CN107242900A - Orthopaedics internal fixation screw extractor - Google Patents
Orthopaedics internal fixation screw extractor Download PDFInfo
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- CN107242900A CN107242900A CN201710567539.9A CN201710567539A CN107242900A CN 107242900 A CN107242900 A CN 107242900A CN 201710567539 A CN201710567539 A CN 201710567539A CN 107242900 A CN107242900 A CN 107242900A
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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
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Abstract
The present invention relates to a kind of orthopaedics internal fixation screw extractor, difficult problem is taken out to solve orthopaedics internal fixation screw, it is outer six rib or Magen David spanner cylinder of the valve composition of left and right two for the upper similarly hereinafter thick or lower end above overstriking that tool steel is made, upper end snap fit has upper end cap or is hinged；The right valve bottom of outer six ribs or Magen David spanner cylinder is fixed with stretches out one's hand handle for rotating the side of reinforcing, and the clockwise rear inner face of right valve spanner cylinder bottom, which is equipped with, is used for the spring outwardly against outer six rib or the left valve opposing inner end face of Magen David spanner cylinder bottom.Outer six rib of the valve composition of left and right two or Magen David spanner cylinder lower end periphery are formed with and counterclockwise tiltedly stretch double wedge.Easy to use with that can significantly increase snap-in force, anti-slip performance is good, low-cost, does not produce metal fragment, not quantity of heat production, high safety, is not likely to produce slide fastener and is particularly suitable for the advantage of slide fastener screw taking-up.
Description
Technical field
The present invention is a kind of orthopaedics internal fixation screw extractor, especially relates to a kind of orthopaedics internal fixation screw and takes out
Device.
Background technology
Orthopaedic trauma fixes very universal, plate screw major part needs after union of fracturing using plate screw
Take out, screw slide fastener occurs during taking-up and happens occasionally, particularly titanium alloy plate and Titanium Alloy Screw go out in recent years
Existing, the situation of slide fastener is even more common, is orthopedist's very stubborn problem.There is the situation of screw slide fastener, it is conventional at present
Method be to be bored the tail cap of screw to deepen with wolfram steel, bored with taper left-hand thread, be connected on T handles or on electric drill, firmly indulge
To screw, and counter-rotating is pressed to, bore taper left-hand thread and occur " lock " with screw, sometimes can successfully take out screw
Nail, but can not sometimes occur " to latch ", or even after sometimes generation unexpected " lock ", the unexpected fracture that left-hand thread is bored.
Also it is exactly to saw that steel plate is sawed-off with steel plate, exposes screw tail cap, then try every possible means to back-out screw, but can be produced with steel plate saw
A large amount of metal fragments, high temperature, it is easy to cause soft tissue injury, or even occur refracture.
The content of the invention
Present invention aims to overcome that the drawbacks described above of prior art there is provided one kind it is easy to use, anti-slip performance is good
Orthopaedics internal fixation screw extractor.
To achieve the above object, orthopaedics internal fixation screw extractor of the present invention is the upper similarly hereinafter thick or lower end that tool steel is made
Outer six rib or Magen David spanner cylinder of the valve composition of left and right two of above overstriking, upper end snap fit have upper end cap or are hinged；
The right valve bottom of outer six ribs or Magen David spanner cylinder is fixed with stretches out one's hand handle, right valve spanner cylinder lower end for rotating the side of reinforcing
The clockwise rear inner face in portion, which is equipped with, is used for the left valve phase outwardly against outer six rib or Magen David spanner cylinder bottom
To the spring of inner face.The spring includes all springs such as helical spring, spring-piece type spring, elater formula spring.In use,
When stretching out one's hand handle downwardly against upper end cap, another hand rotate counterclockwise side on the other hand, right valve（Counterclockwise）Leading inside face will
Extrude left valve（Counterclockwise）Rear inside face, adds spring-supported right valve（Counterclockwise）Rear inside face and left valve
（Counterclockwise）The opening force in leading inside face so that outer six rib or Magen David spanner lower end of the valve of left and right two composition can
Interior six rib or the Magen David notch in screw tail cap are held, so as to significantly mitigate the taking-up difficulty of screw；By two valves composition
Outer six rib or Magen David spanner lower end insertion screw tail cap on interior six rib or Magen David notch before, should with pliers or its
Outer six rib that its fixture constitutes the valve of left and right two or Magen David spanner cylinder bottom are clamped, interior six rib in insertion screw tail cap or
After Magen David notch, while firmly upper end cap is pinned downwards, pliers or other fixtures are unclamped, the valve group of spring handle or so two is allowed
Into outer six rib or Magen David spanner lower end strut, spanner lower end periphery is tightly propped up interior six rib in screw tail cap
Or Magen David notch.Lower end above overstriking can be a step overstriking or first overstriking first paragraph upwards, in preceding overstriking first
Further remaining section of upward overstriking on the basis of section, certainly, the length of the first overstriking section is several times as much as lower end length, and remaining adds
Thick section as wrench body principal piece.With easy to use, the good advantage of anti-slip performance.
As optimization, outer six rib of the valve of left and right two composition or Magen David spanner cylinder lower end periphery are formed with counterclockwise
Tiltedly stretch double wedge.The introducing of double wedge is counterclockwise tiltedly stretched in periphery, can significantly increase snap-in force, anti-skidding with more easy to use
De- performance is good, low-cost, does not produce metal fragment, not quantity of heat production, and high safety is not likely to produce slide fastener and is particularly suitable for slide fastener
The advantage that screw takes out.
As optimization, it is the outer lateral edges face of spanner cylinder lower end or Magen David side face that the counter clockwise direction, which tiltedly stretches double wedge,
The vertical edges that extroversion is extended perpendicularly out guide the oblique of its outer lateral edges face or Magen David side face into clockwise with from the vertical side end
The counter clockwise direction that straight flange is surrounded tiltedly stretches double wedge.The anticlockwise skewed horizontal load power of so double wedge is strong.
As optimization, spanner cylinder upper end snap fit has a handle type upper end cap for reinforcing downwards, spanner cylinder upper end with
Upper end cap gap set is matched somebody with somebody or spanner cylinder upper end is matched somebody with somebody with upper end cap gap set, and week and upper end cap on the outside of spanner cylinder upper end
Inner side is formulated with elastic collision bead and matched annular groove or pit between week；Or spanner cylinder upper end is in downward reinforcing
Joystick type and be hinged by transverse axis or universal drive shaft or bulb ball bowl.The handle type upper end cap and spanner cylinder upper end are in downward
The joystick type of reinforcing and to be hinged by transverse axis be exactly that their upper ends are in conveniently to push the flat convex of reinforcing, and there are enough areas to use
In sharing the pressure that bears.When annular groove uses annular groove, at least upper end of spanner cylinder and matched upper end cap
Lumenal cross-section is all circle.
As optimization, more than the valve lower end of left and right two of spanner cylinder all overstriking or the right valve lower end that handle is stretched out one's hand in side is only fixedly mounted with
Stretch out one's hand the right valve bottom that handle is packed in overstriking in above overstriking, side.It is more than the valve lower end of left and right two of spanner cylinder all overstriking when, overstriking
Into circle.
As optimization, side stretch out one's hand handle for it is horizontal stretch handle or it is upper tiltedly stretch handle, side is stretched handle base and consolidated in horizontal shape of stretching with right valve bottom
Connect or side stretches handle base and presents ramp-like connected with right valve bottom.On tiltedly stretch handle top rade be 30 or 45 degree or so.
As optimization, the valve lower end of left and right two of spanner cylinder is symmetrical two valve that left and right is divided equally, the left and right two of spanner cylinder
More than valve lower end all overstrikings, the big portion of thickened portion is that the right valve with handle, the small portion of thickened portion are left valve.Thickened portion area
2/3 or so be the right valve with handle, 1/3 or so of thickened portion area be left valve.
As optimization, the valve of the left and right two at least lower end of spanner cylinder is symmetrical two valve that left and right is divided equally, its equal separated time position
In on diagonal or on the center line of opposite side；The spring is from after the right valve of spanner cylinder bottom is clockwise
Spiral support spring or spring-piece type spring or elater spring that the lateral pit of inner face is laterally ejected.
As optimization, right valve overstriking more than lower end；Or Partial synchronization overstriking more than the valve lower end of left and right two or left and right
The big portion of the different overstrikings in more than two valve lower ends part and thickened portion is that the right valve with handle, the small portion of thickened portion are left valve；
The clockwise rear inner face of right valve spanner cylinder bottom is formed with lateral pit, and the spring is spiral support spring base
Portion is packed in side pit bottom, outer end and ejected from pit is laterally outer；Or the spring is that the implantation of spring-piece type spring base portion is lateral
Ejected from pit is laterally outer at the inside and outside end of pit.
As optimization, spanner cylinder lower end is furnished with lower endcaps, and two valve spanner cylinder bottoms are furnished with binding clasp.The binding clasp
That side stretches handle base and is hinged a movable depression bar by transverse axis, when movable depression bar is lifted up, two valves of release, movable depression bar from
When up to pulling to level down, two valves are extruded and closed.
Present apparatus main part is made up of 2 half 6 ribs or Magen David cylinder（Two parts constitute complete positive six
Rib or Magen David cylinder, its lower end match with the interior hexagonal or interior Magen David tail cap notch or blind hole of screw.Two valve lower ends
There are longitudinal groove or the double wedge stretched counterclockwise to side, groove or the double wedge triangle at a right angle stretched counterclockwise to side, ditch in side
Groove or the vertical edges of double wedge stretched counterclockwise to side towards direction counterclockwise, can increase they with slide fastener screw tail cap
Frictional force between the wall of side, there is an elastic wire or spring between 2 half 6 ribs or Magen David cylinder, elastic wire or spring make
The valve lower end of main part two separate, the pressure of notch between six ribs or Magen David cylinder and tail cap can be increased, when two valves simultaneously
When being placed in screw tail cap, elastic wire or spring open.Slave part is by connecting one and half six ribs or Magen David cylinder
Side stretch out one's hand handle and fastening or tighten the upper end cap of two and half six ribs or Magen David cylinder upper end.
In use, body lower part is clamped, lower end is placed in the screw tail cap of slide fastener, elastic wire or spring make two
Half six ribs or Magen David spanner cylinder is divided to be separated from each other, it is initial between six ribs of increase or Magen David spanner cylinder and tail cap inwall
Pressure, catches upper end cap on the other hand, and another hand catches side to stretch out one's hand handle, and rotate counterclockwise main part keeps wrench body part
Erectility.Now, pressure can increase between 2 half 6 ribs or Magen David spanner cylinder lower end and tail cap inwall, so friction
Power can also increase, and the strength of rotate counterclockwise is bigger, and resulting frictional force is bigger, eventually back-out the screw of slide fastener.
After adopting the above technical scheme, orthopaedics internal fixation screw extractor of the present invention, which has, can significantly increase snap-in force,
Easy to use, anti-slip performance is good, low-cost, does not produce metal fragment, not quantity of heat production, and high safety is not likely to produce slide fastener
With the advantage for being particularly suitable for the taking-up of slide fastener screw.
Brief description of the drawings
Fig. 1 is the main structure diagram of the first embodiment of orthopaedics internal fixation screw extractor of the present invention；Fig. 2 is this
The right side structural representation of the first embodiment of invention orthopaedics internal fixation screw extractor；Fig. 3 is Fig. 2 A-A direction views；Figure
4-5 is the bottom main structure diagram of second and third kind of embodiment of orthopaedics internal fixation screw extractor of the present invention respectively；Figure
6-9 be respectively orthopaedics internal fixation screw extractor fourth, fifth of the present invention, six, the lower right of seven kind of embodiment regard structural representation
Figure.
Embodiment
Embodiment one, as Figure 1-3, orthopaedics internal fixation screw extractor of the present invention be tool steel be made it is upper similarly hereinafter
Slightly（Or lower end above overstriking）Left and right two valve composition bottom outside six prismatics（Or Magen David）, upper cylindrical spanner cylinder,
Upper end snap fit has upper end cap 3（Or be hinged）；Outer six rib（Or Magen David）The right bottom of valve spanner cylinder 1 of spanner cylinder is consolidated
Equipped with handle 4 is stretched out one's hand for rotating the side of reinforcing, the clockwise rear inner face of the right bottom of valve spanner cylinder 1, which is equipped with, to be used for
Outwardly against the spring 5 in the opposing inner end face of the left bottom of valve spanner cylinder 2.The spring includes helical spring, spring-piece type bullet
All springs such as spring, elater formula spring.
Specifically：Symmetrical two valve that the valve of left and right two of spanner cylinder is divided equally for left and right, its equal separated time is located on diagonal（
Can be on the center line of opposite side）；The spring 5 is the clockwise rear inner face of right valve from spanner cylinder bottom
The spring-piece type spring 5 that lateral pit is laterally ejected（Or spiral support spring or elater formula spring）.The right bottom of valve spanner cylinder 1
Clockwise rear inner face be formed with lateral pit 10, the spring 5 is spring-piece type spring（Or elater formula spring）Base portion
The inside and outside end of lateral pit is implanted into from the lateral outer ejection of pit 10（Or the spring is that spiral support spring base portion is packed in side
Pit bottom, outer end are ejected from pit is laterally outer）.
Specifically：Outer six rib of the valve composition of left and right two or Magen David spanner cylinder lower end periphery are formed with counterclockwise tiltedly
Stretch double wedge 7.It is the outer lateral edges face of spanner cylinder lower end that the counter clockwise direction, which tiltedly stretches double wedge 7,（Or Magen David side face）Extroversion is hung down
The vertical edges directly stretched out guide its outer lateral edges face into clockwise with from the vertical side end（Or Magen David side face）Oblique straight flange
The counter clockwise direction surrounded tiltedly stretches double wedge 7.The anticlockwise skewed horizontal load power of so double wedge is strong.Periphery is counterclockwise oblique
The introducing of double wedge 7 is stretched, snap-in force can be significantly increased, with more easy to use, anti-slip performance is good, low-cost, does not produce
Metal fragment, quantity of heat production, high safety, are not likely to produce slide fastener and are particularly suitable for the advantage of slide fastener screw taking-up.
Specifically：Spanner cylinder upper end snap fit has a handle type upper end cap 3 for reinforcing downwards, spanner cylinder upper end with it is upper
End cap 3 gap set is matched somebody with somebody, and be formulated with the outside of spanner cylinder upper end between the inner side week of week and upper end cap 3 elastic collision bead 31 and with
Cooperation annular groove 30（Or pit）.When annular groove uses annular groove, at least the upper end of spanner cylinder and match somebody with somebody therewith
The upper end cap lumenal cross-section of conjunction is all circle.（Can also be that spanner cylinder upper end is in the joystick type that reinforces downwards and by horizontal stroke
Axle or universal drive shaft or bulb ball bowl are hinged）.The handle type upper end cap 3（Or spanner cylinder upper end joystick type and cut with scissors by transverse axis
Connect is in reinforce downwards in the joystick type reinforced downwards）It is exactly that their upper ends are in the flat convex for conveniently pushing reinforcing, and has enough
Area be used to share the pressure that bears.Side stretches out one's hand handle 4 and stretches handle to be horizontal, and side stretches out one's hand the base portion of handle 4 and stretches shape and right valve bottom in horizontal
It is connected（Or side stretches handle base and presents ramp-like connected with right valve bottom.On tiltedly to stretch the top rade of handle be preferably 30 or 45 degree left
It is right）.
Specifically：Spanner cylinder lower end is furnished with lower endcaps, and two valve spanner cylinder bottoms are furnished with binding clasp.Two valve is clamped
Device is that side stretches out one's hand the base portion of handle 4 and is hinged a movable depression bar by transverse axis, when movable depression bar is lifted up, two valves of release, activity pressure
When bar is pulled to level from top to bottom, two valves are extruded and closed.
In use, when proficiency stretches out one's hand handle downwardly against upper end cap or upper end, another hand rotate counterclockwise side, right valve（It is inverse
Clockwise）Leading inside face will extrude left valve（Counterclockwise）Rear inside face, adds spring-supported right valve（Inverse time
Pin direction）Rear inside face and left valve（Counterclockwise）The opening force in leading inside face so that outer the six of the valve of left and right two composition
Rib or Magen David spanner lower end can hold interior six rib or Magen David notch in screw tail cap, so as to significantly mitigate spiral shell
The taking-up difficulty of nail；Six ribs or hexagonal in outer six rib or Magen David spanner lower end the insertion screw tail cap that two valves are constituted
Before star notch, outer six rib or Magen David spanner cylinder bottom that the valve of left and right two should be constituted with pliers or other fixtures are clamped,
Insert screw tail cap on interior six rib or Magen David notch after, firmly pin upper end cap downwards while, unclamp pliers or its
Its fixture, allows outer six rib or Magen David spanner lower end that the valve of spring handle or so two is constituted to strut, makes spanner lower end periphery tight
Tightly prop up interior six rib or the Magen David notch in screw tail cap.Lower end above overstriking can be a step overstriking or elder generation
Upward overstriking first paragraph, further remaining section of upward overstriking on the basis of preceding overstriking first paragraph, certainly, the length of the first overstriking section
The number of degrees times lower end length, remaining overstriking section as wrench body principal piece.With easy to use, anti-slip performance is good
Advantage.
Embodiment two, as shown in figure 4, orthopaedics internal fixation screw extractor of the present invention and the difference of embodiment one are spanner
More than the valve lower end of left and right two of cylinder synchronous overstriking is into circle, and the right valve bottom that handle 4 is packed in overstriking is stretched out one's hand in side.
Embodiment three, as shown in figure 5, orthopaedics internal fixation screw extractor of the present invention and the difference of embodiment one are spanner
Cylinder is only fixedly mounted with the right valve lower end above overstriking that handle 4 is stretched out one's hand in side, and the right valve bottom that handle 4 is packed in overstriking is stretched out one's hand in side.Can also be：
Symmetrical two valve that the valve lower end of left and right two of spanner cylinder is divided equally for left and right, the big portion of thickened portion is the right valve with handle, overstriking portion
The 1 small portion divided is left valve.2/3 or so of thickened portion area is the right valve with handle, 1/3 or so of thickened portion area is left
Valve.
Example IV, as shown in fig. 6, orthopaedics internal fixation screw extractor of the present invention and the difference of embodiment one are that side is stretched
Handle 4 tiltedly stretches handle to be upper, and side is stretched out one's hand the base portion of handle 4 and is connected in horizontal shape of stretching with right valve bottom.On tiltedly to stretch the top rade of handle be preferably 30
Or 45 degree or so.
Embodiment five, as shown in fig. 7, orthopaedics internal fixation screw extractor of the present invention and the difference of embodiment one are to stretch out one's hand
Handle 4 tiltedly stretches handle to be upper, and side stretches out one's hand the base portion of handle 4 and presents ramp-like connected with right valve bottom.On tiltedly stretch handle top rade be preferably 30 or
45 degree or so.
Embodiment six, as shown in figure 8, the difference of orthopaedics internal fixation screw extractor of the present invention and example IV is spanner
More than the valve lower end of left and right two of cylinder synchronous overstriking is only fixedly mounted with the right valve lower end above overstriking that handle is stretched out one's hand in side, and handle 4 is stretched out one's hand in side
It is packed in the right valve bottom of overstriking.
Embodiment seven, as shown in figure 9, orthopaedics internal fixation screw extractor of the present invention and the difference of embodiment five are spanner
More than the valve lower end of left and right two of cylinder synchronous overstriking is only fixedly mounted with the right valve lower end above overstriking that handle is stretched out one's hand in side, and handle 4 is stretched out one's hand in side
It is packed in the right valve bottom of overstriking.
Present apparatus main part is made up of 2 half 6 ribs or Magen David cylinder（Two parts constitute complete positive six
Rib or Magen David cylinder, its lower end match with the interior hexagonal or interior Magen David tail cap notch or blind hole of screw.Two valve lower ends
There are longitudinal groove or the double wedge stretched counterclockwise to side, groove or the double wedge triangle at a right angle stretched counterclockwise to side, ditch in side
Groove or the vertical edges of double wedge stretched counterclockwise to side towards direction counterclockwise, can increase they with slide fastener screw tail cap
Frictional force between the wall of side, there is an elastic wire or spring between 2 half 6 ribs or Magen David cylinder, elastic wire or spring make
The valve lower end of main part two separate, the pressure of notch between six ribs or Magen David cylinder and tail cap can be increased, when two valves simultaneously
When being placed in screw tail cap, elastic wire or spring open.Slave part is by connecting one and half six ribs or Magen David cylinder
Side stretch out one's hand handle and fastening or tighten the upper end cap of two and half six ribs or Magen David cylinder upper end.
In use, body lower part is clamped, lower end is placed in the screw tail cap of slide fastener, elastic wire or spring make two
Half six ribs or Magen David spanner cylinder is divided to be separated from each other, it is initial between six ribs of increase or Magen David spanner cylinder and tail cap inwall
Pressure, catches upper end cap on the other hand, and another hand catches side to stretch out one's hand handle, and rotate counterclockwise main part keeps wrench body part
Erectility.Now, pressure can increase between 2 half 6 ribs or Magen David spanner cylinder lower end and tail cap inwall, so friction
Power can also increase, and the strength of rotate counterclockwise is bigger, and resulting frictional force is bigger, eventually back-out the screw of slide fastener.
After adopting the above technical scheme, orthopaedics internal fixation screw extractor of the present invention, which has, can significantly increase snap-in force,
Easy to use, anti-slip performance is good, low-cost, does not produce metal fragment, not quantity of heat production, and high safety is not likely to produce slide fastener
With the advantage for being particularly suitable for the taking-up of slide fastener screw.
Claims (10)
1. a kind of orthopaedics internal fixation screw extractor, it is characterised in that the upper similarly hereinafter thick or lower end above overstriking that tool steel is made
Outer six rib or Magen David spanner cylinder of the valve composition of left and right two, upper end snap fit have upper end cap or are hinged；Outer six rib or six
The right valve bottom of angle star spanner cylinder is fixed with stretches out one's hand handle for rotating the side of reinforcing, right valve spanner cylinder bottom it is clockwise
The rear inner face in direction is equipped with for the left valve opposing inner end face outwardly against outer six rib or Magen David spanner cylinder bottom
Spring.
2. screw extractor according to claim 1, it is characterised in that outer six rib or Magen David spanner of the valve of left and right two composition
Cylinder lower end periphery, which is formed with, counterclockwise tiltedly stretches double wedge.
3. screw extractor according to claim 2, it is characterised in that it is spanner cylinder that the counter clockwise direction, which tiltedly stretches double wedge,
The vertical edges that the outer lateral edges face of lower end or Magen David side face extroversion are extended perpendicularly out are guided into clockwise with from the vertical side end
The counter clockwise direction that the oblique straight flange in its outer lateral edges face or Magen David side face is surrounded tiltedly stretches double wedge.
4. screw extractor according to claim 1, it is characterised in that spanner cylinder upper end snap fit has for reinforcing downwards
Handle type upper end cap, spanner cylinder upper end is matched somebody with somebody with upper end cap gap set or spanner cylinder upper end is matched somebody with somebody with upper end cap gap set, and
On the outside of spanner cylinder upper end elastic collision bead and matched annular groove or recessed are formulated between the inner side week of week and upper end cap
Hole；Or spanner cylinder upper end is in the joystick type reinforced downwards and is hinged by transverse axis or universal drive shaft or bulb ball bowl.
5. screw extractor according to claim 4, it is characterised in that more than the valve lower end of left and right two of spanner cylinder all overstrikings
Or the right valve lower end above overstriking that handle is stretched out one's hand in side is only fixedly mounted with, the right valve bottom that handle is packed in overstriking is stretched out one's hand in side.
6. screw extractor according to claim 5, it is characterised in that side stretch out one's hand handle for it is horizontal stretch handle or it is upper tiltedly stretch handle, side is stretched out one's hand
Handle base portion stretches that shape and right valve bottom are connected or side is stretched handle base and presented and ramp-like is connected with right valve bottom in horizontal.
7. screw extractor according to claim 5, it is characterised in that the valve lower end of left and right two of spanner cylinder is divided equally for left and right
Symmetrical two valve, more than the valve lower end of left and right two of spanner cylinder all overstrikings, the big portion of thickened portion is the right valve with handle, overstriking portion
The small portion divided is left valve.
8. screw extractor according to claim 1, it is characterised in that the valve of the left and right two at least lower end of spanner cylinder is left
Symmetrical two valve that the right side is divided equally, its equal separated time is located on diagonal or on the center line of opposite side；The spring is from spanner post
Spiral support spring or spring-piece type spring that the clockwise rear lateral pit of inner face of right valve of body bottom is laterally ejected
Or elater formula spring.
9. screw extractor according to claim 8, it is characterised in that right valve overstriking more than lower end；Or under the valve of left and right two
The big portion of more than the Partial synchronization overstriking of the end above or the valve lower end of the left and right two different overstrikings in part and thickened portion is with handle
Right valve, the small portion of thickened portion are left valve；The clockwise rear inner face of right valve spanner cylinder bottom is formed with lateral recessed
Hole, the spring is that spiral support spring base portion is packed in side pit bottom, outer end and ejected from pit is laterally outer；Or the bullet
Spring is that spring-piece type spring or elater formula spring base portion are implanted into the lateral inside and outside end of pit and ejected from pit is laterally outer.
10. according to any screw extractors of claim 1-9, it is characterised in that be furnished with lower endcaps, two in spanner cylinder lower end
It is furnished with binding clasp in valve spanner cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710567539.9A CN107242900B (en) | 2017-07-12 | 2017-07-12 | Orthopaedics internal fixation screw extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710567539.9A CN107242900B (en) | 2017-07-12 | 2017-07-12 | Orthopaedics internal fixation screw extractor |
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| Publication Number | Publication Date |
|---|---|
| CN107242900A true CN107242900A (en) | 2017-10-13 |
| CN107242900B CN107242900B (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710567539.9A Expired - Fee Related CN107242900B (en) | 2017-07-12 | 2017-07-12 | Orthopaedics internal fixation screw extractor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113181546A (en) * | 2021-04-29 | 2021-07-30 | 曲靖市第一人民医院 | Hemodialysis pipe tip locking structure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1866996U (en) * | 1962-12-14 | 1963-02-07 | Horst Giel | WRENCH FOR SCREWS WITH HEXAGON SOCKET, CROSS SLOT OD. DGL. |
| CN86201409U (en) * | 1986-03-13 | 1987-04-15 | 杜忠 | Screwdriver with hold and carrying screw |
| GB2389551A (en) * | 2002-06-13 | 2003-12-17 | Martin Philcox | Screwdriver with holding feature for socket screws |
| CA2614779A1 (en) * | 2005-07-13 | 2007-01-18 | Stryker Trauma Gmbh | Screwdriver for an inner profile screw |
| WO2007021850A1 (en) * | 2005-08-12 | 2007-02-22 | Smith & Nephew, Inc. | Fastener retainer and driver |
| US7194935B1 (en) * | 2006-05-16 | 2007-03-27 | Hsi-Yung Li | Hexagonal driving tool with pawl piece |
| CN101253025B (en) * | 2005-07-13 | 2012-03-14 | 史特利克乔马有限公司 | Screwdriver for an inner profile screw |
| CN204446088U (en) * | 2014-12-31 | 2015-07-08 | 天津正天医疗器械有限公司 | Device spanner is got for holding in orthopedic spinal nail-stick system |
-
2017
- 2017-07-12 CN CN201710567539.9A patent/CN107242900B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1866996U (en) * | 1962-12-14 | 1963-02-07 | Horst Giel | WRENCH FOR SCREWS WITH HEXAGON SOCKET, CROSS SLOT OD. DGL. |
| CN86201409U (en) * | 1986-03-13 | 1987-04-15 | 杜忠 | Screwdriver with hold and carrying screw |
| GB2389551A (en) * | 2002-06-13 | 2003-12-17 | Martin Philcox | Screwdriver with holding feature for socket screws |
| CA2614779A1 (en) * | 2005-07-13 | 2007-01-18 | Stryker Trauma Gmbh | Screwdriver for an inner profile screw |
| CN101253025B (en) * | 2005-07-13 | 2012-03-14 | 史特利克乔马有限公司 | Screwdriver for an inner profile screw |
| WO2007021850A1 (en) * | 2005-08-12 | 2007-02-22 | Smith & Nephew, Inc. | Fastener retainer and driver |
| US7194935B1 (en) * | 2006-05-16 | 2007-03-27 | Hsi-Yung Li | Hexagonal driving tool with pawl piece |
| CN204446088U (en) * | 2014-12-31 | 2015-07-08 | 天津正天医疗器械有限公司 | Device spanner is got for holding in orthopedic spinal nail-stick system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113181546A (en) * | 2021-04-29 | 2021-07-30 | 曲靖市第一人民医院 | Hemodialysis pipe tip locking structure |
| CN113181546B (en) * | 2021-04-29 | 2022-08-02 | 曲靖市第一人民医院 | Hemodialysis pipe tip locking structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107242900B (en) | 2018-12-21 |
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