Wheelchair device for personnel transfer

Abstract

The invention relates to the technical field of wheelchair devices, and discloses a wheelchair device for personnel transfer, the wheelchair device comprises two front wheel struts and a wheelchair main frame, the two front wheel struts are symmetrically arranged on the front side of the wheelchair main frame, each front wheel strut is provided with a wheelchair front wheel and a pedal support, and each front wheel strut comprises a strut body, the supporting column body is fixedly connected with the wheelchair main frame. The first block body is fixedly connected with the supporting column body; impact is absorbed through sliding of the sliding blocks and deformation of the springs, the damping effect is obvious, and secondary injury to the wounded part when a person with injured legs and feet is transferred is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchair devices, and in particular to a wheelchair device for personnel transfer. Background Art

[0002] As the global aging trend intensifies, the number of elderly people continues to increase. Many of these elderly people have difficulty in moving due to aging and need to use assistive devices such as wheelchairs to carry out daily activities. In home care, family members need to use wheelchairs to take care of their relatives with limited mobility, reduce the burden of care, and improve care efficiency. Wheelchairs used for personnel transfer are playing an increasingly important role in responding to an aging society, meeting the needs of people with disabilities, supporting medical rehabilitation, assisting home care, promoting the construction of a barrier-free social environment, and technological innovation.

[0003] The wheelchair in the prior art (Announcement No.: CN109419591B) is designed to pivotally position between the positioning unit and the pivot unit, so that the pedal mechanism can swing at a large angle relative to the foot rod, making it safer and more convenient for the user to leave the wheelchair. However, the foot rod and the chair frame in the device are rigidly connected. Therefore, when transferring people who need special care for their legs and feet, the vibration of the wheelchair will cause the foot pedal unit to cause discomfort to the injured area. However, when the foot pedal is directly connected with an elastic bracket, there will be a contradiction of continuous shaking, and in severe cases, even secondary injuries may occur. Therefore, it is urgent to design a wheelchair device for personnel transfer with a foot pedal that has both shock absorption and rigidity. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantage of the prior art that wheelchair devices may cause secondary injuries to people with leg injuries when transferring people, and to propose a wheelchair device for transferring people.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A wheelchair device for transferring people includes two front wheel struts and a wheelchair main frame. The two front wheel struts are symmetrically arranged on the front side of the wheelchair main frame. Each of the front wheel struts is equipped with a wheelchair front wheel and a footrest bracket. The front wheel struts include: A support body, wherein the support body is fixedly connected to the main frame of the wheelchair; a first block, the first block being fixedly connected to the support body; a second slider, the second slider being connected to the first block in a first elastic manner, the first elastic manner being set such that when a tensile force exerted by the first block on the second slider is greater than a settable first critical value, the second slider and the first block slide in opposite directions, and when the tensile force exerted by the first block on the second slider is not greater than the settable first critical value, the second slider and the first block remain relatively stationary; The first slider is fixedly connected to the pedal bracket, and the first slider is connected to the second slider in a second elastic manner. The second elastic manner is set so that when the squeezing force of the second slider on the first slider is greater than a settable second critical value, the first slider and the second slider slide in relative directions; when the squeezing force of the second slider on the first slider is not greater than the settable second critical value, the first slider and the second slider are relatively stationary.

[0006] Preferably, the first slider is connected to the second slider via a first spring, and the second slider is connected to the first block via a second spring.

[0007] Preferably, the first slider and the second slider are connected by a flexible rope. When the rope is tightened, the first spring is in a compressed state. A push rod is provided between the second slider and the first block. One end of the push rod is fixedly connected to the second slider, and the second spring is in a stretched state when the other end is against the first block.

[0008] Preferably, a first protrusion is fixedly installed on the surface of the first slider, the first slider is provided with a second cavity, a cover plate is fixedly installed in the opening of the second cavity, a wire roller for winding the rope is provided in the second cavity, and the wire roller can be driven to rotate in the second cavity to tighten the rope.

[0009] Preferably, the first block is provided with a first groove, a second groove is provided in the first groove, a first through hole is provided in the second groove that passes through the outer surface of the first block, a top block is provided in the second groove, and the top block can be driven to slide in the up and down directions in the second groove and resist against the top rod, and a plurality of third grooves are evenly distributed on the surface of the first block in a circumferential manner.

[0010] Preferably, a first cavity and a third cavity that are interconnected are provided in the pillar body, and an adjustment mechanism is provided on the surface of the first block, and the adjustment mechanism adjusts the values ​​of the first critical value and the second critical value simultaneously according to usage requirements.

[0011] Preferably, the adjustment mechanism includes: a first control component disposed in the first groove, the first control component being used to control the position of the top block in the second groove, thereby changing the first critical value; a second control assembly disposed in the third cavity, the second control assembly being used to control the rotation of the wire roller, thereby changing the second critical value by changing the length of the released rope and keeping the rope in a taut state; A driving component; the driving component is arranged on the surface of the first block, and the driving component is used to simultaneously drive the first control component and the second control component to adjust the first critical value and the second critical value.

[0012] Preferably, the first control component includes: A first gear and a second gear, wherein the first gear and the second gear are both rotatably mounted in the first groove, and the first gear is meshed with the second gear; The first screw rod is fixedly installed with the rotation center of the second gear, passes through the outer surface of the top block and is threadedly connected with it, and can drive the top block to change its position in the second groove through the thread.

[0013] Preferably, the second control component includes: a third gear, the third gear being rotatably mounted on the outer surface of the first slider and connected to the rotation center of the line roller via a coupling; a third slider, the third slider being mounted on the surface of the first protrusion in an up-and-down sliding manner, a rack being fixedly mounted on the surface of the third slider, the rack being meshed with the third gear; The second screw rod is rotatably mounted on the surface of the first protrusion, passes through the outer surface of the third slider and is threadedly connected thereto, and a third through hole is provided inside the second screw rod and passes through both ends thereof.

[0014] Preferably, the drive assembly includes: A second shaft body, wherein a third through hole is formed inside the second shaft body and passes through both ends thereof, and a plurality of third shaft bodies are evenly arranged around the circumference of the lower end of the second shaft body, and the rotation of the second shaft body can be restricted by respectively inserting the plurality of third shaft bodies into the plurality of third grooves; The first shaft is rotatably mounted on the surface of the first block, and a plurality of first convex strips are provided on the surface of the first shaft. The lower end of the first shaft is connected to the rotation center of the first gear through a coupling, and the other end passes through the third through hole opened by the second shaft and the second screw rod. The second shaft and the second screw rod slide up and down along the surface of the first shaft body. When the second shaft body rotates, the second screw rod and the first gear are driven to rotate at the same time through the first shaft body.

[0015] When the wheelchair's front wheels travel over bumpy roads, if the compression / tension exceeds a set critical value, the footrest absorbs the impact through the sliding of the slider and the deformation of the spring (e.g., the first spring cushions compression, and the second spring cushions tension), significantly reducing the vibration transmitted to the patient's legs and feet, thus preventing secondary injury. When the road surface is smooth or the force does not exceed the critical value, the slider locks, and the footrest forms a rigid connection with the front wheel support, keeping the patient's legs and feet stable. This is particularly suitable for patients with hip joint injuries, avoiding pain aggravated by continuous shaking. By setting up an adjustment mechanism and adopting a linkage design, the two critical values ​​are increased and decreased simultaneously (e.g., increasing the value increases rigidity, and decreasing the value increases shock absorption sensitivity), preventing parameter mismatches that may lead to functional failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a wheelchair device for personnel transfer proposed by the present invention; Figure 2 This is a schematic structural diagram of a shock absorbing mechanism of a wheelchair device for personnel transfer proposed by the present invention; Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A; Figure 4 This is a schematic diagram of the disassembled structure of the shock absorbing mechanism and the first control assembly of a wheelchair device for personnel transfer proposed by the present invention; Figure 5 This is a schematic cross-sectional structural diagram of a first block of a wheelchair device for personnel transfer proposed by the present invention; Figure 6 This is a schematic structural diagram of a second axis and identification block of a wheelchair device for personnel transfer proposed by the present invention; Figure 7 This is a schematic diagram of the structure of a drive assembly of a wheelchair device for personnel transfer proposed by the present invention; Figure 8 This is a schematic structural diagram of a second control component of a wheelchair device for personnel transfer proposed by the present invention; Figure 9 This is a schematic cross-sectional structural diagram of a first slider of a wheelchair device for personnel transfer proposed by the present invention.

[0017] In the figure: 100, main frame of wheelchair; 200, front wheel support; 210, support body; 2101, first cavity; 2102, first chute hole; 2103, third cavity; 220, first block; 221, first groove; 222, second groove; 223, first through hole; 224, third groove; 225, scale line; 230, bottom plate; 240, first slider; 2401, cover plate; 2402, second cavity; 2403, second through hole; 2404, first protrusion; 2405, second protrusion; 250, second slider; 260, top block; 300, footrest bracket; 310, foot pedal; 320, connecting rod; 400, adjustment mechanism; 410, first control assembly; 411, first gear; 412, second gear; 413, first screw; 420, drive assembly; 421, first shaft; 422, second shaft; 423, third through hole; 424, first ridge; 425, third shaft; 430, second control assembly; 431, third gear; 432, rack; 433, second screw; 434, third slider; 440, identification block; 500, first spring; 600, rope; 700, second spring; 800, push rod; 801, fourth groove; 900, line roller; 910, roller. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0019] like Figure 2 As shown, a wheelchair device for transferring people includes: two front wheel pillars 200 and a wheelchair main frame 100, the wheelchair main frame 100 is used for patients to sit on during transfer, the two front wheel pillars 200 are symmetrically arranged on the front side of the wheelchair main frame 100, each front wheel pillar 200 is equipped with a wheelchair front wheel and a footrest bracket 300, the footrest bracket 300 is used to support the patient's legs and feet, and the footrest bracket 300 has a certain degree of elasticity. More specifically, when the front wheel of the wheelchair passes over an uneven road surface, the squeezing force of the front wheel pillar 200 on the footrest bracket 300 is greater than a certain value, or the front wheel pillar 200 on the footrest bracket 300 is greater than a certain value, 00 is greater than a certain value, the footrest bracket 300 and the front wheel pillar 200 slide relative to each other or in opposite directions, so that the footrest bracket 300 has a certain shock-absorbing effect, thereby preventing the patient's legs and feet from being subjected to violent impact; on the contrary, when the squeezing force of the front wheel pillar 200 on the footrest bracket 300 is not greater than a certain value, or when the footrest bracket 300 is subjected to a pulling force from the front wheel pillar 200 is not greater than a certain value, the footrest bracket 300 and the front wheel pillar 200 are relatively stationary, and the footrest bracket 300 and the legs and feet of the transferred person remain stable, thereby preventing the patient's legs and feet from shaking all the time and causing discomfort to the injured area.

[0020] To achieve the above effects, in one embodiment, Figure 2 As shown, the front wheel strut 200 includes a strut body 210 , a first block 220 , a second slider 250 and a first slider 240 .

[0021] The support body 210 is rigidly connected to the wheelchair main frame 100, and is also rigidly connected to the first block 220. The support body 210 is fixedly connected to the wheelchair main frame 100 by welding, bolts, etc., and the first block 220 is fixedly connected to the support body 210 in a detachable manner by bolts.

[0022] The first slider 240 and the second slider 250 are connected in a second elastic manner. The second elastic manner is set so that when the squeezing force of the second slider 250 on the first slider 240 is greater than a settable second critical value, the first slider 240 and the second slider 250 slide in relative directions, that is, the footrest bracket 300 has a shock-absorbing effect. When the squeezing force of the second slider 250 on the first slider 240 is not greater than the settable second critical value, the first slider 240 and the second slider 250 are relatively stationary (that is, the footrest bracket 300 and the front wheel support 200 are in a rigid connection state).

[0023] like Figure 2 As shown, the second slider 250 is connected to the first block 220 in a first elastic manner. The first elastic manner is set so that when the tensile force of the first block 220 on the second slider 250 is greater than a settable first critical value, the second slider 250 and the first block 220 slide in opposite directions. At this time, the second slider 250 and the first slider 240 are in a rigid connection state, so the first slider 240 has a shock-absorbing effect. When the tensile force of the first block 220 on the second slider 250 is not greater than the settable first critical value, the second slider 250 and the first block 220 are relatively stationary (at this time, the footrest bracket 300 and the front wheel support 200 are also in a rigid connection state).

[0024] More specifically, Figure 2 and Figure 3 As shown, the first slider 240 and the second slider 250 are connected by a first spring 500, and the first slider 240 and the second slider 250 are further connected by a flexible rope 600. When the rope 600 is tightened, the first spring 500 is in a compressed state. The compression force of the first spring 500 at this time is set to F, and the factor of gravity is ignored. When the squeezing force of the second slider 250 on the first slider 240 is greater than F, the second slider 250 and the first slider 240 approach each other, which is a shock absorption mode. When the squeezing force of the second slider 250 on the first slider 240 is not greater than F, the second slider 250 and the first slider 240 are relatively stationary, which is a rigid mode. At this time, F is the second critical value. The second critical value is adjusted by adjusting the compression force F of the first spring 500. The specific adjustment method is to set the second critical value by changing the length of the rope 600, the parameters of the first spring 500, and the friction coefficient between the first slider 240 and the second slider 250.

[0025] More specifically, Figure 2 and Figure 4As shown, the second slider 250 is connected to the first block 220 via a second spring 700, and a push rod 800 is provided between the second slider 250 and the first block 220. One end of the push rod 800 is fixedly connected to the second slider 250, and the other end of the push rod 800 is in tension when it contacts the first block 220. The tension force of the second spring 700 is set to N at this time, and the factor of gravity is ignored. When the pulling force of the first block 220 on the second slider 250 is greater than N, the second slider 250 and the first block 220 are in tension. As the distance between the two blocks increases, the second slider 250 has a shock-absorbing effect. When the pulling force of the first block 220 on the second slider 250 is not greater than N, the second slider 250 and the first block 220 are relatively stationary, which is a rigid mode. At this time, N is the first critical value. The first critical value is adjusted by adjusting the tensile force N of the second spring 700. A more specific adjustment method is to set the first critical value by changing the length of the top rod 800, the parameters of the second spring 700, and the friction coefficient between the first block 220 and the second slider 250.

[0026] In this embodiment, as the squeezing (or stretching) force of the wheelchair pillar 200 on the footrest bracket 300 changes, the footrest bracket 300 can automatically switch between shock absorption and rigidity modes, thereby resolving the contradiction in traditional wheelchairs where the rigid connection of the footrest bracket 300 cannot provide shock absorption, or the continuous shaking of the elastic bracket affects specific injuries.

[0027] The footrest bracket 300 includes a footrest 310 and a connecting rod 320. In the prior art, most footrest brackets 300 are rigidly connected to the front wheel support 200. In the present invention, one end of the connecting rod 320 is coupled to the footrest 310, and the other end is connected to the first slider 240. Figure 2 and Figure 4 As shown, the first slider 240 is provided with a second protrusion 2405 fixedly connected to the connecting rod 320, and the surface of the pillar body 210 is provided with a first slide hole 2102 connected to the first cavity 2101, and the second protrusion 2405 is slidably installed in the first slide hole 2102. A base plate 230 is fixedly installed at the bottom of the first block 220, and the base plate 230 is used to install the front wheelchair wheel.

[0028] In a specific embodiment, Figure 9As shown, a first protrusion 2404 is fixedly installed on the surface of the first slider 240, and the first slider 240 is provided with a second cavity 2402. A cover plate 2401 is fixedly installed in the opening of the second cavity 2402, and a line roller 900 for winding the rope 600 is provided in the second cavity 2402. The line roller 900 can be driven to rotate in the second cavity 2402 to tighten the rope 600. More specifically, a second through hole 2403 is provided at the bottom of the second cavity 2402, which passes through the outer surface of the first slider 240. At least one roller 910 is also rotatably installed in the second cavity 2402. One end of the rope 600 passes through the second through hole 2403 and enters the second cavity 2402, and then is wound around the roller 910 and wound on the surface of the line roller 900, so as to avoid wear of the rope 600 due to frequent friction with the second through hole 2403 during the winding and releasing process, thereby improving the service life of the rope 600.

[0029] In a specific embodiment, Figure 4 As shown, the first block 220 is provided with a first groove 221, a second groove 222 is provided in the first groove 221, a first through hole 223 is provided in the second groove 222, and a top block 260 is provided in the second groove 222. The top block 260 can be driven to slide in the up and down directions in the second groove 222, and the top rod 800 passes through the first through hole 223 and abuts against the top block 260. A fourth groove 801 is provided at one end of the top rod 800 close to the top block 260, and a plurality of third grooves 224 are evenly distributed on the surface of the first block 220 in a circumferential manner.

[0030] like Figure 2 As shown, a first cavity 2101 and a third cavity 2103 that are interconnected are opened in the pillar body 210, the first slider 240 and the second slider 250 are both slidably installed in the first cavity 2101, and an adjustment mechanism 400 is provided on the surface of the first block 220. The adjustment mechanism 400 adjusts the values ​​of the first critical value and the second critical value at the same time according to the requirements of use.

[0031] In a specific embodiment, the adjustment mechanism 400 includes: a first control component 410 and a second control component 430. The first control component 410 is disposed in the first groove 221. The first control component 410 is used to control the position of the top block 260 in the second groove 222, thereby changing the pre-tensioning force of the second spring 700 ( Figure 4 / Figure 5 ), thereby changing the first critical value, the second control component 430 is disposed in the third cavity 2103, and the second control component 430 is used to control the rotation of the wire roller 900, and by changing the length of the rope 600 released and keeping the rope 600 in a taut state, the pre-compression force of the first spring 500 is changed ( Figure 3 ) and thus change the second critical value.

[0032] If the person being transferred has a leg or foot injury, the first and second thresholds need to be lowered so that even the slightest bump triggers the shock absorption, minimizing impact on the injured area. If the injury is near the hip joint, the first and second thresholds need to be raised to suppress the shock absorption function, maintain rigidity, and prevent joint shaking. By adjusting the first and second thresholds, the sensitivity of the tensile (compression) shock absorption is controlled, addressing the pain point of the traditional wheelchair footrest design, which is unable to adapt to different injuries.

[0033] More specifically, Figure 4 and Figure 5 As shown, the first control assembly 410 includes: a first gear 411 and a second gear 412, the first gear 411 and the second gear 412 are both rotatably mounted in the first groove 221, the first gear 411 is meshed with the second gear 412, and further includes a first screw rod 413, the first screw rod 413 is fixedly mounted to the rotation center of the second gear 412, the first screw rod 413 passes through the outer surface of the top block 260 and is threadedly connected thereto, and the top block 260 can be driven by the thread to change its position in the second groove 222, as the top block 260 descends so that the first screw rod 413 passes through the top block 260, when the top rod 800 abuts against the top block 260, the first screw rod 413 is inserted into the fourth groove 801; like Figure 8 As shown, the second control component 430 includes: a third gear 431, a third slider 434 and a second screw rod 433. The third gear 431 is rotatably mounted on the outer surface of the first slider 240. The third gear 431 is connected to the rotation center of the line roller 900 through a coupling. The third slider 434 is mounted on the surface of the first protrusion 2404 in an up and down sliding manner. A rack 432 is fixedly mounted on the surface of the third slider 434. The rack 432 is engaged with the third gear 431. The second screw rod 433 is rotatably mounted on the surface of the first protrusion 2404. The second screw rod 433 passes through the outer surface of the third slider 434 and is threadedly connected to it. A third through hole 423 is opened inside the second screw rod 433 and runs through both ends thereof.

[0034] If the first control component 410 and the second control component 430 are driven separately, it is easy to cause the changes in the first critical value and the second critical value to be anti-correlated due to misoperation, so that the footrest bracket 300 cannot achieve the required stability effect. Therefore, the adjustment mechanism 400 in the present invention also includes a drive component 420, and the drive component 420 is arranged on the surface of the first block 220. The drive component 420 is used to simultaneously drive the first control component 410 and the second control component 430 so that the first critical value and the second critical value are synchronously adjusted in a positive correlation.

[0035] By adopting a linkage design, such risks can be completely avoided, ensuring the consistency of mode switching logic, and improving the operational reliability of the device, which is especially suitable for emergency medical scenarios.

[0036] More specifically, Figure 7 As shown, the driving assembly 420 includes: a second shaft 422 and a first shaft 421. The second shaft 422 is provided with a third through hole 423 running through both ends thereof. The lower end of the second shaft 422 is provided with a plurality of third shafts 425 evenly arranged in a circumference. The rotation of the second shaft 422 can be restricted by inserting the plurality of third shafts 425 into the plurality of third grooves 224 respectively. The first shaft 421 is rotatably mounted on the surface of the first block 220. The surface of the first shaft 421 is provided with a plurality of first ridges 424. The lower end of the first shaft 421 is provided with a plurality of first ridges 424. It is connected to the rotation center of the first gear 411 through a coupling, and the other end passes through the third through hole 423 opened by the second shaft 422 and the second screw rod 433. The second shaft 422 and the second screw rod 433 slide up and down along the surface of the first shaft 421. When the second shaft 422 rotates, it can simultaneously drive the second screw rod 433 and the first gear 411 to rotate through the first shaft 421, thereby performing synchronous positive correlation adjustment on the first critical value and the second critical value, thereby improving the accuracy of adjustment of the first critical value and the second critical value.

[0037] In order to facilitate intuitive understanding of the degree of stability of the footrest bracket 300, a plurality of scale lines 225 are provided on the top of the first block 220 and in a semicircle around the second shaft 422. A parameter nameplate can be provided next to the scale lines 225 to display the stability of the footrest bracket 300. An identification block 440 for indicating parameters is fixedly installed on the surface of the second shaft 422.

[0038] Scale mark 225 ( Figure 5 and Figure 6 ) and the identification block 440 directly display the adjustment gear, and the corresponding injury type (such as "hip stabilization mode" / "leg and foot cushioning mode") is clearly indicated in combination with the parameter nameplate.

[0039] When in use, the second shaft 422 is lifted upward along the first shaft 421 until the third shaft 425 is disengaged from the third groove 224, and then the second shaft 422 is rotated. The second shaft 422 drives the first shaft 421 to rotate, and then simultaneously drives the second screw rod 433 and the first gear 411 to rotate, so that the rope 600 is wound and the top block 260 rises synchronously, thereby increasing the first critical value and the second critical value at the same time, and conversely reducing the first critical value and the second critical value at the same time. The mode is switched within ten seconds. By calibrating the scale, medical staff can record the best parameters for different patients, achieve personalized reproduction, greatly reduce the operating threshold, and avoid relying on experience judgment.

[0040] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A wheelchair device for personnel transfer, characterized in that: The invention comprises two front wheel pillars (200) and a wheelchair main frame (100), wherein the two front wheel pillars (200) are symmetrically arranged on the front side of the wheelchair main frame (100), and each front wheel pillar (200) is equipped with a wheelchair front wheel and a pedal support (300). The front wheel pillars (200) include: A support body (210), wherein the support body (210) is fixedly connected to the wheelchair main frame (100); A first block (220), wherein the first block (220) is fixedly connected to the support body (210); a second slider (250), the second slider (250) being connected to the first block (220) in a first elastic manner, the first elastic manner being set such that when the tensile force of the first block (220) on the second slider (250) is greater than a settable first critical value, the second slider (250) and the first block (220) slide in opposite directions, and when the tensile force of the first block (220) on the second slider (250) is not greater than the settable first critical value, the second slider (250) and the first block (220) are relatively stationary; A first slider (240), wherein the first slider (240) is fixedly connected to the pedal bracket (300), and the first slider (240) and the second slider (250) are connected in a second elastic manner, wherein the second elastic manner is set such that when the squeezing force of the second slider (250) on the first slider (240) is greater than a settable second critical value, the first slider (240) and the second slider (250) slide in relative directions, and when the squeezing force of the second slider (250) on the first slider (240) is not greater than the settable second critical value, the first slider (240) and the second slider (250) are relatively stationary.

2. The wheelchair device for personnel transfer according to claim 1, characterized in that: The first slider (240) and the second slider (250) are connected via a first spring (500), and the second slider (250) and the first block (220) are connected via a second spring (700).

3. The wheelchair device for personnel transfer according to claim 2, characterized in that: The first slider (240) and the second slider (250) are also connected by a flexible rope (600). When the rope (600) is tightened, the first spring (500) is in a compressed state. A push rod (800) is provided between the second slider (250) and the first block (220). One end of the push rod (800) is fixedly connected to the second slider (250), and when the other end of the push rod is against the first block (220), the second spring (700) is in a stretched state.

4. The wheelchair device for personnel transfer according to claim 3, characterized in that: A first protrusion (2404) is fixedly mounted on the surface of the first slider (240), the first slider (240) is provided with a second cavity (2402), a cover plate (2401) is fixedly mounted in the opening of the second cavity (2402), a wire roller (900) for winding the rope (600) is provided in the second cavity (2402), and the wire roller (900) can be driven to rotate in the second cavity (2402) to tighten the rope (600).

5. The wheelchair device for personnel transfer according to claim 3, characterized in that: The first block (220) is provided with a first groove (221), a second groove (222) is provided in the first groove (221), a first through hole (223) penetrating the outer surface of the first block (220) is provided in the second groove (222), a top block (260) is provided in the second groove (222), and the top block (260) can be driven to slide in the second groove (222) in an up-and-down direction and abut against the top rod (800), and a plurality of third grooves (224) are uniformly provided on the surface of the first block (220) in a circumferential manner.

6. The wheelchair device for personnel transfer according to claim 1, characterized in that: The support body (210) is provided with a first cavity (2101) and a third cavity (2103) that are interconnected. The surface of the first block (220) is provided with an adjustment mechanism (400). The adjustment mechanism (400) adjusts the values ​​of the first critical value and the second critical value simultaneously according to the needs of use.

7. The wheelchair device for personnel transfer according to claim 5, characterized in that: The regulating mechanism (400) comprises: a first control component (410), the first control component (410) being disposed in the first groove (221), the first control component (410) being used to control the position of the top block (260) in the second groove (222), thereby changing the first critical value; a second control component (430), the second control component (430) being disposed in the third cavity (2103), the second control component (430) being used to control the rotation of the wire roller (900), thereby changing the second critical value by changing the length of the released rope (600) and keeping the rope (600) in a taut state; A driving component (420); the driving component (420) is disposed on the surface of the first block (220), and the driving component (420) is used to simultaneously drive the first control component (410) and the second control component (430) to adjust the first critical value and the second critical value.

8. The wheelchair device for personnel transfer according to claim 7, characterized in that: The first control component (410) includes: a first gear (411) and a second gear (412), wherein the first gear (411) and the second gear (412) are both rotatably mounted in the first groove (221), and the first gear (411) and the second gear (412) are meshed with each other; A first screw rod (413) is fixedly mounted on the rotation center of the second gear (412). The first screw rod (413) passes through the outer surface of the top block (260) and is threadedly connected thereto. The top block (260) can be driven by the thread to change its position in the second groove (222).

9. The wheelchair device for personnel transfer according to claim 7, characterized in that: The second control component (430) includes: a third gear (431), the third gear (431) being rotatably mounted on the outer surface of the first slider (240), and the third gear (431) being connected to the rotation center of the line roller (900) via a coupling; A third slider (434), the third slider (434) is mounted on the surface of the first protrusion (2404) in an up-and-down sliding manner, a rack (432) is fixedly mounted on the surface of the third slider (434), and the rack (432) is meshed with the third gear (431); The second screw rod (433) is rotatably mounted on the surface of the first protrusion (2404), and the second screw rod (433) passes through the outer surface of the third slider (434) and is threadedly connected thereto. The second screw rod (433) is provided with a third through hole (423) extending through both ends thereof.

10. The wheelchair device for personnel transfer according to claim 7, characterized in that: The driving assembly (420) includes: A second shaft (422), wherein the second shaft (422) is provided with a third through hole (423) penetrating both ends thereof, and a plurality of third shafts (425) are evenly arranged on the lower end of the second shaft (422) in a circumferential manner, and the rotation of the second shaft (422) can be restricted by inserting the plurality of third shafts (425) into the plurality of third grooves (224) respectively; A first shaft (421) is rotatably mounted on the surface of the first block (220). A plurality of first convex strips (424) are provided on the surface of the first shaft (421). The lower end of the first shaft (421) is connected to the rotation center of the first gear (411) through a coupling, and the other end passes through a third through hole (423) formed by the second shaft (422) and the second screw rod (433). The second shaft (422) and the second screw rod (433) slide up and down along the surface of the first shaft (421). When the second shaft (422) rotates, the second screw rod (433) and the first gear (411) are simultaneously driven to rotate through the first shaft (421).

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