RJ45 connector

Abstract

An RJ45 connector, comprising: a first housing, which is provided with a hinge shaft at one end; a second housing, which is provided with two lugs at one end, wherein the two lugs are disposed on two sides of the second housing, two ends of the hinge shaft are rotationally connected to the two lugs, respectively, and the first housing and the second housing are fitted together to enclose a wiring hole; a wire clamping portion, which is arranged on the inner wall of the first housing and / or the second housing at the end thereof close to the wiring hole, wherein when the first housing and the second housing are fitted together, the distance from the end of the wire clamping portion extending towards the axis of the wiring hole to the inner wall of the wiring hole on a directly opposite side or to the wire clamping portion on the directly opposite side is less than the diameter of a wire. By means of configuring the first housing and the second housing to open and close by means of flipping, and arranging the wire clamping portion on the first housing and / or the second housing, the first housing, the second housing and the wire clamping portion cooperate with one another, and the assembly between the wire and the connector can be quickly completed. The structure is simple, the operation is convenient, and the assembly efficiency is effectively improved.

Description

RJ45 connector

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411118417.8 filed on August 15, 2024, and entitled “RJ45 connector”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of connectors, in particular to a RJ45 connector. BACKGROUND

[0004] In various electronic systems, devices and devices, components and components, systems and systems are usually connected by electrical connectors for electrical connection and signal transmission, thereby forming a complete system. Some electrical systems provide power through typical connectors. For example, an industrial standard type RJ45 communication connector provides power in an Ethernet connection by supplying current along the signal circuit.

[0005] The existing technology of the assembled RJ45 connector needs to use an independent tail clamp to fix the wire after assembling the wire, which is complicated in operation and structure, and reduces the assembly efficiency. To solve this problem, the present application provides a RJ45 connector.

[0006] SUMMARY

[0007] Therefore, in order to solve the problems existing in the prior art, the present application provides a RJ45 connector, which comprises a first shell, one end of the first shell is provided with a hinge shaft, and the other end is provided with a connector;

[0008] A second shell, one end of the second shell is provided with two lugs, the two lugs are arranged on both sides of the second shell, and the two ends of the hinge shaft are respectively connected with the two lugs, the first shell and the second shell are covered to form a wiring hole, the wiring hole is used for connecting the wire, and the wiring hole and the lug are located at the same end and are arranged between the two lugs;

[0009] A wire clamping part is arranged on the inner wall of the first shell and / or the second shell close to one end of the wiring hole, and when the first shell and the second shell are covered, the distance from one end of the wire clamping part extending to the axis of the wiring hole to the opposite side of the wiring hole or the opposite side of the wire clamping part is less than the diameter of the wire.

[0010] Further, the wire clamping part comprises at least one compression rib, and the compression rib is fixedly installed on the first shell and / or the second shell.

[0011] Further, the number of compression ribs is two, and the two compression ribs are arranged on both sides of the hinge shaft.

[0012] Further, the lowermost end of the pressing rib is provided with a round chamfer on the side close to the wire hole, and a right angle or an acute angle on the side away from the wire hole.

[0013] Further, the wire clamping part comprises a pressing shaft, the axis of the pressing shaft is parallel to the axis of the hinge shaft, and the two ends of the pressing shaft are rotatably arranged on the first shell and / or the two side walls of the second shell.

[0014] Further, the inner wall of the first shell and / or the second shell is provided with a protrusion close to one end of the wire hole.

[0015] Further, the inner side wall of the hanging ear is provided with a limiting part, the outer side wall of the first shell is provided with a groove matched with the limiting part, and the limiting part is clamped with the groove after the first shell and the second shell are closed.

[0016] Further, the inner wall of the first shell is provided with a pressing plate, and the inner wall of the second shell is provided with a protrusion, and the pressing plate cooperates with the protrusion to clamp the wire after the first shell and the second shell are closed.

[0017] Further, the end of the pressing plate is provided with an arc-shaped pressing piece.

[0018] Further, the other end of the first shell is provided with a clamping groove, the other end of the second shell is provided with a flange, the side wall of the flange is provided with a buckle, and the clamping groove is clamped with the buckle after the first shell and the second shell are closed.

[0019] Beneficial effects: the first shell and the second shell are arranged in a form of flip opening and closing, the wire clamping part is arranged on the first shell and the second shell, the first shell, the second shell and the wire clamping part cooperate with each other, the assembly between the wire and the connector can be quickly completed, the structure is simple, the operation is convenient, and the assembly efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on the drawings shown.

[0021] Fig. 1 is a schematic diagram of the overall structure of the RJ45 connector of the present application;

[0022] Fig. 2 is a schematic diagram of the size change of the wire hole of the RJ45 connector of the present application;

[0023] Fig. 3 is an exploded view of the RJ45 connector of the present application;

[0024] Fig. 4 is an enlarged view of A in Fig. 2;

[0025] Fig. 5 is a schematic view of the cross-sectional structure of the RJ45 connector of the present application;

[0026] Fig. 6 is a schematic view of the three-dimensional structure of the RJ45 connector of the present application;

[0027] Fig. 7 is an internal cross-sectional view of the RJ45 connector of the present application;

[0028] Fig. 8 is a schematic view of the second housing structure of the RJ45 connector of the present application;

[0029] Fig. 9 is a schematic view of the locking assembly structure of the RJ45 connector of the present application;

[0030] Fig. 10 is a schematic view of the assembly process of the RJ45 connector of the present application;

[0031] In the drawings: 1, first housing; 11, plug; 111, clamping groove; 12, hinged shaft; 13, wire clamping portion; 131, compression rib; 1311, round chamfer; 14, compression shaft; 15, recess; 16, notch; 17, connecting piece; 2, second housing; 21, hanging lug; 211, limiting piece; 22, wire hole; 23, protrusion; 24, protrusion; 25, wire distribution area; 251, wire distribution hole; 252, wire distribution groove; 253, jack; 26, flange; 261, buckle; 3, pressing plate; 31, pressing sheet.

[0032] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0035] In addition, the description related to "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance thereof or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" throughout the text includes three schemes, for example, A and / or B includes A technical scheme, B technical scheme, and A and B simultaneously meet the technical scheme; in addition, the technical schemes of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical schemes appears contradictory or cannot be realized, it should be considered that the combination of such technical schemes does not exist, also not within the protection scope required by the present application.

[0036] As shown in FIGS. 1-5, the present application provides an RJ45 connector, comprising a first shell 1, one end of the first shell 1 is provided with a hinge shaft 12, the other end is provided with a joint 11;

[0037] A second shell 2, one end of the second shell 2 is provided with two ears 21, the two ears 21 are arranged on both sides of the second shell 2, the two ends of the hinge shaft 12 are rotatably connected with the two ears 21 respectively, the first shell 1 and the second shell 2 are closed to form a wiring hole 22, the wiring hole 22 is used for accessing the wire, the wiring hole 22 and the ear 21 are located at the same end and are arranged between the two ears 21;

[0038] A wire clamping part 13, the wire clamping part 13 is arranged on the inner wall of the first shell 1 and / or the second shell 2 close to one end of the wiring hole 22, when the first shell 1 and the second shell 2 are closed, the distance from the end of the wire clamping part 13 extending to the axis of the wiring hole 22 to the opposite side of the wiring hole 22 inner wall or the opposite side of the wire clamping part 13 is less than the diameter of the wire.

[0039] In the present embodiment, the first shell 1 and the second shell 2 are both square grooves, the hinge shaft 12 is arranged along the width direction of the first shell 1, the hinge shaft 12 is detachably inserted into the first shell 1 or integrally formed with the first shell 1, the two ears 21 are both provided with a hole 212, the holes 212 are oppositely arranged, the two ends of the hinge shaft 12 are inserted into the holes 212 of the corresponding ears 21, the first shell 1 and the second shell 2 can rotate around the hinge shaft 12, the first shell 1 and the second shell 2 can be opened and closed, the wiring hole 22 is semicircular or U-shaped;

[0040] As shown in FIG. 2, when the first shell 1 and the second shell 2 are opened, the height H1 of the wiring hole 22 is greater than the diameter D of the wire, when the first shell 1 and the second shell 2 are closed, the height H2 of the wiring hole 22 is less than the diameter D of the wire;

[0041] The clamping wire part 13 can be arranged on the first shell 1 or the second shell 2, or arranged on both the first shell 1 and the second shell 2. When the first shell 1 and the second shell 2 are closed, the clamping wire part 13 makes the caliber of the wire hole 22 smaller than the diameter of the wire;

[0042] Specifically, when the wire needs to be assembled, the first shell 1 and the second shell 2 are in an open state, then one end of the wire is inserted into the wire hole 22, and then the first shell 1 or the second shell 2 is flipped around the hinge shaft 12, at this time the clamping wire part 13 also moves synchronously, at this time the clamping wire part 13 makes the height of the wire hole 22 gradually decrease, when the clamping wire part 13 contacts the wire, the first shell 1 or the second shell 2 is continuously flipped, at this time the clamping wire part 13 exerts pressure on the wire, when the first shell 1 and the second shell 2 are closed, the first shell 1, the second shell 2 and the clamping wire part 13 cooperate with each other to achieve the purpose of clamping the wire, so that the wire does not come off the wire hole 22, thereby completing the assembly;

[0043] By arranging the first shell 1 and the second shell 2 to be flip-opened and closed, and arranging the clamping wire part 13 on the first shell 1 and the second shell 2, the first shell 1, the second shell 2 and the clamping wire part 13 cooperate with each other to quickly complete the assembly of the wire and the connector, the structure is simple, the operation is convenient, and the assembly efficiency is effectively improved.

[0044] In one embodiment, the clamping wire part 13 includes at least one compression rib 131, and the compression rib 131 is fixedly installed on the first shell 1 and / or the second shell 2.

[0045] In this embodiment, the cross-sectional shape of the compression rib 131 can be semicircular, polygonal or other irregular shapes. Optionally, the cross-sectional shape of the compression rib 131 is quadrangular. Optionally, the compression rib 131 is arranged in an arc shape. The compression rib 131 can be arranged on the first shell 1 or the second shell 2, or arranged on both the first shell 1 and the second shell 2. When the first shell 1 and the second shell 2 are closed, the distance from the lower end of the compression rib 131 to the second shell 2 is smaller than the diameter of the wire.

[0046] When the number of the compression rib 131 is one, with the hinge shaft 12 as a reference, when the compression rib 131 is arranged on the side of the hinge shaft 12 close to the wire hole 22, the upward force generated after clamping the wire can make the first shell 1 or the second shell 2 generate a closing force. When the compression rib 131 is arranged on the side of the hinge shaft 12 away from the wire hole 22, the upward force generated after clamping the wire can make the first shell 1 or the second shell 2 generate a separating force. The compression rib 131 arranged directly below the hinge shaft 12 will not make the first shell 1 or the second shell 2 generate additional flipping force after clamping the wire.

[0047] When the number of the compression rib 131 is more than two, the compression rib 131 is arranged separately on both sides of the hinge shaft 12. Alternatively, the number of the compression rib 131 is two, and the two compression ribs 131 are arranged on both sides of the hinge shaft 12. In this way, the first shell 1 or the second shell 2 can generate closing force and separating force at the same time. The closing force can make the first shell 1 and the second shell 2 have better clamping effect after being closed. The separating force can make the first shell 1 and the second shell 2 be easier to open.

[0048] In an embodiment, the length direction of the compression rib 131 is parallel to the hinge shaft 12.

[0049] In the embodiment, the length direction of the compression rib 131 is parallel to the hinge shaft 12, so that the compression rib 131 is arranged perpendicularly to the wire, and the clamping effect can be further improved.

[0050] In an embodiment, the corner of the lowermost end of the compression rib 131 near the one side of the wire hole 22 is provided with a round chamfer 1311, and the corner of the lowermost end of the compression rib 131 away from the other side of the wire hole 22 is a right angle or an acute angle.

[0051] In the embodiment, the corner of the lowermost end of the compression rib 131 near the one side of the wire hole 22 is provided with a round chamfer 1311, so that the backward force on the wire during clamping can be reduced, the process is smoother, the clamping feeling can be improved, and a gasket can be additionally arranged between the compression rib 131 and the wire to improve the clamping feeling and better protect the wire. The corner of the lowermost end of the compression rib 131 away from the other side of the wire hole 22 is a right angle or an acute angle. In this way, greater resistance can be generated after the wire is clamped in place, so as to prevent the wire from loosening.

[0052] In an embodiment, the end of the first shell 1 near the wire hole 22 is provided with an arc-shaped notch 16.

[0053] In the embodiment, the direction of the arc-shaped notch 16 is consistent with the direction of the wire hole 22. The arc-shaped notch 16 is arranged at the end of the first shell 1 near the wire hole 22. During the process of inserting the wire and rotating the first shell 1, the first shell 1 will not contact the wire and will not press the wire and displace the wire.

[0054] In an embodiment, a limiting piece 211 is arranged on the inner side wall of the hanging ear 21, and the outer side wall of the first shell 1 is provided with a groove 15 matched with the limiting piece 211. When the first shell 1 and the second shell 2 are closed, the limiting piece 211 is clamped with the groove 15.

[0055] In the embodiment, the limiting member 211 is a protruding rib or protrusion. By arranging the limiting member 211 on the inner side wall of the hanging ear 21, the outer side wall of the first shell 1 is arranged with a groove 15 matched with the limiting member 211. When the first shell 1 is closed with the second shell 2, the limiting member 211 is clamped into the groove 15, thereby playing a role of auxiliary positioning and limiting, preventing the first shell 1 and the second shell 2 from being accidentally closed when threading the wire;

[0056] Optionally, the number of the grooves 15 on the outer side wall of each side of the first shell 1 is two, and the included angle between the two grooves 15 is greater than or equal to 90°. One groove 15 is arranged along the length direction of the first shell 1. When the limiting member 211 is clamped into the groove 15, the first shell 1 and the second shell 2 are in an open state. The other groove 15 is arranged along the height direction of the first shell 1. When the limiting member 211 is clamped into the groove 15, the first shell 1 and the second shell 2 are in a closed state.

[0057] As shown in FIGS. 6-7, in one embodiment, the wire clamping part 13 includes a pressing shaft 14, the axis of the pressing shaft 14 is parallel to the axis of the hinge shaft 12, and both ends of the pressing shaft 14 are rotatably arranged on the two side walls of the first shell 1 and / or the second shell 2.

[0058] In the embodiment, the pressing shaft 14 is in a cylindrical shape. The pressing shaft 14 can be arranged on the two side walls of the first shell 1 or the second shell 2, or can be arranged on the two side walls of the first shell 1 and the second shell 2 at the same time. When the first shell 1 and the second shell 2 are closed, the distance from the lower end of the pressing shaft 14 to the second shell 2 is less than the diameter of the wire. The cylindrical pressing shaft 14 can roll during the pressing process, which can reduce the backward force on the wire, improve the clamping feeling, and protect the wire.

[0059] In one embodiment, the inner wall of the first shell 1 and / or the second shell 2 near one end of the wire connection hole 22 is arranged with a protrusion 23.

[0060] In the embodiment, a plurality of protrusions 23 can be arranged. The protrusions 23 can be arranged on the first shell 1 or the second shell 2, and are always arranged opposite to the pressing rib 131 and the pressing shaft 14, or can be arranged on the first shell 1 and the second shell 2 at the same time. The shape of the protrusion 23 can be a cone or a pyramid.

[0061] By arranging the protrusion 23, the protrusion 23 can be pressed into the outer skin of the wire by the pressing force of the pressing rib 131 or the pressing shaft 14 during the closing process of the first shell 1 and the second shell 2, thereby preventing the wire from deviating during assembly and affecting the assembly effect. At the same time, after the assembly is completed, the protrusion 23 also has the effect of preventing the wire from being pulled out, further improving the clamping effect, and making the clamping effect more stable.

[0062] In one embodiment, the inner wall of the first shell 1 is provided with a pressing plate 3, and the inner wall of the second shell 2 is provided with a convex strip 24. When the first shell 1 is covered with the second shell 2, the pressing plate 3 cooperates with the convex strip 24 to clamp the wire.

[0063] In the embodiment, the shape of the pressing plate 3 is a horizontal U-shaped. When the first shell 1 is covered with the second shell 2, the lower end of the pressing plate 3 applies a downward pressure to the wire. In cooperation with the convex strip 24, the wire can be clamped, further preventing the wire from being deviated during the covering process of the first shell 1 and the second shell 2, and having a positioning effect.

[0064] In one embodiment, the end of the pressing plate 3 is provided with an arc-shaped pressing piece 31.

[0065] In the embodiment, the arc-shaped pressing piece 31 is installed at the end of the pressing plate 3, which can increase the contact area with the wire, so that the clamping effect is better.

[0066] In one embodiment, the pressing plate 3 is made of a plastic or metal material with elasticity.

[0067] In the embodiment, the pressing plate 3 is made of a plastic or metal material with elasticity, which can adapt to wires of different sizes and always apply pressure to the wire, so that the pressing plate 3 and the convex strip 24 always clamp the wire.

[0068] As shown in FIG. 8, in one embodiment, the second shell 2 is provided with a wire distribution area 25, which includes a plurality of wire distribution holes 251, wire distribution grooves 252 and jack holes 253. The wire distribution holes 251 are arranged above the wire distribution grooves 252. The jack holes 253 are arranged at one end of the wire distribution holes 251 away from the wire holes 22 and communicate with the wire distribution holes 251. The first shell 1 is provided with a same number of connecting pieces 17 as the wire distribution grooves 252 and the jack holes 253. When the first shell 1 is covered with the second shell 2, the connecting pieces 17 are respectively inserted into the corresponding wire distribution grooves 252 and jack holes 253.

[0069] In the embodiment, the connecting pieces 17 are made of a conductive metal material, and the shape of the connecting pieces 17 is U-shaped. The connecting pieces 17 are electrically connected with the plug 11. The number of the wire distribution holes 251, the wire distribution grooves 252 and the jack holes 253 can be set according to the number of sub-wires.

[0070] Specifically, the sub-wires of the wire are passed through the branching holes 251 and placed in the branching grooves 252 according to the wiring requirements, and the sub-wires passing through the branching holes 251 are extended into the jack holes 253, then the first shell 1 is covered with the second shell 2, and when the first shell 1 and the second shell 2 are completely covered, the connecting pieces 17 are inserted into the corresponding branching grooves 252 and jack holes 253 to be connected with the sub-wires of the wire, at this time the wire is in communication with the plug 11, the assembly of the wire and the connector is completed, and the operation is simple, convenient and fast.

[0071] The U-shaped connecting pieces 17 also have a fixing effect on the sub-wires in the branching grooves 252 and the jack holes 253, which can further improve the clamping effect, so that the assembly is more stable.

[0072] As shown in FIG. 9, in one embodiment, the other end of the first shell 1 is provided with a clamping groove 111, and the other end of the second shell 2 is provided with a flange 26, and the side wall of the flange 26 is provided with a buckle 261, and when the first shell 1 is covered with the second shell 2, the clamping groove 111 is clamped with the buckle 261.

[0073] In this embodiment, when the first shell 1 is covered with the second shell 2, the first cover body drives the buckle 261 to move synchronously, and when the first shell 1 and the second shell 2 are completely covered, the flange 26 drives the buckle 261 to be inserted into the clamping groove 111, and the clamping groove 111 clamps the buckle 261, so that the first shell 1 and the second shell 2 are always in a covered state.

[0074] When it is needed to open the first shell 1 and the second shell 2, the buckle 261 is only needed to be released from the clamping groove 111, so that the first shell 1 and the second shell 2 can be opened.

[0075] As shown in FIG. 10, in one embodiment, the assembly steps of the RJ45 connector and the wire are as follows:

[0076] S1, first, the first shell 1 and the second shell 2 are in an open state, and at this time the wiring hole 22 is in a maximum opening size;

[0077] S2, then, one end of the wire is inserted from the wiring hole 22, and the sub-wires of the wire are passed through the branching holes 251 and placed in the branching grooves 252 according to the wiring requirements;

[0078] S3, then, the first shell 1 is covered with the second shell 2, and the wire is clamped by the cooperation of the first shell 1, the second shell 2, the compression rib 131 or the compression shaft 14, and the protrusions 23;

[0079] S4. Finally, after the first housing 1 and the second housing 2 are completely closed, the connector 17 will be inserted into the corresponding branch groove 252 and socket 253 to connect with the sub-wire of the wire. The flange 26 drives the buckle 261 to be inserted into the slot 111, and the slot 111 will lock the buckle 261, so that the first housing 1 and the second housing 2 are always in the closed state, and the assembly is completed.

[0080] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An RJ45 connector, characterized by, The utility model relates to a wire clamp, which comprises: a first shell provided with a hinge shaft at one end; a second shell provided with two hanging ears at one end, the two hanging ears being arranged on both sides of the second shell, the two ends of the hinge shaft being rotatably connected with the two hanging ears respectively, the first shell and the second shell being combined to form a wire hole for wire access, the wire hole being located at the same end as the hanging ears and arranged between the two hanging ears; a wire clamping part arranged on the inner wall of the first shell and / or the second shell at the end close to the wire hole, the wire clamping part extending to the end of the wire hole axis after the first shell and the second shell are combined, and the distance from the end of the wire clamping part to the inner wall of the wire hole on the opposite side or the wire clamping part on the opposite side being less than the diameter of the wire.

2. The RJ45 connector of claim 1, wherein, The wire clamping part comprises at least one compression rib, and the compression rib is fixedly installed on the first shell and / or the second shell.

3. The RJ45 connector of claim 2, wherein, The number of compression ribs is two, and the two compression ribs are arranged on both sides of the hinge shaft respectively.

4. The RJ45 connector of claim 3, wherein, The lowermost end of the compression rib close to the side of the wire hole is provided with a round chamfered corner, and the lowermost end of the compression rib away from the side of the wire hole is provided with a right angle or an acute angle.

5. The RJ45 connector of claim 1, wherein, The wire clamping part comprises a compression shaft, the axis of the compression shaft being parallel to the axis of the hinge shaft, and the two ends of the compression shaft being rotatably arranged on the side walls of the first shell and / or the second shell.

6. The RJ45 connector of claim 2 or 5, wherein, The inner wall of the first shell and / or the second shell close to the end of the wire hole is provided with a protruding spike.

7. The RJ45 connector of claim 1, wherein, The inner side wall of the hanging ear is provided with a limiting piece, and the outer side wall of the first shell is provided with a groove matched with the limiting piece, the limiting piece and the groove being clamped after the first shell and the second shell are combined.

8. The RJ45 connector of claim 1, wherein, The inner wall of the first shell is provided with a pressing plate, and the inner wall of the second shell is provided with a protruding strip, the pressing plate and the protruding strip clamping the wire after the first shell and the second shell are combined.

9. The RJ45 connector of claim 8, wherein, The end of the pressing plate is provided with an arc-shaped pressing piece.

10. The RJ45 connector of claim 1, wherein, The other end of the first shell is provided with a clamping groove, the other end of the second shell is provided with a flange, and the side wall of the flange is provided with a buckle, the clamping groove and the buckle being clamped after the first shell and the second shell are combined.

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