CN209253087U - A kind of dynamic type pressurization hollow screw without a head - Google Patents
A kind of dynamic type pressurization hollow screw without a head Download PDFInfo
- Publication number
- CN209253087U CN209253087U CN201821112118.3U CN201821112118U CN209253087U CN 209253087 U CN209253087 U CN 209253087U CN 201821112118 U CN201821112118 U CN 201821112118U CN 209253087 U CN209253087 U CN 209253087U
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- China
- Prior art keywords
- guide pin
- anticreep
- screw
- screw body
- thread
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Abstract
The utility model discloses a kind of dynamic type pressurization hollow screws without a head, including screw body, screw body outer wall is equipped with fastening thread, guide pin chamber is offered inside screw body, guide pin cavity wall offers the intracavitary screw thread of guide pin, cone head part upper surface offers anticreep hole, anticreep hole lower part offers anticreep card slot, cylindrical driving spanner is equipped with inside anticreep hole, the intracavitary portion of guide pin is equipped with guide pin, guide pin outer wall is equipped with guide pin external screw thread, and guide pin is perforated through guide pin chamber upper and lower end faces, and the internal cavities of driving spanner are arranged in guide pin.It equipped with the intracavitary screw thread of guide pin inside this practical screw body, is cooperatively connected, is prevented when screw body is rotated with the guide pin external screw thread of guide pin outer wall, deviated with guide pin since gap occurs to loosen inside screw body, increase safety.
Description
Technical field
The utility model relates to medical equipment technical field, specially a kind of dynamic type pressurization hollow screw without a head.
Background technique
Hollow screw plays very big effect in terms for the treatment of fracture, and hollow screw generallys use good biocompatibility
Titanium alloy material manufacture, reaches good fixed effect by simply performing the operation, and fractures or is merged for medical treatment, is cut
Osseous surgery provides a kind of simple, accurate, reliable solution.
Hollow screw need it is permanent is retained in human body, so the fastness of hollow screw and safety are to Guan Chong
It wants.Existing hollow screw is usually cylindrical shape, and the screw thread for depending merely on outer wall, which is fixed, is also inevitable generation loosening；
In existing hollow screw installation, need to be implanted by the hollow part of screw along guide pin guidance, the hollow parts of screw
With guide pin sliding contact, it is easy to produce biggish gap between screw inner wall and guide pin, when screw carries out rotation implantation, can produce
Raw offset, it is possible to damage bone
Utility model content
The purpose of this utility model is to provide a kind of dynamic type pressurization hollow screws without a head, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions: a kind of dynamic type pressurization hollow screw without a head,
Including screw body, the screw body is cone shape, and upper end is equipped with cone head part, and screw body lower end is equipped with terebrantia, cone
The section diameter on head is greater than the section diameter of terebrantia, and screw body outer wall is equipped with fastening thread, opens up inside screw body
There is guide pin chamber, guide pin chamber penetrates screw body upper and lower end faces, and guide pin cavity wall offers the intracavitary screw thread of guide pin, the cone head part
Upper surface offers anticreep hole, and anticreep hole is cylindrical grooves, and two sides are provided with the groove of rectangular-shape, and anticreep hole lower part offers
Anticreep card slot, the anticreep hole inside are equipped with cylindrical driving spanner, and driving spanner inside is hollow cavity, drives spanner lower end
Two sides are equipped with anticreep fixture block, and the intracavitary portion of guide pin is equipped with guide pin, and guide pin outer wall is equipped with guide pin external screw thread, and guide pin, which is perforated through, leads
The internal cavities of driving spanner are arranged in needle cavity upper and lower end faces, guide pin, and guide pin penetrates spanner upper and lower end faces of overdriving.
Preferably, the intracavitary screw thread of guide pin that the intracavitary portion of the guide pin opens up is left hand thread, guide pin set by guide pin outside
External screw thread is left hand thread, and the intracavitary screw thread of guide pin and guide pin external screw thread, which cooperate, to be connected, and fastening thread is left hand thread.
Preferably, the exterior radius of the driving spanner is contacted with the rotation of the inner wall in anticreep hole, is driven set by spanner lower end
The rectangular-shape groove cooperation that opens up of anticreep fixture block and anticreep hole two sides contact.
Preferably, the anticreep card slot be two symmetric fanning grooves, anticreep card slot with it is rectangular set by the two sides of anticreep hole
The connection of body shape groove, the height of anticreep card slot are equal with the height of anticreep fixture block.
Preferably, the driving spanner inner wall radius is greater than the externally threaded outermost end radius of turn of guide pin, drives on spanner
Portion two sides are equipped with handle.
Compared with prior art, the utility model has the beneficial effects that
1. being equipped with the intracavitary screw thread of guide pin inside practical screw body, cooperates with the guide pin external screw thread of guide pin outer wall and connect
It connects, prevents when screw body is rotated, deviated with guide pin since gap occurs to loosen inside screw body, increase safety
Property；
2. the practical screw using cylindrical shape, when screw body is tightly locked inside sclerotin, sclerotin can give screw
Ontology inclined side one power increases the stability of screw body, and this practical screw is not provided with bulky ailhead,
Can be buried inside sclerotin, stability is further increased, while preventing ailhead to the wear damage of sclerotin.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model section view；
Fig. 3 is utility model works connection schematic diagram；
Fig. 4 is the schematic diagram that spanner is driven in the utility model.
In figure: the intracavitary screw thread 6 of screw body 1, cone head part 2, terebrantia 3, fastening thread 4, guide pin chamber 5, guide pin, anticreep hole
7, anticreep card slot 8, guide pin 9, guide pin external screw thread 10, driving spanner 11, anticreep fixture block 12.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-4 is please referred to, the utility model provides a kind of technical solution: a kind of dynamic type pressurization hollow screw without a head, packet
Screw body 1 is included, screw body 1 is cone shape, and upper end is equipped with cone head part 2, and 1 lower end of screw body is equipped with terebrantia 3, conehead
The section diameter in portion 2 is greater than the section diameter of terebrantia 3, and 1 outer wall of screw body is equipped with fastening thread 4, opens inside screw body 1
Equipped with guide pin chamber 5, guide pin chamber 5 penetrates 1 upper and lower end faces of screw body, and 5 inner wall of guide pin chamber offers the intracavitary screw thread 6 of guide pin, cone
2 upper surface of head offers anticreep hole 7, and anticreep hole 7 is cylindrical grooves, and two sides are provided with the groove of rectangular-shape, under anticreep hole 7
Portion offers anticreep card slot 8, is equipped with cylindrical driving spanner 11 inside anticreep hole 7, and driving is hollow cavity inside spanner 11, drives
11 lower end two sides of wrench are equipped with anticreep fixture block 12, and guide pin 9 is equipped with inside guide pin chamber 5, and 9 outer wall of guide pin is equipped with guide pin external screw thread
10, guide pin 9 is perforated through 5 upper and lower end faces of guide pin chamber, and the internal cavities of driving spanner 11 are arranged in guide pin 9, and guide pin 9 is perforated through drive
11 upper and lower end faces of wrench.
The intracavitary screw thread 6 of the guide pin opened up inside guide pin chamber 5 is left hand thread, guide pin external screw thread 10 set by 9 outside of guide pin
For left hand thread, the intracavitary screw thread 6 of guide pin and guide pin external screw thread 10 cooperate and connect, so that when rotary screw ontology 1
So that the steady bottom of screw body 1 rotates down, fastening thread 4 is left hand thread, the direction one when being rotated down with screw body 1
It causes, fastening thread 4 is engaged with sclerotin, self tapping is downward；
It drives the exterior radius of spanner 11 to contact with the rotation of the inner wall in anticreep hole 7, drives anticreep set by 11 lower end of spanner
Fixture block 12 is contacted with the rectangular-shape groove cooperation that 7 two sides of anticreep hole open up, and driving spanner 11 is closely fastened in anticreep hole 7
Portion prevents from generating loosening when rotating driving spanner 11, causes contraposition inaccuracy and the secondary injury to affected part；
Anticreep card slot 8 is two symmetric fanning grooves, rectangular-shape groove set by anticreep card slot 8 and 7 two sides of anticreep hole
Connection, the height of anticreep card slot 8 is equal with the height of anticreep fixture block 12, rotates to driving spanner 11, drives 11 bottom end two of spanner
The anticreep fixture block 12 of side is caught in inside anticreep card slot 8, is prevented driving spanner 11 from deviating from outward, is increased safety；
It drives 11 inner wall radius of spanner to be greater than the outermost end radius of turn of guide pin external screw thread 10, avoids inside driving spanner 11
It is worn with guide pin 9, driving 11 top two sides of spanner are equipped with handle, convenient for rotating to driving spanner 11.
Guide pin 9: when this practical work, being fixed on the direction for needing pedicle screw ontology 1 by working principle, guide pin chamber 5 with
Guide pin 9 carries out cooperation rotation connection, and driving spanner 11 in inside, drives 9 sets of guide pin in the insertion anticreep hole 7 of 11 lower end of spanner
The groove that portion, anticreep fixture block 12 and 7 two sides of anticreep hole are opened up is cooperatively connected, and rotation driving spanner 11 blocks anticreep fixture block 12
Enter anticreep card slot 8, prevent when driving spanner 11 to rotate, driving spanner 11 and cone head part 2 are detached from, and cause positional shift or right
Patient causes secondary injury, and the handle of 11 top of rotate driving spanner rotates screw body 1,1 inside institute of screw body
If the intracavitary screw thread of guide pin 6 be cooperatively connected with guide pin external screw thread 10, and screw body 1 is rotated down, this process is stablized, no
The loosening of implantation is easily caused, fastening thread 4 set by 1 outer wall of screw body is consistent with 5 hand of spiral of guide pin chamber, fastening thread 4
But also screw body 1 is to being implanted into inside sclerotin when engaging with sclerotin self tapping, screw body 1 is cone, when being fully implanted in,
The pressure that sclerotin can give 1 outer wall of screw body certain guarantees that screw body 1 is not easy abjection and loosens, and screw body 1 is dress without a head
It sets, can be buried to inside affected part, while increasing stability, and affected part is not injured, safety and firmness.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (5)
1. a kind of dynamic type pressurization hollow screw without a head, including screw body (1), it is characterised in that: the screw body (1) is
Cone shape, upper end are equipped with cone head part (2), and screw body (1) lower end is equipped with terebrantia (3), and the section diameter of cone head part (2) is big
In the section diameter of terebrantia (3), screw body (1) outer wall is equipped with fastening thread (4), offers and leads inside screw body (1)
Needle cavity (5), guide pin chamber (5) penetrate screw body (1) upper and lower end faces, and guide pin chamber (5) inner wall offers the intracavitary screw thread of guide pin
(6), cone head part (2) upper surface offers anticreep hole (7), and anticreep hole (7) are cylindrical grooves, and two sides are provided with rectangular-shape
Groove, anticreep hole (7) lower part offers anticreep card slot (8), and cylindrical driving spanner is equipped with inside the anticreep hole (7)
It (11), is hollow cavity inside driving spanner (11), driving spanner (11) lower end two sides are equipped with anticreep fixture block (12), the guide pin
Guide pin (9) are equipped with inside chamber (5), guide pin (9) outer wall is equipped with guide pin external screw thread (10), and guide pin (9) is perforated through guide pin chamber (5) up and down
Both ends of the surface, in the internal cavities for driving spanner (11), guide pin (9) penetrates spanner of overdriving (11) upper and lower ends for guide pin (9) setting
Face.
2. a kind of dynamic type pressurization hollow screw without a head according to claim 1, it is characterised in that: the guide pin chamber (5)
The intracavitary screw thread of the guide pin that inside opens up (6) is left hand thread, and guide pin external screw thread (10) set by guide pin (9) outside is left-handed spiral shell
Line, the intracavitary screw thread of guide pin (6) and guide pin external screw thread (10), which cooperate, to be connected, and fastening thread (4) is left hand thread.
3. a kind of dynamic type pressurization hollow screw without a head according to claim 1, it is characterised in that: the driving spanner
(11) the inner wall rotation of exterior radius and anticreep hole (7) contact, drive anticreep fixture block (12) set by spanner (11) lower end and
The rectangular-shape groove that anticreep hole (7) two sides open up cooperates contact.
4. a kind of dynamic type pressurization hollow screw without a head according to claim 1, it is characterised in that: the anticreep card slot
It (8) is two symmetric fanning grooves, anticreep card slot (8) is connected to rectangular-shape groove set by anticreep hole (7) two sides, Anti-release clamp
The height of slot (8) is equal with the height of anticreep fixture block (12).
5. a kind of dynamic type pressurization hollow screw without a head according to claim 1, it is characterised in that: the driving spanner
(11) inner wall radius is greater than the outermost end radius of turn of guide pin external screw thread (10), and driving spanner (11) top two sides are equipped with hand
Handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821112118.3U CN209253087U (en) | 2018-07-13 | 2018-07-13 | A kind of dynamic type pressurization hollow screw without a head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821112118.3U CN209253087U (en) | 2018-07-13 | 2018-07-13 | A kind of dynamic type pressurization hollow screw without a head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209253087U true CN209253087U (en) | 2019-08-16 |
Family
ID=67557113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821112118.3U Active CN209253087U (en) | 2018-07-13 | 2018-07-13 | A kind of dynamic type pressurization hollow screw without a head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209253087U (en) |
-
2018
- 2018-07-13 CN CN201821112118.3U patent/CN209253087U/en active Active
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