CN221180556U

CN221180556U - Medical ultrasonic puncture frame

Info

Publication number: CN221180556U
Application number: CN202322196488.7U
Authority: CN
Inventors: 王寅
Original assignee: Shanxi Tumour Hospital
Current assignee: Shanxi Tumour Hospital
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2024-06-21
Anticipated expiration: 2033-08-15

Abstract

The utility model discloses a medical ultrasonic puncture frame, in particular to the field of medical appliances, which comprises a first fixing frame, wherein an area groove is formed in the right side of the inside of the first fixing frame, a first groove and a second groove are sequentially formed in the upper surface of the first fixing frame from left to right, the first groove and the second groove are communicated with the area groove, a third groove is formed in the right side of the first fixing frame, the third groove is communicated with the area groove, a second fixing frame is arranged above the first fixing frame, and a third fixing frame is formed on the left Fang Junyi body on the opposite side of the first fixing frame and the second fixing frame; compared with the prior art, when the puncture frame is required to be used, the ultrasonic instrument is firstly placed between the arc clamp I and the arc clamp II, the arc clamp generates downward acting force for a while, the spring I is compressed, the pressure rod I is also stressed downwards, the triangular block is pushed to shift rightwards, the clamping block is pushed to be clamped into the clamping groove I through the spring II, and the puncture frame is enabled to be more firmly closed.

Description

Medical ultrasonic puncture frame

Technical Field

The utility model relates to the field of medical instruments, in particular to a medical ultrasonic puncture frame.

Background

In medical particle implantation radiotherapy, a doctor needs to accurately implant radioactive particles into a predetermined target position through a puncture needle to kill tumors in a short distance, in the treatment process, the doctor needs to utilize an ultrasonic diagnostic device to perform interventional diagnosis and treatment on a certain lesion part in a patient body, the puncture needle is guided to puncture through observing an image displayed by the ultrasonic diagnostic device, and clinical hands such as tissue or cell collection, body fluid discharge, liquid medicine injection and the like are required to be installed on an ultrasonic instrument in the treatment process, so that a frame is required to fix the puncture needle:

The existing ultrasonic puncture frame is inconvenient in angle adjustment, low in accuracy and not firm enough in puncture frame fixation, and therefore, the medical ultrasonic puncture frame is provided;

Accordingly, a medical ultrasound puncture frame is proposed for the above-mentioned problems.

Disclosure of utility model

In order to overcome the above-mentioned drawbacks of the prior art, embodiments of the present utility model provide a medical ultrasound puncture frame to solve the above-mentioned problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the medical ultrasonic puncture frame comprises a first fixing frame, wherein an area groove is formed in the right side of the inside of the first fixing frame, a first groove and a second groove are sequentially formed in the upper surface of the first fixing frame from left to right, the first groove and the second groove are communicated with the area groove, a third groove is formed in the right side of the first fixing frame, the third groove is communicated with the area groove, a third fixing frame is arranged above the first fixing frame, the third fixing frame is formed on the left Fang Junyi body of the opposite side of the first fixing frame and the second fixing frame, the opposite ends of the third fixing frame are connected through hinge rotation, a fourth fixing frame is integrally formed on the right side of the lower surface of the second fixing frame, the lower end of the fourth fixing frame penetrates through the second groove and extends to the inside of the area groove, a clamping groove is formed below the left side of the fourth fixing frame, an arc clamp I and an arc clamp II are respectively arranged on the opposite sides of the second fixing frame and the first fixing frame, the upper surface of the arc clamp II is symmetrically and fixedly connected with a support column, the top end of the support column is fixedly connected with the lower surface of the fixing frame II, the lower surface of the arc clamp I is fixedly connected with a spring I, the bottom end of the spring I is fixedly connected with the upper surface of the fixing frame I, the right side of the lower surface of the arc clamp I is fixedly connected with a pressure rod I, the bottom end of the pressure rod I penetrates through the groove I and extends to the inside of the area groove, the left side of the inside of the area groove is fixedly connected with a sliding rod I, the right end of the sliding rod I is fixedly connected with a limiting block I, the outer side wall of the sliding rod I is slidingly connected with a triangular block, the triangular block is contacted with the opposite side of the pressure rod I, the right side of the triangular block is fixedly connected with a spring II, the inside of the area groove is provided with an L-shaped rod, the right-hand member of L shape pole passes groove three, the top fixedly connected with fixture block of L shape pole, the left side of fixture block with the right-hand member fixed connection of spring two, the right-hand member block of fixture block in draw-in groove one, the upper surface fixedly connected with pjncture needle regulating frame of mount two.

Preferably, the puncture needle adjusting frame comprises a rotary table, a U-shaped frame, a puncture needle sleeve, a first extrusion rod, a second extrusion rod, a first extrusion block, a second extrusion block, a sliding block, a second sliding rod, a third spring, a fixed block, a second pressure rod, a third sliding rod, a positioning block, a second limiting block and a fourth spring, wherein the lower surface of the rotary table is fixedly connected with the upper surface of the second fixing frame, the lower surface of the U-shaped frame is rotatably connected with the upper surface of the rotary table through a rotating shaft, the inner side of the U-shaped frame is rotatably connected with the puncture needle sleeve through the rotating shaft, a penetrating extrusion groove is formed in the upper part of the right side of the inner part of the U-shaped frame, the first extrusion rod is positioned in the extrusion groove, the left end of the first extrusion rod is contacted with the outer side wall of the puncture needle sleeve, the right end of the first extrusion rod is fixedly connected with the first extrusion block, the lower surface of the first extrusion block is fixedly connected with the sliding block, the right lower part of the inside of the extrusion groove is fixedly connected with a fixed block, the left side of the fixed block is fixedly connected with a sliding rod II, the sliding block is in sliding connection with the sliding rod II, a spring III is fixedly connected between the sliding block and the fixed block, the right side of the U-shaped frame is fixedly connected with the sliding rod III, the inside of the sliding rod III is provided with a penetrating type sliding groove, the inside of the sliding groove is fixedly connected with a pressure rod II, the left side of the pressure rod II is fixedly connected with a pressing rod II, the left end of the pressing rod II is positioned in the extrusion groove, the pressing rod II is fixedly connected with the pressing block II, the pressing block II is in contact with the opposite side of the pressing block I, the inside of the pressure rod II is provided with a positioning groove, the inside of the positioning groove is in sliding connection with a positioning block, the right end of the positioning block is fixedly connected with a limiting block II, the spring IV is fixedly connected between the limiting block II and the positioning groove, the clamping groove II is formed in the lower portion of the right side of the U-shaped frame, and the clamping grooves III are formed in the outer side of the U-shaped frame on the upper surface of the rotary disc.

Preferably, the top end of the second pressure rod is fixedly connected with a first rubber sleeve, and the right end of the L-shaped rod is fixedly connected with a second rubber sleeve.

Preferably, a rubber pad is fixedly connected below the inner part of the third clamping groove.

Preferably, a penetrating threaded hole is formed in the outer side wall of the puncture needle sleeve, and a bolt is connected to the internal thread of the threaded hole.

Preferably, the upper surface of the first arc-shaped clamp is fixedly connected with a magnetic sheet, and the lower surface of the second arc-shaped clamp is fixedly connected with an iron sheet.

The utility model has the technical effects and advantages that:

compared with the prior art, when the puncture frame is required to be used, the ultrasonic instrument is firstly placed between the arc clamp I and the arc clamp II, the arc clamp generates downward acting force for a while, the first compression spring is used, the first pressure rod is also stressed downwards, the triangular block is pushed to shift rightwards, the clamping block is pushed to be clamped into the clamping groove I through the second spring, so that the puncture frame is more firmly closed, and the operation is more convenient.

Compared with the prior art, when the angle needs to be adjusted, the angle about the pjncture needle is adjustable through the inboard pivot of U-shaped frame, the carousel realization of being connected through the U-shaped frame lower surface rotation that sets up is controlled the angle regulation, when adjusting to the angle of needs, through pressing the pressure bar second of setting, drive extrusion piece second and extrude briquetting first down, drive extrusion bar first and produce thrust with the upper and lower angle locking of fixed pjncture needle, the bottom of pressure bar second is through sliding rod third this moment, the block is in established draw-in groove third, and the promotion of spring fourth is received to the locating piece, the block is in draw-in groove second, reach the effect of locking pjncture needle left and right angles, the regulation of angle is more nimble convenient.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is an enlarged schematic view of the structure a of fig. 1 according to the present utility model.

FIG. 3 is a schematic cross-sectional view of the lancet adjusting frame of the present utility model.

Fig. 4 is an enlarged schematic view of the structure at B of fig. 3 in the present utility model.

The reference numerals are: 1. a first fixing frame; 2. a second fixing frame; 3. a puncture needle adjusting frame; 4. a fixing frame IV; 5. a regional groove; 6. a first groove; 7. a second groove; 8. groove III; 9. a clamping groove I; 10. arc clamp I; 11. arc-shaped clamps II; 12. a support column; 13. a first spring; 14. a first pressure rod; 15. a first sliding rod; 16. a first limiting block; 17. triangular blocks; 18. a second spring; 19. an L-shaped rod; 20. a clamping block; 21. a third fixing frame; 22. an extrusion groove; 23. a sliding groove; 24. a positioning groove; 25. a clamping groove II; 26. a clamping groove III; 27. a first rubber sleeve; 28, a second rubber sleeve; 29. a rubber pad; 30. a threaded hole; 31. a bolt; 32. a magnetic sheet; 33. iron sheet; 301. a turntable; 302. a U-shaped frame; 303. a puncture needle sheath; 304. a first extrusion rod; 305. a second extrusion rod; 306. extruding a first block; 307. extruding a second block; 308. a slide block; 309. a sliding rod II; 310. a third spring; 311. a fixed block; 312. a second pressure rod; 313. a sliding rod III; 314. a positioning block; 315. a second limiting block; 316. and a spring IV.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

The medical ultrasonic puncture frame shown in the drawings 1 and 2 comprises a first fixing frame 1, wherein an area groove 5 is formed in the right side of the inside of the first fixing frame 1, a first groove 6 and a second groove 7 are sequentially formed in the upper surface of the first fixing frame 1 from left to right, the first groove 6 and the second groove 7 are communicated with the area groove 5, a third groove 8 is formed in the right side of the first fixing frame 1, the third groove 8 is communicated with the area groove 5, a third fixing frame 2 is arranged above the first fixing frame 1, a third fixing frame 21 is formed on the left Fang Junyi body on the opposite side of the first fixing frame 1 and the second fixing frame 2, the opposite ends of the two third fixing frames 21 are connected through a hinge in a rotating mode, a fourth fixing frame 4 is integrally formed on the right side of the lower surface of the second fixing frame 2, the lower end of the fourth fixing frame 4 penetrates through the second groove 7 and extends into the inside of the area groove 5, a clamping groove 9 is formed below the left side of the fourth fixing frame 4, an arc clamp 10 and an arc clamp 11 are respectively arranged on the opposite sides of the second fixing frame 2 and the first fixing frame 1, the upper surface of the arc clamp II 11 is symmetrically and fixedly connected with a support column 12, the top end of the support column 12 is fixedly connected with the lower surface of the fixing frame II 2, the lower surface of the arc clamp I10 is fixedly connected with a spring I13, the bottom end of the spring I13 is fixedly connected with the upper surface of the fixing frame I1, the right side of the lower surface of the arc clamp I10 is fixedly connected with a pressure rod I14, the bottom end of the pressure rod I14 penetrates through the groove I6 and extends to the inside of the area groove 5, the left side of the inside of the area groove 5 is fixedly connected with a sliding rod I15, the right end of the sliding rod I15 is fixedly connected with a limiting block I16, the outer side wall of the sliding rod I15 is slidingly connected with a triangular block 17, the triangular block 17 is contacted with the opposite side of the pressure rod I14, the right side of the triangular block 17 is fixedly connected with a spring II 18, the inside of the area groove 5 is provided with an L-shaped rod 19, the right end of L-shaped rod 19 passes groove three 8, and the top fixedly connected with fixture block 20 of L-shaped rod 19, the left side of fixture block 20 and the right-hand member fixed connection of spring two 18, the right-hand member block of fixture block 20 is in draw-in groove one 9, and the upper surface fixedly connected with pjncture needle regulating frame 3 of mount two 2.

Wherein: when the ultrasonic device is used, firstly, the ultrasonic device is placed between the arc clamp I10 and the arc clamp II 11, the arc clamp I10 generates downward acting force, the first spring 13 is compressed, the first pressure rod 14 is also stressed downward, the triangular block 17 is pushed to shift rightwards, the clamping block 20 is pushed to be clamped into the clamping groove I9 through the second spring 18, the effect of closing is achieved, the puncture needle is subsequently placed into the puncture needle sleeve 303, when the angle is required to be adjusted, the upper and lower angles of the puncture needle can be adjusted through the rotating shaft at the inner side of the U-shaped frame 302, the left and right angle adjustment is realized through the rotating disc 301 which is rotatably connected with the lower surface of the U-shaped frame 302, when the angle is adjusted to the required angle, the second pressure rod 312 is pressed, the first pressing block 307 is driven to be pressed downwards, the first pressing rod 304 is driven to generate thrust to fix the upper and lower angles of the puncture needle, the bottom end of the second pressure rod 312 passes through the third sliding rod 313 and is clamped into the clamping groove III 26, the positioning block 314 is pushed by the fourth spring 316 to be clamped into the clamping groove II 25, and the left and right angles of the puncture needle are locked.

Example two

On the basis of the first embodiment, the scheme in the first embodiment is further introduced in detail in combination with the following specific working modes, and the details are described below:

As shown in fig. 3 and 4, as a preferred embodiment; the puncture needle adjusting frame 3 comprises a rotary table 301, a U-shaped frame 302, a puncture needle sleeve 303, a first extrusion rod 304, a second extrusion rod 305, a first extrusion block 306, a second extrusion block 307, a sliding block 308, a second sliding rod 309, a third spring 310, a fixed block 311, a second pressure rod 312, a third sliding rod 313, a positioning block 314, a second limiting block 315 and a fourth spring 316, the lower surface of the rotary table 301 is fixedly connected with the upper surface of a second fixing frame 2, the lower surface of the U-shaped frame 302 is rotationally connected with the upper surface of the rotary table 301 through a rotating shaft, the inner side of the U-shaped frame 302 is rotationally connected with the puncture needle sleeve 303 through the rotating shaft, a penetrating extrusion groove 22 is formed above the right side of the inner side of the U-shaped frame 302, the first extrusion rod 304 is positioned in the extrusion groove 22, the left end of the first extrusion rod 304 is contacted with the outer side wall of the puncture needle sleeve 303, the right end of the first extrusion rod 304 is fixedly connected with the first extrusion block 306, the lower surface of the first extrusion rod 306 is fixedly connected with the sliding block 308, the right lower part of the inside of the extrusion groove 22 is fixedly connected with a fixed block 311, the left side of the fixed block 311 is fixedly connected with a sliding rod II 309, a sliding block 308 is in sliding connection with the sliding rod II 309, a spring III 310 is fixedly connected between the sliding block 308 and the fixed block 311, the right side of the U-shaped frame 302 is fixedly connected with a sliding rod III 313, a penetrating type sliding groove 23 is arranged in the sliding rod III 313, the inner side of the sliding groove 23 is in sliding connection with a pressure rod II 312, the left side of the pressure rod II 312 is fixedly connected with a extrusion rod II 305, the left end of the extrusion rod II 305 is fixedly connected with a extrusion block II 307 in the extrusion groove 22, the extrusion block II 307 is contacted with the opposite side of the extrusion block I306, a positioning groove 24 is arranged in the pressure rod II 312, the inside of the positioning groove 24 is in sliding connection with a positioning block 314, the right end 315 of the positioning block 314 is fixedly connected with a limiting block II, a spring IV 316 is fixedly connected between the limiting block II 315 and the positioning groove 24, a clamping groove II 25 is formed in the lower portion of the right side of the U-shaped frame 302, a plurality of clamping grooves III 26 are formed in the outer side of the U-shaped frame 302 on the upper surface of the rotary table 301, further, the angle of a puncture needle can be adjusted more conveniently by workers, and the puncture needle can be pricked into an affected part of a patient more accurately.

As shown in fig. 3, as a preferred embodiment; the top end of the second pressure rod 312 is fixedly connected with a first rubber sleeve 27, the right end of the L-shaped rod 19 is fixedly connected with a second rubber sleeve 28, and further, the puncture frame is more convenient to fix and adjust during use.

As shown in fig. 3, as a preferred embodiment; the rubber pad 29 is fixedly connected to the lower portion of the inner portion of the third clamping groove 26, and further, the clamping device can be clamped tightly when the angle needs to be fixed.

As shown in fig. 3, as a preferred embodiment; the outer side wall of the puncture needle sheath 303 is provided with a penetrating threaded hole 30, the internal thread of the threaded hole 30 is connected with a bolt 31, and when the puncture needle is sleeved into the puncture needle sheath 303, the puncture needle can be firmer by screwing the bolt 31.

As shown in fig. 1, as a preferred embodiment; the upper surface fixedly connected with magnetic sheet 32 of arc clamp one 10, the lower surface fixedly connected with iron sheet 33 of arc clamp two 11, further, let the puncture frame install on the ultrasonic instrument, the laminating that arc clamp one 10 and arc clamp two 11 can be more closely on the ultrasonic instrument.

The working process of the utility model is as follows:

When the ultrasonic device is used, firstly, the ultrasonic device is placed between the arc clamp I10 and the arc clamp II 11, the arc clamp I10 generates downward acting force, the first spring 13 is compressed, the first pressure rod 14 is also stressed downward, the triangular block 17 is pushed to shift rightwards, the clamping block 20 is pushed to be clamped into the clamping groove I9 through the second spring 18, the effect of closing is achieved, the puncture needle is subsequently placed into the puncture needle sleeve 303, when the angle is required to be adjusted, the upper and lower angles of the puncture needle can be adjusted through the rotating shaft at the inner side of the U-shaped frame 302, the left and right angle adjustment is realized through the rotating disc 301 which is rotatably connected with the lower surface of the U-shaped frame 302, when the angle is adjusted to the required angle, the second pressure rod 312 is pressed, the first pressing block 307 is driven to be pressed downwards, the first pressing rod 304 is driven to generate thrust to fix the upper and lower angles of the puncture needle, the bottom end of the second pressure rod 312 passes through the third sliding rod 313 and is clamped into the clamping groove III 26, the positioning block 314 is pushed by the fourth spring 316 to be clamped into the clamping groove II 25, and the left and right angles of the puncture needle are locked.

The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;

secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;

Finally: the foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. The utility model provides a medical science supersound puncture frame, includes mount one (1), its characterized in that: the utility model discloses a fixing rack, which is characterized in that an area groove (5) is formed on the right side of the inside of a first fixing rack (1), a first groove (6) and a second groove (7) are sequentially formed on the upper surface of the first fixing rack (1) from left to right, the first groove (6) and the second groove (7) are communicated with the area groove (5), a third groove (8) is formed on the right side of the first fixing rack (1), a second fixing rack (2) is arranged above the first fixing rack (1) and is in butt joint with the opposite side left Fang Junyi body of the second fixing rack (2), a third fixing rack (21) is formed on the opposite end of the third fixing rack (21) through a hinge in a rotating mode, a fourth fixing rack (4) is integrally formed on the right side of the lower surface of the second fixing rack (2), the lower end of the fourth fixing rack (4) penetrates through the second groove (7) and extends to the inside the area groove (5), a clamping groove (9) is formed on the lower side of the left side of the fourth fixing rack (4), an arc-shaped clamp (11) is formed on the opposite side of the first fixing rack (2) and the second fixing rack (11) respectively, the top of the support column (12) is fixedly connected with the lower surface of the second fixing frame (2), the lower surface of the first arc-shaped clamp (10) is fixedly connected with a first spring (13), the bottom of the first spring (13) is fixedly connected with the upper surface of the first fixing frame (1), the right side of the lower surface of the first arc-shaped clamp (10) is fixedly connected with a first pressure rod (14), the bottom of the first pressure rod (14) passes through the first groove (6) and extends to the inside of the first area groove (5), the left side of the inside of the first area groove (5) is fixedly connected with a first sliding rod (15), the right end of the first sliding rod (15) is fixedly connected with a first limit block (16), the outer side wall of the first sliding rod (15) is fixedly connected with a triangular block (17), the triangular block (17) is contacted with the opposite side of the first pressure rod (14), the right side of the triangular block (17) is fixedly connected with a second spring (18), the inside of the first area groove (5) is provided with an L-shaped rod (19), the right side of the first sliding rod (19) is fixedly connected with a second clamping block (20), the right side of the first sliding rod (20) is fixedly connected with the right end of the first sliding rod (20), the upper surface of the second fixing frame (2) is fixedly connected with a puncture needle adjusting frame (3).

2. A medical ultrasound puncture stent according to claim 1, wherein: the puncture needle adjusting frame (3) comprises a rotary table (301), a U-shaped frame (302), a puncture needle sleeve (303), a first extrusion rod (304), a second extrusion rod (305), a first extrusion block (306), a second extrusion block (307), a sliding block (308), a second sliding rod (309), a third spring (310), a fixed block (311), a second pressure rod (312), a third sliding rod (313), a positioning block (314), a second limiting block (315) and a fourth spring (316), the lower surface of the rotary table (301) is fixedly connected with the upper surface of the second fixing frame (2), the lower surface of the U-shaped frame (302) is rotationally connected with the upper surface of the rotary table (301) through a rotating shaft, the inner side of the U-shaped frame (302) is rotationally connected with the puncture needle sleeve (303) through a pressing groove (22) is formed in the upper part of the right side of the inner part of the U-shaped frame (302), the first extrusion rod (304) is positioned in the pressing groove (22), the left end of the first extrusion rod (304) is fixedly connected with the upper surface of the second fixing frame (2), the right extrusion block (306) is fixedly connected with the right extrusion groove (306), the left side of fixed block (311) fixedly connected with slide bar two (309), slider (308) with slide bar two (309) sliding connection, slider (308) with be connected with a spring three (310) jointly between fixed block (311), the right side fixedly connected with slide bar three (313) of U-shaped frame (302), the inside of slide bar three (313) has seted up run-through slide groove (23), the inboard sliding connection of slide groove (23) has pressure bar two (312), the left side fixedly connected with extrusion bar two (305) of pressure bar two (312), the left end of extrusion bar two (305) is located extrusion groove (22) inside fixedly connected with extrusion block two (307), extrusion block two (307) with the opposite side of extrusion block one (306) contacts, the inside of pressure bar two (312) has seted up constant head tank (24), the inside sliding connection of constant head tank (24) has pressure bar two (314), the right side fixedly connected with stopper two (315) of the fixed connection of two side of U-shaped frame (315), the side of the fixed head tank (315) has two (315), a plurality of clamping grooves III (26) are formed in the outer side of the U-shaped frame (302).

3. A medical ultrasound puncture stent according to claim 2, wherein: the top end of the second pressure rod (312) is fixedly connected with a first rubber sleeve (27), and the right end of the L-shaped rod (19) is fixedly connected with a second rubber sleeve (28).

4. A medical ultrasound puncture stent according to claim 2, wherein: and a rubber pad (29) is fixedly connected below the inner part of the clamping groove III (26).

5. A medical ultrasound puncture stent according to claim 2, wherein: the outer side wall of the puncture needle sleeve (303) is provided with a penetrating threaded hole (30), and the inner thread of the threaded hole (30) is connected with a bolt (31).

6. A medical ultrasound puncture stent according to claim 1, wherein: the upper surface of the arc clamp I (10) is fixedly connected with a magnetic sheet (32), and the lower surface of the arc clamp II (11) is fixedly connected with an iron sheet (33).