CN215228313U - Nail tail breaking device - Google Patents
Nail tail breaking device Download PDFInfo
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- CN215228313U CN215228313U CN202121749582.5U CN202121749582U CN215228313U CN 215228313 U CN215228313 U CN 215228313U CN 202121749582 U CN202121749582 U CN 202121749582U CN 215228313 U CN215228313 U CN 215228313U
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Abstract
The utility model belongs to the technical field of the medical instrument technique and specifically relates to a nail tail fracturer. A through core tube is arranged in a handle of the nail tail breaker, one end of the core tube is connected with one end of an outer sleeve, the other end of the outer sleeve is connected with a breaking head, the breaking head comprises a first section, a second section and a third section which are sequentially connected from top to bottom, the first section is parallel to the third section, the second section is obliquely arranged from the first section to the third section, a push rod moving hole is formed in the breaking head, the push rod moving hole extends from the first section to the third section, a cavity is arranged on the lower end face of the breaking head upwards, a clamping piece is arranged on the side wall of the breaking head corresponding to the cavity, a push rod through hole is formed between the top face of the cavity and the bottom of the push rod moving hole, and the lower end of a push rod sequentially penetrates through the core tube, the outer sleeve, the first section and the second section of the breaking head and then is inserted into the push rod through hole. The utility model has the advantages of reasonable design, the range of operation is little, can not shelter from the sight in the operation process, can release from the nail tail breaker rapidly after the nail tail breaks.
Description
Technical Field
The utility model belongs to the technical field of the medical instrument technique and specifically relates to a nail tail fracturer.
Background
The long-tail pedicle screw used clinically loses the function after the screw tail is screwed into the tail cap. In order to reduce the cutting mark of the screw, the tail of the screw needs to be broken and taken out. Most operating rooms in hospitals are broken by using vices or splint pincers, the tail of the clamping nail of the tools is inconvenient to operate due to the thick head, the force application direction is not easy to control, the supporting point is not easy to hold, and the loosening of the pedicle screw and the damage of surrounding tissues are easily caused.
In order to solve the technical problem, technicians design a tail nail breaker, for example, a pedicle screw tail wing breaker disclosed in the authorization of Chinese patent CN201734765U, the technology comprises a breaker body, a sliding screw is arranged on a sliding groove arranged on the breaker body, two wing clamping tongues connected to the inner side of the breaker body are arranged above and below the sliding screw, and a nut is arranged on one side of the sliding screw; the fracturer body is provided with an operating handle and a tail fin cuff. Because the technology is provided with the wing clamping tongue and the tail wing sleeve opening, the supporting point in the breaker is used, so that the tail wing is not easy to damage in the using process and is easy to master and control.
The existing nail tail breakers have some defects in clinical use, such as: (1) the structure design is unreasonable, the action amplitude is large during operation, the sight is shielded in the operation process, and the operation accuracy is influenced; (2) the nail tail is not convenient to take out after being broken; (3) after the local damage, the whole breaker is scrapped and the local part cannot be replaced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a nail tail breaker overcomes the not enough of aforementioned prior art, and structural design is reasonable, and the range of operation is little, can not shelter from the sight in the operation process, can release from nail tail breaker rapidly after the nail tail is broken off, can carry out local change to the breaker.
The utility model provides a technical scheme that its technical problem adopted is:
a nail tail breaking device comprises a handle, an outer sleeve, a push rod and a breaking head, wherein a through core tube is arranged in the handle, one end of the core tube is connected with one end of the outer sleeve, the other end of the outer sleeve is connected with the breaking head, the breaking head comprises a first section, a second section and a third section which are sequentially connected from top to bottom, the first section is parallel to the third section, the second section is obliquely arranged from the first section to the third section, a push rod moving hole is formed in the breaking head, the push rod moving hole extends from the first section to the third section, a cavity is formed in the lower end face of the breaking head, a clamping piece is arranged on the side wall of the breaking head corresponding to the cavity, a push rod through hole is formed between the top surface of the cavity and the bottom of the push rod moving hole, the lower end of the push rod sequentially penetrates through the core tube, the outer sleeve, the first section and the second section of the breaking head and then is inserted into the push rod through hole, and the shape of the lower end of the push rod is matched with the shape of the breaking head, the upper end of the push rod is positioned outside the handle and connected with the button, a limit ring is arranged on the push rod section positioned above the outer sleeve, and a spring is arranged between the limit ring and the push rod; when the spring naturally extends out, the lower end of the push rod is positioned in the push rod movable hole, and when the push button spring is compressed, the lower end of the push rod is pushed into the cavity; when the nail tail breaker uses, aim at the nail tail of pedicle of vertebral arch screw with the cavity, make the nail tail insert in the cavity, the clamping piece will be followed closely the tail centre gripping, break the handle off with the fingers and thumb, the nail tail is broken, because the structural design form that the parallel middle part in both ends inclined about the rupture head set up, make the in-process range of operation of breaking the tail nail little, the manipulation realization is not sheltered from, it breaks the ware to shift out the tail nail, press the button, the spring shrink, price nail tail is released in the push rod pushes the cavity, loosen the button, the push rod is automatic re-setting under the effect of spring.
Furthermore, the bending angle alpha between the first section and the second section of the breaking head is 120-160 degrees, sight line shielding is not generated in most operations in the angle range, and the operation amplitude is small in the process of breaking the tail nail by combining the shapes of the first section, the second section and the third section.
Furthermore, the push rod is an elastic rod body, so that the push rod can be conveniently pushed into the cavity.
Furthermore, the push rod includes first push rod and second push rod, first push rod and second push rod threaded connection, and the stopper sets up in the outer wall lower extreme of first push rod, is convenient for change first push rod and second push rod alone.
Furthermore, the outer sleeve is in threaded connection with the inner core tube of the handle, so that the outer sleeve is convenient to replace.
Furthermore, the outer sleeve is in threaded connection with the upper end of the breaking head, so that the breaking head is convenient to replace.
Furthermore, the push rod is in threaded connection with the button, so that the button is convenient to replace.
Furthermore, the thickness of the cavity is in clearance fit with the thickness of the side wall of the screw tail of the pedicle screw, so that the screw tail can be conveniently and smoothly inserted into the cavity.
Furthermore, the two clamping pieces are symmetrically arranged along the two side walls of the fracture head, the distance between the two clamping pieces is in interference fit with the thickness of the side wall of the nail tail of the pedicle screw, and the nail tail is guaranteed to be stably clamped when the nail tail is fractured early and the nail tail breaker is taken out.
Further, the pedicle screw is a long-tail screw.
The utility model has the advantages that: compared with the prior art, the utility model discloses a nail tail fracturer has following advantage: (1) due to the structural design form that the upper end and the lower end of the breaking head are parallel to the middle part and are obliquely arranged, the operation range is small in the process of breaking the tail nail, and the operation is not shielded; (2) the button is pressed after the tail nail breaker is moved out, the spring contracts, the push rod is pushed into the cavity to push out the tail of the valuable nail, the button is released, and the push rod automatically resets under the action of the spring; (3) each component can be independently changed, and the cost is saved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic cross-sectional view of the structure A-A' of FIG. 2 according to the present invention;
FIG. 4 is a schematic structural view of the breaking head of the present invention;
fig. 5 is another angle structure diagram of the breaking head of the present invention;
fig. 6 is a schematic structural view of the push rod of the present invention;
the special tool comprises a handle 1, an outer sleeve 2, a push rod 3, a first push rod 301, a second push rod 302, a limit ring 303, a broken head 4, a first section 401, a second section 402, a third section 403, a push rod movable hole 404, a cavity 405, a clamping piece 406, a push rod perforation 407, a core tube 5, a button 6, a spring 7, a pedicle screw 8 and a nail tail 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.
In the embodiment shown in fig. 1-6, a nail tail breaker comprises a handle 1, an outer sleeve 2, a push rod 3 and a breaking head 4, wherein a through core tube 5 is arranged in the handle 1, one end of the core tube 5 is connected with one end of the outer sleeve 2, the other end of the outer sleeve 2 is connected with the breaking head 4, the breaking head 4 comprises a first section 401, a second section 402 and a third section 403 which are sequentially connected from top to bottom, the first section 401 is parallel to the third section 403, the second section 402 is obliquely arranged from the first section 401 to the third section 403, a push rod moving hole 404 is arranged on the breaking head 4, the push rod moving hole 404 extends from the first section 401 to the third section 403, a cavity 405 is arranged on the lower end of the breaking head 4 in an upward direction, a clamping piece 406 is arranged on the side wall of the breaking head 4 corresponding to the cavity 405, a push rod through hole 407 is arranged between the top surface of the cavity 405 and the bottom of the push rod moving hole 404, and the lower end of the push rod 3 sequentially passes through the core tube 5, the second section 401, the third section 403, the clamping piece 406 is arranged on the side wall of the breaking head 4, and the clamping piece, the clamping piece 406, the clamping piece is arranged on the side wall of the clamping piece, and the clamping piece is arranged on the clamping piece, and the clamping piece, the clamping piece is arranged on the clamping piece, and the clamping piece, the clamping piece is arranged on the clamping piece, and the clamping piece, the clamping piece is arranged on the clamping piece, and the clamping piece, the clamping piece is arranged on the clamping piece, the clamping piece is arranged on the clamping piece, and the clamping piece is arranged on the clamping piece, the clamping piece is arranged on the clamping piece arranged on the side, and the clamping piece arranged on the side, and the side of the clamping piece arranged on the side of the clamping piece arranged on the, The outer sleeve 2, the first section 401 and the second section 402 of the breaking head 4 are inserted into the push rod through hole 407, the shape of the lower end of the push rod 3 is matched with the shape of the breaking head 4, the upper end of the push rod 3 is positioned outside the handle 1 and connected with the button 6, the rod section of the push rod 3 positioned above the outer sleeve 2 is provided with a limit ring 303, and a spring 7 is arranged between the limit ring 303 and the push rod 3; when the spring 7 naturally extends out, the lower end of the push rod 3 is positioned in the push rod movable hole 404, the button 6 is pressed, and when the spring 7 is compressed, the lower end of the push rod 3 is pushed into the cavity 405; when the nail tail breaker is used, the cavity 405 is aligned to the nail tail 9 of the pedicle screw 8, the nail tail 9 is inserted into the cavity 405, the clamping piece 406 clamps the nail tail, the handle 1 is broken off, the nail tail 9 is broken off, due to the structural design form that the parallel middle parts of the upper end and the lower end of the breaking head 4 are obliquely arranged, the operation range of the broken tail nail is small, the operation is free from shielding, the broken tail nail breaker is moved out, the button 6 is pressed, the spring 7 contracts, the price nail tail in the cavity 405 is pushed into the push rod 3, the button 6 is released, and the push rod 3 automatically resets under the action of the spring 7.
In this embodiment, the bending angle α between the first section 401 and the second section 402 of the fracture head 4 is 120-160 °, and most of the operations in the angle range are not shielded by sight, and the operation amplitude is small in the process of breaking the tail nail by combining the shapes of the first section 401, the second section 402 and the third section 403.
In this embodiment, the push rod 3 is an elastic rod body, and is convenient to push into the cavity 405.
In this embodiment, the push rod 3 includes a first push rod 301 and a second push rod 302, the first push rod 301 is connected with the second push rod 302 by screw thread, and the limiting block is disposed at the lower end of the outer wall of the first push rod 301, so that the first push rod 301 and the second push rod 302 can be replaced separately.
In this embodiment, the outer sleeve 2 is in threaded connection with the inner core tube 5 of the handle 1, so that the outer sleeve 2 can be replaced conveniently.
In this embodiment, the outer sleeve 2 is in threaded connection with the upper end of the break head 4, so that the break head 4 can be replaced conveniently.
In this embodiment, the push rod 3 is connected with the button 6 by screw threads, so that the button 6 can be replaced conveniently.
In this embodiment, the thickness of the cavity 405 is in clearance fit with the thickness of the side wall of the nail tail of the pedicle screw 8, so that the nail tail can be smoothly inserted into the cavity 405.
In this embodiment, two clamping pieces 406 are symmetrically arranged along two side walls of the fracture head 4, and the distance between the two clamping pieces 406 is in interference fit with the thickness of the side wall of the nail tail of the pedicle screw 8, so as to ensure stable clamping of the nail tail when the nail tail is fractured early and the nail tail breaker is taken out.
In this embodiment, the pedicle screw 8 is a long-tail screw.
The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the forms and styles of the above embodiments, and any suitable changes or modifications made thereto by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a nail tail fracturer which characterized in that: the handle is internally provided with a through core tube, one end of the core tube is connected with one end of the outer sleeve, the other end of the outer sleeve is connected with the breaking head, the breaking head comprises a first section, a second section and a third section which are sequentially connected from top to bottom, the first section is parallel to the third section, the second section is obliquely arranged from the first section to the third section, the breaking head is provided with a push rod moving hole, the push rod moving hole extends from the first section to the third section, the lower end of the breaking head faces upwards and is provided with a cavity, a clamping piece is arranged on the side wall of the breaking head corresponding to the cavity, a push rod through hole is arranged between the top surface of the cavity and the bottom of the push rod moving hole, the lower end of the push rod sequentially penetrates through the core tube, the outer sleeve, the first section and the second section of the breaking head and then is inserted into the push rod through hole, the shape of the lower end of the push rod is matched with the shape of the breaking head, and the upper end of the push rod is positioned outside the handle and connected with a button, a limit ring is arranged on the push rod section above the outer sleeve, and a spring is arranged between the limit ring and the push rod.
2. A nail tail breaker according to claim 1, wherein: the bending angle alpha between the first section and the second section of the breaking head is 120-160 degrees.
3. A nail tail breaker according to claim 1, wherein: the push rod is an elastic rod body.
4. A nail tail breaker according to claim 1, wherein: the push rod includes first push rod and second push rod, first push rod and second push rod threaded connection, and the stopper sets up in the outer wall lower extreme of first push rod.
5. A nail tail breaker according to claim 1, wherein: the outer sleeve is in threaded connection with the inner core pipe of the handle.
6. A nail tail breaker according to claim 1, wherein: the outer sleeve is in threaded connection with the upper end of the breaking head.
7. A nail tail breaker according to claim 1, wherein: the push rod is in threaded connection with the button.
8. A nail tail breaker according to claim 1, wherein: the thickness of the cavity is in clearance fit with the thickness of the side wall of the pedicle screw at the tail part.
9. A nail tail breaker according to claim 1, wherein: the two clamping pieces are symmetrically arranged along the two side walls of the broken head, and the distance between the two clamping pieces is in interference fit with the thickness of the side wall of the pedicle screw tail.
10. A nail tail breaker according to claim 8 or 9, wherein: the pedicle screw is a long-tail screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121749582.5U CN215228313U (en) | 2021-07-29 | 2021-07-29 | Nail tail breaking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121749582.5U CN215228313U (en) | 2021-07-29 | 2021-07-29 | Nail tail breaking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215228313U true CN215228313U (en) | 2021-12-21 |
Family
ID=79495685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121749582.5U Active CN215228313U (en) | 2021-07-29 | 2021-07-29 | Nail tail breaking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215228313U (en) |
-
2021
- 2021-07-29 CN CN202121749582.5U patent/CN215228313U/en active Active
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