Large-angle quantitative bending rod bender

Abstract

The invention belongs to the field of medical instruments, and discloses a large-angle quantitative bending bar bender which comprises a fixed handle and a movable handle which are connected with a pivot, and the fixed handle and the movable handle are located on the two sides of the pivot and are in pivot connection through the pivot. The pivot is arranged on the fixed handle and the movable handle; the bending arm comprises a first bending arm moving synchronously with the fixed handle and a second bending arm moving synchronously with the movable handle, the second bending arm and the movable handle are located on the two sides of the pivot, and the first bending arm and the second bending arm are connected in a pivoted mode through the pivot; the gear shifting disc is arranged between the fixed handle and the movable handle and comprises clamping teeth arranged on a pivot, a first check block, a second check block, a first sliding groove and a second sliding groove, wherein the first check block and the second check block are fixedly connected to the fixed handle through a pin shaft and oppositely arranged on the two sides of the pivot, and the first sliding groove and the second sliding groove are oppositely arranged on the two sides of the pivot and incline inwards. And the baffle block is pivotally connected to the sliding chute through a pin shaft. When the rod bending device bends the connecting rod at a large angle, the connecting rod can be bent to an accurate angle.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a large-angle quantitative bending rod bender. Background Art

[0002] Posterior spinal rod fixation is the main method for treating spinal orthopedic diseases. In order to adapt to the physiological curvature of the human spine, the connecting rod needs to be bent and shaped during the operation. Due to differences in individual physiological curvatures, the angles required to bend the connecting rods are different. At this time, an instrument that can quantify the bending angle and radian is needed to meet the clinical needs of the operation. Especially in spinal deformity correction surgery, the degree of spinal deformity of patients varies and the connecting rods need to be bent and shaped at a large angle. At the same time, the quantitative control of the bending process is more stringent. Otherwise, the fatigue life of the connecting rod is likely to decrease due to excessive folding during the operation, which ultimately leads to clinical accidents. Summary of the invention

[0003] The present invention is proposed based on the above-mentioned requirements of the prior art. The technical problem to be solved by the present invention is to bend the connecting rod to a precise angle when the connecting rod is bent and shaped at a large angle.

[0004] In order to solve the above problems, the technical solution provided by the present invention includes: a large-angle quantitative bending rod bender, characterized in that it includes: a handle, the handle includes a fixed handle pivotally connected to a pivot, and a movable handle fixedly connected to the pivot, the fixed handle and the movable handle are pivotally connected through the pivot, and the fixed handle and the movable handle are located on both sides of the pivot;

[0005] A pivot, arranged on the fixed handle and the movable handle; a bending arm, the bending arm comprising a first bending arm that moves synchronously with the fixed handle, and a second bending arm that moves synchronously with the movable handle, the second bending arm and the movable handle are respectively located on both sides of the pivot, the first bending arm and the second bending arm are pivotally connected via the pivot; and a shift plate, arranged between the fixed handle and the movable handle, the shift plate having a locking gear position, a left-rotation gear position and a right-rotation gear position.

[0006] Preferably, a first clamping seat is provided at the free end of the first bending arm, and a second clamping seat is provided at the free end of the second bending arm, the first clamping seat clamps the first part of the connecting rod, and the second clamping seat clamps the second part of the connecting rod.

[0007] Preferably, a glass bead is arranged on the first bending arm, and a glass bead limiting groove is arranged on the shift plate, and the glass bead cooperates with the limiting groove.

[0008] Preferably, the glass bead limiting groove comprises a first limiting groove, a second limiting groove and a third limiting groove. When the glass bead cooperates with the first limiting groove, the shift plate is in a locked gear position; when the glass bead cooperates with the second limiting groove, the shift plate is in a left-hand gear position; when the glass bead cooperates with the third limiting groove, the shift plate is in a right-hand gear position.

[0009] Preferably, a glass bead is arranged on the second bending arm, a glass bead limiting groove is arranged on the pivot, the glass bead and the limiting groove cooperate with each other, and the second bending arm is installed on the pivot by plugging and unplugging.

[0010] Preferably, a rotating pointer is provided on the second bending arm, and a scale line is provided on the first bending arm.

[0011] Preferably, the rotating pointer includes a first rotating pointer and a second rotating pointer, wherein the first rotating pointer points to the scale line to display the angle of the bent connecting rod when the connecting rod is bent in a clockwise direction when the second bending arm rotates clockwise, and the second rotating pointer points to the scale line to display the angle of the bent connecting rod when the connecting rod is bent in a counterclockwise direction when the second bending arm rotates counterclockwise.

[0012] Preferably, the shift plate includes: a latch tooth, the latch tooth is arranged on the pivot, a block, the block is fixedly connected to the fixed handle by a pin, the block includes a first block and a second block, the first block and the second block are relatively arranged on both sides of the pivot, the slide slot includes a first slide slot and a second slide slot, the first slide slot and the second slide slot are relatively arranged on both sides of the pivot, the upper parts of the first slide slot and the second slide slot are both inclined inwardly, the first block is pivotally connected to the first slide slot by the pin, and the second block is pivotally connected to the second slide slot by the pin, and in the locking gear position, the first block and the second block clamp the latch tooth from the left and right sides; in the left-hand gear position, the first block clamps the left side of the latch tooth, and the second block is separated from the right side of the latch tooth; in the right-hand gear position, the first block is separated from the left side of the latch tooth, and the second block clamps the right side of the latch tooth.

[0013] Preferably, the first stopper and the second stopper include a first part and a second part, the first pin shaft passes through the first part and is arranged in a blind hole on the end surface of the first bending arm close to the shift plate; the second pin shaft passes through the second part and is arranged in the slide groove.

[0014] Preferably, a torsion spring is arranged on the first pin shaft on the first stopper and the second stopper.

[0015] Compared with the prior art, the bent connecting rod of the present invention can fit the physiological curvature of the patient's corrected spine as closely as possible, thereby ensuring reasonable coordination between the various correction components, better dispersing the load, reducing stress concentration, thereby improving the stability and safety of supporting the spine and achieving better treatment effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 2. It is a front view of a large-angle quantitative bending rod bender in a specific embodiment of the present invention;

[0018] Figure 2 is a structural diagram of the first card seat in a specific implementation manner of the present invention;

[0019] Figure 3 is a structural diagram of a shift plate in a specific embodiment of the present invention;

[0020] Figure 4 is a structural diagram of a shift plate in a locked gear position in a specific embodiment of the present invention;

[0021] Figure 5 is a structural diagram of a shift plate in a left-hand gear position in a specific embodiment of the present invention;

[0022] Figure 6 is a structural diagram of a shift plate in a clockwise gear position in a specific embodiment of the present invention;

[0023] Figure 7 is a structural diagram of a stopper in a specific embodiment of the present invention;

[0024] Figure 8 is a structural diagram of a glass bead in a first bending arm in a specific embodiment of the present invention;

[0025] Fig. 9 It is a structural diagram of a rotating pointer in a specific implementation manner of the present invention.

[0026] Reference numerals:

[0027] 1. Fixed handle; 2. Movable handle; 3. Pivot; 4. First bending arm; 4-1. First clamping seat; 4-2. First clamping slot; 4-3. First fixing piece; 4-4. Glass bead; 5. Second bending arm; 5-1. Second clamping seat; 5-2. Second clamping slot; 5-3. Second fixing piece; 6. Shift plate; 6-1. Slide slot; 6-2. Glass bead limiting slot; 6-2-1. First limiting slot; 6-2-2. Second limiting slot; 6-2-3. First limiting slot; 7. Stopper; 7-1. Stopper body; 7-2. First pin shaft; 7-3. Second pin shaft; 7-4. Torsion spring; 8. Gear; 9. Rotating pointer; 9-1. First rotating pointer; 9-2. Second rotating pointer; 10. Gear pointer; 11. Scale line. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection, a mechanical connection, an electrical connection or a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The terms “at the bottom”, “at the top”, and “at the top” as used throughout the text refer to relative positions of components of a device and have nothing to do with their orientation in space.

[0031] To facilitate understanding of the embodiments of the present invention, specific embodiments will be further explained below in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present invention.

[0032] In the operation for treating spinal orthopedic diseases, such as scoliosis, the scoliotic spine is usually corrected to a normal position, and then fixed to the spine by a connecting rod and a nail rod, so that the corrected spine maintains a normal shape. The connecting rod provides necessary support for the spine, which is conducive to maintaining the stability of the spine after correction, so that the spine will be more stable after correction, reducing the risk of deformation again.

[0033] However, due to the differences in individual spinal physiological curvatures, the required bending angles of the connecting rods are different. In this case, the connecting rods need to be bent quantitatively to meet the clinical needs of the surgery.

[0034] Furthermore, since excessive bending of the connecting rod easily leads to a decrease in the fatigue life of the connecting rod, the quantitative bending degree in the bending process has a higher precision. The precise bending degree of the connecting rod can ensure that the bent connecting rod fits the physiological curvature of the patient's spine as closely as possible after correction, thereby ensuring the reasonable coordination between the various correction components, better dispersing the load, reducing stress concentration, thereby improving the stability and safety of the supporting spine, and achieving a better treatment effect.

[0035] To this end, in this case, the present specific embodiment provides a large-angle quantitative bending rod bender, which can not only bend the connecting rod at a large angle to shape it, but also bend the connecting rod to a precise angle. The structure of the large-angle quantitative bending rod bender is as follows: Figure 1 As shown, the large-angle quantitative bending rod bender includes a handle, a pivot and a bending arm.

[0036] The structure of the large-angle quantitative bending rod bender is as follows: Figure 1 As shown, the handle includes a fixed handle 1 and a movable handle 2, and the top ends of the fixed handle 1 and the movable handle 2 are pivotally connected by a pivot 3, so that the movable handle 2 can rotate around the pivot 3 relative to the fixed handle 1. Specifically, the movable handle 2 can be fixedly connected to the pivot 3, and the fixed handle 1 can be pivotally connected to the pivot 3. Further, the movable handle 2 and the fixed handle 1 can be arranged along the front-to-back direction, and the top end of the fixed handle 1 is provided with an axial hole, and the pivot 3 is provided in the axial hole to provide a rotational connection between the fixed handle 1 and the pivot 3. Furthermore, the pivot 3 can also be connected to the axial hole through a bearing to facilitate smoother rotation.

[0037] The lower ends of the fixed handle 1 and the movable handle 2 are both provided with a gripping portion, the shape of which is adapted to the human hand, for example, a relatively wide size is provided at a position corresponding to the middle of the human hand, so that the human hand can grip firmly, thereby being able to stably transmit the force to the arm. The relatively wide shape of the gripping portion can be achieved by a rubber sleeve.

[0038] The top of the fixed handle 1 is fixedly connected to the first bending arm 4, and the top of the movable handle 2 is connected to the second bending arm 5, and the second bending arm 5 and the movable handle 2 are respectively located on both sides of the pivot 3. The first bending arm 4 moves synchronously with the fixed handle 1, and the second bending arm 5 moves synchronously with the movable handle 2. When the fixed handle 1 and the movable handle 2 rotate relative to each other, the first bending arm 4 and the second bending arm 5 are driven to move accordingly, thus forming two levers with the pivot 3 as the fulcrum. The length of the fixed handle 1 is greater than the length of the first bending arm 4, and the length of the movable handle 2 is greater than the length of the second bending arm 5, so that it is more labor-saving to bend the connecting rod through the first bending arm 4 and the second bending arm 5.

[0039] The first bending arm 4 and the second bending arm 5 have a fixed end and a free end, and the fixed ends of the first bending arm 4 and the second bending arm 5 are pivotally connected via the pivot 3, so that the second bending arm 5 can rotate around the pivot 3 relative to the first bending arm 4. Furthermore, the second bending arm 5 can be installed with the pivot 3 in the front-back direction by plugging and unplugging, and the second bending arm 5 can be detachably fixed to the pivot 3 by the glass bead cooperating with the glass bead limiting groove on the pivot 3, and different specifications of second bending arms 5 can be replaced, and different specifications of second bending arms 5 have different turning radii, which can conveniently bend the connecting rods with different angle requirements.

[0040] The free end of the first bending arm 4 is provided with a first clamping seat 4-1, and the first clamping seat 4-1 can rotate relative to the free end of the first bending arm 4. The free end of the second bending arm 5 is provided with a second clamping seat 5-1, and the second clamping seat 5-1 can rotate relative to the free end of the second bending arm 5. The first clamping seat 4-1 clamps the first part of the connecting rod, and the second clamping seat 5-1 clamps the second part of the connecting rod, so as to clamp the connecting rod on the first bending arm 4 and the second bending arm 5.

[0041] Specifically, taking the first deck 4-1 as an example, Figure 2As shown, the first card seat 4-1 is provided with a first card slot 4-2, the first card slot 4-2 penetrates the first card seat 4-1 in a direction parallel to the first bending arm 4, and the first card slot 4-2 has a front opening and two side openings formed by penetrating the first card seat 4-1. Among them, the size of the two side openings of the first card slot 4-2 is larger than the size of the middle space of the first card slot 4-2, thereby facilitating the smooth insertion of the connecting rod into the first card slot 4-2, that is, the connecting rod penetrates from the opening on one side of the first card slot 4-2, passes through the middle space of the first card slot 4-2, and then passes out from the opening on the other side. In this process, while the first part of the connecting rod is clamped in the middle position of the first card slot 4-2, a deformation space is reserved for the bending of the connecting rod, so that the part of the connecting rod covered by the two sides of the first card slot 4-2 can form a smooth curvature during the bending process, so that the curvature of the connecting rod conforms to the physiological curvature of the human body as much as possible. Furthermore, the front opening size of the first card slot 4-2 is smaller, while the internal space of the first card slot 4-2 is larger, which prevents the connecting rod from escaping from the first card slot 4-2 and increases the safety when bending the connecting rod.

[0042] The second card seat 5 - 1 is provided with a second card slot 5 - 2 , and the structure of the second card slot 5 - 2 is the same as that of the first card slot 4 - 2 , which will not be described in detail here.

[0043] The first card holder 4-1 is connected to the free end of the first bending arm 4 by cooperating with the first fixing member 4-3. When the cooperation relationship between the first card holder 4-1 and the first fixing member 4-3 is released, the first card holder 4-1 can be rotated relative to the first bending arm 4, so that the first card slot 4-2 and one of the openings on both sides of the second card slot 5-2 are arranged opposite to each other, and the connecting rod can pass through the first card slot 4-2 and the second card slot 5-2 in sequence, and then the first card holder 4-1 is fastened to the first fixing member 4-3. Similarly, the second card holder 5-1 is connected to the free end of the second bending arm 5 by cooperating with the second fixing member 5-3. The shape of the second fixing member 5-3 is the same as that of the first fixing member 4-3, and it is not repeated here.

[0044] Furthermore, taking the first fixing member 4-3 as an example, the first fixing member 4-3 is preferably formed as a bolt, so as to provide a larger bite force to fix the first clamping seat 4-1 to the free end of the first bending arm 4, thereby preventing the first clamping seat 4-1 from loosening relative to the first bending arm 4 when the fixed handle 1 and the movable handle 2 are pinched to drive the first bending arm 4 and the second bending arm 5 to rotate relative to each other to bend the connecting rod, thereby maintaining the stability of the connection between the first clamping seat 4-1 and the first bending arm 4.

[0045] Furthermore, taking the first clamping seat 4-1 as an example, the first clamping seat 4-1 has a forward protrusion relative to the first bending arm 4, and the first clamping slot 4-2 is arranged on the first clamping seat 4-1 at a side away from the first bending arm 4. The protrusion, on the one hand, makes the first clamping slot 4-2 for clamping the connecting rod have a distance from the first bending arm 4 in the front-to-back direction, and the second clamping slot 5-1 also has a forward protrusion relative to the first bending arm 4. In addition, the connecting rod clamped on the bender has a distance from the first bending arm 4 and the second bending arm 5 in the front-to-back direction, thereby preventing the first bending arm 4 and the second bending arm 5 from interfering with the connecting rod during the bending process of the connecting rod, thereby affecting the accurate bending of the connecting rod. On the other hand, the protrusion makes the first socket 4-1 and the second socket 5-1 have the same position in the front-to-back direction, thereby limiting the connecting rod in a vertical plane extending along the left-right direction and the up-down direction. When the load applied to the handle is transmitted to the first socket 4-1 and the second socket 5-1, it is convenient to accurately bend the connecting rod to the desired angle.

[0046] In this specific embodiment, since the first bending arm 4 moves synchronously with the fixed handle 1, and the second bending arm 5 moves synchronously with the movable handle 2, when the fixed handle 1 and the movable handle 2 are pinched, the movable handle 2 drives the second bending arm 5 to rotate relative to the first bending arm 4 through the pivot 3, and the connecting rod is subjected to the force and bends accordingly.

[0047] Furthermore, the distance between the movable handle 2 and the second bending arm 5 in the front-to-rear direction is greater than the distance between the first bending arm 4 and the second bending arm 5, thereby forming a space in the front-to-rear direction for accommodating the shift plate 6 of the directional bending connecting rod.

[0048] The shift plate 6 is used to directional bend the connecting rod, that is, to bend the connecting rod in different directions at different gear positions. Furthermore, if the connecting rod needs to be bent back to repair the bending angle, the bending angle of the connecting rod can be adjusted by switching the gear position of the shift plate, and then the bending angle of the connecting rod can be corrected to the required angle without first disassembling the connecting rod and then reinstalling it in reverse.

[0049] Specifically, the shift plate 6 is connected to the pivot 3, as shown in FIG. Figure 3 As shown, the gears are switched by rotating the shift plate 6, and the gears include a locking gear, a left-rotation gear, and a right-rotation gear. Further, in order to more clearly indicate to the operator which gear the bender is in, a gear pointer 10 is preferably provided at a position corresponding to the gear on the first bending arm 4. When the gear pointer 10 points to different gears, it indicates that the bender is in the corresponding gear. At this time, the bender can only perform bending work in the corresponding gear.

[0050] When the fixed handle 1 and the movable handle 2 are pinched at different positions, the second bending arm 5 can be driven to rotate in a specific direction around the pivot 3 relative to the first bending arm 4, thereby bending the connecting rod in a preset direction, thereby preventing the bending shape of the connecting rod from deviating from the surgical requirements and bending back, thereby reducing the impact on the quality of the connecting rod due to incorrect bending direction.

[0051] The shift plate 6 is provided with a block 7 and a gear 8. The block 7 is relatively arranged on both sides of the shift plate 6. The gear 8 is relatively fixedly connected to the pivot 3. The gear 8 moves synchronously with the pivot 3. The block 7 is distributed on both sides of the gear 8. The block 7 on both sides is engaged with or separated from the gear 8 by rotating the shift plate 6. When the block 7 on both sides is engaged with the gear 8, the block 7 restricts the gear 8 from rotating, thereby restricting the pivot 3 from rotating. At this time, the bender is in the locked gear position, and the connecting rod cannot be bent. Figure 5 As shown; when the left stopper 7 is engaged with the gear 8 and the right stopper 7 is separated from the gear 8, the stopper 7 limits the gear 8 to rotate clockwise, thereby limiting the pivot 3 to rotate clockwise. At this time, the bender is in the left-hand gear position and can only bend the connecting rod in the counterclockwise direction. Figure 6 As shown; when the left stopper 7 is separated from the gear 8, and the right stopper 7 is engaged with the gear 8, the stopper 7 limits the gear 8 to rotate counterclockwise, thereby limiting the pivot 3 to rotate clockwise. At this time, the bender is in the right-hand gear position and can only bend the connecting rod in the clockwise direction. Figure 7 shown.

[0052] An axial hole is provided in the middle of the shift plate 6, and the pivot 3 is provided in the axial hole. An O-shaped rubber gasket is preferably provided between the axial hole of the shift plate 6 and the pivot 3 to prevent wear.

[0053] The stopper 7 is as Figure 7As shown, the block 7 includes a block body 7-1, a first pin 7-2, and a second pin 7-3. The first pin 7-2 is arranged in the through hole of the first part of the block body 7-1 along the front-to-back direction, and then arranged in the blind hole of the end face of the first bending arm 4 close to the shift plate 6. The second pin 7-3 is arranged in the through hole of the second part of the block body 7-1 along the front-to-back direction, and then arranged in the slide groove 6-1 of the shift plate 6 close to the first bending arm 4. The slide groove 6-1 is relatively arranged on both sides of the pin 3, and the upper part of the slide groove 6-1 is inclined inward, that is, the distance between the upper position of the slide groove 6-1 and the gear 8 is smaller than the distance between the lower position of the groove 6-1 and the gear 8.

[0054] Preferably, a torsion spring 7-4 may be provided on the first pin shaft 7-2, and an opening for accommodating the torsion spring 7-4 may be provided on the block body 7-1.

[0055] When the shift plate 6 is rotated to the locked gear position, the gear position pointer 10 points to the locked gear position, and the shift plate 6 is in a locked state, that is, the bender is in a locked state. At this time, the state of the internal components of the shift plate 6 is as follows: Figure 4 As shown, the block 7 is located in the first position, that is, the second pin shaft 7-3 is located in the middle position of the slide groove 6-1, and the block 7 clamps the gear 8 from the left and right sides. The block 7 limits the gear 8 from rotating in the clockwise or counterclockwise direction from the left and right sides, so that the gear 8 cannot rotate, and the second bending arm 5 cannot be driven to rotate. At this time, the rod bender is locked and the connecting rod cannot be bent.

[0056] When the shift plate 6 is in the locked gear position, the shift plate 6 is rotated counterclockwise, and the gear position pointer 10 switches from pointing to the locked gear position to pointing to the left-hand gear position. When the shift plate 6 is switched to the left-hand gear position, the state of the internal components of the shift plate 6 is as follows: Figure 5 As shown. During the switching process, the slide slot 6-1 in the shift plate 6 drives the block 7 from the first position to the second position through the second pin shaft 7-3. The second position is the upper limit position of the left second pin shaft 7-3 located in the left slide slot 6-1. In the second position, the second part of the block 7 on the left side is clamped with the left side of the gear 8, and the second part of the block 7 on the right side is separated from the right side of the gear 8. At this time, the distance from the center of gravity of the left block 7 to the clamping position of the second part of the left block 7 and the gear 8 is greater than the distance from the center of gravity of the block 7 to other positions of the second part of the left block 7. Therefore, in the second position, the block 7 restricts the gear 8 from rotating clockwise, thereby restricting the pivot 3 from rotating clockwise. At this time, the bender is in the left-hand gear position and can only bend the connecting rod in the counterclockwise direction.

[0057] When the shift plate 6 is in the locked gear position, a load is applied to rotate the shift plate 6 clockwise, and the gear pointer 10 switches from pointing to the locked gear position to pointing to the right-hand gear position. When the shift plate 6 switches to the right-hand gear position, the state of the internal components of the shift plate 6 is as follows: Figure 6 As shown. In this switching process, the slide 6-1 in the shift plate 6 drives the block 7 from the first position to the third position through the second pin shaft 7-3. The third position is that the left second pin shaft 7-3 is located at the upper limit position of the left slide 6-1, and the right second pin shaft 7-3 is located at the lower upper limit position of the right slide 6-1. In the third position, the second part of the block 7 on the left is separated from the gear 8, and the second part of the block 7 on the right is clamped with the gear 8. At this time, the distance from the center of gravity of the right block 7 to the clamping position of the second part of the right block 7 and the gear 8 is greater than the distance from the center of gravity of the block 7 to other positions of the second part of the right block 7. Therefore, in the third position, the block 7 limits the counterclockwise rotation of the gear 8, thereby limiting the counterclockwise rotation of the pivot 3. At this time, the bender is in the right-hand gear position and can only bend the connecting rod in the clockwise direction.

[0058] Preferably, a glass bead limiting groove 6-2 is provided on the plane of the shift plate 6 close to the first bending arm 4, and the glass bead limiting groove 6-2 cooperates with the glass bead 4-4 provided at the corresponding position of the plane of the first bending arm 4 close to the shift plate 6, such as Figure 8 Specifically, when the shift plate 6 is in the locked gear position, the glass bead 4-4 cooperates with the first limiting groove 6-2-1 located in the middle; when the shift plate 6 is in the left-hand gear position, the glass bead 4-4 cooperates with the second limiting groove 6-2-2 located on the left; when the shift plate 6 is in the right-hand gear position, the glass bead 4-4 cooperates with the third limiting groove 6-2-3 located on the right, so as to prevent the gear position from being incompletely switched when the shift plate 6 is switched, thereby affecting the clamping effect of the block 7 and the gear 8.

[0059] Furthermore, a rotating pointer 9 and a scale line 11 are provided at the position where the second bending arm 5 rotates relative to the first bending arm 4. The rotating pointer 9 is provided on the second bending arm 5, and the scale line 11 is provided on the first bending arm 4. Correspondingly, the scale line 11 may also be provided on the second bending arm 5 and the rotating pointer 9 is on the first bending arm 4. The rotating pointer 9 points to the scale in the scale line 11, indicating the rotation angle of the second bending arm 5 relative to the first bending arm, that is, the bending angle of the connecting rod. Furthermore, the rotating pointer 9 is preferably provided with a first rotating pointer 9-1 and a second rotating pointer 9-2 at the position where the second bending arm 5 rotates relative to the first bending arm 4, as Fig. 9 As shown, the first rotating pointer 9-1 can display the angle of the connecting rod when the connecting rod is bent in the clockwise direction when the second bending arm 5 rotates clockwise, and the second rotating pointer 9-2 can display the angle of the connecting rod when the connecting rod is bent in the counterclockwise direction when the second bending arm 5 rotates counterclockwise, so that the angle of the connecting rod bending can be displayed in the case of clockwise or counterclockwise rotation. Further, since bending the connecting rod in the clockwise direction is more common, the size of the first rotating pointer 9-1 is preferably larger than the size of the second rotating pointer 9-2.

[0060] Since clinical surgery for spinal deformity may require a connecting rod that is bent at a large angle, at this time, under the action of the human hand load, the interval between the fixed handle 1 and the movable handle 2 in the left-right direction gradually decreases, and the fixed handle 1 and the movable handle 2 approach each other in the left-right direction. However, until the interval between the fixed handle 1 and the movable handle 2 in the left-right direction disappears, the connecting rod may not be bent to the target angle, so it is necessary to apply a load to make the fixed handle 1 and the movable handle 2 deviate from each other in the left-right direction, and at this time, the fixed handle 1 and the movable handle 2 will cross each other, which is not convenient for applying force.

[0061] In this case, the movable handle 2 is preferably detachably connected to the pivot 3, so that when the connecting rod needs to be bent at a large angle, the movable handle 2 can be pre-set at a position farther away from the fixed handle 1 in the left-right direction, thereby reserving a distance for the fixed handle 1 and the movable handle 2 to be driven closer to each other by hand, preventing the phenomenon of crossing the hands during the bending process, and making the operation more comfortable.

[0062] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large-angle quantitative bending rod bender, characterized in that: include: A handle, the handle comprising a fixed handle pivotally connected to the pivot, and a movable handle fixedly connected to the pivot, the fixed handle and the movable handle are pivotally connected via the pivot, and the fixed handle and the movable handle are located on both sides of the pivot; A pivot, arranged on the fixed handle and the movable handle; A bending arm, the bending arm comprising a first bending arm that moves synchronously with the fixed handle, and a second bending arm that moves synchronously with the movable handle, the second bending arm and the movable handle are respectively located on both sides of the pivot, and the first bending arm and the second bending arm are pivotally connected through the pivot; and a shift plate, which is arranged between the fixed handle and the movable handle, and the shift plate has a locking gear position, a left-rotation gear position and a right-rotation gear position.

2. A large-angle quantitative bending rod bender according to claim 1, characterized in that: A first clamping seat is disposed at the free end of the first bending arm, and a second clamping seat is disposed at the free end of the second bending arm. The first clamping seat clamps the first part of the connecting rod, and the second clamping seat clamps the second part of the connecting rod.

3. A large-angle quantitative bending rod bender according to claim 1, characterized in that: A glass bead is arranged on the first bending arm, and a glass bead limiting groove is arranged on the shift plate, and the glass bead cooperates with the limiting groove.

4. A large-angle quantitative bending rod bender according to claim 3, characterized in that: The glass bead limiting groove includes a first limiting groove, a second limiting groove and a third limiting groove. When the glass bead cooperates with the first limiting groove, the shift plate is in a locked gear position; when the glass bead cooperates with the second limiting groove, the shift plate is in a left-hand gear position; when the glass bead cooperates with the third limiting groove, the shift plate is in a right-hand gear position.

5. A large-angle quantitative bending rod bender according to claim 1, characterized in that: A glass bead is arranged on the second bending arm, a glass bead limiting groove is arranged on the pivot, the glass bead and the limiting groove cooperate with each other, and the second bending arm is installed with the pivot by plugging and unplugging.

6. A large-angle quantitative bending rod bender according to claim 1, characterized in that: A rotating pointer is arranged on the second bending arm, and a scale line is arranged on the first bending arm.

7. A large-angle quantitative bending rod bender according to claim 6, characterized in that: The rotating pointer includes a first rotating pointer and a second rotating pointer. When the second bending arm rotates clockwise, the first rotating pointer points to the scale line to display the angle of the bent connecting rod when the connecting rod is bent in a clockwise direction to display the angle of the bent connecting rod. When the second bending arm rotates counterclockwise, the second rotating pointer points to the scale line to display the angle of the bent connecting rod when the connecting rod is bent in a counterclockwise direction to display the angle of the bent connecting rod.

8. The large-angle quantitative bending rod bender according to claim 1 is characterized in that: The shift plate comprises: A latching tooth, wherein the latching tooth is arranged on the pivot, The stopper is fixedly connected to the fixed handle through a pin shaft, and the stopper includes a first stopper and a second stopper, and the first stopper and the second stopper are arranged on both sides of the pivot shaft. The slide groove comprises a first slide groove and a second slide groove, the first slide groove and the second slide groove are arranged on both sides of the pivot shaft, the upper parts of the first slide groove and the second slide groove are arranged to be inclined inward, the first stopper is pivotally connected to the first slide groove through a pin shaft, and the second stopper is pivotally connected to the second slide groove through a pin shaft. In the locking gear, the first block and the second block clamp the latch tooth from the left and right sides; in the left-hand gear, the first block clamps the left side of the latch tooth, and the second block is separated from the right side of the latch tooth; in the right-hand gear, the first block is separated from the left side of the latch tooth, and the second block clamps the right side of the latch tooth.

9. A large-angle quantitative bending rod bender according to claim 8, characterized in that: The first stopper and the second stopper include a first part and a second part. The first pin shaft penetrates the first part and is arranged in a blind hole of the end surface of the first bending arm close to the shift plate. The second pin shaft penetrates the second part and is arranged in the slide groove.

10. A large-angle quantitative bending rod bender according to claim 8, characterized in that: A torsion spring is arranged on the first pin shaft on the first stopper and the second stopper.

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