Locking mechanism and controller applying same

Abstract

The locking mechanism comprises a sliding sleeve, a steel wire through hole is formed in the sliding sleeve, and the steel wire through hole extends in the axial direction of the sliding sleeve and is used for allowing a steel wire to penetrate through; a first positioning piece is installed at the near end of the sliding sleeve, a second positioning piece is installed in the middle of the sliding sleeve, an elastic piece is arranged between the first positioning piece and the second positioning piece and arranged on the sliding sleeve in a sleeving mode, one end of the elastic piece abuts against the first positioning piece, and the other end of the elastic piece abuts against the second positioning piece. The steel wire is locked through the first positioning piece and the second positioning piece, the locking mechanism is simple in structural design and low in component machining difficulty, the cost can be effectively saved, the contact faces of the first positioning piece and the steel wire and the contact faces of the second positioning piece and the steel wire are arc faces, and therefore the steel wire is not prone to falling off. The steel wire is locked through the first positioning piece and the second positioning piece under supporting of the elastic piece, stability is high, and the surface of the steel wire cannot be damaged.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a locking mechanism and a controller using the same. Background Technology

[0002] Endovascular medical procedures allow treatments to be performed at various locations within a patient's body, requiring only relatively small incisions. Endovascular surgery can, for example, eliminate the need for open-heart surgery, reducing the risks, costs, and time associated with it. Endovascular surgery also enables faster recovery times with lower associated costs and complication risks. An example of endovascular surgery that significantly reduces the time and cost of surgery and recovery compared to conventional open surgery is heart valve replacement or repair. An artificial valve is guided to the heart through the patient's vascular system. For example, a catheter is inserted into the patient's vascular system and guided to the inferior vena cava. Force is then applied longitudinally to the catheter, causing it to pass through the inferior vena cava toward the heart. Upon entering the heart from the inferior vena cava, the catheter enters the right atrium. The distal end of the catheter can be deflected using one or more wires located within it. Precise control of the distal end of the catheter allows for more reliable and faster positioning of medical devices and / or implants, as well as other improvements during the procedure.

[0003] Implantable endovascular devices are commonly used in endovascular procedures or the treatment of various vascular diseases, such as cerebral aneurysms. A catheter is inserted into the femoral artery in the patient's leg and guided by imaging within the vessel to the target site of the aneurysm in the brain. With the distal end of the catheter correctly positioned proximally to the aneurysm, a microcatheter is tracked through the catheter to the proximal side of the aneurysm. A delivery and deployment system loaded with the implantable endovascular device is then introduced to the target site via the microcatheter.

[0004] Currently, in intravascular device delivery systems, controllers are generally locked using chucks. However, chucks often become loose. Furthermore, the chucks lock the wire by clamping it onto the wire surface with multiple jaws at the end. This requires high precision in the chuck's manufacturing process, resulting in high manufacturing costs. Over time, the wire surface will wear down, affecting the chuck's lifespan. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a locking mechanism, including a sliding sleeve, wherein a steel wire through hole is provided inside the sliding sleeve, the steel wire through hole extends along the axial direction of the sliding sleeve, and is used for passing a steel wire.

[0006] A first positioning element is installed at the proximal end of the sliding sleeve, and a second positioning element is installed in the middle of the sliding sleeve. An elastic element is provided between the first positioning element and the second positioning element. The elastic element is fitted on the sliding sleeve, with one end of the elastic element abutting against the first positioning element and the other end of the elastic element abutting against the second positioning element. The elastic element provides support for the first positioning element and the second positioning element.

[0007] Preferably, the first positioning member penetrates the sliding sleeve, and the axis of the first positioning member is perpendicular to the axis of the sliding sleeve.

[0008] Preferably, the sliding sleeve has a first positioning hole corresponding to the first positioning member, and the first positioning hole is used to install the first positioning member;

[0009] The first positioning hole extends from one end face of the sliding sleeve to the other end face of the sliding sleeve, and the axis of the first positioning hole is perpendicular to the axis of the sliding sleeve.

[0010] Preferably, the first positioning hole extends radially along the slide sleeve, with the proximal end of the first positioning hole close to the axis of the slide sleeve and the distal end of the first positioning hole gradually moving away from the axis of the slide sleeve.

[0011] Preferably, the second positioning member penetrates the sliding sleeve, and the axis of the second positioning member is perpendicular to the axis of the sliding sleeve.

[0012] Preferably, the sliding sleeve has a second positioning hole corresponding to the second positioning member, and the second positioning hole is used to install the second positioning member;

[0013] The second positioning hole extends from one end face of the sliding sleeve to the other end face of the sliding sleeve, and the axis of the second positioning hole is perpendicular to the axis of the sliding sleeve.

[0014] Preferably, the first positioning hole extends radially along the slide sleeve, with the proximal end of the first positioning hole close to the axis of the slide sleeve and the distal end of the first positioning hole gradually moving away from the axis of the slide sleeve.

[0015] Preferably, the sliding sleeve is further provided with a positioning cavity, which is a hollow cavity. Both ends of the positioning cavity are connected to the through holes of the steel wire, and the positioning cavity is connected to the first positioning hole and the second positioning hole.

[0016] Preferably, the first positioning element includes a screw and a nut. The screw is a semi-threaded screw. The threaded section of the screw extends to the outside of the first positioning hole and then connects to the nut. The smooth section of the first positioning element contacts and compresses the steel wire.

[0017] A controller includes a slide sleeve with an arm positioner knob mounted on the outer side of the slide sleeve. The controller is used in an intravascular device delivery system for delivering intravascular devices.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] 1. In this utility model, the steel wire is locked by the first positioning member and the second positioning member. The locking mechanism has a simple structural design and the parts are easy to process, which can effectively save costs.

[0020] 2. In this locking mechanism, the contact surfaces of the first and second positioning components with the steel wire are both arc surfaces. The steel wire is locked by the first and second positioning components under the support of the elastic component, which has high stability and will not damage the surface of the steel wire. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the locking mechanism provided in the embodiments of this application;

[0022] Figure 2 This is a partial cross-sectional view of the locking mechanism provided in the embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the structure of the first positioning element in the locking mechanism provided in the embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the controller provided in the embodiments of this application.

[0025] In the figure: 1. Sliding sleeve; 11. Wire through hole; 12. Positioning cavity; 13. First positioning hole; 14. Second positioning hole; 2. Arm positioner knob; 3. Wire; 4. First positioning component; 41. Screw; 411. Insertion hole; 42. Nut; 5. Second positioning component; 6. Elastic component. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0027] Please see Figures 1-2 In this embodiment, a locking mechanism is provided, including a sliding sleeve 1. A wire through hole 11 is provided in the sliding sleeve 1. The wire through hole 11 extends along the axial direction of the sliding sleeve 1 and is used to pass through a wire 3. The wire 3 enters the wire through hole 11 from the far end of the sliding sleeve 1 and exits the wire through hole 11 from the near end of the sliding sleeve 1.

[0028] In this embodiment, a first positioning member 4 is installed at the proximal end of the sliding sleeve 1, and a second positioning member 5 is installed at the middle part of the sliding sleeve 1. The first positioning member 4 and the second positioning member 5 have the same structure. An elastic member 6 is provided between the first positioning member 4 and the second positioning member 5. The elastic member 6 is fitted onto the sliding sleeve 1. One end of the elastic member 6 abuts against the first positioning member 4, and the other end of the elastic member 6 abuts against the second positioning member 5. The elastic member 6 provides support for the first positioning member 4 and the second positioning member 5.

[0029] In this embodiment, the first positioning member 4 penetrates through the sliding sleeve 1, and the axis of the first positioning member 4 is perpendicular to the axis of the sliding sleeve 1. The sliding sleeve 1 is provided with a first positioning hole 13 corresponding to the first positioning member 4. The first positioning hole 13 is used to install the first positioning member 4. The first positioning hole 13 extends from one end face of the sliding sleeve 1 to the other end face of the sliding sleeve 1, and the axis of the first positioning hole 13 is perpendicular to the axis of the sliding sleeve 1.

[0030] Specifically, when the first positioning member 4 is installed in the first positioning hole 13, both ends of the first positioning member 4 protrude from the first positioning hole 13, so that the first positioning member 4 can slide along the first positioning hole 13 and the first positioning member 4 will not fall out of the first positioning hole 13.

[0031] Furthermore, the first positioning hole 13 is a U-shaped hole, extending radially along the sliding sleeve 1. The proximal end of the first positioning hole 13 is close to the axis of the sliding sleeve 1, and the distal end of the first positioning hole 13 gradually moves away from the axis of the sliding sleeve 1. When the first positioning member 4 moves from the proximal end to the distal end along the first positioning hole 13, the first positioning member 4 gradually moves away from the axis of the sliding sleeve 1, and the moving direction of the first positioning member 4 has an angle with the axis of the sliding sleeve 1, so that the first positioning member 4 is pressed against the steel wire 3 by the elastic member 6, and the steel wire 3 is axially locked by the friction between the first positioning member 4 and the steel wire 3, so as to prevent the steel wire 3 from axially displacing.

[0032] Furthermore, the second positioning member 5 penetrates through the sliding sleeve 1, and the axis of the second positioning member 5 is perpendicular to the axis of the sliding sleeve 1. The sliding sleeve 1 has a second positioning hole 14 corresponding to the second positioning member 5. The second positioning hole 14 is used to install the second positioning member 5. The second positioning hole 14 extends from one end face of the sliding sleeve 1 to the other end face of the sliding sleeve 1, and the axis of the second positioning hole 14 is perpendicular to the axis of the sliding sleeve 1.

[0033] Specifically, when the second positioning member 5 is installed in the second positioning hole 14, both ends of the second positioning member 5 protrude from the second positioning hole 14, so that the second positioning member 5 can slide along the first positioning hole 13, and the second positioning member 5 will not fall out of the second positioning hole 14.

[0034] Furthermore, the second positioning hole 14 is a U-shaped hole, extending radially along the sliding sleeve 1. The distal end of the second positioning hole 14 is close to the axis of the sliding sleeve 1, while the proximal end of the second positioning hole 14 gradually moves away from the axis of the sliding sleeve 1. When the second positioning member 5 moves from the proximal end to the distal end along the second positioning hole 14, the second positioning member 5 gradually approaches the axis of the sliding sleeve 1, and the moving direction of the second positioning member 5 has an angle with the axis of the sliding sleeve 1. This allows the second positioning member 5 to compress the steel wire 3 under the support of the elastic member 6, thereby axially locking the steel wire 3 through the friction between the second positioning member 5 and the steel wire 3, preventing the steel wire 3 from undergoing axial displacement.

[0035] Furthermore, a positioning cavity 12 is also provided inside the sliding sleeve 1. The positioning cavity 12 is a hollow cavity. Both ends of the positioning cavity 12 are connected to the wire through hole 11. The diameter of the positioning cavity 12 is larger than the diameter of the wire through hole 11. The positioning cavity 12 is connected to the first positioning hole 13 and the second positioning hole 14.

[0036] Specifically, the steel wire 3 passes through the steel wire through hole 11 and the positioning cavity 12. Under the elastic force of the elastic element 6, the first positioning element 4 and the second positioning element 5 squeeze the steel wire 3. The steel wire 3 is slightly bent due to the squeezing of the first positioning element 4 and the second positioning element 5. The first positioning element 4 and the second positioning element 5 lock the steel wire 3 axially to prevent the steel wire 3 from displacing axially. The locking mechanism has a simple structural design and the parts are easy to process, which can effectively save costs.

[0037] In this embodiment, the elastic element 6 includes, but is not limited to, a metal spring, or other elastic structures mounted on the sliding sleeve 1 to support the first positioning element 4 and the second positioning element 5.

[0038] See Figure 3 As shown, the first positioning member 4 includes a screw 41 and a nut 42. The screw 41 is a semi-threaded screw. The threaded section of the screw 41 extends to the outside of the first positioning hole 13 and then connects to the nut 42. The smooth section of the first positioning member 4 contacts and compresses the steel wire 3.

[0039] The contact surfaces of the first positioning element 4 and the second positioning element 5 with the steel wire 3 are both arc surfaces. The steel wire 3 is locked by the first positioning element 4 and the second positioning element 5 under the support of the elastic element 6, which has high stability and will not damage the surface of the steel wire.

[0040] Furthermore, the end of the screw 41 away from the toothed section is provided with an insertion hole 411. The diameter of the insertion hole 411 is larger than the diameter of the metal spring cross section, so that the end of the metal spring can be inserted into the insertion hole 411. The first positioning member 4 and the second positioning member 5 limit the metal spring radially, which can improve the stability of the metal spring along the axial extension and contraction. At the same time, the end of the metal spring is respectively accommodated in the first positioning member 4 and the second positioning member 5, so as to avoid the doctor being scratched by the end of the metal spring when operating the locking mechanism.

[0041] See Figure 4 As shown, this embodiment provides a controller, which includes a sliding sleeve 1. An arm positioner knob 2 is fitted on the outside of the sliding sleeve 1. The arm positioner knob 2 is used to manipulate the arm position of the monk's cap flap repair device. This structure is prior art and will not be described in detail here.

[0042] The controller is used in an intravascular device delivery system to deliver intravascular devices. The controller is connected to the proximal end of an elongated mandrel, and the intravascular device is connected to the distal end of the elongated mandrel. The elongated mandrel is connected to the intravascular device via an internal or external thread connection. The intravascular device may include a mitral valve repair device or a vascular repair device. The elongated mandrel passes through the controller, which can be fixed to the proximal end of the elongated mandrel. When the intravascular device is delivered into the patient's body, the controller is operated to rotate the elongated mandrel, causing the elongated mandrel to separate from the intravascular device, and then the elongated mandrel is removed.

[0043] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A locking mechanism comprising a sliding sleeve (1) having a wire through hole (11) extending axially along the sliding sleeve (1) for passing a wire (3), characterized in that, A first positioning element (4) is installed at the proximal end of the sliding sleeve (1), and a second positioning element (5) is installed at the middle part of the sliding sleeve (1). An elastic element (6) is provided between the first positioning element (4) and the second positioning element (5), and the elastic element (6) is fitted onto the sliding sleeve (1). One end of the elastic element (6) abuts against the first positioning element (4), and the other end of the elastic element (6) abuts against the second positioning element (5). The elastic element (6) provides support for the first positioning element (4) and the second positioning element (5).

2. The locking mechanism according to claim 1, characterized in that, The first positioning element (4) penetrates the sliding sleeve (1), and the axis of the first positioning element (4) is perpendicular to the axis of the sliding sleeve (1).

3. A locking mechanism according to claim 2, characterized in that, The sliding sleeve (1) has a first positioning hole (13) corresponding to the first positioning member (4), and the first positioning hole (13) is used to install the first positioning member (4). The first positioning hole (13) extends from one end face of the sliding sleeve (1) to the other end face of the sliding sleeve (1), and the axis of the first positioning hole (13) is perpendicular to the axis of the sliding sleeve (1).

4. A locking mechanism according to claim 3, characterized in that, The first positioning hole (13) extends radially along the sleeve (1), and the proximal end of the first positioning hole (13) is close to the axis of the sleeve (1), while the distal end of the first positioning hole (13) gradually moves away from the axis of the sleeve (1).

5. A locking mechanism according to claim 1, characterized in that, The second positioning element (5) passes through the sliding sleeve (1), and the axis of the second positioning element (5) is perpendicular to the axis of the sliding sleeve (1).

6. A locking mechanism according to claim 3, characterized in that, The sliding sleeve (1) has a second positioning hole (14) corresponding to the second positioning member (5), and the second positioning hole (14) is used to install the second positioning member (5). The second positioning hole (14) extends from one end face of the sliding sleeve (1) to the other end face of the sliding sleeve (1), and the axis of the second positioning hole (14) is perpendicular to the axis of the sliding sleeve (1).

7. A locking mechanism according to claim 6, characterized in that, The first positioning hole (13) extends radially along the sleeve (1), and the proximal end of the first positioning hole (13) is close to the axis of the sleeve (1), while the distal end of the first positioning hole (13) gradually moves away from the axis of the sleeve (1).

8. A locking mechanism according to claim 6, characterized in that, The sliding sleeve (1) is also provided with a positioning cavity (12). The positioning cavity (12) is a hollow cavity. Both ends of the positioning cavity (12) are connected to the wire through hole (11). The positioning cavity (12) is connected to the first positioning hole (13) and the second positioning hole (14).

9. A locking mechanism according to claim 1, characterized in that, The first positioning element (4) includes a screw (41) and a nut (42). The screw (41) is a semi-threaded screw. The threaded section of the screw (41) extends to the outside of the first positioning hole (13) and then connects to the nut (42). The smooth section of the first positioning element (4) contacts and squeezes the steel wire (3).

10. A controller comprising the locking mechanism according to any one of claims 1-9, characterized in that, The outer side of the sliding sleeve (1) is fitted with an arm positioner knob (2), and the controller is applied to the intravascular device delivery system for delivering intravascular devices.

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