CN220988898U - Blade type lag screw driver - Google Patents
Blade type lag screw driver Download PDFInfo
- Publication number
- CN220988898U CN220988898U CN202322189360.8U CN202322189360U CN220988898U CN 220988898 U CN220988898 U CN 220988898U CN 202322189360 U CN202322189360 U CN 202322189360U CN 220988898 U CN220988898 U CN 220988898U
- Authority
- CN
- China
- Prior art keywords
- lag screw
- pole
- driving
- guide
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011324 bead Substances 0.000 claims description 11
- 210000000689 upper leg Anatomy 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000002513 implantation Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000002436 femur neck Anatomy 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model relates to a blade type lag screw driver, which has the innovation points that: including driving into the pole, with the core bar of lag screw cooperation connection to and the guide sleeve who is connected with aim handle cooperation, it is hollow structure to drive into the pole, and drives into the afterbody periphery of pole and be equipped with the handle, the core bar is established and is shaft hole cooperation rather than driving into the pole, and the head of core bar exposes and is driving into the outside of pole, and the afterbody of core bar is located the inside of driving into the pole, guide sleeve establishes and drives into the periphery of pole and guide sleeve and drives into the pole direction cooperation. The utility model avoids the direct bearing of the core rod on the knocking force and reduces the risk of breakage of the core rod.
Description
Technical Field
The utility model relates to an beater, in particular to a blade type lag screw beater.
Background
When the blade type lag screw is arranged in the intramedullary nail operation process, the driver is firstly used for connecting the blade type lag screw, and then the bone hammer is used for knocking the tail of the driver until the lag screw is knocked to a proper position of a femoral neck, in order to increase the binding force between the blade type lag screw and bone, the bone is filled by adopting the extrusion of the lag screw, and the bone is difficult to knock in the implantation process, so that the strength challenge of the driver is relatively large.
The current driver structure in the market generally adopts the design that a core rod is inserted into an outer sleeve, the front end part of the core rod adopts a hollow thin-wall design, the rear end part adopts a wide cap head design, the design is also convenient for a bone hammer to directly strike the outer end face of the cap head, and the front end part and the rear end part of the core rod exceed the outer sleeve. In the use process, the front end face of the outer sleeve props against the tail of the lag screw, the front end part of the core rod is in threaded connection with the lag screw, the inner side plane of the cap head of the rear end part of the core rod props against the rear end face of the outer sleeve after screwing, so that the core rod is in a hollow structure, the core rod in the prior art is in a screwing state for being inserted along the aiming guide pin, the core rod is in a screwing state when knocking starts, the outer sleeve bears knocking force due to force transmission, the strength of the outer sleeve is relatively high, but in the knocking process, the possibility of loosening exists due to vibration and the connection with the lag screw, at the moment, the inner side plane of the cap head of the rear end part of the core rod is separated from the rear end face of the outer sleeve, the core rod is stressed by the core rod after knocking continuously, the core rod is in a thin-wall structure, and particularly, the head of the core rod is provided with threads, so that a stress concentration point of the core rod is formed, the breaking risk is relatively high, the core rod is easy to break at the root of the lag screw, the lag screw can be difficult or even can not be taken out, the operation risk is increased, and operation failure can be caused.
Disclosure of Invention
The purpose of the utility model is that: the blade type lag screw driver has the advantages that the core bar is prevented from bearing knocking force, and the breaking risk of the core bar is reduced.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: a blade type lag screw driver has the innovation points that: including driving into the pole, with the core bar of lag screw cooperation connection to and the guide sleeve who is connected with aim handle cooperation, it is hollow structure to drive into the pole, and drives into the afterbody periphery of pole and be equipped with the handle, the core bar is established and is shaft hole cooperation rather than driving into the pole, and the head of core bar exposes and is driving into the outside of pole, and the afterbody of core bar is located the inside of driving into the pole, guide sleeve establishes and drives into the periphery of pole and guide sleeve and drives into the pole direction cooperation.
In the technical scheme, the head of the core rod is provided with the thread section which is matched and connected with the lag screw, the tail of the core rod is provided with the hexagonal counter bore which is convenient to rotate in and out from the driving rod, and the thread section is exposed outside the driving rod.
In the technical scheme, the side wall of the tail part of the handle is provided with a threaded hole, a ball plunger which is detachably connected with the handle is arranged in the hole, and the ball plunger radially abuts against an anti-skid knurl arranged on the outer side of the tail profile of the core rod to prevent the core rod from loosening.
In the technical scheme, the head of the thread section of the core rod is provided with a limit boss formed by the thread section and the lag screw.
In the above technical scheme, a plurality of guide beads are arranged on the peripheral wall of the driving rod along the circumferential direction of the driving rod, a plurality of guide sliding grooves which are spirally arranged are arranged on the inner wall of the guide sleeve, and the guide beads are in sliding fit with the guide sliding grooves, so that the driving rod can rotate along the guide sliding grooves of the guide sleeve through the guide beads.
In the technical scheme, the head of the driving rod is provided with the axial positioning bulge matched with the lag screw notch in a positioning way.
In the technical scheme, the rod body of the driving rod is provided with the indication groove, the core rod is provided with the indication strip, and when the indication strip of the core rod corresponds to the indication groove of the driving rod, the correct position of the lag screw is conveniently indicated.
In the technical scheme, the guide sleeve comprises a sleeve section which is connected integrally or fixedly and is abutted against the femur, and a guide section which is matched and connected with the aiming handle, wherein a guide chute matched with the driving rod in a guiding manner is formed in the guide section.
In the above technical scheme, the head of the sleeve section is provided with a positioning part which is abutted with the femur.
The utility model has the positive effects that: after the blade type lag screw driver is adopted, as the blade type lag screw driver comprises the driving rod, the core rod which is matched and connected with the lag screw and the guide sleeve which is matched and connected with the aiming handle, the driving rod is of a hollow structure, the periphery of the tail part of the driving rod is provided with the handle, the core rod is arranged in the driving rod and is matched with the driving rod in a shaft hole, the head part of the core rod is exposed out of the driving rod, the tail part of the core rod is positioned in the driving rod, the guide sleeve is arranged on the periphery of the driving rod and is in guide fit with the driving rod,
When the tool is used, the end part of the driving rod is in positioning abutting connection with the blade type lag screw, then the blade type lag screw is matched and connected with the head part of the core rod, the guide sleeve is sleeved on the periphery of the driving rod, and the guide sleeve is detachably connected with the aiming handle.
Drawings
FIG. 1 is a schematic diagram of the structure of an embodiment of the present utility model;
FIG. 2 is a schematic illustration of the assembled connection of the driving rod and core rod of the present utility model;
FIG. 3 is a schematic view of the structure of FIG. 2 mated with a lag screw;
FIG. 4 is a schematic perspective view of a guide sleeve of the present utility model;
Fig. 5 is a schematic perspective view of the present utility model.
Detailed Description
The utility model is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.
As shown in fig. 1, 2, 3, 4 and 5, the blade type lag screw driver comprises a driving rod 1, a core rod 2 matched and connected with the lag screw and a guide sleeve 3 matched and connected with a sighting handle, wherein the driving rod 1 is of a hollow structure, the periphery of the tail part of the driving rod 1 is provided with the handle 4, the core rod 2 is arranged in the driving rod 1 and is matched with the driving rod 1 in a shaft hole, the head part of the core rod 2 is exposed out of the driving rod 1, the tail part of the core rod 2 is positioned in the driving rod 1, the tail end face of the core rod 2 is basically leveled with the tail end face of the driving rod 1, and the guide sleeve 3 is arranged on the periphery of the driving rod 1 and is matched with the driving rod 1 in a guide way.
As shown in fig. 2, in order to facilitate the threaded connection between the head of the core rod 2 and the lag screw and the screwing-in and unscrewing of the core rod 2 from the inside of the driving rod 1, the head of the core rod 2 is provided with a threaded section 21 cooperatively connected with the lag screw, the tail is provided with a hexagonal counter bore 22 which facilitates the screwing-in and unscrewing from the inside of the driving rod 1, and the threaded section 21 is exposed outside of the driving rod 1.
As shown in fig. 1, in order to prevent the core rod from falling out of the driving rod, a threaded hole is formed in the side wall of the tail of the handle 4, a ball plunger 5 detachably connected with the handle is arranged in the hole, and the ball plunger 5 radially abuts against an anti-skid knurling arranged on the outer side of the tail outline of the core rod 2 to prevent the core rod 2 from loosening. The anti-skid knurling arranged on the outer side of the tail outline of the core rod 2 can strengthen friction with the ball plunger 5, and further prevent the core rod 2 from loosening.
As shown in fig. 2, in order to achieve a fast positioning assembly of the lag screw core rod 2, the head of the threaded section 21 of the core rod 2 is provided with a limit boss 23 forming a limit with the lag screw.
As shown in fig. 1, 2 and 3, in order to prevent the imprecise implantation position of the head opening of the blade lag screw, the blade lag screw interferes with the femur to damage and sink the femur, a plurality of guide beads 11 are arranged on the peripheral wall of the driving rod 1 along the circumferential direction of the driving rod, a plurality of guide sliding grooves 31 which are spirally arranged are arranged on the inner wall of the guide sleeve 3, and the guide beads 11 are in sliding fit with the guide sliding grooves 31, so that the driving rod 1 rotates along the guide sliding grooves 31 of the guide sleeve 3 through the guide beads 11. When the blade type lag screw is used, if the head of the blade type lag screw needs to rotate to adjust the angle position of the notch, the guide bead 11 can slide along the guide chute 31 to carry out directional adjustment.
As shown in fig. 2, in order to limit the lag screw by the head of the driving rod and realize the abutting, the head of the driving rod 1 is provided with an axial positioning protrusion 12 which is matched with the gap of the lag screw in a positioning way.
Further, in order to shorten doctor's operating time, can effectively implant accurate direction fast, the pole body of driving into pole 1 is last to have the instruction groove, be equipped with the instruction strip on the core bar 1, works as the instruction strip of core bar 1 corresponds with the instruction groove of driving into pole 1, conveniently instructs lag screw to insert the exact position, can instruct the direction of inserting when doctor uses like this, reduces the time of inserting in the art.
As shown in fig. 4, in order to further improve the structural rationality and facilitate the operation and use, the guide sleeve 3 comprises a sleeve section 32 connected integrally or fixedly and abutted against the femur, and a guide section 33 connected in a matched manner with the aiming handle, and a guide chute 31 matched with the driving rod 1 in a guide manner is arranged in the guide section 33.
As shown in fig. 4, in order to ensure that the implantation path does not deviate during the process of implanting the screw, the guide sleeve is supported and positioned, and the head of the sleeve section 32 is provided with a positioning portion 321 which is abutted with the femur.
When the utility model is used, the end part of the driving rod 1 is in positioning abutting connection with the blade type lag screw 6, then the blade type lag screw 6 is in threaded connection with the threaded section 21 of the core rod 2, the limiting boss 23 and the inner hole of the lag screw form a limit, the guide section 33 of the guide sleeve 3 is sleeved on the periphery of the driving rod 1, the guide bead 11 of the driving rod 1 is in sliding fit along the spiral guide sliding groove 31, the sleeve section 32 of the guide sleeve 3 is detachably connected with the aiming handle through the locking knob, and as the tail part of the core rod 2 is positioned in the driving rod 1 and the tail end face of the core rod 2 is basically leveled with the tail end face of the driving rod 1, instead of being exposed outside the driving rod as in the prior art, the bone hammer can be directly knocked at the tail part of the core rod, if the core rod is loose, the core rod cannot effectively transmit knocking force to the sleeve, the core rod bears all knocking force, and the risk of breakage of the core rod is greatly increased.
The utility model avoids the direct contact between the bone hammer and the core rod in the use process, the bone hammer directly knocks the driving rod, the driving rod directly transmits the force to the lag screw, even if the core rod loosens in the knocking process, the core rod does not bear the knocking force, and the probability of looseness of the core rod is reduced due to the action of the ball plunger.
With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (9)
1. A blade lag screw driver, characterized in that: including driving pole (1), core bar (2) of being connected with lag screw cooperation to and guide sleeve (3) of being connected with the cooperation of aiming handle, it is hollow structure to drive pole (1), and drives the afterbody periphery of pole (1) and be equipped with handle (4), core bar (2) are established in driving pole (1) and are shaft hole cooperation rather than, and the head of core bar (2) exposes and is driving the outside of pole (1), and the afterbody of core bar (2) is located the inside of driving pole (1), guide sleeve (3) are established and are driving the periphery of pole (1) and guide sleeve (3) and are driving pole (1) direction cooperation.
2. The blade lag screw driver of claim 1, wherein: the head of the core bar (2) is provided with a thread section (21) which is connected with a lag screw in a matched manner, the tail of the core bar is provided with a hexagonal counter bore (22) which is convenient to screw in and screw out from the driving rod (1), and the thread section (21) is exposed outside the driving rod (1).
3. The blade lag screw driver of claim 1, wherein: the tail side wall of the handle (4) is provided with a threaded hole, a ball plunger (5) detachably connected with the handle is arranged in the hole, and anti-skid knurls arranged on the outer side of the tail outline of the core rod (2) are radially propped against the ball plunger (5) to prevent the core rod (2) from loosening.
4. The blade lag screw driver of claim 2, wherein: the head of the thread section (21) of the core bar (2) is provided with a limit boss (23) formed by the core bar and a lag screw.
5. The blade lag screw driver of claim 1, wherein: the driving rod is characterized in that a plurality of guide beads (11) are arranged on the peripheral wall of the driving rod (1) along the circumferential direction of the driving rod, a plurality of guide sliding grooves (31) which are spirally arranged are formed in the inner wall of the guide sleeve (3), and the guide beads (11) are in sliding fit with the guide sliding grooves (31) so that the driving rod (1) rotates along the guide sliding grooves (31) of the guide sleeve (3) through the guide beads (11).
6. The blade lag screw driver of claim 1, wherein: the head of the driving rod (1) is provided with an axial positioning bulge (12) which is matched with the notch of the lag screw in a positioning way.
7. The blade lag screw driver of claim 1, wherein: the rod body of the driving rod (1) is provided with an indication groove, the core rod is provided with an indication strip, and when the indication strip of the core rod (2) corresponds to the indication groove of the driving rod (1), the correct position of the lag screw is conveniently indicated.
8. The blade lag screw driver of claim 1, wherein: the guide sleeve (3) comprises a sleeve section (32) which is connected integrally or fixedly and is abutted against the femur, and a guide section (33) which is matched and connected with the aiming handle, wherein a guide chute (31) which is matched with the driving rod (1) in a guiding way is arranged in the guide section (33).
9. The blade lag screw driver of claim 8, wherein: the head of the sleeve section (32) is provided with a positioning part (321) which is abutted with the femur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322189360.8U CN220988898U (en) | 2023-08-14 | 2023-08-14 | Blade type lag screw driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322189360.8U CN220988898U (en) | 2023-08-14 | 2023-08-14 | Blade type lag screw driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220988898U true CN220988898U (en) | 2024-05-24 |
Family
ID=91088050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322189360.8U Active CN220988898U (en) | 2023-08-14 | 2023-08-14 | Blade type lag screw driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220988898U (en) |
-
2023
- 2023-08-14 CN CN202322189360.8U patent/CN220988898U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3636188B1 (en) | Self-holding screw head | |
| EP1916955B1 (en) | Headless compression screw with integrated reduction-compression instrument | |
| CN106415029B (en) | Screw and driving part with chamfering | |
| US4863383A (en) | self-taping screw-in bone implant for dental purposes | |
| EP3701893B1 (en) | Orthopedic locking screw | |
| TW201424673A (en) | Bone nail for the heel | |
| CN220988898U (en) | Blade type lag screw driver | |
| EP2990001B1 (en) | Osteosynthesis device for proximal femur fracture and master screw type screw device for osteosynthesis device for proximal femur fracture | |
| US20120283739A1 (en) | Bone tack driver | |
| CN104473685A (en) | Intra-fixing nail for repairing intra-articular cartilage fracture of human body | |
| CN112716585B (en) | Anti-rotation anti-retreat double-thread hollow nail | |
| CN208942242U (en) | Ligament fixing screws the reconstruction tool | |
| CN215079513U (en) | Anti-rotation anti-retreat hollow screw | |
| CN215079512U (en) | Anti-rotation anti-retreat headless hollow nail | |
| CN220850291U (en) | Warhead formula screw thread fixed head | |
| CN218875269U (en) | Screwdriver capable of being impacted | |
| CN217772542U (en) | Implant removal assembly | |
| CN211300291U (en) | Last nail subassembly of staple | |
| CN213156354U (en) | Hollow tail cap convenient to accurate putting in | |
| HU180779B (en) | Surgical set for driving and extracting medullary canal pin of clover section provided with longitudinal slot | |
| CN115530901A (en) | Suture anchor inserter | |
| CN116269712A (en) | Double-head pressurizing motorized screw | |
| CN111407358A (en) | Medical bone implant drill | |
| EP1764055A1 (en) | Device for removal of fastening means from human tissue |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |