CN101253025B - Screwdriver for an inner profile screw - Google Patents
Screwdriver for an inner profile screw Download PDFInfo
- Publication number
- CN101253025B CN101253025B CN2006800253371A CN200680025337A CN101253025B CN 101253025 B CN101253025 B CN 101253025B CN 2006800253371 A CN2006800253371 A CN 2006800253371A CN 200680025337 A CN200680025337 A CN 200680025337A CN 101253025 B CN101253025 B CN 101253025B
- Authority
- CN
- China
- Prior art keywords
- axle
- screwdriver
- profile
- screw
- movable sleeve
- 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.)
- Expired - Fee Related
Links
- 238000005267 amalgamation Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 7
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007943 implant Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
-
- 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
- A61B17/8875—Screwdrivers, spanners or wrenches
- A61B17/8886—Screwdrivers, spanners or wrenches holding the screw head
- A61B17/8888—Screwdrivers, spanners or wrenches holding the screw head at its central region
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B15/00—Screwdrivers
- B25B15/001—Screwdrivers characterised by material or shape of the tool bit
- B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
- B25B15/008—Allen-type keys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/02—Arrangements for handling screws or nuts
- B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
- B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
- B25B23/101—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means for hand-driven screw-drivers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/02—Arrangements for handling screws or nuts
- B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
- B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
- B25B23/105—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit
- B25B23/108—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit the driving bit being a Philips type bit, an Allen type bit or a socket
Abstract
The invention relates to a screw driver for an inner profile, which comprises a shaft and an outer profile head which is embodied in a manner which corresponds to the inner profile recess of the inner profile screw. The distal area of the shaft, which comprises an outer profile head, is embodied in a split manner and a bushing receives the shaft and can be displaced in relation therewith. At least one part of the shaft, which comprises a gap, is provided with an oblique contact member and the bushing is provided with a contact ring which acts upon the oblique contact member(s). When the bushing is displaced in relation to the shaft, the part of the shaft which comprises the oblique contact member, is cut and pulled away from the other part, by clamping the inner profile recess with the outer profile head.
Description
Technical field
The present invention relates to be used for the screwdriver of inner profile screw; This screwdriver is provided with axle and outer profile head; This outer profile head design becomes the inner profile recess corresponding to inner profile screw, and this screwdriver is particularly useful for implant is implanted the operation implant procedure in the human body.
Background technology
For example, in the process of implanting the clamping plate of wanting screw to be connected to bone, use the profile screw with a screwdriver usually, the head of this screwdriver is provided with the outer profile head, and this outer profile head cooperates with the inner profile recess of screw.Before screwing, importantly inner profile screw is remained in the head of screwdriver and can not skid off.
Can know a kind of like this screwdriver from DE 1 866 996; It is worked with the screw of hollow head; And its axle is divided into two and half ones by an axial clearance, and oneself opens owing to their spring action in this two and half one, and therefore they self is snapped in screw head.From US 4,770,494 can learn a kind of similar screwdriver of developing, when using this screwdriver, and can be through preceding pushing away the optional ground divided portion that a sleeve comes aiming axis.
In the screwdriver of these prior aries, they produce clamping force by the elastic properties of materials of the axle of being got back to deployed position, utilize this clamping force the each several part of axle to be pressed against on the inner profile recess in the inner profile screw.Therefore, this clamping force does not accurately limit, and will depend on tolerance (tolerance that yet comprises the inner profile recess aspect of screw).
Summary of the invention
Task of the present invention is to form a kind of screwdriver, and its researches and develops and manufacture very simple, particularly forms a kind of screwdriver, and it can apply reproducible clamping force, and irrelevant with the tolerance of screw inner profile recess.
According to an example embodiment of the present invention; Develop a kind of screwdriver that is used for inner profile screw; This screwdriver comprises axle and outside head profile; This outside head profile is designed to the inner profile recess corresponding to inner profile screw, and wherein, the remote area that axle has outside head profile forms with splitting mode; One sleeve is admitted this axle and its motion relatively; Said at least one in the each several part of the axle that is produced by amalgamation is provided with the inclination contact, and sleeve is provided with contact ring, and this contact ring acts on the inclination contact; And by the sleeve motion of axle relatively, through tightening the inner profile recess with the outer profile head, the said part that axle is provided with the inclination contact is separated from another part.
According to another example embodiment of the present invention; Develop a kind of screwdriver that is used for inner profile screw, this screwdriver comprises axle and outside head profile, and this outside head profile is designed to the inner profile recess corresponding to inner profile screw; Wherein, But this screwdriver is designed to have the sleeve of screwed, the axle that this sleeve admits elastomeric material to process, and the remote area that axle has outside head profile forms with splitting mode; In the each several part of the axle that is produced by amalgamation at least one is provided with the inclination contact, and sleeve is provided with contact ring, and this contact ring acts on the inclination contact; And by the sleeve rotation of axle relatively, through the outer profile head chucking inner profile recess with axle, the said part that axle is provided with the inclination contact is pulled away from another part.Particularly, this screwdriver can be arranged like this: nationality is by relative axle rotational sleeve, and through tightening the inner profile recess with the outer profile head, the said part that axle is provided with the inclination contact is pulled away from another part.
According to another example embodiment of the present invention; Develop a kind of screwdriver that is used for many sides hollow screw; This screwdriver comprises axle and outside many sides head, and this many sides, outside head design becomes many sides, the inside recess corresponding to many sides, inside screw, wherein; But this screwdriver is designed to have the sleeve of screwed, and this sleeve is admitted axle; The remote area that has outside many sides head of axle forms with splitting mode in symmetrical plane; Two amalgamation half parts of axle are provided with and are arranged to inclination contact respect to one another; And sleeve is provided with contact ring, and this contact ring acts on the inclination contact.Nationality is by relative axle rotational sleeve, through the outer profile head chucking inner profile recess with axle, half one that respectively separates of axle is pulled away from each other.Particularly, this screwdriver can be arranged like this: nationality is by relative axle rotational sleeve, and through tightening the inner profile recess with the outer profile head, the each several part that axle is provided with the inclination contact is pulled away from each other.
According to another example embodiment of the present invention; Develop a kind of screwdriver that is used for inner profile screw, this screwdriver comprises axle and outside head profile, and this outside head profile is designed to the inner profile recess corresponding to inner profile screw; Wherein, Axle has the remote area of outside head profile, processes with elastomeric material, and forms with splitting mode; The outer surface of this part of outside head profile forms thicklyer; This part is focused on another part along with reducing of gap after the inner profile recess that inserts screw, and flexibly is clamped in the inner profile recess.Preferably; A part can be provided with the inclination contact; And another part can be provided with sleeve, and this sleeve design is for having corresponding inclination contact, by this; Along the each several part (Ausrichten) aligned with each other that outside head profile insertion inner profile recess direction turnbarrel can be made axle, and rotary shell can make outside head profile be clamped in the inner profile recess in opposite direction.
The distal portions of the amalgamation of axle can form disconnectable (austauschbar).
The plane that extend in the gap can be the plane of a symmetry, is provided with but the plane, gap is preferably eccentric, that is, and asymmetric ground amalgamation axle.
Profile can be multi-sided profile, but also can be Torx or Torx Plus profile (architectural features of six sliver internal drive).
Description of drawings
To the present invention be described according to a design example of the present invention shown in the drawings below.Accompanying drawing illustrates:
Fig. 1 inner profile screw and the far-end that has the axle of outside head profile
The sleeve of the sliding sleeve of Fig. 2 under user mode to the axle
Fig. 3 is corresponding to Fig. 1 but rotated 90 ° figure
The specific embodiment
The screwdriver that is used to keep and rotates inner profile screw 10 comprises axle 12 and outside head profile 16, and this outside head profile is formed on the far-end of axle 12, and corresponding to the inner profile recess 14 of inner profile screw 10.Particularly, inner profile screw can form inner many sides recess, and this is corresponding to many sides, inside screw.
Attached on the axle 12 that the remote area that has outside head profile 16 forms with splitting mode have housing shown in Figure 2, and make outside head profile 16 keep free.
Particularly, but sleeve 18 can form the axle 12 screwed housing 18.
Two amalgamations part of axle 12 all is provided with inclination contact 20, and sleeve 18 is provided with contact ring 22, and this contact ring 22 acts on the inclination contact 20.Towards the near-end moving sleeve, 22 of contact rings lean on inclination contact 20 through relative axle 12, and each amalgamation part of axle 12 is pulled away from through the inner profile recess 14 of the head 10 of chucking screw each other.Through towards the axially displaced sleeve 18 of far-end; Contact ring 22 props up by the inclination contact once more; Each amalgamation part of outside head profile is owing to the elasticity of its material turns back to the final position; In this final position, the snap action between the outside head profile 16 of the inner profile recess 14 of the head 10 of screw and screwdriver weakens.This with regard to allow by means of sleeve relatively the rotation of axle 10 carry out axially displacedly, particularly form can screw with male thread the time, when promptly two elements all comprise complementary screw thread at sleeve 18.
The remote area that axle has outside many sides head 16 can form with splitting mode in symmetrical plane, and this symmetrical plane is arranged to be parallel to two faces in many sides.But, preferably, asymmetric ground of the remote area amalgamation of axle, i.e. amalgamation prejudicially is shown in accompanying drawing.Asymmetric amalgamation so particularly can make the axle two parts in a another part less than axle, promptly two parts have obstructed cross-sectional area.For example, one the less cross-sectional area in two parts be another cross-sectional area 1/3rd to 1/8th.Asymmetric division like this can bring following advantage: be applied to the fracture that the power that moment of torsion produced on two parts of axle can prevent axle through using screwdriver, or the fracture of retardation axis at least, just can rupture when promptly only applying bigger moment of torsion.
In addition, two amalgamation half parts of axle 12 can be provided with and be arranged to inclination contact respect to one another, and sleeve 18 can be provided with the contact ring that acts on one of inclination contact 20.But under the situation of screwed sleeve, along with the relatively rotation of axle of sleeve, amalgamation half part of axle 12 is sheared and is pulled away from (weggeschert) through the chucking to many sides, inside recess (inner profile recess) 10 of many sides head (head profile) 14.Make contact ring 22 leave inclination contact 20 once more through turnbarrel 18, half part that separates of outside many sides head is owing to the elasticity of material is got back to the final position.
In the embodiment (not shown) that substitutes, the remote area that axle 12 has many sides head 16 forms with splitting mode in symmetrical plane in the corresponding way.One and half parts of mosaic piece (in absence of power) under than the little angle of second half part of mosaic piece receive to shear (verschert).Get into many sides, inside recess of screw 10 and utilize the elasticity of outside many sides head material to tighten they self through the outside many sides head that makes amalgamation, two and half parts are aimed at.
In another embodiment that substitutes, one in two divided portion of axle 12 is provided with inclination contact 20, and sleeve 18 is provided with the contact ring on that acts in the inclination contact 20.Along with the relatively rotation of axle of sleeve, amalgamation half part of axle 12 is sheared out through the chucking to the inner profile recess 10 of head profile 14.Make contact ring 22 leave inclination contact 20 once more along with turnbarrel 18, the divided portion of outside head profile is owing to the elasticity of material turns back to the final position.
In the embodiment (not shown) that substitutes, the remote area that axle 12 has outside head profile 16 forms with the amalgamation form.A part of this mosaic piece is sheared with the angle littler than another part of mosaic piece.Get into the inner recesses profile of screw 10 and, aim at two and half parts through the outer profile head that makes amalgamation because the elastic properties of materials of outside head profile tightens they self.By this, described in previous embodiment, a sleeve can be set, through this sleeve, each several part energy of rotation relative to each other forms to be aimed at, thereby and makes outside many sides head can insert inner many sides recess.Through the revolution sleeve, each several part can be in the final position of shearing once more, thus they self is clamped in the inner profile recess.
In another embodiment; Form the outward-dipping side of a part of many sides, outside head thicker; Through inserting inner bull portion profile; This part self moves more near another part, causes gap width to reduce, thereby chucking pressure is applied on the respective side of inner many sides recess.
In each above-mentioned instance, sleeve (preferably via torque limiter) by this loads the power of qualification, thereby can guarantee to apply the clamping force of qualification and irrelevant with tolerance.In addition, in each above-mentioned instance, can not only form axle with splitting mode simply, and can the part of far-end of separating or amalgamation forms axle be removed, promptly in the transverse cross-sectional area of axle, form groove or recess.In other words, the cross-sectional area of two parts reproduces the inner profile of screw no longer fully, but the cross-sectional area that is provided is less than the cross-sectional area of the inner profile of inner profile screw.Through inserting screwdriver, such recess can increase the fracture resistance of screwdriver axle.
Should notice that particularly the content that the characteristic of all above-mentioned combination one embodiment is described all can be combined with the characteristic of other embodiment.
Claims (8)
1. the screwdriver that is used for inner profile screw (10); This screwdriver is provided with axle (12) and outside head profile (16); This outside head profile forms the inner profile recess (14) corresponding to said inner profile screw (10); Wherein, The remote area that has said outside head profile of said axle (12) forms with splitting mode, and a movable sleeve (18) is admitted said axle and its motion relatively, is provided with inclination contact (20) by the said at least part in the each several part of spool (12) of said amalgamation generation;
Said movable sleeve (18) is provided with contact ring (22), and this contact ring acts on the said inclination contact (20); And
By the motion of the said relatively axle of said movable sleeve (18) (12) towards near-end; Through tightening said inner profile recess (14) with said outside head profile (16); The said part that is provided with said inclination contact (20) of said axle (12) is pulled away from another part; By the motion of the said relatively axle of said movable sleeve (18) (12) towards far-end; The each several part that makes said axle (12) is owing to the elasticity of its material turns back to the final position, and in this final position, the snap action between said inner profile recess (14) and the said outside head profile (16) weakens.
2. screwdriver as claimed in claim 1 is characterized in that,
Said axle (12) is processed by elastomeric material;
Said movable sleeve (18) forms the housing that can screw with said male thread;
And the motion of said movable sleeve (18) is the rotation of the said relatively axle of said movable sleeve (18) (12).
3. according to claim 1 or claim 2 screwdriver is characterized in that, the plane in the gap of the remote area of said axle (12) is arranged prejudicially.
4. screwdriver as claimed in claim 1 is characterized in that,
Said inner profile screw is inner many sides screw (10);
Said outside head profile (16) forms outside many sides head (16);
Said movable sleeve (18) forms screwed and arrives the sleeve on the said axle (12);
Many sides, said outside head (16) forms with splitting mode in symmetrical plane, and two amalgamation half parts of said axle (12) are provided with inclination contact respect to one another (20); And
Rotate the motion that said movable sleeve (18) is realized said movable sleeve (18) through said relatively axle (10).
5. screwdriver as claimed in claim 4 is characterized in that, said axle (12) is to be parallel to two face amalgamations in said a plurality of side.
6. screwdriver as claimed in claim 1 is characterized in that, the remote area of the said amalgamation of said axle (12) is disconnectable.
7. screwdriver as claimed in claim 1 is characterized in that said screwdriver comprises torque limiter.
8. screwdriver as claimed in claim 1 is characterized in that, said axle (12) is included in the recess in its cross section.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202005011010.8 | 2005-07-13 | ||
| DE200520011010 DE202005011010U1 (en) | 2005-07-13 | 2005-07-13 | Screw driver for inner multi-angled screw has shaft enclosed by sleeve and split at distal end with outer multi-facet head for clamping action as sleeve is turned relative to shaft |
| DE202005019646U DE202005019646U1 (en) | 2005-07-13 | 2005-12-16 | Screwdriver for an internal profile screw |
| DE202005019646.0 | 2005-12-16 | ||
| PCT/DE2006/001185 WO2007006282A2 (en) | 2005-07-13 | 2006-07-08 | Screwdriver for an inner profile screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101253025A CN101253025A (en) | 2008-08-27 |
| CN101253025B true CN101253025B (en) | 2012-03-14 |
Family
ID=35070919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800253371A Expired - Fee Related CN101253025B (en) | 2005-07-13 | 2006-07-08 | Screwdriver for an inner profile screw |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101253025B (en) |
| DE (1) | DE202005011010U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107242900A (en) * | 2017-07-12 | 2017-10-13 | 武永刚 | Orthopaedics internal fixation screw extractor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4779494A (en) * | 1987-04-21 | 1988-10-25 | New Concepts | Screwdriver having screw gripping feature |
| CN2080444U (en) * | 1990-11-10 | 1991-07-10 | 江苏省滨海县石化机械配件厂 | Locking type screwdriver |
| GB2389551A (en) * | 2002-06-13 | 2003-12-17 | Martin Philcox | Screwdriver with holding feature for socket screws |
-
2005
- 2005-07-13 DE DE200520011010 patent/DE202005011010U1/en not_active Expired - Lifetime
-
2006
- 2006-07-08 CN CN2006800253371A patent/CN101253025B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4779494A (en) * | 1987-04-21 | 1988-10-25 | New Concepts | Screwdriver having screw gripping feature |
| CN2080444U (en) * | 1990-11-10 | 1991-07-10 | 江苏省滨海县石化机械配件厂 | Locking type screwdriver |
| GB2389551A (en) * | 2002-06-13 | 2003-12-17 | Martin Philcox | Screwdriver with holding feature for socket screws |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107242900A (en) * | 2017-07-12 | 2017-10-13 | 武永刚 | Orthopaedics internal fixation screw extractor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101253025A (en) | 2008-08-27 |
| DE202005011010U1 (en) | 2005-09-29 |
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| PB01 | Publication | ||
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161216 Address after: michigan Patentee after: Stryker Europe holding LLC Address before: michigan Patentee before: Six Stryker Europe holding LLC Effective date of registration: 20161216 Address after: michigan Patentee after: Six Stryker Europe holding LLC Address before: German Sean Patentee before: Strick Joma Ltd. |
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| CP03 | Change of name, title or address |
Address after: 2825 bird's-eye drive, Kalamazoo, Michigan, USA Patentee after: Stryker Europe operations Holdings Ltd. Address before: 1209 orange street, Wilmington, Delaware, USA Patentee before: Stryker Europe holdings III Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220110 Address after: 1209 orange street, Wilmington, Delaware, USA Patentee after: Stryker Europe holdings III Co.,Ltd. Address before: Michigan, USA Patentee before: Stryker Europe holding LLC |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 |
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| CF01 | Termination of patent right due to non-payment of annual fee |