CN111166453A

CN111166453A - Closed locking device

Info

Publication number: CN111166453A
Application number: CN201911370209.6A
Authority: CN
Inventors: 赵国军; 李新阳; 张庆杰
Original assignee: Tianjin Walkman Biomaterial Co ltd
Current assignee: Tianjin Walkman Biomaterial Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-05-19

Abstract

The embodiment of the invention relates to a closed locking device, which comprises: the special-shaped block, the connecting rod, the fixing block, the locking screw and the end fixing block; the dysmorphism piece includes: a first fixing part and a second fixing part; the first fixing part and the second fixing part are connected and integrally formed; the connecting rod includes in order: the first rod body, the second rod body and the third rod body; the first rod body, the second rod body and the third rod body are integrally arranged; the fixed block includes: the fixing block is inserted into the second rod body of the connecting rod by utilizing the connecting rod through hole; the locking screw includes: a screw cap, an upper screw joint part, a lower screw joint part and a nail head; the end fixed block includes: a fixing hole and a connecting rod insertion hole; the fixing hole is arranged in the end fixing block, and the connecting rod insertion hole is arranged on the side surface of the end fixing block; the third body of rod of connecting rod inserts in the connecting rod jack.

Description

Closed locking device

Technical Field

The invention relates to the field of orthopedic medical instruments, in particular to a closed locking device.

Background

In general, when a fracture occurs, a suitable treatment is given according to the bone structure of the injured part, and when the fracture is located near a joint, it is not suitable for fixation using plaster, and a bone plate and a bone nail are generally used as fixtures for treating the fracture.

The fixing device has the problems of stress shielding, stress concentration and stress shielding in the process of being particularly applied to fracture fixation. External bone anchors often fail to serve as a final locking device due to post-operative infection. In addition, in the existing instruments using the connecting rod and the clamping block as the connecting and locking device, the clamping block and the connecting rod slide and rotate during the operation, which seriously affects the operation, and the bone is not healed or malformed after the operation because of the rod falling and sliding caused by the poor locking. Therefore, the traditional fracture locking device has the defects of inconvenient selection and use, inflexible use, high manufacturing cost and poor clinical curative effect, and needs to be further improved.

Disclosure of Invention

The invention aims to provide a closed locking device which is simple in design structure, easy and convenient to assemble, flexible to use, good in adaptability, strong in expansibility and low in manufacturing cost.

To achieve the above object, the present invention provides a closed type locking device, comprising: the special-shaped block, the connecting rod, the fixing block, the locking screw and the end fixing block;

the special-shaped block comprises: a first fixing part and a second fixing part; the first fixing part and the second fixing part are connected and integrally formed;

at least one fixing screw hole and two connecting rod connecting screw holes are formed in the second fixing part;

the connecting rod includes in order: the first rod body, the second rod body and the third rod body; the first rod body, the second rod body and the third rod body are integrally arranged;

the first rod body of the connecting rod is inserted into the connecting screw hole of the connecting rod;

the fixed block includes: the fixing block is inserted into the second rod body of the connecting rod by utilizing the connecting rod through hole;

the locking screw includes: a screw cap, an upper screw joint part, a lower screw joint part and a nail head; the upper screw joint part is connected with the screw cap, the lower screw joint part is connected with the upper screw joint part, and the screw head is connected with the lower screw joint part;

the locking screw penetrates through a fixing screw hole of the special-shaped block, the upper screwed part is screwed with the fixing screw hole, and the screw cap abuts against the fixing screw hole so as to extrude the connecting rod connecting screw hole and tightly connect a first rod body of the connecting rod inserted in the connecting rod connecting screw hole with the connecting rod connecting screw hole;

the end fixed block includes: a fixing hole and a connecting rod insertion hole;

the fixing hole is arranged in the end fixing block, and the connecting rod insertion hole is arranged on the side surface of the end fixing block;

a third rod body of the connecting rod is inserted into the connecting rod jack;

the locking screw penetrates through the fixing hole of the end fixing block, the upper screwed part is screwed with the fixing hole, and the screw cap abuts against the fixing hole so as to extrude the connecting rod jack and tightly connect the third rod body of the connecting rod inserted in the connecting rod jack with the connecting rod jack.

Preferably, at least one pressurizing screw hole, an inclined-insertion pressurizing screw hole and a positioning hole are formed in the first fixing portion.

Preferably, the fixing screw holes specifically include: an upper fixing screw hole and a lower fixing screw hole;

the upper fixing screw hole is positioned on the upper surface of the second fixing part, and the wall of the upper fixing screw hole is a smooth curved surface and is used for abutting against the screw cap of the locking screw;

the lower fixing screw hole is positioned on the lower surface of the second fixing part, and a hole wall of the lower fixing screw hole is provided with a fastening thread for being in threaded connection with an upper threaded part of the locking screw; the aperture of the upper fixing screw hole is larger than that of the lower fixing screw hole.

Preferably, the connecting rod connecting screw holes are located on the side face of the second fixing portion, and the two connecting rod connecting screw holes are symmetrically or asymmetrically arranged on two sides of the fixing screw holes.

Preferably, the connecting rod further comprises a groove;

the grooves are arranged on the surface of the connecting rod at equal intervals, the interval between every two adjacent grooves is 0.35-0.4 mm, and the distance between the central lines of the two adjacent grooves is 1.14-1.57 mm.

Preferably, the fixing block further includes: an upper edge portion and a lower edge portion;

the upper edge part is positioned at the upper end of the fixed block and comprises an upper fixed screw hole;

the lower edge portion is located at the lower end of the fixing block and comprises a lower fixing threaded hole.

Further preferably, a side opening is opened between the upper edge portion and the lower edge portion, and a gap of the side opening is adjusted by the locking screw.

Preferably, the fixing hole specifically includes: an upper fixing hole and a lower fixing hole;

the upper fixing hole is positioned on the upper surface of the end fixing block, and the hole wall of the upper fixing hole is a smooth curved surface and is used for abutting against a screw cap of the locking screw;

the lower fixing hole is located on the lower surface of the end fixing block, and fastening threads are arranged on the hole wall of the lower fixing hole and used for being in threaded connection with the upper threaded part of the locking screw.

Preferably, the connecting rod insertion hole specifically includes: the first connecting rod jack and the second connecting rod jack;

the first connecting rod jack and the second connecting rod jack are symmetrically or asymmetrically arranged at two sides of the fixing hole; the diameters of the first connecting rod insertion hole and the second connecting rod insertion hole are equal or unequal, and the diameters of the first connecting rod insertion hole and the second connecting rod insertion hole are matched with the diameters of the connecting rods.

Preferably, the end fixing block further includes: a first side opening, a second side opening and an extrusion hole;

the first side opening is formed in the outer side of the tail end of the first connecting rod jack of the upper fixing hole and the lower fixing hole;

the second side opening is formed in the outer side of the tail end of the second connecting rod jack of the upper fixing hole and the lower fixing hole;

the extrusion hole is positioned in the upper fixing hole and is formed by the intersection of the first connecting rod jack and the second connecting rod jack and the upper fixing hole respectively.

The embodiment of the invention provides a closed locking device, which is used for solving the problems of insecure locking, poor closing effect, easy loosening and slipping of a connecting part, inflexible assembly and the like of the existing combined type fixing product, so that the combination form of the combined type fixing product is improved, the application range is wider, the connection is firmer and more reliable, the healing time is shortened, the success of the operation is ensured, and the pain of a patient is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of a closed locking apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a special-shaped block in the enclosed locking device according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a connecting rod in the closed locking apparatus according to the embodiment of the present invention;

FIG. 4 is a partial enlarged view of portion A of FIG. 3;

fig. 5 is a schematic structural view of a single rod fixing block 3A in the closed locking device according to the embodiment of the present invention;

fig. 6 is a schematic structural view of a double-rod fixing block 3B in the closed locking device according to the embodiment of the present invention;

FIG. 7 is a schematic structural view of a locking screw in the enclosed locking apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a head fixing block in the closed locking device according to the embodiment of the present invention;

FIG. 9 is a cross-sectional view of portion B-B of FIG. 5;

FIG. 10 is a cross-sectional view of section C-C of FIG. 6;

FIG. 11 is a cross-sectional view taken along line D-D of FIG. 8;

fig. 12 is a bottom view of a shaped block in the enclosed locking device according to an embodiment of the present invention;

fig. 13 is a side view (one) of a shaped block in the closed locking apparatus according to the embodiment of the present invention;

fig. 14 is a side view (two) of a shaped block in the closed locking apparatus according to the embodiment of the present invention;

FIG. 15 is a cross-sectional view of section E-E of FIG. 12;

fig. 16 is a schematic diagram of an embodiment of a closed locking device according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

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; the two components may be mechanically connected, directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 is a schematic overall structure diagram of a closed locking device provided in an embodiment of the present invention, fig. 2 is a schematic structural diagram of a special-shaped block in the closed locking device provided in the embodiment of the present invention, fig. 3 is a schematic structural diagram of a connecting rod in the closed locking device provided in the embodiment of the present invention, fig. 4 is a sectional view of a portion a in fig. 3, fig. 5 is a schematic structural diagram of a single rod fixing block 3A in the closed locking device provided in the embodiment of the present invention, fig. 6 is a schematic structural diagram of a double rod fixing block 3B in the closed locking device provided in the embodiment of the present invention, fig. 7 is a schematic structural diagram of a locking screw in the closed locking device provided in the embodiment of the present invention, and fig. 12 is a bottom view of the special-shaped block in the closed locking device; referring to fig. 1, 2, 3, 4, 5, 6, 7 and 12, a closed locking device according to an embodiment of the present invention includes: the special-shaped block 5, the connecting rod 2, the fixing block 3, the locking screw 1 and the end fixing block 4.

Preferably, in this embodiment, the plane where the second fixing portion 52 is located is set as a first plane, a plane parallel to the horizontal direction of the normal of the first plane is set as a second plane, and a plane parallel to the vertical direction of the normal of the first plane is set as a third plane; in this embodiment, the vertical direction inclination angle of the normal direction of the plane where the locking screw 1 and the second fixing portion 52 are located is a vertical inclination angle, and the vertical inclination angle is an included angle between the locking screw 1 and the third plane; similarly, the horizontal direction inclination angle of the normal of the plane where the locking screw 1 and the second fixing portion 52 are located is a horizontal inclination angle, and the horizontal inclination angle is an included angle between the locking screw 1 and the second plane.

Specifically, the special-shaped block 5 specifically includes a first fixing portion 51 and a second fixing portion 52; the special-shaped block 5 is used for matching with the bone surface of a fracture part and is fixed on the surface of a bone through the locking screw 1, and the first fixing part 51 is connected with the second fixing part 52 and is integrally formed.

The first fixing part 51 is of an arc-shaped curved surface structure and is used for being attached to the curved surface of the upper end of a bone at a fracture part and firmly fixed to the upper end of the bone at the fracture part through a locking screw 1, at least one pressurizing screw hole, an oblique-insertion pressurizing screw hole and a positioning hole are arranged in the first fixing part 51, and a first positioning hole 5160, two top pressurizing screw holes 510, a first oblique-insertion pressurizing screw hole 511, a second positioning hole 5161, a second oblique-insertion pressurizing screw hole 512, a third positioning hole 5162, two middle pressurizing screw holes 513, a fourth positioning hole 5163, a fifth positioning hole 5164, a third oblique-insertion pressurizing screw hole 514 and two lower pressurizing screw holes 515 are sequentially arranged from the top end of the first fixing part 51 along the arc-shaped curved surface; two top pressurizing screw holes 510 are symmetrically arranged on two sides of a first positioning hole 5160, a second positioning hole 5161 is arranged opposite to the first oblique inserting pressurizing screw hole 511, two middle pressurizing screw holes 513 are symmetrically arranged on two sides of a third positioning hole 5162, two sides of the third oblique inserting pressurizing screw hole 514 are respectively provided with a fourth positioning hole 5163 and a fifth positioning hole 5164, and two lower pressurizing screw holes 515 are adjacently arranged; the inner surface of the first fixing part 51 is an arc surface, so that the first fixing part 51 of the irregular block 5 is attached to the bone surface more tightly and fixed more firmly.

The two top pressurizing screw holes 510 are located on one side, close to the head of the special-shaped block 5, of the top end of the first fixing portion 51 and symmetrically arranged on two sides of a long shaft of the special-shaped block 5, the top pressurizing screw holes 510 are used for fixing the first fixing portion 51 on the surface of the top pressurizing screw holes through the locking screws 1 from two sides of the surface of a bone, the inner surface of the first fixing portion 51 is attached to a curved surface of the upper end of the bone of a fracture part, the inside of the top pressurizing screw holes 510 is composed of a butting portion and a threaded portion, the surface of the butting portion is a smooth.

in one embodiment, after the first locking screw is inserted into the top pressurizing screw hole 510, the first upper screw part of the first locking screw is screwed with the screw thread part of the top pressurizing screw hole 510, and as the first upper screw part is screwed with the fastening screw and bites, the screw cap part of the first locking screw stays in the abutting part of the top pressurizing screw hole 510, the first lower screw part and the screw head part of the first locking screw are respectively inserted into the bone after passing through the top pressurizing screw hole 510, the inclination angle formed by the first locking screw and the third plane is a first vertical inclination angle α, the first vertical inclination angle α ranges from 12 to 18, the inclination angle formed by the first locking screw and the second plane is a first horizontal inclination angle α ', the first horizontal inclination angle α' is 0 °, and the problem of screw hole location difficulty in nail placement in surgery can be reduced because the penetrating directions of the two top pressurizing screw holes 510 are the same and the two screw holes are spaced apart from each other.

The first inclined insertion pressurizing screw hole 511 is positioned on one side of the long axis of the special-shaped block 5 and is arranged below the top pressurizing screw hole 510, the first inclined insertion pressurizing screw hole 511 is used for fixing the first fixing part 51 on the surface of the bone surface from one side of the bone surface through the inclined insertion locking screw 1, the inner surface of the first fixing part 51 is attached to the curved surface of the upper end of the bone at the fracture part, and similarly, the top abutting part and the screw thread part are also arranged inside the first inclined insertion pressurizing screw hole 511;

in one embodiment, after the second locking screw is inserted into the first inclined insertion pressure screw hole 511, the second upper screw part of the second locking screw is screwed with the screw part of the first inclined insertion pressure screw hole 511, and as the second upper screw part is screwed and gripped with the fastening screw, the screw cap part of the second locking screw stays in the abutting part of the first inclined insertion pressure screw hole 511, and the second lower screw part and the screw head part of the second locking screw are inserted into the bone through the first inclined insertion pressure screw hole 511, respectively, and during the insertion process, the second locking screw and the third plane form an inclination angle of a second vertical inclination angle β which is 0 °, the second locking screw and the second plane form an inclination angle of a second horizontal inclination angle β' which is in the range of 9 to 15 °, and since the penetration direction of the first inclined insertion pressure screw hole 511 and the penetration direction of the top pressure screw hole 510 are different, the arrangement can realize that the locking screw 1 can be inserted into different regions of the bone, thereby achieving an increase in the holding force of the locking body 1 and enhancing the mechanical fixing effect of the structure.

The second inclined insertion pressurizing screw hole 512 is positioned on the other side of the long axis of the special-shaped block 5 and is arranged below the first inclined insertion pressurizing screw hole 511, the second inclined insertion pressurizing screw hole 512 is used for fixing the first fixing part 51 on the surface of the other side of the surface of the bone through the inclined insertion locking screw 1, the inner surface of the first fixing part 51 is attached to the curved surface of the upper end of the bone at the fracture part, and similarly, a butting part and a screw thread part are also arranged inside the second inclined insertion pressurizing screw hole 512;

in one embodiment, after the third locking screw is inserted into the second oblique-insertion compression screw hole 512, a third upper screw-connection portion of the third locking screw is screwed with the screw portion of the second oblique-insertion compression screw hole 512, and as the third upper screw-connection portion is screwed and gripped with the fastening screw, a screw cap portion of the third locking screw stays in the abutting portion of the second oblique-insertion compression screw hole 512, and a third lower screw-connection portion and a screw head portion of the third locking screw are respectively inserted into the bone after passing through the second oblique-insertion compression screw hole 512, during the implantation, an inclination angle formed by the third locking screw and a third plane is a third vertical inclination angle γ, the third vertical inclination angle γ ranges from 25 to 31 °, an inclination angle formed by the third locking screw and the second plane is a third horizontal inclination angle γ ', the third horizontal inclination angle γ' ranges from 4 to 11 °, wherein the third vertical inclination angle γ intersects with the second vertical inclination angle β, and the first oblique-insertion compression screw hole 511, the top compression screw hole 510 and the second oblique-insertion compression screw hole are inserted in different directions, thereby realizing that the bone-shot screw can be fixed to a bone-holding block with a more stable structure, and a more stable three-dimensional bone-holding effect is achieved.

The two middle pressurizing screw holes 513 are positioned below the second oblique inserting pressurizing screw hole 512 in the middle of the first fixing part 51 and are symmetrically arranged at two sides of the long axis of the special-shaped block 5, the two middle pressurizing screw holes 513 are used for fixing the first fixing part 51 on the surface of the middle end surface of the bone through the locking screws 1, so that the screws penetrating through the screw holes are uniformly distributed in all areas of the bone, and the front end of the bone is prevented from being placed into too many locking screws 1; similarly, the two middle pressurizing screw holes 513 also have abutting portions and threaded portions inside;

in one embodiment, after the fourth locking screw is inserted into the middle pressurizing screw hole 513, the fourth upper screw part of the fourth locking screw is screwed with the screw thread part of the pressurizing screw hole 513, as the fourth upper screw part is screwed and bitten with the fastening screw thread, the screw cap part of the fourth locking screw stays in the abutting part of the middle pressurizing screw hole 513, the fourth lower screw part and the screw head part of the fourth locking screw are inserted into the bone after respectively inserted into the middle pressurizing screw hole 513, during the insertion process, the inclination angle formed by the fourth locking screw and the third plane is a fourth vertical inclination angle δ, and the range of the fourth vertical inclination angle δ is 13-18 °; the inclination angle formed by the fourth locking screw and the second plane is a fourth horizontal inclination angle delta ', and the range of the fourth horizontal inclination angle delta' is 7-13 degrees; wherein the two middle pressurizing screw holes 513 have the same penetrating direction and are separated by a certain distance, the penetrating directions of the middle pressurizing screw hole 513, the first inclined inserting pressurizing screw hole 511, the top pressurizing screw hole 510 and the second inclined inserting pressurizing screw hole 512 are different, so that the locking screw 1 can be placed in different areas of the bone, a spatial three-dimensional crossing structure is constructed, the holding force of the locking screw 1 is increased, meanwhile, the special-shaped block 5 is more firmly fixed on the surface of the bone, and the biological and mechanical fixing effect of the whole structure is enhanced.

The third oblique inserting pressurizing screw hole 514 is positioned below the middle pressurizing screw hole 513 and is arranged on the central line of the special-shaped block 5, and the third oblique inserting pressurizing screw hole 514 is used for fixing the first fixing part 51 on the surface of the middle end surface of the bone through the locking screw 1, so that the first fixing part 51 is accurately positioned on the bone; similarly, the third oblique-insertion pressurizing screw hole 514 has a top abutting portion and a threaded portion therein;

in one embodiment, after the fifth locking screw is inserted into the third oblique insertion pressure screw hole 514, the fifth upper screw connection portion of the fifth locking screw is screwed with the lower edge portion of the third oblique insertion pressure screw hole 514, and as the fifth upper screw connection portion is screwed and bitten with the fastening screw thread, the screw cap portion of the fifth locking screw stays in the abutting portion of the third oblique insertion pressure screw hole 514, and the fifth lower screw connection portion and the screw head portion of the fifth locking screw are respectively inserted into the bone after passing through the third oblique insertion pressure screw hole 514, during the implantation, the inclination angle formed by the fifth locking screw and the third plane is a fifth vertical inclination angle epsilon, and the fifth vertical inclination angle epsilon is 0 deg.; the inclination angle formed by the fifth locking screw and the second plane is a fifth horizontal inclination angle epsilon', which is 0 deg..

Fig. 13 is a side view (a) of a profile block in a closed locking device according to an embodiment of the present invention, and referring to fig. 2 and 13, the radius of curvature of the arc surface of the inner surface of the first fixing portion 51 extending from the top to the middle is gradually increased, and the radius of curvature R1 of the bottom edge of the horizontal section between the top pressurizing screw hole 510 and the first oblique-insertion pressurizing screw hole 511 is in the range of 33 to 38 mm; the curvature radius of the bottom edge of the horizontal tangent plane between the second inclined inserting pressurizing screw hole 512 and the middle pressurizing screw hole 513 is R2, and the value range is 21-25 mm; the curvature radius of the bottom edge of the horizontal tangent plane between the third oblique inserting pressurizing screw hole 514 and the lower pressurizing screw hole 515 is R3, and the range of the curvature radius is 15-20 mm.

The two lower pressurizing screw holes 515 are positioned below the third lower obliquely inserted pressurizing screw hole 514 of the first fixing part 51 and symmetrically arranged at two sides of the long axis of the special-shaped block 5, the two lower pressurizing screw holes 515 are used for fixing the first fixing part 51 on the surface of the lower end surface of a bone through the locking screw 1, so that screws penetrating through the screw holes are uniformly distributed in all regions of the bone, the necrosis and excessive bone loss of the bone are avoided, and the collapse of the bone is avoided; similarly, the two lower pressurizing screw holes 515 also have a top abutting portion and a threaded portion inside;

in one embodiment, after the sixth locking screw is inserted into the two lower compression screw holes 515, the sixth upper screw portion of the sixth locking screw is screwed into the screw portions of the two lower compression screw holes 515, and as the sixth upper screw portion is screwed and gripped with the fastening screw, the screw cap portion of the sixth locking screw stays in the abutting portions of the two lower compression screw holes 515, and the sixth lower screw portion and the screw head portion of the sixth locking screw are respectively inserted into the bone after passing through the two lower compression screw holes 515, during the insertion process, the sixth locking screw and the third plane form an inclination angle of a sixth vertical inclination angle ζ, the range of the sixth vertical inclination angle ζ is 7 to 13 °, and the sixth vertical inclination angle ζ intersects with the fifth vertical inclination angle ∈; the inclination angle formed by the sixth locking screw and the second plane is a sixth horizontal inclination angle zeta ', and the sixth horizontal inclination angle zeta ' is equal to the fourth horizontal inclination angle epsilon '; wherein the two lower pressurizing screw holes 515 are arranged adjacently in the same penetrating direction, the lower pressurizing screw holes 515 are arranged symmetrically with the top pressurizing screw hole 510 and the middle pressurizing screw hole 513, the penetrating direction is different from the first oblique inserting pressurizing screw hole 511, the second oblique inserting pressurizing screw hole 512 and the third oblique inserting pressurizing screw hole 514, and the penetrating direction is different from the first pressurizing screw hole 51.

The positioning hole 516 is formed by thin circular holes, the positions of which can be flexibly set, is typically located at the top and the middle of the first fixing part 51, and specifically comprises a first positioning hole 5160, a second positioning hole 5161, a third positioning hole 5162, a fourth positioning hole 5163 and a fifth positioning hole 5164; the first positioning hole 5160 is located on the top of the first fixing portion 51 and between the two top pressurizing screw holes 510, the second positioning hole 5161 is located on the top of the first fixing portion 51 and between the second oblique-insertion pressurizing screw hole 512 and the top pressurizing screw hole 510, the third positioning hole 5162 is located in the middle of the first fixing portion 51 and between the two middle pressurizing screw holes 513, the fourth positioning hole 5163 and the fifth positioning hole 5164 are respectively located below the two middle pressurizing screw holes 513 and on both sides of the third oblique-insertion pressurizing screw hole 514, the aperture of the positioning hole 516 is smaller than that of the pressurizing screw hole, and the positioning hole 516 is used for temporarily fixing the irregular block 5 in the operation.

fig. 13 is a side view (one) of a special-shaped block in the closed locking device according to the embodiment of the present invention, fig. 14 is a side view (two) of the special-shaped block in the closed locking device according to the embodiment of the present invention, as shown in fig. 13, the inclination angle of the third vertical inclination angle γ is the largest, as shown in fig. 14, the inclination angle of the second horizontal inclination angle β' is the largest, and in the embodiment of the present invention, the pressurizing screw holes are not arranged on one plane, which can realize that the locking screw 1 is inserted into different areas of the bone, so as to construct a spatial three-dimensional crossing structure, achieve the purpose of increasing the holding force of the locking screw 1, and simultaneously, the special-shaped block 5 is more firmly fixed on the bone surface, thereby enhancing the biomechanic.

Fig. 15 is a cross-sectional view of a portion E-E in fig. 12, and as shown in the figure, the second fixing portion 52 is a horizontal structure and is used for inserting and fixing the first rod body 21 of the connecting rod 2 to realize the firm connection between the special-shaped block 5 and the connecting rod 2, at least one fixing screw hole 520 and two connecting rod connecting screw holes 522 are arranged in the second fixing portion, two adjacent fixing screw holes 520 are arranged on the upper surface of the second fixing portion 52, and a connecting rod screw hole 522 is arranged on the side surface of the second fixing portion 52. The two fixing screw holes 520 are positioned on the upper surface of the second fixing part 52, the middle part of the upper surface is an arc-shaped curved surface with a certain radian, the two fixing screw holes 520 are arranged in the arc-shaped curved surface and are adjacently arranged along the long axis direction of the second fixing part 52, the fixing screw holes 520 are specifically composed of an upper fixing screw hole 5201 and a lower fixing screw hole 5202, the surface of the upper fixing screw hole 5201 is a smooth curved surface and is matched with an upper screwed part 12 of a locking screw 1, the surface of the lower fixing screw hole 5202 is provided with fastening threads, a telescopic groove 521 is arranged between the upper fixing screw hole 5201 and the lower closing part 5202, and the aperture of the fixing screw hole 520 is the same as that of a pressurizing screw; the inner surface of the second fixing portion 52 is also provided with an arc-shaped curved surface with a certain radian at the part where the inner surface of the second fixing portion 52 is attached to the backbone of the skeleton, so that the second fixing portion 52 is attached to the skeleton more tightly, and the fracture part is reinforced more firmly.

The connecting rod screw holes 522 are parallel to each other along the long axis direction of the second fixing portion 52 and are respectively located at two sides of the fixing screw hole 520, and the connecting rod screw holes 522 are used for firmly connecting the connecting rod 2 and the special-shaped block 5 together through a locking screw.

As shown in fig. 13, the intersection of the connecting rod screw hole 522 and the fixing screw hole 520 has a cross hole 523, and the cross hole 523 is mainly used for pressing the connecting rod 2 by the locking screw 1, so as to fix the connecting rod 2 in the second fixing portion 52.

In one embodiment, the two connecting rods 2 are inserted into the connecting rod screw holes 522, after the seventh locking screw is inserted into two adjacent fixing screw holes 520, the seventh upper screw portion of the seventh locking screw is screwed with the lower fixing screw hole 5202 of the fixing screw hole 520, as the seventh upper screw portion is screwed with the fastening screw and bites, the gap of the expansion slot 521 is further compressed, the nut portion of the seventh locking screw stays in the upper fixing screw hole 5201 of the fixing screw hole 520, the connecting rod 2 is fixed to the second fixing portion 52 through the cross hole 523 while pressing the connecting rod screw hole 522, and the seventh lower screw portion and the head of the seventh locking screw pass through the fixing screw hole 520 and are implanted into the bone.

The connecting rod 2 comprises a first rod body 21, a second rod body 22 and a third rod body 23 in sequence; connecting rod 2 is used for pegging graft respectively and goes into in dysmorphism 5 and end fixed block 4 and fixed block 3, it is more accurate to realize that the fixed of fracture position skeleton is more firm and counterpoint, first body of rod 21, second body of rod 22 and third body of rod 23 set up as an organic whole, the both ends of connecting rod 2 are smooth and flat button head, can realize the both ends of connecting rod 2 and the complete connection of the connecting rod connecting hole of dysmorphism piece 5 or end fixed block 4, connecting rod 2 adopts titanium alloy or stainless steel to make, good elasticity has, corrosion resistance and intensity, titanium alloy material ensures that connecting rod 2 has better rigidity and bending resistance can guarantee to add the requirement of firm nature to the fracture position in the fracture operation treatment, good operability and practicality are possessed.

The first body of rod 21 is located the top of connecting rod 2, and the first body of rod 21 of connecting rod 2 inserts in special-shaped piece 5 for the one end and the special-shaped piece 5 of connecting rod 2 realize being connected.

In one embodiment, the first rod 21 is inserted into the second fixing portion 52 of the special-shaped block 5, the second fixing portion 52 has two connecting rod connecting screw holes 522, and the first rod 21 is inserted into the two connecting rod connecting screw holes 522 respectively; when the locking screw 1 is inserted into the upper fixing screw hole 5201 and then screwed into the lower fixing screw hole 5202, the screw cap of the locking screw 1 abuts against the upper fixing screw hole 5201, the upper screwing part of the locking screw 1 is screwed with the lower fixing screw hole 5202, and the upper fixing screw hole 5201 and the lower fixing screw hole 5202 are tightly occluded with the first rod 21 as the locking screw 1 is screwed with the lower fixing screw hole 5202, so that the first rod 21 is occluded and fixed on the special-shaped block 5.

The second rod body 22 is positioned in the middle of the connecting rod 2, and the second rod body 22 of the connecting rod 2 is inserted into the fixing block 3 and used for firmly fixing the connecting rod 2 and the bone of the fracture part.

In one embodiment, the second rod 22 is inserted between the upper edge portion and the lower edge portion of the fixed block 3; when the locking screw 1 is threaded into the lower edge portion after penetrating through the upper edge portion, the screw cap 11 of the locking screw 1 abuts against the upper edge portion, the upper threaded portion of the locking screw 1 is screwed with the lower edge portion, and the upper edge portion and the lower edge portion are tightly engaged with the second rod body 22 along with the screwing of the lower edge portion of the locking screw 1, so that the fixing block 3 is engaged and fixed on the second rod body 22.

The third body of rod 23 is located the bottom of connecting rod 2, and the end fixed block 4 is gone into in the grafting of the third body of rod 23 for the other end and the end fixed block 4 realization of connecting rod 2 are connected.

In one embodiment, the third rod 23 is inserted into the end fixing block 4, the end fixing block 4 has a first connecting rod insertion hole and a second connecting rod insertion hole, and the third rod 23 is inserted into the first connecting rod insertion hole and the second connecting rod insertion hole respectively; when the locking screw 1 penetrates through the upper fixing hole and then is screwed into the lower fixing hole, the screw cap of the locking screw 1 abuts against the upper fixing hole, the upper screwing part 11 of the locking screw 1 is screwed with the lower fixing hole, and the upper fixing hole and the lower fixing hole are meshed with the third rod body 23 tightly along with the screwing of the locking screw 1 with the lower fixing hole, so that the end fixing block 4 is meshed and fixed on the third rod body 23.

In addition, the connecting rod 2 further comprises grooves 24 and protrusions 25, the grooves 24 are arranged on the surface of the connecting rod 2 at equal intervals, the inner sides of the grooves 24 are arc-shaped curved surfaces, the grooves 24 are used for increasing the friction force between the surface of the connecting rod 2 and the fixing block 3, the phenomenon that the fixing block 3 is detached in the operation process is effectively avoided, the interval between every two adjacent grooves 24 is 0.35-0.4 mm, and the distance between the center lines of every two adjacent grooves 24 is 1.14-1.57 mm; protruding 25 sets up between two adjacent recesses 24, the surface of connecting rod 2 is provided with a plurality of equally spaced arrangement's protruding 25, protruding 25 cooperates with the screw cap part of locking screw 1, realize the effect of locking screw 1 extrusion and fixed connection pole 2, wherein, recess 24 and protruding 25 evenly distribute in the surface of connecting rod 2, on the one hand, the doctor of being convenient for in the operation process wears rubber gloves and conveniently picks the body of rod and carry out operations such as corresponding rotation or position control, on the other hand, can restrict fixed block 3 and freely slide and carry out accurate location on the body of rod.

The fixing block 3 specifically comprises an upper edge part (not shown in the figure), a lower edge part (not shown in the figure), a side opening (not shown in the figure), a connecting rod through hole (not shown in the figure) and a side pressure hole (not shown in the figure); the fixing block 3 is inserted on the connecting rod 2 and is used for being matched with the locking screw 1 to fix the skeleton of the fracture part; the upper edge part is located the upper end of fixed block 3, and the lower edge part is located the lower extreme of fixed block 3, is provided with the side opening between upper edge part and the lower edge part, and the connecting rod through-hole is located the side of fixed block 3, and the side opening communicates with the connecting rod through-hole for locking screw 1 can adjust connecting rod 2 by the extruded intensity of locking screw through the opening of extrusion side, and the side pressure hole is located upper edge part.

The upper edge part comprises an upper fixing screw hole, and the hole wall of the upper fixing screw hole is a smooth curved surface and is used for abutting against the screw cap of the locking screw 1;

the lower edge part comprises a lower fixed screw hole, and the hole wall of the lower fixed screw hole is provided with a fastening thread for being in screw connection with an upper screw connection part of the locking screw 1; the aperture of the upper fixing screw hole is larger than that of the lower fixing screw hole.

The side opening is specifically seted up on between fixed spiro union hole and the lower fixed spiro union hole, further side opening and connecting rod through-hole intercommunication, make it is in the detached state to go up reason part and lower edge part, the side opening is used for adjusting the interval between reason part and the lower edge part through locking screw 1, thereby make the slip that fixed block 3 can be on connecting rod 2 and pinpoint, it is specific, locking screw 1's screw cap portion and last spiro union portion extrude the reason part and the lower edge part on fixed block 3 respectively, realize adjusting the purpose of side open-ended opening size and extrusion connecting rod 2.

The connecting rod through-hole sets up in the side of fixed block 3, specifically lies in between upper edge part and the lower edge part, and the second body of rod 22 of inserting into connecting rod 2 is inserted through the connecting rod through-hole to fixed block 3, and the aperture of connecting rod through-hole and the diameter phase-match of connecting rod 2, the connecting rod through-hole is used for cooperating with locking screw 1, locks and fixes connecting rod 2 in fixed block 3.

The side pressure hole is positioned in the upper fixing threaded hole and formed by the intersection of the connecting rod through hole and the upper fixing threaded hole, and the side pressure hole is used for extruding and fixing the connecting rod 2.

Preferably, in the present embodiment, the fixing block 3 provides two specifications, namely a single-rod fixing block 3A and a double-rod fixing block 3B, and for the numbers of the single-rod fixing block 3A and the double-rod fixing block 3B shown in the figure, only new numbers are used for different parts and functional components, and the numbers of the original fixing block 3 are used for the same parts and functional components.

Fig. 9 is a cross-sectional view of a portion B-B in fig. 5, and referring to fig. 5 and 9, the single rod fixing block 3A is a semi-closed structure, and the single rod fixing block 3A specifically includes an upper edge portion 31A, a lower edge portion 32A, a first side opening 33A, and a connecting rod through hole 34A; the upper edge part 31A and the lower edge part 32A are oppositely arranged, a first side opening 33A is formed between the upper edge part 31A and the lower edge part 32A, the connecting rod through hole 34A is communicated with the first side opening 33A, and the first side opening 33A separates the upper edge part 31A from the lower edge part 32A, so that the single-rod fixing block 3A is in a semi-closed state.

The upper edge part 31A is located at the upper end of the single-rod fixing block 3A, the upper edge part 31A comprises an upper fixing screw hole 311A, and the hole wall of the upper fixing screw hole 311A is a smooth curved surface and is used for abutting against the screw cap of the locking screw 1.

The lower edge part 32A is positioned at the lower end of the single-rod fixing block 3A, the lower edge part 32A comprises a lower fixing screw hole 321A, and the hole wall of the lower fixing screw hole 321A is provided with a fastening thread for being in screw connection with the upper screw part of the locking screw 1; the upper fixing screw hole 311A is opposite to the lower fixing screw hole 321A, and the aperture of the lower fixing screw hole 321A is smaller than that of the upper fixing screw hole 311A.

The first side opening 33A is opened between the upper fixing screw hole 311A and the lower fixing screw hole 321A, and further the first side opening 33A is communicated with the connecting rod through hole 34A, so that the upper edge portion 31A and the lower edge portion 32A are in a separated state, and the first side opening 33A is used for adjusting the distance between the upper edge portion 31A and the lower edge portion 32A, so that the single rod fixing block 3A can slide on the connecting rod 2 and perform accurate positioning, and specifically, the single rod fixing block 3A presses the upper edge portion 31A and the lower edge portion 32A through the locking screw 1, so that the adjustment of the opening size of the first side opening 33A is realized and the connecting rod 2 is pressed.

The connecting rod through hole 34A is arranged on the side surface of the single-rod fixing block 3A, and is specifically positioned between the upper edge part 31A and the lower edge part 32A, the aperture of the connecting rod through hole 34A is matched with the diameter of the connecting rod 2, and the connecting rod through hole 34A is used for being matched with the locking screw 1 to lock and fix the connecting rod 2 in the single-rod fixing block 3A.

The first side pressure hole 35A is formed at the intersection of the connecting rod passing hole 34A and the upper fixing screw hole 311A in the upper fixing screw hole 311A, and the first side pressure hole 35A is used to press and fix the connecting rod 2.

The single-rod fixing block 3A can rotate around the connecting rod 2 by any angle through the connecting rod through hole 34A, and is used for adjusting the implantation direction of the locking screw 1.

In one embodiment, when the connecting rod 2 is inserted into the connecting rod through hole 34A, the locking screw 1 is inserted through the upper fixing screw hole 311A and the lower fixing screw hole 321A, the nut of the locking screw 1 abuts against the upper fixing screw hole 311A, and the upper screw part of the locking screw 1 is screwed with the lower fixing screw hole 321A, so that the locking screw 1 presses the upper edge portion 31A and the lower edge portion 32A while the nut presses the connecting rod 2 through the first side pressing hole 35A, thereby tightly fixing the second rod 22 of the connecting rod 2 in the connecting rod through hole 34A of the single rod fixing block 3A.

Fig. 10 is a cross-sectional view of a portion C-C in fig. 6, and as shown in fig. 6 and 10, the double-rod fixing block 3B is a fully-enclosed structure, and the double-rod fixing block 3B specifically includes an upper edge portion 31B, a lower edge portion 32B, a second side opening 33B, and two connecting rod through holes 34B; wherein, the upper edge part 31B and the lower edge part 32B are oppositely arranged, the second side opening 33B is opened inside the double-rod fixing block 3B, the two connecting rod through holes 34B are respectively communicated with the second side opening 33B, and the second side opening 33B separates the upper edge part 31B and the lower edge part 32B inside the double-rod fixing block 3B.

The upper edge part 31B is located at the upper end of the double-rod fixing block 3B, the upper edge part 31B comprises an upper fixing screw hole 311B, and the hole wall of the upper fixing screw hole 311B is a smooth curved surface and is used for abutting against the screw cap of the locking screw 1.

The lower edge part 32B is positioned at the lower end of the double-rod fixing block 3B, the lower edge part 32B comprises a lower fixing screw hole 321B, and the hole wall of the lower fixing screw hole 321B is provided with a fastening thread for being screwed with the upper screw part of the locking screw 1; the upper fixing screw hole 311B is opposite to the lower fixing screw hole 321B, and the aperture of the lower fixing screw hole 321B is smaller than that of the upper fixing screw hole 311B.

The second side opening 33B is opened inside the double-rod fixing block 3B and is located between the upper fixing screw hole 311B and the lower fixing screw hole 321B, and further the second side opening 33B is respectively communicated with the two connecting rod through holes 34B, so that the upper edge portion 31B and the lower edge portion 32B inside the double-rod fixing block 3B are in a separated state, the second side opening 33B is used for adjusting the distance between the upper edge portion 31B and the lower edge portion 32B, so that the double-rod fixing block 3B is firmly fixed on the connecting rod 2 and simultaneously presses the connecting rod 2, specifically, the double-rod fixing block 3B presses the upper edge portion 31B and the lower edge portion 32B through the locking screw 1, so that the distance between the upper edge portion 31B and the lower edge portion 32B is adjusted and the two connecting rods 2 are respectively pressed.

Two connecting rod through holes 34B are provided in the side of the dual rod fixing block 3B, one of which is located on one side of the connecting portion of the upper edge portion 31B and the lower edge portion 32B, and the other is located on the other side of the connecting portion of the upper edge portion 31B and the lower edge portion 32B, the aperture of the connecting rod through hole 34B matches the diameter of the connecting rod 2, and the connecting rod through hole 34B is used for matching with the locking screw 1 to lock and fix the connecting rod 2 in the dual rod fixing block 3B.

In addition, the double-rod fixing block 3B is provided with two second side pressure holes 35B, the second side pressure holes 35B are positioned in the upper fixing screw holes 311B, the two second side pressure holes 35B are symmetrically arranged and formed by the intersection of the two connecting rod through holes 34B and the upper fixing screw holes 311B, and the second side pressure holes 35B are used for extruding and fixing the connecting rods 2.

The double-rod fixing block 3B is inserted into the second rod body 22 of the connecting rod 2 by using the two connecting rod through holes 34B, so that the double-rod fixing block 3B can stably move on the connecting rod 2 through the two connecting rod through holes 34B without the phenomenon that the fixing block 3 rotates around the connecting rod 2.

In an embodiment, when the connecting rod 2 is inserted into the two connecting rod through holes 34, respectively, and the locking screw 1 is inserted through the upper fixing screw hole 311B and the lower fixing screw hole 321B, the screw cap of the locking screw 1 abuts against the upper fixing screw hole 311B, and the upper screw part of the locking screw 1 is screwed with the lower fixing screw hole 321B, so that the locking screw 1 presses the upper edge portion 31B and the lower edge portion 32B while the screw cap presses the connecting rod 2 through the two second side pressing holes 35B, thereby tightly fixing the connecting rod 2 in the two connecting rod through holes 34B of the dual rod fixing block 3B.

The locking screw 1 sequentially comprises a screw cap 11, an upper screw joint part 12, a lower screw joint part 13 and a nail head 14; the locking screw 1 is used for penetrating through the fixing block 3 and implanting into a bone at a fracture part to realize that the bone at the fracture part is tightly fixed on the connecting rod 2; the screw cap 11, the upper screw joint part 12, the lower screw joint part 13 and the nail head 14 are of an integrally formed structure, the upper screw joint part 12 is connected with the screw cap 11, the lower screw joint part 13 is connected with the upper screw joint part 12, and the nail head 14 is connected with the lower screw joint part 13; the upper surface and the lower surface of the screw cap 11 are designed to be smooth curved surfaces and have no threads, so that the screw cap 11 is completely abutted against an upper fixing screw hole on the surface of the fixing block 3, the surfaces of the upper screw part 12 and the lower screw part 13 are designed to be double-thread or single-thread, so that the locking screw 1 is screwed with bones through threads, the nail head 14 is designed to be a self-tapping blade, the bones are quickly cut through the self-tapping blade, and the locking screw 1 can be quickly implanted into the bones.

The upper surface of the screw cap 11 has a quincunx or other mounting hole 110, and the upper surface mounting hole of the screw cap 11 is designed in a quincunx manner for the following reasons: on one hand, a special tool is provided to ensure that the whole stress of the locking screw 1 is balanced in the process of implanting the locking screw 1 into the bone, so that the problems of rod body fracture or screw cap 11 damage caused by uneven stress are avoided; on the other hand, the quincunx mounting hole 110 can transmit larger and more stable torque than a common hexagonal socket, and simultaneously effectively avoid the phenomenon of slipping during screwing the screw cap 11; the lower surface of the screw cap 11 is of a spherical structure and is provided with an indent, the spherical structure is matched with the upper fixing threaded hole of the fixing block 3, and the spherical diameter is 2-5 mm.

In one embodiment, when the screw cap 11 is screwed into the quincunx or other mounting hole 110 of the upper surface of the screw cap 11 by using a special tool so that the locking screw 1 is inserted into the upper fixing screw hole 311A and the lower fixing screw hole 321A of the single rod fixing block 3A, the lower screw portion 13 and the head 14 of the locking screw 1 are sequentially inserted into the lower fixing screw hole 321A and then implanted into the bone, the upper screw portion 12 of the locking screw 1 is screwed into the lower fixing screw hole 32A, the screw cap 11 of the locking screw 1 abuts against the upper fixing screw hole 311A, and as the portion of the locking screw 1 screwed into the upper screw cap 11 and the upper fixing screw hole 311A gradually increases, the range of the screw cap 11 is completely fitted and accommodated in the upper fixing screw hole 311A of the single rod fixing block 3A.

In another embodiment, when a special tool is used to screw the quincunx or other type of mounting hole 110 on the upper surface of the screw cap 11, so that the locking screw 1 is inserted through the upper fixing screw hole 311B and the lower fixing screw hole 321B of the dual-rod fixing block 3B, the lower screw part 13 and the head 14 of the locking screw 1 sequentially pass through the upper fixing screw hole 311B and are implanted into the bone, the upper screw part 12 of the locking screw 1 is screwed into the lower fixing screw hole 321B, the cap 11 of the locking screw 1 abuts against the upper fixing screw hole 311B, and as the part of the upper screw part 12 of the locking screw 1 screwed deep into the screw cap 11 and the upper fixing screw hole 311B gradually increases, the screw cap 11 is completely fitted and accommodated in the upper fixing screw hole 311B of the dual-rod fixing block 3B.

The upper screw-connection portion 12 is connected with the screw cap 11, the upper screw-connection portion 12 is designed to have a double thread, and the double thread of the upper screw-connection portion 12 is screwed with the thread of the lower fixing screw-engagement hole of the fixing block 3 to prevent the locking screw 1 from falling off or being pulled out from the fixing block 3.

In one embodiment, after the locking screw 1 is inserted through the upper fixing screw hole 311A and the lower fixing screw hole 321A of the single rod fixing block 3A, the lower screw part 13 and the head 14 of the locking screw 1 sequentially pass through the lower fixing screw hole 321A and are implanted into the bone, the upper screw part 12 of the locking screw 1 is screwed with the thread in the lower fixing screw hole 321A, and the upper screw part 12 of the locking screw 1 is fully screwed into the lower fixing screw hole 321A along with the complete abutment of the nut 11 of the locking screw 1 and the upper fixing screw hole 311A, so that the upper screw part 12 is fully screwed into the lower fixing screw hole 321A of the single rod fixing block 3A.

In another embodiment, after the locking screw 1 is inserted through the upper fixing screw hole 311B and the lower fixing screw hole 321B of the dual rod fixing block 3B, the lower screw portion 13 and the head 14 of the locking screw 1 sequentially pass through the lower fixing screw hole 321B and are implanted into the bone, the upper screw portion 12 of the locking screw 1 is screwed with the screw thread in the lower fixing screw hole 321B, and the upper screw portion 12 of the locking screw 1 is fully screwed into the lower fixing screw hole 321B along with the complete abutment of the nut 11 of the locking screw 1 and the upper fixing screw hole 311B, so that the upper screw portion 12 is fully screwed into the lower fixing screw hole 321B of the dual rod fixing block 3B.

The lower screw joint part 13 is connected with the upper screw joint part 12, the lower screw joint part adopts a single-thread design, the single-thread of the lower screw joint part 13 is used for being connected with bones, the holding force and the fixing effect are enhanced, and the diameter of the lower screw joint part 13 is smaller than that of the upper screw joint part 12.

Specifically, the thread section at the bottom of the single thread is a cortical bone thread section.

The nail head 14 is connected with the lower screw-connection part 13, the nail head 14 is provided with more than one self-tapping blade 141, the cross section and the longitudinal section of the self-tapping blade 141 are arc-shaped, and the self-tapping blade 141 is used for quickly cutting bones and accurately implanting the lower screw-connection part 13 of the locking screw 1 into the fracture part

In one embodiment, after the locking screw 1 is inserted from the upper fixing screw hole 311A and the lower fixing screw hole 321A of the single-rod fixing block 3A, the self-tapping blade 141 of the nail head 14 is driven by the nut 11 of the locking screw 1 to cut the bone, and the lower screw part 13 of the locking screw 1 is driven to be screwed into the bone by using a single thread; the upper screw-connection portion 12 is screwed into the lower edge portion 32A of the single-rod fixing block 3A by means of double-thread screw after passing through the upper edge portion 31A of the single-rod fixing block 3A, and the screw cap 11 of the locking screw 1 abuts against the upper edge portion 31A of the single-rod fixing block 3A, so that the upper edge portion 31A and the lower edge portion 32A of the single-rod fixing block 3A are engaged with each other as the upper screw-connection portion 12 is screwed deep into the lower edge portion 32A of the single-rod fixing block 3A, whereby the upper edge portion 31A and the lower edge portion 31A are engaged with the connecting rod 2 inserted between the upper edge portion 31A and the lower edge portion 32A.

Fig. 8 is a schematic structural diagram of a tip fixing block in the closed locking device according to an embodiment of the present invention, and as shown in the drawing, the tip fixing block 4 specifically includes a fixing hole 41, a connecting rod insertion hole 42, a first side opening 43, a second side opening 44, a positioning hole 45, and a pressing hole 46; fixed orifices 41 set up in end fixed block 4, connecting rod jack 42 sets up in the side of end fixed block 4, first side opening 43 and second side opening 44 symmetry or asymmetric the setting in the both sides of end fixed block 4, locating hole 45 is located the end of end fixed block 4, extrusion hole 46 is located the inside of fixed orifices 41, make locking screw 1 directly produce the extrusion relation with connecting rod 2, end fixed block 4 is used for the third body of rod of grafting connecting rod 2, the realization seals fixedly to the one end of connecting rod 2, and then avoid fixed block 3 to take place the phenomenon of taking off the pole.

The fixing holes 41 specifically include an upper fixing hole 411 and a lower fixing hole 412; the upper fixing hole 411 is positioned at the upper part of the end fixing block 4, and the inner part of the upper fixing hole 411 is a smooth curved surface and is used for abutting against the screw cap 11 of the locking screw 1; the lower fixing hole 412 is located at the lower part of the end fixing block 4, a fastening thread is arranged inside the lower fixing hole 412 and is used for being in threaded connection with the upper threaded part 12 of the locking screw 1, and the fixing hole 41 is used for tightly fixing the connecting rod 2 and the end fixing block 4 together through the matching of the locking screw 1.

Fig. 11 is a cross-sectional view taken along line D-D of fig. 8, showing that the connecting rod insertion hole 42 specifically includes a first connecting rod insertion hole 421 and a second connecting rod insertion hole 422; the third body of rod 23 of connecting rod 2 is pegged graft with end fixed block 4 through first connecting rod jack 421 and second connecting rod jack 422, and is specific, under the unable condition that satisfies the operation demand of length when connecting rod 2, satisfies the demand of operation through the length that adjusts connecting rod 2 and insert connecting rod jack 42.

Preferably, in the embodiment of the present invention, the hole diameters of the first connecting rod insertion hole 421 and the second connecting rod insertion hole 422 are equal or different, and the hole diameters of the first connecting rod insertion hole and the second connecting rod insertion hole are matched with the diameters of the connecting rods.

The first side opening 43 is opened at the outer side of the tail end of the first connecting rod insertion hole 421 of the upper fixing hole 411 and the lower fixing screw hole 412, and the second side opening 44 is opened at the outer side of the tail end of the second connecting rod insertion hole 422 of the upper fixing hole 411 and the lower fixing screw hole 412; the first side opening 43 and the second side opening 44 are used to observe the insertion of the connecting rod 2 into the connecting rod insertion hole 42.

The positioning hole 45 is located at opposite ends of the first connecting rod insertion hole 421 and the second connecting rod insertion hole 422, and is used for temporarily fixing the end fixing block 4 in operation.

The pressing hole 46 is formed at the intersection of the upper fixing hole 411 and the first and second connection rod insertion holes 421 and 422, respectively, and the pressing hole 46 is used for directly pressing and fixing the connection rod 2 by the locking screw 1.

In addition, end fixed block 4 still includes compression seam 47, compression seam 47 sets up in the inside of end fixed block 4, be located specifically between last fixed orifices 411 and the lower fixed orifices 412, compression seam 47 and first connecting rod jack 421 and second connecting rod jack 422 intercommunication, make the last fixed orifices 411 that is located end fixed block 4 inside and lower fixed orifices 412 can separate, compression seam 47 is used for adjusting the gap between last fixed orifices 411 and the lower fixed orifices 412 through locking screw 1, thereby make the inseparable extrusion connecting rod 2 of end fixed block 4, make the third body of rod 23 of connecting rod 2, locking screw 1 and the inseparable fixed of end fixed block 4 together.

In one embodiment, after the locking screw 1 is inserted into the upper fixing hole 411 and the lower fixing hole 412 of the end fixing block 4, the self-tapping blade 141 of the nail head 14 is driven by the screw cap 11 of the locking screw 1 to cut the bone, and the lower screwing part 13 of the locking screw 1 is driven to be screwed into the bone by using a single thread; the upper screw-connection portion 12 is inserted into the upper fixing hole 411 of the end fixing block 4 and then screwed into the lower fixing hole 412 of the end fixing block 4 by using a double-thread screw, and the screw cap 11 of the locking screw 1 abuts against the upper fixing hole 411 of the end fixing block 4, so that the locking screw 1 further compresses the gap of the compression slit 47 along with the screwing of the upper screw-connection portion 12 and the lower fixing hole 412 of the end fixing block 4, and the third rod body 23 of the connecting rod 2 inserted into the connecting rod insertion hole 42 is tightly connected with the connecting rod connection insertion hole 42.

The above is a description of the components of the closed locking device and the connection relationship between them according to the embodiment of the present invention, fig. 15 is a cross-sectional view of the portion E-E in fig. 12, and fig. 16 is a schematic view of an embodiment of a closed locking device according to the embodiment of the present invention; the use of the closed locking device will be described in detail below with reference to fig. 1 to 12 and fig. 15 to 16:

example 1

Doctors use the fixing device for combined assembly aiming at different types of fractures in fracture surgery. The following describes the combined use process in detail by taking the special-shaped block 5, the connecting rod 2, the single-rod fixing block 3A, the double-rod fixing block 3B, the locking screw 1 and the end fixing block 4 as examples.

The first rod bodies 21 of the two connecting rods 2 are aligned with the two connecting rod screw holes 522 of the second fixing portion 52 of the special-shaped block 5 respectively, then the two connecting rods 2 are inserted into the second fixing portion 52 of the special-shaped block 5 along the opening direction of the connecting rod screw holes 522 until the front ends of the first rod bodies of the two connecting rods 2 are abutted against the tail ends of the connecting rod screw holes 522 respectively, then the connecting rod through holes 34B of the double-rod fixing block 3B are aligned with the two connecting rods 2 respectively and are inserted into the connecting rods 2, then the connecting rod through holes 34A of the single-rod fixing block 3A are aligned with one of the connecting rods 2 and are inserted into the connecting rods 2, one or more single-rod fixing blocks 3A or double-rod fixing blocks 3B can be added according to the needs in the operation, the specific steps are the same as the steps, and are not repeated. The single-rod fixing block 3A and the double-rod fixing block 3B can slide along the part of the second rod body 22 in sequence, and through the grooves and the bulges which are alternately arranged on the surfaces of the connecting rods 2, a doctor can control the sliding distance of the single-rod fixing block 3A or the double-rod fixing block 3B on the two connecting rods 2, so that the single-rod fixing block 3A or the double-rod fixing block 3B can slide to any preset position on the connecting rods 2, then the third rod bodies 23 of the two connecting rods 2 are respectively aligned with the connecting rod insertion holes 42 of the end fixing block 4 and are inserted into the end fixing block 4 along the opening direction of the insertion holes, thus realizing the pre-assembly of the semi-closed fixing device, and for the pre-assembled fixing device, locking nuts are respectively required to be arranged in the end fixing block 4 and the special-shaped block 5 at the two ends, and the locking nuts can improve the, so that the fixing means can remain as one piece. And then moving the whole fixing device to the surface of the bone at the fracture position, marking the position of the implanted screw in advance according to the fracture condition, sliding the single-rod fixing block 3A and/or the double-rod fixing block 3B at the middle part to the marked screw position, and screwing the locking screws 1 in sequence to fix the fixing device on the bone. Specifically, after the locking screw 1 is inserted through the upper fixing screw hole 311B and the lower fixing screw hole 321B of the dual-rod fixing block 3B, a quincunx mounting hole on the upper surface of the screw cap 11 is screwed by using a special tool, the screw head 14 drives the self-tapping blade 141 to cut the bone under the driving of the screw cap 11, and drives the lower screw part 13 to be screwed into the bone at the fracture site by using a single thread, and at the same time, the upper screw part 12 is inserted through the upper fixing screw hole 311B and then enters the lower fixing screw hole 321B, the double threads of the upper screw part 12 are screwed with the fastening threads in the lower fixing screw hole 321B, the screw cap 11 abuts against the upper fixing screw hole 311B, the second side opening 33B of the dual-rod fixing block 3B is further pressed downwards along with the screw cap 11 being screwed deeply into the screw cap 11 until the screw cap 11 is completely engaged with the upper fixing screw hole 311B, and the gap of the second side opening 33B is not changed any more, meanwhile, the dent on the lower surface of the screw cap 11 is compressed and fixed with the connecting rod 2 through the second cross holes 35B which are symmetrically arranged, so that the locking screw 1 is completely meshed and fixed on the bone with the double-rod fixing block 3B and the connecting rod 2; the same steps are repeated, and the locking screw 1 is sequentially inserted into the single-rod fixing block 3A positioned in the middle of the fixing device for fixing. After the middle fixing block 3 is fixed, the end fixing blocks 4 and the special-shaped block 5 at two ends are respectively fixed, the fixing of the special-shaped block 5 is specifically that a locking screw 1 penetrates through an upper fixing screw hole 5201 and a lower fixing screw hole 5202 of the special-shaped block 5 for locking and fixing, specifically, after the locking screw 1 penetrates through the upper fixing screw hole 5201 and the lower fixing screw hole 5202 of the special-shaped block 5, a tool is used for screwing a quincuncial mounting hole on the upper surface of a screw cap 11, a screw head 14 drives a self-tapping edge 141 to cut a bone under the driving of the screw cap 11 and drives a lower screwing part 13 to be screwed into the bone at a bone fracture part by a single thread, meanwhile, the upper screwing part 12 penetrates through the upper fixing screw hole 5201 and then enters the lower fixing screw hole 5202, the double thread of the upper screwing part 12 is screwed with the fastening thread in the lower fixing screw hole 5202, the screw cap 11 is abutted against the upper fixing screw hole 5201, the telescopic slot 521 is further pressed downwards along with the screw cap 11 which is screwed deeply, until the screw cap 11 is completely fitted in the upper fixing screw hole 5201, the gap of the telescopic slot 521 does not change, at the same time, the dent on the lower surface of the screw cap 11 presses and fixes the third rod 23 of the connecting rod 2 through the cross hole 523, then another locking screw 1 is inserted into another fixing screw hole 520 which is adjacently arranged, the screwing process of the screws is repeated, thereby the screw holes on other positions on the surface of the special-shaped block 5 are sequentially fixed, so that the locking screw 1 is completely engaged and fixed with the special-shaped block 5 and the connecting rod 2 at one end of the fractured bone, the fixing tool for the end fixing block 4 is that after the locking screw 1 is inserted from the upper fixing screw hole 411 and the lower fixing screw hole 412 of the end fixing block 4, the quincunx mounting hole on the upper surface of the screw cap 11 is screwed by using a tool, the nail head 14 drives the self-tapping blade 141 to cut the bone under the driving of the screw cap 11, and drives the lower screw-threaded part 13 to be screwed into the bone of the fracture part by a single thread, meanwhile, the upper screw-connection portion 12 passes through the upper fixing screw-connection hole 411 and then enters the lower fixing screw-connection hole 412, the double-thread of the upper screw-connection portion 12 is screwed with the fastening thread in the lower fixing screw-connection hole 412, the screw cap 11 abuts against the upper fixing screw-connection hole 411, the compression slit 47 is further pressed downwards along with the screwing going deep into the screw cap 11 until the screw cap 11 is completely fitted in the upper fixing screw-connection hole 411, the gap of the compression slit 47 is not changed any more, at the same time, the dent on the lower surface of the screw cap 11 presses and fixes the third rod 23 of the connecting rod 2 through the cross hole 46, so that the locking screw 1 is completely engaged with the end fixing block 4 and the connecting rod 2 and fixed at the other end of the fractured bone.

The closed locking device is completely fixed on the bone of the fracture part through the steps.

It should be noted that, in the above embodiment, when the special-shaped blocks 5 and the end fixing blocks 4 at the two ends of the fixing device are fixed, the locking nut that is put in advance needs to be removed and fixed by using the locking screw 1.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A closed locking device, characterized in that it comprises: the special-shaped block, the connecting rod, the fixing block, the locking screw and the end fixing block;

the locking screw includes: a screw cap, an upper screw joint part, a lower screw joint part and a nail head; the upper screw joint part is connected with the screw cap, the lower screw joint part is connected with the upper screw joint part, and the nail head is connected with the lower screw joint part;

the locking screw penetrates through the fixing hole of the end fixing block, the upper screwed part is screwed with the fixing hole, the screw cap abuts against the fixing hole, so that the connecting rod jack is extruded, and a third rod body of the connecting rod inserted in the connecting rod jack is tightly connected with the connecting rod jack.

2. The closed locking device according to claim 1, wherein at least one of the pressurizing screw hole, the inclined insertion pressurizing screw hole and the positioning hole is provided in the first fixing portion.

3. The locking device according to claim 1, characterized in that said fixing screw holes comprise in particular: an upper fixing screw hole and a lower fixing screw hole;

the upper fixing screw hole is positioned on the upper surface of the second fixing part, and the hole wall of the upper fixing screw hole is a smooth curved surface and is used for abutting against the screw cap of the locking screw;

the lower fixing screw hole is positioned on the lower surface of the second fixing part, and the hole wall of the lower fixing screw hole is provided with a fastening thread for being in threaded connection with the upper threaded part of the locking screw; the aperture of the upper fixing screw hole is larger than that of the lower fixing screw hole.

4. The closed locking apparatus according to claim 1, wherein the connecting rod coupling screw holes are located at a side of the second fixing portion, and two of the connecting rod coupling screw holes are symmetrically or asymmetrically provided at both sides of the fixing screw holes.

5. The closed locking device according to claim 1, wherein the connecting rod further comprises a groove;

the grooves are arranged on the surface of the connecting rod at equal intervals, the interval between every two adjacent grooves is 0.35-0.4 mm, and the distance between the center lines of the two adjacent grooves is 1.14-1.57 mm.

6. The closed locking device according to claim 1, wherein the fixing block further comprises: an upper edge portion and a lower edge portion;

the lower edge part is positioned at the lower end of the fixed block and comprises a lower fixed screw hole.

7. The hermetic-type locking apparatus according to claim 6, wherein a side opening is opened between the upper edge portion and the lower edge portion, and a gap of the side opening is adjusted by the locking screw.

8. The closed locking device according to claim 1, characterized in that the fixing hole comprises in particular: an upper fixing hole and a lower fixing hole;

9. The closed locking device according to claim 1, characterized in that the connecting rod receptacle comprises in particular: a first connecting rod jack and a second connecting rod jack;

the first connecting rod jack and the second connecting rod jack are symmetrically or asymmetrically arranged at two sides of the fixing hole; the diameters of the first connecting rod jack and the second connecting rod jack are equal or unequal, and the diameters of the first connecting rod jack and the second connecting rod jack are matched with the diameters of the connecting rods.

10. The closed locking device of claim 1, wherein the tip anchor block further comprises: a first side opening, a second side opening and an extrusion hole;

the extrusion hole is positioned in the upper fixing hole and is formed by the intersection of the first connecting rod jack and the second connecting rod jack with the upper fixing hole respectively.