A multifunctional posture changing nursing bed device

Abstract

The present invention discloses a multifunctional posture-changing nursing bed device, which specifically includes: a lifting support component, a bed board system driving bracket body, a side panel driving assembly, a main bed surface driving assembly, a main bed surface assembly, a first rotating retractable side panel assembly, a second rotating retractable side panel assembly, an air cushion assembly, and an electrically controlled air pump. The present invention solves the problems of existing nursing beds, such as poor comfort, poor safety, large size, and inability to achieve true rollover. Therefore, the application of the present invention can make the nursing work of the elderly and the disabled easier, more convenient, and more efficient, and can provide the market with a nursing device that is comfortable, safe, compact, and more suitable for use in places such as homes and nursing homes.

Description

Technical Field

[0001] The present invention relates to the field of nursing medical equipment, and more specifically to a multifunctional posture-changing nursing bed device. Background Art

[0002] For the elderly who have difficulty in moving, posture change has become a more prominent problem. In home life, caregivers need to help the elderly to turn over and stand up before caring for them. Therefore, a multifunctional, small-volume, and flexible posture change nursing bed device is urgently needed to reduce the burden of medical care.

[0003] The functional requirements of posture changing devices can be summarized as "back raising", "side flipping" and "leg bending". In addition, the functions of "preventing bedsores" and "facilitating urination and defecation" can be added. At present, the relevant nursing medical devices on the market have become mature in the realization of these functions. Most products can realize most functions, and some products have added functions such as washing hair and washing feet. However, these devices have little effect after entering the market and have not well solved the needs of the elderly disabled care market. The reasons are as follows:

[0004] First, most products are made of multiple bed boards, which directly leads to a large size of the equipment, making it difficult to install it at home or in the examination room.

[0005] Secondly, there are hinges between the bed boards of existing products, and the bed boards can be flipped relative to each other. The above functions are achieved by controlling the flipping of the bed boards. Specific implementation schemes include patents 206198192U and 101632615B. However, there is a certain thickness between the center of the turning corner of the bed board and the human body joints, which leads to the inevitable friction between the back or buttocks of the person and the bed board when realizing functions such as raising the back and bending the legs, resulting in poor comfort. In addition, the gap at the hinge is easy to cause compression trauma to the user on the bed.

[0006] Third, existing products achieve their intended functions through various linkage mechanisms. The number of power components in the system is large, which increases the design and manufacturing costs of the device, and the selling price is high, which reduces the purchasing desire of demand users;

[0007] Finally, most devices cannot achieve true rollover. This is mainly because, when rolling over, the bed board is actually used to squeeze the user sideways to achieve the rollover. The user on the bed cannot achieve the rollover due to slippage and improper positioning.

[0008] Therefore, how to effectively overcome the above-mentioned defects in the prior art and propose a multifunctional posture-changing nursing bed device has become a difficult problem that the technicians in this field need to focus on. Summary of the invention

[0009] To this end, the purpose of the present invention is to provide a multifunctional posture changing nursing bed device, and its specific technical solution is as follows:

[0010] A multifunctional posture-changing nursing bed device, comprising: a lifting support component, a bed board system driving bracket component, a main bed surface component, a rotating retractable side plate component, an air cushion group, and an electrically controlled air pump; wherein the horizontal direction when a human body lies normally is the X direction, the vertical horizontal direction perpendicular to the X direction is the Y direction, and the vertical vertical direction perpendicular to the X direction is the Z direction;

[0011] The lifting support component is used to realize the lifting and lowering control of the entire nursing bed body along the Z direction;

[0012] The bed board driving bracket component comprises a bed board driving bracket body with a left-right central symmetry in appearance and internal structure, and driving components respectively installed inside the two side ends of the bed board driving bracket body along the X direction, the driving components comprising a side plate driving component and a main bed surface driving component; the bed board driving bracket component is installed above the lifting support component;

[0013] The main bed surface assembly and the rotating retractable side plate assembly are installed above the bed board system driving bracket body; the rotating retractable side plate assembly includes a first rotating retractable side plate assembly and a second rotating retractable side plate assembly which are respectively arranged on both sides of the main bed surface assembly in the Y direction; the end of the main bed surface assembly and the ends of the first rotating retractable side plate assembly and the second rotating retractable side plate assembly are coaxially rotatably installed in the side end of the bed board system driving bracket body; the main bed surface driving assembly can drive the main bed surface assembly to rotate clockwise or counterclockwise with the X direction as the axis; the side plate driving assembly includes a first side plate driving assembly and a second side plate driving assembly which are respectively arranged inside the two side ends of the bed board system driving bracket body, and the first side plate driving assembly and the second side plate driving assembly can respectively drive the first rotating retractable side plate assembly and the second rotating retractable side plate assembly to rotate clockwise or counterclockwise with the X direction as the axis;

[0014] An air cushion group, the air cushion group is fixed above the main bed surface assembly to support a human body;

[0015] An electrically controlled air pump is installed inside the lifting support component for inflating.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are:

[0017] The design concept of the present invention is different from that of the existing side-flip nursing beds. The existing nursing beds with side-flip function rely on the side-flip bed board to squeeze the user's body and force the user to flip sideways, while the present invention directly stands the entire bed sideways, and the user himself is not squeezed. Figuratively speaking, it is the difference between a nurse pushing a patient to flip sideways with his hands and a nurse holding the patient to flip sideways. Therefore, theoretically, the user experience on the bed will be as comfortable as a baby in a cradle.

[0018] Compared with existing nursing beds, the present invention adopts the design concept of a cradle. The main bed surface assembly is matched with the first and second rotating retractable side panel assemblies, which can automatically swing periodically, changing the stress conditions of the left and right halves of the user's body on the bed, helping blood circulation throughout the body, and reducing the incidence of "bed-ridden diseases" such as bedsores. The elderly and disabled people in the bed have better comfort and a better sense of security, which helps to realize nursing automation.

[0019] The nursing bed side panels (first and second rotating retractable side panel components) of the present invention can be used for multiple purposes. They are protective baffles in daily use. When the bed body is flipped to one of the left and right sides, they can assist the user on the bed to flip sideways, making it convenient for family members and nursing staff to care for the patient. The side panels of the present invention can also be retracted under the bed body to facilitate the transfer of the elderly on the bed. The side panels are completely retracted by electric power, which is simple and labor-saving.

[0020] The lifting function cooperates with the rollover function of the present invention at the same time, thereby reducing the centrifugal effect and weightlessness (from rollover to lying flat) and overweight (from lying flat to rollover) felt by the user, maintaining the center of gravity height of the user on the bed unchanged, and improving comfort.

[0021] The present invention has a compact drive, and the main bed surface drive assembly and the side panel drive assembly are hidden in the headboards on both sides. Compared with traditional nursing beds, the side bed boards are removed, and the retractable design of the rotating retractable side panel assembly reduces the volume of the entire nursing bed, making it convenient for use in homes, nursing homes and other places.

[0022] On the basis of the above technical solution, the present invention can also make the following improvements:

[0023] Preferably, the lifting support component includes a base and a lifting column, the lifting column is fixedly connected above the base, the bed board driving bracket component is installed above the lifting column, and the lifting column is lifted and lowered in the Z direction under electric control.

[0024] Preferably, the first side plate drive assembly and the second side plate drive assembly have the same structure, and both include: a worm drive kit, a worm wheel, a high-speed shaft, a secondary first gear, a secondary second combined gear, a secondary shaft, an idler wheel, and an idler wheel shaft; wherein, the worm drive kit is installed in a worm cavity in the side end of the bed board system drive bracket body, and the worm wheel is meshed with the worm in the worm drive kit; the high-speed shaft is a rotating shaft, and the worm wheel is installed on the worm wheel shaft section of the high-speed shaft and rotates synchronously with the high-speed shaft; the secondary first gear is installed on the spur gear shaft section of the high-speed shaft and is also rotated with the The high-speed shaft rotates synchronously; the secondary second combined gear is meshed with the secondary first gear, the secondary second combined gear is installed on the secondary shaft, the secondary shaft is a spindle, the secondary second combined gear and the secondary shaft can rotate relative to each other, the secondary shaft and the bed board system driving bracket body are fixed and do not rotate relative to each other; the idler wheel is meshed with the secondary second combined gear, the idler wheel is installed on the idler wheel shaft, the idler wheel shaft is a spindle, the idler wheel shaft and the bed board system driving bracket body are fixed and do not rotate relative to each other; the idler wheel shaft and the idler wheel can rotate relative to each other;

[0025] The first rotary retractable side plate assembly and the second rotary retractable side plate assembly have the same structure but opposite installation directions, and both include: a side plate body, a hollow gear shaft, and a hanging ring; the hollow gear shaft is fixedly connected to the outer side surface of one side of the side plate body, the hanging ring is arranged on the other side of the side plate body, the hollow gear shaft is coaxial with the opening on the hanging ring; the gear ring of the hollow gear shaft is meshed with the idler wheel, and the hanging ring is sleeved in the other end of the bed board system driving bracket body away from the idler wheel;

[0026] The first rotating retractable side plate assembly is controlled by the worm drive kit located on one side of the bed board system driving bracket body through the above-mentioned transmission chain, and rotates around the axis of its hollow gear shaft; the second rotating retractable side plate assembly is controlled by the worm drive kit located on the other side of the bed board system driving bracket body through the above-mentioned transmission chain, and rotates around the axis of its hollow gear shaft.

[0027] Preferably, the main bed surface driving assembly comprises a cam plate, a push rod, an electric push rod, and a limit bolt at the fixed end of the electric push rod; the main bed surface assembly rotates coaxially with the first rotating retractable side plate assembly and the second rotating retractable side plate assembly; a hollow internal spline shaft is respectively provided on the outer sides of both ends of the main bed surface assembly along the X direction, the spline shaft on the cam plate is installed in the spline hole of the hollow internal spline shaft and the two cannot rotate relative to each other; one end of the push rod is connected to the cam plate, and the other end is connected to the electric push rod; the push rod is installed in a slideway in the side end of the bed board system driving bracket body and can only move up and down; the other end of the electric push rod away from the push rod is hinged to the bed board system driving bracket body through the limit bolt at the fixed end of the electric push rod;

[0028] The electric push rod drives the push rod to move up and down, thereby pushing the cam plate to rotate, and then controlling the rotation of the main bed surface assembly.

[0029] Preferably, the structure of the first rotating retractable side panel assembly and the second rotating retractable side panel assembly also includes a side panel air cushion and a safety guardrail, the side panel air cushion is fixed to the inner surface of the side panel body by an air cushion fixing belt; the safety guardrail is a retractable pipe.

[0030] Preferably, the main bed surface assembly includes a main bed surface, an L-shaped member, a spring, and a side plate air cushion roller; the long end of the L-shaped member is a shaft, and the short end is a thick plate perpendicular to the axis of the long end shaft, and the short end is provided with an axial hole, the axial direction of the axial hole is parallel to the axis of the long end shaft of the L-shaped member; the L-shaped member is hinged to the L-shaped member fixed shafts at the four corners of the main bed surface through the short end axial hole, and the L-shaped member is restricted from moving in the direction of its short end axial hole, but rotation is not restricted; the spring is installed between the notch of the L-shaped member and the spring groove of the main bed surface, and the spring is in a full-length state when not in operation, and the side plate air cushion roller is installed on the long end shafts of two L-shaped members symmetrically arranged along the X direction of the main bed surface.

[0031] The above structure can help the side panel air cushion to exhaust when the rotary and retractable side panel assembly is turned under the main bed surface. The side panel air cushion pressure roller and the rotary and retractable side panel assembly work together to squeeze the side panel air cushion.

[0032] Preferably, the safety guardrail on the first rotating retractable side plate assembly is installed on the side end face of the side plate body where the hollow gear shaft is installed, and the safety guardrail on the second rotating retractable side plate assembly is installed on the side end face of the side plate body opposite to the side end face where the hollow gear shaft is installed. In this way, the symmetrical installation of the two safety guardrails on the nursing bed is ensured.

[0033] Preferably, the side panel air cushion is composed of a plurality of first airbags connected vertically, a first exhaust guide frame is fixed inside the first airbag at the joint of every two connected first airbags, all first exhaust guide frames are inclined to one side, a first airbag connecting port is provided on the first exhaust guide frame, and a fixing belt is also fixed to the overall outer ring of the side panel air cushion; inflation of the first airbag is achieved by the electric-controlled air pump, and exhaust of the first airbag is achieved by extrusion between the first rotating and retractable side panel assembly, the second rotating and retractable side panel assembly and the main bed surface assembly.

[0034] Preferably, the side panel body is a semi-I-shaped body, and the side surfaces of the side panel body are fan-shaped to prevent the side surfaces of the side panel body from interfering with another rotating and retracting side panel when a certain rotating and retracting side panel is working; the semi-I-shaped side panel body is an arc-shaped cross-section from its cross-section, and its inner surface corresponds to the side with a larger curvature of the arc-shaped cross-section. The purpose of setting the side panel body to be arc-shaped is to prevent interference with the main bed surface during the rotation of the side panel.

[0035] Preferably, the air cushion group is composed of an inflatable mattress, an inflatable pillow, and an inflatable back cushion, and the air inlet pipes of each component of the air cushion group are connected to the electronically controlled air pump; the inflatable mattress is also fixedly connected to a bent-leg inflatable cushion at the position corresponding to the knee joint when the human body is lying flat, and the bent-leg inflatable cushion is composed of a plurality of second air bags combined with each other, and the cross-section of a single second air bag is a small fan-shaped, and a plurality of second air bags are combined with the side surfaces of adjacent second air bags in sequence, and the combined second air bag side surfaces constitute the second exhaust guide skeleton of the entire bent-leg inflatable cushion, and each of the second exhaust guide skeletons is provided with a second air bag connecting port, and adjacent second air bag connecting ports are respectively staggered on the second exhaust guide skeleton, and an air inlet and exhaust port is provided at the tail of the second air bag side surface of the bottom layer; the bent-leg inflatable cushion is also surrounded by a fixed skirt edge bonded to the inflatable mattress.

[0036] In the present invention, the inflation and recovery of the corresponding inflatable cushion parts of the side plate air cushion and the air cushion group are completely realized by electric power, which is simple and labor-saving.

[0037] The present invention adopts a non-articulated bed surface design. The change of the bed surface shape is achieved by the change of the air cushion on the bed surface, which reduces the risk of the bed surface of the traditional nursing bed pinching the user when the user's lying position change function is implemented. While abandoning the articulated bed surface, it can also reduce the friction effect between the bed surface and the human skin when rotating around the hinge point. This design can not only reduce the complexity of the structure and thus reduce the cost, but also increase the reliability of the device and facilitate maintenance.

[0038] The present invention discloses a multifunctional posture-changing nursing bed device, which aims to address the problems of existing nursing beds in the technical background, such as poor comfort, poor safety, large size and inability to achieve true side rollover. The application of the present invention can make the nursing work of the elderly and the disabled easier, more convenient and more efficient, and can provide the market with a nursing device that is comfortable, safe, compact and more suitable for use in homes, nursing homes and other places. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0040] Figure 1 The accompanying drawing is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 The accompanying drawing is an explosion schematic diagram of the present invention;

[0042] Figure 3 The accompanying drawing is an exploded schematic diagram of the bed board driving bracket component of the present invention;

[0043] Figure 4 The accompanying drawing is a cross-sectional schematic diagram of the bed board system driving bracket component assembly of the present invention;

[0044] Figure 5 The accompanying drawing is a schematic diagram of the main bed surface assembly of the present invention;

[0045] Figure 6 The accompanying drawing is a schematic diagram of the first and second rotary retractable side plate assemblies of the present invention;

[0046] Figure 7 The accompanying drawing is a schematic cross-sectional view of the internal structure of the side plate air cushion of the present invention;

[0047] Figure 8 The accompanying drawing is a cross-sectional schematic diagram of the internal structure of the bent-leg inflatable cushion of the present invention;

[0048] Fig. 9 The accompanying drawing is a schematic diagram showing the rollover function of the present invention;

[0049] Fig.10 The accompanying drawing is a schematic diagram showing the back-lifting and leg-bending nursing functions of the present invention;

[0050] Description of reference numerals:

[0051] 1. Lifting support components,

[0052] 1.1, base, 1.2, lifting column;

[0053] 2. The bed board is a driving bracket component.

[0054] 2.1, the bed board is the driving bracket body, 2.1-1, the bed board is the driving bracket first shell, 2.1-2, the bed board is the driving bracket second shell,

[0055] 2.2, side plate drive assembly, 2.2-1, worm drive kit, 2.2-2, worm gear, 2.2-3, high-speed shaft, 2.2-4, second-stage first gear, 2.2-5, second-stage second combined gear, 2.2-6, second-stage shaft, 2.2-7, idler, 2.2-8, idler shaft, 2.2-9, first bearing end cover, 2.2-10, first rolling bearing, 2.2-11, first sleeve, 2.2-12, second sleeve, 2.2-13, second bearing end cover, 2.2-14, worm gear flat key, 2.2-15, second-stage first gear flat key, 2.2-16, shaft end retaining ring,

[0056] 2.3, main bed surface driving assembly, 2.3-1, cam plate, 2.3-2, push rod, 2.3-3, electric push rod, 2.3-4, limit bolt at the fixed end of the electric push rod, 2.3-5, connecting bolt sleeve at the movable end of the electric push rod, 2.3-6, third bearing end cover, 2.3-7, second rolling bearing, 2.3-8, third sleeve, 2.3-9, axial limit baffle, 2.3-10, limit screw;

[0057] 3. Main bed surface assembly,

[0058] 3.1, main bed surface, 3.2, L-shaped component, 3.3, spring, 3.4, side plate air cushion roller, 3.5, L-shaped component fixed axis;

[0059] 4. Rotating retractable side panel assembly,

[0060] 4.1, side panel body, 4.2, hollow gear shaft, 4.3, hanging ring, 4.4, side panel air cushion, 4.4-1, first air bag, 4.4-2, first exhaust guide frame, 4.4-3, first air bag connecting port, 4.4-4, fixing belt, 4.5, safety guardrail;

[0061] 5. Air cushion group,

[0062] 5.1, inflatable mattress, 5.2, inflatable pillow, 5.3, inflatable back cushion, 5.4, bent leg inflatable cushion, 5.4-1, second air bag, 5.4-2, second exhaust guide frame, 5.4-3, second air bag connecting port, 5.4-4, air inlet and exhaust port, 5.4-5, fixed skirt edge;

[0063] 6. Electronically controlled air pump. DETAILED DESCRIPTION

[0064] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0065] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 cannot be understood as a limitation on the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0069] According to the following Figure 1-10A multifunctional posture changing nursing bed device according to an embodiment of the present invention is described in detail.

[0070] like Figure 1 As shown, an embodiment of the present invention discloses a multifunctional posture-changing nursing bed device, comprising: a lifting support component 1, a bed board system driving bracket component 2, a main bed surface assembly 3, a rotating retractable side plate assembly 4, an air cushion group 5, and an electrically controlled air pump 6.

[0071] The electrically controlled air pump 6 is installed inside the lifting support component 1, including: an electrically controlled air distribution valve and an air pump, which are used to inflate the air cushions on the rotary retractable side plate assembly 4 and the air cushion group 5. The electrically controlled air pump 6 used in this embodiment is an existing device, so its structure will not be described in detail here.

[0072] In this embodiment, Figure 1-4 As shown, the horizontal direction of a human body lying normally is the X direction, the vertical direction perpendicular to the X direction is the Y direction, and the vertical direction perpendicular to the X direction is the Z direction.

[0073] The lifting support component 1 is used to realize the lifting control of the entire nursing bed body along the Z direction.

[0074] Specifically, Figure 2 As shown, the lifting support component 1 includes a base 1.1 and a lifting column 1.2. The lifting column 1.2 is fixedly connected to the top of the base 1.1 and arranged in two along the X direction. The bed board driving bracket component 2 is installed above the lifting column 1.2. The lifting column 1.2 is lifted and lowered in the Z direction under electric control. The lifting column 1.2 used in this embodiment can be purchased directly from the market, and the base 1.1 is a solid marble rectangular base.

[0075] like Figure 3 As shown, the bed board driving bracket component 2 includes a bed board driving bracket body 2.1 with left-right symmetric appearance and internal structure, and driving components respectively installed inside the two side ends of the bed board driving bracket body 2.1 along the X direction, and the driving components include a side panel driving component 2.2 and a main bed surface driving component 2.3.

[0076] Specifically, both side ends of the bed board driving bracket body 2.1 are provided with a first shell 2.1-1 of the bed board driving bracket and a second shell 2.1-2 of the bed board driving bracket for protection.

[0077] like Figure 1 , 2As shown in Figures 9 and 10, the main bed surface assembly 3 and the rotating retractable side panel assembly 4 are installed above the bed board system driving bracket body 2.1; the rotating retractable side panel assembly 4 includes a first rotating retractable side panel assembly and a second rotating retractable side panel assembly which are respectively arranged on both sides of the main bed surface assembly 3 in the Y direction; the end of the main bed surface assembly 3 and the ends of the first rotating retractable side panel assembly and the second rotating retractable side panel assembly are coaxially rotatably installed in the side end of the bed board system driving bracket body 2.1; the main bed surface driving assembly 2.3 can drive the main bed surface assembly 3 to rotate clockwise or counterclockwise with the X direction as the axis; the side panel driving assembly 2.2 includes a first side panel driving assembly and a second side panel driving assembly which are respectively arranged inside the two side ends of the bed board system driving bracket body 2.1, and the first side panel driving assembly and the second side panel driving assembly can respectively drive the first rotating retractable side panel assembly and the second rotating retractable side panel assembly to rotate clockwise or counterclockwise with the X direction as the axis.

[0078] Specifically, the first side plate drive assembly has the same structure as the second side plate drive assembly, and both include: a worm drive kit 2.2-1, a worm wheel 2.2-2, a high-speed shaft 2.2-3, a secondary first gear 2.2-4, a secondary second combined gear 2.2-5, a secondary shaft 2.2-6, an idler wheel 2.2-7, and an idler wheel shaft 2.2-8.

[0079] Since the internal structure of the bed board driving bracket component 2 and the parts installed thereon are symmetrical in the left and right directions, Figure 3 , 4 As shown, this implementation takes the structure on the left as an example for the following description:

[0080] The worm drive kit 2.2-1 is installed in the worm cavity in the side end of the bed board system drive bracket body 2.1, and the worm wheel 2.2-2 is meshed with the worm in the worm drive kit 2.2-1; the high-speed shaft 2.2-3 is a rotating shaft, and the worm wheel 2.2-2 is installed on the worm wheel shaft section of the high-speed shaft 2.2-3, and rotates synchronously with the high-speed shaft 2.2-3, wherein the synchronous rotation of the worm wheel 2.2-2 and the high-speed shaft 2.2-3 is ensured by a worm wheel flat key 2.2-14; the left side of the worm wheel 2.2-2 contacts with the inner ring of the first rolling bearing 2.2-10 on the left side of the high-speed shaft 2.2-3 through the first sleeve 2.2-11, and the outer ring of the first rolling bearing 2.2-10 on the left side of the high-speed shaft 2.2-3 contacts with the first bearing end cover 2.2-9 to ensure the axial positioning of the left side of the worm wheel 2.2-2, and the right side of the worm wheel 2.2-2 contacts with the shoulder of the high-speed shaft to ensure the axial positioning of the right side of the worm wheel 2.2-2.

[0081] The secondary first gear 2.2-4 is installed on the spur gear shaft section of the high-speed shaft 2.2-3, and also rotates synchronously with the high-speed shaft 2.2-3, wherein the synchronous rotation of the secondary first gear 2.2-4 and the high-speed shaft 2.2-3 is ensured by the secondary first gear flat key 2.2-15; the left side of the secondary first gear 2.2-4 is positioned by the high-speed shaft shoulder, and the right side of the secondary first gear 2.2-4 contacts with the inner ring of the first rolling bearing 2.2-10 on the right side of the high-speed shaft 2.2-3 through the second sleeve 2.2-12, and the outer ring of the first rolling bearing 2.2-10 on the right side of the high-speed shaft 2.2-3 contacts with the second bearing end cover 2.2-13, thereby ensuring the axial positioning of the right side of the secondary first gear 2.2-4.

[0082] The secondary second combined gear 2.2-5 meshes with the secondary first gear 2.2-4, and the secondary second combined gear 2.2-5 is installed on the secondary shaft 2.2-6, which is the central shaft. The secondary second combined gear 2.2-5 and the secondary shaft 2.2-6 are clearance-matched, and can realize relative rotation; the left side of the secondary second combined gear 2.2-5 contacts the secondary shaft shoulder to limit the axial displacement on the left side, and the right side of the secondary second combined gear 2.2-5 contacts the shaft end retaining ring 2.2-16 on the secondary shaft 2.2-6 to limit the axial displacement on the right side of the secondary second combined gear 2.2-5. The left positioning shaft section of the secondary shaft 2.2-6 is interference-fitted with the "secondary shaft hole" of the bed board system driving bracket body 2.1, so as to realize that the secondary shaft 2.2-6 and the bed board system driving bracket body 2.1 are fixed and do not rotate relative to each other.

[0083] The idler wheel 2.2-7 is meshed with the second-stage second combined gear 2.2-5. The idler wheel 2.2-7 is installed on the idler wheel shaft 2.2-8. The idler wheel shaft 2.2-8 is the central shaft. The idler wheel shaft 2.2-8 and the bed board system driving bracket body 2.1 are fixed and do not rotate relative to each other; the gear shaft section of the idler wheel shaft 2.2-8 and the central shaft hole of the idler wheel 2.2-7 are clearance-matched to achieve relative rotation; the left side of the idler wheel 2.2-7 contacts the shoulder of the idler wheel shaft 2.2-8 to limit the left axial displacement of the idler wheel 2.2-7, and the right side of the idler wheel 2.2-7 contacts the shaft end retaining ring 2.2-16 on the right side of the idler wheel shaft 2.2-8 to limit the right axial displacement of the idler wheel 2.2-7.

[0084] The first rotary retractable side plate assembly and the second rotary retractable side plate assembly have the same structure but opposite installation directions, and both include: a side plate body 4.1, a hollow gear shaft 4.2, and a hanging ring 4.3; the hollow gear shaft 4.2 is fixedly connected to the outer side surface of one side of the side plate body 4.1, and the hanging ring 4.3 is arranged on the other side of the side plate body 4.1, and the hollow gear shaft 4.2 is coaxial with the opening on the hanging ring 4.3; the ring gear of the hollow gear shaft 4.2 is meshed with the idler wheel 2.2-7, and the hanging ring 4.3 is sleeved in the other end of the bed board system driving bracket body 2.1 away from the idler wheel 2.2-7.

[0085] The first rotating retractable side plate assembly is controlled by the worm drive kit 2.2-1 located on one side of the bed board driving bracket body 2.1 through the above-mentioned transmission chain, and rotates around the axis of its hollow gear shaft 4.2; the second rotating retractable side plate assembly is controlled by the worm drive kit 2.2-1 located on the other side of the bed board driving bracket body 2.1 through the above-mentioned transmission chain, and rotates around the axis of its hollow gear shaft 4.2.

[0086] like Figure 3-5 As shown, the main bed surface driving assembly 2.3 includes a cam plate 2.3-1, a push rod 2.3-2, an electric push rod 2.3-3, and a limit bolt 2.3-4 at the fixed end of the electric push rod; the main bed surface assembly 3 rotates coaxially with the first rotary retractable side plate assembly and the second rotary retractable side plate assembly; a hollow internal spline shaft is respectively provided on the outer sides of both ends of the main bed surface assembly 3 along the X direction, and the spline shaft on the cam plate 2.3-1 is installed in the spline hole of the hollow internal spline shaft and the two cannot rotate relative to each other; one end of the push rod 2.3-2 is connected to the cam plate 2.3-1, and the other end is connected to the electric push rod 2.3-3 through the electric push rod movable end connecting sleeve 2.3-5; the push rod 2.3-2 is installed in the slideway inside the side end of the bed board system driving bracket body 2.1 and can only move up and down; the other end of the electric push rod 2.3-3 away from the push rod 2.3-2 is hinged to the bed board system driving bracket body 2.1 through the electric push rod fixed end limit bolt 2.3-4.

[0087] The electric push rod 2.3-3 drives the push rod 2.3-2 to move up and down, thereby pushing the cam plate 2.3-1 to rotate, and then controlling the main bed surface assembly 3 to rotate.

[0088] Specifically, we still take the structure on the left as an example for description. Figure 4As shown, the gear ring of the hollow gear shaft 4.2 on the first rotating retractable side plate assembly is meshed with the idler gear 2.2-7, and the internal shaft hole bearing hole section of the hollow gear shaft 4.2 on the first rotating retractable side plate assembly cooperates with the outer ring of the second rolling bearing 2.3-7 on the right side. Accordingly, the step surface of the hollow gear shaft 4.2 abuts against the outer ring of the second rolling bearing 2.3-7 on the right, and the left shaft hole end face of the hollow gear shaft 4.2 abuts against the bearing outer ring end face of the second rolling bearing 2.3-7 on the left side. The outer ring of the second rolling bearing 2.3-7 on the left is installed in the bearing hole of the bed board system driving bracket body 2.1, the inner ring of the second rolling bearing 2.3-7 on the left is installed on the hollow gear shaft 4.2 of the rotating retractable side plate assembly 4, and the second rolling bearing 2.3-7 on the right is installed on the hollow internal spline shaft of the main bed surface 3.1. A third sleeve 2.3-8 is provided between the left and right second rolling bearings 2.3-7. The outer ring end face of the second rolling bearing 2.3-7 on the left contacts with the third bearing end cover 2.3-6, limiting the left displacement of the shaft system parts on the hollow internal spline shaft of the main bed surface, and the inner ring end face of the second rolling bearing 2.3-7 on the right contacts with the stepped surface of the hollow internal spline shaft of the main bed surface 3.1, limiting the right displacement of the shaft system parts on the hollow internal spline shaft of the main bed surface. The hanging ring 4.3 of the second rotating retractable side plate assembly is sleeved on the outer ring of the second rolling bearing 2.3-7 on the right.

[0089] The spline shaft of the cam disc 2.3-1 is installed in the spline hole of the hollow internal spline shaft of the main bed surface 3.1, the limiting step surface on the left side of the spline shaft is clamped in the end face of the hollow internal spline shaft of the main bed surface, the axial limiting baffle 2.3-9 is installed on the right end face of the hollow internal spline shaft of the main bed surface, the limiting screw 2.3-10 is installed on the right side shaft end of the spline shaft of the cam disc 2.3-1, and the screw head is clamped on the right side of the axial limiting baffle 2.3-9 to axially limit the cam disc 2.3-1.

[0090] The structures of the first rotary retractable side panel assembly and the second rotary retractable side panel assembly include, in addition to the side panel body 4.1, the hollow gear shaft 4.2, and the hanging ring 4.3, a side panel air cushion 4.4 and a safety guardrail 4.5. The side panel air cushion 4.4 is fixed to the inner surface of the side panel body 4.1 by an air cushion fixing belt 4.4-4; the safety guardrail 4.5 is a retractable pipe.

[0091] like Figure 5As shown, the main bed surface assembly 3 includes a main bed surface 3.1, an L-shaped member 3.2, a spring 3.3, and a side plate air cushion pressure roller 3.4; the long end of the L-shaped member 3.2 is a shaft, and the short end is a thick plate perpendicular to the axis of the long end shaft. The short end is provided with an axial hole, and the axial direction of the axial hole is parallel to the axis of the long end shaft of the L-shaped member 3.2; the L-shaped member 3.2 is hinged to the L-shaped member fixed shaft 3.5 on the four corners of the main bed surface 3.1 through the short end axial hole, and the L-shaped member 3.2 is restricted from moving along the direction of its short end axial hole, but the rotation is not restricted; the spring 3.3 is installed between the notch of the L-shaped member 3.2 and the spring groove of the main bed surface 3.1, and the spring 3.3 is in a full-length state when not working, and the side plate air cushion pressure roller 3.4 is installed on the long end shafts of the two L-shaped members 3.2 symmetrically arranged along the X direction of the main bed surface 3.1. Figure 5 In the figure, the part indicated by B is a schematic diagram of the part indicated by A after assembly.

[0092] like Figure 6 As shown, the safety guardrail 4.5 on the first rotary retractable side plate assembly is installed on the side end surface of the side plate body 4.1 where the hollow gear shaft 4.2 is installed, and the safety guardrail 4.5 on the second rotary retractable side plate assembly is installed on the side end surface of the side plate body 4.1 opposite to the side end surface where the hollow gear shaft 4.2 is installed. That is, the installation and fixing directions of the safety guardrails 4.5 on the two rotary retractable side plate assemblies 4 are opposite.

[0093] like Figure 7 As shown, the side panel air cushion 4.4 is composed of a plurality of first air bags 4.4-1 (three in this embodiment) connected vertically, a first exhaust guide skeleton 4.4-2 is fixed inside the first air bag 4.4-1 at the joint of every two connected first air bags 4.4-1, all the first exhaust guide skeletons 4.4-2 are inclined to one side, a first air bag connecting port 4.4-3 is provided on the first exhaust guide skeleton 4.4-2, and a fixing belt 4.4-4 is also fixed to the overall outer ring of the side panel air cushion 4.4; the inflation of the first air bag 4.4-1 is achieved by an electrically controlled air pump 6, and the exhaust of the first air bag 4.4-1 is achieved by extrusion between the first rotary contraction side panel assembly, the second rotary contraction side panel assembly and the main bed surface assembly 3.

[0094] like Figure 6 As shown, the side panel body 4.1 is semi-I-shaped, and the side surfaces of the side panel body 4.1 are fan-shaped; the semi-I-shaped side panel body 4.1 is an arc-shaped section from its cross-section, and its inner surface corresponds to the side with a larger curvature of the arc-shaped section.

[0095] The air cushion assembly 5 is fixed above the main bed surface assembly 3 to support the corresponding parts of the human body.

[0096] Specifically, Fig.10As shown, the air cushion group 5 is composed of an inflatable mattress 5.1, an inflatable pillow 5.2, and an inflatable back-lifting cushion 5.3. The air inlet pipes of each component of the air cushion group 5 are connected to the electronically controlled air pump 6. The inflatable pillow 5.2 and the inflatable back-lifting cushion 5.3 in this embodiment are both prior arts, so they will not be described in detail here.

[0097] like Figure 8 , 10 As shown, the inflatable mattress 5.1 is also fixedly connected to a section of bent-leg inflatable cushion 5.4 at the position corresponding to the knee joint when the human body is lying flat. The bent-leg inflatable cushion 5.4 is composed of a plurality of second air bags 5.4-1 combined with each other. The cross section of a single second air bag 5.4-1 is in the shape of a small fan. The plurality of second air bags 5.4-1 are combined with the side surfaces of adjacent second air bags 5.4-1 in sequence. The sides of the combined second air bags 5.4-1 constitute the second exhaust guide skeleton 5.4-2 of the entire bent-leg inflatable cushion 5.4. Each second exhaust guide skeleton 5.4-2 is provided with a second air bag connecting port 5.4-3. Adjacent second air bag connecting ports 5.4-3 are respectively staggeredly arranged on the second exhaust guide skeleton 5.4-2. An air intake and exhaust port 5.4-4 is provided at the tail of the side surface of the second air bag 5.4-1 on the bottom layer. A fixed skirt edge 5.4-5 bonded to the inflatable mattress 5.1 is also provided around the bent-leg inflatable cushion 5.4.

[0098] The working principle of the present invention is:

[0099] The present invention can realize the main bed surface assembly 3 to rotate clockwise or counterclockwise around the axis of the cam plate 2.3-1, and the rotary retractable side plate assembly 4 to rotate coaxially clockwise or counterclockwise with the main bed surface assembly 3. The present invention can also realize the lifting of the bed body, and the air cushion assembly 5 on the main bed surface assembly 3 can preliminarily realize the user's body position change.

[0100] The main bed surface assembly 3 and the rotatable retractable side plate assembly 4 of the present invention can rotate coaxially, but the two do not rotate synchronously. The rotation direction and angle of the two can be controlled separately, which allows the two to be combined into a variety of different usage modes. For example: Figure 1 As shown, when the main bed surface 3.1 is parallel to the ground, that is, when the user is in a lying position, the rotatable retractable side panel components 4 stand on both sides of the main bed surface component 3 to play a protective role; Fig. 9 As shown, when the main bed surface 3.1 forms a certain angle with the ground, that is, when the user is in a side-turned state, one of the two rotatable retractable side panel assemblies 4 will rotate to the bottom of the user to support the user, and the other rotatable retractable side panel will rotate to the back of the main bed surface 3.1, which will not hinder the nursing staff from performing side-turning care for the user.

[0101] The driving and transmission chain of the main bed surface assembly 3 is as follows: the main bed surface assembly 3 rotates axially along the second rolling bearing 2.3-7 relative to the bed board system driving bracket body 2.1, the main bed surface assembly 3 is connected to the cam plate 2.3-1 through a spline, the stick on the cam plate 2.3-1 cooperates with the push rod 2.3-2, the push rod 2.3-2 can only move up and down under the restriction of the slideway in the side end of the bed board system driving bracket body 2.1, and the push rod 2.3-2 pushes the stick of the cam plate 2.3-1 to make the cam plate 2.3-1 drive the main bed surface assembly 3 to rotate along its axis. The power of the push rod 2.3-2 comes from the electric push rod 2.3-3.

[0102] The drive and transmission chain of the rotary retractable side plate assembly 4 (including the first rotary retractable side plate assembly and the second rotary retractable side plate assembly) is as follows: Taking the first rotary retractable side plate assembly as an example, one end of the first rotary retractable side plate assembly is a hollow gear shaft 4.2, and the hollow gear shaft 4.2 has an inner hole with the same diameter as the outer ring of the second rolling bearing 2.3-7. The hollow gear shaft 4.2 cooperates with the outer ring of the second rolling bearing 2.3-7 by relying on this inner hole, and the other end of the first rotary retractable side plate assembly is a hanging ring 4.3, which is installed on the outer ring of the second rolling bearing 2.3-7 on the other side. As a result, the rotary retractable side plate assembly 4 can rotate around the axis of the second rolling bearing 2.3-7. The outer gear ring of the hollow gear shaft 4.2 meshes with the idler gear 2.2-7, the idler gear 2.2-7 meshes with the second-stage second combined gear 2.2-5, the second-stage second combined gear 2.2-5 meshes with the second-stage first gear 2.2-4, the second-stage first gear 2.2-4 rotates coaxially with the worm gear 2.2-2, and the worm gear 2.2-2 meshes with the worm drive kit 2.2-1. The rotary retractable side plate assembly 4 is driven by the worm drive kit 2.2-1, wherein the worm drive kit 2.2-1 includes a motor, a worm, a bearing, a bearing seat, etc. This is a prior art, so it is not described in detail.

[0103] The worm gear pair used in the present invention can be self-locking, and the electric push rod 2.3-3 is an existing product that can also achieve self-locking. Therefore, when the power is not supplied, the main bed surface assembly 3 and the rotary retractable side plate assembly 4 can both be self-locked in their positions.

[0104] The side panel air cushion 4.4, the air cushion group 5 and the corresponding components in the electric control air pump 6 in the present invention are connected through an air guide hose. For the sake of simplicity, the hose is not drawn in the figure. The inflation order of the side panel air cushion 4.4 and the air cushion group 5 is different due to actual needs. Therefore, in order to avoid misunderstandings of the limitations of the present invention, the inflation order of the air cushion is not rigidly described here. Similarly, the multi-channel output air pump is an existing product on the market, so its principle is not analyzed.

[0105] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multifunctional posture changing nursing bed device, characterized in that: include: A lifting support component (1), a bed board driving bracket component (2), a main bed surface component (3), a rotating retractable side board component (4), an air cushion group (5), and an electrically controlled air pump (6); wherein the horizontal direction when a human body lies normally is the X direction, the vertical direction perpendicular to the X direction is the Y direction, and the vertical direction perpendicular to the X direction is the Z direction; The lifting support component (1) is used to realize the lifting control of the entire nursing bed body along the Z direction; The bed board driving bracket component (2) comprises a bed board driving bracket body (2.1) with a left-right central symmetry in appearance and internal structure, and driving components respectively installed inside the two side ends of the bed board driving bracket body (2.1) along the X direction, wherein the driving components comprise a side plate driving component (2.2) and a main bed surface driving component (2.3); the bed board driving bracket component (2) is installed above the lifting support component (1); The main bed surface assembly (3) and the rotating retractable side plate assembly (4) are mounted above the bed board driving bracket body (2.1); the rotating retractable side plate assembly (4) comprises a first rotating retractable side plate assembly and a second rotating retractable side plate assembly which are respectively arranged on both sides of the main bed surface assembly (3) in the Y direction; the end of the main bed surface assembly (3) and the ends of the first rotating retractable side plate assembly and the second rotating retractable side plate assembly are coaxially rotatably mounted inside the side end of the bed board driving bracket body (2.1); the main bed surface driving assembly (2.3) can drive the main bed surface assembly (3) to rotate clockwise or counterclockwise with the X direction as the axis; the side plate driving assembly (2.2) comprises a first side plate driving assembly and a second side plate driving assembly which are respectively arranged inside the two side ends of the bed board driving bracket body (2.1), and the first side plate driving assembly and the second side plate driving assembly can respectively drive the first rotating retractable side plate assembly and the second rotating retractable side plate assembly to rotate clockwise or counterclockwise with the X direction as the axis; The first side plate drive assembly and the second side plate drive assembly have the same structure, and both include: a worm drive kit (2.2-1), a worm wheel (2.2-2), a high-speed shaft (2.2-3), a secondary first gear (2.2-4), a secondary second combined gear (2.2-5), a secondary shaft (2.2-6), an idler wheel (2.2-7), and an idler wheel shaft (2.2-8); wherein the worm drive kit (2.2-1) is installed on the bed board system drive bracket body (2.1) in the worm cavity in the side end, the worm wheel (2.2-2) meshes with the worm in the worm drive kit (2.2-1); the high-speed shaft (2.2-3) is a rotating shaft, the worm wheel (2.2-2) is installed on the worm wheel shaft section of the high-speed shaft (2.2-3), and rotates synchronously with the high-speed shaft (2.2-3); the secondary first gear (2.2-4) is installed on the spur gear shaft section of the high-speed shaft (2.2-3), and is also rotated with the high-speed shaft (2.2-3). The second-stage second combined gear (2.2-5) is meshed with the second-stage first gear (2.2-4), the second-stage second combined gear (2.2-5) is installed on the second-stage shaft (2.2-6), the second-stage shaft (2.2-6) is a spindle, the second-stage second combined gear (2.2-5) and the second-stage shaft (2.2-6) can rotate relative to each other, the second-stage shaft (2.2-6) and the bed plate driving bracket body (2.1 ) are fixed and do not rotate relative to each other; the idler wheel (2.2-7) is meshed with the second-stage second combined gear (2.2-5); the idler wheel (2.2-7) is mounted on an idler wheel shaft (2.2-8); the idler wheel shaft (2.2-8) is a spindle; the idler wheel shaft (2.2-8) and the bed board system driving bracket body (2.1) are fixed and do not rotate relative to each other; the idler wheel shaft (2.2-8) and the idler wheel (2.2-7) can rotate relative to each other; An air cushion group (5), the air cushion group (5) being fixed above the main bed surface assembly (3) to support a human body; An electrically controlled air pump (6), the electrically controlled air pump (6) being installed inside the lifting support component (1) and used for inflating; The lifting support component (1) comprises a base (1.1) and a lifting column (1.2); the lifting column (1.2) is fixedly connected above the base (1.1); the bed board driving bracket component (2) is installed above the lifting column (1.2); and the lifting column (1.2) is lifted and lowered in the Z direction under electric control.

2. A multifunctional posture changing nursing bed device according to claim 1, characterized in that: The first rotary retractable side plate assembly and the second rotary retractable side plate assembly have the same structure but opposite installation directions, and both comprise: a side plate body (4.1), a hollow gear shaft (4.2), and a hanging ring (4.3); the hollow gear shaft (4.2) is fixedly connected to one side outer surface of the side plate body (4.1), the hanging ring (4.3) is arranged on the other side of the side plate body (4.1), and the hollow gear shaft (4.2) is coaxial with the opening on the hanging ring (4.3); the gear ring of the hollow gear shaft (4.2) is meshed with the idler wheel (2.2-7), and the hanging ring (4.3) is sleeved in the other end of the bed board system driving bracket body (2.1) away from the idler wheel (2.2-7); The first rotating retractable side plate assembly is controlled by the worm drive assembly (2.2-1) located on one side of the bed board system driving bracket body (2.1) through a transmission chain, and rotates around the axis of its hollow gear shaft (4.2); the second rotating retractable side plate assembly is controlled by the worm drive assembly (2.2-1) located on the other side of the bed board system driving bracket body (2.1) through a transmission chain, and rotates around the axis of its hollow gear shaft (4.2).

3. The multifunctional posture changing nursing bed device according to claim 2, characterized in that: The main bed surface drive assembly (2.3) comprises a cam plate (2.3-1), a push rod (2.3-2), an electric push rod (2.3-3), and a limit bolt (2.3-4) at the fixed end of the electric push rod; the main bed surface assembly (3) rotates coaxially with the first rotary retractable side plate assembly and the second rotary retractable side plate assembly; the main bed surface assembly (3) is provided with a hollow inner spline shaft on both ends of the outer side along the X direction, the spline shaft on the cam plate (2.3-1) is installed in the spline hole of the hollow inner spline shaft and the two The two cannot rotate relative to each other; one end of the push rod (2.3-2) is connected to the cam plate (2.3-1), and the other end is connected to the electric push rod (2.3-3); the push rod (2.3-2) is installed in a slideway in the side end of the bed board system driving bracket body (2.1) and can only move up and down; the other end of the electric push rod (2.3-3) away from the push rod (2.3-2) is hinged to the bed board system driving bracket body (2.1) through the electric push rod fixed end limit bolt (2.3-4); The electric push rod (2.3-3) drives the push rod (2.3-2) to move up and down, thereby pushing the cam plate (2.3-1) to rotate, thereby controlling the main bed surface assembly (3) to rotate.

4. The multifunctional posture changing nursing bed device according to claim 2, characterized in that: The structures of the first rotating retractable side panel assembly and the second rotating retractable side panel assembly also include a side panel air cushion (4.4) and a safety guardrail (4.5); the side panel air cushion (4.4) is fixed to the inner surface of the side panel body (4.1) via an air cushion fixing belt (4.4-4); and the safety guardrail (4.5) is a retractable pipe.

5. The multifunctional posture changing nursing bed device according to claim 4, characterized in that: The main bed surface assembly (3) comprises a main bed surface (3.1), an L-shaped component (3.2), a spring (3.3), and a side plate air cushion roller (3.4); the long end of the L-shaped component (3.2) is a section of shaft, and the short end is a thick plate perpendicular to the axis of the long end shaft. The short end is provided with an axial hole, and the axial direction of the axial hole is parallel to the axis of the long end shaft of the L-shaped component (3.2); the L-shaped component (3.2) is hinged to the four corners of the main bed surface (3.1) through the short end axial hole. The L-shaped component is fixed on the shaft (3.5) and limits the movement of the L-shaped component (3.2) along the direction of its short end shaft hole, but the rotation is not restricted; the spring (3.3) is installed between the notch of the L-shaped component (3.2) and the spring groove of the main bed surface (3.1), and the spring (3.3) is in a full-length state when not in operation; the side plate air cushion pressure roller (3.4) is installed on the long end shafts of two L-shaped components (3.2) symmetrically arranged along the X direction on the main bed surface (3.1).

6. The multifunctional posture changing nursing bed device according to claim 4, characterized in that: The safety guardrail (4.5) on the first rotating retractable side plate assembly is mounted on the side end surface of the side plate body (4.1) on which the hollow gear shaft (4.2) is mounted, and the safety guardrail (4.5) on the second rotating retractable side plate assembly is mounted on the side end surface of the side plate body (4.1) opposite to the side end surface on which the hollow gear shaft (4.2) is mounted.

7. The multifunctional posture changing nursing bed device according to claim 4, characterized in that: The side panel air cushion (4.4) is composed of a plurality of first air bags (4.4-1) connected vertically, a first exhaust guide frame (4.4-2) is fixed inside the first air bag (4.4-1) at the joint of every two connected first air bags (4.4-1), all first exhaust guide frames (4.4-2) are inclined to one side, a first air bag connecting port (4.4-3) is provided on the first exhaust guide frame (4.4-2), and a fixing belt (4.4-4) is also fixed to the overall outer ring of the side panel air cushion (4.4); the inflation of the first air bag (4.4-1) is achieved by the electric-controlled air pump (6), and the exhaust of the first air bag (4.4-1) is achieved by extrusion between the first rotating and retractable side panel assembly, the second rotating and retractable side panel assembly and the main bed surface assembly (3).

8. The multifunctional posture changing nursing bed device according to claim 4, characterized in that: The side panel body (4.1) is semi-I-shaped, and the side surfaces of the side panel body (4.1) are fan-shaped; the semi-I-shaped side panel body (4.1) is an arc-shaped section from its cross-section, and its inner surface corresponds to the side with a larger curvature of the arc-shaped section.

9. The multifunctional posture changing nursing bed device according to claim 1, characterized in that: The air cushion group (5) is composed of an inflatable mattress (5.1), an inflatable pillow (5.2), and an inflatable back cushion (5.3). The air inlet pipes of the various components of the air cushion group (5) are connected to the electronically controlled air pump (6). The inflatable mattress (5.1) is also fixedly connected to a bent-leg inflatable cushion (5.4) at the position corresponding to the knee joint when the human body lies flat. The bent-leg inflatable cushion (5.4) is composed of a plurality of second air bags (5.4-1) that are connected to each other. The cross section of a single second air bag (5.4-1) is in the shape of a small fan. The plurality of second air bags (5.4-1) are sequentially connected to the side surfaces of adjacent second air bags (5.4-1). The side surfaces of the second airbags (5.4-1) combined together form the second exhaust guide frame (5.4-2) of the entire bent-leg inflatable cushion (5.4); each of the second exhaust guide frames (5.4-2) is provided with a second airbag connecting port (5.4-3); adjacent second airbag connecting ports (5.4-3) are staggeredly arranged on the second exhaust guide frames (5.4-2); an air intake and exhaust port (5.4-4) is arranged at the tail of the side surface of the second airbag (5.4-1) at the bottom layer; and a fixed skirt edge (5.4-5) bonded to the inflatable mattress (5.1) is also arranged around the bent-leg inflatable cushion (5.4).

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