A hospital bed
By incorporating a primary vibration damping structure at the omnidirectional casters of the hospital bed and a secondary vibration damping structure under the bed board, combined with a weighing system, the vibration problem during bed movement is solved, achieving flexible vibration control and patient safety protection. It can also be deactivated as needed and is suitable for hospitals and other similar locations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANYANG XIANGYU MEDICAL EQUIP
- Filing Date
- 2023-07-24
- Publication Date
- 2026-07-31
AI Technical Summary
Existing hospital beds lack vibration damping during movement, which can easily cause secondary injuries to patients. Furthermore, the vibration damping structure is simple, easily damaged, and cannot be disabled when not needed.
A hospital bed was designed that employs a primary vibration damping structure at the omnidirectional casters and a secondary vibration damping structure under the bed board, combined with a weighing system, to achieve flexible control of the vibration damping function through the primary and secondary vibration damping failure components.
It achieves effective vibration reduction during bed movement, protecting patient safety, and can also fail when vibration reduction is not needed, providing a stable bed environment and enabling real-time monitoring of patient weight changes.
Smart Images
Figure CN116983152B_ABST
Abstract
Description
Technical Field
[0001] This invention specifically relates to a hospital bed and belongs to the field of medical equipment technology. Background Technology
[0002] Hospital beds, also known as medical beds or nursing beds, are beds used for patients to sit or lie down during treatment, transfer, and recuperation. They are mainly used in major hospitals, township health centers, and community service centers. Most existing hospital beds have limited functions and lack vibration damping capabilities. During bed movement, this can easily cause secondary injuries to patients and fails to adequately meet their needs. For example, when a patient completes treatment and needs to be transferred from the treatment room to the rehabilitation room, or from the inpatient ward to the radiology room for X-rays, the lack of vibration damping in existing beds can cause vibrations due to uneven roads, slopes, or gaps in elevators, affecting wound healing and potentially causing secondary injuries. Although some existing hospital beds incorporate vibration damping structures, these structures are often simple, easily damaged, and lack the ability to disable or disable the damping function once the bed is fixed and no longer needed. Summary of the Invention
[0003] In view of the problems existing in the prior art, the present invention provides a hospital bed that solves the problem that the lack of vibration damping function of existing hospital beds can easily cause secondary injury to patients during transfer, and also solves the problem that the vibration damping function cannot be disabled.
[0004] The technical solution of the present invention is as follows: A hospital bed includes a base frame with a swivel caster installed at each of the four corners. The swivel casters are connected to the base frame via a primary vibration damping structure, and a primary vibration damping failure component is also provided on the primary vibration damping structure. A column is fixedly installed on the base frame, and a bed frame is fixedly connected to the column. The bed frame includes a lower bed frame and an upper bed frame, and the lower bed frame and the upper bed frame are connected via a secondary vibration damping structure and a secondary vibration damping failure component.
[0005] Furthermore, the primary vibration damping structure includes a fixed plate, on which two parallel and spaced vertical plates are fixedly connected. Rotation holes and arc-shaped slots are provided at the lower part of the vertical plates. A first shaft is provided at the upper part of the vertical plates. Two horizontal beams are provided parallel and spaced between the two vertical plates. The horizontal beams are rotatably connected to the vertical plates via a rotating shaft, which passes through the rotation holes on the horizontal beams and vertical plates. A second, third, and fourth shaft are also provided on the two horizontal beams. The second and third shafts are located on the same side of the rotating shaft, with the second shaft located outside the third shaft. The fourth shaft is located on the other side of the rotating shaft and passes through the arc-shaped slots on the horizontal beams and vertical plates. A first vibration damping assembly is provided between the third and first shafts. A swivel caster is installed on the second shaft.
[0006] Furthermore, the first vibration damping component includes a guide rod disposed on the third shaft and a guide sleeve disposed on the first shaft. The upper end of the guide rod is inserted into the guide sleeve. A first spring is also sleeved outside the guide rod and the guide sleeve. The upper end of the first spring is fixedly connected to the guide sleeve, and the lower end of the first spring is fixedly connected to the guide rod.
[0007] Furthermore, the primary vibration damping and failure assembly includes a horizontal cover plate fixedly mounted on the upper surface of the two vertical plates. A threaded hole is provided on the cover plate, and a vertical screw rod passes through the threaded hole. A handwheel is provided at the upper end of the screw rod, which can drive the rotation of the screw rod. A top plate is provided below the screw rod, and the top plate is located directly above the fourth axis. When the screw rod descends, it can drive the top plate to descend, thereby blocking the fourth axis and preventing the crossbeam plate from rotating around the rotation axis.
[0008] Furthermore, a second vibration damping assembly is provided between the cover plate and the fourth shaft. The second vibration damping assembly includes a chassis mounted on the fourth shaft, with a certain distance between the chassis and the top plate. A second spring is sleeved around the chassis, the top plate, and the screw. The upper end of the second spring is fixedly connected to the cover plate, and the lower end of the second spring is fixedly connected to the chassis.
[0009] Furthermore, the secondary vibration reduction structure includes two dampers, with the upper part of the damper fixedly connected to the upper bed frame and the lower part of the damper fixedly connected to the lower bed frame.
[0010] Furthermore, the secondary vibration damping and disabling component includes four set screw assemblies, the upper part of each set screw assembly is fixedly connected to the upper bed frame, the lower part of each set screw assembly is fixedly connected to the lower bed frame, and the set screw assembly also includes a handle.
[0011] Furthermore, the base frame includes an outer base frame and an inner base frame, with the inner base frame located inside the outer base frame. The outer base frame and the inner base frame are connected by four weighing sensors, and the uprights are fixedly connected to the inner base frame.
[0012] Furthermore, a protective cover is also provided on the base frame, through which the column and screw pass, and the handwheel is located above the protective cover.
[0013] Furthermore, a bed board and a headboard are also provided on the upper bed frame, and a weighing panel is provided at one end of the lower bed frame.
[0014] Beneficial Effects: This patent provides a hospital bed with vibration damping function. The casters are equipped with a primary vibration damping structure, and the bed board has a secondary vibration damping structure, achieving a dual vibration damping effect. Simultaneously, the primary vibration damping structure can be disabled by a primary vibration damping failure component, and the secondary vibration damping structure can be disabled by a secondary vibration damping failure component. When the bed remains stationary, the vibration-damped and disabled hospital bed provides a more stable bed for the patient. Finally, the hospital bed also includes a weighing system, which can monitor and record the patient's weight in real time, facilitating the observation of the condition of long-term hospitalized patients. Furthermore, doctors can assess the patient's condition based on weight changes and adjust medication dosages accordingly. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a hospital bed.
[0016] Figure 2 Figure 1 The right view.
[0017] Figure 3 for Figure 1 A diagram showing the hidden protective cover, bed board, and headboard.
[0018] Figure 4 for Figure 3 Front view.
[0019] Figure 5 for Figure 4 Sectional view of AA.
[0020] Figure 6 This is a schematic diagram of the set screw assembly.
[0021] Figure 7 for Figure 6 A sectional view.
[0022] Figure 8 This is a schematic diagram of the base frame structure.
[0023] Figure 9 This is a schematic diagram of the caster and the primary vibration damping structure.
[0024] Figure 10 for Figure 9 A partial schematic diagram of the primary vibration reduction structure.
[0025] Figure 11 for Figure 10 Perspective view.
[0026] Figure 12 for Figure 11 A schematic diagram showing the hidden spring.
[0027] Marked in the image: 1. Base frame; 11. Outer base frame; 12. Inner base frame; 13. Load cell; 14. Upright column; 15. Protective cover; 16. Universal casters; 16.1 Caster axle; 2. Lower bed frame; 21. Weighing panel; 22. Damper; 23. Set screw assembly; 24. Lower support plate; 231. Lead screw; 232. Wrench; 233. Nut sleeve; 234. First linear bearing; 235. Third spring; 236. Guide rod; 237. Second linear bearing; 3. Upper bed frame; 31. Bed board. 32 Headboard, 33 Upper support plate, 4 Primary vibration damping structure, 41 Fixed plate, 42 Vertical plate, 421 First pin, 422 Rotating hole, 423 Arc-shaped slot, 43 Crossbeam plate, 432 Second pin, 433 Third pin, 434 Fourth pin, 435 Rotating shaft, 44 Cover plate, 441 Screw, 442 Handwheel, 443 Top plate, 45 First spring, 451 Guide rod, 452 Guide sleeve, 46 Second spring, 461 Base plate. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] A type of hospital bed, such as Figure 1-4 As shown, the bed includes a base frame 1, with a set of vibration-damping casters with foot brakes installed at each of the four corners to facilitate the movement and stopping of the bed. Each set of vibration-damping casters includes a swivel caster 16 and a primary vibration-damping structure 4. The swivel caster 16 is connected to the base frame 1 via the primary vibration-damping structure 4. A primary vibration-damping disabling component is also provided on the primary vibration-damping structure, which can disable the vibration-damping function of the primary vibration-damping structure. Two columns 14 are fixedly installed parallel to each other on the base frame 1, and a bed frame is fixedly connected to the columns 14. The bed frame includes a lower bed frame 2 and an upper bed frame 3, which are connected to each other via a secondary vibration-damping structure and a secondary vibration-damping disabling component. A bed board 31 is also laid flat on the upper surface of the upper bed frame 3 for the patient to lie down, and headboards 32 are provided at both ends of the upper bed frame 3.
[0030] like Figure 8As shown, the base frame 1 includes an outer base frame 11 and an inner base frame 12. The inner base frame 12 is generally rectangular, and the outer base frame 11 is also roughly rectangular, except that its four corners are chamfered. Four vibration-damping casters are installed on its chamfered parts. The inner base frame 12 is located inside the outer base frame 11, with a certain distance between them. The outer base frame 11 and the inner base frame 12 are connected by four weighing sensors 13. The uprights 14 are fixedly connected to the inner base frame 12. In this way, the weight of the bed frame, the patient on the bed frame, the uprights, and the inner base frame are all loaded onto the weighing sensors. A weighing panel 21 is also provided at one end of the lower bed frame 2. The weighing panel 21 is electrically connected to the weighing sensors 13. The deformation of the weighing sensors can be converted into the weight they bear, and thus displayed on the weighing panel. At the same time, in order to protect the sensors and the primary vibration-damping structure, a protective cover 15 (see...) is also provided on the base frame 1. Figure 1 The column 14 passes through the protective cover 15, and the swivel casters 16 are exposed outside the protective cover 15. Using this weighing system on the hospital bed, the patient's weight can be viewed and recorded in real time, facilitating the observation of the condition of long-term hospitalized patients. At the same time, doctors can assess the patient's condition based on weight changes and adjust medication dosages accordingly.
[0031] Specifically, each set of vibration-damping casters on the base frame includes a swivel caster 16 and a primary vibration-damping structure 4, such as... Figure 9-12 As shown, the primary vibration damping structure includes a fixed plate 41, which is fixedly connected to the chamfered part on the base frame. Two parallel and spaced vertical plates 42 are fixedly connected to the side of the fixed plate 41. A rotating hole 422 and an arc-shaped slot 423 are provided at the lower part of the vertical plate 42. The center of the arc-shaped slot and the center of the rotating hole are at the same height on the vertical plate, and the center of the arc edge of the arc-shaped slot coincides with the center of the rotating hole. A first pin 421 is provided on the upper part of the vertical plate 42. Two horizontal beam plates 43 are arranged parallel to each other between the two vertical plates. The horizontal beam plates 43 and the vertical plates 42 are rotatably connected by a rotating shaft 435. The rotating shaft 435 passes through the rotating holes 422 on the horizontal beam plates 43 and the vertical plates. A second pin 432, a third pin 433 and a fourth pin 434 are also provided on the two horizontal beam plates 43. The second pin 432 and the third pin 433 are located on the same side of the rotating shaft 435. The second pin 432 is located outside the third pin 433. The fourth pin 434 is located on the other side of the rotating shaft 435. The fourth pin 434 passes through the arc-shaped slots 423 on the horizontal beam plates 43 and the vertical plates. In this way, the horizontal beam plates can rotate around the rotating shaft, and the range of rotation angle is limited by the arc-shaped slots. A first damping assembly is provided between the third pin 433 and the first pin 421, and a swivel caster 16 is installed on the second pin 432. The caster axle 161 of the swivel caster is fixedly connected to the second small axle 432.
[0032] The first vibration damping component includes a guide rod 451 disposed on the third pin 433 and a guide sleeve 452 disposed on the first pin 421. The upper end of the guide rod 451 is inserted into the guide sleeve 452. A first spring 45 is also sleeved on the outside of the guide rod 451 and the guide sleeve 452. The upper end of the first spring 45 is fixedly connected to the guide sleeve 452, and the lower end of the first spring 45 is fixedly connected to the guide rod 451. The primary vibration damping and failure assembly includes a horizontal cover plate 44 fixedly mounted on the upper surface of two vertical plates 42. A threaded hole is provided on the cover plate 44, and a vertical screw 441 passes through the threaded hole. The upper part of the screw freely passes through the protective cover 15. A handwheel 442 is provided at the upper end of the screw 441, which is located above the protective cover. The handwheel 442 can drive the rotation of the screw 441. A top plate 443 is provided below the screw 441, which is located directly above the fourth pin 434. When the screw descends, it can drive the top plate to descend, thereby blocking the fourth pin and preventing the crossbeam plate from rotating around the rotation axis. A second vibration damping assembly is also provided between the cover plate 44 and the fourth pin 434. The second vibration damping assembly includes a chassis 461 mounted on the fourth pin, with the chassis 461 and the top plate 443 spaced apart by a certain distance. A second spring 46 is sleeved around the chassis 461, the top plate 443, and the screw 44. The upper end of the second spring 46 is fixedly connected to the cover plate 44, and the lower end of the second spring 46 is fixedly connected to the chassis 461. The first spring 45 and the second spring 46 are located on opposite sides of the rotating shaft 435.
[0033] In its free state, the swivel casters 16 are on the ground, and the crossbeam plate 43 is kept horizontal by the constraint of both the first spring 45 and the second spring 46. When the ground is uneven, the swivel casters drive the crossbeam plate 43 to rotate around the rotation axis 435, thereby raising or lowering the left and right ends of the crossbeam plate 43. At this time, the first and second damping components in the primary damping structure simultaneously play a damping role. Specifically, when the first spring 45 is compressed, the second spring 46 is stretched, or when the first spring 45 is stretched, the second spring 46 is compressed. The cooperation between the guide rod 451 and the guide sleeve 452 improves the stability of the mechanism. Because the compression and tension characteristics of the two springs are used simultaneously for damping, the damping effect is significantly improved. This design ensures the reliability and lifespan of the caster's vibration damping. When the handwheel 442 is rotated clockwise to lower the screw 441, it lowers the top plate 443. The large areas of the base plate 461 and the top plate 443 facilitate mutual contact when they approach each other. Once the top plate 443 presses against the base plate 461, causing the fourth pin 434 to reach the bottom of the arc-shaped slot 423, the first and second vibration damping components in the primary vibration damping structure simultaneously fail. At this point, the crossbeam plate 43 is restricted and can no longer rotate, thus disabling the vibration damping function of the caster. This design is suitable for situations where vibration damping is no longer required. In actual operation, the vibration damping function of all four casters must be completely disabled to achieve stability of the base frame.
[0034] As mentioned earlier, a secondary vibration damping structure and a secondary vibration damping failure component are also installed between the lower bed frame 2 and the upper bed frame 3. For example... Figure 3-5 As shown, the secondary vibration damping structure includes two dampers 22 arranged side-by-side and separated. The upper part of the damper 22 is fixedly connected to the upper bed frame 3, and the lower part of the damper 22 is fixedly connected to the lower bed frame 2. When the upper bed frame 3 is compressed, the damper is compressed, playing a buffering role and achieving a secondary vibration damping effect. The secondary vibration damping failure assembly includes four set screw assemblies 23 located at the four corners of the bed frame. The upper part of each set screw assembly is fixedly connected to the upper bed frame 3 via an upper support plate 33, and the lower part of the set screw assembly is fixedly connected to the lower bed frame 2 via a lower support plate 24. Figure 6-7 As shown, the structure of the set screw assembly includes a lead screw 231, a nut sleeve 233, a first linear bearing 234, a third spring 235, a guide rod 236, a second linear bearing 237, etc. A wrench 232 is also provided at the lower end of the lead screw 231. The first linear bearing 234 is located inside the nut sleeve 233. Both the first linear bearing 234 and the nut sleeve 233 are fixedly connected to the lower support plate 24. The lead screw 231 passes through the nut sleeve 233 and the first linear bearing 234 from bottom to top. The lead screw 231 and the nut sleeve 233 are connected by a thread. The upper part of the lead screw 231 freely passes through the first linear bearing 234. The large end of the guide rod 236 and the large end of the second linear bearing 237 clamp the upper support plate 33 and are fixedly connected to it. The guide rod portion of the guide rod 236 passes through the upper support plate 33 and the second linear bearing 237 sequentially from top to bottom. The second linear bearing 237 and the first linear bearing 234 are coaxially aligned in the vertical direction, thus aligning the lead screw 231 and the guide rod 236 in the vertical direction as well. A third spring 235 is also sleeved between the first linear bearing 234 and the second linear bearing 237. In the natural state where the secondary vibration damping structure damper is functioning, the lead screw 231 and the guide rod 236 are spaced a certain distance apart. When the secondary vibration damping function is no longer needed, the wrench 232 can be turned to rotate the lead screw 231 relative to the nut sleeve 233 and raise it. Continuing to rotate, the lead screw 231 will lift the guide screw 236, which in turn will lift the upper support plate 33 and the upper bed frame 3, thus relieving the damper 22 of pressure and rendering it ineffective for secondary vibration damping. In actual operation, all four set screw assemblies need to be raised to suspend the upper bed frame.
[0035] This hospital bed features a primary vibration damping structure at each of its four casters. When moving the bed, under normal conditions, the casters bear the force on the ground. When encountering bumps, the compression and extension of the springs significantly reduce the vibration transmitted to the bed. Combined with secondary damping, this minimizes vibration to the patient. The primary and secondary vibration damping functions are independent and can be used flexibly together. When the bed is fixed in place and the vibration damping function is no longer needed, the primary and / or secondary vibration damping functions can be manually activated to provide the patient with a more stable bed.
[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.
Claims
1. A sickbed comprising a chassis, a universal caster wheel is installed at each corner of the chassis, characterized in that: The omnidirectional casters are connected to the base frame via a primary vibration damping structure, which includes a first vibration damping component and a second vibration damping component. A primary vibration damping failure component is also provided on the primary vibration damping structure. A column is fixedly installed on the base frame, and a bed frame is fixedly connected to the column. The bed frame includes a lower bed frame and an upper bed frame, which are connected to each other via a secondary vibration damping structure and a secondary vibration damping failure component. The primary vibration damping structure includes a fixed plate, two parallel and spaced vertical plates fixedly connected to the side of the fixed plate, a rotating hole and an arc-shaped slot at the bottom of the vertical plates, a first shaft at the top of the vertical plates, two parallel and spaced horizontal beams between the two vertical plates, and the horizontal beams and vertical plates are rotatably connected by a rotating shaft passing through the rotating holes on the horizontal beams and vertical plates. A second shaft, a third shaft and a fourth shaft are also provided on the two horizontal beams. The second shaft and the third shaft are located on the same side of the rotating shaft, the second shaft is located outside the third shaft, and the fourth shaft is located on the other side of the rotating shaft, passing through the arc-shaped slots on the horizontal beams and vertical plates. The first vibration damping component is located between the third shaft and the first shaft, and a swivel caster is installed on the second shaft. The first vibration damping component includes a guide rod disposed on a third shaft and a guide sleeve disposed on a first shaft. The upper end of the guide rod is inserted into the guide sleeve. A first spring is also sleeved outside the guide rod and the guide sleeve. The upper end of the first spring is fixedly connected to the guide sleeve, and the lower end of the first spring is fixedly connected to the guide rod. The primary vibration damping and failure assembly includes a horizontal cover plate fixedly mounted on the upper surface of two vertical plates. A threaded hole is provided on the cover plate, and a vertical screw rod passes through the threaded hole. A handwheel is provided at the upper end of the screw rod, which can drive the rotation of the screw rod. A top plate is provided below the screw rod, and the top plate is located directly above the fourth axis. When the screw rod descends, it can drive the top plate to descend, thereby blocking the fourth axis and preventing the crossbeam plate from rotating around the rotation axis.
2. A hospital bed according to claim 1, wherein, The second vibration damping component is disposed between the cover plate and the fourth shaft. The second vibration damping component includes a chassis disposed on the fourth shaft. The chassis and the top plate are spaced a certain distance apart. A second spring is sleeved around the chassis, the top plate and the screw. The upper end of the second spring is fixedly connected to the cover plate and the lower end of the second spring is fixedly connected to the chassis.
3. A hospital bed according to claim 1, wherein, The secondary vibration reduction structure includes two dampers. The upper part of the damper is fixedly connected to the upper bed frame, and the lower part of the damper is fixedly connected to the lower bed frame.
4. A hospital bed according to claim 1, wherein, The secondary vibration damping and disabling assembly includes four set screw assemblies. The upper part of each set screw assembly is fixedly connected to the upper bed frame, and the lower part of each set screw assembly is fixedly connected to the lower bed frame. Each set screw assembly also includes a handle.
5. A hospital bed according to claim 1, wherein, The base frame includes an outer base frame and an inner base frame. The inner base frame is located inside the outer base frame. The outer base frame and the inner base frame are connected by four weighing sensors. The column is fixedly connected to the inner base frame.
6. A hospital bed according to claim 1 wherein, A protective cover is also installed on the base frame, through which the column and screw pass, and the handwheel is located above the protective cover.
7. A hospital bed according to claim 1 wherein, The upper bed frame is also equipped with a bed board and a headboard, and a weighing panel is also provided at one end of the lower bed frame.