Sickbed height adjusting device and sickbed

Abstract

The utility model relates to the technical field of medical instruments, and provides a sickbed height adjusting device and a sickbed, the sickbed height adjusting device is connected to a base, and comprises a height adjusting unit, a curved surface unit, a transmission unit and a driving unit; the first end of the height adjusting unit is rotationally connected to the base; the driving unit is fixedly arranged on the base; the curved surface unit is provided with a curved surface, the curved surface unit is arranged on the driving unit, the transmission unit is arranged on the height adjusting unit, and the transmission unit is in contact with the curved surface. The structure can ensure that the cable connected with the driving unit does not move along with the lifting structure, and meanwhile, the movement distance of the curved surface unit and the lifting distance of the height adjusting unit keep a linear relation.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a hospital bed height adjustment device and a hospital bed. Background Art

[0002] In scanning devices such as Magnetic Resonance Imaging (MRI) and Computed Tomography (CT), the hospital bed is usually equipped with a lifting function, through which the target object is lifted from the initial position to the scanning height.

[0003] The driving device is arranged inside the height adjustment device to provide driving force for the height adjustment device. Different structures and arrangements of the driving devices have different effects on the overall movement process and force of the height adjustment device.

[0004] The existing drive device usually moves with the movement of the height adjustment device. For example, the drive device will rise, fall or deflect with the movement of the height adjustment device, causing the position of the connecting cable of the drive device to follow. Due to the high frequency of movement of the hospital bed and the long service life, the frequent movement of the cable poses a challenge to the service life of the cable. In addition, the position change and driving force of the height adjustment device during the movement process are nonlinear, which makes it difficult to control the position, speed and smoothness of the height adjustment device.

[0005] In order to solve the above problems, the utility model provides a device for adjusting the height of a hospital bed and a hospital bed. The device for adjusting the height of a hospital bed not only ensures that the driving device is relatively fixed during the driving process, and the cable does not move with the movement of the lifting structure, but also ensures that the driving force and the driving speed change linearly during the driving process. Utility Model Content

[0006] The utility model aims to provide a device for adjusting the height of a hospital bed and a hospital bed. The device for adjusting the height of a hospital bed not only ensures that the driving device is relatively fixed during the driving process, and the cable does not move with the movement of the lifting structure, but also ensures that the driving force and the driving speed change linearly during the driving process.

[0007] The utility model provides a hospital bed height adjustment device, which is connected to a base and comprises: a height adjustment unit, a curved surface unit, a transmission unit and a drive unit;

[0008] The driving unit is fixedly arranged on the base;

[0009] The curved surface unit has a curved surface, the curved surface unit is connected to the driving unit, the transmission unit is arranged on the height adjustment unit, and the transmission unit is in contact with the curved surface.

[0010] Optionally, the transmission unit is a rolling element, and the transmission unit and the curved surface are in rolling cooperation; and / or; the curved surface unit is a cam.

[0011] Optionally, a first avoidance gap is provided on the height adjustment unit, and the transmission unit is installed in the first avoidance gap.

[0012] Optionally, at least a portion of the drive unit is located in the first avoidance gap.

[0013] Optionally, the curved surface unit is driven by the driving unit to perform linear motion.

[0014] Optionally, the ratio of the moving distance of the linear motion to the lifting distance of the height adjustment unit is constant.

[0015] Optionally, the driving unit includes a slider, the slider is slidably matched with the base, and the curved surface unit is arranged on the slider.

[0016] The driving unit further comprises a fixed part and a moving part, wherein the fixed part is fixedly arranged on the base, the moving part is arranged to move relative to the fixed part, and the sliding block is arranged on the moving part.

[0017] Optionally, the positions of the curved surface unit and the transmission unit can be interchanged.

[0018] The utility model also provides a hospital bed, comprising the above-mentioned hospital bed height adjustment device, a base and a bed board, wherein the first end of the height adjustment unit is rotatably connected to the base, and the second end of the height adjustment unit is rotatably connected to the bed board.

[0019] In the present invention, on the one hand, the drive unit is fixedly arranged relative to the base, and the entire drive unit will not move up and down or rotate with the movement of the height adjustment device, which can ensure that the cable connected to the drive unit does not move with the height adjustment device, so as to improve the damage or poor contact caused by the frequent movement of the cable, and help to increase the service life of the cable. On the other hand, the linear movement distance of the curved unit or the transmission unit maintains a linear relationship with the lifting distance of the height adjustment device, which is convenient for realizing the linear control of the position and speed of the height adjustment device, reducing the control difficulty of the height adjustment device in terms of position, speed and smoothness, and helping to ensure that the output force of the drive unit is roughly constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a hospital bed in some embodiments of the present utility model;

[0021] Figure 2It is a schematic diagram of the three-dimensional structure of the hospital bed height adjustment device in some embodiments of the utility model;

[0022] Figure 3 It is a partial structural schematic diagram of a hospital bed height adjustment device in some embodiments of the utility model;

[0023] Figure 4 It is a side view structural schematic diagram of a hospital bed height adjustment device in some embodiments of the utility model;

[0024] Figure 5 It is a motion state diagram of the hospital bed height adjustment device in some embodiments of the utility model;

[0025] Figure 6 It is a three-dimensional structural schematic diagram of a hospital bed in some embodiments of the present utility model;

[0026] Figure 7 It is a side structural schematic diagram of a hospital bed height adjustment device in some embodiments of the utility model.

[0027] The reference numerals are as follows:

[0028] 100- Bed height adjustment device;

[0029] 10- base;

[0030] 20-height adjustment unit; 21-first height adjustment unit; 22-second height adjustment unit; 201-first avoidance gap; 202-second avoidance gap;

[0031] 30- surface unit; 31- surface;

[0032] 40-transmission unit;

[0033] 50-driving unit; 51-fixed part; 52-moving part; 53-slider;

[0034] 200-bed board. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the hospital bed height adjustment device proposed by the utility model in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will be more clear. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0036] As used in the present invention, the singular forms "one", "an", and "the" include plural objects, the term "or" is usually used to include the meaning of "and / or", the term "several" is usually used to include the meaning of "at least one", and the terms "at least two" or "a plurality" are usually used to include the meaning of "two or more". In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features. In addition, as used in the present invention, "installed", "connected", "connected", and one element "set" on another element should be understood in a broad sense, usually only indicating that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements can be direct or indirect through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element can be in any orientation such as inside, outside, above, below or one side of another element, unless the content clearly indicates otherwise. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used relative to the exemplary embodiments as shown in the figures, with the upward or upper direction toward the top of the corresponding figure, and the downward or lower direction toward the bottom of the corresponding figure.

[0037] In MRI, CT and other equipment, the hospital beds are usually equipped with a lifting function, which can lift the patient from the initial position to the scanning height.

[0038] The existing height adjustment devices for hospital beds are mainly in the form of scissor-fork lifting structures and four-sided lifting structures. The driving device is arranged inside the height adjustment device to provide driving force for the mechanism. Different structures and arrangements of driving devices have different effects on the overall movement process and force of the height adjustment device.

[0039] In order to solve the above problems, the utility model provides a device for adjusting the height of a hospital bed and a hospital bed. The device for adjusting the height of a hospital bed not only ensures that the driving device is relatively fixed during the driving process, and the cable does not move with the movement of the lifting structure, but also ensures that the driving force and the driving speed change linearly during the driving process.

[0040] like Figures 1 to 5 Shown are some embodiments of the utility model.

[0041] In this embodiment, a hospital bed is provided;

[0042] The hospital bed comprises a base 10, a hospital bed height adjustment device 100 and a bed board 200. The bed board 200 is mounted on the hospital bed height adjustment device 100. The height adjustment device 100 is mounted on the base 10. The height adjustment device 100 is used to adjust the height of the hospital bed.

[0043] The hospital bed height adjustment device 100 comprises: a height adjustment unit 20, a curved surface unit 30, a transmission unit 40 and a driving unit 50;

[0044] like Figure 1 As shown, the height adjustment unit 20 includes a first height adjustment unit 21 and a second height adjustment unit 22; the first height adjustment unit 21 and the second height adjustment unit 22 are of the same length and are arranged in parallel. Figure 1 The lower end of each height adjustment unit is rotatably connected to the base 10, and the rotation center axis of the first end of each height adjustment unit extends along the width direction of the bed board 200. The second end of each height adjustment unit ( Figure 1 The upper end of each height adjustment unit is rotatably connected to the bed board 200, and the rotation center axis of the second end of each height adjustment unit also extends along the width direction of the bed board 200. Each height adjustment unit, the base 10 and the bed board 200 form a parallelogram connecting rod structure.

[0045] Please continue to refer to Figure 1 As shown, the bed board 200 is rectangular, and the second end of the height adjustment unit 20 is rotatably connected to the bed board 200. The width of the height adjustment unit 20 is substantially the same as that of the bed board 200 to provide stable support.

[0046] The driving unit 50 includes a fixed portion 51 and a movable portion 52. The movable portion 52 can move relative to the fixed portion 51. The fixed portion 51 is fixedly disposed on the base 10. The movable portion 52 is used as a driving end of the driving unit 50 to provide power for the rotation of the height adjustment unit 20.

[0047] like Figures 1 to 3 As shown, in this embodiment, the fixed part 51 is fixedly mounted on the base 10, the movable part 52 is arranged parallel to the base 10, and the base 10 is arranged horizontally. In this embodiment, the driving unit 50 adopts a structure of a rotating motor and a screw rod, and the screw rod is matched with the output shaft of the rotating motor in transmission, so the output shaft of the rotating motor and the screw rod constitute the movable part 52, and the movable part 52 performs self-rotation motion under the drive of the motor.

[0048] The driving unit 50 further includes a slider 53 . The slider 53 is disposed on the moving portion 52 . The slider 53 is slidably matched with the base 10 . The curved surface unit 30 is disposed on the slider 53 .

[0049] Please continue to refer to Figure 3 As shown, the curved surface unit 30 has a curved surface 31, wherein the curved surface unit 30 is in a rectangular slider structure as a whole, and a part of the curved surface unit 30 is cut off to form a concave curved surface 31. The slider 53 is coupled with the moving part 52 by screw thread transmission, and because the slider 53 is slidably connected to the base 10 and cannot rotate, when the screw is driven to rotate, the slider 53 can be driven to slide horizontally and linearly along the base 10.

[0050] In some other alternative embodiments, the driving unit 50 may be a linear motor, a hydraulic push rod, or other linear power elements. When the driving unit 50 is a linear motor, its motor housing and stator serve as the fixed portion 51, and its output end serves as the moving portion 52; when the driving unit 50 is a hydraulic push rod, its hydraulic housing serves as the fixed portion 51, and its push rod serves as the moving portion 52. In this case, the moving portion 52 is linearly and horizontally pushed by the driving unit 50, and the slider 53 is fixed to the moving portion 52, so that the moving portion 52 can push the slider 53 to drive the curved surface unit 30 to move horizontally and linearly.

[0051] Combination Figure 2 As shown, the transmission unit 40 is disposed on the first height adjustment unit 21 , and the transmission unit 40 contacts the curved surface 31 to convert the linear motion of the curved surface unit 30 into the rotational motion of the first height adjustment unit 21 via the curved surface 31 .

[0052] The transmission unit 40 may be designed to include a ball structure, a cylindrical roller structure, or a smooth convex structure formed by processing. The outer curved surface of the transmission unit 40 is provided to reduce the friction force when the transmission unit 40 cooperates with the curved surface 31 of the curved surface unit 30. Figure 2 As shown, in this embodiment, the transmission unit 40 is a rolling element, and the transmission unit 40 and the curved surface 31 are rollingly matched. Further, the transmission unit 40 is a cylindrical rolling element, and the outer circumferential surface of the transmission unit 40 is in line contact with the curved surface 31. Specifically, the transmission unit 40 is mounted on a rotating shaft, and the rotating shaft is mounted on the first height adjustment unit 21, so the transmission unit 40 is rotatably mounted on the first height adjustment unit 21; or the rotating unit 40 is directly rotatably mounted on the first height adjustment unit 21, so that the rotating unit 40 can rotate relative to the first height adjustment unit 21. Therefore, when the transmission unit 40 and the curved surface 31 are attached and move relative to each other, the transmission unit 40 can roll along the curved surface 31 to reduce friction. In addition, the outer circumferential surface of the transmission unit 40 is in line contact with the curved surface 31, while reducing its friction, ensuring a larger contact area between the transmission unit 40 and the curved surface 31, so as to ensure the stability of the coordinated movement of the two, and also to improve the local stress concentration phenomenon when the two interact with each other, so as to prevent the contact position of the two from being damaged due to excessive local stress.

[0053] Please continue to refer to Figure 2 As shown, the first height adjustment unit 21 is provided with a first avoidance gap 201, which is a through rectangular opening opened at the bottom of the first height adjustment unit 21, wherein the transmission unit 40 is installed on two opposite side walls of the first avoidance gap 201. The fixed portion 51 and the curved surface unit 30 are respectively located on both sides of the first height adjustment unit 21, one end of the movable portion 52 is connected to the fixed portion 51, and the other end passes through the first avoidance gap 201 and is connected to the curved surface unit 30.

[0054] Please continue to refer to Figure 2 and Figure 3 As shown in the figure, when the moving part 52 drives the curved surface unit 30 to move in the direction close to the fixed part 51, the curved surface unit 30 pushes the transmission unit 40, and the curved surface unit 30 provides a force for the transmission unit 40 through the curved surface 31. The force is perpendicular to the contact position between the curved surface 31 and the transmission unit 40. The transmission unit 40 moves relative to the curved surface 31, and the transmission unit 40 rolls obliquely upward along the curved surface 31. The transmission unit 40 drives the first height adjustment unit 21 to swing at the same time, and makes its second end ( Figure 2 The upper end of the first height adjustment unit 21 in the middle is raised, thereby driving the bed board to rise.

[0055] Please continue to refer to Figures 2 to 4 As shown, in this embodiment, the ratio of the linear moving distance of the curved surface unit 30 driven by the moving part 52 to the lifting distance of the second end of the height adjustment unit 20 is constant. At this time, the moving distance of the curved surface unit 30 and the lifting distance of the height adjustment unit 20 change linearly, and the lifting speed can be kept constant only by ensuring that the moving speed of the curved surface unit 30 is constant. The shape of the curved surface 31 can be calculated by reverse calculation based on the linear relationship between the moving distances of the curved surface unit 30 and the height adjustment unit 20.

[0056] Please refer to Figure 5As shown, since the lifting distance of the curved surface unit 30 and the height adjustment unit 20 maintains a linear relationship, the initial horizontal straight line movement distance of the curved surface unit 30 from the fixed part 52 is x, and the initial height of the second end of the height adjustment unit 20 is y. When the curved surface unit 30 is driven to move linearly at a uniform speed, assuming that its movement distance is Δx, the height change of the second end of the height adjustment unit 20 after the swing is Δy; without considering the weight of the height adjustment unit 20, the friction loss between the curved surface unit 30 and the transmission unit 40, and the friction loss of other parts, it can be known based on the conservation of kinetic energy that F1Δx≈F2Δy, where F1 is the horizontal force provided by the moving part 52 to the curved surface unit 30, and F2 is the load of the height adjustment unit 20, which is the dead weight of the bed body 200. Since F2 is a constant and Δx / Δy is a constant, F1 is also approximately a constant. Therefore, the output force of the drive unit 50 remains approximately constant, which is conducive to the selection of the drive unit 50 and the stable output characteristics.

[0057] In the above structure, on the one hand, the drive unit 50 is fixedly arranged relative to the base 10, and the entire drive unit 50 will not move up and down or rotate with the movement of the height adjustment unit, which can ensure that the cable connected to the drive unit 50 does not move with the height adjustment unit, so as to improve the damage or poor contact caused by the frequent movement of the cable, and help to increase the service life of the cable. On the other hand, the lifting distance of the curved unit 30 and the height adjustment unit 20 maintains a linear relationship, which is convenient for realizing the linear control of the position and speed of the height adjustment device, reducing the control difficulty of the height adjustment device in terms of position, speed and smoothness, and helps to ensure that the output force of the drive unit 50 is roughly constant.

[0058] In other alternative embodiments, one or more height adjustment devices 20 may be provided, and the number thereof is adjusted based on actual usage requirements.

[0059] In some other alternative embodiments, the first height adjustment unit 21 and the second height adjustment unit 22 may also be cross-arranged to form a scissor-fork type lifting structure.

[0060] Please refer to Figure 6 and Figure 7 Shown are some other embodiments of the hospital bed in the present utility model.

[0061] This embodiment and Figures 1 to 5 The difference between the embodiments in the embodiment is that the locations of the curved surface unit 30, the transmission unit 40 and the drive unit 50 are different, and the local structure of the height adjustment unit 20 is different. The locations of the curved surface unit 30 and the transmission unit 40 are interchanged (i.e., the curved surface unit 30 is arranged on the height adjustment unit 20, and the transmission unit 40 is connected to the drive unit 50). The number and arrangement of the height adjustment units 20 are consistent with the above embodiments.

[0062] Please continue to refer to Figure 6 and Figure 7 As shown, the curved surface unit 30 is a cam. A portion of the outer surface of the cam is used as a curved surface 31, so the curved surface 31 is an outward convex structure.

[0063] Please continue to refer to Figure 6 and Figure 7 As shown, the curved unit 30 is disposed on the second height adjustment unit 22 . A first avoidance notch 201 is provided on the second height adjustment unit 22 . The first avoidance notch 201 is a groove and not a through structure. The curved unit 30 is fixed to the bottom of the first avoidance notch 201 .

[0064] Please continue to refer to Figure 6 and Figure 7 As shown, the transmission unit 40 is disposed on the slider 53, and the slider 53 is threadedly matched with the moving part 52. The transmission unit 40 is still a cylindrical rolling element, so when the moving part 52 drives the slider 53 to move horizontally and linearly, the transmission unit 40 fits the curved surface 31 and provides a force to the curved surface unit 30 to drive the second height adjustment unit 22 to rotate, and the transmission unit 40 rolls relative to the curved surface 31.

[0065] Please continue to refer to Figure 6 and Figure 7 As shown, the first height adjustment unit 21 is provided with a second avoidance notch 202, which is a through groove formed on the first height adjustment unit 21. The fixing portion 51 of the driving unit 50 is mounted on the base and is located in the second avoidance notch 202.

[0066] In some other alternative embodiments, after the positions of the curved surface unit 30 and the transmission unit 40 are interchanged, the curved surface unit 30 can be set on the first height adjustment unit 21, and the transmission unit 40 can be set on the slider 53.

[0067] In some other alternative embodiments, the first avoidance notch 201 may not be provided on the second height adjustment unit 22 , and the curved surface unit 30 may also be directly provided on the second height adjustment unit 22 .

[0068] It should be noted that the above content provides several implementation methods of the hospital bed height adjustment device, and the technical features in each implementation method are not strictly independent, and the technical features in each implementation method can also be used interchangeably.

[0069] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0070] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A hospital bed height adjustment device connected to a base (10), characterized in that: include: A height adjustment unit (20), a curved surface unit (30), a transmission unit (40) and a drive unit (50); The driving unit (50) is fixedly arranged on the base (10); The curved surface unit (30) has a curved surface (31), the curved surface unit (30) is connected to the driving unit (50), the transmission unit (40) is arranged on the height adjustment unit (20), and the transmission unit (40) is in contact with the curved surface (31); The driving unit (50) comprises a fixed part (51) and a movable part (52); the fixed part (51) is fixedly arranged on the base (10); the movable part (52) is arranged to move relative to the fixed part (51); and the curved surface unit (30) is driven by the movable part (52) to perform linear motion.

2. The bed height adjustment device according to claim 1, characterized in that: The transmission unit (40) is a rolling element, and the transmission unit (40) and the curved surface (31) are in rolling cooperation; and / or the curved surface unit (30) is a cam.

3. The bed height adjustment device according to claim 1, characterized in that: The height adjustment unit (20) is provided with a first avoidance gap (201), and the transmission unit (40) is installed in the first avoidance gap (201).

4. The bed height adjustment device according to claim 3, characterized in that: At least a portion of the drive unit (50) is located in the first avoidance gap (201).

5. The bed height adjustment device according to claim 2, characterized in that: The ratio of the moving distance of the linear motion to the lifting distance of the height adjustment unit (20) is constant.

6. The bed height adjustment device according to claim 1, characterized in that: The driving unit (50) comprises a slider (53), the slider (53) is slidably matched with the base (10), and the curved surface unit (30) is arranged on the slider (53).

7. The bed height adjustment device according to claim 6, characterized in that: The slider (53) is arranged on the moving part (52).

8. The height adjustment device for a hospital bed according to any one of claims 1 to 7, characterized in that: The positions of the curved surface unit (30) and the transmission unit (40) are interchangeable.

9. A hospital bed, characterized in that: It comprises the hospital bed height adjustment device (100) according to any one of claims 1 to 8, a base (10) and a bed board (200), wherein the first end of the height adjustment unit (20) is rotatably connected to the base (10), and the second end of the height adjustment unit (20) is rotatably connected to the bed board (200).

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