External fixation support for orthopedics department

Abstract

The utility model discloses an orthopaedic external fixation support, which belongs to the field of medical instruments, and is provided with a connecting rod, a universal joint and a needle rod clamp, one end of the connecting rod is provided with a ball head, the other end of the connecting rod is provided with a screw rod, the needle rod clamp is provided with a screw rod hole, the screw rod hole is screwed on the screw rod, and the universal joint is arranged on the needle rod clamp. The screw rod is rotated to enable the needle rod clamp to move in the axial direction of the screw rod, the universal joint is provided with a connecting sleeve, the connecting sleeve restrains the ball heads of the two connecting rods in the sleeve, the screw rods of the two connecting rods penetrate out of the two ends of the connecting sleeve in the left-right direction respectively, the universal joint is provided with a locking mechanism, and the locking mechanism is arranged between the two ball heads. And the locking mechanism is matched with the connecting sleeve to lock or loosen the two ball heads. During use, after one connecting rod is fixed, the other connecting rod can swing in any direction within a certain angle, and after swinging to a required position, the other connecting rod is locked and fixed by the locking mechanism.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to an orthopedic external fixation bracket. Background Art

[0002] In recent years, the number of patients with high-energy open fractures has tended to increase. Since the treatment of open fractures is prone to infection and necrosis, open fractures must be treated quickly to minimize further damage to the tissue.

[0003] Following the principle of simple, rapid and effective fixation of fractures, external fixator technology is widely used in the treatment of fractures. External fixators usually include connecting rods and universal joints to fix the fracture site. The connecting rod can prevent the fracture site from bending, and the universal joint can connect two adjacent connecting rods. During surgery, a support structure is set at the fracture site to fix the fracture site.

[0004] Although the external fixators currently on the market are composed of connecting rods and universal joints, their fixation firmness and fracture fixation speed still need to be improved. For example, an orthopedic external fixator disclosed in application number CN202120686169.2 has complete functions but a complex structure, and the adjustment and fixation of the needle position and angle during use are cumbersome. Utility Model Content

[0005] The utility model discloses an orthopedic external fixation bracket, which overcomes the above-mentioned defects.

[0006] The orthopedic external fixation bracket is provided with a connecting rod, a universal joint and a needle rod clamp. One end of the connecting rod is provided with a ball head and the other end is provided with a screw. The needle rod clamp is provided with a screw hole, and the screw hole is screwed on the screw. The screw is rotated to make the needle rod clamp move along the axial direction of the screw. The universal joint is provided with a connecting sleeve, and the connecting sleeve constrains the ball heads of the two connecting rods in the sleeve. The screws of the two connecting rods pass through the left and right directions of the two ends of the connecting sleeve respectively. A locking mechanism is provided between the two ball heads, and the locking mechanism cooperates with the connecting sleeve to lock or loosen the two ball heads. When in use, after one connecting rod is fixed, the other connecting rod can swing in any direction within a certain angle, and after swinging to the desired position, it is locked and fixed by the locking mechanism.

[0007] The locking mechanism is further provided with a ball socket block, one end face of the ball socket block is provided with a ball socket, the ball socket block is provided with two blocks, the two ball socket blocks are arranged in the sleeve, and the ball sockets are respectively matched with the ball heads of the two connecting rods, a lock core is provided between the two ball socket blocks, the lock core is provided with a left wedge block and a right wedge block, the joint surface of the left wedge block and the right wedge block is an inclined surface, the left wedge block and the right wedge block are tightened together along the up and down directions by bolts, and when tightened, the left wedge block and the right wedge block slide along the inclined surface and rubbed apart to the left and right directions respectively, squeezing the two ball socket blocks, and at the same time, the two ball socket blocks respectively cooperate with the left and right walls of the sleeve to squeeze and lock the two ball heads.

[0008] Furthermore, the right wedge block is provided with an oblong hole penetrating from top to bottom, and the left wedge block is provided with a threaded hole matched with the bolt.

[0009] Furthermore, the right wedge block is integrated with the adjacent ball and socket pad.

[0010] Furthermore, the surface of the screw is provided with a groove along the axial direction of the screw, and the groove is provided with two grooves and is symmetrically arranged on the surface of the screw. A locking block is provided in the groove. When the operation enters the locking stage of the fixed frame, the locking block is inserted into the screw hole of the needle rod clamp and cuts into the threaded tooth surface of the screw hole to lock the needle rod clamp and the screw into one.

[0011] Furthermore, a nut is provided at the rear end of the locking block, and the nut is screwed onto the screw rod to press the locking block and prevent the locking block from retreating.

[0012] Furthermore, the locking block is configured in a wedge shape, with the front end of the wedge being immersed in the groove and the rear end protruding out of the groove.

[0013] Furthermore, the needle rod clamp is provided with a universal locking hole, the universal locking hole is arranged on both sides of the screw hole, a universal ring is arranged in the universal locking hole, the universal ring is provided with a tapered threaded hole, and the universal ring is provided with an opening.

[0014] Furthermore, a locking bone screw is provided in the tapered threaded hole.

[0015] Furthermore, the needle bar clamp is provided with a locking screw.

[0016] Furthermore, the needle bar clamp is provided with a locking cam.

[0017] The up, down, left and right directional descriptions in the present invention are only for illustrating the relative positions between the components and are not specific orientations.

[0018] Beneficial effects: The utility model connects two connecting rods through a universal joint in the form of a ball joint, which is more flexible and convenient for auxiliary treatment of fractures near joints, especially the pressure locking method of a thread plus a wedge block is adopted to make the locking more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of an orthopedic external fixation bracket implementation method.

[0020] Figure 2 Schematic diagram of the connecting rod structure.

[0021] Figure 3 It is a structural schematic diagram of the ball and socket pad.

[0022] Figure 4 It is the structural diagram of the left wedge.

[0023] Figure 5 It is the structural diagram of the right wedge.

[0024] Figure 6 It is a schematic diagram of the structure of the lock block.

[0025] Figure 7 It is a structural schematic diagram of the universal ring.

[0026] Figure 8 It is a schematic diagram of the needle bar clamp structure with a locking screw.

[0027] Fig. 9 It is a schematic diagram of the needle bar clamp structure with a locking cam.

[0028] Explanation of the reference numerals: connecting rod 1, universal joint 2, needle rod clamp 3, locking block 4, nut 5, locking screw 6, locking cam 7, groove 11, connecting sleeve 21, ball and socket pad 22, left wedge block 23, right wedge block 24, bolt 25, universal locking hole 31, universal ring 32. DETAILED DESCRIPTION

[0029] Figure 1-Figure 10 The specific structure of an orthopedic external fixation bracket embodiment of the utility model is shown. The orthopedic external fixation bracket is provided with a connecting rod 1, a universal joint 2 and a needle bar clamp 3. The connecting rod 1 is provided with a ball head at one end and a screw at the other end. The needle bar clamp 3 is provided with a screw hole, which is screwed on the screw. The screw is rotated to make the needle bar clamp 3 move along the axial direction of the screw. The universal joint 2 is provided with a connecting sleeve 21, which constrains the ball heads of the two connecting rods 1 in the sleeve. The screws of the two connecting rods 1 pass through the left and right ends of the connecting sleeve 21 respectively. The universal joint 2 is provided with a locking mechanism, which is provided between the two ball heads. The locking mechanism cooperates with the connecting sleeve to lock the two ball heads. When in use, after one connecting rod 1 is fixed, the other connecting rod 1 can swing in any direction within a certain angle, and is locked and fixed by the locking mechanism after swinging to the desired position.

[0030] The locking mechanism is further provided with a ball and socket pad 22, one end face of which is provided with a ball socket, and the ball and socket pad 22 is provided with two pieces, the two ball and socket pads 22 are arranged in the connecting sleeve 21, and the ball sockets are respectively matched with the ball head of the connecting rod 1, and a lock core is provided between the two ball and socket pads 22, and the lock core is provided with a left wedge block 23 and a right wedge block 24, and the engaging surface of the left wedge block 23 and the right wedge block 24 is an inclined surface, and the left wedge block 23 and the right wedge block 24 are tightened together in the up and down directions by bolts 25, and when tightened, the left wedge block 23 and the right wedge block 24 slide along the inclined surface and move to the left and right directions to squeeze the two ball and socket pads 22 respectively, and at the same time, the two ball and socket pads 22 respectively cooperate with the left and right walls of the connecting sleeve 21 to squeeze and lock the ball head.

[0031] Furthermore, the right wedge block 24 is provided with an oblong hole penetrating from top to bottom, and the left wedge block 23 is provided with a threaded hole matched with the bolt 25 .

[0032] Furthermore, the right wedge block 24 is integrated with the adjacent ball and socket pad 22 .

[0033] Furthermore, a groove 11 is provided on the surface of the screw along the axial direction of the screw, and the groove 11 is provided with two grooves 11 and is symmetrically arranged on the surface of the screw. A locking block 4 is provided in the groove 11. When the operation enters the locking stage of the fixed frame, the locking block 4 is inserted into the screw hole of the needle bar clamp 3 and cuts into the threaded tooth surface of the screw hole to lock the needle bar clamp 3 and the connecting rod 1 into one.

[0034] Furthermore, a nut 5 is provided at the rear end of the locking block 4, and the nut 5 is screwed onto the screw rod to press the locking block 4 and prevent the locking block 4 from retreating.

[0035] Furthermore, the locking block 4 is configured to be wedge-shaped, with the front end of the wedge being immersed in the groove 11 and the rear end protruding out of the groove 11 .

[0036] Furthermore, the needle bar clamp 3 is provided with a universal locking hole 31, and the universal locking hole 31 is provided on both sides of the screw hole. A universal ring 32 is provided in the universal locking hole 31, and the universal ring 32 is provided with a tapered threaded hole, and the universal ring 32 is provided with an opening.

[0037] Furthermore, a locking bone screw is provided in the tapered threaded hole, and the locking bone screw is used to fix bones.

[0038] Furthermore, the needle bar clamp is provided with a locking screw 6.

[0039] Furthermore, the needle bar clamp is provided with a locking cam 7.

Claims

1. An orthopedic external fixation bracket, comprising a connecting rod (1), a universal joint (2) and a needle rod clamp (3), wherein one end of the connecting rod (1) is provided with a ball head and the other end is provided with a screw rod, the needle rod clamp (3) is provided with a screw rod hole, the screw rod hole is screwed onto the screw rod, the universal joint (2) is provided with a connecting sleeve (21), the connecting sleeve (21) constrains the ball heads of the two connecting rods (1) in the sleeve, the screw rods of the two connecting rods (1) pass through the left and right ends of the connecting sleeve (21), the universal joint (2) is provided with a locking mechanism, the locking mechanism is provided between the two ball heads, the locking mechanism cooperates with the connecting sleeve to lock the two ball heads, and is characterized in that: The locking mechanism is provided with a ball and socket pad (22), one end surface of the ball and socket pad (22) is provided with a ball socket, the ball and socket pad (22) is provided with two pieces, the two ball and socket pads (22) are provided in the connecting sleeve (21), the ball sockets are respectively provided in cooperation with the ball head of the connecting rod (1), a lock core is provided between the two ball and socket pads (22), the lock core is provided with a left wedge block (23) and a right wedge block (24), and the joint surface of the left wedge block (23) and the right wedge block (24) is an inclined surface. The left wedge block (23) is provided with an oblong hole extending through the upper and lower parts, and the right wedge block (24) is provided with a threaded hole. The left wedge block (23) and the right wedge block (24) are tightened together in the upper and lower directions by bolts (25). When tightened, the left wedge block (23) and the right wedge block (24) slide along the inclined surface and move in the left and right directions to squeeze the two ball socket pads (22). At the same time, the two ball socket pads (22) respectively cooperate with the left and right walls of the connecting sleeve (21) to squeeze and lock the ball head.

2. An orthopedic external fixator according to claim 1, characterized in that: The right wedge block (24) is integrated with the adjacent ball and socket pad (22).

3. The orthopedic external fixator according to claim 1, characterized in that: The surface of the screw is provided with a groove (11) along the axial direction of the screw, and the grooves (11) are provided with two grooves and are symmetrically arranged on the surface of the screw. A locking block (4) is provided in the groove (11), and the locking block (4) is inserted into the screw hole of the needle bar clamp (3) and cuts into the threaded surface of the screw hole, thereby locking the needle bar clamp (3) and the connecting rod (1) into one.

4. An orthopedic external fixator according to claim 3, characterized in that: A nut (5) is provided at the rear end of the locking block (4), and the nut (5) is screwed onto the screw rod and is used to press the locking block (4) and prevent the locking block (4) from retreating.

5. The orthopedic external fixator according to claim 3, characterized in that: The locking block (4) is configured to be wedge-shaped, with the front end of the wedge being submerged in the groove (11) and the rear end protruding out of the groove (11).

6. The orthopedic external fixator according to claim 1, characterized in that: The needle bar clamp (3) is provided with a universal locking hole (31), the universal locking hole (31) is provided on both sides of the screw rod hole, a universal ring (32) is provided in the universal locking hole (31), the universal ring (32) is provided with a tapered threaded hole, and the universal ring (32) is provided with an opening.

7. The orthopedic external fixator according to claim 1, characterized in that: The needle bar clamp is provided with a locking screw (6).

8. The orthopedic external fixator according to claim 1, characterized in that: The needle bar clamp is provided with a locking cam (7).

Images