Shoulder glenosphere holder

Abstract

This utility model proposes a glenoid head holder, which solves the problem that existing holders cannot adapt to glenoid heads of different sizes. The solution includes a main body and a mandrel. The center of the main body is hollowed out along its axial direction to allow the mandrel to pass through. One end of the main body is hinged with multiple claws, and the other end is fixed with a base to elastically limit the end of the mandrel. The end of the mandrel near the base is fixed with an exposed insert rod of the main body so that the mandrel can be moved along the axial direction of the main body after external force is applied. The other end is fixed with a striking head. The shaft section of the mandrel near the claws is also provided with a linkage. The striking head is located at the center of the interval of the multiple claws. The multiple claws are equidistantly arranged around the axial direction of the main body, and the displacement of the mandrel is converted into the opening and closing of the outer end of the claws through the linkage. The ends of the multiple claws protrude inward to limit the external glenoid head.

Description

Technical Field

[0001] This utility model relates to the field of artificial shoulder joint replacement equipment, and in particular to a glenoid ball head holder. Background Technology

[0002] Currently, with the development of medical technology, artificial shoulder joint replacement surgery has become a major means of treating shoulder joint diseases. Specifically, shoulder joint prosthesis replacement surgery can be used to treat three- or four-part fractures of the proximal humerus, congenital malformations, malignant tumors of the shoulder, and avascular necrosis of the humeral head, with significant efficacy.

[0003] During shoulder replacement surgery, a glenoid head holder is used to hold the glenoid head. The surgeon holds the glenoid head holder and places the glenoid head in the appropriate position. Currently, the commonly used method for holding the glenoid head holder during surgery is to use two claws to clamp the side walls of the glenoid head, and a ball socket at the bottom that can move back and forth to hold the arc surface of the ball head for positioning.

[0004] The glenoid bulb holder described above uses a two-jaw clamping mechanism during surgery. Therefore, it's necessary to manually locate the center position of the glenoid bulb relative to the two jaws. During this process, because the bulb's surface is smooth and there's no restraint, the bulb can easily detach upon impact with the jaws, causing implant contamination. Furthermore, since glenoid bulb implants cannot be reused after sterilization, this not only prolongs the surgical procedure but also wastes the product. In addition, the two-jaw clamping mechanism results in uneven clamping force and poor stability, making it prone to tilting. This can cause abrasions or scratches on the glenoid bulb surface and deviations in the implantation angle. Moreover, the two-jaw clamping method has limited capacity; if multiple different sizes of glenoid bulbs need to be clamped, different sized glenoid bulb holders must be prepared.

[0005] To address this issue, we propose a shoulder ball head gripper. Utility Model Content

[0006] The technical problem this utility model aims to solve is to overcome the defects of existing technology. This utility model proposes a girdle head holder, which adopts a three-jaw design. The bottom is provided with a ball socket that can move back and forth, which works with the three jaws to fix the ball head. During installation, it has a good limiting effect on the ball head, the clamping force is evenly distributed, and the stability is good. It greatly reduces the risk of scratches and abrasions on the surface of the girdle head during clamping. It is fixed in three directions, and the positioning is accurate, preventing the girdle head from falling off during installation. In addition, the three-jaw clamping mechanism can be adjusted to accommodate girdle head of different diameters by adjusting the distance between the jaws.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a glenoid head holder, comprising: a main body and a spindle, wherein the center of the main body is hollowed out along its axial direction to allow the spindle to pass through, one end of the main body is hinged with multiple claws, and the other end is fixed with a base to elastically limit the end of the spindle, one end of the spindle near the base is fixed with an exposed insert rod of the main body so that the spindle can be moved along the axial direction of the main body after external force is applied, and the other end is fixed with a striking head, wherein the spindle is also provided with a linkage member on the shaft section near the claws, the striking head is located at the center of the interval of the multiple claws, the multiple claws are equidistantly arranged around the axial direction of the main body, and the displacement of the spindle is converted into the opening and closing of the outer end of the claws through the linkage member, and the ends of the multiple claws protrude inward to limit the external glenoid head.

[0008] Furthermore, there are three claws, and the main body is also fixed with a step at each claw. A first fixing ear is fixed at the bottom of each step. The end of the claw near the main body is a concave waist-shaped groove, and a fixing pin hole and a connecting pin hole are opened at the corresponding waist-shaped groove. The fixing pin hole is connected to the first fixing ear.

[0009] Furthermore, the linkage includes a connecting block and a first spring. The connecting block is sleeved on the outer wall of the mandrel. A second fixing ear is fixed on the side of the connecting block between each pair of adjacent claws. The second fixing ear is pinned to the connecting pin hole. The first spring is sleeved on the outer wall of the mandrel, with one end connected to the connecting block and the other end connected to one end of the step of the main body.

[0010] Furthermore, the insertion rod has a threaded hole that mates with a screw, and the insertion rod is then fixed to the spindle by the screw. A wrench is fixed to each end of the exposed body of the insertion rod.

[0011] Furthermore, the base is threadedly engaged with the main body, and the spindle has a protrusion at one end near the base. One end of the second spring is connected to the protrusion, and the other end is connected to the base.

[0012] Furthermore, the bottom of the striking head is provided with an arc-shaped groove that is adapted to the external shoulder ball head.

[0013] Compared with the prior art, the beneficial effects of this utility model include: 1. It adopts a three-claw design with a ball socket that can move back and forth at the bottom. The ball socket works with the three claws to fix the ball head. It has a good limiting effect on the ball head of the shoulder bowl during installation. The clamping force is evenly distributed and the stability is good, which greatly reduces the risk of scratches and abrasions on the surface of the ball head of the shoulder bowl during clamping. 2. It is fixed in three directions, ensuring precise positioning and preventing the shoulder ball head from falling off during installation; in addition, the three-jaw clamping mechanism can be adjusted to accommodate shoulder ball heads of different diameters, making it more adaptable. 3. The operation is simple and convenient, saving surgical time and reducing surgical risks. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 The schematic diagram shows the overall structure of the clamp according to one embodiment of the present invention; Figure 2 The diagram schematically shows a cross-sectional view of the internal structure of a clamp according to one embodiment of the present invention.

[0015] The following are the labels in the diagram: 1. Base; 2. Main body; 3. Screw; 4. Wrench; 5. Insert rod; 6. Mandrel; 7. Step; 8. First spring; 9. Strike head; 10. Claw; 11. Shoulder ball head; 12. Fixing pin hole; 13. Connecting block; 14. First fixing ear; 15. Connecting pin hole; 16. Waist-shaped pin hole; 17. Second fixing ear; 18. Second spring. Detailed Implementation

[0016] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0017] According to one embodiment of the present invention, in conjunction with Figures 1-2 As shown.

[0018] In this embodiment, a glenoid head 11 holder includes a main body 2 and a spindle 6. The center of the main body 2 is hollowed out along its axial direction to allow the spindle 6 to pass through. One end of the main body 2 is hinged with a plurality of claws 10, and the other end is fixed with a base 1 to elastically limit the end of the spindle 6. The end of the spindle 6 near the base 1 is fixed with an exposed insert 5 of the main body 2 so that the spindle 6 can be moved along the axial direction of the main body 2 by external force. The other end is fixed with a striking head 9. The spindle 6 is also provided with a linkage member on the shaft section near the claws 10. The striking head 9 is located at the center of the interval of the plurality of claws 10. The plurality of claws 10 are equidistantly arranged around the axial direction of the main body 2, and the displacement of the spindle 6 is converted into the opening and closing of the outer end of the claws 10 by the linkage member. The ends of the plurality of claws protrude inward to limit the external glenoid head 11.

[0019] Furthermore, there are three claws 10. The main body 2 is also fixed with a step 7 corresponding to each claw 10. A first fixing ear 14 is fixed at the bottom of each step 7. The end of the claw 10 near the main body 2 is a concave waist-shaped groove, and a fixing pin hole 12 and a connecting pin hole 15 are opened at the corresponding waist-shaped groove. The fixing pin hole 12 is pinned to the first fixing ear 14. The linkage includes a connecting block 13 and a first spring 8. The connecting block 13 is sleeved on the outer wall of the spindle 6. A second fixing ear 17 is fixed on the side of the connecting block 13 between each pair of adjacent claws 10. The second fixing ear 17 is pinned to the connecting pin hole 15. The first spring 8 is sleeved on the outer wall of the spindle 6, with one end connected to the connecting block 13 and the other end connected to one end of the step 7 of the main body 2.

[0020] Furthermore, the insertion rod 5 has a threaded hole that mates with the screw 3, thereby fixing the insertion rod 5 to the spindle 6 by the screw 3. Wrenches 4 are fixed to both ends of the insertion rod 5 on the exposed body 2. The base 1 is threadedly engaged with the body 2. The spindle 6 has a protrusion at one end near the base 1. One end of the second spring 18 is connected to the protrusion, and the other end is connected to the base 1. The bottom of the striking head 9 has an arc-shaped groove that matches the external shoulder ball head 11.

[0021] With the above structure, three first fixed ears 14 are arranged in a circular array on the main body 2. The first fixed ears 14 are provided with cylindrical pin holes, and the claws 10 are provided with waist-shaped grooves that cooperate with the cylindrical pin holes. The cylindrical pin holes are connected to the waist-shaped grooves through the cylindrical pins, and the claws 10 can rotate relative to the cylindrical pins through the waist-shaped grooves. The steps 7 and the connecting block 13 are both provided with grooves at their close ends to limit the position of the first spring 8; three second fixing ears 17 are arranged in a circumferential array on the connecting block 13, and the second fixing ears 17 are connected to the connecting pin holes 15 on the claw 10 by pins; the connecting block 13 and the main body 2 are provided with holes that mate with the spindle 6, and the spindle 6 can move back and forth in the holes. The left end of the spindle 6 is fixedly connected to the striking head 9 through the fixing pin hole 12. The head of the striking head 9 is provided with an arc-shaped groove that matches the globular head 11. The spindle 6 passes through the connecting block 13 and the main body 2. The spindle 6 is provided with a hole that mates with the insertion rod 5. The insertion rod 5 is provided with a threaded hole that mates with the screw 3, and then the insertion rod 5 is fixed to the spindle 6 by the screw 3; a wrench 4 is provided at each of the upper and lower ends of the insertion rod 5; a protrusion is provided at the right end of the spindle 6, and the left end of the second spring 18 is close to the protrusion; the base 1 is fixedly connected to the main body 2, and the right end of the second spring 18 is close to the base 1.

[0022] In actual use, the working principle is as follows: To use, first turn the lever 4. The striking head 9 will exert force on the connecting block 13. At this time, the three locking jaws 10 will rotate away from each other, and the striking head 9 will also move to the right. After adjusting the three locking jaws 10 to the appropriate position, place the ball head in the space formed by the three locking jaws 10. Then release the lever 4. The locking jaws 10 will rotate towards each other under the action of the spring force. At the same time, the arc surface of the striking head 9 will press against the bottom of the gimbal ball head 11, thereby locking the gimbal ball head 11. After the gimbal ball head 11 is placed in the appropriate position, turn the lever 4 again to remove the gimbal ball head 11.

[0023] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A shoulder ball head gripper, characterized in that, include: The main body and the mandrel are arranged in a structure. The center of the main body is hollowed out along its axial direction to allow the mandrel to pass through. One end of the main body is hinged with multiple jaws, and the other end is fixed with a base to elastically limit the end of the mandrel. The end of the mandrel near the base is fixed with an exposed insert rod of the main body so that the mandrel can be moved along the axial direction of the main body after external force is applied. The other end is fixed with a striking head. The mandrel is also provided with a linkage component on the shaft section near the jaws. The striking head is located at the center of the interval of the multiple jaws. The multiple jaws are equidistantly arranged around the axial direction of the main body, and the displacement of the mandrel is converted into the opening and closing of the outer end of the jaws through the linkage component. The ends of the multiple jaws protrude inward to limit the external shoulder ball head.

2. The shoulder ball head gripper according to claim 1, characterized in that: The main body has three claws, and a step is fixed at each claw. A first fixing ear is fixed at the bottom of each step. The end of the claw near the main body is a concave waist-shaped groove, and a fixing pin hole and a connecting pin hole are opened at the corresponding waist-shaped groove. The fixing pin hole is connected to the first fixing ear.

3. The shoulder ball head gripper according to claim 2, characterized in that: The linkage component includes a connecting block and a first spring. The connecting block is sleeved on the outer wall of the mandrel. A second fixing lug is fixed on the side of the connecting block between each pair of adjacent claws. The second fixing lug is pinned to the connecting pin hole. The first spring is sleeved on the outer wall of the mandrel, with one end connected to the connecting block and the other end connected to one end of the step of the main body.

4. The shoulder ball head gripper according to claim 1, characterized in that: The insertion rod has a threaded hole that mates with a screw, and the insertion rod is then fixed to the spindle by the screw. A wrench is fixed to each end of the insertion rod at the exposed body.

5. The shoulder ball head gripper according to claim 1, characterized in that: The base is threadedly engaged with the main body, and the spindle has a protrusion at one end near the base. One end of the second spring is connected to the protrusion, and the other end is connected to the base.

6. The shoulder ball head gripper according to claim 1, characterized in that: The bottom of the striking head has an arc-shaped groove that matches the external globular head.

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