CN209808500U - Medical screw capable of rotating at multiple angles - Google Patents
Medical screw capable of rotating at multiple angles Download PDFInfo
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- CN209808500U CN209808500U CN201920395904.7U CN201920395904U CN209808500U CN 209808500 U CN209808500 U CN 209808500U CN 201920395904 U CN201920395904 U CN 201920395904U CN 209808500 U CN209808500 U CN 209808500U
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- screw
- limiting device
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- screw seat
- limiting
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Abstract
The utility model belongs to the technical field of medical utensil of orthopedics internal fixation, concretely relates to but medical screw of multi-angle rotating. This medical screw includes: the screw comprises a screw seat, a screw body with a spherical head and a limiting device; wherein the nail body is clamped in the screw seat through the spherical head; the limiting device is arranged in the screw seat through extrusion so as to prevent the nail body and the limiting device from being separated from the upper end opening of the screw seat. This medical screw passes through extrusion mode installation stop device to stop device can only remove and can not rotate in the screw base, and stop device is difficult for deviating from screw base cooperation department.
Description
Technical Field
The utility model belongs to the technical field of medical utensil of orthopedics internal fixation, concretely relates to but medical screw of multi-angle rotating.
Background
The pedicle screw is mainly used for internal fixation of spondylolisthesis, vertebral malformation correction, vertebral degenerative change, vertebral malformation correction and the like in orthopedic operations.
At present, the limiting device and the screw seat are assembled in a riveting mode on the market, and the riveting assembling mode has the following defects: easily cause the limiting device to be separated from the matched part of the screw seat.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but multi-angle rotating's medical screw to solve stop device from the technical problem who easily deviates from with screw seat cooperation department.
In order to solve the technical problem, the utility model provides a but multi-angle rotating's medical screw, include:
the screw comprises a screw seat, a screw body with a spherical head and a limiting device; wherein
The nail body is clamped in the screw seat through the spherical head;
the limiting device is arranged in the screw seat through extrusion so as to prevent the nail body and the limiting device from being separated from the upper end opening of the screw seat.
Further, the limiting device is a saddle type limiting device; namely, it is
The limiting device is characterized in that the two sides of the limiting device are saddle bridge parts, sliding grooves for assembling with the inner wall of the screw seat are formed in the outer side wall of the saddle bridge part, and first limiting parts are arranged in the sliding grooves to prevent the screw body and the limiting device from being separated from an upper end opening of the screw seat.
Further, the limiting device is a circular ring type limiting device; namely, it is
The outer side wall of the limiting device is symmetrically provided with sliding grooves for assembling with the inner wall of the screw seat, and first limiting parts are arranged in the sliding grooves to prevent the screw body and the limiting device from being separated from an upper end opening of the screw seat.
Furthermore, the bottom of the limiting device is provided with an inner concave part matched with the spherical head of the nail body.
Further, the inner walls of two sides of the screw seat are respectively and symmetrically provided with a second limiting part;
when the limiting device is installed inside the screw seat through extrusion, the second limiting part is clamped in the sliding groove to limit the first limiting part so as to prevent the limiting device from rotating in the screw seat.
Further, after the limiting device is installed inside the screw seat through extrusion, a movable gap is reserved between the first limiting part and the second limiting part.
Furthermore, the screw seat is provided with a U-shaped groove suitable for placing spinal rods.
Furthermore, the screw seat is provided with a blind hole and a notch which are suitable for being matched with a resetting instrument and are symmetrically arranged;
the blind holes are formed in two sides perpendicular to the opening direction of the U-shaped groove;
the notch is arranged on the groove wall of the U-shaped groove.
Further, a self-tapping groove is formed in the lower end of the nail body;
the self-tapping groove is suitable for reducing the resistance of the pedicle screw in a human body.
Further, the upper end of the round head of the nail body is provided with an anti-skid step;
the antiskid steps prevent the screw body from rotating in the screw seat.
The beneficial effects of the utility model are that, the utility model discloses a but multi-angle rotating's medical screw is through being provided with stop device to adopt the extrusion to install inside the screw seat, deviate from the upper end opening of screw seat with the stop nail body and stop device. When the medical screw is used for operations such as spinal deformity correction and spinal deformity correction, the medical screw is used for fixation, and the safety and reliability of the operations are improved.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a perspective view of a first embodiment of a medical screw of the present invention;
fig. 2 is an exploded view of a first embodiment of a medical screw of the present invention;
fig. 3 is a partial cross-sectional view of a first embodiment of a medical screw of the present invention;
fig. 4 is a schematic view of a stop device according to a second embodiment of the medical screw of the present invention.
In the figure:
the nail body 1, the self-tapping groove 101, the antiskid step 102, the hexagonal recess 103, the stop device 2, the saddle bridge portion 201, first spacing portion 202a, 202b, interior recess 203, the screw seat 3, the blind hole 301, breach 302, U type groove 303, the spacing portion of second 304.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Example 1
Fig. 1 is a perspective view of a first embodiment of a medical screw of the present invention;
fig. 2 is an exploded view of a first embodiment of a medical screw of the present invention;
fig. 3 is a partial cross-sectional view of a first embodiment of a medical screw of the present invention;
as shown in fig. 1 to 3, the present embodiment provides a medical screw capable of rotating at multiple angles, including: the screw comprises a screw seat 3, a screw body 1 with a spherical head and a limiting device 2; wherein the nail body 1 is clamped in the screw seat 3 through the spherical head; the limiting device 2 is installed inside the screw seat 3 through extrusion so as to prevent the nail body 1 and the limiting device 2 from being separated from the upper end opening of the screw seat 3. The medical screw solves the problem that the existing limiting device of the medical screw is easy to be separated from the matching part of the screw seat.
In this embodiment, the limiting device 2 is a saddle type limiting device; namely, the saddle bridge part 201 is arranged on both sides of the stopper 2, a sliding groove for assembling with the inner wall of the screw seat 3 is formed on the outer side wall of the saddle bridge part 201, and a first stopper part 202a is arranged in the sliding groove to prevent the nail body 1 and the stopper 2 from being separated from the upper end opening of the screw seat 3.
Further, the bottom of the limiting device 2 is provided with an inner concave part 203 matched with the spherical head of the nail body 1.
In this embodiment, the inner walls of the two sides of the screw seat 3 are symmetrically provided with second limiting portions 304; when the position-limiting device 2 is installed inside the screw base 3 by pressing, the second position-limiting portion 304 is caught in the sliding groove to limit the first position-limiting portion 202a, so as to prevent the position-limiting device 2 from rotating in the screw base 3 and prevent the position-limiting device 2 from coming out of the screw base 3.
Further, when the position limiting device 2 is installed inside the screw seat 3 by pressing, a movable gap is left between the first position limiting portion 202a and the second position limiting portion 304, and when the spinal rod is pressed in, the position limiting device 2 can slide to adjust to an optimal position.
In this embodiment, the screw seat 3 is provided with a U-shaped groove 303 suitable for placing a spinal rod, and the radian of the bottom of the U-shaped groove 303 is matched with the saddle-shaped radian of the limiting device 2.
In this embodiment, the screw seat 3 is provided with a blind hole 301 and a notch 302 which are suitable for matching with a resetting instrument and are symmetrically arranged; the blind holes 301 are formed in two sides perpendicular to the opening direction of the U-shaped groove 303; the notch 302 is arranged on the wall of the U-shaped groove 303. Wherein, the resetting apparatus is a resetting clamp, a swinging clamp and other surgical tools.
In this embodiment, the lower end of the nail body 1 is provided with a self-tapping groove 101; the self-tapping groove 101 is adapted to reduce resistance of the pedicle screw into the human body.
Further, the upper end of the round head of the nail body 1 is provided with an anti-skid step 102; the anti-slip step 102 prevents the nail body 1 from rotating in the screw seat 3.
Further, the round head of the nail body 1 is provided with a hexagonal groove 103. When the nail body 1 is implanted into a human body or taken out, the mounting tool matched with the hexagonal groove 103 aligns to the hexagonal groove 103, and the nail body 1 is screwed, so that the screw thread on the nail body 1 can be conveniently screwed in or taken out.
Example 2
Fig. 4 is a schematic view of a stop device according to a second embodiment of the medical screw of the present invention.
As shown in FIG. 4, the present embodiment provides a medical screw capable of rotating at multiple angles, and the present embodiment is different from embodiment 1 only in that the limiting device 2 is different.
In this embodiment, the limiting device 2 is a circular ring type limiting device; namely, the outer side wall of the limiting device 2 is symmetrically provided with sliding grooves for assembling with the inner wall of the screw seat 3, and the sliding grooves are internally provided with first limiting parts 202b to prevent the screw body 1 and the limiting device 2 from being separated from the upper end opening of the screw seat 3.
The present embodiment differs from embodiment 1 only in the form of the stopper 2, and the structures of other components are the same, so that the perspective view, the sectional view, and the exploded view of the present embodiment are not illustrated.
To sum up, the medical screw capable of rotating in multiple angles of the utility model is provided with the limiting device 2 and is installed inside the screw seat 3 by extrusion, so as to prevent the screw body 1 and the limiting device 2 from being separated from the upper end opening of the screw seat 3; a movable gap is reserved between the first limiting part of the limiting device 2 and the second limiting part 304 of the screw seat 3, and when the spinal rod is pressed in, the limiting device 2 can slide to be adjusted to the optimal position.
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 (10)
1. A medical screw capable of rotating at multiple angles, which is characterized by comprising:
the screw comprises a screw seat, a screw body with a spherical head and a limiting device; wherein
The nail body is clamped in the screw seat through the spherical head;
the limiting device is arranged in the screw seat through extrusion so as to prevent the nail body and the limiting device from being separated from the upper end opening of the screw seat.
2. The medical screw of claim 1,
the limiting device is a saddle type limiting device; namely, it is
The limiting device is characterized in that the two sides of the limiting device are saddle bridge parts, sliding grooves for assembling with the inner wall of the screw seat are formed in the outer side wall of the saddle bridge part, and first limiting parts are arranged in the sliding grooves to prevent the screw body and the limiting device from being separated from an upper end opening of the screw seat.
3. The medical screw of claim 1,
the limiting device is a circular ring type limiting device; namely, it is
The outer side wall of the limiting device is symmetrically provided with sliding grooves for assembling with the inner wall of the screw seat, and first limiting parts are arranged in the sliding grooves to prevent the screw body and the limiting device from being separated from an upper end opening of the screw seat.
4. The medical screw according to claim 2 or 3,
the bottom of the limiting device is provided with an inner concave part matched with the spherical head of the nail body.
5. The medical screw of claim 4,
the inner walls of the two sides of the screw seat are respectively symmetrically provided with a second limiting part;
when the limiting device is installed inside the screw seat through extrusion, the second limiting part is clamped in the sliding groove to limit the first limiting part.
6. The medical screw of claim 5,
when the limiting device is arranged inside the screw seat through extrusion, a movable gap is reserved between the first limiting part and the second limiting part.
7. The medical screw of claim 6,
the screw seat is provided with a U-shaped groove suitable for containing spinal rods.
8. The medical screw of claim 7,
the screw seat is provided with a blind hole and a notch which are suitable for being matched with a resetting instrument and are symmetrically arranged;
the blind holes are formed in two sides perpendicular to the opening direction of the U-shaped groove;
the notch is arranged on the groove wall of the U-shaped groove.
9. The medical screw of claim 1,
the lower end part of the nail body is provided with a self-tapping groove;
the self-tapping groove is suitable for reducing the resistance of the pedicle screw in a human body.
10. The medical screw of claim 9,
the upper end of the round head of the nail body is provided with an anti-skid step;
the antiskid steps prevent the screw body from rotating in the screw seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920395904.7U CN209808500U (en) | 2019-03-26 | 2019-03-26 | Medical screw capable of rotating at multiple angles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920395904.7U CN209808500U (en) | 2019-03-26 | 2019-03-26 | Medical screw capable of rotating at multiple angles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209808500U true CN209808500U (en) | 2019-12-20 |
Family
ID=68877244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920395904.7U Active CN209808500U (en) | 2019-03-26 | 2019-03-26 | Medical screw capable of rotating at multiple angles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209808500U (en) |
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2019
- 2019-03-26 CN CN201920395904.7U patent/CN209808500U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 12, Jinfeng Road, West Taihu science and Technology Industrial Park, Changzhou, Jiangsu Province, 213000 Patentee after: CHANGZHOU GEASURE MEDICAL DEVICES Co.,Ltd. Address before: Changzhou jishuo Medical Equipment Co., Ltd., building C1, No.9, Changyang Road, West Taihu science and Technology Industrial Park, Wujin District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU GEASURE MEDICAL DEVICES Co.,Ltd. |