Bedsore fluctuation prevention device for nursing bed

Abstract

The invention discloses a bedsore fluctuation preventing device for a nursing bed, and relates to the technical field of nursing equipment, the bedsore fluctuation preventing device comprises a transmission assembly and two driving assemblies; the transmission assembly comprises a plurality of transmission units, and the transmission units are arranged on the bed board; the transmission unit comprises a seat body and a movable part; a plurality of mounting grooves are formed in the bed board in a penetrating manner, and the movable part is movably connected with the seat body; the driving assembly comprises a frame body, a driving piece and a plurality of contact pieces; the driving piece is used for driving the frame body to move; the contact piece is arranged at the top of the frame body, and the top of the contact piece is used for being in contact with the bottom of the movable piece; and the two driving parts drive the corresponding frame bodies to move in opposite directions and synchronously. The anti-bedsore nursing bed can effectively achieve the anti-bedsore effect, meanwhile, the comfort degree of a patient lying in bed on the nursing bed can be improved, and rehabilitation of the patient is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nursing equipment, in particular to a nursing bed anti-bedsores fluctuation device. BACKGROUND

[0002] The nursing bed is a medical auxiliary device specially designed for patients who are inconvenient to move, long-term bedridden or need rehabilitation care, has many functions that ordinary beds do not have, and aims to improve patient comfort and reduce the burden on nursing staff. In order to improve the comfort of patients on the bed, a elastic pad is usually laid on the surface of the bed body to improve comfort and also has a certain effect of preventing bedsores.

[0003] However, long-term bedridden patients still face the problem of continuous pressure on local limbs, and if the limbs are subjected to pressure for a long time, tissue hypoxia will cause bedsores.

[0004] Therefore, the nursing bed on the market can realize various functions, including back raising, turning over, leg bending and other actions, and laying an elastic pad on the surface of the bed body can also achieve the purpose of preventing bedsores. Although this nursing function is good, the effect of preventing bedsores is obviously not good, and the elastic pad is easy to deviate and has a short service life. SUMMARY

[0005] The present application provides a nursing bed anti-bedsores fluctuation device, which can effectively prevent bedsores and improve the comfort of patients on the nursing bed, which is helpful for patient recovery.

[0006] The present application provides a nursing bed anti-bedsores fluctuation device, which adopts the following technical scheme: A nursing bed anti-bedsores fluctuation device is arranged on a nursing bed, the nursing bed comprises a bed body and a base; the bed body comprises a bed plate and an enclosure structure, and the enclosure structure is arranged around the edge of the bed plate; the fluctuation device comprises a transmission assembly and two driving assemblies; The transmission assembly comprises a plurality of transmission units, and the transmission units are arranged on the bed plate; The transmission unit comprises a seat body and a movable piece; A plurality of installation grooves for arranging the seat body are provided through the bed plate, the movable piece is movably connected with the seat body, the moving direction of the movable piece is perpendicular to the bed plate, and the movable piece passes through the seat body during movement; The driving assembly comprises a frame body, a driving piece and a plurality of contact pieces; the driving piece is arranged on the base and is used to drive the frame body to move vertically relative to the base; the contact pieces are arranged on the top of the frame body, and the top of the contact pieces is used to contact the bottom of the movable piece; The driving members drive the multiple movable members to move upward during the process that the frame bodies move upward to the limit position, and the two driving members drive the corresponding frame bodies to move in opposite and synchronous directions; The wave device further comprises a mattress; The mattress comprises multiple elastic pads with elasticity, which are arranged on the top of the bed plate, and the multiple elastic pads are distributed on the surface of the bed plate and along the length direction of the bed plate at equal intervals; The mattress is connected with the bed plate through the multiple transmission units, and the bottom of the elastic pad is connected with the top of the movable member; The transmission unit further comprises a first elastic member; The two ends of the first elastic member are connected with the seat body and the movable member respectively, and the first elastic member has a tendency to drive the movable member to move downward to the limit position and remain; The mattress further comprises a soft and elastic cover body; The cover body comprises multiple fitting parts and multiple connecting parts, and the connecting parts are formed between adjacent fitting parts; the multiple fitting parts correspond to the multiple elastic pads one by one, the fitting parts are matched with the elastic pads, and the fitting parts are sleeved with the elastic pads; when the multiple fitting parts are sleeved on the multiple elastic pads respectively, the connecting parts are bent towards the bed plate and located between adjacent elastic pads.

[0007] By adopting the above technical scheme, during the operation of the wave device, the multiple movable members can move up and down regularly, so that the wave device directly acts on the mattress to move in a wave-like manner, so that the body of the patient in bed can be stretched and moved for a long time, effectively promoting blood circulation and improving muscle activity, while reducing the discomfort of the patient during the process, effectively preventing bedsores and improving the comfort of the patient on the nursing bed, which is helpful for the recovery of the patient. In addition, the transmission unit can speed up the recovery of the elastic pad after being raised upward, while effectively reducing the probability of the movable member being stuck relative to the seat body after being moved upward, improving the wave effect and stability of the wave device. In addition, it can reduce the probability of the elastic pad being directly exposed and damaged, and reduce the probability of the elastic pad being directly contaminated, thereby effectively prolonging the service life of the mattress. Furthermore, it can reduce the gap between adjacent elastic pads, thereby reducing the discomfort of the patient in bed caused by the gap, and further reducing the probability of the patient's skin being stuck in the gap to aggravate bedsores or cause pain.

[0008] Optionally, the transmission assembly further comprises multiple tensioning units, which are located between adjacent elastic pads and are used for tensioning the cover body; The tensioning unit comprises a tensioning roller and a plurality of second elastic members; The tensioning roller is movably connected with the bed board and rotationally connected with the bed board, the moving direction of the tensioning roller is parallel to the moving direction of the moving member, the rotation axis of the tensioning roller coincides with the axis of the tensioning roller and is parallel to the width direction of the bed board; The two ends of the second elastic member are connected with the bed board and the tensioning roller respectively, and the second elastic member has a tendency to drive the tensioning roller to move to the limit position close to the bed board and to keep the tensioning roller in contact with the corresponding connecting part.

[0009] By using the above technical scheme, the flatness of the top surface of the mattress can be improved to reduce the probability of wrinkles, and the gap between adjacent elastic pads can be further reduced, thereby further reducing the discomfort of the patient on the bed caused by the wrinkles and the gap on the top surface of the mattress.

[0010] Optionally, the tensioning unit further comprises an air cushion and an air valve; The air cushion has a ring structure and is sleeved and fixed on the outer side of the tensioning roller, and is used to directly contact the corresponding connecting part. The air valve is arranged on one side of the air cushion and is used to control the expansion and contraction of the air cushion.

[0011] By using the above technical scheme, the tensioning effect of the tensioning unit on the sleeve body of different sizes can be effectively ensured, and the damage to the sleeve body during the tensioning process of the tensioning unit can be effectively reduced.

[0012] Optionally, the elastic pad has a closed air cavity in the interior, and the air cavity is filled with gas.

[0013] By using the above technical scheme, the comfort of the patient on the bed can be further improved, and the gap between adjacent elastic pads can be further reduced after the elastic pad is deformed under pressure, thereby further reducing the discomfort of the patient on the bed caused by the gap.

[0014] Optionally, the transmission unit further comprises a flexible spacer; The spacer is arranged on the top of the seat body and between the elastic pad and the moving member; when the moving member moves downward to the limit position, the spacer is bent and deformed in the direction close to the moving member under the action of the elastic pad and maintains a distance with the moving member; when the moving member moves upward to the limit position, the spacer is bent and deformed in the direction close to the elastic pad under the action of the moving member and drives the elastic pad to expand.

[0015] By adopting the technical scheme, the movable part can avoid directly contacting the elastic pad, thereby effectively prolonging the service life of the elastic pad.

[0016] Optionally, the transmission unit further comprises two sliding members and a plurality of third elastic members. The sliding members are in sliding connection with the top of the seat body, and the sliding direction of the sliding members is parallel to the length direction of the bed board; the partition plate is arranged between the two sliding members, and the two ends of the partition plate are connected with the two sliding members, respectively. The two ends of the third elastic members are connected with the sliding members and the seat body, respectively, and the third elastic members have a tendency to drive the sliding members to slide away from the adjacent partition plate.

[0017] By adopting the technical scheme, the bending deformation of the partition plate during the bending deformation under external force is more regular, thereby effectively prolonging the service life of the partition plate.

[0018] Optionally, the transmission unit further comprises two limiting members, and the two limiting members correspond to the two sliding members, respectively; the limiting members are arranged on the top of the sliding members. The two sides of the bottom of the elastic pad are provided with positioning grooves matched with the limiting members, and the bottom of the elastic pad is clamped between the two limiting members to limit the expansion.

[0019] By adopting the technical scheme, the deformation area of the elastic pad can be limited, so that the elastic deformation of the elastic pad mainly occurs at the top position, thereby enabling the top of the elastic pad to also protrude outward when the elastic pad protrudes, further preventing the skin of a patient lying on the bed from being clamped into the gap between the two elastic pads at this time, and further improving the anti-bedsores effect of the fluctuation device.

[0020] Optionally, the bed board is divided into a head region, a body region and a foot region, and the plurality of transmission units are located in the body region.

[0021] By adopting the technical scheme, the comfort of the patient lying on the bed can be further improved, and the degree of disturbance of the fluctuation device to the patient can be reduced while ensuring that the fluctuation device sufficiently plays an anti-bedsores effect on the patient.

[0022] In summary, the present application has at least one of the following beneficial effects: 1. The anti-bedsores effect on a patient lying on a nursing bed for a long time can be effectively played, and the comfort of the patient lying on the nursing bed can be improved, which is helpful for the recovery of the patient; 2. The service life of the mattress can be effectively prolonged, and the reliability and stability of the fluctuation device in operation can be effectively improved; 3. It can effectively reduce the gap between the elastic pads, thereby reducing the probability of the patient's skin getting stuck in the gap, which can further improve the patient's comfort while reducing the probability of skin injury during the operation of the oscillation device to prevent bedsores. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the nursing bed in Example 1 without the undulating device installed (the side enclosure structures are omitted). Figure 2 This is a cross-sectional view along the length of the nursing bed equipped with the undulating device in Example 1 (simplified representation of the drive assembly). Figure 3 This is a cross-sectional view of the nursing bed equipped with the undulating device in Embodiment 1 along its own width (simplified representation of the drive assembly). Figure 4 This is a top view of the driving component in Embodiment 1 (a simplified representation of the driving component). Figure 5 This is a schematic diagram of the drive component in Embodiment 1; Figure 6 This is a schematic diagram of the structure after multiple movable wave-shaped covers are installed on the bed board in Example 1 (the side enclosure structures are omitted). Figure 7 This is a schematic diagram of the structure of the nursing bed in Example 2 when the undulating device is installed (the structure on the bed board is only briefly shown). Figure 8 This is a cross-sectional view of the nursing bed equipped with the undulating device in Example 2 along its own width. Figure 9 This is a schematic diagram of the transmission component in Example 2 when the wave device is not in operation; Figure 10 yes Figure 8 Enlarged view of point A in the middle; Figure 11 yes Figure 9 A cross-sectional view of the central transmission unit along line BB; Figure 12 This is a schematic diagram of the transmission component in Example 2 during the operation of the wave device.

[0024] Explanation of reference numerals in the attached drawings: 1. Bed frame; 11. Bed board; 111. Mounting groove; 112. Head area; 113. Body area; 114. Foot area; 12. Enclosure structure; 2. Base; 3. Mattress; 31. Elastic pad; 311. Air cavity; 312. Positioning groove; 32. Sleeve; 321. Mating part; 322. Connecting part; 4. Transmission assembly; 41. Transmission unit; 411. Seat; 412. Moving part; 413. First elastic element; 414. Partition; 415. Sliding part; 416. Third elastic element; 417. Limiting element; 42. Tensioning unit; 421. Tensioning roller; 422. Moving seat; 423. Second elastic element; 424. Air cushion; 4241. Cavity; 425. Air valve; 5. Drive assembly; 51. Drive element; 52. Frame; 53. Contact element. Detailed Implementation

[0025] The following is in conjunction with the appendix Figures 1-12 This application will be described in further detail.

[0026] This application discloses a pressure ulcer prevention device for a nursing bed. It is applied to a nursing bed to help the body of a bedridden patient who has been under pressure for a long time to move and stretch, effectively promote blood circulation, improve muscle activity, improve the patient's comfort while lying on the nursing bed, and effectively prevent pressure ulcers, which helps the patient recover.

[0027] Example 1: Reference Figure 1 and Figure 2 The nursing bed includes a bed body 1 and a base 2. The bed body 1 is for the patient to lie down and rest, while the base 2 is used to support the bed body 1.

[0028] The bed frame 1 includes a bed board 11 and an enclosure structure 12. The bed board 11 is generally rectangular in shape, and the enclosure structure 12 is installed perpendicular to the top of the bed board 11 and distributed along its edges to prevent bedridden patients from falling off. In this embodiment, the enclosure structure 12 is preferably composed of multiple panels; since the enclosure structure 12 with the above-mentioned effects is prior art in the art, it will not be described in detail here.

[0029] Reference Figure 2 and Figure 3 The base 2 has multiple casters installed at its bottom to facilitate the movement of the nursing bed by medical staff. In this embodiment, it is preferable that the base 2 has four casters installed at its bottom, and the four casters are located at the four corners of the base 2. Since the casters with the above-mentioned effects are common prior art, they will not be described in detail here.

[0030] In practical applications, the nursing bed also includes a lifting device for controlling the raising and lowering of the bed body 1 and an auxiliary device for assisting the patient in performing actions such as turning over, getting up, and sitting up. The bed board 11 can be partially flipped to cooperate with the auxiliary device in completing its function. Both the lifting device and the auxiliary device are installed between the bed body 1 and the base 2, and the base 2 supports the bed body 1 through the lifting device. In this embodiment, since the bed body 1, lifting device, and auxiliary device with the above functions are all prior art in the field, they will not be described in detail here. The lifting device and auxiliary device are omitted from the accompanying drawings, and the bed body 1 is only briefly shown.

[0031] Reference Figure 2 and Figure 4 The undulating device includes a transmission assembly 4 and two drive assemblies 5. The drive assemblies 5 are used to apply force to the back of the patient's body lying on the bed board 11; the transmission assembly 4 is used to transmit the force of the drive assembly 5 to the back of the patient's body lying on the bed board 11, transmitting the force in an undulating manner, which effectively prevents bedsores for the patient.

[0032] Reference Figure 2 and Figure 3 The transmission assembly 4 includes multiple transmission units 41.

[0033] The transmission unit 41 includes a base 411, a movable part 412, and a first elastic part 413.

[0034] Reference Figure 2 and Figure 5 The bed board 11 has multiple mounting slots 111 extending through its thickness direction for mounting the seat body 411, and the multiple mounting slots 111 are evenly distributed on the bed board 11. In this embodiment, it is preferable that the multiple mounting slots 111 are evenly distributed on the bed board 11 both along the length direction of the bed board 11 and along the width direction of the bed board 11.

[0035] The movable part 412 is movably installed on the seat 411. After the seat 411 is installed on the bed board 11, the direction of movement of the movable part 412 is parallel to the thickness direction of the bed board 11.

[0036] The movable part 412 is restricted in its movement relative to the seat 411. When the movable part 412 moves upward relative to the seat 411 to its limit position, the top of the movable part 412 will protrude from the seat 411 and be above the seat 411 and the bed board 11, and the bottom of the movable part 412 will be below the seat 411 and the bed board 11; when the movable part 412 moves downward relative to the seat 411 to its limit position, the top of the movable part 412 will be inside the seat 411, and the bottom of the movable part 412 will protrude from the seat 411 and be below the seat 411 and the bed board 11.

[0037] The first elastic element 413 is installed inside the seat 411, and its two ends are fixedly connected to the movable element 412 and the seat 411 respectively. It has the tendency to drive the movable element 412 to move downward relative to the seat 411 to the limit position and hold it there. In this embodiment, the first elastic element 413 is preferably a tension spring.

[0038] Reference Figure 3 and Figure 5 Both drive components 5 are mounted on the base 2 and located below the bed board 11, and are used to control the movement of multiple movable parts 412 relative to the corresponding seat 411 in a certain pattern.

[0039] The drive assembly 5 includes a drive element 51, a frame 52, and multiple contact elements 53.

[0040] The drive unit 51 is fixedly installed on the base 2. The frame 52 has an overall frame structure, and the drive unit 51 is used to drive the frame 52 to move relative to the base 2. The direction of movement of the frame 52 is parallel to the thickness direction of the bed board 11, and the frame 52 maintains a horizontal position during movement. In this embodiment, the drive unit 51 is preferably a servo electric cylinder. Since servo electric cylinders are common existing technology, they will not be described in detail here, and are only briefly shown in the accompanying drawings.

[0041] Multiple contact elements 53 are fixedly installed on the top of the frame 52 and are evenly distributed on the frame 52. Multiple mounting slots 111 on the bed board 11 are aligned with multiple contact elements 53 along the moving direction of the frame 52. When the bed board 11 is equipped with a seat 411 at the mounting slot 111, the contact element 53 will be aligned with the corresponding movable element 412 along the moving direction of the frame 52.

[0042] In this embodiment, preferably when the bed body 1 descends to the limit position relative to the base 2 and the frame 52 moves downward to the limit position relative to the base 2, the top of the multiple contact members 53 can contact and abut with the bottom of the corresponding movable member 412 that moves downward to the limit position, and at this time the drive member 51 drives the frame 52 to move upward, which can drive the multiple movable members 412 to move upward.

[0043] In this embodiment, among the multiple transmission units 41 preferably installed on the bed board 11, the transmission units 41 adjacent to each other along the length direction of the bed board 11 are driven by different drive components 5, and the two drive components 5 drive the transmission units 41 synchronously and in opposite directions. Therefore, when the two drive components 5 drive multiple transmission units 41 at the same time, the multiple moving parts 412 can exhibit a fluctuating activity pattern along the length direction of the bed board 11. When the two frames 52 are on the same horizontal plane, the multiple contact parts 53 on the two frames 52 will be distributed in rows at equal intervals along the length direction of the frames 52. One drive component 51 is used to drive the multiple contact parts 53 in multiple rows on its corresponding frame 52 (i.e., the multiple contact parts 53 in the first, third, fifth, seventh... rows at this time) to move, while the other drive component 51 is used to drive the multiple contact parts 53 in multiple rows on its corresponding frame 52 (i.e., the multiple contact parts 53 in the second, fourth, sixth, eighth... rows at this time) to move.

[0044] Reference Figure 2 and Figure 6 In this embodiment, preferably, multiple undulating covers are also movably installed above the bed board 11 to work with the undulating device. The multiple undulating covers correspond one-to-one with multiple transmission units 41, and the undulating device can apply the undulating effect to the back of the bedridden patient's body through the multiple undulating covers.

[0045] The undulating cover has a strip-shaped structure. During the process of two drive components 5 driving multiple undulating covers through multiple transmission units 41, the movement trends of adjacent undulating covers along the length of the bed board 11 are synchronous and opposite, thereby realizing a cyclical up-and-down alternating undulating motion pattern. This allows the patient's body part to intermittently contact the bed surface, periodically changing the pressure point of the patient's pressure points, reducing vertical pressure, friction, and shear force, improving and alleviating the continuous pressure accumulation of local tissues, promoting blood circulation and nutritional status of the patient's bed-bound parts, and further improving the effect of preventing pressure ulcers.

[0046] The implementation principle of the anti-bedsore fluctuation device for a nursing bed according to an embodiment of this application is as follows: After the patient lies on the bed board 11, the undulating device is activated. The drive component 5 drives multiple movable parts 412 to move up and down in a certain pattern. During the upward movement of the movable parts 412, the corresponding movable parts 412 can be driven to move upward, causing multiple undulating covers to undulate and apply force to the back of the patient's body in a undulating manner. This has the effect of promoting the patient's body movement, thereby effectively preventing bedsores.

[0047] Example 2: Reference Figure 7 and Figure 8The difference between this embodiment and embodiment 1 is that the transmission component 4 is removed, and in order to improve the comfort of the patient lying in bed, the design of the undulating cover is removed, and preferably the undulating device also includes a mattress 3 for the patient to lie on.

[0048] Reference Figure 7 and Figure 9 After the mattress 3 is installed above the bed board 11, the drive assembly 5 is used to apply force to the mattress 3; the transmission assembly 4 is used to transmit the force of the drive assembly 5 to the mattress 3, causing the mattress 3 to undulate, which effectively prevents bedsores for the patient.

[0049] Reference Figure 9 and Figure 10 The transmission unit 41 also includes a partition 414, two sliding members 415, two limiting members 417, and several third elastic members 416.

[0050] Reference Figure 9 and Figure 11 The sliding member 415 has a rectangular plate-like structure and is slidably mounted on the top of the seat 411. After the seat 411 is installed on the bed board 11, the sliding direction of the sliding member 415 is parallel to both its width direction and the length direction of the bed board 11, and the two sliding members 415 are respectively located on both sides of the adjacent movable member 412 along the length direction of the bed board 11. In this embodiment, it is preferable that the top of the sliding member 415 remains flush with the top of the seat 411 during the sliding process relative to the seat 411.

[0051] The partition 414 has a rectangular plate-like structure, which is elastic and can be bent and deformed along its thickness direction, and has a tendency to self-restore after bending and deformation. The two ends of the partition 414 in the width direction are fixedly connected to the opposite ends of the two sliding members 415, and the partition 414 is located above the top of the movable member 412.

[0052] Several third elastic elements 416 are installed inside the top of the seat 411, with their two ends fixedly connected to the slider 415 and the seat 411 respectively, and they have a tendency to drive the slider 415 to slide away from the other slider 415. In this embodiment, the third elastic elements 416 are preferably compression springs, and preferably, two third elastic elements 416 are connected between each slider 415 and the seat 411.

[0053] After both sliding members 415 slide in opposite directions under the action of the third elastic member 416, the partition 414 will remain in a state where the width direction is parallel to the sliding direction of the sliding member 415, and at this time the upper and lower end faces of the partition 414 are flush with the upper and lower end faces of the sliding member 415 respectively.

[0054] The limiting member 417 has a rectangular plate-like structure. The two limiting members 417 correspond one-to-one with the two sliding members 415. The limiting member 417 is installed at the end of the corresponding sliding member 415 away from the other sliding member 415, and the width direction of the limiting member 417 is parallel to the thickness direction of the sliding member 415.

[0055] Reference Figure 7 and Figure 9 The mattress 3 includes multiple elastic pads 31.

[0056] The elastic pad 31 has a rectangular parallelepiped structure and a sealed air cavity 311 inside, which is filled with gas, giving the elastic pad 31 a certain degree of elasticity and elastic deformation recovery ability.

[0057] Multiple elastic pads 31 are installed on the bed board 11 and located above the bed board 11. The bed board 11 is divided into a head area 112 for the head to lie on, a torso area 113 for the body to lie on, and a foot area 114 for the feet to lie on, according to the patient's lying posture. The elastic pads 31 have different sizes depending on the area. The width of the elastic pads 31 installed in the head area 112 and the foot area 114 is larger than the width of the elastic pads 31 installed in the torso area 113. In this embodiment, it is preferable that only one elastic pad 31 is installed in each of the head area 112 and the foot area 114, while multiple elastic pads 31 are installed in the torso area 113. The elastic pads 31 are installed with their length direction parallel to the width direction of the bed board 11, and the multiple elastic pads 31 are evenly distributed along the length direction of the bed board 11 and cover the surface above the bed board 11.

[0058] Furthermore, to further improve the comfort of patients lying in bed, it is preferable that the elastic pad 31 located in the body area 113 is fixedly installed on the bed board 11 through multiple seats 411, while the elastic pad 31 located in the head area 112 and the foot area 114 is fixedly installed on the bed board 11.

[0059] Multiple transmission units 41 are mounted on the bed board 11 and distributed within the body area 113, and are driven by two drive components 5 respectively. Each elastic pad 31 located within the body area 113 is simultaneously fixedly mounted to the bed board 11 via multiple seats 411.

[0060] The bottom of the elastic pad 31 installed in the head area 112 and foot area 114 is clamped and positioned between two limiting members 417, and the bottom of the elastic pad 31 has positioning grooves 312 on both sides along its width direction that are adapted to the limiting members 417; after the elastic pad 31 is connected to the bed board 11 through the seat 411, the positioning grooves 312 of the elastic pad 31 are engaged with multiple limiting members 417, and the limiting members 417 can limit the degree of elastic deformation of the bottom of the elastic pad 31.

[0061] The mattress 3 also includes a cover 32 for protecting the elastic pad 31 and effectively preventing the elastic pad 31 from shifting. The cover 32 has a certain degree of elasticity. In this embodiment, the cover 32 is preferably made of a fabric with a certain degree of elasticity.

[0062] The sleeve 32 includes multiple mating parts 321 and multiple connecting parts 322. Among the multiple mating parts 321, adjacent mating parts 321 are fixedly connected by connecting parts 322. The mating parts 321 are used to be fitted and fixedly installed on the outside of the elastic pad 31. After being fitted on the outside of the elastic pad 31, they can cover the top, both sides in the width direction and both sides in the length direction of the elastic pad 31, and the mating parts 321 and the elastic pad 31 are press-fitted. The connecting parts 322 are generally rectangular sheet structures. The two ends in the width direction are fixedly connected to two mating parts 321 respectively. After the mating parts 321 are fitted and the elastic pad 31 is fixedly installed on the bed board 11 by the seat 411, the connecting parts 322 will bend towards the bed board 11, located in the gap between two adjacent elastic pads 31 and above the bed board 11.

[0063] At this time, the cover 32 can effectively reduce the degree of damage to the elastic pad 31 during the use of the mattress 3, and at the same time reduce the probability of the elastic pad 31 being contaminated. The cover 32 is easy to disassemble, replace and clean, thus effectively extending the service life of the mattress 3.

[0064] Furthermore, during the use of the mattress 3, the skin of a bedridden patient may become stuck in the gap between adjacent elastic pads 31, which may aggravate the development of bedsores or even damage the patient's skin. After the cover 32 is installed, the connecting part 322 can not only effectively reduce the probability of the above situation, but also effectively prevent impurities from entering the gap between the elastic pads 31 and affecting the transmission process of the transmission unit 41. It can also keep the bed board 11 under the mattress 3 clean and tidy, which is convenient for subsequent cleaning and care of the bed.

[0065] Reference Figure 9 and Figure 10 Furthermore, to further improve the comfort of bedridden patients on the mattress 3, the preferred transmission assembly 4 also includes a plurality of tensioning units 42 for tensioning the sleeve 32.

[0066] The tensioning unit 42 is installed on the bed board 11 and located above the bed board 11. It is located in the gap between adjacent elastic pads 31, and the multiple tensioning units 42 correspond one-to-one with the multiple gaps formed by the multiple elastic pads 31.

[0067] The tensioning unit 42 includes a tensioning roller 421, two movable seats 422, two second elastic elements 423, an air cushion 424, and an air valve 425.

[0068] Two movable seats 422 are respectively installed on both sides of the bed board 11 in the width direction. The movable seats 422 are movably connected to the bed board 11, and their movement direction is parallel to the thickness direction of the bed board 11.

[0069] The tension roller 421 has a cylindrical structure, and its two ends along its axis are rotatably connected to two movable seats 422 respectively. Its rotation axis coincides with its own axis and is parallel to the width direction of the bed board 11.

[0070] Two second elastic elements 423 are respectively installed on both sides of the bed board 11 in the width direction, and each of the two second elastic elements 423 corresponds to one of the two movable seats 422. The two ends of the second elastic element 423 are fixedly connected to the corresponding movable seat 422 and the bed board 11, and it has the tendency to drive the movable seat 422 to move closer to the bed board 11. In this embodiment, the second elastic element 423 is preferably a tension spring.

[0071] The air cushion 424 has an overall annular cylindrical structure. It is sleeved and fixedly installed on the outside of the tension roller 421, and its axis coincides with the axis of the tension roller 421. The air cushion 424 is elastic and has a cavity 4241 for gas filling. It can expand and contract as gas enters and exits the cavity 4241.

[0072] An air valve 425 is fixedly installed at the end of the tension roller 421. It is connected to the air cushion 424, making the cavity 4241 of the air cushion 424 the same as the outside world, and it can control the air entering and leaving the cavity 4241 to control the expansion or contraction of the air cushion 424. In this embodiment, the air valve 425 is preferably a servo air valve 425; since the servo air valve 425 is common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0073] After the mattress 3 is installed, the tension roller 421, under the action of the second elastic element 423, keeps the air cushion 424 in contact with the corresponding connecting part 322, and keeps the connecting part 322 in a taut state. At this time, the tension of the connecting part 322 can be more finely adjusted by controlling the expansion or contraction of the air cushion 424 through the air valve 425. When the connecting part 322 is in a taut state, the parts of the multiple mating parts 321 that come into contact with the patient will also be in a taut state, thereby effectively reducing wrinkles on the surface of the cover 32 and further improving the patient's comfort on the mattress 3.

[0074] Reference Figure 9 and Figure 12At this time, when the patient lies on the mattress 3, multiple elastic pads 31 will be deformed under pressure. The top of the elastic pad 31 will bulge outward along its width, while the bottom of the elastic pad 31 will bulge downward under the restriction of the limiting member 417, thereby driving the corresponding spacer 414 to bend downward. At this time, there is a gap between the spacer 414 and the movable member 412. While the spacer 414 bends downward, it can drive the two sliding members 415 to slide towards each other. The two limiting members 417 further restrict the tendency of the bottom of the elastic pad 31 to bulge outward along its width, so as to reduce the impact of the deformation of the elastic pad 31 on the tensioning unit 42. At the same time, it can reduce the size of the gap between the tops of the elastic pads 31, thereby further reducing the probability of the patient's skin getting stuck in the gap. Meanwhile, after the elastic pad 31 is deformed under pressure, the tensioning unit 42 can still maintain the tension of the entire sleeve 32, thereby reducing the probability that the sleeve 32 will wrinkle after the elastic pad 31 is compressed, affecting the patient's comfort while lying in bed.

[0075] During the operation of the oscillating device, when the movable part 412 moves upward to its limit position, the movable part 412 will drive the partition 414 to bend and deform upward, and through the contact between the partition 414 and the elastic pad 31, the elastic pad 31 will be compressed and deformed. Due to the limiting effect of the two limiting parts 417 on the bottom of the elastic pad 31, the compression deformation of the elastic pad 31 will be concentrated on its top. At this time, the top of the elastic pad 31 can both bulge upward and deform outward along its width direction. When the movable part 412 moves downward to its limit position, the compression deformation of the elastic pad 31 is the same as the compression deformation of the elastic pad 31 when the patient lies on the mattress 3.

[0076] The implementation principle of the anti-bedsore fluctuation device for a nursing bed according to an embodiment of this application is as follows: After the patient lies on the mattress 3, the elastic pad 31 will be deformed by pressure, which can effectively improve the patient's comfort on the mattress 3; at the same time, multiple tensioning units 42 can keep the sleeve 32 taut, effectively reducing the probability of the patient's skin getting stuck in the gap between the elastic pads 31. During the long-term bed rest of the patient on the mattress 3, the undulating device is activated periodically. The drive component 5 drives multiple movable parts 412 to move up and down in a certain pattern. When the movable parts 412 move upward, they can drive the elastic pad 31 to bulge upward and deform. When the movable parts 412 move downward, the elastic pad 31 can still be compressed and deformed downward. This allows multiple elastic pads 31 to deform in a undulating pattern, which has the effect of promoting the patient's movement and thus effectively preventing bedsores. At the same time, during this process, multiple tensioning units 42 can still keep the sleeve 32 taut, and during the process of elastic pad 31 being compressed and deformed, the gap between elastic pads 31 can be effectively reduced, thereby effectively reducing the probability of wrinkles appearing on the surface of the mattress 3 causing patient discomfort. At the same time, it can further effectively reduce the probability of the patient's skin getting caught in the wrinkles or gaps, causing bedsores or even skin damage.

[0077] 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 pressure ulcer prevention device for a nursing bed, disposed on a nursing bed, the nursing bed comprising a bed body (1) and a base (2); the bed body (1) comprising a bed board (11) and a retaining structure (12), wherein the retaining structure (12) is disposed around the edge of the bed board (11), characterized in that, The wave device includes a transmission component (4) and two drive components (5); The transmission assembly (4) includes multiple transmission units (41), which are disposed on the bed board (11); The transmission unit (41) includes a base (411) and a movable part (412). The bed board (11) has multiple mounting slots (111) through which the seat (411) is installed. The movable part (412) is movably connected to the seat (411), and its direction of movement is perpendicular to the bed board (11). The movable part (412) passes through the seat (411) during its movement. The drive assembly (5) includes a frame (52), a drive member (51), and a plurality of contact members (53); the drive member (51) is disposed on the base (2) and is used to drive the frame (52) to move vertically relative to the base (2); the contact members (53) are disposed on the top of the frame (52) and their tops are used to contact the bottom of the movable member (412); During the process of the drive member (51) driving the frame (52) to move upward to the limit position, the multiple contact members (53) drive the multiple movable members (412) to move upward; the two drive members (51) drive the corresponding frame (52) to move in opposite directions and synchronously. The oscillation device also includes a mattress (3); The mattress (3) includes a plurality of elastic pads (31) which are disposed on the top of the bed board (11). The plurality of elastic pads (31) are distributed on the surface of the bed board (11) and are equally spaced along the length of the bed board (11). The mattress (3) is connected to the bed board (11) through multiple transmission units (41), and the bottom of the elastic pad (31) is connected to the top of the movable part (412); The transmission unit (41) also includes a first elastic element (413). The two ends of the first elastic member (413) are respectively connected to the seat (411) and the movable member (412), and the first elastic member (413) has the tendency to drive the movable member (412) downward to the limit position and hold it. The mattress (3) also includes a soft and elastic cover (32); The sleeve (32) includes multiple mating parts (321) and multiple connecting parts (322), and adjacent mating parts (321) are connected by the connecting parts (322); the multiple mating parts (321) correspond one-to-one with the multiple elastic pads (31), the mating parts (321) are adapted to the elastic pads (31), and the mating parts (321) and the elastic pads (31) are fitted together; when the multiple mating parts (321) are respectively fitted onto the multiple elastic pads (31), the connecting parts (322) are bent toward the bed board (11) and located between adjacent elastic pads (31).

2. The anti-bedsore fluctuation device for a nursing bed according to claim 1, characterized in that, The transmission assembly (4) further includes a plurality of tensioning units (42), which are located between adjacent elastic pads (31) and are used to tension the sleeve (32). The tensioning unit (42) includes a tensioning roller (421) and a plurality of second elastic elements (423). The tension roller (421) is movably and rotatably connected to the bed board (11), and its direction of movement is parallel to the direction of the movable part (412). Its rotation axis coincides with its own axis and is parallel to the width direction of the bed board (11). The two ends of the second elastic member (423) are connected to the bed board (11) and the tension roller (421) respectively, and it has the tendency to drive the tension roller (421) to move to the limit position and hold it in the direction closer to the bed board (11); the tension roller (421) contacts and abuts against the corresponding connecting part (322), and is used to drive the connecting part (322) to tension and drive the adjacent mating part (321) to tension.

3. The anti-bedsore fluctuation device for a nursing bed according to claim 2, characterized in that, The tensioning unit (42) also includes an air cushion (424) and an air valve (425); The air cushion (424) has a ring-shaped structure, which is sleeved and fixed on the outside of the tension roller (421), and is used to directly contact the corresponding connecting part (322); The air valve (425) is located on one side of the air cushion (424) and is used to control the expansion and contraction of the air cushion (424).

4. The anti-bedsore fluctuation device for a nursing bed according to claim 1, characterized in that, The elastic pad (31) has a sealed air cavity (311) inside, and the air cavity (311) is filled with gas.

5. The anti-bedsore fluctuation device for a nursing bed according to claim 4, characterized in that, The transmission unit (41) also includes a resilient partition (414). The partition (414) is disposed on the top of the seat (411) and located between the elastic pad (31) and the movable member (412); when the movable member (412) moves downward to its limit position, the partition (414) is bent and deformed in the direction closer to the movable member (412) by the force of the elastic pad (31) and maintains a distance from the movable member (412); when the movable member (412) moves upward to its limit position, the partition (414) is bent and deformed in the direction closer to the elastic pad (31) by the force of the movable member (412) and drives the elastic pad (31) to expand.

6. The anti-bedsore fluctuation device for a nursing bed according to claim 5, characterized in that, The transmission unit (41) also includes two sliding members (415) and several third elastic members (416). The sliding member (415) is slidably connected to the top of the seat (411), and its sliding direction is parallel to the length direction of the bed board (11); the partition (414) is disposed between the two sliding members (415), and its two ends are respectively connected to the two sliding members (415). The two ends of the third elastic member (416) are connected to the slider (415) and the seat (411) respectively, and it has a tendency to drive the slider (415) to slide away from the adjacent partition (414).

7. A device for preventing pressure ulcers on a nursing bed according to claim 6, characterized in that, The transmission unit (41) further includes two limiting members (417), which correspond one-to-one with the two sliding members (415), and the limiting members (417) are disposed on the top of the sliding members (415); The elastic pad (31) has positioning grooves (312) on both sides of its bottom that are adapted to the limiting member (417), and the bottom of the elastic pad (31) is clamped between the two limiting members (417) to limit its expansion.

8. The anti-bedsore fluctuation device for a nursing bed according to claim 1, characterized in that, The bed board (11) is divided into a head area (112), a torso area (113) and a foot area (114), and a plurality of the transmission units (41) are located in the torso area (113).

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