Nursing bed

Abstract

The nursing bed comprises a bed frame, a mattress and a driving mechanism arranged at the bottom of the bed frame, and the bed frame comprises a frame body structure formed by sequentially and rotatably connecting a first deformation frame, a second deformation frame, a third deformation frame and a fourth deformation frame. Each deformation frame is composed of a first main frame and a turnover frame, and linkage turnover is achieved through a turnover mechanism. A planetary gear set, double camshafts and a rocker arm are arranged in the turnover mechanism and used for conducting power switching between turnover of the bed body and movement of the mattress, and therefore turnover assistance of the patient is achieved. Bevel gear couplings are arranged between the adjacent deformation frames and matched with pawl locking mechanisms, and linkage adjustment and posture locking of the multiple sections of frame bodies are achieved. The bed tail rail is provided with a telescopic structure, so that the nursing bed can be switched between a bed form and a wheelchair form. A turnover mechanism is arranged below the third deformation frame and used for defecation or cleaning and nursing. The intelligent medical nursing device is high in structural integration level, multi-form continuous switching can be achieved, nursing intensity is reduced, and nursing safety and efficiency are improved.

Description

Technical Field

[0001] This invention belongs to the field of nursing equipment technology, and specifically relates to a nursing bed. Background Technology

[0002] With the deepening of population aging and the continuous increase in the number of long-term bedridden patients, nursing institutions and home care scenarios have placed higher demands on the functional integration and usage scenarios of nursing equipment. Especially in the process of critical care, rehabilitation care and care for disabled elderly, there is an urgent need for a composite nursing device that can assist patients in performing multiple operations such as lying down to rest, sitting care, turning over assistance, short-distance movement, and bathing care.

[0003] Most existing nursing beds are designed primarily for basic nursing care, with functions typically limited to overall height adjustment or backrest angle adjustment. The bed surface structure is usually fixed or simply segmented and foldable. During use, patients can generally only achieve a lying or limited sitting position on the bed, making it difficult to transition from a supine to a wheelchair-like sitting position within the same device. Furthermore, it cannot meet the needs of patients for multiple continuous procedures such as wheelchair movement, short-distance travel, and bathing while on the bed. In actual nursing care, patients still need to be frequently transferred from the nursing bed to wheelchairs, bath chairs, or other assistive devices, which is not only complex but also poses significant safety hazards.

[0004] To improve the functionality of nursing beds, multi-section deformable nursing beds have gradually emerged. However, the power transmission structure of such devices is usually distributed, with each section of the bed surface driven by an independent actuator, lacking an effective linkage control mechanism. When continuous posture changes are required, such as transitioning from a supine position to a sitting or wheelchair-style sitting position, problems such as asynchronous movements and large deviations in folding angles can easily occur between the different bed sections. This not only affects the patient's comfort but also increases the difficulty of operation for nursing staff and may even lead to patient instability.

[0005] In terms of assisting with turning over, existing nursing beds mostly rely on manual methods or simple side-turning mechanisms. During manual turning, the labor intensity of caregivers is high, and it is difficult to accurately control the turning angle and force. Existing side-turning mechanisms mostly achieve turning assistance by lifting or tilting one side, which can easily cause the patient's body to slide laterally or concentrate local force during turning, causing a feeling of pressure and discomfort. This problem is more pronounced when the patient is heavy or has limited limb mobility, which is not conducive to the safe care of long-term bedridden patients.

[0006] To address patients' daily activities and psychological care needs, existing nursing beds are largely limited to in-bed care scenarios, failing to meet patients' needs for short-distance outings, communication with others, or sunbathing activities while in bed. If patients require outings, they typically still need to be transferred to a wheelchair, which involves complex posture adjustments, limited space, and a higher risk of falls, impacting patient safety and care efficiency.

[0007] Furthermore, existing nursing beds generally suffer from insufficient posture maintenance during multi-positional use. When the bed surface is adjusted to a specific angle or a wheelchair-like sitting position, its locking or support structure struggles to provide continuous and reliable positioning force, leading to angle rebound or structural wobbling during care or movement. Simultaneously, vibrations generated during posture changes or movements in some nursing beds cannot be effectively buffered, further reducing patient comfort.

[0008] In summary, existing nursing beds still have significant shortcomings in terms of integrated multi-mode switching, safety of turning assistance, adaptability for short-distance movement and communication outside, and structural stability. They are unable to meet the comprehensive nursing needs of long-term bedridden patients and critical care scenarios for safety, comfort, and multi-functional integration. Summary of the Invention

[0009] In view of the problems existing in the prior art, the purpose of the present invention is to provide a nursing bed that can smoothly switch between bed mode, wheelchair mode and bathtub mode, and has reliable posture locking, assisted turning over and bathing support capabilities, so as to solve the problems existing in the prior art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: A nursing bed includes a bed frame, a mattress on the bed frame, and a drive mechanism at the bottom of the bed frame; The bed frame includes a frame body, with a foot rail and a head rail at each end of the frame body, and guardrails on both sides of the frame body; The frame is provided with a first deformable frame, a second deformable frame, a third deformable frame and a fourth deformable frame that are rotatably connected to each other, starting from the end of the bed. Each deformable frame includes a first main frame and flip frames located at both ends of the first main frame, with a folding mechanism provided between the first main frame and the flip frames; A flipping mechanism is installed below the third deformation frame.

[0011] Furthermore, both the first main frame and the flipping frame are rotatably connected to rollers at equal intervals along their length. These rollers are used to support the mattress and reduce frictional resistance when the mattress moves.

[0012] Furthermore, the folding mechanism includes a second main frame, a first support plate disposed on the second main frame, a power shaft, and planetary gear sets disposed at both ends of the power shaft; the power shaft is connected to the sun gear in the planetary gear set; the folding frame is connected to the gear ring flange in the planetary gear set. A first motor is mounted on the first support plate. The output end of the first motor is connected to a double camshaft via a first linkage shaft. A rocker arm that rotatably cooperates with the double camshaft is mounted on the outer side of the first support plate.

[0013] Furthermore, the planetary gear set is provided with external teeth of the gear ring and external teeth of the planetary carrier. The double camshaft rotates under the drive of the first motor and presses the rocker arm, so that the rocker arm selectively engages with the external teeth of the gear ring or the external teeth of the planetary carrier, thereby realizing the switching between the flipping power of the flipping frame and the moving power of the mattress.

[0014] Furthermore, one end of the power shaft is provided with a belt reel and an electromagnetic clutch. The belt reel is provided with a belt, which is located below the mattress and is detachably connected to the mattress. Both ends of the pull belt reel are equipped with coil springs to keep the pull belt taut at all times, so that the mattress can assist the patient in turning over.

[0015] Furthermore, the frame is provided with bevel gear couplings between adjacent deformable frames, and each end of the bevel gear coupling is provided with a bridge gear, and a spur gear is coaxially provided on the bridge gear. Each deformable frame is equipped with a pawl locking mechanism at its bottom, which includes a first locking motor, a second pull rod, and a locking arm.

[0016] Furthermore, the first locking motor drives the locking arm to selectively engage or disengage with the spur gear via the second pull rod, so as to realize the linkage transmission or cut-off of power between adjacent deformable frames, and to lock the deformable frame after the form switching is completed.

[0017] Furthermore, the bed end rail includes a guide tube, with a telescopic tube inserted into the bottom of the guide tube and a lifting outer tube sleeved on the top of the guide tube; A locking mechanism is provided between the two guide tubes. The locking mechanism includes a second locking motor, a third pull rod, and a guide post. The bottom of the telescopic tube is connected to a swing arm, one end of which is equipped with a wheel. The telescopic tube is equipped with a guide groove, and the bottom of the guide groove is equipped with a 90-degree reversing structure, which is used to realize the storage or unfolding of the swing arm when the nursing bed is transformed into a wheelchair. The headboard includes a bed leg support that is rotatably connected to the bed frame, an electric push rod connected to the bed leg support, a rotating swing arm at the bottom of the bed leg support, and a guide rod rotatably connected to the bed frame on one side of the bed leg support. A second guide post is provided on the guide rod, a second guide groove is provided at one end of the rotating swing arm, and a rear wheel is provided at the other end of the rotating swing arm.

[0018] Furthermore, the drive mechanism includes a battery rack, with shock absorbers, a drive wheel, and a second motor respectively arranged on both sides of the battery rack, and an auxiliary wheel arranged on one side of the drive wheel; The second motor outputs power through a gearbox, which contains a first shaft and a second shaft. The first shaft is connected to the drive wheel, and the second shaft is connected to a worm gear via a chain. The worm gear is connected to a turbine, which is connected to the power shaft.

[0019] Furthermore, the flipping mechanism includes a second support plate, a flipping motor is provided on the outer side of the second support plate, and a second chain is provided inside the second support plate; The second chain is connected to a roller frame and a defecation plate. The roller frame and the defecation plate are connected to the second chain via ear plates and are used to assist in defecation or cleaning during the care process.

[0020] Compared with the prior art, the beneficial effects of the present invention are: This invention, by setting a multi-segment, interconnected frame structure consisting of a first, second, third, and fourth transformable frame on the bed frame, enables the nursing bed to continuously switch between supine, sitting, wheelchair, and bathing / nursing positions. This structurally solves the problem of existing nursing beds having limited functions and requiring patients to frequently transfer between the nursing bed and wheelchairs or bath chairs, reducing safety risks during patient transfers and improving the continuity of nursing procedures.

[0021] This invention sets up a folding structure between each deformation frame, where the first main frame and the flipping frame cooperate. The power path is switched through the planetary gear set, double camshaft and rocker arm in the folding mechanism, so that each section of the bed surface can be folded synchronously or adjusted independently during the deformation process. This avoids the problems of asynchronous movement and large angle deviation that are common in existing multi-section nursing beds, and improves the stability and reliability of bed posture adjustment.

[0022] This invention arranges roller structures on the first main frame and the flipping frame, and uses a pull belt and pull belt retractor to drive the mattress laterally, so that the mattress can move smoothly relative to the bed frame during the turning care process. This allows the patient's turning action to be completed by the displacement of the mattress and the folding of the flipping frame. This solves the problems of existing nursing bed turning operations relying on manual labor, concentrated force, and easy discomfort to patients, and reduces the labor intensity of nursing staff.

[0023] This invention achieves selective switching between the folding power of the flipping frame and the moving power of the mattress by setting an electromagnetic clutch on the power shaft and cooperating with the external teeth of the planetary gear ring and the planetary carrier. This allows the same drive structure to take into account both the functions of bed deformation and turning assistance, solving the problems of the dispersed drive structure and complex system of existing nursing beds and improving the integration of the whole machine structure.

[0024] This invention sets up a bevel gear coupling between adjacent deformable frames and uses a pawl locking mechanism to control the power transmission, enabling each deformable frame to achieve linkage adjustment during angle adjustment and reliably lock after posture adjustment. This solves the problems of insufficient posture maintenance and easy structural rebound of existing nursing beds in sitting or wheelchair positions, and improves the stability of nursing beds during use.

[0025] This invention solves the contradiction between mobility and bed stability in existing nursing beds by setting a retractable walking support structure at the foot of the bed and using a guide groove to automatically retract and unfold the swing arms and wheels. This allows the nursing bed to have walking function in wheelchair mode and does not affect the integrity of the bed structure in bed mode. It improves the applicability of the nursing bed in short-distance movement and daily care scenarios.

[0026] This invention, by setting a flipping mechanism below the third deformation frame and installing a roller frame and a defecation board on the flipping mechanism, enables the nursing bed to complete defecation or cleaning nursing operations without transferring the patient. This solves the problems of insufficient functionality and complicated operation procedures of existing nursing beds in special nursing scenarios, improves nursing efficiency and enhances the patient's nursing experience.

[0027] This invention solves the problem of insufficient stability of existing mobile nursing beds during movement by incorporating a shock absorber in the drive mechanism and using a worm gear transmission structure to reduce power and increase torque. This makes the nursing bed run more smoothly during walking and deformation, reduces the impact of vibration on patient comfort, and solves the problem of insufficient stability of existing mobile nursing beds during movement. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention during the process of transforming into a wheelchair; Figure 3 This is a schematic diagram of the structure of the present invention when it is converted into a wheelchair; Figure 4 This is a schematic diagram of the structure of the present invention when it is transformed into a bathtub; Figure 5 This is a schematic diagram of the bed frame structure of the present invention; Figure 6 This is a schematic diagram of the frame structure of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the frame structure of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the folding mechanism of the present invention; Figure 9 This is a schematic diagram of the pulley retractor of the present invention; Figure 10 This is a schematic diagram of the pawl locking mechanism of the present invention. Figure 1 ; Figure 11 for Figure 10 Enlarged structural diagram at point A; Figure 12 This is a schematic diagram of the pawl locking mechanism of the present invention. Figure 2 ; Figure 13 This is a schematic diagram of the drive mechanism of the present invention; Figure 14 This is a schematic diagram of the flipping mechanism of the present invention. Figure 1 ; Figure 15 This is a schematic diagram of the flipping mechanism of the present invention. Figure 2 ; Figure 16 This is a schematic diagram of the structure of the bed end rail of the present invention; Figure 17 This is a schematic diagram of the telescopic tube of the present invention; Figure 18 This is a schematic diagram of the structure of the gearbox of the present invention. Figure 1 ; Figure 19 This is a schematic diagram of the structure of the gearbox of the present invention. Figure 2 ; Figure 20 This is a schematic diagram of the drive mechanism of the present invention; Figure 21 This is a schematic diagram of the structure of the bed leg support of the present invention; Figure 22 This is a schematic diagram of the structure of the invention when it is converted into a wheelchair. Figure 2 .

[0029] The attached diagram lists the components represented by each number as follows: 1. Bed frame; 11. Frame; 111. First Deformation Frame; 112. Second deformation frame; 113. Third Deformation Frame; 114. Fourth Deformation Frame; 101. First main frame; 102. Tilting frame; 103. Idler roller; 104. Folding mechanism; 1041. Second main frame; 1042. First support plate; 1043. First motor; 10431. First linkage shaft; 1044. Power shaft; 1045. Electromagnetic clutch; 1046. Planetary gear set; 10461. External gear of ring gear; 10462. External gear of planetary carrier; 1047. Rocker arm; 1048. Double camshaft; 1049. Belt reel; 10491. Coil spring; 10492. Pull belt; 115. Bevel gear coupling; 1152. Spur gear; 1153. Bridge gear; 1156. Racket locking mechanism; 11561. First locking motor; 11562. Second pull rod; 11563. Locking arm; 12. Guardrail; 13. Bed foot rail; 131. Guide tube; 132. Telescopic tube; 1321. Guide groove; 133. Swing arm; 1331. Wheel; 134. Lifting outer tube; 135. Locking mechanism; 1351. Second locking motor; 1352. Third pull rod; 1353. Guide column; 14. Bedside railing; 141. Bed leg support; 142. Rotary swing arm; 1421. Rear wheel; 1422. Second guide groove; 143. Guide rod; 1431. Second guide post; 144. Electric actuator; 2. Mattress; 3. Drive mechanism; 31. Battery rack; 32. Shock absorber; 33. Drive wheel; 34. Second motor; 341. Gearbox; 3411. First shaft; 3412. Second shaft; 35. Auxiliary wheel; 36. Chain; 37. Worm gear; 38. Turbine; 4. Tilting mechanism; 41. Second support plate; 42. Tilting motor; 43. Second chain; 44. Roller frame; 45. Drainage plate; 46. Ear plate. Detailed Implementation

[0030] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0031] See Figure 1-6 A nursing bed includes a bed frame 1, a mattress 2 laid on the bed frame 1, and a drive mechanism 3 provided at the bottom of the bed frame 1; In the process of long-term bedridden care and care for disabled patients, existing nursing beds generally have problems such as limited function, discontinuous form switching, and the need to frequently transfer patients for nursing operations; The bed frame 1 serves as the load-bearing foundation for the entire bed, providing overall support for the mattress 2, the patient, and all functional components. Mattress 2 is used to provide body support for patients in supine, sitting, and nursing positions; The drive mechanism 3 is used to provide power output for the movement, deformation and linkage adjustment of the nursing bed, so as to solve the problem that the existing nursing bed relies on manual operation and has a high nursing intensity.

[0032] The bed frame 1 includes a frame body 11, with a foot rail 13 and a head rail 14 at each end of the frame body 11, and guardrails 12 on both sides of the frame body 11. In current nursing care procedures, patients are at risk of slipping or falling when changing positions or undergoing nursing procedures. The frame 11 serves as the mounting base for various deformable frames, drive components, and locking structures. The footboard 13 is used to provide a support and mobility structure installation location in wheelchair mode and nursing care status; The headrest 14 is used to limit and protect the patient's head area; The headboard 14 includes a bed leg support 141 rotatably connected to the bed frame 1, an electric push rod 144 connected to the bed leg support 141, a rotating swing arm 142 provided at the bottom of the bed leg support 141, and a guide rod 143 rotatably connected to the bed frame 1 on one side of the bed leg support 141. A second guide post 1431 is provided on the guide rod 143, a second guide groove 1422 is provided at one end of the rotating arm 142, and a rear wheel 1421 is provided at the other end of the rotating arm 142.

[0033] The electric actuator 144 pulls the bed leg support 141. As the bed leg support 141 is pulled, the angle between the bed leg support 141 and the bed frame 1 changes. When the angle between the two decreases, the rotating arm 142 will be retracted with the cooperation of the second guide post 1431 and the second guide groove 1422. Conversely, when the angle between the two increases, the rotating arm 142 will be extended.

[0034] The guardrail 12 is used to protect the patient's body during the turning, deformation and movement of the nursing bed, and to reduce nursing risks.

[0035] The frame 11 is provided with a first deformable frame 111, a second deformable frame 112, a third deformable frame 113 and a fourth deformable frame 114 that are rotatably connected to each other, starting from the foot of the bed. To address the issue that existing nursing beds cannot easily switch between supine, sitting, and wheelchair positions within the same device; The first deformable frame 111, the second deformable frame 112, the third deformable frame 113 and the fourth deformable frame 114 form a multi-section bed frame structure that can be linked together by a rotating connection. Each deformable frame is used to achieve multi-angle folding and unfolding under the action of the drive mechanism 3 and the linkage mechanism, thereby realizing continuous switching of multiple modes of the nursing bed.

[0036] Each deformable frame includes a first main frame 101 and a flipping frame 102 disposed at both ends of the first main frame 101. A folding mechanism 104 is provided between the first main frame 101 and the flipping frame 102. In existing nursing beds, multiple bed sections often use independent drive structures, which leads to problems with asynchronous movements. The first main frame 101 is used to support the main weight of the mattress 2; The flipping frame 102 is used to change its angle relative to the first main frame 101 under the action of the folding mechanism 104; The folding mechanism 104 is used to realize the controlled folding action between the first main frame 101 and the flipping frame 102, thereby ensuring the synchronization and stability of the bed surface deformation.

[0037] A flipping mechanism 4 is provided below the third deformation frame 113; Addressing the issue of insufficient functionality of nursing beds during patient defecation, cleaning, and special care processes; The flipping mechanism 4 is located below the third deformable frame 113 and is used to provide a defecation or cleaning assistance structure during the nursing process, so that nursing operations can be completed directly on the nursing bed.

[0038] See Figure 7 Both the first main frame 101 and the flipping frame 102 are rotatably connected with rollers 103 at equal intervals along their length direction. The rollers 103 are used to support the mattress 2 and reduce the frictional resistance when the mattress 2 moves. During the process of turning over and moving the mattress, excessive friction between the mattress 2 and the bed frame can easily cause difficulties in the nursing operation. The idler roller 103 is mounted on the first main frame 101 and the tilting frame 102 via a rotatable connection. The roller 103 is used to provide rolling support during the movement of the mattress 2, thereby reducing frictional resistance and improving the smoothness of the movement of the mattress 2.

[0039] See Figure 7-8 The folding mechanism 104 includes a second main frame 1041, a first support plate 1042 disposed on the second main frame 1041, a power shaft 1044, and planetary gear sets 1046 disposed at both ends of the power shaft 1044; the power shaft 1044 is connected to the sun gear in the planetary gear set 1046; the folding frame 102 is connected to the gear ring flange in the planetary gear set 1046. Addressing the issue of complex power distribution during the folding process of multi-section bed frames; The second main frame 1041 is used to install and support the folding mechanism 104 as a whole; The first support plate 1042 is used to support the power shaft 1044 and the drive components; The power shaft 1044 is used as the main shaft for power transmission; The planetary gear set 1046 is used to realize power distribution and transmission path switching.

[0040] A first motor 1043 is provided on the first support plate 1042. The output end of the first motor 1043 is connected to a double camshaft 1048 through a first linkage shaft 10431. A rocker arm 1047 that cooperates with the double camshaft 1048 is rotatably provided on the outer side of the first support plate 1042. The first motor 1043 is used to provide the initial driving force for the folding mechanism 104; The first linkage shaft 10431 is used to transmit the power of the first motor 1043 to the double camshaft 1048; The dual camshaft 1048 is used to apply periodic pressure to the rocker arm 1047 during rotation; The rocker arm 1047 is used to select the power path under the action of the double camshaft 1048.

[0041] See Figure 7-8 The planetary gear set 1046 is provided with a gear ring external tooth 10461 and a planetary carrier external tooth 10462. The double camshaft 1048 rotates under the drive of the first motor 1043 and presses the rocker arm 1047, so that the rocker arm 1047 selectively engages with the gear ring external tooth 10461 or the planetary carrier external tooth 10462, thereby realizing the switching between the folding power of the flipping frame 102 and the moving power of the mattress 2. The above structural design solves the problem of independent folding and turning functions in existing nursing beds; The external gear 10461 of the gear ring is used to correspond to the moving power output path of the mattress 2; The planetary carrier external gear 10462 is used to correspond to the folding power output path of the flipping frame 102; The rocker arm 1047 achieves power function switching by engaging different tooth structures.

[0042] See Figure 7-9 One end of the power shaft 1044 is provided with a pull belt 10492 retractor 1049 and an electromagnetic clutch 1045. The pull belt 10492 is provided on the pull belt 10492 retractor 1049. The pull belt 10492 is located under the mattress 2 and is detachably connected to the mattress 2. During the turning and care process, turning the patient directly to their side can easily cause physical discomfort; The pull strap 10492 is used to apply lateral pulling force to the mattress 2; The electromagnetic clutch 1045 is used to control the synchronization or discontinuation state of the pulley 1049 of the belt 10492 and the drive shaft 1044; The lateral movement of mattress 2 facilitates turning over.

[0043] Both ends of the pull strap 10492 and the retractor 1049 are equipped with coil springs 10491 to keep the pull strap 10492 taut at all times, so as to enable the mattress 2 to assist the patient in turning over. The tension and reset of the pull belt 10492 are ensured by the coil spring 10491 when it is not in operation.

[0044] See Figure 10-11 The frame 11 is provided with a bevel gear coupling 115 between adjacent deformable frames. The two ends of the bevel gear coupling 115 are respectively provided with a bridge gear 1153, and a spur gear 1152 is coaxially provided on the bridge gear 1153. To address the issue of insufficient angle synchronization during the coordinated adjustment of multiple deformable frames; The bevel gear coupling 115 is used to realize the power transmission between different deformable frames; The bridge gear 1153 and the spur gear 1152 are used to realize power transition and angle transmission.

[0045] Each deformable frame is provided with a pawl locking mechanism 1156 below it. The pawl locking mechanism 1156 includes a first locking motor 11561, a second pull rod 11562 and a locking arm 11563. The pawl locking mechanism 1156 is used to lock the structure after the angle of the deformable frame has been adjusted; The first locking motor 11561 is used to provide locking driving force; The second pull rod 11562 is used to transmit driving force; The locking arm 11563 is used to achieve gear engagement and disengagement.

[0046] See Figure 10-11 The first locking motor 11561 drives the locking arm 11563 to selectively engage or disengage with the spur gear 1152 through the second pull rod 11562, so as to realize the linkage transmission or cut-off of power between adjacent deformation frames, and to lock the deformation frame after the form switching is completed. The above structure solves the problem of unstable posture of the nursing bed.

[0047] See Figure 16-17 The bed foot rail 13 includes a guide tube 131, a telescopic tube 132 is inserted into the bottom of the guide tube 131, and a lifting outer tube 134 is sleeved on the top of the guide tube 131. Addressing the issue of difficulty in folding and storing the walking mechanism in the wheelchair-shaped configuration of nursing beds; Guide tube 131 is used to provide guidance for telescopic tube 132; The lifting outer tube 134 is used to protect and support the guide tube 131.

[0048] A locking mechanism 135 is provided between the two guide tubes 131. The locking mechanism 135 includes a second locking motor 1351, a third pull rod 1352, and a guide post 1353. The second locking motor 1351 is used to drive the locking mechanism 135; The third lever 1352 is used to transmit locking power; The guide post 1353 is used in conjunction with the telescopic tube 132 to achieve position locking.

[0049] The bottom of the telescopic tube 132 is connected to a swing arm 133. One end of the swing arm 133 is provided with a wheel 1331. The telescopic tube 132 is provided with a guide groove 1321. The bottom of the guide groove 1321 is provided with a 90-degree reversing structure, which is used to realize the storage or unfolding of the swing arm 133 when the nursing bed is transformed into a wheelchair. The swing arm 133 can be automatically rotated and stored by the deflection structure of the guide groove 1321.

[0050] See Figure 1-19 The drive mechanism 3 includes a battery rack 31, with a shock absorber 32, a drive wheel 33 and a second motor 34 respectively arranged on both sides of the battery rack 31, and an auxiliary wheel 35 arranged on one side of the drive wheel 33. Battery rack 31 is used to install the power supply unit; Shock absorber 32 is used to reduce vibration during walking; Drive wheel 33 and auxiliary wheel 35 are used to support the movement of the nursing bed; The second motor 34 is used to provide power for walking and deformation.

[0051] The second motor 34 outputs power through the gearbox 341. The gearbox 341 is equipped with a first shaft 3411 and a second shaft 3412. The first shaft 3411 is connected to the drive wheel 33. The second shaft 3412 is connected to the worm gear 37 through the chain 36. The worm gear 37 is connected to the turbine 38. The turbine 38 is connected to the power shaft 1044. Power distribution is achieved through gearbox 341; Speed ​​reduction and torque increase are achieved through worm gear 37 and turbine gear 38.

[0052] See Figure 13-22 The flipping mechanism 4 includes a second support plate 41, a flipping motor 42 is provided on the outer side of the second support plate 41, and a second chain 4336 is provided inside the second support plate 41. The flip motor 42 is used to provide the flipping power; The second chain 4336 is used to transmit the power for flipping.

[0053] The second chain 4336 is connected to a roller frame 44 and a defecation plate 45. The roller frame 44 and the defecation plate 45 are connected to the second chain 4336 through ear plates 46, which are used to assist in defecation or cleaning during the nursing process.

[0054] The working principle of this invention is as follows: The nursing bed of the present invention uses the bed frame 1 as the overall support base, and achieves continuous switching between bed mode, wheelchair mode and nursing mode through the coordinated cooperation of the multi-segment deformable frame 11 and the centralized drive structure.

[0055] The nursing bed includes a bed frame 1, a mattress 2 laid on the bed frame 1, and a drive mechanism 3 at the bottom of the bed frame 1. The bed frame 1 includes a frame body 11, with a foot rail 13 and a head rail 14 at each end of the frame body 11, and guardrails 12 on both sides of the frame body 11 for protective restraint of the patient during the operation and posture changes of the nursing bed. Starting from the foot of the bed, the frame body 11 is sequentially equipped with a first deformable frame 111, a second deformable frame 112, a third deformable frame 113, and a fourth deformable frame 114. The deformable frames are connected by rotation to form a multi-segment deformable structure, providing a structural basis for different usage modes.

[0056] Each deformation frame consists of a first main frame 101 and flip frames 102 located at both ends of the first main frame 101. A folding mechanism 104 is provided between the first main frame 101 and the flip frames 102. Rollers 103 are rotatably mounted at equal intervals along the length direction on the first main frame 101 and the flip frames 102. The rollers 103 provide rolling support for the mattress 2, reducing frictional resistance during lateral movement or deformation of the mattress 2 and ensuring the smoothness of the mattress 2's movement.

[0057] The folding mechanism 104 includes a second main frame 1041, a first support plate 1042, a power shaft 1044, and planetary gear sets 1046 disposed at both ends of the power shaft 1044. A first motor 1043 is disposed on the first support plate 1042. The first motor 1043 drives the double camshaft 1048 to rotate through the first linkage shaft 10431. During rotation, the double camshaft 1048 periodically presses against the rocker arm 1047, causing the rocker arm 1047 to selectively engage with the external gear 10461 of the ring gear or the external gear 10462 of the planetary carrier in the planetary gear set 1046, thereby realizing the switching of the power transmission path.

[0058] When the rocker arm 1047 is locked with the external gear 10462 of the planetary frame, the power is transmitted to the flipping frame 102 through the planetary gear set 1046, causing the flipping frame 102 to change angle relative to the first main frame 101, thereby realizing the flipping action of the deformable frame; when the rocker arm 1047 is locked with the external gear 10461 of the gear ring and the electromagnetic clutch 1045 is engaged, the power shaft 1044 drives the pull belt 10492 pull wheel 1049 to rotate, and the pull belt 10492 applies a lateral pulling force to the mattress 2, causing the mattress 2 to shift relative to the bed frame 1, which is used to assist the patient in turning over for nursing.

[0059] During the turning care process, the mattress 2 moves to one side of the bed under the action of the pull strap 10492, so that the patient moves synchronously with the mattress 2 to the top of the flip frame 102. Then the flip frame 102 flips upward, helping the patient to complete the turning action. After the turning is completed, the flip frame 102 returns to its original position, and the mattress 2 returns to its initial position under the reverse movement of the pull strap 10492, thus completing one turning care process.

[0060] A bevel gear coupling 115 is installed between adjacent deformation frames. A bridge gear 1153 and a spur gear 1152 are respectively installed at both ends of the bevel gear coupling 115. A pawl locking mechanism 1156 is installed below each deformation frame. The pawl locking mechanism 1156, through the cooperation of a locking motor, a pull rod, and a locking arm 11563, allows the locking arm 11563 to selectively engage or disengage with the spur gear 1152, thereby controlling the linkage transmission or disconnection of power between adjacent deformation frames and realizing synchronous angle adjustment and attitude locking of multiple deformation frames.

[0061] When the nursing bed transforms into a wheelchair, each transformation frame folds at a predetermined angle, forming a structure suitable for the patient's sitting posture. The footboard 13 is equipped with a retractable walking support structure. The telescopic tube 132 is inserted into the guide tube 131 under the control of the locking mechanism 135, and drives the swing arm 133 to rotate through the reversing structure of the guide groove 1321, so that the wheels 1331 can be automatically retracted or extended, thereby providing walking support in wheelchair mode.

[0062] The drive mechanism 3 includes a battery frame 31, a shock absorber 32, a drive wheel 33, an auxiliary wheel 35, and a second motor 34. The second motor 34 outputs power through a gearbox 341. One path drives the drive wheel 33 through the first shaft 3411 to move the nursing bed. The other path provides power to the power shaft 1044 through the second shaft 3412, chain 36, worm gear 37, and turbine 38 for folding and deformation adjustment of the bed frame 1. The worm gear 37 and turbine 38 work together to reduce speed and increase torque, improving operational stability.

[0063] A flipping mechanism 4 is installed below the third deformation frame 113. The flipping mechanism 4 includes a second support plate 41, a flipping motor 42, and a second chain 4336. The second chain 4336 is connected to the roller frame 44 and the defecation plate 45. The flipping motor 42 drives the second chain 4336 to switch the roller frame 44 and the defecation plate 45 between different positions to assist in defecation or cleaning during the care process.

[0064] How the bathtub shape works: When caregivers need to perform sponge baths, washes, or water care for disabled or immobile patients, all the flip frames 102 fold upwards, transforming the frame 11 into a basin-like groove structure; then the waterproof cloth is laid in the basin-like groove and fixed with the hanging rods installed on the foot rail 13 and head rail 14 of the bed to facilitate the bathing operation for the patient. When it is necessary to turn the patient over: First, the mattress 2 located above it is moved to one side of the bed by the pull strap 10492. When the mattress 2 moves, it will move the patient in sync. When the patient moves to the top of the flip frame 102, the movement of the mattress 2 is stopped. Then, by adjusting the angle of the flip frame 102, the flip frame 102 is folded upwards, thereby enabling the patient above the flip frame 102 to turn over. When patients turn over, caregivers should be present to assist them to prevent excessive turning. After the rolling is completed, the flip frame 102 returns to the horizontal position, and the pull strap 10492 moves the mattress 2 in the opposite direction to return the mattress 2 to its original position. When placing the waterproof drape, first have the patient turn to one side, then place the drape under the patient, and then have the patient turn to the other side. After turning over, the patient will be lying directly on top of the drape. Then, fix the four sides of the drape to the hanging pole.

[0065] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A nursing bed, characterized in that: Includes a bed frame (1), a mattress (2) is laid on the bed frame (1), and a drive mechanism (3) is provided at the bottom of the bed frame (1). The bed frame (1) includes a frame (11), with a foot rail (13) and a head rail (14) at both ends of the frame (11), and guardrails (12) on both sides of the frame (11). The frame (11) is provided with a first deformable frame (111), a second deformable frame (112), a third deformable frame (113) and a fourth deformable frame (114) that are rotatably connected to each other, starting from the end of the bed. Each deformable frame includes a first main frame (101) and a flipping frame (102) disposed at both ends of the first main frame (101). A folding mechanism (104) is provided between the first main frame (101) and the flipping frame (102). A flipping mechanism (4) is provided below the third deformation frame (113).

2. The nursing bed according to claim 1, characterized in that: Both the first main frame (101) and the flip frame (102) are rotatably connected with rollers (103) at equal intervals along their length direction. The rollers (103) are used to support the mattress (2) and reduce the frictional resistance when the mattress (2) moves.

3. The nursing bed according to claim 1, characterized in that: The folding mechanism (104) includes a second main frame (1041), a first support plate (1042) disposed on the second main frame (1041), a power shaft (1044), and planetary gear sets (1046) disposed at both ends of the power shaft (1044); the power shaft (1044) is connected to the sun gear in the planetary gear set (1046); the folding frame (102) is connected to the gear ring flange in the planetary gear set (1046); A first motor (1043) is provided on the first support plate (1042). The output end of the first motor (1043) is connected to a double camshaft (1048) through a first linkage shaft (10431). A rocker arm (1047) that cooperates with the double camshaft (1048) is rotatably provided on the outer side of the first support plate (1042).

4. A nursing bed according to claim 3, characterized in that: The planetary gear set (1046) is provided with a gear ring external tooth (10461) and a planetary carrier external tooth (10462). The double camshaft (1048) rotates under the drive of the first motor (1043) and presses the rocker arm (1047), so that the rocker arm (1047) selectively engages with the gear ring external tooth (10461) or the planetary carrier external tooth (10462), thereby realizing the switching between the folding power of the flipping frame (102) and the moving power of the mattress (2).

5. A nursing bed according to claim 3 or 4, characterized in that: One end of the power shaft (1044) is provided with a belt reel (1049) and an electromagnetic clutch (1045). A belt (10492) is provided on the belt reel (1049). The belt (10492) is located below the mattress (2) and is detachably connected to the mattress (2). Both ends of the pull belt retractor (1049) are equipped with coil springs (10491) to keep the pull belt (10492) taut at all times, so as to enable the mattress (2) to assist the patient in turning over.

6. A nursing bed according to claim 1, characterized in that: The frame (11) is provided with a bevel gear coupling (115) between adjacent deformable frames. The two ends of the bevel gear coupling (115) are respectively provided with a bridge gear (1153), and a spur gear (1152) is coaxially provided on the bridge gear (1153). Each deformable frame is provided with a pawl locking mechanism (1156) below it. The pawl locking mechanism (1156) includes a first locking motor (11561), a second pull rod (11562), and a locking arm (11563).

7. A nursing bed according to claim 6, characterized in that: The first locking motor (11561) drives the locking arm (11563) to selectively engage or disengage with the spur gear (1152) via the second pull rod (11562) to realize the linkage transmission or cut-off of power between adjacent deformable frames, and to lock the deformable frame after the form switching is completed.

8. A nursing bed according to claim 1, characterized in that: The bed end rail (13) includes a guide tube (131), a telescopic tube (132) is inserted into the bottom of the guide tube (131), and a lifting outer tube (134) is sleeved on the top of the guide tube (131). A locking mechanism (135) is provided between the two guide tubes (131). The locking mechanism (135) includes a second locking motor (1351), a third pull rod (1352), and a guide post (1353). The bottom of the telescopic tube (132) is connected to a swing arm (133), one end of the swing arm (133) is provided with a wheel (1331), the telescopic tube (132) is provided with a guide groove (1321), and the bottom of the guide groove (1321) is provided with a 90-degree turning structure, which is used to realize the storage or unfolding of the swing arm (133) when the nursing bed is transformed into a wheelchair. The headboard (14) includes a leg support (141) rotatably connected to the bed frame (1), an electric push rod (144) connected to the leg support (141), a rotating swing arm (142) provided at the bottom of the leg support (141), and a guide rod (143) rotatably connected to one side of the leg support (141) on the bed frame (1). A second guide post (1431) is provided on the guide rod (143), a second guide groove (1422) is provided at one end of the rotating arm (142), and a rear wheel (1421) is provided at the other end of the rotating arm (142).

9. A nursing bed according to claim 1, characterized in that: The drive mechanism (3) includes a battery rack (31), a shock absorber (32), a drive wheel (33) and a second motor (34) are respectively provided on both sides of the battery rack (31), and an auxiliary wheel (35) is provided on one side of the drive wheel (33). The second motor (34) outputs power through the gearbox (341). The gearbox (341) is equipped with a first shaft (3411) and a second shaft (3412). The first shaft (3411) is connected to the drive wheel (33). The second shaft (3412) is connected to the worm (37) through the chain (36). The worm (37) is connected to the turbine (38). The turbine (38) is connected to the power shaft (1044).

10. A nursing bed according to claim 1, characterized in that: The flipping mechanism (4) includes a second support plate (41), a flipping motor (42) is provided on the outer side of the second support plate (41), and a second chain (43) is provided inside the second support plate (41). The second chain (43) is connected to a roller frame (44) and a defecation plate (45). The roller frame (44) and the defecation plate (45) are connected to the second chain (43) through ear plates (46) for assisting in defecation or cleaning during the nursing process.

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