CN204863444U - Screw for orthopedics - Google Patents
Screw for orthopedics Download PDFInfo
- Publication number
- CN204863444U CN204863444U CN201520629801.4U CN201520629801U CN204863444U CN 204863444 U CN204863444 U CN 204863444U CN 201520629801 U CN201520629801 U CN 201520629801U CN 204863444 U CN204863444 U CN 204863444U
- Authority
- CN
- China
- Prior art keywords
- nail
- screw
- blind rivet
- rear end
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a screw for orthopedics, the front end of its nail pole is the tapering point, and the tail end of nail pole is the head of a nail, and nail pole outer wall is equipped with the external screw thread, is equipped with a pillar cavity in the nail pole, and the inner wall of pillar cavity fore -end is equipped with the internal thread, be equipped with a nail core in the pillar cavity, nail core front end be most advanced, and the well front portion of nail core is equipped with guide boss, open on the pointed end of nail core to the regional outer wall of guide boss threaded, and the interior screw -thread fit of this screw thread and pillar cavity fore -end, a word groove has all been opened to nail core rear end and head of a nail rear end. It adopts twice screw in, has reduced the wearing and tearing of screw screw in in -process screw thread to the sclerotin, has guaranteed grab the hold power of sclerotin to the screw, and nail core and nail lever lock be the back surely, and the nail core can provide strong fixing for the nail pole, makes the nail pole fixed more firm.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, particularly relates to a kind of Orthopedic screw nail.
Background technology
Steel plate screw internal fixation be Orthopedic Clinical treatment fracture disease conventional means, it is fixedly connected with knochenbruch respectively at steel plate two ends by screw, for knochenbruch provides support so that when hold reset position quickly-healing.The screw of current Clinical practice is compared with plain screw, only material has different, and structure is comparatively similar, screw in bone internal procedure at screw, the sclerotin of nail periphery is subject to thread damage gradually, and makes the grasp dynamics of sclerotin to screw little, and the fixed effect of nail is poor, especially for osteoporosis or the comparatively crisp soft case of sclerotin, the fixed effect of this screw is poorer.
Utility model content
It is simple that the purpose of this utility model is to provide a kind of structure, strong with sclerotin adhesion, greatly can improve the Orthopedic screw nail of its fixed effect.
For realizing above-mentioned technical purpose, this utility model adopts following technical scheme:
A kind of Orthopedic screw nail, it comprises a nail bar, and the front end of nail bar is tapering point, and the tail end of nail bar is the head of a nail, and nail bar outer wall is provided with external screw thread, and be provided with post chamber through before and after in nail bar, the inwall of post chamber fore-end is provided with female thread; Described post intracavity is provided with a blind rivet, and blind rivet front end is most advanced and sophisticated, and the middle front part of blind rivet is provided with the guide ledges be slidably matched with post chamber, and the outer wall in tip to the guide ledges region of blind rivet has screw thread, and the screw-internal thread fit of this screw thread and post chamber fore-end; Described blind rivet rear end and head of a nail rear end all have flat recess; Under original state, the rear end of blind rivet is concordant with head of a nail rear end, and now the tip of blind rivet is positioned on front side of the tapering point of nail bar just, and the flat recess of blind rivet rear end and head of a nail rear end is positioned at same straight line.
This utility model has following beneficial effect: due in an initial condition, the rear end of blind rivet is concordant with head of a nail rear end, and the flat recess of blind rivet rear end and head of a nail rear end is positioned at same straight line, utilize flathead screwdriver to support two flat recesses simultaneously, tip by blind rivet will be followed closely bar and be screwed in sclerotin, after nail bar fixedly completes, use undersized flathead screwdriver instead and rotate blind rivet separately, blind rivet continues to screw in sclerotin, when the female thread in subject-oriented boss and post chamber supports, namely blind rivet realizes locking with nail bar, blind rivet can thus be nail bar and provides strong fixing, make nail bar fixing more firm.It adopts twice screw-in, and the external diameter of blind rivet is less than the external diameter of nail bar, decreases screw thread in screw screw-in process and, to the wearing and tearing of sclerotin, ensure that the grasping force of sclerotin to screw, ensure that the overall fixed effect of screw.
Accompanying drawing explanation
Fig. 1 is the structural representation under this Orthopedic screw nail original state.
Fig. 2 is the structural representation after Orthopedic screw nail is installed.
In figure, 1, most advanced and sophisticated, 2, tapering point, 3, guide ledges, 4, blind rivet, 5, post chamber, 6, the head of a nail, 7, flat recess, 8, nail bar, 9, external screw thread, 10, female thread, 11, screw thread, 12, plug.
Detailed description of the invention
As shown in Figure 1, 2, a kind of Orthopedic screw nail disclosed in the utility model, it comprises a nail bar 8, the front end of nail bar 8 is tapering point 2, the tail end of nail bar 8 is the head of a nail 6, nail bar 8 outer wall is provided with external screw thread 9, and be provided with post chamber 5 through before and after in nail bar 8, the inwall of post chamber 5 fore-end is provided with female thread 10; A blind rivet 4 is provided with in described post chamber 5, blind rivet 4 front end is most advanced and sophisticated 1, the middle front part of blind rivet 4 is provided with the guide ledges 3 be slidably matched with post chamber 5, the outer wall in tip 1 to guide ledges 3 region of blind rivet 4 has screw thread 11, and this screw thread 11 coordinates with the female thread 10 of post chamber 5 fore-end; Described blind rivet 4 rear end and the head of a nail 6 rear end all have flat recess 7; Under original state, the rear end of blind rivet 4 is concordant with the head of a nail 6 rear end, and now the tip 1 of blind rivet 4 is positioned on front side of the tapering point 2 of nail bar 8 just, and the flat recess 7 of blind rivet 4 rear end and the head of a nail 6 rear end is positioned at same straight line.
Because this Orthopedic screw nail is in clinical medical, blind rivet 4 move forward rear pillar chamber 5 tail end expose, for preventing tissue from growing in post chamber 5, described post chamber 5 tail end is provided with the plug 12 of cooperation.
Due in an initial condition, the rear end of blind rivet 4 is concordant with the head of a nail 6 rear end, and the flat recess 7 of blind rivet 4 rear end and the head of a nail 6 rear end is positioned at same straight line, utilize flathead screwdriver to support two flat recesses 7 simultaneously, can nail bar 8 be screwed in sclerotin by the tip 1 of blind rivet 4 and the external screw thread 9 of nail bar 8, after nail bar 8 fixedly completes, use undersized flathead screwdriver instead and rotate separately blind rivet 4, blind rivet 4 continues to screw in sclerotin, when subject-oriented boss 3 supports with the female thread 10 in post chamber 5, namely blind rivet 4 realizes locking with nail bar 8, blind rivet 4 can thus be nail bar 8 and provides strong fixing, make nail bar 8 fixing more firm, finally by plug 12, post chamber 5 tail end is closed, cambium is avoided to enter in post chamber 5.
Claims (1)
1. an Orthopedic screw nail, it comprises a nail bar, it is characterized in that: the front end of nail bar is tapering point, and the tail end of nail bar is the head of a nail, and nail bar outer wall is provided with external screw thread, and be provided with post chamber through before and after in nail bar, the inwall of post chamber fore-end is provided with female thread; Described post intracavity is provided with a blind rivet, and blind rivet front end is most advanced and sophisticated, and the middle front part of blind rivet is provided with the guide ledges be slidably matched with post chamber, and the outer wall in tip to the guide ledges region of blind rivet has screw thread, and the screw-internal thread fit of this screw thread and post chamber fore-end; Described blind rivet rear end and head of a nail rear end all have flat recess; Under original state, the rear end of blind rivet is concordant with head of a nail rear end, and now the tip of blind rivet is positioned on front side of the tapering point of nail bar just, and the flat recess of blind rivet rear end and head of a nail rear end is positioned at same straight line; Described post chamber tail end is provided with the plug of cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520629801.4U CN204863444U (en) | 2015-08-13 | 2015-08-13 | Screw for orthopedics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520629801.4U CN204863444U (en) | 2015-08-13 | 2015-08-13 | Screw for orthopedics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204863444U true CN204863444U (en) | 2015-12-16 |
Family
ID=54807888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520629801.4U Expired - Fee Related CN204863444U (en) | 2015-08-13 | 2015-08-13 | Screw for orthopedics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204863444U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109464183A (en) * | 2018-12-18 | 2019-03-15 | 天衍医疗器材有限公司 | Orthopaedics pedicle screw |
| CN109464183B (en) * | 2018-12-18 | 2024-04-30 | 天衍医疗器材有限公司 | Orthopedic implant screw |
-
2015
- 2015-08-13 CN CN201520629801.4U patent/CN204863444U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109464183A (en) * | 2018-12-18 | 2019-03-15 | 天衍医疗器材有限公司 | Orthopaedics pedicle screw |
| CN109464183B (en) * | 2018-12-18 | 2024-04-30 | 天衍医疗器材有限公司 | Orthopedic implant screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20151216 Termination date: 20160813 |