CN2832080Y - Callus extender - Google Patents
Callus extender Download PDFInfo
- Publication number
- CN2832080Y CN2832080Y CN 200520034942 CN200520034942U CN2832080Y CN 2832080 Y CN2832080 Y CN 2832080Y CN 200520034942 CN200520034942 CN 200520034942 CN 200520034942 U CN200520034942 U CN 200520034942U CN 2832080 Y CN2832080 Y CN 2832080Y
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- China
- Prior art keywords
- motor
- leading screw
- support
- callus
- lengthening device
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Abstract
The utility model relates to a bone scab extender which comprises a first and a second bone nails, a first and second brackets, a screw rod and a motor, wherein the first and the second brackets are respectively arranged on the first and the second bone nails. The motor drives the screw rod to rotate. The screw rod is provided with opposite first and second threads which are respectively provided with a first nut and a second nut matched with the threads. The first and the second nuts are respectively fixedly connected with the first and the second brackets. The motor can provide persistent traction force and avoid complicating diseases caused by only once or twice traction per day in the prior art. Automatic traction avoids errors and misoperation of hand operation, enables the traction force to be uniformly distributed, guarantees the static property of a bone-needle interface and reduces the complicating diseases.
Description
[technical field]
This utility model relates to callus lengthening device field.
[background technology]
The callus lengthening art is meant at the inside and outside periosteum of the complete reservation of metaphysis osteotomy overtime, and the mesenchyme of periosteum and interior periosteum has very strong osteogenic ability, by reaching these osteogenic tissues of lasting tractive slowly, gradually, bone is prolonged to keep the limbs balance when making osteotomy place and region of elongation callus formation, transplant and internal fixation and avoid operation for the second time to carry out bone, simultaneously also correct various deformities, as angulation deformity, rotation deformity, soft tissue deformity etc.
Existing callus lengthening device generally is to nail on nail respectively on two osteotomy, then counterweight is hung on the nail, the purpose that bone prolongs is played in gravity stretching by counterweight, but this kind extender has following shortcoming: 1) can not realize continuous traction, thereby make tissue bear bigger pull strength and develop complications; 2) traction strength is inhomogeneous and wayward, and the length that bone is extended differs, and causes patient's body deformity.
[utility model content]
The purpose of this utility model is to provide a kind of callus lengthening device that can provide callus to continue and evenly draw and can avoid producing complication.
The purpose of this utility model is achieved in that this callus lengthening device comprises first, second nail, first, second support, leading screw and motor, first, second support is installed in respectively on first, second nail, the motor turn-screw rotates, and has first, second opposite screw thread of rotation direction on the leading screw, be respectively equipped with first nut and second nut with its threaded engagement on this first, second screw thread, this first, second nut is fixedlyed connected with first, second support respectively.
Described motor also is connected with controller, and this controller is regularly exported pulse control motor and rotated.
On the motor shaft of described motor photoelectric encoder is installed, this photoelectric encoder, motor and controller constitute rotating speed of motor and position feedback loop.
On described first, second support the force transducer that is used to respond to pull strength is installed all, this force transducer, motor and controller constitute the force feedback loop.
Described stent support is also this guide rail slip relatively on guide rail.
All connect between the upper end of described first, second support and between the lower end by elastic component.
The outfan of described motor connects the input of a reducing gear, the outfan turn-screw of reducing gear.
Described leading screw comprises first, second leading screw, one end of first leading screw is installed on the bearing, one end of its other end and second leading screw is affixed, and the other end of second leading screw is connected with the outfan of reducing gear by shaft coupling, and first, second screw thread is located at respectively on first, second leading screw.
Compared with prior art, the utlity model has following advantage: 1), can provide lasting pull strength by the setting of motor, avoid occurring prior art because of every day only once or second traction situation about leading to complications; 2) owing to be automatic traction, the error when having avoided hand-manipulated and improper is evenly distributed pull strength, and the nature static that guarantees bone-pin interface is to reduce the generation of complication; Can produce axial stress in the callus lengthening district when 3) patient bears a heavy burden down, promote growth of spur and moulding.
[description of drawings]
Fig. 1 is the structural representation of this utility model callus lengthening device.
Fig. 2 is the structural representation of second specific embodiment of this utility model callus lengthening device.
Fig. 3 is that nail and support are fixed on the structural representation on the osteotomy.
Fig. 4 is the schematic block circuit diagram in speed of the present utility model and position feedback loop.
Fig. 5 is the schematic block circuit diagram of pull strength feedback circuit of the present utility model.
[specific embodiment]
See also Fig. 1 to Fig. 5, this utility model callus lengthening device comprises nail, support, leading screw, reducing gear and motor.Nail comprises first, second nail 1,2, and it is followed closely respectively to wear and need carry out two osteotomy 3,4 that bone prolongs, and these two osteotomy 3,4 connect by periosteum 5.Support comprises first support 6 and second support 7, this first, second support 6,7 is installed in respectively on first, second nail 1,2, this first, second support 6,7 is the bent frame structure, and the both ends of first, second support 6,7 are fixed on respectively on the corresponding end of first, second nail 1,2.Leading screw comprises that an end of first, second leading screw 8,9, the first leading screws 8 is installed on the rolling bearing 10 so that rotate, and an end of its other end and second leading screw 9 is affixed, and the other end of second leading screw 9 passes through shaft coupling 11 and is connected with the outfan 121 of reducing gear 12.First, second leading screw 8,9 has first, second screw thread 81,91 respectively, the rotation direction of this first, second screw thread 81,91 is opposite, and be separately installed with first nut 82 and second nut 92 on first, second screw thread 81,91 with its threaded engagement, this first nut 81 is fixedlyed connected with first support 6, and second nut 92 is fixedlyed connected with second support 7.The input of reducing gear 12 is connected with the outfan 131 of motor 13, and this reducing gear 12 can be selected existing two-stage large velocity ratio planetary reducer for use.Motor 13 provides whole device power, and himself also has decelerator, and in the present embodiment, this motor 13 is a DC servo motor.In addition, this callus lengthening device also comprises controller 14, and this controller 14 is connected with motor 13, and it is controlled motor 13 by the timed sending pulse signal and realizes accurate the rotation.Certainly, also can only be provided with a rhizoid thick stick, the two ends of this leading screw are respectively equipped with first, second opposite screw thread of rotation direction; But the motor shaft of motor is the integral drive leading screw also.
For the rotating speed and the position of the motor shaft of controlling motor 13, this extender also is provided with photoelectric encoder 15, and this photoelectric encoder 15 is installed on the axle head of motor shaft, and this motor 13, photoelectric encoder 15 and controller 14 formation speed and position feedback loop.In order to control the size of bone overtime pull strength, on this first, second support 6,7 force transducer 16 is installed all, this force transducer 16 is connected with controller 14, and this force transducer 16, motor 13 and controller 14 constitute the pull strength feedback circuit.
The operation principle of present embodiment callus lengthening device is as follows: controller 14 makes motor 13 by certain rotational speed by regularly sending out pulse, the power of motor 13 outputs is by the deceleration and the transmission of reducing gear 12, first, second leading screw 8,9 is rotated simultaneously, then first, second nut 82,92 respectively under the drive of first, second leading screw 8,9 relative to outwards moving, thereby make first, second nail 1,2 relative to outwards moving respectively by first, second support 6,7, promptly realized the purpose that bone prolongs.
In the present embodiment, the total reduction ratio of setting the decelerator of motor self and reducing gear is that the helical pitch that 86400:1, bone prolong 1mm, first, second leading screw every day is 1mm, then only need to control rotating speed of motor be 30 rev/mins to controller, can make first, second leading screw drive first, second support 6,7 respectively relative to the outside 0.5mm of moving 8,9 every days, be equivalent to make bone to prolong 1mm.Because controller sends then motor rotation 1 circle of 10000 pulses each second,, controller sends out 5000 pulses so only needing each second.
Can monitor the rotating speed and the position of motor shaft by photoelectric encoder 15, and this rotating speed and positional information fed back to controller 14, controller 14 compares itself and given speed or position signalling, adjusts by the rotating speed and the position of 14 pairs of motor shafts of controller again.By the setting of force transducer 16, the pull strength signal feedback can be arrived controller 14, thereby adjust rotating speed of motor, so that the pull strength size is in the scope of setting by controller.
In addition, in order to make the suffered pull strength of two osteotomy more even, and be difficult for shaking in distraction procedure, the top and bottom of first, second support 6,7 correspondences all can couple together by elastic component 17, this elastic component such as existing spring.See also Fig. 2, more steady for bone is prolonged, can below support 6,7, guide rail 18 be set, support 6,7 is moved under the guide effect of guide rail 18, thus situation that can the occurrence positions skew when mobile.
Claims (8)
1. callus lengthening device, comprise first, second nail, it is characterized in that: also comprise first, second support, leading screw and motor, first, second support is installed in respectively on first, second nail, the motor turn-screw rotates, and have first, second opposite screw thread of rotation direction on the leading screw, be respectively equipped with first nut and second nut with its threaded engagement on this first, second screw thread, this first, second nut is fixedlyed connected with first, second support respectively.
2. callus lengthening device as claimed in claim 1 is characterized in that: described motor also is connected with controller, and this controller is regularly exported pulse control motor and rotated.
3. callus lengthening device as claimed in claim 2 is characterized in that: on the motor shaft of described motor photoelectric encoder is installed, this photoelectric encoder, motor and controller constitute rotating speed of motor and position feedback loop.
4. as claim 2 or 3 described callus lengthening devices, it is characterized in that: on described first, second support the force transducer that is used to respond to pull strength is installed all, this force transducer, motor and controller constitute the force feedback loop.
5. callus lengthening device as claimed in claim 1 is characterized in that: described stent support is also this guide rail slip relatively on guide rail.
6. callus lengthening device as claimed in claim 1 is characterized in that: all connect by elastic component between the upper end of described first, second support and between the lower end.
7. callus lengthening device as claimed in claim 1 is characterized in that: the outfan of described motor connects the input of a reducing gear, the outfan turn-screw of reducing gear.
8. callus lengthening device as claimed in claim 7, it is characterized in that: described leading screw comprises first, second leading screw, one end of first leading screw is installed on the bearing, one end of its other end and second leading screw is affixed, the other end of second leading screw is connected with the outfan of reducing gear by shaft coupling, and first, second screw thread is located at respectively on first, second leading screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520034942 CN2832080Y (en) | 2005-07-22 | 2005-07-22 | Callus extender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520034942 CN2832080Y (en) | 2005-07-22 | 2005-07-22 | Callus extender |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2832080Y true CN2832080Y (en) | 2006-11-01 |
Family
ID=37196396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520034942 Expired - Fee Related CN2832080Y (en) | 2005-07-22 | 2005-07-22 | Callus extender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2832080Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100558324C (en) * | 2006-11-10 | 2009-11-11 | 重庆大学 | Self controlled intramedullary bone lengthening device |
| CN107518961A (en) * | 2017-08-18 | 2017-12-29 | 上海微创医疗器械（集团）有限公司 | Prosthesis and prosthesis system |
| CN108158640A (en) * | 2018-01-17 | 2018-06-15 | 湖北理工学院 | Self-adjustable outer fixed bone elongation pad |
-
2005
- 2005-07-22 CN CN 200520034942 patent/CN2832080Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100558324C (en) * | 2006-11-10 | 2009-11-11 | 重庆大学 | Self controlled intramedullary bone lengthening device |
| CN107518961A (en) * | 2017-08-18 | 2017-12-29 | 上海微创医疗器械（集团）有限公司 | Prosthesis and prosthesis system |
| CN107518961B (en) * | 2017-08-18 | 2020-09-11 | 上海微创医疗器械（集团）有限公司 | Prosthesis and prosthesis system |
| CN108158640A (en) * | 2018-01-17 | 2018-06-15 | 湖北理工学院 | Self-adjustable outer fixed bone elongation pad |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061101 Termination date: 20120722 |