CN113693795A

CN113693795A - Artificial limb disengaging device

Info

Publication number: CN113693795A
Application number: CN202111002460.4A
Authority: CN
Inventors: 杨勇
Original assignee: Beijing Jishuitan Hospital
Current assignee: Beijing Jishuitan Hospital
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2021-11-26
Anticipated expiration: 2041-08-30
Also published as: CN113693795B

Abstract

The invention provides a prosthetic detachment device, which relates to the technical field of prosthetic limbs and comprises: the push rod component comprises a push rod seat, a push rod seat and a push block component; the push rod seat is provided with the mounting hole, the push block component is arranged in the mounting hole, under normal conditions, the push block component in the mounting hole extends into the inclined plane groove in the push rod main body, the push rod seat and the push rod seat are relatively firm, the connection between the near end of the prosthesis and the far end of the prosthesis is stable, when the stress applied to the bone integration prosthesis by the prosthesis is larger than a set external force, the push block component is extruded out by the inclined plane groove, the push block component extends out of the inclined plane groove, the near end of the prosthesis is separated from the far end of the prosthesis, the stress at the far end of the bone integration prosthesis is not transferred to the near end any more, the joint of the bone integration prosthesis and the marrow cavity is prevented from being subjected to the external force exceeding the allowable external force, and the displacement and the separation of the bone integration prosthesis are prevented from occurring.

Description

Artificial limb disengaging device

Technical Field

The invention relates to the technical field of artificial limbs, in particular to an artificial limb separation device.

Background

Osseointegrated prostheses are one way of connecting a prosthesis to a limb. The osseointegrated prosthesis is divided into two parts, namely a proximal prosthesis end and a distal prosthesis end. The proximal part of the prosthesis is positioned in the body and is fixed in the medullary cavity of the diaphysis. The distal portion of the prosthesis is located outside the body and is connected to the limb prosthesis portion. The artificial limb matched with the osseointegration prosthesis is different from the traditional socket artificial limb, and the prosthesis is connected with the limb and the artificial limb in a plugging and unplugging mode. The osseointegrated prosthesis fundamentally solves the problems that the traditional prosthesis has poor air permeability and limited range of motion due to the poor environment of the socket-residual limb interface, the residual limb is infected due to friction, the residual limb is too short and the prosthesis cannot be installed, and the like.

The key technical problem of the osseointegrated prosthesis is how to prevent the prosthesis from shifting and falling out caused by external force at the joint of the proximal part of the osseointegrated prosthesis and the marrow cavity. The current osseointegrated prostheses are rigidly connected to the medullary cavity and are transferred directly to the medullary cavity through the osseointegrated prosthesis when the prosthesis is stressed. In force transmitting systems, the junction of the osseointegrated prosthesis with the medullary cavity is the weakest link.

However, when the prosthesis of the patient is subjected to excessive force, the stress at the junction of the osseointegrated prosthesis and the medullary cavity exceeds the strength of the bond therebetween, and displacement or expulsion of the osseointegrated prosthesis may occur. Once this occurs, a secondary operation is required and great pain is brought to the mind and body of the patient.

Disclosure of Invention

The invention aims to provide a prosthesis detachment device, which solves the technical problem that when a patient prosthesis is subjected to excessive force, the stress at the joint of an osseointegrated prosthesis and a marrow cavity exceeds the bonding strength between the osseointegrated prosthesis and the marrow cavity, and the osseointegrated prosthesis is displaced or falls out in the prior art.

In a first aspect, the present invention provides a prosthesis detachment device comprising: the push rod component comprises a push rod seat, a push rod seat and a push block component;

the ejector rod seat is used for being installed in the prosthesis near-end, the ejector rod seat is used for being installed in the prosthesis far-end, the prosthesis near-end with the connection can be dismantled to the prosthesis far-end, the ejector rod seat has the mounting hole, the ejector block component set up in the mounting hole, the ejector rod seat is close to the one end of ejector rod seat has the ejector rod main part, the ejector rod main part stretches into in the ejector rod seat, just the ejector rod main part has the inclined plane recess, the ejector block component configuration is to stretch into in the inclined plane recess, with the ejector rod main part is fixed in the ejector rod seat.

In an alternative embodiment of the method of the present invention,

the prosthesis detachment device further comprises a spring member and a set screw;

the spring component and the fixing screw are arranged in the mounting hole, the fixing screw can be connected with the hole wall of the mounting hole, one end of the spring component is connected with the push block component, the other end of the spring component is connected with the fixing screw, and the spring component is configured to enable the push block component to have a movement trend of extending into the inclined plane groove.

In an alternative embodiment of the method of the present invention,

the prosthesis disengagement device further comprises a first fixing bolt;

the push rod seat is provided with a first connecting hole, and the first fixing bolt penetrates through the first connecting hole to be connected with the near end of the prosthesis.

In an alternative embodiment of the method of the present invention,

the push rod seat is provided with a center hole, and the push rod main body penetrates through the center hole and extends into the push rod seat.

In an alternative embodiment of the method of the present invention,

the prosthesis disengagement device further comprises a second fixing bolt;

the ejector rod seat is provided with a second connecting hole, and the second fixing bolt penetrates through the second connecting hole to be connected with the far end of the prosthesis.

In an alternative embodiment of the method of the present invention,

the prosthesis detachment device further includes an anti-drop member;

the anti-falling component is connected with one end of the ejector rod main body, which is far away from the ejector rod seat, and the anti-falling component is configured to limit the moving range of the ejector rod main body.

In an alternative embodiment of the method of the present invention,

the anti-falling component comprises a baffle plate;

the ejector rod main body penetrates through the central hole to be connected with the blocking piece, a through hole is formed in the near end of the prosthesis, and the blocking piece can slide in the through hole.

In an alternative embodiment of the method of the present invention,

the outer diameter of the baffle plate is larger than the inner diameter of the central hole.

In an alternative embodiment of the method of the present invention,

the anti-drop component also comprises an anti-drop screw;

the anti-falling screw penetrates through the separation blade and is connected with the ejector rod main body.

In an alternative embodiment of the method of the present invention,

the prosthesis near-end is provided with the connection arch, the prosthesis distal end is provided with the spread groove, the connection arch can stretch into in the spread groove.

The invention provides a prosthesis detachment device, comprising: the push rod component comprises a push rod seat, a push rod seat and a push block component; the push rod seat is used for being installed in the false body near-end, and the ejector pin seat is used for being installed in the false body distal end, and the false body near-end can be dismantled with the false body distal end and be connected, and the push rod seat has the mounting hole, and the ejector block component sets up in the mounting hole, and the one end that the ejector pin seat is close to the push rod seat has the ejector pin main part, and the ejector pin main part stretches into in the push rod seat, and the ejector pin main part has the inclined plane recess, and the ejector block component configuration is arranged to stretch into in the inclined plane recess to fix the ejector pin main part in the push rod seat. The push rod seat is provided with the mounting hole, the push block component is arranged in the mounting hole, under normal conditions, the push block component in the mounting hole extends into the inclined plane groove on the push rod main body, the push rod seat and the push rod seat are relatively firm, the connection between the near end of the prosthesis and the far end of the prosthesis is stable, when the stress applied to the bone integration prosthesis by the prosthesis is larger than a set external force, the push block component is extruded out by the inclined plane groove, the push block component extends out of the inclined plane groove, the near end of the prosthesis is separated from the far end of the prosthesis, the stress at the far end of the bone integration prosthesis is not transferred to the near end, further the joint of the bone integration prosthesis and the marrow cavity is prevented from being subjected to the external force exceeding the allowable external force, the displacement and the separation of the bone integration prosthesis are avoided, the problem that when the prosthesis of a patient bears the excessive force in the prior art is solved, the stress at the joint of the bone integration prosthesis and the marrow cavity exceeds the bonding strength between the bone integration and the marrow cavity, technical problems of displacement or expulsion of the osseointegrated prosthesis can arise.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the overall structure of a prosthesis detachment apparatus according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the prosthesis release device in a locked state according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of the prosthesis detachment apparatus according to an embodiment of the present invention in an unlocked state.

Icon: 100-a pushrod seat; 110-a first connection hole; 120-a central aperture; 130-mounting holes; 200-a jack-post seat; 210-a ram body; 211-bevel groove; 220-second connection hole; 300-a pusher member; 310-a spring member; 320-a set screw; 400-a first fixing bolt; 500-a second fixing bolt; 600-a run-off prevention member; 610-a baffle plate; 620-anti-drop screw; 700-a proximal prosthesis end; 710-a connecting projection; 720-through holes; 800-a prosthesis distal end; 810-connecting groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

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

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

As shown in fig. 1, the prosthesis detachment apparatus according to the present embodiment includes: a push rod base 100, a push rod base 200 and a push block member 300; the push rod seat 100 is used for being installed in the prosthesis near end 700, the ejector rod seat 200 is used for being installed in the prosthesis far end 800, the prosthesis near end 700 is detachably connected with the prosthesis far end 800, the push rod seat 100 is provided with an installation hole 130, the push block member 300 is arranged in the installation hole 130, one end, close to the push rod seat 100, of the ejector rod seat 200 is provided with an ejector rod main body 210, the ejector rod main body 210 extends into the push rod seat 100, the ejector rod main body 210 is provided with a slope groove 211, and the push block member 300 is configured to extend into the slope groove 211 so as to fix the ejector rod main body 210 in the push rod seat 100.

Specifically, the push rod seat 100 is installed in the proximal end 700 of the prosthesis, a mounting hole 130 is formed along the radial direction of the push rod seat 100, the push block member 300 is located in the mounting hole 130, and the push block member 300 can slide in the mounting hole 130, the ejector rod seat 200 is arranged in the far end 800 of the prosthesis, the ejector rod body 210 is arranged on the ejector rod seat 200, the ejector rod body 210 penetrates through the ejector rod seat 100 to extend into the near end 700 of the prosthesis, under the normal use condition of the prosthesis, the pusher member 300 end surface extends into the beveled recess 211 on the ejector pin body 210, the ejector pin body 210 is subjected to a restraining force, the prosthesis proximal end 700 is connected to the prosthesis distal end 800, when the osseointegrated prosthesis is subjected to an external force exceeding an allowable value, the push block member 300 is disengaged from the inclined plane groove 211, the ejector rod main body 210 moves towards the direction far away from the proximal end 700 of the prosthesis, and the proximal end 700 of the prosthesis and the distal end 800 of the prosthesis slide relatively to each other, so that the displacement and the disengagement of the osseointegrated prosthesis are avoided.

The prosthesis disengagement apparatus provided in this embodiment includes: a push rod base 100, a push rod base 200 and a push block member 300; by arranging the mounting hole 130 on the push rod seat 100 and arranging the push block member 300 in the mounting hole 130, under normal conditions, the push block member 300 in the mounting hole 130 extends into the inclined plane groove 211 on the ejector rod main body 210, the ejector rod seat 200 and the push rod seat 100 are relatively firm, the connection between the proximal end 700 of the prosthesis and the distal end 800 of the prosthesis is stable, when the stress applied to the bone integration prosthesis by the prosthesis is greater than a set external force, the push block member 300 is extruded out by the inclined plane groove 211, the push block member 300 extends out from the inclined plane groove 211, the proximal end 700 of the prosthesis is separated from the distal end 800 of the prosthesis, the stress of the distal end 800 of the bone integration prosthesis is not transmitted to the proximal end any more, further, the joint of the bone integration prosthesis and the medullary cavity is prevented from being subjected to an external force exceeding allowable external force, the displacement and the escape of the bone integration prosthesis are avoided, the stress of the joint of the bone integration prosthesis and the medullary cavity in the prior art is relieved when the prosthesis of a patient is subjected to excessive force, technical problems of displacement or expulsion of the osseointegrated prosthesis can arise.

On the basis of the above embodiments, as shown in fig. 2 and 3, in an alternative embodiment, the prosthesis detachment apparatus provided by the present embodiment further includes a spring member 310 and a fixing screw 320; the spring member 310 and the fixing screw 320 are both arranged in the mounting hole 130, the fixing screw 320 can be connected with the hole wall of the mounting hole 130, one end of the spring member 310 is connected with the push block member 300, the other end of the spring member 310 is connected with the fixing screw 320, and the spring member 310 is configured to enable the push block member 300 to have a movement tendency of extending into the inclined plane groove 211.

Specifically, the spring member 310 is disposed between the set screw 320 and the pusher member 300, the spring member 310 is specifically configured as a compression spring, the disposition of the spring member 310 causes the pusher member 300 to compress in the ramped recess 211, increasing the threshold of the disengagement force of the distal prosthesis end 800 from the proximal prosthesis end 700, and the disposition of the spring member 310 enables the pusher member 300 to naturally extend into the ramped recess 211, completing the lock between the proximal prosthesis end 700 and the distal prosthesis end 800.

In an alternative embodiment, the prosthesis detachment device further comprises a first fixing bolt 400; the pusher block 100 is provided with a first coupling hole 110, and the first fixing bolt 400 is coupled to the proximal prosthesis end 700 through the first coupling hole 110.

Specifically, the first connection hole 110 is formed in the plunger seat 100, a plurality of first connection holes 110 and a plurality of first fixing bolts 400 are correspondingly formed, and the first fixing bolts 400 penetrate through the first connection holes 110 and extend into the proximal prosthesis end 700 to fix the plunger seat 100 to the proximal prosthesis end 700.

In an alternative embodiment, the tappet seat 100 is provided with a central hole 120, and the tappet body 210 protrudes into the tappet seat 100 through the central hole 120.

Specifically, a central hole 120 is formed in an axial position of the push rod seat 100, and the push rod main body 210 penetrates through the central hole 120, extends into the push rod seat 100, and penetrates out of the push rod seat 100.

In an alternative embodiment, the prosthesis detachment device further comprises a second fixing bolt 500; the ejector rod seat 200 is provided with a second coupling hole 220, and the second fixing bolt 500 is coupled to the distal end 800 of the prosthesis through the second coupling hole 220.

Specifically, a second connecting hole 220 is formed in the ejector rod seat 200, a plurality of second connecting holes 220 and a plurality of second fixing bolts 500 are correspondingly arranged on each of the second connecting holes 220, and the second fixing bolts 500 penetrate through the second connecting holes 220 and extend into the prosthesis far end 800 to fix the ejector rod seat 200 on the prosthesis near end 700.

The prosthesis detachment apparatus according to the present embodiment is configured to fix the pusher shoe 100 and the ejector shoe 200 to the proximal prosthesis end 700 and the distal prosthesis end 800, respectively, by the arrangement of the first fixing bolt 400 and the second fixing bolt 500.

On the basis of the above embodiments, in an alternative embodiment, the prosthesis detachment apparatus provided by the present embodiment further includes a retaining member 600; the retaining member 600 is connected to an end of the jack main body 210 away from the jack base 200, and the retaining member 600 is configured to be able to limit the moving range of the jack main body 210.

Specifically, the anti-slip member 600 is disposed at an end of the push rod main body 210 penetrating through the push rod seat 100 and extending into the proximal end 700 of the prosthesis, when the osseointegrated prosthesis is subjected to an external force exceeding an allowable value, two parts of the distal end 800 of the osseointegrated prosthesis slide relative to each other, and the anti-slip member 600 prevents the push rod main body 210 from coming out of the central hole 120 of the push rod seat 100, so that the push rod main body 210 is always limited in the central hole 120.

In an alternative embodiment, the anti-drop member 600 includes a flap 610; the mandrel body 210 passes through the central hole 120 and is connected with the stop piece 610, the proximal end 700 of the prosthesis is provided with a through hole 720, and the stop piece 610 can slide in the through hole 720.

Specifically, the stopper 610 is located in the through hole 720 of the proximal end 700 of the prosthesis, the stopper 610 is connected with the end of the ejector rod main body 210 penetrating through the central hole 120, and the stopper 610 can abut against the push rod seat 100 to limit the sliding range of the ejector rod main body 210, thereby preventing the distal end 800 of the prosthesis from being pulled out of the proximal end 700 of the prosthesis.

In an alternative embodiment, the outer diameter dimension of the flap 610 is greater than the inner diameter dimension of the central bore 120.

Specifically, the outer diameter of the blocking piece 610 is smaller than the inner diameter of the through hole 720, so that the blocking piece 610 can slide in the through hole 720, the outer diameter of the blocking piece 610 is larger than the inner diameter of the central hole 120, and the blocking piece 610 can abut against the push rod seat 100.

In an alternative embodiment, the anti-slip member 600 further comprises an anti-slip screw 620; the anti-slip screw 620 passes through the stopper 610 and is connected to the carrier rod body 210.

Specifically, the retaining screw 620 extends into the stem body 210 through the stopper piece 610, and fixes the stopper piece 610 to the end of the stem body 210.

In an alternative embodiment, the proximal prosthesis end 700 is provided with an attachment protrusion 710, the distal prosthesis end 800 is provided with an attachment slot 810, and the attachment protrusion 710 is capable of extending into the attachment slot 810.

Specifically, an attachment protrusion 710 is disposed on a side of the proximal prosthesis end 700 adjacent to the distal prosthesis end 800, an attachment groove 810 is disposed on a side of the distal prosthesis end 800 adjacent to the proximal prosthesis end 700, and the attachment protrusion 710 normally extends into the attachment groove 810 to complete the attachment of the proximal prosthesis end 700 to the distal prosthesis end 800.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prosthesis detachment device, comprising: a push rod seat (100), a push rod seat (200) and a push block component (300);

the ejector rod seat (100) is used for being installed in a prosthesis near end (700), the ejector rod seat (200) is used for being installed in a prosthesis far end (800), the prosthesis near end (700) is detachably connected with the prosthesis far end (800), the ejector rod seat (100) is provided with an installation hole (130), the ejector block member (300) is arranged in the installation hole (130), one end, close to the ejector rod seat (100), of the ejector rod seat (200) is provided with an ejector rod main body (210), the ejector rod main body (210) extends into the ejector rod seat (100), the ejector rod main body (210) is provided with a slope groove (211), and the ejector block member (300) is configured to be capable of extending into the slope groove (211) so as to fix the ejector rod main body (210) in the ejector rod seat (100).

2. A prosthetic detachment device according to claim 1,

the prosthesis detachment device further includes a spring member (310) and a set screw (320);

the spring member (310) and the fixing screw (320) are arranged in the mounting hole (130), the fixing screw (320) can be connected with the hole wall of the mounting hole (130), one end of the spring member (310) is connected with the push block member (300), the other end of the spring member (310) is connected with the fixing screw (320), and the spring member (310) is configured to enable the push block member (300) to have a movement tendency of extending into the inclined plane groove (211).

3. A prosthetic detachment device according to claim 2,

the prosthesis detachment device further comprises a first fixing bolt (400);

the push rod seat (100) is provided with a first connection hole (110), and the first fixing bolt (400) passes through the first connection hole (110) to be connected with the proximal end (700) of the prosthesis.

4. A prosthetic detachment device according to claim 3,

the push rod base (100) is provided with a center hole (120), and the push rod main body (210) penetrates through the center hole (120) and extends into the push rod base (100).

5. A prosthetic detachment device according to claim 1,

the prosthesis detachment device further comprises a second fixing bolt (500);

the ejector rod seat (200) is provided with a second connecting hole (220), and the second fixing bolt (500) penetrates through the second connecting hole (220) to be connected with the far end (800) of the prosthesis.

6. A prosthetic detachment device according to claim 4,

the prosthesis detachment device further includes a drop-off prevention member (600);

the anti-drop component (600) is connected with one end of the ejector rod main body (210) far away from the ejector rod seat (200), and the anti-drop component (600) is configured to limit the moving range of the ejector rod main body (210).

7. A prosthetic detachment device according to claim 6,

the anti-drop member (600) includes a stopper piece (610);

the ejector rod main body (210) penetrates through the central hole (120) to be connected with the baffle (610), a through hole (720) is formed in the prosthesis proximal end (700), and the baffle (610) can slide in the through hole (720).

8. A prosthetic detachment device according to claim 7,

the outer diameter of the baffle plate (610) is larger than the inner diameter of the central hole (120).

9. A prosthetic detachment device according to claim 7,

the anti-drop member (600) further comprises an anti-drop screw (620);

the anti-falling screw (620) penetrates through the baffle sheet (610) to be connected with the ejector rod main body (210).

10. A prosthetic detachment device according to any of claims 1-9,

the proximal end (700) of the prosthesis is provided with a connecting projection (710), the distal end (800) of the prosthesis is provided with a connecting groove (810), and the connecting projection (710) can extend into the connecting groove (810).