CN113288395A - Multifunctional screw feeding screwdriver for pedicle screw - Google Patents
Multifunctional screw feeding screwdriver for pedicle screw Download PDFInfo
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- CN113288395A CN113288395A CN202110559982.8A CN202110559982A CN113288395A CN 113288395 A CN113288395 A CN 113288395A CN 202110559982 A CN202110559982 A CN 202110559982A CN 113288395 A CN113288395 A CN 113288395A
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
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Abstract
The invention relates to the technical field of medical instruments, in particular to a multifunctional screw feeding screwdriver for pedicle screws. The multifunctional upper screw driver for the pedicle screws comprises an outer tube, an inner rod and a slide block, wherein an inner rod first through hole is formed in the inner cavity of the outer tube, a limiting hole is formed in the upper end surface of the outer tube in a downward mode, and external threads are formed in the lower end of the outer wall of the outer tube; the lower end of the inner rod is provided with a screwdriver head, the lower end of the inner rod penetrates out of the first inner rod through hole of the outer tube, the upper end of the inner rod is positioned above the upper end of the outer tube, and the inner rod and the outer tube are locked or loosened through a first limiting mechanism; an inner rod second through hole is formed in the sliding block, a limiting block is arranged below the sliding block, the sliding block is sleeved on a rod section of the inner rod above the outer tube through the inner rod second through hole, and the sliding block and the inner rod are locked or loosened through a second limiting mechanism. The invention has the advantages of more reasonable structural design, extremely high stability after limiting, difficult damage to the structure, long service life, no friction with the palm and the fingers and great improvement on the nailing efficiency.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a multifunctional screw feeding screwdriver for pedicle screws.
Background
The pedicle screw can be divided into a long-tail screw and a short-tail screw according to the length of the screw seat, and can be divided into a fixed screw and a universal screw according to whether the screw can be subjected to angle adjustment. Different pedicle screws need to use different nailing drivers in the nailing process, and the number of the related nailing tools is large.
In order to improve the universality of the screw driver, part of technicians develops a novel pedicle screw screwing tool. For example, chinese patent application CN109199566A discloses a pedicle screw driver, which comprises a sleeve, an inner rod, a locking device and a gear shifting device; the front end of the sleeve is provided with an external thread which is matched with the internal thread of the tail cap (namely the screw seat) of the pedicle screw; the inner rod is inserted into the sleeve, the front end of the inner rod is used for being inserted into a tail cap of the pedicle screw and matched with the pedicle screw, and the rear end of the inner rod is used for being connected with a handle; the rear end of the inner rod is provided with a section positioning section with a cross section being a regular 12-sided polygon, the positioning section is provided with at least one gear flange, the diameter of the gear flange is equal to that of the inner rod, and the diameter of a circumscribed circle of the positioning section is smaller than that of the inner rod; the locking device is used for locking the sleeve and the inner lever, and the gear shifting device is used for selecting the functions of the locking device.
The pedicle screw feeding device has the following advantages: a plurality of gear flanges can be arranged, so that the pedicle screw retaining device can adapt to pedicle screws with different lengths and types, and has good adaptability; the device can be conveniently disassembled and cleaned, and the operation can be completed only by one set of pedicle screw nailing device in the operation process; after the pedicle screw is locked, the screw can be prevented from loosening, so that the screw can be reliably installed on the pedicle; the locking and rotating transformation between the inner rod and the sleeve can be realized on the basis of not increasing the total length.
The pedicle screw nailing device has the following disadvantages: (1) the insertion connection, the axial limit and the circumferential limit of the inner rod and the outer sleeve are realized through three different gears of the same locking device, steel balls are arranged at two ends of the spring for locking the gears, and the steel balls are clamped in different grooves for limiting, so that the nail feeding device needs to pay attention to not touch a sliding block for adjusting the gears all the time when in use, once the sliding block is easily converted into another mode, the sliding block is not easy to adjust, the sliding block is in an arrangement form with two ends protruding outwards, the sliding block is easily touched, hidden dangers exist in the nail feeding process, and the steel balls and the grooves for limiting the steel balls are easily abraded when the nail feeding device is clinically used, so that the sliding block is not stably locked and easily slides, the damage rate of the locking device is high, and the locking device is frequently required to be replaced; (2) the inner rod is inserted with the nail head of the pedicle screw, the sleeve and the internal thread of the nail seat are screwed and connected, and then the outer sleeve needs to be assisted by a hand, the friction force between the outer sleeve and the palm and the fingers is large in the screwing process of the nail, the nailing efficiency is influenced, and the arm can feel uncomfortable.
Disclosure of Invention
The invention aims to provide a multifunctional screw feeding screwdriver for pedicle screws, which overcomes the defects of the prior art, the axial limiting structure and the circumferential limiting structure of the inner rod and the outer tube are designed in a split mode, the structural design is more reasonable, the stability after limiting is extremely high, the structure is not easy to damage, the service life is long, the outer wall of the outer tube is rotatably provided with a conveniently-detached holding sleeve, the holding sleeve is held by a hand in the screw feeding process, the inner rod and the outer rod which are integrally screwed and locked are rotated, the rotation is formed between the holding sleeve and the outer tube, no friction is generated between the holding sleeve and a palm and fingers, and the screw feeding efficiency is greatly improved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a pedicle of vertebral arch screw is with multi-functional nail bottle opener of going up, includes outer tube, interior pole and slider, wherein:
an inner rod first through hole is formed in the inner cavity of the outer tube, a limiting hole is formed in the upper end face of the outer tube in a downward mode, the limiting hole is communicated with the inner rod first through hole, an external thread is formed in the lower end of the outer wall of the outer tube, and the external thread is matched with the screw seat internal thread of the pedicle screw;
the lower end of the inner rod is provided with a screwdriver head which is matched with a spherical nail cap of the pedicle screw, the lower end of the inner rod penetrates out of a first through hole of the inner rod of the outer tube downwards, the upper end of the inner rod is positioned above the upper end of the outer tube, and the inner rod and the outer tube are locked or loosened through a first limiting mechanism;
an inner rod second through hole is formed in the sliding block, a limiting block is arranged below the sliding block, the sliding block is sleeved on a rod section of the inner rod above the outer tube through the inner rod second through hole, the sliding block and the inner rod are locked or loosened through a second limiting mechanism, and the limiting block of the sliding block can extend into the limiting hole of the outer tube;
when the vertebral pedicle screw seat is used, the inner rod is adjusted to a proper position in the outer tube according to the length of the vertebral pedicle screw seat, so that the distance between the screwdriver head and the outer thread of the outer tube is matched with the distance between the vertebral pedicle screw seat and the spherical screw cap, the inner rod and the outer rod are limited by the first limiting mechanism, the inner rod and the outer rod can only move a small distance along the axial direction, the inner rod can rotate in the outer tube in the circumferential direction, the position of the sliding block on the inner rod is adjusted according to the length of the distance which the inner rod can move in the outer tube, a limiting block at the lower end of the sliding block can be inserted into or pulled out of the limiting hole, the screwdriver head of the inner rod is inserted into the spherical screw cap of the vertebral pedicle screw, the position of the vertebral pedicle screw is limited by the screw body of the outer tube, the outer thread of the outer tube is screwed onto the inner thread of the vertebral pedicle screw seat, the inner rod is matched with the outer tube, so that the vertebral pedicle screw is kept straight, and the limiting block at the lower end of the sliding block is pushed into the limiting hole, make the circumference position of interior pole and outer pole locked, interior pole and outer pole locking as an organic whole for go up the nail process more steady rapidly, go up and lift the slider after the nail is accomplished, make the stopper break away from spacing hole, be convenient for take off the pedicle of vertebral arch screw smoothly with multi-functional nail bottle opener of going up.
Further, the outer tube screwing device further comprises a holding sleeve, a first through hole of the outer tube is formed in the holding sleeve, the holding sleeve is arranged on the outer wall of the outer tube through the first through hole of the outer tube, the outer tube and the holding sleeve are locked or loosened through a third limiting mechanism, the third limiting mechanism locks the outer tube and can rotate in the circumferential direction when the holding sleeve is locked, under the condition that the inner tube and the outer tube are locked in the circumferential direction, the holding sleeve is held in a hand and screwed on the outer tube, the inner wall of the holding sleeve and the outer wall of the outer tube rotate, the holding sleeve and a palm and fingers cannot move, friction cannot be generated between the holding sleeve and the palm and the fingers, and the nailing efficiency is greatly improved.
Further, a first limiting mechanism comprises a first button and a first spring, a first button mounting groove is formed in the pipe wall of the outer pipe, the first button mounting groove is perpendicular to the first punched hole in the inner rod, the groove bottom of the second button mounting groove is fixedly connected with one end of the first spring, the other end of the first spring is fixedly connected with the first button, an inner rod third punched hole is formed in the first button, the first button can be pressed to enable the first punched hole in the inner rod to be overlapped with the inner rod third punched hole, the inner rod can be conveniently inserted and extracted, and the first button can enable the first punched hole in the inner rod to be staggered with the inner rod third punched hole when the first button is loosened.
Furthermore, a first strip hole is formed in the first button, a first pin is longitudinally fixed to the first button mounting groove, the first pin vertically penetrates through the first strip hole, and the first strip hole and the first pin form a movement guiding effect of the first button when the first button is pressed.
Furthermore, a plurality of annular grooves are formed in the rod wall of the inner rod at intervals, the length of each annular groove is larger than the width of the corresponding first button, the position of each first limiting mechanism corresponds to the position of one of the annular grooves, the first spring is in a natural telescopic state and generates a force for moving the first button to the outside of the corresponding first button mounting groove, one side of the second through hole of the inner rod extends into the annular groove, the inner rod can move axially along the length distance of the annular groove under the limitation of the annular groove and the second through hole of the inner rod, when the inner rod moves downwards, the limiting block of the sliding block can be inserted into the limiting hole of the outer tube, and when the inner rod is lifted upwards, the limiting block of the sliding block is separated from the limiting hole of the outer tube.
Further, second stop gear includes second button and second spring, be provided with the second button mounting groove on the outer wall of slider, the second button mounting groove sets up with interior pole second perforation is perpendicular, the tank bottom of second button mounting groove and the one end fixed connection of second spring, the other end and the second of second spring press button fixed connection, it is fenestrate to have seted up interior pole fourth on the second button, press down the second button and can make interior pole second perforation and interior pole fourth perforation overlap, be convenient for remove the slider, adjust its position on the inner rod, it can make interior pole second perforation and interior pole fourth perforation dislocation to loosen the second button, fix the position of slider.
Furthermore, a second strip hole is formed in the second button, a second column pin is longitudinally fixed to the second button mounting groove and vertically penetrates through the second strip hole, and the second strip hole and the second column pin form a movement guiding effect of the second button when the second button is pressed.
Furthermore, be provided with a plurality of button draw-in grooves with second stop gear's second button matched with on the interior pole, second stop gear card corresponds with the first stop gear of card in different annular grooves in the button draw-in groove of difference to do benefit to the stopper and insert spacing hole smoothly.
Further, third stop gear includes third button and third spring, the third button mounting groove has been seted up on the control sleeve, the third button mounting groove sets up with the outer tube perforation of control sleeve is perpendicular, the tank bottom of third button mounting groove and the one end fixed connection of third spring, the other end and the third button fixed connection of third spring, it perforates to have seted up the outer tube second on the third button, press the third button and can make the first perforation of outer tube and the perforation of outer tube second overlap, be convenient for establish the control sleeve on the outer tube, it can make the first perforation of outer tube and the perforation dislocation of outer tube second to loosen the second button, be provided with the round recess on the outer wall of outer tube, control sleeve can carry out the rotation in a circumferential direction when third stop gear's position and groove position correspond and lock.
Furthermore, a third strip hole is formed in the third button, a third pin is longitudinally fixed to the third button mounting groove, and the third pin vertically penetrates through the third strip hole.
The invention has the beneficial effects that: compared with the prior art, the multifunctional screw driver for the pedicle screw has the following advantages: (1) adjusting the inner rod to a proper position in the outer tube according to the length of the pedicle screw seat, enabling the distance between the screwdriver head and the outer thread of the outer tube to be matched with the distance between the pedicle screw seat and the spherical screw cap, limiting the inner rod and the outer rod through a first limiting mechanism, enabling the inner rod and the outer rod to only move a small distance along the axial direction, enabling the inner rod to rotate circumferentially in the outer tube, adjusting the position of the sliding block on the inner rod according to the length of the distance that the inner rod can move in the outer tube, enabling a limiting block at the lower end of the sliding block to be inserted into or pulled out of a limiting hole, inserting the screwdriver head of the inner rod into the spherical screw cap of the pedicle screw, limiting the position of the screw body of the pedicle screw, screwing the outer thread of the outer tube onto the inner thread of the pedicle screw seat, matching the inner rod with the outer tube, keeping the pedicle screw straight, pushing the limiting block at the lower end of the sliding block into the limiting hole, the circumferential positions of the inner rod and the outer rod are locked, the inner rod and the outer rod are locked into a whole, the nailing process is more stable and rapid, the sliding block is lifted up after the nailing is completed, the limiting block is separated from the limiting hole, and the multifunctional nailing screwdriver for pedicle screws is convenient to take down smoothly; (2) under the circumstances of interior pole and outer tube circumference locking, when handheld control cover revolves to twist the outer tube, control and rotate between cover inner wall and the outer tube outer wall, control and do not move between cover and palm and the finger, can not produce the friction with palm and finger, greatly improve and go up nail efficiency.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic structural view of an outer tube according to the present invention;
FIG. 3 is a schematic structural view of the first position-limiting mechanism of the present invention in a state of being removed from the outer tube;
FIG. 4 is a schematic view of the inner rod of the present invention;
FIG. 5 is a schematic view of the structure of the inner rod with the slider mounted thereon according to the present invention;
FIG. 6 is a schematic structural view of the second limiting mechanism of the present invention taken off from the slider;
FIG. 7 is a schematic structural view of the outer tube, the grip sleeve and the third limiting mechanism after being disassembled;
the self-locking type pedicle screw driver comprises an outer tube 1, a first through hole 101, a limiting hole 102, an external thread 103, a first button mounting groove 104, a groove 105, a 2 inner rod 201 screwdriver head, an annular groove 202, a button clamping groove 203, a sliding block 3, a second through hole 301, a limiting block 302, a second button mounting groove 303, a holding sleeve 4, a first through hole 401 of the outer tube 401, a third button mounting groove 402, a pedicle screw 5, a nail seat 501, a spherical nail cap 502, a first limiting mechanism 6, a first button 601, a first spring 602, a third through hole 603, a first strip hole 604, a first pin 605, a second limiting mechanism 701, a second button 702, a second spring 703 a fourth through hole of the inner rod 703, a second strip hole 704, a second pin 705, a third limiting mechanism 8, a third button 801, a third spring 802, a second through hole 803 of the outer tube, a third strip hole 804 and a third pin 805.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In the embodiment shown in fig. 1-7, a multifunctional screw driver for pedicle screws 5 comprises an outer tube 1, an inner rod 2 and a slide block 3, wherein:
an inner rod first through hole 101 is formed in the inner cavity of the outer tube 1, a limiting hole 102 is formed in the upper end face of the outer tube 1 downwards, the limiting hole 102 is communicated with the inner rod first through hole 101, an external thread 103 is formed in the lower end of the outer wall of the outer tube 1, and the external thread 103 is matched with an internal thread of a nail seat 501 of a pedicle screw 5;
the lower end of the inner rod 2 is provided with a screwdriver head 201, the screwdriver head 201 is matched with a spherical nail cap 502 of the pedicle screw 5, the lower end of the inner rod 2 penetrates out of a first inner rod through hole 101 of the outer tube 1, the upper end of the inner rod 2 is positioned above the upper end of the outer tube 1, and the inner rod 2 and the outer tube 1 are locked or loosened through a first limiting mechanism 6;
an inner rod second through hole 301 is formed in the sliding block 3, a limiting block 302 is arranged below the sliding block 3, the sliding block 3 is sleeved on a rod section of the inner rod 2 above the outer tube 1 through the inner rod second through hole 301, the sliding block 3 and the inner rod 2 are locked or loosened through a second limiting mechanism 7, and the limiting block 302 of the sliding block 3 can extend into a limiting hole 102 of the outer tube 1;
when the pedicle screw 5 nail seat structure is used, the inner rod 2 is adjusted to a proper position in the outer tube 1 according to the length of the pedicle screw 5 nail seat 501, so that the distance between the screwdriver head 201 and the outer thread 103 of the outer tube 1 is matched with the distance between the pedicle screw 5 nail seat 501 and the spherical nail cap 502, the inner rod 2 and the outer rod are limited by the first limiting mechanism 6, the inner rod 2 and the outer rod can only move a small distance along the axial direction, the inner rod 2 can circumferentially rotate in the outer tube 1, the position of the sliding block 3 on the inner rod 2 is adjusted according to the moving distance of the inner rod 2 in the outer tube 1, so that the limiting block 302 at the lower end of the sliding block 3 can be inserted into the limiting hole 102 or pulled out of the limiting hole 102, the screwdriver head 201 of the inner rod 2 is inserted into the spherical nail cap 502 of the pedicle screw 5, the position of the pedicle screw 5 is limited, the outer thread 103 of the outer tube 1 is screwed on the inner thread of the pedicle screw 5 nail seat 501, interior pole 2 and the cooperation of outer tube 1 for pedicle of vertebral arch screw 5 keeps straight, pushes spacing hole 102 with the stopper 302 of the lower extreme of slider 3 this moment in, makes the circumferential position of interior pole 2 and outer pole locked, and interior pole 2 and outer pole locking are as an organic whole, makes the process of nailing more steady rapid, lifts slider 3 after the completion of nailing, makes stopper 302 break away from spacing hole 102, is convenient for take off pedicle of vertebral arch screw 5 smoothly with multi-functional nail bottle opener.
In this embodiment, the nail feeding device further includes a holding sleeve 4, an outer tube first through hole 401 is formed in the holding sleeve 4, the holding sleeve 4 is sleeved on the outer wall of the outer tube 1 through the outer tube first through hole 401, the outer tube 1 and the holding sleeve 4 are locked or unlocked through a third limiting mechanism 8, the holding sleeve 4 can rotate in the circumferential direction when the third limiting mechanism 8 locks the outer tube 1 and the holding sleeve 4, under the condition that the inner rod 2 and the outer tube 1 are locked in the circumferential direction, when the outer tube 1 is screwed by holding the holding sleeve 4 in a rotating manner, the inner wall of the holding sleeve 4 rotates with the outer wall of the outer tube 1, the holding sleeve 4 does not move with a palm and fingers, friction with the palm and the fingers cannot be generated, and the nail feeding efficiency is greatly improved.
In this embodiment, the first limiting mechanism 6 includes a first button 601 and a first spring 602, a first button mounting groove 104 has been seted up on the pipe wall of the outer pipe 1, the first button mounting groove 104 is perpendicular to the first through hole 101 of the inner rod, the bottom of the first button mounting groove 104 is fixedly connected with one end of the first spring 602, the other end of the first spring 602 is fixedly connected with the first button 601, the third through hole 603 of the inner rod has been seted up on the first button 601, pressing the first button 601 can make the first through hole 101 of the inner rod and the third through hole 603 of the inner rod overlap, it is convenient to insert and take out the inner rod 2, loosening the first button 601 can make the first through hole 101 of the inner rod and the third through hole 603 of the inner rod dislocate.
In this embodiment, the first button 601 is provided with a first elongated hole 604, the first button mounting groove 104 is longitudinally fixed with a first pin 605, the first pin 605 vertically passes through the first elongated hole 604, and the first elongated hole 604 and the first pin 605 form a movement guiding function of the first button 601 when the first button 601 is pressed.
In this embodiment, a plurality of annular grooves 202 are arranged on the rod wall of the inner rod 2 at intervals, the length of each annular groove 202 is greater than the width of each first button 601, the position of each first limiting mechanism 6 corresponds to the position of one of the annular grooves 202, the first spring 602 is in a natural telescopic state, and generates a force for moving the first button 601 to the outside of the first button installation groove 104, so that one side of the inner rod second through hole 301 extends into the annular groove 202, the inner rod 2 can move along the length of the annular groove 202 under the limitation of the annular groove 202 and the inner rod second through hole 301, when the inner rod 2 moves down, the limiting block 302 of the slider 3 can be inserted into the limiting hole 102 of the outer tube 1, and when the inner rod 2 is lifted up, the limiting block 302 of the slider 3 is separated from the limiting hole 102 of the outer tube 1.
In this embodiment, the second limiting mechanism 7 includes a second button 701 and a second spring 702, a second button installation groove 303 is provided on the outer wall of the slider 3, the second button installation groove 303 is perpendicular to the inner rod second through hole 301, the groove bottom of the second button installation groove 303 is fixedly connected to one end of the second spring 702, the other end of the second spring 702 is fixedly connected to the second button 701, the inner rod fourth through hole 703 is provided on the second button 701, the inner rod second through hole 301 and the inner rod fourth through hole 703 can be overlapped by pressing the second button 701, the slider 3 is convenient to move, the position of the slider 3 on the inner rod 2 is adjusted, the inner rod second through hole 301 and the inner rod fourth through hole 703 can be dislocated by releasing the second button 701, and the position of the slider 3 is fixed.
In this embodiment, the second button 701 is provided with a second elongated hole 704, a second column pin 705 is longitudinally fixed to the second button mounting groove 303, the second column pin 705 vertically penetrates through the second elongated hole 704, and the second elongated hole 704 and the second column pin 705 form a motion guiding function of the second button 701 when the second button 701 is pressed.
In this embodiment, be provided with a plurality of button draw-in grooves 203 with second button 701 matched with of second stop gear 7 on interior pole 2, second stop gear 7 card corresponds with the first stop gear 6 of card in different annular groove 202 in the button draw-in groove 203 of difference to do benefit to stopper 302 and insert spacing hole smoothly.
In this embodiment, the third limiting mechanism 8 includes a third button 801 and a third spring 802, the holding sleeve 4 is provided with a third button mounting groove 402, the third button mounting groove 402 is perpendicular to the outer tube through hole on the holding sleeve 4, a groove bottom of the third button mounting groove 402 is fixedly connected to one end of the third spring 802, the other end of the third spring 802 is fixedly connected to the third button 801, the third button 801 is provided with an outer tube second through hole 803, pressing the third button 801 can overlap the outer tube first through hole 401 and the outer tube second through hole 803, so as to facilitate sleeving the holding sleeve 4 on the outer tube 1, releasing the second button 701 can dislocate the outer tube first through hole 401 and the outer tube second through hole 803, the outer wall of the outer tube 1 is provided with a circle of grooves 105, and when the position of the third limiting mechanism 8 corresponds to the position of the grooves 105, the holding sleeve 4 can rotate circumferentially.
In this embodiment, a third elongated hole 804 is formed in the third button 801, a third pin 805 is longitudinally fixed to the third button mounting groove 402, and the third pin 805 vertically passes through the third elongated hole 804.
The above embodiments are only specific examples of the present invention, and the protection scope of the present invention includes but is not limited to the product forms and styles of the above embodiments, and any suitable changes or modifications made by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a pedicle of vertebral arch screw is with multi-functional nail bottle opener of going up which characterized in that: including outer tube, interior pole and slider, wherein:
an inner rod first through hole is formed in the inner cavity of the outer tube, a limiting hole is formed in the upper end face of the outer tube in a downward mode, the limiting hole is communicated with the inner rod first through hole, an external thread is formed in the lower end of the outer wall of the outer tube, and the external thread is matched with the screw seat internal thread of the pedicle screw;
the lower end of the inner rod is provided with a screwdriver head which is matched with a spherical nail cap of the pedicle screw, the lower end of the inner rod penetrates out of a first through hole of the inner rod of the outer tube downwards, the upper end of the inner rod is positioned above the upper end of the outer tube, and the inner rod and the outer tube are locked or loosened through a first limiting mechanism;
the slider is provided with an inner rod second through hole, a limiting block is arranged below the slider, the slider is sleeved on a rod section of the inner rod above the outer tube through the inner rod second through hole, the slider and the inner rod are locked or loosened through a second limiting mechanism, and the limiting block of the slider can stretch into a limiting hole of the outer tube.
2. The multifunctional screw driver for pedicle screws as claimed in claim 1, wherein: the outer tube clamping device is characterized by further comprising a holding sleeve, a first through hole of the outer tube is formed in the holding sleeve, the holding sleeve is sleeved on the outer wall of the outer tube through the first through hole of the outer tube, the outer tube and the holding sleeve are locked or loosened through a third limiting mechanism, and the holding sleeve can rotate in the circumferential direction when the outer tube and the holding sleeve are locked through the third limiting mechanism.
3. The multifunctional screw driver for pedicle screws as claimed in claim 1, wherein: first stop gear includes first button and first spring, first button mounting groove has been seted up on the pipe wall of outer tube, first button mounting groove sets up with interior first perforation of pole perpendicularly, the tank bottom of first button mounting groove and the one end fixed connection of first spring, the other end and the first button fixed connection of first spring, it perforates to have seted up interior pole third on the first button, press down first button and can make interior pole first perforation and interior pole third perforation overlap, loosen first button and can make interior pole first perforation and interior pole third perforation dislocation.
4. The multifunctional screw driver for pedicle screws as claimed in claim 3, wherein: first rectangular hole has been seted up on the first button, longitudinally fixed with first pin on the first button mounting groove, first pin passes first rectangular hole perpendicularly.
5. The multifunctional screw driver for pedicle screws as claimed in claim 3, wherein: a plurality of annular grooves are formed in the rod wall of the inner rod at intervals, the length of each annular groove is larger than the width of the corresponding first button, and the position of each first limiting mechanism corresponds to the position of one annular groove.
6. The multifunctional screw driver for pedicle screws as claimed in claim 1, wherein: the second stop gear includes second button and second spring, be provided with the second button mounting groove on the outer wall of slider, the second button mounting groove sets up with interior pole second perforation is perpendicular, the tank bottom of second button mounting groove and the one end fixed connection of second spring, the other end and the second of second spring press button fixed connection, the pole fourth perforation in having seted up on the second button, press the second button and can make interior pole second perforation and interior pole fourth perforation overlap, loosen the second button and can make interior pole second perforation and interior pole fourth perforation dislocation.
7. The multifunctional screw driver for pedicle screws as claimed in claim 6, wherein: and a second strip hole is formed in the second button, a second column pin is longitudinally fixed on the second button mounting groove, and the second column pin vertically penetrates through the second strip hole.
8. The multifunctional screw driver for pedicle screws as claimed in claim 6, wherein: the inner rod is provided with a plurality of button clamping grooves matched with the second buttons of the second limiting mechanisms.
9. The multifunctional screw driver for pedicle screws as claimed in claim 2, wherein: the third stop gear includes third button and third spring, it has seted up the third button mounting groove to control to sheathe in, the third button mounting groove sets up with controlling the outer tube perforation of sheathe perpendicularly, the tank bottom of third button mounting groove and the one end fixed connection of third spring, the other end and the third button fixed connection of third spring, it perforates to have seted up the outer tube second on the third button, press the third button and can make the first perforation of outer tube and the perforation of outer tube second overlap, it can make the first perforation of outer tube and the perforation dislocation of outer tube second to loosen the second button, be provided with the round recess on the outer wall of outer tube, it can carry out the rotation in a circumferential direction to control the cover when third stop gear's position corresponds the locking with the groove position.
10. The multifunctional screw driver for pedicle screws as claimed in claim 9, wherein: and a third strip hole is formed in the third button, a third pin is longitudinally fixed on the third button mounting groove, and the third pin vertically penetrates through the third strip hole.
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| CN202110559982.8A CN113288395B (en) | 2021-05-21 | 2021-05-21 | Multifunctional screw driver for pedicle screws |
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| CN202110559982.8A CN113288395B (en) | 2021-05-21 | 2021-05-21 | Multifunctional screw driver for pedicle screws |
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| CN113288395B CN113288395B (en) | 2022-08-16 |
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| Publication number | Publication date |
|---|---|
| CN113288395B (en) | 2022-08-16 |
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