Guiding device special for pelvis

Abstract

The utility model discloses a special pelvis guiding device which comprises a middle plate, guiding ends A are installed on the two sides of the middle plate, and driving ends A used for walking left and right are movably arranged on the guiding ends A; and the two driving ends B are rotationally installed at the tops of the driving ends A on the two sides correspondingly, the driving end of the driving end B on the left side is provided with a guiding end B capable of horizontally moving, and a positioning block A is installed at the bottom of the tail end of the guiding end B. According to the guiding device special for the pelvis, the positions of the positioning block A and the guiding end C can be adjusted left and right, front and back and the angles of the positioning block A and the guiding end C can be adjusted, mechanical control is achieved, the rotation degree or the translation distance can be conveniently and quantitatively controlled at a fixed point, the guiding device cannot move under the action of external force after adjustment is completed, the positioning accuracy is guaranteed, and the service life of the pelvis is prolonged. Therefore, the surgical effect is improved, the structure is more optimized, and the design is more reasonable.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic prosthesis auxiliary installation, in particular to a special pelvis guiding device. Background Art

[0002] Pelvic tumors are relatively common, accounting for about 3%-4% of primary bone tumors. Because pelvic tumors often involve the acetabulum and are very large, surgery often requires hemipelvic resection. Hemipelvic resection refers to the resection of the half pelvis and the lower limb on the same side, also known as the posterior quarter amputation, which will cause the patient to lose the function of the lower limbs and cause a serious mental blow. The concept of comprehensive limb-saving treatment while treating bone tumors has been widely accepted. After removing the hemipelvis with the tumor and performing an internal hemipelvic resection, the reconstruction of the pelvic ring becomes the key to restoring the patient's lower limb function. Especially after the acetabulum and most or all of the ilium, pubis and ischium are removed at the same time, the structural and functional reconstruction of the hemipelvis and hip joint is a difficult problem.

[0003] This application is an improvement on the prior art, and the Chinese patent application number is: 2021223436082. The utility model discloses a pelvic prosthesis installation guide device, which is characterized by including a first positioning block, a first connecting rod, a second connecting rod, a third connecting rod and a second positioning block. The beneficial effect of the utility model is that the structure is simple, and by setting a reference point and establishing a three-dimensional framework with the reference point, the characteristic position of the acetabulum is accurately positioned, the prosthesis is assisted in installation, and it is safe and reliable, and the surgical accuracy is improved.

[0004] It has the following shortcomings:

[0005] When the positioning block is moved, it is manually driven to rotate or translate. Manually driven rotation and translation is not conducive to mastering the rotation angle and translation distance, resulting in inaccurate movement. At the same time, it does not have a locking function. After the adjustment is completed, the entire structure may still move, resulting in the position that has just been positioned to be offset. The structure is not optimized enough and the design is not reasonable enough. Utility Model Content

[0006] The purpose of the utility model is to provide a pelvis-specific guiding device to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A pelvis-specific guiding device, comprising:

[0009] A middle plate, wherein guide ends A are installed on both sides of the middle plate, and a driving end A for left and right walking is movably arranged on the guide end A;

[0010] Two driving ends B, the two driving ends B are rotatably mounted on the top of the driving ends A on both sides, the driving end of the left driving end B is provided with a guide end B that can be moved in translation, and a positioning block A is installed at the bottom of the tail end of the guide end B, and the driving end of the right driving end B is provided with a guide end C that can be moved in translation, and a connecting rod is installed at the tail end of the guide end C, and a positioning block B is welded at the tail end of the connecting rod;

[0011] The positions of the positioning block A7 and the guide end C8 can be adjusted left and right, front and back, and their angles can also be adjusted by machinery, which is convenient for fixed-point and quantitative control of the rotation degree or translation distance. Moreover, after the adjustment is completed, there will be no movement under the action of external force, thereby ensuring the accuracy of positioning, thereby improving the effect of the operation, and its structure is more optimized and the design is more reasonable.

[0012] As a further solution of the utility model: the guide end A, the guide end B and the guide end C have the same structure, the guide end A includes a cross beam plate, and a rack is installed on the rear side of the cross beam plate.

[0013] As a further solution of the utility model: the structure of the driving end A is consistent with that of the driving end B, and the driving end A includes an L-shaped frame, a chassis is installed inside the L-shaped frame, a stepper motor is installed on the top of the chassis, and a gear meshing with the rack is installed at the driving end of the stepper motor.

[0014] As a further solution of the utility model: the top and the bottom of the cross beam plate are both provided with slide grooves, and the top and the bottom of the inner wall of the L-shaped frame are installed outwardly with slide bars sliding inside the slide grooves.

[0015] As a further solution of the utility model: a driving motor for driving the driving end B to rotate is installed on the top of the driving end A, and the driving end of the driving motor is connected to the bottom of the driving end B.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The principle of the lateral position adjustment of the positioning block A and the guide end C is the same. The stepper motor drives the gear to rotate. Under the meshing transmission of the gear and the rack, since the rack is fixed, all the gears drive the stepper motor to move, and then drive the L-shaped frame to move, so as to realize the lateral adjustment of the position of the positioning block A or the guide end C. The adjustment position is in the state of pressing and stopping, and can be adjusted at any time, and can also be controlled to move at a fixed distance. There will be no position offset after the adjustment is completed.

[0018] 2. In the present invention, the adjustment principle of the angle of the positioning block A is consistent with that of the guide end C. When the guide end B or the guide end C is driven to rotate by the driving motor, the positioning block A or the positioning block B can be driven to rotate to adjust its position. After the adjustment is completed, there will be no position offset.

[0019] 3. In the present invention, the principle of adjusting the front and rear positions of the positioning blocks A and B is consistent, and the process is consistent with the principle of adjusting the lateral positions of the positioning blocks A and the guide end C, so the front and rear positions of the positioning blocks A and B can be adjusted, and there will be no position offset after the adjustment is completed.

[0020] 4. The utility model can realize the left-right, front-back and angle adjustment of the positioning block A and the guide end C, which are controlled by the machine, and are convenient for the fixed-point and quantitative control of the rotation degree or the translation distance. Moreover, after the adjustment is completed, there will be no movement under the action of external force, thus ensuring the accuracy of positioning, thereby improving the effect of the operation, and its structure is more optimized and the design is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view structural schematic diagram of a pelvis-specific guide device;

[0022] Figure 2 A top view of a crossbeam plate in a pelvis-specific guide device;

[0023] Figure 3 The figure is a front view of an L-shaped frame in a pelvis-specific guide device.

[0024] In the figure: middle plate 1, guide end A2, drive end A3, drive motor 4, drive end B5, guide end B6, positioning block A7, guide end C8, connecting rod 9, positioning B10, crossbeam plate 11, slide groove 12, rack 13, L-shaped frame 14, chassis 15, stepper motor 16, gear 17, slide bar 18. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 3 The utility model proposes a technical solution, a pelvic dedicated guiding device, comprising:

[0027] The middle plate 1 has guide ends A2 installed on both sides of the middle plate 1, and the guide ends A2 are movably provided with driving ends A3 for left and right walking;

[0028] Two driving ends B5 are rotatably installed on the top of the driving ends A3 on both sides respectively. The driving end of the left driving end B5 is provided with a guide end B6 that can be moved translationally, and a positioning block A7 is installed at the bottom of the tail end of the guide end B6. The lower surface of the positioning block A7 is set to a shape that matches the curvature of a healthy bone joint in the human body, and threaded holes are opened on both sides of the top of the positioning block A7. The positioning bolts pass through the threaded holes and are driven into the healthy bones as a positioning reference for the acetabulum position. The driving end of the right driving end B5 is provided with a guide end C8 that can be moved translationally, and a connecting rod 9 is installed at the tail end of the guide end C8. A positioning B10 is welded at the tail end of the connecting rod 9, and the outward end of the positioning B10 matches the arc surface of the acetabulum structure.

[0029] The structures of the guide end A2 and the guide end B6 are consistent with those of the guide end C8. The guide end A2 includes a cross beam plate 11, and a rack 13 is installed on the rear side of the cross beam plate 11.

[0030] The structure of the driving end A3 is consistent with that of the driving end B5. The driving end A3 includes an L-shaped frame 14. A chassis 15 is installed inside the L-shaped frame 14. A power supply is installed inside the chassis 15. A stepper motor 16 is installed on the top of the chassis 15, and a gear 17 meshing with the rack 13 is installed at the driving end of the stepper motor 16.

[0031] The top and bottom of the cross beam plate 11 are both provided with a slide groove 12 , and the top and bottom of the inner wall of the L-shaped frame 14 are provided with a slide bar 18 that slides inside the slide groove 12 toward the outside.

[0032] A driving motor 4 for driving the driving end B5 to rotate is installed on the top of the driving end A3, and the driving end of the driving motor 4 is connected to the bottom of the driving end B5.

[0033] The working principle of the utility model is:

[0034] When in use, before performing hemipelvectomy, fit the lower surface of the positioning block A7 with the healthy pelvis, and fix the positioning block A7 and the healthy pelvis together with the positioning bolts, locate the position of the positioning block A7, and then adjust the position so that the positioning block B10 fits the acetabulum;

[0035] The positioning bolts are removed, the guide is properly placed, and the hemipelvectomy is performed;

[0036] The principle of lateral position adjustment of positioning block A7 and guide end C8 is the same, the process is as follows:

[0037] The stepper motor 16 drives the gear 17 to rotate. Under the meshing transmission of the gear 17 and the rack 13, since the rack 13 is fixed, all the gears 17 drive the stepper motor 16 to move, and then drive the L-shaped frame 14 to move, so as to achieve the lateral adjustment of the position of the positioning block A7 or the guide end C8. The adjustment position is in the state of pressing and stopping, and can be adjusted at any time, and can also be controlled to move at a fixed distance. After the adjustment is completed, there will be no position deviation;

[0038] The adjustment principle of the positioning block A7 and the guide end C8 angle is the same, the process is as follows:

[0039] The guide end B6 or the guide end C8 is driven to rotate by the driving motor 4, and the positioning block A7 or the positioning block B10 is driven to rotate to adjust the position thereof. After the adjustment is completed, there will be no position deviation.

[0040] The principle of front and rear position adjustment of positioning block A7 is consistent with that of positioning B10, and the process is consistent with the principle of lateral position adjustment of positioning block A7 and guide end C8, so the front and rear positions of positioning block A7 and positioning B10 can be adjusted, and there will be no position offset after the adjustment is completed.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pelvic-specific guiding device, characterized in that: include: A middle plate (1), wherein guide ends A (2) are installed on both sides of the middle plate (1), and a driving end A (3) for moving left and right is movably provided on the guide end A (2); Two driving ends B (5) are rotatably mounted on the top of the driving ends A (3) on both sides, respectively; the driving end of the left driving end B (5) is provided with a guide end B (6) that can be moved in translation, and a positioning block A (7) is installed at the bottom of the tail end of the guide end B (6); the driving end of the right driving end B (5) is provided with a guide end C (8) that can be moved in translation, and a connecting rod (9) is installed at the tail end of the guide end C (8), and a positioning block B (10) is welded to the tail end of the connecting rod (9).

2. A pelvic-specific guiding device according to claim 1, characterized in that: The guide end A (2), the guide end B (6) and the guide end C (8) have the same structure. The guide end A (2) comprises a crossbeam plate (11), and a rack (13) is installed on the rear side of the crossbeam plate (11).

3. A pelvic-specific guiding device according to claim 2, characterized in that: The drive end A (3) has the same structure as the drive end B (5), and the drive end A (3) comprises an L-shaped frame (14), a chassis (15) is installed inside the L-shaped frame (14), a stepper motor (16) is installed on the top of the chassis (15), and a gear (17) meshing with the rack (13) is installed at the drive end of the stepper motor (16).

4. A pelvic-specific guiding device according to claim 3, characterized in that: The top and bottom of the cross beam plate (11) are both provided with a slide groove (12), and the top and bottom of the inner wall of the L-shaped frame (14) are provided with a slide bar (18) which slides inside the slide groove (12) and is installed outward.

5. The pelvic-specific guiding device according to claim 1, characterized in that: A driving motor (4) for driving the driving end B (5) to rotate is installed on the top of the driving end A (3), and the driving end of the driving motor (4) is connected to the bottom of the driving end B (5).

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