CN2689900Y - Eccentric enlarger - Google Patents
Eccentric enlarger Download PDFInfo
- Publication number
- CN2689900Y CN2689900Y CN 200420038829 CN200420038829U CN2689900Y CN 2689900 Y CN2689900 Y CN 2689900Y CN 200420038829 CN200420038829 CN 200420038829 CN 200420038829 U CN200420038829 U CN 200420038829U CN 2689900 Y CN2689900 Y CN 2689900Y
- Authority
- CN
- China
- Prior art keywords
- drilling rod
- eccentric
- drill rod
- drill bit
- drill
- 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
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- Surgical Instruments (AREA)
Abstract
The utility model relates to a medical device for the arthrosteopedic surgery, in particular to an eccentric enlarger, comprising a drill rod whose end is provided with a drill bit. The new mechanical transmission structure is characterized in that the new mechanical transmission structure also comprises a drill rod sleeve whose inner cavity is an eccentric inner cavity; the drill rod passes through from the eccentric inner cavity of the drill rod sleeve; the drill rod and the drill rod sleeve are in clearance fit; one side of the drill bit bends along the direction of the drill rod, and the intersection angle of the side and the drill rod is an obtuse angle. When the eccentric enlarger is used, the eliminating range of the necrosis bones can be enlarged without increasing the diameter of the drill bit.
Description
Technical field
This utility model relates to the medical apparatus and instruments that a kind of orthopaedics is used, a kind of eccentric expander of more specifically saying so.
Background technology
At present, bone surgery treatment ischemic necrosis of femoral head will be removed necrotic bone with bone drill, inserts normal bone tissues.In order to guarantee therapeutic effect, necrotic bone all must be removed, this will enlarge the removing scope of necrotic bone, and common way is to strengthen the diameter of rod bit.Though necrotic bone all can be removed with the method that strengthens the rod bit diameter, will inevitably damage normal skeleton too much, reduce the intensity of skeleton, bring to the patient and pay face sound.
Summary of the invention
The purpose of this utility model provides and a kind ofly neither increases the diameter of drill bit, can enlarge the eccentric expander of the removing scope of necrotic bone again.
In order to realize above-mentioned purpose, the eccentric expander that is provided, comprise drilling rod, the end of drilling rod has drill bit, its construction features is also to comprise a drilling rod cover, and the inner chamber of this drilling rod cover is eccentric inner chamber, and drilling rod passes from the eccentric inner chamber of drilling rod cover, matched in clearance between drilling rod and the drilling rod cover, drill bit along the trend of drilling rod to a lateral buckling and with the angle of cut of drilling rod be the obtuse angle.
As the improvement to eccentric expander, an end that deviates from drill bit at the drilling rod cover is provided with handgrip.
During use, an end of drilling rod not being established drill bit is packed on the electric hand drill.In operation process, electric hand drill drives drilling rod and rotates, and drill bit rotates synchronously with drilling rod.Because to a lateral buckling, the track plane that drill bit rotates is just big along the trend of drilling rod for drill bit, thus drill bit to remove the scope of necrotic bone just big.
Learn by top narration, adopt this eccentric expander, under the prerequisite that does not increase bit diameter, just can enlarge the removing scope of necrotic bone.
Description of drawings
Embodiment of the present utility model is illustrated in conjunction with the accompanying drawings, wherein:
Fig. 1 is the structural representation of eccentric expander original state;
To be eccentric expander rotate structural representation behind 180 ° of angles by original state to Fig. 2.
Among the figure: 1 is drilling rod, and 2 is drill bit, and 3 is the drilling rod cover, and 4 is handgrip, and 5 is electric hand drill, and d is a bit diameter, and D is the diameter that drill bit rotates 360 ° of angle rotary motion trace faces.
The specific embodiment
With reference to accompanying drawing, the described eccentric expander of embodiment, comprise drilling rod 1, the end of drilling rod 1 has drill bit 2, and its construction features is also to comprise drilling rod cover 3, and the inner chamber of this drilling rod cover 3 is eccentric inner chambers, drilling rod 1 passes from the eccentric inner chamber of drilling rod cover 3, matched in clearance between drilling rod 1 and the drilling rod cover 3, drill bit 2 along the trend of drilling rod 1 to a lateral buckling and with the angle of cut of drilling rod 1 be the obtuse angle, be provided with handgrip 4 at drilling rod cover 3 ends that deviate from drill bit 2.
Claims (2)
1, a kind of eccentric expander, comprise drilling rod (1), the end of drilling rod (1) has drill bit (2), it is characterized in that also comprising a drilling rod cover (3), the inner chamber of this drilling rod cover (3) is eccentric inner chamber, drilling rod (1) passes from the eccentric inner chamber of drilling rod cover (3), matched in clearance between drilling rod (1) and the drilling rod cover (3), drill bit (2) along the trend of drilling rod (1) to a lateral buckling and with the angle of cut of drilling rod (1) be the obtuse angle.
2, eccentric expander according to claim 1 is characterized in that an end that deviates from drill bit (2) at drilling rod cover (3) is provided with handgrip (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038829 CN2689900Y (en) | 2004-03-01 | 2004-03-01 | Eccentric enlarger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038829 CN2689900Y (en) | 2004-03-01 | 2004-03-01 | Eccentric enlarger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2689900Y true CN2689900Y (en) | 2005-04-06 |
Family
ID=34671143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420038829 Expired - Fee Related CN2689900Y (en) | 2004-03-01 | 2004-03-01 | Eccentric enlarger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2689900Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688081A (en) * | 2012-06-04 | 2012-09-26 | 刘新平 | Femoral head medulla core decompression drill bit |
| CN103169524A (en) * | 2013-04-19 | 2013-06-26 | 山东冠龙医疗用品有限公司 | Abrasion drill for orthopedic operation |
| CN106137314A (en) * | 2016-08-04 | 2016-11-23 | 彭惠莲 | Operation abrasive drilling |
-
2004
- 2004-03-01 CN CN 200420038829 patent/CN2689900Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688081A (en) * | 2012-06-04 | 2012-09-26 | 刘新平 | Femoral head medulla core decompression drill bit |
| CN103169524A (en) * | 2013-04-19 | 2013-06-26 | 山东冠龙医疗用品有限公司 | Abrasion drill for orthopedic operation |
| CN106137314A (en) * | 2016-08-04 | 2016-11-23 | 彭惠莲 | Operation abrasive drilling |
| CN106137314B (en) * | 2016-08-04 | 2018-08-14 | 彭惠莲 | Operation abrasive drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |