CN210384016U - Flip-chip formula pedicle of vertebral arch screw - Google Patents
Flip-chip formula pedicle of vertebral arch screw Download PDFInfo
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- CN210384016U CN210384016U CN201920670814.4U CN201920670814U CN210384016U CN 210384016 U CN210384016 U CN 210384016U CN 201920670814 U CN201920670814 U CN 201920670814U CN 210384016 U CN210384016 U CN 210384016U
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Abstract
The utility model discloses a flip-chip pedicle screw, which comprises a screw sleeve, a pressing block, a screw rod provided with a screw rod head and a gasket which can deform between a locking state and a releasing state of outward expansion to release locking; this nail cover is equipped with the mounting groove, and this mounting groove has from top to bottom in proper order to arrange let position section, lock joint section and flange section. It can realize the flip-chip, and the gasket is from stepping down the section activity to the lock and connect the section time by the state change of loosing to the lock and connect the state, and the nail rod head is located the mounting groove and presss from both sides and establish between gasket and the briquetting that is in the lock and connects the state, and the gasket props to lean on flange portion, can guarantee that briquetting, gasket, nail cover and nail rod are in firm connected state, makes big specification size pedicle of vertebral arch screw can normally assemble, can let assembly cost reduce.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a flip-chip formula pedicle of vertebral arch screw.
Background
The pedicle screw comprises a screw seat, a screw rod and a pressing block. This nail seat is equipped with the nail cover, and this nail cover is equipped with the mounting groove that runs through from top to bottom, and this mounting groove is connected to this nail pole, and this nail cover top surface is concave to be equipped with and runs through the groove, and it is perpendicular with this mounting groove running through direction that should run through the groove, and this briquetting is established in the nail cover. According to the requirement, a locking seat is further arranged and is connected to the upper part of the through groove through threads, wherein the locking seat, the pressing block and the locking seat are matched to form a mounting structure capable of mounting the rod body (the implant shaft). The existing pedicle screws with large specification sizes, such as long universal pedicle screws or universal pedicle screws, cannot be normally assembled downwards from a screw sleeve due to the fact that the diameter of a screw rod is large.
SUMMERY OF THE UTILITY MODEL
The utility model provides a flip-chip pedicle screw, which overcomes the defects of the pedicle screw in the background technology.
The utility model provides an adopted technical scheme of its technical problem is:
a flip-chip pedicle screw comprises a screw sleeve, a pressing block, a screw rod provided with a screw rod head and a gasket which can deform between a locking state and a releasing state of outward expansion for releasing locking; the nail sleeve is provided with an installation groove, the installation groove is provided with a yielding section, a locking section and a flange section which are arranged up and down in sequence, and an inward convex flange part is formed at the flange section; the pressing block is arranged in the mounting groove; the gasket is arranged in the mounting groove, and the gasket is changed from a release state to a locking state when moving from the abdicating section to the locking section; the nail rod head is positioned in the mounting groove and clamped between the gasket in a locking connection state and the pressing block, and the gasket is propped against the flange part.
In one embodiment: the shim includes a C-shaped member.
In one embodiment: the inner side wall of the gasket is a conical wall with a large upper part and a small lower part.
In one embodiment: the gasket tightly holds the head of the nail rod when in a locked state.
In one embodiment: the inner diameter of the abdicating section is larger than that of the locking section, and the inner diameter of the locking section is larger than that of the flange section.
In one embodiment: a guide wall is formed between the receding section and the locking section, and the guide wall is arranged to be gradually reduced from top to bottom.
In one embodiment: the nail head is provided with an upper peripheral wall and a lower peripheral wall, the upper peripheral wall is gradually enlarged from top to bottom, and the lower peripheral wall is gradually enlarged from bottom to top; the lower peripheral wall of the nail rod head is supported against the inner side wall of the gasket, and the pressing block is propped against the upper peripheral wall of the nail rod head.
In one embodiment: the maximum outer diameter of the nail rod head is matched with the inner diameter of the flange section of the mounting groove.
In one embodiment: the mounting groove is also provided with an attachment section positioned above the abdicating section, and the abdicating block is at least partially attached to the attachment section; the inner diameter of the connecting section is smaller than that of the locking section, and the inner diameter of the locking section is smaller than that of the abdicating section.
In one embodiment: the attachment section inner diameter is equal to the flange section inner diameter.
Compared with the background technology, the technical scheme has the following advantages:
can realize the flip-chip, the gasket is from stepping down the section activity to the lock and connect the section time by the state change of loosing to the lock and connect the state, and the nail rod head is located the mounting groove and presss from both sides and establish between gasket and the briquetting that is in the lock and connects the state, and the gasket props to lean on flange portion, can guarantee that briquetting, gasket, nail cover and nail rod are in firm connected state, makes big specification size pedicle of vertebral arch screw can normally assemble, can let assembly cost reduce.
The gasket includes C shape piece, and convenient assembly, the lock joint is firm reliable.
The inner side wall of the gasket is a conical wall with a large upper part and a small lower part, so that the holding fit degree is improved, the connection strength is improved, and the service life is prolonged.
The gasket tightly embraces the nail rod head when in a locking connection state, can avoid inward movable deformation of the gasket, and improves the assembly connection firmness.
A guide wall which is gradually reduced from top to bottom is formed between the concession section and the locking section, and the gasket can be driven to automatically change from a release state to a locking state when moving from the concession section to the locking section.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
FIG. 1 is a front view schematic illustration of a particular embodiment pedicle screw.
FIG. 2 is a left side schematic view of a particular embodiment pedicle screw.
FIG. 3 is a cross-sectional schematic view of an embodiment pedicle screw.
FIG. 4 is a cross-sectional exploded view of a particular embodiment pedicle screw.
FIG. 5 is a cross-sectional view of the screw housing and the compression block of the pedicle screw of the preferred embodiment shown assembled together.
FIG. 6 is an exploded isometric view of a particular embodiment pedicle screw.
Detailed Description
Referring to fig. 1 to 6, a flip-chip pedicle screw includes a screw housing 1, a pressing block 2, a screw rod 3 having a screw rod head 31, and a shim 4 deformable between a locked state and a released state expanded to release the locking, wherein the shim 5 is deformed, for example, elastically.
The nail sleeve 1 is provided with a mounting groove 11, the mounting groove 11 is provided with an attachment section 111, a yielding section 112, a locking section 113 and a flange section 114 which are sequentially arranged from top to bottom, the inner diameter of the attachment section 111 is smaller than the inner diameter of the locking section 113, the inner diameter of the locking section 113 is smaller than the inner diameter of the yielding section 112, and the inner diameter of the attachment section 111 is equal to the inner diameter of the flange section 114; the abdicating section 112 has a concave portion 115 relative to the mounting section or the locking section, the concave portion provides abdicating space for the gasket 4 to change from the self-locking state to the releasing state; the flange section 114 has an inner diameter smaller than the inner diameter of the locking section 113, so that the flange section 114 is formed with an inwardly projecting flange portion 116. A guiding wall 117 is formed between the receding section 112 and the locking section 113, and the guiding wall 117 is a tapered wall.
The pressing block 2 is hollow and the hollow forms a hollow groove 21, and the outer diameter of the pressing block 2 is matched with the inner diameter of the connecting section 111.
The nail head 31 has an upper peripheral wall 311 and a lower peripheral wall 312, the upper peripheral wall 311 is disposed gradually larger from the top to the bottom, the lower peripheral wall 312 is disposed gradually larger from the bottom to the top, and the nail head 31 has a ball head structure. The maximum outer diameter of the nail head 31 is matched with the inner diameter of the flange section 114 of the mounting groove 11.
The spacer 4 comprises a C-shaped member, such as an arc-shaped member having a central angle greater than 180 degrees, or greater than 270 degrees. The inner wall 41 of the spacer 4 is tapered in a large upper portion and a small lower portion.
The flip-chip process is as follows: firstly, the pressing block 2 is arranged in the mounting section 111 of the mounting groove 11 from bottom to top; extruding the gasket 4 to make the gasket 4 elastically deform and be arranged in the abdicating section 112 of the mounting groove 11 from bottom to top, and resetting the gasket 4 to be in a release state as shown in fig. 4; the nail rod head 31 is arranged in the mounting groove 11 from top to bottom and is also arranged in the gasket 4 through elastic deformation; the lower screw rod 3 drives the gasket 4 to move from the abdicating section 112 to the locking section 113, at this time, the gasket 4 changes from the release state to the locking state and is supported against the flange part 116, the gasket 4 tightly embraces the lower peripheral wall 312 of the screw rod head 31 when in the locking state, and the lower peripheral wall 312 of the screw rod head 31 is supported against the inner side wall 41 of the gasket 4; the pressing block 3 is pressed down from the top to the bottom, so that the pressing block 3 is pressed against the upper peripheral wall 311 of the nail head 31, and the nail head 31 is clamped between the gasket 4 and the pressing block 3 in the locked state, as shown in fig. 3. Wherein, the gasket 4 tightly embraces the lower peripheral wall 312 of the nail rod head 31 and is positioned in the locking section 113 in the locking state, thereby being capable of limiting the deformation of the gasket 4 and ensuring that the pressing block, the gasket, the nail sleeve and the nail rod are in a firm connection state.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (10)
1. The utility model provides a flip-chip formula pedicle of vertebral arch screw which characterized in that: comprises a nail sleeve, a pressing block, a nail rod provided with a nail rod head and a gasket which can deform between a locking state and a releasing state of outward expansion for releasing locking; the nail sleeve is provided with an installation groove, the installation groove is provided with a yielding section, a locking section and a flange section which are arranged up and down in sequence, and an inward convex flange part is formed at the flange section; the pressing block is arranged in the mounting groove; the gasket is arranged in the mounting groove, and the gasket is changed from a release state to a locking state when moving from the abdicating section to the locking section; the nail rod head is positioned in the mounting groove and clamped between the gasket in a locking connection state and the pressing block, and the gasket is propped against the flange part.
2. The inverted pedicle screw as claimed in claim 1, wherein: the shim includes a C-shaped member.
3. The inverted pedicle screw as claimed in claim 1, wherein: the inner side wall of the gasket is a conical wall with a large upper part and a small lower part.
4. The inverted pedicle screw as claimed in claim 1, wherein: the gasket tightly holds the head of the nail rod when in a locked state.
5. The inverted pedicle screw as claimed in claim 1, wherein: the inner diameter of the abdicating section is larger than that of the locking section, and the inner diameter of the locking section is larger than that of the flange section.
6. The inverted pedicle screw as claimed in claim 1, wherein: a guide wall is formed between the receding section and the locking section, and the guide wall is arranged to be gradually reduced from top to bottom.
7. The inverted pedicle screw as claimed in claim 1, wherein: the nail head is provided with an upper peripheral wall and a lower peripheral wall, the upper peripheral wall is gradually enlarged from top to bottom, and the lower peripheral wall is gradually enlarged from bottom to top; the lower peripheral wall of the nail rod head is supported against the inner side wall of the gasket, and the pressing block is propped against the upper peripheral wall of the nail rod head.
8. The inverted pedicle screw as claimed in claim 1, wherein: the maximum outer diameter of the nail rod head is matched with the inner diameter of the flange section of the mounting groove.
9. The inverted pedicle screw as claimed in claim 1, wherein: the mounting groove is also provided with an attachment section positioned above the abdicating section, and the abdicating block is at least partially attached to the attachment section; the inner diameter of the connecting section is smaller than that of the locking section, and the inner diameter of the locking section is smaller than that of the abdicating section.
10. The inverted pedicle screw as claimed in claim 9, wherein: the attachment section inner diameter is equal to the flange section inner diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920670814.4U CN210384016U (en) | 2019-05-10 | 2019-05-10 | Flip-chip formula pedicle of vertebral arch screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920670814.4U CN210384016U (en) | 2019-05-10 | 2019-05-10 | Flip-chip formula pedicle of vertebral arch screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210384016U true CN210384016U (en) | 2020-04-24 |
Family
ID=70344666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920670814.4U Active CN210384016U (en) | 2019-05-10 | 2019-05-10 | Flip-chip formula pedicle of vertebral arch screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210384016U (en) |
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2019
- 2019-05-10 CN CN201920670814.4U patent/CN210384016U/en active Active
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