CN216221572U - Acetabular file device - Google Patents

Abstract

The utility model discloses an acetabular file device, which comprises a file and a positioning needle, wherein the file comprises a cutter bar and a plurality of first cutter bodies arranged on the cutter bar, the first cutter bodies are arranged in a circumferential array by taking the central line of the cutter bar as a circle center line, one end of the cutter bar, which is used for being close to an acetabular fossa, is provided with a positioning hollow tube, the needle tip of the positioning needle is inserted into the central position of the acetabular fossa, one end, which is far away from the needle tip, of the positioning needle is guided into the positioning hollow tube, the positioning needle is provided with a limiting structure, the limiting structure is used for abutting against the acetabular fossa to limit the insertion depth of the positioning needle, can ensure that the rasp can accurately find the rasp center alignment of the last time so as to achieve the purposes of improving the good installation of the joint prosthesis and ensuring the operation effect, meanwhile, the positioning needle is provided with a limiting structure for limiting the insertion depth of the positioning needle, so that the phenomenon that the positioning needle is inserted into an acetabulum socket too deeply or too shallowly can be avoided.

Description

Acetabular file device

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to an acetabular file device.

Background

In total hip replacement, a diseased femoral head in a patient needs to be taken out, a corresponding joint prosthesis is installed, and in order to enable an acetabulum socket to conform to the overall dimension of the joint prosthesis, an acetabulum file is generally adopted to file the acetabulum socket clinically. Carry out the in-process of file to the acetabular fossa, need use the acetabular bone file of different diameters from small to big in proper order according to the degree of depth of file and the size of acetabular fossa, but when changing the acetabular bone file of different sizes at every turn and carrying out the file again, hardly accurately find last file center and aim at to can lead to joint prosthesis installation badly, influence the operation effect, directly lead to the operation failure when serious.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects or shortcomings in the prior art, the utility model provides an acetabular file device, and aims to solve the technical problem that the last file center alignment is difficult to find accurately when an acetabular file with different sizes is replaced and filed again.

In order to achieve the above object, the present invention provides an acetabular file device, wherein the acetabular file device includes a file and a pilot pin; the cutting tool comprises a tool bar and a plurality of first tool bodies arranged on the tool bar, wherein the first tool bodies are arranged in a circumferential array by taking the center line of the tool bar as the circle center line, and one end of the tool bar, which is used for being close to an acetabulum socket, is provided with a positioning hollow tube; the needle point of pilot pin is used for inserting the central point who locates the acetabulum nest and puts, and the pilot pin is kept away from leading-in location hollow tube of the pointed one end of needle, is provided with limit structure on the pilot pin, and limit structure is used for with acetabulum nest butt to the depth of insertion of restriction pilot pin.

In the embodiment of the utility model, the limiting structure is detachably sleeved on the positioning needle.

In the embodiment of the utility model, a limiting thread section is formed on the positioning needle close to the tip end of the needle, the limiting structure comprises at least two arc-shaped blocks, the at least two arc-shaped blocks are spliced to form an annular part, and an inner ring of the annular part is provided with an inner thread in threaded connection with the limiting thread section.

In an embodiment of the utility model, the positioning pin is a kirschner wire.

In the embodiment of the utility model, one end of the positioning needle, which is far away from the tip end of the needle, is provided with a hollow tube end, the positioning hollow tube comprises a first positioning tube body and a second positioning tube body sleeved outside the first positioning tube body, and the hollow tube end is inserted between the first positioning tube body and the second positioning tube body.

In the embodiment of the utility model, the cutter bar comprises a first bar body and a diameter changing mechanism arranged on the first bar body, a plurality of first cutter bodies are arranged on the diameter changing mechanism in a circumferential array by taking the central line of the first bar body as a circle center line, and one end of the first bar body, which is close to the acetabulum socket, is provided with a positioning hollow tube.

In an embodiment of the utility model, a plurality of first cutter bodies are detachably arranged on the cutter bar.

In the embodiment of the utility model, the plurality of first cutter bodies are positioned on the same spherical surface.

In the embodiment of the utility model, a plurality of file teeth are uniformly formed on the first cutter body at intervals.

Through the technical scheme, the acetabular file device provided by the embodiment of the utility model has the following beneficial effects:

the acetabular file device comprises a file and a positioning needle, the file comprises a cutter bar and a plurality of first cutter bodies arranged on the cutter bar, the first cutter bodies are arranged in a circumferential array by taking the central line of the cutter bar as the circle center line, one end of the cutter bar close to an acetabular fossa is provided with a positioning hollow tube, the needle tip end of the positioning needle is used for being inserted into the central position of the acetabular fossa, one end of the positioning needle far away from the needle tip end is led into the positioning hollow tube, the positioning needle is provided with a limit structure, the limit structure is abutted against the acetabular fossa to limit the insertion depth of the positioning needle, namely when files with different sizes are replaced for filing again each time, the positioning needle inserted into the central position of the acetabular fossa does not need to be taken down, the positioning needle can be led into the positioning hollow tube of the replaced files again, the file can be ensured to accurately find the center of the last file for aligning, so as to improve the good installation of joint prosthesis, the purpose of ensuring the operation effect is achieved, and meanwhile, the positioning needle is provided with a limiting structure for limiting the insertion depth of the positioning needle, so that the phenomenon that the positioning needle is inserted into an acetabular fossa too deeply or too shallowly can be avoided.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide an 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 utility model without limiting the utility model. In the drawings:

FIG. 1 is a schematic view of the construction of an acetabular rasp device according to a first embodiment of the utility model;

FIG. 2 is a schematic view of the construction of an acetabular rasp device according to a second embodiment of the utility model;

FIG. 3 is a schematic view showing a partial structure of an acetabular file device according to a second embodiment of the utility model;

FIG. 4 is another partial structural view of the acetabular file device according to the second embodiment of the utility model;

FIG. 5 is a schematic view of the construction of an acetabular file device according to a third embodiment of the utility model;

FIG. 6 is a partial structural view of an acetabular file device according to a third embodiment of the utility model;

FIG. 7 is a schematic structural view of a first tie plate according to a third embodiment of the present invention;

FIG. 8 is a schematic view of the construction of an acetabular file device according to the fourth embodiment of the utility model;

FIG. 9 is a schematic structural view of a rotating tube assembly according to a fourth embodiment of the present invention;

FIG. 10 is a schematic view of the configuration of the positioning hollow tube of the tool holder in accordance with one embodiment of the present invention;

FIG. 11 is a schematic view of a positioning pin according to an embodiment of the present invention.

Description of the reference numerals

1 cutter bar 11 positioning hollow pipe

111 first positioning pipe 112 second positioning pipe

2 first rod body 21 screw rod thread section

3 reducing mechanism 31 mounting disc

311 sliding space 312 guide opening

321 board body of 32 sliding board

322 clamping column 33 driving component

331 first gear 332 second gear

333 arc guide groove 34 first mounting rack

341 first annular base 342 first mounting arm

35 second mount 351 frame body

352 spiral lifting mechanism 36X-shaped scaling bracket

361 first connecting plate 362 second connecting plate

363 first hinge 364 mount

3641 side plate 3642 bottom plate

3643 mounting plate 3644 slide hole

3645 fabrication hole 365 sliding block

3651 hinge 3652 intermediate connection

3653 second rod body of spacing part 4

5 support plate 51 first support part

52 second support 6 swivel tube assembly

61 inner sleeve 611 mounting hole

612 installation cavity 62 outer sleeve

621 spacing hole 63 bullet post spare

631 elastic member 632 spring post body

633 flange 64 support seat

7 first 8 second cutter body

9 locating pin 91 limit structure

911 arc block 92 limit thread section

93 hollow pipe end

Detailed Description

The following detailed description of specific embodiments of the utility model refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the utility model and are not restrictive thereof.

An acetabular file device according to the utility model is described below with reference to the accompanying drawings.

As shown in fig. 1, 2, 5 and 8, in an embodiment of the present invention, there is provided an acetabular file device, wherein the acetabular file device includes:

the file comprises a cutter bar 1 and a plurality of first cutter bodies 7 arranged on the cutter bar 1, wherein the first cutter bodies 7 are arranged in a circumferential array by taking the center line of the cutter bar 1 as a circular center line, and one end of the cutter bar 1, which is close to an acetabulum socket, is provided with a positioning hollow tube 11; and

the positioning needle 9 is characterized in that the needle tip of the positioning needle 9 is inserted into the center of an acetabulum fossa, and one end of the positioning needle 9 far away from the needle tip is guided into the positioning hollow tube 11.

When the acetabular file device is used for filing an acetabular fossa and files once again by replacing files with different sizes, the positioning needle 9 inserted in the central position of the acetabular fossa does not need to be taken down, the positioning needle 9 can be guided into the positioning hollow tube 11 of the replaced file again, and the file can be ensured to accurately find the last file center to be aligned, so that the aims of improving the installation of a joint prosthesis and ensuring the operation effect are fulfilled.

Specifically, in the first embodiment of the present invention, the cutter bar 1 of fig. 1 is formed with a positioning hollow tube 11, and the positioning needle 9 can be introduced into the positioning hollow tube 11; in the second and third embodiments of the present invention, the first rod body 2 in fig. 2 and 5 is formed with a positioning hollow tube 11, and the positioning needle 9 can be introduced into the positioning hollow tube 11; in the fourth embodiment of the present invention, the second lever body 4 in fig. 8 is also formed with a positioning hollow tube 11, and the positioning needle 9 can be guided into the positioning hollow tube 11.

As shown in fig. 2 and 5, in the second and third embodiments of the present invention, the tool holder 1 includes a first holder body 2 and a diameter-varying mechanism 3 disposed on the first holder body 2, a plurality of first tool bodies 7 are disposed on the diameter-varying mechanism 3 in a circumferential array with a center line of the first holder body 2 as a circle center, and one end of the first holder body 2 near an acetabular socket is disposed as a positioning hollow tube 11. When the acetabular file device is used for filing for the first time, two adjacent first cutter bodies 7 in the first cutter bodies 7 can be spliced with each other, the cutting diameter of the acetabular file device is the smallest at the moment, then the first cutter bodies 7 can be driven by the reducing mechanism 3 to perform reducing operation, so that the two adjacent first cutter bodies 7 in the first cutter bodies 7 are arranged at intervals, the cutting diameter of the acetabular file device is increased at the moment, and the cutting diameter can be gradually increased, and therefore the number of times for replacing files can be reduced in the filing process of the acetabular cup device.

As shown in fig. 2 to 4, in the second embodiment of the present invention, the reducing mechanism 3 includes a mounting plate 31, a plurality of sliding plates 32 and a driving assembly 33, the mounting plate 31 is circumferentially disposed on the first rod body 2 along an outer peripheral side of the first rod body 2, the plurality of sliding plates 32 are circumferentially arrayed and movably disposed on the mounting plate 31 with a center line of the first rod body 2 as a center line, the plurality of first blades 7 are disposed on one end of the plurality of sliding plates 32 extending out of the mounting plate 31 in a one-to-one correspondence manner, and the driving assembly 33 is disposed on the mounting plate 31 and respectively connected to the plurality of sliding plates 32, so as to drive the plurality of sliding plates 32 to respectively move in a direction close to or far from the center line of the first rod body 2. The plurality of first cutter bodies 7 are arranged on the plurality of sliding plates 32 in a one-to-one correspondence manner, so that when the plurality of sliding plates 32 are driven by the driving assembly 33 to respectively move along the direction close to the central line of the first rod body 2, the plurality of first cutter bodies 7 can move along with the corresponding sliding plates 32, so that the cutting diameter of the whole acetabular file device is reduced; when the driving assembly 33 drives the sliding plates 32 to move along the direction away from the center line of the first rod body 2, the first cutters 7 can move along with the corresponding sliding plates 32, so that the cutting diameter of the whole acetabular file device is increased, and the diameter changing operation of the first cutters 7 on the plane where the mounting disc 31 is located can be realized.

In the second embodiment of the present invention, the mounting plate 31 is provided with a plurality of sliding spaces 311 with lateral openings, the plurality of sliding spaces 311 are arranged in a circumferential array with the center line of the first rod body 2 as the center line, and the plurality of sliding plates 32 are movably arranged in the sliding spaces 311 in a one-to-one correspondence manner, so that the guiding effect can be achieved by the arrangement of the sliding spaces 311. Specifically, the mounting plate 31 is circular, and the sliding space 311 is provided to extend in a radial direction of the mounting plate 31. Of course, the present invention is not limited thereto, and the mounting plate 31 may be further provided with a slide rail, and the sliding plate 32 is movably disposed on the slide rail.

In the second embodiment of the present invention, the sliding plate 32 includes a plate body 321 and a locking pin 322 disposed on the plate body 321, the plate body 321 is movably disposed in the sliding space 311, the first blade 7 is disposed at one end of the plate body 321 extending out of the sliding space 311, a guiding opening 312 is disposed on a bottom wall of the sliding space 311, and the locking pin 322 extends out of the guiding opening 312 and is connected to the driving component 33, so as to facilitate connection between the driving component 33 and the sliding plate 32, and at the same time, the guiding opening 312 can play a role in guiding the sliding plate 32 again. Specifically, the guiding opening 312 extends along the arrangement direction of the sliding space 311, and the locking post 322 may be detachably disposed on the board body 321. Specifically, a first connecting piece is further disposed at an end of the board body 321 away from the clamping post 322, and the first connecting piece is used for detachably mounting the first blade 7 on the board body 321.

In the second embodiment of the present invention, the guide opening 312 penetrates through the bottom wall of the sliding space 311, and the width of the guide opening 312 is smaller than the width of the bottom wall of the sliding space 311, so that the sliding plate 32 can be stably installed in the sliding space 311, and the convenience in processing the guide opening 312 can be improved. Of course, the present invention is not limited thereto, and the width of the guide opening 312 may also be equal to or greater than the width of the bottom wall of the sliding space 311, and at this time, the guide opening 312 does not penetrate through the bottom wall of the sliding space 311, that is, the guide opening 312 is not communicated with the lateral opening of the sliding space 311.

In the second embodiment of the present invention, the driving component 33 includes a first gear 331 sleeved on the first rod body 2 and a second gear 332 engaged with the first gear 331, the first gear 331 is provided with a plurality of arc-shaped guide slots 333, the plurality of arc-shaped guide slots 333 are arranged in a circumferential array with a center line of the first rod body 2 as a circle center line, the plurality of engagement posts 322 are correspondingly inserted into the plurality of arc-shaped guide slots 333 one by one, and the second gear 332 is used for driving the first gear 331 to rotate so as to drive the engagement posts 322 to perform a compound motion in the arc-shaped guide slots 333 and the guide openings 312. The compound motion refers to arc motion of the clamping column 322 in the arc-shaped guide groove 333 and linear motion in the guide opening 312, and synchronous linkage of the plurality of sliding plates 32 can be realized through the arrangement of the first gear 331 and the second gear 332. Of course, the present invention is not limited thereto, and the driving assembly 33 may also include a plurality of pneumatic drivers, which are disposed in one-to-one correspondence with the plurality of sliding plates 32.

In the second embodiment of the present invention, the number of teeth of the first gear 331 is larger than that of the second gear 332, so that a power saving effect can be achieved. Specifically, the driving assembly 33 further includes a rotating electrical machine disposed on the mounting plate 31, the second gear 332 is sleeved on an output shaft of the rotating electrical machine, the rotating electrical machine and the second gear 332 can be disposed on two sides of the mounting plate 31, and the output shaft of the rotating electrical machine passes through the mounting plate 31.

Referring to fig. 5 to 7, in a third embodiment of the present invention, the reducing mechanism 3 includes a first mounting frame 34, a second mounting frame 35, and a plurality of X-shaped zooming brackets 36, the first mounting frame 34 is circumferentially disposed on the first rod body 2 along an outer peripheral side of the first rod body 2, the second mounting frame 35 is liftably sleeved on the first rod body 2, two ends of each X-shaped zooming bracket 36 are respectively movably hinged to the first mounting frame 34 and the second mounting frame 35, the plurality of X-shaped zooming brackets 36 are circumferentially arranged in an array with a center line of the first rod body 2 as a circle center line, the plurality of first cutters 7 are disposed outside the plurality of X-shaped zooming brackets 36 in a one-to-one correspondence manner, and the second mounting frame 35 is configured to drive the plurality of X-shaped zooming brackets 36 to perform zooming movement. The plurality of first cutter bodies 7 are correspondingly arranged on the plurality of X-shaped scaling brackets 36 one by one, so that when the second mounting frame 35 moves towards the direction close to the first mounting frame 34, the plurality of X-shaped scaling brackets 36 can be driven to extend towards the direction far away from the central line of the first rod body 2, and the plurality of first cutter bodies 7 can move along with the corresponding X-shaped scaling brackets 36, so that the cutting diameter of the whole acetabular file device is increased; when the second mounting frame 35 moves away from the first mounting frame 34, the plurality of X-shaped scaling brackets 36 can be driven to retract towards the direction close to the central line of the first rod body 2, and the plurality of first cutter bodies 7 can move along with the corresponding X-shaped scaling brackets 36, so that the cutting diameter of the whole acetabular file device is reduced, and the diameter changing operation of the plurality of first cutter bodies 7 can be realized.

In the third embodiment of the present invention, the X-shaped pantograph bracket 36 includes a first link plate 361, a second link plate 362 and a mounting seat 364, the first link plate 361 and the second link plate 362 are hinged in an X-shape by a first hinge 363, a first end of the first link plate 361 is hinged to the first mounting frame 34, a first end of the second link plate 362 is hinged to the second mounting frame 35, a second end of the first link plate 361 is movably disposed on the mounting seat 364, a second end of the second link plate 362 is hinged to the mounting seat 364, and the first blade 7 is disposed outside the mounting seat 364. That is, the first end of the first connecting plate 361 and the first end of the second connecting plate 362 are both close to the first rod body 2, the second end of the first connecting plate 361 and the second end of the second connecting plate 362 are both far away from the first rod body 2, the first end of the first connecting plate 361 can be hinged to the first mounting frame 34 through the second hinge, the first end of the second connecting plate 362 can be hinged to the second mounting frame 35 through the third hinge, and the second end of the second connecting plate 362 can be hinged to the mounting seat 364 through the fourth hinge. Further, the first link plate 361 and the second link plate 362 have the same length, and the first hinge 363 sequentially passes through the middle of the first link plate 361 and the middle of the second link plate 362.

In the third embodiment of the present invention, the second end of the first connecting plate 361 is provided with a sliding block 365, the mounting seat 364 is provided with a sliding groove extending from the second end of the first connecting plate 361 toward the second end of the second connecting plate 362, and the sliding block 365 is movably disposed in the sliding groove. That is, when the X-shaped zoom bracket 36 is extended in a direction away from the center line of the first lever body 2, the second end of the first link plate 361 is movable on the mount 364 in a direction toward the second end of the second link plate 362, and when the X-shaped zoom bracket 36 is retracted in a direction toward the center line of the first lever body 2, the second end of the first link plate 361 is movable on the mount 364 in a direction away from the second end of the second link plate 362.

In the third embodiment of the present invention, the mounting base 364 includes two side plates 3641 and a bottom plate 3642 connecting the two side plates 3641, the two side plates 3641 are both extended from the bottom plate 3642 toward a direction away from the first connecting plate 361, the first blade 7 is disposed on a side of the two side plates 3641 away from the bottom plate 3642, a sliding hole 3644 is formed in the bottom plate 3642 to form a sliding groove, the sliding block 365 includes a hinge portion 3651, an intermediate connecting portion 3652 and a position-limiting portion 3653 connected in sequence, the hinge portion 3651 is hinged to the second end of the first connecting plate 361, the intermediate connecting portion 3652 extends into the sliding hole 3644, so that a side of the position-limiting portion 3653 close to the hinge portion 3651 abuts against the bottom plate 3642. The sliding block 365 can stably move on the mounting seat 364 by providing the limiting part 3653, and the mounting seat 364 is composed of two side plates 3641 and a bottom plate 3642 so as to play a role of reducing weight. Furthermore, the dimension of the intermediate connecting portion 3652 in the width direction of the sliding hole 3644 is smaller than or equal to the width of the sliding hole 3644, and the dimensions of the hinge portion 3651 and the stopper portion 3653 in the width direction of the sliding hole 3644 are both larger than the width of the sliding hole 3644, so that the side of the hinge portion 3651 facing the stopper portion 3653 is in contact with the outer side of the bottom plate 3642, and the side of the stopper portion 3653 facing the hinge portion 3651 is in contact with the inner side of the bottom plate 3642.

In the third embodiment of the present invention, the mounting seat 364 further includes a plurality of mounting plates 3643 connecting the two side plates 3641, the plurality of mounting plates 3643 are sequentially disposed at intervals, and the first blade 7 is connected to the plurality of mounting plates 3643, respectively. Specifically, a second connector is provided on each of the plurality of mounting plates 3643 for detachably mounting the first blade 7 to the mounting block 364.

In the third embodiment of the present invention, a plurality of process holes 3645 are formed on both the side plates 3641. The arrangement of the plurality of fabrication holes 3645 may further play a role of weight reduction.

In the third embodiment of the present invention, the first mounting bracket 34 includes a first annular base 341 circumferentially disposed on the first rod body 2 along an outer peripheral side of the first rod body 2, and a plurality of first mounting arms 342 circumferentially disposed on the first annular base 341 in a circumferential array with a center line of the first rod body 2 as a center line, and first ends of the plurality of first connecting plates 361 are hinged to the plurality of first mounting arms 342 in a one-to-one correspondence. A plurality of first installation arms 342 are detachably disposed on the first annular base 341, one end of the first installation arm 342 away from the first annular base 341 is provided with a first connection ear plate, the first end of the first connection plate 361 and the first connection ear plate are stacked, and the second hinge member sequentially penetrates through the first end of the first connection plate 361 and the first connection ear plate.

In the third embodiment of the present invention, the screw thread section 21 is formed on the outer peripheral side of the first lever body 2, and the second mounting bracket 35 includes a bracket body 351 and a screw elevating mechanism 352 provided on the bracket body 351, and the screw elevating mechanism 352 is sleeved on the screw thread section 21. That is, the second mount 35 can perform the elevating movement on the first lever body 2 by the screw elevator. Of course, the utility model is not limited thereto and other suitable lifting structures are possible. Specifically, the frame body 351 includes a second annular base sleeved on the spiral lifting mechanism 352 and a plurality of second mounting arms disposed on the second annular base in a circumferential array with the center line of the first rod body 2 as the center line, and the first ends of the second connecting plates 362 are hinged to the second mounting arms in a one-to-one correspondence manner. A plurality of second installation arms are detachably arranged on the second annular base, one end, far away from the second annular base, of each second installation arm is provided with a second connection lug plate, the first end of the second connection lug plate 362 is overlapped with the second connection lug plate, and the third hinge piece sequentially penetrates through the first end of the second connection lug plate 362 and the second connection lug plate.

As shown in fig. 8 and 9, in the fourth embodiment of the present invention, the tool bar 1 includes a second bar body 4, a plurality of support plates 5 and a plurality of rotary tube assemblies 6, the plurality of support plates 5 are arranged on the second bar body 4 in a circumferential array with a center line of the second bar body 4 as a circle center line, the plurality of rotary tube assemblies 6 are arranged in one-to-one correspondence with the plurality of support plates 5, the file further includes a plurality of second tool bodies 8, the plurality of first tool bodies 7 and the plurality of second tool bodies 8 are arranged in one-to-one correspondence to form a plurality of tool body groups, the plurality of tool body groups and the plurality of rotary tube assemblies 6 are arranged in one-to-one correspondence, the first tool bodies 7 and the second tool bodies 8 in each tool body group are arranged on the corresponding rotary tube assemblies 6 at intervals, the rotary tube assemblies 6 are used for driving the first tool bodies 7 and the second tool bodies 8 to rotate, and a cutting diameter of the first tool bodies 7 is smaller than a cutting diameter of the second tool bodies 8. Namely, the positions of the first cutter body 7 and the second cutter body 8 can be adjusted by rotating the rotary pipe component 6, and simultaneously, because the cutting diameter of the first cutter body 7 is smaller than that of the second cutter body 8, when a plurality of first cutter bodies 7 are rotated to the outer side of the whole acetabulum file device, the acetabulum fossa can be filed by utilizing the plurality of first cutter bodies 7; then when all rotating a plurality of second cutter bodies 8 to the outside of whole acetabular bone file device again to can utilize a plurality of second cutter bodies 8 to carry out the file processing to acetabular bone nest, thereby can realize acetabular bone file device's reducing operation.

In the fourth embodiment of the present invention, the rotary tube assembly 6 includes an inner sleeve 61, an outer sleeve 62, two spring columns 63 and two supporting seats 64, the inner sleeve 61 is disposed on the supporting plate 5 and is inclined toward the second rod body 4, the two spring columns 63 are disposed at intervals on the peripheral side of the inner sleeve 61, two limiting holes 621 are disposed at intervals on the outer sleeve 62, the outer sleeve 62 is sleeved on the inner sleeve 61, the two spring columns 63 extend out of the outer sleeve 62 from the two limiting holes 621 in a one-to-one correspondence manner, the two supporting seats 64 are disposed at intervals on the peripheral side of the outer sleeve 62, and the first cutter body 7 and the second cutter body 8 are disposed outside the two supporting seats 64. It should be noted that the outer side of the support base 64 may be the side facing away from the outer sleeve 62. That is, when the first cutter body 7 needs to be switched to the second cutter body 8 for grinding, the outer sleeve 62 can be rotated to make one of the elastic column members 63 on the inner sleeve 61 separate from the restriction of the previous restricting hole 621 and extend out of the outer sleeve 62 from the next restricting hole 621, although the other elastic column member 63 on the inner sleeve 61 can also realize the above operation accordingly. Of course, the present invention is not limited to this, and it is also possible to provide a rotary table directly on the support plate 5, and it is also possible to provide the outer sleeve 62 directly on the rotary table for rotation. Specifically, the number of the elastic column members 63 is not limited to two, at least two elastic column members 63 are disposed on the same cross section of the inner sleeve 61, and at least two elastic column members 63 on the same cross section of the inner sleeve 61 are uniformly spaced, and at least two elastic column members 63 may be spaced in a direction parallel to the center line of the inner sleeve 61 on the outer circumferential side of the inner sleeve 61, of course, the limiting hole 621 on the outer sleeve 62 needs to be correspondingly disposed according to the arrangement of the elastic column members 63 on the inner sleeve 61, so as to ensure the stability of the rotating tube assembly 6.

In addition, a third connecting member is provided on each of the two support seats 64, and the third connecting member is used for detachably mounting the first cutter body 7 or the second cutter body 8 on the support seat 64.

In the fourth embodiment of the present invention, the inner sleeve 61 is provided with a mounting hole 611, a mounting cavity 612 is disposed on the inner side of the inner sleeve 61 corresponding to the mounting hole 611, and the stud 63 includes an elastic element 631 received in the mounting cavity 612 and a stud body 632 extending out of the mounting cavity 612 under the driving of the elastic element 631. When the outer sleeve 62 is not rotated, the pin body 632 can extend out of the mounting hole 611 and the limiting hole 621 under the driving action of the elastic force of the elastic element 631, and when the outer sleeve 62 is rotated, the pin body 632 is compressed by the elastic element 631 due to the pressure of the outer sleeve 62, so that the pin body 632 retracts into the mounting cavity 612, and the rotation of the outer sleeve 62 can be smoothly completed.

In the fourth embodiment of the present invention, the elastic member 631 may be a spring, the mounting hole 611 penetrates through the bottom wall of the mounting cavity 612, the diameter of the spring is larger than the diameter of the mounting hole 611, a flange portion 633 abutting against the inner wall of the inner tube 61 is formed on the outer peripheral side of the stud body 632, and the spring is sleeved on the stud body 632 and abuts against the side of the flange portion 633 away from the inner wall of the inner tube 61. The spring can be fixed on the bottom wall of the mounting cavity 612, one end of the elastic column body 632 is arranged in the spring in a penetrating way and can pass through the through hole of the bottom wall of the mounting cavity 612 in the mounting hole 611, and the diameter of the flange portion 633 of the elastic column body 632 is larger than that of the spring and is abutted against one end of the spring far away from the bottom wall of the mounting cavity 612, so that the spring can be limited between the bottom wall of the mounting cavity 612 and the flange portion 633, when the elastic column body 632 is under the pressure action of the outer sleeve 62, the flange portion 633 of the elastic column body 632 compresses the spring, the elastic column body 632 descends, and one end extending out of the inner sleeve 61 and extending into the limit hole 621 can retract into the mounting cavity 612.

In the fourth embodiment of the present invention, the support plate 5 includes a first support portion 51 disposed on the second lever body 4 and extending in a radial direction of the second lever body 4, and a second support portion 52 extending from the first support portion 51 in a bent manner, an included angle formed by a side surface of the first support portion 51 facing the cutter body group and a side surface of the second support portion 52 facing the cutter body group is greater than 90 degrees and less than 180 degrees, and the rotary tube assembly 6 is disposed on a side surface of the second support portion 52 facing the cutter body group. A sufficient space for arranging the cutter body group can be secured by providing the first support portion 51 having one end extending in the radial direction of the second lever body 4 on the support plate 5, and providing the second support portion 52 having one end extending while being bent on the end of the first support portion 51 away from the second lever body 4, thereby making it possible to make the cutting operation of the plurality of first cutter bodies 7 or the plurality of second cutter bodies 8 approximately spherical. Further, the inner tube 61 is detachably provided on the second support portion 52.

In the fourth embodiment of the utility model, the cutter body group further comprises at least one cutting cutter body different from the cutting diameter of the first cutter body 7 and the second cutter body 8. The cutter body group can comprise a plurality of cutting cutter bodies with different cutting diameters, and the number of diameter-changing operations of the whole acetabular file device can be determined according to the number of the cutting cutter bodies in the cutter body group, so that the number of times of file replacement can be further reduced.

As shown in figure 11, in the embodiment of the utility model, the positioning needle 9 is provided with a limiting structure 91, and the limiting structure 91 is used for abutting against an acetabulum socket so as to limit the insertion depth of the positioning needle 9. Thereby avoiding the phenomenon that the positioning pin 9 is inserted into the acetabulum fossa deeply or shallowly, and ensuring the filing accuracy of the acetabular file device.

In the embodiment of the present invention, the position-limiting structure 91 is detachably sleeved on the positioning needle 9. The stopper 91 can be removed from the positioning pin 9 after the positioning pin 9 is inserted into the acetabulum socket to a set depth to enable filing to be facilitated.

In the embodiment of the utility model, a limiting thread section 92 is formed on the positioning needle 9 close to the tip of the needle, the limiting structure 91 comprises at least two arc-shaped blocks 911, the at least two arc-shaped blocks 911 are used for being spliced to form an annular part, and an inner ring of the annular part is provided with an inner thread which is in threaded connection with the limiting thread section 92. When installing limit structure 91 on pilot pin 9 promptly, can form the cyclic annular piece with two at least arc piece 911 amalgamations earlier, then the closure sets up on the spacing screw thread section 92 of pilot pin 9 soon to can restrict the depth of insertion of pilot pin 9, inserting the pilot pin 9 and setting for the degree of depth after, continue rotatory cyclic annular piece until unscrewing spacing screw thread section 92, thereby can take off two at least arc pieces 911.

In an embodiment of the present invention, the positioning pin 9 may be a k-wire. Of course, the present invention is not limited thereto, and other suitable needles may be used for the positioning needle 9.

Referring to fig. 10 and 11, in the embodiment of the present invention, one end of the positioning needle 9 away from the needle tip is provided as a hollow tube end 93, the positioning hollow tube 11 includes a first positioning tube 111 and a second positioning tube 112 sleeved outside the first positioning tube 111, and the hollow tube end 93 is inserted between the first positioning tube 111 and the second positioning tube 112. That is, the diameter of the hollow tube end 93 is larger than the diameter of the first positioning tube body 111 and smaller than the diameter of the second positioning tube body 112, so that the hollow tube end 93 can be inserted into the gap between the first positioning tube body 111 and the second positioning tube body 112, whereby the alignment with the center of the rasping in the previous time can be further ensured.

Referring to fig. 2, 5 and 8, the first cutter body 7 is detachably provided. Specifically, in the second embodiment of the acetabular file device of the utility model, the first cutter body 7 is detachably provided on the corresponding sliding plate 32, in the third embodiment of the acetabular file device of the utility model, the first cutter body 7 is detachably provided on the corresponding X-shaped pantograph bracket 36, and in the fourth embodiment of the acetabular file device of the utility model, both the first cutter body 7 and the second cutter body 8 are detachably provided on the rotating tube assembly 6, thereby facilitating replacement and maintenance of the first cutter body 7.

Referring to fig. 2, 5 and 8, in the embodiment of the present invention, a plurality of rasp teeth are formed on the first cutter body 7 at regular intervals.

Referring to fig. 2, 5 and 8, in the embodiment of the present invention, the first cutter bodies 7 are on the same spherical surface, and the second cutter bodies 8 may also be on the same spherical surface.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (9)

1. An acetabular file device, comprising:

the file comprises a cutter bar (1) and a plurality of first cutter bodies (7) arranged on the cutter bar (1), wherein the first cutter bodies (7) are arranged in a circumferential array by taking the center line of the cutter bar (1) as a circular center line, and one end of the cutter bar (1) close to an acetabulum socket is provided with a positioning hollow pipe (11); and

the positioning device comprises a positioning needle (9), wherein the needle tip of the positioning needle (9) is used for being inserted into the center of an acetabulum socket, one end, far away from the needle tip, of the positioning needle (9) is guided into a positioning hollow tube (11), a limiting structure (91) is arranged on the positioning needle (9), and the limiting structure (91) is used for being abutted against the acetabulum socket so as to limit the insertion depth of the positioning needle (9).

2. The acetabular filing device of claim 1, wherein the stopper (91) is removably sleeved on the pilot pin (9).

3. The acetabular file device according to claim 2, characterized in that the pilot pin (9) is formed with a limiting thread section (92) near the pin tip, the limiting structure (91) comprising at least two arc-shaped blocks (911) for mating to form a ring, the inner ring of which is formed with an internal thread in threaded connection with the limiting thread section (92).

4. The acetabular file device according to claim 1, wherein the pilot pin (9) is a k-wire.

5. The acetabular file device according to claim 1, wherein an end of the positioning needle (9) away from the needle tip is provided as a hollow tube end (93), the positioning hollow tube (11) comprises a first positioning tube body (111) and a second positioning tube body (112) sleeved outside the first positioning tube body (111), and the hollow tube end (93) is inserted between the first positioning tube body (111) and the second positioning tube body (112).

6. The acetabular file device according to any one of claims 1 to 5, wherein the tool bar (1) comprises a first bar body (2) and a reducing mechanism (3) arranged on the first bar body (2), a plurality of first tool bodies (7) are arranged on the reducing mechanism (3) in a circumferential array around a center line of the first bar body (2), and one end of the first bar body (2) close to the acetabular fossa is provided as the positioning hollow tube (11).

7. The acetabular file device according to any one of claims 1 to 5, wherein a plurality of the first cutter bodies (7) are detachably arranged on the cutter bar (1).

8. The acetabular filing device according to any one of claims 1 to 5, wherein a plurality of the first cutter bodies (7) are on the same spherical surface.

9. The acetabular filing device according to any one of claims 1 to 5, wherein the first cutter body (7) has a plurality of file teeth formed thereon at regular intervals.

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