Substrate-fixed high-strength safety inductor

By cooperating with the motor-driven gear system and the pusher/squeeze block, the inductor housing is automatically opened, solving the problem of cumbersome disassembly of existing inductors and realizing automatic and efficient disassembly of inductors.

CN121964327APending Publication Date: 2026-05-01上海驰瑞云智能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
上海驰瑞云智能科技有限公司
Filing Date
2026-01-26
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

The existing inductor disassembly process is cumbersome and requires frequent manual operation by staff, making disassembly inconvenient.

Method used

The system employs a motor-driven gear system, which automatically opens the inductor housing through the meshing of a rack and pinion, and achieves automatic disassembly of the inductor through the cooperation of a push block and a squeeze block.

Benefits of technology

It enables automatic disassembly of inductors, reduces operating steps, improves work efficiency, and simplifies the disassembly process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a substrate-fixed high-strength safety inductor, and belongs to the technical field of inductors, the substrate-fixed high-strength safety inductor comprises a bottom plate and a shell mounted on the bottom plate, a driving assembly is mounted on the bottom plate, an opening assembly is mounted on the driving assembly, a plurality of shell covers are mounted on the opening assembly, and an extrusion assembly is mounted on the opening assembly; two lifting plates are symmetrically installed in the shell, inductor assemblies are installed on the lifting plates, pushing assemblies are installed on the lifting plates, and positioning assemblies are installed on the lifting plates. By arranging the motor, the motor is started to drive the gear to rotate, the first rack and the second rack are both in engaged connection with the gear, when the gear rotates, the first rack and the second rack are driven to move at the same time, the first rack and the second rack move in the opposite directions to drive the two shell covers to move in the opposite directions, and the shell is convenient to open; and a worker can conveniently take out the inductor and does not need to manually open the shell.
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Description

A substrate-fixed high-strength safety inductor Technical Field

[0001] This invention relates to an inductor, and more particularly to a substrate-fixed high-strength safety inductor, belonging to the field of inductor technology. Background Technology

[0002] An inductor is a circuit element that generates an electromotive force (EMF) in response to changes in the current flowing through it, thereby resisting changes in the current. The earliest inductor was the iron-core coil discovered by Faraday in 1831 after he discovered the phenomenon of electromagnetic induction.

[0003] Patent 202321075476.2 discloses a substrate-fixed high-strength safety inductor, including a base and an inductor body. Two sliding openings and positioning blocks are respectively provided on opposite sides of the base and the inductor body. The positioning blocks are slidably inserted into the sliding openings. Two positioning frames are slidably arranged inside the base, and sliders are provided on the positioning frames. A sliding groove is opened on one side of the positioning block, and the sliders are inserted into the sliding grooves. Two disassembly / assembly components are provided inside the base, and the disassembly / assembly components are connected to the positioning frames. Each disassembly / assembly component includes a spring and a pressing rod. The spring is located on one side of the positioning frame, and its other end is fixedly connected to the base. The pressing rod is inserted into the base, and one end is fixedly connected to the positioning frame. In actual use, the above technical solution requires manual opening of the cover plate before disassembling the inductor. This operation is cumbersome and requires frequent operation, making disassembly inconvenient. Summary of the Invention

[0004] The main objective of this invention is to solve the problem of inconvenient disassembly and maintenance of inductors, and to provide a substrate-fixed high-strength safety inductor.

[0005] The objective of this invention can be achieved by adopting the following technical solution: a substrate-fixed high-strength safety inductor, comprising a base plate and a housing mounted on the base plate, a driving assembly mounted on the base plate, an opening assembly mounted on the driving assembly, a plurality of housing covers mounted on the opening assembly, a pressing assembly mounted on the opening assembly, two support plates symmetrically mounted inside the housing, an inductor assembly mounted on the support plates, a pushing assembly mounted on the support plates, and a positioning assembly mounted on the support plates.

[0006] Preferably, a guide rod is installed on the outer shell, a guide ring is slidably installed on the guide rod, and a first connecting rod is installed on the guide ring, one end of the first connecting rod being connected to the shell cover.

[0007] Preferably, the drive assembly includes a motor, a lifting frame, and a side column. The side column is mounted on the base plate, the lifting frame is mounted on one end of the side column, and the motor is mounted on the lifting frame.

[0008] Preferably, the opening assembly includes a first connecting post, a second connecting post, a first rack, a second rack, and a gear. The output end of the motor is equipped with a gear. One of the housing covers is equipped with a first connecting post, and the other housing cover is equipped with a second connecting post. One end of the first connecting post is equipped with a first rack that meshes with the gear, and one end of the second connecting post is equipped with a second rack that meshes with the gear.

[0009] Preferably, the extrusion assembly includes a first auxiliary extrusion block, a first main extrusion block, a bottom rod, a push block, a first spring, a second connecting rod, a second connecting frame, and a side rod. The side rod is mounted on the second rack, the second connecting frame is mounted on the first rack, and push blocks are mounted on both the side rod and the second connecting frame. The second connecting rod is mounted on the lifting plate, and the first auxiliary extrusion block is mounted on one end of the second connecting rod. The bottom rod is mounted on the bottom of the push block, and the first main extrusion block is mounted on one end of the bottom rod. The lifting plate is connected to the bottom plate via the first spring.

[0010] Preferably, a first slide bar is installed on the base plate, and the lifting plate is slidably mounted on the first slide bar.

[0011] Preferably, a movable rod is mounted on the outer casing, and a movable ring that is slidably connected to the movable rod is mounted on the bottom of the push block.

[0012] Preferably, the inductor assembly includes an inductor, a first connecting frame, a support column, and a mounting plate. The mounting plate is mounted on the support plate, and the support plate has a mounting groove adapted to the mounting plate. The support column is mounted on the mounting plate, and the first connecting frame is mounted on one end of the support column. The inductor is mounted on the first connecting frame.

[0013] Preferably, the pushing assembly includes a second main extrusion block, a limiting rod, a second spring, and a limiting ring. The limiting rod is installed on the lifting plate, and the limiting ring is slidably installed on the limiting rod. The limiting ring is connected to the limiting rod through the second spring, and the second main extrusion block is installed on the limiting ring.

[0014] Preferably, the positioning assembly includes a second auxiliary pressing block, a third connecting frame, an insert block, a second sliding rod, a third spring, and a slider. The second sliding rod is mounted on the lifting plate, and a slider is slidably mounted on the second sliding rod. The third connecting frame is mounted on the slider. The second auxiliary pressing block is mounted on one end of the third connecting frame, and the insert block is mounted on the other end of the third connecting frame. The mounting plate has a slot adapted to the insert block, and the slider is connected to the lifting plate through the third spring.

[0015] The beneficial technical effects of the present invention are as follows: 1. The high-strength safety inductor is fixed on the substrate according to the present invention. By setting a motor, the motor drives the gear to rotate. Since the first rack and the second rack are both meshed with the gear, when the gear rotates, it drives the first rack and the second rack to move at the same time. The first rack and the second rack move in opposite directions, which drives the two shell covers to move in opposite directions, making it easy to open the shell and make it easy for the staff to take out the inductor without the need for the staff to manually open the shell.

[0016] 2. By setting up a motor, the motor starts and drives the gear to rotate. When the gear rotates, it drives the first rack and the second rack to move simultaneously. When the first rack and the second rack move, they drive the push block to move. When the push block moves, it drives the first main extrusion block to move. At this time, the first spring returns to its original position and drives the lifting plate and the first auxiliary extrusion block to rise, bringing the inductor closer to the opening of the housing. When the lifting plate rises, it can drive the second main extrusion block to rise. When the second main extrusion block rises, it moves away from the push block. At this time, the second spring returns to its original position and drives the second main extrusion block to move away from the second auxiliary extrusion block. When the second main extrusion block moves away from the second auxiliary extrusion block, the third spring returns to its original position and drives the insertion block to move, sliding the insertion block out of the slot. The operator pulls the inductor and slides the mounting plate out of the mounting slot, which facilitates the removal of the inductor. The operator does not need to remove it manually, making removal more convenient. Moreover, the inductor can be removed while the housing is being opened, which can reduce operation time and improve work efficiency. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the motor structure of the present invention; Figure 3 is a schematic diagram of the inductor structure of the present invention; Figure 4 is a schematic diagram of the base rod structure of the present invention; Figure 5 is a schematic diagram of the first rack structure of the present invention; Figure 6 is a schematic diagram of the second rack structure of the present invention; Figure 7 is a schematic diagram of the second main extrusion block structure of the present invention; Figure 8 is a schematic diagram of the limiting ring structure of the present invention; Figure 9 is a schematic diagram of the second spring structure of the present invention; Figure 10 is a schematic diagram of the second auxiliary extrusion block structure of the present invention; Figure 11 is a schematic diagram of the slider structure of the present invention; Figure 12 is a schematic diagram of the insert block structure of the present invention.

[0018] In the diagram: 1. Base plate; 11. Outer shell; 12. Shell cover; 2. Guide rod; 21. Guide ring; 22. First connecting rod; 3. First connecting column; 31. Second connecting column; 32. First rack; 33. Second rack; 34. Gear; 4. Motor; 41. Lifting frame; 42. Side column; 5. Inductor; 51. First connecting frame; 52. Support column; 53. Mounting plate; 6. Lifting plate; 61. First sliding rod; 7. First auxiliary extrusion. 71. Pressure block; 72. First main extrusion block; 73. Bottom rod; 74. Push block; 75. Moving rod; 76. Moving ring; 77. First spring; 78. Second connecting rod; 79. Second connecting frame; 80. Side rod; 81. Second main extrusion block; 82. Limiting rod; 83. Second spring; 94. Limiting ring; 95. Second auxiliary extrusion block; 96. Third connecting frame; 97. Insert block; 98. Second sliding rod; 99. Third spring; 90. Slider. Detailed Implementation

[0019] To enable those skilled in the art to understand the technical solution of the present invention more clearly, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0020] As shown in Figures 1-12, the substrate-fixed high-strength safety inductor provided in this embodiment includes a base plate 1 and a housing 11 mounted on the base plate 1. A driving assembly is mounted on the base plate 1, an opening assembly is mounted on the driving assembly, multiple housing covers 12 are mounted on the opening assembly, and a pressing assembly is mounted on the opening assembly. Two lifting plates 6 are symmetrically mounted inside the housing 11. Inductor assemblies are mounted on the lifting plates 6, a pushing assembly is mounted on the lifting plates 6, a positioning assembly is mounted on the lifting plates 6, and a guide rod 2 is mounted on the housing 11. A guide ring 21 is slidably mounted on rod 2, and a first connecting rod 22 is mounted on the guide ring 21. One end of the first connecting rod 22 is connected to the cover 12. The drive assembly includes a motor 4, a lifting frame 41, and a side column 42. The side column 42 is mounted on the base plate 1, and the lifting frame 41 is mounted on one end of the side column 42. The motor 4 is mounted on the lifting frame 41. The opening assembly includes a first connecting column 3, a second connecting column 31, a first rack 32, a second rack 33, and a gear 34. The gear 34 is mounted on the output end of the motor 4. One of the cover 12 is equipped with... A first connecting post 3 and a second connecting post 31 are mounted on the other housing 12. A first rack 32, which meshes with a gear 34, is mounted at one end of the first connecting post 3, and a second rack 33, which meshes with the gear 34, is mounted at one end of the second connecting post 31. A motor 4 is installed, which, when started, drives the gear 34 to rotate. Since both the first rack 32 and the second rack 33 are meshed with the gear 34, the rotation of the gear 34 causes the first rack 32 and the second rack 33 to move simultaneously, in opposite directions. The movement causes the two housing covers 12 to move in opposite directions, making it easier to open the housing 11 and remove the inductor without requiring manual opening. The guide rod 2 and guide ring 21 are slidably connected to guide and limit the housing cover 12. The first connecting rod 22 supports the housing cover 12. The first connecting post 3 supports the first rack 32. The second connecting post 31 supports the second rack 33. The side post 42 and the support frame 41 support the motor 4.

[0021] In this embodiment, as shown in Figures 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, the extrusion assembly includes a first auxiliary extrusion block 7, a first main extrusion block 71, a bottom rod 72, a push block 73, a first spring 76, a second connecting rod 77, a second connecting frame 78, and a side rod 79. The side rod 79 is mounted on the second rack 33, and the second connecting frame 78 is mounted on the first rack 32. Push blocks 73 are mounted on both the side rod 79 and the second connecting frame 78. The second connecting rod 77 is mounted on the lifting plate 6. The first auxiliary extrusion block 7 is mounted at one end of the second connecting rod 77. The bottom rod 72 is mounted at the bottom of the push block 73, and the first main extrusion block 71 is mounted at one end of the bottom rod 72. The lifting plate 6 is connected to the base plate 1 via the first spring 76. A first sliding rod 61 is installed on the base plate 1, and a lifting plate 6 is slidably installed on the first sliding rod 61. A moving rod 74 is installed on the outer shell 11. A moving ring 75, which is slidably connected to the moving rod 74, is installed at the bottom of the push block 73. The inductor assembly includes an inductor 5, a first connecting frame 51, a support column 52, and a mounting plate 53. The lifting plate 6 is equipped with a mounting plate 53, and a mounting groove that cooperates with the mounting plate 53 is opened on the lifting plate 6. The support column 52 is installed on the mounting plate 53, and the first connecting frame 51 is installed at one end of the support column 52. The inductor 5 is installed on the first connecting frame 51. The pushing assembly includes a second main pressing block 8, a limiting rod 81, a second spring 82, and a limiting ring 83. The lifting plate 6 is equipped with a limiting rod 81, and a moving ring 75 is slidably connected to the limiting rod 81. A limit ring 83 is installed, which is connected to a limit rod 81 via a second spring 82. A second main extrusion block 8 is installed on the limit ring 83. The positioning assembly includes a second auxiliary extrusion block 9, a third connecting frame 91, an insert block 92, a second slide rod 93, a third spring 94, and a slider 95. A second slide rod 93 is installed on the lifting plate 6, and a slider 95 is slidably mounted on the second slide rod 93. A third connecting frame 91 is installed on the slider 95. The second auxiliary extrusion block 9 is installed at one end of the third connecting frame 91, and the insert block 92 is installed at the other end of the third connecting frame 91. A slot is provided on the mounting plate 53 to cooperate with the insert block 92. The slider 95 is connected to the lifting plate 6 via the third spring 94. A motor 4 is installed, which drives the gear 34 to rotate. When activated, the first rack 32 and the second rack 33 move simultaneously. As they move, the push block 73 moves, and the push block 73 moves, causing the first main pressing block 71 to move. At this time, the first spring 76 resets, causing the lifting plate 6 and the first auxiliary pressing block 7 to rise, bringing the inductor 5 closer to the opening of the housing 11. As the lifting plate 6 rises, it can also cause the second main pressing block 8 to rise. As the second main pressing block 8 rises, it moves away from the push block 73. At this time, the second spring 82 resets, causing the second main pressing block 8 to move away from the second auxiliary pressing block 9. When the second main pressing block 8 moves away from the second auxiliary pressing block 9, the third spring 94 resets, causing the insertion block 92 to move, sliding the insertion block 92 out of the slot. The operator then pulls the inductor 5.The mounting plate 53 is slid out of the mounting slot, facilitating the removal of the inductor 5 without manual disassembly. This allows for convenient removal, and the inductor 5 can be removed while the housing 11 is being opened, reducing operation time and improving efficiency. A sliding connection between the moving rod 74 and the moving ring 75 guides and limits the push block 73. A second connecting bracket 78 supports the first rack 32, a side rod 79 supports the second rack 33, a second connecting rod 77 supports the first auxiliary extrusion block 7, a bottom rod 72 supports the first main extrusion block 71, a first sliding rod 61 guides and limits the lifting plate 6, a limiting ring 83 slides and a limiting rod 81 guides and limits the second main extrusion block 8, a second sliding rod 93 slides and a slider 95 guides and limits the insertion block 92, and the insertion block 92 engages with the slot to limit the installation of the inductor 5.

[0022] In this embodiment, as shown in Figures 1-12, the working process of a substrate-fixed high-strength safety inductor provided in this embodiment is as follows: Step 1: The motor 4 starts and drives the gear 34 to rotate. Since the first rack 32 and the second rack 33 are both meshed with the gear 34, when the gear 34 rotates, it drives the first rack 32 and the second rack 33 to move simultaneously. The first rack 32 and the second rack 33 move in opposite directions, driving the two shell covers 12 to move in opposite directions, opening the outer shell 11; Step 2: When the first rack 32 and the second rack 33 move, they drive the push block 73 to move. When the push block 73 moves, it drives the first main pressing block 71 to move. At this time, the first spring 76 resets and drives the lifting plate 6 and the first auxiliary pressing block 7 to move. The inductor 5 is raised, bringing it closer to the opening of the housing 11. When the lifting plate 6 rises, it can drive the second main pressing block 8 to rise. When the second main pressing block 8 rises, it moves away from the push block 73. At this time, the second spring 82 resets and drives the second main pressing block 8 to move away from the second auxiliary pressing block 9. When the second main pressing block 8 moves away from the second auxiliary pressing block 9, the third spring 94 resets and drives the insertion block 92 to move, sliding the insertion block 92 out of the slot. The operator pulls the inductor 5 to slide the mounting plate 53 out of the mounting slot and remove the inductor 5. When resetting, the push block 73 presses the second main pressing block 8, and the second main pressing block 8 presses the second auxiliary pressing block 9, inserting the insertion block 92 into the inductor 5 to install the inductor 5.

[0023] In summary, in this embodiment, a high-strength safety inductor is fixed to the substrate according to this embodiment. A motor 4 is provided, which drives the gear 34 to rotate. Since both the first rack 32 and the second rack 33 are meshed with the gear 34, the rotation of the gear 34 drives the first rack 32 and the second rack 33 to move simultaneously. The first rack 32 and the second rack 33 move in opposite directions, causing the two covers 12 to move in opposite directions, facilitating the opening of the outer casing 11 and allowing the operator to remove the inductor without manual opening. A guide rod 2 is slidably connected to a guide ring 21, facilitating the guiding and limiting of the cover 12. A first connecting rod 22 facilitates support. The cover 12, with a first connecting post 3, facilitates support for the first rack 32; with a second connecting post 31, it facilitates support for the second rack 33; and with side posts 42 and a support frame 41, it facilitates support for the motor 4. The motor 4, when started, drives the gear 34 to rotate. When the gear 34 rotates, it causes the first rack 32 and the second rack 33 to move simultaneously. This movement of the first rack 32 and the second rack 33 causes the push block 73 to move, which in turn causes the first main extrusion block 71 to move. At this time, the first spring 76 resets, causing the support plate 6 and the first auxiliary extrusion block 7 to rise, bringing the inductor 5 closer to the opening of the cover 11. The rise of the support plate 6 can then drive the second main extrusion block... As the pressure block 8 rises, the second main pressing block 8 moves away from the push block 73. At this time, the second spring 82 resets, causing the second main pressing block 8 to move away from the second auxiliary pressing block 9. When the second main pressing block 8 moves away from the second auxiliary pressing block 9, the third spring 94 resets, thereby causing the insertion block 92 to move and slide out of the slot. The operator pulls the inductor 5, sliding the mounting plate 53 out of the mounting groove, which facilitates the removal of the inductor 5 without manual removal. The removal is convenient and can be performed while opening the outer casing 11, reducing operation time and improving work efficiency. By setting the sliding connection between the moving rod 74 and the moving ring 75, it is easy to move the push block 73. 3. Guide and limit the movement of the device. The second connecting frame 78 is provided to support the first rack 32. The side rod 79 is provided to support the second rack 33. The second connecting rod 77 is provided to support the first auxiliary extrusion block 7. The bottom rod 72 is provided to support the first main extrusion block 71. The first sliding rod 61 is provided to guide and limit the movement of the lifting plate 6. The limiting ring 83 is slidably connected to the limiting rod 81 to guide and limit the movement of the second main extrusion block 8. The second sliding rod 93 is slidably connected to the slider 95 to guide and limit the movement of the insertion block 92. The insertion block 92 is engaged with the slot to limit the movement of the installed inductor 5.

[0024] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A substrate-fixed high-strength safety inductor, characterized in that, Includes a base plate (1) and a housing (11) mounted on the base plate (1). A drive assembly is mounted on the base plate (1), an opening assembly is mounted on the drive assembly, a plurality of housing covers (12) are mounted on the opening assembly, and a pressing assembly is mounted on the opening assembly. Two lifting plates (6) are symmetrically mounted inside the housing (11). An inductor assembly is mounted on the lifting plate (6), a pushing assembly is mounted on the lifting plate (6), and a positioning assembly is mounted on the lifting plate (6).

2. The substrate-fixed high-strength safety inductor according to claim 1, characterized in that, A guide rod (2) is installed on the outer shell (11), a guide ring (21) is slidably installed on the guide rod (2), and a first connecting rod (22) is installed on the guide ring (21). One end of the first connecting rod (22) is connected to the shell cover (12).

3. A substrate-fixed high-strength safety inductor according to claim 2, characterized in that, The drive assembly includes a motor (4), a lifting frame (41) and a side column (42). The side column (42) is mounted on the base plate (1), and the lifting frame (41) is mounted on one end of the side column (42). The motor (4) is mounted on the lifting frame (41).

4. A substrate-fixed high-strength safety inductor according to claim 3, characterized in that, The opening assembly includes a first connecting post (3), a second connecting post (31), a first rack (32), a second rack (33), and a gear (34). The output end of the motor (4) is equipped with a gear (34). One of the housing covers (12) is equipped with a first connecting post (3), and the other housing cover (12) is equipped with a second connecting post (31). One end of the first connecting post (3) is equipped with a first rack (32) that meshes with the gear (34), and one end of the second connecting post (31) is equipped with a second rack (33) that meshes with the gear (34).

5. A substrate-fixed high-strength safety inductor according to claim 4, characterized in that, The extrusion assembly includes a first auxiliary extrusion block (7), a first main extrusion block (71), a bottom rod (72), a push block (73), a first spring (76), a second connecting rod (77), a second connecting frame (78), and a side rod (79). The side rod (79) is mounted on the second rack (33), and the second connecting frame (78) is mounted on the first rack (32). Push blocks (73) are mounted on both the side rod (79) and the second connecting frame (78). The second connecting rod (77) is mounted on the lifting plate (6). The first auxiliary extrusion block (7) is mounted on one end of the second connecting rod (77). The bottom rod (72) is mounted on the bottom of the push block (73). The first main extrusion block (71) is mounted on one end of the bottom rod (72). The lifting plate (6) is connected to the base plate (1) through the first spring (76).

6. A substrate-fixed high-strength safety inductor according to claim 5, characterized in that, A first slide bar (61) is installed on the base plate (1), and the lifting plate (6) is slidably installed on the first slide bar (61).

7. A substrate-fixed high-strength safety inductor according to claim 6, characterized in that, A movable rod (74) is installed on the outer shell (11), and a movable ring (75) that is slidably connected to the movable rod (74) is installed at the bottom of the push block (73).

8. A substrate-fixed high-strength safety inductor according to claim 7, characterized in that, The inductor assembly includes an inductor (5), a first connecting frame (51), a support column (52), and a mounting plate (53). The mounting plate (53) is mounted on the support plate (6). The support plate (6) has a mounting groove that is adapted to the mounting plate (53). The support column (52) is mounted on the mounting plate (53). The first connecting frame (51) is mounted on one end of the support column (52). The inductor (5) is mounted on the first connecting frame (51).

9. A substrate-fixed high-strength safety inductor according to claim 8, characterized in that, The pushing assembly includes a second main extrusion block (8), a limiting rod (81), a second spring (82), and a limiting ring (83). The limiting rod (81) is installed on the lifting plate (6), and the limiting ring (83) is slidably installed on the limiting rod (81). The limiting ring (83) is connected to the limiting rod (81) through the second spring (82), and the second main extrusion block (8) is installed on the limiting ring (83).

10. A substrate-fixed high-strength safety inductor according to claim 9, characterized in that, The positioning assembly includes a second auxiliary pressing block (9), a third connecting frame (91), an insert block (92), a second sliding rod (93), a third spring (94), and a slider (95). The second sliding rod (93) is installed on the lifting plate (6), and the slider (95) is slidably installed on the second sliding rod (93). The third connecting frame (91) is installed on the slider (95). The second auxiliary pressing block (9) is installed at one end of the third connecting frame (91), and the insert block (92) is installed at the other end of the third connecting frame (91). The mounting plate (53) has a slot that matches the insert block (92). The slider (95) is connected to the lifting plate (6) through the third spring (94).