A matching structure, a spring ring, a pushing member and a releasing device

Abstract

The present invention discloses a matching structure, a spring coil, a pushing member and a releasing device. The matching structure comprises: a spring coil and a pushing member. The spring coil is connected to the pushing member. In the spring coil and the pushing member, one of them has a connecting portion, and the other has a locking portion. When the spring coil and the pushing member rotate relative to each other in the axial direction, the connecting portion is inserted into the locking portion so that the spring coil is limited in a limiting state in the pushing member; and a releasing state in which the connecting portion is rotated out of the locking portion. The matching structure is switched between a limiting state and a releasing state. By rotating the pushing member, the spring coil and the pushing member can be freely switched between a limiting state and a releasing state, and the released spring coil can be re-limited on the pushing member to facilitate position adjustment or withdraw the spring coil to replace spring coils of different models.

Description

Technical Field

[0001] The invention relates to the technical field of spring coil release, and in particular to a matching structure, a spring coil, a pushing member and a releasing device. Background Art

[0002] The coil is a medical device used to treat aneurysms. During treatment, the coil is inserted into the aneurysm. After reaching the lesion site, the coil fills the aneurysm and prevents blood from entering the aneurysm, thus achieving the purpose of preventing the aneurysm from rupturing.

[0003] In the prior art, a release ball is provided at one end of the spring coil, and the release ball is placed in the push rod. The spring coil is limited at the end of the push rod by the limit part of the push rod and the release wire. After the spring coil is released, the release ball is separated from the limit part and the release wire. However, if the release position of the spring coil is wrong or the model of the spring coil is wrong, the user cannot re-limit the release ball in the push rod in the blood vessel, resulting in the inability to adjust the position of the spring coil or replace a spring coil of a different model after the spring coil is released. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the position of the spring coil cannot be adjusted or a spring coil of a different model cannot be replaced after the spring coil is released.

[0005] To this end, the present invention proposes a matching structure, comprising:

[0006] The spring ring and the push piece are connected to each other.

[0007] In the spring ring and the pushing member, one of them has a connecting portion, and the other of them has a locking portion;

[0008] When the spring ring and the pushing member rotate relative to each other in the axial direction, the connecting part is inserted into the locking part to limit the spring ring in the pushing member in a limiting state; and the connecting part is rotated out of the locking part in a releasing state, and the matching structure is switched between the limiting state and the releasing state.

[0009] Furthermore, a limiting groove is provided on the connecting portion; and the locking portion protrudes toward the axial direction of the pushing member and is arranged corresponding to the limiting groove.

[0010] Furthermore, a locking surface is arranged on the limiting groove, and an unlocking surface is also arranged on the connecting portion, and the locking surface and the unlocking surface are connected and arranged at an angle.

[0011] Furthermore, the intersection of the locking surface and the unlocking surface is arranged in an arc shape.

[0012] Furthermore, the surface of the locking portion is arc-shaped.

[0013] Furthermore, a fixing portion is fixedly arranged on one side of the connecting portion, and a radial radius of the fixing portion is greater than a distance from the locking portion to an axis of the pushing member.

[0014] A spring ring, suitable for connecting with a pushing member, comprising:

[0015] A spring coil body and a locking member connected thereto;

[0016] The locking member has a connecting portion, and the connecting portion is suitable for limiting cooperation with the locking portion of the pushing member;

[0017] When the locking member rotates relative to the pushing member, the spring ring has a limiting fit on the locking portion to limit the relative sliding of the limiting spring ring and the pushing member in the axial direction, or to be separated from the locking portion to release the axial locking.

[0018] Furthermore, the locking member has a fixing portion connected to the connecting portion, an insertion portion is arranged at one end of the fixing portion close to the spring coil body, and the insertion portion is embedded in a through hole of the spring coil body.

[0019] A pusher, suitable for connecting with a spring coil, comprising:

[0020] A connected spring rod and a connecting rod;

[0021] The connecting rod is arranged at the end of the spring rod, and a locking portion is arranged at the end of the connecting rod protruding in the axial direction of the pushing member; the locking portion is suitable for limiting cooperation with the limiting groove of the locking member;

[0022] When the locking member rotates relative to the pushing member, the spring ring has a limiting fit on the locking portion to limit the relative sliding of the limiting spring ring and the pushing member in the axial direction, or to be separated from the locking portion to release the axial locking.

[0023] Furthermore, the cross section of the spring wire wound around the spring rod is rectangular.

[0024] A releasing device comprises a sleeve, wherein the spring ring and the pushing member are rotatably arranged in the sleeve.

[0025] The technical solution of the present invention has the following advantages:

[0026] 1. The matching structure provided by the present invention comprises: a spring coil and a push member. The spring coil is connected to the push member. One of the spring coil and the push member has a connecting portion, and the other has a locking portion. When the spring coil and the push member rotate relative to each other in the axial direction, the connecting portion is inserted into the locking portion so that the spring coil is limited in a limited state in the push member; and a released state in which the connecting portion is rotated out of the locking portion. The matching structure is switched between the limited state and the released state.

[0027] In this matching structure, the user applies a rotational force to the proximal end of the push member, and the push member rotates in the axial direction, so that the connecting part is inserted into the locking part, that is, the spring coil is limited in the limited state in the push member. In the limited state, the user applies a driving force to the push member, and the spring coil moves in the blood vessel by pushing or pulling back the push member, that is, the push member is driven to transport the spring coil to the specified position in the blood vessel. The user applies a rotational force to the proximal end of the push member, so that the connecting part rotates out of the locking part, that is, the spring coil is in a released state. In the released state, the user can release the spring coil at the specified position in the blood vessel. If the release position of the spring coil is wrong or the model of the spring coil is wrong, the user can re-limit the released spring coil on the push member in the blood vessel, that is, the position of the released spring coil can be adjusted or the spring coil can be withdrawn to replace the spring coil of a different model.

[0028] 2. The matching structure provided by the present invention has a limiting groove on the connecting part, and the locking part is protruded toward the axial direction of the pushing member, and the locking part and the limiting groove are arranged correspondingly. The locking part and the limiting groove cooperate to realize the free switching of the spring coil and the pushing member in the limiting state and the released state by rotating the pushing member, and the released spring coil can be re-limited on the pushing member to facilitate position adjustment or withdrawal of the spring coil to replace spring coils of different models.

[0029] 3. The matching structure provided by the present invention has a locking surface on the limiting groove and an unlocking surface on the connecting part, and the locking surface and the unlocking surface are connected at an angle. When the locking part faces the unlocking surface, the spring ring is in a released state; when the locking part faces the locking surface, the spring ring is in a limited state; when the released spring ring needs to be re-limited, the locking part is first directed toward the unlocking surface, and the pusher is rotated, that is, the locking part is rotated, so that the locking part faces the locking surface, and the spring ring is in a limited state again.

[0030] 4. In the matching structure provided by the present invention, the intersection of the locking surface and the unlocking surface is arranged in an arc shape, so that when the locking part is rotated, the locking part can smoothly transition from the locking surface to the unlocking surface, thereby preventing the locking part from rotating to the intersection of the locking surface and the unlocking surface and getting stuck.

[0031] 5. In the matching structure provided by the present invention, a fixing part is fixedly arranged on one side of the connecting part, and the radial radius of the fixing part is greater than the distance from the locking part to the axis of the pushing member. The locking part is limited by the fixing part, and when the locking part is pressed against one side of the fixing part, the rotation path of the locking part passes through the limiting groove, which facilitates the locking part to rotate into the limiting groove, so that the spring coil is in the limited state again.

[0032] 6. The spring ring provided by the present invention is suitable for connecting with a pusher, and comprises: a spring ring body and a locking member. The spring ring body is connected to the locking member, and the locking member has a connecting portion, and the connecting portion is suitable for limiting the locking portion of the pusher. When the locking member rotates relative to the pusher, the spring ring has a limiting fit on the locking portion to limit the relative sliding of the spring ring and the pusher in the axial direction, or to disengage from the locking portion to release the axial locking.

[0033] For this spring coil, the user applies a rotational force to the proximal end of the push member, and the push member rotates in the axial direction, so that the connecting part is inserted into the locking part, that is, the spring coil is limited in the limited state in the push member. In the limited state, the user applies a driving force to the push member, and the spring coil moves in the blood vessel by pushing or pulling back the push member, that is, the push member is driven to transport the spring coil to the specified position in the blood vessel. The user applies a rotational force to the proximal end of the push member, so that the connecting part rotates out of the locking part, that is, the spring coil is in a released state. In the released state, the user can release the spring coil at the specified position in the blood vessel. If the release position of the spring coil is wrong or the model of the spring coil is wrong, the user can re-limit the released spring coil on the push member in the blood vessel, that is, the position of the released spring coil can be adjusted or the spring coil can be withdrawn to replace a spring coil of a different model.

[0034] 7. The spring coil provided by the present invention, the locking piece also includes a fixing portion, the fixing portion is connected to the connecting portion, an insertion portion is arranged at one end of the fixing portion close to the spring coil body, the insertion portion is embedded in the through hole of the spring coil body, so as to ensure that the spring coil body and the locking piece are firmly fixed and prevent the spring coil body from being separated from the locking piece.

[0035] 8. The pusher provided by the present invention is suitable for connecting with a spring ring, and comprises: a spring rod and a connecting rod. The connecting rod is arranged at the end of the spring rod, and the end of the connecting rod protrudes in the axial direction of the pusher to provide a locking portion, and the locking portion is suitable for limiting cooperation with the limiting groove of the locking portion. When the locking portion rotates relative to the pusher, the spring ring has a limiting cooperation on the locking portion to limit the relative sliding of the spring ring and the pusher in the axial direction, or is separated from the locking portion to release the axial locking.

[0036] For this push member, the user applies a rotational force to the proximal end of the push member, and the push member rotates in the axial direction, so that the connecting part is inserted into the locking part, that is, the spring coil is limited in the limited state in the push member. In the limited state, the user applies a driving force to the push member, and the spring coil moves in the blood vessel by pushing or pulling back the push member, that is, the push member is driven to transport the spring coil to the specified position in the blood vessel. The user applies a rotational force to the proximal end of the push member, so that the connecting part rotates out of the locking part, that is, the spring coil is in a released state. In the released state, the user can release the spring coil at the specified position in the blood vessel. If the release position of the spring coil is wrong or the model of the spring coil is wrong, the user can re-limit the released spring coil on the push member in the blood vessel, that is, the position of the released spring coil can be adjusted or the spring coil can be withdrawn to replace the spring coil of a different model.

[0037] 9. The push member provided by the present invention has a spring wire with a rectangular cross section around the spring rod. The spring rod is arranged on the push member to ensure that the push member has a certain degree of axial flexibility, so that the push member can bend in a curved blood vessel. The spring wire of the spring rod has a rectangular cross section, which is beneficial to maintaining the radial strength of the push member, and can make the distal end of the push member rotate along when the proximal end of the push member rotates.

[0038] 10. The release device provided by the present invention comprises a sleeve, a spring ring and a pusher. The spring ring and the pusher are rotatably arranged in the sleeve.

[0039] This release device inserts the spring coil and the pushing member into the sleeve, which is convenient for pushing the spring coil in the blood vessel. If the release position of the spring coil is wrong or the type of the spring coil is wrong, the user can reinsert the released spring coil into the sleeve in the blood vessel and then limit it on the pushing member, that is, the position of the released spring coil can be adjusted or the spring coil can be withdrawn to replace the spring coil of different types. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 This is a schematic diagram of the structure of the spring coil in Example 1 of the present invention;

[0042] Figure 2 It is a plan view of the spring coil in Example 1 of the present invention;

[0043] Figure 3 It is a plan view of the spring coil in Example 1 of the present invention;

[0044] Figure 4 It is a side view of the spring coil in Example 1 of the present invention;

[0045] Figure 5 It is a plan view of the matching structure in Example 1 of the present invention;

[0046] Figure 6 is a cross-sectional view of the matching structure in Example 1 of the present invention;

[0047] Figure 7 is a cross-sectional view of the matching structure in Example 1 of the present invention;

[0048] Figure 8 This is a schematic diagram of the structure of the push member in Embodiment 1 of the present invention;

[0049] Fig. 9 It is a schematic diagram of the structure of the sleeve in the matching structure in Example 1 of the present invention.

[0050] Description of reference numerals:

[0051] 1. Spring coil body; 2. Locking piece; 201. Fixing part; 202. Limiting groove; 203. Connecting part; 204. Unlocking surface; 205. Locking surface; 206. Inserting part; 3. Sleeve; 301. Through hole; 4. Pushing piece; 401. Connecting rod; 402. Locking part; 404. Spring rod. DETAILED DESCRIPTION

[0052] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0056] Example 1

[0057] This embodiment provides a matching structure, such as Figure 1-Figure 7 As shown, it includes: a spring ring and a push member 4. The spring ring is connected to the push member 4. In the spring ring and the push member 4, one of them has a connecting portion 203, and the other has a locking portion 402. When the spring ring and the push member 4 rotate relative to each other in the axial direction, the connecting portion 203 is inserted into the locking portion 402, so that the spring ring is limited in the limited state in the push member 4; and the connecting portion 203 is rotated out of the locking portion 402 in the release state. The matching structure is switched between the limited state and the release state.

[0058] Specifically, Figure 1-3 As shown, the connecting portion 203 can be arranged on the spring coil. Figure 6-8 As shown, the locking portion 402 can be provided on the pushing member 4. The connecting portion 203 cooperates with the locking portion 402 to achieve a switching setting of the cooperation structure between a limiting state and a released state.

[0059] In this matching structure, the user applies a rotational force to the proximal end of the push member 4, and the push member 4 rotates in the axial direction, so that the connecting portion 203 is inserted into the locking portion 402, that is, the spring coil is limited in the limited state in the push member 4. In the limited state, the user applies a driving force to the push member 4, and the spring coil moves in the blood vessel by pushing or pulling back the push member 4, that is, the push member 4 is driven to transport the spring coil to the specified position in the blood vessel. The user applies a rotational force to the proximal end of the push member 4, so that the connecting portion 203 rotates out of the locking portion 402, that is, the spring coil is in a released state. In the released state, the user can release the spring coil at the specified position in the blood vessel. If the release position of the spring coil is wrong or the model of the spring coil is wrong, the user can re-limit the released spring coil on the push member in the blood vessel, that is, the position of the released spring coil can be adjusted or the spring coil can be withdrawn to replace the spring coil of different models.

[0060] Specifically, Figure 1-Figure 2As shown, the connection portion 203 is provided with a limiting groove 202, and the limiting groove 202 can be a square groove, so that the locking portion 402 can be rotated into the limiting groove 202. Figure 6-8 As shown, the locking portion 402 is protruded toward the axial direction of the push member 4, and the locking portion 402 is arranged corresponding to the limiting groove 202. For example, the locking portion 402 can be in a rectangular parallelepiped, a semicircular body or a fan shape, etc., to ensure that the locking portion 402 can be inserted into the limiting groove 202 and rotated out of the limiting groove 202. The locking portion 402 cooperates with the limiting groove 202, and the spring coil and the push member can be freely switched between the limiting state and the released state by rotating the push member, and the released spring coil can be re-limited on the push member, so as to facilitate position adjustment or withdraw the spring coil to replace the spring coil of different models.

[0061] Specifically, Figure 4 As shown, a locking surface 205 is provided on the limiting groove 202, and an unlocking surface 204 is provided on the connecting portion 203, and the locking surface 205 is connected to the unlocking surface 204 at an angle. For example, the locking surface 205 and the unlocking surface 204 are arranged at 90 degrees, so as to ensure that the locking portion 402 can be rotated from the locking surface 205 to the unlocking surface 204, or the locking portion 402 can be rotated from the unlocking surface 204 to the locking surface 205. When the locking portion 402 faces the unlocking surface 204, the spring coil is in a released state; when the locking portion 402 faces the locking surface 205, the spring coil is in a limited state; when the released spring coil needs to be re-limited, the locking portion 402 is firstly directed toward the unlocking surface 204, and the pusher is rotated, that is, the locking portion 402 is rotated, so that the locking portion 402 faces the locking surface 205, so that the spring coil is in a limited state again.

[0062] Specifically, Figure 4 As shown, the intersection of the locking surface 205 and the unlocking surface 204 is arranged in an arc shape. The arc shape can be an arc or a non-arc shape, so that when the locking part 402 is rotated, the locking part 402 can smoothly transition from the locking surface 205 to the unlocking surface 204, preventing the locking part 402 from rotating to the intersection of the locking surface 205 and the unlocking surface 204 and getting stuck.

[0063] Specifically, Figure 8 As shown, the surface of the locking portion 402 is arc-shaped, so that the locking portion 402 can slide on the locking surface 205 and the unlocking surface 204. Further, when the locking portion 402 is rotated, the locking portion 402 can smoothly transition from the locking surface 205 to the unlocking surface 204.

[0064] Specifically, Figure 1-3 As shown, a fixing portion 201 is fixedly arranged on one side of the connecting portion 203, and a radial radius of the fixing portion 201 is greater than a distance from the locking portion 402 to the axis of the pushing member 4. Figure 6-7As shown, the locking portion 402 is limited by the fixing portion 201. When the locking portion 402 is against one side of the fixing portion 201, the rotation path of the locking portion 402 passes through the limiting groove 202, which facilitates the locking portion 402 to rotate into the limiting groove 202, so that the spring coil is in the limited state again.

[0065] The present invention also provides a spring coil, such as Figure 1-Figure 4 As shown, the spring ring is suitable for connecting with the push member 4, and includes: a spring ring body 1 and a locking member 2. The spring ring body 1 is fixedly connected with the locking member 2, for example, the spring ring body 1 and the locking member 2 can be fixed by welding or bonding. The locking member 2 has a connecting portion 203, and the connecting portion 203 is suitable for limiting the locking portion 402 of the push member 4. When the locking member 2 rotates relative to the push member 4, the spring ring has a limiting fit on the locking portion 402 to limit the relative sliding of the spring ring and the push member in the axial direction, or disengages from the locking portion 402 to release the axial locking.

[0066] For this spring coil, the user applies a rotational force to the proximal end of the push member 4, and the push member 4 rotates in the axial direction, so that the connecting portion 203 is inserted into the locking portion 402, that is, the spring coil is limited in the limited state in the push member 4. In the limited state, the user applies a driving force to the proximal end of the push member 4, and the spring coil moves in the blood vessel by pushing or pulling back the push member 4, that is, the push member 4 is driven to transport the spring coil to the specified position in the blood vessel. The user applies a rotational force to the proximal end of the push member 4, so that the connecting portion 203 rotates out of the locking portion 402, that is, the spring coil is in a released state. In the released state, the user can release the spring coil at the specified position in the blood vessel. If the release position of the spring coil is wrong or the model of the spring coil is wrong, the user can re-limit the released spring coil on the push member in the blood vessel, that is, the position of the released spring coil can be adjusted or the spring coil can be withdrawn to replace a spring coil of a different model.

[0067] Specifically, Figure 1-3 As shown, the locking member 2 also includes a fixing portion 201, which is connected to the connecting portion 203, and the fixing portion 201 is arranged between the connecting portion 203 and the spring coil body 1. An insertion portion 206 is arranged at one end of the fixing portion 201 close to the spring coil body 1. The insertion portion 206 can be cylindrical, and the insertion portion 206 is embedded in the through hole of the spring coil body 1. The insertion portion 206 and the through hole of the spring coil body 1 have an interference fit to ensure that the spring coil body 1 and the locking member 2 are firmly fixed to prevent the spring coil body 1 from detaching from the locking member 2.

[0068] The present invention also provides a pushing member 4, such as Figure 6-8As shown, the push member 4 is suitable for connecting with the spring ring, and includes: a spring rod 404 and a connecting rod 401. The connecting rod 401 is arranged at the end of the spring rod 404, and the end of the connecting rod 401 protrudes in the axial direction of the push member to provide a locking portion 402, and the locking portion 402 is suitable for limiting the position with the limiting groove 202 of the locking member 2. When the locking member 2 rotates relative to the push member 4, the spring ring has a limiting fit on the locking portion 402 to limit the relative sliding of the spring ring and the push member 4 in the axial direction, or is separated from the locking portion 402 to release the axial locking.

[0069] The user applies a rotational force to the proximal end of the push member 4, and the push member 4 rotates in the axial direction, so that the connecting portion 203 is inserted into the locking portion 402, that is, the spring coil is limited in the limited state in the push member 4. In the limited state, the user applies a driving force to the proximal end of the push member 4, and the spring coil moves in the blood vessel by pushing or pulling back the push member 4, that is, the push member 4 is driven to transport the spring coil to the specified position in the blood vessel. The user applies a rotational force to the proximal end of the push member 4, so that the connecting portion 203 rotates out of the locking portion 402, that is, the spring coil is in a released state. In the released state, the user can release the spring coil at the specified position in the blood vessel. If the release position of the spring coil is wrong or the model of the spring coil is wrong, the user can re-limit the released spring coil on the push member in the blood vessel, that is, the position of the released spring coil can be adjusted or the spring coil can be withdrawn to replace the spring coil of different models.

[0070] Specifically, Figure 6-7 As shown, the cross section of the spring wire wound around the spring rod 404 is rectangular, and the spring rod 404 is arranged on the pusher to ensure that the pusher has a certain degree of flexibility in the axial direction, so that the pusher can bend in a curved blood vessel; the cross section of the spring wire of the spring rod 404 is rectangular, which is conducive to maintaining the radial strength of the pusher 4, and can make the distal end of the pusher 4 rotate with it when the proximal end of the pusher 4 rotates. As a further deformation, the cross section of the spring wire can also be trapezoidal, square or polygonal, etc.

[0071] The present invention also provides a release device, such as Figure 5-Figure 7 As shown, it comprises a sleeve 3, a spring ring and a push member 4. The spring ring and the push member 4 are rotatably arranged in the sleeve 3.

[0072] Specifically, Fig. 9 As shown, the sleeve 3 is elastic, a through hole 301 is provided in the sleeve 3, the sleeve 3 and the pusher 4 are interference fit, and when in use, the spring coil can be pushed to a designated position of the blood vessel by pushing the sleeve 3. The maximum diameter of the locking member 2 of the spring coil is smaller than the diameter of the sleeve through hole 301, so as to ensure that the spring coil will not rotate with the pusher 4.

[0073] This release device inserts the spring coil and the pushing member 4 into the sleeve 3, which is convenient for pushing the spring coil in the blood vessel. If the release position of the spring coil is wrong or the type of the spring coil is wrong, the user can reinsert the released spring coil into the sleeve 3 in the blood vessel and then limit it on the pushing member, that is, the position of the released spring coil can be adjusted or the spring coil can be withdrawn to replace the spring coil of different types.

[0074] When using this mate structure:

[0075] First, limit the spring ring in the pusher 4 so that the spring ring is in a limited state. Figure 6 As shown, the locking portion 402 of the pusher 4 is inserted into the limiting groove 202 of the spring coil, and then the sleeve 3 is sleeved on the pusher 4 and the locking member 2 of the spring coil, and the spring coil is in a limiting state. Since the sleeve 3 is elastic, and the diameter of the sleeve through hole 301 is slightly larger than the maximum diameter of the locking member 2, and the pusher 4 and the sleeve 3 are interference fit, the spring coil is limited on the pusher 4, effectively preventing the spring coil, the pusher 4 and the sleeve 3 from being separated during the process of pushing the sleeve 3. When the spring coil is in the limiting state, the user can insert the sleeve 3 into the blood vessel, and push the sleeve 3 to push the spring coil to the specified position in the blood vessel.

[0076] When the spring coil reaches the designated position in the blood vessel, the user applies a rotational force to the proximal end of the pusher 4, and the pusher 4 rotates 90° in the axial direction (when the locking surface 205 and the unlocking surface 204 are arranged at 90°). Since the maximum diameter of the locking element 2 of the spring coil is smaller than the diameter of the sleeve through hole 301, the spring coil will not rotate with the pusher 4. Figure 7 As shown, the connecting portion 203 is rotated out of the locking portion 402, that is, the spring coil is in a released state. In the released state, the user pulls the pusher 4 to separate the spring coil from the sleeve 3, so that the spring coil is released at a specified position in the blood vessel.

[0077] When it is necessary to re-limit the released spring coil, firstly turn the locking part 402 toward the unlocking surface 204, push the pushing member 4 so that the locking part 402 presses against one side of the fixing part 201, and at this time, the rotation path of the locking part 402 passes through the limiting groove 202. Rotate the pushing member, the locking part 402 rotates, so that the locking part 402 is transferred into the limiting groove 202, that is, the locking part 402 faces the locking surface 205, so that the spring coil is in the limiting state again. By rotating the pushing member, the spring coil and the pushing member can be freely switched between the limiting state and the released state, and the released spring coil can be re-limited on the pushing member, so as to facilitate position adjustment or withdraw the spring coil to replace the spring coil of different models.

[0078] As a first replaceable implementation of Example 1, the connecting portion 203 can be set on the pushing member 4, and the locking portion 402 can be set on the spring coil. Through the cooperation between the connecting portion 203 and the locking portion 402, the cooperation structure can be switched between the limiting state and the release state.

[0079] As a second alternative implementation of Example 1, the angle between the locking surface 205 and the unlocking surface 204 can be 120°, 135° or 145°, etc., to ensure that the locking part 402 can be rotated from the locking surface 205 to the unlocking surface 204, or the locking part 402 can be rotated from the unlocking surface 204 to the locking surface 205.

[0080] As a third replaceable implementation of Example 1, the insertion portion 206 can also be in other shapes. For example, the insertion portion 206 is in a truncated cone shape, so that the insertion portion 206 can be embedded in the through hole of the spring coil body 1. The insertion portion 206 and the through hole of the spring coil body 1 have an interference fit to ensure that the spring coil body 1 and the locking piece 2 are firmly fixed to prevent the spring coil body 1 and the locking piece 2 from detaching.

[0081] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A matching structure, characterized in that: include: The spring ring and the pusher (4) are connected and arranged, In the spring ring and the pushing member (4), one of them has a connecting portion (203), and the other of them has a locking portion (402); When the spring ring and the pushing member (4) rotate relative to each other in the axial direction, the connecting portion (203) is inserted into the locking portion (402) so that the spring ring is limited in the pushing member (4) in a limited state; and the connecting portion (203) is rotated out of the locking portion (402) in a released state, and the matching structure is switched between the limited state and the released state. The connection portion (203) is provided with a limiting groove (202); the locking portion (402) protrudes in the axial direction of the pushing member (4) and is arranged corresponding to the limiting groove (202); A locking surface (205) is provided on the limiting groove (202), and an unlocking surface (204) is also provided on the connecting portion (203); the locking surface (205) and the unlocking surface (204) are connected and arranged at an angle.

2. The matching structure according to claim 1, characterized in that: The intersection of the locking surface (205) and the unlocking surface (204) is arranged in an arc shape.

3. The matching structure according to claim 2, characterized in that: The locking portion (402) has an arc-shaped surface.

4. The matching structure according to any one of claims 1 to 3, characterized in that: A fixing portion (201) is fixedly arranged on one side of the connecting portion, and a radial radius of the fixing portion (201) is greater than a distance from the locking portion (402) to an axis of the pushing member (4).

5. A spring ring, suitable for connecting with a pusher (4), characterized in that: include: A spring coil body (1) and a locking member (2) connected to each other; The locking member (2) has a connecting portion (203), and the connecting portion (203) is suitable for limited cooperation with the locking portion (402) of the pushing member (4); When the locking member (2) rotates relative to the pushing member (4), the spring ring has a limiting fit on the locking portion (402) to limit the relative sliding of the limiting spring ring and the pushing member in the axial direction, or to be separated from the locking portion (402) to release the axial locking; The connection portion (203) is provided with a limiting groove (202); the locking portion (402) protrudes in the axial direction of the pushing member (4) and is arranged corresponding to the limiting groove (202); A locking surface (205) is provided on the limiting groove (202), and an unlocking surface (204) is also provided on the connecting portion (203); the locking surface (205) and the unlocking surface (204) are connected and arranged at an angle.

6. The spring coil according to claim 5, characterized in that: The locking member (2) comprises a fixing portion (201) connected to the connecting portion (203), an inserting portion (206) is arranged at one end of the fixing portion (201) close to the spring coil body (1), and the inserting portion (206) is embedded in a through hole of the spring coil body (1).

7. A pusher, suitable for connecting with a spring coil, characterized in that: include: A spring rod (404) and a connecting rod (401) connected to each other; The connecting rod (401) is arranged at the end of the spring rod (404), and the end of the connecting rod (401) protrudes in the axial direction of the pushing member to provide a locking portion (402); the locking portion (402) is suitable for limiting cooperation with the limiting groove (202) of the locking member (2); When the locking member (2) rotates relative to the pushing member (4), the spring ring has a limiting fit on the locking portion (402) to limit the relative sliding of the limiting spring ring and the pushing member in the axial direction, or to be separated from the locking portion (402) to release the axial locking; A limiting groove (202) is provided on the connecting portion (203); the locking portion (402) protrudes in the axial direction of the pushing member (4) and is arranged corresponding to the limiting groove (202); A locking surface (205) is provided on the limiting groove (202), and an unlocking surface (204) is also provided on the connecting portion (203); the locking surface (205) and the unlocking surface (204) are connected and arranged at an angle.

8. The pushing member according to claim 7, characterized in that: The cross section of the spring wire wound around the spring rod (404) is rectangular.

9. A release device, characterized in that: It comprises a sleeve (3), wherein the spring ring and the pushing member (4) are rotatably arranged in the sleeve (3); and A matching structure, wherein the matching structure is the matching structure described in any one of claims 1-4; or a spring ring and a pushing member, wherein the spring ring is the spring ring described in any one of claims 5-6, and the pushing member is the pushing member described in claim 7 or 8.

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