CN213722329U

CN213722329U - Clamp for single-plane half-needle external fixator

Info

Publication number: CN213722329U
Application number: CN202021400023.9U
Authority: CN
Inventors: 李青中
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-07-20
Anticipated expiration: 2030-07-15

Abstract

The utility model provides a clamp for a uniplanar half-needle external fixator, which belongs to the field of external fixing devices. The aluminum cake clamping device comprises a circular clamping block and a rectangular clamping block, wherein the circular clamping block and the rectangular clamping block are connected through a rotary connector, the rectangular clamping block is located on the side face of the circular clamping block, clamping holes are formed in the rectangular clamping block and the circular clamping block, the rotary connector comprises an A face and a B face, the A face is provided with a rotating shaft A and a positioning hole A, the A face covers the top of the circular clamping block, the rotating shaft A is inserted into the circular clamping block, the top of the circular clamping block is provided with a cake-shaped groove, an aluminum cake A is adhered in the groove, and a positioning screw A penetrates through the positioning hole A of the A face to be matched with the aluminum cake A; can realize the adjustment of three-axis direction and increase the contact area with the connecting rod and the spicule.

Description

Clamp for single-plane half-needle external fixator

Technical Field

The utility model provides a clamp for a uniplanar half-needle external fixator, which belongs to the field of external fixing devices.

Background

When the arm bones and the leg bones of a human body are in violent collision, the arm bones and the leg bones can be broken, such as car accidents, extreme sports or high-altitude falling, and when the arm bones and the leg bones are broken, in order to improve the healing effect and speed, the broken surfaces are forcibly butted through surgical operations, so that the broken bones can be jointed as soon as possible. There are two ways of bone fusion in surgery, in vivo fixation and in vitro fixation of a fracture site. The in vivo fixation is to cut the plane of the wound, join the broken bones, and then install the alloy connecting plate on the bone through screws to realize the position fixation of the broken bones. The external fixation, the broken bone is jointed at the wound, the auxiliary wound opening surfaces are established on the skin and the muscle at the two ends of the wound, the bone nails are used for fixing the broken bone into the bones at the two ends of the wound, and the external fixator and the connecting rod are used for fixing the broken bone. Compared with two fixing technologies, the external fixation has the following advantages:

(1) the damage to the blood supply of the bone is less;

(2) the covering interference to soft tissues is less;

(3) the implant is not left, and the implant is not required to be cut and removed by a secondary operation;

(4) the pressurization and the extension can be adjusted at will;

(5) the operation is simple.

Because two spicules fixed into a bone are not necessarily parallel in practical operation, but the existing fixator can only realize biaxial movement in two directions, the compensation of the position and angle difference in the third direction is realized through the side clamp or the inclined clamp of the spicules and the connecting rod, but the contact area of the spicules and the connecting rod with the clamping pieces of the fixator is reduced by the side clamp and the inclined clamp, so that the connection is not firm.

SUMMERY OF THE UTILITY MODEL

The utility model provides a clamp that monoplane half needle external fixation ware was used can realize that the triaxial direction is adjusted, increase and the area of contact of connecting rod and spicule.

The utility model discloses a clamp that half needle external fixation ware in monoplane used, including a circular clamp splice and a rectangle clamp splice, circular clamp splice and rectangle clamp splice are connected through the rotary connector, the rectangle clamp splice is located the side of circular clamp splice, be equipped with the clip hole on rectangle clamp splice and the circular clamp splice, the rotary connector includes A face and B face, A face is equipped with pivot A and locating hole A, A face covers at circular clamp splice top, pivot A inserts circular clamp splice, circular clamp splice top is equipped with the cake shape recess, be stained with aluminium cake A in the recess, set screw A passes locating hole A and the cooperation of aluminium cake A of A face;

a round cake-shaped groove is formed in the surface B, an aluminum cake B is adhered in the round cake-shaped groove, a rotating shaft B is arranged on the rectangular clamping block, the rotating shaft B of the rectangular clamping block is inserted into the surface B, a positioning hole B is formed in the rectangular clamping block, and a positioning screw B penetrates through the positioning hole B to be matched with the aluminum cake B.

The clamp for the single-plane half-needle external fixator comprises a circular clamping block, a clamping block and a clamping block, wherein the circular clamping block is divided into a cake-shaped upper part and a cake-shaped lower part; perforation A includes rotating part and fixed part, and the fixed part diameter is greater than the rotating part to communicate in the rotating part below, pivot A inserts and is equipped with connecting screw in the rotating part perforation A, connecting screw's screw rod screw in connecting portion, and the screwhead card is equipped with the arc recess on the opposite face of upper portion and lower part in the fixed part, and two arc recesses are combined together and are formed the double-layered hole.

The clamp for the single-plane half-needle external fixator is characterized in that the rectangular clamping block is divided into the inside of a rectangle and the outside of the rectangle, screw holes are formed in the outside and the inside, screws are screwed into the screw holes in the inside and the outside to connect the screw holes in the inside and the outside together, the outside is connected to the outside in the inside and the center of a circle coaxially, a rotating shaft B is arranged on one side of the inside, which faces the surface B, the rotating shaft B is inserted into the surface B, and the positioning holes B penetrate through the outside and the inside.

The clamp for the single-plane half-needle external fixator comprises a surface A and a surface B, wherein the surface A comprises an arc part and a rectangular part, the arc part is concentric with the circular clamping block and has the same radius, the rectangular part is connected with the arc part, and the length L of the rectangular part is the same as the radius r of the arc part.

The clamp for the single-plane half-needle external fixator is characterized in that the rectangular clamping block is connected with the B surface in the same size, the central point of the connecting surface of the B surface is correspondingly connected, a through hole B is formed in the central point of the B surface, a rotating shaft B is located in the central point of the inner side surface, the through hole B comprises a rotating part and a fixing part, the diameter of the fixing part is larger than that of the rotating part and is communicated with the lower part of the rotating part, the rotating shaft B is inserted into the through hole B of the rotating part and is internally provided with a connecting screw, a screw rod of the connecting screw is screwed into the connecting part, and a screw head is clamped in the fixing part.

Compared with the prior art, the utility model beneficial effect does:

the clamp that single plane half needle external fixation ware used, can realize the motion of triaxial direction, do not need circular clamp splice and rectangle clamp splice to the oblique clamp of spicule and connecting rod or press from both sides partially, can realize two this application the central line collineation in the double-layered hole of rectangle clamp splice of fixer, press from both sides downthehole wall simultaneously and be the cambered surface, the area of contact of increase circular clamp splice and rectangle clamp splice and spicule and connecting rod that can be great, great improvement is connected stability.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a cross-sectional view of fig. 1.

In the figure: 1. a rotating connector; 2. an aluminum cake A; 3. a positioning screw A; 4. a connecting screw B; 5. an aluminum cake B; 6. a screw B; 7. a rectangular clamping block; 8. a clamping hole B; 9. an exterior; 10. an inner portion; 11. a rotating shaft B; 12. an upper portion; 13. a rotating shaft A; 14. a connecting screw A; 15. a fixed part; 16. a screw A; 17. a lower portion; 18. a circular clamping block; 19. a set screw B; 20. a through hole; 21. b surface; 23. surface A; 24. a rotating part; 25. and (4) clamping the hole A.

Detailed Description

The following is combined with the utility model to further explain the embodiment of the utility model:

example 1: as shown in fig. 1, 2 and 3, the clamp for the single-plane half-needle external fixator of the present invention includes a circular clamping block 18 and a rectangular clamping block 7, the circular clamping block 18 and the rectangular clamping block 7 are connected by a rotary connector 1, the rectangular clamping block 7 is located at the side of the circular clamping block 18, the rectangular clamping block 7 and the circular clamping block 18 are respectively provided with a clamping hole a25 and a clamping hole B8, the rotary connector 1 includes an a surface 23 and a B surface 21, the a surface 23 is provided with a rotating shaft a13 and a positioning hole a, the a surface 23 covers the top of the circular clamping block 18, the rotating shaft a13 is inserted into the circular clamping block 18, the top of the circular clamping block 18 is provided with a circular cake-shaped groove, the groove is adhered with an aluminum cake a2, and a positioning screw A3 passes through the positioning hole a of the a surface 23 to be matched with the aluminum cake a 2; the positioning screw A3 selects metal with strength greater than that of aluminum, such as a steel self-tapping screw, the diameter of the screw rod of the positioning screw A3 corresponds to the positioning hole, and after the position is found, the positioning screw is forcibly tapped into the aluminum cake A2, so that hard link between the positioning screw A3 and the aluminum cake A2 is realized, and the relative position between the rotary connector 1 and the circular clamping block 18 is also limited.

The B surface 21 is provided with a round cake-shaped groove, an aluminum cake B5 is adhered in the round cake-shaped groove, the rectangular clamping block 7 is provided with a rotating shaft B11, the rotating shaft B11 of the rectangular clamping block 7 is inserted into the B surface 21, the rectangular clamping block 7 is provided with a positioning hole B, and a positioning screw B19 penetrates through the positioning hole B to be matched with the aluminum cake B5.

The clamp for the single-plane half-needle external fixator comprises a circular clamping block 18, a clamping head and a clamping head, wherein the circular clamping block is divided into a cake-shaped upper part 12 and a cake-shaped lower part 17, a cake-shaped groove is positioned at the top of the upper part 12, a screw hole is formed below the upper part 12, the lower part 17 is provided with a screw hole penetrating through the lower part 17, a screw A16 is screwed into the screw hole of the upper part 12 and the screw hole of the lower part 17 to connect the upper part 12 and the lower part 17 together, the upper part 12 is connected above the lower part 17, the center of the circle is coaxial, the upper part 12 is provided with a through hole A penetrating through the upper part 12, and the through hole A is concentric with the upper part 12; the through hole A comprises a rotating part 24 and a fixing part 15, the diameter of the fixing part 15 is larger than that of the rotating part 24 and is communicated with the lower part of the rotating part 24, a rotating shaft A13 is inserted into the through hole A of the rotating part 24 and is internally provided with a connecting screw A14, the screw rod of the connecting screw A14 is screwed into the rotating shaft A13 in the connecting part to form connection, the head of the connecting screw A14 is clamped in the fixing part 15, the opposite surfaces of the upper part 12 and the lower part 17 are provided with arc-shaped grooves, and the two arc-shaped grooves are combined together to form a clamping hole A25. The center of the aluminum cake A2 is provided with a through hole 20 communicated with the through hole A, and the supply rotating shaft A13 penetrates through the through hole.

According to the clamp for the single-plane half-needle external fixator, the rectangular clamping block 7 is divided into the rectangular inner portion 10 and the rectangular outer portion 9, the outer portion 9 and the inner portion 10 are both provided with screw holes, a screw B6 is screwed into the screw holes of the inner portion 10 and the outer portion 9 to connect the screw holes of the inner portion 10 and the screw holes of the outer portion 9 together, the outer portion 9 is connected to the outer side of the inner portion 10, the circle center of the outer portion is coaxial, a rotating shaft B11 is arranged on one side, facing the B face 21, of the inner portion 10, the rotating shaft B11 is inserted into the B face 21, and the positioning hole B penetrates through the outer portion 9 and the inner portion 10.

The clamp for the single-plane half-needle external fixator comprises an A surface and a B surface, wherein the A surface comprises an arc part and a rectangular part, the arc part is concentric with the circular clamping block 18 and has the same radius, the rectangular part is connected with the arc part together, and the length l of the rectangular part is the same as the radius r of the arc part.

The clamp for the single-plane half-needle external fixator comprises a rectangular clamping block 7, a B surface 21, a rotating part 24 and a fixing part 15, wherein the connecting surface of the rectangular clamping block 7 is the same in size and the central point of the B surface 21 is correspondingly connected, a through hole B is formed in the central point of the B surface 21, the rotating shaft B11 is located in the central point of the side surface of the inner part 10, the through hole B comprises the rotating part 24 and the fixing part 15, the diameter of the fixing part 15 is larger than that of the rotating part 24 and is communicated with the lower part of the rotating part 24, a rotating shaft B11 is inserted into the through hole B of the rotating part 24 and is internally provided with a connecting screw B4, a screw of the connecting screw B4 is screwed into the connecting part, and the head of the connecting screw B4 is clamped in the fixing part 15.

When the clamp for the single-plane half-needle external fixator is used for fixing broken bones of an arm bone and a leg bone in vitro, the bone needles are fixed into two ends of a bone breakpoint, and the bone breakpoint is jointed and temporarily fixed by using an auxiliary instrument. Two spicules are inserted into the clip holes A25 of the rectangular clip block 7, the outer part 9 and the inner part 10 are close to each other by screwing the screw, the clip holes A25 clamp the spicules, and the clip holes A25 can firmly clamp the spicules due to the fact that the extension direction of the clip holes A25 is the same as that of the spicules, and the clip holes A25 are arc-shaped, and the very large contact area can be achieved.

At this time, the rectangular clamping block 7 is fixed relative to the spicules, the connector 1 and the circular clamping block 18 are rotated by taking the rotating shaft A13 and the rotating shaft B11 as axes, the central lines of clamping holes A25 of the two circular clamping blocks 18 of the application which are installed on the two spicules are collinear, two ends of the connecting rod are inserted into clamping holes B8 of the two circular clamping blocks 18, the upper portion 12 and the lower portion 17 are close to each other by screwing a screw, the connecting rod is clamped by the clamping holes, and the connecting rod can be firmly clamped by the clamping holes B8 due to the fact that the extending direction of the clamping holes B8 is the same as that of the connecting rod and the clamping holes B8 are arc-shaped, and the connecting rod can be firmly clamped by the clamping holes B8 due to the very large contact area. Side and offset clamping of the spicules and the connecting rods is avoided. After the connecting rod is fixed in the clamping hole B8, the positioning screw A3 and the positioning screw B19 are respectively screwed into the aluminum cake A2 and the aluminum cake B5, so that the rotating block and the rectangular clamping block 7 are limited and cannot rotate, and a stable external 9 fixing structure is formed. The stable connection of the clamping holes A25 and the clamping holes B8 of the rectangular fixing block and the circular fixing block to the spicules and the connecting rod respectively is guaranteed, and the rotation of the connecting block and the circular fixing block when the spicules are not parallel is realized through a three-axis rotating structure, so that the clamping holes A25 of the circular fixing blocks on the two spicules are collinear, and the connecting rod is supplied to penetrate into the connecting holes for connection.

Claims

1. The clamp for the single-plane half-needle external fixator is characterized by comprising a circular clamping block (18) and a rectangular clamping block (7), wherein the circular clamping block (18) and the rectangular clamping block (7) are connected through a rotary connector (1), the rectangular clamping block (7) is positioned on the side surface of the circular clamping block (18), clamping holes are formed in the rectangular clamping block (7) and the circular clamping block (18), the rotary connector (1) comprises an A surface (23) and a B surface (21), the A surface (23) is provided with a rotating shaft A (13) and a positioning hole A, the A surface (23) covers the top of the circular clamping block (18), the rotating shaft A (13) is inserted into the circular clamping block (18), a circular cake-shaped groove is formed in the top of the circular clamping block (18), an aluminum cake A (2) is adhered in the groove, and a positioning screw A (3) penetrates through the positioning hole A of the A surface (23) to be matched with the aluminum cake A (2);

a round cake-shaped groove is formed in the surface B (21), an aluminum cake B (5) is adhered in the round cake-shaped groove, a rotating shaft B (11) is arranged on the rectangular clamping block (7), the rotating shaft B (11) of the rectangular clamping block (7) is inserted into the surface B (21), a positioning hole B is formed in the rectangular clamping block (7), and a positioning screw B (19) penetrates through the positioning hole B to be matched with the aluminum cake B (5).

2. The clamp for the external fixator of the single-plane half needle according to claim 1, wherein the circular clamping block (18) is divided into a cake-shaped upper part (12) and a cake-shaped lower part (17), the cake-shaped groove is positioned at the top of the upper part (12), a screw hole is arranged below the upper part (12), the lower part (17) is provided with a screw hole for penetrating the lower part (17), a screw A (16) is screwed into the screw hole of the upper part (12) and the lower part (17) to connect the upper part (12) and the lower part (17), the upper part (12) is connected above the lower part (17) and has a coaxial center, the upper part (12) is provided with a through hole A for penetrating the upper part (12), and the through hole A is concentric with the upper part (12); the perforation A comprises a rotating part (24) and a fixing part (15), the diameter of the fixing part (15) is larger than that of the rotating part (24) and is communicated with the lower part of the rotating part (24), a rotating shaft A (13) is inserted into the perforation A of the rotating part (24) and is internally provided with a connecting screw A (14), a screw of the connecting screw A (14) is screwed into the connecting part, a screw head is clamped in the fixing part (15), arc-shaped grooves are arranged on opposite surfaces of the upper part (12) and the lower part (17), and the two arc-shaped grooves are combined together to form a clamping hole.

3. The clamp for the single-plane half-needle external fixator according to claim 2 is characterized in that the rectangular clamping block (7) is divided into a rectangular inner part (10) and a rectangular outer part (9), both the outer part (9) and the inner part (10) are provided with screw holes, a screw B (6) is screwed into the screw holes of the inner part (10) and the outer part (9) to connect the screw holes of the inner part (10) and the outer part (9) together, the outer part (9) is connected to the outer side of the inner part (10) and has a coaxial circle center, one side of the inner part (10) facing to the surface B (21) is provided with a rotating shaft B (11), the rotating shaft B (11) is inserted into the surface B (21), and a positioning hole B penetrates through the outer part (9) and the inner part (10).

4. The clamp for a uniplanar half-needle external fixator according to claim 3, wherein the A face comprises a circular arc portion concentric with the circular clamping block (18) and having the same radius, and a rectangular portion connected with the circular arc portion and having the same length L as the radius r of the circular arc portion.

5. The clamp for the external fixator with single-plane and half-needle according to claim 4, wherein the rectangular clamping block (7) has the same size with the connecting surface of the B-surface (21) and the central point is correspondingly connected, a through hole B is arranged at the central point of the B-surface (21), the rotating shaft B (11) is positioned at the central point of the side surface of the inner part (10), the through hole B comprises a rotating part of the through hole B and a fixed part of the through hole B, the diameter of the fixed part of the through hole B is larger than that of the rotating part of the through hole B and is communicated below the rotating part of the through hole B, the rotating shaft B (11) is inserted into the through hole B, the connecting screw B is arranged in the through hole B of the rotating part of the through hole B, the screw rod of the connecting screw B is screwed into the connecting part, and the screw head is clamped in the fixed part of the through hole B.