CN217488799U - Connecting rod locking device and external fixing support - Google Patents

Abstract

The utility model provides a connecting rod locking device and external fixation support, this connecting rod locking device include base, bulb screw rod to and the last clamp splice and the lower clamp splice of mutually supporting. The upper clamping block and the lower clamping block are used for clamping a connecting rod, the base is provided with a first connecting portion and a second connecting portion, the first connecting portion is used for being connected with the bone screw locking device, the second connecting portion is used for being connected with the lower clamping block in a spherical hinge mode, and the ball head screw rod sequentially penetrates through the second connecting portion, the lower clamping block and the upper clamping block and is connected with the tightening nut. The utility model provides a connecting rod locking device can provide installation angle for the connecting rod better, is favorable to reducing the operation degree of difficulty.

Description

Connecting rod locking device and external fixing support

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a connecting rod locking device and external fixation support.

Background

The external fixation support has been applied for over 100 years, is mainly applied to temporary fracture fixation after emergencies such as trauma, war injury, earthquake and the like, and is used in limb orthopedics, bone defect, limb extension, bone infection and the like. The prior external fixing bracket has the following problems: is limited by the driving position of the bone screw, cannot provide a good installation angle for the connecting rod, and causes difficulty in operation implementation. Therefore, how to improve the external fixing bracket to better provide the installation angle for the connecting rod becomes a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a connecting rod locking device and external fixation support, this connecting rod locking device can provide installation angle for the connecting rod better, is favorable to reducing the operation degree of difficulty.

In order to achieve the above object, the utility model provides a following technical scheme:

a connecting rod locking device comprising:

the upper clamping block and the lower clamping block are matched with each other and used for clamping the connecting rod;

the base is provided with a first connecting part used for being connected with the bone screw locking device and a second connecting part used for being connected with the lower clamping block, and the second connecting part is in spherical hinge connection with the lower clamping block;

and the ball head screw rod sequentially penetrates through the second connecting part, the lower clamping block and the upper clamping block and is connected with the tightening nut.

Optionally, in the above link locking device, the ball-end screw is provided with a limiting protrusion protruding in the radial direction, and the lower clamping block is provided with a limiting clamping groove matched with the limiting protrusion.

Optionally, in the above link locking device, a first elastic member is provided in the second connecting portion, and the first elastic member abuts against a ball end of the ball-end screw.

Optionally, in the above link locking device, the upper clamping block and the lower clamping block are slidably connected, and the relative sliding direction is perpendicular to the axis of the ball screw, and a second elastic member for automatically resetting the upper clamping block is disposed between the upper clamping block and the lower clamping block.

Optionally, in the above link locking device, a side surface of the upper clamping block is provided with an operating portion that facilitates pushing and pulling of the upper clamping block by hand, and the operating portion is provided to protrude with respect to the side surface of the upper clamping block.

An external fixation brace comprising a bone screw locking device and a linkage locking device, the linkage locking device being any of the linkage locking devices disclosed above.

Optionally, in the above external fixation bracket, a single-skin self-tapping screw fixed by the bone screw locking device is included.

Optionally, in the external fixation bracket, a position of the external surface of the single-skin self-tapping screw, which is a preset distance away from the self-tapping tip, is provided with a limit indicating line.

Optionally, in the above external fixation bracket, the bone screw locking device includes:

the L-shaped connecting arm, one end of which is detachably and fixedly connected with the first connecting part;

the pressing piece is arranged on the outer side of the connecting arm;

the tightening bolt penetrates through the pressing piece and is in threaded connection with the connecting arm;

a spherical tightening member located between the compression member and the connecting arm, the tightening member being provided with a central passage through which the bone screw passes, the tightening member being forcibly elastically deformable to tighten the bone screw.

Optionally, in the above external fixing bracket, an outer surface of the binding member is provided with ribs for increasing friction.

According to the technical scheme, the utility model provides an among the connecting rod locking device, the first connecting portion of base are used for being connected with bone screw locking device, the second connecting portion are used for being connected with lower clamp splice, the bulb screw rod passes the second connecting portion in proper order, lower clamp splice and last clamp splice and with adjust tight nut and be connected, it is used for pressing from both sides tight connecting rod with lower clamp splice to go up the clamp splice, be connected for the ball pivot between second connecting portion and the lower clamp splice, consequently after having beaten the bone screw, can provide the installation angle that wants for the connecting rod through rotatory clamp splice in a flexible way down, it is more convenient to implement in the operation like this, the operation degree of difficulty is lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of an external fixing bracket provided by an embodiment of the present invention;

fig. 2 is a schematic view of a usage state of an external fixation bracket provided by an embodiment of the present invention;

fig. 3 is a schematic view of a locking device of an external fixation bracket provided by an embodiment of the present invention;

FIG. 4 is a schematic view of another angle of the locking device shown in FIG. 3;

FIG. 5 is a schematic view of the bone screw locking device 2 of FIG. 3 in use;

FIG. 6 is a schematic view of the connecting arm 21 of FIG. 5;

FIG. 7 is a schematic view of the compression member 22 of FIG. 5;

FIG. 8 is a schematic view of the clasp 24 of FIG. 5;

FIG. 9 is a schematic view of the bone screw 5 of FIG. 5;

fig. 10 is a schematic view of a link lock device provided by an embodiment of the present invention;

FIG. 11 is a schematic view of another angle of the link lock device shown in FIG. 10;

FIG. 12 is a schematic view of the base 1 of FIG. 11;

FIG. 13 is a schematic view of the lower clamp block 31 of FIG. 11;

FIG. 14 is a schematic view of the upper clamp block 32 of FIG. 11;

FIG. 15 is a schematic view of the upper clamp block 32 of FIG. 14 from another perspective;

fig. 16 is a schematic view of the tightening unit 33 in fig. 11.

Labeled as:

1. a base; 11. a first connection portion; 12. a second connecting portion; 2. a bone screw locking device; 3. a clamp block assembly; 4. a connecting rod; 5. a bone screw; 51. a limiting indicating line; 6. a set screw; 7. a second elastic member;

21. a connecting arm; 211. a first ball socket; 22. a compression member; 221. a second ball socket; 23. tightening the bolt; 24. a cinch;

31. a lower clamping block; 311. a first sliding fit portion; 312. a clamping portion; 313. a screw hole; 314. a limiting clamping groove;

32. an upper clamping block; 321. a second sliding fit portion; 322. a long round hole; 323. an operation section;

33. a tightening device; 331. a ball head screw; 3311. a limiting bulge; 332. tightening the nut; 333. a first elastic member; 334. a cock.

Detailed Description

For the sake of understanding, the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 and 2, an embodiment of the present invention provides an external fixation support, which mainly includes a connecting rod 4, a bone screw 5 and a locking device, wherein the locking device has a structure as shown in fig. 3 and 4, the locking device includes the bone screw locking device 2 and a connecting rod locking device, the bone screw 5 is installed on the screw locking device 2, and the connecting rod 4 is installed on the connecting rod locking device.

Referring to fig. 10 to 16, the embodiment of the present invention provides a connecting rod locking device, which mainly includes a base 1 and a clamping block assembly 3, wherein the clamping block assembly 3 includes an upper clamping block 32 and a lower clamping block 31 that are matched with each other, the upper clamping block 32 and the lower clamping block 31 are used for clamping a connecting rod 4, and the clamping degree is adjusted by a tightening device 33. The base 1 is provided with a first connecting part 11 for connecting with the bone screw locking device 2 and a second connecting part 12 for connecting with the lower clamping block 31, the second connecting part 12 is connected with the lower clamping block 31 in a spherical hinge mode, the tightening device 33 comprises a ball head screw 331 and a nut 332, and the ball head screw 331 sequentially penetrates through the second connecting part 12, the lower clamping block 31 and the upper clamping block 32 and is connected with the tightening nut 332. Because second connecting portion 12 is connected with clamp splice 31 ball pivot down, so after having beaten bone screw 5, can look for suitable angle through rotatory clamp splice 31 down earlier, then install on clamp splice subassembly 3 connecting rod 4 again, it is thus visible, the utility model provides a connecting rod locking device can provide installation angle for connecting rod 4 better, and it is more convenient to carry out the operation like this, and the operation degree of difficulty is lower.

Referring to fig. 3, 4, 10 to 12, the first connecting portion 11 of the base 1 may be formed with a herringbone top surface, i.e., two slope surfaces are symmetrically formed, and the bone screw locking device 2 is detachably and fixedly mounted on the slope surfaces by the fixing screws 6. For ease of assembly, a pre-nut is typically provided in the first connection portion 11 to engage the set screw 6. The second connecting portion 12 may be located at one end of the first connecting portion 11 and located between the two slope surfaces, and in order to achieve a spherical hinge connection with the lower clamping block 31, the top of the second connecting portion 12 may be formed with a spherical surface, and then the lower clamping block 31 may be correspondingly provided with a ball socket matched with the spherical surface. The symmetry plane of the two slope surfaces (i.e. the longitudinal section of the first connecting portion 11) passes along the center line of the second connecting portion 12, the clamping block assembly 3 on the second connecting portion 12 and the two bone screw locking devices 2 on the first connecting portion 11 are distributed in a delta shape, and the included angle between the two slope surfaces is generally 110 to 130 degrees, for example, 120 degrees.

Referring to fig. 13 and 16, in the present embodiment, the ball-end screw 331 is provided with a limiting protrusion 3311 protruding in the radial direction, and the lower clamping block 31 is provided with a limiting slot 314 engaged with the limiting protrusion 3311. When the ball-end screw 331 is assembled on the clamping block component 3, the ball-end screw 331 passes through the screw hole 313 of the lower clamping block 31, and the limit protrusion 3311 on the ball-end screw 331 is clamped into the limit clamping groove 314 beside the screw hole 313, so that the relative rotation of the ball-end screw 331 and the clamping block component 3 is limited, and the clamping degree of the lower clamping block 31 and the upper clamping block 32 can be adjusted only by operating the tightening nut 332. In addition, the ball screw 331 can be designed in other configurations, for example, a hexagon socket is disposed at the threaded end of the ball screw 331, and when the clamping degree of the clamping block assembly 3 needs to be adjusted, a hexagon socket wrench is first inserted into the hexagon socket to fix the ball screw 331, and then the tightening nut 332 is operated to tighten or loosen the ball screw 331.

As shown in fig. 16, the tightening unit 33 may further include a first elastic member 333, the first elastic member 333 may be disposed in the second connection portion 12, the installation opening may be closed by a plug 334 after the first elastic member 333 is installed in the second connection portion 12, one end of the first elastic member 333 may abut against the plug 334, and the other end may abut against a ball end of the ball screw 331. The first elastic member 333 may be a component capable of providing an elastic force, such as a compression spring, and the ball end of the ball screw 331 is more tightly fitted to the second connecting portion 12 of the base 1 by the acting force applied to the ball screw 331 by the first elastic member 333, and a gap between the ball end and the second connecting portion is eliminated, so that accurate positioning can be more quickly obtained when the clamping block assembly 3 is rotated to a desired position, that is, the control precision when the clamping block assembly 3 is rotated is higher.

Referring to fig. 11, 13-15, in this embodiment, the upper clamping block 32 and the lower clamping block 31 are slidably connected, and the relative sliding direction is perpendicular to the axis of the ball screw 331, and a second elastic member 7 for automatically returning the upper clamping block 32 is disposed between the upper clamping block 32 and the lower clamping block 31. The lower clamping block 31 is provided with first sliding fit portions 311 on both sides, the upper clamping block 32 is provided with second sliding fit portions 321 on both sides, and the first sliding fit portions 311 and the second sliding fit portions 321 are assembled into a similar tenon structure, for example, the first sliding fit portions 311 are sliding grooves, and the second sliding fit portions 321 are sliding rails embedded in the sliding grooves. The ball head screw 331 penetrates through the long circular hole 322 of the upper clamping block 32, the length direction of the long circular hole 322 is consistent with the sliding direction of the upper clamping block 32 relative to the lower clamping block 31, and the upper clamping block 32 can be moved in the direction far away from the clamping part 312 by sliding, so that the clamping part of the upper clamping block 32 and the clamping part 312 of the lower clamping block 31 are staggered by a certain space, and convenience is provided for placing the connecting rod 4. The second elastic member 7 may be a component capable of providing an elastic force, such as a compression spring, and when the upper clamping block 32 is released after the connecting rod 4 is placed in the connecting rod, the upper clamping block 32 automatically returns under the elastic force of the second elastic member 7, that is, the clamping portion of the upper clamping block 32 returns to a position opposite to the clamping portion 312 of the lower clamping block 31 to clamp the connecting rod 4. In order to facilitate the operation of the upper clamping block 32, the present embodiment provides the side surface of the upper clamping block 32 with an operation portion 323 for facilitating the pushing and pulling of the upper clamping block 32 by hand, and the operation portion 323 is convexly disposed relative to the side surface of the upper clamping block 32. Specifically, the operating portion 323 may be designed as a slope surface.

Referring to fig. 4 to 9, in the present embodiment, the bone screw locking device 2 includes an L-shaped connecting arm 21, a pressing member 22, a tightening bolt 23 and a spherical tightening member 24, wherein one end of the connecting arm 21 is detachably and fixedly connected with the first connecting portion 11, so that the form of the locking device can be changed by adjusting the connecting arm 21, that is, fig. 4 is only one of the use forms of the locking device exemplarily shown, in fig. 4, two bone screw locking devices 2 are M-shaped with the base 1, that is, two bone screw locking devices 2 are both arranged by the first connecting portion 11 toward the second connecting portion 12, and furthermore, by arranging both bone screw locking devices 2 by the first connecting portion 11 in a direction away from the second connecting portion 12, it is possible to make both bone screw locking devices 2Y-shaped with the base 1, or, by arranging both bone screw locking devices 2 by the first connecting portion 11 in opposite directions, it is possible to make both bone screw locking devices 2S-shaped.

The pressing piece 22 is arranged on the outer side of the connecting arm 21, the tightening piece 24 is located between the pressing piece 22 and the connecting arm 21, the tightening bolt 23 penetrates through the pressing piece 22 and is in threaded connection with the connecting arm 21, and the size of a gap between the pressing piece 22 and the connecting arm 21 can be changed by rotating the tightening bolt 23, so that the clamping degree of the tightening piece 24 can be adjusted. The tightening member 24 is provided with a central passage through which the bone screw 5 passes, and the tightening member 24 is forced to be elastically deformed so as to tighten the bone screw 5. The connecting arm 21 is provided with a first ball socket 211, the pressing member 22 is provided with a second ball socket 221, and the tightening member 24 is mounted in a ball cavity formed by the first ball socket 211 and the second ball socket 221, as shown in fig. 8, the tightening member 24 may be specifically a sphere provided with a plurality of cutouts alternately communicating with both ends. In the embodiment, the outer surface of the tightening member 24 is provided with ribs for increasing friction, so that the tightening member 24 is not easy to shake after being clamped by the pressing member 22 and the connecting arm 21. As shown in fig. 7, the pressing element 22 may be designed in a bow-shaped manner.

As shown in fig. 9, the bone screw 5 fixed by the bone screw locking device 2 is preferably a self-tapping screw of a single cortical type, which can reduce the occurrence of infection of the medullary cavity. The head end of the bone screw 5 is provided with a self-tapping tip through a single-side arc-shaped groove, in the embodiment, a position, which is a preset distance away from the self-tapping tip, of the outer surface of the bone screw 5 is provided with a limit indicating line 51, the limit indicating line 51 can be a marking line, such as a ring groove, which can be identified by naked eyes, and the entering depth of the bone screw 5 can be conveniently known through the limit indicating line 51, so that the placing depth of the bone screw 5 is not required to be observed through an imaging instrument in the resetting-temporary fixing stage, and the radioactive ray exposure is reduced. Specifically, the threaded section of the bone screw 5 may have a length of 15mm, and the limit indication line 51 may be provided at a position 5mm from this threaded section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A connecting rod locking device, comprising:

the clamping device comprises an upper clamping block and a lower clamping block which are matched with each other, wherein the upper clamping block and the lower clamping block are used for clamping a connecting rod;

the base is provided with a first connecting part used for being connected with the bone screw locking device and a second connecting part used for being connected with the lower clamping block, and the second connecting part is in spherical hinge connection with the lower clamping block;

and the ball head screw rod sequentially penetrates through the second connecting part, the lower clamping block and the upper clamping block and is connected with the tightening nut.

2. The connecting rod locking device according to claim 1, wherein the ball-end screw is provided with a limiting protrusion protruding in a radial direction, and the lower clamping block is provided with a limiting clamping groove matched with the limiting protrusion.

3. The connecting rod locking device according to claim 2, wherein a first elastic member is provided in the second connecting portion, and the first elastic member abuts against a ball end of the ball-end screw.

4. The connecting rod locking device according to any one of claims 1 to 3, wherein the upper clamping block and the lower clamping block are slidably connected, the relative sliding direction is perpendicular to the axis of the ball screw, and a second elastic member for automatically returning the upper clamping block is provided between the upper clamping block and the lower clamping block.

5. The link locking device according to claim 4, wherein a side surface of the upper block is provided with an operating portion for facilitating pushing and pulling of the upper block by hand, the operating portion being provided protrudingly with respect to the side surface of the upper block.

6. An external fixator comprising a bone screw locking device and a linkage locking device, wherein the linkage locking device is as claimed in any one of claims 1 to 5.

7. The external fixation bracket of claim 6, comprising a single-skinned self-tapping screw secured by the bone screw locking device.

8. The external fixation bracket of claim 7, wherein the outer surface of the monocortical self-tapping screw is provided with a limit indicator at a predetermined distance from the self-tapping tip.

9. An external fixation bracket as claimed in any one of claims 6 to 8, wherein the bone screw locking means comprises:

the L-shaped connecting arm, one end of which is detachably and fixedly connected with the first connecting part;

the pressing piece is arranged on the outer side of the connecting arm;

the tightening bolt penetrates through the pressing piece and is in threaded connection with the connecting arm;

a spherical tightening member located between the compression member and the connecting arm, the tightening member being provided with a central passage through which the bone screw passes, the tightening member being forcibly elastically deformable to tighten the bone screw.

10. An external fixation bracket as claimed in claim 9, wherein the outer surface of the cinch is ribbed for increased friction.

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