Surgical three-dimensional angle measuring instrument

Abstract

The invention relates to the technical field of medical instruments, in particular to a surgical three-dimensional angle measuring instrument which comprises a measuring unit and a functional unit. The measuring unit comprises a semicircular protractor, a fixed shaft is fixedly mounted at the circle center of the semicircular protractor, and the fixed shaft is rotatably sleeved with a semi-ring protractor; the functional unit comprises a damping pad which is arranged between the semi-ring type protractor and the fixed shaft in a sliding manner; an adjusting assembly is arranged on the fixing shaft. Compared with the prior art, the semi-circular protractor and the semi-ring protractor are combined to measure a three-dimensional angle, the semi-ring protractor can be quickly rotated to a roughly required angle by arranging the coarse adjustment ring and the fine adjustment knob, and more accurate angle adjustment is realized by rotating the fine adjustment knob, so that the measurement accuracy is improved, and the measurement precision is improved. A powerful guarantee is provided for high-precision angle measurement, it is ensured that the measurement result corresponds to the measurement axis of the protractor through concentric clamping and a positioning line, and errors caused by deviation are avoided.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a three-dimensional angle measuring instrument for surgical procedures. Background Technology

[0002] In surgical procedures, especially those involving the skeletal system, such as hip replacement and pedicle screw implantation, anteversion and abduction angles are two crucial anatomical parameters. Anteversion typically refers to the angle of inclination of a skeletal structure (such as the femoral neck) in the sagittal plane. The anteversion angle of the femoral prosthesis significantly impacts its stability, joint range of motion, and postoperative functional recovery. Inappropriate anteversion angle settings can lead to complications such as prosthesis dislocation and impingement syndrome. Abduction angle, on the other hand, refers to the angle of inclination of a skeletal structure (such as the femoral neck or pedicle) in the coronal plane. In pedicle screw implantation, accurate abduction angle settings are essential for screw fixation strength, stability, and preventing damage to surrounding neurovascular structures.

[0003] Currently, in most hip replacement and pedicle screw implantation surgeries, the setting of the anteversion and abduction angles mainly relies on the surgeon's experience and feel. This results in surgical outcomes being greatly influenced by the surgeon's individual skills and experience, making it difficult to guarantee the accuracy and consistency of the surgery. During the operation, it is difficult to accurately measure the anteversion and abduction angles, which may lead to deviations in surgical results, increase surgical risks and the incidence of complications. Furthermore, for young or less experienced doctors, mastering this method requires a long period of learning and practical experience.

[0004] Therefore, this application provides a surgical three-dimensional angle measuring instrument to meet the need for accurate measurement of three-dimensional angles during surgery. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a three-dimensional angle measuring instrument for surgical procedures, so as to solve the problems of inaccurate measurement of three-dimensional angles and the complexity and inconvenience of operation of the equipment.

[0006] To achieve the above objectives, the present invention provides a three-dimensional angle measuring instrument for surgical procedures, comprising a measuring unit and a functional unit; The measuring unit includes a semi-circular protractor, a fixed shaft is fixedly installed at the center of the semi-circular protractor, and a semi-annular protractor is rotatably mounted on the fixed shaft. The semi-annular protractor and the semi-circular protractor are concentrically arranged. The functional unit includes a damping pad that is slidably installed between the semi-circular protractor and the fixed shaft. A threaded hole is provided on the semi-circular protractor at a position corresponding to the damping pad, and an adjusting bolt is screwed into the threaded hole. The fixed shaft is equipped with an adjustment component, the semi-circular protractor is equipped with a measuring component, and the semi-circular protractor is equipped with a fixing component.

[0007] Preferably, the adjustment assembly includes an adjustment gear ring fixedly installed at the position corresponding to the semi-annular protractor and the fixed shaft. A fixed ring is fixedly fitted at one end of the fixed shaft extending out of the semi-annular protractor. A drive gear that meshes with the adjustment gear ring is rotatably installed on the fixed ring. A coarse adjustment ring is rotatably fitted on the fixed ring. An internal gear ring that meshes with the drive gear is fixedly installed at one end of the coarse adjustment ring extending out of the fixed ring. A fine adjustment assembly is provided on the fixed shaft.

[0008] Preferably, the fine-tuning component includes a through hole formed on the fixed ring and corresponding to the drive gear, a connecting shaft rotatably mounted in the through hole, one end of the connecting shaft being fixedly connected to the drive gear, a reduction gear being fixedly mounted on the other end of the connecting shaft, a fine-tuning gear meshing with the reduction gear being rotatably mounted on the fixed shaft, and a fine-tuning knob being fixedly mounted on the fine-tuning gear.

[0009] Preferably, the measuring component includes a C-shaped clamp block slidably mounted on the semi-circular protractor, a pressure plate slidably mounted on the inner sidewall of the clamp block, a spring fixedly mounted between the pressure plate and the inner bottom wall of the clamp block, a plurality of meshing teeth evenly fixedly mounted on the inner top wall of the clamp block, and a clamping component provided on the outer top wall of the clamp block.

[0010] Preferably, a convex lens is fixedly installed at the notch of the card block, and a positioning line is fixedly provided on the convex lens along the radial direction of the semi-circular protractor.

[0011] Preferably, a sliding ring is slidably mounted on the semi-circular protractor, and a flexible strip arranged radially along the semi-circular protractor is fixedly mounted on the sliding ring.

[0012] Preferably, the clamping assembly includes a fixed sleeve fixedly installed on the outer top wall of the clamping block, a rotating tube rotatably installed on the fixed sleeve, three guide holes arranged in a ring array on the rotating tube, a guide rod slidably installed in the guide holes, a clamping plate fixedly installed at one end of the guide rod extending into the rotating tube, a protruding ring screwed into the fixed sleeve, a guide block fixedly installed on the top of the protruding ring, a guide groove adapted to the guide block being opened on the inner side wall of the rotating tube, and a spring two fixedly installed between the clamping plate and the rotating tube.

[0013] Preferably, the fixing component includes a mounting ring fixedly installed at the center of the other end of the semi-circular protractor, a mounting plate rotatably installed inside the mounting ring, a connecting plate fixedly installed at the other end of the mounting plate, a gripping component provided on the connecting plate, a plurality of positioning teeth arranged in a ring array fixedly installed on the inner sidewall of the mounting ring, two clearance grooves symmetrically opened on the mounting plate, a positioning block adapted to the positioning teeth is slidably installed in the clearance groove, and a spring is fixedly installed between the positioning block and the clearance groove.

[0014] Preferably, the gripping assembly includes a fixed frame fixedly mounted on the connecting plate, a movable arm slidably mounted inside the fixed frame, a handle fixedly mounted at the other end of the movable arm, a plurality of spherical grooves arranged in a linear array on the inner sidewall of the fixed frame, a sliding groove on the movable arm, a fixing pin adapted to the spherical groove slidably mounted inside the sliding groove, and a spring fixedly mounted between the fixing pin and the sliding groove.

[0015] Preferably, a bubble level is fixedly installed on the semi-circular protractor.

[0016] The beneficial effects of this invention are: 1. This type of surgical three-dimensional angle measuring instrument achieves the measurement of three-dimensional angles by setting a semi-circular protractor and a semi-ring protractor. By setting a damping pad, the protractor can be suspended at any angle during rotation, which is convenient for accurately measuring the abduction angle and anteversion angle of the placed object (such as the long rod of the acetabular cup or the pedicle screw placement rod). When the damping pad wears and causes changes in damping, the pressure between the damping pad and the fixed shaft can be adjusted by adjusting the bolt to ensure that the damping effect always meets the measurement requirements and ensures the accuracy of the measurement. 2. This type of three-dimensional angle measuring instrument for surgical procedures, by setting a coarse adjustment ring and a fine adjustment knob, allows the coarse adjustment ring to quickly rotate the semi-circular protractor to approximately the required angle by driving the internal gear ring, drive gear, and adjustment gear ring. The fine adjustment knob, through the action of the fine adjustment gear and reduction gear, reduces the larger angular velocity of rotating the fine adjustment knob to a smaller angular velocity proportional to the radius ratio and transmits it to the semi-circular protractor, achieving more precise angle adjustment and greatly improving the accuracy of measurement, providing a strong guarantee for high-precision angle measurement. 3. This type of three-dimensional angle measuring instrument for surgical procedures utilizes a locking block in conjunction with a semi-circular protractor. Pulling the locking block outwards allows the cleaving teeth to disengage from the protractor surface, enabling easy sliding of the block to the desired angle measurement position. Releasing the locking block releases the spring, causing the cleaving teeth to engage with the outer wall of the protractor, thus fixing the position and facilitating angle recording. Simultaneously, the magnification effect of the convex lens and the assistance of the positioning lines ensure clearer and more accurate angle readings, avoiding reading errors and guaranteeing the accuracy of the measurement results. 4. This type of three-dimensional angle measuring instrument for surgical procedures uses a rotating tube to drive the convex ring to move. Under the action of the guide hole and guide rod, the clamping plate can move synchronously towards the center of the rotating tube, realizing the clamping of objects such as screws of different radii. At the same time, it ensures that the axis of the clamped object is located on the plane of the semi-circular protractor, avoiding measurement errors caused by axis offset, and enhancing the versatility and accuracy of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of a partial explosion structure of the present invention; Figure 3 This is a schematic diagram of the damping pad of the present invention; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the structure of the measuring component of the present invention; Figure 6 This is an exploded view of the clamping assembly of the present invention; Figure 7 This is a cross-sectional view of the clamping assembly of the present invention; Figure 8 This is a schematic diagram of the structure of the fixing component of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B; Figure 10 This is a schematic diagram of the telescopic component structure of the present invention.

[0019] The diagram is marked as follows: 1. Semicircular protractor; 2. Fixed shaft; 21. Semi-ring protractor; 3. Damping pad; 31. Adjusting bolt; 4. Adjusting gear ring; 41. Fixed ring; 42. Drive gear; 43. Coarse adjustment ring; 44. Internal gear ring; 45. Through hole; 46. Connecting shaft; 47. Reduction gear; 48. Fine adjustment gear; 49. Fine adjustment knob; 5. Locking block; 51. Pressure plate; 52. Spring 1; 53. Engaging teeth; 54. Convex lens; 55. Positioning line; 56. Sliding ring; 57. Flexible strip 6. Fixed sleeve; 61. Rotating tube; 62. Guide hole; 63. Guide rod; 64. Clamping plate; 65. Convex ring; 66. Guide block; 67. Guide groove; 68. Spring II; 7. Mounting ring; 71. Mounting plate; 72. Connecting plate; 73. Positioning tooth; 74. Leaving groove; 75. Positioning block; 76. Spring III; 8. Fixed frame; 81. Movable arm; 82. Handle; 83. Spherical groove; 84. Slide groove; 85. Fixed pin; 86. Spring IV; 9. Bubble level. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figures 1 to 10As shown, a three-dimensional angle measuring instrument for surgical procedures includes a measuring unit and a functional unit. The measuring unit includes a semi-circular protractor 1, with a fixed shaft 2 fixedly mounted at its center. A semi-annular protractor 21 is rotatably mounted on the fixed shaft 2, and the semi-annular protractor 21 is concentrically positioned with the semi-circular protractor 1. The functional unit includes a damping pad 3 slidably mounted between the semi-annular protractor 21 and the fixed shaft 2. A threaded hole is provided on the semi-annular protractor 21 at a position corresponding to the damping pad 3, and an adjusting bolt 31 is screwed into the threaded hole. An adjusting component is provided on the fixed shaft 2, a measuring component is provided on the semi-annular protractor 21, and a fixing component is provided on the semi-circular protractor 1. A bubble level 9 is fixedly mounted on the semi-circular protractor 1. In use, the semicircular protractor 1 is placed perpendicular to the horizontal plane and parallel to the longitudinal axis of the body. At this time, the long rod for placing the acetabular cup or the pedicle screw placement rod to be measured is placed on the measuring assembly. The semicircular protractor 21 can be driven to rotate along the fixed axis 2 by adjusting the assembly to measure the abduction angle and forward tilt angle of the placed object. The semicircular protractor 21 is tightly connected to the fixed axis 2 by the damping pad 3. It can be suspended at any angle during rotation. When the damping pad 3 is worn and the damping is too small to maintain suspension or too large to be easy to adjust, the pressure between the damping pad 3 and the fixed axis 2 can be increased or decreased by adjusting the bolt 31 to adjust the tightness.

[0023] like Figure 3 and Figure 4 As shown, the adjustment assembly includes an adjustment gear ring 4 fixedly installed at the corresponding position of the semi-circular protractor 21 and the fixed shaft 2. A fixed ring 41 is fixedly fitted at one end of the fixed shaft 2 extending out of the semi-circular protractor 21. A drive gear 42 that meshes with the adjustment gear ring 4 is rotatably installed on the fixed ring 41. A coarse adjustment ring 43 is rotatably fitted on the fixed ring 41. An internal gear ring 44 that meshes with the drive gear 42 is fixedly installed at one end of the coarse adjustment ring 43 extending out of the fixed ring 41. A fine adjustment assembly is provided on the fixed shaft 2. The fine adjustment assembly includes a through hole 45 opened on the fixed ring 41 and corresponding to the drive gear 42. A connecting shaft 46 is rotatably installed in the through hole 45. One end of the connecting shaft 46 is fixedly connected to the drive gear 42. A reduction gear 47 is fixedly installed at the other end of the connecting shaft 46. A fine adjustment gear 48 that meshes with the reduction gear 47 is rotatably installed on the fixed shaft 2. A fine adjustment knob 49 is fixedly installed on the fine adjustment gear 48. Rotating the coarse adjustment ring 43 drives the internal gear ring 44 to rotate, which in turn drives the drive gear 42 to rotate, thereby driving the adjustment gear ring 4 to rotate the semi-circular protractor 21 around the fixed axis 2. When the desired angle is reached, rotating the fine adjustment knob 49 drives the fine adjustment gear 48 to rotate, which in turn drives the reduction gear 47 to rotate. Through the connecting shaft 46, the drive gear 42 is driven to rotate the adjustment gear ring 4, thereby adjusting the angle. Because the large angular velocity of rotating the fine adjustment knob 49 is transmitted as linear velocity through the action of the fine adjustment gear 48 and the reduction gear 47, and the angular velocity is proportionally reduced by the radius ratio, the angle adjustment of the semi-circular protractor 21 is smaller when the fine adjustment knob 49 is rotated significantly, thereby achieving more precise adjustment, improving the accuracy of measurement, and ensuring the effect of surgery.

[0024] like Figure 1 and Figure 5 As shown, the measuring assembly includes a C-shaped locking block 5 slidably mounted on a semi-circular protractor 21. A pressure plate 51 is slidably mounted on the inner wall of the locking block 5. A spring 52 is fixedly mounted between the pressure plate 51 and the inner bottom wall of the locking block 5. Several meshing teeth 53 are evenly fixedly mounted on the inner top wall of the locking block 5. A clamping assembly is provided on the outer top wall of the locking block 5. A convex lens 54 is fixedly mounted at the notch of the locking block 5. A positioning line 55 is fixedly mounted on the convex lens 54 along the radial direction of the semi-circular protractor 21. A sliding ring 56 is slidably mounted on the semi-circular protractor 21. A flexible strip 57 is fixedly mounted on the sliding ring 56 along the radial direction of the semi-circular protractor 21. By pulling the locking block 5 outward, the pressure plate 51 compresses the spring 52, causing the meshing teeth 53 to disengage from the surface of the semi-circular protractor 21. At this point, the locking block 5 can be easily slid along the semi-circular protractor 21 to adjust the position of screws and other objects on it, thus moving it to the angle to be measured. Releasing the locking block 5 allows the meshing teeth 53 to engage with the outer wall of the semi-circular protractor 21 under the resetting action of the spring 52, thereby fixing the position of the locking block 5 and its screws, thus obtaining the required angle. The angle is fixed at the measured angle without shifting, facilitating angle recording. The magnification effect of lens 54 makes the angle reading clearer, and with the help of positioning line 55, the scale corresponding to the axis of objects such as screws can be accurately found, avoiding reading errors and ensuring the accuracy of the results. The angle between the semi-circular protractor 21 and the semi-circular protractor 1 can be obtained by moving the sliding ring 56 to the top of the semi-circular protractor 21 and by the correspondence between the flexible strip 57 and the scale on the semi-circular protractor 1. The flexible strip 57 can avoid the semi-circular protractor 1, allowing the sliding ring 56 to slide completely along the semi-circular protractor 21, avoiding interference with the angle measurement of the locking block 5.

[0025] like Figures 5 to 7As shown, the clamping assembly includes a fixed sleeve 6 fixedly installed on the outer top wall of the clamping block 5. A rotating tube 61 is rotatably installed on the fixed sleeve 6. Three guide holes 62 arranged in a ring array are opened on the rotating tube 61. A guide rod 63 is slidably installed in the guide holes 62. A clamping plate 64 is fixedly installed at one end of the guide rod 63 that extends into the rotating tube 61. A protruding ring 65 is screwed into the fixed sleeve 6. A guide block 66 is fixedly installed on the top of the protruding ring 65. A guide groove 67 adapted to the guide block 66 is opened on the inner side wall of the rotating tube 61. A spring 68 is fixedly installed between the clamping plate 64 and the rotating tube 61. Place the screw or long rod inside the rotating tube 61, rotate the rotating tube 61, and drive the convex ring 65 to rotate along the thread inside the fixed sleeve 6 through the guide groove 67 and guide block 66, so that the convex ring 65 moves upward. When the convex ring 65 moves upward, it abuts against the clamping plate 64, and moves synchronously towards the center of the rotating tube 61 under the action of the guide hole 62 and guide rod 63. Under the self-locking action of the thread, it can clamp screws of different radii, etc., and ensure that the axis of the screw or other object is located on the plane of the semi-circular protractor 21 when clamped, thereby ensuring the accuracy of the measurement results and avoiding errors caused by axis offset. Rotating the rotating tube 61 in the opposite direction can release the clamping, and the clamping plate 64 will reset under the action of the second spring 68.

[0026] like Figures 8 to 10 As shown, the fixing assembly includes a mounting ring 7 fixedly installed at the center of the other end of the semi-circular protractor 1. A mounting plate 71 is rotatably mounted inside the mounting ring 7. A connecting plate 72 is fixedly mounted at the other end of the mounting plate 71. A gripping component is provided on the connecting plate 72. Several positioning teeth 73 arranged in a circular array are fixedly installed on the inner side wall of the mounting ring 7. Two clearance grooves 74 are symmetrically opened on the mounting plate 71. Positioning blocks 75 adapted to the positioning teeth 73 are slidably installed in the clearance grooves 74. The positioning blocks 75 and A spring 76 is fixedly installed between the clearance grooves 74; the grip assembly includes a fixed frame 8 fixedly installed on the connecting plate 72, a movable arm 81 is slidably installed in the fixed frame 8, a handle 82 is fixedly installed at the other end of the movable arm 81, a number of spherical grooves 83 are provided on the inner side wall of the fixed frame 8 in a linear array, a sliding groove 84 is provided on the movable arm 81, a fixing pin 85 adapted to the spherical groove 83 is slidably installed in the sliding groove 84, and a spring 86 is fixedly installed between the fixing pin 85 and the sliding groove 84; The handle 82 can be rotated to drive the connecting plate 72 and the mounting plate 71 to rotate. Under the action of the positioning tooth 73, the positioning block 75 slides along the relief groove 74, thereby adjusting the angle of the handle 82. This allows it to be used in conjunction with the rotation of the semi-circular protractor 21, avoiding interference with the rotation of the semi-circular protractor 21 when measuring angles. Under the action of the spring 76, the positioning block 75 will only slide when a certain torque is applied, thereby adjusting the angle of the handle 82. During measurement, the handle 82 can stably maintain its fixed posture, ensuring a stable fixing method. By applying external force by pulling outward or pressing inward, the fixing pin 85 slides under the action of the ball groove 83 and the spring 86, thereby adjusting the length of the extended movable arm 81, thus changing the grip length and making it easier to fix and use.

[0027] The technical solution provided by this invention involves placing the semicircular protractor 1 perpendicular to the horizontal plane and parallel to the longitudinal axis of the body. At this point, the long rod for placing the acetabular cup or pedicle screw to be measured is placed inside the rotating tube 61. Rotating the rotating tube 61 causes the convex ring 65 to rotate along the thread inside the fixed sleeve 6 via the guide groove 67 and guide block 66, causing the convex ring 65 to move upwards. When the convex ring 65 moves upwards, it abuts against the clamping plate 64, and under the action of the guide hole 62 and guide rod 63, it moves synchronously towards the center of the rotating tube 61. The self-locking action of the thread enables clamping of screws of different radii, ensuring that the axis of the screw or other object is located on the plane of the semicircular protractor 21 during clamping, thereby ensuring the accuracy of the measurement results and avoiding errors caused by axis offset. Reversing the rotating tube 61 releases the clamping, and the clamping plate 64 resets under the action of the second spring 68. Rotating the coarse adjustment ring 43 drives the internal gear ring 44 to rotate, which in turn drives the drive gear 42 to rotate, thereby driving the adjusting gear ring 4. The movable semi-circular protractor 21 rotates around the fixed shaft 2. When the desired angle is reached, the fine adjustment knob 49 can be rotated to drive the fine adjustment gear 48 to rotate, which in turn drives the reduction gear 47 to rotate. Through the connecting shaft 46, the drive gear 42 is driven to rotate the adjusting gear ring 4, thereby adjusting the angle. Because the large angular velocity of rotating the fine adjustment knob 49 is transmitted as linear velocity through the action of the fine adjustment gear 48 and the reduction gear 47, and the angular velocity is proportionally reduced by the radius ratio, the angle adjustment of the semi-circular protractor 21 is smaller when the fine adjustment knob 49 is rotated significantly. This achieves more precise adjustment, improves the accuracy of measurement, and ensures the effect of surgery. Furthermore, the semi-circular protractor 21 is tightly connected to the fixed shaft 2 through the damping pad 3, and can be suspended at any angle during rotation. When the damping pad 3 is worn and the damping is too small to maintain suspension or too large to make adjustment inconvenient, the pressure between the damping pad 3 and the fixed shaft 2 can be increased or decreased by adjusting the bolt 31 to adjust the tightness.

[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0029] Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A three-dimensional angle measuring instrument for surgical procedures, characterized in that, Includes measurement units and functional units; The measuring unit includes a semicircular protractor (1), a fixed shaft (2) is fixedly installed at the center of the semicircular protractor (1), and a semi-ring protractor (21) is rotatably mounted on the fixed shaft (2). The semi-ring protractor (21) is concentrically arranged with the semicircular protractor (1). The functional unit includes a damping pad (3) that is slidably installed between the semi-circular protractor (21) and the fixed shaft (2). A threaded hole is provided on the semi-circular protractor (21) at a position corresponding to the damping pad (3), and an adjusting bolt (31) is screwed into the threaded hole. The fixed shaft (2) is provided with an adjustment component, the semi-circular protractor (21) is provided with a measuring component, and the semi-circular protractor (1) is provided with a fixing component.

2. The surgical three-dimensional angle measuring instrument according to claim 1, characterized in that, The adjustment assembly includes an adjustment gear ring (4) fixedly installed at the corresponding position of the semi-circular protractor (21) and the fixed shaft (2). A fixed ring (41) is fixedly fitted on one end of the fixed shaft (2) extending out of the semi-circular protractor (21). A drive gear (42) meshing with the adjustment gear ring (4) is rotatably installed on the fixed ring (41). A coarse adjustment ring (43) is rotatably fitted on the fixed ring (41). An internal gear ring (44) meshing with the drive gear (42) is fixedly installed on one end of the coarse adjustment ring (43) extending out of the fixed ring (41). A fine adjustment assembly is provided on the fixed shaft (2).

3. The surgical three-dimensional angle measuring instrument according to claim 2, characterized in that, The fine-tuning assembly includes a through hole (45) on the fixed ring (41) and corresponding to the drive gear (42). A connecting shaft (46) is rotatably installed in the through hole (45). One end of the connecting shaft (46) is fixedly connected to the drive gear (42), and a reduction gear (47) is fixedly installed at the other end of the connecting shaft (46). A fine-tuning gear (48) that meshes with the reduction gear (47) is rotatably installed on the fixed shaft (2), and a fine-tuning knob (49) is fixedly installed on the fine-tuning gear (48).

4. The surgical three-dimensional angle measuring instrument according to claim 1, characterized in that, The measuring component includes a C-shaped clamp (5) that is slidably mounted on the semi-circular protractor (21). A pressure plate (51) is slidably mounted on the inner side wall of the clamp (5). A spring (52) is fixedly mounted between the pressure plate (51) and the inner bottom wall of the clamp (5). Several biting teeth (53) are evenly fixedly mounted on the inner top wall of the clamp (5). A clamping component is provided on the outer top wall of the clamp (5).

5. A three-dimensional angle measuring instrument for surgical procedures according to claim 4, characterized in that, A convex lens (54) is fixedly installed at the notch of the card block (5), and a positioning line (55) is fixedly provided on the convex lens (54) along the radial direction of the semi-circular protractor (21).

6. A three-dimensional angle measuring instrument for surgical procedures according to claim 5, characterized in that, A sliding ring (56) is slidably mounted on the semi-circular protractor (21), and a flexible strip (57) is fixedly mounted on the sliding ring (56) along the radial direction of the semi-circular protractor (21).

7. A three-dimensional angle measuring instrument for surgical procedures according to claim 4, characterized in that, The clamping assembly includes a fixed sleeve (6) fixedly installed on the outer top wall of the clamping block (5), a rotating tube (61) rotatably installed on the fixed sleeve (6), three guide holes (62) arranged in a ring array on the rotating tube (61), a guide rod (63) slidably installed in the guide hole (62), a clamping plate (64) fixedly installed at one end of the guide rod (63) extending into the rotating tube (61), a protruding ring (65) screwed into the fixed sleeve (6), a guide block (66) fixedly installed on the top of the protruding ring (65), a guide groove (67) adapted to the guide block (66) is opened on the inner side wall of the rotating tube (61), and a spring (68) is fixedly installed between the clamping plate (64) and the rotating tube (61).

8. A three-dimensional angle measuring instrument for surgical procedures according to claim 1, characterized in that, The fixing component includes a mounting ring (7) fixedly installed at the center of the other end of the semi-circular protractor (1). A mounting plate (71) is rotatably installed inside the mounting ring (7). A connecting plate (72) is fixedly installed at the other end of the mounting plate (71). A gripping component is provided on the connecting plate (72). Several positioning teeth (73) arranged in a ring array are fixedly installed on the inner side wall of the mounting ring (7). Two clearance grooves (74) are symmetrically opened on the mounting plate (71). A positioning block (75) adapted to the positioning teeth (73) is slidably installed in the clearance groove (74). A spring (76) is fixedly installed between the positioning block (75) and the clearance groove (74).

9. A three-dimensional angle measuring instrument for surgical procedures according to claim 8, characterized in that, The grip assembly includes a fixed frame (8) fixedly mounted on the connecting plate (72), a movable arm (81) slidably mounted inside the fixed frame (8), a handle (82) fixedly mounted at the other end of the movable arm (81), a plurality of spherical grooves (83) arranged in a linear array on the inner side wall of the fixed frame (8), a sliding groove (84) is provided on the movable arm (81), a fixing pin (85) adapted to the spherical groove (83) is slidably mounted inside the sliding groove (84), and a spring (86) is fixedly mounted between the fixing pin (85) and the sliding groove (84).

10. A three-dimensional angle measuring instrument for surgical procedures according to claim 1, characterized in that, A bubble level (9) is fixedly installed on the semi-circular protractor (1).

Images