A spring coil that can be mechanically disengaged in segments

Abstract

The present invention relates to the technical field of medical devices, and particularly relates to a spring coil that can be mechanically detached in segments. The spring coil system includes a tip, an outer guiding tube, a cutting tube, a fixing tube, a connecting spring, and a corrugated tube; after an operator first determines the required length of the connecting spring, the connecting spring is cut using the cutting tube, and then it is continuously transmitted to the tip by the rotation of the spring. After that, the outer guiding tube is rotated to cut the corrugated tube, and the cut corrugated tube is fixed by a rotating dial plate inside the outer guiding tube, thereby realizing the production of connecting springs with different lengths. At the same time, the corrugated tube can assist the connecting spring to bend in the blood vessel without falling off. The system has a simple structure, effectively realizes the production of connecting springs with different lengths to adapt to different blood vessels; it has good practicability and economy, which is beneficial to the popularization and use of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a spring coil that can be mechanically detached in segments. Background Art

[0002] Interventional embolization treatment of aneurysms is a common method for treating aneurysms. Generally, a microcatheter is inserted into the root of a patient's thigh, and an embolizing substance is placed into the aneurysm cavity along the microcatheter through a delivery device to cause thrombosis in the cavity, reduce the blood flow in the aneurysm, and thus achieve the purpose of curing the aneurysm.

[0003] In the existing method of treating aneurysms by packing with spring coils, multiple embolizing spring coils of different specifications usually need to be filled according to the size of the aneurysm. However, the commercially available detachable spring coils generally only load one spring coil, and there is only one detachment point, which is inconvenient for operators in clinical practice, the operation time is long, the medical cost of patients is huge, and the length of the spring coil is mostly fixed and cannot match different populations and physical conditions. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a spring coil that can be mechanically detached in segments, which can freely control the length of the spring coil and simultaneously realize the output of multiple segments of spring coils.

[0005] The technical solution adopted by the present invention is as follows: A spring coil that can be mechanically detached in segments, comprising

[0006] a head end, in the middle of which there is a corrugated pipe;

[0007] an outer guiding tube, in the middle of which there is a fixed tube. One end of the fixed tube leads into the middle of the outer guiding tube. A connecting spring is arranged in the middle of the fixed tube. One end of the connecting spring is fixedly connected to the head end, and the corrugated pipe leads into the middle of the connecting spring. In the inner cavity of one end of the outer guiding tube close to the head end, there are several cutting members for dividing and supporting the corrugated pipe;

[0008] a cutting spring member arranged between the outer guiding tube and the fixed tube for cutting the connecting spring;

[0009] The cutting spring member includes a cutting tube sleeved on the fixed tube and arranged between the fixed tube and the outer guiding tube. One end of the cutting tube is provided with a rotating ring that leads into and rotatably connects to the end of the fixed tube. In the inner cavity of one end of the fixed tube, there is also a cutting plate. A spring through hole is arranged in the middle of the cutting plate, and the corrugated pipe leads into the spring through hole. A cutting knife is arranged on one side of the cutting plate. The cutting knife is attached to and slidably connected to the cutting plate. A beveled notch is arranged on one side of the rotating ring close to the cutting plate, and the cutting knife leads into the middle of the beveled notch.

[0010] In one embodiment, fiber hairs are wrapped around the periphery of the bellows to promote thrombus formation.

[0011] In one embodiment, the connecting spring material is platinum-tungsten alloy; or a combination of one or more of platinum, tungsten, gold, silver, tantalum, nickel-titanium alloy, cobalt-chromium alloy, platinum-iridium alloy; or a polymer material.

[0012] In one embodiment, the rotating ring presents an L-shaped rotating body structure with the short side facing outward, the outer side of the short side of the rotating ring is fixedly connected to the inner cavity of the cutting tube, and one end of the outer guide tube is passed through and rotatably connected between the cutting tube and the rotating ring.

[0013] In one embodiment, a guide groove is provided on the cutting plate, and the guiding direction of the guide groove is in the same direction as the movement direction of the cutter. A guide protrusion is provided on the cutter, and the guide protrusion passes into and is slidably connected to the guide groove. A support plate is also provided on the cutting plate, and a reset spring is provided between the support plate and the cutter.

[0014] In one embodiment, the tube cutting member is arranged in the inner cavity of the connecting spring, and the tube cutting member includes a tail fixing tube and an end fixing tube, the tail fixing tube is arranged at one end close to the end head, and the tail fixing tube and the end fixing tube are respectively provided with a first fixing block and a second fixing block in the middle, the bellows passes through and is slidably connected to the second fixing block, a plurality of spring support frames are arranged on the outer sides of the tail fixing tube and the end fixing tube, and the spring support frames abut against the inner cavity of the bellows, and a support lever passing into the inner cavity of the tail fixing tube is arranged on the second fixing block, and a cutting knife is arranged in the inner cavity of the tail fixing tube, and the cutting knife is arranged on a side of the first fixing block close to the end fixing tube, and a fixing block is also arranged on the inner cavity side of the tail fixing tube, and a shearing knife is arranged on the fixing block, and one end of the shearing knife is hinged to the fixing block, and the bellows separates the cutting knife and the shearing knife on both sides of the bellows through the first fixing block, and the support lever abuts against the side of the shearing knife away from the cutting knife.

[0015] In one embodiment, two groups of symmetrically arranged limiting grooves are provided on the outer sides of the tail fixing tube and the end fixing tube, and two groups of symmetrically arranged long limiting rods are provided on the side of the rotating ring close to the end head. A plurality of limiting plates are provided on the long limiting rods, and the limiting plates pass through the gap of the connecting spring and are slidably connected to the adjacent limiting grooves.

[0016] In one embodiment, two groups of symmetrically arranged rotating plates are further provided on the inner cavity side of the middle part of the outer guide tube, and the rotating plates are arranged at the end of the long limiting rod away from the rotating ring. After passing through the gap of the connecting spring, the rotating plates enter the limiting groove in the adjacent tail fixing tube.

[0017] In one embodiment, the bellows is made of metal material.

[0018] The beneficial effects of the present invention are as follows: the present invention is a spring coil that can freely control the length of the spring coil and can realize the output of multiple spring coils and can be mechanically released in sections. The specific implementation method is as follows:

[0019] The operator first screws the connecting spring into the fixed tube virtually, and then one end of the connecting spring passes through the spring through hole and the spring support frame in turn and abuts the end head. After the limit dial plate and the rotating dial plate are set in the gap of the connecting spring, the operation begins. First, the outer guide tube is rotated so that the rotating dial plate abuts one end of the adjacent tail fixed tube. After that, after determining the required length of the corrugated tube, the fixed tube is fixed and the cutting tube is rotated. The cutting tube drives the rotating ring to rotate, and at the same time drives the bevel notch to squeeze the cutter to move along the guiding direction of the guide protrusion and the guide groove. At the same time, the cutter cuts the connecting spring in the spring through hole to cut off the connecting spring. Then, the cutting tube is rotated in the opposite direction so that the cutter is restored to its position by the reset spring, thereby completing the control of the required length of the connecting spring. Second, the connecting spring is continued to be rotated. Since the gap in the fixed tube is small, the segmented connecting spring is also pushed by the end to continue to rotate forward, driving the end head away from the outer guide tube. The connecting spring can be sent into the blood vessel in this way. Third, after being sent in, in order to prevent the connecting spring from being disengaged and lengthened, it is necessary to cut part of the bellows to connect the two ends of the connecting spring for fixing. First, rotate the outer guide tube and continue to rotate the connecting spring. Under the rotation action of the connecting spring, the tail fixing tube and the end fixing tube gradually pass through the port of the outer guide tube until the rotating dial on the outer guide tube falls into the limiting groove in the adjacent tail fixing tube. Then stop rotating the connecting spring and fix the cutting tube, rotate the outer guide tube, and under the fixation of the limiting dial, the outer guide tube drives the tail fixing tube to rotate. Since the support lever passes through the side of the shear knife away from the cutting knife, when the tail fixing tube rotates, it is affected by the support lever on the fixed end fixing tube, and the shear knife is driven to squeeze the bellows close to the cutting knife, so that the bellows is flattened and deformed, and cannot pass through the first fixing block and the second fixing block. At the same time, the shear knife and the cutting knife form a shearing structure to cut off the bellows, so as to realize the separation of the segmented connecting spring and the release of connecting springs of different lengths.

[0020] After that, continue to rotate the connecting spring. After the connecting spring drives the end fixing tube out of the outer guiding tube through the action of friction, steps one to three can be repeated, and the end fixing tube separated from the tail fixing tube can be used as a new "end".

[0021] The device has a simple structure. Through the segmented cutting connecting spring and the corrugated pipe, the connecting springs of different lengths and the continuous output of multiple groups of connecting springs are realized, effectively meeting the implementation needs of different people, having good practicability and economy, and being beneficial to the popularization and use of the device. Brief Description of the Drawings

[0022] The present invention will be further described in detail below with reference to the drawings and specific implementation methods.

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 is a sectional three-dimensional structural schematic diagram of the present invention;

[0025] Figure 3 is a partial sectional structural schematic diagram of the present invention;

[0026] Figure 4 is a partial three-dimensional structural schematic diagram of the cutting tube of the present invention;

[0027] Figure 5 is a second partial three-dimensional structural schematic diagram of the cutting tube of the present invention;

[0028] Figure 6 is a third partial three-dimensional structural schematic diagram of the cutting tube of the present invention;

[0029] Figure 7 is a sectional three-dimensional structural schematic diagram of the outer guiding tube part of the present invention;

[0030] Figure 8 is a partial three-dimensional structural schematic diagram of the outer guiding tube of the present invention;

[0031] Figure 9 is a second partial three-dimensional structural schematic diagram of the outer guiding tube of the present invention;

[0032] Figure 10 is a second sectional three-dimensional structural schematic diagram of the outer guiding tube part of the present invention.

[0033] Description of the Drawings: 1. End head; 2. Outer guide tube; 21. Rotary dial; 22. Tail fixed tube; 221. First fixing block; 222. Cutting knife; 223. Shearing knife; 224. Fixing block; 23. End fixing tube; 231. Second fixing block; 232. Supporting dial rod; 24. Spring support frame; 25. Limit groove; 3. Cutting tube; 31. Rotary ring; 32. Hypotenuse notch; 33. Long limit rod; 331. Limit dial; 4. Fixed tube; 41. Cutting plate; 411. Spring through hole; 412. Guide groove; 413. Support plate; 414. Return spring; 42. Cutting knife; 421. Guide protrusion; 5. Connecting spring; 6. Bellows. Detailed Description of the Invention

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. That is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the detailed description of the embodiments of the present invention provided in the drawings below is not intended to limit the scope of the present invention claimed, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present invention.

[0036] The following will be combined with Figure 1-10 to illustrate the specific implementation of the present invention. A coil spring that can be mechanically released in segments includes

[0037] An end head 1, in the middle of the end head 1 is provided with a bellows 6, the bellows 6 is made of a metal material. Specifically, the bellows 6 can be bent along with the connecting spring 5 through the provided corrugations. At the same time, the metal bellows 6 can generate deformation during cutting to further assist in fixing and prevent falling off. Fibrous hairs are wound around the periphery of the bellows 6 to promote thrombus formation. The fibrous hairs can be wound around the outside of the bellows 6 at intervals, not shown in the drawings. While the blood is flowing, the blood viscosity can be reduced and the blood flow velocity can be increased to accelerate the formation of thrombus, which is prior art and not the inventive point of the present invention, so it will not be elaborated further.

[0038] The outer guide tube 2 is provided with a fixed tube 4 in the middle. One end of the fixed tube 4 leads into the middle of the outer guide tube 2. A connecting spring 5 is provided in the middle of the fixed tube 4. The connecting spring 5 shown in the attached drawing only shows its structural position and not the actual proportion. It is actually relatively compact. One end of the connecting spring 5 is fixedly connected to the end head 1. The corrugated tube 6 leads into the middle of the connecting spring 5. Several cutting parts are provided in the inner cavity of one end of the outer guide tube 2 near the end head 1 for dividing and supporting the corrugated tube 6;

[0039] The cutting spring part is arranged between the outer guide tube 2 and the fixed tube 4 for cutting the connecting spring 5. The cutting spring part includes a cutting tube 3. The cutting tube 3 sleeved on the fixed tube 4 is arranged between the fixed tube 4 and the outer guide tube 2. One end of the cutting tube 3 is provided with a rotating ring 31. The rotating ring 31 leads into and is rotatably connected to the end of the fixed tube 4. Specifically, the rotating ring 31 presents an L-shaped rotating body structure with the short side facing outwards. The outer peripheral side of the short side of the rotating ring 31 is fixedly connected to the inner cavity of the cutting tube 3. One end of the outer guide tube 2 leads into and is rotatably connected between the cutting tube 3 and the rotating ring 31. The inner cavity of one end of the fixed tube 4 is also provided with a cutting plate 41. A spring through hole 411 is provided in the middle of the cutting plate 41. The corrugated tube 6 leads into the spring through hole 411. A cutting knife 42 is provided on one side of the cutting plate 41. The cutting knife 42 is attached to and slidably connected to the cutting plate 41. A bevel edge notch 32 is provided on the side of the rotating ring 31 close to the cutting plate 41. The cutting knife 42 leads into the middle of the bevel edge notch 32. A guiding groove 412 is provided on the cutting plate 41. The guiding direction of the guiding groove 412 is the same as the moving direction of the cutting knife 42. A guiding protrusion 421 is provided on the cutting knife 42. The guiding protrusion 421 leads into and is slidably connected to the guiding groove 412. A supporting plate 413 is also provided on the cutting plate 41. A return spring 414 is provided between the supporting plate 413 and the cutting knife 42.

[0040] In implementation, rotate the outer guide tube 2 so that the rotating dial 21 abuts against one end of the adjacent tail fixed tube 22. After determining the required length of the corrugated tube 6, fix the fixed tube 4 and rotate the cutting tube 3. The cutting tube 3 drives the rotating ring 31 to rotate self, and at the same time drives the bevel edge notch 32 to squeeze the cutting knife 42 to move along the guiding direction of the guiding protrusion 421 and the guiding groove 412. At the same time, the cutting knife 42 cuts the connecting spring 5 in the spring through hole 411 to cut off the connecting spring 5. Then rotate the cutting tube 3 in the reverse direction so that the cutting knife 42 returns to its position under the action of the return spring 414, completing the control of the required length of the connecting spring 5.

[0041] Beneficially, the material of the connecting spring 5 is platinum-tungsten alloy; or a combination of one or more of platinum, tungsten, gold, silver, tantalum, nickel-titanium alloy, cobalt-chromium alloy, platinum-iridium alloy; or a polymer material.

[0042] Further, the tube cutting member is arranged in the inner cavity of the connecting spring 5, and the tube cutting member includes a tail fixing tube 22 and an end fixing tube 23, the tail fixing tube 22 is arranged at one end close to the end head 1, and the middle of the tail fixing tube 22 and the end fixing tube 23 are respectively provided with a first fixing block 221 and a second fixing block 231, the bellows 6 passes through and is slidably connected to the second fixing block 231, and a plurality of spring support frames 24 are arranged on the outer side of the tail fixing tube 22 and the end fixing tube 23, and the spring support frame 24 abuts against the inner cavity of the bellows 6, and a support lever 232 passing into the inner cavity of the tail fixing tube 22 is arranged on the second fixing block 231, and a cutting knife 222 is arranged in the inner cavity of the tail fixing tube 22, and the cutting knife 222 is arranged near the first fixing block 221 to the end fixing tube 2 3, a fixing block 224 is further provided on the inner cavity side of the tail fixing tube 22, a shearing knife 223 is provided on the fixing block 224, one end of the shearing knife 223 is hinged to the fixing block 224, the bellows 6 separates the cutting knife 222 and the shearing knife 223 on both sides of the bellows 6 through the first fixing block 221, and the supporting lever 232 abuts against the side of the shearing knife 223 away from the cutting knife 222; two groups of symmetrically arranged limiting grooves 25 are provided on the outer sides of the tail fixing tube 22 and the end fixing tube 23, and two groups of symmetrically arranged long limiting rods 33 are provided on the side of the rotating ring 31 close to the end head 1, and a plurality of limiting dial plates 331 are provided on the long limiting rods 33, and the limiting dial plates 331 pass through the gap of the connecting spring 5 and are slidably connected to the adjacent limiting grooves 25.

[0043] Furthermore, two sets of symmetrically arranged rotating plates 21 are provided on the inner cavity side of the middle part of the outer guide tube 2. The rotating plates 21 are provided at one end of the long limiting rod 33 away from the rotating ring 31. The rotating plates 21 pass through the gap of the connecting spring 5 and enter the limiting groove 25 in the adjacent tail fixing tube 22.

[0044] In practice, the outer guide tube 2 is rotated, and the connecting spring 5 is continuously rotated. Under the rotation action of the connecting spring 5, the tail fixing tube 22 and the end fixing tube 23 gradually pass through the port of the outer guide tube 2 until the rotating dial plate 21 on the outer guide tube 2 falls into the limiting groove 25 in the adjacent tail fixing tube 22. Then, the connecting spring 5 is stopped from rotating and the cutting tube 3 is fixed. The outer guide tube 2 is rotated. Under the fixation of the limiting dial plate 331, the outer guide tube 2 drives the tail fixing tube 22 to rotate. As the supporting dial rod 232 passes into the shear knife 223 is on the side away from the cutting knife 222. When the tail fixed tube 22 rotates, it is acted upon by the support lever 232 on the fixed end fixed tube 23 to push the shear knife 223 to squeeze the bellows 6 close to the cutting knife 222, so that the bellows 6 is flattened and deformed and cannot pass through the first fixed block 221 and the second fixed block 231. At the same time, the shear knife 223 and the cutting knife 222 form a shearing structure to cut off the bellows 6, thereby realizing the detachment of the segmented connecting spring 5 and the release of the connecting springs 5 of different lengths.

[0045] Working principle of the present invention:

[0046] The operator first screws the connecting spring 5 into the fixed tube 4, and then one end of the connecting spring 5 passes through the spring through hole 411 and the spring support frame 24 in turn and abuts against the end head 1. After the limit plate 331 and the rotating plate 21 are set in the gap of the connecting spring 5, the operation begins. First, the outer guide tube 2 is rotated so that the rotating plate 21 abuts against one end of the adjacent tail fixed tube 22. After the required length of the corrugated tube 6 is determined, the fixed tube 4 is fixed and the cutting tube 3 is rotated. The cutting tube 3 drives the rotating ring 31 to rotate, and at the same time drives the bevel notch 32 to squeeze the cutter 42 along the guide protrusion. 421 and the guide direction of the guide groove 412, and at the same time, the cutter 42 cuts the connecting spring 5 in the spring through hole 411 to cut off the connecting spring 5, and then the cutting tube 3 is rotated in the opposite direction, so that the cutter 42 is restored to its position by the action of the reset spring 414, and the required length of the connecting spring 5 is controlled. Second, the connecting spring 5 is rotated continuously. Since there is less gap in the fixed tube 4, the segmented connecting spring 5 is also pushed by the end to continue to rotate forward, driving the end 1 away from the outer guide tube 2, and the connecting spring 5 can be sent into the blood vessel in this way. Third, the connecting spring 5 is sent After insertion, in order to prevent the connecting spring 5 from being released and lengthened, it is necessary to cut part of the corrugated tube 6 to connect the two ends of the connecting spring 5 for fixing. First, rotate the outer guide tube 2, and continue to rotate the connecting spring 5. Under the rotation of the connecting spring 5, the tail fixing tube 22 and the end fixing tube 23 gradually pass through the port of the outer guide tube 2 until the rotating dial plate 21 on the outer guide tube 2 falls into the limiting groove 25 in the adjacent tail fixing tube 22. Then stop rotating the connecting spring 5 and fix the cutting tube 3. Rotate the outer guide tube 2. Under the fixation of the limiting dial plate 331, the outer guide tube 2 toggles the tail fixing tube 22 and the end fixing tube 23. The tube 22 rotates, and since the support lever 232 is passed into the side of the shear knife 223 away from the cutting knife 222, when the tail fixed tube 22 rotates, it is acted upon by the support lever 232 on the fixed end fixed tube 23, and the shear knife 223 is pushed to squeeze the bellows 6 close to the cutting knife 222, so that the bellows 6 is flattened and deformed, and cannot pass through the first fixed block 221 and the second fixed block 231. At the same time, the shear knife 223 and the cutting knife 222 form a shearing structure, and the bellows 6 is cut off, so that the segmented connection spring 5 can be separated, and the connection springs 5 of different lengths can be released;

[0047] Then continue to rotate the connecting spring 5. After the connecting spring 5 drives the end fixing tube 23 to pass through the outer guide tube 2 through the friction force, steps one to three can be repeated, and the end fixing tube 23 separated from the tail fixing tube 22 can be used as a new "end 1".

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] The above content is only an example and explanation of the structure of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments, or use similar methods for substitution, as long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

Claims

1. A mechanically detachable coil that can be segmented, characterized in that: including a head (1), in the middle of which there is a corrugated pipe (6); an outer guide pipe (2), in the middle of which there is a fixed pipe (4). One end of the fixed pipe (4) extends into the middle of the outer guide pipe (2). A connecting spring (5) is arranged in the middle of the fixed pipe (4). One end of the connecting spring (5) is fixedly connected to the head (1). The corrugated pipe (6) extends into the middle of the connecting spring (5). In the inner cavity of one end of the outer guide pipe (2) close to the head (1), there are several pipe cutting parts for dividing and supporting the corrugated pipe (6); a spring cutting part arranged between the outer guide pipe (2) and the fixed pipe (4) for cutting the connecting spring (5); the spring cutting part includes a cutting pipe (3). The cutting pipe (3) sleevingly connects the fixed pipe (4) and is arranged between the fixed pipe (4) and the outer guide pipe (2). One end of the cutting pipe (3) is provided with a rotating ring (31). The rotating ring (31) extends into and rotatably connects to the end of the fixed pipe (4). In the inner cavity of one end of the fixed pipe (4), there is also a cutting plate (41). A spring through hole (411) is arranged in the middle of the cutting plate (41). The corrugated pipe (6) extends into the spring through hole (411). A cutter (42) is arranged on one side of the cutting plate (41). The cutter (42) is attached to and slidably connected to the cutting plate (41). A bevel notch (32) is arranged on one side of the rotating ring (31) close to the cutting plate (41). The cutter (42) extends into the middle of the bevel notch (32).

2. The detachable coil spring that can be mechanically disengaged in sections according to claim 1, wherein: Fiber hairs are wound around the periphery of the corrugated pipe (6) to promote thrombus formation.

3. The detachable coil spring capable of being mechanically disengaged in sections according to claim 1, wherein: The material of the connecting spring (5) is platinum-tungsten alloy; or a combination of one or more of platinum, tungsten, gold, silver, tantalum, nitinol alloy, cobalt-chromium alloy, platinum-iridium alloy; or a polymer material.

4. The detachable coil spring capable of being mechanically disengaged in sections according to claim 1, wherein: The rotating ring (31) presents an L-shaped rotating body structure with the short side facing outwards. The outer periphery of the short side of the rotating ring (31) is fixedly connected to the inner cavity of the cutting pipe (3). One end of the outer guide pipe (2) extends into and rotatably connects between the cutting pipe (3) and the rotating ring (31).

5. The detachable coil spring that can be mechanically detached in segments according to claim 1, characterized in that: A guiding groove (412) is arranged on the cutting plate (41). The guiding direction of the guiding groove (412) is the same as the moving direction of the cutter (42). A guiding protrusion (421) is arranged on the cutter (42). The guiding protrusion (421) extends into and slidably connects to the guiding groove (412). A supporting plate (413) is also arranged on the cutting plate (41). A reset spring (414) is arranged between the supporting plate (413) and the cutter (42).

6. The detachable coil spring that can be mechanically disengaged in sections according to claim 1, wherein: The pipe cutting member is arranged inside the cavity of the connecting spring (5). The pipe cutting member includes a tail fixing pipe (22) and an end fixing pipe (23). The tail fixing pipe (22) is arranged at one end close to the end head (1). A first fixing block (221) and a second fixing block (231) are respectively arranged in the middle parts of the tail fixing pipe (22) and the end fixing pipe (23). The corrugated pipe (6) penetrates and is slidably connected to the second fixing block (231). A plurality of spring support frames (24) are arranged on the outer peripheral sides of the tail fixing pipe (22) and the end fixing pipe (23). The spring support frames (24) abut against the inner cavity of the corrugated pipe (6). A support lever (232) that leads into the inner cavity of the tail fixing pipe (22) is arranged on the second fixing block (231). A cutting knife (222) is arranged in the inner cavity of the tail fixing pipe (22). The cutting knife (222) is arranged on one side of the first fixing block (221) close to the end fixing pipe (23). A fixing block (224) is further arranged on the inner cavity side of the tail fixing pipe (22). A shear knife (223) is arranged on the fixing block (224). One end of the shear knife (223) is hinged to the fixing block (224). The corrugated pipe (6) separates the cutting knife (222) and the shear knife (223) on both sides of the corrugated pipe (6) through the first fixing block (221). The support lever (232) abuts against the side of the shear knife (223) far from the cutting knife (222).

7. The detachable coil spring that can be mechanically disengaged in sections according to claim 6, wherein: Two groups of symmetrically arranged limit grooves (25) are arranged on the outer peripheral sides of the tail fixing pipe (22) and the end fixing pipe (23). Two groups of symmetrically arranged long limit rods (33) are arranged on the side of the rotating ring (31) close to the end head (1). A plurality of limit plates (331) are arranged on the long limit rods (33). The limit plates (331) pass through and are slidably connected to the adjacent limit grooves (25) after passing through the gap of the connecting spring (5).

8. The mechanically detachable coil according to claim 7, wherein: Two groups of symmetrically arranged rotating plates (21) are further arranged on the inner cavity side in the middle of the outer guiding pipe (2). The rotating plates (21) are arranged at the ends of the long limit rods (33) far from the rotating ring (31). The rotating plates (21) pass through the gap of the connecting spring (5) and then lead into the limit grooves (25) inside the adjacent tail fixing pipe (22).

9. The detachable coil spring that can be mechanically disengaged in sections according to claim 1, wherein: The corrugated pipe (6) is made of a metal material.

Images