CN114917009B - Full-thread lag screw with enhanced mechanics - Google Patents
Full-thread lag screw with enhanced mechanics Download PDFInfo
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- CN114917009B CN114917009B CN202210515597.8A CN202210515597A CN114917009B CN 114917009 B CN114917009 B CN 114917009B CN 202210515597 A CN202210515597 A CN 202210515597A CN 114917009 B CN114917009 B CN 114917009B
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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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
-
- 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/869—Pins or screws or threaded wires; nuts therefor characterised by an open form, e.g. wire helix
-
- 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
-
- 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
Abstract
The invention provides a full-thread lag screw with enhanced mechanics, belonging to the field of medical instruments; including first screw, the outside cover of first screw is equipped with first elastic ring, a plurality of first spacing grooves have been seted up in the outside of first elastic ring, the inner wall of first spacing groove is provided with a plurality of lugs, and is a plurality of equal joint of first spacing inslot has the second elastic ring. According to the invention, the second screw, the second connecting rod, the sliding ring, the first elastic ring and the like are arranged, so that medical personnel can conveniently increase the screwing depth of the first screw into the bone or take out the first screw, and simultaneously, the pretightening force of the first elastic ring on the first screw can be reduced, the torque required by the medical personnel for disassembling the first screw is reduced, the difficulty of taking out the screw by the medical personnel is reduced, the operation efficiency of the medical personnel is improved, the holding force of the first screw is enhanced by adopting the first elastic ring, the observation by the medical personnel is facilitated, the operation is convenient and fast, and the operation efficiency of the medical personnel is further improved.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a full-thread lag screw with enhanced mechanics.
Background
At present, an internal fixing device for fixing a fracture part is used independently or combined with a bone fracture plate, wherein cancellous screws, cortical screws, bone bolts, hollow screws and the like are commonly used, a common bone screw consists of a threaded screw rod with threads and a screw head with an inner hexagonal head at the head, and the structure of the common bone screw is the same as that of a common screw.
The utility model discloses a high power of controlling bone screw that CN104546106B provided, including bone screw and expansion screw, the screw point and the screw rod of bone screw are the form of separating, be equipped with the through-hole of handstand taper shape in the screw rod, be equipped with the internal thread on the through-hole wall, be equipped with the downward expansion tank of opening on the screw rod, the corresponding both sides in screw rod bottom are equipped with the dovetail type connector respectively, the screw point up end center department corresponding with the screw rod lower extreme is equipped with circular recess, be equipped with the carousel in the circular recess, be equipped with an arc groove on the screw point wall that the carousel corresponds, be equipped with the dovetail type spread groove on the circular recess wall, the screw rod is connected with the screw point through dovetail type connector and dovetail type spread groove, have the high difficult not hard up and can prevent advantages such as secondary damage of controlling.
But this bone screw passes through the fixed needle reinforcing screw of arc of screw rod inflation and screw point portion in patient's bone and controls power, and the screw rod easily takes place irreversible plastic deformation after long-time inflation, medical personnel's the degree of difficulty of taking out the screw has been increased, medical personnel's operation efficiency has been reduced, adopt the fixed needle of arc to increase the stability that the power was controlled to the screw simultaneously and hang down, the medical personnel of being not convenient for observe, the operation is inconvenient, medical personnel's operation efficiency has further been reduced, therefore, this application provides a full-thread lag screw of mechanics reinforcing and satisfies the demand.
Disclosure of Invention
The invention aims to solve the technical problems that a screw rod is easy to generate irreversible plastic deformation after being expanded for a long time, the difficulty of taking out a screw by medical personnel is increased, the operation efficiency of the medical personnel is reduced, and meanwhile, the stability of increasing the holding force of the screw by adopting an arc-shaped fixing needle is low, so that the screw is inconvenient to observe by the medical personnel and the operation is inconvenient.
In order to solve the technical problems, the invention provides the following technical scheme:
a full-thread lag screw with enhanced mechanics comprises a first screw, wherein a first elastic ring is sleeved on the outer side of the first screw, a plurality of first limiting grooves are formed in the outer side of the first elastic ring, a plurality of convex blocks are arranged on the inner wall of each first limiting groove, a second elastic ring is clamped in each first limiting groove, a first weakening groove is formed in the inner wall of each first elastic ring, and a reinforcing block is arranged on the inner wall of each first weakening groove; the first screw is internally provided with a tensioning component connected with the first elastic ring, the tensioning component is used for pulling the inner wall of the first elastic ring to be contracted or expanded, the rigidity of the first elastic ring is increased when the first elastic ring is contracted, and the stroke of the first screw is increased when the first elastic ring is expanded.
Preferably, the bottom of first spacing groove is that annular evenly distributed has a plurality of spacing jack catchs, and is a plurality of the equal fixed mounting in bottom of spacing jack catch has a plurality of strengthening ribs, the strengthening rib with first elastic ring fixed connection, the one end of spacing jack catch is the arc, the inner wall of first spacing groove is about the central plane symmetry of first spacing groove is provided with a plurality of lugs.
Preferably, a screwdriver jack has been seted up at the top of first screw, first guiding groove has been seted up to the bottom of screwdriver jack, the thread groove has been seted up to the bottom of first guiding groove, the inner wall of thread groove about two first through-holes have been seted up to the axis symmetry of thread groove, the equal fixed mounting in top of first through-hole has the connection piece, the bottom fixed mounting of connection piece has the briquetting, first spacing hole has been seted up to one side of briquetting, the outside of first screw about the abdicating groove has been seted up to the axis symmetry of first screw.
Preferably, the tensioning part comprises a second screw connected with the thread groove through a thread, a first limiting block is fixedly mounted at the bottom of the second screw, a connecting sleeve is connected to one end of the first limiting block in a rotating mode in a sleeved mode, two groups of first connecting rods are connected to one side of the connecting sleeve in a rotating mode, each group of first connecting rods is provided with two first connecting rods, one end of each first connecting rod is connected with the same pressing block in a rotating mode, a second connecting rod is connected to the inner side of the first limiting hole in a rotating mode in a sleeved mode, the outer side of each first screw is connected with the sliding ring in a sliding mode in a sleeved mode, an annular sliding groove is formed in the top of the sliding ring, and one end of each second connecting rod is connected with the annular sliding groove in a sliding mode.
Preferably, the connecting sheet is an elastic metal sheet, and a movable groove is formed in the bottom of the first limiting hole.
Preferably, the rod part of the second connecting rod is connected with the movable groove in a sliding manner, a ball head is fixedly mounted at one end of the second connecting rod, and the second connecting rod is connected with the annular sliding groove through the ball head.
Preferably, the nut portion of the second screw is located in the first guide groove, and the screwdriver insertion hole is a hexagon socket.
Preferably, the outer side of the slip ring is integrally vulcanized with the bottom of the first elastic ring, and the top of the first elastic ring is abutted with the nut of the first screw.
Compared with the prior art, the technical scheme of the invention at least has the following beneficial effects:
in the scheme, by arranging the second screw, the second connecting rod, the sliding ring, the first elastic ring and the like, when the first screw is screwed into the bone of a patient, the first elastic ring is further supported by the tensioning part to enhance the rigidity of the sliding ring, and the deformation of the sliding ring is further reduced, so that the pretightening force provided by the first elastic ring to the first screw is improved;
by arranging the first screw, the first elastic ring, the first limit groove and the second elastic ring, when medical personnel screws the first screw into the bone of a patient, the bottom of the first elastic ring is abutted against the surface of the bone, meanwhile, the top of the first elastic ring is abutted against the bottom of a nut of the first screw, the first screw screwed into the bone of the patient is prevented from loosening through the pretightening force provided by the first elastic ring, the holding force of the first screw on the bone of the patient is enhanced, the first limit groove is limited by the second elastic ring, the first elastic ring is prevented from expanding outwards after being stressed, the rigidity of the first elastic ring is enhanced, the pretightening force of the first elastic ring on the first screw is further improved, the looseness prevention of the first screw is further guaranteed, and the use safety of the first screw is improved;
through setting up first elastic ring, first spacing groove, spacing jack catch, lug and second elastic ring, frictional force through the first spacing inslot wall of lug reinforcing, when first elastic ring atress warp, first spacing groove can extrude the second elastic ring, frictional force through the lug increase second elastic ring, carry on spacingly to the second elastic ring through spacing jack catch, so that when medical personnel take out this device, the joint takes place to break away from at the second elastic ring of first spacing inslot and first elastic ring, the safety in utilization of this device has further been improved.
Drawings
FIG. 1 is a schematic view of a three-dimensional structure of a mechanically enhanced full-thread lag screw;
FIG. 2 is a schematic view of the mechanically enhanced full-thread lag screw with the second elastic ring removed;
FIG. 3 is a schematic perspective view of a first elastic ring;
FIG. 4 is a schematic view of a cross-sectional three-dimensional structure of a mechanically enhanced full-thread lag screw with a second elastic ring removed;
FIG. 5 is an enlarged perspective view of the structure at A in FIG. 4;
FIG. 6 is a cross-sectional perspective view of a first screw;
fig. 7 is a schematic perspective view of the enlarged structure B in fig. 6.
[ reference numerals ]
1. A first screw; 2. a screwdriver jack; 3. a first guide groove; 4. a thread groove; 5. a first through hole; 6. briquetting; 7. a first limit hole; 8. a yielding groove; 9. a second screw; 10. a first stopper; 11. connecting sleeves; 12. a first connecting rod; 13. a second connecting rod; 14. a slip ring; 15. a first elastic ring; 16. a first weakening tank; 17. a reinforcing block; 18. connecting sheets; 19. a first limit groove; 20. a limiting clamping jaw; 21. reinforcing ribs; 22. a bump; 23. a second elastic ring.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 2, 3 and 5, an embodiment of the present invention provides a mechanically enhanced full-thread lag screw, including a first screw 1, wherein a first elastic ring 15 is sleeved outside the first screw 1, a plurality of first limiting grooves 19 are formed outside the first elastic ring 15, a plurality of protrusions 22 are formed on an inner wall of each first limiting groove 19, a second elastic ring 23 is clamped in each first limiting groove 19, a first weakening groove 16 is formed on an inner wall of the first elastic ring 15, a reinforcing block 17 is formed on an inner wall of each first weakening groove 16, and a top of the first elastic ring 15 abuts against a nut of the first screw 1; the first screw 1 is internally provided with a tensioning component connected with the first elastic ring 15, the tensioning component is used for pulling the inner wall of the first elastic ring 15 to contract inwards or expand outwards, the rigidity of the first elastic ring 15 is increased when the first elastic ring 15 contracts inwards, and the stroke of the first screw 1 is increased when the first elastic ring 15 expands outwards.
When medical personnel are with first screw 1 screw in patient's bone in, the bottom and the bone surface of first elastic ring 15 are contradicted, the top of first elastic ring 15 is contradicted the nut bottom of first screw 1 simultaneously, pretightning force through first elastic ring 15 provides, prevent that first screw 1 in the screw in patient's bone from loosening and taking off, and strengthen first screw 1 and to the power of holding of patient's bone, restrict first spacing groove 19 through second elastic ring 23, avoid first elastic ring 15 to expand outward after the atress, the rigidity of first elastic ring 15 has been strengthened, further improve the pretightning force of first elastic ring 15 to first screw 1, and take off the prevention of first screw 1 and provide further guarantee, the safety in utilization of first screw 1 has been improved.
As shown in fig. 1, fig. 3 and fig. 5, a plurality of limiting claws 20 are uniformly distributed in an annular shape at the bottom of the first limiting groove 19, a plurality of reinforcing ribs 21 are fixedly mounted at the bottoms of the limiting claws 20, the reinforcing ribs 21 are fixedly connected with the first elastic ring 15, one end of each limiting claw 20 is arc-shaped, a plurality of convex blocks 22 are symmetrically arranged on the inner wall of the first limiting groove 19 relative to the central plane of the first limiting groove 19, the friction force of the inner wall of the first limiting groove 19 is enhanced by the convex blocks 22, when the first elastic ring 15 is deformed due to stress, the second elastic ring 23 can be extruded by the first limiting groove 19, the friction force of the second elastic ring 23 is enhanced by the convex blocks 22, the second elastic ring 23 is limited by the limiting claws 20, so that when medical personnel take out the device, the second elastic ring 23 clamped in the first limiting groove 19 is separated from the first elastic ring 15, and the use safety of the device is further improved.
As shown in fig. 5 to 7, a screwdriver jack 2 is formed at the top of a first screw 1, a first guide groove 3 is formed at the bottom of the screwdriver jack 2, a thread groove 4 is formed at the bottom of the first guide groove 3, two first through holes 5 are symmetrically formed on the inner wall of the thread groove 4 with respect to the axis of the thread groove 4, connecting pieces 18 are fixedly mounted at the tops of the first through holes 5, a pressing block 6 is fixedly mounted at the bottom of the connecting piece 18, a first limiting hole 7 is formed at one side of the pressing block 6, a receding groove 8 is symmetrically formed at the outer side of the first screw 1 with respect to the axis of the first screw 1, a tensioning part comprises a second screw 9 in threaded connection with the thread groove 4, a first limiting block 10 is fixedly mounted at the bottom of the second screw 9, a connecting sleeve 11 is rotatably sleeved at one end of the first limiting block 10, two sets of first connecting rods 12 are rotatably sleeved at one side of the connecting sleeve 11, each group of first connecting rods 12 is provided with two first connecting rods 12, one end of each group of first connecting rods 12 is rotatably connected with the same pressing block 6, the inner side of the first limiting hole 7 is rotatably sleeved with a second connecting rod 13, under normal state, a abdicating groove 8 is positioned in the second connecting rod 13, the support strength of the second connecting rod 13 is increased through the support of the abdicating groove 8 to the second connecting rod 13, the outer side of the first screw 1 is slidably sleeved with a slip ring 14, the top of the slip ring 14 is provided with an annular sliding groove, one end of the second connecting rod 13 is slidably connected with the annular sliding groove, the connecting sheet 18 is an elastic metal sheet, the bottom of the first limiting hole 7 is provided with a movable groove, the rod part of the second connecting rod 13 is slidably connected with the movable groove, the pressing block 6 drives the second connecting rod 13 to move through the first limiting hole 7, one end of the second connecting rod 13 is fixedly provided with a ball head, the second connecting rod 13 is connected with the annular sliding groove through the ball head, the outside of sliding ring 14 and the bottom of first elastic ring 15 are vulcanized integratively, drive sliding ring 14 synchronous revolution through second connecting rod 13 when preventing that first screw 1 from rotating, when avoiding medical personnel to screw in first screw 1 bone, first elastic ring 15 takes place to twist reverse, influences first elastic ring 15's normal use.
When the first screw 1 is screwed into the bone of a patient, the first elastic ring 15 is further supported by the tensioning part to enhance the rigidity of the sliding ring 14, and further reduce the deformation of the sliding ring 14, so that the pre-tightening force provided by the first elastic ring 15 to the first screw 1 is improved, when the screwing depth of the first screw 1 into the bone needs to be increased or the first screw 1 needs to be taken out, the second screw 9 is rotated by a screwdriver, the second screw 9 drives the sliding ring 14 to move through the first limiting block 10, the connecting sleeve 11, the first connecting rod 12, the pressing block 6 and the second connecting rod 13, the sliding ring 14 moves to contract the length of the first elastic ring 15, so that medical staff can increase the screwing depth of the first screw 1 into the bone or take out the first screw 1, meanwhile, the pre-tightening force provided by the first elastic ring 15 to the first screw 1 can be reduced by the mode, the torque required for the medical staff to disassemble the first screw 1 is reduced, the difficulty of the medical staff in taking out the screw is reduced, the screw is improved, the operating efficiency of the medical staff is improved, and the operating efficiency of the medical staff is further improved.
As shown in fig. 6, the nut portion of second screw 9 is located first guiding groove 3, and screwdriver jack 2 is interior hexagonal hole, is convenient for medical personnel to operate first guiding groove 3 through screwdriver jack 2 communicating with first guiding groove 3, has avoided second screw 9 to cause the interference to the screwdriver of pegging graft with screwdriver jack 2 simultaneously, and is rational in infrastructure, facilitates the use.
According to the technical scheme provided by the invention, by arranging the first screw, the first elastic ring, the first limit groove and the second elastic ring, when medical personnel screws the first screw into the bone of a patient, the bottom of the first elastic ring is abutted against the surface of the bone, meanwhile, the top of the first elastic ring is abutted against the bottom of the nut of the first screw, the first screw screwed into the bone of the patient is prevented from loosening through the pretightening force provided by the first elastic ring, the holding force of the first screw on the bone of the patient is enhanced, the first limit groove is limited by the second elastic ring, the first elastic ring is prevented from expanding outwards after being stressed, the rigidity of the first elastic ring is enhanced, the pretightening force of the first screw by the first elastic ring is further improved, the looseness prevention of the first screw is further guaranteed, and the use safety of the first screw is improved;
the friction force of the inner wall of the first limiting groove is enhanced through the lug by arranging the first elastic ring, the first limiting groove, the limiting clamping jaw, the lug and the second elastic ring, when the first elastic ring is deformed under stress, the first limiting groove can extrude the second elastic ring, the friction force of the second elastic ring is increased through the lug, and the second elastic ring is limited through the limiting clamping jaw, so that when medical personnel take out the device, the second elastic ring clamped in the first limiting groove is separated from the first elastic ring, and the use safety of the device is further improved;
through setting up the second screw, the second connecting rod, sliding ring and first elastic ring etc. when first screw in patient's bone, provide further support to first elastic ring through with taut part, with the rigidity of reinforcing sliding ring, further reduce the deflection of sliding ring, thereby improve the pretightning force that first elastic ring provided first screw, when needs increase the degree of depth of first screw in bone or take out first screw, rotate the second screw through the screwdriver, the second screw passes through first stopper, the adapter sleeve, the head rod, the briquetting, the second connecting rod drives the sliding ring and removes, the sliding ring removes makes first elastic ring length shrink, so that medical personnel increase the degree of depth of first screw in bone or take out first screw, still can reduce the pretightning force that first elastic ring provided first screw simultaneously through this mode, reduce medical personnel and dismantle the required moment of torsion of first screw, medical personnel's the degree of difficulty that medical personnel took out the screw has been reduced, medical personnel's operation efficiency has been improved, and the control power of first elastic ring reinforcing first screw is convenient, and convenient for medical personnel observe, and operation efficiency has further improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.
Claims (8)
1. A mechanically enhanced full thread lag screw, comprising:
the outer side of the first screw is sleeved with a first elastic ring, a plurality of first limiting grooves are formed in the outer side of the first elastic ring, a plurality of protruding blocks are arranged on the inner wall of each first limiting groove, a second elastic ring is clamped in each first limiting groove, a first weakening groove is formed in the inner wall of each first elastic ring, and reinforcing blocks are arranged on the inner wall of each first weakening groove;
the first screw is internally provided with a tensioning component connected with the first elastic ring, the tensioning component is used for pulling the inner wall of the first elastic ring to be contracted or expanded, the rigidity of the first elastic ring is increased when the first elastic ring is contracted, and the stroke of the first screw is increased when the first elastic ring is expanded.
2. The mechanically reinforced full-thread lag screw of claim 1, wherein a plurality of limiting claws are uniformly distributed at the bottom of the first limiting groove in an annular shape, a plurality of reinforcing ribs are fixedly mounted at the bottoms of the limiting claws, the reinforcing ribs are fixedly connected with the first elastic ring, one end of each limiting claw is in an arc shape, and a plurality of convex blocks are symmetrically arranged on the inner wall of the first limiting groove relative to the central plane of the first limiting groove.
3. The mechanically-reinforced full-thread lag screw of claim 1, wherein a screwdriver jack is formed at the top of the first screw, a first guide groove is formed at the bottom of the screwdriver jack, a thread groove is formed at the bottom of the first guide groove, two first through holes are symmetrically formed in the inner wall of the thread groove relative to the axis of the thread groove, connecting pieces are fixedly mounted at the tops of the first through holes, pressing blocks are fixedly mounted at the bottoms of the connecting pieces, a first limiting hole is formed in one side of each pressing block, and abdicating grooves are symmetrically formed in the outer side of the first screw relative to the axis of the first screw.
4. The mechanically reinforced full-thread lag screw of claim 3, wherein the tightening member comprises a second screw in threaded connection with the thread groove, a first limiting block is fixedly mounted at the bottom of the second screw, a connecting sleeve is rotatably sleeved at one end of the first limiting block, two groups of first connecting rods are rotatably sleeved at one side of the connecting sleeve, each group of first connecting rods comprises two first connecting rods, one end of each group of first connecting rods is rotatably connected with the same pressing block, a second connecting rod is rotatably sleeved at the inner side of the first limiting hole, the outer side of the first screw is slidably sleeved with a sliding ring, an annular sliding groove is formed in the top of the sliding ring, and one end of the second connecting rod is slidably connected with the annular sliding groove.
5. The mechanically reinforced full-thread lag screw of claim 3, wherein the connecting sheet is an elastic metal sheet, and a movable groove is formed at the bottom of the first limiting hole.
6. The mechanically enhanced full-thread lag screw of claim 4, wherein the rod portion of the second connecting rod is slidably connected with the movable groove, a ball head is fixedly mounted at one end of the second connecting rod, and the second connecting rod is connected with the annular sliding groove through the ball head.
7. The mechanically enhanced full thread lag screw of claim 4, wherein the cap portion of the second screw is positioned within the first guide slot, and the driver socket is a hex socket.
8. The mechanically enhanced full thread lag screw of claim 4, wherein an outer side of the slip ring is integrally vulcanized with a bottom portion of the first resilient ring, and a top portion of the first resilient ring abuts against a nut of the first screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210515597.8A CN114917009B (en) | 2022-05-12 | 2022-05-12 | Full-thread lag screw with enhanced mechanics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210515597.8A CN114917009B (en) | 2022-05-12 | 2022-05-12 | Full-thread lag screw with enhanced mechanics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114917009A CN114917009A (en) | 2022-08-19 |
| CN114917009B true CN114917009B (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210515597.8A Active CN114917009B (en) | 2022-05-12 | 2022-05-12 | Full-thread lag screw with enhanced mechanics |
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| Country | Link |
|---|---|
| CN (1) | CN114917009B (en) |
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|---|---|---|---|---|
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| CN103349565A (en) * | 2013-06-25 | 2013-10-16 | 建湖县人民医院 | Thread type lag screw system and special compound opener thereof |
| CN104546106A (en) * | 2015-01-26 | 2015-04-29 | 山东省文登整骨医院 | High-hold bone screw |
| CN105078553A (en) * | 2015-09-07 | 2015-11-25 | 北京市富乐科技开发有限公司 | Femur neck side hole drainage pressure reducing hollow tension screw system |
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| CN114145833A (en) * | 2021-12-31 | 2022-03-08 | 航天中心医院 | Detachable screw and internal fixing device for fixing front ring of pelvic fracture |
| CN114176749A (en) * | 2021-12-03 | 2022-03-15 | 新里程安钢总医院 | Anti-pulling percutaneous pedicle screw |
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| CN111821008A (en) * | 2020-08-08 | 2020-10-27 | 张燕 | Bone nail containing bone inducing material coating and spine fixing device |
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| CN114145833A (en) * | 2021-12-31 | 2022-03-08 | 航天中心医院 | Detachable screw and internal fixing device for fixing front ring of pelvic fracture |
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| CN114917009A (en) | 2022-08-19 |
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