CN215821065U - Acetabular bone rasping device - Google Patents

Abstract

The utility model provides an acetabular bone filing device which comprises a holding part, a positioning part, a sleeve, a connecting shaft, a filing head and a connecting assembly, wherein the positioning part is connected with the holding part and is used for being attached to an acetabular bone, the sleeve is provided with a shaft hole extending along the axial direction of the sleeve, the connecting shaft is rotationally matched with the shaft hole and is connected with the filing head, the connecting assembly is used for connecting the sleeve and the holding part, the connecting assembly comprises a guide part detachably connected with the sleeve, when the sleeve is connected with the guide part, the guide part and the sleeve are mutually limited in the radial direction of the sleeve, and the sleeve can move relative to the guide part in the axial direction of the sleeve. According to the acetabular bone rasping device provided by the utility model, the positioning part is attached to the acetabulum to realize good positioning, so that when the holding part is held, the sleeve cannot shake randomly, the acetabulum can be rasped stably when the file head is driven by the connecting shaft to rotate relative to the sleeve, and the sleeve can slide relative to the guide part, so that the rasping depth of the file head to the acetabulum can be controlled.

Description

Acetabular bone rasping device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an acetabulum rasp device.

Background

Total Hip Arthroplasty (THA) has now become the most mature replacement for prosthetic joints. As the number of THA procedures increases, so too does the variety of primary and secondary acetabular defects. For acetabular defects, if not filled with filler, it is difficult to restore the center of motion of the hip to an anatomical position to establish normal hip function. The acetabular defect rasp plays a very important role in the filling block implantation process, and is mainly used for rasping irregular defect parts, so that the rasped grooves can accurately place the filling blocks, and the activity center of the hip joint is restored to an anatomical position.

However, the acetabular defect is usually filed manually at present, the filing method has poor stability, the size of the filed groove is difficult to control accurately due to easy random shaking, and the filing method has great relation with the operation experience of an operator, namely, the dependence on the operation skill of the operator is great, so the filing method has the problems of poor operation stability and difficult operation.

SUMMERY OF THE UTILITY MODEL

Based on the technical scheme, the utility model provides the acetabulum rasping device which improves the convenience and stability of operation.

The utility model provides an acetabular rasping device, which comprises:

a grip;

the positioning part is connected with the holding part and is used for being attached to the acetabulum;

a sleeve having a shaft hole extending in an axial direction thereof;

the connecting shaft is in rotating fit with the shaft hole;

a file head, the connecting shafts being connected, an

The connecting assembly is used for connecting the sleeve and the holding piece, the connecting assembly comprises a guide piece detachably connected with the sleeve, when the sleeve is connected with the guide piece, the guide piece and the sleeve are mutually limited in the radial direction of the sleeve, and the sleeve can move relative to the guide piece in the axial direction of the sleeve.

In one embodiment, the guide member has a jaw portion having opposing clamping arms, one of the clamping arms and the sleeve has a limiting rib, and the other of the clamping arms and the sleeve has a limiting groove, and the limiting rib is slidably engaged with the limiting groove.

In one embodiment, the guide part is provided with a guide part which is movably connected with the holding part so as to adjust the installation distance between the sleeve and the holding part, and the connecting assembly comprises a locking block which is connected with the holding part and is used for controllably locking or releasing the relative position of the guide part and the holding part.

In one embodiment, the grip is provided with a mounting groove and a first jack, the locking block is mounted in the mounting groove, the locking block is provided with a second jack, the guide portion penetrates through the first jack and the second jack, an elastic element is arranged between the locking block and the grip, when the locking block is pressed, the locking block moves from a first position to a second position, when the locking block is released to be pressed, the locking block is driven by the elastic element to reset to the first position, when the locking block is located at the first position, the guide portion is limited by the locking block, and when the locking block is located at the second position, the guide portion can move relative to the locking block along the length direction of the guide portion.

In one embodiment, the guide portion is provided with a plurality of clamping grooves, the clamping grooves are arranged at intervals along the length direction of the guide portion, clamping protrusions are formed on the locking block, when the locking block is located at a first position, the clamping protrusions can be clamped with the clamping grooves, and when the locking block is located at a second position, the clamping protrusions are removed from the clamping grooves.

In one embodiment, one of the guide member and the holding member is provided with a locking portion, the other of the guide member and the holding member is provided with a locking groove, and the locking portion is matched with the locking groove.

In one embodiment, when the buckling part is matched with the clamping groove, the guide piece is axially limited on the holding piece, and the guide piece is circumferentially limited on the holding piece.

In one embodiment, the locking portion includes a boss and a guide post connected to each other, the engaging groove includes a first groove and a second groove communicated with each other, when the locking portion is engaged with the engaging groove, the boss is limited in the first groove in the circumferential direction of the guide, and the guide post is limited in the second groove in the axial direction of the guide.

In one embodiment, a slot is disposed on a peripheral side of the guide post, a plunger is disposed on an inner wall of the second slot, and when the fastening portion is engaged with the engaging slot, the plunger is engaged with the slot.

In one embodiment, the connecting assembly further comprises a connecting block, a first connecting portion is arranged at one end of the connecting block, a second connecting portion is arranged at the other end of the connecting block, the first connecting portion is identical to the buckling portion in structure, and the second connecting portion is identical to the buckling groove in structure.

In one embodiment, the connecting assembly comprises a plurality of connecting blocks.

In one embodiment, the holding piece is provided with a plurality of clamping grooves, the depths of the clamping grooves are different, and when the buckling part is matched with the clamping grooves with different depths, the lengths of structures extending into the clamping grooves by the buckling part are different; or

The gripping piece is provided with a plurality of buckling parts, and the axial lengths of the buckling parts are different.

In one embodiment, the connection assembly includes a plurality of guides, the guides being of different lengths.

The utility model provides an acetabulum filing device, which comprises a holding part, a positioning part, a sleeve, a connecting shaft, a filing head and a connecting assembly, wherein the connecting shaft is rotationally matched with a shaft hole of the sleeve, the connecting assembly connects the sleeve with the holding part, the connecting shaft is rotationally connected with the sleeve and is connected with the positioning part, and good positioning is realized by utilizing the fitting of the positioning part and the acetabulum, so that when the holding part is held, the sleeve cannot shake at will, so that when the connecting shaft rotates relative to the sleeve to drive the filing head, the filing head can stably file the acetabulum, the filing effect is improved, and when the guide part of the connecting assembly is connected with the sleeve, the sleeve can slide relative to the guide part, thereby the filing depth of the acetabulum by the filing head can be simply and conveniently controlled, and the convenience in filing operation is improved.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the acetabular rasping device of the utility model without a connecting assembly;

FIG. 2 is a schematic view of the sleeve of the acetabular rasping device;

FIG. 3 is a schematic view of the connection between the holding member and the positioning member of the acetabular rasping device;

FIG. 4 is a schematic view of a positioning member of the acetabular rasping device;

FIG. 5 is an exploded view of the acetabular rasping device of an embodiment;

FIG. 6 is a schematic view of a guide in the acetabular rasping device in an embodiment;

FIG. 7 is a schematic view of a locking block in the acetabular rasping device in an embodiment;

FIG. 8 is a schematic front view of an acetabular rasping device in an assembled state according to an embodiment;

FIG. 9 is a cross-sectional view of the acetabular rasping device shown in FIG. 8 along section line A-A;

FIG. 10 is an exploded view of another embodiment of the acetabular rasping device;

FIG. 11 is a schematic view of the guide of the acetabular rasping device shown in FIG. 10;

FIG. 12 is an exploded view of the guide and the gripping member of the acetabular rasping device;

FIG. 13 is a schematic view of the combination construction of the acetabular rasping device shown in FIG. 10;

FIG. 14 is the acetabular rasping device shown in FIG. 13 in section S₁A schematic cross-sectional structure of (A);

FIG. 15 is an exploded view of the acetabular rasping device of the further embodiment;

FIG. 16 is a schematic view of the attachment block of the acetabular rasping device shown in FIG. 15;

FIG. 17 is a cross-sectional view of the attachment block of the acetabular rasping device shown in FIG. 16 along section line B-B;

FIG. 18 is a schematic view of the combination construction of the acetabular rasping device shown in FIG. 15;

FIG. 19 is an exploded view of the acetabular rasping device of the further embodiment;

FIG. 20 is a schematic view of the grip of the acetabular rasping device shown in FIG. 19;

FIG. 21 is the acetabular rasping device shown in FIG. 20 in section S₂Schematic cross-sectional structure of (a).

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the 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; can be mechanically or electrically connected; 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 present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Example 1

Referring to fig. 1, the present invention provides an acetabular rasping device including a grip 10, a positioning member 20, a sleeve 30, a coupling shaft 40 and a rasp head 50.

The holding member 10 is connected to the positioning member 20, and when the positioning member 20 is fitted to the acetabulum, the holding member 10 is convenient for an operator to hold and fix relative to the acetabulum. As shown in fig. 2, the sleeve 30 has a shaft hole 31 extending along the axial direction thereof, and the connecting shaft 40 is rotatably engaged with the shaft hole 31 and connected with the rasp head 50, so that when the connecting shaft 40 rotates relative to the sleeve 30, the rasp head 50 can be driven to rotate, thereby rasping the defect of the acetabulum.

In this embodiment, the acetabular bone filing device further comprises a connecting component, wherein the connecting component is connected with the sleeve 30 and the holding part 10, so that when an operator holds the column holding part 10, the sleeve 30 is not easy to shake, and therefore, the connecting shaft 40 has a good limiting effect, and the filing head 50 on the connecting shaft 40 can accurately file the acetabulum.

With continued reference to fig. 1, grip element 10 includes a stem portion 11 and a leg portion 12 connected together. Wherein the rod portion 11 is rod-shaped as a whole for easy holding, and the bracket portion 12 is used to connect with the positioning member 20.

As shown in fig. 3 and 4, the bracket portion 12 and the positioning member 20 are detachably connected to each other, so that a positioning member 20 of an appropriate type can be selected to be mounted on the bracket portion 12 as needed.

The outer surface 20a of the positioning member 20 is generally spherically curved to conform to the shape of the acetabulum, so that when the positioning member 20 is placed into the acetabulum by holding the grip member 10 in use, and the bottom 20b of the positioning member 20 is fitted to the acetabulum, the defect degree of the acetabulum can be judged according to the fitting degree of the outer surface 20a of the positioning member 20 and the acetabulum, so as to determine the amount of the rasp head 50 required to rasp the acetabulum.

The bracket part 12 is connected with the positioning part 20 in a clamping way. For example, one end of the bracket portion 12, which is far away from the rod portion 11, has a convex pillar 121, a groove 122 is disposed on the periphery of the convex pillar 121, a fixing hole 21 is disposed on an end surface of the positioning element 20, which is used for connecting with the bracket portion 12, a side hole 22 penetrating through the fixing hole 21 is disposed on the positioning element 20, when the positioning element 20 is connected with the bracket portion 12, the convex pillar 121 extends into the fixing hole 21, and the groove 122 is opposite to the side hole 22, so that after a fixing element 23, such as a jackscrew or a screw, penetrates into the fixing hole 21 from the side hole 22, the fixing element 23 abuts against the groove 122 of the convex pillar 121, so that the convex pillar 121 cannot be separated from the fixing hole 21, and the positioning element 20 is stably connected with the bracket portion 12.

The groove 122 may be an annular groove surrounding the convex pillar 121, or may be a through groove or a blind groove extending along the radial direction of the convex pillar 121, wherein when the groove 122 is the through groove, the groove 122 penetrates through the convex pillar 121, and correspondingly, when the groove 122 is the blind groove, the groove does not penetrate through the convex pillar 121. The type of the groove 122 is not limited herein, as long as the fixing member 23 can penetrate the fixing hole 21 from the side hole 22 and fix the stud 121 in the fixing hole 21.

The holder portion 12 may be formed by a plurality of arc-shaped arms 12a extending radially in the axial direction away from the rod portion 11. Alternatively, in other embodiments, the bracket portion 12 includes a plurality of arms, one end of which is connected to the rod portion 11 and the other end of which extends away from the axis of the rod portion 11 and is connected to the positioning member 20. The shape of the support portion 12 and the structure of the connecting portion between the support portion 12 and the positioning member 20 are not limited herein, as long as the positioning member 20 is connected to the support portion 12 and can be positioned in contact with the acetabulum.

As shown in connection with fig. 5, the coupling assembly includes a guide member 100 removably coupled to the sleeve 30. The detachable connection between the sleeve 30 and the guide 100 allows for flexible step-by-step installation and improved installation convenience when using the acetabular rasping device.

When the sleeve 30 is connected with the guide member 100, the guide member 100 and the sleeve 30 are limited in the radial direction of the sleeve 30, that is, the guide member 100 cannot move in the radial direction of the sleeve 30, so that when the guide member 100 is connected with the holding member 10, the holding member 10 generates radial constraint on the sleeve 30 through the guide member 100, the sleeve 30 is not easy to swing in the radial direction, an operator can improve the guiding stability of the sleeve 30 on the connecting shaft 40 by gripping the holding member 10, and when the connecting shaft 40 rotates relative to the sleeve 30, the rasp head 50 can be driven to rasp the acetabulum stably, and the rasping precision is effectively ensured.

In this embodiment, the sleeve 30 is radially constrained to the guide 100, but the sleeve 30 can move relative to the guide 100 along the axial direction thereof, that is, the sleeve 30 can move relative to the guide 100 along the axial direction of the sleeve 30, so that the filing depth of the acetabular bone by the filing head 50 can be controlled. Under this kind of structural style, acetabular bone rasp device overall structure is stable, and the rasp precision is higher to keep more bone volumes, improve the recovered effect of bone tissue. Meanwhile, the sleeve 30 has a good positioning effect on the connecting shaft 40, so that electric devices such as an electric drill and an electric handle can be adopted to drive the connecting shaft 40 to rotate relative to the sleeve 30, and the filing efficiency is effectively improved.

Referring to fig. 5 and 6, in some embodiments, the sleeve 30 is provided with a limiting rib 32, the guide 100 is provided with a jaw portion C having opposite clamping arms 101, the clamping arms 101 are provided with limiting grooves 102 slidably engaged with the limiting rib 32, and the extending direction of the limiting rib 32 is parallel to the axial direction of the sleeve 30. As shown in fig. 8 and 9, the sleeve 30 can move along its own axis relative to the guide member 100 and be radially restrained to the guide member 100 by the engagement of the restraining rib 32 with the restraining groove 102.

It should be noted that, the sliding fit between the sleeve 30 and the guide 100 is not limited to the above embodiments, for example, in other embodiments, the limiting protruding edge 32 is disposed on the clamping arm 101, the limiting groove 102 matched with the limiting protruding edge 32 is disposed on the sleeve 30, and the sliding fit between the limiting protruding edge 32 and the limiting groove 102 can also be utilized, so that the guide 100 can exert a good guiding effect on the sleeve 30 in the axial direction of the sleeve 30, and the guide 100 can exert a limiting effect in the radial direction of the sleeve 30, so that the connecting shaft 40 can drive the rasp 50 to stably rotate relative to the sleeve 30, so as to improve the rasping precision of the rasp 50 on the acetabulum.

In some embodiments, when assembling the sleeve 30 and the guide 100, the sleeve 30 can be placed between the clamping arms 101 of the jaw part C of the guide 100, the sleeve 30 is limited relative to the guide 100 in the axial direction by the matching of the limiting groove 102 and the limiting protrusion, and only the sleeve 30 moves relative to the guide 100 in the axial direction to adapt to the adjustment of the filing depth.

In some embodiments, the connecting assembly for connecting the grip 10 and the sleeve 30 can mount the sleeve 30 at a suitable distance from the grip 10, so that the rasp head 50 has a suitable rasping thickness for the acetabulum, so that the acetabulum can be rasped to fit the filler of a corresponding specification.

The mounting distance between grip 10 and sleeve 30 is adjusted by the connection assembly, and has various realizable structures. For example, in embodiment 1, as shown in fig. 5 and 6 in combination, the guide 100 is provided with a guide portion F movably connected with the grip 10 to adjust the installation distance of the sleeve 30 to the grip 10, and the connecting assembly includes a locking block 60, and the locking block 60 is connected with the grip 10 and used for controllably locking or releasing the relative position of the guide 100 and the grip 10.

Referring to fig. 3, 5 and 9, the holding member 10 is provided with an installation groove 13 and a first insertion hole 14, the locking block 60 is installed in the installation groove 13, the locking block 60 is provided with a second insertion hole 61, the guide portion F penetrates through the first insertion hole 14 and the second insertion hole 61, and a spring 70 is disposed between the locking block 60 and the holding member 10. When the locking block 60 is pressed, the locking block 60 moves from the first position to the second position, when the pressing on the locking block 60 is released, the locking block 60 returns to the first position under the driving of the spring 70, when the locking block 60 is located at the first position, the locking block 60 limits the guide part F on the holding part 10, and when the locking block 60 is located at the second position, the guide part F can move along the length direction relative to the locking block 60.

The spring 70 may be replaced by an elastic member such as an elastic rod or an elastic rod having elasticity, as long as the elastic force released by the elastic member between the locking block 60 and the grip 10 can urge the locking block 60 to return from the second position to the first position.

In some embodiments, a positioning post 131 is disposed in the mounting groove 13 of the grip 10, so as to sleeve the spring 70 on the positioning post 131, when the spring 70 is compressed, the coil stability of the spring 70 is good under the guidance of the positioning post 131, and the locking block 60 does not deviate from the axis of the spring 70 too much, which results in poor return movement effect.

As shown in fig. 7, the lock block 60 is provided with the mounting hole 62, and the spring 70 is provided such that one end is accommodated in the mounting hole 62 and the other end is abutted against the grip 10, and the spring 70 is mounted between the lock block 60 and the grip 10 with good stability.

Locking piece 60 may be restrained within mounting slot 13 by a retaining structure to prevent locking piece 60 from being forced out of grip 10 by spring 70. For example, as shown in fig. 5 and 7, notches 63 are formed on both sides of the locking block 60, a pin hole 15 is formed in the grip 10, and when the locking block 60 is provided with the mounting groove 13, a pin 80 inserted through the pin hole 15 is inserted into the notch 63 to restrict the locking block 60 from falling off the grip 10 by the pin 80.

It should be noted that the length of the notch 63 in the direction of the telescopic movement of the locking block 60 relative to the grip 10 is greater than the size of the pin 80, so that the locking block 60 can still selectively lock or release the relative position of the guide portion F and the grip 10 by moving relative to the grip 10 in the first position and the second position under the limit of the pin 80.

Referring to fig. 6 and 7, a plurality of engaging grooves 103 are formed on the guiding portion F, the engaging grooves 103 are arranged at intervals along the length direction of the guiding portion F, engaging protrusions 64 are formed on the locking block 60, and the engaging protrusions 64 form the boundary of the second insertion hole 61.

Referring to fig. 8 and 9, when the locking block 60 is located at the first position, the locking protrusion 64 can be locked with the locking groove 103, and the locking block 60 limits the guiding portion F to move along the length direction thereof relative to the grip 10, so that the guide 100 can maintain the installation distance between the grip 10 and the sleeve 30 after the guide 100 is connected with the sleeve 30.

In this embodiment, when the locking block 60 is pressed, the locking block 60 compresses the spring 70 and moves to the second position, and at this time, the locking protrusion 64 moves out of the locking groove 103 (i.e. the guiding portion F is aligned with the second insertion hole 61 again), and then the limiting of the guiding portion F is released, so that the guiding portion F can move relative to the holder 10, and the installation positions of the guiding member 100 and the holder 10 can be adjusted, and in this way, the installation position of the sleeve 30 relative to the holder 10 can be adjusted, and the filing thickness of the acetabular bone by the filing head 50 can be controlled.

The position of the locking protrusion 64 in the locking block 60 may be opposite to the edge of the first insertion hole 14 (i.e. in the second position, the boundary between the locking protrusion 64 and the second insertion hole 61 is exactly aligned with the edge of the first insertion hole 14), or may be arranged at other positions of the locking block 60 (e.g. the second insertion hole 61 is slightly larger than the first insertion hole 14, or the locking block 60 is at least partially staggered with the first insertion hole 14 in the hole axis direction with the first insertion hole 14), as long as the position can meet the requirement of matching with the clamping groove 103 to realize the limit of the guide part F, and when the locking block 60 is located at the second position, the locking protrusion 64 is moved out of the clamping groove 103 to release the limit of the guide part F.

The guide part F is provided with scales 104 which correspond to the clamping grooves 103 one by one, the scales 104 can mark numerical values representing distances or not, and only the distance between the adjacent scales 104 is used as a standard length, so that the matching position of the guide part F relative to the holding part 10 can be quantitatively adjusted. ,

in this embodiment, when the locking protrusion 64 is locked with the locking groove 103, the installation position of the guiding portion F relative to the grip 10 can be quickly determined according to the scale 104 corresponding to the locking groove 103, so as to provide a basis for adjusting the installation distance between the grip 10 and the sleeve 30, and finally the sleeve 30 and the grip 10 are maintained at a proper distance under the connection of the guide 100, and at this time, when the connecting shaft 40 drives the rasp head 50 to rotate around the axis of the sleeve 30, rasping can be performed at a proper position away from the positioning member 20. By adjusting the installation position of the guiding part F relative to the holding part 10, the filing thickness of the acetabulum by the filing head 50 can be accurately controlled.

Example 2

Referring to fig. 10, the present invention provides another acetabular rasping device having a structure similar to that of the acetabular rasping device provided in example 1, and the difference of the acetabular rasping device provided in example 2 is the structure of the connection assembly between the holder and the sleeve 30.

In the acetabular rasping device provided in embodiment 2, the connection between the holding member 10 and the positioning member 20 and the connection between the connecting shaft 40 and the sleeve 30 are the same as those in embodiment 1, and are not described again.

To avoid confusion with the guide 100 of embodiment 1, the guide 200 of the connecting assembly of embodiment 2 is given a different reference numeral from the guide 100 of the connecting assembly of embodiment 1.

As shown in fig. 11 and 12 in conjunction with fig. 11, the structure of the guide 200 of the connection assembly is different from that of the guide 100 of embodiment 1, and specifically, the guide 200 of embodiment 2 is not provided with the guide portion F movably connected to the grip 10, but detachably connected to the grip 10 by a snap-fit manner.

Specifically, guide 200 is equipped with buckle portion K, the card slot T has been seted up to gripping member 10, buckle portion K and card slot T phase-match, thereby when connecting buckle portion K and card slot T buckle, just form stable connection between guide 200 and the gripping member 10, at this moment, be connected sleeve 30 and guide 200, it is fixed each other with sleeve 30 just to have realized gripping member 10, thereby when connecting axle 40 drives filing head 50 and rotates around the axis of sleeve 30, the operator grips gripping member 10 tightly, just can ensure the stability of rasping, in order to ensure the rasping precision.

In other embodiments, the fastening portion K may be disposed on the grip 10, and the engaging groove T is disposed on the guide 200, so that the stable connection between the guide 200 and the grip 10 can be achieved by the fastening fit between the fastening portion K and the engaging groove T.

It should be noted that the connection structure of the guide 200 and the sleeve 30 is the same as that in embodiment 1, that is, when the sleeve 30 is connected to the guide 200, the radial limit and the guide 200 of the sleeve 30 can only move relative to the guide 200 in the axial direction, specifically, reference may be made to the connection structure of the guide 200 and the sleeve 30 in embodiment 1, for example, as shown in fig. 10 and 11, when the guide 200 in embodiment 2 adopts the same nip portion C as that of the guide 200 in embodiment 1, the structure of the nip portion C and the connection manner of the nip portion C and the sleeve 30 are the same as those in embodiment 1, and no further description is given here.

In this embodiment 2, since the guiding member 200 is connected with the sleeve 30 by a snap fit, the guiding member 200 with different lengths can be configured, so that the installation distance of the sleeve 30 relative to the holding member 10 can meet the requirement of the rasp head 50 for the thickness of the rasp of the acetabulum.

For example, the connecting assembly includes a plurality of guiding members 200, the lengths of the guiding members 200 are different, so that when the guiding members 200 with different lengths are selected to be connected between the grip member 10 and the sleeve 30, the installation distance of the sleeve 30 relative to the grip member 10 is different, and then the connecting shaft 40 passing through the sleeve 30 drives the rasp head 50 to rasp at a proper position away from the grip member 10, and since the positioning member 20 connected with the grip member 10 is attached to the acetabulum, the rasp thickness of the rasp head 50 to the acetabulum can be adjusted by adopting the guiding members 200 with different lengths in this embodiment 2. Furthermore, the plurality of guide members 200 can be made into standard members with corresponding specifications according to different lengths, so that the guide members 200 with proper lengths can be quickly selected according to the requirements of the file thickness.

It should be noted that the lengths of the plurality of guide members 200 are different, which means that the lengths of the different guide members 200 in the direction affecting the installation distance of the sleeve 30 relative to the grip 10 are different under the same measurement standard.

For the convenience of understanding, the following description will be made only by taking the distance between two measuring positions of the guide 200 in the direction perpendicular to the grip 10 as the length of the guide 200 when the guide 200 is mounted on the grip 10, and the effect of using the guide 200 with different lengths on adjusting the filing thickness of the file head 50 on the acetabulum will be further described.

Referring to fig. 11, a point C1 on the contour of the jaw part C closest to the surface 201 of the guide 200 facing away from the opening direction of the jaw part C is selected as a first measurement position, and a surface 201 of the guide 200 facing away from the opening direction of the jaw part C is selected as a second measurement position, so that the perpendicular distance from the first measurement position to the second measurement position (i.e., the distance from the point C1 to the surface 201) is the length L of the guide 200, and therefore, when the length L of the guide 200 connected between the sleeve 30 and the grip 10 is different, the installation distance of the sleeve 30 to the grip 10 is different, and then the relative distances between the rasp head 50 and the positioning member 20 are different, so that when the positioning member 20 is positioned in close contact with the acetabulum, the rasp 50 has different rasp thicknesses to the acetabulum.

In the acetabular rasping operation using the acetabular rasping device provided in embodiment 2, the hand-held grip 10 places the positioning member 20 into the acetabulum to be rasped, and the positioning member 20 is positioned in conformity with the acetabulum. The guide 200 of the appropriate length L is selected by determining the size of the acetabulum. The locking part K of the guide 200 is engaged with the locking groove T of the grip 10, so that the guide 200 and the grip 10 are stably connected. The sleeve 30 is engaged with the guiding member 200, so that the rasp head 50 rasps the acetabulum under the driving of the connecting shaft 40 by driving the connecting shaft 40 to rotate relative to the sleeve 30. In this embodiment 2, if the rasp head 50 is found to have a lesser amount of rasping of the acetabulum, the guide 200 of greater length L can be replaced so that the distance between the sleeve 30 and the grip 10 is increased to increase the rasp thickness of the rasp head 50 to the acetabulum.

When the catching portion K is engaged with the catching groove T, the guide 200 is axially restrained to the grip 10, so that the guide 200 cannot be separated from the grip 10. The guide part 200 is circumferentially limited on the holding part 10, so that the guide part 200 cannot rotate relative to the holding part 10, the positioning effect of the holding part 10 on the sleeve 30 is improved, and when the connecting shaft 40 rotates relative to the sleeve 30, the sleeve 30 cannot randomly shake to influence the filing precision.

As shown in fig. 12 to 14, the latch portion K includes a boss 202 and a guide post 203 connected to each other. The engaging groove T includes a first groove 10a and a second groove 10b communicating with each other. When the locking portion K is engaged with the locking groove T, the boss 202 is limited to the first groove 10a in the circumferential direction of the guide 200, so as to prevent the guide 200 from rotating relative to the grip 10 and affecting the positioning effect of the grip 10 on the sleeve 30.

The cross-sectional shape of the first groove 10a may be square, triangular or quadrangular, as long as the cross-sectional shape of the first groove 10a is not circular, so that the boss 202 engaged with the first groove 10a cannot rotate relative to the grip 10 around the axial direction of the guide member 200, i.e., the boss 202 is located at the first groove 10a in the circumferential direction of the guide member 200.

In this embodiment, as shown in fig. 12 and 14, when the locking portion K is engaged with the locking groove T, the guide post 203 is restricted in the second groove 10b along the axial direction of the guide 200. The guide column 203 is provided with a slot 204 on the periphery, and the plunger 10c is protruded on the inner wall of the second slot 10 b. When the buckling part K is engaged with the engaging groove T, the plunger 10c is engaged with the insertion groove 204, so that the plunger restricts the guide post 203 from being pulled out of the insertion groove 204, and stable connection between the guide member 200 and the grip member 10 is realized.

The slot 204 may be an annular slot or a slot with other shapes as long as the plunger 10c can be inserted and matched to limit the guide pillar.

Example 3

Referring to fig. 15, the present invention provides still another acetabular rasping device having a structure similar to that of the acetabular rasping device provided in embodiment 2, and the acetabular rasping device provided in embodiment 3 is different in the structure of the connection assembly between the grip 10 and the sleeve 30.

Specifically, in the acetabular rasping device of embodiment 3, the connecting assembly includes the guide member 200 and the connecting block 300, wherein the structure of the guide member 200 and the connecting structure of the guide member 200 and the sleeve 30 are the same as those in embodiment 2, and are not described herein again.

In embodiment 3, the guide member 200 and the grip member 10 are connected by the connecting blocks 300, the number of the connecting blocks 300 may be 1, or may be plural, for example, the connecting assembly includes 2 or more than 2 connecting blocks 300.

As shown in fig. 16 and 17, the connecting block 300 has a first connecting portion 310 at one end and a second connecting portion 320 at the other end. The structures of the first connecting portion 310 and the locking portion K are the same, the structure of the second connecting portion 320 and the locking groove T are the same, and the structures of the first connecting portion 310 and the second connecting portion 320 may specifically refer to the locking portion K of the guide 200 and the locking groove T of the holding element 10 in embodiment 2, which is not described herein again.

Since the fastening portion K and the fastening groove T are matched, the first connecting portion 310 and the second connecting portion 320 are also matched, that is, 2 or 2 connecting blocks 300 can be connected together through the first connecting portion 310 and the second connecting portion 320.

In the connecting block 300 of embodiment 3, since the first connecting portion 310 and the locking portion K have the same structure, the second connecting portion 320 and the locking groove T have the same structure, and the locking portion K and the locking groove T are matched, the first connecting portion 310 can be matched with the locking groove T, and the second connecting portion 320 can be matched with the locking portion K. As shown in fig. 18, the combination of the connecting block 300 and the guide member 200 allows the overall length of the obtained connecting assembly to be adjusted, so as to adjust the installation distance of the sleeve 30 relative to the grip member 10. At this moment, when the connecting shaft 40 arranged in the sleeve 30 drives the file head 50 to rotate, the acetabular bone defect can be precisely filed, the thickness of the filed is proper, so that the filed amount is reduced as much as possible, more bone amount is reserved, and the recovery effect of bone tissues is improved.

In the embodiment where the connection assembly includes a plurality of connection blocks 300, the plurality of connection blocks 300 may be the same size or different sizes. Wherein, the connecting blocks 300 with the same size can be connected in series through the connecting blocks 300 with different numbers, so as to adjust the installation distance of the connecting component to the sleeve 30 relative to the holding part 10, thereby the file thickness of the file head 50 to the acetabulum can be flexibly adjusted according to the defect degree of the acetabulum. When the sizes of the connecting blocks 300 are different, the connecting blocks 300 with proper lengths can be selected to be connected with the guide member 200 to adapt to the adjustment requirement of the thickness of the rasp. The length of the connecting block 300 refers to the length of the connecting block 300 in the direction affecting the installation distance of the sleeve 30 relative to the holding member 10 when the connecting block 300 is installed between the guide member 200 and the holding member 10, that is, when connecting blocks 300 with different lengths are selected to be connected between the guide member 200 and the holding member 10, the installation distance of the sleeve 30 relative to the holding member 10 is different, so that when the holding member 10 is gripped to make the positioning member 20 connected with the holding member 10 fit with the acetabulum for positioning, the sleeve 30 can play a good guiding effect on the connecting shaft 40 at different positions from the positioning member 20, so that the rasp head 50 connected with the connecting shaft 40 can be suitable for the thickness of the acetabular rasp.

Example 4

Referring to fig. 19, the acetabular rasping device according to example 4 is different from those according to examples 2 and 3 in that the structure of the holder 10 is different. Specifically, as shown in fig. 20 and 21, the grip 10 is provided with a plurality of engaging grooves T. The depths (H1, H2, H3) of a plurality of clamping grooves T are different, when the clamping part K is matched with the clamping grooves T with different depths, the length of the structure of the clamping part K extending into the clamping grooves T is different, then the clamping part K is inserted into the clamping grooves T with different depths, and different installation distances of the sleeve 30 relative to the holding part 10 can be obtained so as to meet the requirement that the rasp head 50 carries out rasping with different thicknesses on the acetabulum.

Due to the engagement between the locking portion K and the engagement groove T, a stable connection between the holder 10 and the connecting member such as the guide 200 or the connecting block 300 can be formed regardless of the installation positions of the locking portion K and the engagement groove T. Specifically, the engaging groove T may be disposed on the holding member 10, or may be disposed on a connecting member connected to the holding member 10, such as the guide member 200 or the connecting block 300, and as long as the fastening portion K and the engaging groove T are respectively disposed on the holding member 10 and the connecting member connected to the holding member 10, the holding member 10 and the connecting member such as the guide member 200 or the connecting block 300 can be stably connected through the cooperation between the fastening portion K and the engaging groove T. In other embodiments, the grip 10 is provided with a plurality of engaging portions K having different axial lengths, and when the engaging grooves T of the connecting member such as the guide 200 or the connecting block 300 are engaged with the different engaging portions K, the mounting distance of the sleeve 30 to the grip 10 is different.

It should be noted that the structure of the engaging groove T is the same as that of the engaging grooves T in embodiments 2 and 3, and details thereof are not repeated.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (13)

1. An acetabular rasping device comprising:

a grip;

the positioning part is connected with the holding part and is used for being attached to the acetabulum;

a sleeve having a shaft hole extending in an axial direction thereof;

the connecting shaft is in rotating fit with the shaft hole;

a file head, the connecting shafts being connected, an

The connecting assembly is used for connecting the sleeve and the holding piece, the connecting assembly comprises a guide piece detachably connected with the sleeve, when the sleeve is connected with the guide piece, the guide piece and the sleeve are mutually limited in the radial direction of the sleeve, and the sleeve can move relative to the guide piece in the axial direction of the sleeve.

2. The acetabular rasping device of claim 1, wherein the guide member has a jaw portion with opposing clamping arms, one of the clamping arms and the sleeve having a retaining rib and the other having a retaining groove, the retaining rib slidably engaging the retaining groove.

3. The acetabular rasping device of claim 1, wherein the guide member is provided with a guide portion that is movably coupled to the grip member to adjust a mounting distance of the sleeve to the grip member, and the coupling assembly includes a locking block that is coupled to the grip member and is configured to controllably lock or release a relative position of the guide member to the grip member.

4. The acetabular rasping device according to claim 3, wherein the holder defines a mounting groove and a first insertion hole, the locking block is mounted to the mounting groove, the locking block defines a second insertion hole, the guide portion is disposed through the first insertion hole and the second insertion hole, an elastic member is disposed between the locking block and the holder, the locking block moves from a first position to a second position when pressed, the locking block returns to the first position under the urging of the elastic member when the pressing of the locking block is released, the guide portion is retained by the locking block when the locking block is in the first position, and the guide portion can move along its length relative to the locking block when the locking block is in the second position.

5. The acetabular rasp device according to claim 4, wherein a plurality of locking grooves are formed in the guide portion, the locking grooves are spaced apart along a length of the guide portion, and a locking protrusion is formed on the locking block, the locking protrusion being capable of engaging with the locking groove when the locking block is in the first position and being removed from the locking groove when the locking block is in the second position.

6. The acetabular rasping device according to claim 1, wherein one of the guide member and the grip member is provided with a locking portion, and the other of the guide member and the grip member is provided with a locking groove, and the locking portion is matched with the locking groove.

7. The acetabular rasping device of claim 6, wherein the guide is axially retained to the grip and the guide is circumferentially retained to the grip when the snap fit portion and the snap fit groove are mated.

8. The acetabular rasping device according to claim 7, wherein the hooking portion includes a boss and a guide post connected to each other, the engaging groove includes a first groove and a second groove communicating with each other, the boss is limited to the first groove in a circumferential direction of the guide when the hooking portion is engaged with the engaging groove, and the guide post is limited to the second groove in an axial direction of the guide.

9. The acetabular rasping device according to claim 8, wherein a slot is formed around the guide post, and a plunger is protruded from an inner wall of the second groove, and the plunger is engaged with the slot when the locking portion is engaged with the engaging groove.

10. The acetabular rasping device of claim 6, wherein the connection assembly further comprises a connection block having a first connection portion at one end and a second connection portion at the other end, wherein the first connection portion is identical in structure to the snap portion and the second connection portion is identical in structure to the snap groove.

11. The acetabular rasping device of claim 10, wherein the connection assembly includes a plurality of the connection blocks.

12. The acetabular rasping device according to claim 6, wherein the gripping member defines a plurality of engaging grooves, the engaging grooves having different depths, and the engaging portions have different lengths extending into the engaging grooves when the engaging portions are engaged with the engaging grooves having different depths; or

The gripping piece is provided with a plurality of buckling parts, and the axial lengths of the buckling parts are different.

13. The acetabular rasp device of any of claims 6-12, wherein the connection assembly includes a plurality of guides, the plurality of guides being of different lengths.

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