CN208910437U - A kind of self-taped type cancellous bone screw - Google Patents
A kind of self-taped type cancellous bone screw Download PDFInfo
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- CN208910437U CN208910437U CN201721477078.8U CN201721477078U CN208910437U CN 208910437 U CN208910437 U CN 208910437U CN 201721477078 U CN201721477078 U CN 201721477078U CN 208910437 U CN208910437 U CN 208910437U
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Abstract
The utility model discloses a kind of self-taped type cancellous bone screws, including screw head and the screw rod connecting with screw head, thread are provided on the outer circle wall of screw rod, the screw rod tail forms drilling tail portion；The thread forms closely-pitched thread by the coarse thread thread close to screw head one end and one end close to drilling tail portion；The drilling tail portion includes by the outwardly extending drill body of screw rod, and drill body extends outwardly and oblique drilling tail, and a plurality of self tapping slot is opened up on drill body outer circle wall.The screw head design of the utility model has self tapping slot, make screw that can also form self tapping in the case where not shifting to an earlier date perforating from brill, to drill out be screwed into screw needed for hole, then bar portion is designed using varying pitch, front half section is that fine thread makes screw be easy to pierce in bone, and the second half section is that coarse thread is easy to that screw is fixed in cancellous bone, drilling operating when removal is performed the operation, by complicated surgical procedure summary, reduces operating time and improve procedure efficiency.
Description
Technical field
The utility model belongs to a kind of screw, and in particular to a kind of self-taped type cancellous bone screw.
Background technique
Prebored hole need to be accomplished fluently in advance when performing the operation according to physician feedback cancellous bone screw, then select different screws according to demand
Specification, however play prebored hole and be easy waste operating time, increase operation risk.So surgical quality and hand in order to better improve
Art time, urgent need develop a kind of self-tapping screw that can be directly threaded into bone without playing prebored hole.
Utility model content
The utility model is proposed to overcome disadvantage existing in the prior art, and the purpose is to provide a kind of self tapping
Type cancellous bone screw.
The technical solution of the utility model is:
A kind of self-taped type cancellous bone screw is arranged on the outer circle wall of screw rod including screw head and the screw rod connecting with screw head
There is thread, the screw rod tail forms drilling tail portion；The thread is by the coarse thread thread close to screw head one end and close to drilling tail portion
One end forms closely-pitched thread；The drilling tail portion includes by the outwardly extending drill body of screw rod, and drill body extends outwardly and oblique
Drilling tail opens up a plurality of self tapping slot on drill body outer circle wall.
The coarse thread thread and closely-pitched thread are respectively formed the first contact surface of coarse thread and closely-pitched close to the side in drilling tail portion
One contact surface, the side close to screw head are respectively formed the second contact surface of the second contact surface of coarse thread and closely-pitched；The coarse thread first connects
Thread form angle is respectively formed between contacting surface and the second contact surface of coarse thread and the second contact surface of the first contact surface of closely-pitched and closely-pitched.
The thread form angle is acute angle.
The root of first contact surface of coarse thread, the second contact surface of the first contact surface of closely-pitched, the second contact surface of coarse thread and closely-pitched
Portion is axially connected by arc-shaped transition section with screw rod.
With the vertex of thread form angle seat perpendicular to the vertical line of screw axis, the angle of first contact surface of coarse thread and vertical line is big
In the angle of coarse thread the second contact surface and vertical line；The angle of first contact surface of closely-pitched and vertical line is equal to the second contact surface of closely-pitched
With the angle of vertical line.
The cell wall of the self tapping slot is arcwall face.
Angle is in 90 ° between two adjacent slot walls of the self tapping slot.
The beneficial effects of the utility model are:
The screw head design of the utility model has self tapping slot, form screw also can in the case where not shifting to an earlier date perforating
Self tapping from boring, thus drill out be screwed into screw needed for hole, then bar portion is designed using varying pitch, and front half section makes spiral shell for fine thread
Nail is easy to pierce in bone, and the second half section is that coarse thread is easy to that screw is fixed in cancellous bone, and drilling operating when removal is performed the operation will
Complicated surgical procedure summary reduces operating time and improves procedure efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the partial enlarged view of part A in Fig. 1；
Fig. 3 is the partial enlarged view of part B in Fig. 1；
Fig. 4 be in Fig. 1 along C-C to sectional view.
Wherein:
1 screw head, 2 screw rod
3 thread, 4 drilling tail portion
31 coarse thread thread, 32 closely-pitched thread
41 drill body, 42 drilling tail
43 self tapping slot, 311 the first contact surface of coarse thread
312 the second contact surface of coarse thread, 321 the first contact surface of closely-pitched
322 the second contact surfaces of closely-pitched.
Specific embodiment
With reference to the accompanying drawings of the specification and embodiment carries out specifically a kind of self-taped type cancellous bone screw of the utility model
It is bright:
As shown in Fig. 1 ~ 4, a kind of self-taped type cancellous bone screw, including screw head 1 and the screw rod being connect with screw head 12, screw rod 2
Outer circle wall on be provided with thread 3,2 tail portion of screw rod forms drilling tail portion 4；The thread 3 is by close to the thick of 1 one end of screw head
The one end in tooth thread 31 and close drilling tail portion 4 forms closely-pitched thread 32；The drilling tail portion 4 includes by the outwardly extending brill of screw rod 2
Body 41, drill body extends outwardly and oblique drilling tail 42, opens up a plurality of self tapping slot 43 on 41 outer circle wall of drill body.
The coarse thread thread 31 and closely-pitched thread 32 are respectively formed the first contact surface of coarse thread 311 close to the side in drilling tail portion 4
With the first contact surface of closely-pitched 321, the side close to screw head 1 is respectively formed the second contact surface of the second contact surface of coarse thread 312 and closely-pitched
322；First contact surface of coarse thread 311 and the second contact surface of coarse thread 312 and the first contact surface of closely-pitched 321 and closely-pitched second
Thread form angle is respectively formed between contact surface 322.
The thread form angle is acute angle.
First contact surface of coarse thread 311, the first contact surface of closely-pitched 321, the second contact surface of coarse thread 312 and closely-pitched second connect
The root of contacting surface 322 is axially connected by arc-shaped transition section with screw rod 2.
With the vertex seat of thread form angle perpendicular to the vertical line of 2 axis of screw rod, the folder of first contact surface of coarse thread 311 and vertical line
Angle is greater than the angle of the second contact surface of coarse thread 312 and vertical line；The angle of first contact surface of closely-pitched 321 and vertical line is equal to closely-pitched
The angle of second contact surface 322 and vertical line.
The cell wall of the self tapping slot 43 is arcwall face.
Angle is in 90 ° between two adjacent slot walls of the self tapping slot 43.
The screw head design of the utility model has self tapping slot, form screw also can in the case where not shifting to an earlier date perforating
Self tapping from boring, thus drill out be screwed into screw needed for hole, then bar portion is designed using varying pitch, and front half section makes spiral shell for fine thread
Nail is easy to pierce in bone, and the second half section is that coarse thread is easy to that screw is fixed in cancellous bone, and drilling operating when removal is performed the operation will
Complicated surgical procedure summary reduces operating time and improves procedure efficiency.
Claims (6)
1. a kind of self-taped type cancellous bone screw, including screw head (1) and the screw rod (2) being connect with screw head (1), the outer circle of screw rod (2)
Thread (3) are provided on peripheral wall, it is characterised in that: screw rod (2) tail portion forms drilling tail portion (4)；The thread (3) is by close
One end of the coarse thread thread (31) of screw head (1) one end and close drilling tail portion (4) forms closely-pitched thread (32)；
The drilling tail portion (4) includes by screw rod (2) outwardly extending drill body (41), and drill body extends outwardly and oblique drilling tail
(42), a plurality of self tapping slot (43) is opened up on drill body (41) outer circle wall；
The side of the coarse thread thread (31) and closely-pitched thread (32) close drilling tail portion (4) is respectively formed the first contact surface of coarse thread
(311) and the first contact surface of closely-pitched (321), the side close to screw head (1) are respectively formed the second contact surface of coarse thread (312) and closely-pitched
Second contact surface (322)；First contact surface of coarse thread (311) and the contact of the second contact surface of coarse thread (312) and closely-pitched first
Thread form angle is respectively formed between face (321) and the second contact surface of closely-pitched (322).
2. a kind of self-taped type cancellous bone screw according to claim 1, it is characterised in that: the thread form angle is acute angle.
3. a kind of self-taped type cancellous bone screw according to claim 1, it is characterised in that: first contact surface of coarse thread
(311), the root of the first contact surface of closely-pitched (321), the second contact surface of coarse thread (312) and the second contact surface of closely-pitched (322) passes through
Arc-shaped transition section is axially connected with screw rod (2).
4. a kind of self-taped type cancellous bone screw according to claim 1, it is characterised in that: vertical with the vertex seat of thread form angle
In the vertical line of screw rod (2) axis, the angle of first contact surface of coarse thread (311) and vertical line is greater than the second contact surface of coarse thread
(312) with the angle of vertical line；The angle of first contact surface of closely-pitched (321) and vertical line is equal to the second contact surface of closely-pitched (322)
With the angle of vertical line.
5. a kind of self-taped type cancellous bone screw according to claim 1, it is characterised in that: the cell wall of the self tapping slot (43)
For arcwall face.
6. a kind of self-taped type cancellous bone screw according to claim 1, it is characterised in that: the two-phase of the self tapping slot (43)
Angle is in 90 ° between adjacent cell wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721477078.8U CN208910437U (en) | 2017-11-08 | 2017-11-08 | A kind of self-taped type cancellous bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721477078.8U CN208910437U (en) | 2017-11-08 | 2017-11-08 | A kind of self-taped type cancellous bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208910437U true CN208910437U (en) | 2019-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721477078.8U Active CN208910437U (en) | 2017-11-08 | 2017-11-08 | A kind of self-taped type cancellous bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208910437U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111493992A (en) * | 2020-04-28 | 2020-08-07 | 北京骨外固定技术研究所 | Self-tapping spicule |
-
2017
- 2017-11-08 CN CN201721477078.8U patent/CN208910437U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111493992A (en) * | 2020-04-28 | 2020-08-07 | 北京骨外固定技术研究所 | Self-tapping spicule |
| CN111493992B (en) * | 2020-04-28 | 2022-03-08 | 北京骨外固定技术研究所 | Self-tapping spicule |
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