A tourniquet and a tourniquet mechanism

Abstract

The present invention relates to the technical field of medical devices, and in particular to a tourniquet and a belt compartment mechanism. The tourniquet is an integrally formed belt-shaped structure, the tourniquet can be formed into a ring-shaped structure along an arc surface in the length direction, the ring structure can be pressed and bent along one width direction to form a bent structure, the bent structure includes a bent portion and a first clamp arm and a second clamp arm distributed on both sides of the bent portion, the first clamp arm and the second clamp arm are in an arc shape convex in the same direction, the bent structure is elastic and can maintain its own shape when not under force, and thus the tourniquet can cooperate with hemostatic forceps to stably clamp the blood vessel to be closed.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a tourniquet and a tourniquet mechanism. Background Art

[0002] In order to fully expose the surgical field of view during surgical operations, it is necessary to ligate the blood vessels around the target tissue to stop bleeding. Doctors usually use hemostatic forceps to ligate the blood vessels around the target tissue. They often first place the blood vessel to be clamped in the jaws formed by two clamp arms, with a V-shaped ligation clamp pre-placed in the jaws, and then close the two clamp arms to close the blood vessel with the V-shaped ligation clamp. However, during the clamping process of existing hemostatic forceps, the blood vessel is easy to slip out of the jaws, resulting in improper hemostasis, and because the diameters of the blood vessels to be clamped are different, the V-shaped ligation clamp often requires the design of multiple sizes to adapt, which is cumbersome to operate.

[0003] There is a new idea of ​​using a tourniquet in combination with a clamp arm having a hook portion to clamp a blood vessel. Specifically, the hemostatic forceps under this new idea include a belt bin structure, a belt feeding structure, a firing structure, a clamp arm and a sleeve; the belt bin structure includes a belt bin for accommodating the tourniquet, and the belt bin structure is fixedly accommodated in the sleeve; the proximal end of the clamp arm is fixedly installed in the sleeve, the distal end of the clamp arm has a hook portion, the hook portion extends out of the sleeve, a belt feeding groove is provided on the clamp arm, the proximal end of the belt feeding groove is located in the sleeve and communicates with the inner space of the belt bin to form a belt feeding channel, the distal end of the belt feeding groove is located on the inner side of the hook portion and is bent along the shape of the hook portion; the distal end of the belt feeding structure is inserted into the sleeve, and the belt feeding structure cooperates with the tourniquet; the firing structure is penetrated in the sleeve, and the firing structure cooperates with the hook portion.

[0004] During the process of clamping a blood vessel with the hemostatic forceps, the blood vessel to be clamped is located in the jaws formed by the curved hook portion, the tourniquet located at the farthest end of the belt delivery channel is the tourniquet to be inserted into the forceps, the belt delivery structure moves farthest, and pushes all the tourniquets in the belt delivery channel to move farthest, when the belt delivery structure is located at the far end position of the belt delivery structure, the far end of the tourniquet to be inserted into the forceps surrounds the blood vessel to be clamped along the belt delivery groove, and the far end of the tourniquet to be inserted into the forceps extends out of the belt delivery groove; the firing structure moves farthest, and closes the tourniquet to be inserted into the forceps to achieve the clamping of the blood vessel to be clamped.

[0005] The new idea of ​​using a tourniquet and a clamp arm with a hook portion to clamp a blood vessel is proposed above. The clamp arm with a hook portion at the distal end is used to clamp the blood vessel. On the one hand, the hook portion can easily hook the blood vessel to be clamped. On the other hand, the blood vessel to be clamped can be stably kept in the jaws formed by the hook portion. During the clamping process, the blood vessel to be clamped is not easy to slip out of the jaws, making the blood vessel clamping process stable and effective. In addition, by controlling the stroke of the firing structure, the clamping force applied to the blood vessel by the firing structure and the hook portion of the clamp arm is controlled, so that with the help of a belt bin assembly, it is suitable for clamping blood vessels of different thicknesses, and there is no need to frequently replace different models of hemostatic forceps according to the different diameters of the blood vessels to be clamped.

[0006] In order to cooperate with the use of hemostatic forceps under the new idea, a tourniquet is urgently needed. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the problems existing in the above-mentioned technologies, the present invention solves them at least to a certain extent. To this end, the first object of the present invention is to provide a tourniquet that can cooperate with the belt compartment structure, belt feeding structure, firing structure and clamp arm in the hemostatic forceps to achieve stable clamping of blood vessels.

[0009] The second object of the present invention is to provide a band magazine mechanism having the above-mentioned tourniquet.

[0010] (II) Technical solution

[0011] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0012] In the first aspect, the present invention provides a tourniquet, which is an integrally formed belt-like structure. The tourniquet can be formed into a ring-shaped structure along an arc surface in the length direction. The ring structure can be pressed and bent along one width direction to form a bent structure. The bent structure includes a bending portion and a first clamp arm and a second clamp arm distributed on both sides of the bending portion. The first clamp arm and the second clamp arm are in an arc shape convex in the same direction. The bending structure is elastic and can maintain its own shape when not subjected to force.

[0013] Preferably, the distance between the opposite surfaces of the first clamping arm and the second clamping arm is 0.3-3 mm.

[0014] Preferably, a plurality of anti-slip portions arranged in sequence along the length direction of the tourniquet are provided on the side of the tourniquet that contacts the blood vessel to be clamped, and each anti-slip portion is in the shape of a strip extending along the width direction of the tourniquet.

[0015] Preferably, the anti-slip portion is constructed as first anti-slip grooves provided on the tourniquet, and the first anti-slip grooves are arranged parallel to each other; or, the anti-slip portion is constructed as second anti-slip grooves provided on the tourniquet and arranged in two rows in a staggered manner along the width direction, and the second anti-slip grooves are arranged parallel to each other.

[0016] Preferably, the angle between the first anti-slip groove and the edge of the tourniquet extending along the length direction is greater than or less than 90°; or, the angle between the second anti-slip groove and the edge of the tourniquet extending along the length direction is greater than or less than 90°.

[0017] Preferably, a groove extending along the width direction of the tourniquet is opened in the middle of the length direction of the tourniquet, and the groove is located on the side of the tourniquet used to contact the blood vessel to be clamped; the annular structure is pressed and bent along the groove to form a bending structure, and the groove serves as the bending part of the bending structure.

[0018] Preferably, the cross-sectional shape of the groove is V-shaped or arc-shaped.

[0019] Preferably, a bayonet opening facing distally is provided at the proximal end of the tourniquet.

[0020] Preferably, a hook is provided at a position corresponding to the snap-on socket at the distal end of the tourniquet; when the tourniquet is shaped into an annular structure, the hook is arranged opposite to the snap-on socket, and when the annular structure is pressed together, the hook can enter the snap-on socket and snap onto it.

[0021] Preferably, two adjacent surfaces of the tourniquet are transitioned through arc surfaces.

[0022] In the second aspect, the present invention also provides a belt magazine mechanism, including the above-mentioned tourniquet, and also includes a clamp arm for accommodating the tourniquet, a belt feeding structure for pushing the tourniquet, and a firing structure for pressing the tourniquet; the distal end of the clamp arm has a bending portion, and a belt receiving groove is provided on the clamp arm, and the distal end of the belt receiving groove is located on the inner side of the bending portion and is bent along the shape of the bending portion; the belt feeding structure is used to push the tourniquet into the belt receiving groove, and when the belt feeding structure is located at the distal end position of the belt feeding structure, the distal end of the farthest tourniquet is shaped into a ring structure along the belt receiving groove; when the firing structure is fired, the firing structure presses the ring structure into a bending structure to clamp the blood vessel.

[0023] (III) Beneficial effects

[0024] The beneficial effects of the present invention are:

[0025] The tourniquet proposed in the present invention can be shaped into an annular structure along the curved surface on the hemostatic forceps in the length direction, and the annular structure can be pressed together to form a bent structure along its width direction. At the same time, the bent structure is elastic and can maintain its own shape when not subjected to force. Therefore, the tourniquet can cooperate with the belt bin structure, belt feeding structure, firing structure and clamp arm in the hemostatic forceps to achieve stable clamping of the blood vessel.

[0026] The present invention proposes a new idea of ​​using a tourniquet and a clamp arm with a hook portion to clamp a blood vessel. The clamp arm with a hook portion at the distal end is used to clamp the blood vessel. On the one hand, the hook portion can easily hook the blood vessel to be clamped, and on the other hand, the blood vessel to be clamped can be stably kept in the jaws formed by the hook portion. During the clamping process, the blood vessel to be clamped is not easy to slip out of the jaws, making the blood vessel clamping process stable and effective. By changing the stroke of the firing structure, the distance between the firing structure and the hook portion can be adjusted to be appropriately less than or equal to the thickness of the two blood vessel walls of the blood vessel to be clamped, that is, the clamping force applied to the blood vessel to be clamped by the firing structure and the hook portion of the clamp arm can be adjusted, and then it can be used in conjunction with a tourniquet to clamp blood vessels of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is described with the aid of the following drawings:

[0028] Figure 1 is a schematic diagram of the structure of the tourniquet in Example 1;

[0029] Figure 2 yes Figure 1 Top view of the tourniquet;

[0030] Figure 3 yes Figure 1 Front view of the middle tourniquet;

[0031] Figure 4 is a schematic structural diagram of another form of the tourniquet in Example 1;

[0032] Figure 5 is a schematic diagram of the structure of the tourniquet in Example 2;

[0033] Figure 6 A cross-sectional schematic diagram of a hemostasis mechanism provided in Example 3, wherein the belt feeding structure is in a firing position;

[0034] Figure 7 is a schematic diagram of the distal structure of the hemostasis mechanism in Example 3, wherein the belt feeding structure and the firing structure are both located at the initial position;

[0035] Figure 8 yes Figure 6 A magnified schematic diagram of part A;

[0036] Fig. 9 is a schematic structural diagram of the distal end of the hemostasis mechanism, wherein the firing structure is located at the firing end position;

[0037] Fig.10 is a schematic diagram of the structure of the distal end of the clamp arm;

[0038] Fig.11 Schematic diagram of the rear view of the clamp arm.

[0039] [Description of Reference Numerals]

[0040] 1: tourniquet; 11: bending portion; 12: first anti-slip groove; 13: second anti-slip groove; 14: hook; 15: bayonet; 16: first clamp arm; 17: second clamp arm;

[0041] 2: Clamp arm; 21: Hook portion; 22: Belt receiving groove; 23: Straight surface; 24: Arc surface; 25: Bent surface; 26: First mounting groove; 27: Second mounting groove; 28: First clamping strip; 29: Second clamping strip; 30: First reset member; 31: Second reset member; 32: First guide surface; 33: Second guide surface; 34: Third guide surface; 35: Fourth guide surface;

[0042] 3: casing;

[0043] 4: firing structure; 41: firing head; 42: firing surface. DETAILED DESCRIPTION

[0044] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. The "near" mentioned herein refers to the side close to the operator, and the "far" refers to the side close to the patient. The directional terms such as "upper", "lower", "front", "back", "left", and "right" mentioned herein are in the order of Figure 1 The orientation is used as a reference, where the direction from near to far is also the direction from back to front.

[0045] Example 1

[0046] like Figure 1-4 As shown, the present embodiment provides a tourniquet 1, which is an integrally formed belt-like structure, and the tourniquet 1 can be shaped and maintained into a ring-like structure along an arc surface in the length direction, and the ring-like structure is used to circumferentially embrace the blood vessel, wherein the ring structure can be pressed together to form a bending structure along its width direction, and the bending structure includes a bending portion 11 and a first clamp arm 16 and a second clamp arm 17 distributed on both sides of the bending portion. Since the tourniquet 1 is pressed together along the arc surface, the first clamp arm 16 and the second clamp arm 17 are arc-shaped and convex in the same direction, and the first clamp arm 16 and the second clamp arm 17 are used to clamp the blood vessel, and at the same time, in the present embodiment, the bending structure is elastic and can maintain its own shape when not under force so that the blood vessel can be stably clamped. The existence of the bending portion 11 makes the tourniquet 1 easy to be bent, and the thickness of the tourniquet 1 is 3-5 mm. In actual application, the tourniquet 1 is made of elastic and absorbable material, preferably magnesium-aluminum alloy, so that the tourniquet 1 has a certain elasticity and ensures that the tourniquet 1 does not rebound after being fired and can keep clamping the blood vessel and can be absorbed by the human body later. It should be noted that Figure 8 The structure of the most distal tourniquet 1 is a ring structure. Fig. 9 The structure of the tourniquet 1 at the farthest end is a bent structure.

[0047] Specifically, after the annular structure is pressed together to form a bending structure along its width direction, in order to ensure that the bending structure can stably clamp the blood vessel, the spacing between the opposite surfaces of the first clamp arm 16 and the second clamp arm 17 in the bending structure is 0.3-3mm to clamp the blood vessel, wherein the spacing between the opposite surfaces of the first clamp arm 16 and the second clamp arm 17 in the bending structure is selected according to the wall thickness of the blood vessel in actual conditions, and thus the tourniquet 1 in this embodiment can cooperate with the new hemostatic forceps to adapt to blood vessels of different diameters.

[0048] like Figure 1 and Figure 4 As shown, a groove extending along the width direction of the tourniquet 1 is opened in the middle of the length direction of the tourniquet 1, and the groove is located on the side of the tourniquet 1 that is used to contact the blood vessel to be clamped. The annular structure is pressed and bent along the groove to form a bending structure, and the groove serves as the bending part of the bending structure.

[0049] Among them, the groove is a through groove. In actual application, the cross-sectional shape of the groove is a V-shaped groove or an arc groove opened on the tourniquet 1, that is, the thickness of the bending portion 11 is less than the overall thickness of the tourniquet 1, so as to facilitate the bending of the tourniquet 1.

[0050] The present embodiment provides a tourniquet 1, which can be shaped into a ring structure along an arc surface in the length direction, and the ring structure can be pressed and bent along one width direction to form a bent structure. At the same time, the bent structure is elastic and can maintain its own shape when not under force so that the blood vessel can be stably clamped to cooperate with the new idea of ​​hemostatic forceps.

[0051] like Figure 1-4 As shown, in order to increase the anti-slip force of the tourniquet 1 when clamping a blood vessel, a plurality of anti-slip portions arranged in sequence along the length direction of the tourniquet 1 are provided on the side of the tourniquet 1 used to contact the blood vessel to be clamped, and each anti-slip portion is in the shape of a strip extending along the width direction of the tourniquet 1. The side used to contact the blood vessel to be clamped refers to the side facing the blood vessel after forming an annular structure, and the anti-slip portions are evenly distributed on both sides of the bending portion 11. It should be noted that in order to facilitate the coordination between the tourniquet 1 and the clamp arm (the clamp arm is described in detail in Example 3), the anti-slip portion is a recessed portion recessed downward from the inner side of the tourniquet 1, thereby ensuring the smoothness of the sliding between the tourniquet 1 and the clamp arm when being fired, thereby ensuring the reliability of the tourniquet 1 being fired.

[0052] like Figure 1-4As shown, the structure of the anti-slip part is a first anti-slip groove 12 provided on the inner side of the tourniquet 1, wherein the first anti-slip groove 12 is a V-shaped groove, which can be an arc groove, and the first anti-slip groove 12 is a through groove for easy production and manufacturing, and the angle between the first anti-slip groove 12 and the edge of the tourniquet 1 extending along the length direction is greater than or less than 90°, that is, it is in an inclined state with the edge of the tourniquet 1 extending along the length direction, and multiple first anti-slip grooves 12 are arranged in parallel. In this embodiment, there are a total of 8 first anti-slip grooves 12 in the tourniquet 1, and 4 first anti-slip grooves 12 are respectively arranged on both sides of the bending portion 11. Since the first anti-slip grooves 12 are inclined toward the same side, when the tourniquet 1 is fired, the tourniquet 1 can be folded along the bending portion 11, that is, after folding, the first anti-slip grooves 12 on both sides of the bending portion 11 are in a cross state, thereby further strengthening the anti-slip force of the tourniquet 1 when clamping the blood vessel.

[0053] In order to prevent the tourniquet 1 from accidentally cutting tissue when it is inside the body, two adjacent surfaces of the tourniquet 1 are transitioned through arc surfaces.

[0054] In order to facilitate the auxiliary feeding of the tourniquet 1 , a clamping opening 15 with its opening facing away is provided at the proximal end of the tourniquet 1 and in the middle along the width direction of the tourniquet 1 .

[0055] In order to improve the reliability of the tourniquet 1 in maintaining the bending structure and avoid the rebound of the tourniquet 1, a hook 14 is arranged at the position corresponding to the snap-in at the distal end of the tourniquet 1. When the tourniquet 1 is shaped into a ring structure, the hook 14 is arranged opposite to the snap-in 15. During the process of the ring structure being pressed together, the hook 14 can enter the snap-in 15 and snap-in on the snap-in 15. Among them, the hook 14 and the snap-in 15 are located on the midline of the tourniquet 1, and the hook 14 and the snap-in 15 are interference fit. When the tourniquet 1 is shaped into a ring structure, the hook 14 is arranged opposite to the snap-in 15. During the process of the ring structure being pressed together, the hook 14 can enter the snap-in 15 and snap-in on the snap-in 15 to avoid the rebound of the tourniquet 1 on one side of the bending portion 11 after the tourniquet 1 is fired.

[0056] Example 2

[0057] The difference between this embodiment and the first embodiment is that the structure of the anti-fall-off portion on the tourniquet 1 is different.

[0058] like Figure 5As shown, the structure of the anti-slip part is to open the second anti-slip grooves 13 arranged in two rows along the width direction on the inner side of the tourniquet 1, and the plurality of second anti-slip grooves 13 are arranged in parallel. Among them, the two rows of second anti-slip grooves 13 are arranged in parallel, and the plurality of second anti-slip grooves 13 on each row are arranged at intervals. The second anti-slip grooves 13 on the second row are arranged between the two second anti-slip grooves 13 on the first row. The second anti-slip grooves arranged in an offset manner can firmly bite the blood vessels. Of course, the second anti-slip grooves 13 can be arranged perpendicular to the edge of the tourniquet 1 extending in the length direction. In this embodiment, in order to further strengthen the anti-slip force of the tourniquet 1 when clamping the blood vessel, the second anti-slip grooves 13 are arranged in an interlaced manner, and the angle between the second anti-slip grooves 13 and the edge of the tourniquet 1 extending in the length direction is greater than or less than 90°, that is, it is inclined to the edge of the tourniquet 1 extending in the length direction.

[0059] Example 3

[0060] like Figure 6 As shown, a belt warehouse mechanism provided in this embodiment includes a sleeve 3, an actuator arranged in the sleeve 3 (the structure and working principle of the actuator have been embodied in the Chinese patent CN201911021573.1, with an application date of October 25, 2019 and a publication date of April 27, 2021. This patent is cited in its entirety and will not be repeated here), a belt feeding structure (the belt feeding structure and its working principle are the same as the push-clamp structure and its working principle disclosed in the Chinese patent CN202123129944.3, with an application date of December 13, 2021 and a publication date of June 28, 2022. They will not be repeated here), a firing structure 4, a clamp arm 2, and at least one tourniquet 1 in embodiment 1 or 2 arranged in the clamp arm 2.

[0061] Among them, the proximal end of the clamp arm is fixedly installed in the sleeve 3, the distal end of the clamp arm 2 has a hook portion 21, the hook portion 21 extends out of the sleeve 3, and a belt-containing groove 22 is opened on the clamp arm 2. The proximal end of the belt-containing groove 22 (i.e., the first end of the belt-containing groove 22) is located in the sleeve 3, and the distal end of the belt-containing groove 22 (i.e., the second end of the belt-containing groove 22) is located on the inner side of the hook portion 21 (i.e., the side of the hook portion 21 facing the sleeve 3) and is bent along the shape of the hook portion 21.

[0062] The distal end of the belt feeding structure is inserted into the sleeve 3, the belt feeding structure cooperates with the tourniquet 1, the proximal end of the belt feeding structure is inserted into the tube body 11, and the proximal end of the belt feeding structure is connected to the actuator so that the actuator drives the belt feeding structure to move in the distal and proximal directions, and is used to push the tourniquet 1 in the belt bin structure into the belt receiving groove 22 (when the actuator drives the belt feeding structure to move distally), and is used to reset the belt feeding structure to the initial state after pushing the tourniquet 1 (when the actuator drives the belt feeding structure to move proximally). When the belt feeding structure is located at the distal end position of the belt feeding, the tourniquet 1 at the farthest end is bent into a ring structure along the belt receiving groove 22, and the distal end of the tourniquet 1 at the farthest end extends out of the belt receiving groove 22.

[0063] The proximal end of the firing structure 4 is inserted into the tube body 11, and the proximal end of the firing structure 4 is connected to the actuator, so that after the belt feeding structure completes the belt feeding, the actuator drives the firing structure 4 to move in the distal direction. When the actuator drives the firing structure 4 to move far, the firing structure 4 presses the bending structure formed by the farthest tourniquet 1. When the actuator drives the firing structure 4 to move near, the actuator resets the firing structure 4 after pressing the tourniquet 1 to the initial state. Among them, the annular structure refers to any surrounding shape that can form a hollow, not just a circular ring shape.

[0064] It should be noted that the forceps arm also includes a belt compartment communicated with the belt receiving groove 22 , and the belt compartment can accommodate multiple tourniquets 1 . When the tourniquet 1 at the proximal end is fired, the tourniquet 1 at the farthest end enters the belt receiving groove 22 .

[0065] like Figure 7 As shown, in the initial state, the belt feeding structure is located at the belt feeding initial position, and the firing structure 4 is located at the firing initial position. The hook portion 21 of the clamp arm 2 in the belt storage mechanism is used to hook the blood vessel to be clamped, and then the actuator drives the belt feeding structure to move far, pushing all the tourniquets 1 in the belt storage structure to move far, pushing the farthest end of the tourniquet 1 into the belt receiving groove 22, and the belt feeding structure is located at the belt feeding termination position, and the far end of the farthest end of the tourniquet 1 is shaped along the belt receiving groove 22 and maintained into a curved structure that circumferentially embraces the blood vessel. Fig. 9 As shown, the actuator drives the firing structure 4 to move far to the firing end position, so that the distal end of the firing structure 4 presses the annular structure of the most distal tourniquet 1, so that the most distal tourniquet 1 is folded along its bending portion to clamp the blood vessel in the bending structure. The actuator drives the firing structure 4 and the belt feeding structure to reset to the initial state. During the reset process, the actuator first drives the firing structure 4 to move from the firing end position to the firing initial position, and then the actuator drives the belt feeding structure to move from the belt feeding end position to the belt feeding initial position, so that the clamped blood vessel is separated from the jaws formed by the hook portion 21.

[0066] In summary, this embodiment proposes a new idea of ​​using a tourniquet 1 in combination with a clamp arm 2 having a hook portion 21 to clamp a blood vessel. Among them, the clamp arm 2 with a hook portion 21 at the distal end is used to clamp the blood vessel. On the one hand, the hook portion 21 is easy to hook the blood vessel to be clamped, and on the other hand, the blood vessel to be clamped can be stably kept in the jaws formed by the hook portion 21. During the clamping process, the blood vessel to be clamped is not easy to slip out of the jaws, making the blood vessel clamping process stable and effective. Among them, the tourniquet 1 and the clamp arm 2 are used to clamp the blood vessel. Since the tourniquet 1 is to form a ring structure to surround the blood vessel, it is not necessary to design the tourniquet 1 into multiple sizes according to the different diameters of the blood vessel to be clamped. It is only necessary to design the hook portion 21 of the clamp arm 2 into different sizes according to the different diameters of the clamped blood vessel, which is convenient for use. Furthermore, through the introduction of the belt bin mechanism, the belt feeding structure and the firing structure 4, the tourniquet 1 and the clamp arm 2 work together to clamp the blood vessel, and the tourniquet 1 is fired continuously.

[0067] In addition, the cartridge mechanism proposed in this embodiment can adjust the clamping force applied to the blood vessel to be clamped by the firing structure 4 and the hook portion 21 of the clamp arm 2 by changing the stroke of the firing structure, so that the tourniquet 1 in the first and second embodiments can be used to clamp blood vessels of different thicknesses, without frequently replacing different types of hemostatic forceps according to the different diameters of the blood vessels to be clamped. The explanation is as follows: the blood vessel wall of a thick blood vessel is thicker, and the blood vessel wall of a thin blood vessel is thinner. In order for the cartridge mechanism to stably clamp the blood vessel, the distance between the firing structure 4 and the hook portion 21 should be less than or equal to the thickness of the two blood vessel walls of the blood vessel to be clamped.

[0068] like Figure 7 As shown, the bottom surface distal end of the band-containing groove 22 includes an arc surface 24 and a bending surface 25 connected in sequence, the arc surface 24 extends from the bottom of the hook portion 21 to the top of the hook portion 21, the direction of the arc surface 24 is consistent with the direction of the hook portion 21, the bending surface 25 is located at the top of the hook portion 21, and the direction of the bending surface 25 deviates from the direction of the hook portion 21 and is downward. In this way, by providing the arc surface 24, it is beneficial for the tourniquet 1 to bend along the direction of the hook portion 21, and by providing the bending surface 25, it is beneficial for the tourniquet 1 to bend downward to form a ring structure to wrap the blood vessel to be clamped. Further preferably, the arc surface 24 is a circular arc surface.

[0069] like Figure 10 to Figure 11 As shown, a first mounting groove 26 is provided on the left side surface at the far end of the belt receiving groove 22 and runs along the belt receiving groove 22, and a second mounting groove 27 is provided on the right side surface of the belt receiving groove 22 at a position corresponding to the first mounting groove 26, and a first clamping strip 28 is installed in the first mounting groove 26, a first side portion of the first clamping strip 28 extends into the first mounting groove 26, and a second side portion of the first clamping strip 28 extends out of the first mounting groove 26, and the first side portion of the first clamping strip 28 is connected to the bottom of the first mounting groove 26 via a first resetting member 30.

[0070] A second clip 29 is installed in the second mounting groove 27, a first side portion of the second clip 29 extends into the second mounting groove 27, a second side portion of the second clip 29 extends out of the second mounting groove 27, and the first side portion of the second clip 29 is connected to the bottom of the second mounting groove 27 via a second reset member 31; a first guide surface 32 extending from the outside of the tape receiving groove 22 to the inside of the tape receiving groove 22 is provided on the second side portion of the first clip 28, the first guide surface 32 is arranged toward the outside of the tape receiving groove 22, and the first guide surface 32 extends from the outside of the tape receiving groove 22 to the inside of the tape receiving groove 22. The first end of the first clamping strip 28 extends to the second end of the first clamping strip 28, and the second side portion of the second clamping strip 29 has a second guide surface 33 extending from the outside of the belt receiving groove 22 to the inside of the belt receiving groove 22, and the second guide surface 33 is arranged toward the outside of the belt receiving groove 22, and the second guide surface 33 extends from the first end of the second clamping strip 29 to the second end of the second clamping strip 29; a belt feeding channel for the tourniquet 1 to move forward is formed between the first clamping strip 28 and the bottom of the belt receiving groove 22, and between the second clamping strip 29 and the bottom of the belt receiving groove 22. The first reset member 30 and the second reset member 31 can be a tension spring, a compression spring, a rubber member, etc.

[0071] With such arrangement, the belt feeding channel can prevent the tourniquet 1 from being separated from the belt receiving groove 22 during the belt feeding process, and the belt feeding is stable, and at the same time, it is beneficial for the distal end of the tourniquet 1 to be stably bent along the belt receiving groove 22 to form an annular structure. In addition, in the process of the distal end of the firing structure 4 pressing the annular structure of the tourniquet 1, the firing structure 4 applies force through the tourniquet 1 to act on the first guide surface 32 and the second guide surface 33, and the first reset member 30 and the second reset member 31 yield, causing the first clamping strip 28 and the second clamping strip 29 to retract into the first mounting groove 26 and the second mounting groove 27 respectively. At this time, since the clamped tourniquet 1 and the clamped blood vessel form a large clamping overall thickness, the two side portions of the clamping overall will respectively press against the first clamping strip 28 and the second clamping strip 29, restricting the first clamping strip 28 from extending from the first mounting groove 26, and restricting the second clamping strip 29 from extending from the second mounting groove 27, so that after the firing structure 4 is reset, it is easy for the clamping overall to be released from the belt receiving groove 22.

[0072] like Figure 7 As shown, the bottom surface of the belt receiving groove 22 includes a straight surface 23, an arc surface 24 and a bent surface 25 connected in sequence. The first end of the belt feeding channel is located on the straight surface 23, and the second end of the belt feeding channel is located on the arc surface 24. When the tourniquet 1 is fed along the belt receiving groove 22, the far end of the tourniquet 1 enters the belt feeding channel, and the near end of the tourniquet 1 is pressed by the elastic pressing sheet. In this way, the feeding stability of the tourniquet 1 in the belt receiving groove 22 is further improved to prevent the mechanism from getting stuck.

[0073] Further preferably, the second side portion of the first clamping strip 28 further comprises a third guide surface 34 extending from the inside of the tape slot 22 to the outside of the tape slot 22, the third guide surface 34 is arranged toward the inside of the tape slot 22, and the third guide surface 34 extends from the first end of the first clamping strip 28 to the second end of the first clamping strip 28; the second side portion of the second clamping strip 29 further comprises a fourth guide surface 35 extending from the inside of the tape slot 22 to the outside of the tape slot 22, the fourth guide surface 35 is arranged toward the inside of the tape slot 22, and the fourth guide surface 35 extends from the first end of the second clamping strip 29 to the second end of the second clamping strip 29. By providing the third guide surface 34 and the fourth guide surface 35, it is further facilitated to release the clamped whole from the tape slot 22.

[0074] It should be noted that the number of first mounting grooves 26 can be one or more than two, and accordingly, the number of first clips 28 can be one or more than two; the number of second mounting grooves 27 can be one or more than two, and accordingly, the number of second clips 29 can be one or more than two.

[0075] like Figure 7 As shown, the firing structure 4 has a firing head 41 at the distal end for pressing the annular structure of the tourniquet 1, and the distal part of the firing head 41 has a firing surface 42 adapted to the setting of the arc surface 24; during the firing process, the firing head 41 moves far away to the hook groove of the hook portion 21. The firing head 41 configured in this way is conducive to pressing the annular structure of the tourniquet 1, and pressing the annular structure of the tourniquet 1 into a crescent shape, as shown in FIG. Fig. 9 As shown, the blood vessels can be effectively clamped.

[0076] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A belt bin mechanism, characterized in that: It comprises a tourniquet (1), a clamp arm (2) for accommodating the tourniquet (1), a belt feeding structure for pushing the tourniquet (1), and a firing structure (4) for pressing the tourniquet (1); The distal end of the clamp arm (2) has a bent portion (21), and a belt-containing groove (22) is provided on the clamp arm (2), wherein the distal end of the belt-containing groove (22) is located inside the bent portion (21) and is bent along the shape of the bent portion (21); The belt feeding structure is used to push the tourniquet (1) into the belt containing groove (22); when the belt feeding structure is located at the distal end position of the belt feeding structure, the distal end of the most distal tourniquet (1) is shaped into a ring structure along the belt containing groove (22); When the firing structure (4) fires, the firing structure (4) presses the annular structure to form a bent structure to clamp the blood vessel; The tourniquet (1) is an integrally formed belt-like structure, and the tourniquet (1) can be formed into a ring-shaped structure along an arc surface in the length direction, and the ring structure can be pressed and bent along one width direction to form a bent structure, and the bent structure comprises a bent portion and a first clamp arm (16) and a second clamp arm (17) distributed on both sides of the bent portion, and the first clamp arm (16) and the second clamp arm (17) are in the shape of an arc convex in the same direction; The bending structure is elastic and can maintain its own shape when no force is applied.

2. The belt bin mechanism according to claim 1, characterized in that: The distance between the opposing surfaces of the first clamping arm (16) and the second clamping arm (17) is 0.3-3 mm.

3. The belt bin mechanism according to claim 1, characterized in that: A plurality of anti-slip portions are arranged in sequence along the length direction of the tourniquet (1) on the side of the tourniquet (1) that contacts the blood vessel to be clamped, and each of the anti-slip portions is in the shape of a strip extending along the width direction of the tourniquet.

4. The belt bin mechanism according to claim 3, characterized in that: The anti-slip portion is structured as first anti-slip grooves (12) provided on the tourniquet (1), and the first anti-slip grooves (12) are arranged parallel to each other; or The anti-slip portion is structured as follows: second anti-slip grooves (13) are arranged in two rows in a staggered manner in the width direction on the tourniquet (1), and the second anti-slip grooves (13) are arranged parallel to each other.

5. The belt bin mechanism according to claim 4, characterized in that: The included angle between the first anti-slip groove (12) and the edge of the tourniquet (1) extending in the length direction is greater than or less than 90°; or, The included angle between the second anti-slip groove (13) and the edge of the tourniquet (1) extending along the length direction is greater than or less than 90°.

6. The belt bin mechanism according to claim 1, characterized in that: A groove extending in the width direction of the tourniquet (1) is provided in the middle of the tourniquet (1) in the length direction, and the groove is located on the side of the tourniquet (1) that contacts the blood vessel to be clamped; The annular structure is pressed and bent along the groove to form a bent structure, and the groove serves as the bent portion of the bent structure.

7. The belt bin mechanism according to claim 6, characterized in that: The cross-sectional shape of the groove is V-shaped or arc-shaped.

8. The belt bin mechanism according to claim 1, characterized in that: A clip (15) with its opening facing away is provided at the proximal end of the tourniquet (1).

9. The belt bin mechanism according to claim 8, characterized in that: A hook (14) is provided at a position at the distal end of the tourniquet (1) corresponding to the hook opening; When the tourniquet (1) is shaped into the annular structure, the hook (14) is arranged opposite to the bayonet (15); during the process of the annular structure being pressed together, the hook (14) can enter the bayonet (15) and be engaged with the bayonet (15).

10. The belt bin mechanism according to claim 1, characterized in that: The two adjacent surfaces of the tourniquet (1) are transitioned through arc surfaces.

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