A cushioning and energy-absorbing medical bed leg based on the mantis shrimp micro-bionic structure

Abstract

The present invention discloses a buffering and energy-absorbing medical bed leg based on the microscopic bionic structure of a mantis shrimp, which relates to the field of medical equipment technology. The leg comprises an outer shell, a sliding inner column, a bionic energy-absorbing structure, and a bottom connecting plate. The sliding inner column is slidably arranged inside the outer shell, the lower end of the sliding inner column is connected to the bionic energy-absorbing structure, the lower end of the bionic energy-absorbing structure is connected to the bottom connecting plate, the lower end of the outer shell is connected to the bed frame of an external bed via the bottom connecting plate, the top of the sliding inner column is connected to the bed board of the external bed, and the bionic energy-absorbing structure includes multiple herringbone structure modules. By providing the bionic energy-absorbing structure, the shock-absorbing and buffering performance of the bed during movement can be significantly improved, the vibration impact caused by uneven road surface or bumpy operation can be reduced, and the risk of secondary injury to critically ill patients during transportation can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a buffering and energy-absorbing medical bed leg based on the microscopic bionic structure of a mantis shrimp. Background Art

[0002] During the transport of critically ill patients, vibration and impact from hospital beds or stretchers can cause secondary injuries, especially for those with fractures, spinal cord injuries, or those undergoing surgery. Currently, common energy-absorbing structures often use traditional shock-absorbing technologies, such as springs. While these technologies can absorb impact energy to a certain extent, their efficiency is limited in high-frequency vibration or complex impact environments.

[0003] Existing medical transport beds typically use rigid legs or springs to achieve energy absorption. However, these shock-absorbing designs have the following drawbacks: First, their simple structure limits their energy absorption and makes them difficult to adapt to complex floor environments; second, the spring structure exhibits a force-displacement characteristic with no apparent plateau during compression.

[0004] Therefore, there is an urgent need for a new type of medical bed leg structure that can meet the strength requirements while having excellent cushioning and energy absorption performance, especially the ability to adapt to impact loads in different usage scenarios, and improve the safety and comfort of the bed during loading and moving.

[0005] Therefore, a buffering and energy-absorbing medical bed leg based on the mantis shrimp micro-bionic structure is proposed to solve the above problems. Summary of the Invention

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a buffering and energy-absorbing medical bed leg based on the mantis shrimp micro-bionic structure, comprising an outer shell, a sliding inner column, a bionic energy-absorbing structure and a bottom connecting plate. The sliding inner column is slidably arranged inside the outer shell, and the lower end of the sliding inner column is connected to the bionic energy-absorbing structure. The lower end of the bionic energy-absorbing structure is connected to the bottom connecting plate. The lower end of the outer shell is connected to the bed frame of the external bed through the bottom connecting plate, and the top of the sliding inner column is connected to the bed board of the external bed. The bionic energy-absorbing structure includes multiple herringbone structure modules, each herringbone structure module includes two relatively arranged V-shaped support units and a honeycomb hexagonal microstructure, the two V-shaped support units together form a diamond structure, and a honeycomb hexagonal microstructure is embedded between the two V-shaped support units. The vertices of the two herringbone structure modules coincide and are perpendicularly staggered together to form a bionic energy-absorbing unit. Multiple bionic energy-absorbing units distributed in a three-dimensional grid array are combined into a bionic energy-absorbing structure.

[0007] Preferably, the bionic energy-absorbing structure is a three-dimensional grid array structure formed by regularly arranging bionic energy-absorbing units in the x-axis direction, y-axis direction and z-axis direction that are perpendicular to each other, wherein the number of bionic energy-absorbing units in the x-axis direction, y-axis direction and z-axis direction of the three-dimensional grid array structure are 5, 5 and 3 respectively.

[0008] Preferably, the shell is a hollow cubic column structure, and the four corners of the lower end of the shell extend inward to form a mounting platform. The mounting platform is provided with four first threaded holes, and the bottom connecting plate is provided with four second threaded holes corresponding to the first threaded holes.

[0009] Preferably, a third threaded hole is provided at the upper end of the sliding inner column.

[0010] Preferably, the bionic energy-absorbing structure is made of TPU material.

[0011] Preferably, the outer shell and the sliding inner column are made of aluminum alloy material.

[0012] The present invention has the following beneficial effects:

[0013] The present invention provides buffering and energy-absorbing medical bed legs based on the mantis shrimp's micro-bionic structure, which exhibits obvious multi-stage collapse behavior under quasi-static compression, can significantly improve the shock-absorbing and cushioning performance of the bed during movement, reduce the vibration impact caused by uneven road conditions or bumpy operations, and effectively reduce the risk of secondary injuries to critically ill patients during transportation. It also has a compact structural design and low manufacturing cost, and has good engineering application value and promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the bed leg structure of the present invention;

[0015] Figure 2 This is a cross-sectional view of the bed leg structure of the present invention;

[0016] Figure 3 Schematic diagram of the housing in the present invention;

[0017] Figure 4 Schematic diagram of the sliding inner column in the present invention;

[0018] Figure 5 This is a schematic diagram of the bottom connecting plate in the present invention;

[0019] Figure 6 Schematic diagram of the integration of the bionic bed legs in the present invention;

[0020] Figure 7 Schematic diagram of a single-layer unit of the bionic energy-absorbing structure of the present invention;

[0021] Figure 8 Schematic diagram of a single layer of the bionic energy-absorbing structure of the present invention;

[0022] Figure 9 This is a schematic diagram of the installation position of the bed legs in the present invention;

[0023] Figure 10 is the displacement-force response curve of the bionic energy-absorbing structure and the spring of the present invention;

[0024] Figure 11 Schematic diagram of the specific energy absorption of the bionic energy absorption structure of the present invention and the spring.

[0025] In the figure: 1, outer shell; 11, mounting platform; 12, first threaded hole; 2, sliding inner column; 21, third threaded hole; 3, bionic energy absorption structure; 31, V-shaped support unit; 32, honeycomb hexagonal microstructure; 4, bottom connecting plate; 41, second threaded hole; α, angle of V-shaped support unit; t1, wall thickness of V-shaped support unit; L, side length of honeycomb hexagonal microstructure; t2, thickness of honeycomb hexagonal microstructure; T, period width; A, height of V-shaped support unit. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0028] Embodiments of the present invention

[0029] like Figures 1 to 9 As shown, a buffering and energy-absorbing medical bed leg based on the microscopic bionic structure of a mantis shrimp comprises an outer shell 1, a sliding inner column 2, a bionic energy-absorbing structure 3 and a bottom connecting plate 4. The sliding inner column 2 is slidingly arranged inside the outer shell 1, and the lower end of the sliding inner column 2 is connected to the bionic energy-absorbing structure 3, and the lower end of the bionic energy-absorbing structure 3 is connected to the bottom connecting plate 4. The lower end of the outer shell 1 is connected to the main structure of the bed at the lower part of the external medical bed through the bottom connecting plate 4. The bottom connecting plate 4 provides a rigid support and mounting interface. The top of the sliding inner column 2 is connected to the bed board part or the connecting plate of the external medical bed. The bionic energy-absorbing structure 3 bears the bed board and patient load. When the bed is subjected to a load, the sliding inner column 2 moves downward with the upper bed board, pushing the bionic energy-absorbing structure 3 to collapse, absorbing impact energy, and reducing secondary injuries to the patient caused by vibration.

[0030] The bionic energy-absorbing structure 3 includes a plurality of herringbone structure modules, each of which includes two V-shaped support units 31 arranged opposite to each other in an upper and lower direction and a honeycomb hexagonal microstructure 32. The two V-shaped support units 31 together form a diamond structure, and a honeycomb hexagonal microstructure 32 is embedded between the two V-shaped support units 31 for filling internal gaps, enhancing lateral support stiffness, improving stability and energy absorption ratio, and realizing multi-stage progressive collapse deformation under vertical loads to provide excellent buffering and energy absorption performance. The vertices of the two herringbone structure modules overlap and are vertically staggered together to form a bionic energy-absorbing unit. A plurality of bionic energy-absorbing units distributed in a three-dimensional grid array are combined into a bionic energy-absorbing structure 3. Under the action of vertical pressure, the bionic energy-absorbing structure 3 can collapse and absorb energy to achieve shock-absorbing and buffering functions.

[0031] like Figure 1 、 Figure 6 and Figure 8 As shown, the bionic energy absorbing structure 3 is a three-dimensional grid array structure formed by regularly arranging bionic energy absorbing units in the x-axis direction, the y-axis direction, and the z-axis direction (i.e., the vertical direction) that are perpendicular to each other. The three-dimensional grid array structure has five bionic energy absorbing units in the x-axis direction, five bionic energy absorbing units in the y-axis direction, and three bionic energy absorbing units in the z-axis direction (a three-layer stacked structure).

[0032] like Figure 1 、 Figure 6 and Figure 7 As shown, the V-shaped support unit 31 has an angle α of 60° and a wall thickness t1 of 3.5 mm. The honeycomb hexagonal microstructure 32 has a periodic hexagonal morphology with a side length L of 7 mm and a thickness t2 of 1 mm. Its height matches that of the V-shaped support unit 31, achieving multi-scale composite energy absorption. Through the synergistic effect of the V-shaped support unit 31 and the honeycomb hexagonal microstructure 32, the bionic energy-absorbing structure 3 collapses layer by layer under vertical loads, absorbing energy and providing excellent cushioning and shock absorption performance.

[0033] like Figure 8 As shown, the bionic energy-absorbing structure 3 utilizes a herringbone-shaped wave crest structure array inspired by the impact zone of the mantis shrimp's claws. Multiple herringbone-shaped structural modules within the same plane are periodically repeated along the X-axis or along the Y-axis, forming a microscopic array structure with excellent energy absorption performance. The geometric outline of multiple herringbone-shaped structural modules located in the same layer and on the same plane can be formally simplified to a triangular wave function:

[0034] ;

[0035] Where A represents the structural height, T represents the period width, x represents the lateral position, and f(x) represents the longitudinal height of the structure at that position. This function can be used to model the profile of the herringbone structural module and guide the adjustable design of structural parameters.

[0036] like Figures 1 to 5 As shown, the shell 1 is a hollow cubic column structure. The shell 1 as a whole is used to accommodate the sliding inner column 2 and the bionic energy absorption structure 3, and provide guiding constraints for the sliding movement. The cross-section of the sliding inner column 2 is smaller than the inner cavity cross-section of the shell 1, so that the sliding inner column 2 can slide in the vertical direction. The four corners of the lower end of the shell 1 extend inward to form a mounting platform 11. Four first threaded holes 12 are provided on the mounting platform 11, and four second threaded holes 41 corresponding to the first threaded holes 12 are provided on the bottom connecting plate 4. The shell 1 and the bottom connecting plate 4 can be connected and fixed to the bed frame of the external bed by screws passing through the bed frame of the external bed, the second threaded holes 41 and the first threaded holes 12 in sequence; the upper end of the sliding inner column 2 is provided with a third threaded hole 21, which is connected to the bed board of the external bed by screws.

[0037] The outer shell 1 and the sliding inner column 2 are made of aluminum alloy material. The height of the outer shell 1 is preferably 430 mm, the cross-sectional size is preferably 120 mm×120 mm, and the thickness of the bottom connecting plate 4 is preferably 4 mm to 8 mm.

[0038] The main manufacturing material of the bionic energy-absorbing structure 3 can be PLA (polylactic acid) or TPU (thermoplastic polyurethane elastomer). The density of PLA material is about 1.25g / cm³, the Young's modulus is about 3 GPa, and the Poisson's ratio is 0.35; the density of TPU material is about 1.2g / cm³, the elastic modulus is about 20MPa, and the Poisson's ratio is 0.4. The specific selection of material can be determined according to the actual shock absorption performance requirements.

[0039] like Figure 1 、 Figure 6 and Figure 10As shown, the bionic energy-absorbing structure 3 of the present invention exhibits significant multi-stage collapse behavior under quasi-static compression, i.e., the structure collapses and deforms step by step and in sections during the stress process, which can improve cushioning stability and prolong the energy absorption process. The bionic energy-absorbing structure 3 is made of TPU material, and the simulated force-displacement curve exhibits "platform-type" cushioning characteristics. The total weight of the patient, bed board, and sliding inner column 2 is assumed to be 1600N, and the force distributed to a single bionic energy-absorbing structure 3 is 400N. The initial peak force of the bionic energy-absorbing structure 3 is 480N, which is lower than the 600N load limit of a single leg of the bed. The bionic energy-absorbing structure 3 can enter the energy absorption zone early, effectively buffering the peak of the transmitted force while avoiding the impact transmission caused by the rigid structure, thereby improving patient safety and structural reliability. During the initial compression stage of 0-480N, the bionic energy-absorbing structure 3, through low-rigidity startup and step-by-step collapse, has excellent flexibility and initial cushioning capacity, effectively filtering micro-vibrations and reducing patient discomfort, surpassing linear rigidity spring structures. During the plateau period, when the loading force increases from 480N to 600N, the bionic energy-absorbing structure 3 maintains a relatively stable load. Deformation dissipates energy primarily through structural collapse. Compared to the rigid response of a spring, which exhibits a continuous linear increase in load during this period, the bionic energy-absorbing structure 3 effectively reduces stress fluctuations caused by sudden vibrations or small impacts. The spring exhibits no noticeable plateau during quasi-static compression, demonstrating its superior structural cushioning stability and higher energy absorption efficiency.

[0040] like Figure 11 As shown in the figure, the SEA (specific energy absorption) of the bionic energy absorption structure reaches 6.2 J / g, which is significantly higher than the 3.3 J / g of the coil spring structure, and has a higher specific energy absorption than the coil spring structure.

[0041] During bed movement, the bionic energy-absorbing structure 3 of the present invention's bed legs, combining a multi-stage herringbone bionic structure with a honeycomb array, provides excellent multi-stage collapse and cushioning capabilities. This adapts to varying impact intensities, from mild vibrations to severe shocks. For patients of varying weights and road conditions, the structure can respond early under low loads, avoiding injuries caused by delayed overload response. This bed leg structure effectively absorbs impact loads caused by uneven surfaces or jerky handling, reducing vibration transmission to the bed deck. This improves patient comfort and safety, making it particularly suitable for transporting critically ill patients.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A cushioning and energy-absorbing medical bed leg based on the mantis shrimp micro-bionic structure, characterized in that: The invention comprises an outer shell (1), a sliding inner column (2), a bionic energy absorbing structure (3) and a bottom connecting plate (4), wherein the sliding inner column (2) is slidably arranged inside the outer shell (1), the lower end of the sliding inner column (2) is connected to the bionic energy absorbing structure (3), the lower end of the bionic energy absorbing structure (3) is connected to the bottom connecting plate (4), the lower end of the outer shell (1) is connected to the bed frame of an external bed through the bottom connecting plate (4), the top of the sliding inner column (2) is connected to the bed board of the external bed, and the bionic energy absorbing structure (3) comprises a plurality of herringbone structure modules, each of which is connected to the bed frame of an external bed. Each of the individual herringbone structure modules includes two relatively arranged V-shaped support units (31) and a honeycomb hexagonal microstructure (32). The two V-shaped support units (31) together form a diamond structure, and a honeycomb hexagonal microstructure (32) is embedded between the two V-shaped support units (31). The vertices of the two herringbone structure modules overlap and are perpendicularly intertwined to form a bionic energy absorption unit. A plurality of bionic energy absorption units distributed in a three-dimensional grid array are combined to form a bionic energy absorption structure (3).

2. The cushioning and energy-absorbing medical bed leg based on the mantis shrimp micro-bionic structure according to claim 1 is characterized in that: The bionic energy absorbing structure (3) is a three-dimensional grid array structure formed by regularly arranging bionic energy absorbing units in the x-axis direction, the y-axis direction and the z-axis direction which are perpendicular to each other. The number of bionic energy absorbing units in the x-axis direction, the y-axis direction and the z-axis direction of the three-dimensional grid array structure are 5, 5 and 3 respectively.

3. The energy-absorbing cushioning medical bed leg based on the mantis shrimp micro-bionic structure according to claim 2, characterized in that: The housing (1) is a hollow cubic column structure. The four corners of the lower end of the housing (1) extend inward to form a mounting platform (11). The mounting platform (11) is provided with four first threaded holes (12). The bottom connecting plate (4) is provided with four second threaded holes (41) corresponding to the first threaded holes (12).

4. The energy-absorbing cushioning medical bed leg based on the mantis shrimp micro-bionic structure according to claim 3, characterized in that: A third threaded hole (21) is provided at the upper end of the sliding inner column (2).

5. The energy-absorbing cushioning medical bed leg based on the mantis shrimp micro-bionic structure according to claim 2, characterized in that: The bionic energy absorbing structure (3) is made of TPU material.

6. The energy-absorbing cushioning medical bed leg based on the mantis shrimp micro-bionic structure according to claim 1, characterized in that: The outer shell (1) and the sliding inner column (2) are made of aluminum alloy material.

Images