Lithotomy position body position frame
Through the electrically driven telescopic arms and flexion and extension mechanism, the problem of large errors and laborious adjustment of the position bed of the amputated position is solved, and rapid and accurate position adjustment and comfort improvement are achieved, and the lower limb venous thrombosis and perineum are alleviated during the operation. Risk of nerve damage.
Patent Information
- Application Number
- CN202420717072.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-09
AI Technical Summary
The existing adjustment method of the amputation position bed has large errors, difficulty, and cannot effectively alleviate the problems of venous thrombosis and common peroneal nerve damage in the lower limbs.
The telescopic arms and flexural extension mechanism are adopted to achieve semi-automatic adjustment of the posture of the body frame through the angle adjustment mechanism, reduce human participation, improve adjustment accuracy and comfort, and promote blood circulation through flexural extension actions.
The patient's position is quickly and accurately adjusted, which reduces the physical energy consumption of medical staff, improves the patient's comfort, and reduces the risk of lower limb venous thrombosis and common peroneal nerve damage during surgery.
Smart Images
Figure CN222130515U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical devices, and in particular to a lithotomy position frame. Background Art
[0002] The lithotomy position is a method of surgical positioning, and a lithotomy position bed is required. The lithotomy position bed currently used in hospitals is provided with a leg frame, which includes axle seats respectively arranged on both sides of the bed and with adjustment knobs, a support rod sleeved in the axle seat and bent, and a leg support arranged on the top of the support rod. The existing bed adopts a pre-adjustment method, that is, the patient's body shape is manually visually measured, and then the posture of the bed is adjusted based on experience using the support rod in the axle seat, thereby adjusting the distance between the leg supports, the lifting height and angle of the leg support, so as to adapt it to the patient's body shape during surgery. However, due to certain errors in the manual visual inspection and operation adjustment methods, the pre-adjustment method often cannot adjust the posture of the bed to the right position at one time, so the patient cannot be placed in the best lithotomy position, which affects the operation of the operation.
[0003] The existing patent discloses a real-time adjustable lithotomy position treatment bed (patent application number: 202122147553.8). The plan records that "a screw adjustment mechanism and a worm lifting mechanism are used to cooperate, and the distance between the two leg rests is adjusted by the screw adjustment mechanism, and then the leg rest is adjusted to an appropriate height by the worm adjustment mechanism. The leg rest can be adjusted in real time according to surgical needs without removing the patient's legs from the leg rest device, so that the patient can be placed in an appropriate lithotomy position. This solves the problem that the leg rest device on the existing treatment bed is difficult to adjust into place at one time, affecting the operation of the operation, and the patient's legs need to be removed from the leg rest device multiple times and then the leg rest device needs to be adjusted. " However, some deficiencies were found in actual use. First, both the lead screw adjustment mechanism and the screw adjustment mechanism are manually adjusted. When the patient's lower limbs are placed on the leg support, they have a certain weight and pressure, which causes the screw teeth of the lead screw, screw and other mechanisms to fit tightly together, generating a large friction force, which will bring a certain resistance to the adjustment. Therefore, the structure of the lead screw and screw is relatively laborious to adjust by manpower; secondly, the device can only be adjusted horizontally and vertically, but the patient's legs are at a certain angle when opened. Therefore, when the leg support is opened vertically, the patient's legs are opened at an angle, and the legs are The angle of the leg support does not change when it is opened longitudinally, that is, the leg support will form a certain obstruction to the patient's legs, affecting the patient's comfort; finally, the leg support disclosed in the patent is basically the same as the leg frame structure in the prior art. However, during the operation, there is still a problem, that is, the leg frame is stuck in the popliteal fossa, and the gravity support point of the entire lower limb is borne by the popliteal fossa. When the operation is long, it is easy to cause lower limb venous thrombosis and common peroneal nerve damage due to poor blood circulation. It can be seen from the technical solution disclosed in the patent that the patent cannot currently reduce lower limb venous thrombosis and common peroneal nerve damage to a certain extent. Utility Model Content
[0004] The technical problem to be solved by the present application is to provide a lithotomy position frame, which can semi-automatically adjust the posture of the frame to adapt to the patient's body shape and the height, angle, etc. required for the operation; the degree of human involvement in the adjustment is small, and the adjustment is driven by a controller to drive the cylinder, which is convenient and accurate; the body frame can perform knee flexion and extension movements, which can reduce the patient's lower limb venous thrombosis and common peroneal nerve damage to a certain extent.
[0005] In order to solve the above technical problems, this application adopts the following technical solutions:
[0006] A lithotomy position frame comprises a bed body, a fixed seat is arranged under the bed body, frame components are arranged on the left and right sides of the bed body respectively, the frame components comprise a swing mechanism for adjusting the patient's thigh hip flexion angle and a flexion-extension mechanism for adjusting the patient's knee flexion-extension angle, an angle adjustment mechanism for adjusting the patient's lower limb opening angle is arranged between the swing mechanism and the flexion-extension mechanism; the swing mechanism comprises a first connecting arm that swings along the side of the bed body and a first telescopic arm that drives the first connecting arm to swing, the flexion-extension mechanism comprises a second connecting arm and a third connecting arm that are movably connected, a lower limb support is arranged on the flexion-extension mechanism, and the sides of the second connecting arm and the third connecting arm are provided with a telescopic mechanism for controlling the third connecting arm to swing.
[0007] In some embodiments, the angle adjustment mechanism includes a bite plate, a fixed disk, a pressing rod and a spring. The bite plate consists of two pieces, which are equidistantly arranged on the front end surface of the first connecting arm and are angled with the first connecting arm. The fixed disk is arranged between the two bite plates, and the fixed disk is connected to the rear end of the second connecting arm and is angled with the second connecting arm. A coaxial through hole is provided in the middle of the bite plate and the fixed disk, and a pressing rod is provided in the coaxial through hole. The top and bottom surfaces of the pressing rod are respectively provided with flanges for limiting the falling out of the pressing rod, and a limit pin for adjusting the rotation of the fixed disk is provided on the flange on the bottom surface of the pressing rod. Correspondingly, a through hole for the limit pin to pass through is provided on the bite plate below the fixed disk, and a circle of fixing holes for the limit pin to pass through is provided on the circumference of the fixed disk. A spring is sleeved on the pressing rod, and the spring is provided between the bite plate above the fixed disk and the flange on the top surface of the pressing rod.
[0008] In some embodiments, the telescopic mechanism includes a second telescopic arm and a guide rod, the side wall of the second connecting arm is provided with a bracket, one end of the second telescopic arm is movably connected to the bracket, the end of the telescopic rod of the second telescopic arm is spherical, the guide rod is provided on the side of the third connecting arm, and the end face of the guide rod facing the second telescopic arm is provided with an end guide groove for placing the second telescopic arm, and the end of the telescopic rod of the second telescopic arm is placed in the guide groove.
[0009] In some embodiments, the first telescopic arm and the second telescopic arm are hydraulic cylinders.
[0010] Compared with the prior art, the present application achieves at least the following beneficial effects: the present structure adopts an electric control method to control the frame assembly to adjust the patient's body position, the first telescopic arm is used to adjust the swing angle of the first connecting arm, that is, to adjust the angle formed by the patient's thigh and upper limb, the second telescopic arm is used to adjust the hinge angle of the second connecting arm and the third connecting arm, that is, to adjust the angle of the patient's knee flexion and extension, and the operation of the first telescopic arm and the second telescopic arm is controlled by electric control. The adjustment torque is large, and the patient can lie on the lithotomy position frame first for adjustment, and the patient's body position can be adjusted into place in a short time, saving the physical strength and energy of medical staff and facilitating the operation; an angle adjustment mechanism is provided between the swing mechanism and the flexion and extension mechanism. When the patient's lower limbs are opened, the angle adjustment mechanism is pressed. The pressing rod is pressed, and then the flexion and extension mechanism is swung to a suitable angle. The flexion and extension mechanism can be locked by releasing the pressing rod and resetting through the spring. The angle is easy to adjust, so that the lower limb support can adapt to the angle of the patient's lower limb opening, thereby improving the patient's comfort. The frame assembly of the present structure can be laid flat by the control of the first telescopic arm and the second telescopic arm. When the patient undergoes surgery, if the blood circulation and skin temperature of the lower limbs are abnormal, the frame assembly can be temporarily laid flat to allow the patient's lower limbs to recover properly and then the frame assembly can be controlled to be reset for surgery. After the patient completes the surgery, it is inconvenient to move the lower limbs due to anesthesia, and the flexion and extension mechanism can slowly flex and extend, thereby driving the patient's lower limbs to move and accelerating blood circulation. Therefore, the present structure has a certain effect in preventing lower limb venous thrombosis and common peroneal nerve injury. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] One or more embodiments of the present application will now be described, by way of example only, with reference to the accompanying drawings, in which:
[0012] Figure 1 It is a three-dimensional schematic diagram of a frame assembly of a lithotomy position frame according to an embodiment of the present application in a propped-up state;
[0013] Figure 2 for Figure 1 A side view of the lithotomy position frame of the embodiment;
[0014] Figure 3 for Figure 1 A top view of the lithotomy position frame of the embodiment;
[0015] Figure 4 It is a three-dimensional schematic diagram of a frame assembly of a lithotomy position frame according to an embodiment of the present application in a flat state;
[0016] Figure 5 for Figure 3 A side view of the lithotomy position frame of the embodiment;
[0017] Figure 6An exploded view of the angle adjustment mechanism of the lithotomy position frame according to an embodiment of the present application;
[0018] Figure 7 This is a schematic diagram of the flexion and extension work of the flexion and extension mechanism of the lithotomy position frame according to an embodiment of the present application.
[0019] The numbers in the figure are: 1. bed body; 2. remote control; 3. swing mechanism; 31. first telescopic arm; 32. first connecting arm; 4. fixed seat; 41. fixing ear; 5. angle adjustment mechanism; 51. pressing rod; 511. flange; 512. limit pin; 52. spring; 53. bite plate; 531. bite plate through hole; 532. pin hole; 54. fixing plate; 541. fixing plate through hole; 542. adjustment hole; 6. flexion and extension mechanism; 61. second connecting arm; 611. sling; 62. thigh support; 63. third connecting arm; 64. calf support; 65. second telescopic arm; 66. guide rod; 661. guide groove; 67. fixing bolt; 7. cushion. DETAILED DESCRIPTION
[0020] The present application will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided here to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.
[0021] In the description of the present application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.
[0022] The inventors have made a careful analysis and found that the above-mentioned problems of the existing lithotomy position beds are mainly caused by the fact that the screw adjustment mechanism combined with the screw adjustment mechanism used in the existing technology are both manually adjusted. When the patient's lower limbs are placed on the leg rest, they have a certain weight and pressure, which causes the screw teeth of the screw and screw mechanisms to fit tightly together, resulting in high friction. When adjusting a large distance, it will bring certain resistance to the adjustment. For example, the patent document mentioned in the background technology records that the gear is driven by a bolt, and the gear drives the screw, and finally the screw drives the lifting sleeve to achieve the height adjustment. In actual operation, the more meshing points, the more laborious the adjustment, and the greater the error. Therefore, the structure of the screw and screw is relatively laborious to adjust by manpower. Secondly, the device in the patent document can only be adjusted horizontally. The leg rest can be adjusted in the longitudinal and longitudinal directions, but the patient's legs are opened at a certain angle. Therefore, when the leg rest is opened longitudinally, the patient's legs are opened at an angle, and the angle of the leg rest itself does not change when it is opened longitudinally, that is, the leg rest and the patient's lower limbs form a certain angle, and the leg rest at this angle will hit the patient's legs, and the leg rest will form a certain obstruction to the patient's legs, affecting the patient's comfort; finally, the leg rest disclosed in this patent is basically consistent with the leg frame structure of the prior art. There is also a common problem in the existing lithotomy position bed, that is, the leg rest is short, and the leg rest is stuck in the popliteal fossa of the patient's lower limb. Therefore, the gravity support point of the entire lower limb is borne by the popliteal fossa. When the operation is long, the pressure point is easy to cause slow blood return to the lower limbs, causing lower limb venous thrombosis and common peroneal nerve damage. Based on the above analysis, the inventor has improved the structure for adjusting the posture of the patient's lower limbs.
[0023] like Figure 1-3 As shown, in one embodiment of the lithotomy position frame of the present application, the frame includes a bed 1 for a patient to lie on his back, a fixing seat 4 for fixing the bed 1 is provided under the bed 1, a control cabinet (not shown) is provided between the bed 1 and the fixing seat 4, a controller is provided in the control cabinet, a remote control 2 extends from the controller and is hung on the side of the bed 1, the control cabinet, the controller and the remote control 2 are existing structures and are not described in detail here.
[0024] The left and right sides of the bed body 1 are respectively provided with frame assemblies, and the frame assemblies include a swing mechanism 3 for adjusting the patient's thigh hip flexion angle and a flexion and extension mechanism 6 for adjusting the patient's knee flexion and extension angle. An angle adjustment mechanism 5 for adjusting the opening angle of the patient's lower limbs is provided between the swing mechanism 3 and the flexion and extension mechanism 6; the swing mechanism 3 includes a first connecting arm 32 that swings along the side of the bed body 1 and a first telescopic arm 31 that drives the first connecting arm 32 to swing (refer to Figure 2 and Figure 5), the flexion-extension mechanism 6 includes a second connecting arm 61 and a third connecting arm 63 which are movably connected. The flexion-extension mechanism 6 is provided with a lower limb support for supporting the patient's thigh and calf. The sides of the second connecting arm 61 and the third connecting arm 63 are provided with a telescopic mechanism for controlling the swinging of the third connecting arm 63.
[0025] refer to Figure 2 and Figure 5 A round through hole is provided in the middle front part of the first connecting arm 32, and the side of the middle front part of the bed body 1 is hingedly connected through a rotating shaft. The rear end of the first connecting arm 32 is hingedly connected to the telescopic rod of the first telescopic arm 31, and the other end of the first telescopic arm 31 is hingedly connected to the fixed seat 4. Specifically, a pair of sheet-shaped fixing ears 41 are welded on the top surface of the fixed seat 4 corresponding to the position of the first telescopic arm 31, and a rotating shaft is fixedly provided between the two fixing ears 41. A through hole is provided at the bottom end of the first telescopic arm 31, and the first telescopic arm 31 is sleeved on the rotating shaft between the fixing ears 41 through its own through hole, such as Figure 2 As shown, when the telescopic rod of the first telescopic arm 31 contracts obliquely downward, the telescopic rod of the first telescopic arm 31 is restricted by the first connecting arm 32 and swings clockwise. The contraction of the telescopic rod of the first telescopic arm 31 drives the first connecting arm 32 to swing counterclockwise, and the flexion and extension mechanism 6 at the other end of the first connecting arm 32 is raised to a certain height, thereby lifting the patient's thigh and forming a certain angle between the thigh and the upper limb.
[0026] refer to Figure 5 and Figure 6 The angle adjustment mechanism 5 includes a bite piece 53, a fixed plate 54, a pressing rod 51 and a spring 52. The bite piece 53 is two pieces, and its structure is circular. The thickness can be selectively set. The two bite pieces 53 are welded to the front end of the first connecting arm 32 at equal distances from top to bottom, and form an angle of 90° or greater than 90° with the first connecting arm 32; the fixed plate 54 body is circular, the thickness can be selectively set, and is arranged between the two bite pieces 53. The side surface of the fixed plate 54 is welded to the rear end of the second connecting arm 61, and forms an angle of 90° or greater than 90° with the second connecting arm 61, as shown in FIG. Figure 5As shown, when the first connecting arm 32 and the second connecting arm 61 are connected by the angle adjustment mechanism 5, the first connecting arm 32 and the second connecting arm 61 are arranged in parallel; a coaxial through hole is opened in the middle of the bite plate 53 and the fixed plate 54. For the convenience of distinction, the through hole on the bite plate 53 is marked as the bite plate through hole 531, and the through hole on the fixed plate 54 is marked as the fixed plate through hole 541. A pressing rod 51 is arranged in the coaxial through hole, and the top and bottom surfaces of the pressing rod 51 are respectively welded with flanges 511 for limiting the falling out of the pressing rod 51, and the flange 511 on the bottom surface of the pressing rod 51 is welded with A limit pin 512 is used to adjust the rotation of the fixed disk 54. Accordingly, a pin hole 532 for the limit pin 512 to pass through is provided on the engaging piece 53 below the fixed disk 54, that is, the flange 511 at the bottom of the pressing rod 51 is placed at the bottom of the engaging piece 53 below the fixed disk 54, and the limit pin 512 on the flange 511 is placed in the pin hole 532. A circle of adjustment holes 542 for the limit pin 512 to pass through is provided on the circumference of the fixed disk 54. A spring 52 is sleeved on the pressing rod 51, and the spring 52 is provided between the engaging piece 53 above the fixed disk 54 and the flange 511 on the top surface of the pressing rod 51.
[0027] When the angle adjustment mechanism 5 is used, the pressing rod 51 is pressed, and the limiting pin 512 on the flange 511 on the bottom surface of the pressing rod 51 moves downward and moves out of the adjustment hole 542 coaxial with the pin hole 532. At this time, the flexion and extension mechanism 6 can be rotated, and the adjustment hole 542 on the fixing plate 54 rotates accordingly. When the flexion and extension mechanism 6 rotates to match the angle of opening of the patient's lower limbs and the pin hole 532 and the adjustment hole 542 are coaxial, the pressing rod 51 is released, and the spring 52 on the pressing rod 51 is restored to its original position without pressure, and the flange 511 on the top surface of the pressing rod 51 is lifted upward, and then the pressing rod 51 and the limiting pin 512 are driven to move upward. After the limiting pin 512 is extended into the adjustment hole 542 coaxial with the pin hole 532, the rotation of the flexion and extension mechanism 6 is limited. The effect is as follows: Figure 3 shown.
[0028] As mentioned above, the function of the flexion and extension mechanism 6 is to adjust and fix the flexion and extension state of the patient's lower leg before the operation, and to actively guide the patient's lower leg to flex and extend the knee after the operation to accelerate blood circulation. Therefore, in order to achieve the above-mentioned movement trajectory, the second connecting arm 61 and the third connecting arm 63 are hingedly connected, such as Figure 2 , 6 and Figure 7 As shown, from a side view, when the second connecting arm 61 swings counterclockwise, the third connecting arm 63 hinged to the second connecting arm 61 swings clockwise, forming a knee flexion action; when the second connecting arm 61 swings clockwise, the third connecting arm 63 hinged to the second connecting arm 61 swings counterclockwise, forming a knee extension action.
[0029] The flexion and extension mechanism 6 needs the support of the telescopic mechanism to realize the flexion and extension of the knee. Figure 6 and Figure 7 As shown, the telescopic mechanism includes a second telescopic arm 65 and a guide rod 66. The side wall of the second connecting arm 61 is provided with a bracket 611 with a screw hole. One end of the second telescopic arm 65 is provided with a through hole, and is hingedly connected to the bracket 611 through the hole. Specifically, a shaft sleeve protruding from the through hole surface is provided in the through hole of the second telescopic arm 65, and a bolt is provided in the shaft sleeve, and the bolt is screwed into the bracket 611. The end of the telescopic rod of the second telescopic arm 65 is spherical, and the guide rod 66 is fixed to the side of the third connecting arm 63 by screws. The guide rod 66 is a square tube, and an end guide groove 661 for placing the second telescopic arm 65 is provided on the end surface facing the second telescopic arm 65. The end of the telescopic rod of the second telescopic arm 65 is placed in the guide groove 661. The telescopic rod of the second telescopic arm 65 can move in the guide groove 661, but is constrained by the spherical end and cannot escape from the guide groove 661. The screws are fixed to the two ends of the guide rod 66 respectively, which can prevent the telescopic rod of the second telescopic arm 65 from coming out of the two ends of the guide rod 66. Figure 7 When the second telescopic arm 65 extends, it pushes the guide rod 66 to drive the third connecting arm 63 to swing counterclockwise (as shown by the dotted line); the second telescopic arm 65 contracts, pulling the guide rod 66 to drive the third connecting arm 63 to swing clockwise (as shown by the solid line), thereby realizing the movement trajectory of flexion and extension of the knee.
[0030] The lower limb support made of plastic material includes a thigh support 62 and a calf support 64. The second connecting arm 61 is fixed with a U-shaped thigh support 62 by a fixing bolt 67, and the third connecting arm 63 is fixed with a calf support 64 of a shape matching the patient's calf by a fixing bolt 67. The lower limb support is provided with a cushion 7 made of a memory pillow material. The purpose of arranging the cushion 7 is to increase the wrapping surface of the lower limb (increase the force-bearing area) and reduce the pressure on the lower limb. A heating wire is arranged in the cushion 7. Lithotomy position surgery such as bladder lithotripsy will use a large amount of isotonic water to flush the bladder, which will lead to the occurrence of hypothermia during the operation. The heating wire is arranged to heat the cushion 7, and the heat is transferred to the patient's lower limbs through the cushion 7, so as to better maintain the patient's body temperature and reduce the occurrence of postoperative complications.
[0031] The first telescopic arm 31 and the second telescopic arm 65 of the present embodiment are both provided with a telescopic rod, and the specific structure thereof is a hydraulic cylinder of an existing product.
[0032] The main frame is electrically driven by a controller. The medical staff holds the remote control 2 and sends a signal to the controller. The controller gives a command to drive the first telescopic arm 31 and the second telescopic arm 65 to extend, and adjust the frame assembly to Figure 4 and Figure 5 Then the patient lies on his back on the bed 1, places his lower limbs on the lower limb support, and then drives the first telescopic arm 31 and the second telescopic arm 65 to retract, and adjusts the frame assembly to Figure 2Then, the angle of the flexion and extension mechanism 6 is adjusted by the angle adjustment mechanism 5 to open the patient's lower limbs to a suitable angle, and the angle adjustment mechanism 5 is locked. The final shape is as follows Figure 1 and 3 The whole adjustment process is basically controlled by the machine, which reduces the intensity of human adjustment.
[0033] It should be understood that all the above embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above based on the concept of the present application should all be within the protection scope of the present application.
Claims
1. A lithotomy position frame, comprising a bed body, a fixing seat being provided below the bed body, characterized in that: The left and right sides of the bed are respectively provided with frame assemblies, and the frame assemblies include a swing mechanism for adjusting the patient's thigh hip flexion angle and a flexion-extension mechanism for adjusting the patient's knee flexion-extension angle, and an angle adjustment mechanism for adjusting the patient's lower limb opening angle is provided between the swing mechanism and the flexion-extension mechanism; the swing mechanism includes a first connecting arm that swings along the side of the bed and a first telescopic arm that drives the first connecting arm to swing, and the flexion-extension mechanism includes a second connecting arm and a third connecting arm that are movably connected, and the sides of the second connecting arm and the third connecting arm are provided with a telescopic mechanism for controlling the third connecting arm to swing; and a lower limb support is provided on the flexion-extension mechanism.
2. The body positioning frame according to claim 1, characterized in that: The front middle part of the first connecting arm is hingedly connected to the side of the bed body, the rear end of the first connecting arm is hingedly connected to the telescopic rod of the first telescopic arm, and the other end of the first telescopic arm is hingedly connected to the fixing seat.
3. The body positioning frame according to claim 1, characterized in that: The angle adjustment mechanism includes a bite plate, a fixed disk, a pressing rod and a spring, the bite plate consisting of two plates, which are equidistantly arranged on the front end surface of the first connecting arm and are angularly distributed with the first connecting arm, the fixed disk is arranged between the two bite plates, the fixed disk is connected to the rear end of the second connecting arm, and is angularly distributed with the second connecting arm; a coaxial through hole is provided in the middle of the bite plate and the fixed disk, a pressing rod is provided in the coaxial through hole, the top and bottom surfaces of the pressing rod are respectively provided with flanges for limiting the falling out of the pressing rod, a limit pin for adjusting the rotation of the fixed disk is provided on the flange on the bottom surface of the pressing rod, correspondingly, a pin hole for the limit pin to pass through is provided on the bite plate below the fixed disk, and a circle of adjustment holes for the limit pin to pass through is provided on the circumference of the fixed disk; a spring is sleeved on the pressing rod, and the spring is provided between the bite plate above the fixed disk and the flange on the top surface of the pressing rod.
4. The body positioning frame according to claim 1, characterized in that: The second connecting arm and the third connecting arm are hingedly connected.
5. The body positioning frame according to claim 1, characterized in that: The telescopic mechanism includes a second telescopic arm and a guide rod. The side wall of the second connecting arm is provided with a bracket. One end of the second telescopic arm is movably connected to the bracket. The end of the telescopic rod of the second telescopic arm is spherical. The guide rod is arranged on the side of the third connecting arm. The end surface of the guide rod facing the second telescopic arm is provided with an end guide groove for placing the second telescopic arm, and the end of the telescopic rod of the second telescopic arm is placed in the guide groove.
6. The body positioning frame according to claim 5, characterized in that: The first telescopic arm and the second telescopic arm are hydraulic cylinders.
7. The body positioning frame according to claim 1, characterized in that: The lower limb support comprises a thigh support and a calf support, the second connecting arm is provided with a thigh support, and the third connecting arm is provided with a calf support.
8. The body positioning frame according to claim 7, characterized in that: A soft pad is arranged on the lower limb support.