Current transformer with fixing structure

Abstract

The utility model relates to the technical field of current transformers, and discloses a current transformer with a fixing structure, which comprises a transformer main body, sensing holes penetrate through two opposite end surfaces of the transformer main body, fixing assemblies are arranged on two opposite sides of the transformer main body, and each fixing assembly comprises a fixing seat and a sliding rod parallel to the axis of the corresponding sensing hole. The sliding rod is fixed to the side wall of the mutual inductor body through a fixing base, the side, facing the mutual inductor body, of the sliding rod is slidably connected with a sliding plate, a two-way lead screw parallel to the sliding rod is arranged on the fixing base in a penetrating mode, the outer side of the sliding rod is sleeved with symmetrically-arranged sliding blocks, and the sliding blocks are in threaded connection with the two-way lead screw; the bottom of the sliding plate is provided with a pressing part, the sliding plate is provided with a chute, the sliding block is provided with a push rod facing the sliding plate, the push rod is inserted into the chute to push the sliding plate to ascend and descend so that the pressing part can be pressed or loosened relative to the mutual inductor body, and meanwhile the stability of installation and fixation of the mutual inductor body is ensured through the self-locking function of the bidirectional lead screw. The operation steps are obviously simplified, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a current transformer with a fixed structure. Background Art

[0002] In the power system, the current transformer is an important electrical measuring device that works on the principle of current sensing. It is used to convert the high current in the main circuit into a low current that can be safely measured or controlled without affecting the normal operation of the main circuit, so as to facilitate real-time monitoring and protection of the current in the main circuit.

[0003] Existing current transformers are usually installed on the outside of the main wires when in use, and are fixed in the distribution cabinet by screwing a plurality of fixing screws. When multiple current transformers need to be installed to detect currents in multiple main circuits, the screws on each current transformer need to be repeatedly tightened to fix the current transformers. When a fault occurs, disassembly and replacement are also complicated. Therefore, the whole process is cumbersome and the installation and disassembly efficiency is low.

[0004] Therefore, it is necessary to provide a current transformer with a fixed structure to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a current transformer with a fixed structure to solve the problems existing in the background technology.

[0006] The utility model adopts the following technical solutions:

[0007] A current transformer with a fixed structure, comprising: a transformer body, wherein two opposite end surfaces of the transformer body are penetrated by sensing holes;

[0008] The mutual inductor body is provided with a fixing assembly on two opposite sides, the fixing assembly includes a fixing seat and a sliding rod parallel to the axis of the sensing hole, the sliding rod is fixed to the side wall of the mutual inductor body through the fixing seat, the sliding rod is slidably connected to a sliding plate toward one side of the mutual inductor body, the fixing seat is penetrated with a bidirectional screw rod parallel to the sliding rod, the outer side of the sliding rod is sleeved with a symmetrically arranged sliding block, and the sliding block is threadedly connected to the bidirectional screw rod;

[0009] A clamping portion parallel to the bottom wall of the transformer body is provided at the bottom of the sliding plate, and the sliding plate is provided with symmetrically arranged oblique grooves. A push rod inserted into the oblique groove is provided on the side of the sliding block facing the sliding plate to push the sliding plate up and down so that the clamping portion is tightened or loosened relative to the transformer body.

[0010] Furthermore, a clamping piece is fixedly connected to one end of the fixing seat facing the transformer body, and the clamping piece is fixedly connected to the transformer body. A sliding groove is provided on one side of the clamping piece facing the sliding plate, so that the sliding plate can slide up and down in the sliding groove.

[0011] Furthermore, a protective cover is provided on a side of the abutting member away from the transformer body, and an inner wall of the protective cover is detachably connected to the fixing seat.

[0012] Furthermore, one end of the bidirectional screw is connected to a driving gear, and the driving gear is transmission-connected to a driving gear through at least one transition gear, and the driving gear is rotationally connected to the transformer body. A rotating handle is provided at one end of the driving gear away from the transformer body, so that the rotating handle can be rotated to drive the driving gear so that the driving gear drives the bidirectional screw to rotate.

[0013] Furthermore, it also includes a baffle and an isolation cover, wherein the baffle is arranged on the side of the driving gear facing the bidirectional screw rod, and the baffle is detachably connected to the transformer body, the isolation cover covers the driving gear, the transition gear and the driving gear, and the isolation cover is detachably connected to the end of the baffle away from the bidirectional screw rod.

[0014] Furthermore, a mounting seat is provided at the bottom end of the transformer body, the top surface of the mounting seat abuts against the bottom end of the transformer body, and the top surface of the clamping portion abuts against the bottom surface of the mounting seat, so that the transformer body is fixed on the mounting seat.

[0015] Furthermore, the vertical height of the inclined groove is greater than the distance between the top surface of the pressing portion and the bottom surface of the mounting seat.

[0016] Furthermore, the mutual inductor body includes an upper mutual inductance part and a lower mutual inductance part, the upper mutual inductance part and the lower mutual inductance part are detachably connected, a magnetic attraction part is provided at one end of the lower mutual inductance part facing the upper mutual inductance part, and the upper mutual inductance part is provided with a magnetic attraction surface corresponding to the magnetic attraction part.

[0017] Furthermore, a hinge is provided on one side of the upper mutual inductance portion, and the upper mutual inductance portion is rotatably connected to the lower mutual inductance portion around the hinge.

[0018] Furthermore, a snap lock is provided on one side of the mutual inductor body away from the hinge, the snap lock comprises a lock buckle and a lock tongue, the lock buckle is fixedly provided on the upper mutual inductance part, the lock tongue is provided on the lower mutual inductance part, and the lock buckle and the lock tongue are buckled and connected.

[0019] Beneficial effects:

[0020] The utility model provides a current transformer with a fixed structure. The fixed component comprises a fixed seat, a sliding rod, a sliding plate, a bidirectional screw, a sliding block and a structure of an inclined groove push rod. By rotating the bidirectional screw rod, two sliding blocks can be driven to move on the sliding rod at the same time. The sliding block drives the sliding plate to move up and down through the push rod inserted in the inclined groove of the sliding plate, so that the clamping part can realize rapid clamping or loosening of the transformer body. At the same time, the self-locking function of the bidirectional screw rod is used to ensure the stability of the installation and fixation of the transformer body. The scheme significantly simplifies the operation steps and improves the work efficiency of installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a partial structural schematic diagram of a current transformer with a fixed structure according to the utility model;

[0022] Figure 2 This is an exploded schematic diagram of a fixing component of a current transformer with a fixing structure according to the utility model;

[0023] Figure 3 This is a partial structural schematic diagram of a current transformer with a fixed structure according to the utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of a current transformer with a fixed structure according to the utility model;

[0025] Among them: 1. Transformer body; 101. Sensing hole; 102. Upper mutual inductance part; 103. Lower mutual inductance part; 2. Fixing assembly; 21. Fixing seat; 22. Sliding rod; 23. Sliding plate; 24. Bidirectional screw; 25. Sliding block; 26. Pressing part; 27. Bevel groove; 28. Push rod; 3. Clamping part; 4. Protective cover; 5. Driving gear; 6. Transition gear; 7. Active gear; 8. Rotating handle; 9. Baffle; 10. Isolation cover; 11. Mounting seat; 12. Articulated part; 13. Buckle lock.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] Reference Figure 1 to Figure 2The utility model proposes a current transformer with a fixed structure, comprising: a transformer body 1, wherein two opposite end surfaces of the transformer body 1 are penetrated with sensing holes 101; two opposite sides of the transformer body 1 are provided with fixing components 2, wherein the fixing components 2 include a fixing seat 21 and a sliding rod 22 parallel to the axis of the sensing hole 101, wherein the sliding rod 22 is fixed to the side wall of the transformer body 1 through the fixing seat 21, wherein the sliding rod 22 is slidably connected to a sliding plate 23 toward one side of the transformer body 1, and the fixing seat 21 is penetrated with a parallel The bidirectional screw rod 24 of the sliding rod 22 has a symmetrically arranged sliding block 25 on the outer side of the sliding rod 22, and the sliding block 25 is threadedly connected to the bidirectional screw rod 24; the bottom of the sliding plate 23 is provided with a clamping portion 26 parallel to the bottom wall of the transformer body 1, and the sliding plate 23 is provided with a symmetrically arranged inclined groove 27, and the sliding block 25 is provided with a push rod 28 inserted into the inclined groove 27 on one side of the sliding plate 23 to push the sliding plate 23 to rise and fall so that the clamping portion 26 is compressed or loosened relative to the transformer body 1.

[0032] In the above embodiment, the fixing assembly 2 includes a fixing seat 21, a sliding rod 22, a sliding plate 23, a bidirectional screw 24, a sliding block 25, and a structure of a push rod 28 of an inclined groove 27. When the current transformer needs to be installed or removed, the bidirectional screw 24 can be rotated to make the two sliding blocks 25 move relative to or oppositely on the sliding rod 22, and the sliding plate 23 can be moved up and down on the inner side of the sliding rod 22 by the push rod 28. When the sliding plate 23 moves upward, the pressing portion 26 at the bottom of the sliding plate 23 will fit tightly against the side wall of the transformer body 1, thereby realizing rapid fixing of the transformer body 1. On the contrary, when the sliding plate 23 moves downward, the distance between the pressing portion 26 and the transformer body 1 increases, thereby realizing rapid loosening and removal of the transformer body 1.

[0033] Furthermore, since the bidirectional screw rod 24 has a self-locking function, when the sliding plate 23 moves to a predetermined position, even if the external force disappears, the sliding plate 23 can remain in the current position, ensuring the stability of the installation and fixation of the transformer body 1. In summary, this solution significantly simplifies the operation steps and improves the work efficiency of installation and disassembly.

[0034] In one embodiment, a clamping member 3 is fixedly connected to one end of the fixing seat 21 facing the transformer body 1, and the clamping member 3 is fixedly connected to the transformer body 1. A sliding groove is provided on one side of the clamping member 3 facing the sliding plate 23 so that the sliding plate 23 can be lifted and slid in the sliding groove.

[0035] In the above embodiment, the abutment 3 is L-shaped, and on the one hand, it serves as a connector between the fixing seat 21 and the transformer body 1. On the other hand, the setting of the abutment 3 makes the sliding plate 23 have better stability and guidance when lifting and sliding. The sliding groove defines the sliding path of the sliding plate 23, thereby avoiding the shaking or deviation of the sliding plate 23 during the lifting process, further improving the fixing effect of the transformer body 1. At the same time, the fixed connection between the abutment 3 and the transformer body 1 enhances the stability of the overall structure, making the current transformer more stable and reliable during use.

[0036] refer to Figure 4 In one embodiment, a protective cover 4 is provided on the side of the abutting member 3 facing away from the transformer body 1 , and the inner wall of the protective cover 4 is detachably connected to the fixing seat 21 .

[0037] In the above embodiment, the protective cover 4 covers the sliding rod 22, the bidirectional screw rod 24 and the sliding block 25, and is connected to the fixing seat 21 through the inner wall of the protective cover 4, so that the interior of the protective cover 4 has a certain protection function to prevent contamination by external debris, and prevent pollutants from damaging the transmission components and affecting the installation of the fixed structure on the transformer body 1.

[0038] In addition, the protective cover 4 and the fixing seat 21 can be detachably connected by means of buckles, threads or magnetic attraction, which not only facilitates the user's inspection and maintenance of the internal components, but also ensures the firmness of the protective cover 4 during normal use. This design allows the current transformer to maintain high efficiency and stable operation while also having better maintainability and safety.

[0039] refer to Figure 3 In one embodiment, one end of the bidirectional screw rod 24 is connected to a driving gear 5, and the driving gear is transmission-connected to a driving gear 7 through at least one transition gear 6. The driving gear 7 is rotationally connected to the transformer body 1, and a rotating handle 8 is provided at one end of the driving gear 7 away from the transformer body 1, so that the rotating handle 8 can be rotated to drive the driving gear 7 so that the driving gear 5 drives the bidirectional screw rod 24 to rotate.

[0040] In the above embodiment, the function of the transition gear 6 in this scheme is intermediate transmission, and the number can be changed according to the diameter of the gear. By twisting the rotating handle 8, the two-way screw 24 is rotated through the transmission of the active gear 7, the transition gear 6 and the driving gear 5, thereby driving the movement of the slider. Not only is the convenience of operation improved, but also the stability and accuracy of rotation are ensured by gear transmission. At the same time, due to the use of a gear transmission system, users can adjust the rotation speed according to actual needs to adapt to different work scenarios and installation requirements. In addition, the gear transmission system can also effectively prevent overload and impact, protect the transmission components from damage, and improve the service life and reliability of the current transformer.

[0041] refer to Figure 3 and Figure 4 In one embodiment, it also includes a baffle 9 and an isolation cover 10, wherein the baffle 9 is arranged on the side of the driving gear 5 facing the bidirectional screw rod 24, and the baffle 9 is detachably connected to the transformer body 1, and the isolation cover 10 covers the driving gear 7, the transition gear 6 and the driving gear 5, and the isolation cover 10 is detachably connected to the end of the baffle 9 away from the bidirectional screw rod 24.

[0042] In the above embodiment, the design of the baffle 9 effectively prevents dust and debris from entering the gear transmission system, thereby ensuring the smoothness and accuracy of the gear transmission. At the same time, the detachable connection between the baffle 9 and the transformer body 1 allows the user to easily remove the baffle 9 and clean and inspect the gear transmission system when inspection or maintenance is required. The provision of the isolation cover 10 further enhances the protective effect, completely covering the active gear 7, the transition gear 6 and the drive gear 5, and effectively preventing external factors from interfering with and damaging the transmission components. The detachable connection between the isolation cover 10 and the baffle 9 allows the user to easily remove the isolation cover 10 when necessary to inspect and maintain the internal components.

[0043] In one embodiment, a mounting seat 11 is provided at the bottom end of the transformer body 1, the top surface of the mounting seat 11 abuts against the bottom end of the transformer body 1, and the top surface of the clamping portion 26 abuts against the bottom surface of the mounting seat 11, so that the fixing seat 21 of the transformer body 1 is attached to the mounting seat 11.

[0044] In the above embodiment, in actual application, the mounting seat 11 will be first fixed in a distribution box or other usage scenarios, and the clamping portion 26 will be snapped into the installation work to achieve preliminary positioning, and then the clamping portion 26 and the mounting seat 11 will be pressed together by adjusting the rotating handle 8. The mounting seat 11 provides a stable support platform for the transformer body 1, ensuring the stability and safety of the transformer body 1 during the fixing process. At the same time, the abutment between the mounting seat 11 and the bottom end of the transformer body 1, and the abutment between the clamping portion 26 and the bottom surface of the mounting seat 11, together form a stable fixing structure, which effectively prevents the shaking and displacement of the transformer body 1 during operation, and greatly improves the installation efficiency.

[0045] In one embodiment, the vertical height of the inclined groove 27 is greater than the distance between the top surface of the pressing portion 26 and the bottom surface of the mounting seat 11 .

[0046] In the above embodiment, the design of the inclined groove 27 allows the sliding plate 23 and the pressing part 26 at the bottom thereof to have a certain vertical movement space during the sliding process, thereby enhancing the flexibility of the sliding plate 23 during the lifting process, and ensuring that even when there is a certain slight error between the pressing part 26 and the bottom surface of the mounting seat 11, a close fit and fixation can be achieved through the adjustment function of the inclined groove 27. The vertical height of the inclined groove 27 is greater than the distance between the pressing part 26 and the bottom surface of the mounting seat 11, so that whether there are other items between the pressing part 26 and the mounting seat 11 or the two are in direct contact, it can be ensured that the pressing part 26 and the mounting seat 11 can be pressed against each other.

[0047] In one embodiment, the mutual inductor body 1 includes an upper mutual inductance part 102 and a lower mutual inductance part 103, the upper mutual inductance part 102 and the lower mutual inductance part 103 are detachably connected, a magnetic attraction part is provided at one end of the lower mutual inductance part 103 facing the upper mutual inductance part 102, and the upper mutual inductance part 102 is provided with a magnetic attraction surface corresponding to the magnetic attraction part.

[0048] In the above embodiment, the upper mutual inductance part 102 and the lower mutual inductance part 103 are conveniently and quickly detachably connected by means of the magnetic attraction parts and the magnetic attraction surface. Not only does it simplify the installation and disassembly process and improve work efficiency, but it also enhances the connection stability between the mutual inductance parts through the magnetic attraction. In addition, the magnetic connection also has a self-positioning function, so that the upper mutual inductance part 102 and the lower mutual inductance part 103 can be automatically aligned when connected, further improving the accuracy and reliability of the installation. This detachable mutual inductor body 1 design enables easy disassembly and assembly when maintenance or replacement of parts is required, reduces maintenance costs, and improves the maintainability of the equipment.

[0049] In one embodiment, a hinge 12 is disposed on one side of the upper mutual inductance portion 102 , and the upper mutual inductance portion 102 is rotatably connected to the lower mutual inductance portion 103 around the hinge 12 .

[0050] In the above embodiment, the upper mutual inductance part 102 is rotatably connected to the lower mutual inductance part 103 through the hinge 12, so that the current can be measured in a non-invasive manner when the current transformer is installed. Without disconnecting the circuit, the upper mutual inductance part 102 can be opened and closed around the hinge 12 to a suitable position in the measurement circuit and connected to the lower mutual inductance part 103.

[0051] In one embodiment, a snap lock 13 is provided on the side of the mutual inductor body 1 facing away from the hinge 12, and the snap lock 13 includes a lock buckle and a lock tongue. The lock buckle is fixedly arranged on the upper mutual inductance part 102, and the lock tongue is arranged on the lower mutual inductance part 103, and the lock buckle and the lock tongue are buckled and connected.

[0052] In the above embodiment, the provision of the snap lock 13 further enhances the connection stability between the upper mutual inductance part 102 and the lower mutual inductance part 103. The buckle connection mode of the lock and the lock tongue makes it possible to achieve a tight connection between the upper mutual inductance part 102 and the lower mutual inductance part 103 by aligning the lock and the lock tongue and gently buckling them when it is necessary to fix the upper mutual inductance part 102 and the lower mutual inductance part 103. This not only improves the convenience of operation, but also effectively prevents the transformer body 1 from accidentally loosening or falling off during operation through the locking function of the snap lock 13, because it has a certain locking force, thereby ensuring the stability and safety of the current transformer. In addition, the snap lock 13 also has the feature of quick disassembly. When it is necessary to disassemble or repair the transformer body 1, it is only necessary to lift the handle of the lock tongue to easily separate the upper mutual inductance part 102 and the lower mutual inductance part 103, thereby improving the maintainability and flexibility of the equipment.

[0053] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A current transformer with a fixed structure, characterized in that: include: A transformer body, wherein two opposite end surfaces of the transformer body are penetrated with sensing holes; The mutual inductor body is provided with a fixing assembly on two opposite sides, the fixing assembly includes a fixing seat and a sliding rod parallel to the axis of the sensing hole, the sliding rod is fixed to the side wall of the mutual inductor body through the fixing seat, the sliding rod is slidably connected to a sliding plate toward one side of the mutual inductor body, the fixing seat is penetrated with a bidirectional screw rod parallel to the sliding rod, the outer side of the sliding rod is sleeved with a symmetrically arranged sliding block, and the sliding block is threadedly connected to the bidirectional screw rod; A clamping portion parallel to the bottom wall of the transformer body is provided at the bottom of the sliding plate, and the sliding plate is provided with symmetrically arranged oblique grooves. A push rod inserted into the oblique groove is provided on the side of the sliding block facing the sliding plate to push the sliding plate up and down so that the clamping portion is tightened or loosened relative to the transformer body.

2. A current transformer with a fixed structure according to claim 1, characterized in that: A pressing piece is fixedly connected to one end of the fixing seat facing the transformer body, and the pressing piece is fixedly connected to the transformer body. A sliding groove is provided on one side of the pressing piece facing the sliding plate, so that the sliding plate can slide up and down in the sliding groove.

3. A current transformer with a fixed structure according to claim 2, characterized in that: A protective cover is arranged on the side of the abutting member away from the transformer body, and the inner wall of the protective cover is detachably connected to the fixing seat.

4. A current transformer with a fixed structure according to claim 1, characterized in that: One end of the bidirectional screw is connected to a driving gear, and the driving gear is transmission-connected to a driving gear through at least one transition gear. The driving gear is rotationally connected to the transformer body, and a rotating handle is provided at one end of the driving gear away from the transformer body, so that the rotating handle can be rotated to drive the driving gear so that the driving gear drives the bidirectional screw to rotate.

5. A current transformer with a fixed structure according to claim 4, characterized in that: It also includes a baffle and an isolation cover, wherein the baffle is arranged on the side of the driving gear facing the bidirectional screw rod, and the baffle is detachably connected to the transformer body, the isolation cover covers the driving gear, the transition gear and the driving gear, and the isolation cover is detachably connected to the end of the baffle away from the bidirectional screw rod.

6. A current transformer with a fixed structure according to claim 1, characterized in that: A mounting seat is provided at the bottom end of the transformer body, the top surface of the mounting seat abuts against the bottom end of the transformer body, and the top surface of the pressing portion abuts against the bottom surface of the mounting seat, so that the transformer body is fixed on the mounting seat.

7. A current transformer with a fixed structure according to claim 6, characterized in that: The vertical height of the inclined groove is greater than the distance between the top surface of the pressing portion and the bottom surface of the mounting seat.

8. The current transformer with a fixed structure according to claim 1, characterized in that: The mutual inductor body comprises an upper mutual inductance part and a lower mutual inductance part, wherein the upper mutual inductance part and the lower mutual inductance part are detachably connected, a magnetic attraction part is arranged at one end of the lower mutual inductance part facing the upper mutual inductance part, and a magnetic attraction surface is arranged at the upper mutual inductance part corresponding to the magnetic attraction part.

9. A current transformer with a fixed structure according to claim 8, characterized in that: A hinge is provided on one side of the upper mutual inductance part, and the upper mutual inductance part is rotatably connected with the lower mutual inductance part around the hinge.

10. A current transformer with a fixed structure according to claim 9, characterized in that: A snap lock is arranged on one side of the mutual inductor body away from the hinge, and the snap lock comprises a lock buckle and a lock tongue. The lock buckle is fixedly arranged on the upper mutual inductance part, and the lock tongue is arranged on the lower mutual inductance part. The lock buckle and the lock tongue are buckled and connected.

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