CN107374718B - Broken screw taking device - Google Patents
Broken screw taking device Download PDFInfo
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- CN107374718B CN107374718B CN201710711027.5A CN201710711027A CN107374718B CN 107374718 B CN107374718 B CN 107374718B CN 201710711027 A CN201710711027 A CN 201710711027A CN 107374718 B CN107374718 B CN 107374718B
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- driving
- rod
- screw
- barrel body
- clamping jaws
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- 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
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1695—Trepans or craniotomes, i.e. specially adapted for drilling thin bones such as the skull
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- 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
- A61B2017/564—Methods for bone or joint treatment
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Orthopedic Medicine & Surgery (AREA)
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- General Health & Medical Sciences (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
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- Animal Behavior & Ethology (AREA)
- Neurosurgery (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a screw broken-nail taking device which comprises a barrel body, a plurality of clamping jaws and a driving assembly for driving the clamping jaws to be mutually folded, wherein the bottom surface of the barrel body is provided with a plurality of openings, the driving assembly comprises a threaded sleeve and a driving rod coaxially fixed in the threaded sleeve, the driving rod is arranged in the barrel body, one end, opposite to the threaded sleeve, of the driving rod is provided with a driving structure for driving the clamping jaws, an inner annular wall of the threaded sleeve is provided with an inner thread, an outer annular wall of the barrel body is provided with an outer thread, and the inner thread is in threaded connection with the outer thread, so that when the barrel body and the threaded sleeve relatively rotate, the driving rod is driven to move along the axial direction of the barrel body, the clamping. By adopting the arrangement, the claw hand is folded by the rotation of the threaded sleeve, the required operation space is smaller compared with a mode of tightening the claw through the handle, and the clamping claw is fixed to a certain extent after being tightened, so that an operator is not required to exert force all the time to clamp the screw.
Description
Technical Field
The invention relates to a medical instrument, in particular to a broken screw taking device.
Background
When a fracture injury occurs, it is often necessary to drive screws into the fracture to assist in healing of the fracture. However, when the fracture heals for a long time, the fatigue strength of the screw reaches a limit, and when the doctor takes the screw, the screw is easily roughened or broken, even if the screw is broken before taking the screw. After the screw is roughened or broken, the medical personnel still need to remove the screw. The conventional methods for removing the roughened or broken screw are mainly two types:
firstly, polish to grinding the bone thoroughly along screw length direction with the trephine, take out the screw again, this method needs to grind whole bone thoroughly along screw length's direction, and operating time is long and the injury that causes the bone is big, the condition such as fracture once more takes place even.
Secondly, firstly, a trephine is used for grinding a distance inwards from the opening of the screw along the screw, then the screw is screwed out by tools such as a pliers, the method does not need to grind the whole bone completely along the length direction of the screw, only needs to grind the distance for the pliers to grab the screw along the length direction of the screw, however, the pliers need to be stretched into the grinding hole, so that the grinding hole needs to be very large, the bone is greatly damaged, and when the screw is tightly connected with the bone, the clamping force provided by an operator is insufficient, and the pliers are difficult to screw out the screw.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a broken screw taking device, which only needs to grind the bone around the screw along the length direction of the screw and a screw taking device which can extend into the bone along the length direction of the screw and can be screwed down to provide clamping force and then unscrew the screw.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a disconnected nail of screw is got nail device which characterized in that: including the staving, a plurality of jack catch and the drive assembly who is used for driving the jack catch and draws in each other, a plurality of opening has been seted up to the bottom surface of staving, a plurality of jack catch articulates in the staving and stretches out from a plurality of opening respectively, drive assembly includes swivel nut and the coaxial actuating lever of fixing in the swivel nut, the actuating lever sets up in the staving, be provided with the internal thread on the inner ring wall of swivel nut, be provided with the external screw thread on the outer ring wall of staving, internal thread and external screw thread threaded connection, when the staving rotates with the swivel nut relatively, the axial displacement of drive actuating lever along the staving, the one end of actuating lever back to the swivel nut is provided with the linkage structure who is used for making drive jack catch and actuating lever linkage, when the actuating lever.
As a further improvement of the invention, the linkage structure comprises driving claws the number of which is the same as that of the claws, the diameter of one end of the driving rod, which is back to the screw sleeve, is gradually reduced to form a driving inclined plane, the driving claws and the claws are correspondingly bent and connected one by one to form a pushing opening for the end part of the driving rod, which is back to the screw sleeve, to extend into, when the driving rod moves towards the claws, the driving inclined plane enters the pushing opening to be attached to the driving claws, and the driving claws are pushed to turn outwards to drive the claws to fold.
As a further improvement of the invention, the driving rod comprises a driving part and a connecting part, the diameter of the driving part is larger than that of the connecting part, one end of the connecting part is coaxially fixed with the threaded sleeve, the other end of the connecting part is coaxially fixed with the driving part, and the driving inclined plane is arranged on the driving part.
As a further improvement of the invention, the driving part is rotatably arranged on the connecting part, the driving inclined plane is provided with a limit groove matched with the driving claw, and when the driving rod is contacted with the driving claw, the driving claw slides into the limit groove to prevent the driving part from rotating.
As a further improvement of the invention, the linkage structure comprises a connecting rod, an arc-shaped track, a first pin shaft and a second pin shaft, one end of the connecting rod is hinged with the driving rod through the first pin shaft, the other end of the connecting rod is hinged with the clamping jaw through the second pin shaft, the second pin shaft is arranged in the track in a sliding mode, so that when the driving rod moves, the end portion of the clamping jaw and the end portion of the connecting rod move along the track along with the second pin shaft, a furling section is arranged on the track, and when the second pin shaft is in the furling section, the clamping jaws are furled.
As a further improvement of the invention, a locking mechanism for locking the barrel body and the threaded sleeve is arranged on the driving rod, the locking mechanism comprises a locking rod, a rack, a sleeve, a spring and a positioning ball, a mounting groove is arranged on the driving rod, the locking rod is hinged in the mounting groove, a first through hole is arranged on the threaded sleeve, one end of the locking rod extends into the mounting groove, the other end of the locking rod extends out of the first through hole to form a poking part for being poked by a person, a second through hole is arranged on the side wall of the mounting groove, the rack is fixed at one end of the locking rod, which is opposite to the poking part, and extends out of the second through hole, a locking tooth is arranged in the barrel body, the sleeve is fixed at one side of the rack, which is opposite to the locking rod, the spring and the positioning ball are arranged in the sleeve, a W-shaped positioning groove is, the detent ball is shifted between two lower positions of the detent groove, thereby engaging or disengaging the rack with or from the locking teeth.
As a further improvement of the invention, one surface of the plurality of claws facing to the furling direction is provided with a plurality of fixed teeth.
As a further improvement of the invention, elastic isolating membranes for closing the openings are arranged at the openings, and a plurality of clamping jaws penetrate through the isolating membranes, are connected with the isolating membranes in a sealing mode and extend out of the openings.
As a further improvement of the invention, the barrel-shaped anti-blocking device further comprises a protective sleeve for protecting the clamping jaws, the protective sleeve is barrel-shaped, a thread groove is formed in the inner annular wall of the protective sleeve, and the thread groove is in threaded connection with an external thread on the barrel body to fix the protective sleeve on the barrel body.
The clamping device has the beneficial effects that by adopting the arrangement, the driving rod is driven to move through the rotation of the threaded sleeve, the driving rod drives the linkage structure to move, so that the claw hand is folded, compared with the mode that an operator tightens the claw through the operating handle, the clamping device does not need to provide a moving space for the operating handle during clamping, the required operating space is small, and the clamping device has a certain fixing effect on the claw after tightening, so that the claw keeps the state of clamping the screw without the operator exerting force all the time to clamp the screw.
Drawings
FIG. 1 is a block diagram of a first embodiment of the present invention;
FIG. 2 is a block diagram of a second embodiment of the present invention;
FIG. 3 is a block diagram of the drive pawl and jaws.
Detailed Description
The invention will be further described in detail with reference to the following examples, which are given in the accompanying drawings.
Referring to fig. 1 to 3, the screw breaking and removing device of the present embodiment is characterized in that: including staving 1, a plurality of jack catch 2 and the drive assembly who is used for driving jack catch 2 to draw in each other, a plurality of opening 3 has been seted up to the bottom surface of staving 1, a plurality of jack catch 2 articulates in staving 1 and stretches out from a plurality of opening 3 respectively, drive assembly includes swivel nut 4 and the coaxial actuating lever 5 of fixing in swivel nut 4, actuating lever 5 sets up in staving 1, be provided with the internal thread on the inner ring wall of swivel nut 4, be provided with the external screw thread on the outer ring wall of staving 1, internal thread and external screw thread threaded connection, when staving 1 rotates with swivel nut 4 relatively, the axial displacement of drive actuating lever 5 along staving 1, the one end of actuating lever 5 back to swivel nut 4 is provided with the linkage structure who is used for making drive jack catch 2 and actuating lever 5 linkage, when actuating lever 5 moves towards jack catch 2, draw in the linkage structure and drive jack.
Through the arrangement, after an operator grinds bones around a screw to a certain depth by using a trephine, the claw 2 extends into a ground hole, the turnbuckle 4 is rotated to enable the turnbuckle 4 to move towards the claw 2 along the axial direction of the barrel body 1, the turnbuckle 4 drives the driving rod 5 to move towards the claw 2, the driving rod 5 drives the linkage structure to drive the claws 2 to gather together, so that the screw is clamped, the operator continues to rotate the turnbuckle 4 to unscrew the screw from the bone, the driving rod 5 is driven to move by the rotation of the turnbuckle 4, the driving rod 5 drives the linkage structure to move, so that the claw 2 is gathered, compared with a mode of tightening the claw 2 through a handle, the novel screw clamping device does not need to provide a moving space for the handle during clamping, the required operating space is small, and after tightening, the turnbuckle 4 has a certain fixing effect on the claw 2, so that the claw 2 keeps the state of clamping the screw, no operator is required to exert force all the time to clamp the screw.
As an improved specific implementation mode, the linkage structure comprises driving claws 7 the number of which is the same as that of the claws 2, the diameter of one end, back to the screw sleeve 4, of the driving rod 5 is gradually reduced to form a driving inclined surface 6, the driving claws 7 are in one-to-one bending connection with the claws 2 to form a pushing opening for the end part, back to the screw sleeve 4, of the driving rod to stretch into, when the driving rod 5 moves towards the claws 2, the driving inclined surface 6 enters the pushing opening to be attached to the driving claws 7, and the driving claws 7 are pushed to turn outwards to drive the claws 2 to fold.
Operating personnel rotates swivel nut 4, drive actuating lever 5 and remove towards jack catch 2, make drive inclined plane 6 and the laminating of drive pawl 7, increase the area of contact of drive inclined plane 6 with jack catch 2, avoid the tip direct contact of drive inclined plane 6 with jack catch 2, make the steady drive jack catch 2 in drive inclined plane 6, and can avoid drive inclined plane 6 to be bruised by the tip of jack catch 2, then actuating lever 5 continues to move, make the one end of drive inclined plane 6 drive jack catch 2 slide along drive inclined plane 6, outwards overturn, drive jack catch 2 along the pin joint swing, make jack catch 2 draw in each other, thereby clip the screw. The driving inclined plane 6 directly props against the driving claw 7 so as to drive the claw 2 to fold, the force transmission structure is simple and direct, the force is prevented from being consumed in the transmission process, and a larger clamping force is provided for the claw 2.
As a modified specific embodiment, the driving rod 5 includes a driving portion 51 and a connecting portion 52, the driving portion 51 has a diameter larger than that of the connecting portion 52, one end of the connecting portion 52 is coaxially fixed with the screw sleeve 4, the other end is coaxially fixed with the driving portion 51, and the driving bevel 6 is disposed on the driving portion 51.
Dividing the drive lever 5 into the drive portion 51 and the connecting portion 52, the connecting portion 52 having a smaller diameter than the drive portion 51, can reduce the material required for the drive lever 5 while ensuring the function of the drive lever 5.
As a modified specific embodiment, the driving portion 51 is rotatably mounted on the connecting portion 52, the driving inclined surface 6 is provided with a limiting groove 11 matched with the driving pawl 7, and when the driving rod 5 contacts with the driving pawl 7, the driving pawl 7 slides into the limiting groove 11 to prevent the driving portion 51 from rotating.
When the screw sleeve 4 drives the driving rod 5 to move, the driving claw 7 extends into the limiting groove 11, so that the driving part 51 does not rotate and deviate any more, and then the driving claw 7 is driven in the limiting groove 11 to drive the clamping claws 2 to be mutually folded. The driving part 51 is rotatably connected with the connecting part 52, and the limiting function of the limiting groove 11 and the driving claw 7 ensures that the driving part 51 does not have rotating friction with the surface of the driving claw 7 when the driving claw 7 is driven, thereby reducing the abrasion of the driving part 51 and the driving claw 7 and the force consumption in the driving process, saving labor and prolonging the service life of the driving claw 7 and the driving part 51.
As a modified embodiment, the linkage structure includes a connecting rod 12, an arc-shaped rail 13, a first pin 14 and a second pin 15, one end of the connecting rod 12 is hinged to the driving rod 5 through the first pin 14, the other end of the connecting rod is hinged to the jaw 2 through the second pin 15, the second pin 15 is slidably disposed in the rail 13, so that when the driving rod 5 moves, the end of the driving jaw 2 and the end of the connecting rod 12 move along the rail 13 along with the second pin 15, a furling section is disposed on the rail 13, and when the second pin 15 is in the furling section, the jaws 2 are furled in each other.
An operator rotates the threaded sleeve 4 to drive the driving rod 5 to rotate and move towards the clamping jaw 2 at the same time, and drives the connecting rod 12 and the driving jaw 7 to swing along the track 13, so that the driving jaws 7 are gathered together to clamp a nail. When the operating personnel rotates the threaded sleeve 4 reversely, the clamping jaws 2 can be driven to be separated from each other, so that the operating personnel can operate conveniently. In this embodiment, adopt the setting of connecting rod 12 and arc track 13, transmit jack catch 2 with the kinetic energy of actuating lever 5, connecting rod 12 connects actuating lever 5 and jack catch 2, transmits the kinetic energy of actuating lever 5 in real time, makes the reaction of driving pawl 7 more sensitive.
As an improved specific embodiment, a locking mechanism for locking the barrel body 1 and the screw sleeve 4 is arranged on the driving rod 5, the locking mechanism comprises a locking rod 91, a rack 92, a sleeve 93, a spring 94 and a positioning ball 95, a mounting groove 96 is arranged on the driving rod 5, the locking rod 91 is hinged in the mounting groove 96, a first through hole 97 is arranged on the screw sleeve 4, one end of the locking rod 91 extends into the mounting groove 96, the other end of the locking rod extends out of the first through hole 97 to form a toggle part 98 for being toggled by a person, a second through hole 99 is arranged on the side wall of the mounting groove 96, the rack 92 is fixed at one end of the locking rod 91, which is opposite to the toggle part 98, and extends out of the second through hole 99, a locking tooth 90 is arranged in the barrel body 1, the sleeve 93 is fixed at one side of the rack 92, which is opposite to the locking rod 91, the spring 94, one end of the spring 94 abuts against the locking lever 91 and the other end abuts against the detent ball 95 to urge the detent ball 95 against the detent 16, and when the locking lever 91 swings, the detent ball 95 shifts between two lower positions of the detent 16, thereby engaging or disengaging the rack 92 with or from the locking tooth 90.
When the turnbuckle 4 is rotated, an operator dials the dial part 98 to separate the rack 92 from the locking teeth 90, then the turnbuckle 4 is rotated to drive the driving rod 5 to move the driving rod 5 toward the claw 2, after the claw 2 clamps the bolt, the operator dials the dial part 98 to swing the locking rod 91 to drive the positioning ball 95 to move along the positioning slot 16, after the positioning ball 95 passes through a middle high position, the spring 94 pushes the positioning ball 95 to slide toward the other low position of the positioning slot 16 to push the rack 92 and the locking rod 91 to swing rapidly, the driving rack 92 is meshed with the locking teeth 90 to lock the driving rod 5 and the barrel body 1, the connecting force between the barrel body 1 and the driving rod 5 is increased, and therefore when the bolt is pulled out, the barrel body 1 is prevented from being separated from the turnbuckle 4 due to thread failure.
As a modified specific implementation mode, one surface of the clamping jaws 2 facing the drawing direction is provided with a plurality of fixed teeth 8.
When the clamping jaw 2 is folded, the fixing teeth 8 clamp the screw, so that the clamping force of the clamping jaw 2 to the screw is increased, and the clamping jaw 2 clamps the screw more firmly.
As a modified specific embodiment, an elastic isolating membrane 9 for closing the opening 3 is arranged at the position of the plurality of openings 3, and the plurality of clamping jaws 2 penetrate through the isolating membrane 9 and are in sealing connection with the isolating membrane 9 and extend out of the openings 3.
The individual components wear during operation, creating component debris that may cause infection if it falls onto the wound, and the barrier membrane 9 is positioned to catch the falling debris and prevent it from falling onto the wound.
As an improved specific implementation mode, the barrel-shaped protective sleeve further comprises a protective sleeve 10 used for protecting the clamping jaw 2, the protective sleeve 10 is barrel-shaped, a thread groove is formed in the inner ring wall of the protective sleeve 10, and the thread groove is in threaded connection with the external thread on the barrel body 1 to fix the protective sleeve 10 on the barrel body 1.
When not using, on fixing staving 1 with protective sheath 10, prevent that jack catch 2 from receiving the foreign object and colliding with, protective sheath 10 is through threaded connection on the staving, easy dismounting.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. The utility model provides a disconnected nail of screw is got nail device which characterized in that: comprises a barrel body (1), a plurality of clamping jaws (2) and a driving component for driving the clamping jaws (2) to be mutually folded, wherein the bottom surface of the barrel body (1) is provided with a plurality of openings (3), the plurality of clamping jaws (2) are hinged in the barrel body (1) and respectively extend out of the plurality of openings (3), the driving component comprises a threaded sleeve (4) and a driving rod (5) coaxially fixed in the threaded sleeve (4), the driving rod (5) is arranged in the barrel body (1), an inner ring wall of the threaded sleeve (4) is provided with an inner thread, an outer ring wall of the barrel body (1) is provided with an outer thread, the inner thread is in threaded connection with the outer thread, so that when the barrel body (1) and the threaded sleeve (4) relatively rotate, the driving rod (5) is driven to axially move along the barrel body (1), one end of the driving rod (5) back to the threaded sleeve (4) is provided with a linkage structure for enabling the driving clamping jaws (2) to be linked with the, when the driving rod (5) moves towards the clamping jaws (2), the linkage structure drives the clamping jaws (2) to be mutually furled so as to clamp screws, the linkage structure comprises driving claws (7) the quantity of which is the same as that of the clamping jaws (2), the diameter of one end, back to the screw sleeve (4), of the driving rod (5) is gradually reduced to form a driving inclined plane (6), the driving claws (7) are correspondingly bent and connected with the clamping jaws (2) one by one to form a pushing opening for the end part, back to the screw sleeve (4), of the driving rod to stretch into, when the driving rod (5) moves towards the clamping jaws (2), the driving inclined plane (6) enters the pushing opening to be attached to a plurality of driving claws (7) and pushes the driving claws (7) to turn outwards so as to drive the clamping jaws (2) to be furled, the linkage structure comprises a connecting rod (12), an arc-shaped track (13), a first pin shaft (14) and, one end of the connecting rod (12) is hinged to the driving rod (5) through a first pin shaft (14), the other end of the connecting rod is hinged to the clamping jaw (2) through a second pin shaft (15), the second pin shaft (15) is arranged in the track (13) in a sliding mode, when the driving rod (5) moves, the end portion of the clamping jaw (2) and the end portion of the connecting rod (12) move along the track (13) along with the second pin shaft (15), a furling section is arranged on the track (13), and when the second pin shaft (15) is in the furling section, the clamping jaws (2) are furled in each other.
2. The broken screw nail extracting device according to claim 1, characterized in that: the driving rod (5) comprises a driving portion (51) and a connecting portion (52), the diameter of the driving portion (51) is larger than that of the connecting portion (52), one end of the connecting portion (52) is coaxially fixed with the thread sleeve (4), the other end of the connecting portion is coaxially fixed with the driving portion (51), and the driving inclined surface (6) is arranged on the driving portion (51).
3. The screw broken nail taking device according to claim 2, characterized in that: the driving part (51) is rotatably arranged on the connecting part (52), the driving inclined plane (6) is provided with a limiting groove (11) matched with the driving claw (7), and when the driving rod (5) is contacted with the driving claw (7), the driving claw (7) slides into the limiting groove (11) to prevent the driving part (51) from rotating.
4. The broken screw nail extracting device according to claim 3, characterized in that: the barrel body is characterized in that a locking mechanism used for locking the barrel body (1) and the threaded sleeve (4) is arranged on the driving rod (5), the locking mechanism comprises a locking rod (91), a rack (92), a sleeve (93), a spring (94) and a positioning ball (95), a mounting groove (96) is formed in the driving rod (5), the locking rod (91) is hinged in the mounting groove (96), a first through hole (97) is formed in the threaded sleeve (4), one end of the locking rod (91) extends into the mounting groove (96), the other end of the locking rod extends out of the first through hole (97) to form a shifting part (98) for shifting by a person, a second through hole (99) is formed in the side wall of the mounting groove (96), the rack (92) is fixed at one end of the locking rod (91) back to the shifting part (98) and extends out of the second through hole (99), and locking teeth (90) are arranged, the sleeve (93) is fixed on one side, back to the locking rod (91), of the rack (92), the spring (94) and the positioning ball (95) are arranged in the sleeve (93), the W-shaped positioning groove (16) is formed in the bottom of the mounting groove (96), one end of the spring (94) abuts against the locking rod (91), the other end of the spring abuts against the positioning ball (95), the positioning ball (95) is pushed to abut against the positioning groove (16), and when the locking rod (91) swings, the positioning ball (95) is shifted between two lower positions of the positioning groove (16), so that the rack (92) is meshed with or separated from the locking teeth (90).
5. The screw broken nail taking device according to claim 4, characterized in that: one surface of the clamping jaws (2) facing the furling direction is provided with a plurality of fixed teeth (8).
6. The screw broken nail taking device according to claim 5, characterized in that: a plurality of opening (3) department is provided with elasticity barrier film (9) that are used for closed opening (3), a plurality of jack catch (2) pass barrier film (9) and with barrier film (9) sealing connection, stretch out outside opening (3).
7. The screw broken nail taking device according to claim 6, characterized in that: still including protective sheath (10) that are used for protecting jack catch (2), protective sheath (10) are the tubbiness, be provided with the thread groove on the interior rampart of protective sheath (10), the thread groove is connected with the external screw thread on staving (1), fixes protective sheath (10) on staving (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710711027.5A CN107374718B (en) | 2017-08-17 | 2017-08-17 | Broken screw taking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710711027.5A CN107374718B (en) | 2017-08-17 | 2017-08-17 | Broken screw taking device |
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| Publication Number | Publication Date |
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| CN107374718A CN107374718A (en) | 2017-11-24 |
| CN107374718B true CN107374718B (en) | 2019-12-20 |
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| CN201710711027.5A Active CN107374718B (en) | 2017-08-17 | 2017-08-17 | Broken screw taking device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109051507B (en) * | 2018-08-29 | 2024-03-12 | 安徽泽众安全科技有限公司 | Underwater intelligent ball throwing device |
| CN109392441A (en) * | 2018-12-04 | 2019-03-01 | 洛阳智能农业装备研究院有限公司 | A kind of pepper picking mechanism |
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| CN208892757U (en) * | 2017-08-17 | 2019-05-24 | 温州市人民医院 | A kind of screw broken nail device for fetching nail |
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| CN201609405U (en) * | 2010-03-08 | 2010-10-20 | 于其龙 | Needle withdrawing device |
| CN203263522U (en) * | 2013-06-05 | 2013-11-06 | 郝惠南 | Novel bone needle extractor |
| CN203861338U (en) * | 2014-05-30 | 2014-10-08 | 张庆文 | Vertebral pedicle broken nail extractor |
| EP3288473B1 (en) * | 2015-04-30 | 2022-12-28 | K2M, Inc. | Rod reducer |
| CN204839723U (en) * | 2015-07-13 | 2015-12-09 | 赵全明 | Orthopaedic nail removing device |
| CN105997230B (en) * | 2016-05-03 | 2018-04-10 | 季振涛 | It is easy to take out the orthopedic nail extractor of broken nail |
| CN106037925A (en) * | 2016-06-03 | 2016-10-26 | 烟台南山学院 | Trephine broken screw extractor |
| CN106073886B (en) * | 2016-07-13 | 2019-09-27 | 苏州苏南捷迈得医疗器械有限公司 | A kind of orthopedic broken screw nail-fetching device |
| CN206303967U (en) * | 2016-09-23 | 2017-07-07 | 张毅 | A kind of operation nail-fetching device for orthopaedic medical treatment |
| CN106821488B (en) * | 2017-04-07 | 2023-08-11 | 中国人民解放军总医院 | Auxiliary sleeve for screw fixation and taking out |
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- 2017-08-17 CN CN201710711027.5A patent/CN107374718B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208892757U (en) * | 2017-08-17 | 2019-05-24 | 温州市人民医院 | A kind of screw broken nail device for fetching nail |
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