Hoop type magnetic ring convenient to install and use method

Abstract

The invention discloses a hooping type magnetic ring convenient to install and a using method, and relates to the technical field of magnetic ring, the hooping type magnetic ring comprises a main body frame, a locking mechanism and a connecting mechanism, the locking mechanism is fixedly installed on the inner wall of the main body frame, the connecting mechanism is fixedly installed on the outer wall of the main body frame, and the main body frame is composed of an upper clamp and a lower clamp. The upper clamp and the lower clamp are connected through the connecting mechanism, and the locking mechanism drives the connecting mechanism to control the main body frame according to the linkage principle. Through the locking mechanism, stable fixing of the magnetic ring and precise control of the connecting mechanism are achieved, the problems that a traditional magnetic ring is not firmly installed and the precision is difficult to guarantee are solved, the electromagnetic interference suppression effect is improved, the service life of the magnetic ring is prolonged, and installation convenience and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic rings, and in particular to a clamping magnetic ring which is easy to install and a use method thereof. Background Art

[0002] With the continuous advancement of science and technology, various electronic devices such as computers, mobile phones, and home appliances are becoming increasingly popular in people's lives and work. These devices will generate electromagnetic interference during operation and are also easily affected by external electromagnetic interference, which will affect their performance and stability. Therefore, reducing the potential harm of electromagnetic radiation to the environment and human body has become the focus of social attention.

[0003] In the production and maintenance of electronic equipment, the wiring space is limited and the cables are densely arranged. The traditional magnetic ring installation method often takes a lot of time and manpower. When the magnetic ring is damaged or the performance is degraded, the replacement of the traditional magnetic ring requires the disassembly of related equipment or lines, which is complicated and easy to cause equipment damage. However, the replacement of the clamping magnetic ring is very simple. You only need to loosen the clamping device, remove the damaged magnetic ring, and replace it with a new one. There is no need to disassemble and assemble the entire equipment or line on a large scale, thus reducing maintenance costs and maintenance time.

[0004] However, the clamping magnetic ring relies on an external clamping device to fix it on the cable. In actual use, these clamping devices may have unstable clamping force due to environmental factors. The material of the clamping device may react chemically with the cable sheath material or surrounding chemicals. The clamping magnetic ring has an opening, and the magnetic field strength and direction will be distorted near the opening.

[0005] Therefore, it is very necessary for the present application to propose a clamping magnetic ring that is easy to install and a method of use to solve the problems in the background.

[0006] 1. Patent document CN116936215B discloses a clamping magnetic ring that is easy to install and a method of use. The above patent makes the installation of the bottom half magnetic ring and the top half magnetic ring more convenient, but the above patent cannot achieve stable fixation of the magnetic ring and precise control of the connection mechanism.

[0007] 2. Patent document CN107949208B discloses a magnetic ring fixing device, an electrical box and an air conditioner. The above patent realizes that the process of installing the magnetic ring by the magnetic ring fixing device is simple and quick, which can improve the installation efficiency of the magnetic ring, but the above patent cannot achieve the optimization and supplement of the magnetic field at the opening of the magnetic ring.

[0008] 3. Patent document CN106158199B discloses a magnetic ring. The above patent realizes a balanced magnetic field line distribution, but the above patent cannot realize flexible adjustment of the installation position and angle of the magnetic ring.

[0009] 4. Patent document CN106057398B discloses a multi-pole magnetic ring. The above patent realizes the rotation of the magnetic pole segments by means of a pivoting fixing member. The magnetic pole performance is strong and the fixation is more reliable. However, the above patent cannot realize the standardized arrangement of the cable path in the magnetic ring.

[0010] In summary, the above patents cannot achieve the optimization and supplementation of the magnetic field at the opening of the magnetic ring, the flexible adjustment of the installation position and angle of the magnetic ring, the stable fixation of the magnetic ring and the precise control of the connection mechanism, resulting in the traditional magnetic ring being installed unsteadily and the accuracy being difficult to guarantee, the magnetic field at the opening of the magnetic ring being unevenly distributed and prone to weak links, the magnetic ring being difficult to adapt in different installation scenarios, and the cable positioning being inaccurate; To this end, the present application proposes an easy-to-install clamping magnetic ring and a method of use that can achieve optimized supplementation of the magnetic field at the opening of the magnetic ring, flexible adjustment of the installation position and angle of the magnetic ring, stable fixation of the magnetic ring and precise control of the connecting mechanism. Summary of the invention

[0011] The object of the present invention is to provide a clamping magnetic ring that is easy to install and a method of use, so as to solve the technical problems proposed in the above-mentioned background technology that it is impossible to optimize the magnetic field at the opening of the magnetic ring, flexibly adjust the installation position and angle of the magnetic ring, stably fix the magnetic ring and accurately control the connecting mechanism, resulting in the traditional magnetic ring being installed loosely and the accuracy being difficult to ensure, the magnetic field at the opening of the magnetic ring being unevenly distributed and prone to weak links, the magnetic ring being difficult to adapt in different installation scenarios, and the cable positioning being inaccurate.

[0012] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a conveniently installed clamping magnetic ring, comprising a main frame, a locking mechanism and a connecting mechanism, wherein the locking mechanism is fixedly installed on the inner wall of the main frame, and the connecting mechanism is fixedly installed on the outer wall of the main frame, wherein the main frame is composed of an upper clamp and a lower clamp, wherein the upper clamp is connected to the lower clamp by the connecting mechanism, and wherein the locking mechanism drives the connecting mechanism to control the main frame by the linkage principle; The locking mechanism includes a pair of interlocking racks, which are respectively fixedly mounted on opposite sides of the upper clamp and the lower clamp; the inner wall of the upper clamp is provided with a circle of elastic pressure plate, the top of which is fixedly mounted with a first magnetic fixing block, the outer wall of which is fixedly mounted with an upper semi-magnetic ring; the inner wall of the lower clamp is also fixedly mounted with a circle of elastic pressure plate, the top of the elastic pressure plate provided on the lower clamp is fixedly mounted with a second magnetic fixing block, the outer wall of which is fixedly mounted with a lower semi-magnetic ring.

[0013] Preferably, an upper housing is fixedly mounted on the outer wall of the upper clamp, a cable passing area is provided inside the upper housing, and a cable clamping mechanism is provided in the cable passing area; The cable clamping mechanism includes a silicone clamping claw and a rotating arm. The rotating arm is fixedly installed at the bottom end of the outer wall of the silicone clamping claw. Four second grooves are opened at the top end of the outer wall of the rotating arm. The second grooves are evenly arranged along the circumference of the surface of the rotating arm. The silicone clamping claw and the center of the rotating arm are on the same vertical line. The silicone clamping claw is embedded and fixed in the second groove. The silicone clamping claw is provided with four claw bodies, and the surface of each claw body is provided with a grid texture. A pressure sensor and an adjustment airbag are provided at the bottom end of the inner wall of the silicone clamping claw. A nylon belt is adhered to the outer wall of the adjustment airbag. The other end of the nylon belt is fixed to the end of the claw body. The input end of the pressure sensor is connected to the contact point between the nylon belt and the end of the claw body. A clamping ring is fixedly installed at the bottom end of the outer wall of the rotating arm, a buffer sheet is fixedly installed at the bottom end of the outer wall of the clamping ring, and an interlocking rack is fixedly installed at the bottom end of the outer wall of the buffer sheet.

[0014] Preferably, the lower shell is fixedly installed at the bottom end of the outer wall of the upper shell, a strain gauge is fixedly installed on the inner wall of the lower shell, a lower clamp is arranged inside the lower shell, a spring tube is penetrated through the top end of the outer wall of the upper shell, a positioning bar is fixedly installed at the bottom end of the inner wall of the spring tube, three positioning bars are arranged, and the positioning bars are arranged in a circular array with an array angle of 120 degrees; A retractable rotatable mounting bracket is provided at the top of the outer wall of the upper shell, and the mounting bracket includes a fixed rod, a telescopic sleeve rod and a rotating joint. The rotating joint is provided with a mounting hole, and the rotating joint is fixedly nested in the top of the outer wall of the telescopic sleeve rod through the mounting hole. The telescopic sleeve rod is sleeved on the outer wall of the fixed rod, and the fixed rod passes through the mounting hole on the edge of the outer wall of the upper shell and is fixedly connected to the top of the lower shell.

[0015] Preferably, the connection structure is configured to be magnetic, and the magnetic connection mechanism is fixedly installed on the bottom end of the outer wall of the upper shell, and a metal sheet is fixedly installed at the corresponding position of the bottom of the upper shell. The magnetic connection mechanism includes a magnetic strip and a demagnetization component, and a demagnetization component is fixedly installed on the front side of the outer wall of the magnetic strip. The demagnetization component includes a driving plate, an electromagnetic coil and a button, and the electromagnetic coil is wound around the outer wall of the driving plate, and a button is fixedly installed on the bottom end of the outer wall of the driving plate, and the lead wire of the electromagnetic coil is welded to the input end of the driving plate.

[0016] Preferably, a magnetic compensation block is provided at the opening between the upper half magnetic ring and the lower half magnetic ring, a first groove is provided at the side opening of the upper half magnetic ring, the depth of the first groove is set to 2 / 3 of the thickness of the magnetic compensation block, the magnetic compensation block is provided with a three-layer structural wall, the first layer, the second layer, and the third layer are assembled from the inside out, the first layer of the structural wall is set to Permalloy, the second layer of the structural wall is set to an insulating film, the third layer of the structural wall is set to ferrite, a layer of magnetic conductive adhesive film is coated between the magnetic ring opening and the magnetic compensation block, and the magnetic compensation block is penetrated by micropores as a whole.

[0017] Preferably, the outer wall surface of the main frame is covered with a wear-resistant rubber layer, and an adjustment component is fixedly installed on the outer wall of the connecting mechanism. The adjustment component includes a group of fine-tuning screws, and the fine-tuning screws are fixedly installed at the connection between the upper clamp and the lower clamp. The inner sides of the upper clamp and the lower clamp are preset with cable guide grooves, and the outer walls of the upper clamp and the lower clamp are fixedly installed with heat sinks, which are made of thermal conductive copper material. The surface of the interlocking rack is covered with an anti-slip coating, and the magnetic fixing block adopts rare earth permanent magnet material.

[0018] Preferably, the outer wall of the magnetic ring is fixedly installed with a fixing structure, the fixing structure includes a fixing seat and an elastic clip, the fixing seat is fixedly installed on the inner wall of the lower outer shell, the elastic clip is fixedly installed on the top of the outer wall of the fixing seat, the lower half magnetic ring is clamped and fixed inside the lower outer shell by the elastic clip, the two ends of the upper outer shell are fixedly installed with the upper half magnetic ring by the same fixing structure, and the fixing seat is welded to the inner side of the upper outer shell.

[0019] Preferably, a shielding sheet is fixedly mounted on the top of the outer wall of the upper shell, the shielding sheet is wrapped around the bottom of the outer wall of the spring tube, a thermistor is fixedly mounted on the surface of the magnetic ring, and the pins of the thermistor are connected to the wiring holes of the driving sheet; A special-shaped ring is fixedly installed on the bottom end of the outer wall of the interlocking rack, and the bottom of the special-shaped ring is set in the form of a hollow bracket. A positioning plate is fixedly installed on the outer ring of the interlocking rack, and a mounting hole is reserved on the outer ring of the positioning plate. A gasket is fixedly installed on the bottom port of the special-shaped ring.

[0020] Preferably, the method of use comprises the following steps: S1. Pass the cable to be installed with the magnetic ring through the cable passing area inside the upper shell. When the cable passes through, the pressure sensor detects the thickness of the cable, and automatically heats the circuit to adjust the inflation volume of the airbag according to the detection result, so that the silicone clamping claw has pressure to clamp the cable, and the grid texture on the surface of the claw body increases the friction to prevent the cable from sliding; S2. The upper half magnetic ring is fixed on the fixing seat inside the upper housing by the elastic force of the elastic clip, and the lower half magnetic ring is also installed on the inner side of the lower housing by the fixing structure; S3. Hold the upper and lower housings close to each other, and the magnetic strips will generate initial adsorption force. As the fixtures continue to approach, the interlocking racks will mesh with each other and the linkage principle will take effect. Adjust the position of the interlocking racks by adjusting the fine-tuning screws. S4. The rotation of the rotary joint and the extension and retraction of the telescopic sleeve fix the magnetic ring on the installation plane at different angles and positions.

[0021] Preferably, the method of use further comprises the following steps: S11. The cable guide groove guides the cables to keep them neatly arranged when passing through the clamping magnetic ring. The elastic clip applies a clamping force to the corresponding half magnetic ring in a natural state. The elastic clip generates elastic deformation when it is acted upon by the fine-tuning screw. S12. The thermistor is fixed on the surface of the magnetic ring and connected to the wiring hole of the drive sheet through the pin. Press the button of the demagnetization component to energize the electromagnetic coil to generate a magnetic field, offset the magnetism of the magnetic strip, and weaken the magnetic fluid of the connection structure. When the reverse magnetic field strength overcomes the suction force of the magnetic strip, the connection between the upper shell and the lower shell loosens, completing the removal of the magnetic ring.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes stable fixation of the magnetic ring and precise control of the connection mechanism through the locking mechanism, solves the problems of unstable installation and difficult precision of the traditional magnetic ring, improves the electromagnetic interference suppression effect, prolongs the service life of the magnetic ring, and improves the convenience and efficiency of installation; 2. The present invention realizes the optimization and supplementation of the magnetic field at the opening of the magnetic ring through the magnetic compensation block, solves the problem of uneven magnetic field distribution and weak links at the opening of the magnetic ring, improves the overall magnetic field stability of the magnetic ring, and enhances the electromagnetic performance of the magnetic ring; 3. The present invention uses a retractable and rotatable mounting bracket to achieve flexible adjustment of the mounting position and angle of the magnetic ring, thereby solving the problem that the magnetic ring is difficult to adapt to different installation scenarios, facilitating installation and improving the versatility and adaptability of the magnetic ring; 4. The present invention realizes the standardized arrangement of the cable path in the magnetic ring through the cable guide groove, solves the problem of inaccurate cable positioning, makes the cable layout neat, reduces electromagnetic interference, ensures the working stability of the magnetic ring, and facilitates the maintenance and management of the cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the silicone gripping claw of the present invention; Figure 3 It is a schematic diagram of the structure of the elastic pressing plate and the magnetic fixing block of the present invention; Figure 4 It is a schematic diagram of the structure of the regulating airbag of the present invention; Figure 5 It is a schematic diagram of the external structure of the magnetic compensation block of the present invention; Figure 6 It is a schematic diagram of the internal structure of the magnetic compensation block of the present invention; Figure 7 It is a schematic diagram of the structure of the spring tube of the present invention; Figure 8 It is a schematic diagram of the structure of the magnetic ring body of the present invention; Fig. 9 It is a schematic diagram of the structure of the demagnetization component of the present invention.

[0024] In the figure: 1, upper fixture; 2, lower fixture; 3, interlocking rack; 4, elastic pressure plate; 5, first magnetic fixing block; 6, upper half magnetic ring; 7, lower half magnetic ring; 8, second magnetic fixing block; 9, upper shell; 10, lower shell; 11, silicone clamping claw; 12, pressure sensor; 13, regulating airbag; 14, rotating arm; 15, magnetic compensation block; 16, first groove; 17, first layer structural wall; 18, second layer structural wall; 19, third layer structural wall; 20, strain gauge ; 21. Second groove; 22. Clamp ring; 23. Buffer plate; 24. Inner magnetic ring; 25. Outer magnetic ring; 26. Positioning strip; 27. Positioning spring; 28. Fixing rod; 29. ​​Telescopic sleeve; 30. Rotating joint; 31. Shielding plate; 32. Spring tube; 33. Magnetic strip; 34. Driving plate; 35. Electromagnetic coil; 36. Button; 37. Thermistor; 38. Special-shaped ring; 39. Positioning plate; 40. Washer; 41. Cable guide groove; 42. Fixing seat; 43. Elastic clip. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-Figure 9 , an embodiment of the present invention: a clamping magnetic ring that is easy to install, the method of use includes the following steps: S1, passing the cable that needs to be installed with the magnetic ring through the cable passing area inside the upper shell 9, when the cable passes through, the pressure sensor 12 detects the thickness of the cable, and automatically heats the circuit according to the detection result to adjust the inflation amount of the airbag 13, so that the silicone clamping claw 11 has pressure clamping cable, and the grid texture on the surface of the claw body increases the friction to prevent the cable from sliding; S2, the upper half magnetic ring 6 is passed through the elastic clip 43 itself The elastic force is fixedly mounted on the fixing seat 42 inside the upper housing 9, and the lower half magnetic ring 7 is also mounted on the inner side of the lower housing 10 through a fixing structure; S3, the upper housing 9 and the lower housing 10 are held close to each other, and the magnetic attraction strip 33 generates a preliminary adsorption force. As the clamp continues to approach, the interlocking racks 3 will mesh with each other and the linkage principle begins to take effect. The position of the interlocking racks 3 is adjusted by adjusting the fine-tuning screws; S4, the rotation of the rotary joint 30 and the extension and retraction of the telescopic sleeve 29 fix the magnetic ring on the installation plane at different angles and positions; The method of use also includes the following steps: S11, the cable guide groove 41 guides the cables to keep them neatly arranged when passing through the clamping magnetic ring, the elastic clip 43 applies a clamping force to the corresponding half magnetic ring in a natural state, and the elastic clip 43 generates elastic deformation when it is acted upon by the fine-tuning screw; S12, the thermistor 37 is fixed to the surface of the magnetic ring and connected to the wiring hole of the drive plate 34 through a pin, the button 36 of the demagnetization component is pressed, the electromagnetic coil 35 is energized to generate a magnetic field, the magnetism of the magnetic attraction strip 33 is offset, and the magnetic fluid of the connection structure is weakened, and when the reverse magnetic field strength overcomes the suction force 33 of the magnetic attraction strip, the connection between the upper shell 9 and the lower shell 10 is loosened, and the magnetic ring is disassembled; Further, one end of the cable is slowly passed through the cable passing area inside the upper housing 9. When the cable contacts the silicone clamping claw 11, the pressure sensor 12 detects the pressure signal of the cable and automatically starts the heating circuit according to the preset program to adjust the inflation amount of the airbag 13. When the pressure sensor 12 detects that the outer diameter of the cable is 5mm, the airbag 13 is inflated to an internal pressure of 0.2MPa, so that the silicone clamping claw 11 can tightly clamp the cable, and the grid texture on the surface of the claw body is in full contact with the surface of the cable, providing sufficient friction to prevent the cable from sliding in the cable passing area; The upper half magnetic ring 6 is fixedly mounted on the fixing seat 42 inside the upper housing 9 by the elastic force of the elastic clip 43 itself, ensuring that the upper half magnetic ring 6 is firmly mounted without looseness. Similarly, the lower half magnetic ring 7 is mounted on the inner side of the lower housing 10 by a fixing structure, so that the lower half magnetic ring 7 corresponds to the upper half magnetic ring 6, and the magnetic compensation block 15 can accurately fill the opening between the upper half magnetic ring 6 and the lower half magnetic ring 7, forming a complete magnetic ring structure; Hold the upper housing 9 and the lower housing 10 and bring them close to each other. At this time, the magnetic strip 33 generates a preliminary adsorption force. As the clamp continues to approach, the interlocking racks 3 will mesh with each other, and the linkage principle begins to take effect. During the meshing process of the interlocking racks 3, the position of the interlocking racks 3 is adjusted to the optimal state by adjusting the fine-tuning screws to ensure the tight closure of the magnetic ring. For example, the adjustment range of the fine-tuning screw is ±2mm, and the meshing clearance of the interlocking racks 3 is adjusted to within 0.5mm. By rotating the rotary joint 30 and extending the telescopic sleeve 29, the rotary joint 30 is rotated 45°, and the telescopic sleeve 29 is extended 5cm.

[0029] See also Figure 1 , Figure 3 and Figure 4 , an embodiment provided by the present invention: a conveniently installed clamping magnetic ring, comprising a main frame, a locking mechanism and a connecting mechanism, the inner wall of the main frame is fixedly installed with a locking mechanism, the outer wall of the main frame is fixedly installed with a connecting mechanism, the main frame is composed of an upper clamp 1 and a lower clamp 2, the upper clamp 1 is connected to the lower clamp 2 by a connecting mechanism, and the locking mechanism drives the connecting mechanism to control the main frame through a linkage principle; the locking mechanism comprises a pair of interlocking racks 3, the interlocking racks 3 are respectively fixedly installed on the opposite sides of the upper clamp 1 and the lower clamp 2, the inner wall of the upper clamp 1 is provided with a circle of elastic pressure plates 4, the top of the elastic pressure plates 4 is fixedly installed with a first magnetic fixing block 5, the outer wall of the first magnetic fixing block 5 is fixedly installed with an upper semi-magnetic ring 6, the inner wall of the lower clamp 2 is also fixedly installed with a circle of elastic pressure plates 4, the top of the elastic pressure plates 4 provided on the lower clamp 2 is fixedly installed with a second magnetic fixing block 8, and the outer wall of the second magnetic fixing block 8 is fixedly installed with a lower semi-magnetic ring 7; The upper housing 9 is fixedly mounted on the outer wall of the upper clamp 1, and a cable passing area is arranged inside the upper housing 9, and a cable clamping mechanism is arranged in the cable passing area; a clamping ring 22 is fixedly mounted on the bottom end of the outer wall of the rotating arm 14, and a positioning spring 27 is surrounded by the inner wall of the clamping ring 22, and a buffer sheet 23 is fixedly mounted on the bottom end of the outer wall of the clamping ring 22, and an interlocking rack 3 is fixedly mounted on the bottom end of the outer wall of the buffer sheet 23; A special-shaped ring 38 is fixedly installed at the bottom end of the outer wall of the interlocking rack 3, and the bottom of the special-shaped ring 38 is set in the form of a hollow bracket. A gasket 40 is fixedly installed at the bottom port of the special-shaped ring 38. A positioning plate 39 is fixedly installed on the outer ring of the interlocking rack 3. The outer ring of the positioning plate 39 is reserved with a mounting hole. An inner magnetic ring 24 is fixedly installed at the bottom end of the outer wall of the positioning plate 39. An outer magnetic ring 25 is sleeved on the outer wall of the inner magnetic ring 24. The lower clamp 2 is fixedly installed at the bottom end of the outer wall of the outer magnetic ring 25. Furthermore, without installing the clamping magnetic ring, one end of the cable is connected to the electromagnetic interference source, and the other end is connected to the spectrum analyzer. The electromagnetic interference source is turned on to generate an electromagnetic interference signal in the frequency range of 10MHz-100MHz. The electromagnetic interference noise level on the cable is measured by the spectrum analyzer and recorded as the initial value of 50dBμV. After completing the installation of the clamping magnetic ring, the cable is connected to the electromagnetic interference source and the spectrum analyzer again, and the electromagnetic interference noise level on the cable is measured under the same electromagnetic interference conditions. After taking the average value after multiple measurements, it was found that after installing the magnetic ring, the electromagnetic interference noise level of the cable in the frequency range of 10MHz-100MHz was reduced to 30dBμV, indicating that the clamping magnetic ring effectively suppresses electromagnetic interference; The interlocking rack 3 is made of stainless steel with a tooth pitch of 2mm. The magnetic strip 33 is made of a strong rubber magnet with a surface magnetic field strength of up to 3000Gs. The electromagnetic coil 35 is wound with enameled copper wire with 100 turns and a wire diameter of 0.5mm. The silicone clamping claw 11 is made of food-grade silicone material. The bottom hollow bracket of the special-shaped ring 38 is made of aluminum alloy. A gaussmeter is used to detect the magnetism of the first magnetic fixing block 5 and the second magnetic fixing block 8. The upper semi-magnetic ring 6 is fixed to the inner wall of the upper fixture 1 through the elastic pressure plate 4 and the first magnetic fixing block 5 to ensure that the semi-magnetic ring is firmly installed without any signs of looseness. Similarly, the lower semi-magnetic ring 7 is installed on the inner wall of the lower fixture 2 so that the opening positions of the upper and lower semi-magnetic rings correspond to each other to facilitate the subsequent installation of the magnetic compensation block. The upper shell 9 and the lower shell 10 are held and brought close to each other. At this time, the magnetic strip 33 generates an adsorption force to initially draw the upper fixture 1 and the lower fixture 2 together. During the approach process, pay attention to adjusting the meshing position of the interlocking rack 3 to ensure that the racks mesh with each other accurately. Drive the connecting mechanism to further tighten the main frame through the linkage principle to make the magnetic ring fit tightly around the cable. Check the meshing condition of the interlocking rack 3 and fine-tune the position of the interlocking rack 3 with the fine-tuning screw to control the meshing clearance between the racks within 0.3mm.

[0030] See also Figure 1 , Figure 2 , Figure 8 and Fig. 9, an embodiment provided by the present invention: a clamping magnetic ring which is easy to install, the cable clamping mechanism comprises a silicone clamping claw 11 and a rotating arm 14, the rotating arm 14 is fixedly installed on the bottom end of the outer wall of the silicone clamping claw 11, and four second grooves 21 are opened on the top of the outer wall of the rotating arm 14, and the second grooves 21 are evenly arrayed along the circumference of the surface of the rotating arm 14, the silicone clamping claw 11 and the center of the rotating arm 14 are on the same vertical line, the silicone clamping claw 11 is embedded and fixed in the second groove 21, the silicone clamping claw 11 is provided with four claw bodies, and the surface of each claw body is provided with a grid texture, the bottom end of the inner wall of the silicone clamping claw 11 is provided with a pressure sensor 12 and an adjusting airbag 13, the outer wall of the adjusting airbag 13 is adhered with a nylon belt, and the other end of the nylon belt is fixed to the end of the claw body, and the input end of the pressure sensor 12 is connected to the contact point between the nylon belt and the end of the claw body; A retractable rotatable mounting bracket is provided at the top of the outer wall of the upper shell 9, and the mounting bracket includes a fixed rod 28, a telescopic sleeve rod 29 and a rotating joint 30. The rotating joint 30 is provided with a mounting hole, and the rotating joint 30 is fixedly nested in the top of the outer wall of the telescopic sleeve rod 29 through the mounting hole. The telescopic sleeve rod 29 is sleeved on the outer wall of the fixed rod 28, and the fixed rod 28 passes through the mounting hole on the edge of the outer wall of the upper shell 9 and is fixedly connected to the top of the lower shell 10; A shielding sheet 31 is fixedly mounted on the top of the outer wall of the upper housing 9, and the shielding sheet 31 is wrapped around the bottom of the outer wall of the spring tube 32. A thermistor 37 is fixedly mounted on the surface of the magnetic ring, and the pins of the thermistor 37 are connected to the wiring holes of the driving sheet 34. Further, slowly insert one end of the test cable between the silicone clamping claws 11. When the cable contacts the claw body, continue to push the cable so that the silicone clamping claws 11 automatically open and adapt to the outer diameter of the cable. During this process, the pressure sensor 12 monitors the tension of the nylon belt in real time. When the cable is inserted into a suitable position, the airbag 13 is adjusted to start inflating according to the feedback signal of the pressure sensor 12. Assuming that the initial inflation pressure is set to 0.05MPa, as the inflation proceeds, the clamping force of the silicone clamping claw 11 on the cable gradually increases. When the pressure sensor 12 detects that the tension of the nylon belt reaches 0.5N, the inflation is stopped. At this time, the silicone clamping claw 11 can firmly clamp the cable without causing excessive squeezing of the cable. The telescopic function of the telescopic sleeve 29 adjusts the height of the magnetic ring. If the cable needs to pass through a narrow space, the telescopic sleeve 29 can be retracted to the shortest to make the magnetic ring as close to the cable as possible to avoid interference with surrounding objects. The cable has a 45° bend in the horizontal direction, and the rotary joint 30 can be rotated 45° so that the magnetic ring can fit closely to the curved part of the cable. After adjusting the position and angle of the magnetic ring, the magnetic ring is fixed through the mounting holes on the rotary joint 30 using M4 bolts; After the installation of the clamping magnetic ring is completed, the electromagnetic interference of the cable after the installation of the magnetic ring is re-measured using a spectrum analyzer, and the electromagnetic interference attenuation and noise level values ​​are recorded at the same frequency point. After multiple measurements and taking the average value, it is found that at a frequency of 200MHz, the electromagnetic interference attenuation is increased to 30dB, and the noise level is reduced to 30dBμV, indicating that the clamping magnetic ring effectively suppresses electromagnetic interference and improves the anti-interference ability of the cable.

[0031] See also Figure 1 , Figure 2 , Figure 7 and Fig. 9 , an embodiment provided by the present invention: a clamping magnetic ring that is easy to install, the connection structure is set to a magnetic attraction type, the magnetic attraction connection mechanism is fixedly installed at the bottom end of the outer wall of the upper shell 9, a metal sheet is fixedly installed at the corresponding position of the bottom of the upper shell 9, the magnetic attraction connection mechanism includes a magnetic attraction strip 33 and a demagnetization component, a demagnetization component is fixedly installed on the front side of the outer wall of the magnetic attraction strip 33, the demagnetization component includes a driving sheet 34, an electromagnetic coil 35 and a button 36, the electromagnetic coil 35 is wound around the outer wall of the driving sheet 34, a button 36 is fixedly installed at the bottom end of the outer wall of the driving sheet 34, and the lead wire of the electromagnetic coil 35 is welded to the input end of the driving sheet 34; A magnetic compensation block 15 is provided at the opening between the upper half magnetic ring 6 and the lower half magnetic ring 7, a first groove 16 is provided at the side opening of the upper half magnetic ring 6, the depth of the first groove 16 is set to 2 / 3 of the thickness of the magnetic compensation block 15, the magnetic compensation block 15 is provided with a three-layer structural wall, the first layer, the second layer, and the third layer are assembled from the inside to the outside, the first layer structural wall 17 is set to Permalloy, the second layer structural wall 18 is set to an insulating film, and the third layer structural wall 19 is set to ferrite, a layer of magnetic conductive glue film is coated between the magnetic ring opening and the magnetic compensation block 15, and the magnetic compensation block 15 is penetrated by micropores as a whole; Furthermore, the thickness of the permalloy of the first structural wall 17 is 0.5 mm, the insulating film of the second structural wall 18 is a polyimide film with a thickness of 0.05 mm, and the thickness of the ferrite of the third structural wall 19 is 1 mm; Pick up the upper shell 9 of the clamping magnetic ring, align the cable with the space inside the magnetic ring, slowly put the upper shell 9 on the cable, so that the cable is located in the center of the magnetic ring, ensure that there is a certain gap between the cable and the inner wall of the magnetic ring, and move the lower shell 10 close to the upper shell 9, so that the metal sheet at the bottom of the upper shell 9 and the magnetic strip 33 at the bottom end of the outer wall of the lower shell 10 attract each other. When the distance between the two is within 5mm, the magnetic force generated by the magnetic strip 33 will automatically attract the upper shell 9 and the lower shell 10 together to form a complete magnetic ring structure; The driving plate 34 is made of soft magnetic material, and the electromagnetic coil 35 is wound around the outer wall of the driving plate 34. It can generate sufficient reverse magnetic field to offset the magnetism of the magnetic attraction strip 33 when power is turned on. The button 36 is a micro switch with a trigger force of 0.5N. Pressing the button 36 can connect the power circuit of the electromagnetic coil 35 to realize the separation operation of the magnetic ring.

[0032] See also Figure 1 , Figure 2 and Figure 5 , an embodiment provided by the present invention: a clamping magnetic ring that is easy to install, the outer wall surface of the main frame is covered with a wear-resistant rubber layer, an adjustment component is fixedly installed on the outer wall of the connecting mechanism, the adjustment component includes a group of fine-tuning screws, the fine-tuning screws are fixedly installed at the connection between the upper clamp 1 and the lower clamp 2, the inner sides of the upper clamp 1 and the lower clamp 2 are preset with a cable guide groove 41, the outer walls of the upper clamp 1 and the lower clamp 2 are fixedly installed with a heat sink, the heat sink is made of thermal conductive copper material, the surface of the interlocking rack 3 is covered with an anti-slip coating, and the magnetic fixing block adopts rare earth permanent magnet material; The outer wall of the magnetic ring is fixedly installed with a fixing structure, which includes a fixing seat 42 and an elastic clip 43. The fixing seat 42 is fixedly installed on the inner wall of the lower shell 10, and the elastic clip 43 is fixedly installed on the top of the outer wall of the fixing seat 42. The lower half magnetic ring 7 is clamped and fixedly installed inside the lower shell 10 by the elastic clip 43. The two ends of the upper shell 9 are fixedly installed with the upper half magnetic ring 6 by the same fixing structure, and the fixing seat 42 is welded to the inner side of the upper shell 9. The lower housing 10 is fixedly mounted on the bottom end of the outer wall of the upper housing 9, a strain gauge 20 is fixedly mounted on the inner wall of the lower housing 10, a lower fixture 2 is arranged inside the lower housing 10, a spring tube 32 is penetrated through the top end of the outer wall of the upper housing 9, a positioning bar 26 is fixedly mounted on the bottom end of the inner wall of the spring tube 32, three positioning bars 26 are arranged, and the positioning bars 26 are arranged in a circular array, and the array angle is 120 degrees; Further, according to the outer diameter of the cable, the distance between the upper clamp 1 and the lower clamp 2 of the clamping magnetic ring is preliminarily adjusted. By rotating the fine-tuning screw of the adjustment component, the clamp opening is made slightly larger than the outer diameter of the cable. Generally, the single-side gap is controlled at 1mm-1.5mm. The cable is slowly inserted into the magnetic ring, and the cable is placed along the preset cable guide groove 41 on the inner side of the upper clamp 1 and the lower clamp 2 to ensure that the cable is in the center of the magnetic ring to avoid friction or collision between the cable and the internal components of the magnetic ring. The cable guide groove 41 has a width of 12mm and a depth of 3mm, and a smooth surface, which can guide the cable to pass through the magnetic ring smoothly and play a certain limiting role. After the cable is in place, further fine-tune the opening and closing degree of the upper clamp 1 and the lower clamp 2, and make the magnetic ring fit tightly on the outer skin of the cable by rotating the fine-tuning screw. At the same time, observe the engagement of the interlocking rack 3 to ensure that it is fully engaged and provide a stable locking force. At this time, check whether the fit between the magnetic ring and the cable is tight. If there is any looseness, fine-tune the screw again until the magnetic ring is firmly fixed on the cable, and use the fixing structure to further fix the upper half magnetic ring 6 and the lower half magnetic ring 7 of the magnetic ring. The lower half magnetic ring 7 is tightly clamped in the lower shell 10 by the elastic clip 43, and check whether the clamping force of the elastic clip is sufficient to ensure that the half magnetic ring will not loosen. The two ends of the upper shell 9 also firmly fix the upper half magnetic ring 6 by the same fixing structure to ensure the overall structural stability of the magnetic ring.

[0033] Working principle: when the cable passes through the cable passing area inside the upper shell 9, the cable first contacts the pressure sensor 12 at the bottom end of the inner wall of the silicone clamping claw 11. The pressure sensor 12 automatically controls the heating circuit to adjust the inflation amount of the regulating airbag 13 according to the detected cable thickness. After the regulating airbag 13 is inflated, the nylon belt adhered to the outer wall pulls the claw body of the silicone clamping claw 11, so that the claw body generates an inward clamping force, thereby tightly clamping the cable. The grid texture on the surface of the claw body increases the friction between the cable and further prevents the cable from sliding. The upper semi-magnetic ring 6 is fixedly mounted on the fixing seat 42 inside the upper shell 9 by the elastic force of the elastic clip 43 itself, and the lower semi-magnetic ring 7 is also mounted on the inner side of the lower shell 10 by a fixing structure. The elastic clip 43 applies a stable clamping force to the corresponding semi-magnetic ring in a natural state. When the magnetic ring is installed on the cable, the upper shell 9 and the lower shell 10 are held close to each other, and the magnetic strip 33 in the magnetic connection mechanism will generate a preliminary adsorption force, so that the upper and lower shells are initially close to each other. As the clamps continue to approach, the interlocking racks 3 will mesh with each other and begin to take effect through the linkage principle. At this time, the fine-tuning screws are adjusted to accurately adjust the position of the interlocking racks 3. A magnetic compensation block 15 is provided at the opening between the upper semi-magnetic ring 6 and the lower semi-magnetic ring 7. The inner walls of the upper clamp 1 and the lower clamp 2 are respectively fixedly mounted with a first magnetic fixing block 5 and a second magnetic fixing block 8 through an elastic pressure plate 4, and the outer walls thereof are respectively fixed with an upper semi-magnetic ring 6 and a lower semi-magnetic ring 7, which together constitute a complete magnetic ring structure. When the magnetic ring needs to be removed, the button 36 of the demagnetization component is pressed to energize the electromagnetic coil 35 to generate a magnetic field, which will offset the magnetism of the magnetic attraction bar 33. As the reverse magnetic field strength gradually overcomes the suction force of the magnetic attraction bar 33, the connection between the upper shell 9 and the lower shell 10 becomes loose, and the magnetic ring can be removed from the cable.

[0034] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A clamping magnetic ring that is easy to install, characterized in that: The invention comprises a main frame, a locking mechanism and a connecting mechanism, wherein the locking mechanism is fixedly installed on the inner wall of the main frame, and the connecting mechanism is fixedly installed on the outer wall of the main frame. The main frame is composed of an upper clamp (1) and a lower clamp (2), and the upper clamp (1) is connected to the lower clamp (2) via the connecting mechanism. The locking mechanism drives the connecting mechanism to control the main frame through the linkage principle. The locking mechanism comprises a pair of interlocking racks (3), wherein the interlocking racks (3) are respectively fixedly mounted on opposite sides of the upper clamp (1) and the lower clamp (2); the inner wall of the upper clamp (1) is provided with a circle of elastic pressure plates (4), the top end of the elastic pressure plates (4) is fixedly mounted with a first magnetic fixing block (5), the outer wall of the first magnetic fixing block (5) is fixedly mounted with an upper semi-magnetic ring (6); the inner wall of the lower clamp (2) is also fixedly mounted with a circle of elastic pressure plates (4), the top end of the elastic pressure plates (4) provided on the lower clamp (2) is fixedly mounted with a second magnetic fixing block (8), the outer wall of the second magnetic fixing block (8) is fixedly mounted with a lower semi-magnetic ring (7).

2. The conveniently installed clamping magnetic ring according to claim 1, characterized in that: An upper shell (9) is fixedly mounted on the outer wall of the upper clamp (1), a cable passing area is provided inside the upper shell (9), and a cable clamping mechanism is provided in the cable passing area; The cable clamping mechanism comprises a silicone clamping claw (11) and a rotating arm (14); the rotating arm (14) is fixedly mounted at the bottom end of the outer wall of the silicone clamping claw (11); four second grooves (21) are formed at the top end of the outer wall of the rotating arm (14); the second grooves (21) are arranged evenly along the circumference of the surface of the rotating arm (14); the centers of the silicone clamping claw (11) and the rotating arm (14) are on the same vertical line; the silicone clamping claw (11) is embedded and fixed in the second groove (21); the silicone clamping claw (11) is provided with four claw bodies, each claw body surface is provided with a grid texture; a pressure sensor (12) and an adjustment airbag (13) are provided at the bottom end of the inner wall of the silicone clamping claw (11); a nylon belt is adhered to the outer wall of the adjustment airbag (13); the other end of the nylon belt is fixed to the end of the claw body; the input end of the pressure sensor (12) is connected to the contact point between the nylon belt and the end of the claw body; A clamping ring (22) is fixedly mounted on the bottom end of the outer wall of the rotating arm (14), a positioning spring (27) is surrounded by the inner wall of the clamping ring (22), a buffer sheet (23) is fixedly mounted on the bottom end of the outer wall of the clamping ring (22), and an interlocking rack (3) is fixedly mounted on the bottom end of the outer wall of the buffer sheet (23).

3. The conveniently installed clamping magnetic ring according to claim 2, characterized in that: The lower housing (10) is fixedly mounted on the bottom end of the outer wall of the upper housing (9), a strain gauge (20) is fixedly mounted on the inner wall of the lower housing (10), a lower clamp (2) is arranged inside the lower housing (10), a spring tube (32) is arranged through the top end of the outer wall of the upper housing (9), a retaining bar (26) is fixedly mounted on the bottom end of the inner wall of the spring tube (32), three retaining bars (26) are arranged, and the retaining bars (26) are arranged in a circular array, with an array angle of 120 degrees; A retractable rotatable mounting bracket is provided at the top end of the outer wall of the upper shell (9), the mounting bracket comprising a fixed rod (28), a telescopic sleeve rod (29) and a rotating joint (30), the rotating joint (30) being provided with a mounting hole, the rotating joint (30) being fixedly nested in the top end of the outer wall of the telescopic sleeve rod (29) through the mounting hole, the telescopic sleeve rod (29) being sleeved on the outer wall of the fixed rod (28), the fixed rod (28) penetrating the mounting hole at the edge of the outer wall of the upper shell (9) and being fixedly connected to the top end of the lower shell (10).

4. The conveniently installed clamping magnetic ring according to claim 1 is characterized in that: The connection structure is configured to be magnetically attracted, the magnetically attracted connection mechanism being fixedly mounted on the bottom end of the outer wall of the upper shell (9), a metal sheet being fixedly mounted at a corresponding position on the bottom of the upper shell (9), the magnetically attracted connection mechanism comprising a magnetic attraction strip (33) and a demagnetization component, the demagnetization component being fixedly mounted on the front face of the outer wall of the magnetic attraction strip (33), the demagnetization component comprising a drive sheet (34), an electromagnetic coil (35) and a button (36), the electromagnetic coil (35) being wound around the outer wall of the drive sheet (34), the button (36) being fixedly mounted on the bottom end of the outer wall of the drive sheet (34), and the lead wire of the electromagnetic coil (35) being welded to the input end of the drive sheet (34).

5. The conveniently installed clamping magnetic ring according to claim 1, characterized in that: A magnetic compensation block (15) is provided at the opening between the upper half magnetic ring (6) and the lower half magnetic ring (7), a first groove (16) is provided at the side opening of the upper half magnetic ring (6), the depth of the first groove (16) is set to 2 / 3 of the thickness of the magnetic compensation block (15), the magnetic compensation block (15) is provided with three layers of structural walls, the first layer, the second layer and the third layer are assembled from the inside to the outside, the first layer of structural wall (17) is provided with Permalloy, the second layer of structural wall (18) is provided with an insulating film, and the third layer of structural wall (19) is provided with ferrite, a layer of magnetic conductive adhesive film is coated between the magnetic ring opening and the magnetic compensation block (15), and micropores are penetrated throughout the magnetic compensation block (15).

6. The conveniently installed clamping magnetic ring according to claim 1, characterized in that: The outer wall surface of the main frame is covered with a wear-resistant rubber layer, and an adjustment component is fixedly installed on the outer wall of the connecting mechanism. The adjustment component includes a group of fine-tuning screws, and the fine-tuning screws are fixedly installed at the connection between the upper clamp (1) and the lower clamp (2). The inner sides of the upper clamp (1) and the lower clamp (2) are preset with cable guide grooves (41). The outer walls of the upper clamp (1) and the lower clamp (2) are fixedly installed with heat sinks, and the heat sinks are made of thermal conductive copper material. The surface of the interlocking rack (3) is covered with an anti-slip coating, and the magnetic fixing block adopts rare earth permanent magnet material.

7. The conveniently installed clamping magnetic ring according to claim 1, characterized in that: The outer wall of the magnetic ring is fixedly mounted with a fixing structure, the fixing structure comprising a fixing seat (42) and an elastic clip (43), the fixing seat (42) is fixedly mounted on the inner wall of the lower shell (10), the elastic clip (43) is fixedly mounted on the top of the outer wall of the fixing seat (42), the lower half magnetic ring (7) is fixedly mounted inside the lower shell (10) by clamping through the elastic clip (43), the upper half magnetic ring (6) is fixedly mounted on both ends of the upper shell (9) by the same fixing structure, and the fixing seat (42) is welded to the inner side of the upper shell (9).

8. The conveniently installed clamping magnetic ring according to claim 2, characterized in that: A shielding sheet (31) is fixedly mounted on the top of the outer wall of the upper housing (9), the shielding sheet (31) is wrapped around the bottom of the outer wall of the spring tube (32), a thermistor (37) is fixedly mounted on the surface of the magnetic ring, and a pin of the thermistor (37) is connected to a wiring hole of the driving sheet (34); A special-shaped ring (38) is fixedly installed at the bottom end of the outer wall of the interlocking rack (3), the bottom of the special-shaped ring (38) is set in the form of a hollow bracket, a gasket (40) is fixedly installed at the bottom port of the special-shaped ring (38), a positioning plate (39) is fixedly installed on the outer ring of the interlocking rack (3), the outer ring of the positioning plate (39) is reserved with a mounting hole, an inner magnetic ring (24) is fixedly installed at the bottom end of the outer wall of the positioning plate (39), an outer magnetic ring (25) is sleeved on the outer wall of the inner magnetic ring (24), and a lower clamp (2) is fixedly installed at the bottom end of the outer wall of the outer magnetic ring (25).

9. A method for using a clamping magnetic ring that is easy to install, applicable to the clamping magnetic ring that is easy to install according to any one of claims 1 to 8, characterized in that: The method of use comprises the following steps: S1. Pass the cable to be installed with the magnetic ring through the cable passing area inside the upper housing (9). When the cable passes through, the pressure sensor (12) detects the thickness of the cable and automatically heats the circuit to adjust the inflation volume of the airbag (13) according to the detection result, so that the silicone clamping claw (11) has pressure to clamp the cable, and the grid texture on the surface of the claw body increases the friction to prevent the cable from sliding; S2, the upper half magnetic ring (6) is fixedly mounted on the fixing seat (42) inside the upper housing (9) by the elastic force of the elastic clip (43), and the lower half magnetic ring (7) is similarly mounted on the inner side of the lower housing (10) by the fixing structure; S3, the upper housing (9) and the lower housing (10) are held close to each other, and the magnetic strip (33) generates a preliminary adsorption force. As the fixture continues to approach, the interlocking racks (3) engage with each other and the linkage principle begins to take effect. The position of the interlocking racks (3) is adjusted by adjusting the fine-tuning screw; S4. The rotation of the rotary joint (30) and the extension and retraction of the telescopic sleeve (29) fix the magnetic ring on the installation plane at different angles and positions.

10. The method for using the conveniently installed clamping magnetic ring according to claim 9, characterized in that: The method of use also includes the following steps: S11, the cable guide groove (41) guides the cables to keep them neatly arranged when passing through the clamping magnetic ring, the elastic clip (43) applies a clamping force to the corresponding half magnetic ring in a natural state, and the elastic clip (43) generates elastic deformation when being acted upon by the fine-tuning screw; S12, the thermistor (37) is fixed on the surface of the magnetic ring and connected to the wiring hole of the drive plate (34) through a pin. The button (36) of the demagnetization component is pressed to energize the electromagnetic coil (35) to generate a magnetic field, offsetting the magnetism of the magnetic attraction strip (33), and weakening the magnetic fluid of the connection structure. When the reverse magnetic field strength overcomes the attraction force (33) of the magnetic attraction strip, the connection between the upper shell (9) and the lower shell (10) is loosened, and the magnetic ring is disassembled.

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