A vertebral distraction instrument and auxiliary instrument assembly for spinal correction surgery

Abstract

The present invention discloses a vertebral distraction instrument and an auxiliary instrument assembly for spinal correction surgery, wherein the auxiliary instrument assembly includes a vertebral distraction instrument and a temporary locking and positioning instrument. When performing spinal correction surgery, the vertebral distraction instrument can be used to temporarily distract adjacent vertebrae to a target position, and then the temporary locking and positioning instrument can be used to temporarily lock adjacent vertebrae to the target position, thereby facilitating support and correction operations on the patient's ribs and improving the success rate of the surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a vertebral distraction instrument and an auxiliary instrument assembly for spinal correction surgery. Background Art

[0002] The so-called intervertebral space refers to the space between two adjacent vertebrae, and this space is where the intervertebral disc is located. Severe scoliosis often has symptoms of spinal stenosis and is accompanied by problems with herniated intervertebral discs. Widening the space between vertebrae, restoring normal vertebral alignment, and relaxing ligament tension can reduce compression and stimulation of the spinal cord and spinal nerve roots.

[0003] When performing spinal correction on patients with moderate to severe scoliosis, pedicle screws are needed to fix each vertebra to achieve spinal vertebral stability. For patients with rib deformities, doctors need to support and correct the patient's ribs before tightening the pedicle screws to reconstruct a normal thorax. At this time, the pedicle screws implanted in the vertebrae that have not been tightened are prone to slip and dislocation on the spinal connecting rod, resulting in failure of spinal correction surgery.

[0004] In view of the above surgical objectives, spinal orthopedic surgeons need a surgical auxiliary instrument assembly that can first expand the adjacent vertebrae to an ideal position, and can also temporarily lock the expanded vertebrae on the spinal connecting rod, and can position the pedicle screws so that they cannot be displaced. After the doctor completes the support of the ribs and tightens the pedicle screws, the temporary locking and positioning instrument can be removed from the spinal connecting rod.

[0005] Therefore, how to facilitate rib support correction before tightening the pedicle screws is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a vertebral distraction instrument and auxiliary instrument assembly for spinal correction surgery. During spinal correction surgery, the vertebral distraction instrument can be used to temporarily distract adjacent vertebrae to a target position, thereby facilitating the support and correction of the patient's ribs.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A vertebral distraction instrument for spinal corrective surgery, comprising: a left distraction seat, a left distraction plate, a right distraction seat, a right distraction plate, and a pressurizing screw, wherein the outer circumference of the pressurizing screw is provided with an external thread and one end of the pressurizing screw is provided with a clamping block flange, the left distraction seat and the right distraction seat are arranged side by side, one end of the left distraction seat is provided with a step hole and the other end is hinged to the left distraction plate, the pressurizing screw is rotatably matched with the step hole through the clamping block flange, and the pressurizing screw is axially limited with the left distraction seat through the axial clamping action of the clamping block flange and the step hole, one end of the right distraction seat is threadedly matched with the pressurizing screw and the other end is hinged to the right distraction plate, the ends of the left distraction plate and the ends of the right distraction plate are both provided with clamping grooves for slidingly clamping a spinal connecting rod.

[0009] The method of using the vertebral distraction instrument is to first clamp the slots of the left distraction plate and the right distraction plate between two adjacent pedicle screws of the spinal connecting rod, and then rotate the pressure screw to move the right distraction plate away from the left distraction plate along the spinal connecting rod, so that the two adjacent vertebrae are distracted to the target position through the two distraction plates. At this time, the vertebral distraction instrument is fixed with the help of other external forces, so that the rib support and correction operation can be conveniently performed, thereby improving the success rate of the operation.

[0010] Preferably, the hinge axis between the left opening piece and the left opening seat and the hinge axis between the right opening piece and the right opening seat are both axial screws, and the axis of the axial screw is arranged parallel to the axis of the pressure screw.

[0011] Preferably, a knob is provided at the other end of the pressurizing screw opposite to the block flange.

[0012] Preferably, the axial thickness of the left expansion piece along its hinge axis is the left expansion piece thickness, and the thickness of the left expansion piece gradually decreases in the direction from its hinge axis to its slot; the axial thickness of the right expansion piece along its hinge axis is the right expansion piece thickness, and the thickness of the right expansion piece gradually decreases in the direction from its hinge axis to its slot.

[0013] Preferably, the card slot is a U-shaped card slot.

[0014] The present invention also provides an auxiliary instrument assembly for spinal orthopedic surgery, including a temporary locking and positioning instrument and the vertebral distraction instrument as described above, wherein the temporary locking and positioning instrument includes a main body, a compression screw plug and a pressure rod, the main body of the main body is a hollow cylindrical structure, the main body includes a screw plug connection part and a clamping part for clamping the spinal connecting rod, the screw plug connection part is provided with an internal thread for threading with the compression screw plug, the clamping part is connected to the bottom of the screw plug connection part, and the clamping part includes two clamping parts arranged opposite to each other, the upper end of each clamping part is integrally connected to the screw plug connection part and can be relative to the screw plug connection part The two clamping parts are elastically swung, and the facing sides of the two clamping parts are provided with a concave arc-shaped clamping surface. The upper end of the clamping part is provided with a pressure rod socket, and the two pressure rod sockets are connected with the hollow cavity of the main body to form a passage for the pressure rod to pass through, and the extension direction of the passage is arranged to intersect with the longitudinal dividing surface between the two clamping parts. The pressure rod passes through the passage and the two ends of the pressure rod are respectively located at the upper ends of the two clamping parts, and the lower end of the clamping screw plug is coaxially fixed with a center rod, and the upper side of the pressure rod is provided with a center rivet hole for rotatably cooperating with the center rod, and the aperture of the center rivet hole is smaller than the diameter of the clamping screw plug.

[0015] The method of using the auxiliary instrument assembly is as follows: first, the vertebral body distraction instrument is used to distract the patient's vertebral body to an ideal position, then the temporary locking and positioning instrument is clamped on the spinal connecting rod, and the main body is abutted against one side of the pedicle screw to be positioned, and then the compression screw is tightened, and the pressure rod is pressed down when the compression screw is tightened, and the two clamping parts are driven to approach each other by the compression of the pressure rod, so that the clamping part at the lower part of the main body is firmly clamped on the spinal connecting rod, that is, the vertebral body is temporarily locked in the target position, and at this time, the rib support and correction operation can be conveniently performed, thereby improving the success rate of the operation. After the operation is completed, the compression screw is loosened again, so that the clamping part releases the clamping of the spinal connecting rod, and the temporary locking and positioning instrument is removed.

[0016] Preferably, the upper surface and the lower surface of the pressing rod are both planes.

[0017] Preferably, the center rod and the clamping screw are an integrated structure.

[0018] Preferably, the central rivet hole passes through the upper and lower sides of the pressing rod.

[0019] Preferably, the outer peripheral surface of the main body is a cylindrical surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of a vertebral distraction device in a specific embodiment of the present invention;

[0022] Figure 2 is a longitudinal cross-sectional view of a vertebral distraction device in a specific embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a left support seat and a left support sheet in a specific embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of another viewing angle of the left support seat and the left support sheet in a specific embodiment of the present invention;

[0025] Figure 5 It is a structural schematic diagram of a right opening seat and a right opening piece in a specific embodiment of the present invention;

[0026] Figure 6 It is a schematic structural diagram of a pressurizing screw in a specific embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of the vertebral distraction device in a specific embodiment of the present invention in use;

[0028] Figure 8 It is a schematic diagram of the state in which the left and right distraction plates distract the pedicle screws in a specific embodiment of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of a temporary locking and positioning device in a specific embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram from another perspective of the temporary locking and positioning device in a specific embodiment of the present invention;

[0031] Fig.11 It is a structural front view of a main body member in a specific embodiment of the present invention;

[0032] Fig.12 It is a structural schematic diagram of a pressing rod in a specific embodiment of the present invention;

[0033] Fig.13 It is a structural schematic diagram of a compression screw plug in a specific embodiment of the present invention;

[0034] Fig.14is a longitudinal cross-sectional view of a main body member in a specific embodiment of the present invention;

[0035] Fig.15 It is a schematic diagram of the use status of the temporary locking and positioning device in a specific embodiment of the present invention.

[0036] Figures 1 to 15 The meanings of the reference numerals in the figure are as follows:

[0037] 1-right support plate, 2-left support plate, 3-axial screw, 4-left support seat, 5-thread plug, 6-pressure screw, 7-right support seat, 8-knob, 9-block flange, 10-slot, 11-threaded hole, 12-spinal connecting rod, 13-pedicle screw, 14-tensioning screw plug, 15-pressure rod, 16-screw plug connecting part, 17-clamping part, 18-main body, 19-arc clamping surface, 20-internal thread, 21-center rivet hole, 22-pressure rod socket, 23-longitudinal dividing surface, 24-screw plug groove, 25-center rod, 26-clamping piece, 27-axial platform. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0039] Please refer to Figures 1 to 8 In order to facilitate the correction of the patient's rib support, the present invention provides a vertebral distraction instrument for spinal correction surgery, including: a left distraction seat 4, a left distraction sheet 2, a right distraction seat 7, a right distraction sheet 1, and a pressurizing screw 6, wherein the outer circumference of the pressurizing screw 6 is provided with an external thread and one end of the pressurizing screw 6 is provided with a clamping block flange 9, the left distraction seat 4 and the right distraction seat 7 are arranged side by side, one end of the left distraction seat 4 is provided with a step hole and the other end is hinged with the left distraction sheet 2, and the pressurizing screw 6 is rotatably matched with the step hole through the clamping block flange 9, In addition, the pressure screw 6 realizes axial limitation with the left expansion seat 4 through the axial clamping action of the block flange 9 and the step hole. One end of the right expansion seat 7 is threadedly matched with the pressure screw 6 and the other end is hinged with the right expansion plate 1. The end of the left expansion plate 2 and the end of the right expansion plate 1 are both provided with a clamping groove 10 for slidingly clamping the spinal connecting rod 12. During the operation, the outer side walls of the clamping grooves 10 of the left expansion plate 2 and the right expansion plate 1 can be used to respectively abut against the U-shaped connectors of two adjacent pedicle screws 13 on the spinal connecting rod 12.

[0040] Specifically, a screw plug 5 can be installed in the step hole of the left support seat 4 to limit the block flange 9 of the pressure screw 6 from escaping from the step hole, that is, to achieve the axial limiting function of the block flange 9. Of course, the present solution can also install a sealing member such as an end cover or a block in the step hole of the left support seat 4 to achieve the axial limiting function of the block flange 9.

[0041] The far end of the left opening seat 4 (i.e., the end for hingedly connecting the left opening piece 2) is provided with an axial platform 27, which is a step surface arranged axially inclined relative to the left opening seat 4. The axial platform 27 will not hinder the range of motion of the left opening seat 4, and when the left opening piece 2 is moved along the Figure 3 When the inclined step surface of the axial platform 27 is rotated to the maximum angle in the counterclockwise direction, the left expansion seat 4 and the left expansion sheet 2 are folded and abutted against each other for easy storage. The distal end of the right expansion seat 7 is also provided with an axial platform 27, and its structure is similar to that of the left expansion seat 4, which will not be described in detail in this article. In addition, the proximal end of the right expansion seat 7 (i.e., one end for connecting the pressurizing screw 6) is provided with a threaded hole 11 that cooperates with the external thread of the pressurizing screw 6. The right expansion seat 7 is arranged corresponding to the left expansion seat 4, and the right expansion sheet 1 is arranged symmetrically with the left expansion sheet 2.

[0042] Preferably, the hinge axis between the left opening piece 2 and the left opening seat 4 and the hinge axis between the right opening piece 1 and the right opening seat 7 are both axial screws 3, and the axis of the axial screw 3 is arranged parallel to the axis of the pressure screw 6. Figure 1 As shown, when temporary distraction of the vertebral body is not needed, the left distraction plate 2 and the right distraction plate 1 are rotated to a position away from the spinal connecting rod 12. When distraction of the vertebral body is needed, the left distraction plate 2 and the right distraction plate 1 are rotated around the axial screw 3 relative to the left distraction seat 4 and the right distraction seat 7 respectively, and rotated to the position of the spinal connecting rod 12. Then, the slots 10 at the ends of the two distraction plates are clamped on the spinal connecting rod 12. During this process, the rotation directions of the two distraction plates are consistent, and the rotation angle and the clamping angle are consistent, so that they can be well clamped on the spinal connecting rod 12, which is convenient for operation.

[0043] Preferably, a knob 8 is provided at the other end of the pressurizing screw 6 opposite to the block flange 9 to facilitate manual rotation by the doctor, thereby facilitating the rotation of the pressurizing screw 6 .

[0044] It should be noted that one end of the pressure screw 6 with a block flange 9 is inserted into the stepped hole of the left expansion seat 4. The block flange 9 can rotate freely around the axis of the pressure screw 6 in the stepped hole, but cannot move along the axial direction of the pressure screw 6. The right expansion seat 7 is assembled on the rod body of the pressure screw 6 through the threaded hole 11. By utilizing the threaded matching relationship between the threaded hole 11 and the pressure screw 6, when the left expansion piece 2 and the right expansion piece 1 are clamped on the spinal connecting rod 12, the doctor rotates the pressure screw 6 relative to the two expansion seats by turning the knob 8 at the end of the pressure screw 6. Since the two expansion pieces are clamped on the spinal connecting rod 12, the two expansion seats cannot rotate. During the rotation of the pressure screw 6, the right expansion piece 1 can be driven close to or away from the left expansion piece 2 accordingly, thereby realizing the limiting effect on the pedicle screw 13, thereby achieving the doctor's purpose of expanding the adjacent vertebrae of the patient during surgery.

[0045] It should be noted that the left opening piece 2 and the right opening piece 1 in the present embodiment can be designed into various forms such as a straight plate structure, a bent plate structure, a rod-shaped structure, etc. Preferably, the left opening piece 2 and the right opening piece 1 in the present embodiment both have a bending design, and form an obtuse angle at the bending point. The outer walls of the left opening piece 2 and the right opening piece 1 are designed with a smooth transition surface from the proximal end (i.e., the end hinged to the opening seat) to the distal end (i.e., the end with the slot 10), so that the wall thickness formed at the distal end of the smooth transition surfaces on both sides is minimized. The wall thickness between the two smooth transition surfaces is the thickness of each expansion piece along the axial direction of its hinge axis. Specifically, the thickness of the left expansion piece 2 along the axial direction of its hinge axis is the left expansion piece thickness, and the thickness of the left expansion piece gradually decreases in the direction from its hinge axis to its slot 10. The thickness of the right expansion piece 1 along the axial direction of its hinge axis is the right expansion piece thickness, and the thickness of the right expansion piece gradually decreases in the direction from its hinge axis to its slot 10. With such a design, the end of each expansion piece will not block the doctor's sight, and it is easier to make the distal ends of the left expansion piece 2 and the right expansion piece 1 clamped against one side of the U-shaped connector of the pedicle screw 13.

[0046] It should be noted that the slots 10 at the ends of the left and right opening pieces 2 and 1 can be designed into various structural shapes such as U-shaped slots, rectangular slots, semicircular slots, V-shaped slots, etc. Preferably, the slots 10 in this solution are U-shaped slots.

[0047] The method of using the vertebral distraction instrument is to first clamp the slots 10 of the left distraction plate 2 and the right distraction plate 1 between two adjacent pedicle screws 13 of the spinal connecting rod 12, and then rotate the pressure screw 6 to move the right distraction plate 1 away from the left distraction plate 2 along the spinal connecting rod, so that the two adjacent vertebrae are distracted to the target position through the two distraction plates. At this time, the vertebral distraction instrument is fixed with the help of other external forces, so that the rib support and correction operation can be facilitated, thereby improving the success rate of the operation.

[0048] The present invention also provides an auxiliary instrument assembly for spinal orthopedic surgery, including a temporary locking and positioning instrument and the vertebral distraction instrument as described above, the temporary locking and positioning instrument including a main body 18, a compression screw plug 14 and a pressure rod 15, the main body of the main body 18 is a hollow cylindrical structure, the main body 18 includes a screw plug connection part 16 and a clamping part 17 for clamping the spinal connecting rod 12, the screw plug connection part 16 is provided with an internal thread 20 for threading with the compression screw plug 14, the clamping part 17 is connected to the bottom of the screw plug connection part 16, the clamping part 17 includes two clamping parts 26 arranged oppositely, the upper end of each clamping part 26 is integrally connected to the screw plug connection part 16 and can be elastically swung relative to the screw plug connection part 16, and the two clamping parts 26 are provided with an inwardly concave arc on the opposite side. The clamping surface 19 and the upper end of the clamping piece 26 are provided with a pressure rod socket 22, the two pressure rod sockets 22 are connected with the hollow cavity of the main body 18 and form a passage for the pressure rod 15 to pass through, and the extension direction of the passage is arranged to intersect with the longitudinal dividing surface 23 between the two clamping pieces 26. The pressure rod 15 passes through the passage and the two ends of the pressure rod 15 are respectively located at the upper ends of the two clamping pieces 26 (that is, the two ends of the pressure rod 15 are respectively located above the lower side edges of the two pressure rod sockets 22), and the lower end of the clamping screw plug 14 is coaxially fixed with a center rod 25, and the upper side of the pressure rod 15 is provided with a center rivet hole 21 for rotatably cooperating with the center rod 25, and the aperture of the center rivet hole 21 is smaller than the diameter of the clamping screw plug 14, thereby ensuring that the lower end face of the clamping screw plug 14 can be clamped on the upper end of the center rivet hole 21. The clamping screw plug 14 is connected to the pressure rod 15 by reverse riveting. When the clamping screw plug 14 is screwed into the screw plug connecting portion 16 of the main body 18, the lower end surface of the clamping screw plug 14 pushes the pressure rod 15 downward.

[0049] A center rod 25 is fixed at the center of the bottom of the compression screw 14. The center rod 25 is preferably an integrated structure with the compression screw 14. When the compression screw 14 is rotated, the center rod 25 rotates with the compression screw 14 and rises and falls with the compression screw 14 in the screw connection portion 16. A polygonal screw groove 24 is provided at the top of the main body of the compression screw 14 for cooperating with a screw wrench to screw the compression screw 14.

[0050] It should be noted that if Fig.11As shown, the longitudinal dividing plane 23 between the two clamping members 26 is an imaginary plane, which can be used as a symmetrical plane of the through hole where the internal thread 20 of the screw plug connection part 16 is located. The arc-shaped clamping surfaces 19 of the two clamping members 26 are relatively arranged on both sides of the longitudinal dividing plane 23. The upper end of each clamping member 26 is integrally connected to the screw plug connection part 16 and can elastically swing relative to the screw plug connection part 16, that is, the connecting portion between the clamping member 26 and the screw plug connection part 16 can be elastically deformed, and the connecting portion between the clamping member 26 and the screw plug connection part 16 is closer to the longitudinal dividing plane 23 than the position where the pressure rod 15 acts on the clamping member 26. In this arrangement, when the pressure rod 15 located in the passage moves the two clamping members 26, When the upper end of the clamping piece 26 is pressed downward, a force arm is formed between the action position of the pressing rod 15 pressing the clamping piece 26 and the connection position of the clamping piece 26 and the screw plug connection part 16. The downward pressure applied by the pressing rod 15 to the clamping piece 26 will form a rotational torque on the clamping piece 26 with the connection position of the clamping piece 26 and the screw plug connection part 16 as the center. Therefore, during the descending process of the pressing rod 15, the lower ends of the two clamping pieces 26 will approach the middle with the upper end connection position as the center. During the approaching process, the clamping space formed by the two arc-shaped clamping surfaces 19 becomes smaller and smaller, thereby being able to form sufficient clamping force on the spinal connecting rod 12, thereby locking the temporary locking positioning device on the spinal connecting rod 12.

[0051] In addition, the extension direction of the passage is arranged to intersect with the longitudinal dividing plane 23 between the two clamping members 26. This is to ensure that both ends of the pressure rod 15 can apply a rotational torque to the clamping members 26. Further preferably, the extension direction of the above-mentioned passage is designed to be arranged perpendicular to the longitudinal dividing plane 23 in this scheme.

[0052] Preferably, the upper and lower surfaces of the pressing rod 15 are both planes. When the plane structure is pressed on the upper end of the clamping member 16, a more stable contact can be ensured to prevent the pressing rod 15 from shaking back and forth.

[0053] Preferably, the central rivet hole 21 passes through the upper and lower sides of the pressing rod 15 .

[0054] Preferably, the outer peripheral surface of the main body 18 is a cylindrical surface, such as Fig. 9 and Fig.10 As shown. Such a configuration can further reduce the exposed sharp corners of the main body 18, making the overall structure smoother and easier to process. The temporary locking and positioning device is in an assembled state when it leaves the factory. When using it, the doctor only needs to place it in a specific position for surgery and tighten the compression screw plug 14.

[0055] The method of using the auxiliary instrument assembly is as follows: first, the vertebral body is stretched to the desired position by the vertebral body expansion instrument, then, the temporary locking positioning instrument is clamped on the spine connecting rod 12, and the body 18 is abutted against one side of the U-shaped connector of the pedicle screw 13 required for positioning, and then the pressing screw plug 14 is tightened, and the pressing rod 15 is pressed down when the pressing screw plug 14 is tightened, and the two clamping parts 26 are driven to approach each other by the pressing rod 15 compression, so that the clamping part 17 at the bottom of the body 18 is firmly clamped on the spine connecting rod 12, at this time, the pedicle screw 13 that is not locked will not be displaced on the spine connecting rod 12, and the vertebral body is temporarily locked in the target position. At this time, the support and correction operation of the ribs can be conveniently carried out, thereby improving the success rate of the operation. After the operation is completed, the pressing screw plug 14 is loosened again, so that the clamping part 17 releases the clamping of the spine connecting rod 12, thereby removing the temporary locking positioning instrument.

[0056] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An auxiliary instrument assembly for spinal orthopedic surgery, characterized in that: It comprises a temporary locking positioning instrument and a vertebral distraction instrument, the vertebral distraction instrument comprising: a left distraction seat, a left distraction sheet, a right distraction seat, a right distraction sheet, and a pressurizing screw, wherein the outer circumference of the pressurizing screw is provided with an external thread and one end of the pressurizing screw is provided with a clamping block flange, the left distraction seat and the right distraction seat are arranged in parallel, one end of the left distraction seat is provided with a step hole and the other end is hinged to the left distraction sheet, the pressurizing screw is rotatably matched with the step hole through the clamping block flange, and the pressurizing screw is axially limited with the left distraction seat through the axial clamping action of the clamping block flange and the step hole, one end of the right distraction seat is threadedly matched with the pressurizing screw and the other end is hinged to the right distraction sheet, the ends of the left distraction sheet and the ends of the right distraction sheet are both provided with clamping grooves for slidingly clamping a spinal connecting rod; The temporary locking and positioning device comprises a main body, a compression screw plug and a pressure rod. The main body of the main body is a hollow columnar structure. The main body comprises a screw plug connection part and a clamping part for clamping the spinal connecting rod. The screw plug connection part is provided with an internal thread for threading with the compression screw plug. The clamping part is connected to the bottom of the screw plug connection part. The clamping part comprises two clamping parts arranged opposite to each other. The upper end of each clamping part is integrally connected to the screw plug connection part and can be elastically swung relative to the screw plug connection part. The two clamping parts are provided with concave arcs on the opposite sides. shaped clamping surface, a pressure rod socket is provided at the upper end of the clamping piece, the two pressure rod sockets are connected to the hollow cavity of the main body and form a passage for the pressure rod to pass through, the extension direction of the passage is arranged to intersect with the longitudinal dividing surface between the two clamping pieces, the pressure rod passes through the passage and the two ends of the pressure rod are respectively located at the upper ends of the two clamping pieces, a center rod is coaxially fixed to the lower end of the clamping screw plug, a center rivet hole for rotatably cooperating with the center rod is provided on the upper side of the pressure rod, and the aperture of the center rivet hole is smaller than the diameter of the clamping screw plug.

2. The auxiliary device assembly according to claim 1, characterized in that: The hinge axis between the left opening piece and the left opening seat and the hinge axis between the right opening piece and the right opening seat are both axial screws, and the axis of the axial screw is arranged parallel to the axis of the pressure screw.

3. The auxiliary device assembly according to claim 1, characterized in that: The other end of the pressurizing screw rod opposite to the block flange is provided with a knob.

4. The auxiliary device assembly according to claim 1, characterized in that: The axial thickness of the left opening piece along its hinge axis is the left opening piece thickness, and the thickness of the left opening piece gradually decreases in the direction from its hinge axis to the slot. The axial thickness of the right opening piece along its hinge axis is the right opening piece thickness, and the thickness of the right opening piece gradually decreases in the direction from its hinge axis to the slot.

5. The auxiliary device assembly according to claim 1, characterized in that: The card slot is a U-shaped card slot.

6. The auxiliary device assembly according to claim 1, characterized in that: The upper side surface and the lower side surface of the pressing rod are both planes.

7. The auxiliary device assembly according to claim 1, characterized in that: The center rod and the compression screw plug are an integrated structure.

8. The auxiliary device assembly according to claim 1, characterized in that: The central rivet hole (21) passes through the upper and lower sides of the pressing rod (15).

9. The auxiliary device assembly according to claim 1, characterized in that: The outer peripheral surface of the main body (18) is a cylindrical surface.

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