CN212490112U - Special screw for rib plate - Google Patents
Special screw for rib plate Download PDFInfo
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- CN212490112U CN212490112U CN202021494936.1U CN202021494936U CN212490112U CN 212490112 U CN212490112 U CN 212490112U CN 202021494936 U CN202021494936 U CN 202021494936U CN 212490112 U CN212490112 U CN 212490112U
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Abstract
The utility model belongs to the technical field of medical apparatus, in particular to a special screw for a rib plate, which comprises a screw-in screw and a screw sleeve, wherein the screw-in screw comprises a screw head and a screw rod; the screw sleeve comprises a sleeve body and at least one fixed claw which is rotatably fixed at the bottom of the sleeve body; the screw rod applies force to the fixing claw in the process of screwing in the sleeve body, so that the fixing claw rotates to protrude out of the outer side wall of the sleeve body and is clamped on the rib. The utility model discloses a special screw includes screw in screw and screw sleeve pipe, and the telescopic bottom of screw rotationally fixes at least one stationary dog, makes the screw in-process ejecting to the stationary dog protrusion in the telescopic lateral wall of screw, and the card is established on the rib, and this screw cooperation bar rib board can realize firm fixed, can not oppress intercostal nerve, effectively improves firmness and stability simultaneously.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, concretely relates to special screw of rib board.
Background
The 12 pairs of ribs are equally divided on the two sides of the chest, the front part is connected with the sternum, and the back part is connected with the thoracic vertebra to form a complete thorax. Rib fractures, whether closed or open, are most common in chest injuries, accounting for approximately 90% of thoracic fractures. The ribs of children are elastic and not easy to fracture, while in adults, especially the elderly, the elasticity of the ribs is weakened and the fracture is easy. When the rib is fractured, a rib plate is usually required to be implanted for fixation, so that the bone is healed.
The existing rib plate comprises a C-shaped rib plate (such as the rib plate shown in Chinese patent CN 205286510U) and a strip-shaped rib plate (such as the rib plate shown in Chinese patent CN 110664476A), the holding claws of the C-shaped rib plate surround the two sides of the rib, so that intercostal nerves are easily pressed, postoperative pain of a patient is caused, the strip-shaped rib plate can only be fixed by screws, the fixing firmness and stability are not enough, and once the strip-shaped rib plate is loosened, the fracture healing is not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model discloses a special screw of rib plate, this special screw include screw in screw and screw sleeve pipe, and at least one stationary dog is rotationally fixed to the telescopic bottom of screw, makes the screw in-process ejecting to the stationary dog in the telescopic lateral wall of screw, and the card is established on the rib, and this screw cooperation bar rib plate can realize firm fixed, can not oppress intercostal nerve, effectively improves firmness and stability simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a special screw for rib plate comprises
A screw-in screw comprising a screw head and a screw shaft; and
the screw sleeve comprises a sleeve body and at least one fixed claw which is rotatably fixed at the bottom of the sleeve body;
the screw rod applies force to the fixing claw in the process of screwing in the sleeve body, so that the fixing claw rotates to protrude out of the outer side wall of the sleeve body and is clamped on the rib.
Preferably, two of the fixing claws are provided, and are opened to both sides during screwing of the screw shaft.
Preferably, the bottom of the sleeve body is provided with a groove, and the fixing claw is rotatably fixed in the groove by a fixing pin penetrating through the side wall of the bottom of the sleeve body.
Preferably, the outer side wall of the sleeve body is provided with a section of regular or irregular knurl for increasing the friction force between the sleeve body and the ribs.
Preferably, the screw rod comprises a connecting part, a threaded part and a jacking rod part, two ends of the connecting part are respectively connected with the screw head and the jacking rod part, and the threaded part is arranged at one end of the connecting part close to the jacking rod part and comprises an external thread arranged on the outer side wall of the connecting part;
the sleeve body is provided with two arc-shaped through grooves symmetrically arranged along the circumferential direction of the sleeve body at a position close to the top, so that two symmetrical clamping strips are formed at the top of the sleeve body;
the two clamping strips can be kneaded to be clamped above the external thread under the action of external force, so that the screw sleeve is prevented from falling off when not in threaded connection with a screwed-in screw.
Preferably, the threaded portion further includes a collar protruding from an outer side wall of the connecting portion, and the external thread is disposed on the outer side wall of the collar; the two clamping strips can be kneaded to be clamped above the ring table under the action of external force.
Preferably, the diameter of the shank portion is smaller than the diameter of the screw portion.
Preferably, the sleeve body is provided with a partition plate above the groove, and a through hole is formed in the center of the partition plate, so that the ejector rod part can conveniently penetrate through and contact with the fixing claw.
Preferably, the bottom edge of the ejector rod part is provided with an arc chamfer, and the fixing claw is of a triangular structure with three corners provided with the arc chamfers.
Preferably, the screw-in screw can be screwed into the screw sleeve by 0-4mm until the fixing claws are fully opened.
Preferably, the length of the screw-in screw is arranged in a gradient manner, so that the screw-in screw can be conveniently adapted to ribs with different thicknesses.
Preferably, the top of the screw head is provided with an inner hexagonal groove.
The utility model discloses following beneficial effect has:
(1) the special screw comprises a screw-in screw and a screw sleeve, at least one fixed claw is rotatably fixed at the bottom of the screw sleeve, so that the fixed claw can be ejected out to protrude out of the outer side wall of the screw sleeve in the screw-in process of the screw-in screw and is clamped on the rib, the screw can be firmly fixed by matching with the strip rib plate, the intercostal nerve can not be pressed, and simultaneously, the firmness and the stability are effectively improved;
(2) the rib fracture not only comprises calcified hard rib fracture, but also comprises costal cartilage fracture, the costal cartilage is composed of transparent cartilage, the holding force of the screw is very small, the screw can be easily loosened only by screw fixation, the screw can be used for clamping the costal cartilage from the back through the fixing claw, the problem of low holding force of the costal cartilage to the screw is not needed to be worried, and the firm fixation of the costal plate is effectively realized;
(3) the two fixing claws of the utility model are respectively opened towards two sides in the screwing process of the screw rod, can be firmly clamped on the rib, and has high firmness;
(4) the outer side wall of the sleeve body of the utility model is provided with a section of regular or irregular knurl which is beneficial to improving the friction force between the sleeve body and the skeleton and preventing the sleeve body from rotating along with the screw rod in the process of screwing in the screw rod;
(5) the screw thread part of the utility model is a ring platform which is formed outside the connecting part and protrudes out of the outer side wall of the connecting part, two symmetrical clamping strips are arranged at the top of the sleeve body, and the two clamping strips are kneaded to be clamped on the ring platform of the screw thread part, so that a screwed-in screw and a screw sleeve are connected together, and the loss of parts can be effectively avoided, moreover, the design of the structure can also effectively prevent the screw sleeve from falling into the thoracic cavity due to over-high force in the process of putting in and taking out the screw by a doctor;
(6) the utility model discloses when opening completely to the stationary dog in screw sleeve pipe, the screw in screw still can continue screw in 0-4mm, the length of screw in screw is the gradient setting, to thinner rib, select the less screw of length, to thicker rib, select the great screw of length, when the stationary dog opens completely, if the screw has still failed to screw to screwhead laminating rib lamella, the screw in screw still can continue the screw in to screwing up completely, adopt the gradient setting, can avoid ejector pin portion protrusion too many and take place the friction with the tissue, cause the discomfort for the patient, the utility model discloses a screw is applicable to the screw of different thickness.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic structural view of a screw dedicated to a rib plate according to the present invention;
FIG. 2 is a schematic view of the use of the screw dedicated for rib plates of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of the special screw for rib plate of the present invention in a locked state;
FIG. 5 shows the state of the screw-in screw of the present invention screwed into the screw casing until the fixing claw is completely opened;
in the figure: 1. screwing in the screw; 11. a screw head; 111. an inner hexagonal groove; 12. a screw shaft; 121. a connecting portion; 122. a threaded portion; 123. a top rod part; 2. a screw grommet; 21. a sleeve body; 211. a groove; 212. a fixing pin; 213. knurling; 214. an arc-shaped through groove; 215. clamping the strip; 216. a partition plate; 22. a fixed jaw; 8. a costal plate; 9. ribs.
Detailed Description
The present invention will now be described in further detail with reference to examples.
A special screw for a rib plate is shown in figures 1-4 and comprises a screw-in screw 1 and a screw sleeve 2, wherein the screw-in screw 1 comprises a screw head 11 and a screw rod 12; the screw grommet 2 includes a grommet body 21 and at least one fixing jaw 22 rotatably fixed to the bottom of the grommet body 21; the screw rod 12 applies force to the fixing claw 22 in the process of screwing into the sleeve body 21, so that the fixing claw 22 rotates to protrude out of the outer side wall of the sleeve body 21 and is clamped on the rib 9. The rib 9 is clamped from the back of the rib by the fixing claws 22, and the rib plate with the strip shape as shown in fig. 2 can be firmly fixed with the rib and the costal cartilage, so that the stability is improved.
In one embodiment, as shown in FIGS. 3-4, two of the fixation claws 22 are provided, each of which opens out to either side during the threading of the screw shaft 12. The two fixing claws 22 are respectively opened towards two sides, so that the fixing claws can be firmly clamped on the ribs 9, and the firmness is high.
In a specific embodiment, as shown in fig. 1, the bottom of the sleeve body 21 is provided with a groove 211, and the fixing claw 22 is rotatably fixed in the groove 211 by a fixing pin 212 penetrating through a bottom side wall of the sleeve body 21.
In a specific embodiment, as shown in fig. 1, the outer sidewall of the sleeve body 21 is provided with a regular or irregular knurl 213 for increasing the friction between the sleeve body 21 and the rib 9. The knurling 213 is provided to improve the friction between the sleeve body 21 and the bone and to prevent the sleeve body 21 from rotating with the screw shaft 12 during screwing into the screw shaft 12.
In one embodiment, a drill is used for drilling a through hole with the diameter slightly smaller than the outer diameter of the knurls on the rib, then the special screw is inserted into the through hole by force, the knurls can increase the friction force between the special screw and the bone, and the screw sleeve 2 is placed to rotate along with the special screw.
In a specific embodiment, as shown in fig. 1 and 3, the screw rod 12 includes a connecting portion 121, a threaded portion 122 and a top rod portion 123, two ends of the connecting portion 121 are respectively connected with the screw head 11 and the top rod portion 123, the threaded portion 122 is disposed at one end of the connecting portion 121 close to the top rod portion 123 and includes an external thread disposed on an outer side wall of the connecting portion 121; the sleeve body 21 is provided with two arc-shaped through grooves 214 symmetrically arranged along the circumferential direction of the sleeve body 21 at a position close to the top, so that two symmetrical clamping strips 215 are formed at the top of the sleeve body 21; the two clamping strips 215 can be kneaded to be clamped above the external thread under the action of external force, so that the screw sleeve 2 is prevented from falling off when not in threaded connection with the screwed-in screw 1. Kneading two card strips 215 to the card and establishing in the external screw thread top of screw portion 122, making screw in 1 and screw sleeve pipe 2 link together, can effectively avoid the part to lose, moreover, the design of this structure can also effectively prevent the doctor in the in-process of putting into the screw and taking out the screw because the power is too big and lead to screw sleeve pipe 2 to drop into the thorax.
In a specific embodiment, as shown in fig. 3, the threaded portion 122 further includes a ring platform protruding from an outer side wall of the connecting portion 121, and the external thread is disposed on the outer side wall of the ring platform; the two clamping strips 215 can be kneaded to be clamped above the ring platform under the action of external force. The clamping strip 215 may not be firmly clamped due to the small height of the external thread, and therefore, the ring platform is arranged, so that the clamping strip 215 is favorably and firmly clamped on the ring platform. In an embodiment, the height of the ring platform protruding from the connection portion 121 may be 0.2-1 mm.
In a particular embodiment, as shown in fig. 3-4, the diameter of the shank portion 123 is smaller than the diameter of the threaded portion 122.
In one embodiment, as shown in fig. 3-4, the sleeve body 21 is provided with a partition 216 above the recess 211, and the partition 216 is provided with a through hole at the center thereof to facilitate the insertion of the stem 123 through and into contact with the fixing jaw 22. The arrangement of the partition plate 216 can increase the contact surface of the fixed claw 22 and the sleeve body 21, and improve the stability.
In a specific embodiment, as shown in fig. 3, the bottom edge of the stem portion 123 has a rounded chamfer, and the holding claw 22 has a triangular structure with rounded chamfers at three corners.
In a specific embodiment, as shown in fig. 5, when the screw-in screw 1 is screwed into the screw grommet 2 until the fixing jaw 22 is fully opened, the screw-in screw 1 can be screwed in 0-4 mm. The distance that the screw 1 is screwed in to protrude beyond the bottom of the sleeve body 21 is generally not more than 1mm, otherwise the pleura may be punctured. When the fixing claw 22 is completely opened, the screwing-in screw 1 is continuously screwed in for a distance not more than 4mm, and the screwing-in screw 1 is prevented from protruding too much to puncture the pleura.
In a specific embodiment, the length of the screw 1 is arranged in a gradient so as to adapt to ribs 9 with different thicknesses.
The thickness of the ribs of different persons or even the same rib of the same person is very different, generally within the range of 4.5-15mm, if the screw is designed according to the maximum rib thickness, the screwed screw 1 may protrude from the bottom of the sleeve body 21 to a greater extent, therefore, the length of the screwed screw 1 may be set in a gradient manner, for example, the screwed screw 1 may be screwed to protrude from the groove 211 by 2mm to completely open the fixing claw 22, and the thickness of the rib plate is 2mm, the total length of the screwed screw 1 may be set to 8.5-11mm, 10-13mm, 12-15.5mm, 14-18mm, and the ribs with various thicknesses may be covered. For thinner ribs 9, a smaller length screw may be selected, for thicker ribs a longer length screw may be selected, and when the fixation jaw 22 is fully expanded, if the screw has not been tightened until the head of the screw abuts the rib plate, the screw 1 may continue to be tightened until fully tightened, securing the rib plate 8 to the rib 9. By adopting the gradient arrangement, the situation that the top rod part 123 protrudes too much to puncture the pleura can be avoided.
In a specific embodiment, as shown in fig. 1, the top of the screw head 11 is provided with an inner hexagonal groove 111. The socket head cap screw tool can be directly used.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (12)
1. A special screw for a rib plate is characterized in that: comprises that
A screw-in screw (1), the screw-in screw (1) comprising a screw head (11) and a screw shaft (12); and
the screw sleeve (2) comprises a sleeve body (21) and at least one fixed claw (22) which is rotatably fixed at the bottom of the sleeve body (21);
the screw rod (12) applies force to the fixing claw (22) in the process of screwing in the sleeve body (21), so that the fixing claw (22) rotates to protrude out of the outer side wall of the sleeve body (21) and is clamped on the rib (9).
2. The screw dedicated for rib plates of claim 1, wherein: the two fixing claws (22) are respectively opened towards two sides in the screwing process of the screw rod (12).
3. The screw dedicated for rib plates of claim 1, wherein: the bottom of sleeve pipe body (21) is equipped with recess (211), stationary dog (22) rotationally fix in recess (211) through wearing to establish fixed pin (212) on the bottom lateral wall of sleeve pipe body (21).
4. The screw dedicated for rib plates of claim 1, wherein: the outer side wall of the sleeve body (21) is provided with a section of knurl (213) for increasing the friction force between the sleeve body (21) and the ribs (9).
5. The screw dedicated for rib plates of claim 3, wherein: the screw rod (12) comprises a connecting part (121), a threaded part (122) and an ejector rod part (123), two ends of the connecting part (121) are respectively connected with the screw head (11) and the ejector rod part (123), and the threaded part (122) is arranged at one end, close to the ejector rod part (123), of the connecting part (121) and comprises an external thread arranged on the outer side wall of the connecting part (121);
the sleeve body (21) is provided with two arc-shaped through grooves (214) which are symmetrically arranged along the circumferential direction of the sleeve body (21) at a position close to the top, so that two symmetrical clamping strips (215) are formed at the top of the sleeve body (21);
the two clamping strips (215) can be kneaded to be clamped above the external threads under the action of external force, so that the screw sleeve (2) is prevented from falling off when not in threaded connection with the screwed-in screw (1).
6. The screw dedicated for rib plates of claim 5, wherein: the threaded part (122) further comprises a ring platform protruding out of the outer side wall of the connecting part (121), and the external thread is arranged on the outer side wall of the ring platform; the two clamping strips (215) can be kneaded to be clamped above the ring platform under the action of external force.
7. The screw dedicated for rib plates of claim 5, wherein: the diameter of the ejector rod part (123) is smaller than that of the threaded part (122).
8. The screw dedicated for rib plates of claim 7, wherein: the sleeve body (21) is provided with a partition plate (216) above the groove (211), and a through hole is formed in the center of the partition plate (216) so that the ejector rod part (123) can conveniently penetrate through and contact the fixed claw (22).
9. The screw dedicated for rib plates of claim 5, wherein: the bottom edge of the ejector rod part (123) is provided with an arc chamfer, and the fixed claw (22) is of a triangular structure with three corners provided with the arc chamfers.
10. The screw dedicated for rib plates of claim 5, wherein: when the screwing screw (1) is screwed into the screw sleeve (2) until the fixing claw (22) is completely opened, the screwing screw (1) can still be screwed into the screw sleeve by 0-4 mm.
11. The screw dedicated for rib plates of claim 10, wherein: the length of the screwed screw (1) is arranged in a gradient manner, so that the screwed screw is convenient to adapt to ribs (9) with different thicknesses.
12. The screw dedicated for rib plates of claim 1, wherein: the top of the screw head (11) is provided with an inner hexagonal groove (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021494936.1U CN212490112U (en) | 2020-07-24 | 2020-07-24 | Special screw for rib plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021494936.1U CN212490112U (en) | 2020-07-24 | 2020-07-24 | Special screw for rib plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212490112U true CN212490112U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021494936.1U Active CN212490112U (en) | 2020-07-24 | 2020-07-24 | Special screw for rib plate |
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| CN (1) | CN212490112U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113967061A (en) * | 2020-07-24 | 2022-01-25 | 常州华森医疗器械有限公司 | Special screw for rib plate |
-
2020
- 2020-07-24 CN CN202021494936.1U patent/CN212490112U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113967061A (en) * | 2020-07-24 | 2022-01-25 | 常州华森医疗器械有限公司 | Special screw for rib plate |
| CN113967061B (en) * | 2020-07-24 | 2024-08-02 | 常州华森医疗器械股份有限公司 | Special screw for rib plate |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213000 No.5 Longxiang Road, Nanxiashu street, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee after: Changzhou Huasen Medical Instrument Co.,Ltd. Address before: 213000 No.5 Longxiang Road, Nanxiashu street, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU WASTON MEDICAL APPLIANCE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |