The bed backrest reduces pressure on the sacrum and features a retractable pressure ulcer prevention device.

Abstract

This utility model discloses a backrest retraction device for reducing sacral pressure and preventing pressure ulcers in a hospital bed. It includes a bed base frame and a bed frame. Casters are installed at the four corners of the bottom of the bed base frame. The bed base frame and the bed frame are connected by an upgrade bracket. A backrest folding structure is provided on the right side of the upper part of the bed frame. The backrest folding structure includes two sets of fixed brackets, each set consisting of two left and right fixed brackets. This utility model relates to the field of nursing bed technology. This backrest retraction device for reducing sacral pressure and preventing pressure ulcers is based on the normal functions of current hospital beds, ensuring the basic functions of lifting, raising the backrest, raising the legs, and tilting forward and backward. During the backrest folding process, a mechanical structure is modified to add a backrest folding structure. When the patient lies on the bed and performs the backrest folding action, the pressure generated by the folding is dispersed by the backrest moving backward, preventing pressure ulcers in the sacral area.

Description

Technical Field

[0001] This utility model relates to the field of nursing bed technology, specifically a bed backrest retraction device to reduce sacral pressure and prevent pressure sores. Background Technology

[0002] Hospital beds generally refer to nursing beds, which are usually powered beds, either electric or manual. They are designed to meet the bedridden living habits and treatment needs of patients or the elderly and have multiple nursing functions.

[0003] Referring to patent publication number "CN222285803U", a nursing bed is disclosed, including: a movable base frame, a support frame, a bed frame, a lifting mechanism, a weighing mechanism, a backrest angle adjustment mechanism and a legboard angle adjustment mechanism disposed on the bed frame, and a bed frame angle adjustment mechanism disposed on the support frame; the lifting mechanism includes: a first lifting drive assembly and a second lifting drive assembly, the first lifting drive assembly and the second lifting drive assembly being disposed between the movable base frame and the support frame.

[0004] As shown in the above technology, hospital beds generally have functions such as backrest raising, leg raising, height adjustment, and forward / backward tilting. However, due to the limited mobility of bedridden patients, the pressure generated by the direct folding of the backrest when the backrest function is frequently used will act on the patient's sacrum. The tissues in the sacrum are subjected to long-term pressure, resulting in persistent ischemia, hypoxia, malnutrition, and ultimately tissue ulceration and necrosis, leading to bedsores. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a bed backrest retraction device to reduce sacral pressure and prevent pressure sores. This solves the problem that the pressure from the folded backrest of existing beds acts directly on the patient's sacrum, easily causing pressure sores in that area.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: The bed backrest pressure relief and anti-pressure ulcer device includes a bed base frame and a bed frame. Casters are installed at the four corners of the bottom of the bed base frame. The bed base frame and the bed frame are connected by an upgrade bracket. A backrest folding structure is provided on the right side above the bed frame.

[0007] The back panel folding structure includes two sets of fixed brackets, one at the front and one at the back. Each set of fixed brackets consists of two fixed brackets on the left and right sides. Each set of fixed brackets is fixed to the front and back sides of the inner wall of the bed frame, respectively. Optical shafts are rotatably connected between each set of fixed brackets. Slider blocks are slidably connected to the surfaces of the two optical shafts. Locking components are provided on one side of each of the two optical shafts, and the locking components are used to lock the position of the sliders.

[0008] Preferably, a rotating seat is fixedly connected to the top of each of the two sliders, a back plate is rotatably connected to each of the two rotating seats, a backrest lifting rod is rotatably connected to the top of the bed frame, and the other end of the backrest lifting rod is rotatably connected to the bottom of the back plate.

[0009] Preferably, an electric push rod is fixedly connected to the middle part of the bed frame, and the telescopic end of the electric push rod is rotatably connected to the bottom of the back panel.

[0010] Preferably, the locking assembly includes a Y-shaped bracket, which is slidably connected to one side of the two left fixed brackets. An extension pedal is fixedly connected to one lower end of the Y-shaped bracket. Guide rods are fixedly connected to the left sides of both ends of the Y-shaped bracket. Guide blocks are fixedly connected to the two optical axes that pass through the left fixed bracket and extend to the left side of the fixed bracket. Guide grooves are formed inside the two guide blocks, and the two guide rods are respectively located inside the two guide grooves.

[0011] Preferably, the optical axis passes through the right-side fixed bracket and extends to one end of the fixed bracket, where a baffle is fixedly connected. A torsion spring is sleeved on the surface of the optical axis between the fixed bracket and the baffle. One end of the torsion spring is fixedly connected to one side of the fixed bracket, and the other end of the torsion spring is fixedly connected to one side of the baffle.

[0012] Preferably, the inner surface of the slider is provided with a fan-shaped groove, the surface of the optical axis is fixedly connected with a limiting strip, and the limiting strip is located inside the fan-shaped groove. A plurality of limiting teeth are fixedly connected at equal intervals on one side of the limiting strip, and a plurality of limiting tooth grooves that cooperate with the limiting teeth are provided on one side of the inner wall of the fan-shaped groove. The other side of the inner wall of the fan-shaped groove is a smooth surface, and the other side of the limiting strip is also a smooth surface.

[0013] Beneficial effects

[0014] This invention provides a backrest device for a hospital bed that reduces pressure on the sacrum and prevents pressure sores by retracting. Compared with the prior art, it has the following advantages:

[0015] 1. This bed backrest features a pressure-reducing and pressure-ulcer-preventing device that alleviates sacral pressure. The backrest folding structure includes two sets of fixed supports, one at the front and one at the back. Each set consists of two supports on the left and right sides, respectively fixed to the front and back of the bed frame. Optical shafts connect the supports. Based on the normal functions of a hospital bed, ensuring basic functions such as lifting, raising the backrest, raising the legs, and tilting forward and backward, the mechanical structure is modified during the backrest folding process. This folding mechanism distributes the pressure from the backrest's backward movement as the patient lies on the bed, preventing pressure sores on the sacral region.

[0016] 2. The backrest of this hospital bed features a retractable anti-pressure ulcer device that reduces pressure on the sacrum. This device includes a locking assembly with a Y-shaped support that slides along one side of two fixed supports on the left. An extension pedal is fixedly connected to one end of the Y-shaped support. After the backrest is folded down, the locking assembly locks it in place, improving the stability of the folded backrest. The pressure on the patient is distributed, reducing the pressure on components within the folded backrest structure and promoting long-term use. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the present invention after folding;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is an enlarged view of point A in this utility model;

[0021] Figure 5 This is a schematic diagram of the folding process of this utility model;

[0022] Figure 6 This is a schematic diagram of the back panel folding structure and locking assembly of this utility model;

[0023] Figure 7 This is a side view of the locking assembly of this utility model.

[0024] In the diagram: 1. Bed base frame; 2. Upgrade bracket; 3. Bed frame; 4. Backrest folding structure; 41. Fixed bracket; 42. Optical axis; 43. Slider; 44. Rotating seat; 45. Backrest; 46. Backrest lifting rod; 47. Electric push rod; 5. Casters; 6. Locking assembly; 61. Y-shaped bracket; 62. Guide rod; 63. Guide block; 64. Guide groove; 65. Baffle; 66. Torsion spring; 67. Fan-shaped groove; 68. Limiting strip; 69. Extension pedal. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-7 The bed backrest retraction device, designed to reduce pressure on the sacrum and prevent pressure sores, offers two technical solutions:

[0027] The first implementation includes a bed base frame 1 and a bed frame 3. Casters 5 are installed at the four corners of the bottom of the bed base frame 1. The bed base frame 1 and the bed frame 3 are connected by an upgrade bracket 2. A back panel folding structure 4 is provided on the right side above the bed frame 3.

[0028] The back panel folding structure 4 includes two sets of fixed brackets 41, one at the front and one at the back. Each set of fixed brackets 41 consists of two fixed brackets 41 on the left and one on the right. Each set of fixed brackets 41 is fixed to the front and back of the inner wall of the bed frame 3, respectively. A light shaft 42 is rotatably connected between each set of fixed brackets 41. A slider 43 is slidably connected to the surface of each of the two light shafts 42. A rotating seat 44 is fixedly connected to the top of each of the two sliders 43. A back panel 45 is rotatably connected to each of the two rotating seats 44. A backrest lifting rod 46 is rotatably connected to the top of the bed frame 3. The other end of the backrest lifting rod 46 is rotatably connected to the bottom of the back panel 45. An electric push rod 47 is fixedly connected to the middle part of the bed frame 3. The telescopic end of the electric push rod 47 is rotatably connected to the bottom of the back panel 45.

[0029] Based on the normal functions of the current hospital bed, and to ensure that the hospital bed has the basic functions of raising and lowering, raising the back, raising the legs, and tilting forward and backward, the mechanical structure is modified during the process of folding the backboard upward by adding a backboard folding structure 4. This allows the pressure brought by the backboard folding upward to be distributed by the backboard 45 moving backward, thus preventing the formation of pressure sores in the sacral area of ​​the patient.

[0030] The second embodiment differs from the first embodiment in that: a locking component 6 is provided on one side of each of the two optical axes 42, and the locking component 6 is used to lock the position of the slider 43. The locking component 6 includes a Y-shaped bracket 61, which is slidably connected to one side of the two left fixed brackets 41. An extension pedal 69 is fixedly connected to one end of the lower part of the Y-shaped bracket 61. Guide rods 62 are fixedly connected to the left sides of both ends of the Y-shaped bracket 61. Guide blocks 63 are fixedly connected to the two optical axes 42 that pass through the left fixed bracket 41 and extend to the left side of the fixed bracket 41. Guide grooves 64 are opened inside the two guide blocks 63, and the two guide rods 62 are respectively located inside the two guide grooves 64. A baffle 65 is fixedly connected to one end of the right fixed bracket 41. A torsion spring 66 is sleeved on the surface of the optical axis 42 located between the fixed bracket 41 and the baffle 65. One end of the torsion spring 66 is fixedly connected to one side of the fixed bracket 41, and the other end of the torsion spring 66 is fixedly connected to one side of the baffle 65. A fan-shaped groove 67 is opened on the inner surface of the slider 43. A limiting strip 68 is fixedly connected to the surface of the optical axis 42, and the limiting strip 68 is located inside the fan-shaped groove 67. Multiple limiting teeth are fixedly connected at equal intervals on one side of the limiting strip 68, and multiple limiting tooth grooves that cooperate with the limiting teeth are opened on one side of the inner wall of the fan-shaped groove 67. The other side of the inner wall of the fan-shaped groove 67 is a smooth surface, and the other side of the limiting strip 68 is also a smooth surface.

[0031] After the back panel 45 is folded up, the locking assembly 6 locks the position after it stops, which improves the stability of the back panel 45 after folding up. The pressure of the patient on the back panel 45 is distributed, reducing the pressure on the components in the folding structure of the back panel 45, which is beneficial for long-term use.

[0032] When performing the backrest adjustment operation on the hospital bed, stepping down the extension pedal 69 moves the Y-shaped support 61 downwards. With the cooperation of the guide rod 62 and the guide groove 64, the guide block 63 rotates. The rotation of the guide block 63 then rotates the optical axis 42. The rotation of the optical axis 42 causes the limiting strip 68 to engage with the limiting teeth on the inner wall of the fan-shaped groove 67. At this time, the electric push rod 47, located in the middle, acts on the center of the backrest 45 frame through the support, providing a pushing force to the backrest 45. Under this pushing force, the backrest 45 drives the connected sliders 43 on both sides to slide backwards. Simultaneously, this force also causes the backrest 45 to move backwards along the backrest adjustment lever 4. The upward lifting under the force of 6, the backward movement of slider 43 caused by the push of electric push rod 47 and the lifting of backrest lever 46 are generated simultaneously. Therefore, in the entire movement of back plate 45, at the same time as the push of electric push rod 47 is generated, back plate 45 slowly moves backward and slowly folds upward. Finally, slider 43 moves to the limit point on optical axis 42. The maximum stroke of electric push rod 47 and the optimal angle of backrest lever 46 are reached at the same time. Back plate 45 completes its movement. Finally, the extension pedal 69 is released. Under the action of torsion spring 66, limit bar 68 is reset. Limit teeth on limit bar 68 enter limit tooth groove, thereby locking the position of slider 43.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bed backrest retraction device to reduce sacral pressure and prevent pressure sores, comprising a bed base frame (1) and a bed frame (3), characterized in that: Casters (5) are installed at the four corners of the bottom of the bed frame (1). The bed frame (1) and the bed frame (3) are connected by an upgrade bracket (2). A back panel folding structure (4) is provided on the right side above the bed frame (3). The back panel folding structure (4) includes two sets of fixed brackets (41) at the front and back. Each set of fixed brackets (41) consists of two fixed brackets (41) on the left and right sides. Each set of fixed brackets (41) is fixed to the front and back sides of the inner wall of the bed frame (3). Optical shafts (42) are rotatably connected between each set of fixed brackets (41). Sliders (43) are slidably connected to the surfaces of the two optical shafts (42). A locking component (6) is provided on one side of each of the two optical shafts (42), and the locking component (6) is used to lock the position of the slider (43).

2. The bed backrest retraction device for reducing sacral pressure and preventing pressure sores according to claim 1, characterized in that: The top of each of the two sliders (43) is fixedly connected to a rotating seat (44), and a back plate (45) is rotatably connected to each of the two rotating seats (44). The top of the bed frame (3) is rotatably connected to a backrest pull rod (46), and the other end of the backrest pull rod (46) is rotatably connected to the bottom of the back plate (45).

3. The bed backrest retraction device for reducing sacral pressure and preventing pressure sores according to claim 2, characterized in that: An electric push rod (47) is fixedly connected to the middle part of the bed frame (3), and the telescopic end of the electric push rod (47) is rotatably connected to the bottom of the back panel (45).

4. The bed backrest retraction device for reducing sacral pressure and preventing pressure sores according to claim 1, characterized in that: The locking assembly (6) includes a Y-shaped bracket (61), which is slidably connected to one side of the two fixed brackets (41) on the left. An extension pedal (69) is fixedly connected to one end of the Y-shaped bracket (61) at the bottom. Guide rods (62) are fixedly connected to the left sides of both ends of the Y-shaped bracket (61). The two optical axes (42) pass through the left fixed bracket (41) and extend to the left side of the fixed bracket (41), and guide blocks (63) are fixedly connected to one end of each. Guide grooves (64) are opened inside the two guide blocks (63), and the two guide rods (62) are respectively located inside the two guide grooves (64).

5. The bed backrest retraction device for reducing sacral pressure and preventing pressure sores according to claim 1, characterized in that: The optical axis (42) passes through the right fixed bracket (41) and extends to one end of the fixed bracket (41) which is fixedly connected to a baffle (65). A torsion spring (66) is sleeved on the surface of the optical axis (42) between the fixed bracket (41) and the baffle (65). One end of the torsion spring (66) is fixedly connected to one side of the fixed bracket (41), and the other end of the torsion spring (66) is fixedly connected to one side of the baffle (65).

6. The bed backrest retraction device for reducing sacral pressure and preventing pressure sores according to claim 1, characterized in that: The inner surface of the slider (43) is provided with a fan-shaped groove (67). The surface of the optical axis (42) is fixedly connected with a limiting strip (68), and the limiting strip (68) is located inside the fan-shaped groove (67). A plurality of limiting teeth are fixedly connected at equal intervals on one side of the limiting strip (68), and a plurality of limiting tooth grooves that cooperate with the limiting teeth are provided on one side of the inner wall of the fan-shaped groove (67). The other side of the inner wall of the fan-shaped groove (67) is a smooth surface, and the other side of the limiting strip (68) is also a smooth surface.

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