A vascular suture device

Abstract

This invention provides a vascular suturing device, belonging to the field of medical device technology. The vascular suturing device includes: a housing; a piston with a rigid needle disposed thereon, driven to move forward or backward toward a sheath to complete the vascular suturing operation; and a piston limiting mechanism for restricting the piston from moving towards a proximal position away from the sheath. The piston limiting mechanism effectively solves the problem of existing vascular suturing devices lacking limiting and directional guidance.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a vascular suture device. Background Technology

[0002] In the field of vascular suturing, a rigid needle is typically used to puncture the blood vessel to pass the suture through the vessel wall for suturing, and then the rigid needle is withdrawn and separated from the suture. However, because the order of operations during puncture and withdrawal is crucial to the successful suturing, medical staff must first puncture the rigid needle and then withdraw it after the suture is joined. Incorrect operation sequence can lead to premature separation of the rigid needle and suture, preventing the suture from passing through the blood vessel for suturing, thus causing surgical failure.

[0003] The main reasons for the aforementioned operational sequence errors are as follows: First, the operation of a vascular suture device involves numerous steps, divided into four main steps. The learning curve for medical staff using vascular suture devices is relatively long, with many limitations and usage guidelines within these four main steps. Furthermore, the steps of firing, withdrawing the rigid needle, and suturing are closely adjacent in actual use. Therefore, errors frequently occur among medical staff, such as prematurely withdrawing the rigid needle, leading to unnecessary waste of the instrument. Additionally, in the design of existing vascular suture devices, the forward and backward movement of the rigid needle occurs within a rectangular channel. The vascular suture device lacks limiting and directional guidance, failing to ensure that the rigid needle can be withdrawn only after the puncture and suturing are completed. This creates a safety hazard due to operational errors by medical staff. Summary of the Invention

[0004] Therefore, this invention provides a vascular suturing device. To address the problem that existing vascular suture devices lack positioning and directional guidance, making it impossible to guarantee the successful insertion of the rigid needle and the completion of the suture before its withdrawal, thus leading to safety hazards and operational errors by healthcare workers, this invention provides a vascular suturing device comprising:

[0005] outer shell;

[0006] A piston, on which a rigid needle is mounted, is driven to move forward or backward toward the sheath to complete the vascular suturing.

[0007] A piston limiting mechanism is used to restrict the piston from moving towards a proximal position away from the sheath.

[0008] Optionally, the piston limiting mechanism includes: an undercut component and a limiting card interface disposed opposite to the undercut component;

[0009] The inverted component is provided with a limiting engagement part, which is used to restrict the piston from moving toward a position away from the proximal end of the sheath.

[0010] The inverted component is also provided with an unlocking sliding part. During the process of the piston moving towards the sheath tube under drive, the inverted component or the limiting card interface undergoes yielding deformation or breakage, so that one of the inverted component and the limiting card interface gives way. After the inverted component or the limiting card interface undergoes yielding deformation or breakage, the piston limiting mechanism fails during the process of the piston moving towards the proximal position.

[0011] Optionally, the outer casing includes: an upper casing and a lower casing; the undercut component is disposed on the upper casing, and the limiting clip interface is disposed on the piston; or,

[0012] The outer casing includes an upper casing and a lower casing; the buckle component is disposed on the lower casing, and the limiting card interface is disposed on the piston.

[0013] Optionally, it also includes: a connector disposed within the housing for drivingly connecting the sheath and the piston;

[0014] The inverted component is disposed on the connector, and the limiting card interface is disposed on the piston.

[0015] Optionally, the limiting engagement part is a right-angle engaging limiting surface;

[0016] The unlocking sliding part is an arc-shaped transition guide surface.

[0017] Optionally, the limiting latching part and the unlocking sliding part are disposed on the wedge-shaped trigger structure of the inverted component, and the wedge-shaped trigger structure is disposed on the connecting rod side of the inverted component.

[0018] Optionally, the piston limiting mechanism includes: a limiting pin disposed on the outer casing, and a limiting hole disposed on the piston and disposed opposite to the limiting pin;

[0019] The limiting pin is provided with a pin guide slope; as the piston is driven to move toward the sheath, the limiting pin slides away from the limiting hole under the action of the piston, so that the limiting pin is displaced and the piston limiting mechanism is disabled.

[0020] The limiting pin is provided with a limiting vertical surface, and the side of the limiting hole facing the limiting vertical surface is a vertical surface adapted to it; the limiting vertical surface abuts against the limiting hole, restricting the piston from moving toward the proximal position.

[0021] Optionally, the piston is provided with a pin guide slope that matches the shape of the pin guide slope of the limiting pin.

[0022] Optionally, the piston limiting mechanism includes: a limiting pin disposed on the outer casing, and a limiting hole disposed on the piston and disposed opposite to the limiting pin;

[0023] The limiting insertion hole is provided with a hole guide slope; as the piston is driven to move forward toward the sheath, the limiting pin slides away from the limiting insertion hole under the action of the piston, so that the limiting pin is displaced and the piston limiting mechanism is disabled.

[0024] The limiting pin is provided with a limiting vertical surface, and the side of the limiting hole facing the limiting vertical surface is a vertical surface adapted to it; the limiting vertical surface abuts against the limiting hole, restricting the piston from moving toward the proximal position.

[0025] Optionally, the limiting pin is inserted and fixed to the outer casing; or,

[0026] The limiting pin is fixed to the outer shell by integral molding.

[0027] Optionally, a limiting protrusion is provided on one of the limiting pin and the outer shell, and a slot adapted to the limiting protrusion is provided on the other of the limiting pin and the outer shell.

[0028] The limiting pin is engaged and fixed to the outer shell by the limiting protrusion and the slot to prevent the limiting pin from shifting and reconnecting to the limiting hole after the piston limiting mechanism fails.

[0029] Optionally, there are at least two sets of limiting protrusions, which are located at different positions along the length of the limiting pin; the number of slots is adapted to the number of limiting protrusions.

[0030] Optionally, the piston limiting mechanism includes: magnetic limiting components respectively disposed on the outer casing and the piston;

[0031] The magnetic limiting component is used to restrict the piston from moving toward the proximal position.

[0032] Optionally, the magnetic limiting component includes: a first magnetic element disposed on the outer casing, and a second magnetic element and a third magnetic element respectively disposed on the piston;

[0033] The second magnetic element has the opposite magnetic properties to the first magnetic element, and the second magnetic element is disposed at the proximal end position so that the piston is driven to move toward the direction of the sheath.

[0034] The third magnetic element has the same magnetism as the first magnetic element, and the third magnetic element is located at a distal position to prevent the piston from being driven to move away from the sheath.

[0035] Optionally, the undercut component has an L-shaped structure.

[0036] The technical solution of this invention has the following advantages:

[0037] The vascular suture device provided by this invention has a limiting structure, enabling it to prevent mistaken insertion and suturing, ensuring that the rigid needle can only be withdrawn after the insertion and suturing are completed. This structure effectively prevents medical staff from making operational errors during the numerous steps, avoiding premature needle withdrawal and unnecessary waste of instruments. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is an explosion diagram of the vascular suture device provided in an embodiment of the present invention;

[0040] Figure 2 An enlarged schematic diagram of the structure of the undercut component provided in this embodiment of the invention, in which the limiting snap-fit ​​part abuts against the limiting snap-fit ​​interface to restrict the piston from moving toward the proximal position;

[0041] Figure 3 An enlarged schematic diagram of the structure in which the unlocking sliding part of the inverted component provided in the embodiment of the present invention is slidably connected to the limiting card interface, causing the piston limiting mechanism to fail;

[0042] Figure 4 This is a three-dimensional structural diagram of the inverted component provided in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram of the piston limiting mechanism with an L-shaped inverted structure installed in the upper housing, as provided in an embodiment of the present invention.

[0044] Figure 6 This is a schematic diagram of the piston limiting mechanism with an L-shaped inverted structure disposed in the lower housing, as provided in an embodiment of the present invention.

[0045] Figure 7A schematic diagram of the piston limiting mechanism structure provided in the connector with the L-shaped undercut structure according to an embodiment of the present invention;

[0046] Figure 8 This is a schematic diagram of the undercut component in a yielded state according to an embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of the undercut component in its normal state according to an embodiment of the present invention;

[0048] Figure 10 An enlarged schematic diagram of the structure provided in this embodiment of the invention, in which the limiting pin snapped onto the lower housing disengages from the limiting insertion hole, causing the piston limiting mechanism to fail.

[0049] Figure 11 An enlarged schematic diagram of the structure provided in this embodiment of the invention, in which a limiting pin snaps onto the lower housing and abuts against a limiting hole to restrict the piston from moving toward the proximal position;

[0050] Figure 12 An enlarged schematic diagram of the limiting pin fixed to the lower housing in an integral molding manner according to an embodiment of the present invention;

[0051] Figure 13 This is a schematic diagram of a limiting socket with a socket guide slope provided in an embodiment of the present invention;

[0052] Figure 14 This is a schematic diagram showing the location of the guide slope for the pin provided in an embodiment of the present invention;

[0053] Figure 15 A schematic diagram of a piston limiting mechanism including a first magnetic element, a second magnetic element, and a third magnetic element, provided for an embodiment of the present invention;

[0054] Figure 16 A schematic diagram of a structure provided in an embodiment of the present invention, in which a third magnetic element blocks a first magnetic element to prevent the piston from being driven to move away from the sheath.

[0055] Figure 17 This is an enlarged schematic diagram of the structure provided in an embodiment of the present invention, in which the second magnetic component attracts the first magnetic component, causing the piston limiting mechanism to fail.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1. Sheath; 2. Piston; 3. Hard needle; 4. Trigger; 5. Inverted component; 6. Limiting latch interface; 7. Limiting latch joint; 8. Unlocking sliding part; 9. Upper housing; 10. Lower housing; 11. Connecting rod; 12. Connector; 13. Limiting pin; 14. Limiting insertion hole; 15. Pin guide slope; 16. Limiting vertical surface; 17. Pin guide slope; 18. Insertion hole guide slope; 19. First magnetic component; 20. Second magnetic component; 21. Third magnetic component; 22. Limiting protrusion. Detailed Implementation

[0058] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] Furthermore, 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.

[0060] Example 1

[0061] This embodiment provides a vascular suturing device, such as Figure 1 As shown, it includes:

[0062] outer shell;

[0063] Sheath 1, which houses a needle and suture to form an access channel for passing through the host blood vessel wall;

[0064] Piston 2, on which a rigid needle 3 is provided, is driven to move forward or backward toward the sheath 1 to complete the vascular suturing work;

[0065] A trigger, used to release the position restriction of the piston 2;

[0066] A piston limiting mechanism is used to restrict the piston 2 from moving toward a proximal position away from the sheath 1.

[0067] In this embodiment, as Figures 2 to 4 As shown, the piston limiting mechanism includes: an inverted buckle component 5 and a limiting card interface 6 disposed opposite to the inverted buckle component 5;

[0068] like Figure 2 As shown, the inverted component 5 is provided with a limiting engagement part 7, which is used to restrict the piston 2 from moving toward the proximal position away from the sheath tube 1; and, in this embodiment, the limiting engagement part 7 has an L-shaped structure.

[0069] like Figure 3As shown, the inverted component 5 is also provided with an unlocking sliding part 8. During the process of the piston 2 moving forward towards the sheath 1 under drive, the connecting rod 11 of the inverted component 5 undergoes yielding deformation or breakage, causing the inverted component 5 to reposition itself. After the connecting rod 11 yields or breaks, during the process of the piston 2 moving towards a proximal position away from the sheath 1, the piston limiting mechanism fails. In this embodiment, as... Figure 4 As shown, the limiting engagement part 7 is a right-angle engaging limiting surface; the unlocking sliding part 8 is an arc-shaped transition guide surface. Furthermore, in this embodiment, the limiting engagement part 7 and the unlocking sliding part 8 are disposed on the wedge-shaped trigger structure of the inverted component 5, and the wedge-shaped trigger structure is disposed on the side of the connecting rod 11.

[0070] In this embodiment, the inverted buckle component 5 is disposed on the outer shell, and the limiting clip interface 6 is disposed on the piston 2. The connecting rod 11 undergoes yielding deformation or breakage as follows: Figure 8 As shown, the structure of the connecting rod 11 in its normal state is as follows: Figure 9 As shown.

[0071] Of course, this embodiment does not specifically limit the object that breaks during the process of the piston 2 being driven to move toward the sheath 1. In other embodiments, during the process of the piston 2 being driven to move toward the sheath 1, the connecting rod of the limiting card interface 6 undergoes yielding deformation or breaks, so that the limiting card interface 6 can be moved aside.

[0072] Of course, this embodiment does not specifically limit the shape of the limiting latching part 7. In other embodiments, the limiting latching part 7 can also be an S-shaped structure, a C-shaped structure, etc.

[0073] Of course, this embodiment does not specifically limit whether the vascular suturing device includes the aforementioned trigger. In other embodiments, the vascular suturing device does not have the aforementioned trigger. The operator triggers the vascular suturing device and releases the position restriction on the piston 2 by means of an electric control mechanism or manual drive.

[0074] Example 2

[0075] This embodiment provides a vascular suturing device, such as Figure 1 As shown, it includes:

[0076] outer shell;

[0077] Sheath 1, which houses a needle and suture to form an access channel for passing through the host blood vessel wall;

[0078] Piston 2, on which a rigid needle 3 is provided, is driven to move forward or backward toward the sheath 1 to complete the vascular suturing work;

[0079] A trigger, used to release the position restriction of the piston 2;

[0080] A piston limiting mechanism is used to restrict the piston 2 from moving toward a proximal position away from the sheath 1.

[0081] In this embodiment, the piston limiting mechanism includes: an inverted buckle component 5 and a limiting card interface 6 disposed opposite to the inverted buckle component 5;

[0082] like Figure 2 As shown, the inverted component 5 is provided with a limiting engagement part 7, which is used to restrict the piston 2 from moving toward the proximal position away from the sheath tube 1; and, in this embodiment, the limiting engagement part 7 has an L-shaped structure.

[0083] like Figure 3 As shown, the inverted component 5 is also provided with an unlocking sliding part 8. During the process of the piston 2 moving forward towards the sheath 1 under drive, the connecting rod 11 of the inverted component 5 yields, deforms, or breaks, causing the inverted component 5 to reposition itself. After the connecting rod 11 yields, deforms, or breaks, during the process of the piston 2 moving towards a proximal position away from the sheath 1, the piston limiting mechanism fails. In this embodiment, as... Figure 4 As shown, the limiting engagement part 7 is a right-angle engaging limiting surface; the unlocking sliding part 8 is an arc-shaped transition guide surface. Furthermore, in this embodiment, the limiting engagement part 7 and the unlocking sliding part 8 are disposed on the wedge-shaped trigger structure of the inverted component 5, and the wedge-shaped trigger structure is disposed on the side of the connecting rod 11.

[0084] In this embodiment, the outer shell includes: an upper shell 9 and a lower shell 10; as shown Figure 5 As shown, the inverted buckle component 5 is disposed on the upper housing 9, and the limiting clip interface 6 is disposed on the piston 2. The connecting rod 11 undergoes yielding deformation or breakage as follows: Figure 8 As shown, the structure of the connecting rod 11 in its normal state is as follows: Figure 9 As shown.

[0085] Of course, this embodiment does not specifically limit the object that breaks during the process of the piston 2 being driven to move toward the sheath 1. In other embodiments, during the process of the piston 2 being driven to move toward the sheath 1, the connecting rod of the limiting card interface 6 undergoes yielding deformation or breaks, so that the limiting card interface 6 can be moved aside.

[0086] Of course, this embodiment does not specifically limit the shape of the limiting latching part 7. In other embodiments, the limiting latching part 7 can also be an S-shaped structure, a C-shaped structure, etc.

[0087] Of course, this embodiment does not specifically limit whether the vascular suturing device includes the aforementioned trigger. In other embodiments, the vascular suturing device does not have the aforementioned trigger. The operator triggers the vascular suturing device and releases the position restriction on the piston 2 by means of an electric control mechanism or manual drive.

[0088] Example 3

[0089] This embodiment provides a vascular suturing device, such as Figure 1 As shown, it includes:

[0090] outer shell;

[0091] Sheath 1, which houses a needle and suture to form an access channel for passing through the host blood vessel wall;

[0092] Piston 2, on which a rigid needle 3 is provided, is driven to move forward or backward toward the sheath 1 to complete the vascular suturing work;

[0093] A trigger, used to release the position restriction of the piston 2;

[0094] A piston limiting mechanism is used to restrict the piston 2 from moving toward a proximal position away from the sheath 1.

[0095] In this embodiment, the piston limiting mechanism includes: an inverted buckle component 5 and a limiting card interface 6 disposed opposite to the inverted buckle component 5;

[0096] like Figure 2 As shown, the inverted component 5 is provided with a limiting engagement part 7, which is used to restrict the piston 2 from moving toward the proximal position; and, in this embodiment, the limiting engagement part 7 has an L-shaped structure.

[0097] like Figure 3 As shown, the inverted component 5 is also provided with an unlocking sliding part 8. During the process of the piston 2 moving forward towards the sheath 1 under drive, the connecting rod 11 of the inverted component 5 yields, deforms, or breaks, causing the inverted component 5 to reposition itself. After the connecting rod 11 yields, deforms, or breaks, during the process of the piston 2 moving towards a proximal position away from the sheath 1, the piston limiting mechanism fails. In this embodiment, as... Figure 4 As shown, the limiting engagement part 7 is a right-angle engaging limiting surface; the unlocking sliding part 8 is an arc-shaped transition guide surface. Furthermore, in this embodiment, the limiting engagement part 7 and the unlocking sliding part 8 are disposed on the wedge-shaped trigger structure of the inverted component 5, and the wedge-shaped trigger structure is disposed on the side of the connecting rod 11.

[0098] In this embodiment, the outer shell includes: an upper shell 9 and a lower shell 10; as shown Figure 6As shown, the inverted buckle component 5 is disposed on the lower housing 10, and the limiting clip interface 6 is disposed on the piston 2. The connecting rod 11 undergoes yielding deformation or breakage as follows: Figure 8 As shown, the structure of the connecting rod 11 in its normal state is as follows: Figure 9 As shown.

[0099] Of course, this embodiment does not specifically limit the object that breaks during the process of the piston 2 being driven to move toward the sheath 1. In other embodiments, during the process of the piston 2 being driven to move toward the sheath 1, the connecting rod of the limiting card interface 6 undergoes yielding deformation or breaks, so that the limiting card interface 6 can be moved aside.

[0100] Of course, this embodiment does not specifically limit the shape of the limiting latching part 7. In other embodiments, the limiting latching part 7 can also be an S-shaped structure, a C-shaped structure, etc.

[0101] Of course, this embodiment does not specifically limit whether the vascular suturing device includes the aforementioned trigger. In other embodiments, the vascular suturing device does not have the aforementioned trigger. The operator triggers the vascular suturing device and releases the position restriction on the piston 2 by means of an electric control mechanism or manual drive.

[0102] Example 4

[0103] This embodiment provides a vascular suturing device, such as Figure 1 As shown, it includes:

[0104] outer shell;

[0105] Sheath 1, which houses a needle and suture to form an access channel for passing through the host blood vessel wall;

[0106] Piston 2, on which a rigid needle 3 is provided, is driven to move forward or backward toward the sheath 1 to complete the vascular suturing work;

[0107] A trigger, used to release the position restriction of the piston 2;

[0108] Connector 12, disposed within the housing, is used to drively connect the trigger 4, the sheath 1, and the piston 2.

[0109] A piston limiting mechanism is used to restrict the piston 2 from moving toward a proximal position away from the sheath 1.

[0110] In this embodiment, the piston limiting mechanism includes: an inverted buckle component 5 and a limiting card interface 6 disposed opposite to the inverted buckle component 5;

[0111] The inverted component 5 is provided with a limiting engagement part 7, which is used to restrict the piston 2 from moving toward the proximal position away from the sheath tube 1; and, in this embodiment, the limiting engagement part 7 has an L-shaped structure.

[0112] The inverted component 5 is also provided with an unlocking sliding part 8. During the process of the piston 2 moving forward towards the sheath 1 under drive, the connecting rod 11 of the inverted component 5 undergoes yielding deformation or breakage, causing the inverted component 5 to reposition itself. After the connecting rod 11 yields or breaks, during the process of the piston 2 moving towards a proximal position away from the sheath 1, the piston limiting mechanism fails. In this embodiment, as... Figure 4 As shown, the limiting engagement part 7 is a right-angle engaging limiting surface; the unlocking sliding part 8 is an arc-shaped transition guide surface. Furthermore, in this embodiment, the limiting engagement part 7 and the unlocking sliding part 8 are disposed on the wedge-shaped trigger structure of the inverted component 5, and the wedge-shaped trigger structure is disposed on the side of the connecting rod 11.

[0113] In this embodiment, as Figure 7 As shown, the inverted buckle component 5 is disposed on the connector 12, and the limiting card interface 6 is disposed on the piston 2.

[0114] Of course, this embodiment does not specifically limit the object that breaks during the process of the piston 2 being driven to move toward the sheath 1. In other embodiments, during the process of the piston 2 being driven to move toward the sheath 1, the connecting rod of the limiting card interface 6 undergoes yielding deformation or breaks, so that the limiting card interface 6 can be moved aside.

[0115] Of course, this embodiment does not specifically limit the shape of the limiting latching part 7. In other embodiments, the limiting latching part 7 can also be an S-shaped structure, a C-shaped structure, etc.

[0116] Of course, this embodiment does not specifically limit whether the vascular suturing device includes the aforementioned trigger. In other embodiments, the vascular suturing device does not have the aforementioned trigger. The operator triggers the vascular suturing device and releases the position restriction on the piston 2 by means of an electric control mechanism or manual drive.

[0117] Example 5

[0118] This embodiment provides a vascular suturing device, such as Figure 1 As shown, it includes:

[0119] The outer casing includes: an upper casing 9 and a lower casing 10;

[0120] Sheath 1, which houses a needle and suture to form an access channel for passing through the host blood vessel wall;

[0121] Piston 2, on which a rigid needle 3 is provided, is driven to move forward or backward toward the sheath 1 to complete the vascular suturing work;

[0122] A trigger, used to release the position restriction of the piston 2;

[0123] Connector 12, disposed within the housing, is used to drively connect the trigger 4, the sheath 1, and the piston 2.

[0124] A piston limiting mechanism is used to restrict the piston 2 from moving toward a proximal position away from the sheath 1.

[0125] In this embodiment, as Figure 10 and Figure 11 As shown, the piston limiting mechanism includes: a limiting pin 13 that is inserted and fixed on the lower housing 10, and a limiting hole 14 disposed on the piston 2 and disposed opposite to the limiting pin 13;

[0126] like Figure 10 As shown, the limiting pin 13 is provided with a pin guide slope 15; during the process of the piston 2 being driven to move towards the sheath 1, the limiting pin 13 slides away from the limiting insertion hole 14 under the drive of the piston 2, so that the limiting pin 13 gives way and the piston limiting mechanism fails.

[0127] like Figure 11 As shown, the limiting pin 13 is provided with a limiting vertical surface 16, and the side of the limiting hole 14 facing the limiting vertical surface 16 is a vertical surface adapted to it; the limiting vertical surface 16 abuts against the limiting hole 14, restricting the piston 2 from moving toward the proximal position.

[0128] In this embodiment, as Figure 10 and Figure 11 As shown, the limiting pin 13 is provided with two sets of limiting protrusions 22, and the two sets of limiting protrusions 22 are located at different positions along the length of the limiting pin 13. In addition, the lower housing 10 is provided with two sets of slots that are adapted to the shape of the limiting protrusions 22. The aforementioned corresponding limiting protrusions 22 and slots can effectively engage and fix the limiting pin 13 on the lower housing 10, and prevent the limiting pin 13 from shifting and reconnecting to the limiting hole 14 after the piston limiting mechanism fails.

[0129] Of course, this embodiment does not specifically limit the setting position of the limiting pin 13. In other embodiments, the limiting pin 13 can also be set on the upper housing 9, and the piston 2 has a limiting hole 14 that is adapted to the limiting pin 13.

[0130] Of course, this embodiment does not specifically limit the way the limiting pin 13 is fixed to the lower housing 10. In other embodiments, such as Figure 12 As shown, the limiting pin 13 is fixed to the lower housing 10 by integral molding.

[0131] Of course, this embodiment does not specifically limit the setting position of the limiting protrusion 22 and the card slot. In other embodiments, the limiting protrusion 22 can also be set on the outer shell, and the card slot can be set on the limiting pin 13.

[0132] Of course, this embodiment does not specifically limit the number of limiting protrusions 22 and slots. In other embodiments, a set of limiting protrusions 22 is provided on the limiting pin 13, and a set of slots adapted to the limiting protrusions 22 are provided on the outer shell.

[0133] Of course, this embodiment does not specifically limit whether the vascular suturing device includes the aforementioned trigger. In other embodiments, the vascular suturing device does not have the aforementioned trigger. The operator triggers the vascular suturing device and releases the position restriction on the piston 2 by means of an electric control mechanism or manual drive.

[0134] Example 6

[0135] This embodiment provides a vascular suturing device, such as Figure 1 As shown, it includes:

[0136] The outer casing includes: an upper casing 9 and a lower casing 10;

[0137] Sheath 1, which houses a needle and suture to form an access channel for passing through the host blood vessel wall;

[0138] Piston 2, on which a rigid needle 3 is provided, is driven to move forward or backward toward the sheath 1 to complete the vascular suturing work;

[0139] A trigger, used to release the position restriction of the piston 2;

[0140] Connector 12, disposed within the housing, is used to drively connect the trigger 4, the sheath 1, and the piston 2.

[0141] A piston limiting mechanism is used to restrict the piston 2 from moving toward a proximal position away from the sheath 1.

[0142] In this embodiment, as Figure 13 As shown, the piston limiting mechanism includes: a limiting pin 13 that is inserted and fixed on the lower housing 10, and a limiting hole 14 disposed on the piston 2 and disposed opposite to the limiting pin 13;

[0143] The limiting insertion hole 14 is provided with a hole guide slope 18; as the piston 2 is driven to move forward toward the sheath 1, the limiting pin 13 slides away from the limiting insertion hole 14 under the drive of the piston 2, so that the limiting pin 13 gives way and the piston limiting mechanism fails.

[0144] The limiting pin 13 is provided with a limiting vertical surface 16, and the side of the limiting hole 14 facing the limiting vertical surface 16 is a vertical surface adapted to it; the limiting vertical surface 16 abuts against the limiting hole 14, restricting the piston 2 from moving toward the proximal position.

[0145] In addition, such as Figure 13 As shown, the limiting pin 13 is provided with two sets of limiting protrusions 22, and the two sets of limiting protrusions 22 are located at different positions along the length of the limiting pin 13. In addition, the lower housing 10 is provided with two sets of slots that are adapted to the shape of the limiting protrusions 22. The aforementioned corresponding limiting protrusions 22 and slots can effectively engage and fix the limiting pin 13 on the lower housing 10, and prevent the limiting pin 13 from shifting and reconnecting to the limiting hole 14 after the piston limiting mechanism fails.

[0146] Of course, this embodiment does not specifically limit the setting position of the limiting pin 13. In other embodiments, the limiting pin 13 can also be set on the upper housing 9, and the piston 2 has a limiting hole 14 that is adapted to the limiting pin 13.

[0147] Of course, this embodiment does not specifically limit the way the limiting pin 13 is fixed to the lower housing 10. In other embodiments, such as Figure 12 As shown, the limiting pin 13 is fixed to the lower housing 10 by integral molding.

[0148] Of course, this embodiment does not specifically limit the setting position of the limiting protrusion 22 and the card slot. In other embodiments, the limiting protrusion 22 can also be set on the outer shell, and the card slot can be set on the limiting pin 13.

[0149] Of course, this embodiment does not specifically limit the number of limiting protrusions 22 and slots. In other embodiments, a set of limiting protrusions 22 is provided on the limiting pin 13, and a set of slots adapted to the limiting protrusions 22 are provided on the outer shell.

[0150] Of course, this embodiment does not specifically limit whether the vascular suturing device includes the aforementioned trigger. In other embodiments, the vascular suturing device does not have the aforementioned trigger. The operator triggers the vascular suturing device and releases the position restriction on the piston 2 by means of an electric control mechanism or manual drive.

[0151] Example 7

[0152] This embodiment provides a vascular suturing device, such as Figure 1 As shown, it includes:

[0153] The outer casing includes: an upper casing 9 and a lower casing 10;

[0154] Sheath 1, which houses a needle and suture to form an access channel for passing through the host blood vessel wall;

[0155] Piston 2, on which a rigid needle 3 is provided, is driven to move forward or backward toward the sheath 1 to complete the vascular suturing work;

[0156] A trigger, used to release the position restriction of the piston 2;

[0157] Connector 12, disposed within the housing, is used to drively connect the trigger 4, the sheath 1, and the piston 2.

[0158] A piston limiting mechanism is used to restrict the piston 2 from moving toward a proximal position away from the sheath 1.

[0159] In this embodiment, as Figure 14 As shown, the piston limiting mechanism includes: a limiting pin 13 that is inserted and fixed on the lower housing 10, and a limiting hole 14 disposed on the piston 2 and disposed opposite to the limiting pin 13;

[0160] The limiting pin 13 is provided with a pin guide slope 15; and, as Figure 14 As shown, the piston 2 is provided with a pin guide slope 17 that matches the shape of the pin guide slope 15 of the limiting pin 13. During the process of the piston 2 moving forward toward the sheath 1 under the drive of the piston 2, the limiting pin 13 slides away from the limiting insertion hole 14, causing the limiting pin 13 to retract, and the piston limiting mechanism becomes ineffective.

[0161] The limiting pin 13 is provided with a limiting vertical surface 16, and the side of the limiting hole 14 facing the limiting vertical surface 16 is a vertical surface adapted to it; the limiting vertical surface 16 abuts against the limiting hole 14, restricting the piston 2 from moving toward the proximal position.

[0162] Of course, this embodiment does not specifically limit the setting position of the limiting pin 13. In other embodiments, the limiting pin 13 can also be set on the upper housing 9, and the piston 2 has a limiting hole 14 that is adapted to the limiting pin 13.

[0163] Of course, this embodiment does not specifically limit the way the limiting pin 13 is fixed to the lower housing 10. In other embodiments, such as Figure 12 As shown, the limiting pin 13 is fixed to the lower housing 10 by integral molding.

[0164] Of course, this embodiment does not specifically limit whether the vascular suturing device includes the aforementioned trigger. In other embodiments, the vascular suturing device does not have the aforementioned trigger. The operator triggers the vascular suturing device and releases the position restriction on the piston 2 by means of an electric control mechanism or manual drive.

[0165] Example 8

[0166] This embodiment provides a vascular suturing device, such as Figure 1 As shown, it includes:

[0167] The outer casing includes: an upper casing 9 and a lower casing 10;

[0168] Sheath 1, which houses a needle and suture to form an access channel for passing through the host blood vessel wall;

[0169] Piston 2, on which a rigid needle 3 is provided, is driven to move forward or backward toward the sheath 1 to complete the vascular suturing work;

[0170] A trigger, used to release the position restriction of the piston 2;

[0171] Connector 12, disposed within the housing, is used to drively connect the trigger 4, the sheath 1, and the piston 2.

[0172] A piston limiting mechanism is used to restrict the piston 2 from moving toward a proximal position away from the sheath 1.

[0173] In this embodiment, the piston limiting mechanism includes: magnetic limiting components respectively disposed on the outer shell and the piston 2; the magnetic limiting components are used to restrict the piston 2 from moving toward the proximal position.

[0174] like Figure 15 As shown, the magnetic limiting component includes: a first magnetic element 19 disposed on the outer shell, and a second magnetic element 20 and a third magnetic element 21 disposed on the piston 2 respectively;

[0175] like Figure 17 As shown, the second magnetic element 20 has the opposite magnetic properties to the first magnetic element 19. The second magnetic element 20 is disposed at the proximal end position so that the piston 2 is driven to move toward the direction of the sheath 1.

[0176] like Figure 16As shown, the third magnetic element 21 has the same magnetism as the first magnetic element 19. The third magnetic element 21 is located at the distal end to prevent the piston 2 from being driven to move away from the sheath 1.

[0177] Of course, this embodiment does not specifically limit whether the vascular suturing device includes the aforementioned trigger. In other embodiments, the vascular suturing device does not have the aforementioned trigger. The operator triggers the vascular suturing device and releases the position restriction on the piston 2 by means of an electric control mechanism or manual drive.

[0178] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A vascular suture device, characterized in that, include: outer shell; Piston (2), on which a hard needle (3) is provided, is driven to move forward or backward toward the sheath (1) to complete the vascular suturing work; A piston limiting mechanism is provided on the piston and the outer shell to restrict the piston (2) from moving toward a proximal position away from the sheath (1). The piston limiting mechanism fails during the process of the piston (2) being driven to move toward the sheath (1).

2. The vascular suture device according to claim 1, characterized in that, The piston limiting mechanism includes: an undercut component (5) and a limiting card interface (6) disposed opposite to the undercut component (5); The inverted component (5) is provided with a limiting engagement part (7), which is used to restrict the piston (2) from moving toward a position away from the proximal end of the sheath (1); The buckle component (5) is also provided with an unlocking sliding part (8). When the piston (2) is driven to move towards the sheath (1), the buckle component (5) or the limiting card interface (6) undergoes yielding deformation or breakage, so that one of the buckle component (5) and the limiting card interface (6) gives way.

3. The vascular suture device according to claim 2, characterized in that, The outer casing includes an upper casing (9) and a lower casing (10); the buckle component (5) is disposed on the upper casing (9), and the limiting card interface (6) is disposed on the piston (2); or, The outer shell includes an upper shell (9) and a lower shell (10); the buckle component (5) is disposed on the lower shell (10), and the limiting card interface (6) is disposed on the piston (2).

4. The vascular suture device according to claim 2, characterized in that, Also includes: A connector (12) is disposed within the housing for drivingly connecting the sheath (1) and the piston (2); The buckle component (5) is disposed on the connector (12), and the limiting card interface (6) is disposed on the piston (2).

5. The vascular suture device according to any one of claims 2 to 4, characterized in that, The limiting locking part (7) is a right-angle locking limiting surface; The unlocking sliding part (8) is an arc-shaped transition guide surface.

6. The vascular suture device according to any one of claims 2 to 4, characterized in that, The limiting latching part (7) and the unlocking sliding part (8) are disposed on the wedge-shaped triggering structure of the buckling component (5), and the wedge-shaped triggering structure is disposed on the side of the connecting rod (11) of the buckling component (5).

7. The vascular suture device according to claim 1, characterized in that, The piston limiting mechanism includes: a limiting pin (13) disposed on the outer shell, and a limiting hole (14) disposed on the piston (2) and disposed opposite to the limiting pin (13). The limiting pin (13) is provided with a pin guide slope (15); as the piston (2) is driven to move toward the sheath (1), the limiting pin (13) slides away from the limiting hole (14) under the drive of the piston (2), so that the limiting pin (13) gives way and the piston limiting mechanism fails. The limiting pin (13) is provided with a limiting vertical surface (16), and the side of the limiting hole (14) facing the limiting vertical surface (16) is a vertical surface that is adapted to it; the limiting vertical surface (16) abuts against the limiting hole (14) to restrict the piston (2) from moving toward the proximal position.

8. The vascular suture device according to claim 7, characterized in that, The piston (2) is provided with a pin guide slope (17) that matches the shape of the pin guide slope (15) of the limiting pin (13).

9. The vascular suture device according to claim 1, characterized in that, The piston limiting mechanism includes: a limiting pin (13) disposed on the outer shell, and a limiting hole (14) disposed on the piston (2) and disposed opposite to the limiting pin (13). The limiting insertion hole (14) is provided with a hole guide slope (18); as the piston (2) is driven to move towards the sheath (1), the limiting pin (13) slides away from the limiting insertion hole (14) under the drive of the piston (2), so that the limiting pin (13) gives way and the piston limiting mechanism fails. The limiting pin (13) is provided with a limiting vertical surface (16), and the side of the limiting hole (14) facing the limiting vertical surface (16) is a vertical surface that is adapted to it; the limiting vertical surface (16) abuts against the limiting hole (14) to restrict the piston (2) from moving toward the proximal position.

10. The vascular suture device according to any one of claims 7 to 9, characterized in that, The limiting pin (13) is inserted and fixed to the outer shell; or, The limiting pin (13) is fixed to the outer shell by integral molding.

11. The vascular suturing device according to claim 10, characterized in that, The limiting pin (13) and the outer shell are provided with a limiting protrusion (22) on one of them, and the limiting pin (13) and the outer shell are provided with a slot that matches the limiting protrusion (22) on the other. The limiting pin (13) is fixed to the outer shell by the limiting protrusion (22) and the slot to prevent the limiting pin (13) from being displaced.

12. The vascular suturing device according to claim 11, characterized in that, The limiting protrusions (22) are in at least two sets and are located at different positions along the length of the limiting pin (13); the number of the slots is adapted to the number of the limiting protrusions (22).

13. The vascular suture device according to claim 1, characterized in that, The piston limiting mechanism includes: magnetic limiting components respectively disposed on the outer shell and the piston (2); The magnetic limiting component is used to restrict the piston (2) from moving toward the proximal position.

14. The vascular suture device according to claim 13, characterized in that, The magnetic limiting component includes: a first magnetic element (19) disposed on the outer shell, and a second magnetic element (20) and a third magnetic element (21) disposed on the piston (2). The second magnetic element (20) has the opposite magnetism to the first magnetic element (19), and the second magnetic element (20) is disposed at the proximal end position so that the piston (2) is driven to move toward the direction close to the sheath (1); The third magnetic element (21) has the same magnetism as the first magnetic element (19). The third magnetic element (21) is located at the distal end to prevent the piston (2) from being driven to move away from the sheath (1).

15. The vascular suture device according to claim 2, characterized in that, The inverted component (5) has an L-shaped structure.

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