Convenient high-rigidity healthy side pelvis fixing device

Abstract

The invention discloses a convenient high-rigidity healthy side pelvis fixing device which comprises a support assembly and a branch chain device, a three-fold hole position plate of the support assembly is specifically arranged, and all parts of the branch chain device are integrally arranged; the whole device has the advantages of being high in structural rigidity, rapid and convenient to operate, high in adaptability, high in flexibility, good in compatibility and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a convenient and high-rigid healthy-side pelvic fixation device. Background Art

[0002] Pelvic fractures are very serious bone traumas, usually caused by high-energy violence such as falling from heights and traffic accidents. Pelvic fractures are usually more complicated. From an anatomical point of view, they can be divided into the healthy pelvis (i.e. the pelvis on the side without fracture) and the affected pelvis (the pelvis on the fracture side). And because the pelvis is rich in soft tissues such as muscles, the force generated by the deformation of the soft tissue after the fracture will affect the morphology and stability of the fractured half pelvis. During the closed reduction of pelvic fractures, the affected pelvis is often connected to the output end of the reduction device or reduction robot, while the healthy pelvis is often fixed to the operating table by a healthy fixation device. However, existing healthy pelvic fixation devices generally have problems such as insufficient overall rigidity, poor flexibility, inconvenient adjustment, and even interference with fluoroscopy and affecting the doctor's intraoperative operation. These deficiencies not only cause inconvenience to the doctor's operation and reduce the efficiency of the operation, but also affect the fixation effect of the healthy pelvis, thereby affecting the reduction accuracy and increasing the patient's recovery period and medical risks.

[0003] Chinese invention patent publication CN115634033B discloses a fracture reduction mechanism for minimally invasive pelvic fracture surgery, which discloses a healthy side fixation assembly, which supports the healthy side of the pelvis by providing components such as a support slider and a support vertical shaft. However, this technical solution focuses on the lightness of the overall reduction mechanism, which ensures operability, but the stiffness and stability and coordination with it need to be improved.

[0004] Therefore, there is an urgent need to propose a high-rigidity and easy-to-operate healthy-side pelvic fixation device. This device should meet the following key requirements: high rigidity to ensure the stability of healthy-side pelvic fixation; adjustability to adapt to the anatomical structure and screw placement of different patients; ease of operation, the design should be convenient for doctors to quickly and easily install and remove, reducing surgical time and patient discomfort; stability, the fixation mechanism needs to be able to provide sufficient stability to ensure that the healthy-side pelvis does not move during the reduction process, thereby providing a reliable fulcrum for the reduction of the fractured hemipelvis. Such a design will help improve reduction accuracy, optimize the surgical process, and ultimately improve the patient's treatment effect and rehabilitation experience. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a convenient and high-rigidity healthy-side pelvic fixation device.

[0006] A convenient and high-rigid healthy-side pelvic fixation device comprises a bracket assembly and a branch chain device.

[0007] The bracket assembly is used to be fixed to the side of the operating bed and to fix multiple branch chain devices; the bracket assembly includes a support unit for fixing the bracket assembly to the side of the operating bed and a three-fold hole plate for fixing multiple branch chain devices, the three-fold hole plate includes a first side plate, a middle plate and a second side plate, which are all perpendicular to the bed plate of the operating bed and connected to each other, the middle plate is arranged between the first side plate and the second side plate, and the angle between the first side plate and the middle plate is α, and the angle between the second side plate and the middle plate is β, satisfying 25°<α<38° and 25°<β<38°; and a plurality of through holes of a truncated cone structure are provided on the first side plate, the middle plate and the second side plate, the diameter of the through hole facing the inner side of the operating bed (that is, the inner side of the three-fold hole plate) is greater than the diameter away from the operating bed (that is, the outer side of the three-fold hole plate); and the through holes on the first side plate and the second side plate are arranged in an elliptical shape, and the through holes on the middle plate are arranged in a circular shape with multiple centers coinciding.

[0008] The branch chain device includes a branch chain locking assembly, a telescopic adjustment assembly, a rotation adjustment assembly and an anti-falling assembly.

[0009] One end of the branch chain locking assembly is connected to the telescopic adjustment assembly, and the other end is respectively inserted into the through holes of the first side plate, the middle plate and the second side plate, so as to connect the branch chain device to the three-fold hole plate.

[0010] The other end of the telescopic adjustment component is connected to the rotation adjustment component for adjusting the length of the branch chain device.

[0011] The other end of the rotation adjustment component is connected to the anti-falling component and is used to adjust the angle between the end of the branch chain device and the holding screw.

[0012] The other end of the anti-falling component is connected to the holding screw and is used for clamping the holding screw and connecting to the healthy side pelvis.

[0013] Preferably, three sets of branch chain devices are provided, which are respectively arranged on the first side plate, the middle plate and the second side plate.

[0014] Preferably, the through holes on the first side plate and the second side plate are arranged in an elliptical shape, and the diameter of the ellipse in the vertical direction is larger than the diameter in the horizontal direction.

[0015] Preferably, the through holes on the first side plate and the second side plate are arranged in an elliptical shape, and the ratio between the diameter of the ellipse in the vertical direction and the diameter in the horizontal direction is (1.8-4.5):(0.9-1.1).

[0016] Preferably, α and β are equal or unequal, and the first side panel and the second side panel are closer to the operating table than the middle panel (ie, the first side panel and the second side panel are folded inward rather than outward relative to the middle panel).

[0017] Preferably, the support unit of the bracket assembly includes at least two locking screws, at least two locking handles, at least two clamping blocks, at least one U-shaped support and at least two support blocks; the U-shaped support is a horizontal "U" shape, including an upper horizontal plate, a lower horizontal plate and a connecting vertical plate, and the "U"-shaped opening can be inserted into the operating bed board through the side of the operating bed, and the three-fold hole plate is vertically arranged on the upper horizontal plate above the operating bed, and the support block is further arranged between one side or both sides of the three-fold hole plate and the upper horizontal plate, and the support block is used to strengthen the connection between the three-fold hole plate and the upper horizontal plate to avoid changes in the connection angle between the two; the locking screw is provided with an external thread, and passes through the lower horizontal plate through the internal threaded through hole provided in the lower horizontal plate, and the top end of the locking screw is rotatably connected to the clamping plate provided between the lower horizontal plate and the operating bed board, and the bottom end of the locking screw is provided with the locking handle.

[0018] Preferably, each of the branch chain locking components includes at least one ball joint, at least one conical seat and at least one anti-loosening nut; the outer surface of the middle section of the conical seat matches the inner surface size and shape of the through hole of the frustum structure, and the conical seat passes through the through hole of the frustum structure, and the end with a larger diameter of the conical seat is arranged on the inner side of the three-fold hole plate and a spherical hole is arranged inside, and the spherical hole is used to accommodate the ball joint (providing three degrees of rotational freedom for the branch chain unit, and as a passive pair, it can move slightly when impacted to reduce the damage to the healthy side pelvis caused by the impact), and the conical seat with a smaller diameter is arranged on the outer side of the three-fold hole plate and the anti-loosening nut is screwed onto the outside.

[0019] Preferably, each of the telescopic adjustment components includes at least one ball hinge connector, at least one telescopic cylinder, at least one spring clamp, at least one locking nut and at least one telescopic rod; one end of the ball hinge connector is connected to the ball hinge of the branch chain locking assembly, and the other end is connected to the telescopic cylinder; the interior of the telescopic cylinder is hollow for receiving the telescopic rod, and an elastic clamp is provided between the telescopic cylinder and the telescopic rod, and the locking nut is sleeved on the outside of the elastic clamp and the telescopic rod, and the starting end of the telescopic rod can pass through the locking nut and the spring clamp and extend into the interior of the telescopic cylinder, and the locking nut is tightly pressed against the elastic clamp and the telescopic rod by being tightened with the telescopic cylinder, thereby fixing the relative displacement of the telescopic rod and the telescopic cylinder (the telescopic rod can change the extension length according to the position of the holding screw and cooperate with the telescopic cylinder to adjust the length of the branch chain unit).

[0020] Preferably, the telescopic rod includes a rod-shaped portion and a column tooth portion, the rod-shaped portion is located at the starting end of the telescopic rod, the column tooth portion is located at the end of the telescopic rod, the rod-shaped portion is connected to the outer circumference of the column tooth portion, a bottom edge portion of the column tooth portion is provided with teeth, and an axial center hole is provided at the axis center of the column tooth portion.

[0021] Preferably, each of the rotation adjustment components includes at least one needle nut, at least one needle clamp, at least one end toothed disc and at least one slotted bolt; the needle nut cooperates with the needle clamp to clamp the holding screw (the holding screw is locked by extending the holding screw into the needle clamp and tightening the needle nut, and the holding screw is connected to the bone being operated through a thread); the end toothed disc is fixed to the side of the needle clamp through the back, and teeth are provided at the edge of the face of the end toothed disc, and the teeth of the end toothed disc can engage with the teeth of the column teeth (used to adjust the angle between the end of the branch chain unit and the holding screw, and the locking of the rotation of the end of the branch chain unit is completed by engaging the teeth on the surface of the end toothed disc with the teeth of the telescopic rod column teeth), a through hole is provided at the axis of the end toothed disc, and the slotted bolt has a circumferential groove near the tail end, and the slotted bolt can pass through the axial hole and the through hole and abut against the side of the needle clamp.

[0022] Preferably, each of the anti-falling components includes at least one compression spring and at least one anti-falling rod; the anti-falling rod includes a rod cap end, a long rod portion and a shaft step end, and the two ends of the long rod portion are respectively connected to the rod cap end and the shaft step end; grooves are provided on the back of the end gear disc and the side of the needle clamp, and after the end gear disc and the needle clamp are fixed, the relative grooves form an anti-falling rod accommodating groove that can accommodate the anti-falling rod, the diameter of the outer edge of the anti-falling rod accommodating groove is smaller than the diameter of the center portion, and the anti-falling rod accommodating groove and the end gear disc are respectively provided with grooves. The through holes are perpendicular to each other; the compression spring is sleeved on the outside of the anti-falling rod and is accommodated in the anti-falling rod accommodating groove together with the anti-falling rod, the bottom of the compression spring is abutted against the upper surface of the axial step end of the anti-falling rod, and the lower surface of the outer edge of the anti-falling rod accommodating groove of the compression spring is abutted, and the outer diameter of the axial step end of the anti-falling rod is less than or equal to the width of the circumferential groove of the slotted bolt (the compression spring and the anti-falling rod form a self-locking mechanism, which is used to prevent the slotted bolt from falling off and ensure the locking effect of the rotation adjustment assembly).

[0023] The beneficial technical effects of the present invention are:

[0024] 1. The present invention is a fixing device specifically for the healthy side pelvis. It is adapted to the specific structure, position and specific conditions of the healthy side pelvis, and by setting a three-fold hole plate with a specific three-fold structure, and by setting the angle between the three-fold plates and the through-hole arrangement method, the two folded surfaces of the three-fold hole plate in the device have elliptical distribution mounting holes, and the middle surface has circular distribution mounting holes. The appropriate hole position can be selected as needed to install the branch chain device, and the first side plate and the second side plate are set at a specific angle to the middle plate, so that the two folded surfaces on the outside are folded inward so that the branch chain device can be closer to the holding screw, shortening the length of the branch chain device, thereby increasing the overall structural rigidity of the device, so that the branch chain device installed thereon and the corresponding holding screw can be more conveniently connected, and the branch chain device extended from three angles can be more conveniently and efficiently connected to the healthy side pelvis, ensuring that the telescopic adjustment components of multiple sets of branch chain devices can be relatively small adjusted to achieve fixation of the pelvis in three dimensions, and can also strengthen the rigidity of the fixing device for fixing the healthy side pelvis. Compared with existing healthy side pelvic fixation devices, this device solves the problems of low rigidity, poor adaptability and inconvenient operation of existing devices. The present invention has the characteristics of high overall structural rigidity, fast and convenient operation, strong adaptability, high flexibility and good compatibility.

[0025] 2. The present invention provides a through hole with a truncated cone structure on the three-fold hole plate, so that the branch chain device can be more firmly fixed to the bracket assembly. Since the branch chain device needs to rotate frequently, the through hole and the components that match the through hole are very easy to wear. If other through holes are used, the fit will not be tight after wear. However, by providing a through hole with a truncated cone structure with a larger inner hole and a smaller outer hole, when there is a slight wear, it only needs to further tighten the anti-loosening nut to continue to maintain high stability. The combination of the two, with the bracket assembly specifically provided by the present invention, is installed on the side of the operating table with high rigidity. The bracket assembly ensures the stability of the device and ensures that the healthy side pelvis does not move during the reduction process. The device has good overall stability and high structural rigidity.

[0026] 3. The present invention arranges the branch chain device in an integral manner in conjunction with the specific bracket assembly, so that the device as a whole is easy to operate and has strong adaptability. The bracket assembly of the device enables the device as a whole to move over a wide range, thereby improving the overall adaptability of the device. Each branch chain device of the device adopts a ball joint, a telescopic adjustment assembly and a rotation adjustment assembly, which can provide a wide range of spatial postures for the holding screw clamp to accommodate different types of pelvic fractures in patients. The ball joint provides a wide range of rotation angles for each branch chain; the telescopic adjustment assembly can quickly adjust the length of the branch chain and complete the locking; the rotation adjustment assembly can quickly adjust the connection between the needle clamp and the holding screw and complete the locking. The design of the ball joint and each adjustment assembly improves the ease of operation of the device, allowing users to quickly and easily install and disassemble, reducing operation time and patient discomfort.

[0027] By combining the specific configuration of the bracket assembly with the specific configuration of multiple sets of branch chain devices, the overall device is highly flexible. Even when only one or two branches are locked, the pelvis can still move. The user can adjust the position of the healthy pelvis within a small range based on the actual installation of the first two needles to improve the operation effect. When all three branches are locked, the overall degree of freedom of the device is zero, and the fixation of the healthy pelvis is completed. The overall device has high compatibility. Due to the relatively flexible configuration of each component, the compatibility of the overall device is greatly improved. The device of the present invention is compatible with other surgical instruments and equipment, facilitating joint use during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an axonometric diagram of a convenient and high-rigidity healthy-side pelvic fixation device of the present invention.

[0029] Figure 2 Schematic diagram of the structure of a bracket assembly according to one embodiment.

[0030] Figure 3 Schematic diagram of the structure of a branch chain locking assembly according to one embodiment.

[0031] Figure 4 for Figure 3 A partial cross-sectional schematic diagram of the connecting portion at A.

[0032] Figure 5 This is a schematic structural diagram of the combination and explosion of a telescopic adjustment component in one embodiment.

[0033] Figure 6 Schematic diagram of the structure of a rotation adjustment assembly according to one embodiment.

[0034] Figure 7 A schematic diagram of the exploded structure of a rotary adjustment assembly according to one embodiment.

[0035] Figure 8 It is a schematic cross-sectional structural diagram of an anti-falling component in one embodiment.

[0036] Among them: 1- bracket assembly, 2- branch chain locking assembly, 3- telescopic adjustment assembly, 4- rotation adjustment assembly, 5- anti-fall assembly, 6- holding screw, 7- operating table board;

[0037] 8-locking screw, 9-locking handle, 10-clamping block, 11-U-shaped support, 111-upper horizontal plate, 112-lower horizontal plate, 113-connecting vertical plate; 12-support block, 13-three-fold hole plate; 131-first side plate; 132-middle plate; 133-second side plate; 134-through hole;

[0038] 14-ball joint, 15-conical seat, 16-locking nut;

[0039] 17-ball hinge connector, 18-telescopic cylinder, 19-spring chuck, 20-locking nut, 21-telescopic rod, 211-rod-shaped portion, 212-column tooth portion;

[0040] 22-needle nut, 23-needle clamp, 24-end gear plate, 25-slotted bolt, 251-circumferential groove;

[0041] 26-anti-falling rod, 261-rod cap end, 262-long rod portion, 263-shaft step end, 264-anti-falling rod receiving groove, 27-compression spring. DETAILED DESCRIPTION

[0042] The present invention is described in detail below with reference to the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present invention.

[0043] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for the purposes of describing the embodiments of the present application herein.

[0044] In this application, when the terms "comprise" and "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and or combinations thereof. In this specification and claims, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", "far", "near" and the like indicate directions or positional relationships based on the directions shown in the drawings or the actual positional relationships in use. They are only relative terms determined for the convenience of describing the structural relationships of the various components or elements of the present disclosure. They do not specifically refer to any component or element in the present disclosure and cannot be understood as limitations on the present disclosure. They also limit the position and direction relationships during transportation and other uses. In this specification and claims, terms such as "fixed", "connected", "connected", "provided with", "equipped with" and the like should be understood in a broad sense, indicating that they can be fixedly connected, integrally connected or detachably connected; they can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in this disclosure according to specific circumstances, and they cannot be understood as limitations on the present disclosure.

[0045] Example 1

[0046] This embodiment provides a retractable multi-degree-of-freedom healthy side pelvic fixation device, such as Figures 1 to 7As shown, the device includes a bracket assembly 1 and a branch chain device, and the branch chain device includes a branch chain locking assembly 2, a telescopic adjustment assembly 3, a rotation adjustment assembly 4, and an anti-falling assembly 5.

[0047] like Figure 1 As shown, the healthy-side pelvic fixation device is mounted on the side of the operating bed 7 and utilizes the bracket assembly 1 for overall movement. The bracket assembly 1 is also used for mounting the branch chain device, moving along the side of the operating bed 7, and raising and lowering the device perpendicular to the top of the operating bed 7. The healthy-side pelvic fixation device comprises three branch chain devices. Before locking, a single branch chain device has multiple degrees of freedom. After locking, multiple branch chain devices constrain each other and form a rigid structure with the healthy-side pelvis, firmly securing the healthy-side pelvis to the operating bed 7. The branch chain locking assembly 2 is fixed to the bracket assembly and is used to mount the telescopic adjustment assembly 3, providing three rotational degrees of freedom for the end of the branch chain device. The telescopic adjustment assembly 3 is fixed to the branch chain locking assembly 2, providing the branch chain device with a telescopic function. The rotation adjustment assembly 4 is mounted on the left end of the telescopic adjustment assembly 2 and is used to adjust the angle between the end of the branch chain device and the holding screw 6. The various components of the branch chain device work together to adjust the position of the end of the branch chain device to quickly and stably clamp the holding screw 6.

[0048] like Figure 1 、 Figure 2 and Figure 3 As shown, the bracket assembly 1 includes a locking screw 8, a locking handle 9, a clamping block 10, a U-shaped support 11, a support block 12, and a tri-fold hole plate 13. The locking screw 8 drives the clamping block 10 to press against the bottom surface of the operating bed 7 by rotating the locking handle 9; the U-shaped support 11 presses against the top and side of the operating bed 7 and cooperates with the clamping block 10 to ensure the stability of the healthy side pelvic fixation device; the support block 12 is used to improve the strength and stability of the tri-fold hole plate 13; the three surfaces of the tri-fold hole plate 13 are all machined with tapered holes (i.e., through holes of a truncated cone structure), as shown in FIG. Figure 1 and Figure 2 As shown, the tapered holes on the two side surfaces are arranged in an elliptical pattern, with the vertical diameter of the ellipse being 3.75 times its horizontal diameter. The tapered holes on the middle surface are arranged in a circular pattern, used to mount the branch chain assembly and provide movement along the sides of the operating table 7 and elevation perpendicular to the top surface of the table 7. The angles between the first side and middle plate of the tri-fold hole plate 13, as well as the angle between the middle plate and the second side plate, are both inwardly folded at 30°, reducing the length of the branch chain assembly, thereby reducing the lever arm and increasing its rigidity.

[0049] like Figure 1 、 Figure 3 and Figure 4As shown, the branch chain locking assembly 2 includes a ball joint 14, a conical seat 15, and a locknut 16. The ball joint 14 is installed in the conical seat 15, providing the branch chain device with three rotational degrees of freedom. As a passive pair, it can move slightly when impacted to reduce damage to the healthy pelvis. The conical seat 15 is used to install the branch chain device and the three-fold hole plate 13. The conical surface of the conical seat 15 can closely fit the conical hole surface of the three-fold hole plate 13 to ensure the stability of the branch chain device. The locknut 16 is used to fix the branch chain locking assembly 2.

[0050] like Figure 1 and Figure 5 As shown, the telescopic adjustment assembly 3 includes a ball joint connector 17, a telescopic cylinder 18, a spring collet 19, a locking nut 20, and a telescopic rod 21. The ball joint connector 17 is mounted on the ball joint 14 for mounting the telescopic cylinder 18. The telescopic cylinder 18 is mounted on the ball joint connector 17 to provide space for the telescopic rod 21 to extend and retract. The spring collet 19 cooperates with the locking nut 20 to lock the telescopic rod 21. The telescopic rod 21 can adjust the length of the branch chain device by adjusting the extension length of the telescopic cylinder 18 according to the position of the holding screw.

[0051] like Figure 1 and Figure 6 、 Figure 7 As shown, the rotation adjustment assembly 4 includes a pin nut 22, a pin clamp 23, an end toothed disc 24, and a slotted bolt 25. The pin nut 22 cooperates with the pin clamp 23 to clamp the holding screw 6; the end toothed disc 24 is mounted on the surface of the pin clamp 23 and cooperates with the slotted bolt 25 and the telescopic rod 21 to adjust the angle between the end of the branch chain device and the holding screw 6. The teeth on the surface of the end toothed disc 24 engage with the teeth on the surface of the telescopic rod 21 to achieve the rotational locking of the end of the branch chain device.

[0052] like Figure 1 and Figure 8 As shown, the anti-falling assembly 5 includes a compression spring 26 and an anti-falling rod 27. The compression spring 26 and the anti-falling rod 27 form a self-locking mechanism, which is installed between the end gear plate 24 and the needle clamp 23 to prevent the slotted bolt 25 from falling off and ensure the locking effect of the rotation adjustment assembly 4.

[0053] The specific implementation steps of this embodiment are as follows: first, according to the actual position requirements, the bracket assembly 1 is installed on the side of the surgical bed board 7, and the clamping block 10 is pressed against the bottom surface of the surgical bed board 7 by rotating the locking handle 9 and cooperating with the locking screw 8, thereby completing the fixation of the bracket assembly 1 on the surgical bed board 7 to ensure the stability of the healthy side pelvic fixation device; then, the branch chain device composed of the branch chain locking assembly 2, the telescopic adjustment assembly 3, the rotation adjustment assembly 4, and the anti-falling assembly 5 are assembled, and the appropriate hole positions are selected on the three-fold hole plate 13, and the conical seat 15 in the branch chain locking assembly 2 is respectively inserted into the through holes of the frustum structure on the first side plate, the middle plate and the second side plate, and the anti-loosening nut 16 is tightened to complete the fixation of the branch chain; then, the needle clamp 23 in the rotation adjustment assembly 4 is assembled with the holding screw 6, and the position of the needle clamp 23 in the holding screw 6 and the position of the telescopic rod 21 in the telescopic cylinder 18 are adjusted. , rotate the meshing position of the teeth between the end gear plate 24 and the telescopic rod column teeth, ensure that the teeth of the end gear plate 24 mesh with the column teeth of the telescopic rod 21, and then screw in the slotted bolt 25. The anti-falling rod 26 in the anti-falling assembly 5 is first lifted up. After the slotted bolt 25 is tightened, the bottom of the anti-falling rod 26 enters the groove of the slotted bolt 25, completing the self-locking (locking angle position) of the rotation adjustment assembly; secondly, tighten the needle nut 22 in the rotation adjustment assembly 4 (the position of locking and holding screw 6) and the locking nut 20 in the telescopic adjustment assembly 3 (locking length position) to complete the locking of the single branch chain device; finally, repeat the above-mentioned locking steps of the first set of branch chain devices on the second set of branch chain devices to complete the locking of the second set of branch chain devices, fine-tune the final position of the healthy side pelvis and the branch chain device, and then repeat the above-mentioned locking steps of the first set of branch chain devices to complete the locking of the third set of branch chain devices to complete the fixation of the healthy side pelvis.

[0054] Through the specific settings of this embodiment, the following are achieved: 1) The structural stability is excellent. The overall rigidity of the device is significantly improved through the inward folding design of the two sides of the three-fold hole plate and the on-demand layout of the branch chain device; 2) The operation is convenient and efficient. The various adjustment components work together to achieve rapid adjustment of the position of the end of the branch chain device, so as to clamp the holding screw quickly and stably; 3) It has strong adaptability and can flexibly adjust the length and angle of the branch chain to meet the healthy side pelvic fixation needs of different patients; 4) It is flexible to use and supports step-by-step locking. After a single or two branch chains are locked, the pelvic position can still be adjusted, which is convenient for adjusting the pelvic position according to actual conditions during surgery; 5) It has good compatibility and can be used in conjunction with conventional surgical instruments to improve surgical efficiency.

[0055] Comparative Example 1

[0056] The other settings of this comparative example are the same as those of Example 1, except that a three-fold hole plate is not provided, but a straight plate is directly provided. After the branch chain device is clamped and tightened to the tapered hole on the straight plate, a comparative operation is performed with a simulated pelvis, and it is found that the extended length of the side branch chain device is more than twice that of the middle branch chain device. After locking, the simulated pelvis is moved hard, and it is found that the straight plate slides slightly, which proves that the specific three-fold plate provided in the present invention can accurately match the pelvis, greatly reducing the length difference between the three branch chain devices and improving the rigidity of the fixation.

[0057] Comparative Example 2

[0058] The other settings of this comparative example are the same as those of Example 1, except that the angles between the first side plate and the middle plate and the second side plate and the middle plate of the three-fold hole plate are set to 60°. After the branch chain devices are clamped and tightened to the tapered holes on each plate, comparative operations are performed with a simulated pelvis. It is found that the three branch chain devices have a small degree of freedom of rotation. When fixing the holding screws of the simulated pelvis, it takes nearly twice as long to fix it with the holding screws and achieve the fixation of the pelvis, which proves that the specific three-fold plate set in the present invention can accurately match the pelvis, and the specific angle setting increases the degree of freedom and thus improves the working efficiency.

[0059] Comparative Example 3

[0060] The other configurations of this comparative example are identical to those of Example 1, except that the arrangement of the tapered holes on the first and second side panels is not elliptical, but rather a circular arrangement with multiple coincident centers, similar to that of the middle panel. Comparative operation using a simulated pelvis revealed that to maintain the stability of the three branching devices and maintain a similar length, when both α and β are set to 30°, the installation positions on the first and second side panels essentially need to be maintained at the outer circular position at the top and the middle circular position at the side. Other positions result in relatively longer side branching devices, thus affecting rigidity. Furthermore, the excessive number of through-holes in the first and second side panels reduces the overall rigidity of the tri-fold hole-positioning plate, thus affecting the durability and stability of the overall device. This demonstrates that, under the present invention's angled arrangement between the first and second side panels and the middle panel, the elliptical arrangement of the tapered holes in the first and second side panels is the optimal configuration for ensuring both rigidity and stability, and that the two panels also work in close coordination.

[0061] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Technical effects without comparison can be explained through textual description. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A convenient and high-rigidity healthy side pelvic fixation device, characterized in that: including a bracket assembly and a branch chain device; The bracket assembly is used to be fixed to the side of the operating bed and to fix multiple branch chain devices; the bracket assembly includes a support unit for fixing the bracket assembly to the side of the operating bed and a three-fold hole plate for fixing multiple branch chain devices, the three-fold hole plate includes a first side plate, a middle plate and a second side plate, which are all perpendicular to the bed plate of the operating bed and are connected to each other in sequence, and the angle between the first side plate and the middle plate is α, and the angle between the second side plate and the middle plate is β, which satisfies 25°<α<38° and 25°<β<38°; and a plurality of through holes of a frustum structure are provided on the first side plate, the middle plate and the second side plate, the diameter of the through holes facing the side of the operating bed is larger than the diameter on the side away from the operating bed; and the through holes on the first side plate and the second side plate are arranged in an elliptical shape, and on the middle plate, the through holes are arranged in a circular shape with multiple centers coinciding; The branch chain device includes a branch chain locking assembly, a telescopic adjustment assembly, a rotation adjustment assembly and an anti-falling assembly; One end of the branch chain locking assembly is connected to the telescopic adjustment assembly, and the other end is respectively inserted into the through holes of the first side plate, the middle plate and the second side plate, so as to connect the branch chain device to the three-fold hole plate; The other end of the telescopic adjustment assembly is connected to the rotation adjustment assembly for adjusting the length of the branch chain device; The other end of the rotation adjustment component is connected to the anti-falling component, which is used to adjust the angle between the end of the branch chain device and the holding screw; The other end of the anti-falling component is connected to the holding screw and is used for clamping the holding screw and connecting to the healthy side pelvis.

2. The convenient and high-rigidity healthy side pelvic fixation device according to claim 1, characterized in that: The branch chain devices are provided with three sets, which are respectively provided on the first side plate, the middle plate and the second side plate.

3. The convenient and high-rigidity healthy-side pelvic fixation device according to claim 1 or 2, characterized in that: The through holes on the first side plate and the second side plate are arranged in an elliptical shape, and the diameter of the ellipse in the vertical direction is greater than the diameter in the horizontal direction.

4. The convenient and high-rigidity healthy-side pelvic fixation device according to claim 1 or 2, characterized in that: α and β are equal or unequal, and the first side plate and the second side plate are closer to the operating table plate than the middle plate; The through holes on the first side plate and the second side plate are arranged in an elliptical shape, and the ratio between the diameter of the ellipse in the vertical direction and the diameter in the horizontal direction is (1.8-4.5):(0.9-1.1).

5. The convenient and high-rigidity healthy-side pelvic fixation device according to claim 1 or 2, characterized in that: The support unit of the bracket assembly includes a locking screw, a locking handle, a clamping block, a U-shaped support and a support block; the U-shaped support is a horizontal "U" shape, including an upper horizontal plate, a lower horizontal plate and a connecting vertical plate, and the "U"-shaped opening can be inserted into the operating bed board through the side of the operating bed, and the three-fold hole plate is vertically arranged on the upper horizontal plate above the operating bed, and the support block is also arranged between one side or both sides of the three-fold hole plate and the upper horizontal plate, and the support block is used to strengthen the connection between the three-fold hole plate and the upper horizontal plate to avoid changes in the connection angle between the two; the locking screw is provided with an external thread, and passes through the lower horizontal plate through the internal thread through hole provided in the lower horizontal plate, and the top end of the locking screw is rotatably connected to the clamping plate provided between the lower horizontal plate and the operating bed board, and the bottom end of the locking screw is provided with the locking handle.

6. The convenient and high-rigidity healthy-side pelvic fixation device according to claim 5, characterized in that: The branch chain locking assembly includes a ball joint, a conical seat and a lock nut; the outer surface of the middle section of the conical seat matches the inner surface size and shape of the through hole of the frustum structure, and the conical seat passes through the through hole of the frustum structure. The end with a larger diameter of the conical seat is arranged on the inner side of the three-fold hole plate and a spherical hole is arranged inside. The spherical hole is used to accommodate the ball joint, and the conical seat with a smaller diameter is arranged on the outer side of the three-fold hole plate and the lock nut is screwed onto the outside.

7. The convenient and high-rigidity healthy-side pelvic fixation device according to claim 1 or 6, characterized in that: The telescopic adjustment assembly includes a ball hinge connector, a telescopic tube, a spring collet, a locking nut and a telescopic rod; one end of the ball hinge connector is connected to the ball hinge of the branch chain locking assembly, and the other end is connected to the telescopic tube; the interior of the telescopic tube is hollow for receiving the telescopic rod, and an elastic collet is provided between the telescopic tube and the telescopic rod, and the locking nut is sleeved on the outside of the elastic collet and the telescopic rod, and the starting end of the telescopic rod can pass through the locking nut and the spring collet and extend into the interior of the telescopic tube, and the locking nut is tightly pressed against the elastic collet and the telescopic rod by being tightened with the telescopic tube, thereby fixing the relative displacement of the telescopic rod and the telescopic tube.

8. The convenient and high-rigidity healthy-side pelvic fixation device according to claim 7, characterized in that: The telescopic rod includes a rod-shaped portion and a column tooth portion. The rod-shaped portion is located at the starting end of the telescopic rod, and the column tooth portion is located at the end of the telescopic rod. The rod-shaped portion is connected to the outer circumference of the column tooth portion. A tooth is provided on the edge of a bottom surface of the column tooth portion, and an axial hole is provided at the axis center of the column tooth portion.

9. The convenient and high-rigidity healthy-side pelvic fixation device according to claim 8, characterized in that: The rotation adjustment assembly includes a needle nut, a needle clamp, an end toothed disc and a slotted bolt; the needle nut cooperates with the needle clamp to clamp the holding screw; the end toothed disc is fixedly connected to the side of the needle clamp through the back, and meshing teeth are provided at the edge of the face of the end toothed disc, and the meshing teeth of the end toothed disc can engage with the meshing teeth of the column tooth part, and a through hole is provided at the axis of the end toothed disc, and the slotted bolt has a circumferential groove near the tail end, and the slotted bolt can pass through the axial hole and the through hole and abut against the side of the needle clamp.

10. The convenient and high-rigidity healthy-side pelvic fixation device according to claim 9, characterized in that: The anti-falling assembly includes a compression spring and an anti-falling rod; the anti-falling rod includes a rod cap end, a long rod portion and an axial step end, and the two ends of the long rod portion are respectively connected to the rod cap end and the axial step end; grooves are provided on the back of the end gear disc and the side of the needle clamp. After the end gear disc and the needle clamp are fixed, the relative grooves form an anti-falling rod accommodating groove that can accommodate the anti-falling rod. The diameter of the outer edge of the anti-falling rod accommodating groove is smaller than the diameter of the center portion, and the anti-falling rod accommodating groove is perpendicular to the through hole of the end gear disc; the compression spring is sleeved on the outside of the anti-falling rod and is accommodated in the anti-falling rod accommodating groove together with the anti-falling rod. The bottom of the compression spring is abutted against the upper surface of the axial step end of the anti-falling rod, and the lower surface of the outer edge of the anti-falling rod accommodating groove of the compression spring is abutted. The outer diameter of the axial step end of the anti-falling rod is less than or equal to the width of the circumferential groove of the slotted bolt.

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