Clamping-force-adjustable orthopedic reduction forceps

Abstract

The invention discloses a pair of orthopedic reduction forceps with adjustable clamping force in the technical field of medical instruments, which comprises a first forceps body, a second forceps body and a gill shaft screw, the first forceps body and the second forceps body are rotationally connected through the gill shaft screw, the second forceps body comprises a forceps head fixedly arranged with the gill shaft screw, and the forceps head is rotationally arranged with the first forceps body through the gill shaft screw; the forceps handles are rotationally arranged through gill shaft screws and the forceps heads; two ends of the arch-shaped elastic piece are respectively arranged on the side walls of the forceps head and the forceps handle; the forceps handle drives the forceps head to rotate through the arch-shaped elastic piece; and the clamping force of the clamp head can be controlled only by controlling the position of the clamp handle, so that the requirement on an operator can be weakened.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an orthopedic reduction forceps with adjustable clamping force. Background Art

[0002] A reduction forceps is a medical device that clamps bones during orthopedic surgeries to play a role in fixation and reduction. As Figure 1 shown, it usually consists of a pair of forceps bodies and a hinge shaft screw. The inner surface of the head of the forceps body is mostly provided with teeth, and a locking device is arranged at the middle position between the forceps bodies, generally made of stainless steel. The locking structure is generally composed of a screw and a nut or an arc-shaped rack and a tooth; for the locking structure composed of a screw and a nut, one end of the screw is rotatably connected to one of the forceps bodies, and the other side passes through the other forceps body and is connected to the nut. By rotating the nut, the front ends of the forceps bodies can be restricted from moving away from each other, thereby achieving anti-loosening; for the locking structure composed of an arc-shaped rack and a tooth, the arc-shaped rack and the tooth are respectively fixed on one of the forceps bodies, and anti-loosening is achieved through the meshing of the rack and the tooth;

[0003] In pediatric diagnosis and treatment, with the change of the patient's age, there are also significant density differences in bone quality. At the same time, gender differences will also cause differences in bone density. Especially during the rapid development stage of adolescence, the bone density difference is relatively large, and the endurance will also be quite different;

[0004] When a doctor uses a reduction forceps, after the forceps head contacts the patient's bone structure, the forceps head remains relatively fixed with the bone structure, and a certain force is applied to the bone structure through the forceps head to clamp the bone structure; regardless of which locking structure, it can only limit the front ends of the forceps bodies from moving away from each other, and cannot limit the forceps bodies from moving towards the bone structure; the necessary condition for continuously clamping the bone structure is that the force transmitted to the forceps head needs to be greater than or equal to the force that can fix the bone structure, which means that the clamping force of the forceps head on the bone structure can increase with the exertion force of the hand and the increase in the number of turns of the nut. Refer to Figure 1-2 , the force applied by the forceps body and the clamping force of the forceps head are in a proportional relationship (the proportionality is the ratio a of the lengths of the two force arms centered on the hinge shaft screw, that is, a = L1 / L2). When the clamping is completed, corresponding to Figure 2S2 in it, that is, the displacement of the clamp body; after that, it is necessary to stably apply force to the clamp body until the clamp body is locked. However, during the locking time, if the force applied to the clamp body changes by △f, the clamp head part will quickly generate a response of a△f. The greater the force beyond the part, the greater the damage to the bone structure, and it is easy to cause secondary damage to the bone structure; on the one hand, during the process of applying force to the screw, it belongs to a magnifying lever arm. Therefore, during the screw locking process, the number of turns of rotation is not easy to control, and it is easy to over-clamp, causing damage to the bone structure, especially when there is a bone fracture in the bone structure; on the other hand, the part of the force transmitted from the doctor's hand to the clamp head that is greater than the force capable of fixing the bone structure completely depends on the doctor's experience, which is a great test for the doctor; moreover, when moving the bone structure through the reduction clamp, the doctor needs to increase the force again with the hand to move the reduction clamp. This part of the force cannot all be used to move the bone structure, and a part of the force will be transmitted to the bone structure through the clamp head, further increasing the clamping force on the bone structure and further increasing the damage to the bone structure; whether it is in the clamped state or the state of moving the bone structure, in order to stabilize the clamping and moving stability of the bone structure, the doctor's hand force will continue to increase, as Figure 2 shown, this part of the fluctuating force will be amplified and transmitted to the bone structure, further increasing the risk of bone fracture of the bone structure. Summary of the Invention

[0005] The purpose of the present invention is to provide an orthopedic reduction clamp with adjustable clamping force, which can control the clamping force of the clamp head only by controlling the position of the clamp handle, and can weaken the requirements for the operator.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: an orthopedic reduction clamp with adjustable clamping force, including a first clamp body, a second clamp body and a gill shaft screw. The first clamp body and the second clamp body are rotationally connected through the gill shaft screw, and it is characterized in that:

[0007] The second clamp body includes:

[0008] A clamp head, fixedly arranged with the gill shaft screw and rotationally arranged with the first clamp body through the gill shaft screw;

[0009] A clamp handle, rotationally arranged with the clamp head through the gill shaft screw;

[0010] An arched elastic member, with both ends respectively installed on the side walls of the clamp head and the clamp handle; the clamp handle drives the clamp head to rotate through the arched elastic member.

[0011] As a further solution of the present invention, it further includes a pre-pressure regulator installed between the clamp head and the first clamp body. The pre-pressure regulator is used to adjust the pre-pressure of the arched elastic member, change the locked state of the clamp head and the first clamp body, and the clamping force applied to the bone structure; the pre-pressure regulator includes:

[0012] The connecting piece is slidably arranged inside the pliers head, and its outer end abuts against the outside of the arched elastic piece, and it can move relative to the pliers head along with the deformation of the arched elastic piece;

[0013] The adjusting plate is slidably arranged inside the pliers head;

[0014] The elastic sheet is installed on the adjusting plate, and its outer wall abuts against the connecting piece;

[0015] The adjusting screw is rotatably arranged with the pliers head, and the adjusting screw is threadedly connected with the adjusting plate; it is used to adjust the position of the adjusting plate, and through the change of the elastic force of the elastic sheet, adjust the resistance of the connecting piece to move along with the arched elastic piece.

[0016] As a further solution of the present invention, it further includes a locking structure installed between the pliers head and the first pliers body; the locking structure can be triggered according to the specified deformation amount of the arched elastic piece to lock between the pliers head and the first pliers body;

[0017] The locking structure includes;

[0018] The locking ring is fixedly arranged with the first pliers body;

[0019] The locking piece is radially elastically slidably arranged with the gill shaft screw, and can be engaged with the locking ring, and is used to change the connection state between the pliers head and the first pliers body;

[0020] The control piece is axially elastically slidably arranged inside the gill shaft screw, and a limiting shaft that can be inserted into the locking piece is fixedly arranged inside it. The control piece can be pushed down by the connecting piece, so that the limiting shaft disengages from the locking piece, and the locking piece is engaged with the locking ring.

[0021] As a further solution of the present invention, there is at least one pair of the locking pieces, and each of the locking pieces is fixedly provided with a reset piece, and the end of the reset piece passes through the gill shaft screw.

[0022] As a further solution of the present invention, a fixed shaft is fixedly arranged inside the locking ring, and a locking elastic sheet is fixedly arranged inside the gill shaft screw, and the end of the locking elastic sheet abuts against the fixed shaft.

[0023] As a further solution of the present invention, both ends of the adjusting screw pass through the pliers head.

[0024] As a further solution of the present invention, a rotating shaft is arranged between the connecting piece and the arched elastic piece. The rotating shaft is rotatably arranged with the connecting piece, and the side wall of the rotating shaft abuts against the arched elastic piece.

[0025] As a further solution of the present invention, both the pliers head and the pliers handle are provided with slots for inserting the arched elastic piece.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] In the present invention, by setting an arched elastic member with a pre-tightening force and adjusting the pre-tightening force, a reset clamp with controllable clamping force can be designed. The control means of the final clamping force of the clamp head is transformed from a force arm to displacement. By only controlling the position of the clamp handle, the clamping force of the clamp head can be controlled, which can weaken the requirements for the operator. In addition, by controlling the stiffness coefficient of the arched elastic member, the change amount of the clamping force can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 is a schematic structural diagram of an existing orthopedic reset clamp;

[0030] Figure 2 is a schematic diagram of the force analysis of an existing orthopedic reset clamp;

[0031] Figure 3 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0032] Figure 4 is a schematic diagram of the overall structure of the present invention Figure 2 ;

[0033] Figure 5 is a schematic diagram of the movement states of the clamp handle and the clamp head before clamping of the present invention;

[0034] Figure 6 is a schematic diagram of the movement states of the clamp handle and the clamp handle after clamping of the present invention;

[0035] Figure 7 is the present invention Figure 3 is an enlarged schematic diagram of part A in the present invention;

[0036] Figure 8 is the present invention Figure 4 is an enlarged schematic diagram of part B in the present invention;

[0037] Figure 9 is the present invention Figure 8 is an enlarged schematic diagram of part C in the present invention;

[0038] Figure 10 is a schematic diagram of the structure of the pre-pressure regulator of the present invention;

[0039] Figure 11 is a schematic diagram of the locking structure and its connection relationship of the present invention;

[0040] Figure 12 is the present inventionFigure 11 Schematic diagram of the enlarged structure at D in the middle

[0041] Figure 13 Schematic diagram of the force analysis of the pliers handle and pliers head of the present invention

[0042] Figure 14 Schematic diagram of the installation positions of the incomplete ring groove and the slider of the present invention

[0043] In the drawings, the list of components represented by each reference numeral is as follows:

[0044] 1. First pliers body; 2. Second pliers body; 21. Pliers head; 22. Pliers handle; 23. Arch-shaped elastic member; 24. Connecting member; 25. Slider; 3. Gill shaft screw; 4. Pre-pressure regulator; 41. Adjusting plate; 42. Elastic sheet; 43. Adjusting screw; 44. Incomplete ring groove; 5. Locking structure; 51. Locking ring; 52. Locking member; 53. Control member; 54. Limiting shaft; 55. Teeth; 56. Reset member; 57. Fixed shaft; 58. Locking elastic sheet; 6. Rotating shaft; 7. Slot. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0046] Please refer to Figure 1 - Figure 14 , the present invention provides a technical solution: a clamping force adjustable orthopedic reduction pliers, including a first pliers body 1, a second pliers body 2 and a gill shaft screw 3, and the first pliers body 1 and the second pliers body 2 are rotatably connected by the gill shaft screw 3;

[0047] By holding the middle and rear sections of the first pliers body 1 and the second pliers body 2 by hand, the first pliers body 1 and the second pliers body 2 are rotated around the gill shaft screw 3, and the front ends of the first pliers body 1 and the second pliers body 2 approach each other until the first pliers body 1 and the second pliers body 2 clamp the bone structure to be reduced therein;

[0048] The gill shaft screw 3 is arranged in the middle and front sections of the first pliers body 1 and the second pliers body 2. The first pliers body 1 and the second pliers body 2 are both labor-saving levers that rotate around the axis of the gill shaft screw 3, which can reduce the force required for clamping and reduce the operation difficulty of medical staff;

[0049] The second pliers body 2 includes:

[0050] The pliers head 21, which is fixedly provided with the gill shaft screw 3 and is rotatably arranged with the first pliers body 1 through the gill shaft screw 3;

[0051] The pliers handle 22 is rotatably arranged with the pliers head 21 through the gill axis screw 3; the pliers head 21, the pliers handle 22 and the first pliers body 1 can all rotate around the axis of the gill axis screw 3;

[0052] The arched elastic member 23 has two ends respectively installed on the side walls of the pliers head 21 and the pliers handle 22; the pliers handle 22 drives the pliers head 21 to rotate through the arched elastic member 23;

[0053] In the initial state, there is a pre-pressure in the arched elastic member 23, and the pre-pressure comes from the extrusion between the pliers head 21 and the pliers handle 22. The angle between the pliers head 21 and the pliers handle 22 is fixed in the free state; see Figure 14 , the implementation means includes but is not limited to opening an incomplete annular groove 44 at the hinge joint between the pliers handle 22 and the pliers head 21. A slider 25 fixed on the pliers head 21 is slidably arranged in the incomplete annular groove 44. In the initial state, the pliers head 21 and the pliers handle 22 are subjected to opposite thrusts from the arched elastic member 23, and the pliers head 21 and the pliers handle 22 maintain opposite rotation trends. The slider 25 moves to one side of the incomplete annular groove 44, and the slider 25 and the incomplete annular groove 44 restrict each other, so that the relative fixation between the pliers head 21 and the pliers handle 22 is maintained;

[0054] See Figure 3 - Figure 6 and Figure 13 , when the middle and rear sections of the pliers handle 22 and the first pliers body 1 are simultaneously clenched, the pliers handle 22 rotates relative to the first pliers body 1 around the axis of the gill axis screw 3; at the same time, the pliers handle 22 pushes one end of the arched elastic member 23 to move synchronously. The specific process is divided into three stages:

[0055] The first stage: The inner side of the pliers head 21 does not contact the patient's bone structure, so it is only subjected to the thrust from the pliers handle 22 (that is, the O-S1 section in Figure 13 , where S represents the displacement of the pliers handle 22 relative to the first pliers body 1), and can rotate relative to the first pliers body 1 around the axis of the gill axis screw 3 synchronously with the pliers handle 22 under the push of the arched elastic member 23. The pliers handle 22 and the pliers head 21 remain relatively stationary;

[0056] The second stage: When the pliers head 21 contacts the patient's bone structure, the pliers head 21 maintains the rotation trend. At the same time, due to the reverse acting force from the bone structure, the pliers head 21 hardly rotates until the clamping force of the pliers handle 22 gradually increases and overcomes the pre-tightening force of the arched elastic member 23; during this process, both the gripping force of the pliers handle 22 and the clamping force of the pliers head 21 will increase significantly, but the relative position of the pliers handle 22 and the pliers head 21 hardly moves (that is, the S1-S3 section in Figure 13 , and the distance between S1 and S3 is extremely short, and its essence is equal to the distance of the bone tissue deforming under the pre-tightening force of the arched elastic member 23);

[0057] The third stage: The force on the handle 22 continues to increase to resume rotation. The jaw 21 remains almost stationary relative to the bone structure. The relative displacement between the handle 22 and the jaw 21 causes further elastic deformation of the arched elastic member 23, and the clamping force of the jaw 21 continues to increase (i.e., the section from S3 - S2 in Figure 13 . During this process, the force on the jaw 21 is no longer related to the force applied to the handle 22, and the force on the jaw 21 is only related to the deformation of the arched elastic member 23), until the handle 22 contacts the first jaw body 1.

[0058] By setting the arched elastic member 23 with a pre - tightening force and adjusting the pre - tightening force, a reset forceps with a controllable clamping force can be designed. The control means of the final clamping force of the jaw is transformed from the force arm to displacement. Only by controlling the position of the handle can the clamping force of the jaw be controlled, which can weaken the requirements for the operator. At the same time, by controlling the stiffness coefficient of the arched elastic member 23, the change amount of the clamping force can also be reduced.

[0059] As a further solution of the present invention, it further includes a pre - pressure regulator 4 installed between the jaw 21 and the first jaw body 1. The pre - pressure regulator 4 is used to adjust the pre - pressure of the arched elastic member 23, change the locking state between the jaw 21 and the first jaw body 1, and the clamping force on the bone structure;

[0060] The pre - pressure regulator 4 changes the pre - pressure of the initial state of the arched elastic member 23 by driving the deformation of the arched elastic member 23. After the jaw 21 contacts the bone structure, the difficulty for the bone structure to overcome the arched elastic member 23 increases. When the arched elastic member 23 further deforms, the force on the bone structure also changes accordingly, realizing the adjustment of the clamping force on the bone structure according to the state of the bone structure (such as density, bone fracture condition, bone diameter, etc.);

[0061] The pre - pressure regulator 4 includes:

[0062] An adapter 24 slidably arranged in the jaw 21. The outer end of the adapter 24 abuts against the outer side of the arched elastic member 23 and can move relative to the jaw 21 with the deformation of the arched elastic member 23;

[0063] When the arched elastic member 23 further deforms, the adapter 24 is subjected to the pulling force of the arched elastic member 23 and moves synchronously in the direction of the deformation of the arched elastic member 23;

[0064] A regulating plate 41 slidably arranged in the jaw 21;

[0065] A resilient piece 42 installed on the regulating plate 41, and the outer wall of the resilient piece 42 abuts against the adapter 24;

[0066] The adjusting screw rod 43 is rotatably arranged with the clamping head 21, and the adjusting screw rod 43 is in threaded connection with the adjusting plate 41; it is used to adjust the position of the adjusting plate 41, and through the elastic force change of the elastic sheet 41, adjust the resistance of the connecting piece 24 moving along with the arched elastic piece 23;

[0067] Specifically, refer to Figure 7 and Figure 10 , by rotating the adjusting screw rod 43 to drive the adjusting plate 41 to move relative to the connecting piece 24, the adjusting plate 41 drives the side of the elastic sheet 42 close to the adjusting plate 41 to move towards the connecting piece 24, so that the elastic sheet 42 is compressed, changing the pre-pressure of the elastic sheet 42 on the connecting piece 24 in the initial stage, so that when the arched elastic piece 23 further deforms, the initial force driving the connecting piece 24 to move changes, thereby changing the force required when the locking structure 5 is triggered, and changing the force received when the clamping head 21 is locked with the first pliers body 1; making the clamping force between the clamping head 21 and the first pliers body 1 adjustable.

[0068] As a further solution of the present invention, it further includes; a locking structure 5 installed between the clamping head 21 and the first pliers body 1; the locking structure 5 can be triggered according to the specified deformation amount of the arched elastic piece 23, so that the clamping head 21 is locked with the first pliers body 1;

[0069] When the relative displacement amount between the pliers handle 22 and the clamping head 21 causes the arched elastic piece 23 to further elastically deform (S3 - S2), after the arched elastic piece 23 reaches the specified deformation amount, the locking structure 5 is triggered, so that the clamping head 21 and the first pliers body 1 are relatively fixed; the clamping force of the clamping head 21 on the bone structure no longer increases, realizing triggering the locking structure 5 according to the specified deformation amount of the arched elastic piece 23, so that the clamping head 21 and the first pliers body 1 are relatively fixed;

[0070] The locking structure 5 includes;

[0071] A locking ring 51, fixedly arranged with the first pliers body 1;

[0072] A locking member 52, radially elastically slidably arranged with the gill shaft screw 3, and can be engaged with the locking ring 51 (in this embodiment, tooth teeth 55 are provided on the adjacent sides of the locking ring 51 and the locking member 52, and the locking member 52 can be engaged with the locking ring 51 through the tooth teeth 55), used to change the connection state between the clamping head 21 and the first pliers body 1;

[0073] A control member 53, axially elastically slidably arranged (in this embodiment, it is connected by a spring, and the two ends are respectively connected with the gill shaft screw 3 and the locking member 52, and a connecting member connected with the spring is fixedly arranged inside the gill shaft screw 3) inside the gill shaft screw 3, and a limiting shaft 54 that can be inserted into the locking member 52 is fixedly arranged inside. When the limiting shaft 54 is inserted into the locking member 52, the locking member 52 is in a force storage state. The control member 53 can be squeezed and lowered by the connecting piece 24, so that the limiting shaft 54 disengages from the locking member 52, and the locking member 52 moves under the action of elastic force and engages with the locking ring 51;

[0074] Specifically, refer to Figure 8 , Figure 11 and Figure 12 , when the connecting piece 24 moves with the deformation of the arch-shaped elastic piece 23, the control piece 53 is extruded by the arch-shaped elastic piece 23 and moves along the axis of the gill shaft screw 3 towards the locking piece 52. The locking piece 52 moves radially along the gill shaft screw 3 under extrusion. The locking piece 52 drives the limiting shaft 54 to move. The limiting shaft 54 disengages from the locking piece 52. The locking piece 52 moves under the action of elastic force and engages with the locking ring 51 through the teeth 55, so that the jaw 21 is relatively fixed to the first jaw body 1, and the clamping force between the jaw 21 and the first jaw body 1 is kept relatively constant, realizing the triggering of the locking structure 5 according to the specified deformation amount of the arch-shaped elastic piece 23, and making the jaw 21 relatively fixed to the first jaw body 1.

[0075] In summary, by arranging the arch-shaped elastic piece 23 between the jaw 21 and the jaw handle 22, the jaw 21 and the jaw handle 22 can move synchronously and remain relatively stationary in the initial state. When the jaw 21 and the first jaw body 1 jointly clamp the patient's bone structure, the locking structure 5 is triggered by the deformation of the arch-shaped elastic piece 23, so that the jaw 21 and the first jaw body 1 are locked. The jaw handle 22 continues to rotate under force, and the angle between the jaw 21 and the first jaw body 1 no longer increases, thereby avoiding the continuous increase of the clamping force of the jaw 21 on the bone structure, and further avoiding the involuntary increase of the force by the doctor's hand in order to stabilize the clamping of the bone structure and the movement of the bone structure, resulting in the continuous increase of the clamping force of the bone structure and causing secondary injuries; and the jaw handle 22 can rotate to contact the first jaw body 1, so that the medical staff can keep the same opening of the hand each time, which is convenient for the medical staff to hold the reduction forceps and apply the force to drive the movement of the bone structure, and avoids the excessive opening of the hand being unfavorable for applying force and operation.

[0076] As a further solution of the present invention, there is at least one pair of locking pieces 52, and each locking piece 52 is fixedly provided with a reset piece 56. The end of the reset piece 56 passes through the gill shaft screw 3 and slides radially;

[0077] Specifically, refer to Figure 8 , Figure 11 and Figure 12 , after the reduction forceps is used, loosen the jaw handle 22 and move the reset piece 56 towards the center of the gill shaft screw 3. The reset piece 56 drives the locking pieces 52 to approach each other. The arch-shaped elastic piece 24 rebounds and the connecting piece 24 resets. Since the locking piece 52 moves at this time, the limiting shaft 54 cannot be inserted into the limiting piece 52, and the control piece 53 maintains the reset trend; when the locking piece 52 is completely disengaged from the locking ring 51, the limiting shaft 54 is inserted into the limiting piece 52, so that the limiting piece 52 returns to the energy storage state, and the fixed state between the jaw 21 and the first jaw body 1 is released.

[0078] As a further solution of the present invention, a fixed shaft 57 is fixedly arranged inside the locking ring 51, and a locking elastic piece 58 is fixedly arranged inside the gill shaft screw 3. The end of the locking elastic piece 58 abuts against the fixed shaft 57;

[0079] Specifically, when the limiting member 52 is moved by the reset member 56, the fixed shaft 57 moves accordingly and pushes the end of the locking elastic piece 58 in contact with it to move, so that the locking elastic piece 58 stores energy, which is convenient for the reset member 56 to pop out instantly, fixing the clamping head 21 to the first clamping body 1, and can shorten the time for the clamping head 21 to switch from the rotating state to the fixed state with the first clamping body 1, improving the accuracy of the clamping force of the reset forceps.

[0080] As a further solution of the present invention, both ends of the adjusting screw 43 penetrate through the clamping head 21; it is convenient to rotate the adjusting screw 43 from any one of the two ends to change the pre-pressure of the elastic piece 42 on the connecting member 24.

[0081] As a further solution of the present invention, a rotating shaft 6 is arranged between the connecting member 24 and the arch-shaped elastic member 23. The rotating shaft 6 is rotatably arranged with the connecting member 24, and the side wall of the rotating shaft 6 abuts against the arch-shaped elastic member 23; the rotating shaft 6 can reduce the friction between the connecting member 24 and the arch-shaped elastic member 23.

[0082] As a further solution of the present invention, both the clamping head 21 and the clamping handle 22 are provided with slots 7 for inserting the arch-shaped elastic member 23; holding one end of the arch-shaped elastic member 23 and pulling it outwards can pull out the arch-shaped elastic member 23 from the clamping head 21 or the clamping handle 22, which is convenient for replacing the clamping head 21 and the clamping handle 22.

Claims

1. An orthopedic reduction forceps with adjustable clamping force, comprising a first forceps body (1), a second forceps body (2) and a gill axis screw (3). The first forceps body (1) and the second forceps body (2) are rotatably connected by the gill axis screw (3), and it is characterized in that: The second forceps body (2) includes: A forceps head (21), fixedly arranged with the gill axis screw (3) and rotatably arranged with the first forceps body (1) through the gill axis screw (3); A forceps handle (22), rotatably arranged with the forceps head (21) through the gill axis screw (3); An arch-shaped elastic member (23), with both ends respectively installed on the side walls of the forceps head (21) and the forceps handle (22); the forceps handle (22) drives the forceps head (21) to rotate through the arch-shaped elastic member (23).

2. The adjustable clamping force type orthopedic reduction forceps according to claim 1, characterized in that: It further includes a pre-pressure regulator (4) installed between the forceps head (21) and the first forceps body (1). The pre-pressure regulator (4) is used to adjust the pre-pressure of the arch-shaped elastic member (23), change the locking state between the forceps head (21) and the first forceps body (1), and the clamping force applied to the bone structure; The pre-pressure regulator (4) includes: An adapter (24), slidably arranged in the forceps head (21), with the outer side end abutting against the outer side of the arch-shaped elastic member (23) and capable of moving relative to the forceps head (21) along with the deformation of the arch-shaped elastic member (23); An adjusting plate (41), slidably arranged in the forceps head (21); A resilient piece (42), installed on the adjusting plate (41), and the outer side wall abuts against the adapter (24); An adjusting screw (43), rotatably arranged with the forceps head (21), and the adjusting screw (43) is threadedly connected with the adjusting plate (41); used to adjust the position of the adjusting plate (41), and adjust the resistance of the adapter (24) moving along with the arch-shaped elastic member (23) through the change of the elastic force of the resilient piece (41).

3. The adjustable clamping force type orthopedic reduction forceps according to claim 2, characterized in that: It further includes a locking structure (5) installed between the forceps head (21) and the first forceps body (1); the locking structure (5) can be triggered according to a specified deformation amount of the arch-shaped elastic member (23) to lock between the forceps head (21) and the first forceps body (1); The locking structure (5) includes; A locking ring (51), fixedly arranged with the first forceps body (1); A locking member (52), radially and elastically slidably arranged with the gill axis screw (3), capable of meshing with the locking ring (51), and used to change the connection state between the forceps head (21) and the first forceps body (1); A control member (53), axially and elastically slidably arranged in the gill axis screw (3), and internally fixedly provided with a limiting shaft (54) that can be inserted into the locking member (52). The control member (53) can be pushed down by the adapter (24) to make the limiting shaft (54) disengage from the locking member (52), and the locking member (52) meshes with the locking ring (51).

4. The adjustable clamping force type orthopedic reduction forceps according to claim 3, characterized in that: There are at least a pair of the locking members (52), and each of the locking members (52) is fixedly provided with a reset member (56), and the end of the reset member (56) passes through the gill axis screw (3).

5. The adjustable clamping force type orthopedic reduction forceps according to claim 4, characterized in that: A fixed shaft (57) is fixedly arranged in the locking ring (51), and a locking elastic piece (58) is fixedly arranged in the gill axis screw (3), and the end of the locking elastic piece (58) abuts against the fixed shaft (57).

6. The adjustable clamping force type orthopedic reduction forceps according to claim 2, wherein: Both ends of the adjusting screw (43) pass through the forceps head (21).

7. The adjustable clamping force type orthopedic reduction forceps according to claim 2, characterized in that: A rotating shaft (6) is arranged between the connecting piece (24) and the arched elastic piece (23). The rotating shaft (6) is rotatably arranged with the connecting piece (24), and the side wall of the rotating shaft (6) abuts against the arched elastic piece (23).

8. A clamping force adjustable orthopedic reduction forceps according to claim 1, characterized in that: The clamping head (21) and the clamping handle (22) are both provided with slots (7) for inserting the arched elastic piece (23).

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