Medical flatcar with spine maintaining and anti-seismic functions

Abstract

The invention provides a medical flatcar with spine maintaining and anti-seismic functions, and belongs to the technical field of medical instruments, the flatcar absorbs vertical oscillation and horizontal jolt in the transfer process through a multi-stage damping structure (buffer springs, air cushions and buffer pads); pavement pre-judgment and self-adaptive damping adjustment are realized through an intelligent sensing system (a laser ranging sensor / laser obstacle avoidance radar, a triaxial accelerometer and a central controller); an ergonomic protection structure (including a spine fixing system, a protection plate and a back cushion) is matched to guarantee the body position safety of the patient; and the equipment management efficiency is improved through a bottom drawing type storage structure. Transfer jolt is remarkably reduced, the device is particularly suitable for patients with spinal injury, cerebral hemorrhage, organ rupture and the like, head displacement is reduced according to clinical actual measurement, and the discomfort rate of the patients is decreased.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a medical trolley with spinal support and shock absorption functions, suitable for patients with spinal injuries, cerebral hemorrhage, organ rupture, etc., in medical scenarios where these patients have extremely high requirements for transport stability. Background Technology

[0002] Domestic medical stretcher mattresses started with simple foam products and have gradually upgraded to functional ones with the development of emergency medicine. Early products focused on basic support, but with the popularization of the concept of safe spinal transport, special mattresses with both support and cushioning functions have become a clinical necessity. Related products are also constantly developing towards a direction that better conforms to the physiological curve of the human spine and has better cushioning performance.

[0003] A search revealed the following defects in current mainstream medical stretchers: The shock absorption structure is too simple: most existing flatbeds use a single spring structure (such as "a medical flatbed" disclosed in CN219921394U), lacking a multi-stage shock absorption system. Actual measurements show that when crossing a 10cm threshold, the patient's head experiences a vertical displacement of 5-8cm, with a peak acceleration of 1.4g, far exceeding the safe range (international standard ISO 13485 stipulates that the peak acceleration of transport equipment should be ≤0.5g).

[0004] Lack of road perception: Existing flatbeds cannot predict road conditions ahead and cannot take shock absorption measures in advance, resulting in patients experiencing greater impact when sudden bumps occur.

[0005] Insufficient protective function: Most existing flatbed protective structures are fixed, which cannot adapt to patients of different body types and lack special protection for patients with spinal injuries.

[0006] Inconvenient equipment storage: During transportation, medical equipment may be damaged by collisions or be inconvenient to access, affecting the efficiency of emergency treatment.

[0007] Although patent CN219921394U proposes a flatbed cart with a fixed structure, its shock absorption system is only a single spring structure and does not consider the road surface prediction function, which cannot meet the stringent requirements for transporting patients with spinal cord injuries, cerebral hemorrhage, organ rupture, etc.

[0008] Therefore, there is an urgent need for a new type of medical flatbed that integrates multi-level shock absorption, intelligent sensing, and ergonomic protection. Summary of the Invention

[0009] The purpose of this invention is to provide a medical trolley with spinal support and shock absorption functions, solving problems such as poor shock absorption, lack of predictive capability, insufficient protection, and inconvenient equipment storage in existing technologies, and significantly improving the safety of transporting patients with spinal injuries, cerebral hemorrhage, and organ rupture. To achieve the above-mentioned objective, this invention provides the following technical solution: The present invention is as follows: a medical flatbed with spinal support and shock absorption functions, comprising a bed board, wherein a shock absorption component is fixedly installed on the top of the bed board and a positioning component is fixedly installed on the bottom of the bed board; The shock-absorbing component includes a mattress mounted on top of the bed board, with several cushioning springs fixedly installed inside the mattress. A cushioning groove is formed on the top of the mattress, and several air cushions are fixedly installed on top of the cushioning groove. A cushioning pad is fixedly installed on top of each air cushion. Two fixing blocks are fixedly installed on the top of the mattress. A limiting band is provided on one side of each fixing block, and a limiting block is inserted into the side of the limiting band away from the fixing block. A slot is formed on the side of the limiting band near the limiting block. A limiting post is threaded onto the top of each limiting block, and a turntable is fixedly installed around the periphery of the limiting post. The limiting post is used to engage with the slot. Two hydraulic rods are fixedly installed at the bottom of the bed board, and a sliding frame is fixedly installed at the bottom of each hydraulic rod. Several pulleys are fixedly installed at the bottom of the sliding frame. A handle is fixedly installed on one side of the bed board.

[0010] As a preferred embodiment of the present invention, the positioning component includes positioning plates fixedly installed on both sides of the sliding frame, a positioning cylinder fixedly installed on the top of the positioning plate, a positioning post threadedly installed on the top of the positioning cylinder, and a suction cup fixedly installed on the bottom of the positioning post.

[0011] As a preferred technical solution of the present invention, two protective plates are hinged to the top of the bed board, a plurality of ventilation grooves are provided on one side of the protective plate, a plurality of insertion grooves are provided on the top of the bed board, and insertion posts are fixedly installed at the bottom of the protective plates, the insertion posts being used to engage with the insertion grooves.

[0012] As a preferred technical solution of the present invention, the anti-seismic component further includes a laser rangefinder / laser obstacle avoidance radar, a triaxial accelerometer, and a central controller; the laser rangefinder / laser obstacle avoidance radar is used to scan the ground contour 0.5–2m ahead, the triaxial accelerometer is used to monitor the flatcar attitude, and the central controller dynamically adjusts the damping force of the hydraulic rod according to the road surface unevenness.

[0013] The central controller runs an adaptive damping control algorithm, including the following steps: (a) Determine the road surface risk level based on laser rangefinder / laser obstacle avoidance radar data; (b) Dynamically set the damping force foundation ratio according to the risk level; (c) The damping force output is finely adjusted in real time using a PID algorithm to make the peak fluctuation rate of vertical acceleration ≤15%.

[0014] In the adaptive damping control algorithm, the risk level judgment is based on dynamically setting a threshold according to the road surface type, including: (a) When the laser rangefinder / laser obstacle avoidance radar detects a road surface unevenness ≥1.0cm, it is determined to be a 'threshold type road surface', and the basic damping ratio is set to 90%; (b) When the road surface unevenness is 0.3cm–0.9cm, it is judged as a 'convex road surface', and the foundation damping ratio is set to 60%; (c) When the road surface unevenness is ≤0.2cm, it is judged as 'smooth road surface', and the foundation damping ratio is set to 20%; (d) Fine-tune the damping force using a PID algorithm to make the peak vertical acceleration volatility ≤ 15% (calculation formula: volatility = |actual peak - target peak| / target peak × 100%).

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The medical-grade contact layer conforms to the physiological curvature of the human body, avoiding pressure on the skin. The matching trunk fixation system can quickly stabilize the patient's body and prevent spinal misalignment caused by turning over or shifting laterally during transport. 2. The positioning components enable the medical trolley to be stably positioned in various scenarios. The fixing method can be flexibly adjusted according to the ground material. On smooth ground, it can be quickly fixed through an adsorption structure, while on rough ground, it can be positioned through a mechanical anchoring method. No drilling is required to ensure that the trolley does not shift when it is parked, providing stable support for patients getting on and off the trolley and for emergency rescue operations.

[0016] 3. This flatbed trolley absorbs vertical vibrations and horizontal bumps during transport through a multi-stage shock absorption structure (buffer springs + air cushions + buffer pads); it achieves road surface prediction and adaptive damping adjustment through an intelligent sensing system (laser rangefinder / laser obstacle avoidance radar + triaxial accelerometer + central controller); and it ensures patient positioning safety with an ergonomic protective structure (spinal fixation system + protective plate + backrest); the bottom pull-out storage structure improves equipment management efficiency. This invention significantly reduces transport bumps and is particularly suitable for patients with spinal injuries, cerebral hemorrhage, organ rupture, etc. Clinical measurements show a 75% reduction in head displacement and an 89% decrease in patient discomfort. Attached Figure Description

[0017] Figure 1 A schematic diagram of a medical flatbed with spinal support and shock absorption functions provided by the present invention; Figure 2A top-view three-dimensional cross-sectional structural diagram of a medical flatbed with spinal support and shock absorption functions provided by the present invention. Figure 3 A three-dimensional cross-sectional view of a medical flatbed with spinal support and shock absorption functions provided by the present invention. Figure 4 A frontal cross-sectional three-dimensional structural schematic diagram of a medical flatbed with spinal support and shock absorption functions provided by the present invention; Figure 5 A three-dimensional cross-sectional view of a medical flatbed with spinal support and shock absorption functions provided by the present invention. Figure 6 This is the basic circuit schematic diagram of the present invention; The diagram shows: 1. Bed board; 2. Shock-absorbing component; 3. Positioning component; 201. Mattress; 202. Cushioning spring; 203. Cushioning groove; 204. Air cushion; 205. Cushioning pad; 206. Fixing block; 207. Limiting belt; 208. Limiting block; 209. Card slot; 210. Limiting post; 211. Turntable; 212. Hydraulic rod; 213. Sliding frame; 214. Pulley; 215. Handle; 301. Positioning plate; 302. Positioning cylinder; 303. Positioning post; 304. Suction cup; 4. Protective plate; 5. Ventilation groove; 6. Insertion groove; 7. Insertion post; 8. Backrest; 9. Cushioning post; 10. Protective pad; 11. Cushioning ring; 12. Placement box; 13. Divider plate; 14. Guide pad. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0019] Example: Figure 1-5 As shown, this embodiment proposes a medical flatbed with spinal support and shock absorption functions, including a bed board 1, a shock absorption component 2 fixedly installed on the top of the bed board 1, and a positioning component 3 fixedly installed on the bottom of the bed board 1. like Figure 2 and Figure 3As shown, the shock-absorbing component 2 includes a mattress 201 mounted on top of the bed board 1. Several cushioning springs 202 are fixedly installed inside the mattress 201. A cushioning groove 203 is formed on the top of the mattress 201. Several air cushions 204 are fixedly installed on the top of the cushioning groove 203. Cushioning pads 205 are fixedly installed on the top of the air cushions 204. Two fixing blocks 206 are fixedly installed on the top of the mattress 201. A limiting band 207 is provided on one side of the fixing block 206. A [missing information - likely a device or component] is inserted into the side of the limiting band 207 away from the fixing block 206. A limiting block 208 and a limiting band 207 have a slot 209 on one side near the limiting block 208. A limiting post 210 is threaded onto the top of the limiting block 208. A turntable 211 is fixedly installed around the limiting post 210. The limiting post 210 is used to engage with the slot 209. Two hydraulic rods 212 are fixedly installed at the bottom of the bed board 1. A sliding frame 213 is fixedly installed at the bottom of the hydraulic rods 212. Several pulleys 214 are fixedly installed at the bottom of the sliding frame 213. A handle 21 is fixedly installed on one side of the bed board 1. 5. During use, several cushioning springs 202 inside the mattress 201 at the top of the bed board 1 form primary shock absorption, which can absorb the vertical shock when the flatbed is pushed. The air cushion 204 in the top cushioning groove 203 achieves secondary cushioning through gas pressure division. Combined with the medical memory foam material of the surface cushioning pad 205, it conforms to the physiological curvature of the human spine, avoiding hard contact and pressure on the skin, and reducing horizontal bumps and displacement. The fixing blocks 206 on both sides of the mattress 201 and the limiting straps 207 constitute the spinal fixation system: after the patient lies flat, pull the limiting straps... The strap 207 fits against both sides of the torso. By rotating the limiting post 210 through the turntable 211 on the limiting block 208, the limiting post 210 is precisely inserted into the slot 209 of the limiting strap 207 to fix the torso and prevent spinal misalignment caused by turning over or shifting laterally during transport. The hydraulic rod 212 at the bottom of the bed board 1 can adjust the height of the flatbed to match the height of the hospital bed and operating table, reducing changes in the patient's position during transfer. The pulleys 214 at the bottom of the sliding frame 213 have a braking function, and together with the side handle 215, it is convenient for medical staff to accurately control the direction of transport.

[0020] like Figure 4As shown, the positioning component 3 includes a sliding frame 213 with positioning plates 301 fixedly installed on both sides. A positioning cylinder 302 is fixedly installed on the top of the positioning plate 301. A positioning post 303 is threadedly installed on the top of the positioning cylinder 302. A suction cup 304 is fixedly installed on the bottom of the positioning post 303. In use, the positioning plates 301 on both sides of the sliding frame 213 provide an installation base for the fixed structure. The top positioning cylinder 302 cooperates with the threaded positioning post 303 to adjust the positioning depth according to the ground material. The suction cup 304 at the bottom of the positioning post 303 can be quickly fixed on smooth surfaces such as ceramic tiles and epoxy flooring, which is suitable for fixed scenarios such as emergency passages and operating rooms. For rough surfaces, the suction cup 304 can be removed and the positioning post 303 can be directly inserted into the ground gap to form a mechanical anchor, ensuring no displacement when the flatcar stops. It provides stable support for operation when patients get on and off the flatcar or during emergency rescue.

[0021] like Figure 4 As shown, two protective panels 4 are hinged to the top of the bed board 1. Several ventilation slots 5 are provided on one side of each protective panel 4, and several insertion slots 6 are provided on the top of the bed board 1. Insertion posts 7 are fixedly installed at the bottom of each protective panel 4. The insertion posts 7 are used to engage with the insertion slots 6. In use, the two protective panels 4 hinged to the top of the bed board 1 can be flipped up to form a side rail, preventing accidental falls during patient transport. After the insertion posts 7 at the bottom of the protective panels 4 are inserted into the insertion slots 6 of the bed board 1, the angle of the protective panels 4 can be locked to prevent wobbling. The ventilation slots 5 on one side of the protective panels 4 ensure air circulation, solving the problem of localized stuffiness caused by traditional closed railings. During medical operations, the insertion posts 7 can be quickly pulled out to lower the protective panels 4, facilitating patient loading and unloading from the stretcher or for postural care.

[0022] like Figure 5 As shown, a headrest 8 is provided on the top of the mattress 201. Several cushioning columns 9 are fixedly installed inside the headrest 8. When in use, the headrest 8 on the top of the mattress 201 can be adjusted in angle according to the patient's condition. The silicone material of the several cushioning columns 9 evenly distributes the pressure on the head and neck, avoiding excessive forward or lateral flexion of the cervical spine when in a semi-reclining position. Together with the trunk limiting belt 207, it forms spinal support, which is suitable for patients in the recovery period of spinal injury. It can not only meet the positional needs during diagnosis and treatment, but also ensure the balanced force on the spine.

[0023] like Figure 4 and Figure 5 As shown, a protective pad 10 is fixedly installed on one side of the protective plate 4, and two buffer rings 11 are fixedly installed on the periphery of the bed board 1. When in use, the protective pad 10 on the inner side of the protective plate 4 can buffer the patient's body from accidental collision with the protective plate 4, avoiding skin abrasions or subcutaneous bruising. The two buffer rings 11 on the periphery of the bed board 1 are made of rubber and can absorb impact energy if they come into contact with the wall or equipment during the transfer process, protecting the patient and the flatbed structure, and are suitable for transfer scenarios such as narrow corridors and elevators.

[0024] like Figure 5 As shown, two storage boxes 12 are fixedly installed on both sides of the mattress 201. Several partitions 13 are fixedly installed on the top of the storage boxes 12. When in use, the storage boxes 12 on both sides of the mattress 201 are divided into several areas by the partitions 13, which can be used to store emergency medicines, medical equipment and patient personal items in categories. Consumables and patient items can be stored nearby to avoid searching around during transportation, so that medical staff can respond quickly to emergencies.

[0025] like Figure 4 As shown, several drainage pads 14 are fixedly installed on the top of the cushioning pad 205. When in use, the drainage pads 14 on the top of the cushioning pad 205 can guide the patient's sweat and wound exudate to the sides of the mattress 201, avoiding the accumulation of liquid on the body surface and causing pressure sores. At the same time, it prevents liquid from seeping into the interior of the mattress 201 and causing pollution, reduces the difficulty of cleaning and disinfecting the mattress 201, meets the hospital infection control standards, and is suitable for the transportation needs of postoperative patients with tubes or incontinence.

[0026] Working Principle: This invention provides a medical trolley with spinal support and shock absorption functions. The specific usage steps are as follows: Several buffer springs 202 inside the mattress 201 at the top of the bed board 1 form primary shock absorption, absorbing vertical vibrations during trolley movement. The air cushion 204 in the top buffer groove 203 achieves secondary cushioning through gas pressure distribution. Combined with the surface buffer pad 205 made of medical memory foam, it conforms to the physiological curvature of the human spine, avoiding hard contact and pressure on the skin while reducing horizontal shifting. The fixing blocks 206 and limiting straps 207 on both sides of the mattress 201 constitute spinal fixation. System: After the patient is placed in a supine position, the limiting strap 207 is pulled to fit against both sides of the torso. The limiting post 210 is rotated by the turntable 211 on the limiting block 208, so that the limiting post 210 is precisely inserted into the slot 209 of the limiting strap 207, thereby fixing the torso and preventing spinal misalignment caused by turning over or shifting laterally during transport. The hydraulic rod 212 at the bottom of the bed board 1 can adjust the height of the flatbed to match the height of the hospital bed and operating table, reducing changes in the patient's position during transfer. The pulleys 214 at the bottom of the sliding frame 213 have a braking function, and together with the side handle 215, it is convenient for medical staff to accurately control the direction of transport (e.g., Figure 2 and Figure 3 As shown), the positioning plates 301 on both sides of the sliding frame 213 provide an installation base for the fixed structure. The top positioning cylinder 302 cooperates with the threaded positioning post 303, and the positioning depth can be adjusted according to the ground material. The suction cup 304 at the bottom of the positioning post 303 can be quickly fixed to smooth surfaces such as ceramic tiles and epoxy flooring, which is suitable for fixed scenarios such as emergency passages and operating rooms. For rough surfaces, the suction cup 304 can be removed and the positioning post 303 can be directly inserted into the ground gap to form a mechanical anchor, ensuring that there is no displacement when the flatcar stops. It provides stable support for operation when patients get on and off the flatcar or during emergency rescue (such as...). Figure 4 (As shown).

[0027] Multi-level shock absorption structure: The cushioning spring (202) inside the mattress (201) forms the first level of shock absorption, the air cushion (204) in the cushioning groove (203) achieves the second level of cushioning through gas pressure division, and the cushioning pad (205) is made of medical memory foam material, which conforms to the physiological curvature of the human spine.

[0028] refer to Figure 6 Intelligent sensing system: A laser rangefinder / laser obstacle avoidance radar and a three-axis accelerometer are added to the bottom of the bed board 1. The central controller monitors the road conditions in real time and dynamically adjusts the damping force of the hydraulic rod 212.

[0029] Power module: Powered by a 12V rechargeable lithium battery, regulated to 5V and 3.3V via DC-DC converter; Laser rangefinder / laser obstacle avoidance radar: Model TF-Luna, communicates with the central controller via I²C interface; the laser obstacle avoidance radar can scan the surrounding environment and is suitable for complex working environments.

[0030] Triaxial accelerometer: Model MPU6050, transmits attitude data via SPI interface; Central controller: STM32F407VGT6, with built-in PID algorithm, performs road surface recognition and damping control; Electromagnetic proportional valve drive circuit (27): Receives PWM signal and controls the opening of the throttle orifice inside the hydraulic damper; Audible and visual alarm: Triggers an audible and visual alert when a high-risk road surface is detected; Bluetooth module: Optional, used to upload operational data to the hospital information system.

[0031] Adaptive Damping Control: The central controller runs an adaptive damping control algorithm, dynamically sets the damping force base ratio according to the road surface unevenness, and fine-tunes it in real time through a PID algorithm.

[0032] Ergonomic protection: The protective pad (10) on the inner side of the protective plate (4) is made of latex material with a Shore hardness of 40-60A, which buffers the patient's body from accidental collision with the protective plate; the buffer ring (11) on the periphery of the bed board (1) is made of rubber material, which absorbs impact energy.

[0033] The clinical trial was a randomized controlled trial (RCT) that included 120 patients with spinal cord injuries, cerebral hemorrhage, organ rupture, etc. (60 in the experimental group and 60 in the control group), aged 18–65 years, whose injuries met the AO spinal classification criteria (Type A3). Head displacement was measured using an accelerometer (model ADXL355), and the data were analyzed. Head displacement in the experimental group: 1.3 ± 0.3 cm (mean ± standard deviation) Head displacement in the control group: 6.5 ± 0.9 cm The t-test result showed that p < 0.001 (significance level 0.05), proving that the difference was statistically significant.

[0034] Clinical discomfort rate comparison: experimental group 2.1% vs control group 18.7% (χ²=38.7, p<0.001) Example 1: Multi-stage vibration reduction and intelligent sensing system linkage like Figure 1-6 As shown, when the flatbed cart is propelled forward, the laser rangefinder / laser obstacle avoidance radar scans the ground ahead at a frequency of 10Hz. When an 8cm high threshold is detected 1.2m ahead, the central controller immediately initiates a warning procedure: Trigger the audible and visual alarm to remind medical staff to slow down; Send a PWM signal (duty cycle 85%) to the electromagnetic proportional valve drive circuit to put the hydraulic damper into a high-damping state. When the flatcar crosses the threshold, the buffer spring (202) absorbs the impact energy, and the air cushion (204) and the buffer pad (205) work together to buffer the impact. The measured vertical displacement of the head is ≤1.3cm and the peak acceleration is ≤0.45g.

[0035] Example 2: Use of the spinal protection system like Figure 4 As shown, after transferring patients with spinal cord injuries, cerebral hemorrhage, organ rupture, etc., to the bed board (1): The limiting straps (207) on the two fixing blocks (206) are pulled up to fit the two sides of the patient's torso; By rotating the limiting post (210) through the turntable (211) on the limiting block (208), the limiting post (210) is precisely inserted into the slot (209) of the limiting band (207) to achieve torso fixation; The pillow (8) is adjusted in angle according to the curvature of the patient's neck, and the internal cushioning column (9) evenly distributes the pressure on the head and neck; The protective panel (4) is flipped up to form a side railing to prevent patients from accidentally falling off the bed during transport.

[0036] Example 3: Equipment Storage System like Figure 5 As shown, loosen the fixing bolts of the partition plate (13) of the placement box (12), pull out the placement box (12), and place the electrocardiogram monitor, oxygen cylinder, and emergency medicine box separately. After pushing it back, tighten the bolts. The equipment does not shake during transportation.

[0037] index This invention Existing technology Improvement effect Head displacement when crossing a 10cm threshold ≤1.5 cm 5–8 cm ↓75% Vertical acceleration on bumpy roads 0.45 g 1.4 g ↓68% Road surface prediction distance 1.2 m 0 m — Equipment storage time ≤5 s ≥30 s ↑6 times Patient discomfort complaint rate 2.1% 18.7% ↓89% The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A medical trolley with spinal support and shock absorption functions, comprising a bed board (1), characterized in that, An anti-vibration component (2) is fixedly installed on the top of the bed board (1), and a positioning component (3) is fixedly installed on the bottom of the bed board (1); the anti-vibration component (2) includes a mattress (201) set on the top of the bed board (1), a number of cushioning springs (202) are fixedly installed inside the mattress (201), a cushioning groove (203) is opened on the top of the mattress (201), a number of air cushions (204) are fixedly installed on the top of the cushioning groove (203), a cushioning pad (205) is fixedly installed on the top of the air cushions (204), and two fixing blocks (206) are fixedly installed on the top of the mattress (201). A limit band (207) is provided on one side of the fixing block (206), and the limit band (207) A limiting block (208) is inserted and installed on the side away from the fixed block (206). A slot (209) is opened on the side of the limiting band (207) close to the limiting block (208). A limiting post (210) is threaded on the top of the limiting block (208). A turntable (211) is fixedly installed on the periphery of the limiting post (210). The limiting post (210) is used to cooperate with the slot (209) for insertion. Two hydraulic rods (212) are fixedly installed at the bottom of the bed board (1). A sliding frame (213) is fixedly installed at the bottom of the hydraulic rods (212). Several pulleys (214) are fixedly installed at the bottom of the sliding frame (213). A handle (215) is fixedly installed on one side of the bed board (1).

2. The medical trolley with spinal support and shock absorption functions according to claim 1, characterized in that, The positioning component (3) includes a positioning plate (301) fixedly installed on both sides of a sliding frame (213), a positioning cylinder (302) fixedly installed on the top of the positioning plate (301), a positioning column (303) threadedly installed on the top of the positioning cylinder (302), and a suction cup (304) fixedly installed on the bottom of the positioning column (303).

3. A medical stretcher with spinal support and shock absorption functions according to claim 1, characterized in that, Two protective plates (4) are hinged to the top of the bed board (1). Several ventilation grooves (5) are provided on one side of the protective plate (4). Several insertion grooves (6) are provided on the top of the bed board (1). Insertion posts (7) are fixedly installed at the bottom of the protective plate (4). The insertion posts (7) are used to cooperate with the insertion grooves (6) for insertion.

4. A medical trolley with spinal support and shock absorption functions according to claim 1, characterized in that, The mattress (201) is provided with a backrest (8) on top, and a number of cushioning columns (9) are fixedly installed inside the backrest (8). The Shore hardness of the backrest (8) is 40-60A.

5. The medical stretcher according to any one of claims 1-4, characterized in that: The anti-seismic component (2) also includes a laser rangefinder / laser obstacle avoidance radar, a triaxial accelerometer and a central controller; the laser rangefinder / laser obstacle avoidance radar is used to scan the ground contour 0.5–2m ahead, the triaxial accelerometer is used to monitor the flatcar attitude, and the central controller dynamically adjusts the damping force of the hydraulic rod (212) according to the road surface unevenness.

6. The medical flatbed according to claim 5, characterized in that: The central controller runs an adaptive damping control algorithm, including the following steps: (a) Determine the road surface risk level based on laser rangefinder / laser obstacle avoidance radar data; (b) Dynamically set the damping force foundation ratio according to the risk level; (c) The damping force output is finely adjusted in real time using a PID algorithm to make the peak fluctuation rate of vertical acceleration ≤15%.

7. The medical flatbed according to claim 6, characterized in that: In the adaptive damping control algorithm, the risk level judgment is based on dynamically setting a threshold according to the road surface type, including: (a) When the laser rangefinder / laser obstacle avoidance radar detects a road surface unevenness ≥1.0cm, it is determined to be a 'threshold type road surface', and the basic damping ratio is set to 90%; (b) When the road surface unevenness is 0.3cm–0.9cm, it is judged as a 'convex road surface', and the foundation damping ratio is set to 60%; (c) When the road surface unevenness is ≤0.2cm, it is judged as 'smooth road surface', and the foundation damping ratio is set to 20%; (d) Fine-tune the damping force using the PID algorithm to make the peak vertical acceleration volatility ≤ 15% (calculation formula: volatility = |actual peak - target peak| / target peak × 100%).

8. A medical stretcher with spinal support and shock absorption functions according to claim 3, characterized in that, A protective pad (10) is fixedly installed on one side of the protective plate (4), and two buffer rings (11) are fixedly installed on the periphery of the bed board (1).

9. A medical stretcher with spinal support and shock absorption functions according to claim 8, characterized in that, Two placement boxes (12) are fixedly installed on both sides of the mattress (201), and several partition boards (13) are fixedly installed on the top of the placement boxes (12).

10. A medical stretcher with spinal support and shock absorption functions according to claim 9, characterized in that, Several flow guide pads (14) are fixedly installed on the top of the buffer pad (205).

Images