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CN-122004991-A - Mechanical release structure, manufacturing process thereof and spring ring system

CN122004991ACN 122004991 ACN122004991 ACN 122004991ACN-122004991-A

Abstract

The invention discloses a mechanical release structure, a manufacturing process thereof and a spring ring system, and belongs to the technical field of medical appliances. The intracranial spring comprises a spring ring body and an anti-unwinding wire arranged in the spring ring body, the conveying assembly comprises a conveying pipe and a release wire penetrating through the conveying pipe, the mechanical release structure comprises a fixed spring and a release ring, the fixed spring is kept in the spring ring body, the release ring penetrates through the fixed spring and comprises a first section and a second section which respectively extend out of two ends of the fixed spring, the first section is arranged in the spring ring body and is connected with the anti-unwinding wire, the second section is enclosed with the end part of the fixed spring to form an annular release area, and the release wire penetrates through the annular release area and is detachably connected with the conveying pipe, so that the intracranial spring is kept at the far end of the conveying pipe. The mechanical release structure, the manufacturing process and the spring ring system improve the safety and reliability of operation.

Inventors

  • CHANG JUN
  • GUO LIYOU
  • XIA JIE

Assignees

  • 苏州中天医疗器械科技有限公司

Dates

Publication Date
20260512
Application Date
20260415

Claims (11)

  1. 1. A mechanical release structure for connecting an intracranial spring coil (200) and a delivery assembly (300), the intracranial spring coil (200) comprising a coil body (210) and an anti-unwinding wire (220) disposed within the coil body (210), the delivery assembly (300) comprising a delivery tube (310) and a release wire (320) disposed through the delivery tube (310), the mechanical release structure comprising: A stationary spring (110) retained within the spring ring body (210); the unwinding ring (120) penetrates through the fixed spring (110) and comprises a first section (121) and a second section (122) which extend out of two ends of the fixed spring (110), wherein the first section (121) is arranged in the spring ring body (210) and is connected with the unwinding wire (220), and the second section (122) and the end part of the fixed spring (110) are enclosed to form an annular unwinding area; The release wire (320) is disposed through the annular release region and is detachably connected to the delivery tube (310) such that the intracranial spring coil (200) is retained at the distal end of the delivery tube (310).
  2. 2. The mechanical release structure according to claim 1, characterized in that said first section (121) is provided with a first limit ball (1211), said anti-unwinding wire (220) being threaded through said first section (121) and being constrained between said first limit ball (1211) and said fixed spring (110).
  3. 3. The mechanical release structure according to claim 2, characterized in that the first section (121) is provided with an opening (1212), the anti-unwinding wire (220) passing through the opening (1212) to be sheathed on the first section (121).
  4. 4. The mechanical release structure according to claim 3, wherein the first section (121) is further provided with a second limiting ball (1213) and a third limiting ball (1214), the first limiting ball (1211), the second limiting ball (1213) and the third limiting ball (1214) are sequentially arranged at intervals along the extending direction of the first section (121), the third limiting ball (1214) is abutted to the end portion of the fixed spring (110), the opening (1212) is arranged between the second limiting ball (1213) and the third limiting ball (1214), and the opening (1212) is arranged on one side of the first section (121) perpendicular to the axial direction of the fixed spring (110).
  5. 5. A mechanical release structure according to claim 3, wherein the first section (121) is further provided with a fourth limit ball (1215), the fourth limit ball (1215) is abutted against the end of the fixed spring (110), the opening (1212) is provided between the first limit ball (1211) and the fourth limit ball (1215), and the opening (1212) is provided on one side of the first section (121) perpendicular to the axial direction of the fixed spring (110).
  6. 6. A mechanical release arrangement according to claim 3, wherein the first section (121) is further provided with a fifth limit ball (1216), the opening (1212) being provided between the first limit ball (1211) and the fifth limit ball (1216), the opening (1212) being provided on a side of the first section (121) remote from the second section (122) in the axial direction of the fixing spring (110).
  7. 7. The mechanical release structure according to claim 2, characterized in that the first section (121) is further provided with a sixth limit ball (1217), the sum of the diameters of the first limit ball (1211) and the sixth limit ball (1217) being equal to the inner diameter of the spring coil body (210), the first limit ball (1211) and the sixth limit ball (1217) forming a limit portion, the anti-unwinding wire (220) being threaded through the limit portion and being confined between the limit portion and the fixed spring (110).
  8. 8. The mechanical release structure according to claim 1, characterized in that the length of the mechanical release structure in the axial direction of the stationary spring (110) ranges from 0.6mm to 1.2mm.
  9. 9. A spring coil system comprising an intracranial spring coil (200), a delivery assembly (300) and a mechanical release structure as recited in any of claims 1-8, wherein the intracranial spring coil (200) comprises a spring coil body (210) and an anti-unwinding wire (220) disposed within the spring coil body (210), the delivery assembly (300) comprises a delivery tube (310) and a release wire (320) threaded through the delivery tube (310), the mechanical release structure comprises a fixed spring (110) and a first section (121) and a second section (122) disposed at opposite ends of the fixed spring (110), the second section (122) is bent to form an annular release region with an end of the fixed spring (110), the fixed spring (110) is retained within the spring coil body (210), the first section (121) is disposed within the spring coil body (210) and is connected to the anti-unwinding wire (220), and the release wire (320) is threaded through the annular release wire and is connected to the delivery tube (310) such that the end of the delivery tube (200) is removably disposed within the delivery tube.
  10. 10. The spring coil system as recited in claim 9, wherein the delivery assembly (300) further includes a restraining spring (330), a communication port (311) is provided in a sidewall of the delivery tube (310), the release wire (320) includes a penetrating segment (321) and a protruding segment (322), the penetrating segment (321) sequentially penetrates through the annular releasing region and the communication port (311), the protruding segment (322) is provided outside the delivery tube (310), and the restraining spring (330) is sleeved on the protruding segment (322) and the delivery tube (310) so that the protruding segment (322) is fixedly bound to the delivery tube (310).
  11. 11. A process for making a mechanical release structure according to any one of claims 1 to 8, comprising: making a platinum tungsten wire with the diameter of 0.03mm-0.05mm into a decyclization (120); Winding a platinum tungsten wire with the diameter of 0.03mm-0.05mm into a fixed spring (110), wherein the inner diameter of the fixed spring is smaller than the outer diameter of the dechucking ring (120), and the length of the fixed spring is 0.2mm-0.6mm; the release ring (120) passes through the fixed spring (110) to form a first section (121) and a second section (122) of which the two ends extend out of the fixed spring (110) respectively, wherein the length of the release ring (120) along the axial direction of the fixed spring (110) ranges from 0.6mm to 1.2mm; A first limit ball (1211) is welded to the first section (121).

Description

Mechanical release structure, manufacturing process thereof and spring ring system Technical Field The invention relates to the technical field of medical equipment, in particular to a mechanical release structure, a manufacturing process thereof and a spring ring system. Background The intracranial spring ring is a common implantation instrument for intracranial aneurysm interventional embolic treatment, and is fed into the pathological change position in the aneurysm during treatment, the aneurysm is stuffed by the spring ring, and blood flow is blocked from entering the aneurysm, so that the treatment aim of preventing the aneurysm from cracking is fulfilled. The spring ring release mode comprises electrolytic release, hot melting release, hydrolytic release, mechanical release and the like. The problems of long release time generally exist in the electrolytic release and thermal melting release modes, the special release device is matched for use, the operation flow is complex, the defect of overlong preparation time before operation exists in the hydrolysis release mode, and the integral duration of clinical operation is easy to increase. The mechanical release mode does not need to rely on a special release instrument, does not need a pre-operation pretreatment waiting process, and is simple and convenient to operate. However, the mechanical release structure realizes spring ring release by pushing the release component out of the microcatheter, so that extra pressure is easily generated on the tumor wall in the pushing release process, the risk of inducing rupture of the aneurysm exists, and the safety and reliability of operation are low. Disclosure of Invention The invention aims to provide a mechanical release structure, a manufacturing process thereof and a spring ring system, which improve the safety and reliability of operation. To achieve the purpose, the invention adopts the following technical scheme: a mechanical release structure for connecting an intracranial spring coil comprising a spring coil body and an anti-unwinding wire disposed in the spring coil body, and a delivery assembly comprising a delivery tube and a release wire disposed through the delivery tube, the mechanical release structure comprising: a fixed spring retained within the spring coil body; The ring-releasing device comprises a fixed spring, a ring-releasing wire and a ring-releasing wire, wherein the ring-releasing wire penetrates through the fixed spring and comprises a first section and a second section which extend out of two ends of the fixed spring respectively; the release wire is arranged in the annular release area in a penetrating way and is detachably connected with the conveying pipe, so that the intracranial spring ring is kept at the distal end of the conveying pipe. In some embodiments, the first section is provided with a first limit ball, and the anti-unwinding wire is threaded through the first section and is limited between the first limit ball and the fixed spring. In some embodiments, the first section is provided with an opening through which the anti-unwinding wire passes to fit around the first section. In some embodiments, the first section is further provided with a second limiting ball and a third limiting ball, the first limiting ball, the second limiting ball and the third limiting ball are sequentially arranged at intervals along the extending direction of the first section, the third limiting ball is abutted to the end part of the fixed spring, an opening is formed between the second limiting ball and the third limiting ball, and the opening is formed in one side, perpendicular to the axis direction of the fixed spring, of the first section. In some embodiments, the first section is further provided with a fourth limiting ball, the fourth limiting ball is abutted to the end portion of the fixed spring, the opening is formed between the first limiting ball and the fourth limiting ball, and the opening is formed in one side, perpendicular to the axis direction of the fixed spring, of the first section. In some embodiments, the first section is further provided with a fifth limiting ball, the opening is arranged between the first limiting ball and the fifth limiting ball, and the opening is arranged on one side of the first section away from the second section along the axial direction of the fixed spring. In some embodiments, the first section is further provided with a sixth limit ball, a sum of diameters of the first limit ball and the sixth limit ball is equal to an inner diameter of the spring ring body, the first limit ball and the sixth limit ball form a limit portion, and the anti-unwinding wire penetrates through the limit portion and is limited between the limit portion and the fixed spring. In some embodiments, the length of the mechanical release structure along the axial direction of the fixed spring ranges from 0.6mm to 1.2mm. The spring ring system comprises an intracranial sp