Universal adjustable bone hook with large angle

Abstract

The present application relates to the technical field of medical apparatus and instruments, and relates to a large-angle universal interchangeable adjustable bone hook. The bone hook cap, the ball head rod, the bone hook base, the pin shaft, the stop block, the bone hook rod and the bone hook claw are provided. The upper end of the ball head rod is matched with the spherical groove of the bone hook cap. The lower end of the bone hook cap is provided with four arc surface grooves which are communicated with the spherical groove. The lower end of the ball head rod is fixed to the upper end of the bone hook base. The middle part of the bone hook base is provided with a spherical groove. The two sides of the bone hook base are provided with sliding grooves one which are communicated with the spherical groove. The bone hook base is provided with sliding grooves two which are perpendicular to the sliding grooves one and are communicated. The ball head of the top of the bone hook rod is matched with the spherical groove. The stop block is slidably arranged in the sliding grooves one. The pin shaft is elastically and slidably arranged in the sliding grooves two. The pin shaft is connected with the stop block. The bone hook claw is sleeved on the bone hook rod and is connected through tooth matching. The bone hook rod is provided with an adjusting assembly.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and specifically to a large-angle universal interchangeable adjustable bone hook. Background Technology

[0002] When vertebral deformities occur, the goal is to restore the anatomical position, sequence, and physiological curvature of the vertebrae, while also bearing some or all of the physiological load. Specifically, this is achieved through posterior surgery by inserting pedicle screws into the vertebral bodies via the pedicles of the thoracic and lumbar vertebrae. Manipulation of the pedicle screws allows for the opening, compression, lifting, and repositioning of the vertebrae, thereby restoring the anatomical position, sequence, and physiological curvature of the spine. However, for some patients, pedicle screws cannot be inserted at certain locations, necessitating the use of bone hooks for fixation. Especially in the orthopedic procedures for adolescents and children, whose pedicles are much smaller than those of adults, the smaller angle of the bone hook, its fixed angle, and the inability to adjust its length are drawbacks. Clinically, it is difficult to provide bone hooks that meet the needs of such surgeries, making it challenging for surgeons to find suitable positions for fixation during surgery, and even leading to risks such as postoperative bone slippage.

[0003] In summary, to address the shortcomings of existing technologies, it is necessary to design a large-angle, universally interchangeable, adjustable bone hook that can adapt to different anatomical vertebrae. Summary of the Invention

[0004] To address the problems of existing technologies, this invention provides a large-angle universal interchangeable adjustable bone hook.

[0005] The objective of this invention can be achieved through the following technical solution: A large-angle universal interchangeable adjustable bone hook includes: a bone hook cap, a ball head rod, a bone hook seat, a pin, a stop block, a bone hook rod, and a bone hook claw. The upper spherical surface of the ball head rod fits into the spherical groove of the bone hook cap. The lower end of the bone hook cap is provided with four arc-shaped grooves communicating with the spherical grooves. The lower end of the ball head rod is fixed to the upper end of the bone hook seat. The bone hook seat is provided with a ball groove at intervals in the middle. The two sides of the bone hook seat are provided with a sliding groove I communicating with the ball groove. The bone hook seat is provided with a sliding groove II perpendicular to and communicating with the sliding groove I. The ball head at the top of the bone hook rod is matched and set in the ball groove. The stop block is slidably set in the sliding groove I. The pin is elastically slidably set in the sliding groove II. The pin and the stop block are snapped together. The bone hook claw is sleeved on the bone hook rod and connected by a toothed engagement. An adjustment component is provided on the bone hook rod.

[0006] In a further improvement, a retaining ring is threaded to the top of the ball head rod, and protrusions are provided on both sides of the upper end of the retaining ring. A groove matching the protrusions is provided on the inner side of the bone hook cap.

[0007] In a further improvement, the lower end of the ball head is threaded into a threaded hole at the top of the bone hook seat, and a pin is inserted through the threaded hole and the bottom end of the ball head.

[0008] In a further improvement, the ball groove is provided in three sets at intervals, the cross section of the first slide groove is an inverted trapezoidal structure, the pin includes a round rod part and a snap-fit ​​part, the snap-fit ​​part is spaced apart at the lower end of the round rod part, a spring is provided on the bottom right side of the second slide groove, the pin is provided at the left end of the spring and the left end of the pin is located outside the second slide groove, and the stop block is provided with a groove that matches the snap-fit ​​part.

[0009] In a further improvement, the stop block is I-shaped, circular, or other shapes, the upper end of the stop block is slidably disposed in a groove, the lower end of the stop block is located at the lower end of the bone hook seat, and the inner side of the stop block is provided with a hemispherical groove that matches the ball head.

[0010] In a further improvement, the bone hook claw has a vertical groove in the middle, and the inner end face of the vertical groove has a symmetrically arranged reverse tooth groove. The vertical groove has a through groove three on both sides. The adjustment component includes a hollow square rod and a reverse tooth spring. The hollow square rod is slidably disposed in the vertical groove. The hollow square rod has a hollow groove in the middle and a hollow side groove communicating with the hollow groove. The reverse tooth spring is fixed in the hollow side groove. The lower end of the reverse tooth spring has a reverse tooth matching the reverse tooth groove. The end of the reverse tooth spring has a pressing rod. The pressing rod passes through the three grooves and extends outward.

[0011] Compared with existing technologies, the beneficial effects of the large-angle universal interchangeable adjustable bone hook of the present invention are as follows:

[0012] 1. The bone hook and bone hook cap can achieve a large omnidirectional oscillation angle;

[0013] 2. The bone hook body can rotate in all directions, allowing for better contact with the spinous process;

[0014] 3. The bone hook body and bone hook are detachable, making it easy to replace different models and specifications of bone hook bodies to adapt to different spinous process sizes;

[0015] 4. The bone hook body can be extended and locked. Select a suitable position to hook onto the spinous process to lock the bone hook in place, preventing it from slipping out.

[0016] 5. Bone hooks can simultaneously hook and pull the lamina, pedicle, and ribs, providing stronger fixation during spinal deformity surgery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the exploded view of the present invention.

[0019] Figure 3 This is a structural schematic diagram of a cross-sectional view of the present invention.

[0020] Figure 4 This is a structural schematic diagram of the second sectional view of the present invention.

[0021] Figure 5 This is a schematic diagram of the bottom surface of the bone hook cap in this invention.

[0022] Figure 6 This is a schematic diagram of a partial location in the present invention.

[0023] Figure 7 This is a schematic diagram of the bone hook seat in the present invention.

[0024] In the diagram, 1-bone hook cap, 11-spherical groove, 12-arc groove, 13-slot, 2-retaining ring, 21-protrusion, 3-ball head rod, 4-bone hook seat, 41-ball groove, 42-slide groove one, 43-slide groove two, 44-threaded hole, 45-pin, 46-spring, 5-pin shaft, 51-round rod part, 52-slotted part, 6-stop block, 61-groove, 62-hemispherical groove, 7-bone hook rod, 71-ball head, 72-hollow square rod, 721-hollow groove, 722-hollow side groove, 73-reverse tooth spring, 731-reverse tooth, 74-pressing rod, 8-bone hook claw, 81-vertical slide groove, 82-reverse tooth groove, 83-slide groove three. Detailed Implementation

[0025] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] The following is a description of the embodiments and appendices. Figures 1-7 The technical solution of the present invention will be further described below.

[0028] Example 1

[0029] A large-angle universal interchangeable adjustable bone hook includes: a bone hook cap 1, a ball head rod 3, a bone hook seat 4, a pin 5, a stop block 6, a bone hook rod 7, and a bone hook claw 8. The upper spherical surface of the ball head rod 3 fits into the spherical groove 11 of the bone hook cap 1. The lower end of the bone hook cap 1 is provided with four arcuate grooves 12 communicating with the spherical grooves 11. The lower end of the ball head rod 3 is fixed to the upper end of the bone hook seat 4. The bone hook seat 4 is provided with ball grooves 41 spaced apart in the middle, and the two sides of the bone hook seat 4 are provided with ball grooves. The bone hook seat 4 has a through-slide groove 42, and a second slide groove 43 is provided in the bone hook seat 4 that is perpendicular to and connected to the first slide groove 42. The ball head 71 at the top of the bone hook rod 7 is matched and set in the ball groove 41. The stop block 6 is slidably set in the first slide groove 42. The pin shaft 5 is elastically slidably set in the second slide groove 43. The pin shaft 5 is snapped and connected to the stop block 6. The bone hook claw 8 is sleeved on the bone hook rod 7 and connected by a toothed engagement. The bone hook rod 7 is provided with an adjustment component.

[0030] like Figures 1 to 7 As shown, the operating principle of this invention is as follows:

[0031] The bone hook is formed by combining the bone hook cap 1, ball head rod 3, bone hook seat 4, pin 5, stop block 6, bone hook rod 7 and bone hook claw 8; the bone hook body is formed by combining the bone hook rod 7 and bone hook claw 8.

[0032] The upper threaded structure of the bone hook cap 1 allows a rod to be inserted and tightened by a screw plug. The lower part of the bone hook cap 1 makes ball contact with the ball head rod 3. The four evenly distributed arc grooves 12 at the bottom of the bone hook cap 1 allow the ball head rod 3 to swing at a large angle. By pushing the pin 5 to the right, it slides in the second sliding groove 43 and disengages from the stop block 6, making the ball head 71 at the top of the bone hook rod 7 make contact with the ball groove 41 of the bone hook seat 4. After pushing the stop block 6 into the first sliding groove 42, the inner side of the stop block 6 makes contact with the ball head 71. The pin 5 elastically rebounds and engages with the stop block 6, thereby locking the ball head 71 at the top of the bone hook rod 7 and the stop block 6 in the bone hook seat 4. Finally, the position of the bone hook claw 8 on the bone hook rod 7 is adjusted by the adjusting component.

[0033] The present invention has the following advantages:

[0034] Firstly, the large-angle universal interchangeable adjustable bone hook of the present invention can adjust the angle of the bone hook during surgery, realize the universal rotation of the bone hook body, and adjust the length of the hook body. It can lock and adjust the bone hook, and allow the bone hook claw to obtain a large swing space.

[0035] Secondly, the large-angle universal interchangeable adjustable bone hook of the present invention can realize the interchangeability of the bone hook body.

[0036] Thirdly, the large-angle universal interchangeable adjustable bone hook of the present invention can realize bidirectional movement of the bone hook rod and bone hook claw.

[0037] Fourthly, the large-angle universal interchangeable adjustable bone hook of the present invention can simultaneously hook and pull the lamina, pedicle, and rib positions, providing stronger fixation in spinal deformity surgery.

[0038] Fifthly, the large-angle universal interchangeable adjustable bone hook of the present invention can achieve a large angle between the bone hook and the bone hook cap.

[0039] As a further preferred embodiment, the ball head rod 3 is threadedly connected to a retaining ring 2 at its top. The retaining ring 2 has protrusions 21 on both sides of its upper end. The inner side of the bone hook cap 1 has a groove 13 that matches the protrusions 21. After the retaining ring 2 is connected to the ball head rod 3, it is inserted into the bone hook cap 1 so that the protrusions 21 correspond to the grooves 13. The retaining ring 2 is used to press and prevent the ball head rod 3 from coming out.

[0040] As a further preferred embodiment, the lower end of the ball head rod 3 is threaded into the threaded hole 44 at the top of the bone hook seat 4, and a pin 45 is inserted through the threaded hole 44 and the bottom end of the ball head rod 3 to increase the connection strength between the ball head rod 3 and the bone hook seat 4.

[0041] As a further preferred embodiment, the ball groove 41 is provided in three sets at intervals; the cross-section of the first slide groove 42 is an inverted trapezoidal structure; the pin 5 includes a round rod portion 51 and a locking portion 52, the locking portion 52 being spaced apart at the lower end of the round rod portion 51; a spring 46 is provided on the bottom right side of the second slide groove 43; the pin 5 is located at the left end of the spring 46, and the left end of the pin 5 is located outside the second slide groove 43; the stop block 6 is provided with a groove 61 that matches the locking portion 52. Figure 2 and Figure 3 As shown, the engagement of the round rod portion 51 and the snap-fit ​​portion 52 allows the pin 5 to slide only within the slide groove 42, ensuring that the snap-fit ​​portion 52 and the groove 61 can always be smoothly engaged.

[0042] As a further preferred embodiment, the stop block 6 is I-shaped, circular, or other shapes. The upper end of the stop block 6 is slidably disposed in the sliding groove 42, and the lower end of the stop block 6 is located at the lower end of the bone hook seat 4. The inner side of the stop block 6 is provided with a hemispherical groove 62 that matches the ball head 71. The I-shaped stop block 6 moves more stably in the sliding groove 42, and the hemispherical groove 62 and the ball head 71 make their spherical surfaces contact each other.

[0043] As a further preferred embodiment, the bone hook claw 8 has a vertical groove 81 in the middle, and a reverse tooth groove 82 is symmetrically arranged on the inner end face of the vertical groove 81. The vertical groove 81 has through grooves 83 on both sides. The adjustment component includes a hollow square rod 72 and a reverse tooth spring 73. The hollow square rod 72 is slidably disposed in the vertical groove 81. The hollow square rod 72 has a hollow groove 721 in the middle and a hollow side groove 722 communicating with the hollow groove 721. The reverse tooth spring 73 is fixed in the hollow side groove 722. The lower end of the reverse tooth spring 73 has a reverse tooth 731 that matches the reverse tooth groove 82. The end of the reverse tooth spring 73 has a pressing rod 74. The pressing rod 74 passes through the three grooves 83 and extends outward.

[0044] like Figure 4 and Figure 6 As shown, the inverted toothed spring 73 of the bone hook rod 7 cooperates with the inverted toothed groove 82 in the bone hook claw 8, which can realize the forward movement of the bone hook claw 8. Pressing the pressing rods 74 on both sides inward causes the inverted toothed spring 73 to move towards the hollow groove 721 of the hollow square rod 72, so that the inverted toothed spring 73 disengages from the inverted toothed groove 82. The pressing rod 74 moves along the sliding groove 83 to realize the reverse stroke movement of the bone hook claw 8.

[0045] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A large-angle universal interchangeable adjustable bone hook, characterized in that, include: The system comprises a bone hook cap, a ball-head rod, a bone hook seat, a pin, a stop block, a bone hook rod, and a bone hook claw. The upper spherical surface of the ball-head rod fits into the spherical groove of the bone hook cap. The lower end of the bone hook cap has four arc-shaped grooves communicating with the spherical grooves. The lower end of the ball-head rod is fixed to the upper end of the bone hook seat. The bone hook seat has spherical grooves spaced apart in the middle. The bone hook seat has two sliding grooves on both sides communicating with the spherical grooves. The bone hook seat has a second sliding groove perpendicular to and communicating with the first sliding groove. The ball head at the top of the bone hook rod is fitted into the spherical groove. The stop block is slidably disposed within the first sliding groove. The pin is elastically slidably disposed within the second slide groove. The pin is engaged with the stop block. The bone hook claw is sleeved on the bone hook rod and connected by a toothed engagement. The bone hook rod is provided with an adjustment component. Three sets of ball grooves are spaced apart. The first slide groove has an inverted trapezoidal cross-section. The pin includes a round rod portion and a engaging portion. The engaging portion is spaced apart at the lower end of the round rod portion. A spring is provided on the bottom right side of the second slide groove. The pin is disposed at the left end of the spring, and the left end of the pin is located outside the second slide groove. The stop block is provided with a groove that matches the engaging portion.

2. The large-angle universal interchangeable adjustable bone hook according to claim 1, characterized in that, The ball head is threaded to the top of a retaining ring, and the upper end of the retaining ring has protrusions on both sides. The inner side of the bone hook cap has a groove that matches the protrusions.

3. The large-angle universal interchangeable adjustable bone hook according to claim 1, characterized in that, The lower end of the ball head is threaded into the threaded hole at the top of the bone hook seat, and a pin is inserted through the threaded hole and the bottom end of the ball head.

4. The large-angle universal interchangeable adjustable bone hook according to claim 1, characterized in that, The stop block is I-shaped, circular, or other shapes. The upper end of the stop block is slidably disposed in a groove, and the lower end of the stop block is located at the lower end of the bone hook seat. The inner side of the stop block is provided with a hemispherical groove that matches the ball head.

5. A large-angle universal interchangeable adjustable bone hook according to claim 1, characterized in that, The bone hook claw has a vertical sliding groove in the middle, and a reverse tooth groove is symmetrically arranged on the inner end face of the vertical sliding groove. The vertical sliding groove has a through sliding groove three on both sides. The adjustment component includes a hollow square rod and a reverse tooth spring. The hollow square rod is slidably arranged in the vertical sliding groove. The hollow square rod has a hollow groove in the middle and a hollow side groove communicating with the hollow groove. The reverse tooth spring is fixed in the hollow side groove. The lower end of the reverse tooth spring has a reverse tooth that matches the reverse tooth groove. The end of the reverse tooth spring has a pressing rod. The pressing rod passes through the sliding groove three and extends outward.

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