CN106236243B - Spanner is limited with the torsion for pre-tightening function - Google Patents
Spanner is limited with the torsion for pre-tightening function Download PDFInfo
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- CN106236243B CN106236243B CN201610788599.9A CN201610788599A CN106236243B CN 106236243 B CN106236243 B CN 106236243B CN 201610788599 A CN201610788599 A CN 201610788599A CN 106236243 B CN106236243 B CN 106236243B
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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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The present invention relates to the field of medical instrument technology, the torsion that especially a kind of band pre-tightens function limits spanner, it include: wrenching bar, trigger, preceding capping, spring, torque arm, handle, torque-force ratchet, butterfly elastic slice and rear end cap, handle successively has the first cavity, the second cavity and third cavity from back to front, torque-force ratchet is arranged in the first cavity, second cavity is the side n shape, and butterfly elastic slice is arranged between torque-force ratchet and rear end cap；Torque arm includes and ratchet part and the side n shape boss portion；Trigger is hollow rod-like structure, and the rear end of trigger has the outer side n shape interconnecting piece compatible with the second cavity, and the outer side n shape interconnecting piece is adapted with the second cavity to be connect；In its natural state, n shape boss portion when shape inner hole is with n is adapted to be connect spanner；Wrenching bar is connect with torque arm by rapid replacing interface, n >=3.Torsion of the invention limits spanner, and can satisfy in surgical procedure makes screw tail portion contact and lock with bone plate in screw placement bone.
Description
Technical field
The present invention relates to the field of medical instrument technology, the torsion that especially a kind of band pre-tightens function limits spanner.
Background technique
Currently, in locking bone fracture plate internal fixation operation, need when being implanted into lock screw with two spanners: one is fixation
Spanner (does not have torsion limitation function), and another handle is torque spanner.That is doctor's back-up wrench pedicle screw, will with torque spanner
Screw and bone plate are locked.Spanner is needed replacing when surgical operation, after doctor is fixed with back-up wrench sometimes, is forgotten with torsion
Torque wrench and directly locked with fixed wrench, nail is taken out into difficult risk after causing bone to heal.
Summary of the invention
The purpose of the present invention is for two spanners are needed in prior art surgical procedure, and complicated for operation, tool is risky to ask
Topic, and the torsion limitation spanner that a kind of band pre-tightens function is provided, so that one is implanted into spanner while being able to solve in surgical procedure
Screw and with bone plate lock, simplify surgical procedure, shorten operating time.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of band pre-tightens the torsion limitation spanner of function characterized by comprising wrenching bar, trigger, preceding capping, bullet
Spring, torque arm, handle, torque-force ratchet, butterfly elastic slice and rear end cap, the rear end of the handle is arranged in the rear end cap, described
Handle successively has the first cavity, the second cavity and third cavity from back to front, and the torque-force ratchet is arranged in first chamber
In vivo, there is groove on first cavity, there is on the torque-force ratchet boss corresponding with the groove, described second
Cavity is the side n shape, and the butterfly elastic slice is arranged between the torque-force ratchet and rear end cap；The torque-force ratchet and butterfly elastic slice
It is set on the torque arm；The torque arm includes the ratchet part being meshed with the torque-force ratchet and is arranged in the torsion
The side the n shape boss portion of power bar front；The trigger is hollow rod-like structure, and the rear end of the trigger has and described second
The compatible outer side the n shape interconnecting piece of cavity, the outer side the n shape interconnecting piece is adapted with second cavity to be connect, the outer side n
The inside of shape interconnecting piece has the side n shape inner hole and the 4th cavity；The torsion limits spanner in its natural state, the side n shape
Inner hole is adapted with the side the n shape boss portion and connect；The trigger further includes shoulder block, spring setting the shoulder block with
Between the rear wall of the third cavity；It passes through in the wrenching bar slave flipflop and is connect with the torque arm by rapid replacing interface；
Wherein, n >=3.
Further, the preceding capping is connected to the front end of the handle.
Further, the number of teeth of the ratchet part is n.
Further, n=8.
Further, the first washer is additionally provided between the rear end cap and butterfly elastic slice, it is described
Second packing ring is additionally provided between torque-force ratchet and the butterfly elastic slice.
Further, the rear end of the torque arm is extend into the rear end cap.
Further, bushing is additionally provided between the torque-force ratchet and the first cavity antetheca.
Compared with prior art, the beneficial effects of the present invention are:
When operation, rotating handle first passes through wrenching bar for the lockhole that screw passes through bone plate and screws in bone, at this point, torsion
Bar and trigger are rotated coaxially with handle, are equivalent to a back-up wrench；Continue after the front end of trigger touches bone plate
Screw is screwed in, trigger is gradually moved back with respect to wrenching bar, the shape boss while n of trigger is in the n of shape inner hole disengaging torque arm
Portion and enter the 4th cavity, the side n shape boss portion can be freely rotated in the 4th cavity, the torsion of band preload function of the invention at this time
Power limit spanner can realize torsion limitation function, be equivalent to a torque spanner, i.e. handle drives torque-force ratchet synchronous rotary, turn round
Power ratchet is limited the size of pretightning force by butterfly elastic slice, works as butterfly by driving torque arm rotation with the ratchet engagement of torque arm
When the torsion of shape elastic slice reaches certain value, torque-force ratchet and torque arm is forced to skid, to realize the lock to screw and bone plate
Tightly.Doctor need to only use the Wrench of the invention that the implantation to screw and the locking work with bone plate can be realized during operation
Make, it is easy to operate, shorten operating time, and reduce operation risk.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is explosive view of the embodiment of the present invention；
Fig. 2 is structural schematic diagram of the embodiment of the present invention；
Fig. 3 is A-A cross-sectional view in Fig. 2；
In figure, 1, wrenching bar, 2, trigger, 21, the outer side n shape interconnecting piece, 22, the side n shape inner hole, the 23, the 4th cavity, 24,
Shoulder block, 3, preceding capping, 4, spring, 5, bushing, 6, torque arm, 61, the side n shape boss portion, 7, handle, the 71, first cavity, 72,
Two cavitys, 73, third cavity, 74, groove, 8, torque-force ratchet, 81, boss, 9, second packing ring, 10, butterfly elastic slice, 11, first
Washer, 12, rear end cap.
Specific embodiment
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
In the description of the present invention, it is to be understood that, term " radial direction ", " axial direction ", "upper", "lower", "top", "bottom",
The orientation or positional relationship of the instructions such as "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of retouching
It states the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.In the description of the present invention, unless otherwise indicated,
The meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Set ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
It, can also be indirectly connected through an intermediary to be to be connected directly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
The torsion that band as shown in FIG. 1 to FIG. 3 pre-tightens function limits spanner, comprising: wrenching bar 1, trigger 2, preceding capping 3,
The rear end of handle 7 is arranged in spring 4, torque arm 6, handle 7, torque-force ratchet 8, butterfly elastic slice 10 and rear end cap 12, rear end cap 12,
Handle 7 successively has the first cavity 71, the second cavity 72 and third cavity 73 from back to front, and torque-force ratchet 8 is arranged in the first chamber
In body 71, there is groove 74 on the first cavity 71, there is boss 81 corresponding with groove 74, the second cavity on torque-force ratchet 8
72 be the side n shape, and butterfly elastic slice 10 is arranged between torque-force ratchet 8 and rear end cap 12；Torque-force ratchet 8 and butterfly elastic slice 10 are arranged
On torque arm 6, the rear end of torque arm 6 is extend into rear end cap 12；Torque arm 6 includes the ratchet being meshed with torque-force ratchet 8
Portion and the side the n shape boss portion 61 that 6 front of torque arm is set；Trigger 2 is hollow rod-like structure, and the rear end of trigger 2 has
The outer side n shape interconnecting piece 21 compatible with the second cavity 72, the outer side n shape interconnecting piece 21 is adapted with the second cavity 72 to be connect, outer n
Shape inner hole 22 and the 4th cavity 23 when the inside of shape interconnecting piece 21 has n；Torsion limits spanner in its natural state, the side n shape
Inner hole 22 is adapted with the side n shape boss portion 61 and connect；Trigger 2 further includes shoulder block 24, and spring 4 is arranged in shoulder block 24 and third chamber
Between the rear wall of body 73；It passes through in 1 slave flipflop 2 of wrenching bar and is connect with torque arm 6 by rapid replacing interface.Wherein n >=3.
As a preferred embodiment, choosing n=8.
In the present embodiment, the front end of handle 7 is additionally provided with the preceding capping 3 sealed.
In the present embodiment, bushing 5 is additionally provided with before torque-force ratchet 8 and 71 antetheca of the first cavity.
As a preferred embodiment, being additionally provided with the first washer 11 between rear end cap 12 and butterfly elastic slice 10, turn round
Second packing ring 9 is additionally provided between power ratchet 8 and the butterfly elastic slice 10.
Specifically, have the torsion limitation spanner for pre-tightening function when as back-up wrench state, the side the n shape of torque arm 6
The side the n shape inner hole 22 of boss portion 61 and trigger 2 connects, and the outer side the n shape of the second cavity 72 and trigger 2 of handle 7 connects
Socket part 21 connects, and handle 7, trigger 2 and torque arm 6 do not have relative rotation；When operation, first by being connected to torque arm 6
The wrenching bar 1 of end screws in screw into bone plate, and as screw slowly enters bone plate, trigger 2 is contacted with bone plate, and
It is pressed on bone plate, 2 relative torque forces bar 6 of trigger slowly moves back, until the side the n shape boss portion 61 and trigger 2 of torque arm 6
The side n shape inner hole 22 be detached from, the side n shape boss portion 61 enter the 4th cavity 23, can be freely rotated in the 4th cavity 23, turn round at this time
Power bar 6 and trigger 2 are detached from, and torque arm 6 with 2 synchronous rotary of trigger, does not continue rotating handle 7, and torque-force ratchet 8 passes through ratchet
Engagement drives torque arm 6 to rotate, and the spanner of the present embodiment is equivalent to torque spanner start-up operation at this time, locks to screw.
The spanner of the present embodiment is equivalent to working principle when torque spanner work are as follows: with the torque value of butterfly elastic slice 10
It is continuously increased, torque-force ratchet 8 and torque arm 6 skid when final, then it represents that screw has reached preset coupling mechanism force.
After the completion of screw locking, the torsion limitation spanner of the present embodiment, under the action of spring 4, the side n shape boss are removed
Portion 61 comes back in the side the n shape inner hole 22 of trigger 2, is restored to nature with the torsion limitation spanner for pre-tightening function.
Above-mentioned desirable embodiment according to the present invention is enlightenment, and through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention'.This invention it is technical
Range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (7)
1. the torsion that a kind of band pre-tightens function limits spanner characterized by comprising wrenching bar (1), trigger (2), preceding capping
(3), spring (4), torque arm (6), handle (7), torque-force ratchet (8), butterfly elastic slice (10) and rear end cap (12), the rear end cap
(12) setting successively has the first cavity (71), the second cavity in the rear end of the handle (7), the handle (7) from back to front
(72) and third cavity (73), torque-force ratchet (8) setting is in first cavity (71), on first cavity (71)
With groove (74), there is boss (81) corresponding with the groove (74), second cavity on the torque-force ratchet (8)
It (72) is the side n shape, the butterfly elastic slice (10) is arranged between the torque-force ratchet (8) and rear end cap (12)；The torsion spine
Wheel (8) and butterfly elastic slice (10) are set on the torque arm (6)；The torque arm (6) includes and the torque-force ratchet (8)
N side shape boss portion (61) of the ratchet part being meshed with setting in the torque arm (6) front；The trigger (2) is hollow
The rear end of rod-like structure, the trigger (2) has with second cavity (72) the compatible outer side n shape interconnecting piece (21),
The outer side the n shape interconnecting piece (21) is adapted with second cavity (72) to be connect, the inside of the outer side the n shape interconnecting piece (21)
With the side n shape inner hole (22) and the 4th cavity (23)；The torsion limits spanner in its natural state, the side the n shape inner hole
(22) it is adapted and connect with the side the n shape boss portion (61)；The trigger (2) further includes shoulder block (24), and the spring (4) sets
It sets between the shoulder block (24) and the rear wall of the third cavity (73)；In wrenching bar (1) slave flipflop (2) pass through with
The torque arm (6) is connected by rapid replacing interface；Wherein, n >=3.
2. the torsion that band according to claim 1 pre-tightens function limits spanner, which is characterized in that capping (3) connects before described
Connect the front end in the handle (7).
3. the torsion that band according to claim 1 pre-tightens function limits spanner, which is characterized in that the number of teeth of the ratchet part
For n.
4. the torsion that band according to claim 1 or 3 pre-tightens function limits spanner, which is characterized in that n=8.
5. the torsion that band according to claim 1 pre-tightens function limits spanner, which is characterized in that the rear end cap (12) with
Be additionally provided with the first washer (11) between the butterfly elastic slice (10), the torque-force ratchet (8) and the butterfly elastic slice (10) it
Between be additionally provided with second packing ring (9).
6. the torsion that band according to claim 1 pre-tightens function limits spanner, which is characterized in that the torque arm (6)
Rear end is extend into the rear end cap (12).
7. the torsion that band according to claim 1 pre-tightens function limits spanner, which is characterized in that the torque-force ratchet (8)
Bushing (5) are provided between the antetheca of first cavity (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610788599.9A CN106236243B (en) | 2016-08-31 | 2016-08-31 | Spanner is limited with the torsion for pre-tightening function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610788599.9A CN106236243B (en) | 2016-08-31 | 2016-08-31 | Spanner is limited with the torsion for pre-tightening function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106236243A CN106236243A (en) | 2016-12-21 |
| CN106236243B true CN106236243B (en) | 2019-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610788599.9A Active CN106236243B (en) | 2016-08-31 | 2016-08-31 | Spanner is limited with the torsion for pre-tightening function |
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| Country | Link |
|---|---|
| CN (1) | CN106236243B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201029928Y (en) * | 2006-07-05 | 2008-03-05 | 叶启彬 | Reversible spanner for bone surgery |
| CN201342648Y (en) * | 2009-02-25 | 2009-11-11 | 天地科技股份有限公司 | Prestressed anchor bar anti-torsion torque-increasing wrench |
| CN206543204U (en) * | 2016-08-31 | 2017-10-10 | 创生医疗器械（中国）有限公司 | Torsion limitation spanner with pretension function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9358672B2 (en) * | 2010-05-18 | 2016-06-07 | Gauthier Biomedical, Inc. | Electronic torque wrench |
-
2016
- 2016-08-31 CN CN201610788599.9A patent/CN106236243B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201029928Y (en) * | 2006-07-05 | 2008-03-05 | 叶启彬 | Reversible spanner for bone surgery |
| CN201342648Y (en) * | 2009-02-25 | 2009-11-11 | 天地科技股份有限公司 | Prestressed anchor bar anti-torsion torque-increasing wrench |
| CN206543204U (en) * | 2016-08-31 | 2017-10-10 | 创生医疗器械（中国）有限公司 | Torsion limitation spanner with pretension function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106236243A (en) | 2016-12-21 |
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