Surgical bent forceps

Abstract

The surgical bent forceps comprise a bent forceps tube body, one end of the bent forceps tube body is provided with a forceps head mechanism, and the other end of the bent forceps tube body is provided with a handle assembly; the tong head mechanism comprises a connecting piece, a connecting rod assembly installed in the connecting piece, and an upper tong head and a lower tong head which are installed on the connecting rod assembly. One end of the connecting piece is rotationally connected with the bent clamp pipe body; the handle assembly comprises two mounting parts and two handle parts, one mounting part is connected with the bent clamp pipe body, and the other mounting part is provided with an angle adjusting mechanism with a knob; a traction assembly is arranged in the bent pincer pipe body, one end of the traction assembly extends into the connecting piece to be connected with the connecting rod assembly, and the other end of the traction assembly extends out of the bent pincer pipe body to be rotationally connected with the installation part of the installation angle adjusting mechanism and extends out of the installation part to be connected with the angle adjusting mechanism. By arranging the angle adjusting mechanism, the forceps head mechanism can be driven to rotate, and the problem that a forceps head and an operating forceps body of an existing operating forceps cannot rotate relatively is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of surgical instruments, and in particular relates to a surgical curved forceps. Background Art

[0002] Compared with traditional surgery, laparoscopic surgery has the advantages of small incision, less pain and quick recovery, so it is widely used. In laparoscopic surgery, the separation, angiography, resection, lymph node dissection and electrocoagulation hemostasis of tissues and organs in the human abdominal cavity usually require the cooperation of multiple instruments and forceps to perform the operation. The existing laparoscopic surgical forceps usually have a straight rod, and the rod, forceps head and handle are all in the same straight line. When two surgical forceps and a laparoscopic camera system light source are inserted into the human abdominal cavity from the same incision for surgery, if the two straight operating forceps pass through the same small operating hole, the handles of the two operating forceps will be very close, so it is difficult to separate, knot, suture and other operations on tissues and organs.

[0003] In the prior art, the forceps head and the forceps body of the surgical forceps usually cannot rotate relative to each other. However, when performing an operation, the forceps head usually needs to be rotated to a certain angle to perform the corresponding operation. Therefore, the operator's hand and the surgical forceps can only be rotated together to continue the operation. However, if the arm and the surgical forceps are maintained in a certain posture for a long time, the operator will be tired. Therefore, a surgical curved forceps with a rotating forceps head is needed. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a surgical curved forceps. By setting a curved forceps tube body, the forceps head mechanism and the handle assembly are not in the same straight line; by setting an angle adjustment mechanism, the forceps head mechanism can be driven to rotate, thereby solving the problem that the forceps head and the surgical forceps body of the existing surgical forceps cannot rotate relative to each other.

[0005] The present invention provides the following technical solutions:

[0006] A surgical curved forceps comprises a curved forceps tube body, one end of which is provided with a forceps head mechanism, and the other end of which is provided with a handle assembly; the forceps head mechanism comprises a hollow connecting piece, a connecting rod assembly installed in the connecting piece, an upper forceps head and a lower forceps head installed in the connecting rod assembly and located outside the connecting piece; one end of the connecting piece is rotatably connected to the curved forceps tube body; the handle assembly comprises two mounting parts and two handle parts, one mounting part is connected to the curved forceps tube body, and an angle adjustment mechanism with a knob is installed on the other mounting part; a traction assembly is provided in the curved forceps tube body, and one end of the traction assembly extends into the connecting piece The traction assembly is connected to the connecting rod assembly, and the other end of the traction assembly extends out of the bending pliers tube body and is rotatably connected to the mounting part of the angle adjustment mechanism and extends out of the mounting part to be connected to the angle adjustment mechanism; the two handle parts of the handle assembly are held by hand to make the handle part away from the bending pliers tube body approach the handle part close to the bending pliers tube body, so as to drive the mounting part of the angle adjustment mechanism to move away from the other mounting part; the mounting part of the angle adjustment mechanism pulls the traction assembly and the connecting rod assembly to make the upper pliers head and the lower pliers head approach each other; turning the knob of the angle adjustment mechanism drives the traction assembly to rotate, and the traction assembly drives the pliers head mechanism to rotate.

[0007] Furthermore, the angle adjustment mechanism includes a shell and a gear reduction assembly installed in the shell, one end of the knob extends into the shell and is connected to the input shaft of the gear reduction assembly, and one end of the traction assembly extends into the shell and is connected to the output shaft of the gear reduction assembly.

[0008] Furthermore, the gear reduction assembly includes an internal gear, a center wheel, a planetary wheel carrier and three planetary wheels, the three planetary wheels are located on the outer periphery of the center wheel and are respectively meshed with the center wheel, the three planetary wheels are located in the internal gear and are all meshed with the internal gear, and the internal gear is located in the shell and is integrally formed with the shell; the mounting shaft of the center wheel is connected to the knob extending into the shell, the mounting shafts of the three planetary wheels are all installed on the planetary wheel carrier, and the traction assembly extending into the shell is connected to the planetary wheel carrier.

[0009] Furthermore, the three planetary gears are evenly distributed around the central gear in the circumferential direction.

[0010] Furthermore, the traction assembly includes a first connecting rod, a flexible connecting piece, a second connecting rod, a universal joint and a third connecting rod connected in sequence, the first connecting rod, the flexible connecting piece and the second connecting rod are rotationally connected in sequence, the second connecting rod, the universal joint and the third connecting rod are fixedly connected in sequence, one end of the first connecting rod is connected to the connecting rod assembly, one end of the third connecting rod is rotationally connected to the mounting part of the angle adjustment mechanism and extends out of the mounting part to be connected to the angle adjustment mechanism; the first connecting rod and the second connecting rod are respectively located in the straight pipe section of the bending clamp tube body; the flexible connecting piece is located in the bending pipe section of the bending clamp tube body, and the two ends of the flexible connecting piece respectively extend to the two straight pipe sections of the bending clamp tube body.

[0011] Furthermore, the curved pipe section of the bending clamp pipe body is located between the two straight pipe sections; the center lines of the two straight pipe sections are respectively tangent to the center lines of the curved pipe sections.

[0012] Furthermore, the flexible connector includes multiple connecting blocks; the two ends of the connecting block are respectively marked as the first end and the second end; the first end is U-shaped and includes two ear plates, each of which is provided with a mounting hole, and a first rotating shaft is respectively installed on both sides of the second end; between two adjacent connecting blocks, the two first rotating shafts of one connecting block are respectively rotatably connected to the two mounting holes of the other connecting block.

[0013] Furthermore, the two mounting holes of the connecting block are coaxially arranged, and the two first rotating shafts of the connecting block are coaxially arranged; when observed from one side of the first end of the connecting block to one side of the second end, the axis of the first rotating shaft intersects with the axis of the mounting hole, and the angle between the axes is 120°.

[0014] Furthermore, the handle assembly includes two handles; one end of the handle is a mounting portion, and the other end of the handle is a handle portion; a connecting portion is provided between the mounting portion and the handle portion, the two connecting portions of the two handles are rotatably connected, and an elastic steel sheet for resetting the handle portion is installed between the two handle portions.

[0015] Furthermore, the connecting rod assembly includes connecting rod 1, connecting rod 2, connecting rod 3 and connecting rod 4, one end of connecting rod 1 and connecting rod 2 are respectively rotatably connected to the traction assembly, and the other ends of connecting rod 1 and connecting rod 2 are respectively rotatably connected to connecting rod 3 and connecting rod 4; connecting rod 3 and connecting rod 4 are rotatably connected through a second rotating shaft in an X shape, and both ends of the second rotating shaft are respectively connected to the connecting parts; one end of connecting rod 3 away from connecting rod 1 is connected to the upper clamp head, and one end of connecting rod 4 away from connecting rod 2 is connected to the lower clamp head.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting the curved forceps tube body, the forceps head mechanism and the handle assembly can be neither in the same straight line nor in the same plane. When the surgical curved forceps pass through the same small operating hole, there will be a sufficient gap between the handles of the two surgical curved forceps to avoid interference between the handles of the two surgical curved forceps. Therefore, the surgical curved forceps of the present invention can conveniently perform operations such as separation, knotting, and suturing of tissues and organs.

[0018] 2. By setting up an angle adjustment mechanism, when the clamp head mechanism of the surgical curved forceps needs to be rotated, the angle of the clamp head mechanism can be adjusted by turning the knob; therefore, the operator's arm can be placed in a suitable position, and then by adjusting the angle adjustment mechanism, the clamp head mechanism can be at a corresponding angle, thereby alleviating the fatigue of the operator's arm.

[0019] 3. By setting a gear reduction assembly, when the knob of the angle adjustment mechanism is rotated, the rotation speed of the knob is reduced by the gear reduction assembly, so the rotation speed transmitted to the traction assembly and the clamp head mechanism is lower, so the rotation of the clamp head mechanism is slower, so the operator can accurately rotate the clamp head mechanism to the corresponding angle.

[0020] 4. By providing a flexible connector and a universal joint, when the traction assembly is pulled, the traction assembly located in the bending clamp tube body can smoothly drive the connecting rod assembly to bring the upper clamp head and the lower clamp head closer to each other.

[0021] 5. By twisting the first end of the connecting block by 120° relative to the second end, the multiple connecting blocks of the flexible connecting member are arranged with three connecting blocks as a structural period, so that the flexible connecting member can transmit tension and torque more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of surgical curved forceps in Embodiment 1 of the present invention.

[0023] Figure 2 It is a schematic structural diagram of the traction assembly and the handle assembly in the first embodiment of the present invention.

[0024] Figure 3 Schematic diagram of the connection relationship between the second connecting rod, the universal joint and the third connecting rod in the first embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the gear reduction assembly in the first embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of the structure of the flexible connector in the first embodiment of the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the connection block in the first embodiment of the present invention.

[0028] Figure 7 The figure is a schematic diagram of the connection relationship between the connecting block and the mounting block in the first embodiment of the present invention.

[0029] Figure 8 Schematic diagram of the structure of the connecting rod assembly in the first embodiment of the present invention.

[0030] Fig. 9 It is a schematic diagram of the structure of the connecting piece in the first embodiment of the present invention.

[0031] Numbers in the figure: bending pliers tube body 1, straight pipe section 11, bending pipe section 12, pliers head mechanism 2, connecting rod assembly 21, connecting rod one 211, connecting rod two 212, connecting rod three 213, connecting rod four 214, second rotating shaft 215, upper pliers head 22, lower pliers head 23, connecting member 24, connecting hole 241, slide groove 242, center hole 243, sliding member 244, handle assembly 3, mounting portion 31, handle portion 32, handle 33, connecting portion 34, angle adjustment mechanism 4, knob 41, housing 42, gear reduction assembly 43, internal gear 44, center wheel 45, planetary wheel carrier 46, planetary wheel 47, elastic steel sheet 5, traction assembly 6, first connecting rod 61, flexible connecting member 62, connecting block 621, ear plate 622, mounting hole 623, first rotating shaft 624, mounting block 625, second connecting rod 63, universal joint 64, third connecting rod 65. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0033] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0034] Embodiment 1:

[0035] like Figure 1 and Figure 2As shown, this embodiment provides a surgical curved forceps, including a curved forceps tube body 1, one end of the curved forceps tube body is provided with a forceps head mechanism 2, and the other end of the curved forceps tube body 1 is provided with a handle assembly 3; the forceps head mechanism 2 includes a hollow connecting piece 24, a connecting rod assembly 21 installed in the connecting piece, an upper forceps head 22 and a lower forceps head 23 installed on the connecting rod assembly and located outside the connecting piece 24; one end of the connecting piece 24 is rotatably connected to the curved forceps tube body 1; the handle assembly 3 includes two mounting portions 31 and two handle portions 32, one mounting portion 31 is connected to the curved forceps tube body 1, and the other mounting portion 31 is provided with an angle adjustment mechanism 4 with a knob 41; a traction assembly 6 is provided in the curved forceps tube body 1, one end of the traction assembly It extends into the connecting piece 24 and is connected to the connecting rod assembly 21, and the other end of the traction assembly extends out of the bending pliers tube body and is rotatably connected to the mounting part 31 of the mounting angle adjustment mechanism and extends out of the mounting part to be connected to the angle adjustment mechanism 4; the two handle parts 32 of the handle assembly are held by hand, so that the handle part 32 away from the bending pliers tube body 1 is moved closer to the handle part close to the bending pliers tube body, so as to drive the mounting part of the mounting angle adjustment mechanism 4 away from the other mounting part 31; the mounting part 31 of the mounting angle adjustment mechanism 4 pulls the traction assembly 6 and the connecting rod assembly 21, so that the upper pliers head 22 and the lower pliers head 23 are close to each other; the knob 41 of the rotating angle adjustment mechanism 4 drives the traction assembly 6 to rotate, and the traction assembly drives the pliers head mechanism 2 to rotate.

[0036] like Fig. 9 As shown, in this embodiment, an annular sliding groove 242 is provided on the outer wall of the connecting member 24 along its circumference, and one end of the connecting member 24 having the sliding groove 242 is inserted into the bending clamp tube body 1, and a sliding member 244 is slidably provided in the sliding groove 242, and one end of the sliding member 244 is connected to the inner wall of the bending clamp tube body 1. By providing the sliding member 244, an axial constraint is formed between the connecting member 24 and the bending clamp tube body 1; two connecting holes 241 for installing the second rotating shaft 215 are provided on the connecting member 24; the end of the connecting member 24 connected to the bending clamp tube body 1 has an internal cavity with a smaller diameter than the internal cavity of the other end to form a center hole 243, and the first connecting rod 61 is slidably provided in the center hole 243.

[0037] like Figure 8 As shown, in this embodiment, the outer edges and corners of the upper clamp head 22 and the lower clamp head 23 are rounded; the surfaces of the upper clamp head 22 and the lower clamp head 23 for clamping tissues are provided with serrated teeth.

[0038] like Figure 3 As shown, the angle adjustment mechanism 4 includes a shell 42 and a gear reduction assembly 43 installed in the shell, one end of the knob 41 extends into the shell 42 and is connected to the input shaft of the gear reduction assembly 43, and one end of the traction assembly 6 extends into the shell 42 and is connected to the output shaft of the gear reduction assembly 43.

[0039] In this embodiment, the third connecting rod 65 of the traction assembly extends into the housing 42 and is connected to the output shaft of the gear reduction assembly 43 .

[0040] like Figure 4 As shown, the gear reduction assembly 43 includes an internal gear 44, a center wheel 45, a planetary wheel carrier 46 and three planetary wheels 47. The three planetary wheels 47 are evenly distributed around the center wheel 45 and mesh with the center wheel 45 respectively. The three planetary wheels 47 are located in the internal gear and mesh with the internal gear 44. The internal gear 44 is located in the shell and is integrally formed with the shell 42; the mounting shaft of the center wheel 45 is connected to the knob 41 extending into the shell, the mounting shafts of the three planetary wheels 47 are all installed on the planetary wheel carrier 46, and the traction assembly 6 extending into the shell is connected to the planetary wheel carrier 46.

[0041] In this embodiment, the third connecting rod 65 of the traction assembly extends into the housing 42 and is connected to the central axis of the planetary wheel carrier 46 .

[0042] like Figure 2 and Figure 3 As shown, the traction assembly 6 includes a first connecting rod 61, a flexible connecting member 62, a second connecting rod 63, a universal joint 64 and a third connecting rod 65 connected in sequence. The first connecting rod 61, the flexible connecting member 62 and the second connecting rod 63 are rotationally connected in sequence, and the second connecting rod 63, the universal joint 64 and the third connecting rod 65 are fixedly connected in sequence. One end of the first connecting rod 61 is connected to the connecting rod assembly 21, and one end of the third connecting rod 65 is rotationally connected to the mounting portion 31 of the mounting angle adjustment mechanism 4 and extends out of the mounting portion to be connected to the angle adjustment mechanism; the first connecting rod 61 and the second connecting rod 63 are respectively located in the straight pipe section 11 of the bending clamp tube body 1; the flexible connecting member 62 is located in the bending pipe section 12 of the bending clamp tube body 1, and the two ends of the flexible connecting member 62 respectively extend to the two straight pipe sections of the bending clamp tube body 1.

[0043] like Figure 8 As shown, in this embodiment, one end of the first connecting rod 61 is rotatably connected to the connecting rod 1 211 and the connecting rod 212 respectively; Figure 3 and Figure 4 As shown, one end of the third connecting rod 65 is rotatably connected to the mounting portion 31 of the mounting angle adjustment mechanism 4 and extends out of the mounting portion, extends into the housing 42 and is connected to the planetary wheel carrier 46 , and the housing 42 is rotatably connected to the third connecting rod 65 .

[0044] like Figure 1 As shown, the curved pipe body 1 includes a curved pipe section 12 and two straight pipe sections 11; the curved pipe section 12 is located between the two straight pipe sections 11; and the center lines of the two straight pipe sections 11 are tangent to the center lines of the curved pipe sections 12 respectively.

[0045] In this embodiment, the angle between the center lines of the two straight pipe sections 11 is 95° to 170°. By controlling the angle between the center lines of the two straight pipe sections 11 within the range of 95° to 170°, the self-rotation resistance of the clamp head mechanism 2 can be relatively reduced, and the fatigue of the operator's arm can be reduced; 120° is used in this embodiment.

[0046] like Figure 5 and Figure 6 As shown, the flexible connector 62 includes a plurality of connecting blocks 621; the two ends of the connecting blocks are respectively marked as a first end and a second end; the first end is U-shaped and includes two ear plates 622, each of which is provided with a mounting hole 623, and a first rotating shaft 624 is respectively installed on both sides of the second end; between two adjacent connecting blocks 621, the two first rotating shafts 624 of one connecting block 621 are respectively rotatably connected to the two mounting holes 623 of the other connecting block 621.

[0047] like Figure 7 As shown, in this embodiment, the end of the connecting block 621 close to the first connecting rod 61 connected to the first connecting rod 61 is the first end portion (i.e., the two ear plates 622), and a mounting block 625 is rotatably connected between the two ear plates 622, and the mounting block 625 is connected to the first connecting rod 61.

[0048] In this embodiment, the ear plate 622 is made of an elastic material, such as a steel sheet, etc. When assembling the connecting block 621, the two ear plates 622 are opened so that the ear plates 622 are sleeved on the first rotating shaft 624 through the mounting hole 623 to form a shaft-hole fit.

[0049] The two mounting holes 623 of the connecting block 621 are coaxially arranged, and the two first rotating shafts 624 of the connecting block 621 are coaxially arranged; when observing from one side of the first end of the connecting block 621 to one side of the second end, the axis of the first rotating shaft 624 intersects with the axis of the mounting hole 623, and the angle between the axes is 120°.

[0050] In this embodiment, the diameter of the mounting hole 623 is greater than the diameter of the first rotating shaft 624 , the first rotating shaft 624 is inserted into the mounting hole 623 , and the gap between the first rotating shaft 624 and the mounting hole 623 is filled with a filler made of elastic soft glue.

[0051] like Figure 1 and Figure 2 As shown, the handle assembly includes two handles 33; one end of the handle 33 is a mounting portion 31, and the other end of the handle 33 is a handle portion 32; a connecting portion 34 is provided between the mounting portion 31 of the handle 33 and the handle portion 32, the two connecting portions 34 of the two handles 33 are rotatably connected, and an elastic steel sheet 5 for resetting the handle portion 32 is installed between the two handle portions 32.

[0052] like Figure 8As shown, the connecting rod assembly 21 includes a connecting rod 1 211, a connecting rod 212, a connecting rod 3 213 and a connecting rod 4 214. One end of the connecting rod 1 211 and the connecting rod 2 212 are respectively rotatably connected to the traction assembly 6, and the other ends of the connecting rod 1 211 and the connecting rod 2 212 are respectively rotatably connected to the connecting rod 3 213 and the connecting rod 4 214; the connecting rod 3 213 and the connecting rod 4 214 are rotatably connected through a second rotating shaft 215 in an X-shape, and both ends of the second rotating shaft 215 are respectively connected to the connecting member 24; one end of the connecting rod 3 213 away from the connecting rod 1 211 is connected to the upper clamp head 22, and one end of the connecting rod 4 214 away from the connecting rod 2 212 is connected to the lower clamp head 23.

[0053] In this embodiment, one end of the connecting rod 1 211 and one end of the connecting rod 212 are respectively rotatably connected to the first connecting rod 61 of the traction assembly 6 .

[0054] Working principle:

[0055] When the upper forceps head 22 and the lower forceps head 23 clamp tissue: hold the two handle parts 32 of the handle assembly 3, and make the handle part 32 away from the curved forceps tube body 1 approach the handle part 32 close to the curved forceps tube body 1, so as to drive the mounting part of the installation angle adjustment mechanism 4 away from the other mounting part 31; the mounting part 31 of the installation angle adjustment mechanism 4 pulls the traction assembly 6 and the connecting rod assembly 21, so that the upper forceps head 22 and the lower forceps head 23 are close to each other; after clamping the tissue, release the handle part 32 of the handle assembly 3, the deformed elastic steel sheet 5 begins to reset, the mounting part of the installation angle adjustment mechanism 4 approaches the other mounting part 31, and the mounting part 31 of the installation angle adjustment mechanism 4 pushes the traction assembly 6 and the connecting rod assembly 21, so that the upper forceps head 22 and the lower forceps head 23 are away from each other (the jaws are open).

[0056] When the head of the surgical curved forceps needs to be rotated: the knob 41 of the angle adjustment mechanism 4 is turned to drive the traction assembly 6 to rotate around its own axis in the curved forceps tube body, and the traction assembly drives the head mechanism 2 to rotate, so that the head of the surgical curved forceps rotates to a corresponding angle.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A surgical curved forceps, characterized in that: The invention comprises a bending pliers tube body (1), one end of which is provided with a pliers head mechanism (2), and the other end of which is provided with a handle assembly (3); The clamp head mechanism (2) comprises a hollow connecting piece (24), a connecting rod assembly (21) installed in the connecting piece, an upper clamp head (22) and a lower clamp head (23) installed on the connecting rod assembly and located outside the connecting piece (24); one end of the connecting piece (24) is rotatably connected to the bending clamp tube body (1); The handle assembly (3) comprises two mounting parts (31) and two handle parts (32), one mounting part (31) is connected to the bending forceps tube body (1), and the other mounting part (31) is equipped with an angle adjustment mechanism (4) having a knob (41); A traction assembly (6) is provided in the bending clamp tube body (1), one end of the traction assembly extends into the connecting piece (24) and is connected to the connecting rod assembly (21), and the other end of the traction assembly extends out of the bending clamp tube body and is rotatably connected to a mounting portion (31) for mounting an angle adjustment mechanism and extends out of the mounting portion to be connected to the angle adjustment mechanism (4); The two handle parts (32) of the handle assembly are held by hand, so that the handle part (32) away from the curved pliers tube body (1) is moved closer to the handle part close to the curved pliers tube body, thereby driving the mounting part of the mounting angle adjustment mechanism (4) away from the other mounting part (31); the mounting part (31) of the mounting angle adjustment mechanism (4) pulls the traction assembly (6) and the connecting rod assembly (21), so that the upper pliers head (22) and the lower pliers head (23) are moved closer to each other; The knob (41) of the rotating angle adjustment mechanism (4) drives the traction assembly (6) to rotate, and the traction assembly drives the clamp head mechanism (2) to rotate.

2. A surgical curved forceps according to claim 1, characterized in that: The angle adjustment mechanism (4) comprises a housing (42) and a gear reduction assembly (43) installed in the housing, one end of the knob (41) extends into the housing (42) and is connected to an input shaft of the gear reduction assembly (43), and one end of the traction assembly (6) extends into the housing (42) and is connected to an output shaft of the gear reduction assembly (43).

3. A surgical curved forceps according to claim 2, characterized in that: The gear reduction assembly (43) comprises an internal gear (44), a center wheel (45), a planetary wheel carrier (46) and three planetary wheels (47); the three planetary wheels (47) are located on the outer periphery of the center wheel (45) and mesh with the center wheel respectively; the three planetary wheels (47) are located in the internal gear (44) and mesh with the internal gear; the internal gear (44) is located in the housing and is integrally formed with the housing (42); the mounting shaft of the center wheel (45) is connected to a knob (41) extending into the housing; the mounting shafts of the three planetary wheels (47) are all mounted on the planetary wheel carrier (46); and the traction assembly (6) extending into the housing is connected to the planetary wheel carrier (46).

4. A surgical curved forceps according to claim 3, characterized in that: The three planetary wheels (47) are evenly distributed around the central wheel (45) in the circumferential direction.

5. The surgical curved forceps according to claim 1, characterized in that: The traction assembly (6) comprises a first connecting rod (61), a flexible connecting member (62), a second connecting rod (63), a universal joint (64) and a third connecting rod (65) which are connected in sequence; the first connecting rod (61), the flexible connecting member (62) and the second connecting rod (63) are rotatably connected in sequence; the second connecting rod (63), the universal joint (64) and the third connecting rod (65) are fixedly connected in sequence; one end of the first connecting rod (61) is connected to the connecting rod assembly (21); one end of the third connecting rod (65) is rotatably connected to a mounting portion (31) of the mounting angle adjustment mechanism (4) and extends out of the mounting portion to be connected to the angle adjustment mechanism; The first connecting rod (61) and the second connecting rod (63) are respectively located in the straight pipe section (11) of the bending clamp pipe body (1); the flexible connecting member (62) is located in the bending pipe section (12) of the bending clamp pipe body (1), and the two ends of the flexible connecting member (62) respectively extend to the two straight pipe sections of the bending clamp pipe body (1).

6. A surgical curved forceps according to claim 5, characterized in that: The curved pipe section (12) of the bending clamp pipe body (1) is located between the two straight pipe sections (11); the center lines of the two straight pipe sections (11) are respectively tangent to the center lines of the curved pipe sections (12).

7. A surgical curved forceps according to claim 5, characterized in that: The flexible connector (62) comprises a plurality of connecting blocks (621); the two ends of the connecting blocks are respectively marked as a first end and a second end; the first end is U-shaped and comprises two ear plates (622), each of which is provided with a mounting hole (623); and a first rotating shaft (624) is respectively mounted on both sides of the second end; Between two adjacent connection blocks (621), the two first rotating shafts (624) of one connection block (621) are respectively rotatably connected to the two mounting holes (623) of the other connection block (621).

8. A surgical curved forceps according to claim 7, characterized in that: The two mounting holes (623) of the connecting block (621) are coaxially arranged, and the two first rotating shafts (624) of the connecting block (621) are coaxially arranged; when observing from one side of the first end of the connecting block (621) to one side of the second end, the axis of the first rotating shaft (624) intersects with the axis of the mounting hole (623), and the angle between the axes is 120°.

9. The surgical curved forceps according to claim 1, characterized in that: The handle assembly comprises two handles (33); one end of the handle (33) is a mounting portion (31), and the other end of the handle (33) is a handle portion (32); a connecting portion (34) is provided between the mounting portion (31) and the handle portion (32) of the handle (33); the two connecting portions (34) of the two handles (33) are rotatably connected, and an elastic steel sheet (5) for resetting the handle portion (32) is installed between the two handle portions (32).

10. The surgical curved forceps according to claim 1, characterized in that: The connecting rod assembly (21) comprises a connecting rod 1 (211), a connecting rod 2 (212), a connecting rod 3 (213) and a connecting rod 4 (214); one end of the connecting rod 1 (211) and the connecting rod 2 (212) are respectively rotatably connected to the traction assembly (6); and the other ends of the connecting rod 1 (211) and the connecting rod 2 (212) are respectively rotatably connected to the connecting rod 3 (213) and the connecting rod 4 (214); The connecting rod three (213) and the connecting rod four (214) are connected in an X-shaped rotational manner via a second rotating shaft (215), and the two ends of the second rotating shaft (215) are respectively connected to the connecting member (24); one end of the connecting rod three (213) away from the connecting rod one (211) is connected to the upper clamp head (22), and one end of the connecting rod four (214) away from the connecting rod two (212) is connected to the lower clamp head (23).

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