Self-locking vessel forceps

Abstract

The utility model provides a pair of self-locking vessel forceps, which belongs to the technical field of vessel forceps, and comprises a forceps handle rod, a first clamping arm bent towards one side is arranged at the front end of the forceps handle rod, a sliding rod is arranged on the forceps handle rod, the sliding rod is in sliding fit with the forceps handle rod, a second clamping arm is arranged at the front end of the sliding rod, and the second clamping arm is connected with the first clamping arm. The second clamping arm and the first clamping arm are arranged in parallel, a driving assembly used for driving the sliding rod to slide is arranged at the rear end of the sliding rod, the driving assembly comprises a driving rod, the driving rod is hinged to the forceps handle rod, the side, close to the first clamping arm, of the upper end of the driving rod abuts against the sliding rod, and the second clamping arm abuts against the second clamping arm. A self-locking structure is arranged between the forceps handle rod and the driving rod. The vessel forceps overcome the defects that traditional vessel forceps need to apply force continuously to maintain clamping, so that the hands of a doctor are tired, the clamping force is difficult to control, and tissue is damaged easily.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of blood vessel forceps, and particularly relates to a self-locking blood vessel forceps. BACKGROUND

[0002] Blood vessel forceps are extremely important medical instruments in surgical operations, and are mainly used for clamping blood vessels or other tissues to achieve hemostasis, separation, ligation and other operations. The blood vessel forceps generally comprise a handle, a lever and a head, the head part usually has two clamping arms arranged oppositely, and the opening and closing actions of the clamping arms are controlled by operating the handle, so that the clamping operation on the target tissues such as blood vessels is performed.

[0003] The blood vessel transplantation surgical forceps with publication number CN221617159U (application number CN202323585006.3) comprises a mounting rod, a first clamping rod is arranged on the front end of the mounting rod and is folded to one side, a sliding rod is arranged on the mounting rod and is in sliding cooperation with the mounting rod, a second clamping rod is arranged on the front end of the sliding rod and is arranged in parallel with the first clamping rod, a pushing assembly for pushing the sliding rod to slide is arranged on the rear end of the sliding rod, the pushing assembly comprises a push rod, the push rod is hinged to the mounting rod, an elastic rope for the elastic return of the sliding rod is arranged on the mounting rod, one end of the elastic rope is connected with the sliding rod, the other end is connected with the rear end of the mounting rod, an adjusting assembly for adjusting the sliding distance of the sliding rod is arranged on the mounting rod, a handle is arranged on the mounting rod, and a locking assembly for locking the push rod is arranged on the handle.

[0004] The above-mentioned blood vessel forceps have many disadvantages in actual use. During long-time surgical operation, the doctor needs to continuously hold the blood vessel forceps and maintain a certain clamping force, which is a great test for the hand strength and endurance of the doctor. Moreover, after clamping the blood vessel, if the doctor needs to free his hand to perform other operations, such as replacing surgical instruments, suturing, etc., an assistant needs to assist in fixing the blood vessel forceps or other temporary fixing measures are adopted, which not only increases the complexity and labor demand of the surgical operation, but also may affect the surgical progress and effect due to improper cooperation. In addition, the clamping force of the traditional blood vessel forceps is difficult to accurately control, and for some fragile blood vessels or delicate tissues, irreversible damage may be caused due to excessive clamping force, which affects the success rate of the operation and the postoperative recovery of the patient. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a self-locking blood vessel forceps, which solves the problems of the traditional blood vessel forceps, such as the need for continuous force to maintain clamping, the fatigue of the doctor's hand, the lack of self-locking function and inconvenient operation, and improves the surgical efficiency and safety.

[0006] The utility model is implemented as follows:

[0007] The utility model provides a self -locking type blood vessel forceps, including the handle lever, the handle lever front end is provided with the first clamping arm who bends to one side, be provided with the sliding rod on the handle lever, the sliding rod with the handle lever sliding cooperation, the sliding rod front end is provided with the second clamping arm, the second clamping arm with the first clamping arm parallel setting, the sliding rod rear end is provided with the drive assembly for driving the sliding rod sliding, the drive assembly includes the drive rod, the drive rod is hinged on the handle lever, wherein, the drive rod upper end is close to the first clamping arm one side and the sliding rod abuts, be provided with the self -locking structure between the handle lever with the drive rod for locking position after the drive rod rotates to certain angle, make the first clamping arm with the second clamping arm keep clamping state.

[0008] On the basis of the above technical scheme, the self-locking type blood vessel forceps of the utility model can also be improved as follows:

[0009] Among them, the self-locking structure includes the lock slot setting on the handle lever and the lock block setting on the drive rod and being matched with the lock slot, when the drive rod rotates to make the first clamping arm and the second clamping arm close to the appropriate position, the lock block is inserted into the lock slot to realize self-locking.

[0010] The lock slot in the self-locking structure is arranged on the side of the handle lever close to the hinge point of the drive rod, and is a long strip-shaped groove, and the length direction of the long strip-shaped groove extends along the rotation track of the drive rod.

[0011] Further, a damping structure is arranged at the rotation shaft of the drive rod, and the damping structure is used for increasing the resistance when the drive rod rotates.

[0012] A damping sleeve assembly is arranged at the hinge part of the drive rod and the handle lever. The damping sleeve assembly includes an outer sleeve fixed on the handle lever and an inner sleeve nested in the outer sleeve and connected with the drive rod. The gap between the inner wall of the outer sleeve and the outer wall of the inner sleeve is 0.05-0.15 mm, and the gap is filled with a special damping material with high friction coefficient, such as a mixture of silica gel containing graphite powder.

[0013] Further, the end of the sliding rod close to the drive rod is provided with a drive connecting part abutting against the drive rod, and the side abutting against the drive rod of the drive connecting part is an arc surface structure.

[0014] The driving connection part is a protruding structure extending from the side of the sliding rod close to the driving rod, which is integrally formed with the sliding rod. The protrusion is arc-shaped in the cross section perpendicular to the axial direction of the sliding rod, and the center of the arc is located at the hinge point of the driving rod and the handle rod. The arc surface is finely polished to reduce friction when abutting against the driving rod, ensuring that the driving rod can smoothly push the sliding rod to move, while stably transmitting the force to the sliding rod when bearing the pushing force of the driving rod, so that the second clamping arm and the first clamping arm realize smooth opening and closing action.

[0015] Further, the handle rod is provided with an elastic traction member for elastic resetting of the sliding rod, one end of the elastic traction member is connected with the sliding rod, and the other end is connected with the rear end of the handle rod.

[0016] The elastic traction member is made of elastic steel wire. One end of the elastic traction member is fixed at the rear end of the sliding rod close to the handle rod by welding or riveting, and the fixed point is located on the side of the sliding rod, and the connection is firm and reliable to avoid loosening during use. The other end of the elastic traction member is connected with an adjusting ring, the adjusting ring is sleeved on the adjusting screw, and the pre-tightening force of the elastic traction member can be changed by cooperation of the adjusting screw and the threaded hole at the rear end of the handle rod. The elastic traction member is in a stretched state in a natural state, and the tension direction is along the axial direction of the handle rod, which always applies a backward tension to the sliding rod, so that the second clamping arm and the first clamping arm remain open when the driving rod is not applied with a pushing force, and the sliding rod can be reset in time after the driving rod is released, so that the vascular forceps returns to the initial open position.

[0017] Further, the handle rod is provided with an adjusting structure for adjusting the sliding stroke of the sliding rod; the adjusting structure comprises an adjusting screw, and the adjusting screw is connected with the end of the elastic traction member away from the sliding rod.

[0018] The adjusting screw is made of stainless steel, one end of the adjusting screw is connected with the adjusting ring of the elastic traction member, and the connection mode can be threaded connection or clamping sleeve connection, so as to ensure stable and adjustable connection. The other end of the adjusting screw has external threads matched with the threaded hole formed at the rear end of the handle rod.

[0019] Further, a threaded matching hole is formed at the rear end of the handle rod, and the threaded matching hole is connected with the adjusting screw through threaded cooperation.

[0020] Further, a handle is arranged on the handle rod, and anti-slip texture is arranged on the surface of the handle.

[0021] The anti-slip texture on the surface of the handle is made by laser etching process.

[0022] Furthermore, the handle is provided with a control component for controlling the locking and unlocking of the drive rod; the control component includes a first locking tooth disposed at the bottom of the handle, and a second locking tooth that cooperates with the first locking tooth is hinged to the drive rod; a return torsion spring is provided at the hinge point between the second locking tooth and the drive rod.

[0023] Furthermore, both the first and second clamping arms have anti-slip protrusions on their clamping surfaces.

[0024] The anti-slip protrusions on the clamping surfaces of the first and second clamping arms are made of granular rubber.

[0025] Compared with the prior art, the beneficial effects of the self-locking vascular clamp provided by this utility model are:

[0026] This invention relates to a self-locking vascular clamp. By incorporating a self-locking structure, the clamp automatically locks itself after being closed to the appropriate position, eliminating the need for continuous external force from the surgeon. This allows the surgeon to intermittently relax their hand muscles during surgery, effectively reducing hand fatigue caused by prolonged surgical procedures.

[0027] The self-locking function allows surgeons greater freedom to perform multiple instrument operations or other complex actions during surgery. When surgeons need to free their hands for suturing, knot tying, or other procedures, the self-locking hemostat can stably hold the blood vessel without the need for an assistant, reducing coordination between surgical personnel and improving surgical efficiency.

[0028] The adjustable mechanism of this vascular clamp allows for easy adjustment of the sliding stroke of the sliding rod, thereby precisely controlling the clamping force of the first and second clamping arms. By rotating the adjusting screw, the appropriate clamping force can be set according to different surgical scenarios and blood vessel types. For thin-walled or small blood vessels, the surgeon can reduce the clamping force to avoid excessive compression of the vessel wall, which could lead to rupture or intimal damage; for thicker or more resilient blood vessels, the clamping force can be appropriately increased to ensure reliable clamping. This precise control of clamping force helps protect vascular tissue, improves surgical success rates, and enhances patient prognosis.

[0029] The damping structure at the drive rod's rotation axis effectively enhances the stability of the vascular clamp. When the self-locking position is not reached, the damping force ensures that the drive rod maintains stable resistance during rotation, preventing loosening due to the vascular clamp's own weight or minor external forces. Attached Figure Description

[0030] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be to the utility model embodiment of the description of the drawings needed to use a brief introduction, obviously, the following description of the drawings in the utility model is only some embodiments, for those skilled in the art, without the premise of creative labor, can also obtain other drawings according to these drawings.

[0031] Fig. 1 It is a self-locking vascular forceps example diagram;

[0032] Fig. 2 It is a self-locking vascular forceps side view;

[0033] Fig. 3 It is a self-locking vascular forceps plan view;

[0034] In the drawings, the component list represented by each sign is as follows:

[0035] 10, the handle bar;11, the first clamping arm;12, the second clamping arm;13, the handle;20, the sliding rod;30, the drive assembly;31, the drive rod;40, the self-locking structure;41, the lock slot;42, the lock block. Specific implementation

[0036] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the following will be to the technical scheme in the utility model embodiment, clear, complete description in the utility model embodiment is combined with the drawings in the utility model embodiment.

[0037] As Figs. 1-3 As shown is the first embodiment of the utility model provided a kind of self-locking vascular forceps, in the embodiment, including handle bar 10, handle bar 10 front end is provided with the first clamping arm 11 that is bent to one side, handle bar 10 is provided with sliding rod 20, sliding rod 20 and handle bar 10 sliding fit, sliding rod 20 front end is provided with the second clamping arm 12, the second clamping arm 12 is parallelly arranged with the first clamping arm 11, sliding rod 20 rear end is provided with the drive assembly 30 for driving sliding rod 20 sliding, the drive assembly 30 includes drive rod 31, drive rod 31 is hinged on handle bar 10, wherein, the upper end of drive rod 31 is close to the side of first clamping arm 11 and abuts against sliding rod 20, handle bar 10 and drive rod 31 are provided with self-locking structure 40, for locking position after drive rod 31 rotates to a certain angle, make first clamping arm 11 and second clamping arm 12 keep clamping state.

[0038] In the above technical scheme, the self-locking structure 40 includes the lock slot 41 arranged on the handle bar 10 and the lock block 42 arranged on the drive rod 31 and matched with the lock slot 41, when the drive rod 31 rotates to make the first clamping arm 11 and the second clamping arm 12 close to the appropriate position, the lock block 42 is clamped into the lock slot 41 to realize self-locking.

[0039] The lock block is arranged on the driving rod near the hinge point with the handle rod, and is integrally formed with the driving rod. The lock block is cuboid in shape, and its size is matched with the lock slot, and its width is slightly smaller than the width of the lock slot. The front end of the lock block (i.e. the end facing the entrance of the lock slot) is provided with a guide inclined surface, and the angle of the inclined surface is about 30-45 degrees, so that the lock block can smoothly slide into the lock slot during the rotation of the driving rod to close the vessel forceps. When the driving rod is rotated to the position where the first clamping arm and the second clamping arm are closed to the appropriate clamping force, the lock block is clamped into the lock slot under the action of the elastic force (such as the elastic deformation recovery force of the driving rod itself or the elastic force of an additional small spring), and self-locking is achieved. When unlocking, the second locking tooth is disengaged from the engagement with the first locking tooth by operating the control assembly, and then an external force is applied to rotate the driving rod, so that the lock block exits along the lock slot, and the self-locking state is released. At this time, the elastic traction member can drive the sliding rod to reset, so that the vessel forceps are opened.

[0040] Further, in the above technical solution, a damping structure is arranged at the rotation shaft of the driving rod 31, and the damping structure is used to increase the resistance when the driving rod 31 rotates. The damping structure is specifically a damping sleeve arranged at the hinge position of the handle rod 10 and the driving rod 31.

[0041] Further, in the above technical solution, the driving connection part is arranged on one end of the sliding rod 20 close to the driving rod 31, and the side of the driving connection part abutting against the driving rod 31 is arc-shaped.

[0042] Further, in the above technical solution, the elastic traction member is arranged on the handle rod 10 for elastic resetting of the sliding rod 20. One end of the elastic traction member is connected with the sliding rod 20, and the other end is connected with the rear end of the handle rod 10.

[0043] Further, in the above technical solution, the adjusting structure for adjusting the sliding stroke of the sliding rod 20 is arranged on the handle rod 10. The adjusting structure includes an adjusting screw, and the adjusting screw is connected with the end of the elastic traction member away from the sliding rod 20.

[0044] By rotating the adjusting screw, the position of the adjusting screw in the threaded hole can be changed, so as to adjust the stretching length of the elastic traction member, and further change the initial position and sliding stroke of the sliding rod. A knob is arranged on the head of the adjusting screw for convenient rotation operation. Anti-slip lines can be arranged on the surface of the knob, so that the user can rotate the knob with fingers or tools for accurate setting of the clamping force and opening size of the vessel forceps.

[0045] Further, in the above technical solution, a threaded matching hole is arranged at the rear end of the handle rod 10, and the threaded matching hole is connected with the adjusting screw through threaded matching.

[0046] Further, in the above technical solution, the handle 13 is arranged on the handle rod 10, and the handle 13 is provided with anti-skid textures on the surface.

[0047] Further, in the above technical solution, the handle 13 is arranged on the handle rod 10, and the handle 13 is provided with anti-skid textures on the surface.

[0048] Further, in the above technical solution, the handle 13 is arranged on the handle rod 10, and the handle 13 is provided with anti-skid textures on the surface.

[0049] The connecting mode of the rubber particles of the anti-skid protrusions and the clamping arms is embedded, that is, a groove matched with the shape of the bottom of the particles is formed on the clamping surface of the clamping arm, and then the rubber particles are bonded in the groove through glue, so that the particles are firmly attached to the clamping arm, and it is ensured that the particles will not fall off in the long-term use process.

[0050] Specifically, the principle of the utility model is:

[0051] The clamping action principle is:

[0052] When the doctor operates the driving assembly, the driving rod rotates around the hinge point of the driving rod and the handle rod. Since the upper end of the driving rod is close to the driving connection part of the sliding rod on the side of the first clamping arm, the rotation of the driving rod will push the sliding rod to slide along the handle rod. The second clamping arm at the front end of the sliding rod cooperates with the first clamping arm fixed at the front end of the handle rod, so as to realize the clamping action on the blood vessel or tissue.

[0053] The self-locking principle is:

[0054] During the rotation of the driving rod, when the hemostat is closed to the appropriate clamping force position, the lock block in the self-locking structure is clamped into the lock groove on the handle rod under the action of the elastic force. The guide inclined surface at the front end of the lock block helps it to smoothly slide into the lock groove, and the buffer limiting structure at both ends of the lock groove ensures the stability of the movement of the lock block. Once the lock block is clamped into the lock groove, the driving rod cannot rotate freely due to the mechanical cooperation between the lock groove and the lock block, thereby realizing the self-locking function of the hemostat. At this time, even if the doctor releases the operating force on the driving rod, the first clamping arm and the second clamping arm can still maintain the stable clamping of the blood vessel. When unlocking, the second locking tooth is disengaged from the meshing with the first locking tooth by operating the control assembly, and then an external force is applied to rotate the driving rod, the lock block is withdrawn along the lock groove, the self-locking state is released, the elastic traction member drives the sliding rod to reset, and the hemostat is opened.

[0055] The elastic reset principle is:

[0056] The elastic traction member plays an important role in the entire operation of the vascular clamp. One end is connected with the sliding rod, and the other end is connected with the rear end of the handle rod. In the natural state, the elastic traction member is in a stretched state, exerting a backward pulling force on the sliding rod. When the driving rod pushes the sliding rod to move forward to achieve clamping, the elastic traction member is further stretched, storing elastic potential energy. When the self-locking structure is unlocked, the elastic traction member releases the elastic potential energy, pulling the sliding rod to move backward, making the vascular clamp return to the initial open position, ready for the next clamping operation;

[0057] Damping principle:

[0058] The damping structure generates damping force at the hinge shaft of the driving rod and the handle rod through various ways. For example, a nested sleeve structure filled with damping grease is used. When the driving rod rotates, the damping grease between the inner sleeve and the outer sleeve generates shear resistance, hindering the rotation of the inner sleeve relative to the outer sleeve. At the same time, the contact of the rubber strip on the outer surface of the inner sleeve with the inner wall of the outer sleeve and the extrusion of the rubber strip on the damping grease further increases the friction during rotation, thus forming a stable damping effect. The existence of this damping force makes the driving rod always subject to a certain resistance during rotation, whether during the opening and closing operation of the vascular clamp or when approaching the self-locking position, making the operation more stable and precise, effectively avoiding unstable clamping or accidental unlocking due to excessive operation speed or external force interference.

Claims

1. A self-locking blood vessel forceps, comprising a forceps handle rod (10), a first clamping arm (11) is arranged at the front end of the forceps handle rod (10) and is bent to one side, a sliding rod (20) is arranged on the forceps handle rod (10), the sliding rod (20) is in sliding fit with the forceps handle rod (10), a second clamping arm (12) is arranged at the front end of the sliding rod (20), the second clamping arm (12) is arranged in parallel with the first clamping arm (11), a driving assembly (30) for driving the sliding rod (20) to slide is arranged at the rear end of the sliding rod (20), the driving assembly (30) comprises a driving rod (31), the driving rod (31) is hinged on the forceps handle rod (10), characterized in that, The upper end of the driving rod (31) is close to the side of the first clamping arm (11) and abuts against the sliding rod (20), a self-locking structure (40) is arranged between the handle rod (10) and the driving rod (31), which is used for locking the position after the driving rod (31) is rotated to a certain angle, so that the first clamping arm (11) and the second clamping arm (12) remain in the clamping state.

2. The self-locking vessel forceps according to claim 1, wherein, The self-locking structure (40) comprises a lock groove (41) arranged on the handle rod (10) and a lock block (42) arranged on the driving rod (31) and matched with the lock groove (41), when the driving rod (31) is rotated to the appropriate position where the first clamping arm (11) and the second clamping arm (12) are closed, the lock block (42) is clamped into the lock groove (41) to realize self-locking.

3. The self-locking vessel forceps according to claim 2, wherein, A damping structure is arranged at the rotating shaft of the driving rod (31), which is used for increasing the resistance when the driving rod (31) rotates, and the damping structure is a damping sleeve arranged at the hinged part of the handle rod (10) and the driving rod (31).

4. The self-locking vessel forceps according to claim 3, wherein, An arc-shaped driving connecting part is arranged at the end of the sliding rod (20) close to the driving rod (31).

5. The self-locking vessel forceps according to claim 4, wherein, An elastic traction member is arranged on the handle rod (10) for elastic resetting of the sliding rod (20), one end of the elastic traction member is connected with the sliding rod (20), and the other end is connected with the rear end of the handle rod (10).

6. The self-locking vessel forceps according to claim 5, wherein, An adjusting structure is arranged on the handle rod (10) for adjusting the sliding stroke of the sliding rod (20), the adjusting structure comprises an adjusting screw, and the adjusting screw is connected with the end of the elastic traction member away from the sliding rod (20).

7. The self-locking vessel forceps according to claim 6, wherein, A threaded cooperation hole is formed in the rear end of the handle rod (10), and the threaded cooperation hole is connected with the adjusting screw through threaded cooperation.

8. The self-locking vessel forceps according to claim 7, wherein, A handle (13) is arranged on the handle rod (10), and anti-skid textures are arranged on the surface of the handle (13).

9. The self-locking vessel forceps according to claim 8, wherein, A control assembly is arranged on the handle (13) for controlling locking and unlocking of the driving rod (31), the control assembly comprises a first locking tooth arranged at the bottom of the handle (13), a second locking tooth is hinged on the driving rod (31) and matched with the first locking tooth, and a reset torsional spring is arranged at the hinged part of the second locking tooth and the driving rod (31).

10. The self-locking vessel forceps according to claim 9, wherein, Anti-skid protrusions are arranged on the clamping surfaces of the first clamping arm (11) and the second clamping arm (12).

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