CN201701288U - Intramedullary nail device - Google Patents
Intramedullary nail device Download PDFInfo
- Publication number
- CN201701288U CN201701288U CN2010201678762U CN201020167876U CN201701288U CN 201701288 U CN201701288 U CN 201701288U CN 2010201678762 U CN2010201678762 U CN 2010201678762U CN 201020167876 U CN201020167876 U CN 201020167876U CN 201701288 U CN201701288 U CN 201701288U
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- CN
- China
- Prior art keywords
- screw
- intramedullary pin
- hole
- pin bar
- snap close
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- Expired - Fee Related
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Abstract
The utility model discloses an intramedullary nail device, which comprises an intramedullary nail and a tensile screw, wherein the intramedullary nail comprises an intramedullary nail stem which adopts a long shaft lever with a thin far end and a thick near end and certain degree of curvature; a long through hole is axially formed in the intramedullary nail stem; a pressure-relief plane and a locking hole are sequentially arranged at the far end of the intramedullary nail stem, and a slant non-circular tensile hole is formed at the near end of the intramedullary nail stem; the tensile screw comprises a screw main body, a screw outer sleeve, a screw lock catch and a screw lock sleeve; a screw-type cutter blade is arranged at the front end of the screw main body, and the diameter at the rear end of the screw main body is smaller than that of the front end; and the vertical cross section of a shaft of the screw outer sleeve is non-circular matched with the tensile hole of the intramedullary nail stem. Since the slant non-circular tensile hole is formed at the near end of the intramedullary nail stem, the screw outer sleeve can not rotate after the tensile screw is mounted on the intramedullary nail due to the tensile hole with the shape matched with the screw outer sleeve with corresponding shape, the tensile screw can not rotate, the structure is more stable, and the maladaptation feeling of the wounded can be alleviated.
Description
Technical field
This utility model relates to the orthopedic fixation device tool, particularly a kind of intramedullary pin device.
Background technology
When fracture takes place in human skeleton, can use intramedullary pin to connect knochenbruch usually, intramedullary pin generally means the long steel nail that is placed in the medullary cavity.Such as the femur and the tibia of lower limb, after an end of bone is opened wound and put into intramedullary pin, lag screw and staple are installed respectively at the near-end and the far-end of intramedullary pin, can prevent the rotation and the shortening of bone.Usually the hole of the lag screw of installing on the intramedullary pin is designed to circle, and after columniform lag screw installation was mixed in circular pulling force hole, lag screw rotated easily, brings incompatible sense to the wounded, even pain.
The front end of present in addition lag screw adopts the screw-type structure usually, when physical activity, capital movement tendency is to want to shake off out hanging tight of lag screw, be that lag screw has the trend that withdraws from the femoral head, for the old people, old people's sclerotin is comparatively loose simultaneously, and the anti-power of cutting out of screw-type structure is less, the pressure that in squeezing into the process of skeleton skeleton is formed is less, so lag screw is installed, and the back is easy becomes flexible.
The utility model content
The purpose of this utility model is to provide a kind of intramedullary pin device, and is simple in structure, can prevent effectively that lag screw from rotating, and reduces the wounded's incompatibility sense.
The technical scheme that realizes this utility model purpose is: a kind of intramedullary pin device comprises intramedullary pin and lag screw; Intramedullary pin comprises the intramedullary pin bar, the intramedullary pin bar is that the thin near-end of far-end is thick and have a long shaft rod of certain flexibility, the intramedullary pin bar is axially arranged with long through-hole, and the far-end of intramedullary pin bar is provided with decompression Plane and locking hole successively, and the near-end of intramedullary pin bar is provided with oblique non-circular pulling force hole; Lag screw passes the pulling force hole of intramedullary pin bar when using, comprise screw body, screw overcoat, screw snap close and screw lock tube; The screw overcoat is enclosed within the rear end of screw body, and the screw snap close is connected with the rear end of screw body, and the screw lock tube is fixedlyed connected with the afterbody of screw overcoat, and is threaded with the screw snap close; The screw body front end is provided with spiral blade, and the diameter of rear end is less than the diameter of front end; The vertical cross-section of the axle of screw overcoat is cooperate with the pulling force hole of intramedullary pin bar non-circular.
Described intramedullary pin also comprises sealing cap, and sealing cap is connected with the tailing screw flight of the near-end of intramedullary pin bar, and described sealing cap is threaded with the tail end of the long through-hole of intramedullary pin bar, sealing cap axially also be provided with through hole.
The rear of the long through-hole of described intramedullary pin bar is followed successively by the sealing cap screw and compresses screw, and the intramedullary pin bar is threaded with sealing cap by the sealing cap screw.
The far-end of described intramedullary pin bar is provided with many decompression Plane, and the two ends in upper pulling force hole are provided with locating platform, and the afterbody of near-end is provided with groove.
Described screw body be axially arranged with manhole; Described screw snap close be axially arranged with the hole, the hole is a through hole, and the rear end is hexagonal hole, the screw catch surface is provided with external screw thread; Described screw lock tube be axially arranged with tapped through hole, tapped through hole cooperates with the external screw thread of screw snap close.
The afterbody of described screw body is provided with U type groove, and the bottom land of U type groove is the outer wall of screw body, and the rear end of U type groove is provided with the nib to inner process; The axial cross section of the front end of described screw snap close is I-shaped, and screw snap close front end cooperates with the U type groove and the nib of screw body, is connected the rear end of screw body.
The inside of the tail end of described screw overcoat is provided with convex, and the front end of screw lock tube is provided with grab, and grab is connected on the convex of screw overcoat.
The spiral blade of described screw body is a backpitch; The screw thread of the tapped through hole of the external screw thread of described screw snap close and screw lock tube is left-hand thread.
The end face of the tail end of the U type groove of described screw body is the flank of tooth, and the front end face of screw lock tube is provided with equally distributed tooth, and the tooth and the flank of tooth can closely cooperate.
A kind of intramedullary pin device also comprises lock-screw and housing screw; Described lock-screw passes the locking hole of intramedullary pin bar when using; Described housing screw is assemblied in compressing in the screw of intramedullary pin bar.
The utlity model has following beneficial effect: the near-end of (1) intramedullary pin bar of the present utility model is provided with oblique non-circular pulling force hole, the screw overcoat of respective shapes is mixed in the pulling force hole of this shape, after installing lag screw on the intramedullary pin, the screw overcoat can not rotate, thereby lag screw can not rotate, structure is more stable, reduces the wounded's incompatibility sense.
(2) rear of the long through-hole of intramedullary pin bar of the present utility model is followed successively by the sealing cap screw and compresses screw, behind the installation clamp nut, can compress lag screw like this in compressing screw, makes lag screw be not easy to produce and slides.
(3) far-end of intramedullary pin bar of the present utility model is provided with many decompression Plane, and bone marrow marrow blood flow was unimpeded after this structure made the wounded that intramedullary pin is installed, and the fracture portions healing rate is fast.The two ends in intramedullary pin bar upper pulling force hole are provided with locating platform, can accurately aim at the pulling force hole on the intramedullary pin bar when this structure makes the lag screw installation.The afterbody of the near-end of intramedullary pin bar is provided with groove, and this structure can play the effect that auxiliary intra medullary nail is installed.
(4) front end of screw body of the present utility model is provided with spiral blade, and this structure has improved blade makes a concerted effort for the anchor of skeleton, and the wound that causes is little, the anti-power of the cutting out height of blade, and the fixation of blade is reliable, can effectively prevent bone rotation and sinking.
(5) screw body of the present utility model be axially arranged with manhole, this structure can play decompressing effect, increase effective blood confession of bone, and surgical injury is little, goes out insufficiency of blood, the healing rate height.
(6) this utility model screw lock tube is fixedlyed connected with the afterbody of screw overcoat, and is threaded with the screw snap close, and this structure makes the adjustable length of lag screw can adapt to the fixing of different parts or different the wounded's skeletons.
(7) screw snap close front end of the present utility model cooperates with the U type groove and the nib of screw body, be connected the rear end of screw body, this structure makes when screw latches in screw lock tube internal rotation that screw body can not followed the screw snap close and be rotated, and can not cause incompatible sense with the wounded.
(8) the spiral blade of screw body of the present utility model is a backpitch, the screw thread of the tapped through hole of the external screw thread of screw snap close and screw lock tube also is a left-hand thread, this structure makes that squeezing into behind the skeleton of blade is more stable, and after in the hexagonal hole of lag screw driver insertion screw snap close rear end, only need turn clockwise, just can be with screw snap close and the locking of screw lock tube, being rotated counterclockwise both will separate, and so just meets the custom of tightening thing in people's daily life clockwise.
(9) end face of the tail end of the U type groove of screw body of the present utility model is the flank of tooth, the front end face of screw lock tube is provided with equally distributed tooth, and the tooth and the flank of tooth can closely cooperate, and this structure makes after the lag screw locking, screw body and screw lock tube can closely be interlocked, and are not easy to become flexible.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment also in conjunction with the accompanying drawings, this utility model is described in further detail, wherein below
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of intramedullary pin.
Fig. 3 is the structural representation of intramedullary pin bar.
Fig. 4 is the structural representation of sealing cap.
Fig. 5 is the structural representation of pulling force hole and locating platform.
Fig. 6 is the structural representation of tail end of the near-end of intramedullary pin bar.
Structural representation when Fig. 7 locks for screw snap close and screw lock tube.
Structural representation when Fig. 8 unclamps for screw snap close and screw lock tube.
Fig. 9 is the structural representation of type screw body.
Figure 10 is the vertical view of Fig. 9.
Figure 11 is the upward view of Fig. 9.
Figure 12 is the structural representation of screw overcoat.
Figure 13 is the A place partial enlarged drawing of Figure 12.
Figure 14 is the vertical view of Figure 12.
Figure 15 is the structural representation of screw snap close.
Figure 16 is the structural representation of screw lock tube.
Figure 17 is the left view of Figure 16.
Label is in the accompanying drawing:
The specific embodiment
(embodiment 1)
See Fig. 1 to Figure 17, present embodiment comprises intramedullary pin, lag screw, lock-screw 7 and housing screw 8.
Intramedullary pin comprises intramedullary pin bar 1 and sealing cap 2.Sealing cap 2 is connected with the tailing screw flight of the near-end of intramedullary pin bar 1, intramedullary pin bar 1 is that the thin near-end of far-end is thick, and have a long shaft rod of certain flexibility, intramedullary pin bar 1 is axially arranged with long through-hole 11, the rear of the long through-hole 11 of intramedullary pin bar 1 is followed successively by sealing cap screw 11-1 and compresses screw 11-2, intramedullary pin bar 1 is threaded with sealing cap 2 by sealing cap screw 11-1, the far-end of intramedullary pin bar 1 is provided with decompression Plane 12 and locking hole 13 successively, decompression Plane 12 is provided with many, the near-end of intramedullary pin bar 1 is provided with oblique non-circular pulling force hole 14, the two ends in pulling force hole 14 are provided with locating platform 15, and the afterbody of the near-end of intramedullary pin bar 1 is provided with groove 16.Sealing cap 2 is threaded with the tail end of the long through-hole 11 of intramedullary pin bar 1, sealing cap 2 axially also be provided with through hole 21.
Lag screw passes the pulling force hole 14 of intramedullary pin bar 1 when using; Comprise screw body 3, screw overcoat 4, screw snap close 5 and screw lock tube 6.Screw body 3 be axially arranged with manhole 31, front end is provided with spiral blade 32, spiral blade 32 is a backpitch, the diameter of rear end is less than the diameter of front end, the afterbody of screw body 3 is provided with U type groove 33, the bottom land of U type groove 33 is the outer wall of screw body 3, and the rear end of U type groove 33 is provided with the nib 34 to inner process, and the end face of the tail end of the U type groove 33 of screw body 3 is the flank of tooth 35.The vertical cross-section of the axle of screw overcoat 4 is non-circular, and screw overcoat 4 is enclosed within the rear end of screw body 3, and the inside of tail end is provided with convex 41.Screw snap close 5 be axially arranged with hole 51, hole 51 is a through hole, and the rear end is a hexagonal hole, screw snap close 5 surfaces are provided with external screw thread 52, the axial cross section of the front end of screw snap close 5 is I-shaped, screw snap close 5 front ends cooperate with the U type groove 33 and the nib 34 of screw body 3, are connected the rear end of screw body 3.Screw lock tube 6 is fixedlyed connected with the afterbody of screw overcoat 4, and be threaded with screw snap close 5, screw lock tube 6 be axially arranged with tapped through hole 61, tapped through hole 61 cooperates with the external screw thread 52 of screw snap close 5 and both are left-hand thread, the front end of screw lock tube 6 is provided with grab 62, grab 62 is connected on the convex 41 of screw overcoat 4, and the front end face of screw lock tube 6 is provided with equally distributed tooth 63, and tooth 63 can closely cooperate with the flank of tooth 35.
Lock-screw 7 passes the locking hole 13 of intramedullary pin bar 1 when using; Housing screw 8 is assemblied in compressing in the screw 11-2 of intramedullary pin bar 1.
Should be appreciated that specific embodiment described above only is used to explain this utility model, and be not used in qualification this utility model.Conspicuous variation of being extended out by spirit of the present utility model or change still are among the protection domain of the present utility model.
Claims (10)
1. an intramedullary pin device is characterized in that: comprise intramedullary pin and lag screw; Intramedullary pin comprises intramedullary pin bar (1), intramedullary pin bar (1) is thick and have a long shaft rod of certain flexibility for the thin near-end of far-end, intramedullary pin bar (1) is axially arranged with long through-hole (11), the far-end of intramedullary pin bar (1) is provided with decompression Plane (12) and locking hole (13) successively, and the near-end of intramedullary pin bar (1) is provided with oblique non-circular pulling force hole (14); Lag screw passes the pulling force hole (14) of intramedullary pin bar (1) when using, comprise screw body (3), screw overcoat (4), screw snap close (5) and screw lock tube (6); Screw overcoat (4) is enclosed within the rear end of screw body (3), and screw snap close (5) is connected with the rear end of screw body (3), and screw lock tube (6) is fixedlyed connected with the afterbody of screw overcoat (4), and is threaded with screw snap close (5); Screw body (3) front end is provided with spiral blade (32), and the diameter of rear end is less than the diameter of front end; The vertical cross-section of the axle of screw overcoat (4) is cooperate with the pulling force hole (14) of intramedullary pin bar (1) non-circular.
2. a kind of intramedullary pin device according to claim 1, it is characterized in that: described intramedullary pin also comprises sealing cap (2), sealing cap (2) is connected with the tailing screw flight of the near-end of intramedullary pin bar (1), described sealing cap (2) is threaded with the tail end of the long through-hole (11) of intramedullary pin bar (1), sealing cap (2) axially also be provided with through hole (21).
3. a kind of intramedullary pin device according to claim 2, it is characterized in that: the rear of the long through-hole (11) of described intramedullary pin bar (1) is followed successively by sealing cap screw (11-1) and compresses screw (11-2), and intramedullary pin bar (1) is threaded with sealing cap (2) by sealing cap screw (11-1).
4. a kind of intramedullary pin device according to claim 3 is characterized in that: the far-end of described intramedullary pin bar (1) is provided with many decompression Plane (12), and the two ends of upper pulling force hole (14) are provided with locating platform (15), and the afterbody of near-end is provided with groove (16).
5. a kind of intramedullary pin device according to claim 4 is characterized in that: described screw body (3) be axially arranged with manhole (31); Described screw snap close (5) be axially arranged with hole (51), hole (51) are through hole, and the rear end is hexagonal hole, screw snap close (5) surface is provided with external screw thread (52); Described screw lock tube (6) be axially arranged with tapped through hole (61), tapped through hole (61) cooperates with the external screw thread (52) of screw snap close (5).
6. a kind of intramedullary pin device according to claim 5, it is characterized in that: the afterbody of described screw body (3) is provided with U type groove (33), the bottom land of U type groove (33) is the outer wall of screw body (3), and the rear end of U type groove (33) is provided with the nib (34) to inner process; The axial cross section of the front end of described screw snap close (5) is I-shaped, and screw snap close (5) front end cooperates with the U type groove (33) and the nib (34) of screw body (3), is connected the rear end of screw body (3).
7. a kind of intramedullary pin device according to claim 6, it is characterized in that: the inside of the tail end of described screw overcoat (4) is provided with convex (41), the front end of screw lock tube (6) is provided with grab (62), and grab (62) is connected on the convex (41) of screw overcoat (4).
8. a kind of intramedullary pin device according to claim 7 is characterized in that: the spiral blade (32) of described screw body (3) is a backpitch; The external screw thread (52) of described screw snap close (5) is left-hand thread with the screw thread of the tapped through hole (61) of screw lock tube (6).
9. a kind of intramedullary pin device according to claim 8, it is characterized in that: the end face of the tail end of the U type groove (33) of described screw body (3) is the flank of tooth (35), the front end face of screw lock tube (6) is provided with equally distributed tooth (63), and tooth (63) can closely cooperate with the flank of tooth (35).
10. according to the described a kind of intramedullary pin device of one of claim 1 to 9, it is characterized in that: also comprise lock-screw (7) and housing screw (8); Described lock-screw (7) passes the locking hole (13) of intramedullary pin bar (1) when using; Described housing screw (8) is assemblied in compressing in the screw (11-2) of intramedullary pin bar (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201678762U CN201701288U (en) | 2010-04-23 | 2010-04-23 | Intramedullary nail device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201678762U CN201701288U (en) | 2010-04-23 | 2010-04-23 | Intramedullary nail device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201701288U true CN201701288U (en) | 2011-01-12 |
Family
ID=43438432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201678762U Expired - Fee Related CN201701288U (en) | 2010-04-23 | 2010-04-23 | Intramedullary nail device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201701288U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105147380A (en) * | 2015-10-10 | 2015-12-16 | 广东工业大学 | Proximal femur triangle-fixing intramedullary nail locking device |
| CN107280749A (en) * | 2017-08-03 | 2017-10-24 | 大博医疗科技股份有限公司 | Edge structure, hip screw and femoral fracture therapeutic system |
-
2010
- 2010-04-23 CN CN2010201678762U patent/CN201701288U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105147380A (en) * | 2015-10-10 | 2015-12-16 | 广东工业大学 | Proximal femur triangle-fixing intramedullary nail locking device |
| CN107280749A (en) * | 2017-08-03 | 2017-10-24 | 大博医疗科技股份有限公司 | Edge structure, hip screw and femoral fracture therapeutic system |
| EP3485832A4 (en) * | 2017-08-03 | 2019-10-02 | Double Medical Technology Inc. | Blade structure, hip screw, and femoral fracture treatment apparatus |
| CN107280749B (en) * | 2017-08-03 | 2023-06-16 | 大博医疗科技股份有限公司 | Blade structure, hip screw and femoral fracture treatment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TRAUSON MEDICAL INSTRUMENT (CHINA) CO., LTD. Free format text: FORMER NAME: TRAUSON MEDICAL INSTRUMENT (JIANGSU) CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 213163 Renmin West Road, Niu Tong Town, Wujin District, Jiangsu, Changzhou Patentee after: Trauson Medical Instrument (China) Company Limited Address before: 213163 Renmin West Road, Niu Tong Town, Wujin District, Jiangsu, Changzhou Patentee before: Trauson Medical Instrument (Jiangsu) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20190423 |