Back lifting mechanism and electric sickbed

Abstract

The application relates to the technical field of medical devices, and provides a back lifting mechanism and an electric sickbed, which comprises a sickbed body, a back plate body, a driving piece, a hinged shaft, a supporting rod and a supporting wheel, the back plate body is rotatably connected to the sickbed body, the hinged shaft is rotatably connected to the sickbed body with the length direction of the hinged shaft as a rotating shaft, one end of the supporting rod is connected to the hinged shaft, the supporting wheel is rotatably connected to the other end of the supporting rod, the driving piece is connected to the supporting rod and is used for controlling the overturning of the supporting rod, one side of the back plate body is provided with a guide groove, the supporting wheel is located in the guide groove, and the supporting wheel rolls along the guide groove when the supporting rod rotates; wherein two supporting rods are symmetrically arranged, and the supporting wheels on the two supporting rods are jointly supported on the back plate body. The application has the effect of improving the supporting strength and stability after the back plate is overturned.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a back lifting mechanism and an electric hospital bed. Background Technology

[0002] Hospital beds are essential medical equipment in hospitals, and with technological advancements, many hospital beds are now electrically powered. In the overall structure of an electric hospital bed, the backrest is a key component for adjusting the patient's position.

[0003] The backrest of an electric hospital bed is an adjustable panel located at the head of the bed and is one of the core components for changing the patient's position. It is typically made of high-strength, corrosion-resistant, and easy-to-clean materials, such as high-quality stainless steel or medical-grade engineering plastics, ensuring both structural strength and compliance with the stringent hygiene requirements of hospitals. Raising the backrest provides a comfortable reclining angle when the patient needs to sit up to eat or read, or when medical staff need to perform examinations or nursing procedures. For postoperative recovery patients, adjusting the backrest angle can also reduce wound pressure, promote smooth breathing, and assist with rehabilitation training.

[0004] Currently, the backrest tilting function of electric hospital beds is mainly achieved through the mechanical linkage of gas springs, hinges, and support rods. The core principle is that the extension and retraction force of the gas springs, combined with the rotational fulcrum of the hinges and the guiding or load-bearing function of the support rods, enables the smooth raising and lowering of the backrest and angle locking. However, there is usually only one support rod, and the single-point support of the backrest may lack sufficient strength, which can affect stability and therefore needs improvement. Utility Model Content

[0005] To improve the support strength and stability after the back panel is flipped, this application provides a back lifting mechanism.

[0006] Firstly, the backrest lifting mechanism provided in this application adopts the following technical solution:

[0007] A backrest lifting mechanism includes a hospital bed body, a backrest body, a drive component, a hinge shaft, a support rod, and a support wheel. The backrest body is rotatably connected to the hospital bed body, and the hinge shaft is rotatably connected to the hospital bed body with its own length as the pivot. One end of the support rod is connected to the hinge shaft, and the support wheel is rotatably connected to the other end of the support rod.

[0008] The driving component is connected to the support rod and is used to control the rotation of the support rod; a guide groove is provided on one side of the back plate body, and the support wheel is located in the guide groove. When the support rod rotates, the support wheel rolls along the guide groove.

[0009] Two support rods are symmetrically arranged, and the support wheels on the two support rods are jointly supported on the back plate body.

[0010] By adopting the above technical solution, when it is necessary to control the backplate body to flip, the driving component operates in conjunction with the hinge shaft, thereby controlling the support rod to flip around the hinge shaft, and the support wheel supports the entire backplate body. During the lifting and lowering process of the backplate body, the support wheel always rolls within the guide groove, achieving rolling contact between the support wheel and the backplate body, reducing friction, and making the operation more stable. By setting two support rods on the hinge shaft, the two support rods jointly support the backplate body, achieving multi-point support, thereby improving the support strength and stability after the backplate is flipped.

[0011] Preferably, it further includes a first link and a second link, both of which are used to connect the two support rods, and the support rods, the first link and the second link form a triangular structure.

[0012] By adopting the above technical solution, the triangular structure has good stability. The first and second connecting rods further connect the two support rods, which can improve the support strength of the two support rods and extend their service life.

[0013] Preferably, the support rod includes an outer tube and an inner tube, the outer tube is connected to the hinge shaft, the support wheel is disposed on the inner tube, and the inner tube is detachably connected to the outer tube.

[0014] By adopting the above technical solution, the length of the support rod in existing electric hospital beds is generally fixed, which makes it inconvenient to change the length of the support rod. By setting the support rod as an outer tube and an inner tube, when it is necessary to change the overall length of the support rod, the inner tube can be disassembled and replaced with an inner tube of the appropriate length.

[0015] Preferably, the outer tube has a groove for the inner tube to be fitted onto it. After the inner tube is fitted onto the outer tube, the outer tube and the inner tube are locked together by bolts and nuts.

[0016] By adopting the above technical solution, during installation, the inner tube is first inserted inside the outer tube, and then bolts are used to simultaneously pass through both the outer and inner tubes, and tightened with nuts to complete the fixation of the outer and inner tubes. Since the outer and inner tubes are detachably connected, when it is necessary to adjust the length of the entire support rod, the inner tube can be replaced individually with one of different lengths, thereby changing the overall length of the support rod and improving its practicality.

[0017] Besides replacing the inner tube with one of different lengths, another method is to keep both the outer and inner tubes the same length. Holes are then spaced along the length of the outer tube for bolts to pass through. By changing the depth to which the inner tube is inserted into the outer tube, the length of the entire support rod is altered. Bolts are then passed through the corresponding holes and tightened with nuts.

[0018] Preferably, the support wheel is detachably connected to the inner tube.

[0019] By adopting the above technical solution, when the support wheel is damaged, the support wheel can be replaced separately, reducing maintenance costs.

[0020] Preferably, it also includes a T-shaped pin and an anti-detachment strip. A first mounting plate and a second mounting plate are connected to the inner tube. Through holes are opened on the first mounting plate, the second mounting plate and the support wheel. One end of the T-shaped pin passes through the first mounting plate, the support wheel and the second mounting plate in sequence. The anti-detachment strip is inserted into the end of the T-shaped pin near the second mounting plate and is used to prevent the T-shaped pin from falling off.

[0021] By adopting the above technical solution, during installation, the support wheel is first placed between the first mounting plate and the second mounting plate, then one end of the T-shaped pin passes through the first mounting plate, the support wheel and the second mounting plate in sequence, and then the anti-detachment strip is inserted into the end of the T-shaped pin near the second mounting plate to prevent the T-shaped pin from detaching from the inner tube.

[0022] Preferably, the driving component is an electric actuator or a gas spring, and the piston rod of the electric actuator or gas spring is hinged to the support rod.

[0023] By employing the above technical solutions, either an electric actuator or a gas spring can be used to control the rotation of the support rod. The electric actuator is connected to the support rod via a hinge point; when the actuator moves linearly, the support rod rotates around the hinge axis (similar to the lever principle). The two ends of the gas spring are connected to the support rod and the bed body respectively via hinge points; when the gas spring extends or retracts, the support rod rotates around the hinge axis.

[0024] Secondly, this application also provides an electric hospital bed, including a backrest lifting mechanism with all the above-described structures.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] (1) By setting two support rods and support wheels, the two support rods jointly support the back plate body, realizing multi-point support, thereby improving the support strength and stability after the back plate is flipped. At the same time, during the lifting and lowering of the back plate body, the support wheels will roll along the guide groove, realizing rolling friction between the support wheels and the back plate body, improving the smoothness of the lifting and lowering of the back plate body.

[0027] (2) By setting a first link and a second link, the first link and the second link further connect the two support rods together, thereby improving the support strength of the support rods and extending their service life.

[0028] (3) By setting the support wheel to be detachably connected to the support rod, the support wheel can be replaced when it is damaged, thus reducing maintenance costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the lifting mechanism in the embodiments of this application;

[0030] Figure 2 This is a schematic diagram of the structure of the back plate body after being flipped at a certain angle in an embodiment of this application;

[0031] Figure 3 This is a partial structural schematic diagram of the lifting mechanism in the embodiments of this application;

[0032] Figure 4 This is a schematic diagram of the support rod and support wheel in the embodiments of this application.

[0033] Reference numerals: 1. Bed body; 2. Backrest body; 3. Drive component; 4. Hinge shaft; 5. Support rod; 51. Outer tube; 52. Inner tube; 6. Support wheel; 7. Guide groove; 8. First connecting rod; 9. Second connecting rod; 10. First mounting plate; 11. Second mounting plate; 12. Slide bar; 13. T-shaped pin; 14. Anti-detachment strip. Detailed Implementation

[0034] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.

[0035] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0038] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.

[0039] This application discloses a backrest lifting mechanism. (Refer to...) Figures 1 to 3 The backrest lifting mechanism includes a bed body 1, a backrest body 2, a drive unit 3, a hinge shaft 4, a support rod 5, and a support wheel 6. The bed body 1 serves as a carrier for the patient to lie down and rest. The backrest body 2 is rotatably connected to the bed body 1. The hinge shaft 4 is horizontally positioned and rotatably connected to the bed body 1, with its own length serving as the pivot point. The rotation axis of the hinge shaft 4 is parallel to the rotation axis of the backrest body 2. One end of the support rod 5 is connected to the hinge shaft 4, and the support wheel 6 is rotatably connected to the other end of the support rod 5. Two parallel sliding bars 12 are fixedly connected to the side of the backrest body 2 facing the hinge shaft 4. Each sliding bar 12 has a guide groove 7 along its own length, and the support wheel 6 is located within the guide groove 7. When the support rod 5 rotates, the support wheel 6 rolls along the length of the guide groove 7.

[0040] The drive component 3 is connected to the support rod 5 and is used to control the rotation of the support rod 5. The drive component 3 is either an electric actuator or a gas spring. The piston rod of the electric actuator or the gas spring is hinged to the support rod 5, and both can be used to control the rotation of the support rod 5. The electric actuator is hinged to the support rod 5. When the piston rod of the electric actuator moves linearly, the support rod 5 rotates around the hinge axis 4 (similar to the lever principle). The two ends of the gas spring are hinged to the support rod 5 and the bed body 1, respectively. When the piston rod of the gas spring extends or retracts, the support rod 5 rotates around the hinge axis 4.

[0041] Two support rods 5 are symmetrically arranged on the hinge shaft 4, and the two support rods 5 are parallel to each other. Two parallel guide grooves 7 are provided on the back plate body 2, and the support wheels 6 on the two support rods 5 are respectively located in the two guide grooves 7, which together support the back plate body 2. In some embodiments, only one slide bar 12 can be provided at the middle position of the back plate body 2, then the number of support rods 5 and driving components 3 is also one. A single support rod 5 can also flip the back plate body 2, but the stability is not as good as two support rods 5. In practical applications, it is preferable to use two support rods 5 to support the back plate body 2.

[0042] When the backplate body 2 needs to be flipped, the drive unit 3 operates in conjunction with the hinge shaft 4, thereby controlling the support rod 5 to flip around the hinge shaft 4, and the support wheel 6 supports the entire backplate body 2. During the lifting and lowering process, the support wheel 6 always rolls within the guide groove 7, achieving rolling contact between the support wheel 6 and the backplate body 2, reducing friction and making operation more stable. By setting two support rods 5 on the hinge shaft 4, the two support rods 5 jointly support the backplate body 2, achieving multi-point support, thereby improving the support strength and stability after the backplate is flipped.

[0043] Specifically, a first connecting rod 8 and a second connecting rod 9 connect the two support rods 5. The first connecting rod 8, the second connecting rod 9, the hinge shaft 4, and the two support rods 5 together form two right-angled triangular structures. The triangular structure has good stability. The first connecting rod 8 and the second connecting rod 9 further connect the two support rods 5, which can improve the support strength of the two support rods 5, bear greater weight, and extend service life.

[0044] Combination Figure 4 In this embodiment, the support rod 5 includes an outer tube 51 and an inner tube 52, both of which are square tubes. One end of the outer tube 51 is fixedly connected to the hinge shaft 4, and the support wheel 6 is mounted on the inner tube 52. The inner tube 52 is detachably connected to the other end of the outer tube 51 away from the hinge shaft 4. A groove is provided at the end of the outer tube 51 for the inner tube 52 to be fitted. After the inner tube 52 is fitted into the groove on the outer tube 51, a bolt is used to pass through both the outer tube 51 and the inner tube 52 and lock them together with a nut to fix the outer tube 51 and the inner tube 52.

[0045] The length of the support rod 5 has a certain impact on the tilt angle range of the backrest. However, the length of the support rod 5 in existing electric hospital beds is generally fixed, making it inconvenient to change its length. By configuring the support rod 5 as an outer tube 51 and an inner tube 52, when it is necessary to change the overall length of the support rod 5, the inner tube 52 can be replaced with one of appropriate length, thereby changing the overall length of the support rod 5 and improving its practicality.

[0046] Furthermore, the support wheel 6 is detachably connected to the inner tube 52. If the support wheel 6 is damaged, it can be replaced individually, reducing maintenance costs. A first mounting plate 10 and a second mounting plate 11 are fixedly connected to the inner tube 52, and the first mounting plate 10 and the second mounting plate 11 are parallel to each other. Through holes are provided on the first mounting plate 10, the second mounting plate 11, and the support wheel 6. One end of the T-shaped pin 13 passes through the first mounting plate 10, the support wheel 6, and the second mounting plate 11 in sequence. An anti-detachment strip 14 is inserted into the end of the T-shaped pin 13 near the second mounting plate 11 and is used to prevent the T-shaped pin 13 from falling off. The anti-detachment strip 14 is made of metal and has flexibility and deformation capabilities.

[0047] During installation, first place the support wheel 6 between the first mounting plate 10 and the second mounting plate 11. Then, pass one end of the T-shaped pin 13 through the first mounting plate 10, the support wheel 6, and the second mounting plate 11 in sequence. Next, insert the anti-detachment strip 14 onto the end of the T-shaped pin 13 near the second mounting plate 11 to prevent the T-shaped pin 13 from detaching from the inner tube 52. During disassembly, first pull the anti-detachment strip 14 off the T-shaped pin 13, and then pull out the T-shaped pin 13 to facilitate subsequent disassembly of the support wheel 6.

[0048] The implementation principle of the backrest lifting mechanism in this embodiment is as follows: When it is necessary to control the backrest body 2 to flip, the drive component 3 operates in conjunction with the hinge shaft 4, thereby controlling the support rod 5 to flip around the hinge shaft 4, and the support wheel 6 supports the entire backrest body 2. During the lifting process, the support wheel 6 always rolls within the guide groove 7, achieving rolling contact between the support wheel 6 and the backrest body 2, reducing friction, and making the operation more stable.

[0049] Based on the above embodiments, this application also provides an electric hospital bed, which includes a back lifting mechanism with all the above structures. Since the back lifting mechanism has been discussed in detail above, it will not be repeated here.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A backrest lifting mechanism, characterized in that, The device includes a bed body (1), a backrest body (2), a drive unit (3), a hinge shaft (4), a support rod (5), and a support wheel (6). The backrest body (2) is rotatably connected to the bed body (1), and the hinge shaft (4) is rotatably connected to the bed body (1) with its own length as the pivot. One end of the support rod (5) is connected to the hinge shaft (4), and the support wheel (6) is rotatably connected to the other end of the support rod (5). The driving component (3) is connected to the support rod (5) and is used to control the support rod (5) to flip; a guide groove (7) is provided on one side of the back plate body (2), and the support wheel (6) is located in the guide groove (7). When the support rod (5) rotates, the support wheel (6) rolls along the guide groove (7); Among them, two support rods (5) are symmetrically arranged, and the support wheels (6) on the two support rods (5) are supported together on the back plate body (2).

2. The back lifting mechanism according to claim 1, characterized in that, It also includes a first link (8) and a second link (9), both of which are used to connect the two support rods (5), and the support rods (5), the first link (8) and the second link (9) form a triangular structure.

3. The backrest lifting mechanism according to claim 1, characterized in that, The support rod (5) includes an outer tube (51) and an inner tube (52). The outer tube (51) is connected to the hinge shaft (4). The support wheel (6) is located on the inner tube (52). The inner tube (52) is detachably connected to the outer tube (51).

4. A backrest lifting mechanism according to claim 3, characterized in that, The outer tube (51) has a groove for the inner tube (52) to be fitted. When the inner tube (52) is fitted onto the outer tube (51), the outer tube (51) and the inner tube (52) are locked together by bolts and nuts.

5. A backrest lifting mechanism according to claim 3, characterized in that, The support wheel (6) is detachably connected to the inner tube (52).

6. A backrest lifting mechanism according to claim 5, characterized in that, It also includes a T-shaped pin (13) and an anti-detachment strip (14). The inner tube (52) is connected to a first mounting plate (10) and a second mounting plate (11). The first mounting plate (10), the second mounting plate (11) and the support wheel (6) are all provided with through holes. One end of the T-shaped pin (13) passes through the first mounting plate (10), the support wheel (6) and the second mounting plate (11) in sequence. The anti-detachment strip (14) is inserted on the end of the T-shaped pin (13) near the second mounting plate (11) and is used to restrict the T-shaped pin (13) from falling off.

7. A backrest lifting mechanism according to claim 1, characterized in that, The driving component (3) is an electric actuator or a gas spring, and the piston rod of the electric actuator or gas spring is hinged to the support rod (5).

8. An electric hospital bed, characterized in that, Includes the back lifting mechanism as described in any one of claims 1 to 7.

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