A distraction-compression device

Abstract

The present application relates to the field of medical devices, and relates to a distraction and compression device, which comprises a positioning forceps, a distraction and compressor and a holder; the positioning forceps comprises a forceps body, a screw adjusting assembly and a forceps head, the screw adjusting assembly is arranged at the rear end of the forceps body and is used for adjusting the opening and closing of the forceps body, and the forceps head is rotationally arranged at the front end of the forceps body; the distraction and compressor comprises an adjusting assembly, the adjusting assembly comprises a bottom rod, a sliding seat and a rotation limiting ring, the sliding seat is slidingly arranged on the bottom rod and at least two groups of the sliding seat are arranged on each group of the bottom rod, and the rotation limiting ring is rotationally arranged on the sliding seat; the holder passes through the rotation limiting ring in the distraction and compressor, the holder is rotationally controlled through the forceps head, the screw position can be flexibly positioned in the operation, and the distraction and compression operation is implemented, and the device has reliable practical value and is beneficial to the rapid, smooth and safe operation.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and specifically to a spreading and pressurizing device. Background Technology

[0002] Clinically, spinal-related diseases include degenerative disc disease, vertebral slippage, vertebral fracture, scoliosis, and spinal deformities. Intraoperatively, decompression, reduction, and internal fixation of the lesion are usually required. In percutaneous minimally invasive surgery, due to the small incision, the common approach is to insert an implant and use a manipulator. During the procedure, the relevant vertebral body is then displaced and compressed to facilitate vertebral repositioning. This is a common step in spinal surgery. However, existing compression devices have limited functionality, resulting in unstable and uncontrollable effects, slippage, and limited parallel and adjacent displacement at a single angle. Especially when the manipulator and compression device are not on the same horizontal plane, the compression device cannot change angle, and the clamping position is limited, only allowing line or point contact with the manipulator. This leads to unsatisfactory clinical outcomes when facing complex and varied indications. Summary of the Invention

[0003] To address the problems of the prior art, the present invention provides a spreading and pressurizing device.

[0004] The objective of this invention can be achieved through the following technical solution: A spreading and pressurizing device includes: a positioning clamp, a spreading and pressurizing device, and a gripper;

[0005] The positioning clamp includes a clamp body, a screw adjustment assembly, and a clamp head. The screw adjustment assembly is located at the rear end of the clamp body and is used to adjust the opening and closing of the clamp body. The clamp head is rotatably located at the front end of the clamp body.

[0006] The expansion pressurizer includes an adjustment assembly, which includes a base rod, a sliding seat, and a rotation limiting ring. The sliding seat is slidably disposed on the base rod, and at least two sets are provided on each set of base rods. The rotation limiting ring is rotatably disposed on the sliding seat.

[0007] The gripper passes through the rotation limit ring in the pressure device, and the gripper is controlled to rotate by the clamp head.

[0008] In a further improvement, a rotating component is rotatably connected to the rear end of the pliers head. The rotating component includes a main rotating block and a connecting part disposed at the front end of the main rotating block. A connecting block is provided at the rear end of the pliers head between the connecting parts. The connecting block and the connecting part are rotatably connected by a fastening bolt. The main rotating block is provided with an annular groove perpendicular to the connecting part. The front end of the pliers body is provided with a circular hole for the main rotating block to rotate. A fastening bolt is threadedly connected to the top surface of the pliers body. The lower end of the fastening bolt passes through the circular hole into the annular groove. A limit post is threadedly connected to the side of the pliers body. The lower end of the limit post passes through the circular hole into the annular groove. The pliers head is provided with a clamping groove.

[0009] In a further improvement, the clamp body includes two sets of interlocking and rotatably connected clamp handles. The screw adjustment assembly includes a screw, an inner nut, and an outer nut. The end of the screw is rotatably fixed to one side of the clamp handle, and the other side of the screw passes through the clamp handle on the other side. The inner nut is threaded onto the screw and located between the clamp handles, and the outer nut is threaded onto the screw and located outside the clamp handle on the other side.

[0010] Further improvements include: a toothed groove on the upper end face of the base rod; insert blocks at intervals on the lower end face of the base rod; a slide rail through which the base rod passes on the sliding seat; a circular groove at the bottom of the middle side of the slide rail; an upper channel concentric with the circular groove and connected to the slide rail on the top of the sliding seat; a spring inside the circular groove; a button inside the upper channel; a limiting guide rod in the track groove on the side of the button; the end of the limiting guide rod being located inside the sliding seat; a second slide rail through which the base rod passes inside the button; insert blocks matching and engaging with insert blocks on the bottom end face inside the second slide rail; a rack and pinion block rotatably mounted on one side of the base rod; the lower end of the rack and pinion block engaging with the toothed groove; and a paddle at the outer end of the rack and pinion block.

[0011] In a further improvement, the adjustment assembly is provided with two sets. The rotation limit ring includes an upper limit ring and a lower half ring. The upper limit ring is rotatably disposed at the front end of the upper sliding seat. The upper limit ring has an annular groove II inside. The upper sliding seat is threadedly connected to a fastening bolt III. The lower end of the fastening bolt III is located in the annular groove II. The lower half ring is rotatably disposed at the front end of the lower sliding seat. The lower half ring has an annular groove III inside. The lower sliding seat is threadedly connected to a fastening bolt IV. The lower end of the fastening bolt IV is located in the annular groove III.

[0012] In a further improvement, the lower button is located at the rear end of the sliding seat, the upper button is located at the upper end of the sliding seat, the annular groove of the lower sliding seat is perpendicular to the slide rail, and the insert of the lower bottom rod is located on the front end face of the bottom rod.

[0013] In a further improvement, the gripper is provided with a slot, and a spreading bar is provided between the two sets of grippers. The spreading bar includes a triangular plate and a support rod provided at the tail end of the triangular plate. The side end of the triangular plate is provided with a groove that matches the slot.

[0014] In a further improvement, the tail end of the bottom rod is provided with a square socket, and the end face of the bottom rod is provided with an elastic hook, the front end of which is located inside the square socket.

[0015] In a further improvement, three sets of glass ball screws are arranged at an annular interval inside the upper limit ring.

[0016] Compared with the prior art, the advantages of the pressure-expanding device of the present invention are as follows:

[0017] This invention provides a distraction and compression device that offers a convenient solution not only for conventional open surgery but also for minimally invasive surgery. It allows for flexible positioning of screws during surgery and enables distraction and compression operations. This device has reliable practical value and facilitates faster, smoother, and safer surgical procedures. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of multiple grippers applying pressure in this invention.

[0021] Figure 4 This is a schematic diagram of the structure of multiple sets of grippers spread out in this invention.

[0022] Figure 5 This is a schematic diagram of the positioning clamp in the present invention.

[0023] Figure 6 for Figure 5 Schematic diagram of the enlarged part

[0024] Figure 7 This is a schematic diagram of the partially expanded pressure device in this invention.

[0025] Figure 8 This is a schematic diagram of the internal structure of the sliding seat in this invention.

[0026] Figure 9 This is a schematic diagram of the structure of the bottom rod end in this invention.

[0027] Figure 10 This is a schematic diagram of the positioning clamp and the supporting bar plate in this invention.

[0028] Figure 11 This is a schematic diagram of the upper limit ring in this invention.

[0029] Figure 12 This is a schematic diagram of the structure for replacing the central gripper rotation limit ring during the opening of multiple gripper sets in this invention.

[0030] Figure 13 This is a schematic diagram of the structure of the adjusting component in the present invention, in the first state of the expanding bar plate.

[0031] Figure 14 This is a schematic diagram of the structure of the adjusting component in cooperation with the extended bar plate in the second state of the present invention.

[0032] Figure 15 for Figure 10 Schematic diagram of another state

[0033] In the diagram, 1-positioning clamp, 11-clamp body, 111-clamp handle, 112-round hole, 12-screw adjustment assembly, 121-screw, 122-inner nut, 123-outer nut, 13-clamp head, 131-connecting block, 132-clamping groove, 14-rotating component, 141-main rotating block, 142-connecting part, 143-annular groove one, 15-fastening bolt one, 16-fastening bolt two, 17-limiting post, 2-spreading pressure device, 21-adjusting assembly, 22-base rod, 221-tooth groove, 222-insertion block one, 223-square socket, 224-elastic clip Hook, 23-Sliding seat, 231-Slide rail one, 232-Circular groove, 233-Upper channel, 234-Spring, 235-Fastening bolt three, 236-Fastening bolt four, 24-Rotation limit ring, 241-Upper limit ring, 242-Lower half ring, 243-Circular groove two, 244-Ball screw, 25-Button, 251-Slide rail two, 252-Insertion block two, 253-Race track groove, 254-Limiting guide rod, 26-Rack and pinion block, 261-Pulley, 3-Holder, 31-Slot, 4-Spreading bar, 41-Triangle plate, 42-Support rod, 43-Groove. Detailed Implementation

[0034] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] The following describes the embodiments and appendices. Figures 1-15 The technical solution of the present invention will be further described below.

[0037] Example 1

[0038] A spreading and pressurizing device includes: a positioning clamp 1, a spreading and pressurizing device 2, and a gripper 3; the positioning clamp 1 includes a clamp body 11, a screw adjustment assembly 12, and a clamp head 13, the screw adjustment assembly 12 is disposed at the rear end of the clamp body 11 and is used to adjust the opening and closing of the clamp body 11, and the clamp head 13 is rotatably disposed at the front end of the clamp body 11.

[0039] The expansion and pressurizing device 2 includes an adjustment assembly 21, which includes a base rod 22, a sliding seat 23, and a rotation limiting ring 24. The sliding seat 23 is slidably disposed on the base rod 22, and at least two sets are provided on each set of base rods 22. The rotation limiting ring 24 is rotatably disposed on the sliding seat 23. The gripper 3 passes through the rotation limiting ring 24, and the gripper 3 is controlled to rotate by the clamp head 13.

[0040] like Figures 1-7 As shown in the figure, the operating principle of this invention is as follows: The 360° rotatable jaw head 13 at the front end of the positioning clamp 1 contacts the gripper at multiple angles, increasing the contact area. After the angle is determined, the jaw head 13 is locked. The clamp head 13 is opened and pressed through the screw adjustment assembly 12, thereby pressing and opening the gripper 3 at the lower end. At this time, the rotation of the two sets of grippers will also drive the rotation limit ring 24 sleeved on its outside to rotate, thereby controlling the screw on the cone at the lower end of the gripper. By directly opening and pressing the multi-angle positioning clamp, the opening and closing degree of the lower end gripper is more easily controlled, the lever arm is extended, and the effort required for operation is improved. The distance between the two sets of grippers is further adjusted by adjusting the position of the sliding seat 23 on the upper and lower sets of bottom rods 22, and the angle of the gripper is further adjusted with high precision, thereby controlling the screw on the cone more accurately.

[0041] like Figure 3 and Figure 4 As shown, when three sets of sliding seats 23 are set on a single base rod 22, three sets of grippers 3 are used. The positioning clamp 1 controls the two sets of grippers 3 located on the outside to open or press. The grippers on both sides can adjust the angle through the positioning clamp and these two sets of grippers can move the sliding seats 23. The gripper in the middle is opened or pressed by moving the sliding seats 23, so as to realize the opening or pressing of the vertebral body across segments and multiple segments, meet the complexity of the working conditions, and improve the operation effect when facing complex and varied indications.

[0042] The purpose of this invention is to provide a distraction and compression device that offers a convenient solution not only for conventional open surgery but also for minimally invasive surgery. It allows for flexible positioning of screws during surgery and enables distraction and compression operations. This device has reliable practical value and facilitates faster, smoother, and safer surgical procedures.

[0043] As a further preferred embodiment, the rear end of the clamp head 13 is rotatably connected to a rotating component 14. The rotating component 14 includes a main rotating block 141 and a connecting portion 142 disposed at the front end of the main rotating block 141. The rear end of the clamp head 13 is provided with a connecting block 131 located between the connecting portions 142. The connecting block 131 and the connecting portion 142 are rotatably connected by a fixing bolt 15. The main rotating block 141 is provided with an annular groove 143 perpendicular to the connecting portion 142. The front end of the clamp body 11 is provided with a circular hole 112 for the main rotating block 141 to rotate. The top surface of the clamp body 11 is threadedly connected with a fixing bolt 16. The lower end of the fixing bolt 16 passes through the circular hole 112 into the annular groove 143. The side of the clamp body 11 is threadedly connected with a limiting post 17. The lower end of the limiting post 17 passes through the circular hole 112 into the annular groove 143. The clamp head 13 is provided with a clamping groove 132.

[0044] like Figure 5 and Figure 6 As shown, by rotating the clamp head 13, the rotating part 14 rotates 360° circumferentially along the axis of the circular hole 112. After adjusting to a suitable position, the second fastening bolt 16 is rotated to press the annular groove 143, thereby fixing the position and allowing the gripper to make multi-angle contact areas. In addition, the connecting block 131 of the clamp head 13 can rotate relative to the connecting part 142 of the rotating part 14, with the rotation direction perpendicular to the circumferential direction of the axis of the circular hole 112, further increasing the activity angle of the clamp head 13. It is then fixed by the fastening bolt 15, thereby increasing the rotation angle range of the lower gripper and making the clamping position adjustment more flexible.

[0045] Adjust the position of the rotating part 14 so that the opening of the jaw 13 faces inward. At this time, the jaw 13 is located on the outer side of the upper end of the gripper, making the lower section of the gripper 3 larger and open. Adjust the position of the rotating part 14 so that the opening of the jaw 13 faces outward. At this time, the jaw 13 is located on the inner side of the upper end of the gripper, making the lower section of the gripper 3 smaller and pressurized, thus satisfying the flexibility of the open or pressurized working state.

[0046] As a further preferred embodiment, the clamp body 11 includes two sets of interleaved and rotatably connected clamp handles 111, and the screw adjustment assembly 12 includes a screw 121, an inner nut 122 and an outer nut 123. The end of the screw 121 is rotatably fixed to one side of the clamp handle 111, and the other side of the screw 121 passes through the clamp handle 111 on the other side. The inner nut 122 is threadedly connected to the screw 121 and located between the clamp handles 111, and the outer nut 123 is threadedly connected to the screw 121 and located outside the clamp handle 111 on the other side.

[0047] like Figure 5 and Figure 6As shown, when it is necessary to control the lower end of the pliers 111 to open, the inner nut 122 and the outer nut 123 are rotated outwards simultaneously; when it is necessary to control the lower end of the pliers 111 to apply pressure, the inner nut 122 and the outer nut 123 are rotated inwards simultaneously, making the adjustment simple and efficient.

[0048] As a further preferred embodiment, the upper end face of the base rod 22 is provided with a toothed groove 221, and the lower end face of the base rod 22 is provided with insert blocks 222 spaced apart. The sliding seat 23 is provided with a slide rail 231 through which the base rod 22 passes. The bottom of the slide rail 231 is provided with an annular groove 232. The top of the sliding seat 23 is provided with an upper channel 233 concentric with the annular groove 232 and communicating with the slide rail 231. A spring 234 is provided in the annular groove 232, and a button 25 is provided in the upper channel 233. A limiting guide rod 254 is provided in the raceway groove 253 on the side of the button 25. The end of the limiting guide rod 254 is located in the sliding seat 23. The button 25 has a second slide 251 through which the bottom rod 22 passes. The bottom surface of the second slide 251 has a second insert 252 that matches and engages with the first insert 222. A rack and pinion block 26 is rotatably provided on one side of the bottom rod 22. The lower middle part of the rack and pinion block 26 is engaged with the tooth groove 221. A paddle 261 is provided at the outer end of the rack and pinion block 26.

[0049] like Figure 7 As shown in Figure 8, pressing down on button 25 disengages insert block 252 from insert block 222. Rotating the lever 261 causes the rack lever 26 to rotate, which in turn causes the entire sliding seat 23 to slide on the toothed groove 221 of the base rod 22. After adjusting to the designated position, button 25 is pushed upward by the spring 234, causing insert block 252 to engage with insert block 222, thus fixing the sliding seat 23. Adjusting the distance between the upper and lower sets of sliding seats facilitates the adjustment of the gripper 3 set on the rotation limit ring 24, and the angle between the two sets of grippers can be adjusted to open or press the lower end of the gripper. The gear and rack drive enables high precision movement of the sliding seat, thereby allowing for high-precision adjustment of the gripper position. At the same time, the elastic button facilitates the fixing and unlocking of the sliding seat.

[0050] As a further preferred embodiment, the adjustment assembly 21 is provided with two sets. The rotation limit ring 24 includes an upper limit ring 241 and a lower half ring 242. The upper limit ring 241 is rotatably disposed at the front end of the upper sliding seat 23. The upper limit ring 241 has an annular groove 243 inside. The upper sliding seat 23 is threadedly connected to a fastening bolt 235. The lower end of the fastening bolt 235 is located in the annular groove 243. The lower half ring 242 is rotatably disposed at the front end of the lower sliding seat 23. The lower half ring 242 has an annular groove 3 inside. The lower sliding seat 23 is threadedly connected to a fastening bolt 236. The lower end of the fastening bolt 236 is located in the annular groove 3.

[0051] like Figure 1 and Figure 7 As shown, the adjustment assembly 21 has two sets, upper and lower. The upper upper limit ring 241 is the inner ring. The gripper 3 passes through it and will not move arbitrarily, but can only rotate along the upper limit ring 241. The upper limit ring 241 rotates along the front end of the sliding seat 23 and is fixed by the fastening bolt 235 after rotating to the designated position. The lower half ring 242 rotates along the front end of the sliding seat 23 as the gripper 3 rotates. After the gripper 3 rotates to the designated position, it is fixed by the fastening bolt 236.

[0052] like Figure 1 and Figure 12 As shown, two sets of adjustment components 21 are used, one upper and one lower. The upper and lower sets adjust the position of the gripper 3 on the sliding seat 23 respectively. Compared with a single set of adjustment components 21, when the bottom position of the gripper 3 is not adjusted properly, the position and angle of the gripper 3 are adjusted by the sliding seat 23 in the lower adjustment component 21, so that the bottom position of the gripper 3 is adjusted to a precise position, and fine adjustment is made by the lower adjustment component 21.

[0053] The width of the lower half ring 242 is greater than that of the upper limit ring 241. During the entire expansion and pressurization process, the force on the lower half ring 242 is unidirectional. Therefore, when the unidirectional force is large and it is used for multi-segment expansion and pressurization, the lower half ring 242 of the middle of the three sets of grips is placed on the upper sliding seat, while the upper limit ring 241 is placed on the lower sliding seat. The lower half ring 242 can be replaced with the upper limit ring 241 to improve the adjustment stability of the three sets of grips.

[0054] As a further preferred embodiment, the lower button 25 is disposed at the rear end of the sliding seat 23, the upper button 25 is disposed at the upper end of the sliding seat 23, the annular groove 232 of the lower sliding seat 23 is perpendicular to the slide rail 231, and the insert block 222 of the lower bottom rod 22 is disposed on the front end face of the bottom rod 22. Figure 1 , Figure 2 and Figure 7 As shown, considering that if the upper sliding seat 23 is too close to the lower sliding seat 23, the button on the top of the lower sliding seat 23 cannot be adjusted by hand, the button 25 of the lower sliding seat 23 is set at the rear end to facilitate adjustment of the lower sliding seat 23.

[0055] As a further preferred embodiment, the gripper 3 is provided with a slot 31, and a spreading bar 4 is provided between the two sets of grippers 3. The spreading bar 4 includes a triangular plate 41 and a support rod 42 provided at the tail end of the triangular plate 41. The side end of the triangular plate 41 is provided with a groove 43 that matches the slot 31.

[0056] like Figure 10 , Figure 13 , Figure 14 and Figure 15 As shown, when the spacing at the lower end of the gripper 3 changes during the opening or pressing process, the opening bar 4 is moved so that the groove 43 on the corresponding side width of the opening bar 4 engages with the slot 31 on the gripper 3. The opening bar 4 provides internal support for the grippers 3 on both sides, preventing the spacing at the lower end of the gripper 3 from changing due to other factors, thus improving the stability of use. Depending on the usage requirements, the opening bar 4 can be used flexibly with the adjustment component 2 or with the positioning clamp 1. The opening bar 4 can be positioned with the adjustment component 21. When the adjustment component 21 is located at the upper end of the gripper 3, the triangular plate 41 of the opening bar 4 is located between the lower ends of the gripper 3, providing support for the gripper 3 during the opening process. When the adjustment component 21 is located in the middle of the gripper 3, the support rod 42 of the opening bar 4 is located between the upper ends of the gripper 3, preventing interference between the upper ends of the two sets of grippers 3.

[0057] As a further preferred embodiment, the tail end of the base rod 22 is provided with a square socket 223, and the end face of the base rod 22 is provided with an elastic hook 224, the front end of which is located inside the square socket 223. Figure 9 As shown, by splicing a new base rod 22 by inserting it into the square socket 223, the length of the rack is extended, which allows for the placement of multiple sets of sliding seats 3. Furthermore, it can increase the distance between the upper or lower ends of multiple grippers, enabling multi-segment or cross-segment expansion and pressurization at more locations of the vertebral body.

[0058] As a further preferred embodiment, the upper limit ring 241 is provided with three sets of glass ball screws 244 arranged at annular intervals, such as... Figure 11 As shown, the clamping stability of the holder 3 is improved by using the glass ball screw 244.

[0059] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A distraction-compression device, characterized in that include: Positioning clamps, spreading pressure devices, and grippers; The positioning clamp includes a clamp body, a screw adjustment assembly, and a clamp head. The screw adjustment assembly is located at the rear end of the clamp body and is used to adjust the opening and closing of the clamp body. The clamp head is rotatably located at the front end of the clamp body. The expansion pressurizer includes an adjustment assembly, which includes a base rod, a sliding seat, and a rotation limiting ring. The sliding seat is slidably disposed on the base rod, and at least two sets are provided on each set of base rods. The rotation limiting ring is rotatably disposed on the sliding seat. The gripper passes through the rotation limit ring in the pressure device, and the gripper is controlled to rotate by the clamp head; The rear end of the pliers head is rotatably connected to a rotating component, which includes a main rotating block and a connecting part disposed at the front end of the main rotating block. The rear end of the pliers head is provided with a connecting block located between the connecting parts. The connecting block and the connecting part are rotatably connected by a fastening bolt. The main rotating block is provided with an annular groove perpendicular to the connecting part. The front end of the pliers body is provided with a circular hole for the main rotating block to rotate. The top surface of the pliers body is threaded with a fastening bolt, the lower end of which passes through the circular hole into the annular groove. The side of the pliers body is threaded with a limiting post, the lower end of which passes through the circular hole into the annular groove. The pliers head is provided with a clamping groove. The upper end face of the base rod is provided with a toothed groove, and the lower end face of the base rod is provided with a first insert block at intervals. The sliding seat is provided with a first slide rail through which the base rod passes. The bottom of the first slide rail is provided with a circular groove. The top of the sliding seat is provided with an upper channel concentric with the circular groove and communicating with the first slide rail. A spring is provided in the circular groove. A button is provided in the upper channel. A limiting guide rod is provided in the track groove on the side of the button. The end of the limiting guide rod is provided in the sliding seat. The button is provided with a second slide rail through which the base rod passes. The bottom end face of the second slide rail is provided with a second insert block that matches and engages with the first insert block. A rack and pinion block is rotatably provided on one side of the base rod. The lower end of the rack and pinion block is engaged with the toothed groove. A paddle is provided on the outer end of the rack and pinion block.

2. The spreading and pressurizing device according to claim 1, characterized in that, The clamp body includes two sets of interlocking and rotatably connected clamp handles. The screw adjustment assembly includes a screw, an inner nut, and an outer nut. The end of the screw is rotatably fixed to one side of the clamp handle, and the other side of the screw passes through the clamp handle on the other side. The inner nut is threaded onto the screw and located between the clamp handles, and the outer nut is threaded onto the screw and located outside the clamp handle on the other side.

3. The spreading and pressurizing device according to claim 1, characterized in that, The adjustment assembly is provided in two sets. The rotation limit ring includes an upper limit ring and a lower half ring. The upper limit ring is rotatably disposed at the front end of the upper sliding seat. The upper limit ring has an annular groove 2 inside. The upper sliding seat is threadedly connected to a fastening bolt 3. The lower end of the fastening bolt 3 is located in the annular groove 2. The lower half ring is rotatably disposed at the front end of the lower sliding seat. The lower half ring has an annular groove 3 inside. The lower sliding seat is threadedly connected to a fastening bolt 4. The lower end of the fastening bolt 4 is located in the annular groove 3.

4. The spreading and pressurizing device according to claim 1, characterized in that, The lower button is located at the rear end of the sliding seat, the upper button is located at the upper end of the sliding seat, the annular groove of the lower sliding seat is perpendicular to the slide rail, and the insert of the lower bottom rod is located on the front end face of the bottom rod.

5. The spreading and pressurizing device according to claim 1, characterized in that... The gripper is provided with a slot, and a spreading bar is provided between the two sets of grippers. The spreading bar includes a triangular plate and a support rod provided at the tail end of the triangular plate. The side end of the triangular plate is provided with a groove that matches the slot.

6. The spreading and pressurizing device according to claim 1, characterized in that, The bottom rod has a square socket at its tail end and an elastic hook on its end face, with the front end of the elastic hook located inside the square socket.

7. The spreading and pressurizing device according to claim 3, characterized in that, The upper limit ring is provided with three sets of glass ball screws at an annular interval.

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