Adjustable virtual center rotating device

Abstract

The invention relates to the technical field of movement mechanism design, and provides an adjustable virtual center rotation device which comprises a rack, a movable part, an overturning unit and an adjusting unit. The movable part is arranged on the rack. The overturning unit is connected with the movable part so as to drive the movable part to overturn. The adjusting unit is arranged on the rack, a moving seat is arranged on the adjusting unit, the adjusting unit is configured to be capable of driving the moving seat to move in at least one direction, and the moving seat is connected with the overturning unit so as to adjust the overturning center position of the overturning unit. Through the synergistic effect of the overturning unit and the adjusting unit, the rotation center of the movable part can be accurately adjusted, so that the rotation center of the movable part is kept consistent with the body rotation centers of different users. The problem that a traditional nursing bed is poor in adaptability due to the fact that the rotation center is fixed is effectively solved, and personalized nursing is provided for users of different heights and body types. The application range of the nursing bed is greatly widened, and a user who is tall or short can have comfortable back lifting experience.

Description

Technical Field

[0001] The invention relates to the technical field of motion mechanism design, and in particular to an adjustable virtual center rotation device. Background Art

[0002] As my country gradually enters an aging society, medical care and nursing for the elderly, especially those with limited mobility and lower limb disabilities, has become a social problem that must be solved. At present, the design of devices to solve human life problems has become a hot topic of research. Among them, nursing beds, as a medical auxiliary device, are favored by more and more elderly people and disabled people. Most hospitals, nursing homes and families in China still use traditional hand-cranked nursing beds. Although there are service devices designed for the disabled in China, they cannot be developed well due to technical limitations and high prices.

[0003] When a traditional nursing bed is used, the rotation center of the backboard is not adjustable, which results in different horizontal rotation centers for people of different heights and body structures. When people with taller heights use the bed, the gap between the buttocks and the backboard is larger, and the pressure on the waist will increase. Long-term use will cause waist discomfort. When people with shorter heights use the bed, their heads are at the head of the bed when they lie flat, so their bodies will slide down during the process of raising their backs, causing the clothes on their backs to be pulled. When they return from the backboard to the starting position, their heads cannot return to the starting position of the bedhead. For thin or fat people or people in different seasons, the thickness of the mattress is different, which makes the vertical position of the human body's rotation center different, which will aggravate the back-pulling phenomenon during the process of raising their backs, increase the pressure on the waist, and easily cause danger in the long run. Many motion mechanisms require a virtual rotation center, and the position of the rotation center is adjustable. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an adjustable virtual center rotation device whose rotation center can be adjusted.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides an adjustable virtual center rotation device, comprising:

[0006] frame;

[0007] A movable part is arranged on the frame;

[0008] A turning unit connected to the movable member to drive the movable member to turn over;

[0009] The adjusting unit is arranged on the frame, and a moving seat is arranged on the adjusting unit. The adjusting unit is configured to be able to drive the moving seat to move in at least one direction, and the moving seat is connected to the flipping unit to adjust the flipping center position of the flipping unit.

[0010] In an optional embodiment of the present invention, the flipping unit includes a linear drive unit and a connecting rod unit, and both ends of the linear drive unit are hinged to the movable part and the frame / the movable seat to drive the movable part to flip, or both ends of the linear drive unit are hinged to the frame / the movable seat and the connecting rod unit to drive the movable part to flip.

[0011] In an optional embodiment of the present invention, the connecting rod unit is connected to the moving seat and the movable member respectively.

[0012] In an optional embodiment of the present invention, two groups of linear drive structures are provided on the movable member, and the connecting rod unit is respectively connected to the moving ends of the two groups of linear drive structures and the moving seat.

[0013] In an optional embodiment of the present invention, the moving direction of the linear drive structure is within a plane perpendicular to the flip center axis.

[0014] In an optional embodiment of the present invention, the connecting rod unit includes two groups of first connecting rods, second connecting rods and third connecting rods, the first connecting rods are respectively hinged to the moving seat and the third connecting rod, the second connecting rods are respectively hinged to the moving seat and the third connecting rod, and the extending ends of the two groups of the third connecting rods are respectively hinged to the moving ends of the two groups of the linear drive structures.

[0015] In an optional embodiment of the present invention, the first connecting rod, the second connecting rod, the third connecting rod and the moving seat together form a parallelogram mechanism.

[0016] In an optional embodiment of the present invention, the adjustment unit includes a first linear adjustment device and a second linear adjustment device, the second linear adjustment device is arranged at the moving end of the first linear adjustment device, and the moving seat is arranged at the moving end of the second linear adjustment, the adjustment direction of the first linear adjustment device is a first direction, and the adjustment direction of the second linear adjustment device is a second direction, and the first direction and the second direction do not overlap.

[0017] In an optional embodiment of the present invention, the first direction is the length direction of the rack, and the second direction is the vertical direction.

[0018] In an optional embodiment of the present invention, the turning unit and the adjusting unit are arranged on the lower side of the frame.

[0019] The technical effect of the present invention is that the present invention proposes an adjustable virtual center rotation device, which can accurately adjust the rotation center of the movable part through the synergistic effect of the flip unit and the adjustment unit to keep it consistent with the body rotation center of different users. It effectively solves the problem of poor adaptability caused by the fixed rotation center of traditional nursing beds, and provides personalized care for users of different heights and body shapes. It greatly improves the scope of application of nursing beds, and both tall and short users can get a comfortable back-lifting experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of an adjustable virtual center rotation device in one embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of an adjustable virtual center rotating device in one embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the principle of an adjustable virtual center rotation device in one embodiment of the present invention;

[0024] Figure 4 FIG. 4 is a schematic structural diagram of an adjustable virtual center rotating device in one embodiment of the present invention from another perspective.

[0025] Explanation of the reference numerals: 10, frame; 11, movable part; 20, linear drive unit; 30, adjustment unit; 31, first linear adjustment device; 32, second linear adjustment device; 33, movable seat; 40, connecting rod unit; 41, first connecting rod; 42, second connecting rod; 43, third connecting rod; 50, linear drive structure; 51, slide rail; 52, slider; 53, drive member; 60, flip center. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0028] At present, most of the nursing beds widely used in China are traditional hand-cranked nursing beds. Although this type of nursing bed meets basic nursing needs to a certain extent, it has a single function, is inconvenient to adjust, and has many technical limitations, especially in the back-lifting function. The back-lifting board of traditional nursing beds is usually designed with a fixed rotation center, which is difficult to adapt to users of different heights, body shapes and weights, resulting in the following problems:

[0029] The center of gravity of the human body does not match the center of rotation. When the user raises his back, the center of rotation of the nursing bed remains fixed and cannot be adjusted according to the user's height, body shape or mattress thickness. When a tall user raises his back, a large gap will be created between the buttocks and the backrest board due to the mismatch between the center of rotation and the center of gravity of the human body, which will increase the pressure on the waist. Long-term use can easily cause waist discomfort or even injury.

[0030] Sliding and clothing pulling problems. When a shorter user gets up, the head is close to the head of the bed, and the body will slide down during the process, and the clothes on the back will be pulled, which not only affects the comfort but also increases the difficulty of care. This sliding phenomenon is particularly obvious in different seasons and when the thickness of the mattress changes, further exacerbating the inconvenience of use.

[0031] Uneven pressure on the waist. When users of different body shapes are lifting their backs, the pressure on their waists is unevenly distributed. For thin or fat people, the waist is not in sufficient contact with the bed surface, and the burden on the waist increases when lifting their backs. Long-term use may lead to lumbar muscle strain. In addition, changes in the thickness of the mattress will also cause changes in the contact surface between the human body and the nursing bed, further affecting the lifting effect.

[0032] Difficulty in returning to the original position. When using a traditional nursing bed, it is difficult for the head to maintain the same position with the head of the bed, especially when the user returns to a lying position from a raised position. This problem not only affects comfort, but may also cause the user to fall due to improper position.

[0033] In the above context, the market has put forward higher requirements for more humane and intelligent nursing beds. In recent years, although some progress has been made in the field of intelligent nursing beds at home and abroad, the penetration rate of intelligent nursing beds is still low due to high technical barriers and high equipment costs. This requires the development of nursing beds with adjustable virtual rotation centers to meet the personalized needs of different groups of people.

[0034] Therefore, developing a nursing bed with an adjustable virtual rotation center is of great significance to improving the quality of life of the elderly and disabled. This technological breakthrough will effectively solve many problems existing in traditional nursing beds and provide a more scientific, convenient and efficient solution for medical care in the context of an aging society.

[0035] The driving mechanism for linear movement in the present application may be a screw nut, a cylinder, a hydraulic cylinder, a gear rack or the like.

[0036] like Figure 1-4 As shown, the present invention provides an adjustable virtual center rotating device, including a frame 10, a movable part 11, a flip unit and an adjustment unit 30. The adjustable virtual center rotating device is applied to a nursing bed, wherein the frame 10 corresponds to the bed frame, and the movable part 11 corresponds to the backboard.

[0037] The movable member 11 is disposed on the frame 10 .

[0038] The flip unit is connected to the movable part 11 to drive the movable part 11 to flip. The flip unit directly drives the movable part 11 to flip, and the dynamic adjustment of the flip center 60 further optimizes the motion trajectory. The flip unit can specifically be an electric push rod flip unit, a hydraulic drive flip unit, a mechanical gear rack flip unit, a connecting rod mechanism flip unit, a rope pulley flip unit, a ball screw flip unit, an eccentric wheel drive flip unit, a magnetic drive flip unit, etc.

[0039] The adjusting unit 30 is arranged on the frame 10, and a moving seat 33 is arranged on the adjusting unit 30. The adjusting unit 30 is configured to be able to drive the moving seat 33 to move in at least one direction, and the moving seat 33 is connected to the flip unit to adjust the position of the flip center 60 of the flip unit. Through the moving seat 33 in the adjusting unit 30, the flip unit can be accurately moved in at least one direction, so as to dynamically adjust the position of the flip center 60 of the movable part 11. The limitation that the traditional fixed flip center 60 is difficult to adapt to users of different heights and body shapes is solved. The precise matching of the flip trajectory of the movable part 11 and the movement of the back of the human body is achieved to avoid human body sliding and friction. The applicability of the adjustable virtual center rotation device is improved, and it is suitable for a wide range of users, including children, adults and the elderly.

[0040] like Figure 1-4As shown, the flipping unit includes a linear drive unit 20 and a connecting rod unit 40, and the two ends of the linear drive unit 20 are hinged to the movable part 11 and the frame 10 / the movable seat 33 to drive the movable part 11 to flip, or the two ends of the linear drive unit 20 are hinged to the frame 10 / the movable seat 33 and the connecting rod unit 40 to drive the movable part 11 to flip. The linear drive unit 20 can provide stable and linear motion, reducing the jitter or instability that may occur in complex mechanical structures; at the same time, the connecting rod unit 40 further optimizes the motion trajectory and improves the smoothness and reliability of the movement. The linear drive unit 20 directly controls the angle of the movable part 11, and the connecting rod unit 40 compensates and optimizes the flipping trajectory, making the flipping process more natural and smooth, avoiding abrupt movements.

[0041] The connecting rod unit 40 is connected to the moving seat 33 and the movable member 11 respectively. The connecting rod unit 40 can coordinate the overall movement of the movable member 11 under the drive of the linear drive unit 20, so that it can maintain stability and support at different positions. The design of the connecting rod unit 40 can adjust the length or angle according to different needs to adapt to specific flipping needs.

[0042] like Figure 1-4 As shown, two groups of the linear drive structures 50 are provided on the movable part 11, and the connecting rod unit 40 is respectively connected to the moving ends of the two groups of the linear drive structures 50 and the moving seat 33. The linear drive structure 50 can adaptively adjust the displacement of the moving seat 33 on the adjustment unit 30 to prevent interference, and the linear drive structure 50 includes a slide rail 51, a slider 52 and a driving member 53. The linear drive structure 50 allows the moving seat 33 to slide freely during the adjustment process through the combination of the slide rail 51 and the slider 52, thereby avoiding interference problems caused by incomplete matching of the motion trajectory. The slide rail 51 and the slider 52 provide a controllable and limited motion path for the moving seat 33, and cooperate with the connecting rod unit 40 to adjust the distribution of force, thereby effectively reducing the conflict between machines.

[0043] The two sets of linear drive structures 50 can evenly distribute the load, avoid excessive force on one side, reduce local stress concentration, and extend the service life of the structure and components. Since the two sets of linear drive structures 50 act synchronously, the system will not generate excess lateral force or torque during movement in the first direction, thereby improving the smoothness and accuracy of movement. The connecting rod unit 40 can form a mechanical "mirror" structure, which can effectively offset the overturning or distortion that may be caused by asymmetric force and improve the overall stability of the system. In complex working environments or vibration environments, the symmetrical structure can better absorb and disperse external shocks and reduce the risk of equipment failure.

[0044] like Figure 1-4As shown, the moving direction of the linear drive structure 50 is parallel to the board surface direction of the movable part 11 and perpendicular to the flip center 60 of the movable part 11. That is, the moving direction of the linear drive structure 50 is in the vertical plane of the flip center axis. The linear drive direction is consistent with the movement direction of the movable part 11, which effectively avoids complex mechanical conversion and ensures the smoothness of the flipping action. Since the linear drive direction is parallel to the board surface, unnecessary lateral force can be avoided during the driving process, reducing the vibration or offset problem of the system caused by lateral force. The driving method perpendicular to the flip center 60 reduces the overall system swing caused by the flipping movement and improves the safety and comfort of the adjustable virtual center rotating device.

[0045] like Figure 1-4 As shown, the connecting rod unit 40 includes two groups of first connecting rods 41, second connecting rods 42 and third connecting rods 43, the first connecting rods 41 are respectively hinged to the moving seat 33 and the third connecting rods 43, the two groups of the second connecting rods 42 are respectively hinged to the moving seat 33 and the two groups of the third connecting rods 43, and the extension section of the third connecting rod 43 is hinged to the moving end of the linear drive structure 50. Through the planar polygonal mechanism formed by the hinge points of the first connecting rod 41, the second connecting rod 42 and the third connecting rod 43, flexible adjustment of multiple angles and positions can be achieved to meet different application requirements. The connecting rod unit 40 can adapt to the more complex motion trajectory of the moving seat 33, and provide a more natural lifting or flipping action for the movable part 11.

[0046] In an optional embodiment of the present invention, the first connecting rod 41, the second connecting rod 42, the third connecting rod 43 and the moving seat 33 are enclosed into a parallelogram mechanism. The geometric characteristics of the parallelogram mechanism determine that the moving seat 33 can always remain parallel to the initial direction during the movement, avoiding tilt or offset problems. During the driving process, the movement path of the moving seat 33 is strictly constrained by the parallelogram to ensure the accuracy of flipping or adjusting the angle. The length of each connecting rod in the parallelogram structure is fixed to form a closed motion chain. The system is balanced in force during movement, which significantly reduces vibration and impact. Since the structure has no additional degrees of freedom, there will be no abrupt changes in speed or direction when the driving force is transmitted to the moving seat 33 through the connecting rod, thereby achieving smooth movement.

[0047] like Figure 1-4As shown, the adjustment unit 30 includes a first linear adjustment device 31 and a second linear adjustment device 32, the second linear adjustment device 32 is arranged at the moving end of the first linear adjustment device 31, and the moving seat 33 is arranged at the moving end of the second linear adjustment, the adjustment direction of the first linear adjustment device 31 is the first direction, and the adjustment direction of the second linear adjustment device 32 is the second direction, and the first direction and the second direction do not overlap. The first linear adjustment device 31 and the second linear adjustment device 32 control different movement directions respectively, so that the system has the ability to freely adjust in a two-dimensional plane. Through the superposition of two adjustment directions, the moving seat 33 can realize a variety of complex motion paths, such as linear translation, oblique adjustment, and even curved motion, to meet multi-functional requirements.

[0048] like Figure 1-4 As shown, the first direction is the length direction of the frame 10, and the second direction is the vertical direction. The combined adjustment of the two directions can achieve more complex actions, such as forming an inclination angle when adjusting the relative height of the head and foot of the bed to help achieve a specific medical care posture.

[0049] like Figure 1-4 As shown, the flip unit and the adjustment unit 30 are arranged on the lower side of the frame 10. The space above and around the frame 10 is effectively released, and the bed surface is kept simple and flat. This design is suitable for use in environments with small spaces or multi-functional requirements, such as hospital wards or home care scenarios. There is no interference from complex mechanisms above, and the bed surface can be freely designed into shapes and materials that meet the needs of different users, such as using soft cushions, waterproof fabrics or segmented support structures to improve comfort.

[0050] In summary, the present invention proposes an adjustable virtual center rotating device, which can accurately adjust the rotation center of the movable part to keep it consistent with the body rotation center of different users through the synergistic effect of the flip unit and the adjustment unit 30. It effectively solves the problem of poor adaptability of the traditional adjustable virtual center rotating device due to the fixed rotation center, and provides personalized care for users of different heights and body shapes. The scope of application of the adjustable virtual center rotating device is greatly improved, and both tall and short users can get a comfortable back-lifting experience. The relative movement between the back and the bed surface is reduced, thereby avoiding the discomfort of clothes being pulled and human skin being rubbed. The comfort and user experience of the adjustable virtual center rotating device are improved, especially for long-term bedridden people, this improvement significantly reduces the nursing pressure and discomfort. The local pressure on the lumbar spine and buttocks is effectively reduced, avoiding waist discomfort or injury caused by uneven force. Under long-term use, it can significantly reduce waist muscle strain and chronic pain problems, and improve the quality of life of the elderly and lower limb disabled people. The movement of the movable part is smoother, reducing the possible risk of mechanical shaking or misoperation. It ensures the safety of the adjustable virtual center rotation device during operation and is suitable for various scenarios such as hospitals, nursing homes and home care.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0052] Although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some cases, some features of the present invention will be adopted without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Therefore, many modifications can be made to adapt specific environments or materials to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode for carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined solely by the appended claims.

Claims

1. An adjustable virtual center rotation device, characterized in that: include: frame; A movable part is arranged on the frame; A turning unit connected to the movable member to drive the movable member to turn over; The adjusting unit is arranged on the frame, and a moving seat is arranged on the adjusting unit. The adjusting unit is configured to be able to drive the moving seat to move in at least one direction, and the moving seat is connected to the flipping unit to adjust the flipping center position of the flipping unit.

2. The adjustable virtual center rotation device according to claim 1, characterized in that: The flipping unit includes a linear drive unit and a connecting rod unit, and both ends of the linear drive unit are hinged to the movable part and the frame / the moving seat to drive the movable part to flip, or both ends of the linear drive unit are hinged to the frame / the moving seat and the connecting rod unit to drive the movable part to flip.

3. The adjustable virtual center rotation device according to claim 2, characterized in that: The connecting rod unit is connected to the moving seat and the movable member respectively.

4. The adjustable virtual center rotation device according to claim 2, characterized in that: Two groups of the linear drive structures are arranged on the movable part, and the connecting rod unit is respectively connected with the moving ends of the two groups of the linear drive structures and the moving seat.

5. The adjustable virtual center rotation device according to claim 4, characterized in that: The moving direction of the linear drive structure is in a plane perpendicular to the flip center axis.

6. The adjustable virtual center rotation device according to claim 5, characterized in that: The connecting rod unit includes two groups of first connecting rods, second connecting rods and third connecting rods. The first connecting rods are respectively hinged to the moving seat and the third connecting rod, the second connecting rods are respectively hinged to the moving seat and the third connecting rod, and the extending ends of the two groups of the third connecting rods are respectively hinged to the moving ends of the two groups of the linear drive structures.

7. The adjustable virtual center rotation device according to claim 6, characterized in that: The first connecting rod, the second connecting rod, the third connecting rod and the moving seat together form a parallelogram mechanism.

8. The adjustable virtual center rotation device according to claim 2, characterized in that: The adjustment unit includes a first linear adjustment device and a second linear adjustment device, the second linear adjustment device is arranged at the moving end of the first linear adjustment device, and the moving seat is arranged at the moving end of the second linear adjustment, the adjustment direction of the first linear adjustment device is a first direction, and the adjustment direction of the second linear adjustment device is a second direction, and the first direction and the second direction do not overlap.

9. The adjustable virtual center rotation device according to claim 8, characterized in that: The first direction is the length direction of the rack, and the second direction is the vertical direction.

10. The adjustable virtual center rotation device according to claim 1, characterized in that: The turning unit and the adjusting unit are arranged on the lower side of the frame.

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