 1; the inner wall of the shell 1 refers to a side wall of the shell 1 facing the bottom side of the sports camera when the buckle 2 is engaged with the bottom side buckle position 71 of the sports camera, and the outer wall of the shell 1 refers to a side wall opposite to its inner wall.

[0028] In this embodiment, the sports camera and external accessories with buckle positions 71 on the bottom side are used as an example of a bracket. The positioning block 11 can be inserted into the hole on the bottom side of the sports camera to limit the horizontal movement of the shell 1. The two buckles 2 can be respectively engaged with the corresponding buckle positions 71 to limit the movement of the shell 1 in the vertical direction, so that the shell 1 is fixedly connected to the bottom side of the sports camera. The user can select an adaptive connection method according to the actual situation of the bracket. When the connecting end of the bracket is provided with a coaxial screw, the screw can be directly screwed into the first screw hole 52, so as to connect the bracket and the sports camera through the quick-release base. When the connecting end of the bracket is provided with a screw perpendicular to the first screw hole 52, the bracket and the sports camera are connected. When the screw rod is aligned with the axis of the bracket, the user can flip the flaps 4 to make the two flaps 4 flip to be perpendicular to the outer wall of the housing 1. At this time, the two flaps 4 are parallel to each other, and the two sleeve holes 41 are coaxial. The user can simultaneously insert the screw rod into the two sleeve holes 41, and then screw the nut on the through end of the screw rod, and use the nut to rotate and squeeze one of the flaps 4, and press the other flap 4 on the end of the bracket, so as to limit the relative rotation of the screw rod and the flap 4 by friction, and connect the bracket and the action camera through the quick-release base, so as to reduce the restrictions on the action camera when selecting connection accessories, expand the connection method of the action camera, and improve the user experience;

[0029] At the same time, a common outer wall of the shell 1 is usually provided with a storage groove for storing the flap 4, and a pin is used to penetrate the front and rear side walls of the shell 1, the hinged end of the flap 4 and the hinge block 53 at the same time, so that the three are rotatably connected. However, this also increases the thickness of the shell 1, resulting in the shell 1 being unable to adapt to the opening reserved for shell accessories. The shell 1 of the present invention removes the storage groove, and the flap 4 is only hinged to the hinge block 53, so that the front and rear side walls of the shell 1 are flush with the side walls of the flap 4. Without changing the size of the flap 4, the size of the shell 1 is reduced, so that the quick-release base can adapt to the opening reserved for shell accessories, so that the two can be used compatibly, thereby improving the applicability of the quick-release base.

[0030] Furthermore, the sleeve assembly also includes a mounting plate 5, which is detachably mounted on the outer side wall of the shell 1 by screws. A stopper 51 is provided in the middle of one side wall of the mounting plate 5 facing outward, and a first screw hole 52 is provided at one end of the stopper 51 away from the mounting plate 5. Hinge blocks 53 are symmetrically provided on both sides of the stopper 51. The flap 4 corresponds to the hinge blocks 53 one by one. A notch 42 is provided at one end of the flap 4, and the hinge block 53 is located in the corresponding notch 42. The left and right ends of the hinge block 53 are respectively hinged to the inner walls of the notch 42 on both sides. The flap 4 can be flipped around the corresponding hinge block 53. When the flap 4 is flipped to be perpendicular to the outer side wall of the shell 1, the outer side wall of the flap 4 will abut against the stopper 51 to limit the further flipping of the flap 4 through the stopper 51. When it is subsequently connected to the screw rod, the stopper 51 will provide support force for the flap 4 so that the two flaps 4 remain parallel when the nut is tightened.

[0031] Furthermore, a receiving groove 12 penetrating through the front and rear side walls is provided in the middle of the outer side wall of the housing 1, and the mounting plate 5 can be clamped in the receiving groove 12 so that the mounting plate 5 is aligned and mounted on the bottom wall of the receiving groove 12 by screws.

[0032] Furthermore, pins 54 are vertically provided at both ends of the hinge block 53 . The pins 54 penetrate the inner walls of the corresponding notches 42 and are rotatably connected to the ends of the flaps 4 , so that the flaps 4 can be turned over with the pins 54 as the rotation axis 15 .

[0033] Furthermore, a serration structure is provided on the side wall of the pin shaft 54 ​​along the circumferential direction. When the end of the flap 4 is sleeved on the pin shaft 54, the serration structure will squeeze the inner wall of the adapter hole at the end of the flap 4, thereby increasing the rotational resistance between the pin shaft 54 ​​and the flap 4. When the two flaps are parallel to each other and perpendicular to the outer wall of the shell 1, they can be kept suspended by the serration structure, thereby freeing the user's hands, so that the user can insert the screw rod vertically arranged at the end of the bracket into the sleeve hole 41, thereby reducing the difficulty of the connection operation between the flap 4 and the screw rod.

[0034] In one embodiment, the inner wall of the transfer hole at the end of the flap 4 may be provided with teeth grooves along the circumferential direction, and the serration structure engages with the teeth grooves, thereby further increasing the rotational resistance between the pin shaft 54 ​​and the flap 4 (not shown in the drawings).

[0035] Furthermore, the positioning block 11 is columnar, vertically arranged on the inner wall of the shell 1, and its end away from the shell 1 is conical, so that the positioning block 11 can be inserted into the corresponding hole for positioning on the bottom side of the sports camera through the tip.

[0036] Furthermore, in the present embodiment, the hook tips of the bent ends of the buckle 2 are preferably arranged to face away from each other. Of course, according to actual use requirements, the hook tips of the bent ends of the buckle 2 can also be arranged to face each other.

[0037] Furthermore, mounting grooves 13 are symmetrically provided at the left and right ends of the shell 1, and an avoidance opening 14 connected to the mounting groove 13 is provided on the inner side wall of the shell 1. The buckle 2 and the elastic member 3 are arranged in a one-to-one correspondence with the mounting groove 13. A rotating shaft 15 is connected between the left and right inner walls of the mounting groove 13. One end of the buckle 2 is rotatably sleeved on the rotating shaft 15, and the bent end of the buckle 2 passes through the avoidance opening 14 to the outside of the shell 1. A button 21 is provided on the outward side of the buckle 2, which crosses the mounting groove 13 and opens to the outside. The elastic member 3 is arranged on the inner side wall of the corresponding mounting groove 13, one end of the elastic member 3 is connected to the inner side wall of the mounting groove 13, and the other end of the elastic member 3 is connected to the buckle 2.

[0038] In this embodiment, the elastic member 3 is a spring. When the quick-release base needs to be connected to the buckle position 71 on the bottom side of the action camera, the two buttons 21 can be pinched at the same time, and the two buckles 2 can be driven by the buttons 21 to swing toward each other around the hinged ends at the same time. At this time, the buckle 2 will squeeze the corresponding elastic member 3, and the elastic member 3 will deform and store energy, and then the bent end of the buckle 2 will be extended into the corresponding buckle position 71. Finally, the pressure applied to the button 21 is released, and the elastic member 3 will release the energy and reset, driving the buckle 2 to reset and swing, so that the hook tip of the bent end of the buckle 2 is hooked with the corresponding buckle position 71, thereby limiting the quick-release base from moving away from the action camera, and cooperating with the positioning block 11 to limit the movement of the quick-release base in the direction of the surface where the bottom side of the action camera is located, so that the quick-release base is completely fixed and connected to the bottom side of the action camera. The same is true when the quick-release base is disassembled.

[0039] Furthermore, two first magnets 61 are provided in the middle of the shell 1 , and the two first magnets 61 are distributed along the length direction of the shell 1 .

[0040] In this embodiment, a second magnet 62 is further provided on the flap 4. When the flap 4 is turned over and laid flat on the outer wall of the shell 1, the second magnet 62 can be attracted by the first magnet 61, thereby limiting the swing of the flap 4 through magnetic attraction, so that the flap 4 can be positioned and placed.

[0041] A quick-release assembly includes a quick-release base and a connecting plate 7, buckles 71 are symmetrically provided at both ends of the connecting plate 7, a positioning hole 72 is provided on the outer wall of the connecting plate 7, a second screw hole 73 is provided in the middle of the outer wall of the connecting plate 7, a positioning block 11 can be slidably inserted into the positioning hole 72, and when the positioning block 11 is slidably connected with the positioning hole 72, the buckle 2 can be snap-connected with the buckle 71 one by one.

[0042] Specifically, a third magnet 63 is provided in the connecting plate 7 corresponding to the first magnet 61 one by one, and the third magnet 63 can be adsorbed with the first magnet 61 one by one to assist in positioning the quick-release base and the connecting plate 7, and help align the positioning block 11 with the positioning hole 72, and the buckle 2 with the buckle position 71; an anti-slip pad 8 is provided on the inner side wall of the shell 1, so as to increase the friction resistance between the connecting plate 7 through the anti-slip pad 8, and further improve the installation stability of the quick-release base.

[0043] In this embodiment, the connecting plate 7 can be detachably fixed to the bottom wall of the bottom groove of the action camera by screws. Taking the external accessory as a bracket as an example, when the user chooses to use a quick-release base to connect the bracket, first screw the screw at the top of the bracket with the first screw hole 52 of the shell 1, and fix the quick-release base on the top of the bracket. Then, insert the positioning block 11 into the positioning hole 72 of the connecting plate 7, and make the buckle 2 engage with the buckle position 71, so that the action camera and the bracket can be quickly connected through the connecting plate 7 and the quick-release base. The user can also screw the screw at the end of the bracket with the second screw hole 73 to make the bracket directly fixedly connected to the connecting plate 7.

[0044] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A quick-release base, characterized in that: include: Shell, snap-fit ​​assembly and socket assembly; A positioning block is provided on the inner wall of the shell, and a first screw hole is provided on the outer wall of the shell; The buckle assembly includes two buckles and two elastic members, the two buckles are symmetrically hinged on the left and right ends of the shell, the bent ends of the buckles go over the inner side wall of the shell, the elastic members are arranged one by one with the buckles, and the elastic members are used to drive the bent ends of the corresponding buckles to swing towards their clamping direction; The sleeve assembly includes two flaps, which are symmetrically hinged on the outer side walls of the left and right ends of the shell, and the flaps are provided with sleeve holes that pass through the two side walls thereof, and the two end walls of the flaps that are perpendicular to the hinge axis are flush with the corresponding side walls of the shell respectively; The two flaps can be turned around the hinged end to fit the outer side wall of the shell, or turned around the hinged end to be perpendicular to the outer side wall of the shell.

2. A quick-release base according to claim 1, characterized in that: The socket assembly also includes a mounting plate, which is detachably mounted on the outer side wall of the shell, a stopper is provided in the middle of one side wall of the mounting plate facing outward, the first screw hole is arranged at an end of the stopper away from the mounting plate, hinge blocks are symmetrically provided on both sides of the stopper, the flap corresponds to the hinge block one by one, a notch is provided at one end of the flap, the hinge block is located in the corresponding notch, and the left and right ends of the hinge block are respectively hinged to the inner walls on both sides of the notch.

3. A quick-release base according to claim 2, characterized in that: A receiving groove is provided in the middle of the outer side wall of the shell, and the mounting piece is arranged in the receiving groove.

4. The quick-release base according to claim 2, characterized in that: The left and right ends of the hinge block are vertically provided with pin shafts, and the pin shafts respectively penetrate the inner walls of the corresponding notches and are rotatably connected with the ends of the flaps.

5. A quick-release base according to claim 4, characterized in that: The side wall of the pin shaft is provided with a sawtooth structure along the circumferential direction.

6. The quick-release base according to claim 1, characterized in that: The positioning block is columnar, vertically arranged on the inner side wall of the shell, and one end of the positioning block away from the shell is cone-shaped.

7. The quick-release base according to claim 1, characterized in that: The hook tips of the bent ends of the buckles are arranged to face away from each other.

8. The quick-release base according to claim 1, characterized in that: The left and right ends of the shell are symmetrically provided with mounting grooves, and the inner side wall of the shell is provided with an escape opening connected to the mounting grooves; The buckle and elastic member are arranged in one-to-one correspondence with the mounting groove, a rotating shaft is connected between the left and right inner walls of the mounting groove, one end of the buckle is rotatably sleeved on the rotating shaft, the bent end of the buckle passes through the avoidance opening to the outside of the shell, and the outward side of the buckle is provided with a button that passes over the mounting groove opening to the outside, the elastic member is arranged on the inner side wall of the corresponding mounting groove, one end of the elastic member is connected to the inner side wall of the mounting groove, and the other end of the elastic member is connected to the buckle.

9. The quick-release base according to claim 1, characterized in that: Two first magnets are arranged in the middle of the shell, and the two first magnets are distributed along the length direction of the shell.

10. A quick release assembly, characterized in that: It comprises the quick-release base and connecting plate as described in any one of claims 1-9, buckles are symmetrically provided at both ends of the connecting plate, a positioning hole is provided on the outer wall of the connecting plate, a second screw hole is provided in the middle of the outer wall of the connecting plate, the positioning block can be slidably inserted into the positioning hole, and when the positioning block is slidably connected with the positioning hole, the buckle can be snapped into the buckle position one by one.

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