CN110179507A - Cervical vertebra device for spreading - Google Patents
Cervical vertebra device for spreading Download PDFInfo
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- CN110179507A CN110179507A CN201910363632.7A CN201910363632A CN110179507A CN 110179507 A CN110179507 A CN 110179507A CN 201910363632 A CN201910363632 A CN 201910363632A CN 110179507 A CN110179507 A CN 110179507A
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- 230000000399 orthopedic effect Effects 0.000 abstract description 3
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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
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
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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
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
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Abstract
The present invention proposes a kind of cervical vertebra device for spreading, belong to Orthopedic correction technical field, the cervical vertebra device for spreading includes supporting guide, first adjusts unit, first struts part, first supporting element and second strut part, the first adjusting unit is connect with the supporting guide, first struts part, described first struts part connect with the first adjusting unit, first supporting element is fixedly connected with the first adjusting unit, described second struts part connect with first supporting element, along being parallel on the direction of the supporting guide, described second strut part with described first strut part be arranged side by side.A possibility that present invention decreases generation screw cutting centrum phenomenons, and then improve the success rate of cervical vertebra correcting operation.
Description
Technical field
The invention belongs to Orthopedic correction technical field more particularly to a kind of cervical vertebra device for spreading.
Background technique
Cervical vertebra expander is that a kind of common instrument plays in Orthopedic correction operation and struts cervical vertebral body in operation
Effect.
Existing cervical vertebra expander includes rack gear, position regulating unit and casing, position regulating unit (including adjusting block,
Gear set, stop tab and strut arm) be two groups, two groups of position regulating units are connect with rack gear, in the direction along rack gear
On relatively move (close to each other or be located remotely from each other), casing is two, two casings and two groups of one a pair of position regulating units
It should connect.When needing to strut cervical vertebral body, epicentral screw is entangled by casing, then passes through mobile sleeve belt
Dynamic centrum is mobile, is realized with this and is strutted to cervical vertebral body.
But present inventor during inventive technique scheme, has found above-mentioned technology extremely in realizing the embodiment of the present application
It has the following technical problems less:
Existing cervical vertebra expander since the pressure for needing to overcome is larger, thus is easy to appear during strutting centrum
Screw cuts the phenomenon that centrum, and then increases operation risk.
Summary of the invention
The embodiment of the present application solves by providing a kind of cervical vertebra device for spreading and is easy to appear screw cutting in the prior art
The technical issues of centrum phenomenon, reduces a possibility that screw cutting centrum phenomenon occurs, and then improves cervical vertebra correcting operation
Success rate.
The embodiment of the present application provides a kind of cervical vertebra device for spreading, comprising:
Supporting guide；
First adjusts unit, and the first adjusting unit is connect with the supporting guide；
First struts part, and described first struts part connect with the first adjusting unit；
First supporting element, first supporting element are fixedly connected with the first adjusting unit；And
Second struts part, and described second struts part connect with first supporting element, along be parallel to it is described support lead
On the direction of rail, described second strut part with described first strut part be arranged side by side.
One or more technical solution provided in the present invention, has at least the following technical effects or advantages:
Cervical vertebra device for spreading of the present invention struts part, the first supporting element by setting first and second struts part, to cervical vertebra
During cone progress is distracted, two screws of affected part side can be attached simultaneously, simultaneously to affected part side
Two cones are strutted, so that compared with the existing technology, the distracting force that an original cone is born is applied to two cones
On, the pressure that dilator needs to overcome is reduced, solves the technology for being easy to appear screw cutting centrum phenomenon in the prior art
Problem, and then a possibility that screw cutting centrum phenomenon occurs is reduced, more and then improve the success rate that cervical vertebra correcting is performed the operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cervical vertebra device for spreading of the present invention in one embodiment；
Fig. 2 is structural schematic diagram of the cervical vertebra device for spreading under another visual angle in Fig. 1；
Fig. 3 is the structural schematic diagram of supporting guide in Fig. 1；
Fig. 4 is the structural schematic diagram of cervical vertebra device for spreading of the present invention in another embodiment；
Fig. 5 is that cervical vertebra device for spreading struts post exercise structural schematic diagram in Fig. 4；
In above each figure: 10, supporting guide；20, first unit is adjusted；21, the first sliding block；22, first gear group；23,
First stop tab；24, the first support arm；30, first part is strutted；31, sleeve part；32, interconnecting piece；40, the first supporting element；50,
Second struts part；60, first movement part；70, second unit is adjusted；71, the second sliding block；72, second gear group；73, second stops
Baffle；74, the second support arm；80, third struts part；90, the second supporting element；100, the 4th part is strutted；110, the second moving member.
Specific embodiment
In the following, the present invention is specifically described by illustrative embodiment.It should be appreciated, however, that not into one
In the case where step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiments
In.
In the description of the present invention, it should be understood that (1) term "inner", "outside", "upper", "lower", "front", "rear" etc.
The orientation or positional relationship of instruction is positional relationship based on the figure, is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention；(2) when element is referred to as " being fixed on " or " being supported in " another element, it can
With directly on the other element, or there may also be elements placed in the middle；(3) when an element is considered as that " connection " is another
A element, it can be directly to another element or may be simultaneously present centering elements；(4) term " first ", "
Two ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
It is solution technology that the present invention, which applies the technical solution in example, and general thought is as follows:
The present invention proposes a kind of cervical vertebra device for spreading, for driving bolt mobile, with realization pair in cervical vertebra correcting operation
Cervical vertebral body struts, in order to solve to be easy to appear the technical issues of screw cuts centrum phenomenon, cervical vertebra support in the prior art
Opening apparatus improves the prior art, sets two for the quantity of the casing in a position regulating unit, i.e. the cervical vertebra
Device for spreading includes supporting guide, the first adjusting unit, first struts part, the first supporting element and second strut part, and first is adjusted
Unit is connect with supporting guide, and first struts part connect with the first adjusting unit, and the first supporting element is fixed with the first adjusting unit
Connection, second struts part connect with the first supporting element, and on along the direction for being parallel to supporting guide, second struts part and first
Part is strutted to be arranged side by side.
Based on above-mentioned, cervical vertebra device for spreading of the present invention, part, the first supporting element are strutted by setting first and second strutted
Part can simultaneously be attached two screws of affected part side, during carrying out distracted to cervical vertebra cone with right simultaneously
Two cones of affected part side are strutted, so that compared with the existing technology, the distracting force that an original cone is born applies
Onto two cones, the pressure that dilator needs to overcome is reduced, solves and is easy to appear screw cutting centrum in the prior art
The technical issues of phenomenon, and then a possibility that screw cutting centrum phenomenon occurs is reduced, more and then improve cervical vertebra correcting hand
The success rate of art.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Embodiment one
It is the structural schematic diagram of cervical vertebra device for spreading of the present invention in one embodiment referring to Fig. 1 to Fig. 3.This hair
Bright cervical vertebra device for spreading is used in cervical vertebra correcting operation, is driven bolt mobile, is strutted with realizing to cervical vertebral body, the cervical vertebra
Device for spreading includes that supporting guide 10, first adjusts unit 20, first struts part 30, the first supporting element 40 and second strut part
50。
Supporting guide 10 is convenient for adjusting the relative position for strutting part and screw for being supported other component,
Realize the accurate connection to screw.Specifically, as depicted in figs. 1 and 2, supporting guide 10 is rack shape, 10 edge of supporting guide
Arc direction extend, in contrast in the prior art, the physiology curvature of human cervical spine can be better adapted to, so that screw
Cervical vertebra is fixed and is strutted with stable posture, and then improves the success rate of cone corrective procedure, wherein as shown in figure 3,
Supporting guide 10 is preferably arc-shaped, meanwhile, if the radius of supporting guide 10 is r, and set the central angle of supporting guide 10 as ɑ,
Then 260mm≤r≤360mm, 60 °≤ɑ≤160 °.
First adjusting unit 20 is connect with supporting guide 10, and to move back and forth along supporting guide 10, first adjusts unit
20 for driving first to strut part 30 and second to strut part 50 mobile so that first strut part 30 and second strut part 50 can
Its corresponding screw accurately connects.Specifically, as depicted in figs. 1 and 2, first adjust unit 20 include the first sliding block 21,
First gear group 22, the first stop tab 23 and the first support arm 24, the first sliding block 21 correspond to supporting guide 10 and are set as arc,
First sliding block 21 is slidably connected with supporting guide 10, to move back and forth along supporting guide 10, to realize that first is adjusted
The adjustability of 20 position of unit, and then realize that first struts part 30 and second strut the adjustability of 50 position of part；First sliding block 21
For arc hollow sleeve-shaped, the first sliding block 21 is socketed on the outside of supporting guide 10, to reciprocatingly slide along supporting guide 10, together
When, the physiology curvature that drive screw complies with human cervical spine does the switching action of position and angle；First gear group 22 passes through one
The modes such as chemical conversion type or welding are fixedly installed on the first sliding block 21, and first gear group 22 and the tooth-strip part of supporting guide 10 are nibbled
Transmission is closed, to drive the first sliding block 21 to move on supporting guide 10 by the rotation of gear；First stop tab 23 is articulated with
On one sliding block 2, the first stop tab 23 is contacted with the tooth-strip part of supporting guide 10, to realize according to the cooperation principle of ratchet ratchet
Unidirectional (the strutting direction) of first sliding block 2 is mobile；One end of first support arm 24 is fixedly connected with the first sliding block 21, with
First sliding block, 21 synchronizing moving, the other end of the first support arm 24 struts part 30 with the first supporting element 40 and first and connect, with band
Dynamic first supporting element 40 and first strut 30 synchronizing moving of part.
First struts part 30 connect with the first adjusting unit 20, and to be adjusted the support of unit 20 by first, first struts part
30 with screw for connecting, and to drive screw mobile, and then realizes the movement of cervical vertebral body.Specifically, such as Fig. 1 and Fig. 2 institute
Show, first, which struts part 30, includes sleeve part 31 and interconnecting piece 32, and sleeve part 31 is hollow cylindrical, and sleeve part 31 is for being socketed spiral shell
Nail, to drive screw mobile, one end of interconnecting piece 32 is fixedly connected with sleeve part 31, and the other end of interconnecting piece 32 is preferably and the
One support arm 24 rotation connection, so that first struts part 30 while with the first 24 synchronizing moving of support arm, additionally it is possible to
It is rotated relative to the first support arm 24, so as to preferably adjust the first relative position for strutting part 30 Yu screw, Jin Erti
High first struts the accuracy connected between part 30 and screw, avoid because first strut 30 position of part it is improper due to there is stress concentration
The phenomenon that；Further as depicted in figs. 1 and 2, interconnecting piece 32 and the first support arm 24 are hinged, interconnecting piece 32 and the first support arm 24
Shaft it is parallel with the first supporting element 40.Certainly, in other embodiments, first strut part 30 and pass through with the first support arm 24
It the modes such as welds or is bolted to be fixedly connected.
First supporting element 40 with first adjusting unit 20 be fixedly connected, with by first adjust unit 20 support, first
Support member 40 is used to support second and struts part 50.Specifically, as depicted in figs. 1 and 2, the first supporting element 40 is rounded rod-shaped, the
One supporting element 40 extends along rectilinear direction；In order to improve the accuracy connecting with two screws of affected part side, neck of the present invention
Vertebra device for spreading further includes first movement part 60, and first movement part 60 and the first supporting element 40 are cooperatively connected, in the first support
It is moved on part 40, first movement part 60 struts part 50 with second and connect, and is synchronized with driving second to strut part 50 along rectilinear direction
It is mobile, so that realization second struts part 50 and first and struts the adjusting of relative position between part 30, it can be according to affected part side
Different spacing between two screws, adjust second and strut part 50 and first and strut relative position between part 30, and then can be improved
The accuracy connecting with two screws of affected part side, further decreases the phenomenon that stress is concentrated；Further such as Fig. 1 and figure
Shown in 2, the first supporting element 40 has the first external screw thread, and first movement part 60 is hollow sleeve-shaped, and first movement part 60 has
First internal screw thread, first movement part 60 are sheathed on the outside of the first supporting element 40, and the first internal screw thread is matched with the first external screw thread,
In use, realizing reciprocating movement of the first movement part 60 on the first supporting element 40, Jin Ershi by rotation first movement part 60
The adjusting of the existing position on the first supporting element 40 of first movement part 60.
Second struts part 50 connect with the first supporting element 40, with by the support of the first supporting element 40, along being parallel to
On the direction of one supporting element 40, second strut part 50 and first strut part 30 be arranged side by side.Specifically, such as Fig. 1 and Fig. 2 institute
Show, second struts part 50 and the rotation connection of first movement part 60, while with first movement 60 synchronizing moving of part, moreover it is possible to
It is enough to be rotated relative to first movement part 60, so as to preferably adjust the second relative position for strutting part 50 Yu screw, in turn
Improve and second strut the accuracy connected between part 50 and screw, avoid because second strut 50 position of part it is improper due to there is stress collection
In phenomenon；The structure for strutting part 50 for second, and its specific connection type with first movement part 60, reference can be made to above-mentioned
One struts part 30 and first struts specific connection type between part 30 and the first support arm 24, and this will not be repeated here by the present invention.
Certainly, in other embodiments, second strut part 50 can also with first movement part 60 by welding or be bolted
Mode is fixedly connected.
Based on above-mentioned, the present invention at least have the following technical effects or advantages:
Cervical vertebra device for spreading of the present invention struts part 30, the first supporting element 40 by setting first and second struts part 50,
During distracted to the progress of cervical vertebra cone, two screws of affected part side can be attached simultaneously, simultaneously to affected part
Two cones of side are strutted, so that compared with the existing technology, the distracting force that an original cone is born is applied to two
In a cone, the pressure that dilator needs to overcome is reduced, solves and is easy to appear screw cutting centrum phenomenon in the prior art
The technical issues of, and then a possibility that screw cutting centrum phenomenon occurs is reduced, more and then improve cervical vertebra correcting operation
Success rate.
In order to the screw for realizing to affected part two sides play the role of stablizing it is distracted, to further avoid occurring screw cutting
The phenomenon that centrum, the present invention further improve the prior art, and the casing quantity in another position regulating unit is set
Two are set to, during carrying out distracted to cervical vertebra cone, two screws of the affected part other side can be attached simultaneously,
With simultaneously to the cone of affected part two sides carry out it is stable strut, thus compared with the existing technology, an original cone is born
Distracting force is applied in two cones, further reduces the pressure that dilator needs to overcome, preferably solves the prior art
In be easy to appear screw cutting centrum phenomenon the technical issues of, and then further reduce occur screw cutting centrum phenomenon can
Energy property more and then further improves the success rate of cervical vertebra correcting operation.It is described as follows:
With continued reference to Fig. 1 and Fig. 2, cervical vertebra device for spreading of the present invention further include the second adjusting unit 70, third strut part 80,
Second supporting element 90 and the 4th struts part 100.Wherein:
Second adjusting unit 70 is connect with supporting guide 10, and to move back and forth along supporting guide 10, second adjusts unit
70 third struts part 80 and the 4th to strut part 100 mobile for driving, so that third, which struts part 80 and the 4th, struts 100 energy of part
Enough its corresponding screws accurately connect, and on the direction along supporting guide 10, second, which adjusts unit 70 and first, adjusts list
Member 20 is arranged side by side.Specifically, as depicted in figs. 1 and 2, second, which adjusts unit 70, includes the second sliding block 71, second gear group
72, the second stop tab 73 and the second support arm 74, it is arc-shaped that the second sliding block 71 corresponds to supporting guide 10, the second sliding block 71 with
Supporting guide 10 is slidably connected, to move back and forth along supporting guide 10, to realize that second adjusts 70 position of unit
Adjustability, and then realize that third struts part 80 and the 4th struts the adjustability of 100 position of part；Second sliding block 71 is arc hollow set
Tubular, the second sliding block 71 are socketed on the outside of supporting guide 10, to reciprocatingly slide along supporting guide 10；Second gear group 72 with
The tooth-strip part engaged transmission of supporting guide 10, to drive the second sliding block 71 to move on supporting guide 10 by the rotation of gear；
Second stop tab 73 is articulated on the second sliding block 71, and the second stop tab 73 is contacted with the tooth-strip part of supporting guide 10, according to spine
The cooperation principle of ratchet is taken turns, realizes that unidirectional (the strutting direction) of the second sliding block 71 is mobile；One end of second support arm 74 with
Second sliding block 71 is fixedly connected, with 21 synchronizing moving of the first sliding block, the other end and the second supporting element of the second support arm 74
90 and third strut the connection of part 80, to drive the second supporting element 90 and third to strut 80 synchronizing moving of part.
Third struts part 80 and connect with the second adjusting unit 70, to be adjusted the support of unit 70 by second, along parallel
In on the direction of the second supporting element 90, third struts part 80 and first and struts part 30 and be arranged side by side.Specifically, third struts part
80 and second adjust the rotation connection of unit 70, while adjusting 70 synchronizing moving of unit with second, additionally it is possible to relative to
Second, which adjusts unit 70, rotates, so as to preferably adjust the relative position that third struts part 80 Yu screw, and then raising the
Three strut the accuracy connected between part 80 and screw, avoid because third strut 80 position of part it is improper due to occur stress concentration show
As.The structure of part 80, and its connection type for adjusting unit 70 with second are strutted for third, are referred to above-mentioned first and are strutted part
30, and its connection type for adjusting unit 20 with first, this will not be repeated here by the present invention.
Second supporting element 90 with second adjusting unit 70 be fixedly connected, with by second adjust unit 70 support, second
Support member 90 is used to support the 4th and struts part 100.Specifically, as depicted in figs. 1 and 2, the second supporting element 90 is rounded rod-shaped, the
Two supporting elements 90 are parallel with the first supporting element 40, and the second supporting element 90 and the first supporting element 40 are coaxial；In order to improve and affected part one
The accuracy of two screws connection of side, cervical vertebra device for spreading of the present invention further includes the second moving member 110, the second moving member 110
It is cooperatively connected with the second supporting element 90, to move on the second supporting element 90, the moving direction of the second moving member 110 is to be parallel to
The direction of second supporting element 90, the second moving member 110 strut part 100 with the 4th and connect, to drive the 4th to strut part 100 along flat
Row is in the direction synchronizing moving of the second supporting element 90, so that realization the 4th struts part 100 and third struts relative position between part 80
Adjusting, can adjust the 4th according to the different spacing between two screws of affected part side and strut part 100 and third struts part
Relative position between 80, and then can be improved the accuracy connecting with two screws of affected part side, further decrease stress collection
In phenomenon occur；Further as depicted in figs. 1 and 2, the second supporting element 90 has the second external screw thread, and the second moving member 110 is
Hollow sleeve-shaped, the second moving member 110 have the second internal screw thread, and the second moving member 110 is sheathed on the outer of the second supporting element 90
Portion, the second internal screw thread are matched with the second external screw thread, in use, realizing the second moving member by the second moving member 110 of rotation
110 reciprocating movement on the second supporting element 90, and then realize the tune of the second moving member 110 position on the second supporting element 90
Section.
4th struts part 100 connect with the second supporting element 90, with by the support of the second supporting element 90, along being parallel to
On the direction of two supporting elements 90, the 4th struts part 100 and third struts part 80 and is arranged side by side.Specifically, such as Fig. 1 and Fig. 2 institute
Show, the 4th, which struts part 100 and the second moving member 110, is rotatablely connected, with while with the second 110 synchronizing moving of moving member,
It can also be rotated relative to the second moving member 110, so as to preferably adjust the 4th opposite position for strutting part 100 Yu screw
Set, and then improve and the 4th strut the accuracy connected between part 100 and screw, avoid because the 4th strut 100 position of part it is improper due to
There is the phenomenon that stress is concentrated.The structure for strutting part 100 for the 4th, and its specific connection type with the second moving member 110,
Reference can be made to above-mentioned first struts part 30 and first struts specific connection type between part 30 and the first support arm 24, the present invention
This will not be repeated here.Certainly, in other embodiments, the 4th strut part 100 and can also pass through welding with the second moving member 110
Or it the modes such as is bolted and is fixedly connected.
Based on above-mentioned, the present invention at least have the following technical effects or advantages:
Cervical vertebra device for spreading of the present invention, setting first strut part 30, the first supporting element 40 and second strut part 50 base
On plinth, third struts part 80, the second supporting element 90 and the 4th struts part 100 for setting, is carrying out distracted process to cervical vertebra cone
In, two screws for being located at the every side in affected part can be attached, to be strutted simultaneously to two groups of screws, thus relative to
The prior art further realizes the distracting force for bearing an original cone, is applied in two cones, further reduces support
The pressure that device needs to overcome is opened, preferably solves the technical issues of being easy to appear screw cutting centrum phenomenon in the prior art,
And then a possibility that screw cutting centrum phenomenon occurs is further reduced, more and then further improve cervical vertebra correcting operation
Success rate.
In addition, cervical vertebra device for spreading of the present invention, is being supported by the first adjusting unit 20 of setting and the second adjusting unit 70
Position on guide rail 10 is adjustable, that is, being arranged first to adjust unit 20 includes the first sliding block 21, and the first sliding block 21 is led with support
Rail 10 is slidably connected, meanwhile, it includes the second sliding block 72, the second sliding block 72 and supporting guide 10 that setting second, which adjusts unit 70,
Sliding connection is conducive to doctor according to practical need so as to improve the flexibility that cone struts position and stress is adjusted
It wants, flexible choice suitably struts position and struts dynamics, and then is conducive to improve the efficiency of cervical vertebra correcting operation.
Illustrate the present invention in order to clearer, below with regard to cone support in the present invention by taking Fig. 1 and embodiment shown in Fig. 2 as an example
The operating process opened is illustrated:
When operation, the drivescrew first on each two pieces of centrums in affected part two sides.First gear group 22 is rotated, the first support is adjusted
The rotational angle of part 30 is opened, so that first struts part 30 and entangle screw, first movement part 60 is rotated, struts part 50 to adjust second
Position, the second rotational angle for strutting part 60 is adjusted, so that second struts part 60 and entangle screw；
Similarly, it adjusts third to strut part 80 and the 4th strut position and the rotational angle of part 100, it is made to entangle corresponding spiral shell
Nail.
First gear group 22 and second gear group 72 are rotated, to apply distracting force to affected part two sides cone, until completing support
It opens.
Embodiment two
Referring to fig. 4 and Fig. 5, the difference is that, the present embodiment sets supporting guide 10 to linearly with embodiment one,
I.e. supporting guide 10 is along linear extension.
At this point, as shown in Figure 4 and Figure 5, supporting guide 10 is in rack shape, and the first sliding block 21 and the second sliding block 71 are tetragonous
Cylindrical hollow sleeve-shaped, the first supporting element 40 and the second supporting element 90 are parallel with supporting guide 10, the shifting of first movement part 60
Dynamic direction is the direction for being parallel to supporting guide 10, and first movement part 60 struts part 50 with second and connect, to drive second to strut
Part 50 is along the direction synchronizing moving for being parallel to supporting guide 10.
Certainly, as a kind of interchangeable embodiment, first gear group 22 can be replaced turbine group, at this point, support is led
Rail 10 is worm screw, turbine group and worm screw engaged transmission, so that the first moving along worm screw of sliding block 21 is realized, simultaneously because turbine
Latching characteristics between worm screw can guarantee the unidirectional movement of the first sliding block 21 there is no need to which the first stop tab 23 is arranged.In addition,
First adjusting unit 20 can also be fixedly connected with supporting guide 10；Similarly, second gear group 72 can be replaced turbine group, this
When, supporting guide 10 is worm screw, turbine group and worm screw engaged transmission, to realize the second moving along worm screw of sliding block 71, together
When due to the latching characteristics between turbine and worm, there is no need to which the second stop tab 73 is arranged, that is, can guarantee the unidirectional of the second sliding block 71
It is mobile.
Claims (10)
1. a kind of cervical vertebra device for spreading, which is characterized in that the cervical vertebra device for spreading includes:
Supporting guide；
First adjusts unit, and the first adjusting unit is connect with the supporting guide；
First struts part, and described first struts part connect with the first adjusting unit；
First supporting element, first supporting element are fixedly connected with the first adjusting unit；And
Second struts part, and described second struts part connect with first supporting element, along being parallel to the supporting guide
On direction, described second strut part with described first strut part be arranged side by side.
2. cervical vertebra device for spreading according to claim 1, which is characterized in that the cervical vertebra device for spreading further include:
First movement part, the first movement part and first supporting element are cooperatively connected, the first movement part and described the
Two strut part connection；
First supporting element be it is rod-shaped, first supporting element have the first external screw thread, the first movement part be it is hollow
Sleeve-shaped, the first movement part have the first internal screw thread, and the first movement part is sheathed on the outside of first supporting element,
First internal screw thread is matched with first external screw thread.
3. cervical vertebra device for spreading according to claim 2, which is characterized in that described second struts part and the first movement
Part rotation connection.
4. cervical vertebra device for spreading according to any one of claim 1-3, which is characterized in that described first struts part and institute
State the connection of the first adjusting unit rotational.
5. cervical vertebra device for spreading described in any one of -4 according to claim 1, which is characterized in that the cervical vertebra device for spreading is also
Include:
Second adjusts unit, and the second adjusting unit is connect with the supporting guide, in the direction along the supporting guide
On, described second adjusts unit is arranged side by side with the first adjusting unit；
Third struts part, and the third struts part and connect with the second adjusting unit, is supporting along being parallel to described first
On the direction of part, the third strut part with described first strut part be arranged side by side；
Second supporting element, second supporting element are fixedly connected with the second adjusting unit；And
4th struts part, and the described 4th struts part connect with second supporting element, along being parallel to first supporting element
Direction on, the described 4th struts part and the third struts part and is arranged side by side.
6. cervical vertebra device for spreading according to claim 5, which is characterized in that the cervical vertebra device for spreading further include:
Second moving member, second moving member and second supporting element are cooperatively connected, the mobile side of second moving member
To the direction to be parallel to first supporting element, second moving member struts part with the described 4th and connect.
7. cervical vertebra device for spreading according to claim 5, which is characterized in that the described 4th struts part and second movement
Part rotation connection.
8. cervical vertebra device for spreading according to claim 7, which is characterized in that the third struts part and described second and adjusts
Unit rotational connection.
9. cervical vertebra device for spreading according to claim 5, which is characterized in that described first, which adjusts unit, includes:
First sliding block, first sliding block and the supporting guide are slidably connected；
Described second, which adjusts unit, includes:
Second sliding block, second sliding block and the supporting guide are slidably connected.
10. cervical vertebra device for spreading according to claim 1, which is characterized in that the supporting guide is arc-shaped.
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