Tumor clamping device for oral and maxillofacial surgery

Abstract

The invention discloses a tumor clamping device for oral and maxillofacial surgery, and relates to the technical field of medical instruments, the tumor clamping device comprises a clamping forceps main body, a forceps handle and a forceps head, the clamping forceps main body further comprises a forceps body, one end of the forceps body is connected with the forceps head, the other end of the forceps body is connected with the forceps handle, and a cavity is formed in the forceps body; the triggering mechanism at least comprises a supporting rod and two strip-shaped plates, the supporting rod is arranged in the cavity and can move in the axial direction of the clamp body, and one end of the clamp body is rotationally connected with a rotating disc; during operation, the pull rod is pulled outwards to drive the supporting rod to move horizontally, when the supporting rod is pulled to be away from the rotary disc, the supporting rod pushes the strip-shaped plate to swing, then the inner ends of the forceps heads are jacked open towards the two sides of the supporting rod, at the moment, the forceps heads at the outer ends are closed to clamp tissue, and the supporting rod, the strip-shaped plate and the rotary disc can be synchronously driven by rotating the pull rod after clamping; the whole angle of the forceps head is adjusted, clamping and overturning are completed while the clamping function is kept, large-amplitude movement of the wrist is avoided, and operation stability and flexibility are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, in particular to a tumor clamping device for oral and maxillofacial surgery. Background Art

[0002] Oral and maxillofacial tumors refer to benign and malignant tumors occurring in the oral and maxillofacial area, including cysts, benign tumors and tumor-like lesions, malignant tumors, etc.; surgical treatment is one of the main treatment methods for oral and maxillofacial tumors. During tumor resection surgery, a clamping device is needed to clamp the tumor to facilitate surgical operations, such as exposing the root of the tumor to facilitate scissors or a small knife to cut in for resection, or fixing the position of the tumor to facilitate the doctor to accurately remove the tumor and avoid damaging the surrounding normal tissues.

[0003] Oral and maxillofacial surgery often requires the coordinated operation of multiple instruments. After the clamping device clamps the tumor, the surgeon needs to rotate his wrist to adjust the clamping position or angle to make room for other instruments, such as the scalpel, electrosurgical unit, and aspirator, or to ensure smoother coordination between the instruments. For example, when using a scalpel to cut along the edge of a tumor, the surgeon needs to adjust the clamping device to position the tumor at the appropriate angle and position to facilitate precise cutting.

[0004] The doctor needs to hold the knife with his right hand and the clamping tool with his left hand to clamp the tumor that needs to be removed. Although the range of motion and flexibility of the human wrist are relatively large, maintaining a specific posture after rotation for a long time can easily lead to muscle fatigue. Moreover, when the wrist rotates, the stability of the hand will be affected, specifically the hand will shake, which will cause an unstable grip on the clamping tool and affect the accurate cutting of the scalpel. Summary of the Invention

[0005] The object of the present invention is to provide a tumor clamping device for oral and maxillofacial surgery to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides a tumor clamping device for oral and maxillofacial surgery, comprising a clamping forceps body, a clamp handle and a clamp head, wherein the clamping forceps body further comprises:

[0007] The pliers body has one end connected to the pliers head and the other end connected to the pliers handle, and a chamber is provided in the pliers body;

[0008] The trigger mechanism comprises at least a support rod disposed in the chamber and movable along the axial direction of the pliers body, and two strip plates. One end of the pliers body is rotatably connected to a turntable. One end of the two pliers heads extends through the turntable into the chamber and is hinged to one end of the strip plate via a torsion spring. The other end of the strip plate is rotatably connected to the support rod, so that when the support rod moves, the strip plate is pulled to swing and push the two pliers heads apart or close together.

[0009] The pull rod is arranged in the chamber and coincides with the axis of the clamp body. One end of the pull rod is connected to the support rod, and the other end passes through the clamp body and extends between the two clamp handles.

[0010] Furthermore, the trigger mechanism also includes,

[0011] The two pliers have an accommodating groove on one side opposite to the other. A second fixing rod is connected to the accommodating groove. One end of the strip plate is sleeved on the second fixing rod and connected to the second fixing rod through a torsion spring.

[0012] The two strip plates are respectively located at the top and bottom of the support rod, and the top and bottom of the support rod are rotatably connected to the strip plates through the first fixing rod.

[0013] Furthermore, one end of the clamp body is provided with a through opening, the outer ring wall of the rotary disc is provided with an embedded groove, the rotary disc is inserted into the through opening, and the outer wall of the embedded groove abuts against the inner wall of the through opening;

[0014] The turntable is provided with two through openings, which are staggered longitudinally. One end of the pliers head extends into the cavity of the pliers body through the through opening. The inner walls on both sides of the through opening are connected to rubber sleeves, and the side of the rubber sleeve away from the through opening abuts against the outer wall of the pliers head.

[0015] An insertion rod is also provided in the through opening, the top end of the insertion rod is connected to the inner top wall of the through opening, the bottom end of the insertion rod is connected to the inner bottom wall of the through opening, and the clamp head is rotatably connected to the outer wall of the insertion rod.

[0016] Furthermore, one end of each of the two pliers handles is hinged to one end of the pliers body;

[0017] The clamping pliers body is also provided with a transmission mechanism, which includes at least a connecting rod arranged in the chamber, the connecting rod and the clamp body are coaxially arranged, one end of the connecting rod is connected to the turntable, and the other end is rotatably connected to the inner wall of the chamber, and push rods are provided on both sides of the connecting rod, one end of the push rod passes through the clamp body and abuts against the clamp handle;

[0018] The connecting rod is connected to the chamber with a matching gear transmission part, and the outer wall of the push rod is connected with a thread groove that matches the thread of the gear transmission part. The two thread grooves have opposite thread directions. When the pliers handle rotates and pushes the push rod to move into the chamber, the thread groove drives the gear transmission part to drive the connecting rod to rotate, and the connecting rod drives the turntable and the pliers head to rotate together;

[0019] One end of the connecting rod is provided with a slide groove, the top and the bottom of the slide groove are penetrated, and the support rod is slidably arranged inside the slide groove.

[0020] Furthermore, the gear transmission element further includes:

[0021] Two first gear rings are located on the left and right sides of the connecting rod respectively, and the axial direction of the first gear rings coincides with the axial direction of the push rod;

[0022] The second gear ring is fixedly sleeved on the outer wall of the connecting rod, and a toothed belt is connected between the second gear ring and the two first gear rings;

[0023] The inner wall of the chamber is rotatably connected to two support members, and one end of the support member away from the chamber is connected to the outer wall of the first gear ring.

[0024] Furthermore, the clamp body is provided with two through slots, which are arranged in parallel and are located on the left and right sides of the connecting rod respectively;

[0025] A rotating rod is provided in the through slot, one end of the rotating rod is connected to the inner bottom wall of the through slot, and the other end is connected to the inner top wall of the through slot. A hinge shaft is installed at one end of the pliers handle, and the hinge shaft extends into the through slot and is rotatably connected to the outer wall of the rotating rod;

[0026] One end of the pliers handle is also provided with a slope, one end of the slope is connected to the right end of the hinge shaft, the right end of the hinge shaft is arranged parallel and abuts against the outer wall of the pliers body;

[0027] One end of the push rod extending outside the pliers body abuts against the slope.

[0028] Furthermore, the transmission mechanism further comprises a ratchet wheel disposed inside the first gear ring, wherein the axial direction of the ratchet wheel coincides with the axial direction of the first gear ring;

[0029] An annular groove is formed on the circumference of the first gear ring, and the orthographic projection area of the ratchet along the axial direction of the first gear ring at least covers the ring opening area of the annular groove;

[0030] It also includes two pawls, both of which are arranged in the annular groove, and one end of the pawl is rotatably connected to the inner wall of the annular groove through a rotating shaft;

[0031] The ratchet teeth on the ratchet wheel are provided with an inclined surface and a vertical surface, the outer wall of the pawl is against the inclined surface, the thread groove is connected with the ratchet wheel thread, and the ratchet teeth on the two ratchet wheels face opposite directions.

[0032] Furthermore, one end of the pliers body is provided with two inner cavities and sockets located at the front and rear ends of the inner cavities, the inner cavities are connected to the sockets, and the diameter of the inner cavities is larger than the diameter of the sockets, one of the sockets corresponds to the slope, and the other socket is connected to the chamber, and the push rod passes through the socket and abuts against the inner cavity and the slope;

[0033] A spring is also provided in the inner cavity. The spring is sleeved on the outer periphery of the push rod. One end of the spring is connected to the outer wall of the push rod, and the other end is against the inner wall of the inner cavity.

[0034] The supporting member is provided with a through hollow groove along the axial direction, and the thread groove is located in the hollow groove and has a gap with the insertion hole.

[0035] Furthermore, one end of the pull rod is inserted through the connecting rod and abuts against the outer wall of the turntable, the support rod is installed on the outer wall of the pull rod, and a pull rope is provided between the two clamp handles. One end of the pull rope is connected to the end of the pull rod located outside the clamp body, which is used to drive the pull rod and the support rod to move together when the pull rope is pulled.

[0036] Furthermore, one end of the pull rope away from the pull rod crosses to form a cross portion, and one end of the pull rope away from the cross portion is reconnected to the pull rod to form a ring-shaped closed pull rope;

[0037] A strip-shaped embedding groove is provided on one side corresponding to the two clamp handles, and a part of the pull rope is embedded in the strip-shaped embedding groove.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. In the present invention, during operation, the pull rod is pulled outward to drive the support rod to move horizontally. When the support rod is pulled away from the turntable, the support rod pushes the strip plate to swing, and then pushes the inner end of the clamp head toward both sides of the support rod. At this time, the outer end clamp head closes to clamp the tissue. After clamping, rotating the pull rod can synchronously drive the support rod, strip plate and turntable to achieve overall angle adjustment of the clamp head, and complete the clamping flip while maintaining the clamping function, avoiding large wrist movements and ensuring operational stability and flexibility.

[0040] 2. In the present invention, when the fingers are tightened inward, the right side of the pliers handle tilts along the slope, pushing the corresponding push rod to make the pliers head turn right; when expanding outward, only the left side of the pliers handle can tilt along the slope, pushing the push rod on the other side to make the pliers head turn left. One side of the hinge axis of the pliers handle is a parallel limit surface, and the reverse swing is blocked by the pliers body, ensuring that only one side of the push rod is subjected to force in each operation. By alternately pinching or expanding the pliers handle, the linear movement of the left and right push rods can be triggered respectively, thereby controlling the pliers head to achieve bidirectional rotation adjustment.

[0041] 3. In the present invention, when the push rod advances along the thread groove, the ratchet rotates, and the vertical surface of the ratchet pushes the pawl to drive the gear ring to rotate; when pulling back, the inclined surface of the ratchet slides over the pawl, and the gear ring remains stationary. The ratchet teeth of the left and right ratchets move in opposite directions, ensuring that only one side of the push rod is effectively transmitted when it reciprocates, and the push rod on the other side rotates idly. The gear rings are linked by a synchronous belt, so that when the push rods on both sides push alternately, the pliers head always rotates continuously in the same direction, thereby increasing the rotation angle of the pliers head. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0043] Figure 2 It is a front view of the present invention;

[0044] Figure 3 Schematic diagram of the connection structure between the pliers body and the pliers handle in the present invention;

[0045] Figure 4 Schematic diagram of the connection structure between the hinge shaft and the through slot in the present invention;

[0046] Figure 5 Schematic diagram of the connection structure between the pliers body and the pliers head in the present invention;

[0047] Figure 6 Schematic diagram of the internal structure of the clamp body in the present invention;

[0048] Figure 7 Schematic diagram of the connection structure between the second gear ring and the toothed belt in the present invention;

[0049] Figure 8 Schematic diagram of the connection structure between the push rod and the ratchet in the present invention;

[0050] Figure 9 Schematic diagram of the connection structure between the first gear ring and the toothed belt in the present invention;

[0051] Figure 10 Schematic diagram of the connection structure between the first gear ring and the ratchet wheel in the present invention;

[0052] Figure 11 is a cross-sectional view of the first gear ring in the present invention;

[0053] Figure 12 Schematic diagram of the connection structure between the ratchet and the pawl in the present invention;

[0054] Figure 13 Schematic diagram of the connection structure between the connecting rod and the pull rod in the present invention;

[0055] Figure 14 is a cross-sectional view of the strip plate of the present invention;

[0056] Figure 15 is a cross-sectional view of the turntable of the present invention;

[0057] Figure 16 It is a schematic diagram of the connection structure between the through opening and the rubber sleeve in the present invention.

[0058] In the figure: 1. Clamping pliers body; 101. Clamp body; 102. Clamp handle; 1021. Slope; 1022. Articulated shaft; 1023. Rotating rod; 1024. Through slot; 103. Clamp head; 1031. Pull rod; 1032. Pull rope; 1033. Strip-shaped embedded groove; 1034. Crossing portion;

[0059] 2. Transmission mechanism; 201. Connecting rod; 202. Push rod; 203. First gear ring; 204. Second gear ring; 205. Toothed belt; 206. Support member; 207. Threaded groove; 208. Ratchet; 2081. Inclined surface; 2082. Vertical surface; 209. Annular groove; 210. Ratchet pawl; 211. Rotating shaft;

[0060] 3. Trigger mechanism; 301. Turntable; 302. Support rod; 303. Strip plate; 304. Accommodation slot; 305. Slide slot; 306. First fixing rod; 307. Second fixing rod;

[0061] 4. Through opening; 5. Through port; 6. Inner cavity; 7. Socket; 8. Spring; 9. Embedded groove; 10. Insert rod; 11. Rubber sleeve. DETAILED DESCRIPTION

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0063] The present invention provides a technical solution:

[0064] See Figures 1-16 As shown, the tumor clamping device for oral and maxillofacial surgery includes a clamping forceps body 1, a clamp handle 102 and a clamp head 103. The clamping forceps body 1 also includes:

[0065] The clamp body 101 is connected to the clamp head 103 at one end and the clamp handle 102 at the other end. A chamber is formed in the clamp body 101;

[0066] The trigger mechanism 3 includes at least a support rod 302 disposed in the chamber and movable axially along the pliers body 101, and two strip plates 303. One end of the pliers body 101 is rotatably connected to the turntable 301. One end of the two pliers heads 103 extends through the turntable 301 into the chamber and is hinged to one end of the strip plate 303 via a torsion spring. The other end of the strip plate 303 is rotatably connected to the support rod 302, so that when the support rod 302 moves, the strip plate 303 is pulled to swing and push the two pliers heads 103 apart or close together.

[0067] The pull rod 1031 is disposed in the chamber and coincides with the axis of the pliers body 101 . One end of the pull rod 1031 is connected to the support rod 302 , and the other end passes through the pliers body 101 and extends between the two pliers handles 102 .

[0068] First in Figure 1 From the perspective of the clamp, it can be seen that the clamp body 1 consists of a clamp body 101, two clamp handles 102 and two clamp heads 103. When in use, first insert the index finger and ring finger into the finger rings on the two clamp handles 102 respectively, one end of the pull rod 1031 is located between the two clamp handles 102, and the rest of the pull rod 1031 is inserted into the cavity inside the clamp body 101, and then Figure 5 and Figure 6From the perspective of the turntable 301, one end of the pliers body 101 is connected to the turntable 301, one end of the turntable 301 is located in the chamber, and one end of the two pliers heads 103 extends into the chamber through the turntable 301. Figure 5 As can be seen in the figure, the area of the pliers 103 outside the pliers body 101 is wider than the area extending into the cavity. The two pliers 103 are staggered up and down at one end of the cavity, and the support rod 302 is located in the middle between the two pliers 103.

[0069] When the support rod 302 is close to the turntable 301, the ends of the two pliers 103 located in the chamber are close to each other, so the ends of the two pliers 103 located outside the pliers body 101 are open and away from each other. Figure 1 After the two forceps heads 103 are covered on the outside of the oral tumor, pinch the pull rod 1031 with the thumb and middle finger and pull it away from the forceps body 101, and then return to Figure 6 , after the pull rod 1031 is subjected to tension, it pulls the support rod 302 to move to the left. The initial position of the support rod 302 is close to the turntable 301. When it is pulled, the support rod 302 will move away from the turntable 301. When the support rod 302 moves, it will drive the right end of the strip plate 303 to move to the left;

[0070] Because the position where the left end of the strip plate 303 is connected to the clamp head 103 is close to the leftmost end of the clamp head 103, when the support rod 302 is close to the turntable 301, the strip plate 303 is as shown in FIG. Figure 6 As shown in the figure, it is close to a horizontal state from left to right. Therefore, when the support rod 302 drives the right end of the strip plate 303 to move to the left, the strip plate 303 will gradually form a horizontal state from front to back. At the same time, the end of the strip plate 303 connected to the support rod 302 will rotate, and the connection point between the strip plate 303 and the clamp head 103 will also rotate, so that the strip plate 303 can move horizontally from front to back. Figure 6 From the perspective of the support rod 302, the support rod 302 can only move left and right, and cannot move forward and backward. Therefore, when the strip plate 303 gradually changes to a horizontal state from front to back, the end of the clamp head 103 located in the chamber will be pushed toward the left and right sides of the support rod 302, that is, the ends of the two clamp heads 103 located in the chamber will move away from each other.

[0071] After the ends of the two pliers heads 103 located in the chamber move away from each other, the ends of the two pliers heads 103 located outside the pliers body 101 move closer to each other, thereby clamping the tumor. Then, when it is necessary to turn the angle of the pliers heads 103 to clamp the tumor, the thumb and middle finger are still used to rotate the pull rod 1031. When the pull rod 1031 rotates, it drives the support rod 302 to rotate together. Then, when the support rod 302 rotates, it drives the strip plate 303, the pliers heads 103 and the turntable 301 to rotate.

[0072] The two clamp heads 103 can be rotated without the wrist having to rotate significantly or maintain a fixed posture, and at the same time, the clamping function of the two clamp heads 103 is not affected.

[0073] See Figure 6-Figure 14 , the trigger mechanism 3 also includes,

[0074] The two pliers heads 103 are each provided with a receiving groove 304 on the opposite side thereof. A second fixing rod 307 is fixedly connected to the receiving groove 304. One end of the strip plate 303 is sleeved on the second fixing rod 307 and connected to the second fixing rod 307 via a torsion spring. The top end of the second fixing rod 307 is fixedly connected to the inner top wall of the receiving groove 304, and the bottom end of the second fixing rod 307 is fixedly connected to the inner bottom wall of the receiving groove 304.

[0075] The two strip plates 303 are respectively located at the top and bottom of the support rod 302 . The top and bottom of the support rod 302 are rotatably connected to the strip plates 303 via the first fixing rod 306 .

[0076] by Figure 14 From the perspective of the support rod 302, the top and bottom are both rotatably connected to the first fixing rod 306, and one end of the upper and lower strip plates 303 is respectively fixedly connected to the outer wall of one of the first fixing rods 306. Therefore, when one end of the strip plate 303 rotates around the support rod 302, it rotates along the support rod 302 through one end of the first fixing rod 306.

[0077] The other end of the strip plate 303 is sleeved on the second fixing rod 307. The torsion spring is located on the outer wall of the second fixing rod 307. One end of the torsion spring is fixedly connected to the outer wall of the second fixing rod 307, and the other end of the torsion spring is fixedly connected to the inner wall of the strip plate 303. Therefore, after the right end of the strip plate 303 moves to the left, the tension applied to the pull rod 1031 is released, and the torsion spring will push the strip plate 303 back to its original position, so that the right end of the strip plate 303 rotates back to a position close to the turntable 301, and the support rod 302 will also move rightward back to a position close to the turntable 301.

[0078] Still Figure 14 From the perspective of FIG, when the right end of the strip plate 303 is close to the turntable 301, the portion of the strip plate 303 close to the second fixing rod 307 will enter the receiving groove 304, and the receiving groove 304 provides space for the swing of the strip plate 303.

[0079] See Figure 6-Figure 16 One end of the clamp body 101 is also provided with a through opening 5, and the outer ring wall of the turntable 301 is provided with an embedded groove 9, the turntable 301 is inserted into the through opening 5, and the outer wall of the embedded groove 9 is against the inner wall of the through opening 5;

[0080] The turntable 301 is provided with two through-openings 4, which are staggered longitudinally. One end of the pliers head 103 extends through the through-opening 4 into the cavity of the pliers body 101. The inner walls of both sides of the through-opening 4 are fixedly connected to rubber sleeves 11. The side of the rubber sleeve 11 away from the through-opening 4 abuts against the outer wall of the pliers head 103.

[0081] An insertion rod 10 is also provided in the through opening 4. The top end of the insertion rod 10 is fixedly connected to the inner top wall of the through opening 4, the bottom end of the insertion rod 10 is fixedly connected to the inner bottom wall of the through opening 4, and the clamp head 103 is rotatably connected to the outer wall of the insertion rod 10.

[0082] When the turntable 301 rotates, the embedded groove 9 rotates along the inner wall of the through hole 5. Figure 14 and Figure 15 As can be seen in the figure, the outer ring of the turntable 301 is provided with an inner groove 9 that is concave inwardly. This makes the diameter of the edges at both ends of the turntable 301 larger than the diameter of the inner groove 9. Therefore, when the turntable 301 is stuck in the through-hole 5, the outer wall of the inner groove 9 contacts the inner wall of the through-hole 5, while the edges at both ends of the turntable 301 are outside the through-hole 5, so as to prevent the turntable 301 from easily falling out of the through-hole 5.

[0083] exist Figure 15 As can be seen in the figure, the two pliers heads 103 are respectively protruding at the upper and lower parts, and pass through the turntable 301. Therefore, the two pliers heads 103 have a height difference inside the cavity. Such a height difference can prevent the two ends of the pliers heads 103 from pressing against each other when they are close together, thereby improving the opening angle of the pliers heads 103 outside the pliers body 101. The outer parts are of the same height and have no height difference. Therefore, the outer parts are responsible for clamping oral and maxillofacial tumors. The protruding parts of the pliers heads 103 pass through the through opening 4 and enter the cavity. When the pliers heads 103 swing, the pliers heads 103 will rotate along the outer wall of the insertion rod 10.

[0084] The top of the area where the pliers head 103 is located inside the through opening 4 is in contact with the inner top wall of the through opening 4, and the bottom is also in contact with the inner bottom wall of the through opening 4. However, there is a gap between the area where the pliers head 103 is located inside the through opening 4 and the inner walls on the left and right sides of the through opening 4. This horizontal gap is space for the pliers head 103 to swing. The rubber sleeve 11 is located between the inner wall of the through opening 4 and the pliers head 103, so that the pliers head 103 will squeeze the rubber sleeve 11 when swinging. The rubber sleeve 11 is made of softer rubber, which can not only block the gap between the pliers head 103 and the two side walls of the through opening 4, but also does not affect the swing of the pliers head 103.

[0085] See Figures 1-13 , one end of the two pliers handles 102 is hinged to one end of the pliers body 101;

[0086] The clamping pliers body 1 is also provided with a transmission mechanism 2, which includes at least a connecting rod 201 disposed in the chamber. The connecting rod 201 is coaxially arranged with the clamp body 101. One end of the connecting rod 201 is fixedly connected to the turntable 301, and the other end is rotatably connected to the inner wall of the chamber. Push rods 202 are provided on both sides of the connecting rod 201. One end of the push rod 202 passes through the clamp body 101 and abuts against the clamp handle 102.

[0087] The connecting rod 201 is connected to a gear transmission member that matches the chamber. A thread groove 207 that matches the thread of the gear transmission member is fixedly connected to the outer wall of the push rod 202. The two thread grooves 207 have opposite thread directions. When the pliers handle 102 rotates and pushes the push rod 202 to move into the chamber, the thread groove 207 drives the gear transmission member to drive the connecting rod 201 to rotate. The connecting rod 201 drives the turntable 301 and the pliers head 103 to rotate together.

[0088] A sliding groove 305 is formed at one end of the connecting rod 201 . The top and bottom of the sliding groove 305 are penetrated, and the support rod 302 is slidably disposed inside the sliding groove 305 .

[0089] Please pay attention Figure 5 and Figure 6 , tilt the pliers handle 102 to one side, the side wall of the pliers handle 102 will come into conflict with the end of the push rod 202 located outside the pliers body 101, and then the continuous squeezing of the pliers handle 102 will cause the push rod 202 to move into the chamber. When the push rod 202 moves together with the thread groove 207, the thread groove 207 passes through the gear assembly on one side of the connecting rod 201. The gear assembly cannot move and can only rotate. Therefore, the thread groove 207 cooperates with the thread of the gear assembly. When the thread groove 207 moves, the gear assembly will rotate and drive the connecting rod 201 to rotate together. After the connecting rod 201 rotates, one end will rotate along the chamber, and the other end will drive the turntable 301 to rotate together, thereby realizing the flipping of the pliers head 103;

[0090] At the same time Figure 6 From the perspective of , it can be seen that the support rod 302 is located in the slide groove 305, and the side wall of the support rod 302 contacts the inner wall of the slide groove 305, so that the support rod 302 will slide along the slide groove 305 when moving, thereby improving the stability of the movement of the support rod 302;

[0091] by Figure 7 From the perspective of FIG, the two thread grooves 207 have opposite spiral directions. Therefore, when the push rod 202 on the left is moved, the gear assembly and the connecting rod 201 will rotate to the left, and when the push rod 202 on the right is moved, the gear assembly and the connecting rod 201 will rotate to the right.

[0092] See Figure 6-Figure 9 , the gear transmission also includes,

[0093] Two first gear rings 203 are respectively located on the left and right sides of the connecting rod 201, and the axial direction of the first gear rings 203 coincides with the axial direction of the push rod 202;

[0094] The second gear ring 204 is fixedly sleeved on the outer wall of the connecting rod 201, and a toothed belt 205 is connected between the second gear ring 204 and the two first gear rings 203;

[0095] The inner wall of the chamber is rotatably connected to two support members 206 , and one end of the support member 206 away from the chamber is fixedly connected to the outer wall of the first gear ring 203 .

[0096] The second gear ring 204 is fixedly mounted on the outer wall of the connecting rod 201, and the support member 206 is rotatably connected to the inner wall of the clamp body 101 and supports the first gear ring 203 so that the two first gear rings 203 and the second gear ring 204 are on the same horizontal line at the same height. Figure 7 It can be seen that the second gear ring 204 is longer than the two first gear rings 203. The two first gear rings 203 are staggered front to back. A toothed belt 205 is connected between the two first gear rings 203 and the second gear ring 204. The first gear ring 203 and the second gear ring 204 are both meshed and connected with the toothed belt 205. The first gear ring 203 and the second gear ring 204 are connected to each other through the toothed belt 205.

[0097] by Figure 7 From the perspective of , when the push rod 202 on the left moves into the chamber, the first gear ring 203 on the left will rotate to the left, and drive the second gear ring 204 to rotate to the left together through the toothed belt 205. At the same time, the first gear ring 203 and the toothed belt 205 on the right will also rotate to the left, and when the push rod 202 on the right moves into the chamber, the first gear ring 203 on the right will rotate to the right. This is because the spiral directions of the two thread grooves 207 are different, so that the user can adjust the direction of rotation of the pliers head 103 so that the pliers head 103 can rotate in both left and right directions.

[0098] See Figure 3-Figure 6 The clamp body 101 is further provided with two through slots 1024 , which are arranged in parallel and are respectively located on the left and right sides of the connecting rod 201 ;

[0099] A rotating rod 1023 is provided in the through slot 1024. One end of the rotating rod 1023 is fixedly connected to the inner bottom wall of the through slot 1024, and the other end is fixedly connected to the inner top wall of the through slot 1024. A hinge shaft 1022 is fixedly mounted on one end of the pliers handle 102. The hinge shaft 1022 extends into the through slot 1024 and is rotatably connected to the outer wall of the rotating rod 1023.

[0100] One end of the pliers handle 102 is further provided with a slope 1021 , one end of which is connected to the right end of the hinge shaft 1022 , which is arranged parallel to and abuts against the outer wall of the pliers body 101 ;

[0101] One end of the push rod 202 extending to the outside of the pliers body 101 abuts against the slope 1021 .

[0102] exist Figure 3 As can be seen, the slopes 1021 on the two clamp handles 102 face the same direction. Figure 4 For example, when the handle 102 is swung, it tilts toward the slope 1021, and the slope 1021 approaches the push rod 202, thereby pushing the push rod 202 into the chamber. When the handle 102 is swung, the hinge shaft 1022 rotates within the through slot 1024 along the outer wall of the rotating rod 1023. The side of the hinge shaft 1022 away from the slope 1021 is parallel to the outer wall of the clamp body 101, so that the handle 102 cannot tilt toward the parallel surface.

[0103] Back to Figure 3 From the perspective of the user, the slopes 1021 on the two pliers handles 102 are oriented in the same direction, so the two pliers handles 102 can only tilt in the same direction. In this way, when the index finger and the ring finger hook the two pliers handles 102 and tighten the fingers inward at the same time, the right one will tilt to the left, that is, the position between the two pliers handles 102, while the left one will not tilt. At this time, the slope 1021 on the right push rod 202 on the right, thereby rotating the pliers head 103 to the right.

[0104] On the contrary, the index finger and the ring finger are away from each other, and the force applied is outward. The slope 1021 of the right pliers handle 102 faces left, so the right pliers handle 102 cannot tilt outward. The slope 1021 on the left pliers handle 102 faces left, so the left pliers handle 102 can tilt left, thereby squeezing the left push rod 202, causing the pliers head 103 to rotate leftward.

[0105] Therefore, in simple terms, the effect achieved is that pinching the two pliers handles 102 inward or expanding them outward with the fingers will only cause one of the pliers handles 102 to tilt, and then the pliers head 103 can be rotated left or right alternately.

[0106] See Figure 6-Figure 12 The transmission mechanism 2 further includes a ratchet 208 disposed inside the first gear ring 203 , wherein the axial direction of the ratchet 208 coincides with the axial direction of the first gear ring 203 ;

[0107] An annular groove 209 is formed on the circumference of the first gear ring 203, and the orthographic projection area of the ratchet 208 along the axial direction of the first gear ring 203 at least covers the ring opening area of the annular groove 209;

[0108] It also includes two pawls 210, both of which are disposed in the annular groove 209, and one end of the pawl 210 is rotatably connected to the inner wall of the annular groove 209 via a rotating shaft 211;

[0109] The ratchet teeth on the ratchet wheel 208 are provided with an inclined surface 2081 and a vertical surface 2082 . The outer wall of the pawl 210 abuts against the inclined surface 2081 . The thread groove 207 is threadedly connected to the ratchet wheel 208 . The ratchet teeth on the two ratchet wheels 208 face opposite directions.

[0110] The outer wall of the ratchet 208 abuts against the inner wall of the annular groove 209. Figure 10 The figure in FIG. 2 is the outer shape of the first gear ring 203, and Figure 11 This is a cross-sectional view of the first gear ring 203. An annular groove 209 is formed on the inner ring wall of the first gear ring 203. The ratchet 208 is directly threadedly connected to the thread groove 207. Since the position of the first gear ring 203 is fixed and the diameter of the ratchet 208 is larger than the diameter of the outlet of the annular groove 209, the annular groove 209 acts as a barrier to the ratchet 208. As a result, when the push rod 202 and the thread groove 207 pass through the ratchet 208, the ratchet 208 will not move but only rotate;

[0111] Next, Figure 10 and Figure 11 From the perspective in, it can be seen that the ratchet teeth on the two ratchet wheels 208 face opposite directions, so that when the right push rod 202 and the threaded groove 207 pass through the right ratchet wheel 208 and move toward the pliers head 103, the right ratchet wheel 208 will rotate to the right, and the vertical surface 2082 of the ratchet teeth on the right ratchet wheel 208 faces to the right. Therefore, after the right ratchet wheel 208 rotates to the right, the vertical surface 2082 will abut against the pawl 210, and then the right first toothed ring 203 is driven to rotate to the right through the pawl 210. Conversely, when the left push rod 202 and the threaded groove 207 pass through the left ratchet wheel 208 and move toward the pliers head 103, the left first toothed ring 203 will also rotate to the left;

[0112] Since as long as one of the first gear rings 203 rotates, the second gear ring 204 and the other first gear ring 203 will also rotate. For example, when the first gear ring 203 on the right rotates to the right, the first gear ring 203 on the left will also rotate to the right. However, the vertical surface 2082 of the left ratchet is facing left. Therefore, when the first gear ring 203 on the left rotates to the right, it will push the left ratchet 208 to rotate through the pawl 210. At this time, the left push rod 202 and the left push rod 204 are in contact. The pliers handle 102 is in conflict and cannot move, so the ratchet 208 causes the left push rod 202 to rotate in place through the threaded groove 207. Because when the left push rod 202 moves toward the pliers head 103, the left ratchet 208 rotates to the left. Therefore, when the left ratchet 208 rotates to the right, the left push rod 202 should move toward the pliers handle 102. However, the left push rod 202 is in conflict with the pliers handle 102 and cannot move toward the pliers handle 102. Therefore, the left push rod 202 rotates in place.

[0113] Returning to the right ratchet 208, it is known that when the right push rod 202 and the threaded groove 207 move toward the pliers head 103, the right ratchet 208 will rotate to the right, and then push the pawl 210 and the first toothed ring 203 to rotate to the right through the vertical surface 2082. Then, when the push rod 202 is pulled back toward the pliers handle 102, the right ratchet 208 will rotate to the left. However, when the ratchet 208 rotates to the left, the inclined surface 2081 of the ratchet teeth will pass over the bottom surface of the pawl 210 and will not push the pawl 210, thereby not pushing the first toothed ring 203 to move to the left. In this way, the right push rod 202 and the threaded groove 207 can be repeatedly moved and pulled back. The user continuously pushes and pulls out the push rod 202, which can make the right first toothed ring 203 continue to rotate to the right, thereby increasing the rotatable angle of the pliers head 103.

[0114] On the other hand, when the left ratchet 208 comes to the left, the left push rod 202 and the threaded groove 207 move toward the pliers head 103, the left ratchet 208 will rotate to the left, and then push the pawl 210 through the vertical surface 2082 on the ratchet teeth, and then the left first gear ring 203 will rotate to the left together, and then drive the second gear ring 204 and the connecting rod 201 to rotate together through the toothed belt 205. At this time, the right first gear ring 203 will also rotate to the left, and the right push rod 202 will also rotate in place. Because when the right push rod 202 moves toward the direction of the pliers handle 102, the right ratchet 208 will rotate to the left, and the right push rod 202 will conflict with the pliers handle 102 at this time. Therefore, when the right first gear ring 203 and ratchet 208 rotate to the left, the right push rod 202 will rotate in place;

[0115] When the left push rod 202 and the threaded groove 207 are pulled back toward the pliers handle 102, the left ratchet wheel 208 rotates to the right. The inclined surface 2081 of the ratchet teeth on the left ratchet wheel 208 also slides across the bottom surface of the left pawl 210. Therefore, the left first toothed ring 203 will not be driven to rotate to the right. Consequently, the second toothed ring 204 will not be rotated to the right when the left push rod 202 and the threaded groove 207 are pulled back toward the pliers handle 102. Therefore, the second toothed ring 204 will not be rotated to the left when the right push rod 202 and the threaded groove 207 are pulled back toward the pliers handle 102.

[0116] The pitch angle of the thread groove 207 is greater than 15 degrees, so the spiral inclination of the thread groove 207 is relatively steep. In this way, when the thread groove 207 moves and passes through the ratchet 208, the normal pressure of the thread teeth of the thread groove 207 on the threaded hole of the ratchet 208 will produce a significant tangential component force, forcing the ratchet 208 to rotate around the axis. Because if the pitch of the thread groove 207 is too small, the friction between the thread groove 207 and the inner thread of the threaded hole will offset the axial thrust, resulting in the thread groove 207 and the push rod 202 being unable to move axially.

[0117] See Figure 8 One end of the clamp body 101 is provided with two inner cavities 6 and sockets 7 located at the front and rear ends of the inner cavity 6. The inner cavity 6 is connected to the sockets 7, and the diameter of the inner cavity 6 is larger than the diameter of the sockets 7. One of the sockets 7 corresponds to the slope 1021, and the other socket 7 is connected to the chamber. The push rod 202 passes through the socket 7 and abuts against the inner cavity 6 and the slope 1021.

[0118] A spring 8 is also provided in the inner cavity 6. The spring 8 is sleeved around the outer periphery of the push rod 202. One end of the spring 8 is fixedly connected to the outer wall of the push rod 202, and the other end abuts against the inner wall of the inner cavity 6.

[0119] The support member 206 is provided with a through hollow groove along the axial direction. The thread groove 207 is located in the hollow groove and has a gap with the insertion hole 7 .

[0120] exist Figure 8 As can be seen in the figure, there is a gap between the thread groove 207 and the socket 7, so that the thread groove 207 will not pass through the socket 7 when the push rod 202 moves. The push rod 202 will only move within the distance between the thread groove 207 and the socket 7. The push rod 202 passes through the socket 7 and the inner cavity 6 is horizontal between the inside and outside of the pliers body 101. The diameter of the spring 8 is larger than the socket 7, and the spring 8 will not move out through the socket 7. The left end of the spring 8 is fixedly connected to the outer wall of the push rod 202. When the push rod 202 moves toward the first gear ring 203, the left end of the spring 8 moves toward the right end, and the right end of the spring 8 conflicts with the inner wall of the inner cavity 6, so the spring 8 is squeezed and contracts.

[0121] After the clamp handle 102 releases the pressure on the push rod 202, the spring 8 will rebound and pull the push rod 202 back to its original position, thereby achieving automatic reset of the push rod 202. It is worth noting that the end of the spring 8 that is not connected to the push rod 202 is not connected to the inner cavity 6, so it does not affect the rotation of the push rod 202;

[0122] Figure 8 The support member 206 in the figure is a cross-section. It can be seen that the interior of the support member 206 is hollow. When the push rod 202 and the threaded groove 207 move, they also move within the hollow groove of the support member 206 without contacting the support member 206. Since the support member 206 is used to support the first gear ring 203, when the first gear ring 203 rotates, the end of the support member 206 connected to the pliers body 101 also rotates along the inner wall of the pliers body 101.

[0123] The unidirectional movement distance of the push rod 202 is limited. When the push rod 202 moves toward the first gear ring 203, the left end of the push rod 202 will not completely enter the socket 7. A section of the end of the push rod 202 located outside the clamp body 101 will still be exposed outside the socket 7.

[0124] See Figures 1-13 One end of the pull rod 1031 is inserted into the connecting rod 201 and is against the outer wall of the turntable 301. The support rod 302 is fixedly installed on the outer wall of the pull rod 1031. A pull rope 1032 is provided between the two clamp handles 102. One end of the pull rope 1032 is fixedly connected to the end of the pull rod 1031 located outside the clamp body 101, and is used to drive the pull rod 1031 and the support rod 302 to move together when the pull rope 1032 is pulled.

[0125] The index finger and the ring finger are used to hook the two pliers handles 102, and the middle finger can pull the pull rope 1032 away from the pliers head 103. When the pull rope 1032 is pulled, it will pull the pull rod 1031, and then the support rod 302 will be pulled to move through the pull rod 1031. After the tension on the pull rope 1032 is released, the pull rod 1031 and the support rod 302 will also bounce back to their original position through the torsion spring.

[0126] See Figure 1-Figure 2 The end of the pull rope 1032 away from the pull rod 1031 crosses to form a cross portion 1034, and the end of the pull rope 1032 away from the cross portion 1034 is fixedly connected to the pull rod 1031 again to form a ring-shaped closed pull rope 1032;

[0127] A strip-shaped embedding groove 1033 is formed on one side of the two clamp handles 102 , and a portion of the pull rope 1032 is embedded in the strip-shaped embedding groove 1033 .

[0128] exist Figure 2As can be seen in the figure, the pull rope 1032 is wrapped around to form a loop, and parts of the areas on both sides of the pull rope 1032 are respectively in the two strip-shaped embedded grooves 1033, so as to prevent the pull rope 1032 from hanging down due to gravity and keep the pull rope 1032 in the position between the two clamp handles 102. The middle finger passes through the loop of the intersection 1034 and hooks the intersection of the pull rope 1032 and the intersection 1034, and then exerts force to pull the pull rope 1032. When the pull rope 1032 is pulled, parts of the areas on both sides of the pull rope 1032 will also come out of the strip-shaped embedded grooves 1033;

[0129] The diameter of the strip groove 1033 is smaller than the diameter of the pull rope 1032, so the pull rope 1032 will not fall out easily after being inserted into the strip groove 1033. The pull rope 1032 is divided into two loops by the cross portion 1034. The fingers are inserted into the two loops and hook the cross portion 1034. The two loops formed by the cross form double contact points on the fingers, which can reduce the pulling force on the local area of the fingers, reduce the discomfort of being strangled, and enhance stability.

Claims

1. A tumor clamping device for oral and maxillofacial surgery, comprising a clamping forceps body (1), a clamp handle (102) and a clamp head (103), characterized in that: The clamping forceps body (1) further comprises: A clamp body (101) is connected to the clamp head (103) at one end and to the clamp handle (102) at the other end, and a chamber is provided in the clamp body (101); The trigger mechanism (3) comprises at least a support rod (302) arranged in the chamber and movable along the axial direction of the clamp body (101) and two strip plates (303); one end of the clamp body (101) is rotatably connected to the turntable (301); one end of the two clamp heads (103) passes through the turntable (301) and extends into the chamber and is hinged to one end of the strip plate (303) via a torsion spring; the other end of the strip plate (303) is rotatably connected to the support rod (302) and is used for pulling the strip plate (303) to swing when the support rod (302) moves, thereby pushing the two clamp heads (103) apart or pulling them together; The pull rod (1031) is arranged in the chamber and coincides with the axis of the clamp body (101). One end of the pull rod (1031) is connected to the support rod (302), and the other end passes through the clamp body (101) and extends between the two clamp handles (102).

2. The tumor clamping device for oral and maxillofacial surgery according to claim 1, wherein: The trigger mechanism (3) further comprises, The two pliers heads (103) are provided with a receiving groove (304) on opposite sides thereof, a second fixing rod (307) is connected in the receiving groove (304), one end of the strip plate (303) is sleeved on the second fixing rod (307) and is connected to the second fixing rod (307) via a torsion spring; The two strip plates (303) are respectively located at the top and bottom of the support rod (302), and the top and bottom of the support rod (302) are rotatably connected to the strip plates (303) through the first fixing rod (306).

3. The tumor clamping device for oral and maxillofacial surgery according to any one of claims 1 to 2, characterized in that: One end of the clamp body (101) is further provided with a through opening (5), the outer ring wall of the rotary disc (301) is provided with an embedded groove (9), the rotary disc (301) is inserted into the through opening (5), and the outer wall of the embedded groove (9) abuts against the inner wall of the through opening (5); The turntable (301) is provided with two through openings (4) extending longitudinally, and one end of the clamp head (103) extends into the chamber of the clamp body (101) through the through opening (4). The inner walls on both sides of the through opening (4) are connected to rubber sleeves (11), and the side of the rubber sleeve (11) away from the through opening (4) abuts against the outer wall of the clamp head (103); An insertion rod (10) is also provided in the through opening (4), the top end of the insertion rod (10) is connected to the inner top wall of the through opening (4), the bottom end of the insertion rod (10) is connected to the inner bottom wall of the through opening (4), and the clamp head (103) is rotatably connected to the outer wall of the insertion rod (10).

4. The tumor clamping device for oral and maxillofacial surgery according to claim 3, wherein: One end of each of the two pliers handles (102) is hinged to one end of the pliers body (101); The clamping pliers body (1) is further provided with a transmission mechanism (2), which comprises at least a connecting rod (201) arranged in the chamber, wherein the connecting rod (201) is coaxially arranged with the clamp body (101), one end of the connecting rod (201) is connected to the turntable (301), and the other end is rotatably connected to the inner wall of the chamber, and push rods (202) are provided on both the left and right sides of the connecting rod (201), and one end of the push rod (202) passes through the clamp body (101) and abuts against the clamp handle (102); The connecting rod (201) is connected to a gear transmission member that matches the chamber, and a thread groove (207) that matches the thread of the gear transmission member is connected to the outer wall of the push rod (202). The two thread grooves (207) have opposite thread directions. When the clamp handle (102) rotates and pushes the push rod (202) to move into the chamber, the thread groove (207) drives the gear transmission member to drive the connecting rod (201) to rotate, and the connecting rod (201) drives the turntable (301) and the clamp head (103) to rotate together; One end of the connecting rod (201) is provided with a slide groove (305), the top and bottom of the slide groove (305) are penetrated, and the support rod (302) is slidably arranged inside the slide groove (305).

5. The tumor clamping device for oral and maxillofacial surgery according to claim 4, characterized in that: The gear transmission also includes: Two first gear rings (203) are respectively located on the left and right sides of the connecting rod (201), and the axial direction of the first gear rings (203) coincides with the axial direction of the push rod (202); The second gear ring (204) is fixedly sleeved on the outer wall of the connecting rod (201), and a toothed belt (205) is connected between the second gear ring (204) and the two first gear rings (203); The inner wall of the chamber is rotatably connected to two support members (206), and one end of the support member (206) away from the chamber is connected to the outer wall of the first gear ring (203).

6. The tumor clamping device for oral and maxillofacial surgery according to claim 5, characterized in that: The clamp body (101) is further provided with two through slots (1024), which are arranged in parallel and are respectively located on the left and right sides of the connecting rod (201); A rotating rod (1023) is provided in the through slot (1024), one end of the rotating rod (1023) is connected to the inner bottom wall of the through slot (1024), and the other end is connected to the inner top wall of the through slot (1024); a hinge shaft (1022) is installed at one end of the clamp handle (102), and the hinge shaft (1022) extends into the through slot (1024) and is rotatably connected to the outer wall of the rotating rod (1023); One end of the pliers handle (102) is further provided with a slope (1021), one end of the slope (1021) is connected to the right end of the hinge shaft (1022), and the right end of the hinge shaft (1022) is arranged in parallel and abuts against the outer wall of the pliers body (101); One end of the push rod (202) extending to the outside of the clamp body (101) abuts against the slope (1021).

7. The tumor clamping device for oral and maxillofacial surgery according to claim 6, wherein: The transmission mechanism (2) further includes a ratchet (208) disposed inside the first gear ring (203), wherein the axial direction of the ratchet (208) coincides with the axial direction of the first gear ring (203); An annular groove (209) is provided on the circumference of the first gear ring (203); the orthographic projection area of the ratchet (208) along the axial direction of the first gear ring (203) at least covers the ring opening area of the annular groove (209); It also includes two ratchet pawls (210), both of which are arranged in the annular groove (209), and one end of the ratchet pawl (210) is rotatably connected to the inner wall of the annular groove (209) through a rotating shaft (211); The ratchet teeth on the ratchet wheel (208) are provided with an inclined surface (2081) and a vertical surface (2082), the outer wall of the pawl (210) abuts against the inclined surface (2081), the thread groove (207) is threadedly connected to the ratchet wheel (208), and the ratchet teeth on the two ratchet wheels (208) face opposite directions.

8. The tumor clamping device for oral and maxillofacial surgery according to claim 7, characterized in that: One end of the clamp body (101) is provided with two inner cavities (6) and jacks (7) located at the front and rear ends of the inner cavity (6), the inner cavity (6) is connected to the jacks (7), and the diameter of the inner cavity (6) is larger than the diameter of the jacks (7), one of the jacks (7) corresponds to the slope (1021), and the other jack (7) is connected to the chamber, and the push rod (202) passes through the jack (7) and abuts against the inner cavity (6) and the slope (1021); A spring (8) is also provided in the inner cavity (6), and the spring (8) is sleeved on the outer periphery of the push rod (202), one end of the spring (8) is connected to the outer wall of the push rod (202), and the other end is against the inner wall of the inner cavity (6); The support member (206) is provided with a through hollow groove along the axial direction, and the thread groove (207) is located in the hollow groove and has a gap with the insertion hole (7).

9. The tumor clamping device for oral and maxillofacial surgery according to claim 8, characterized in that: One end of the pull rod (1031) is inserted through the connecting rod (201) and abuts against the outer wall of the turntable (301), and the support rod (302) is installed on the outer wall of the pull rod (1031). A pull rope (1032) is provided between the two clamp handles (102), and one end of the pull rope (1032) is connected to the end of the pull rod (1031) located outside the clamp body (101), and is used to drive the pull rod (1031) and the support rod (302) to move together when the pull rope (1032) is pulled.

10. The tumor clamping device for oral and maxillofacial surgery according to claim 9, characterized in that: One end of the pull rope (1032) away from the pull rod (1031) crosses to form a cross portion (1034), and one end of the pull rope (1032) away from the cross portion (1034) is reconnected to the pull rod (1031) to form a ring-shaped closed pull rope (1032); A strip-shaped embedding groove (1033) is provided on one side corresponding to the two clamp handles (102), and a portion of the pull rope (1032) is embedded in the strip-shaped embedding groove (1033).

Images