Pelvis fixing equipment
By designing a pelvic fixation device, the rotation and flipping of the bed board can be achieved through the cooperation of the main drive component and the auxiliary drive component. This solves the problem of large pelvic movement when patients with pelvic fractures get up and turn over, improves patients' self-care ability and reduces the workload of medical staff.
Patent Information
- Application Number
- CN202511226620.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2025-10-31
AI Technical Summary
After a pelvic fracture, the pelvis moves a lot when the patient gets up and turns over, which can easily lead to dislocation. Current technology requires a lot of assistance from medical staff, and patients have long waiting times.
Design a pelvic fixation device, including a fixed support frame, a bed board, and a rotating support frame. Through the cooperation of the main drive component and the auxiliary drive component, the bed board can be rotated and flipped, reducing the range of pelvic movement and assisting the patient in getting out of bed and turning over.
It reduces the range of pelvic movement when patients get up and turn over, reduces the workload of medical staff, improves patients' self-care ability, and reduces the risk of misalignment.
Smart Images
Figure CN120859778A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pelvic fixation, and more specifically to a pelvic fixation device. Background Technology
[0002] Turning over and getting out of bed after a pelvic fracture requires extreme caution and must be done strictly according to the instructions of your doctor and physical therapist. Incorrect movements can lead to fracture displacement, internal fixation failure, nerve and blood vessel damage, or severe pain. During the early stages of fracture healing (usually the first few weeks, the exact time depending on the fracture type, stability, and treatment plan), do not attempt to turn over or get out of bed on your own. For example, getting out of bed typically requires supporting your upper body with your hands, then moving your legs to turn over, and finally getting out of bed. During this process, there is constant relative movement between the pelvis and lower back, and between the pelvis and legs. The pelvic movement is significant and very detrimental to postoperative recovery, easily leading to misalignment.
[0003] Therefore, patients usually need assistance from medical staff or trained caregivers to get out of bed. However, hospital staff and caregivers are often responsible for multiple patients, making it difficult for them to be in two places at once, and patients often have to wait a long time for assistance. Summary of the Invention
[0004] The present invention aims to provide a pelvic fixation device to reduce the range of motion of the pelvis when a patient gets out of bed.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pelvic fixation device, comprising a fixed support frame, a bed board and a rotating support frame, wherein a main drive component is provided on the rotating support frame, the output shaft of the main drive component is connected to the lower part of the bed board, and the output shaft of the main drive component is parallel to the short side of the bed board; In rotation mode, the upper part of the bed board is supported on a fixed support frame, allowing the patient to lie flat on the bed board; The main drive unit rotates the bed board in the forward direction, causing the upper part of the bed board to rise so that the patient can lean against the bed board while standing. The main drive unit drives the bed board to rotate in the opposite direction, returning the bed board to its initial state.
[0006] The beneficial effects of this plan are: 1. This solution improves upon existing hospital beds. Similar to existing bed boards, this solution's bed board also has a long side and a short side. It primarily targets patients with limited mobility after pelvic fracture surgery, reducing the range of pelvic movement when getting out of bed and decreasing the workload for medical staff or caregivers. The main principle is that by directly erecting the bed board, the patient can directly switch from a lying to a standing position. Only the bed sheet needs to be fixed to the bed board, and the top of the bedding needs to be hung on the bed board or the side rails.
[0007] 2. To facilitate patients' walking after getting up, this plan does not include any obstructions at the foot of the bed.
[0008] 3. The rotating support frame serves as both a rotation center and a support, but its durability is insufficient. It is necessary to add a fixed support to bear the main weight of the patient when lying flat and to limit the movement. However, to facilitate rotation, no fixed connection is set between the bed board and the fixed support in this solution, but a detachable connection can be added as needed.
[0009] 4. Since the bed board is usually 400mm-600mm off the ground, in order to prevent the bed board from colliding with the ground after rotating, the rotation center is set as close as possible to the foot of the bed to ensure that there is a gap between the bed board and the ground after rotating.
[0010] Furthermore, an auxiliary drive is provided on the side of the bed board away from the main drive, the output shafts of the auxiliary drive and the main drive are parallel, and an auxiliary gear is connected to the output shaft of the auxiliary drive; an arc-shaped rack is provided on the fixed support frame, the center of the arc-shaped rack is collinear with the output shaft of the main drive, and the arc-shaped rack meshes with the auxiliary gear.
[0011] With this setup, the main drive unit would require a large power and a larger motor to rotate the patient and the bed. Therefore, this solution adds an auxiliary drive unit at the head of the bed, which rotates the head of the bed through the cooperation of an auxiliary gear and an arc rack; while the main drive unit mainly rotates the foot of the bed, reducing costs and saving space.
[0012] Furthermore, the bed board includes an outer frame, within which two flip-up plates are rotatably connected. The two flip-up plates are used to support the left and right halves of the patient's body, respectively; the main drive unit and the outer frame are detachably connected. In rotation mode, the output shaft of the main drive unit is connected to the long side of the outer frame to drive the outer frame to rotate. A limiting part is provided on the lower outer surface of the flip plate to restrict the flip plate from flipping down. In flip mode, the main drive unit separates from the long side of the outer frame, the rotating support frame moves to the short side of the outer shell, and the output shaft of the main drive unit passes through the outer frame and connects to one of the flip plates. The output shaft of the main drive unit and the outer frame are rotatably connected. The flip plate is also long and narrow. The outer side of the flip plate refers to the long side of the flip plate closest to the outer frame; the inner side is the opposite.
[0013] With this setup, patients not only experience greater pelvic movement when getting out of bed, but also need to support their upper body with one hand when turning over. This uneven force distribution between the upper and lower body can easily cause twisting, putting stress on the pelvis and causing significant movement. Generally, when turning over, "axial turning" or "log rolling" is required, which means keeping the entire spine and pelvis moving as a whole, avoiding any twisting, shearing, or separation of the pelvis.
[0014] To achieve the aforementioned axial turning effect while also taking into account the function of getting out of bed, this solution divides the bed board into an outer frame and two flip-over plates inside the outer frame: the outer frame is mainly responsible for the long side rotation function to assist in getting out of bed; the flip-over plates are mainly responsible for the short side turning function, which pushes the patient's body on one side upward by flipping, thereby assisting in turning over.
[0015] However, to achieve the above effects, it is necessary to switch the rotation plane. Therefore, this solution achieves the switching of the rotation plane by moving the rotating support frame, thereby taking into account the auxiliary effects of getting up and turning over.
[0016] Furthermore, a pivot unit is provided on the inner side of the outer frame. The pivot unit includes a first pivot and a second pivot, which are coaxial. Both the first pivot and the second pivot are parallel to the length direction of the flip plate. Both the first pivot and the second pivot are inserted into the flip plate and rotatably connected to the flip plate. The output shaft of the main drive unit is used to pass through the first pivot of the outer frame and connect to one of the flip plates to flip the flip plate.
[0017] Furthermore, the long side of the outer frame is provided with a first connecting hole that runs horizontally through it; the first connecting hole includes a first rotating section, a first moving section and a first engaging section from the outside to the inside, the cross section of the first moving section covers the first rotating section, the first engaging section is provided with internal teeth, and the inner diameter of the first rotating section is smaller than the outer diameter of the first engaging section. The short side of the outer frame is provided with a horizontally penetrating second connecting hole. The second connecting hole includes a second rotating section and a second moving section from the outside to the inside. The second rotating shaft has an annular cross section. The short side of the flip plate is provided with a fixing hole. The fixing hole includes a connecting section and a second meshing section from the outside to the inside. The second rotating shaft is inserted into the connecting section and is rotatably connected to the connecting section. The second rotating section, the second moving section, the interior of the second rotating shaft, and the second meshing section are coaxial and connected in sequence. The second meshing section is provided with internal teeth. The outer diameters of the second rotating shaft and the second meshing section are the same. The cross section of the second moving section covers the second rotating section. The inner diameter of the second rotating section is smaller than the inner diameter of the second rotating shaft. An arc-shaped moving channel connects the first moving segment and the second moving segment. The bottom of the moving channel, the first moving segment, and the second moving segment are all provided with internal teeth. The three internal teeth are continuously arranged to form a bottom internal tooth with an arc-shaped tooth profile. The rotating support frame is equipped with a cylinder. The output shaft of the cylinder is connected to the main drive component. The output shaft of the cylinder and the output shaft of the main drive component are coaxial. The output shaft of the main drive component includes a third rotating section. The third rotating end is provided with a third meshing section. The third meshing section is provided with external teeth in the circumferential direction. In rotary mode, the output shaft of the main drive unit is in the first connecting hole: the third meshing section meshes with the first meshing section, and the third rotating section is rotatably connected to the first rotating section; In the moving mode, the output shaft of the main drive unit moves from the first connecting hole to the second connecting hole: the cylinder drives the third meshing section to retract into the first moving section, the third meshing section meshes with the bottom internal teeth, the main drive unit drives the third meshing section to rotate, and the third meshing section passes through the first moving section, the moving channel and the second moving section in sequence. In the flip mode, the output shaft of the main drive unit is in the second connection hole: the cylinder drives the third engagement section to pass through the second rotating shaft and engage with the second engagement section.
[0018] With this configuration, the cylinder enables the extension and retraction of the main drive shaft, thereby switching between rotary connection and synchronous rotation; the main drive drives the third meshing section to rotate, and the third meshing section meshes with the bottom internal teeth, thereby driving the rotating support frame to move along the moving channel together, that is, the moving channel plays a guiding role here.
[0019] Furthermore, it also includes a sliding base with a groove, which is set according to the movement trajectory of the rotating support frame in the movement mode; the bottom of the rotating support frame is provided with a slider, which is slidably set in the groove, and the rotating support frame is supported on the sliding base.
[0020] With this configuration, the sliding base provides support and guidance for the bottom of the rotating support frame, preventing it from shifting during movement. Attached Figure Description
[0021] Figure 1 This is a front view of the initial state of the rotation mode in the embodiment; Figure 2 for Figure 1 A schematic diagram of the middle bed board after it has been rotated 60°; Figure 3 This is a top view of the rotation mode for an embodiment (the shape of the curved rack is omitted, and only a rectangular diagram is used to illustrate a portion). Figure 4 for Figure 3 Sectional view of the outer frame and flip panel AA in the middle; Figure 5 A top view of the flipped mode of the embodiment; Figure 6 for Figure 5 The outer frame and flip panel BB section view; Figure 7 This is a schematic diagram of the cylinder and main drive component in an embodiment. Detailed Implementation
[0022] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: support frame 1, support plate 11, support leg 12, arc-shaped rack 13, limiting member 14, bed board 2, outer frame 21, flipping plate 22, auxiliary groove 23, auxiliary motor 24, auxiliary gear 25, first rotating shaft 26, second rotating shaft 27, sliding base 3, arc-shaped groove 31, first rectangular base 32, second rectangular base 33, rotating support frame 4, cylinder 41, main drive member 42, connecting member 43, rotation center axis 51, flipping plate center axis 52, bed board center axis 53, first rotating section L1, first moving section L2, first meshing section L3, second rotating section L1', second moving section L2', transition section L4, second meshing section L5, third rotating section L6, and third meshing section L7.
[0023] Example The implementation examples are basically as follows Figures 1-7 The image shows a pelvic fixation device, comprising a fixed support frame 1, a bed board 2, a sliding base 3, and two rotating support frames 4. This embodiment only shows the main structure; supplementary support structures are provided according to actual conditions. In this embodiment, the central axis 53 of the bed board refers to the central axis parallel to the length direction of the bed board 2. All central axes described in this embodiment are parallel to the central axis 53 of the bed board.
[0024] like Figure 1 As shown, the fixed bracket includes a support plate 11, and four support legs 12 are bolted to the four corners of the lower side of the support plate 11. Figure 1 From a medium-angle view, only two of the legs 12 can be seen. An arc-shaped rack 13 is bolted to the left end, the upper surface, and the front and rear sides of the support plate 11. The arc angle of the arc rack 13 is 60°.
[0025] Support plate 11 is used to support the upper part of bed board 2. Figure 1 (Left side of the bed), the bed board 2 is used for the patient to lie flat on, and the lower part of the bed board 2 extends beyond the right edge of the support board 11. Figure 3As shown, the bed board 2 includes an outer frame 21. Two rotating components are provided inside the outer frame 21, symmetrically arranged with respect to the central axis 53 of the bed board. Each rotating component includes a first rotating shaft 26 and a second rotating shaft 27, which are integrally formed with the left and right sides of the inner side of the outer frame 21, respectively. Two flip plates 22 are rotatably connected inside the outer frame 21, supporting the left and right halves of the patient's body. The first rotating shaft 26 and the second rotating shaft 27 are inserted into the left and right sides of the flip plates 22 and rotatably connected to them. The rotation center of the flip plates 22 during rotation is the central axis 51, located between the central axis 52 of the flip plates and the central axis 53 of the bed board. An auxiliary groove 23 is provided at each of the upper and lower corners on the left side of the outer frame 21. An auxiliary motor 24 is bolted into each auxiliary groove 23. An auxiliary gear 25 is keyed to the output shaft of the auxiliary motor 24, and an arc-shaped rack 13 meshes with the auxiliary gear 25. Two limiting members 14 are integrally formed on the front and rear sides of the upper surface of the support plate 11. The limiting members 14 are used to support the outer side of the flip plate 22, that is, the side away from the central axis 53 of the bed board, thereby limiting the swaying of the flip plate 22 in the moving state. In this embodiment, the limiting member 14 is a rectangular strip.
[0026] like Figure 3 As shown, the upper and lower long sides of the outer frame 21 both have horizontal through-holes; as Figure 4 As shown, the first connecting hole includes, from the outside to the inside, a first rotating section L1, a first moving section L2, and a first meshing section L3. The cross-section of the first moving section L2 covers the first rotating section L1. The first meshing section L3 is provided with internal teeth. The inner diameter of the first rotating section L1 is smaller than the outer diameter of the first meshing section L3. like Figure 5 , Figure 6 As shown, the short side of the outer frame 21 has a horizontally penetrating second connecting hole, which includes a second rotating section L1' and a second moving section L2' from the outside to the inside. The second rotating shaft 27 has an annular cross-section, and the short side of the flip plate 22 has a fixing hole, as shown. Figure 6 As shown, the fixing hole includes, from right to left, a connecting section, a second meshing section L5, and a transition section L4. The transition section L4 and the inner cross section of the second rotating shaft 27 are the same. The second rotating shaft 27 is inserted into the connecting section and rotatably connected to the connecting section. The second rotating section L1', the second moving section L2', the transition section L4, the interior of the second rotating shaft 27, and the second meshing section L5 are coaxial and sequentially connected. The second meshing section L5 is provided with internal teeth. The outer diameters of the second rotating shaft 27 and the second meshing section L5 are the same. The cross section of the second moving section L2' covers the second rotating section L1'. The inner diameter of the second rotating section L1' is smaller than the inner diameter of the second rotating shaft 27. An arc-shaped moving channel connects the first moving segment L2 and the second moving segment L2'. The bottom of the moving channel, the first moving segment L2, and the second moving segment L2' are all provided with internal teeth. The three internal teeth are continuously arranged to form a bottom internal tooth with an arc-shaped tooth profile. like Figure 1 , 3 As shown in Figure 5, the sliding base 3 is set on the ground to the right of the fixed bracket, as follows. Figure 3 , 5 As shown, the sliding base 3 is elongated, with its two ends located on the upper and lower sides of the right side of the bed board 2, respectively. A first rectangular base 32 is integrally formed at each end of the curved base. A second rectangular base 33 is integrally formed in the middle of the curved base, located at the right end of the bed board 2. A sliding groove is formed on the upper surface of the curved base, comprising two symmetrical curved grooves 31 about the central axis 53 of the bed board. A portion of the moving channel is parallel and equidistant from the curved grooves 31. One end of each curved groove 31 is located on the first rectangular base 32, and the other ends of the two curved grooves 31 intersect on the second rectangular base 33. The portion of the curved base between the first rectangular base 32 and the second rectangular base 33 is curved. Figure 3 As shown, the right edge of the bed board 2 and the arc-shaped base are shaped and equidistant.
[0027] Two rotating support frames 4 are slidably mounted on two arc-shaped grooves 31, respectively. The rotating support frames 4 are rectangular, and a slider integrally formed on the lower surface of each rotating support frame 4 to match the shape of the arc-shaped groove 31. In this embodiment, the slider is an arc-shaped protrusion, which is slidably mounted within the arc-shaped groove 31. A driving cavity is formed within the rotating support frame 4, such as... Figure 7 As shown, a cylinder 41 is bolted into the drive chamber. A connector 43 is bolted to the right end of the output shaft of the cylinder 41. A main drive component 42 is bolted to the left side of the connector 43. The output shafts of the main drive component 42 and the auxiliary drive component are parallel in direction. The center of the arc-shaped rack 13 is collinear with the output shaft of the main drive component 42. The output shaft of the main drive component 42 includes a third rotating section L6. A third meshing section L7 is provided at the left end of the third rotating section L6. The third meshing section L7 has external teeth in the circumferential direction, that is, the third meshing section L7 is gear-shaped.
[0028] This embodiment is divided into three modes: rotation mode, movement mode, and flipping mode. The rotation mode is used to assist getting in and out of bed, the flipping mode is used to assist turning over, and the movement mode is used to switch between the rotation and flipping modes.
[0029] In rotation mode, the initial state is as follows Figure 1 , Figure 3 As shown, the upper part of the bed board 2 is supported on the fixed support frame 1 so that the patient can lie flat on the bed board 2 and the bed sheet is covered on the bed board 2; the rotating support frame 4 is supported on the first rectangular base 32; the limiting member 14 supports the outside of the flip plate 22 to restrict its flipping down; When getting out of bed, hang the bedding on the left side in a fixed position. The fixed position can be set according to the situation, such as a railing on the side of the bed board 2, or a hook on the left end of the bed board 2. Prepare slippers in advance on the second rectangular base 33. The output shaft of the main drive unit 42 is in the first connecting hole: the third meshing section L7 and the first meshing section L3 are meshed, and the third rotating section L6 and the first rotating section L1 are rotatably connected. The main drive unit 42 drives the outer frame 21 of the bed board 2 to rotate in the forward direction, so that the upper part of the bed board 2 rises and the bed board 2 begins to tilt. In this embodiment, as shown in the figure, Figure 2 As shown, the bed board 2 rotates 60° and stops, the patient slides down the bed and steps on the slippers, the patient stands with their back against the bed board 2, so as to get out of bed; When getting into bed, the patient stands with their back against the bed board 2 and their feet on slippers. The main drive unit 42 drives the bed board 2 to rotate in the opposite direction, so that the bed board 2 returns to its initial state.
[0030] In the moving mode, taking the rotation mode switching to the flip mode as an example, the output shaft of the main drive unit 42 moves from the first connecting hole to the second connecting hole: the cylinder 41 drives the third meshing section L7 to retract into the first moving section L2, the third meshing section L7 meshes with the bottom internal teeth, and the main drive unit 42 drives the third meshing section L7 to rotate. The third meshing section L7 passes through the first moving section L2, the moving channel and the second moving section L2' in sequence. During this process, the main drive unit 42 drives the rotating support frame 4 to slide on the sliding base 3, from the first rectangular base 32 to the second rectangular base 33. When switching from the flip mode to the rotation mode, the above steps are reversed.
[0031] In flip mode, such as Figure 5 As shown, the rotating support frame 4 is supported on the second rectangular base 33; the output shaft of the main drive member 42 is in the second connecting hole: the cylinder 41 drives the third meshing section L7 to pass through the second rotating shaft 27 and mesh with the second meshing section L5, the output shaft of the main drive member 42 passes through the outer frame 21 and is connected to one of the flip plates 22, and the output shaft of the main drive member 42 and the outer frame 21 are rotatably connected.
[0032] When the patient wants to turn over, the drive unit drives the flipping plate 22 to rotate. Because the rotation axis of the flipping plate 22 is eccentrically set, the outer side of the flipping plate 22 flips upward, thereby pushing the patient's body to turn over as a whole.
[0033] In this embodiment, when turning over, the rotating support frame 4 is located at the foot of the bed, but when the patient gets out of bed, the rotating support frame 4 needs to return to the side of the bed, otherwise it will block the patient from getting out of bed.
[0034] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A pelvic fixation device, characterized in that: It includes a fixed support frame, a bed board, and a rotating support frame. The rotating support frame is equipped with a main drive component. The output shaft of the main drive component is connected to the lower part of the bed board, and the output shaft of the main drive component is parallel to the short side of the bed board. In rotation mode, the upper part of the bed board is supported on a fixed support frame, allowing the patient to lie flat on the bed board; The main drive unit rotates the bed board in the forward direction, causing the upper part of the bed board to rise so that the patient can lean against the bed board while standing. The main drive unit drives the bed board to rotate in the opposite direction, returning the bed board to its initial state.
2. The pelvic fixation device according to claim 1, characterized in that: An auxiliary drive is provided on the side of the bed board away from the main drive. The output shafts of the auxiliary drive and the main drive are parallel, and an auxiliary gear is connected to the output shaft of the auxiliary drive. An arc-shaped rack is provided on the fixed support frame. The center of the arc-shaped rack is collinear with the output shaft of the main drive, and the arc-shaped rack meshes with the auxiliary gear.
3. The pelvic fixation device according to claim 2, characterized in that: The bed board includes an outer frame, inside which two flip-up plates are rotatably connected. The two flip-up plates are used to support the left and right halves of the patient's body respectively; the main drive unit and the outer frame are detachably connected. In rotation mode, the output shaft of the main drive unit is connected to the long side of the outer frame to drive the outer frame to rotate. A limiting part is provided on the lower surface of the outer side of the flip plate to restrict the outer side of the flip plate from flipping down. In the flip mode, the main drive unit separates from the long side of the outer frame, the rotating support frame moves to the short side of the outer shell, the output shaft of the main drive unit passes through the outer frame and connects to one of the flip plates, and the output shaft of the main drive unit and the outer frame are rotatably connected.
4. The pelvic fixation device according to claim 3, characterized in that: The inner side of the outer frame is provided with a rotating shaft unit, which includes a first rotating shaft and a second rotating shaft that are coaxial. Both the first rotating shaft and the second rotating shaft are parallel to the length direction of the flip plate. Both the first rotating shaft and the second rotating shaft are inserted into the flip plate and rotatably connected to the flip plate. The output shaft of the main drive unit is used to pass through the first rotating shaft of the outer frame and connect to one of the flip plates to flip the flip plate.
5. The pelvic fixation device according to claim 4, characterized in that: The long side of the outer frame is provided with a first connecting hole that runs horizontally through it; the first connecting hole includes a first rotating section, a first moving section and a first engaging section from the outside to the inside. The cross section of the first moving section covers the first rotating section, and the first engaging section is provided with internal teeth. The inner diameter of the first rotating section is smaller than the outer diameter of the first engaging section. The short side of the outer frame is provided with a horizontally penetrating second connecting hole. The second connecting hole includes a second rotating section and a second moving section from the outside to the inside. The second rotating shaft has an annular cross section. The short side of the flip plate is provided with a fixing hole. The fixing hole includes a connecting section and a second meshing section from the outside to the inside. The second rotating shaft is inserted into the connecting section and is rotatably connected to the connecting section. The second rotating section, the second moving section, the interior of the second rotating shaft, and the second meshing section are coaxial and connected in sequence. The second meshing section is provided with internal teeth. The outer diameters of the second rotating shaft and the second meshing section are the same. The cross section of the second moving section covers the second rotating section. The inner diameter of the second rotating section is smaller than the inner diameter of the second rotating shaft. An arc-shaped moving channel connects the first moving segment and the second moving segment. The bottom of the moving channel, the first moving segment, and the second moving segment are all provided with internal teeth. The three internal teeth are continuously arranged to form a bottom internal tooth with an arc-shaped tooth profile. The rotating support frame is equipped with a cylinder. The output shaft of the cylinder is connected to the main drive component. The output shaft of the cylinder and the output shaft of the main drive component are coaxial. The output shaft of the main drive component includes a third rotating section. The third rotating end is provided with a third meshing section. The third meshing section is provided with external teeth in the circumferential direction. In rotary mode, the output shaft of the main drive unit is in the first connecting hole: the third meshing section meshes with the first meshing section, and the third rotating section is rotatably connected to the first rotating section; In the moving mode, the output shaft of the main drive unit moves from the first connecting hole to the second connecting hole: the cylinder drives the third meshing section to retract into the first moving section, the third meshing section meshes with the bottom internal teeth, the main drive unit drives the third meshing section to rotate, and the third meshing section passes through the first moving section, the moving channel and the second moving section in sequence. In the flip mode, the output shaft of the main drive unit is in the second connection hole: the cylinder drives the third engagement section to pass through the second rotating shaft and engage with the second engagement section.
6. The pelvic fixation device according to claim 5, characterized in that: It also includes a sliding base with a sliding groove, which is set according to the movement trajectory of the rotating support frame in the movement mode; the bottom of the rotating support frame is provided with a slider, which is slidably set in the sliding groove, and the rotating support frame is supported on the sliding base.