A multi-point limited fixing magnetic resonance scanning device

Abstract

The application discloses a multi-point limiting and fixing magnetic resonance scanning device and relates to the technical field of magnetic resonance scanning. The multi-point limiting and fixing magnetic resonance scanning device is characterized in that the device is adapted to the physiological curved surface of the temporal part of the head through a head gravity linkage bilateral centering abutting structure, realizes bilateral synchronous uniform stress, and realizes four-limb full circumferential surface contact constraint through a circumferential embracing type clamping cylinder and an inflatable pad, the inflatable pad can be adapted to the limb contour and is expanded and attached, the traditional linear contact constraint is upgraded to full contact surface uniform constraint, small displacement shaking of a subject is comprehensively inhibited through gapless attachment, safety risks such as poor blood circulation and skin pressure damage caused by local concentrated compression are avoided through uniformly distributed constraint pressure, and the limiting reliability and use comfort are taken into account.

Description

Technical Field

[0001] This invention relates to the field of magnetic resonance scanning technology, specifically to a magnetic resonance scanning device with multi-point limiting and fixing. Background Technology

[0002] Magnetic resonance imaging (MRI) is a medical imaging technology that uses strong magnetic fields and radio frequency pulses to cause hydrogen nuclei in human tissues to resonate and receive the signals they release. These signals are then processed by a computer to generate high-resolution images. By using multiple independent limiting units for areas such as the head, chest, abdomen, and limbs, the voluntary and involuntary displacement of the patient during the scanning process is restricted, thereby suppressing motion artifacts at the source and ensuring imaging accuracy.

[0003] Magnetic resonance imaging (MRI) is a core tool for non-invasive clinical imaging diagnosis. Its imaging quality is highly dependent on the stability of the patient's position during the scanning process. The patient's voluntary or involuntary displacement or shaking can cause motion artifacts in the scanned images. This can reduce imaging accuracy and affect the accuracy of lesion diagnosis, or even lead to scan failure. Especially for children, patients with impaired consciousness, agitation, or involuntary movements, a matching fixation device is needed to reliably limit and restrain the scanned area. This is a core supporting structure to ensure the smooth conduct of MRI examinations. Currently, in clinical practice and in existing publicly available technologies, the positional restraint for MRI scans mostly adopts a strap-type restraint structure. One or more medical straps are used to bind and fix the patient's scanned area to the scanning bed. The strap is a one-piece flexible strap that can only restrain the subject through line contact. It cannot adapt to the irregular physiological curves of the human body. When fixing subjects who are struggling or prone to displacement, there may be a restraint imbalance problem where some points are over-pressured and some points are suspended. This application provides a multi-point limiting and fixing magnetic resonance scanning device, which realizes full-fit multi-point constraint on the irregular curved surface of the human body scanning part, aiming to solve the problems of poor surface adaptability and uneven distribution of constraint pressure in the existing strap-type fixing structure. Summary of the Invention

[0004] The purpose of this invention is to provide a magnetic resonance scanning device with multi-point limiting and fixing, which solves the problems mentioned in the background art.

[0005] To achieve this objective, the present invention adopts the following technical solution: A multi-point limiting and fixing magnetic resonance scanning device includes a base and a magnetic resonance scanning device installed on the top left side of the base. A lifting control device is installed on the top right side of the base. A conveyor frame is provided on the top of the lifting control device. A propulsion device is installed inside the conveyor frame. An examination bed is installed on the top right side of the propulsion device. A fixing component is installed on the top right side of the examination bed for multi-point fixing of the body limbs. A headrest is installed on the top left side of the examination bed through the control component. An abutment pad for limiting and fixing the head is installed on the control component at the front and rear positions of the headrest. A movable base is fixedly installed on the top of the fixed assembly. A fixed circular clamp is fixedly installed on one side of the top of the movable base. A movable circular clamp is hinged to the inner wall of the bottom of the fixed circular clamp. An inflatable pad is installed on the inner wall of both the movable and fixed circular clamps for fixing the limbs of the person being examined after inflation. Pressure sensors are evenly distributed on the inner wall of the inflatable pad to monitor the contact pressure with the patient after inflation. An inflation tube is connected to the outer end of the inflatable pad, and the air inlet of the inflation tube is connected to an external inflation device.

[0006] Furthermore, the fixing component includes a locking mechanism, an opening and closing mechanism, and an adjusting mechanism. The adjusting mechanism includes guide grooves formed on the front and rear parts of the top wall of the examination bed. An isolation pad is fixedly installed on the top of the inner wall of the guide groove to partially seal the guide groove in real time. A guide shaft is fixedly installed on the inner wall of the guide groove. A slide block is slidably installed on the outer wall of the guide shaft. The slide blocks are slidably connected to the inner walls of the corresponding guide grooves.

[0007] Furthermore, an extension seat is fixedly installed on the top wall of the slide seat. The outer wall of the extension seat is slidably connected to the inner wall of the isolation pad. The top of the extension seat is fixedly connected to the bottom of the movable seat. By sliding the slide seat along the guide shaft and the inner wall of the guide groove, the extension seat, the movable seat, the moving circular clamp and the fixed circular clamp can be adjusted and moved, which can be adapted to various limb length positions of patients being examined.

[0008] Furthermore, the locking mechanism includes a steering arm hinged to the outer wall of the movable seat. An operating pressure block is fixedly installed at the top of the steering arm, and a transverse part is installed at the bottom of the steering arm. Several locking keys are uniformly fixedly installed on the bottom wall of the transverse part. The locking keys are trapezoidal in structure. Several locking grooves are linearly opened on the outer wall of the examination bed along the outer edge of the guide shaft. The inner walls of the locking grooves are respectively locked and adapted to the corresponding locking keys. This is used to limit the position of the movable seat, the moving circular clamp, and the fixed circular clamp after the movement adjustment to prevent the movement of the limbs from causing the fixed position to deviate and loosen.

[0009] Furthermore, a mounting base is fixedly installed on the top of the movable seat at the position corresponding to the fixed circular clamp. Several abutment springs are evenly installed between the mounting base and the steering arm. By pressing the operating block, the steering arm is rotated and the abutment springs are compressed, thereby controlling the unlocking of the lateral part and the locking key from the locking groove.

[0010] Furthermore, the opening and closing mechanism includes two lugs fixed to the top of the moving circular clamp and the fixed circular clamp respectively. One lug has a positioning groove in the middle of its outer wall, and the other lug has a positioning block fixedly installed in the middle of its outer wall. The positioning block is embedded in the positioning groove to achieve installation and positioning. A semi-circular buckle is fixedly installed on the top of each lug. A circular groove is opened inside each semi-circular buckle, and a circular limiting member is fixedly installed on the inner wall of each circular groove.

[0011] Furthermore, a circular control seat is rotatably mounted on the inner wall of each circular groove. A limit groove is formed at the outer edge of the circular control seat. A locking ring is fixedly mounted at the outer edge of the circular control seat and at the edge of the limit groove. An outer groove is formed on the outer wall of each semi-circular latch. An operating arm is slidably mounted on the inner wall of each outer groove. The operating arm is fixedly connected to the outer wall of the corresponding locking ring to control the locking ring to rotate in the inner wall of the circular groove, so that the limit groove enters the interior of the circular limit member installed on the other side to complete the closure and fixation of the ear seat, the moving circular clamp and the fixed circular clamp.

[0012] Furthermore, the control component includes a mounting slot on the top left side of the examination bed. A support frame is fixedly mounted on the inner wall of the mounting slot. A sliding block is slidably mounted on the inner wall of the support frame. The top of the sliding block is fixedly connected to the headrest. A plurality of return springs are evenly arranged between the bottom wall of the sliding block and the inner wall of the mounting slot. The bottom end of the return spring is fixedly connected to the inner wall of the mounting slot, and the top end of the return spring is fixedly connected to the bottom of the sliding block.

[0013] Furthermore, side plates are fixedly installed on the front and rear parts of the inner wall of the upright frame, and the outer walls of the side plates are slidably connected to the sliding blocks. The outer walls of the side plates are provided with sliding grooves, and sliding components are slidably installed on the inner walls of the sliding grooves. The sliding components are fixedly connected to the corresponding inner walls of the sliding grooves. Optical shafts are installed at positions between the outer walls of the side plates and the inner walls of the upright frame, and sliding tables are slidably installed on the outer walls of the optical shafts.

[0014] Furthermore, the bottom wall of the slide table and the side wall of the sliding component on the same side are both hinged with connecting rods, and the front and rear parts of the top wall of the upright are provided with through grooves. The inner walls of the through grooves are slidably installed with columns. The top of the column is fixedly connected to the abutment pad, and the bottom of the column is fixedly connected to the outer wall of the slide table.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This multi-point limiting and fixing magnetic resonance scanning device uses a head-gravity-linked, bilaterally centered abutment structure to adaptively conform to the physiological curvature of the temporal region of the head, achieving synchronous and uniform force on both sides. Simultaneously, a circumferentially enveloping clamp combined with an expandable inflatable cushion provides full-circumferential contact constraint for the limbs. The inflatable cushion adaptively expands and conforms to the limb contour, upgrading traditional line contact constraint to uniform constraint across the entire contact surface. This seamless fit comprehensively suppresses minute displacements and swaying of the subject, while the evenly distributed constraint pressure avoids poor blood circulation caused by localized concentrated pressure. It eliminates safety risks such as skin pressure damage, while ensuring both reliable positioning and user comfort. The axial position of the moving seat can be freely adjusted according to the length of the examinee's limbs and body position, making it suitable for examinees of different heights and limb sizes. The head-linked pre-fixation structure, through the adaptive buffering characteristics of the return spring, can adapt to examinees with different head shapes and weights. The adaptive expansion characteristics of the air cushion can adapt to the curved surfaces of limbs with different thicknesses and contours. It can also achieve stable fit and fixation for special examinees with surface deformities, injuries, etc., covering most clinical examination scenarios and examinee groups.

[0016] 2. This multi-point limiting and fixing magnetic resonance scanning device uses a gravity-driven adaptive pre-fixation structure for head fixation, requiring no manual operation or additional power input. Bilateral centering and limiting are automatically completed solely by the subject's head weight. Limb fixation employs a lever-type one-button unlocking and locking structure and a circumferential rotation locking one-button closing structure. The extremely simple operation of pressing to unlock, sliding to adjust, releasing the lock, closing the pre-position, and rotating to lock allows for stepless adjustment of the fixation position and closure and locking of the clamps, significantly shortening the single placement time, effectively increasing the scanning throughput of the magnetic resonance equipment, and eliminating the high dependence on operator experience in traditional fixation methods.

[0017] 3. This multi-point limiting and fixing magnetic resonance scanning device can restrict head displacement through the linkage between the double-sided abutment pads and the headrest. The circumferentially encircling rigid cavity formed by the closing of the fixed circular clamp and the moving circular clamp can simultaneously restrict the axial translation, radial translation, and full degree of freedom of rotation of the limbs. At the same time, the locking structure adopts a toothed meshing reverse self-locking design to avoid locking failure and position slippage. It can effectively restrain the body position of children, subjects with impaired consciousness, and restless subjects who are prone to displacement, completely eliminate body position shaking during the scanning process, eliminate motion artifacts, and ensure the clarity and diagnostic accuracy of high field strength magnetic resonance imaging.

[0018] 4. This multi-point limiting and fixing magnetic resonance scanning device can monitor the contact pressure between the inflatable pad and the subject's body surface in real time through the miniature non-magnetic pressure sensor built into the inflatable pad, and feed the pressure signal back to the external controller to realize closed-loop control of the inflation pressure, so as to accurately control the restraint pressure within the preset safety threshold, thus avoiding compression damage caused by excessive restraint and limiting failure caused by excessive restraint.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] Figure 1 This is a schematic diagram of the external structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the external structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the combination of the lifting control device, the propulsion device, the conveyor frame, and the inspection bed of the present invention; Figure 4 This is a schematic diagram of the upper structure of the examination bed of the present invention; Figure 5 This is an exploded view of the internal structure of the inspection bed and adjustment mechanism of the present invention; Figure 6 This is a schematic diagram of the locking mechanism, fixed circular clamp, movable circular clamp, and inflatable cushion assembly of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the locking mechanism, fixed circular clamp, movable circular clamp, and inflatable cushion assembly of the present invention. Figure 2 ; Figure 8 The internal structure of the fixed circular clamp and the moving circular clamp of this invention explodes. Figure 1 ; Figure 9 The internal structure of the fixed circular clamp and the moving circular clamp of this invention explodes. Figure 2 ; Figure 10 This is a diagram showing the combination of the circular clamp, the movable circular clamp, the movable seat, and the inflatable cushion of the present invention. Figure 11This is a schematic diagram of the external structure of the locking mechanism of the present invention; Figure 12 This is a schematic diagram of the external structure of the opening and closing mechanism of the present invention; Figure 13 This is an exploded view of the internal structure of the opening and closing mechanism of the present invention in the closed state; Figure 14 This is an exploded view of the internal structure of the opening and closing mechanism of the present invention in the open state; Figure 15 This is a schematic diagram showing the separation of the internal structure of the support frame and the mounting groove of the present invention; Figure 16 The internal structure of the control component of this invention exploded. Figure 1 ; Figure 17 The internal structure of the control component of this invention exploded. Figure 2 .

[0023] Illustrations: 1. Magnetic Resonance Imaging Scanner; 2. Base; 3. Lifting Control Device; 4. Propulsion Device; 5. Conveyor Frame; 6. Abutment Pad; 7. Headrest; 8. Fixing Component; 81. Locking Mechanism; 811. Mounting Base; 812. Abutment Spring; 813. Operating Block; 814. Steering Arm; 815. Locking Key; 816. Locking Groove; 817. Lateral Section; 82. Opening and Closing Mechanism; 821. Ear Seat; 822. Positioning Block; 823. Positioning Groove; 824. Semicircular Lock; 825. Outer Edge Groove; 826. Circular Groove; 827. Operating Arm; 828. Circular Limiting Component; 829. Lock 8210. Stop ring; 8211. Limiting groove; 8211. Circular control seat; 83. Adjustment mechanism; 831. Guide groove; 832. Isolation pad; 833. Guide shaft; 834. Slide seat; 835. Extension seat; 9. Control component; 91. Mounting groove; 92. Stand; 93. Through groove; 94. Sliding block; 95. Return spring; 96. Side plate; 97. Sliding groove; 98. Optical axis; 99. Slide table; 910. Connecting rod; 911. Column; 912. Sliding component; 10. Moving seat; 11. Fixed circular clamp; 12. Moving circular clamp; 13. Inflatable cushion; 14. Inspection bed; 15. Inflatable pipe. Detailed Implementation

[0024] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0025] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Please see Figures 1-17 This invention provides a multi-point limiting and fixing magnetic resonance scanning device, including a base 2 and a magnetic resonance scanning device 1 installed on the top left side of the base 2. A lifting control device 3 is installed on the top right side of the base 2. A conveyor frame 5 is provided on the top of the lifting control device 3. A pushing device 4 is installed inside the conveyor frame 5. An examination bed 14 is installed on the top of the pushing device 4. A fixing component 8 is installed on the top right side of the examination bed 14 for multi-point fixing of the body limbs. A headrest 7 is installed on the top left side of the examination bed 14 through a control component 9. An abutment pad 6 for limiting and fixing the head is installed on the control component 9 at the front and rear positions of the headrest 7. A movable base 10 is fixedly installed on the top of the fixed component 8. A fixed circular clamp 11 is fixedly installed on one side of the top of the movable base 10. A movable circular clamp 12 is hinged to the inner wall of the bottom of the fixed circular clamp 11. An inflatable pad 13 is installed on the inner wall of both the movable circular clamp 12 and the fixed circular clamp 11. It is used to fix the limbs of the examinee after inflation. Pressure sensors are evenly distributed on the inner wall of the inflatable pad 13 to monitor the contact pressure with the patient after inflation. An inflation tube 15 is connected to the outer end of the inflatable pad 13. The air inlet end of the inflation tube 15 is connected to an external inflation device.

[0028] In this embodiment, the inflatable cushion 13 is made of medical-grade non-magnetic flexible silicone material. The whole structure is an arc-shaped sac structure that fits the inner wall of the fixed circular clamp 11 and the moving circular clamp 12. After inflation, it can expand evenly in the radial direction towards the center of the inner cavity of the clamp, which fits the irregular physiological curvature of the examinee's limbs and upgrades the traditional strap-type line contact constraint to a 360° full circumferential surface contact constraint. Meanwhile, the pressure sensor installed on the inner wall of the inflatable pad 13 is a non-magnetic miniature piezoresistive sensor (not shown in the figure), which can collect the contact pressure data between the inflatable pad 13 and the subject's body surface in real time, and transmit the data synchronously to the external controller to realize closed-loop precise control of the inflation pressure. This avoids local pressure damage caused by excessive restraint and prevents limit failure caused by excessive restraint, ensuring the safety and reliability of the fixation.

[0029] Specifically, the fixing component 8 includes a locking mechanism 81, an opening and closing mechanism 82, and an adjusting mechanism 83. The adjusting mechanism 83 includes a guide groove 831 opened at the front and rear of the top wall of the examination bed 14. An isolation pad 832 is fixedly installed on the top of the inner wall of the guide groove 831 to partially close the guide groove 831 in real time. A guide shaft 833 is fixedly installed on the inner wall of the guide groove 831. A slide seat 834 is slidably installed on the outer wall of the guide shaft 833. The slide seat 834 is slidably connected to the inner wall of the corresponding guide groove 831.

[0030] In this embodiment, the guide groove 831 is opened parallel to the axis of the examination bed 14, providing a complete linear stroke for the position adjustment of the movable seat 10, and adapting to the limb length adjustment needs of examinees of different heights. The guide shaft 833 and the slide 834 are fitted with a clearance sliding fit, which can accurately guide the movement path of the slide 834 throughout the entire stroke, avoid the slide 834 from wobble or jamming during the sliding process, and ensure the smoothness and accuracy of the position adjustment. Meanwhile, the isolation pad 832 is made of wear-resistant, non-magnetic, flexible rubber material, which can provide semi-enclosed protection for the inside of the guide groove 831 without affecting the sliding of the extension seat 835.

[0031] Specifically, an extension seat 835 is fixedly installed on the top wall of the slide seat 834. The outer wall of the extension seat 835 is slidably connected to the inner wall of the isolation pad 832. The top of the extension seat 835 is fixedly connected to the bottom of the movable seat 10. By sliding the slide seat 834 along the inner wall of the guide shaft 833 and the guide groove 831, the extension seat 835, the movable seat 10, the moving circular clamp 12 and the fixed circular clamp 11 can be adjusted and moved, which can be adapted to various limb length positions of patients being examined.

[0032] In this embodiment, the extension seat 835 can transmit the linear movement of the slide seat 834 to the moving seat 10 without deviation, ensuring the levelness and positional accuracy of the moving seat 10 during the adjustment process; at the same time, the two sets of symmetrically arranged slide seats 834 and extension seats 835 can simultaneously bear the load of the moving seat 10 to prevent the moving seat 10 from overturning or tilting when the examinee struggles and shakes, thus ensuring the overall stability of the fixed structure. By sliding the slide block 834 along the guide shaft 833, the gap of the axial position of the moving seat 10 can be precisely adjusted, which solves the problem that the existing strap fixation can only be fixed-point binding and cannot adapt to different limb lengths. It can cover the examination needs of examinees of different heights and body types, such as children and adults.

[0033] Specifically, the locking mechanism 81 includes a steering arm 814 hinged to the outer wall of the movable seat 10. An operating pressure block 813 is fixedly installed at the top of the steering arm 814. A transverse part 817 is installed at the bottom of the steering arm 814. Several locking keys 815 are evenly fixedly installed on the bottom wall of the transverse part 817. The locking keys 815 are trapezoidal in shape. Several locking grooves 816 are linearly opened on the outer wall of the inspection bed 14 along the outer edge of the guide shaft 833. The inner walls of the locking grooves 816 are respectively locked and adapted to the corresponding locking keys 815. This is used to limit the position of the movable seat 10, the moving circular clamp 12 and the fixed circular clamp 11 after the movement adjustment to prevent the movement of the limbs from causing the fixed position to deviate and loosen.

[0034] In this embodiment, the hinge fulcrum of the steering arm 814 and the moving seat 10 is located between the operating pressure block 813 and the transverse part 817 to form a force-saving lever structure. The operator only needs to apply a small pressing force to complete the unlocking operation, which greatly reduces the difficulty of operation. The trapezoidal locking key 815 and the locking groove 816 are matched with toothed meshing. Its inclined guide structure can realize automatic alignment during the locking process, avoiding problems such as tooth jamming and incomplete locking.

[0035] Specifically, a mounting base 811 is fixedly installed on the top of the movable seat 10 and at the position corresponding to the fixed circular clamp 11. Several abutment springs 812 are evenly installed between the mounting base 811 and the steering arm 814. By pressing the operating block 813, the steering arm 814 is rotated and the abutment springs 812 are compressed, thereby controlling the unlocking of the transverse part 817 and the locking key 815 from the locking groove 816.

[0036] In this embodiment, the mounting base 811 provides stable mounting support for the abutment spring 812. The two ends of the abutment spring 812 are fixed to the corresponding positions of the mounting base 811 and the steering arm 814, respectively. It can continuously provide stable preload force to the steering arm 814 in the non-unlocked state, so that the locking key 815 always remains in a tight engagement with the locking groove 816, and avoids accidental unlocking when the device is subjected to vibration or impact. At the same time, the elastic restoring force of the abutting spring 812 can automatically drive the steering arm 814 to rotate in the opposite direction and reset when the operator releases the operating block 813. This will cause the locking key 815 to automatically embed into the corresponding locking groove 816 to complete the locking without additional manual reset operation. This achieves the convenient operation of "press to unlock, release to lock automatically", greatly simplifying the position adjustment process and improving the positioning efficiency.

[0037] Specifically, the opening and closing mechanism 82 includes two ear seats 821 that are respectively fixed to the top of the moving circular clamp 12 and the fixed circular clamp 11. One ear seat 821 has a positioning groove 823 in the middle of its outer wall, and the other ear seat 821 has a positioning block 822 fixedly installed in the middle of its outer wall. The positioning block 822 is embedded in the positioning groove 823 to achieve installation and positioning. A semi-circular buckle 824 is fixedly installed on the top of each ear seat 821. A circular groove 826 is opened inside each semi-circular buckle 824, and a circular limiting member 828 is fixedly installed on the inner wall of each circular groove 826.

[0038] In this embodiment, the two ear seats 821 are integrally formed with the ends of the movable circular clamp 12 and the fixed circular clamp 11, respectively. The positioning block 822 and the positioning groove 823 adopt a concave-convex fitting structure, which can achieve precise pre-positioning when the movable circular clamp 12 and the fixed circular clamp 11 are closed, providing a positioning reference for the subsequent engagement of the locking structure and preventing the problem of incomplete locking. Meanwhile, the two sets of symmetrically arranged semi-circular latches 824 can be spliced ​​together to form a complete circular locking cavity after the clamping cylinder is closed, providing a stable installation space for the rotation locking of the locking ring 829 and ensuring the fitting accuracy and locking reliability of the locking structure.

[0039] Specifically, a circular control seat 8211 is rotatably installed on the inner wall of the circular groove 826. A limit groove 8210 is opened at the outer edge of the circular control seat 8211. A locking ring 829 is fixedly installed at the outer edge of the circular control seat 8211 and at the edge of the corresponding limit groove 8210. An outer edge groove 825 is opened on the outer wall of the semi-circular latch 824. An operating arm 827 is slidably installed on the inner wall of the outer edge groove 825. The operating arm 827 is fixedly connected to the outer wall of the corresponding locking ring 829 to control the locking ring 829 to rotate in the inner wall of the circular groove 826, so that the limit groove 8210 enters the circular limit member 828 installed on the other side to complete the closure and fixation of the ear seat 821, the moving circular clamp 12 and the fixed circular clamp 11.

[0040] In this embodiment, the circular control seat 8211 and the circular groove 826 are rotated together, which can ensure the coaxiality and stability of the locking ring 829 during rotation and avoid jamming or offset. The circumferential sliding stroke of the operating arm 827 along the outer edge groove 825 is perfectly matched with the rotation locking stroke of the locking ring 829. When the operating arm 827 slides to the end locking position of the outer edge groove 825, the locking ring 829 can be completely embedded in the circular groove 826 of the opposite semi-circular buckle 824. At the same time, the limiting groove 8210 and the opposite circular limiting piece 828 engage and fit together to form a circumferential limiting self-locking structure. Only a single step operation of rotating the operating arm 827 is required to complete the closing and locking of the moving circular clamp 12 and the fixed circular clamp 11, realizing a one-button opening and closing operation. This completely solves the cumbersome operation problem of the existing strap fixation that requires manual wrapping and knotting, and greatly shortens the operation time of limb fixation. Meanwhile, the interlocking structure can withstand multiple loads in the radial and circumferential directions, and even if the subject struggles violently, the clamp will not open or the locking will fail, ensuring the stability of the circumferential restraint.

[0041] Specifically, the control component 9 includes a mounting groove 91 located on the top left side of the examination bed 14. A support frame 92 is fixedly mounted on the inner wall of the mounting groove 91. A sliding block 94 is slidably mounted on the inner wall of the support frame 92. The top of the sliding block 94 is fixedly connected to the headrest 7. A plurality of return springs 95 are evenly arranged between the bottom wall of the sliding block 94 and the inner wall of the mounting groove 91. The bottom end of the return spring 95 is fixedly connected to the inner wall of the mounting groove 91, and the top end of the return spring 95 is fixedly connected to the bottom of the sliding block 94.

[0042] In this embodiment, the mounting groove 91 is a sunken enclosed groove structure, which can provide a protective installation space for all transmission components of the control component 9, avoiding the components from being exposed and causing bumps and contamination, while not occupying the top support space of the examination bed 14 to ensure the comfort of the examinee lying down. The upright frame 92 adopts an integrated U-shaped frame structure, which provides stable support and guide reference for the vertical sliding of the sliding block 94, ensuring the verticality of the vertical movement of the sliding block 94. Multiple sets of return springs 95 are evenly arranged in a matrix, which can provide adaptive buffer support through elastic deformation when the examinee's head is placed on the headrest 7, adapting to examinees with different head weights and different head shapes, avoiding the discomfort caused by rigid support, and providing a stable driving force for the upward reset of the sliding block 94. After the examination is completed, it can automatically drive the headrest 7 and the abutment pad 6 to reset. This structure uses the subject's own head weight as the sole driving force, and can achieve subsequent adaptive pre-fixation of the head without any manual operation or additional power input.

[0043] Specifically, side plates 96 are fixedly installed on the front and rear parts of the inner wall of the upright 92. The outer walls of the side plates 96 are slidably connected to the sliding blocks 94. The outer walls of the side plates 96 are provided with sliding grooves 97. Sliding elements 912 are slidably installed on the inner walls of the sliding grooves 97. The sliding elements 912 are fixedly connected to the inner walls of the corresponding sliding grooves 97. Optical axes 98 are installed at the positions between the outer walls of the side plates 96 and the inner walls of the upright 92. Sliding tables 99 are slidably installed on the outer walls of the optical axes 98.

[0044] In this embodiment, the front and rear side plates 96 are symmetrically fixed to both sides of the inner wall of the upright 92, forming a sliding guide cavity with the upright 92. This allows for simultaneous sliding limit of the front and rear sides of the sliding block 94, preventing the sliding block 94 from swaying forward and backward during vertical sliding. The sliding groove 97 is a vertically oriented structure that slides in conjunction with the sliding component 912. It can provide secondary guidance and limit for the vertical movement of the sliding block 94 throughout its entire stroke, further improving the verticality and stability of the movement of the sliding block 94 and avoiding the problem of asynchronous linkage on both sides caused by positional deviation. The optical axis 98 and the slide table 99 are fitted with a sliding hole, which can provide a precise guide reference for the horizontal movement of the slide table 99 and ensure the straightness of the horizontal movement of the slide table 99, providing a transmission basis for the subsequent precise centering movement of the abutment pad 6.

[0045] Specifically, the bottom wall of the slide table 99 and the side wall of the sliding member 912 on the same side are both hinged with connecting rods 910. The front and rear parts of the top wall of the stand 92 are provided with through grooves 93. The inner wall of the through grooves 93 is slidably installed with columns 911. The top of the column 911 is fixedly connected to the abutment pad 6, and the bottom of the column 911 is fixedly connected to the outer wall of the slide table 99.

[0046] In this implementation scheme, the connecting rod 910, the slide table 99, and the sliding component 912 can precisely and synchronously convert the vertical linear movement of the sliding block 94 into the horizontal opposing linear movement of the two sets of slide tables 99, so as to realize the synchronous automatic centering movement of the double-sided abutment pads 6 after the subject's head is placed. The through groove 93 is a structure opened in the horizontal direction and is slidably engaged with the column 911. This can limit the horizontal movement path of the column 911, prevent the column 911 from swaying during movement, and ensure the accuracy of the movement of the abutment pad 6. The abutment pad 6 is made of medical-grade flexible silicone material, which can adaptively fit the irregular physiological curves of the left and right temporal parts of the subject's head. Through simultaneous centering and fitting on both sides, it achieves uniform force constraint on the head, which not only comprehensively restricts the multi-degree-of-freedom displacement of the head, but also effectively suppresses head shaking during the scanning process.

[0047] This device addresses the core technical shortcomings of existing strap-type restraint structures, including poor adaptability of line contact restraint, inability to conform to irregular physiological curves of the human body, easy occurrence of restraint imbalance ("overpressure at some points, suspension at others"), cumbersome operation, insufficient reliability of limit positioning, and lack of quantitative basis for pressure control. It employs a collaborative working logic of head gravity-linked adaptive pre-fixation + precise limb position adaptation + circumferential rigid locking + flexible pneumatic full-fit limit positioning. It is fully compatible with the strong magnetic field and non-magnetic environment of MRI, enabling multi-dimensional, blind-angle-free constraint of the subject's head and limbs. This fundamentally suppresses voluntary / involuntary displacement and shaking during the scanning process, eliminating motion artifacts, while simultaneously ensuring safety and ease of operation. The specific working principle of this device is as follows: Head adaptive linkage pre-fixation process: The examinee lies flat on the top support surface of the examination bed 14, and places their head naturally in the top positioning groove of the headrest 7. Under the vertical driving load formed by the weight of the head, the headrest 7 drives its bottom sliding block 94 to slide vertically along the inner side of the double-sided uprights 92. Simultaneously, the return spring 95 at the bottom of the sliding block 94 is compressed to produce elastic deformation. The elastic force of the return spring 95 provides adaptive buffer support for the headrest 7, which can adapt to examinees with different head weights and head shapes, avoids the discomfort caused by rigid support, and provides a reset driving force for subsequent linkage reset. During the vertical descent of the sliding block 94, the sliding member 912 slides vertically linearly along the sliding groove 97. Through the interlocking guide structure of the sliding groove 97 and the sliding member 912, the full-stroke movement path of the sliding block 94 is precisely limited, completely avoiding the problem of horizontal swaying and position deviation during the downward movement of the sliding block 94, and ensuring the synchronicity of the action and transmission accuracy of the double-sided linkage structure. At the same time, the connecting rod 910, which moves down synchronously with the sliding member 912, gradually deflects from the initial slightly tilted state to the vertical state. Through the hinged transmission pairs at both ends of the connecting rod 910, the vertical linear motion of the sliding block 94 is converted into the horizontal linear motion of the slide table 99 along the optical axis 98. Under the guidance and limit of the corresponding optical axis 98, the slide table 99 makes a synchronous and stable horizontal movement in opposite directions. Then, through the column 911 fixed to the top of the slide table 99, it drives the abutment pad 6 to move synchronously to both sides of the subject's head along the corresponding through groove 93 on the frame 92. Finally, the double flexible abutment pads 6 completely fit the irregular physiological curves of the left and right temporal parts of the subject's head, completing the adaptive centering pre-fixation of the head. Unlike existing strap-type fixation devices that require manual wrapping, uneven force distribution, poor fit, and cumbersome operation due to unilateral tightening, this device employs a gravity-driven, dual-sided synchronous linkage limiter. It requires no manual operation or additional power input, achieving dual-sided synchronous adaptive fit and limiter solely through the head's own weight. This not only suppresses motion artifacts caused by head shaking and swaying during scanning through full-curved surface contact constraint, but also achieves uniform distribution of constraint pressure on both sides through the linkage structure. This completely avoids the constraint imbalance problems of unilateral overpressure and localized suspension that easily occur with strap-type fixation. Furthermore, the adaptive buffering characteristic of the 95° return spring allows it to adapt to the head size and weight of different groups, including children, adults, and those with special head shapes, significantly improving the device's adaptability and user comfort. Limb fixation adjustment and locking process After the head is pre-fixed, the axial positions of the movable seat 10, fixed circular clamp 11, and movable circular clamp 12 are adjusted according to the length of the examinee's limbs and the position of the body to adapt to the limb fixation needs of examinees of different heights and body types. When adjusting the position, the operator presses the operating block 813 of the locking mechanism 81, which drives the steering arm 814 to rotate along its hinge point with the moving seat 10. This causes the operating block 813 to compress the abutment spring 812 and move it closer to the mounting seat 811. This, in turn, causes the transverse part 817 at the end of the steering arm 814 to rise synchronously with the locking key 815, disengaging from the locking state of the locking groove 816 on the side of the inspection bed 14 and completing one-key unlocking. In the unlocked state, the operator can slide the movable seat 10 along the axis of the inspection bed 14, driving the fixed circular clamp 11 and the movable circular clamp 12 to move axially synchronously. During the movement, the extension seat 835 at the bottom of the movable seat 10 slides smoothly along the inner wall of the isolation pad 832. At the same time, the slide 834, which is fixed to the extension seat 835, slides linearly along the inner wall of the guide groove 831 and the outer wall of the guide shaft 833. Through the guide structure of the shaft hole of the guide shaft 833 and the slide 834, the movement path of the movable seat 10 is fully limited to avoid swaying or jamming during the movement, and ensure the smoothness and accuracy of the position adjustment. After the movable seat 10, the fixed circular clamp 11 and the movable circular clamp 12 are precisely moved to the target fixed positions corresponding to the limbs of the examinee, the operating pressure block 813 is released. Under the action of the elastic restoring force of the abutment spring 812, the steering arm 814 is pushed in the opposite direction to rotate around the hinge fulcrum, thereby driving the transverse part 817 and the locking key 815 to move down synchronously and embed into the locking groove 816 in the corresponding position to complete the toothed engagement locking limit. Unlike existing strap-type fixation methods that only achieve fixed-point binding, cannot precisely adjust the fixation position according to limb length, and have gaps in stepped adjustment, this process adopts a lever-type one-button unlocking + linear adjustment + toothed reverse self-locking structure design, which can achieve precise adjustment of the fixation position and adapt to the personalized fixation needs of subjects with different heights and body types. At the same time, the toothed meshing structure of the locking key 815 and the locking groove 816 solves the defects of strap-type fixation that are easy to loosen under tension and have insufficient limit reliability. Moreover, the entire process only requires three steps of pressing-sliding-releasing to complete the position adjustment and locking, which greatly simplifies the operation process and improves the placement efficiency.

[0048] The process of the limbs wrapping around and locking together with one key. After the fixed position adjustment is completed, the examinee's four limbs are placed into the receiving cavity of the inflatable pad 13 inside the corresponding fixed circular clamp 11. The movable circular clamp 12 is rotated to close to the fixed circular clamp 11, so that the two cooperate to form a complete circumferential limiting cavity. During the closing process, the ear seat 821 at the end of the movable circular clamp 12 drives the positioning block 822 to simultaneously embed into the positioning groove 823 at the corresponding end of the fixed circular clamp 11. The closing pre-positioning is completed to ensure the coaxiality of the fixed circular clamp 11 and the movable circular clamp 12 after closing, and to avoid radial misalignment, so as to provide a precise positioning reference for subsequent locking. After the pre-positioning is completed, rotate the operating arm 827 of the opening and closing mechanism 82 so that it slides circumferentially along the inner wall of the outer edge groove 825 at the end of the fixed circular clamp 11, thereby driving the circular control seat 8211 and the locking ring 829 fixed to the operating arm 827 to rotate synchronously in the circular groove 826 inside the semi-circular latch 824. During the rotation, the limiting groove 8210 on the locking ring 829 fits against the outer wall of the circular limiting member 828 in the circular groove 826 for guidance, ensuring the stability of the rotation process. When the operating arm 827 rotates to the end locking position of the inner wall of the outer edge groove 825, the locking ring 829 rotates synchronously and embeds into the semi-circular latch 824 and the circular groove 826 at the corresponding end of the moving circular clamp 12, so that the limiting groove 8210 and the corresponding circular limiting member 828 are fully engaged and fitted to complete the circumferential locking and limiting, and finally realize the one-key closing locking of the fixed circular clamp 11 and the moving circular clamp 12, forming a rigid circumferential enclosure constraint on the limbs.

[0049] The device employs a circumferential enveloping structure design with pre-positioned coaxial closing and circumferential rotation locking. The complete circular cavity formed by the closing of the fixed circular clamp 11 and the moving circular clamp 12 achieves full circumferential restraint on the limbs. It can simultaneously restrict the axial translation, radial translation and full degree of freedom of rotation of the limbs, thereby suppressing the body position sway caused by the subject's struggle and physiological tremors.

[0050] Flexible air pressure adaptive bonding and fixing process After the clamp is closed and locked, the external inflation device is connected to the air inlet of the inflation tube 15 to deliver stabilizing gas into the inflation pad 13. Under the limiting support of the rigid clamp, the inflation pad 13 can only expand and extend into the inner side of the cavity, gradually conforming to the irregular physiological curvature of the subject's limbs, achieving flexible limiting of the full contact surface of the limbs. During the inflation process, the micro pressure sensor built into the inflation pad 13 monitors the contact pressure between the inflation pad 13 and the subject's body surface in real time, and feeds the pressure signal back to the external controller in real time. When the contact pressure reaches the preset safety constraint threshold, the external controller automatically controls the inflation device to stop inflation, keeping the pressure inside the inflation pad 13 stable, and finally completing the quantitative, uniform, and full-fit fixation of the subject's limbs. This process adopts a structural design of full-circumference flexible airbag + closed-loop pressure precision control. Through the adaptive expansion of the air cushion 13, it can completely conform to the irregular physiological curvature of the limbs, ankles, forearms, knees and other parts, achieving uniform pressure distribution on the 360° full contact surface. This solves the constraint imbalance problem of "some points being over-pressed and some points being suspended" that is easy to occur in the strap-type line contact constraint. It not only avoids the safety risks of poor blood circulation, skin pressure damage and nerve damage caused by local concentrated pressure, but also comprehensively suppresses small displacement and shaking through gapless full-fit constraint to ensure imaging accuracy. Meanwhile, the pressure sensor allows for the regulation of the restraint pressure, and the safety pressure threshold can be flexibly adjusted for subjects such as children, the elderly, and those with poor skin conditions, greatly improving the clinical applicability and safety of the device.

[0051] Magnetic resonance scanning procedure After the subject's head and limbs are fully secured, the lifting control device 3 controls the vertical lifting of the conveyor frame 5, the propulsion device 4, and the examination bed 14, ensuring that the top surface of the examination bed 14 matches the examination cavity opening of the magnetic resonance scanning device 1. Then, the propulsion device 4 drives the examination bed 14 to move horizontally along the conveyor frame 5, smoothly placing the examination bed 14, along with the subject, into the scanning cavity of the magnetic resonance scanning device 1. The magnetic resonance scanning device 1 is then activated to perform the magnetic resonance examination. During the scanning process, the full-point positioning structure of this device maintains the stability of the subject's position throughout, effectively suppressing voluntary / involuntary displacement and swaying, eliminating motion artifacts, and ensuring image quality. After the examination, the above operations are reversed to quickly unlock all positioning structures and allow the subject to be removed.

[0052] In summary, this device, through its coordinated operation of gravity-linked head pre-fixation, position adaptation, circumferential rigid locking, and flexible pneumatic full-fit limiting, represents a substantial difference from existing strap-type fixation technologies. In terms of constraint form, the traditional line contact constraint of the strap is upgraded to a full surface contact constraint, which completely solves the problems of poor adaptability to irregular curved surfaces and easy overpressure and suspension. In terms of operation mode, the cumbersome operation of traditional manual winding and experience-based tightening has been upgraded to a convenient operation of one-click unlocking / locking and automatic adaptive pre-fixing, which greatly improves the efficiency of placement. In terms of limiting reliability, the traditional strap constraint that is easy to loosen and can only restrict a single degree of freedom has been upgraded to a full degree of freedom limit with rigid locking and flexible fit, which can effectively suppress the displacement and shaking of restless subjects and ensure imaging accuracy. In terms of safety control, the traditional experience-based pressure control has been upgraded to precise pressure regulation, which completely avoids the risk of local pressure injury and takes into account both the reliability of the limit and the safety of use. All motion adjustment and locking limit structures in this device are made of non-magnetic, non-metallic materials, which will not produce magnetization shift, eddy current effect, or magnetic field distortion in a strong magnetic resonance magnetic field, and will not produce metal artifacts. The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-point limiting and fixing magnetic resonance scanning device, comprising a base (2) and a magnetic resonance scanning device (1) mounted on the top left side of the base (2), characterized in that: A lifting control device (3) is installed on the top right side of the base (2). A conveyor frame (5) is set on the top of the lifting control device (3). A propulsion device (4) is installed inside the conveyor frame (5). An examination bed (14) is installed on the top of the propulsion device (4). A fixing component (8) is installed on the top right side of the examination bed (14) for multi-point fixation of the body limbs. A headrest (7) is installed on the top left side of the examination bed (14) through a control component (9). An abutment pad (6) for limiting and fixing the head is installed on the control component (9) at the front and rear positions of the headrest (7). The fixed component (8) is fixedly mounted with a movable seat (10) on the top. A fixed circular clamp (11) is fixedly mounted on one side of the top of the movable seat (10). A movable circular clamp (12) is hinged to the inner wall of the bottom of the fixed circular clamp (11). An inflatable pad (13) is installed on the inner wall of both the movable circular clamp (12) and the fixed circular clamp (11) for fixing the limbs of the examinee after inflation. Pressure sensors are evenly distributed on the inner wall of the inflatable pad (13) to monitor the contact pressure with the patient after inflation. An inflation pipe (15) is connected to the outer end of the inflatable pad (13). The air inlet of the inflation pipe (15) is connected to an external inflation device.

2. The magnetic resonance scanning device with multi-point limiting and fixing according to claim 1, characterized in that: The fixing component (8) includes a locking mechanism (81), an opening and closing mechanism (82), and an adjusting mechanism (83). The adjusting mechanism (83) includes a guide groove (831) opened on the front and rear of the top wall of the examination bed (14). An isolation pad (832) is fixedly installed on the top of the inner wall of the guide groove (831) to partially close the guide groove (831) in real time. A guide shaft (833) is fixedly installed on the inner wall of the guide groove (831). A slide block (834) is slidably installed on the outer wall of the guide shaft (833). The slide block (834) is slidably connected to the inner wall of the corresponding guide groove (831).

3. The magnetic resonance scanning device with multi-point limiting and fixing according to claim 2, characterized in that: An extension seat (835) is fixedly installed on the top wall of the slide (834). The outer wall of the extension seat (835) is slidably connected to the inner wall of the isolation pad (832). The top of the extension seat (835) is fixedly connected to the bottom of the movable seat (10). While the slide (834) slides along the inner wall of the guide shaft (833) and the guide groove (831), the extension seat (835), the movable seat (10), the moving circular clamp (12), and the fixed circular clamp (11) are adjusted to accommodate various limb length positions of patients being examined.

4. A magnetic resonance scanning device with multi-point limiting and fixing according to claim 2, characterized in that: The locking mechanism (81) includes a steering arm (814) hinged to the outer wall of the movable seat (10). An operating pressure block (813) is fixedly installed at the top of the steering arm (814). A transverse part (817) is installed at the bottom of the steering arm (814). Several locking keys (815) are evenly fixedly installed on the bottom wall of the transverse part (817). The locking key (815) is trapezoidal. Several locking grooves (816) are linearly opened on the outer wall of the examination bed (14) along the outer edge of the guide shaft (833). The inner wall of the locking groove (816) is locked and adapted to the corresponding locking key (815) to limit the position of the movable seat (10), the moving circular clamp (12) and the fixed circular clamp (11) after the movement adjustment to prevent the movement of the limbs from causing the fixed position to deviate and loosen.

5. A magnetic resonance scanning device with multi-point limiting and fixing according to claim 1, characterized in that: A mounting base (811) is fixedly installed on the top of the movable seat (10) and at the position corresponding to the fixed circular clamp (11). Several abutment springs (812) are evenly installed between the mounting base (811) and the steering arm (814). By pressing the operating block (813), the steering arm (814) is driven to rotate and the abutment springs (812) are compressed, thereby controlling the unlocking of the transverse part (817) and the locking key (815) from the locking groove (816).

6. The magnetic resonance scanning device with multi-point limiting and fixing according to claim 2, characterized in that: The opening and closing mechanism (82) includes two ear seats (821) fixed to the top of the moving circular clamp (12) and the fixed circular clamp (11), respectively. One of the ear seats (821) has a positioning groove (823) in the middle of its outer wall, and the other ear seat (821) has a positioning block (822) fixedly installed in the middle of its outer wall. The positioning block (822) is embedded in the positioning groove (823) to achieve installation and positioning. The top of each ear seat (821) is fixedly installed with a semi-circular buckle (824). The semi-circular buckle (824) has a circular groove (826) in its interior. The inner wall of the circular groove (826) is fixedly installed with a circular limiting member (828).

7. A magnetic resonance scanning device with multi-point limiting and fixing according to claim 6, characterized in that: A circular control seat (8211) is rotatably installed on the inner wall of each circular groove (826). A limit groove (8210) is opened at the outer edge of the circular control seat (8211). A locking ring (829) is fixedly installed at the outer edge of the circular control seat (8211) and at the edge of the corresponding limit groove (8210). An outer edge groove (825) is opened on the outer wall of each semi-circular buckle (824). An operating arm (827) is slidably installed on the inner wall of each outer edge groove (825). The operating arm (827) is fixedly connected to the outer wall of the corresponding locking ring (829) to control the locking ring (829) to rotate in the inner wall of the circular groove (826), so that the limit groove (8210) enters into the circular limit member (828) installed on the other side to complete the closure and fixation of the ear seat (821), the moving circular clamp (12) and the fixed circular clamp (11).

8. A magnetic resonance scanning device with multi-point limiting and fixing according to claim 1, characterized in that: The control component (9) includes a mounting slot (91) on the top left side of the examination bed (14). A support frame (92) is fixedly installed on the inner wall of the mounting slot (91). A sliding block (94) is slidably installed on the inner wall of the support frame (92). The top of the sliding block (94) is fixedly connected to the headrest (7). A plurality of return springs (95) are evenly arranged between the bottom wall of the sliding block (94) and the inner wall of the mounting slot (91). The bottom end of the return spring (95) is fixedly connected to the inner wall of the mounting slot (91), and the top end of the return spring (95) is fixedly connected to the bottom of the sliding block (94).

9. A magnetic resonance scanning device with multi-point limiting and fixing according to claim 8, characterized in that: Side plates (96) are fixedly installed on the front and rear sides of the inner wall of the upright (92). The outer walls of the side plates (96) are slidably connected to the sliding blocks (94). The outer walls of the side plates (96) are provided with sliding grooves (97). The inner walls of the sliding grooves (97) are slidably installed with sliding parts (912). The sliding parts (912) are fixedly connected to the inner walls of the corresponding sliding grooves (97). Optical shafts (98) are installed between the outer walls of the side plates (96) and the inner walls of the upright (92). The outer walls of the optical shafts (98) are slidably installed with slides (99).

10. A magnetic resonance scanning device with multi-point limiting and fixing according to claim 9, characterized in that: The bottom wall of the slide (99) and the side wall of the sliding member (912) on the same side are both hinged with connecting rods (910). The front and rear parts of the top wall of the stand (92) are provided with through grooves (93). The inner wall of the through grooves (93) is slidably installed with columns (911). The top of the column (911) is fixedly connected to the abutment pad (6), and the bottom of the column (911) is fixedly connected to the outer wall of the slide (99).

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