CN216317913U

CN216317913U - Universal vertebral pedicle screw ball socket shallow thread design structure

Info

Publication number: CN216317913U
Application number: CN202122502941.3U
Authority: CN
Inventors: 李德志; 李金玉; 张婧; 仇长东
Original assignee: Nanjing Feidu Medical Instrument Co ltd
Current assignee: Nanjing Feidu Medical Instrument Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-04-19
Anticipated expiration: 2031-10-18

Abstract

The utility model discloses a universal vertebral pedicle screw ball socket shallow thread design structure which comprises a screw base, wherein a ball socket is fixedly arranged in the bottom end of the screw base, a ball head is movably arranged in the ball socket, a screw is fixedly arranged at the bottom of the ball head and movably inserted at the bottom of the screw base, a thread groove is fixedly arranged on the screw base above the ball socket, U-shaped grooves are symmetrically and fixedly arranged on two sides of the top end of the thread groove, a limiting block is rotatably arranged on the bottom end thread of the thread groove, a pressing block is rotatably arranged on the top end thread of the thread groove, clamping mechanisms are fixedly arranged at the top of the limiting block and the bottom of the pressing block, an arc-shaped groove matched with the ball head for use is fixedly arranged at the bottom of the limiting block, and a positioning mechanism is fixedly arranged between the arc-shaped groove and the ball head. This kind of shallow screw thread project organization of universal vertebra root nail ball socket is convenient for press from both sides tight fixedly to the connective bar to the backward extrusion through the connective bar increases the stability of stopper, thereby increases the spacing effect after the screw is rotatory.

Description

Universal vertebral pedicle screw ball socket shallow thread design structure

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a design structure of a ball socket shallow thread of a universal pedicle screw.

Background

The pedicle screw is a commonly used internal fixing device for spinal surgery, generally comprises a universal pedicle screw and an angle-fixed pedicle screw, is fixed on the pedicle of a vertebral arch, and is matched with other internal implants such as a rod, a plug screw and the like to complete the internal fixation of the spinal column. The existing universal pedicle screw is not firm enough for fixing and positioning the screw and the connecting rod, and is easy to loosen due to vibration in the use process, so that the treatment effect is influenced. Therefore, the universal pedicle screw ball socket shallow thread design structure is improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model relates to a universal pedicle screw ball socket shallow thread design structure which comprises a screw base, wherein a ball socket is fixedly arranged in the bottom end of the screw base, a ball head is movably arranged in the ball socket, a screw is fixedly arranged at the bottom of the ball head and movably inserted at the bottom of the screw base, a thread groove is fixedly arranged on the screw base above the ball socket and is communicated with the ball socket, U-shaped grooves are symmetrically and fixedly arranged on two sides of the top end of the thread groove, a limiting block is rotatably arranged on the bottom end thread of the thread groove, a pressing block is rotatably arranged on the top end thread of the thread groove, clamping mechanisms are fixedly arranged at the top of the limiting block and the bottom of the pressing block, an arc-shaped groove matched with the ball head is fixedly arranged at the bottom of the limiting block, and a positioning mechanism is fixedly arranged between the arc-shaped groove and the ball head.

As a preferred technical scheme, the clamping mechanism comprises a plurality of connecting grooves which are fixedly arranged on the top of the limiting block and the bottom of the pressing block in an annular shape, a connecting rod is movably inserted in each connecting groove, an extrusion ring is fixedly arranged at one end, far away from each connecting groove, of each connecting rod, and a first spring is fixedly arranged between the end of each connecting rod and each connecting groove.

As a preferred technical scheme of the present invention, the end of the connecting rod located in the connecting groove is symmetrically and fixedly provided with a fixture block, and the connecting groove is fixedly provided with a clamping groove used in cooperation with the fixture block.

As a preferable technical scheme of the utility model, one side of the extrusion ring, which is far away from the connecting rod, is fixedly provided with a rubber layer.

As a preferred technical scheme, the positioning mechanism comprises a movable cavity fixedly arranged in the bottom end of the limiting block, fixed rods are symmetrically and fixedly arranged at two ends in the movable cavity, connecting blocks are movably sleeved on the fixed rods, a second spring is movably sleeved on the fixed rods above the connecting blocks, a positioning rod is fixedly arranged between the two connecting blocks and movably inserted on the limiting block, and a positioning hole matched with the positioning rod is fixedly arranged at the top of the ball head.

As a preferable technical scheme of the utility model, sleeve grooves are fixedly arranged at the tops of the limiting blocks and the pressing block.

The utility model has the beneficial effects that:

1. according to the universal pedicle screw ball socket shallow thread design structure, the connecting rod penetrating through the U-shaped groove can be squeezed and clamped through the clamping mechanism, the fixing stability of the connecting rod is improved, the limiting block can be limited through the backward extrusion of the connecting rod, the phenomenon that the ball head rotates due to looseness caused by vibration of the limiting block is avoided, and the positioning effect after the screw rotates is improved;

2. this kind of shallow screw thread design structure of universal vertebra root nail ball socket can make the screw keep vertical state through positioning mechanism to make the screw switch the use between universal vertebra root nail and fixed vertebra root nail.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of a main body of a universal pedicle screw ball socket shallow thread design structure;

FIG. 2 is a schematic structural diagram of a limiting block of the universal pedicle screw ball socket shallow thread design structure of the utility model;

FIG. 3 is a schematic cross-sectional view of a screw base of the universal pedicle screw ball and socket shallow thread design of the present invention;

FIG. 4 is an enlarged schematic view of the design of the shallow thread of the ball socket of the universal pedicle screw of the utility model at the position A in FIG. 3;

FIG. 5 is an enlarged structural view at B in FIG. 3 of the design structure of the shallow thread of the ball socket of the universal pedicle screw of the utility model.

In the figure: 1. a screw seat; 2. a ball socket; 3. a ball head; 4. a screw; 5. a thread groove; 6. a U-shaped groove; 7. a limiting block; 71. a sleeve groove; 8. a compression block; 9. a clamping mechanism; 91. connecting grooves; 92. a connecting rod; 921. a clamping block; 922. a card slot; 93. an extrusion ring; 94. a first spring; 10. an arc-shaped slot; 11. a positioning mechanism; 111. a movable cavity; 112. fixing the rod; 113. connecting blocks; 114. a second spring; 115. positioning a rod; 116. and (7) positioning the holes.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example (b): as shown in figures 1-5, the utility model relates to a universal pedicle screw ball socket shallow thread design structure, which comprises a screw base 1, wherein a ball socket 2 is fixedly arranged at the bottom end of the screw base 1, a ball head 3 is movably arranged in the ball socket 2, a screw 4 is fixedly arranged at the bottom of the ball head 3, the screw 4 is movably inserted at the bottom of the screw base 1, a thread groove 5 is fixedly arranged on the screw base 1 above the ball socket 2, the thread groove 5 is communicated with the ball socket 2, U-shaped grooves 6 are symmetrically and fixedly arranged at two sides of the top end of the thread groove 5, a limiting block 7 is rotatably arranged at the bottom end of the thread groove 5, a pressing block 8 is rotatably arranged at the top end of the thread groove 5, clamping mechanisms 9 are fixedly arranged at the top of the limiting block 7 and the bottom of the pressing block 8, an arc-shaped groove 10 matched with the ball head 3 for use is fixedly arranged at the bottom of the limiting block 7, and a positioning mechanism 11 is fixedly arranged between the arc-shaped groove 10 and the ball head 3, thereby bulb 3 drives screw 4 at ball 2 internal rotations of ball socket and carries out three-dimensional rotatory, stopper 7 rotates downstream through the screw and makes arc wall 10 carry on spacingly to bulb 3, thereby it fixes to make screw 4 rotate the back, can extrude the connective bar that passes from U type groove 6 through clamping mechanism 9 and press from both sides tightly, increase the fixed stability of connective bar, and backward extrusion through the connective bar can carry on spacingly to stopper 7, thereby avoid stopper 7 to receive vibrations to produce not hard up bulb 3 rotation that leads to, can make screw 4 keep the vertical state through positioning mechanism 11, thereby make screw 4 switch the use between universal vertebra root nail and fixed vertebra root nail.

Wherein, clamping mechanism 9 is including being cyclic annular fixed a plurality of spread grooves 91 of establishing on stopper 7 top and compact heap 8 bottom, the activity is inserted in spread groove 91 and is equipped with connecting rod 92, connecting rod 92 is kept away from the fixed extrusion ring 93 that is equipped with of one end of spread groove 91, the fixed spring 94 that is equipped with between the tip of connecting rod 92 and the spread groove 91, the resilience force through spring 94 makes extrusion ring 93 press from both sides the connecting rod that passes from between stopper 7 and the compact heap 8 and press from both sides fixedly, and through the extrusion of connecting rod to spring 94 in the stopper 7, thereby make spring 94 carry on spacingly to stopper 7, thereby avoid stopper 7 to receive vibrations to produce not hard up and lead to bulb 3 to rotate.

Wherein, the one end symmetry that connecting rod 92 is located connecting groove 91 is fixed and is equipped with fixture block 921, fixed being equipped with on connecting groove 91 with the draw-in groove 922 of fixture block 921 cooperation use, remove in draw-in groove 922 through fixture block 921 to avoid connecting rod 92 to break away from in connecting groove 91.

Wherein, the side of the extrusion ring 93 far away from the connecting rod 92 is fixedly provided with a rubber layer, and the friction force of the extrusion ring 93 can be increased through the rubber layer.

Wherein, positioning mechanism 11 is including fixed movable chamber 111 of establishing in stopper 7 bottom, the both ends symmetry in the activity chamber 111 is fixed and is equipped with dead lever 112, movable sleeve is equipped with connecting block 113 on the dead lever 112, movable sleeve is equipped with No. two springs 114 on the dead lever 112 of connecting block 113 top, fixed locating lever 115 that is equipped with between two connecting blocks 113, and locating lever 115 activity is inserted and is established on stopper 7, the fixed locating hole 116 that uses with locating lever 115 that is equipped with in the top of bulb 3, when locating hole 116 removed the position of locating lever 115, resilience force through No. two springs 114 makes locating lever 115 insert into locating hole 116, thereby fix a position bulb 3, make screw 4 keep the vertical state.

Wherein, the top of stopper 7 and the top of compact heap 8 are all fixed and are equipped with sleeve groove 71, are convenient for rotate stopper 7's top and compact heap 8 through box spanner through sleeve groove 71.

The working principle is as follows: in the design structure of the universal vertebral pedicle screw ball socket shallow thread, the ball head 3 rotates in the ball socket 2 to drive the screw 4 to rotate in three dimensions, the limiting block 7 moves downwards through the rotation of the thread to enable the arc-shaped groove 10 to limit the ball head 3, so that the screw 4 is fixed after rotating, the extrusion ring 93 clamps and fixes the connecting rod passing through between the limiting block 7 and the pressing block 8 through the resilience force of the first spring 94, and the first spring 94 in the limiting block 7 is extruded through the connecting rod, thereby limiting the limiting block 7 by the first spring 94, avoiding the limiting block 7 from being loosened by vibration to cause the rotation of the ball head 3, when the positioning hole 116 is moved to the position of the detent lever 115, the detent lever 115 is inserted into the positioning hole 116 by the resilient force of the second spring 114, thereby fix a position bulb 3, make screw 4 keep the vertical state to make screw 4 switch between universal vertebra root nail and fixed vertebra root nail and use. The shallow thread design structure of the universal pedicle screw ball socket is simple and reasonable in structure, novel in design, high in practical value and worthy of wide popularization.

Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shallow thread design structure of a universal pedicle screw ball socket comprises a screw base (1) and is characterized in that a ball socket (2) is fixedly arranged at the bottom end of the screw base (1), a ball head (3) is movably arranged in the ball socket (2), a screw (4) is fixedly arranged at the bottom of the ball head (3), the screw (4) is movably inserted at the bottom of the screw base (1), a thread groove (5) is fixedly arranged on the screw base (1) above the ball socket (2), the thread groove (5) is communicated with the ball socket (2), U-shaped grooves (6) are symmetrically and fixedly arranged at two sides of the top end of the thread groove (5), a limiting block (7) is rotatably arranged at the bottom end thread of the thread groove (5), a pressing block (8) is rotatably arranged at the top end thread of the thread groove (5), and clamping mechanisms (9) are fixedly arranged at the top of the limiting block (7) and the bottom of the pressing block (8), the bottom of the limiting block (7) is fixedly provided with an arc-shaped groove (10) matched with the ball head (3) for use, and a positioning mechanism (11) is fixedly arranged between the arc-shaped groove (10) and the ball head (3).

2. The ball socket shallow thread design structure of the universal pedicle screw according to claim 1, wherein the clamping mechanism (9) comprises a plurality of connecting grooves (91) which are fixedly arranged on the top of the limiting block (7) and the bottom of the compression block (8) in an annular shape, a connecting rod (92) is movably inserted in each connecting groove (91), an extrusion ring (93) is fixedly arranged at one end, far away from the connecting grooves (91), of each connecting rod (92), and a first spring (94) is fixedly arranged between the end of each connecting rod (92) and each connecting groove (91).

3. The ball socket shallow thread design structure of the universal pedicle screw according to claim 2, wherein the connecting rod (92) is symmetrically and fixedly provided with a clamping block (921) at one end located in the connecting groove (91), and the connecting groove (91) is fixedly provided with a clamping groove (922) matched with the clamping block (921).

4. The ball socket shallow thread design structure of the universal pedicle screw as claimed in claim 2, wherein a rubber layer is fixedly arranged on one side of the extrusion ring (93) far away from the connecting rod (92).

5. The ball socket shallow thread design structure of the universal pedicle screw according to claim 1, wherein the positioning mechanism (11) comprises a movable cavity (111) fixedly arranged in the bottom end of the limiting block (7), fixing rods (112) are symmetrically and fixedly arranged at two ends in the movable cavity (111), a connecting block (113) is movably sleeved on each fixing rod (112), a second spring (114) is movably sleeved on each fixing rod (112) above each connecting block (113), a positioning rod (115) is fixedly arranged between the two connecting blocks (113), the positioning rod (115) is movably inserted into the limiting block (7), and a positioning hole (116) matched with the positioning rod (115) is fixedly arranged at the top of the ball head (3).

6. The ball socket shallow thread design structure of the universal pedicle screw according to claim 1, wherein sleeve grooves (71) are fixedly arranged at the tops of the limiting blocks (7) and the pressing blocks (8).