Novel hemostatic clip

Abstract

The utility model provides a novel hemostatic clip. The novel hemostatic clip comprises a clip head assembly, a conveyor and a connecting assembly, the chuck assembly comprises a pair of clamping pieces and a sleeve capable of containing the folded parts of the clamping pieces. The conveyor comprises a bourdon tube, a connecting tube connected with the front end of the bourdon tube, a handle assembly connected with the rear end of the bourdon tube and a rotatable pull rod shaft penetrating through the bourdon tube, the front end of the pull rod shaft is connected with the pair of clamping pieces, and the rear end of the pull rod shaft is connected with the handle assembly; the connecting assembly comprises a connecting cylinder and a clamping spring which are sleeved with the connecting pipe, the connecting cylinder is provided with an inner cavity, and the pull rod shaft penetrates through the inner cavity of the connecting cylinder; the rear end of the connecting cylinder and the front end of the connecting pipe are locked upwards in the axial direction and can rotate relatively in the circumferential direction. The connecting cylinder is connected with the sleeve through a clamp spring, and the clamp spring deforms or is damaged to separate the connecting cylinder from the sleeve when being subjected to preset tension; the hemostatic clip disclosed by the utility model can be used for flexibly rotating the digestive tract endoscope and accurately adjusting the angle, so that a doctor can quickly and accurately adjust the angle between the clip and a focus, the focus can be better clamped and closed, the overall structure is simple, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of hemostatic clamp that can be easily separated operation. BACKGROUND

[0002] In clinical medicine, digestive tract system often due to disease, accidental injury and the damage of treatment process can cause the phenomenon of digestive tract hemorrhage. The current commonly used hemostasis method has injection, spraying drug, high-frequency electrocoagulation, laser, argon gas burning and using hemostatic clamp to close the bleeding position to carry out hemostasis. Among them, using hemostatic clamp to close the bleeding position to carry out hemostasis has become the most effective, most clinical application value method for non-surgical treatment of digestive tract hemorrhage because of its small trauma, fast hemostasis speed, low rebleeding rate, fewer complications and definite curative effect. Hemostatic clamp can also close the mucosa injury of digestive tract to a certain extent, promote its wound healing, and close the small fistula of digestive tract, avoid laparotomy.

[0003] Because hemostatic clamp is sent to lesion by 1-2 meters soft endoscope into organism, endoscope will be bent in organism for many times, and existing hemostatic clamp cannot accurately adjust the angle of clamp. Fast, accurate and flexible adjustment of the angle of hemostatic clamp is very important for closing the lesion of digestive tract of organism, and is also urgently needed by doctors in actual operation

[0004] In order to solve the above problems, the utility model designs a novel hemostatic clamp, which can accurately and quickly rotate the clamp relative to the rear end of the conveyor, and has simple structure and reduced cost. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a novel hemostatic clamp which can be used for flexible rotation and accurate angle adjustment of digestive tract endoscope, and has simple overall structure and reduced cost.

[0006] According to one aspect of the utility model, a novel hemostatic clamp is provided, which comprises a chuck assembly, a conveyor and a connecting assembly. The chuck assembly comprises a pair of clamping pieces and a sleeve in which the clamping pieces can be stored when they are closed. The conveyor comprises a spring tube, a connecting tube connected to the front end of the spring tube, a handle assembly connected to the rear end of the spring tube, and a rotatable pull rod shaft penetrating the inside of the spring tube. The front end of the pull rod shaft is connected to the pair of clamping pieces, and the rear end of the pull rod shaft is connected to the handle assembly. The connecting assembly comprises a connecting cylinder sleeved in the connecting tube and a snap spring. The connecting cylinder is provided with an inner cavity, and the pull rod shaft penetrates the inner cavity of the connecting cylinder. The rear end of the connecting cylinder is axially locked with the front end of the connecting tube, and the connecting cylinder and the sleeve can rotate relative to each other in the circumferential direction. The connecting cylinder and the sleeve are connected by the snap spring. When the snap spring is subjected to a predetermined pulling force, it deforms or breaks to separate the connecting cylinder and the sleeve.

[0007] Preferably, the clamping spring has an abutting portion and at least one side arm, the rear end of the side arm is connected with the abutting portion, the pull rod shaft penetrates the abutting portion and is connected with the pair of clamping pieces, the front end of the side arm of the clamping spring is connected with the front end of the connecting cylinder and the rear end of the sleeve, and the rear movement of the pull rod shaft makes the front end of the side arm of the clamping spring out of the front end of the connecting cylinder and the rear end of the sleeve.

[0008] Preferably, the front end of the connecting cylinder is provided with at least one connecting hole and the outer rear end is provided with a fixing step, the rear end of the sleeve is provided with a sleeve hole corresponding to the connecting hole, the front end of the inner side of the connecting pipe is provided with a first protrusion matched with the fixing step, so that the connecting cylinder and the connecting pipe can relatively rotate; the front end of the side arm of the clamping spring is correspondingly clamped into the connecting hole and the sleeve hole.

[0009] Preferably, the front end of the connecting cylinder is sleeved on the rear end of the sleeve.

[0010] Preferably, the front end of the connecting cylinder is provided with at least one groove, and the grooves are circumferentially spaced apart from the connecting holes.

[0011] Preferably, the front end of the pull rod shaft is provided with a pulling head, the pull rod shaft is connected with the pair of clamping pieces through the pulling head, and the end of the pulling head is provided with a notch.

[0012] Preferably, when the pull rod shaft moves rearward to make the pulling head contact the abutting portion of the clamping spring, the pulling head drives the clamping spring to move rearward to make the front end of the side arm of the clamping spring out of the connecting cylinder and the sleeve.

[0013] Preferably, the front end of the sleeve is provided with a radially extending blocking shaft, and the blocking shaft penetrates between the pair of clamping pieces; when entering and exiting the sleeve, the pair of clamping pieces is switched between the closed and open states.

[0014] Preferably, a connecting shaft is further included, the pulling head is connected with the pair of clamping pieces through the connecting shaft; the handle assembly includes a handle rod and a handle, the handle is sleeved on the handle rod and is in sliding fit with the handle rod, the pull rod shaft is connected with the handle through the handle rod, and the rear end of the spring pipe is connected with the handle rod.

[0015] Preferably, the rear end of each of the two clamping pieces is provided with an outwardly protruding tail hook; the rear end of the sleeve is internally provided with two radially extending second protrusions for stopping the tail hooks; the second protrusions are located on the front side of the sleeve hole; and the tail hooks are matched with the second protrusions.

[0016] The hemostatic clamp can be used for flexible rotation and accurate angle adjustment of a digestive tract endoscope, so that a doctor can rapidly and accurately adjust the angle between the clamp and a lesion, better clamp and close the lesion, and the overall structure is simple and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model scheme;

[0018] Figure 2 It is a structure schematic view of the proximal end of the hemostatic clamp;

[0019] Figure 3 It is a structure schematic view of the distal end of the hemostatic clamp;

[0020] Figure 4 It is a structure schematic view of the sleeve and the connecting pipe connection;

[0021] Figure 5 It is an embodiment view of the pull rod shaft;

[0022] Figure 6 It is a state view of the clamp closing;

[0023] Figure 7 It is a structure schematic view of the snap spring. DETAILED DESCRIPTION

[0024] In order to facilitate understanding of the present application, so that the above-mentioned purposes, features and advantages of the present application can be more obvious and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the present application, and the preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. The present application can be implemented in many different ways from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0025] Furthermore, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second" can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise explicitly and specifically limited. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used herein are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] In this paper, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements.

[0027] For the convenience of description, in this specification, the spring tube is defined as the distal end, that is, the front end, away from the operator along its length direction in use, and the end held by the operator is the proximal end, that is, the rear end.

[0028] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings of the specification.

[0029] As Figures 1-7As shown, the new hemostatic clip of the present embodiment 1 comprises: a handle assembly 4 comprising a handle rod 41 and a handle 42, the handle 42 being sleeved on the handle rod 41 and axially slidingly fitted with the handle rod 41; a delivery device 2 comprising a spring tube 21, a connecting tube 22 connected with the front end of the spring tube 21, the handle rod 41 connected with the rear end of the spring tube 21, a pull rod shaft 23 penetrating through the inside of the spring tube 21 and being rotatable, the front end of the pull rod shaft 23 being connected with a pair of clamping pieces 11, the rear end of the pull rod shaft 23 being connected with the handle assembly 4, specifically, the front end of the pull rod shaft 23 is provided with a pulling head 231, the pull rod shaft 23 is connected with the pair of clamping pieces 11 through the pulling head 231, and the end of the pulling head 231 is provided with a notch 2311; the rear end of the pull rod shaft 23 is connected with the handle 42 through the handle rod 41; a clamping head assembly 1 comprising the pair of clamping pieces 11 and a sleeve 12 capable of partially storing the clamping pieces 11; a connecting shaft 5, the pulling head 231 being connected with the pair of clamping pieces 11 through the connecting shaft 5. The end of the sleeve 12 is provided with a radially extending blocking shaft 122, the clamping pieces 11 are located in the sleeve 12, the blocking shaft 34 penetrates between the two clamping pieces, and the two clamping pieces are converted between the closed and opened states when entering and exiting the sleeve 12; the connecting assembly comprises a connecting cylinder 31 sleeved in the connecting tube 22 and a snap spring 32, the connecting cylinder 31 is provided with an inner cavity, and the pull rod shaft 23 penetrates through the inner cavity of the connecting cylinder 31; the rear end of the connecting cylinder 31 is axially locked with the front end of the connecting tube 22 and can relatively rotate in the circumferential direction; the connecting cylinder 31 and the sleeve 12 are connected through the snap spring 32, and the snap spring 32 is deformed or broken when subjected to a predetermined pulling force to separate the connecting cylinder 31 and the sleeve 12. Specifically, the snap spring 32 has an abutting portion 321 and at least one side arm 322, the rear end of the side arm 322 is connected with the abutting portion 321, preferably two side arms 322, the pull rod shaft 23 penetrates the abutting portion 321 and is connected with the pair of clamping pieces 11, the front end of the side arm 322 of the snap spring 32 is connected with the front end of the connecting cylinder 31 and the rear end of the sleeve 12, and the rear movement of the pull rod shaft 23 makes the front end of the side arm 322 of the snap spring 32 out of the front end of the connecting cylinder 31 and the rear end of the sleeve 12. Specifically, the front end of the connecting cylinder 31 is provided with at least one connecting hole 311 and the outside rear end is provided with a fixed step 312, preferably two connecting holes 311, the rear end of the sleeve 12 is provided with a sleeve hole 121 corresponding to the connecting hole 311, and the front end of the inside of the connecting tube 22 is provided with a first protrusion 221 matched with the fixed step 312, so that the connecting cylinder 31 and the connecting tube 22 can relatively rotate; the front end of the side arm 322 of the snap spring 32 is correspondingly clamped into the connecting hole 311 and the sleeve hole 121. The rear end of the two clamping pieces 11 is respectively provided with an outwardly protruding tail hook 111; the inside of the rear end of the sleeve 12 is provided with two radially extending second protrusions 123 for stopping the tail hook 111; the second protrusion 123 is located on the front side of the sleeve hole 121; the tail hook 111 cooperates with the second protrusion 123 for locking the clamping pieces.

[0030] The action process of the hemostatic clip of the embodiment is as follows: the handle 42 can slide along the handle rod 41. The handle 42 is pulled to transmit the pulling force to the clip head assembly 1 through the pull rod shaft 23. The clamping pieces 11 are retracted into the sleeve 12 under the action of the pulling force, and the two clamping pieces are closed. The handle 42 is pushed to transmit the pushing force to the clip head assembly 1 through the pull rod shaft 23; the two clamping pieces 11 in the clip head assembly 1 are separated by the blocking shaft 122 to realize the opening of the clamping pieces, and the angle of opening of the two clamping pieces is increased. When the clip head assembly 1 needs to be rotated, the handle assembly 4 is only rotated to drive the pull rod shaft 23 to rotate, and then the torque is transmitted to the clamping pieces 11 and the sleeve 12 to drive the sleeve 12 to rotate, so that the clip head assembly 1 is accurately rotated. The handle 42 is continuously pulled, the tail hook 111 at the tail end of the clamping piece 11 continuously retracts under the action of the pulling force, and the tail hook 111 enters the necked portion of the sleeve 12 until the tail hook 111 is stopped at the second protrusion 123, so that the locking function of the clip head is realized. Before being locked, the clamping piece 11 can be repeatedly pulled in and out of the sleeve 12 through the push-pull of the pull rod shaft 23, that is, the repeated opening and closing of the clamping piece can be realized. When the handle 42 is continuously pulled, the pull rod shaft 23 is separated from the connecting shaft 5 at the gap 2311 under the action of the pulling force, the pull rod shaft 23 is continuously pulled, the pulling head 231 contacts the abutting portion 321 of the snap spring 32 when the pull rod shaft 23 moves backward, the handle 42 is continuously pulled to drive the snap spring 32 to move backward, and then the front end of the side arm 322 of the snap spring 32 is pulled out of the connecting barrel 31 and the sleeve 12 to be straightened and fall off, that is, the separation of the sleeve 12 and the connecting barrel 31 is realized.

[0031] Specifically, the front end of the connecting barrel 31 is sleeved on the rear end of the sleeve 12, the structure is simple, the length of the clip head is shortened, the cost is reduced, and the functions that can be realized by multiple components in the existing structure are omitted; the front end of the connecting barrel 31 is provided with at least one groove 313, the groove 313 and the connecting hole 311 are arranged at intervals in the circumferential direction of the connecting barrel 12, and the front end of the connecting barrel 31 and the second protrusion 123 at the rear end of the sleeve 12 can be prevented from interfering, so that the rotation function of the hemostatic clip is smooth.

[0032] The connecting barrel 31 is used for connecting the connecting pipe 22 and the sleeve 12 and enabling the connecting pipe 22 and the sleeve 12 to rotate relative to each other in the circumferential direction, the overall structure is simple, the operation is convenient, the connecting pipe 22 and the sleeve 12 can rotate by 360°, the clamping piece 11 can be pulled in and out of the sleeve 12 through the pull rod shaft 23, and the opening and closing of the clamping piece 11 can be realized multiple times.

[0033] As Figures 1-7As shown, the pull rod shaft 23 is connected by a main body section, a pull rod shaft connecting pipe and a pull rod head 231. The front end of the pull rod shaft 23 is provided with the pull rod head 231, and the end of the pull rod head 231 is provided with a notch 2311. The pull rod shaft 23 is connected with a pair of clamping pieces 11 through the pull rod head 231 and the connecting shaft 5. The pull rod shaft 23 is in a flat strip shape. The main body section is connected with the handle 42 through the spring pipe 21. The handle 42 can be pushed and pulled, and can also be rotated through the handle 42 and the handle rod 41. The structure of the pull rod shaft 23 is not limited to this. Pulling the handle 42, the end of the pull rod shaft 23 has a notch 2311, and then the pull rod shaft 23 is detached from the connecting shaft 5 through the notch 2311. The pull rod shaft connecting pipe can axially move through the abutting portion of the snap spring. When the pull rod shaft 23 moves backward, the pull rod head 231 contacts the abutting portion 321 of the snap spring 32. Continuing to pull the handle 42 will drive the snap spring 32 to move backward, and then the front end of the side arm of the snap spring 32 is straightened out of the corresponding connecting hole and the sleeve hole, so as to separate the sleeve 12 from the connecting cylinder 31.

[0034] The rear end of each of the two clamping pieces 11 is provided with an outwardly protruding tail hook 111 in the embodiment. The inner rear end of the sleeve 12 is provided with two radially extending second protrusions 123 for stopping the tail hook 111. The tail hook 111 cooperates with the second protrusion 123 to lock the two clamping pieces 11 in the sleeve 12, so as to realize the locking function of the clamping pieces. Before being locked, the two clamping pieces 11 can be repeatedly pushed in and out of the sleeve 12 through the push and pull of the pull rod shaft 23, so as to realize the repeated opening and closing of the clamping pieces.

[0035] In order to facilitate the disengagement of the chuck assembly, the end of the pull rod shaft 23 is connected with the two clamping pieces 11 through the connecting shaft 5 in the embodiment. The pull rod shaft 23 has a notch 2311 on the hole wall of the connecting shaft 5, and can be detached from the connecting shaft 5 under the action of tension. The chuck assembly 1 includes two clamping pieces 11 in the embodiment, and the blocking shaft 122 is arranged between the two clamping pieces 11. When entering and exiting the sleeve 12, the two clamping pieces 11 are converted between the closed and open states. Pulling the handle 42 transmits tension to the clamping pieces 11 through the pull rod shaft 23, and the clamping pieces 11 shrink into the sleeve 12 under the action of tension, so as to close the two clamping pieces 11. Pushing the handle 42 transmits thrust to the clamping pieces 11 through the pull rod shaft 23. The clamping pieces 11 are separated by the blocking shaft 122 to open the two clamping pieces, and the angle of opening of the clamping pieces is increased. Specifically, one end of the clamping piece 11 is bent to form a clamping portion, and the other end of the clamping piece 11 has a connecting portion with a clamping piece connecting hole 111. The two clamping pieces 11 are connected through the connecting shaft 5 arranged in the clamping piece connecting hole 111.

[0036] As will be apparent to those of ordinary skill in the art, various modifications and variations can be made to the above-described exemplary embodiments of the present application without departing from the spirit and scope of the present application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A novel hemostatic clip, characterized in that, The utility model relates to a kind of connecting device, including chuck assembly (1), conveyor (2) and connecting assembly; The chuck assembly (1) includes a pair of clamping pieces (11) and a sleeve (12) that can partially store the clamping pieces (11) therein. The conveyor (2) includes a spring tube (21), a connecting tube (22) connected to the front end of the spring tube (21), a handle assembly (4) connected to the rear end of the spring tube (21), a pull rod shaft (23) penetrating the inside of the spring tube (21) and being rotatable, the front end of the pull rod shaft (23) being connected to the pair of clamping pieces (11), and the rear end of the pull rod shaft (23) being connected to the handle assembly (4). The connecting assembly includes a connecting cylinder (31) and a circlip (32) sleeved in the connecting tube (22), the connecting cylinder (31) is provided with an inner cavity, the pull rod shaft (23) penetrates through the inner cavity of the connecting cylinder (31), the rear end of the connecting cylinder (31) is axially locked with the front end of the connecting tube and can be relatively rotated in the circumferential direction, the connecting cylinder (31) is connected to the sleeve (12) through the circlip (32), and the circlip (32) is deformed or broken when subjected to a predetermined pulling force to separate the connecting cylinder (31) from the sleeve (12).

2. The novel hemostatic clip of claim 1, wherein: The circlip (32) has an abutting portion (321) and at least one side arm (322), the rear end of the side arm (322) is connected to the abutting portion (321), the pull rod shaft (23) penetrates the abutting portion (321) and is connected to the pair of clamping pieces (11), the front end of the side arm (322) of the circlip (32) is connected to the front end of the connecting cylinder (31) and the rear end of the sleeve (12), and the rearward movement of the pull rod shaft (23) causes the front end of the side arm (322) of the circlip (32) to be detached from the front end of the connecting cylinder (31) and the rear end of the sleeve (12).

3. The novel hemostatic clip of claim 2, wherein: The front end of the connecting cylinder (31) is provided with at least one connecting hole (311) and the outside rear end is provided with a fixed step (312), the rear end of the sleeve (12) is provided with a sleeve hole (121) corresponding to the connecting hole (311), and the front end of the inside of the connecting tube (22) is provided with a first protrusion (221) matched with the fixed step (312), so that the connecting cylinder (31) and the connecting tube (22) can be relatively rotated; the front end of the side arm (322) of the circlip (32) is correspondingly clamped into the connecting hole (311) and the sleeve hole (121).

4. The novel hemostatic clip of claim 3, wherein: The front end of the connecting cylinder (31) is sleeved on the rear end of the sleeve (12).

5. The novel hemostatic clip of claim 3, wherein: The front end of the connecting cylinder (31) is provided with at least one groove (313), and the groove (313) is circumferentially spaced from the connecting hole (311).

6. The novel hemostatic clip of claim 4, wherein: The front end of the pull rod shaft (23) is provided with a pulling head (231), the pull rod shaft (23) is connected to the pair of clamping pieces (11) through the pulling head (231), and the end of the pulling head (231) is provided with a notch (2311).

7. The novel hemostatic clip of claim 6, wherein: When the pull rod shaft (23) moves backward to make the pulling head (231) contact with the abutting part (321) of the snap spring (32), the pulling head (231) drives the snap spring (32) to move backward to make the front end of the side arm (322) of the snap spring (32) out of the connecting barrel (31) and the sleeve (12).

8. The novel hemostatic clip of claim 7, wherein: The front end of the sleeve (12) is provided with a radially extending blocking shaft (122), and the blocking shaft (122) is arranged between the pair of clamping pieces (11); when the sleeve (12) is opened and closed, the pair of clamping pieces (11) are switched between the closed and open states.

9. The novel hemostatic clip of claim 7, wherein: The connecting shaft (5) is further included, the pulling head (231) is connected with the pair of clamping pieces (11) through the connecting shaft (5); the handle assembly (4) includes a handle rod (41) and a handle (42), the handle (42) is sleeved on the handle rod (41) and is in sliding fit with the handle rod (41), the pull rod shaft (23) is connected with the handle (42) through the handle rod (41), and the rear end of the spring pipe (21) is connected with the handle rod (41).

10. The novel hemostatic clamp of claim 3, wherein: The rear end of the two clamping pieces (11) is respectively provided with an outwardly protruding tail hook (111); the rear end of the sleeve (12) is internally provided with two radially extending second protrusions (123) for stopping the tail hook (111); the second protrusions (123) are located on the front side of the sleeve hole (121); and the tail hook (111) is matched with the second protrusions (123).

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