CN219353999U - Traction pliers and traction device - Google Patents

Abstract

The utility model provides a traction pliers and a traction device, wherein the traction pliers comprise: the two pliers bodies are respectively provided with pliers heads and pliers handles at two ends, and the middle parts of the two pliers bodies are arranged in a crossing way, so that a jaw part capable of being opened and closed is formed between the two pliers heads, and a pliers tail part is formed between the two pliers handles; the elastic piece is arranged at the tail part of the clamp and is suitable for applying pressure to the two clamp handles far away from each other so as to keep the jaw part at a closed position where the two clamp heads are contacted to clamp the first human tissue; the first end of the traction wire is fixed on the tail part of the pliers or the elastic piece; and a needle, the blunt end of the needle being connected to the second end of the pull wire, the sharp end of the needle being adapted to pierce and pass through a second body tissue covering the first body tissue to draw the second end out of the body such that the second end is secured to a structural member external to the body. The traction device comprises traction pliers and operation pliers.

Description

Traction pliers and traction device

Technical Field

The utility model relates to the technical field of surgical equipment, in particular to a traction forceps and a traction device applied to endoscopic surgery.

Background

In some endoscopic procedures (such as thyroscopic procedures), it is necessary to create an operative space (lumen) on the skin and tissues (such as muscles) of a patient and to pull part of the patient's body tissue during the procedure in order to reduce the shielding and interference of other body tissues on the affected part.

Current traction devices can only be extended and retracted from the patient's incision, and therefore only traction of body tissue exposed to the established surgical space. In addition, because the established operation space is limited, the traction direction and traction tension are greatly limited, the human tissue is not easy to be traction, and the traction tension of the human tissue (such as tissues, glands, nerves and other organs) is also easy to be insufficient, so that the operation progress is influenced.

Disclosure of Invention

In order to solve the technical problems in the prior art, the utility model provides the traction pliers and the traction device, and the traction device can traction human tissues without an incision, so that the traction device has greater flexibility for traction of the human tissues and is beneficial to providing greater traction tension.

To achieve the above object, an aspect of the present utility model provides a pulling clamp including: the two pliers bodies are respectively provided with a pliers head and a pliers handle at two ends, and the middle parts of the two pliers bodies are arranged in a crossing way, so that a jaw part capable of opening and closing is formed between the two pliers heads, and a pliers tail is formed between the two pliers handles; the elastic piece is arranged at the tail part of the clamp and is suitable for applying pressure to the two clamp handles far away from each other, so that the jaw part is kept at a closed position where the two clamp heads are contacted, and the first human tissue is clamped; the first end of the traction wire is fixed on the tail part of the clamp or the elastic piece; and a needle, the blunt end of the needle being connected with the second end of the pull wire, the sharp end of the needle being adapted to pierce and pass through a second human tissue covering the first human tissue to draw the second end out of the human body such that the second end is secured to a structural member external to the human body.

In an exemplary embodiment, the opposite end faces of the two handles are provided with recesses, respectively, adapted to be gripped by an external driving instrument, for applying a pressure to the handles towards each other such that the jaw portions are in an open position in which the two jaws are spaced apart.

In an exemplary embodiment, two first clamp bodies are included, the cheek positions of the two first clamp bodies being pivotally mounted such that the two first clamp bodies are pivotally connected.

In an exemplary embodiment, the facing end surfaces of the handles of the two first clamp bodies are provided with protruding parts; the elastic piece comprises a compression spring, and two ends of the compression spring are respectively sleeved on the outer sides of the opposite protruding parts and are abutted against the opposite end surfaces of the clamp handles.

In an exemplary embodiment, the handles of at least one of the first clamp bodies are provided with through holes for securing the first ends of the traction wires.

In an exemplary embodiment, the pliers comprise a second pliers body and a third pliers body, wherein a through groove for accommodating the pliers handle of the third pliers body is formed in the pliers cheek position of the second pliers body, and the width of the through groove is larger than that of the part of the third pliers body in the through groove, so that the third pliers body can swing along the width direction of the through groove.

In an exemplary embodiment, the elastic member includes a torsion spring, and handles of the second and third clamp bodies are respectively fixed to an end of one torsion bar of the torsion spring.

In an exemplary embodiment, the first end of the traction wire is fixed to the torsion spring.

Another aspect of the utility model provides a traction device comprising a traction tong; and operating pliers, comprising: a tubular member; the two pincer-shaped pieces are symmetrically arranged on two sides of one axial end of the tubular piece, one end of each pincer-shaped piece extends out of the tubular piece, the other end of each pincer-shaped piece is positioned in the tubular piece, and the middle part of each pincer-shaped piece is pivotally arranged on the tubular piece; a driving part pivotally connected with the two pincer-shaped pieces, and adapted to drive the ends of the two pincer-shaped pieces, which extend out of the tubular pieces, to swing between a clamping position where the two pincer-shaped pieces are close to each other and an open position where the two pincer-shaped pieces are far away from each other; and in the state of the open position, the operating forceps are separated from the traction forceps, so that the two forceps bodies of the traction forceps are reset to the closed position.

In an exemplary embodiment, the driving part includes: two links, one end of each link being pivotally mounted to an end of one of the pincer members within the tubular member; a first tie rod, one axial end of which is pivotally mounted to the other ends of the two links, the other ends of which extend in the axial direction of the tubular member; a ball seat mounted at the other end of the first pull rod and slidably mounted in the tubular member; a second pull rod, one end of which forms a ball head, the ball head being mounted in the ball seat and configured to rotate about the axis of the tubular member, the other end of which extends from the end of the tubular member remote from the pincer member; and the pull ring is arranged at the end part of the second pull rod, which extends out of the tubular piece and is suitable for being held by a user so as to drive the two pincer pieces to swing relatively through the second pull rod.

According to the traction forceps and the traction device disclosed by the utility model, the jaw part formed by the two forceps bodies is used for clamping the first human body tissue, and the elastic piece is suitable for being abutted against the two forceps bodies so as to keep the jaw part in the closed position. The jaw part can be fully extended into the operation space under the state of clamping the first human body tissue, the second end of the traction wire passes through the second human body tissue of the patient through the needle and is fixed on an external structural member, and the traction device can not draw the human body tissue through the incision, so that the traction device has higher flexibility for drawing the human body tissue and is beneficial to providing higher traction tension.

Drawings

FIG. 1 is a front view of a pulling clamp according to an exemplary embodiment of the present utility model;

FIG. 2 is a front view of a pulling clamp according to another exemplary embodiment of the present utility model;

FIG. 3 is a side view of an operating clamp of a traction device according to an exemplary embodiment of the present utility model; and

fig. 4 is a view of the embodiment of fig. 3 in use with the operating clamp to traction clamp grip.

In the drawings, the reference numerals specifically have the following meanings:

1. traction pliers;

11. a needle;

12. a traction wire;

13. a first clamp body;

131. a clamp handle;

1311. a recessed portion;

1312. a through hole;

1313. a protruding portion;

132. a pivot;

133. a clamp head;

1331. a jaw;

14. an elastic member;

141. a compression spring;

142. a torsion spring;

15. a second clamp body;

151. a through groove;

16. a third clamp body;

2. operating pliers;

21. a pincer;

22. a connecting rod;

23. a first pull rod;

24. a ball seat;

25. ball head;

26. a second pull rod;

27. a tubular member;

28. a grip ring; and

29. and (5) a pull ring.

Detailed Description

The present utility model will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The terms "comprises," "comprising," and/or the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components. All terms, including technical and scientific terms, used herein have the meaning commonly understood by one of ordinary skill in the art unless otherwise defined. It should be noted that the terms used herein should be construed to have meanings consistent with the context of the present specification and should not be construed in an idealized or overly formal manner.

In this document, unless specifically stated otherwise, directional terms such as "upper," "lower," "left," "right," "inner," "outer," and the like are used to refer to an orientation or positional relationship shown based on the drawings, and are merely for convenience in describing the present utility model, rather than to indicate or imply that the devices, elements, or components referred to must have a particular orientation, be configured or operated in a particular orientation. It should be understood that when the absolute positions of the described objects are changed, the relative positional relationship they represent may also be changed accordingly. Accordingly, these directional terms should not be construed to limit the present utility model.

Where expressions like at least one of "A, B and C, etc. are used, the expressions should generally be interpreted in accordance with the meaning as commonly understood by those skilled in the art (e.g.," a system having at least one of A, B and C "shall include, but not be limited to, a system having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). Where a formulation similar to at least one of "A, B or C, etc." is used, in general such a formulation should be interpreted in accordance with the ordinary understanding of one skilled in the art (e.g. "a system with at least one of A, B or C" would include but not be limited to systems with a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).

Fig. 1 is a front view of a pulling clamp according to an exemplary embodiment of the present utility model.

The illustrative embodiment of the present utility model provides a pulling clamp 1, as shown in fig. 1, comprising two clamp bodies, an elastic member 14, a pulling wire 12 and a needle 11. The two ends of each clamp body are respectively provided with a clamp head 133 and a clamp handle 131, the middle parts of the two clamp bodies are arranged in a crossing way, so that a jaw part capable of opening and closing is formed between the two clamp heads 133, and a clamp tail part is formed between the two clamp handles 131. The elastic member 14 is disposed at the tail portion of the forceps and adapted to apply a pressure to the two forceps handles 131 away from each other so as to maintain the jaw portion in a closed position where the two forceps heads 133 are in contact with each other, so as to clamp the first human tissue. The first end of the pull wire 12 is secured to the tail or spring 14 of the clip. The blunt end of the needle 11 is connected to the second end of the pull wire 12, and the sharp end of the needle 11 is used to pierce and pass through the second human tissue covering the first human tissue to draw the second end out of the human body so that the second end is secured to a structural member outside the human body.

In an exemplary embodiment, the ratio of tail portion to jaw portion includes, but is not limited to, being configured to 1:2. It should be understood that embodiments of the present utility model are not limited thereto.

For example, the ratio of tail to jaw portion is configured to be 1:1, 1:3, 1:4, or other ratio, as appropriate to meet the clamping requirements of the first human tissue during surgery.

In such embodiments, the two forceps bodies form a jaw portion for grasping a first body tissue (e.g., at least one of tissue, glands, and nerves), and the resilient member 14 is adapted to bear against the two forceps bodies to maintain the jaw portions in a closed position. The jaw portion is maintained in a state of clamping the first human tissue, the tail portion of the forceps is fully extended into the operation space, and the second end of the pull wire 12 is passed through the second human tissue (such as muscle and/or skin) of the patient by the needle 11 and is fixed to an external structural member (such as an anesthesia frame). In this way, the pulling clamp 1 can pull the first human tissue without passing through the incision, and therefore, a more suitable penetration path can be selected to provide greater flexibility in pulling the pull wire 12 out and greater traction tension of the jaw portion on the first human tissue.

According to an embodiment of the present utility model, as shown in fig. 1, the opposite end surfaces of the two handles 131 are provided with recesses 1311, respectively, at symmetrical positions, adapted to be gripped by an external driving instrument, to apply pressure to the two handles 131 toward each other, so that the jaw portions are in an open position in which the two jaws 133 are spaced apart.

In one illustrative embodiment, the recesses 1311 provided on both handles 131 are configured in a generally parallel configuration.

In detail, the surface of the recess 1311 (the left end surface of the left grip 131 and the right end surface of the right grip 131 as shown in fig. 1) is flat.

In such embodiments, the recesses 1311 of the two handles 131 are configured to be generally parallel for grasping by a user's hand or by driving the instrument. The surface of the concave portion 1311 is flat, so that the pressure can extend in a direction substantially perpendicular to the concave portion 1311 in a state where the outside presses the handles 131 of the two clamp bodies, so that the handles 131 are subjected to a large force component and are not easy to slip.

According to an embodiment of the present utility model, as shown in fig. 1, the traction wrench 1 includes two first wrench bodies 13, and the locations of the wrench cheeks of the two first wrench bodies 13 are mounted by a pivot 132 so that the two first wrench bodies 13 are pivotally connected.

According to an embodiment of the present utility model, as shown in fig. 1, protrusions 1313 are provided on facing end surfaces of the handles 131 of the two first clamp bodies 13. The elastic member 14 includes a compression spring 141, and both ends of the compression spring 141 are respectively sleeved on the outer sides of the facing protrusions 1313 and abut against the facing end surfaces of the grip 131.

According to an embodiment of the present utility model, as shown in fig. 1, a through hole 1312 for fixing the first end of the traction wire 12 is provided on the grip 131 of at least one first grip body 13.

In an exemplary embodiment, the projection 1313 includes, but is not limited to, being configured as a cylindrical structure.

In detail, the extending direction of the protrusion 1313 is substantially perpendicular to the extending direction of the grip 131 (in the horizontal direction as shown in fig. 1).

In one illustrative embodiment, as shown in FIG. 1, the compression spring 141 is configured such that the diameter of the coils at the middle is greater than the diameter of the coils at the ends.

Further, the coils at both ends have a diameter substantially the same as the outer diameter of the boss 1313.

In an exemplary embodiment, the clamp body and/or compression spring 141 includes, but is not limited to, being made of stainless steel.

In such an embodiment, the outer diameter of the protrusion 1313 and the inner diameter of the coil at the end of the compression spring 141 are substantially the same, so that the compression spring 141 is fitted to the outside of the protrusion 1313 in a state where the compression spring 1313 is assembled, and the compression spring 141 and the protrusion 1313 can be effectively prevented from coming off. In addition, the track formed by the convex portions 1313 is arc-shaped in the process of approaching and separating the two handles 131 from each other, so that the compression spring 141 with the diameter of the spring coil in the middle being larger than that of the diameter of the two ends can effectively prevent the compression spring 141 from bending and falling off in the compression process, and can provide larger elastic force for the handles 131 so as to provide larger pressure for the handles 131.

In an exemplary embodiment, a through hole 1312 is provided in a grip 131 (left grip 131 as viewed in fig. 1) of one grip body.

In another exemplary embodiment, a through hole 1312 is provided in each of the handles 131 of both bodies.

In detail, one traction wire 12 is fixed in each of the two through holes 1312.

In one illustrative embodiment, pull wire 12 includes, but is not limited to, the use of surgical sutures.

Further, the needle 11 includes, but is not limited to, the use of a suture needle 11.

Further, pull wire 12 includes, but is not limited to, being secured within throughbore 1312 of grip 131 by a knot.

In such an embodiment, one traction wire 12 is fixed in each through hole 1312. In this way, two traction points can be provided on the traction forceps 1, so that traction on the first human tissue is more stable.

In an exemplary embodiment, the outside of the compression spring 141 may be sleeved with a bellows.

In detail, both ends of the bellows are connected to the facing handles 131 to be stretched or contracted with the interval between the two handles 131.

Further, the bellows is made of synthetic rubber (such as TPE, thermoplastic elastomer) material.

It should be noted that any bellows structure capable of meeting the expansion requirement in the art may be selectively applied, and no specific expansion is performed.

In such an embodiment, since the compression spring 141 is changed in the process of extension and compression, the gaps between the adjacent coils are easily changed, and the erroneous clamping of the human tissue is easily caused between the adjacent coils during the operation, the telescopic bellows is sleeved outside the compression spring 141, and the gaps between the coils can be blocked, so that the erroneous clamping of the human tissue is prevented.

Fig. 2 is a front view of a pulling clamp according to another exemplary embodiment of the present utility model.

According to another embodiment of the present utility model, as shown in fig. 2, the traction wrench 1 includes a second wrench body 15 and a third wrench body 16, wherein a through groove 151 for receiving a wrench 131 of the third wrench body 16 therethrough is provided at a wrench cheek position of the second wrench body 15, and a width of the through groove 151 is larger than a width of a portion of the third wrench body 16 located in the through groove 151, so that the third wrench body 16 can swing along a width direction of the through groove 151.

According to the embodiment of the present utility model, as shown in fig. 2, the elastic member 14 includes a torsion spring 142, and handles 131 of the second and third clamp bodies 15 and 16 are respectively fixed to an end portion of one torsion bar of the torsion spring 142.

According to an embodiment of the present utility model, as shown in FIG. 2, the first end of the traction wire 12 is secured to the torsion spring 142.

In an exemplary embodiment, the thickness of the grip 131 of the third jaw body 16 (the dimension facing the paper as shown in fig. 2) is less than the thickness of the jaw 133, and the thickness of the jaw 133 of the third jaw body 16 is substantially the same as the thickness of the second jaw 133.

In detail, the jaws 1331 of the jaws 133 of the second and third jaw bodies 15 and 16 include, but are not limited to, being configured in at least one of a Ai Lisi jaw structure, a mosquito jaw structure, a toothed jaw structure, and other jaw structures.

In one illustrative embodiment, the two torsion bars of the torsion spring 142 are symmetrically formed on either side of the coils.

In detail, the two torsion bars extend away from the coils.

Further, the two torsion bars are configured to be substantially parallel.

In an exemplary embodiment, the second clamp body 15 and the third clamp body 16 include, but are not limited to, being made of an alloy material.

Further, the torsion spring 142 includes, but is not limited to, being made of an alloy material.

Further, the third clamp body 16 and the torsion bars of the third clamp body 16 and the torsion spring 142 include, but are not limited to, integrally fixed by welding, riveting, and other connecting means.

In this embodiment, the elastic member 14 is configured by a torsion spring 142, and the second jaw 15 and the third jaw 16 serve as torsion bars for the torsion spring 142. Therefore, the traction pliers 1 are compact in structure, gaps are not easy to form among the coils of the torsion springs, and safety of operation is facilitated.

Fig. 3 is a side view of an operating clamp of a traction device according to an exemplary embodiment of the present utility model. Fig. 4 is a view of the embodiment of fig. 3 in use with the operating clamp to traction clamp grip.

The exemplary embodiment of the present utility model also provides a pulling device, as shown in fig. 3, comprising a pulling clamp 1 and an operating clamp 2. The operating pliers 2 comprise a tubular element, two pliers-shaped elements 21 and a drive. The two pincer-like members 21 are symmetrically disposed on both sides of one axial end of the tubular member, one end of each pincer-like member 21 extends from the tubular member, the other end is located in the tubular member, and the middle portion of the pincer-like member 21 is pivotally mounted on the tubular member. The driving part is pivotally connected to the two pincer elements 21 and adapted to drive the ends of the projecting tubular elements of the two pincer elements 21 to oscillate between a gripping position, in which they are close to each other, and an open position, in which they are far from each other. As shown in fig. 4, in the clamped position, the two pincer-like members 21 are adapted to clamp onto the two tail portions of the pulling pincer 1 to drive the two bodies of the pulling pincer 1 in the open position, in which the operating pincer 2 is disengaged from the pulling pincer 1 to return the two bodies of the pulling pincer 1 to the closed position.

According to an embodiment of the present utility model, as shown in fig. 3, the driving part includes two links 22, a first pull rod 23, a ball seat 24, a second pull rod 26, and a pull ring 29. One end of each link 22 is pivotally mounted to the end of one of the pincer 21 within the tubular member. One axial end of the first tie rod 23 is pivotably mounted to the other ends of the two links 22, and the other ends of the first tie rod 23 extend in the axial direction of the tubular member. A ball seat 24 is mounted to the other end of the first drawbar 23 and slidably mounted within the tubular member. One end of the second pull rod 26 forms a ball head 25, the ball head 25 being mounted in the ball seat 24 and configured to rotate about the axis of the tubular member, and the other end of the second pull rod 26 extends from the end of the tubular member remote from the pincer 21. A pull ring 29 is mounted to the end of the second pull rod 26 that protrudes from the tubular member and is adapted to be gripped by a user to drive the two pincer members 21 to oscillate relatively through the second pull rod 26.

In one illustrative embodiment, as shown in FIG. 3, the tubular member 27 includes, but is not limited to, a rod structure configured as a cylinder.

In detail, the interior of the rod structure forms a hollow mounting cavity.

In an exemplary embodiment, as shown in fig. 3, the middle of the two pincer members 21 are pivotally mounted by shafts on both sides (left and right sides as shown in fig. 3) of the opening of the tubular member 27 to form a lever mechanism.

In detail, the lower ends of the two pincer members 21 protrude from the opening of the tubular member 27, and the upper ends of the pincer members 21 are located in the tubular member 27.

Further, the facing end surfaces of the pincer 21, which end portions protrude from the opening of the tubular member 27, are provided with an anti-slip structure (such as any one of a ridge, a bump and a rougher end surface).

In an exemplary embodiment, as shown in fig. 3, the links 22 include, but are not limited to, a straight link 22 structure, with the opposite ends (left and right ends as viewed in fig. 3) of the two links 22 pivotally connected to the upper end of one clamp 21 by a shaft, and the opposite ends of the two links 22 pivotally connected to the lower end of the first tie rod 23.

Further, the axes of the first pull rod 23, the second pull rod 26 and the tubular member 27 coincide.

In one illustrative embodiment, the tee 24 includes a first portion (lower portion) and a second portion (upper portion).

In detail, hemispherical grooves are formed in both end surfaces of the first portion and the second portion facing each other.

Further, a through hole 1312 is formed at the bottom of the hemispherical groove of the second portion so that the upper end portion of the second tie bar 26 is penetrated through the through hole 1312.

Still further, the first and second portions include, but are not limited to, threaded engagement.

In an exemplary embodiment, the outside diameter of the ball seat 24 is approximately the same as the inside diameter of the tubular member 27.

In detail, the outer wall of the ball member slidably cooperates with the inner wall of the tubular member 27.

In an exemplary embodiment, the pull ring 29 includes, but is not limited to, being mounted to the upper end of the second pull rod 26 by any one of riveting, welding, snap-fitting, and threaded engagement.

Further, the outer wall of the tubular member 27 is symmetrically provided with a grip ring 28 for the operator to grip.

In such an embodiment, the extending directions of the axes of the first pull rod 23 and the second pull rod 26 are overlapped, the second pull rod 26 is pulled by the pull ring 29, the end portion of the pincer 21 located in the tubular member 27 can be driven to swing by the connected link 22, and the tubular member 27 forms a lever structure, so that the end portion of the pincer 21 extending from the tubular member 27 can be moved between the clamping position and the open position to clamp the concave portion 1311 of the pulling pincer 1, and the pulling pincer 1 can be moved between the open position and the closed position to clamp the first human body tissue. The first portion of the ball seat 24 is mounted on the upper end of the first link 22, and the ball head 25 of the second link 22 is rotatably mounted in the second portion of the ball seat 24, so that the second link 22 and the pull ring 29 can rotate relative to the tubular member 27 and the pincer 21 mounted on the tubular member 27, and the angle of the pincer 21 relative to the pull ring 29 can be adjusted in a state where the operating pincer 2 is inserted into the human body, so that the user can control the position of the pincer 21 relative to the pulling pincer 1.

Those skilled in the art will appreciate that the features recited in the various embodiments of the utility model and/or in the claims may be combined in several combinations or combinations, even if such combinations or combinations are not explicitly recited in the utility model. In particular, the features recited in the various embodiments of the utility model and/or in the claims can be combined in several ways and/or combined without departing from the spirit and teachings of the utility model. All such combinations and/or combinations fall within the scope of the utility model.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present utility model, and are not meant to limit the utility model thereto, but to limit the utility model thereto.

Claims (10)

1. A pulling clamp, comprising:

the two pliers bodies are respectively provided with a pliers head (133) and a pliers handle (131) at two ends, and the middle parts of the two pliers bodies are arranged in a crossing way, so that a jaw part capable of opening and closing is formed between the two pliers heads (133), and a pliers tail is formed between the two pliers handles (131);

the elastic piece (14) is arranged at the tail part of the clamp and is suitable for applying pressure to the two clamp handles (131) far away from each other so that the jaw part is kept at a closed position where the two clamp heads (133) are contacted to clamp the first human tissue;

a traction wire (12), a first end of the traction wire (12) being fixed to the jaw tail or elastic member (14); and

the needle (11), the blunt end of needle (11) with the second end of haulage line (12) is connected, the sharp end of needle (11) is used for puncture and through covering the second human tissue of first human tissue to draw forth the second end outside the human body, makes the second end be fixed in on the structure outside the human body.

2. Traction pliers according to claim 1, characterized in that the opposite end faces of the two handles (131) are provided with recesses (1311) respectively, adapted to be gripped by an external driving instrument, so as to apply a pressure to the handles (131) close to each other, so that the jaw portions are in an open position in which the two jaws (133) are distant.

3. Traction pliers according to claim 1 or 2, characterized in that it comprises two first pliers bodies (13), the positions of the cheeks of the two first pliers bodies (13) being mounted by means of a pivot (132) so that the two first pliers bodies (13) are pivotably connected.

4. A traction wrench as claimed in claim 3, wherein the facing end surfaces of the handles (131) of both said first wrench bodies (13) are provided with protrusions (1313);

the elastic piece (14) comprises a compression spring (141), and two ends of the compression spring (141) are respectively sleeved on the outer sides of the opposite convex parts (1313) and abutted against the opposite end surfaces of the clamp handles (131).

5. Traction pliers according to claim 4, characterized in that the handles (131) of at least one of the first pliers bodies (13) are provided with through holes (1312) for fixing the first ends of the traction wires (12).

6. Traction pliers according to claim 1 or 2, characterized in that it comprises a second pliers body (15) and a third pliers body (16), the pliers cheek position of the second pliers body (15) is provided with a through slot (151) for receiving the pliers handle (131) of the third pliers body (16) therethrough, the width of the through slot (151) is larger than the width of the part of the third pliers body (16) located in the through slot (151), so that the third pliers body (16) can swing along the width direction of the through slot (151).

7. The traction wrench as claimed in claim 6, wherein the elastic member (14) includes a torsion spring (142), and handles (131) of the second wrench body (15) and the third wrench body (16) are respectively fixed to an end portion of one torsion bar of the torsion spring (142).

8. The pulling clamp as defined in claim 7, wherein a first end of the pull wire (12) is secured to the torsion spring (142).

9. A traction device, comprising:

the pulling clamp of any one of claims 1 to 8; and

operating pliers (2), comprising:

a tubular member (27);

the two pincer-shaped pieces (21) are symmetrically arranged on two sides of one axial end of the tubular piece (27), one end of each pincer-shaped piece (21) extends out of the tubular piece (27), the other end of each pincer-shaped piece is positioned in the tubular piece (27), and the middle part of each pincer-shaped piece (21) is pivotally arranged on the tubular piece (27);

a driving part pivotally connected with the two pincer-shaped pieces (21), and suitable for driving the ends of the two pincer-shaped pieces (21) extending out of the tubular piece (27) to swing between a clamping position close to each other and an open position far away from each other;

wherein in the state of the clamping position, the two pincer-shaped pieces (21) are suitable for being clamped on the two tail parts of the traction forceps so as to drive the two forceps bodies of the traction forceps to be in an open position, and in the state of the open position, the operating forceps (2) are separated from the traction forceps so as to reset the two forceps bodies of the traction forceps to be in the closed position.

10. The traction device of claim 9, wherein the drive comprises:

-two links (22), one end of each link (22) being pivotally mounted to an end of one of the pincer (21) within the tubular member (27);

a first pull rod (23), one axial end of the first pull rod (23) is pivotally arranged at the other ends of the two connecting rods (22), and the other end of the first pull rod (23) is arranged along the tubular part UB221684

(27) Is extended in the axial direction of (2);

a ball seat (24) mounted on the other end of the first pull rod (23) and slidably mounted in the tubular member (27);

a second tie rod (26), one end of the second tie rod (26) forming a ball head (25), the ball head (25) being mounted in the ball seat (24) and configured to rotate about the axis of the tubular member (27), the other end of the second tie rod (26) protruding from the end of the tubular member (27) remote from the pincer (21); and

and a pull ring (29) which is arranged at the end part of the second pull rod (26) extending out of the tubular piece (27) and is suitable for being held by a user so as to drive the two clamp pieces (21) to swing relatively through the second pull rod (26).