Multi-form conversion wheelchair and stretcher integrated device for ambulance

Abstract

The invention relates to the technical field of first-aid transfer stretchers, in particular to a multi-form conversion wheelchair and stretcher integrated device for an ambulance. The device comprises a bearing frame body assembly and a moving wheel train assembly, the bearing frame body assembly is connected with and provided with a supporting deformation assembly, and the bearing frame body assembly and the moving wheel train assembly are controlled and locked through a locking and fixing assembly. The supporting deformation assembly controls the bearing frame body assembly to be converted between the stretcher in the first state and the wheelchair in the second state. The device can be quickly switched between a stretcher and a wheelchair, different transportation and moving requirements are met, multifunctionality is provided to cope with different first-aid scenes, the moving wheel train assembly comprises ground wheels, table top wheels and lifting wheels, flexibility and adaptability are provided for movement of the device on different ground surfaces and table tops, and the device is convenient to use. And the supporting deformation assembly provides the height and angle adjusting function of the equipment through the combination of a telescopic frame and an adjusting frame, and the requirements of patients with different body types are met.

Description

Technical Field

[0001] The present invention relates to the technical field of first-aid transfer stretchers, and more particularly to an integrated device for a multi-morphological conversion wheelchair stretcher for ambulances. Background Art

[0002] In the field of emergency medical treatment, the stretcher for ambulances is one of the key devices, responsible for safely and effectively transferring patients from the accident scene to medical institutions. Existing ambulance stretchers usually consist of a sturdy frame, a comfortable cushion, and adjustable head and leg supports. Its main function is to provide a stable and safe flat lying surface to facilitate the rapid transfer of patients in case of emergency.

[0003] Although existing stretchers are effective in most cases, when dealing with patients who require special sitting and lying postures, they have the following disadvantages: fixed posture limitation, traditional stretchers are usually designed as flat surfaces and cannot meet the needs of patients who need to maintain specific postures, such as some fracture patients or those with heart failure who cannot lie flat and have difficulty breathing; lack of flexibility, when a patient needs to convert from lying to sitting, the adjustment range of traditional stretchers is limited, which may cause discomfort or further health risks; operational complexity, for patients who need to frequently adjust their postures, operating a traditional stretcher may require additional manpower and time, affecting the efficiency of emergency transfer.

[0004] In some medical situations, patients may need to maintain a specific sitting and lying posture to prevent the deterioration of their condition or improve their comfort. For example, patients with acute left heart failure need to sit upright to breathe, patients with respiratory diseases may need a semi-sitting position to facilitate breathing, patients with spinal injuries may need a specific posture to protect the spine and reduce pain, and patients with head injuries need a specific head angle to reduce pressure and promote recovery. Existing stretcher designs often cannot fully meet these special needs, resulting in patients possibly facing discomfort or risks during the transfer process. Summary of the Invention

[0005] In order to solve the problem that existing stretchers have a single function and cannot meet the various sitting and lying posture requirements of transferred patients, and to improve the safety and comfort of patients during transfer, the present invention provides an integrated device for a multi-morphological conversion wheelchair stretcher for ambulances.

[0006] The integrated device for a multi-morphological conversion wheelchair stretcher for ambulances provided by the present invention adopts the following technical solutions: A multi - form conversion wheelchair stretcher integrated device for ambulances, comprising a carrier body assembly and a mobile wheel system assembly. The mobile wheel system assembly is installed at the bottom of the carrier body assembly, and the mobile wheel system assembly supports and drives the movement of the carrier body assembly. The carrier body assembly is connected and installed with a support deformation assembly, and the support deformation assembly supports the carrier body assembly. The carrier body assembly and the mobile wheel system assembly are controlled and locked by a locking and fixing assembly. The support deformation assembly controls the conversion of the carrier body assembly between a stretcher in the first state and a wheelchair in the second state.

[0007] This device can flexibly convert between the stretcher and wheelchair states to meet the needs of different patients. The stretcher in the first state provides a stable lying surface, suitable for general emergency transportation; the wheelchair in the second state allows the patient to move in a sitting position, especially suitable for patients who need to maintain a specific sitting or lying posture, such as patients with respiratory diseases or spinal injuries. The support deformation assembly provides precise posture adjustment to ensure the comfort and safety of the patient in different states. By adjusting the angle and height, the device can meet the special medical needs of the patient and reduce discomfort during transportation. The locking and fixing assembly ensures the stability and safety of the conversion process. Ambulance personnel can quickly switch the device state, saving time and human resources. In emergency situations, this simplified operation process is particularly important and improves the emergency rescue efficiency. The mobile wheel system assembly enables the device to move easily and adapt to the needs of different terrains and environments. This not only improves the flexibility of patient transportation but also reduces the risks that may be caused to the patient during handling. By integrating the stretcher and wheelchair functions into one device, the space in the ambulance is saved, facilitating the placement and use of other emergency equipment. Such a designed device not only enhances the overall functional configuration of the ambulance but also reduces the complexity of equipment management.

[0008] Further, the carrier body assembly includes a back support, a hip support, and a leg support. The back support and the leg support are respectively swing - mounted on the front and rear sides of the hip support, and an auxiliary support is installed on one side of the hip support.

[0009] Through the swinging installation of the back support and the leg support, the patient can adjust the sitting and lying postures according to personal needs. This design allows for more delicate posture adjustment to meet various special medical needs, such as patients who need to sit semi-upright or have specific leg angles. The hip support provides a stable core support to ensure the safety of the patient during transportation. The design of the auxiliary support further enhances the overall stability, especially when the patient needs a specific posture or maintains a certain posture for a long time, effectively reducing discomfort. This modular support design enables ambulance personnel to quickly adjust the patient's posture to adapt to different emergency situations. This flexibility not only improves the emergency response efficiency but also reduces the potential risks caused by improper posture adjustment. Through precise support and adjustment, the patient's experience during transportation is more comfortable, helping to relieve the pressure and pain caused by improper postures, which is particularly important for long-distance transportation. The combination of the back, hip, and leg supports enables the device to adapt to the body shapes and health conditions of different patients, providing personalized support and meeting diverse emergency needs.

[0010] Furthermore, a back pad is provided on the upper surface of the back support, a hip pad is provided on the upper surface of the hip support, and a leg pad is provided on the upper surface of the leg support. The back pad, hip pad, and leg pad are all made of soft materials. A back rib is fixedly provided on the lower surface of the back support, a support rib is fixedly provided on the lower surface of the hip support, and a bottom rib is fixedly provided on the lower surface of the leg support. The back rib, support rib, and bottom rib are all made of steel section material, and at least two are vertically provided.

[0011] The back pad, hip pad, and leg pad are all made of soft materials, which can effectively relieve the pressure points of the patient during transportation and provide more comfortable support. This design reduces the discomfort caused by hard surfaces, especially when used for a long time, which is particularly important. The back rib, support rib, and bottom rib are all made of steel section material, providing a strong support structure. The high strength and durability of the steel section material ensure the stability of the device during use and reduce the risks that may be caused by equipment failure.

[0012] Furthermore, a headrest is provided on the back pad. Through holes are opened on the hip support and the hip pad, and a plugging plate is swingably installed in the through holes. One end of the plugging plate is hinged to one side edge of the through hole, and the other end is controllably locked and installed on the other side edge of the through hole through a lock block. Straps are provided on the leg support and the leg pad. The auxiliary support includes a hanging bracket, and the hanging bracket is installed on one side of the hip support through a mounting buckle.

[0013] The headrest provided on the backrest offers additional head support, enhancing the comfort of the patient's head and neck. Especially during long periods of lying down, it can effectively relieve neck pressure and discomfort. The hip support and the through-holes provided on the hip pad achieve the function of facilitating the patient's excretion. The blocking plate swing-mounted inside the through-hole can be opened and closed as needed to ensure a closed state when not in use, improving the hygiene conditions of the device. The leg support and the straps provided on the leg pad can effectively fix the patient's legs, preventing sliding or falling caused by vibration or accidents during transportation, increasing the safety of the patient. The hanging bracket is installed on one side of the hip support through a mounting buckle, providing additional support or hanging function, and can be used to hang infusion bags or other medical devices, increasing the functionality and practicality of the device.

[0014] Further, the mobile wheel system assembly includes ground wheels and table wheels. The ground wheels are installed on the bottom side of the support bracket body assembly through swing rods. The swing rods are hinged to the bottom side of the support bracket body assembly. One side of the swing rod is connected to a support rod and controlled to swing through the support rod. The support rod is an inclined support folding rod. The table wheels are installed on the bottom side of the support bracket body assembly through adjustment screws. The adjustment screws are threadedly connected to the bottom side of the support bracket body assembly through adjustment nuts.

[0015] The combined use of ground wheels and table wheels improves the adaptability of the device in different environments. The ground wheels can be used for free movement on the ground, while the table wheels help with operations on tables or other surfaces with height differences, providing convenience for various usage scenarios. The ground wheels are installed on the bottom side of the support bracket body assembly through swing rods, and the hinged design allows the ground wheels to be adjusted as needed. The support rod is an inclined support folding rod, which can provide additional support and stability to prevent accidental tilting or overturning during movement. The support rod controls the swing through the connecting support rod, allowing for quick adjustment of the angle and position of the ground wheels to meet different operation requirements. The inclined support folding rod design is convenient for storage when not in use, reducing the occupied space. The table wheels are installed through adjustment screws, and the screws are threadedly connected to the bottom side of the support bracket body assembly through adjustment nuts. This design allows for fine adjustment of the height of the table wheels to adapt to the height differences of different worktables, ensuring smoothness and comfort during operation.

[0016] Further, the mobile wheel system assembly further includes lifting wheels. The lifting wheels are controlled to be lifted and installed on the bottom side of the support bracket body assembly through a folding frame, and at least one set of folding frames is provided on the bottom side of the support bracket body assembly. The upper end of the folding frame is connected to the bottom side of the support bracket body assembly, and the lower end is connected to and installed with a mounting base plate. The lifting wheels are rotatably installed on both sides of the mounting base plate. A lifting support rod is installed at the hinge joint of the folding frame. The lifting support rod is threadedly connected to a control screw and controlled to push and fold up and down through the control screw. A rotating handle is provided at the end of the control screw.

[0017] The lifting wheel, through the design of the folding frame and the lifting strut, can flexibly adjust the height of the wheelchair according to different needs. The folding frame provides a stable support structure to ensure the stability during the lifting process. The lifting strut controls the screw rod through a threaded connection, enabling precise height adjustment and providing a safe and reliable operation experience for users. The design of the folding frame allows the wheelchair to be folded and stored when not in use, reducing space occupancy.

[0018] Further, the support deformation assembly includes a telescopic frame. The telescopic frame is telescopically installed on both sides of the fixed frame. The fixed frame is fixedly installed on the bottom side of the hip support of the carrier body assembly. Armrest frames are provided on both sides of the fixed frame to control the lifting. The bottom side of the armrest frame is fixed by a toothed lock. The toothed lock is elastically arranged and elastically moved by an unlocking handle.

[0019] The telescopic frame is installed on both sides of the fixed frame, enabling the support assembly to be telescopically adjusted according to the needs of the user. This design allows the stretcher and the wheelchair to adapt to different usage environments, providing better comfort and flexibility. The fixed frame is fixedly installed on the bottom side of the hip support of the carrier body assembly, providing a stable foundation. Further, the support deformation assembly further includes an adjustment frame. The adjustment frame is divided into two sections and is threadedly connected by a telescopic screw rod. The telescopic screw rod and the worm gear rod are connected by a worm and worm gear, and the worm gear rod controls the rotation of the telescopic screw rod. An adjustment handwheel is provided at the end of the worm gear rod.

[0020] The design of the armrest frame is mainly used to support and protect the patient, preventing them from falling sideways on the wheelchair. This function is crucial for the safety of the patient, especially for those who need additional support and protection. The design of the toothed lock allows the armrest frame to be quickly fixed and released when needed, enabling the caregiver to easily lift and move the patient from one side, greatly simplifying the transfer process and improving the operation efficiency. The toothed lock provides a safe locking mechanism to ensure that the armrest frame will not accidentally loosen when in the fixed position, protecting the safety of the patient, especially during the movement or when additional support is required.

[0021] Further, the locking and fixing assembly includes a braking component. The braking component is installed on the carrier body assembly and the mobile wheel system assembly and controls the restriction of movement of the carrier body assembly and the mobile wheel system assembly. The braking component includes a grip and a brake pad. The grip is installed at the end of the carrier body assembly, and the brake pad is installed on the mobile wheel system assembly. The grip and the brake pad are hydraulically connected to each other, and the grip controls the brake pad through hydraulic transmission.

[0022] The braking component is installed on the carrier body assembly and the mobile wheel assembly. Through the combination of the grip and the brake pad, the movement of the carrier body assembly and the mobile wheel assembly can be effectively controlled. The grip is installed at the end of the carrier body assembly, which is convenient for users or caregivers to operate. Through hydraulic transmission connection, the grip can easily control the start and stop of the brake pad. The brake pad is installed on the mobile wheel assembly to ensure that braking force can be quickly and effectively applied when needed, restricting the movement of the wheelchair. When a fixed position is required, the braking component can effectively prevent the accidental movement of the wheelchair, especially on inclined or uneven ground, providing higher safety and stability and protecting the user from unnecessary risks.

[0023] Furthermore, the locking and fixing component further includes a ground lock component. The ground lock component is installed in the ambulance or on the tabletop that needs to be fixed. The ground lock component is used to lock and restrict the movement of the carrier body assembly and the mobile wheel assembly. The ground lock component includes a ground hook and a tail stop rod. The installation position of the ground hook corresponds to the front ends of the carrier body assembly and the mobile wheel assembly, and is used to restrict the forward movement of the carrier body assembly and the mobile wheel assembly. The installation position of the tail stop rod corresponds to the rear ends of the carrier body assembly and the mobile wheel assembly, and is used to restrict the backward movement of the carrier body assembly and the mobile wheel assembly. The tail stop rod is controllably swingably fixedly installed on the fixed installation surface. A striking rod is provided on the tail stop rod. The striking rod and the tail stop rod are arranged at an angle of 70°-90° to each other. A lock hole is provided on the striking rod. The lock hole is locked and connected with the clamping block. The clamping block is elastically arranged through a locking spring. The clamping block is elastically moved through an unlocking wedge block. The unlocking wedge block is connected to a stepping lever through a lever.

[0024] The ground lock component includes a ground hook and a tail stop rod, which respectively restrict the forward and backward movement of the carrier body assembly and the mobile wheel assembly. This design ensures that the wheelchair can maintain stability when in a fixed position, especially in an environment such as an ambulance that requires safe transportation, providing higher safety. When the stretcher moves to a predetermined position, the striking rod can interact with the tail stop rod through its specific angle design, hitting and automatically triggering the flipping of the tail stop rod during the movement of the stretcher. This automatic mechanism ensures that the tail stop rod can quickly lock after the stretcher moves into place, providing an immediate fixing effect. The automatic function of the striking rod simplifies the locking process, enabling the caregiver to focus on other emergency tasks. The locking component provides a simple unlocking operation process through the unlocking wedge block and the stepping lever connected by the lever. The caregiver can quickly cancel or set the locked state by stepping on the lever, facilitating the quick movement of the stretcher and the patient.

[0025] In summary, the present invention has the following beneficial technical effects: 1. The device can quickly switch between a stretcher and a wheelchair, adapting to different transportation and movement requirements, providing versatility to cope with different first aid scenarios.

[0026] 2. The support bracket body assembly provides comfortable support for various parts of the human body through the combination of back, hip and leg supports, ensuring the comfort and safety of the patient during movement.

[0027] 3. The locking and fixing assembly includes a brake member and a ground lock member, providing a dual locking mechanism to ensure that no accidental sliding occurs during transportation, improving the safety and reliability of the equipment.

[0028] 4. The bumper bar can automatically trigger the locking of the tail stop bar, simplifying the locking operation, reducing the need for intervention by nursing staff, and improving the operation efficiency.

[0029] 5. The mobile wheel assembly includes ground wheels, tabletop wheels and lifting wheels, providing flexibility and adaptability for the movement of the equipment on different grounds and tabletops, ensuring quick response and convenient transportation.

[0030] 6. The back pad, hip pad and leg pad are made of soft materials, providing comfortable support, and the leg support is equipped with straps to ensure the stability and comfort of the patient.

[0031] 7. The support deformation assembly provides the height and angle adjustment functions of the equipment through the combination of a telescopic frame and an adjustment frame, meeting the needs of patients with different body types.

[0032] 8. The brake pads and ground lock members controlled by hydraulic transmission can quickly lock the equipment, which is suitable for quick fixing and unlocking in emergency situations.

[0033] 9. The design of the rotating handle and adjustment handwheel makes the adjustment and control of the equipment more convenient, facilitating various operation adjustments by nursing staff.

[0034] 10. The back ribs, support ribs and bottom ribs made of section steel improve the overall strength and durability of the equipment, ensuring stability and reliability during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of the morphological structure of the folding stretcher of the present invention; Figure 2 is Figure 1 a schematic diagram of the structure from another perspective; Figure 3 is Figure 2 a partially enlarged schematic diagram at position A of Figure 4 is Figure 2 a partially enlarged schematic diagram at position B of Figure 5 is Figure 2 a partially enlarged schematic diagram at position C of Figure 6 is a schematic diagram of the ground lock member structure of the present invention; Figure 7 Schematic structural diagram of the stretcher form unfolded for the present invention; Figure 8 Schematic structural diagram of the wheelchair form for the present invention; Figure 9 is Figure 8 Another perspective structural diagram of

[0036] Explanation of reference numerals: 1. Bracket body assembly, 11. Back support, 111. Back pad, 112. Back rib, 113. Headrest, 12. Hip support, 121. Hip pad, 122. Through hole, 123. Plugging plate, 124. Lock block, 125. Support rib, 13. Leg support, 131. Leg pad, 132. Bottom rib, 133. Strapping, 14. Auxiliary support, 141. Hanger, 142. Mounting buckle; 2. Moving wheel system assembly, 21. Ground wheel, 211. Swing rod, 212. Support rod, 22. Table top wheel, 221. Adjusting screw, 222. Adjusting nut, 23. Lifting wheel, 231. Folding frame, 232. Mounting base plate, 233. Lifting support rod, 234. Control screw, 235. Rotating handle; 3. Support deformation assembly, 31. Telescopic frame, 311. Fixed frame, 312. Armrest frame, 313. Teeth, 314. Unlocking handle, 32. Adjusting frame, 321. Telescopic screw, 322. Worm gear rod, 323. Adjusting handwheel; 4. Locking and fixing assembly, 41. Brake component, 411. Grip, 412. Brake pad, 42. Ground lock component, 421. Ground hook, 422. Tail stop rod, 423. Bump rod, 424. Lock hole, 425. Clamping block, 426. Locking spring, 427. Unlocking wedge, 428. Trampling lever. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached Figures 1-9 , and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0039] An embodiment of the present invention discloses a multi-morphology conversion wheelchair stretcher integrated device for ambulances. Referring to Figure 1 , it includes a carrier body assembly 1 and a mobile wheel assembly 2. The mobile wheel assembly 2 is installed at the bottom of the carrier body assembly 1, and the mobile wheel assembly 2 supports and drives the carrier body assembly 1 to move. The carrier body assembly 1 is connected and installed with a support deformation assembly 3. The support deformation assembly 3 supports and bears the carrier body assembly 1, and the carrier body assembly 1 and the mobile wheel assembly 2 are controlled and locked by a locking and fixing assembly 4. The support deformation assembly 3 controls the transformation of the carrier body assembly 1 between a stretcher in the first state and a wheelchair in the second state.

[0040] Referring to Figure 1 and Figure 2 , the carrier body assembly 1 includes a back support 11, a hip support 12, and a leg support 13. The back support 11 and the leg support 13 are respectively swingably installed on the front and rear sides of the hip support 12, and an auxiliary support 14 is installed on one side of the hip support 12.

[0041] The back support 11, the hip support 12, and the leg support 13 are hinged to each other, and the auxiliary support 14 can also be used to assist in lifting the patient's limbs.

[0042] Referring to Figure 1 and Figure 7 , a back pad 111 is provided on the upper surface of the back support 11, a hip pad 121 is provided on the upper surface of the hip support 12, a leg pad 131 is provided on the upper surface of the leg support 13. The back pad 111, the hip pad 121, and the leg pad 131 are all made of soft materials. A back rib 112 is fixedly provided on the lower surface of the back support 11, a support rib 125 is fixedly provided on the lower surface of the hip support 12, and a bottom rib 132 is fixedly provided on the lower surface of the leg support 13. The back rib 112, the support rib 125, and the bottom rib 132 are all made of section steel, and at least two are vertically provided.

[0043] The back pad 111, the hip pad 121, and the leg pad 131 are all made of sponge material and are covered with leather or dense cloth on the outside, which is convenient for cleaning. When in use, a sterilized and disinfected disposable sheet is laid on the upper surface.

[0044] Reference Figure 1 and Figure 9 Figure 9 , a headrest 113 is provided on the backrest 111, through holes 122 are formed in the hip support 12 and the hip pad 121, a blocking plate 123 is swingably installed in the through holes 122, one end of the blocking plate 123 is hinged to one side edge of the through hole 122, and the other end is controlled by a locking block 124 to be locked and installed on the other side edge of the through hole 122. Straps 133 are provided on the leg support 13 and the leg pad 131; When the through holes 122 are in use, first deform into a wheelchair form, then push open the locking block 124, the blocking plate 123 swings to open the through holes 122, and then place utensils such as a bedpan in the through holes. The blocking plate 123 is also provided with a soft pad.

[0045] The auxiliary support 14 includes a hanging frame 141, and the hanging frame 141 is installed on one side of the hip support 12 through a mounting buckle 142; The hanging frame 141 is inserted into the mounting buckle 142, and the hanging frame 141 is clamped in the mounting buckle 142 and is convenient to be pulled out upward. The mounting buckle 142 can also be used to insert pipe fittings with a circular cross-section or a square cross-section.

[0046] Reference Figure 1 and Figure 7 Figure 7 , the mobile wheel system assembly 2 includes a ground wheel 21 and a table top wheel 22. The ground wheel 21 is installed on the bottom side of the carrier body assembly 1 through a swing rod 211. The swing rod 211 is hinged to the bottom side of the carrier body assembly 1. One side of the swing rod 211 is connected to a support rod 212 and is controlled to swing by the support rod 212. The support rod 212 is an inclined strut folding rod. The table top wheel 22 is installed on the bottom side of the carrier body assembly 1 through an adjustment screw 221. The adjustment screw 221 is threadedly connected to the bottom side of the carrier body assembly 1 through an adjustment nut 222.

[0047] When pushing a patient to move on the ground, the ground wheel 21 is used. The swing rod 211 swings downward to achieve vertical placement. At this time, the ground wheel 21 contacts the ground, and the support rod 212 is deployed to be obliquely supported on one side of the swing rod 211. A damping lock is provided at the hinge point of the support rod 212.

[0048] Reference Figure 8 and Figure 9, the mobile wheel assembly 2 further includes a lifting wheel 23. The lifting wheel 23 is controlled to be lifted and installed on the bottom side of the carrier body assembly 1 through a folding frame 231, and at least one set of folding frames 231 is arranged on the bottom side of the carrier body assembly 1. The upper end of the folding frame 231 is connected to the bottom side of the carrier body assembly 1, and the lower end is connected and installed with a mounting base plate 232. The lifting wheel 23 is rotatably installed on both sides of the mounting base plate 232. A lifting support rod 233 is installed at the hinge joint of the folding frame 231. The lifting support rod 233 is threadedly connected to a control screw rod 234 and is controlled by the control screw rod 234 to push and fold up and down, and a rotating handle 235 is arranged at the end of the control screw rod 234.

[0049] Refer to Figure 4 and Figure 7 , the support deformation assembly 3 includes a telescopic frame 31. The telescopic frame 31 is telescopically installed on both sides of a fixed frame 311. The fixed frame 311 is fixedly installed on the bottom side of the hip support 12 of the carrier body assembly 1. Armrest frames 312 are controlled to be lifted on both sides of the fixed frame 311. The bottom side of the armrest frame 312 is controlled and fixed by a tooth 313. The tooth 313 is elastically arranged and is controlled to elastically move by an unlocking handle 314.

[0050] When it is deformed into a stretcher, first push the telescopic frame 31 to extend close to the hip support 12.

[0051] One side of the bottom end of the armrest frame 312 is provided with a notch. The tooth 313 is pushed into the notch by a spring to lock the armrest frame 312. When it is necessary to lower the armrest frame 312, pull the unlocking handle 314 to one side. The unlocking handle 314 drives the tooth 313 to move to one side, releasing the armrest frame 312 to fall. When lifting, it only needs to be lifted to be automatically clamped in place.

[0052] Refer to Figure 3 , the support deformation assembly 3 further includes an adjustment frame 32. The adjustment frame 32 is divided into two sections and is threadedly connected by a telescopic screw rod 321. The telescopic screw rod 321 and a worm gear rod 322 are connected by a worm gear and a worm, and the worm gear rod 322 controls the telescopic screw rod 321 to rotate. An adjustment handwheel 323 is arranged at the end of the worm gear rod 322.

[0053] By rotating the worm gear rod 322, the worm on the worm gear rod 322 rotates and drives the worm gear on the telescopic screw rod 321 to rotate. The rotation of the worm gear drives the telescopic screw rod 321 to rotate. The telescopic screw rod 321 drives the adjustment frame 32 to extend and contract through the thread.

[0054] The telescopic screw rod 321 of the back support 11 jacks up the back support 11 to form an inclined backrest, and the telescopic screw rod 321 of the leg support 13 pulls down the leg support 13 to form an inclined leg support plate, realizing the transformation into the sitting and lying structure of a wheelchair.

[0055] Reference Figure 8 and Figure 9 The locking and fixing assembly 4 includes a braking member 41. The braking member 41 is installed on the support bracket body assembly 1 and the moving wheel system assembly 2, and controls the support bracket body assembly 1 and the moving wheel system assembly 2 to restrict movement. The braking member 41 includes a grip 411 and a brake pad 412. The grip 411 is installed at the end of the support bracket body assembly 1, the brake pad 412 is installed on the moving wheel system assembly 2, the grip 411 and the brake pad 412 are connected to each other through hydraulic transmission, and the grip 411 controls the brake pad 412 through hydraulic transmission.

[0056] Reference Figure 5 and Figure 6 The locking and fixing assembly 4 further includes a ground lock member 42. The ground lock member 42 is installed in the ambulance or on the tabletop to be fixed, and the ground lock member 42 is used to lock and restrict the movement of the support bracket body assembly 1 and the moving wheel system assembly 2. The ground lock member 42 includes a ground hook 421 and a tail stop rod 422. The installation position of the ground hook 421 corresponds to the front ends of the support bracket body assembly 1 and the moving wheel system assembly 2, and is used to restrict the forward movement of the support bracket body assembly 1 and the moving wheel system assembly 2. The installation position of the tail stop rod 422 corresponds to the rear ends of the support bracket body assembly 1 and the moving wheel system assembly 2, and is used to restrict the backward movement of the support bracket body assembly 1 and the moving wheel system assembly 2. The tail stop rod 422 is controlled to swing and fixedly installed on the fixed installation surface. A striking rod 423 is provided on the tail stop rod 422. The striking rod 423 and the tail stop rod 422 are arranged at an angle of 70° - 90° to each other. A lock hole 424 is provided on the striking rod 423. The lock hole 424 is locked and connected to a clamping block 425. The clamping block 425 is elastically arranged through a locking spring 426. The clamping block 425 is controlled to elastically move through an unlocking wedge block 427. The unlocking wedge block 427 is connected to a stepping lever 428 through a lever.

[0057] The telescopic frame 31 at the front end is at a higher height and cannot hit the striking rod 423. The telescopic frame 31 at the rear end is at a lower height and can hit the striking rod 423. After the striking rod 423 is hit, it flips and drives the tail stop rod 422 to flip. The clamping block 425 is inserted into the lock hole 424 to vertically fix the tail stop rod 422.

[0058] When unlocking, step on the stepping lever 428. The stepping lever 428 drives the unlocking wedge block 427 to pry. The unlocking wedge block 427 pushes the clamping block 425 away to release the tail stop rod 422. Note that the tail stop rod 422 is heavier than the striking rod 423, and the unlocking wedge block 427 is also heavier than the stepping lever 428.

[0059] Embodiment 1: The above technical content supplements and specifically describes the following differences: Reference Figure 2 and Figure 9 The back braces 112, the support braces 125 and the bottom braces 132 are all provided with three pieces, which are hinged and connected in series with each other.

[0060] The headrest 113 is an inflatable pillow, and the height of the pillow is adjusted by inflating or deflating.

[0061] Reference Figure 1 The hanging bracket 141 is a rod with adjustable telescopic length.

[0062] Embodiment 2: The above technical content supplements and specifically illustrates the following differences: Reference Figure 2 and Figure 7 Four groups of swing rods 211 are provided. Two groups are respectively installed and hinged on both sides of one end of the back support 11 away from the hip support 12, and the other two groups are respectively installed and hinged on both sides of one end of the leg support 13 close to the hip support 12.

[0063] When used as a stretcher bed, it is pushed towards the backrest 111 side.

[0064] Reference Figure 2 and Figure 7 The ground wheels 21 and the table wheels 22 are universal wheels. The table wheels 22 are installed at the end of the telescopic frame 31 and move telescopically with the telescopic frame 31.

[0065] Embodiment 3: The above technical content supplements and specifically illustrates the following differences: Reference Figure 8 and Figure 9 The folding frame 231 includes multiple groups of swing rods arranged crosswise. There are two connection points at the upper end, one of which is fixedly hinged and the other slides along the limit groove. The two connection points at the lower end are arranged in the same way. The control screw 234 is respectively connected to the two lifting support rods 233. By rotating the control screw 234, the two lifting support rods 233 are controlled to move away from each other, so that the two groups of folding frames 231 move to both sides and extend synchronously.

[0066] Reference Figure 2 and Figure 9 The same worm gear rod 322 connects the two sets of telescopic screw rods 321 to realize the synchronous telescopic movement of the two sets of telescopic screw rods 321.

[0067] Embodiment 4: The above technical content supplements and specifically illustrates the following differences: Reference Figure 1 and Figure 2 The ground hook 421 includes two backward hooks. When the support bracket body assembly 1 and the mobile wheel system assembly 2 move, the adjustment screw 221 of the table wheel 22 hits the ground hook 421 and stops moving.

[0068] Reference Figure 5 and Figure 6 Figure 6 , the collision rod 423 and the tail stop rod 422 are 75° to each other.

[0069] The above content is only an example and illustration of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar ways to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A multi - form conversion wheelchair stretcher integrated device for ambulances, comprising a carrier body assembly (1) and a mobile wheel system assembly (2). The mobile wheel system assembly (2) is installed at the bottom of the carrier body assembly (1), and the mobile wheel system assembly (2) supports and drives the movement of the carrier body assembly (1). It is characterized in that: The carrier body assembly (1) is connected and installed with a support deformation assembly (3). The support deformation assembly (3) supports and bears the carrier body assembly (1), and the carrier body assembly (1) and the mobile wheel system assembly (2) are controlled and locked by a locking and fixing assembly (4); The support deformation assembly (3) controls the transformation of the carrier body assembly (1) between a stretcher in the first state and a wheelchair in the second state.

2. The multi - form conversion wheelchair stretcher integrated device for ambulance according to claim 1, wherein: The carrier body assembly (1) includes a back support (11), a hip support (12), and a leg support (13). The back support (11) and the leg support (13) are respectively swing - mounted on the front and rear sides of the hip support (12), and an auxiliary support (14) is installed on one side of the hip support (12).

3. The integrated device for a multi - form conversion wheelchair stretcher used in an ambulance according to claim 2, wherein: On the upper surface of the back support (11), there is a back pad (111). On the upper surface of the hip support (12), there is a hip pad (121). On the upper surface of the leg support (13), there is a leg pad (131). The back pad (111), the hip pad (121), and the leg pad (131) are all made of soft materials. On the lower surface of the back support (11), there is a back rib (112) fixedly provided. On the lower surface of the hip support (12), there is a support rib (125) fixedly provided. On the lower surface of the leg support (13), there is a bottom rib (132) fixedly provided. The back rib (112), the support rib (125), and the bottom rib (132) are all made of profiled steel material, and at least two are arranged vertically.

4. The integrated device for a multi - form conversion wheelchair stretcher for an ambulance according to claim 3, wherein: There is a headrest (113) on the back pad (111). Through holes (122) are opened on the hip support (12) and the hip pad (121). A plugging plate (123) is swing - mounted in the through holes (122). One end of the plugging plate (123) is hinged at one side edge of the through hole (122), and the other end is controlled and locked by a lock block (124) and installed at the other side edge of the through hole (122). Straps (133) are provided on the leg support (13) and the leg pad (131); The auxiliary support (14) includes a hanging frame (141), and the hanging frame (141) is installed on one side of the hip support (12) through a mounting buckle (142).

5. The integrated device for a multi-morphological conversion wheelchair stretcher used in an ambulance according to claim 1, wherein: The mobile wheel system assembly (2) includes ground wheels (21) and table wheels (22). The ground wheels (21) are installed on the bottom side of the carrier body assembly (1) through swing rods (211). The swing rods (211) are hinged on the bottom side of the carrier body assembly (1). One side of the swing rod (211) is connected to a support rod (212) and is controlled to swing through the support rod (212). The support rod (212) is an inclined - support folding rod. The table wheels (22) are installed on the bottom side of the carrier body assembly (1) through adjusting screws (221). The adjusting screws (221) are thread - connected to the bottom side of the carrier body assembly (1) through adjusting nuts (222).

6. The integrated device for a multi - form conversion wheelchair stretcher used in an ambulance according to claim 1 or 5, characterized in that: The mobile wheel set assembly (2) further includes a lifting wheel (23). The lifting wheel (23) is controlled to be installed on the bottom side of the support bracket body assembly (1) through a folding bracket (231), and at least one set of folding brackets (231) is arranged on the bottom side of the support bracket body assembly (1). The upper end of the folding bracket (231) is connected to the bottom side of the support bracket body assembly (1), and the lower end is connected to and installed with a mounting base plate (232). The lifting wheel (23) is rotatably installed on both sides of the mounting base plate (232). A lifting support rod (233) is installed at the hinge node of the folding bracket (231). The lifting support rod (233) is threadedly connected to a control screw rod (234) and is controlled by the control screw rod (234) to push and fold up and down. A rotating handle (235) is arranged at the end of the control screw rod (234).

7. The integrated device for a multi-morphology conversion wheelchair stretcher used in an ambulance according to claim 1, wherein: The support deformation assembly (3) includes a telescopic frame (31). The telescopic frame (31) is telescopically installed on both sides of a fixed frame (311). The fixed frame (311) is fixedly installed on the bottom side of the hip support (12) of the support bracket body assembly (1). Armrest frames (312) are controlled to be lifted and lowered on both sides of the fixed frame (311). The bottom side of the armrest frame (312) is controlled to be fixed through a tooth (313). The tooth (313) is elastically arranged and is controlled to elastically move through an unlocking handle (314).

8. The integrated device for multi - form conversion wheelchair stretcher for ambulance according to claim 1 or 7, characterized in that: The support deformation assembly (3) further includes an adjusting frame (32). The adjusting frame (32) is divided into two sections and is threadedly connected through a telescopic screw rod (321). The telescopic screw rod (321) is connected to a worm gear rod (322) through a worm and gear, and the worm gear rod (322) controls the rotation of the telescopic screw rod (321). An adjusting handwheel (323) is arranged at the end of the worm gear rod (322).

9. The integrated device for a multi-morphological conversion wheelchair stretcher used in an ambulance according to claim 1, wherein: The locking and fixing assembly (4) includes a braking member (41). The braking member (41) is installed on the support bracket body assembly (1) and the mobile wheel set assembly (2) and controls the support bracket body assembly (1) and the mobile wheel set assembly (2) to be restricted from moving; The braking member (41) includes a grip (411) and a brake pad (412). The grip (411) is installed at the end of the support bracket body assembly (1). The brake pad (412) is installed on the mobile wheel set assembly (2). The grip (411) and the brake pad (412) are connected to each other through hydraulic transmission, and the grip (411) controls the brake pad (412) through hydraulic transmission.

10. The integrated device for a multi-morphological conversion wheelchair stretcher for an ambulance according to claim 1 or 9, characterized in that: The locking and fixing assembly (4) further includes a ground lock member (42). The ground lock member (42) is installed in an ambulance or on a tabletop to be fixed. The ground lock member (42) is used to lock the support bracket body assembly (1) and the mobile wheel set assembly (2) and restrict their movement; The ground lock member (42) includes a ground hook (421) and a tail stop rod (422). The installation position of the ground hook (421) corresponds to the front ends of the support frame body assembly (1) and the moving wheel system assembly (2), and is used to restrict the forward movement of the support frame body assembly (1) and the moving wheel system assembly (2). The installation position of the tail stop rod (422) corresponds to the rear ends of the support frame body assembly (1) and the moving wheel system assembly (2), and is used to restrict the backward movement of the support frame body assembly (1) and the moving wheel system assembly (2). The tail stop rod (422) is controllably swingably mounted on a fixed mounting surface. A striker (423) is provided on the tail stop rod (422). The striker (423) is disposed at an angle of 70° - 90° with respect to the tail stop rod (422). A lock hole (424) is formed in the striker (423). The lock hole (424) is lockingly connected to a clamping block (425). The clamping block (425) is elastically disposed by a locking spring (426). The clamping block (425) is controllably elastically moved by an unlocking wedge block (427). The unlocking wedge block (427) is connected to a treadle lever (428) through a lever.

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