CN118236111A - Spring coil pushing device and spring coil system - Google Patents
Spring coil pushing device and spring coil system Download PDFInfo
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- CN118236111A CN118236111A CN202410683200.5A CN202410683200A CN118236111A CN 118236111 A CN118236111 A CN 118236111A CN 202410683200 A CN202410683200 A CN 202410683200A CN 118236111 A CN118236111 A CN 118236111A
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- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 210000004204 blood vessel Anatomy 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 26
- 206010002329 Aneurysm Diseases 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 230000002792 vascular Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003073 embolic effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12027—Type of occlusion
- A61B17/12031—Type of occlusion complete occlusion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/1214—Coils or wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Reproductive Health (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurosurgery (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a spring ring pushing device and a spring ring system, wherein the spring ring pushing device comprises a pushing tube with a hollow cavity inside, a notch is arranged on the circumference of the pushing tube near the far end of the pushing tube, an elastic tube is arranged in the notch, the elastic tube is embedded into the pushing tube and is communicated with the hollow cavity, part of the elastic tube is exposed out of the notch, a sleeve is arranged outside the notch, and the sleeve is wrapped outside the pushing tube and covers the notch and the exposed elastic tube, so that stable support is provided for the elastic tube, the structural strength of the elastic tube in the using process is ensured, and the elastic characteristic of the elastic tube is not influenced. Therefore, the invention not only maintains the flexibility required by the distal end of the pushing tube, so that the whole pushing device can flexibly adapt to the complex path of the blood vessel, but also maintains the stability and the firmness of the structure.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a spring ring pushing device and a spring ring system.
Background
The spring ring is used as an implanted medical device and is commonly used for treating the aneurysm in the cranium or other parts, the spring ring is accurately delivered into the aneurysm through a minimally invasive operation, and the tumor cavity is filled by means of the shape memory and expansion characteristics of the spring ring, so that the blood flow in the aneurysm is blocked, and the risk of rupture of the aneurysm is effectively prevented. In clinical practice, the technology of conveying and releasing the spring ring is important, and the success rate and the safety of the operation are directly related.
Chinese patent CN215384340U discloses a releasable embolic coil system, the pushing device of which adopts a hollow tubular pushing rod design, and the release mechanism is integrated at the distal end of the pushing rod. However, due to the tortuosity of the vascular structure of the human body, when the original pushing rod encounters vascular bending, the trafficability in the tortuosity vascular is low due to the fact that the distal end of the pushing rod is hard and strong in rigidity and insufficient in flexibility, and the conduction performance of the control force from the proximal end to the distal end of the pushing rod is poor, so that the factors form challenges for operation precision and safety.
In order to solve the above technical problems, the chinese patent CN110974332a proposes an improved mechanical release spring coil system, and mainly improves the structural design of the pushing device. The elastic tube is additionally arranged at the distal end of the pushing rod, so that the flexibility of the distal end is increased, the device is suitable for a complex vascular path, and the trafficability in the operation process is improved. Nevertheless, the introduction of the design of the elastic tube presents new problems, which may lead to a decrease in the overall stiffness of the push rod, especially in the distal region, which is more prone to breakage, thus increasing the risk of the surgical procedure. Accordingly, there is a need in the subsequent research and development to find an optimal balance between maintaining the flexibility of the push rod and ensuring its structural stability to further optimize the safety and effectiveness of the coil push device.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a spring ring pushing device and a spring ring system.
According to the invention, there is provided a spring coil pushing device comprising a pushing tube having a hollow cavity therein, a slit being provided on the circumference of the pushing tube near the distal end thereof, an elastic tube being provided in the slit, the elastic tube being embedded into the pushing tube and communicating with the hollow cavity and partially exposing the slit, a sleeve being provided outside the slit, the sleeve being wrapped outside the pushing tube and covering the slit and the exposed elastic tube.
Further, in any cross section of the elastic tube, the total length of the elastic tube is L, and the length of the elastic tube contacted with the pushing tube is L1, wherein L1/L is more than or equal to 1/6 and less than or equal to 1/2.
Further, the proximal end of the elastic tube is attached to the proximal end of the incision, and the distal end of the elastic tube is attached to the distal end of the incision.
Further, the proximal end of the incision is a chamfer, the proximal end of the elastic tube is in a straight cylinder shape, and a space is reserved between the end face of the proximal end of the elastic tube and the proximal end of the chamfer of the incision, so that the proximal end of the elastic tube at least does not completely cover the chamfer.
Further, the chamfer surface is a V-shaped chamfer surface.
Further, the proximal end of the incision is a chamfer, and the proximal end of the elastic tube is cone-shaped and covers the chamfer.
Further, the distal end of the incision is a straight cut surface, and the distal end of the elastic tube is a straight cylinder and covers the straight cut surface.
Further, the elastic tube comprises at least two sub-elastic tubes, and two adjacent sub-elastic tubes are arranged at intervals.
Further, a separation ring is arranged at the notch and separates two adjacent sub elastic tubes.
According to the invention, there is also provided a spring coil system comprising a trip core wire, a trip head, a spring coil and the spring coil pushing device, wherein the side wall of the distal end of the pushing tube is provided with a positioning groove communicated with the hollow cavity, the trip core wire passes through the inside of the elastic tube and then extends to the distal end of the hollow cavity, and the trip head is extruded to be abutted into the positioning groove, so that the trip head is matched with the positioning groove to be limited in the hollow cavity, and the spring coil is connected with the trip head and is positioned outside the hollow cavity.
Compared with the prior art, the invention designs the incision for supporting the elastic tube on the circumference of the distal end of the pushing tube, and adopts the sleeve to skillfully cover the incision and the elastic tube part exposed above the incision, thus the design not only provides stable support for the elastic tube so as to ensure the structural strength of the elastic tube in the use process, but also does not influence the elastic property of the elastic tube. Therefore, the invention not only maintains the flexibility required by the distal end of the pushing tube, so that the whole pushing device can flexibly adapt to the complex path of the blood vessel, but also maintains the stability and the firmness of the structure.
Drawings
The invention will be more fully understood and its attendant advantages and features will be more readily understood by reference to the following detailed description, taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of a spring coil pushing device according to an embodiment of the present invention.
Fig. 2 is an enlarged view at a in fig. 1.
FIG. 3 is a cross-sectional view at B-B in FIG. 1.
FIG. 4 is a schematic diagram of a spring coil system according to an embodiment of the invention.
Fig. 5 is a schematic structural view of an elastic tube and a core-releasing wire in a second embodiment of the present invention.
Fig. 6 is a schematic structural view of an elastic tube in a third embodiment of the present invention.
Fig. 7 is a schematic view of the structure of an elastic tube and a core-releasing wire in the fourth embodiment of the present invention.
In the accompanying drawings: 1 is a push pipe, 2 is a notch, 3 is an elastic pipe, 4 is a sleeve, 5 is a separation ring, 6 is a release core wire, 7 is a release head, 8 is a spring ring, 9 is a positioning groove, 10 is an annular limiting groove, 11 is an action protrusion, 12 is a supporting ring, and 13 is an action groove.
It should be noted that the drawings are for illustrating the invention and are not to be construed as limiting the invention. Note that the drawings representing structures may not be drawn to scale. Also, in the drawings, the same or similar elements are denoted by the same or similar reference numerals.
Detailed Description
In order that the invention may be more readily understood, a detailed description of the invention is provided below along with specific embodiments and accompanying figures.
The terms "proximal" and "distal" in the sense of the present invention should be understood as meaning, viewed from the direction of the attending physician, the term "proximal" referring to the end proximal to the attending physician, i.e. corresponding to the "left end" referred to with reference to the accompanying drawings, and the term "distal" referring to the end distal to the attending physician, i.e. corresponding to the "right end" referred to with reference to the accompanying drawings. Similarly, "proximal segment" refers to a segment or a particular region proximal to the attending physician, and "distal segment" refers to a segment or a particular region distal to the attending physician.
Embodiment one: the coil pushing device of this embodiment is a medical device for delivering coils into the interior of an aneurysm. The spring coil pushing device is structured as shown in fig. 1 to 3, and comprises a pushing tube 1 with a hollow cavity inside, wherein the pushing tube 1 is an elongated pipeline, and aims to ensure that the spring coil can safely and accurately reach a target position and reduce damage to tissues around blood vessels.
The pushing tube 1 is provided with a notch 2 near the distal end, namely the circumference of the distal end section, an elastic tube 3 is arranged in the notch 2, the elastic tube 3 is embedded into the pushing tube 1 and communicated with the hollow cavity, and part of the notch 2 is exposed out, a sleeve 4 is arranged outside the notch 2, and the sleeve 4 is wrapped outside the pushing tube 1 and covers the notch 2 and the exposed elastic tube 3. In this embodiment, the incision 2 is adopted to support the elastic tube 3 locally, and the sleeve 4 is adopted to cover the incision 2 and the elastic tube 3 exposed above the incision 2, so that the design not only provides stable support for the elastic tube 3 to ensure the structural strength of the elastic tube 3 in the use process, but also does not influence the elastic characteristic of the elastic tube 3, therefore, the embodiment not only maintains the flexibility required by the distal section of the push tube 1, so that the whole push device can flexibly adapt to the complex path of the blood vessel, but also maintains the stability and the firmness of the structure.
The elastic tube 3 is a spring tube, which has better flexibility to adapt to the complex path and dynamic environment of the blood vessel, generally refers to a tubular structure with special shape memory property, and is mainly made of materials with excellent biocompatibility, such as stainless steel, nickel-titanium alloy or materials coated with special coatings, so as to adapt to the specific requirements in medical implantation or interventional operation. In any cross section of the elastic tube 3, the total length of the elastic tube 3 is L, the length of the elastic tube 3 contacted with the pushing tube 1 is L1, and 1/6-L1/L-1/2 is satisfied, so that the supporting of the corresponding pushing tube 1 at the notch 2 to the elastic tube 3 is ensured to be a local supporting. Here, referring to fig. 3, L is the circumference of the cross section of the elastic tube 3, and L1 is the arc length of the elastic tube 3 in contact with the push tube 1. This ratio ensures that the support of the elastic tube 3 by the push tube 1 in the vicinity of the incision 2 is neither excessive nor insufficient, just to maintain the flexibility of the distal end. In particular, in this embodiment, L1/L takes a value of 1/6, which aims to achieve minimum intervention on the elastic tube 3 and maximally release the inherent elastic potential thereof, so that the distal section of the push tube 1 has higher flexibility and is convenient to shuttle in tortuous vessels. Of course, this ratio is not fixed and can be adjusted to 1/5, 1/4, 1/3 or 1/2 depending on the specific requirements, as long as 1/6.ltoreq.L1/L.ltoreq.1/2 is satisfied. If L1/L is less than 1/6, the support provided by the push tube 1 to the flexible tube 3 will appear insufficient, resulting in excessive distal softness, affecting the stability and accuracy of the surgical procedure. Conversely, if L1/L exceeds 1/2, the distal end of the push tube 1 may lose the necessary flexibility due to excessive rigidity, which is also disadvantageous for smooth operation. Thus, careful control of this ratio is critical to ensure that the coil pushing device is flexible enough to accommodate the vascular structure while maintaining operational stability.
The elastic tube 3 is matched with the incision 2, namely, the proximal end of the elastic tube 3 is jointed with the proximal end of the incision 2, and the distal end of the elastic tube 3 is jointed with the distal end of the incision 2. The proximal end of the incision 2 is a chamfer, the chamfer is approximately a V-shaped chamfer, the proximal end of the elastic tube 3 is in a straight cylinder shape, and a space is provided between the end face of the proximal end of the elastic tube 3 and the proximal end of the chamfer of the incision 2, so that the proximal end of the elastic tube 3 at least does not completely cover the chamfer, thereby further improving the flexibility of the distal end section of the push tube 1. The distal end of the incision 2 is a straight cut surface, and the distal end of the elastic tube 3 is a straight cylinder shape and covers the straight cut surface, so as to ensure that the control force to the pushing tube 1 can be smoothly transferred to the distal end of the pushing tube 1. Of course, the proximal end of the elastic tube 3 may also be tapered and cover the chamfer, so that the diameter-changing section of the elastic tube 3 can just fit completely with the chamfer.
The elastic tube 3 comprises at least two sub-elastic tubes, the adjacent two sub-elastic tubes are arranged at intervals, a separation ring 5 is arranged at the notch 2, and the separation ring 5 separates the adjacent two sub-elastic tubes. In this embodiment, the number of the sub elastic tubes is three, the number of the separating rings 5 is two, the sub elastic tubes between the two separating rings 5 have the shortest length and have a developing function, the elastic tubes 3 are arranged to be at least two sub elastic tubes, and the sub elastic tubes are separated by the separating rings 5 and are independent of each other, so that the overall flexibility of the elastic tubes 3 is improved, and meanwhile, the strength of the notch 2 is also increased, so that the flexibility and the rigidity of the distal end section of the push tube 1 are balanced.
The embodiment also provides a spring coil system using the spring coil pushing device, and the structure of the spring coil system comprises a release core wire 6, a release head 7, a spring coil 8 and the spring coil pushing device. The distal end lateral wall of push tube 1 is provided with the constant head tank 9 of intercommunication cavity, and release head 7 is globular and the diameter is greater than the width of constant head tank 9, and release core silk 6 stretches to the distal end of cavity after passing inside elastic tube 3 from the proximal end of cavity to extrude release head 7 makes it support into constant head tank 9, in release head 7 part card was gone into constant head tank 9 like this, guaranteed release head 7 and constant head tank 9 cooperatees in order to be restricted in cavity to form the spacing to spring coil 8, spring coil 8 is connected and is located the cavity outside with release head 7.
In the operation process, a doctor delivers the spring ring 8 to the position of the aneurysm through the push tube 1, when the spring ring 8 reaches a preset position, the doctor slowly withdraws the release core wire 6 immediately, so that the release head 7 is separated from the positioning groove 9, release and unfolding of the released spring ring 8 in the aneurysm are realized, a stable embolism structure is formed, blood flow is blocked from entering the aneurysm, rupture risk is reduced, thrombosis is promoted, and finally the purpose of treating the aneurysm is achieved.
Embodiment two: unlike the first embodiment, as shown in fig. 5, a part of the elastic tube 3 of the spring coil system of the embodiment is recessed inwards to form an annular limit groove 10, and the release core wire 6 is provided with an action protrusion 11 with a size larger than that of the annular limit groove 10, and the annular limit groove 10 can be opened when the action protrusion 11 extrudes the annular limit groove 10. Like this, the action protruding 11 has formed limit structure with annular spacing groove 10, can prevent the maloperation and draw off in advance and break away core silk 6 to a certain extent, just need increase initial effort moreover, just can prop up annular spacing groove 10 through the action protruding 11, have not influence to follow-up operation action, do not increase the operation degree of difficulty.
The annular limiting groove 10 is formed into a shape with two large ends and a small middle, and correspondingly, the action protrusion 11 is designed into a shape with two small ends and a large middle, for example, the longitudinal section of the action protrusion 11 is elliptical, and the complementation of the two forms ensures that the action protrusion 11 can be accurately embedded into and effectively spread the annular limiting groove 10 in the pressing process so as to pass through the annular limiting groove 10, and meanwhile, the design also ensures that after the necessary force is applied for the first time, the subsequent operation is not hindered, and the smoothness and the high efficiency of the operation process are maintained.
Other structures of this embodiment are identical to those of the embodiment, and are not described herein.
Embodiment III: unlike the second embodiment, as shown in fig. 6, the supporting ring 12 is disposed between the elastic tube 3 and the sleeve 4, the supporting ring 12 is disposed corresponding to the annular limiting groove 10 to support the annular limiting groove 10, the outer wall of the supporting ring 12 is in a standard cylindrical shape, and the inner wall is designed into a special shape with two large ends and a small middle, so that the structural stability and the molding quality of the annular limiting groove 10 are ensured, and the annular limiting groove 10 is effectively prevented from being deformed unexpectedly too early or too fast due to stress, thereby avoiding the situation that the action protrusion 11 easily passes through the annular limiting groove 10.
Other structures of this embodiment are the same as those of the second embodiment, and will not be described here again.
Embodiment four: unlike the second embodiment, as shown in fig. 7, the action protrusion 11 of the present embodiment is formed in a shape with both ends large and middle small, the middle of the action protrusion 11 is formed with the action groove 13 coupled with the annular limit groove 10, the longitudinal section of the action protrusion 11 is concave-shaped to form the annular limit groove 10, and the annular limit groove 10 is not spread by the action protrusion 11 when the action groove 13 is coupled with the annular limit groove 10. That is, when the acting groove 13 is mated with the annular limiting groove 10, the annular limiting groove 10 is restored to an undeployed state, i.e., is maintained as it is, because the both ends of the acting protrusion 11 are disposed right on the opposite sides of the annular limiting groove 10. Before the operation, the action protrusion 11 is located in the distal direction of the annular limiting groove 10, and when the release wire 6 is operated to release the spring ring 8, the proximal end of the action protrusion 11 applies pressure to the annular limiting groove 10 and then passes through the annular limiting groove 10. At this time, the proximal and distal ends of the action projections 11 are positioned just on both sides of the annular limiting groove 10, forming a fitted state of the action groove 13 and the annular limiting groove 10. However, this is not enough, and it is necessary to let the distal end of the action protrusion 11 also apply pressure to the annular limiting groove 10 and pass through the annular limiting groove 10, so that the operation of releasing the core wire 6 is actually completed.
Thus, this embodiment greatly improves the ability to prevent operational errors by such double-layer engagement of the proximal and distal ends of the action projections 11 with the annular limiting groove 10, ensuring the safety and precise control of the spring ring 8 release process.
Other structures of this embodiment are the same as those of the second embodiment, and will not be described here again. Of course, it is also possible to still maintain the shape of the action protrusion 11 with both small ends and large middle in the second embodiment, and to provide the action groove 13 in the middle of the action protrusion 11, and similar technical effects can be achieved.
It will be appreciated that although the invention has been described above in terms of preferred embodiments, the above embodiments are not intended to limit the invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a spring coil pusher, includes push tube (1) that inside has cavity, its characterized in that, push tube (1) is close to being equipped with incision (2) on the circumference of its distal end department, is equipped with elastic tube (3) in incision (2), and inside and with cavity intercommunication and part exposing incision (2) of push tube (1) of elastic tube (3) embedding, sleeve pipe (4) are outside incision (2), and sleeve pipe (4) parcel just covers incision (2) and outside elastic tube (3) of exposing outside push tube (1).
2. Spring coil pushing device according to claim 1, characterized in that in any cross section of the elastic tube (3), the elastic tube (3) has an overall length L, the elastic tube (3) in contact with the pushing tube (1) has a length L1, 1/6.ltoreq.l1/l.ltoreq.1/2.
3. The coil pushing device according to claim 1, wherein the proximal end of the elastic tube (3) is arranged in abutment with the proximal end of the slit (2), and the distal end of the elastic tube (3) is arranged in abutment with the distal end of the slit (2).
4. A coil pushing device according to claim 3, characterized in that the proximal end of the slit (2) is a chamfer, the proximal end of the elastic tube (3) is straight, and a distance is provided between the end surface of the proximal end of the elastic tube (3) and the proximal end of the chamfer of the slit (2) such that the proximal end of the elastic tube (3) does not at least completely cover the chamfer.
5. The coil spring pusher of claim 4, wherein said chamfer is a V-shaped chamfer.
6. A coil pushing device according to claim 3, characterized in that the proximal end of the slit (2) is beveled, the proximal end of the elastic tube (3) being cone-shaped and covering the beveled.
7. A coil pushing device according to claim 3, characterized in that the distal end of the slit (2) is a straight cut surface and the distal end of the elastic tube (3) is a straight cylinder and covers the straight cut surface.
8. The spring coil pushing device according to claim 1, characterized in that the elastic tube (3) comprises at least two sub-elastic tubes, which are arranged at a distance from each other.
9. Spring coil pushing arrangement according to claim 8, characterized in that a spacer ring (5) is provided at the cutout (2), the spacer ring (5) separating adjacent two sub-elastic tubes.
10. A spring coil system, characterized by comprising a release core wire (6), a release head (7), a spring coil (8) and a spring coil pushing device as claimed in any one of claims 1 to 9, wherein a positioning groove (9) communicated with a hollow cavity is formed in the side wall of the distal end of the pushing tube (1), the release core wire (6) penetrates through the inside of the elastic tube (3) and extends to the distal end of the hollow cavity, and the release head (7) is extruded to abut against the positioning groove (9), so that the release head (7) is matched with the positioning groove (9) to be limited in the hollow cavity, and the spring coil (8) is connected with the release head (7) and is located outside the hollow cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410683200.5A CN118236111B (en) | 2024-05-30 | 2024-05-30 | Spring coil pushing device and spring coil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410683200.5A CN118236111B (en) | 2024-05-30 | 2024-05-30 | Spring coil pushing device and spring coil system |
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| CN118236111A true CN118236111A (en) | 2024-06-25 |
| CN118236111B CN118236111B (en) | 2024-07-30 |
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| CN202410683200.5A Active CN118236111B (en) | 2024-05-30 | 2024-05-30 | Spring coil pushing device and spring coil system |
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2024
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| CN118236111B (en) | 2024-07-30 |
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