CN114224423A

CN114224423A - Hemostatic clamp and clamping head thereof

Info

Publication number: CN114224423A
Application number: CN202111555166.6A
Authority: CN
Inventors: 完颜宏涛; 张融南
Original assignee: Anrei Medical HZ Co Ltd
Current assignee: Anrei Medical HZ Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-03-25

Abstract

The invention discloses a hemostatic clamp and a clamping head thereof, wherein the clamping head comprises two clamping arm parts for clamping tissues and an elastic connecting part for endowing the two clamping arm parts with clamping tendency, the front ends of the clamping arm parts are claw ends, the elastic connecting part is arranged between the two clamping arm parts, and the rear ends of the clamping arm parts can be clamped by the two clamping arms. The clamping head of the hemostatic clamp is in a clamping state in a conventional state, a tubular part is not needed to draw in the locking clamp, the residual parts are few and small in size, a hook is not needed during release, the structure is simpler, the operation is more convenient, the clamping and locking are firm and reliable, and the tissue is prevented from loosening or slipping after being clamped.

Description

Hemostatic clamp and clamping head thereof

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a releasable connecting rod structure hemostatic clamp and a clamping head thereof.

Background

With the development of endoscopic technology and other related technologies, endoscopic hemostasis has become the first choice treatment method for the treatment of digestive tract hemorrhage. The currently commonly used endoscopic hemostasis methods include laser coagulation, electric coagulation, local injection of drugs to stop bleeding, drug spraying, and hemostatic clamp. Among them, the hemostatic clamp method has become the most effective and clinically applicable method for non-operative treatment of gastrointestinal hemorrhage due to its characteristics of small trauma, rapid hemostasis, low incidence of recurrent bleeding, few complications, and definite therapeutic effect.

The hemostatic clamp apparatus commonly used in the prior art mainly comprises two clamping pieces which realize a closing function through a hook structure and a sliding groove structure, for example:

patent document CN104023654A discloses a hemostatic clamp, comprising: a jig main body formed by bending an intermediate portion of a band-shaped member; and a push tube. The above-mentioned anchor clamps main part includes: a first member formed of a first metal material capable of elastic deformation; and a pair of second members formed of a second metal material having a smaller elastic strain limit than the first metal material and connected to both end portions of the first member, respectively. The push pipe changes an opening width of the jig main body by accommodating a part of the jig main body in the push pipe.

Patent document No. CN205322412U discloses a controllable drop-off hemostatic clamp, which comprises a hemostatic clamp part and a hemostatic clamp conveying part, wherein the hemostatic clamp part is used for clamping and closing bleeding human tissues and retaining human bodies; the hemostatic clamp conveying part is used for conveying and operating the hemostatic clamp part. The hemostasis part comprises a cross-shaped clamping piece, a tightening pipe made of degradable materials and a locking pipe made of non-degradable materials; the rear end of the tightening pipe is connected with the front end of the locking pipe, and the clamping pieces can extend out and retract in the tightening pipe and the locking pipe. The tightening tube is made of degradable material, the clamping piece is not tightened after degradation, and the clamping force can be lost, so that the hemostatic clamp part is automatically separated from the human tissue to fall off and is discharged out of the body along with the natural digestive tract of the human body. The locking pipe is made of non-degradable materials, and can still keep the clamping piece incompletely opened, so that the parts of the hemostatic clamp are prevented from being too dispersed after being disintegrated. The clamping piece is made of stainless steel or nickel-titanium alloy and other materials, so that good strength and elasticity are provided, and the hemostatic clamp can provide reliable and strong clamping in a preset working period.

Patent document No. CN102727276A discloses a tissue hemostatic clamping device, which comprises a clip, a release mechanism, a traction assembly, a handle assembly and an outer sheath tube; the clip includes: a clip; the connecting piece is fixedly connected with the push-pull end of the clamping piece into a whole; the push-pull end of the clamping piece and the connecting piece can slide back and forth in the tightening pipe; the connecting piece is buckled and fixed with the tightening pipe through the anti-loosening structure; a stop block is fixedly arranged at the front part of the tightening pipe, and a clamping arm of the clamping piece is provided with a closing stop point; the release mechanism includes: the front part of the push-pull pipe is connected with the connecting piece in a connection mode capable of losing efficacy when bearing more than preset tension, and the rear part of the push-pull pipe is fixedly connected with a traction steel wire; the front part of the connecting pipe is connected with the rear part of the tightening pipe through a movable buckle, and the rear part of the connecting pipe is fixedly connected with the sheath hose; the push-pull pipe enables the connecting pipe and the tightening pipe to be connected in a loose-joint mode through the release structure.

Patent document No. CN203828993U discloses a hemostatic clip, which comprises a clipping component and a clip seat, wherein the clipping component comprises a clip body and a steel wire buckle which are connected in sequence; the clamp comprises a clamp seat, a clamp body and a movable pin shaft, wherein the front end of the clamp seat is provided with the fixed pin shaft, the clamp body is composed of two clamping arms, the tail ends of the two clamping arms are connected through the movable pin shaft, the middle parts of the two clamping arms are respectively provided with a sliding groove, the fixed pin shaft penetrates through the sliding grooves, and the two clamping arms reciprocate along the sliding grooves to form the opening and closing of the clamp body; the tail end of the sliding groove is provided with a bending structure, and when the clamping arms move to enable the fixed pin shaft to be located in the bending structure, the two clamping arms are located at a locking closing position.

Above-mentioned these hemostatic clamps all have longer residue after the release, and the chuck part in the human body of reseing is not only that the part is many but also length is longer, can influence operator's the field of vision when the operation, also can influence the position of second hemostatic clamp simultaneously, has one row of longer hemostatic clamps of remaining along with the wriggling of alimentary canal after the operation is accomplished, consequently has the risk that the hemostatic clamp drops in advance, influences the purpose of hemostasis to the operation wound.

In the prior art, there is also a hemostatic clamp which uses a link structure to close a clamping piece, for example, patent document CN102626335 discloses a hemostatic clamp with a four-link structure, which includes a chuck part, an outer tube part, a pulling cable and a handle, wherein the pulling cable is connected to the handle through a sliding ring, the outer tube part is fixedly connected to the handle, the chuck part is composed of two chucks and two links, the chuck handle and the links of the chuck form a four-link structure, the two chucks are pinned to a chuck base, the chuck base is connected to the outer tube part, the two links are pinned to a pulling rod arranged at the front end of the pulling cable, the hemostatic clamp pulls the pulling cable to move back and forth through the sliding of the sliding ring on the handle, and the pulling rod drives the four-link structure to move, thereby closing and opening the chucks. The outer pipe part consists of an outer pipe, a connecting sleeve, a connecting core and a connecting seat, wherein the connecting sleeve, the connecting core and the connecting seat are arranged in the outer pipe, the connecting sleeve is arranged at the front end, the assembling part of the chuck seat is arranged in the connecting sleeve, the connecting sleeve and the connecting seat are tightly connected together through the connecting core, and the connecting core is suitable for being pushed by a backward pull rod to be separated from the connecting sleeve. However, the chuck member also has a long residual end, and the chuck member cannot rotate.

In addition, in the prior art, the tubular part is adopted to draw the clamping pieces or the clips to realize clamping and locking, so that the clamping and locking are easy to be not firm enough, tissues are easy to slip, the hook is adopted to realize the release of the clamping head part, the structure is complex, the operation is inconvenient, and the release is easy to fail.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a hemostatic clamp and a clamp head thereof, wherein the clamp head is in a clamping state under a conventional state, a tubular part is not needed to fold and lock the clamp, the number of residual parts is small, the volume is small, a hook is not needed during release, the structure is simpler, the operation is more convenient, the clamping and locking are firm and reliable, and the tissue is prevented from loosening or slipping after being clamped.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a chuck of hemostatic clamp, is used for two arms of centre gripping tissue and is used for giving two arms of centre gripping elasticity connecting portion of tendency of closing, and the front end of arm of centre gripping is the claw end, and elasticity connecting portion sets up between two arms of centre gripping, and the rear end of arm of centre gripping can be held by two arm lock (20). In this way, the clamping force is applied to the rear ends of the two clamping arm parts through the two clamping arms to overcome the elastic force of the elastic connecting part, so that the front ends of the two clamping arm parts can be opened, namely the clamping head is opened; when the two clamping arms do not apply clamping force to the rear ends of the two clamping arm parts, the front ends of the two clamping arm parts are closed, namely the clamping heads are clamped; when the opening amplitude of the two clamping arms is larger than the rear ends of the two clamping arm parts, the two clamping arms can be separated, namely the clamping head can be released. Like this, adopt the chuck of clamping closure under the normality, utilize the part material to provide clamping-force, the few small of residual part, the centre gripping is firm more reliable, and release structure is also simpler, and spare part is still less, and it is more convenient to operate. And after the clamping head is released, the hemostatic clamp can be repeatedly operated and utilized by reinstalling the clamping head, so that the use cost can be effectively reduced.

Preferably, the clamping arms are clamping pieces (10), the elastic connecting part is an elastic piece (11) with a deformable opening, the deformable opening of the elastic piece (11) is arranged backwards, and two ends of the elastic piece (11) are respectively fixedly connected with the rear parts of the two clamping pieces (10); when the rear parts of the two clamping pieces (10) are subjected to extrusion acting force, the deformable opening of the elastic piece (11) is reduced or closed, so that the front ends of the two clamping pieces (10) are driven to open; when the rear parts of the two clamping pieces (10) are not subjected to external force, the front ends of the two clamping pieces (10) are automatically closed under the elastic tension condition of the elastic sheet (11).

Preferably, both ends of the elastic sheet (11) are respectively welded and fixed with the rear parts of the two clamping sheets (10).

Preferably, the elastic sheet (11) is made of a nickel-titanium alloy material.

Preferably, the two clamping arm parts are hinged to each other, and the elastic connecting part is a spring or an elastic sheet.

A hemostatic clamp comprises a clamping head of the hemostatic clamp, a mandrel, a spring hose (80) and a clamping head seat (50), wherein the mandrel is arranged in the spring hose (80) in a penetrating mode, the far end of the spring hose (80) is connected with the clamping head seat (50), the far end of the mandrel is connected with two clamping arms (20) through connecting pieces, and the two clamping arms (20) are arranged on the clamping head seat (50) in a hinged mode and are connected with the clamping head in a releasable mode.

Preferably, the rear ends of the two clamping arm parts of the chuck are installed and accommodated in an included angle space formed by the two clamping arms (20) and are in contact fit with the two clamping arms (20) through the elastic tension of the elastic connecting part; the rear portion of chuck is equipped with the notch, the front portion of arm lock (20) be equipped with be used for with notch complex arch (201).

Preferably, the clamping arm (20) is hinged with the chuck seat (50) through a pin (21), the clamping arm (20) comprises a front arm part positioned in front of the hinged position of the clamping arm and a rear arm part positioned behind the hinged position of the clamping arm, the included angle space for accommodating the rear end of the chuck is formed between the front arm parts of the two clamping arms (20), and the rear arm part is connected with the mandrel through a connecting piece.

Preferably, the connecting piece comprises a push-pull rod (60) and two connecting pieces, the front ends of the two connecting pieces are respectively hinged with the two clamping arms (20), the rear ends of the two connecting pieces are hinged with the front end of the push-pull rod (60), so that the two clamping arms (20) and the two connecting pieces form a four-bar mechanism, and the rear end of the push-pull rod (60) is fixedly connected with the far end of the mandrel.

Preferably, the chuck seat (50) is connected with the spring hose (80) through a rotating seat (70), a fixed seat (71) and a rotating cylinder (72), the fixed seat (71) is fixedly connected with the far end of the spring hose (80), the rotating seat (70) and the fixed seat (71) are respectively sleeved on the rotating cylinder (72), the rotating seat (70) is connected with the rotating cylinder (72) in a manner of relative rotation and axial limiting, the rotating cylinder (72) is fixedly connected with the fixed seat (71), and the rear part of the chuck seat (50) is fixedly connected with the rotating seat (70). Therefore, the mandrel drives the clamping arm (20) and the clamping head seat to rotate through the push-pull rod so as to drive the clamping head to rotate, and the clamping head is simple in structure and convenient and reliable to operate.

By adopting the technical scheme, the clamping head is in a clamping state in a conventional state, a tubular part is not needed to fold and lock the clamp, the number of residual parts is small, the size is small, a hook is not needed during release, the structure is simpler, the operation is more convenient, the clamping and locking are firm and reliable, the tissues are prevented from loosening or slipping after being clamped and closed, the clamping head is safe and reliable, the manufacturing cost is low, and complex structures such as a hook, a sliding groove and the like in the prior art are effectively avoided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is an exploded view of example 1;

FIG. 2 is an open schematic view (partially in section) of the cartridge in embodiment 1;

FIG. 3 is an open schematic view (profile) of the cartridge in example 1;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a close-up schematic view (partially in section) of the cartridge of example 1;

FIG. 6 is a schematic closed view (outline) of the cartridge in example 1;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a schematic view (profile) of the release of the cartridge in example 1;

FIG. 9 is an open schematic view (partially in section) of the cartridge in embodiment 1;

fig. 10 is a schematic structural view of the elastic sheet in embodiment 1;

FIG. 11 is a schematic view showing the structure of a clip in example 1;

FIG. 12 is a schematic view of the structure of a clip arm in embodiment 1;

FIG. 13 is an exploded view of example 2;

FIG. 14 is an open schematic view (partially in section) of the cartridge in embodiment 2;

FIG. 15 is an open schematic view (profile) of the cartridge in example 2;

FIG. 16 is a top view of FIG. 15;

FIG. 17 is a schematic close-up view (in partial section) of the cartridge of example 2;

FIG. 18 is a schematic closed view (outline) of the cartridge in example 2;

FIG. 19 is a top view of FIG. 18;

FIG. 20 is a schematic release view (partially in section) of the cartridge in embodiment 2;

FIG. 21 is a schematic view of the clip arm in example 2.

10, a clamping piece; 101. a first notch; 11. a spring plate; 111. a second notch; 20. clamping arms; 201. a protrusion; 21. a pin; 30. a single-column connecting sheet; 40. a double-column connecting sheet; 50. a chuck base; 60. a push-pull rod; 70. a rotating base; 71. a fixed seat; 72. a rotary drum; 80. a spring hose.

Detailed Description

The invention is further described with reference to the following figures and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, the singular is also intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the features, steps, operations, devices, components, and/or combinations thereof.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1:

a hemostatic clamp as shown in fig. 1, which comprises a handle, a sliding handle, a mandrel, a spring hose 80, a collet and a collet seat 50, wherein the mandrel is inserted into the spring hose 80, the proximal end of the spring hose 80 is connected with the handle, the distal end of the spring hose 80 is connected with the collet seat 50, the proximal end of the mandrel is connected with the sliding handle, the distal end of the mandrel is connected with two clamping arms 20 through a connector, and the two clamping arms 20 are hinged on the collet seat 50 and are connected with the collet in a releasable manner.

In this embodiment, the chuck adopts a releasable structure: the clamping head comprises two clamping arm parts for clamping tissues and an elastic connecting part for endowing the two clamping arm parts with clamping tendency, the front ends of the clamping arm parts are claw ends, the elastic connecting part is arranged between the two clamping arm parts, and the rear ends of the clamping arm parts can be clamped by the two clamping arms 20. In this way, the clamping force is applied to the rear ends of the two clamping arms 20 by the two clamping arms to overcome the elastic force of the elastic connecting part, so that the front ends of the two clamping arms can be opened, namely the chuck is opened; when the two clamping arms 20 do not apply clamping force to the rear ends of the two clamping arm parts, the front ends of the two clamping arm parts are closed, namely the clamping heads are clamped; when the opening of the two arms 20 is greater than the rear ends of the two gripper arms, the two arms can be separated, i.e., the collet can be released. Like this, adopt the chuck of clamping closure under the normality, utilize the part material to provide clamping-force, the centre gripping is firm more reliable, and release structure is also simpler, spare part still less, and it is more convenient to operate. And after the clamping head is released, the hemostatic clamp can be repeatedly operated and utilized by reinstalling the clamping head, so that the use cost can be effectively reduced.

As shown in fig. 1, 2 and 3, in the present embodiment, preferably, the clamping arm portions are clamping pieces 10, the elastic connection portion is a resilient strip 11 having a certain deformation angle (V-shaped), a V-shaped opening of the resilient strip 11 is disposed rearward, when the resilient strip 11 is subjected to an extrusion force, an opening portion of the resilient strip 11 is completely closed to drive the two clamping pieces 10 to synchronously open and form an opening spoke with a larger angle, two ends of the resilient strip 11 are respectively welded and fixed to rear portions of the two clamping pieces 10, and when no external force is applied to the rear portions of the two clamping pieces 10, the two clamping pieces 10 are automatically closed (approximately a-shaped) under an elastic tension of the resilient strip 11, that is, the chuck is clamped in a normal state.

In other embodiments, the chuck may also adopt two clamping arms hinged to each other, and the elastic connection portion is an elastic member such as a spring, a spring sheet, or the like.

In this embodiment, preferably, the elastic sheet 11 is made of a nickel-titanium alloy material. In other embodiments, other materials with better elasticity and biocompatibility can be selected.

As shown in fig. 1, 5, 6, 10, 11 and 12, in the preferred embodiment, the rear ends of the two clamping arms of the chuck are installed and accommodated in the space of the included angle formed by the two clamping arms 20, the chuck is in contact fit with the two clamping arms 20 by the elastic tension of the elastic sheet 11, the joint between the two clamping pieces 10 and the elastic sheet 11 is provided with a first notch 101, the elastic sheet 11 is provided with a corresponding second notch 111, the two clamping arms 20 are provided with a matched protrusion 201, and the protrusion 201 is embedded into the first notch 101 and the second notch 111, so that the chuck can be prevented from falling off in advance in the operation process.

In the preferred embodiment, the inner side of the clip 10 for clamping and contacting tissue is provided with a plurality of anti-slip protrusions. Like this, through being provided with anti-skidding structure for be difficult to slide or slippage when chuck centre gripping tissue more, the centre gripping is more firm.

As shown in fig. 1 and 12, in the present embodiment, the clamping arm 20 is hinged to the chuck base 50 through a pin 21, the clamping arm 20 includes a front arm portion located in front of the hinged position of the clamping arm and a rear arm portion located behind the hinged position of the clamping arm, the front arm portion is used for clamping the chuck and is provided with the protrusion 201, the front arm portion of the two clamping arms 20 forms the included angle space for accommodating the rear end of the chuck, and the rear arm portion is connected to the spindle through a connecting member.

In the preferred embodiment, the front arm of the clamping arm 20 is shorter than the rear arm, so as to form a labor-saving lever structure for convenient operation.

In this embodiment, an intersecting link structure is adopted: as shown in fig. 2, the two clamping arms 20 are hinged by a pin 21, pin mounting holes are formed in two mounting arms of the clamping head seat 50, which are opposite to each other, and after the pin 21 passes through the pin holes of the two clamping arms 20, both ends of the pin 21 are mounted in the pin mounting holes of the clamping head seat 50.

In a preferred embodiment, as shown in fig. 1, 2 and 3, the connecting member comprises a push-pull rod 60 and two connecting pieces (a single-column connecting piece 30 and a double-column connecting piece 40), the front ends of the two connecting pieces are respectively hinged with the two clamping arms 20, the rear ends of the two connecting pieces are hinged with the front end of the push-pull rod 60, so that the two clamping arms 20 and the two connecting pieces form a four-bar linkage, and the rear end of the push-pull rod 60 is fixedly connected with the distal end of the mandrel. The connecting sheet is hinged with the push-pull rod 60 through the matching of a connecting column and a connecting hole; the connecting piece and the clamping arm 20 are hinged through matching of a connecting column and a connecting hole.

In the preferred embodiment, the front end of the push-pull rod 60 is provided with a connecting hole, the rear end of the clamping arm 20 is provided with a connecting hole, the single-column connecting piece 30 is integrally formed with a connecting column and a connecting hole, and the double-column connecting piece 40 is integrally formed with two connecting columns. The single-column connecting sheet 30 and the double-column connecting sheet 40 are respectively matched with the connecting holes on the two intersected clamping arms 20; the single-column connecting sheet 30 and the double-column connecting sheet 40 are matched with the connecting holes on the push-pull rod 60; the push-pull rod 60 is coaxially engaged with the collet seat 50.

In other embodiments, the connecting member may also be two connecting rods, the front ends of the connecting rods are connected with the connecting holes at the rear ends of the clamping arms 20 through connecting hooks, and the rear ends of the connecting rods are fixedly connected with the distal ends of the mandrels. The connecting rod can be a steel wire hook, and the connecting hook is integrally formed at the front end of the connecting rod; the rear ends of the two connecting rods are fixed on the far end of the mandrel through a connecting pipe.

In this embodiment, as shown in fig. 1, fig. 2 and fig. 3, the chuck seat 50 is connected to the spring hose 80 through the rotating seat 70, the fixed seat 71 and the rotating cylinder 72, the fixed seat 71 is fixedly connected to the distal end of the spring hose 80, the rotating seat 70 and the fixed seat 71 are respectively sleeved on the rotating cylinder 72, the rotating seat 70 and the rotating cylinder 72 are connected in a manner of being capable of relatively rotating and axially limiting, the rotating cylinder 72 is fixedly connected to the fixed seat 71, and the rear portion of the chuck seat 50 is fixedly connected to the rotating seat 70. Therefore, the mandrel drives the clamping arm 20 and the clamping head seat to rotate through the push-pull rod so as to drive the clamping head to rotate, and the structure is simple, and the operation is convenient and reliable.

In this embodiment, as shown in fig. 1, fig. 2 and fig. 4, a flange is provided on the rotary cylinder 72, and the rotary seat 70 is sleeved on the rotary cylinder 72 and is matched with the flange through a stepped hole to realize axial limitation and relative rotation; the fixed seat 71 is provided with a welding hole, the fixed seat 71 is sleeved on the rotary cylinder 72 and fixedly connected with the rotary cylinder 72 through welding of the welding hole; the rotary seat 70 is provided with a welding hole, and the rotary seat 70 is sleeved on the rear portion of the chuck seat 50 and fixedly connected with the chuck seat 50 through welding of the welding hole.

In this embodiment, the opening, closing, releasing and rotating processes of the collet are as follows:

when the chuck is opened, as shown in fig. 2, 3 and 4, the push-pull rod 60 is pushed to drive the single-column connecting piece 30 and the double-column connecting piece 40 to rotate in opposite directions; the single-column connecting piece 30 and the double-column connecting piece 40 which rotate in the opposite circumferential directions drive the rear arm parts (longer parts) of the two clamping arms 20 which are arranged on the pin 21 and are intersected with each other, so that the power arm in the labor-saving lever principle is acted, and the power arm receives thrust and starts to do circumferential motion; the front arm (shorter part) of the two crossed clamping arms 20 extrudes the connection part of the rear parts of the two clamping pieces 10 and the elastic piece 11 through the action of a resistance arm in the labor-saving lever principle, so that the two clamping pieces 10 are forced to be passively opened.

When the chuck is closed, as shown in fig. 5, 6 and 7, the push-pull rod 60 is pulled to drive the single-column connecting piece 30 and the double-column connecting piece 40 to rotate circumferentially in opposite directions; the single-column connecting sheet 30 and the double-column connecting sheet 40 which rotate in opposite directions and circumferentially drive the rear arm parts (longer parts) of the two clamping arms 20 which are arranged on the pin 21 and are intersected with each other, so that the power arm in the labor-saving lever principle has the function of a power arm, and the power arm is pulled and starts to do circular motion; the front arm parts (shorter parts) of the two crossed clamping arms 20 are released to extrude the connection parts of the rear parts of the two clamping pieces 10 and the elastic pieces 11 under the action of the resistance arms in the labor-saving lever principle, and the two clamping pieces 10 connected to the elastic pieces 11 can be automatically closed under the elastic force of the elastic pieces 11. Further pulling the push-pull rod 60 to the bottom causes the two intersecting clamping arms 20 to be fully opened, the rear portions of the two clamping pieces 10 can be pulled out from the space of the included angle formed by the front arm portions of the two clamping arms 20, and then the collet holder 50 and the clamping arms 20 are withdrawn, as shown in fig. 8 and 9, thereby completing the collet release.

When the chuck rotates, the push-pull rod 60 rotates clockwise or counterclockwise, which can drive the connected single-column connecting piece 30, double-column connecting piece 40, two intersecting clamping arms 20, pin 21, chuck seat 50, rotary seat 70 and chuck to rotate clockwise or counterclockwise around the rotary cylinder 72 as an axis.

Example 2:

a hemostatic clamp as shown in fig. 13, which differs from the embodiment 1 only in that: in this embodiment, the two clamping arms are in a parallel connection structure, and the parallel connection structure adopts two pins 21 to respectively arrange the two clamping arms 20, so that the two clamping arms 20 can do opposite or reverse circular motion; as shown in fig. 14, 15, 16 and 21, there are two pins 21, the two clamping arms 20 are respectively hinged to the chuck seat 50 through the respective pins 21, two pin mounting holes are respectively formed on two mounting arms oppositely disposed on the chuck seat 50, after the pins 21 pass through the pin holes on the clamping arms 20, two ends of the pins 21 are mounted in the pin mounting holes on the chuck seat 50, so that the two clamping arms 20 are oppositely disposed in parallel. The other structure is the same as embodiment 1.

when the chuck is opened, as shown in fig. 14, 15 and 16, the push-pull rod 60 is pushed to drive the single-column connecting piece 30 and the double-column connecting piece 40 to rotate in opposite directions; the single-column connecting piece 30 and the double-column connecting piece 40 which rotate in the opposite circumferential directions respectively drive the rear arm parts (longer parts) of the two clamping arms 20 which are arranged on the two pins 21 in parallel and oppositely to form the action of a power arm in the labor-saving lever principle, and the rear arm parts and the double-column connecting pieces receive thrust and start to do circumferential motion; the front arm parts (shorter parts) of the two parallel clamping arms 20 extrude the connection parts of the rear parts of the two clamping pieces 10 and the elastic pieces 11 under the action of resistance arms in the labor-saving lever principle to force the two clamping pieces 10 to passively open.

When the chuck is closed, as shown in fig. 17, 18 and 19, the push-pull rod 60 is pulled to drive the single-column connecting piece 30 and the double-column connecting piece 40 to rotate circumferentially in opposite directions; the single-column connecting sheet 30 and the double-column connecting sheet 40 which rotate in opposite directions and circumferentially drive the rear arm parts (longer parts) of the two clamping arms 20 which are arranged on the pin 21 and connected in parallel respectively to form the effect of a power arm in the labor-saving lever principle, and the power arm is pulled and starts to do circular motion; the front arm parts (shorter parts) of the two parallel clamping arms 20 are released to extrude the connection parts of the rear parts of the two clamping pieces 10 and the elastic pieces 11 under the action of the resistance arms in the labor-saving lever principle, and the two clamping pieces 10 connected to the elastic pieces 11 can be automatically closed under the action of the elastic force of the elastic pieces 11. Further pulling the push-pull rod 60 to the bottom to fully open the two parallel arms 20, the rear parts of the two clips 10 can be pulled out from the space of the included angle formed by the front arms of the two arms 20, and then withdrawing the clip head seat 50 and the arms 20, etc., as shown in fig. 20, thereby completing the release of the clip head.

When the chuck rotates, the push-pull rod 60 rotates clockwise or counterclockwise to drive the connected single-column connecting piece 30, double-column connecting piece 40, two parallel clamping arms 20, pin 21, chuck seat 50, rotary seat 70 and chuck to synchronously rotate clockwise or counterclockwise around the rotary cylinder 72 as an axis.

According to the embodiment, the clamping piece with a certain clamping force is adopted, the elastic tension of the elastic piece at the tail part of the clamping piece is automatically closed, the clamping piece and the elastic piece are passively subjected to extrusion force through the connecting rod structure to be opened, no residual part exists after the clamping piece is released, and only the clamping piece is left at the wound to stop bleeding. Simple structure safety, low in manufacturing cost has avoided complex structures such as couple and spout among the prior art effectively, and the clamping piece can rely on simple part tension after the release, realizes the requirement that the clamping piece presss from both sides tight tissue, reduces simultaneously because of remaining other risks that the overlength brought after the clamp releases.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "one implementation," "a specific implementation," "other implementations," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment, implementation, or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described above may also be combined in any suitable manner in any one or more of the embodiments, examples, or examples. The invention also includes any one or more of the specific features, structures, materials, or characteristics described above, taken alone or in combination.

Although the embodiments of the present invention have been shown and described, it is understood that the embodiments are illustrative and not restrictive, and that those skilled in the art can make changes, modifications, substitutions, variations, deletions, additions or rearrangements of features and elements within the scope of the invention without departing from the spirit and scope of the invention.

Claims

1. The clamping head of the hemostatic clamp is characterized by comprising two clamping arm parts used for clamping tissues and an elastic connecting part used for endowing the two clamping arm parts with clamping tendency, wherein the front ends of the clamping arm parts are claw ends, the elastic connecting part is arranged between the two clamping arm parts, and the rear ends of the clamping arm parts can be clamped by two clamping arms (20).

2. The clamping head of the hemostatic clamp according to claim 1, wherein the clamping arms are the clamping pieces (10), the elastic connecting part is a spring piece (11) with a deformable opening, the deformable opening of the spring piece (11) is arranged backwards, and two ends of the spring piece (11) are respectively fixedly connected with the rear parts of the two clamping pieces (10); when the rear parts of the two clamping pieces (10) are subjected to extrusion acting force, the deformable opening of the elastic piece (11) is reduced or closed, so that the front ends of the two clamping pieces (10) are driven to open; when the rear parts of the two clamping pieces (10) are not subjected to external force, the front ends of the two clamping pieces (10) are automatically closed under the elastic tension condition of the elastic sheet (11).

3. The clamping head of the hemostatic clamp according to claim 2, characterized in that the two ends of the elastic sheet (11) are welded and fixed with the back of the two clamping sheets (10).

4. A collet of a hemostatic clamp according to claim 1, characterized in that the spring plate (11) is made of nitinol.

5. The collet of claim 1, wherein the two arms are hinged to each other, and the resilient connecting portion is a spring or a leaf spring.

6. A haemostatic clamp, comprising a collet of a haemostatic clamp according to any of claims 1-5, further comprising a mandrel, a spring hose (80) and a collet seat (50), the mandrel being arranged to extend through the spring hose (80), the distal end of the spring hose (80) being connected to the collet seat (50), the distal end of the mandrel being connected to both clamping arms (20) by a connector, the two clamping arms (20) being hingedly arranged on the collet seat (50) and being releasably connected to the collet.

7. A hemostatic clamp according to claim 6, wherein the rear ends of the two clamping arms of the clamping head are arranged to be received in the space defined by the two clamping arms (20) and to be in contact engagement with the two clamping arms (20) by the elastic tension of the elastic connecting part; the rear portion of chuck is equipped with the notch, the front portion of arm lock (20) be equipped with be used for with notch complex arch (201).

8. A haemostatic clamp according to claim 7, characterised in that the clamping arms (20) are pivotally connected to the cartridge holder (50) by pins (21), the clamping arms (20) comprising a front arm portion located forwardly of their pivotal connection and a rear arm portion located rearwardly of their pivotal connection, the front arm portions of the two clamping arms (20) defining said angular space therebetween for receiving the rear end of the cartridge, the rear arm portions being connected to the mandrel by a connector.

9. A haemostatic clamp according to claim 8, wherein the connecting member comprises a push-pull rod (60) and two connecting pieces, the front ends of the two connecting pieces are hinged to the two clamping arms (20) respectively, and the rear ends of the two connecting pieces are hinged to the front end of the push-pull rod (60), so that the two clamping arms (20) and the two connecting pieces form a four-bar linkage, and the rear end of the push-pull rod (60) is fixedly connected to the distal end of the mandrel.

10. The hemostatic clamp according to claim 6, wherein the clamp head seat (50) is connected to the spring hose (80) through a rotating seat (70), a fixed seat (71) and a rotating cylinder (72), the fixed seat (71) is fixedly connected to a distal end of the spring hose (80), the rotating seat (70) and the fixed seat (71) are respectively sleeved on the rotating cylinder (72), the rotating seat (70) is connected to the rotating cylinder (72) in a manner of relative rotation and axial limitation, the rotating cylinder (72) is fixedly connected to the fixed seat (71), and a rear portion of the clamp head seat (50) is fixedly connected to the rotating seat (70).