Sacrococcygeal Suspension Micro-adjustment Pad

Abstract

This invention provides a sacrococcygeal suspension micro-adjustment pad, comprising a support body and a detachable outer cover. The support body includes two support zones spaced apart along the left-right direction and a midline load-reduction zone located between the two support zones. Each support zone is equipped with an independently adjustable support airbag and an adjustment component. The adjustment component is used to adjust the air pressure of the corresponding support airbag to create an adjustable support height difference and / or support load difference between the two support zones. The midline load-reduction zone is located corresponding to the sacrococcygeal projection area and is a non-through, low-contact, soft-transition structure. The middle of its upper surface is lower than the adjacent support zone and rises continuously in a curve from the midline to the support zones on both sides. The detachable outer cover covers the outside of the support body. This sacrococcygeal suspension micro-adjustment pad can reduce the risk of continuous pressure on the sacrococcygeal region and allows users who sit or lie down for long periods, especially those with limited mobility, to perform small, periodic redistribution of support from left to right without having to completely turn over.

Description

Technical Field

[0001] This invention relates to the field of health care devices, and more specifically, to a sacral and coccygeal suspension micro-adjustment pad. Background Technology

[0002] Pressure injuries are defined as localized skin and deep soft tissue injuries that typically occur at bony prominences or are related to instruments. They can present as intact skin or open ulcers and are often painful; their occurrence is associated with pressure or pressure combined with shear. The sacrococcygeal / coccygeal region is a typical bony prominence, and factors such as bed rest, restricted body position, moisture, and friction significantly increase the risk. Furthermore, in the early stages, changes in sensation, temperature, or stiffness may precede visible skin changes. Modern etiology further points out that deformation and strain concentration in soft tissues under sustained mechanical loads are important starting points for deep tissue injuries; the microenvironment (temperature and humidity) alters skin tolerance and couples with deformation risk.

[0003] The aforementioned risk of pressure injury is common among users who need to stay in bed for extended periods, have limited mobility, or maintain a sitting posture for long periods. To address these issues, existing technologies typically employ methods such as hollow sacral and coccygeal cushions, large pressure ulcer-preventing alternating mattresses, or ordinary bed support cushions.

[0004] However, existing coccygeal foramen / sacrococcygeal cavity pads, while visually appealing by creating central openings, lack sufficient edge pressure management. Some ring / donut-shaped positioning devices, designed to avoid the central pain area, pose risks of high edge pressure and uneven force distribution. These existing sacrococcygeal decompression pads often employ central openings or ring-shaped openings, which, while reducing direct contact in the central area, may create new localized pressure concentrations at the edges of the openings or rings. Furthermore, existing large anti-pressure ulcer alternating mattresses and ordinary bed support pads present challenges. The former involves a systemic alternating inflation and deflation of the entire bed, resulting in high cost, size, and deployment barriers, limiting its applicability and unsuitability for temporary use in the localized sacrococcygeal area. The latter uses single-layer foam or fixed-firm pads, lacking active micro-displacement capabilities, failing to meet the need for localized micro-displacement between turns in situations with significant pain, limited mobility, or intolerance to turning. Ordinary foam pads typically have a fixed-firm structure and cannot provide slight lateral support adjustments when patients cannot turn significantly. Summary of the Invention

[0005] The purpose of this invention is to provide a small, lightweight sacrococcygeal suspension micro-adjustment pad that can reduce the risk of continuous local pressure and shearing on the sacrum / coccyx and is easy for users or caregivers to operate, especially for providing local support redistribution when users cannot tolerate large turning or need to sit or lie down for a long time.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a sacrococcygeal suspension micro-adjustment pad, comprising a support body and a detachable outer cover covering the support body; the support body includes two support areas spaced apart in a left-right direction and a midline load-reducing area located between the two support areas; each support area includes an independently sealed support airbag and an adjustment component communicating with the support airbag, the two support airbags can adjust the air pressure respectively to form an adjustable support height difference and / or support load difference between the two support areas; the midline load-reducing area is set corresponding to the human sacrococcygeal projection area, the midline load-reducing area is a non-penetrating low-contact soft transition structure, the middle of its upper surface is lower than the adjacent support area, and rises continuously in a curve from the midline to the left and right support areas; the detachable outer cover covers the two support areas and the midline load-reducing area, and the adjustment component is at least partially located on the non-primary pressure-bearing side of the detachable outer cover.

[0007] In one embodiment, the centerline load reduction zone includes a low-contact load reduction strip disposed between two support airbags and / or between adjacent edges of the two support airbags. The upper surface of the low-contact load reduction strip forms a shallow groove, an arc surface, or a continuously recessed structure to prevent the centerline load reduction zone from forming through holes or sharp hard boundaries.

[0008] In one embodiment, the support body further includes a flexible buffer layer, which includes a high-resilience foam layer and a slow-resilience foam layer located above it. The high-resilience foam layer is located above the support airbag, and the slow-resilience foam layer at least covers the centerline de-load zone.

[0009] In one embodiment, the adjustment assembly includes an inflation / deflation valve and a manual inflation device, both of which are in communication with the support airbag and are at least partially exposed or operable from the non-primary pressure-bearing side of the removable cover.

[0010] In one embodiment, the adjustment assembly further includes a pressure indicator that communicates with the support airbag and indicates the air pressure inside the support airbag, the pressure indicator being coupled to the removable cover in a manner that allows the air pressure to be observed.

[0011] In one embodiment, the pressure indicating component is a small pressure gauge; or, the detachable outer cover is provided with a pressure indicating window, the pressure indicating component is an elastic diaphragm, the elastic diaphragm is provided with a color bar with color partitions, the color bar is set to correspond to the air pressure inside the supporting airbag and can be displayed in the pressure indicating window.

[0012] In one embodiment, the supporting airbag is made of a TPU film with a thickness of 0.16–0.60 mm, preferably 0.20–0.40 mm, which is formed by high-frequency welding or hot-press welding.

[0013] In one embodiment, the removable outer cover is disinfectable by wiping or washable, and includes a low-friction surface layer, a middle impermeable layer, and a bottom anti-slip layer arranged sequentially from top to bottom. The low-friction surface layer is achieved using low-friction / breathable fabric or 3D spacer fabric.

[0014] In one embodiment, the detachable outer cover has a central inspection flap, which is located above the centerline unloading zone.

[0015] In one embodiment, a positioning anti-slip structure is also included, which is located on the outer side of the bottom of the detachable outer cover to increase the friction of the bottom surface of the sacral and coccygeal suspension fine-tuning pad and / or to fix it to the bed sheet.

[0016] In one embodiment, the upper surface of the detachable outer cover is provided with a midline alignment mark corresponding to the sacral and coccygeal projection line, and the midline alignment mark is set to correspond to the midline of the midline deload area.

[0017] The beneficial effects of the technical solution provided by this invention are as follows: The sacrococcygeal suspension micro-adjustment pad of this invention supports the user's buttocks on both sides through two support zones of the support body, keeping the sacrococcygeal projection area in a low-contact or unloaded state, thereby reducing the risk of continuous local pressure on the sacrococcygeal area; at the same time, this invention does not set through holes with hard boundaries, but reduces the risk of new pressure points caused by hard edges through a non-through, low-contact, soft transition midline unloaded zone; through independently adjustable support airbags and adjustment components, an adjustable support height difference and / or support load difference is formed between the two support zones, allowing the user to perform small, periodic redistribution of support from side to side without having to completely turn over. In addition, the setting of the central inspection flip cover allows observation of the corresponding part of the midline unloaded zone or the dressing status without removing the entire pad, thereby improving the convenience of use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the structure of the sacrococcygeal suspension fine-tuning pad provided in one embodiment of the present invention; Figure 2 An exploded view of a sacrococcygeal suspension fine-tuning pad provided in one embodiment of the present invention; Figure 3 A cross-sectional schematic diagram of a sacrococcygeal suspension fine-tuning pad provided in one embodiment of the present invention; Figure 4 A schematic diagram of the force distribution of the sacrococcygeal suspension fine-tuning pad provided in one embodiment of the present invention; Figure 5A schematic diagram of the adjustment and air path module of the sacral and coccygeal suspension fine-tuning pad provided in one embodiment of the present invention; Figure 6 This is a structural schematic diagram of the top surface of the sacral and coccygeal suspension fine-tuning pad provided in an embodiment of the present invention, showing the alignment mark between the central inspection flap of the removable outer cover and the centerline.

[0020] Explanation of reference numerals in the attached figures: 100. Sacrococcygeal suspension micro-adjustment pad; 10. Support body; 11. Support area; 12. Centerline load reduction area; 13. Support airbag; 14. Low-contact load reduction strip; 141. Shallow groove; 15. Flexible buffer layer; 20. Removable outer cover; 30. Sheet clamping or fixing component; 40. Centerline alignment mark; 51. Inflation / depression valve; 52. Manual inflation component; 53. Pressure indicator component; 60. Central inspection flap; 200. Main load distribution curve; 300. Centerline low-contact load curve; 500. Sacrococcygeal contact contour curve. Detailed Implementation

[0021] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the invention. It should be understood that the accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention.

[0022] It should be understood that the structural components in the following embodiments can be combined or replaced according to different usage scenarios. As long as the sacral and coccygeal low-contact load reduction and left and right support redistribution functions described in this invention can be achieved, they should be considered to fall within the protection scope of this invention.

[0023] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0024] It should be noted that the concepts of "first" and "second" mentioned in this invention are only used to distinguish between devices, modules or units, and are not intended to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they intended to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] In this invention, the "low-contact soft transition structure" refers to a continuous curved surface structure with a lower support height and / or smaller contact load relative to the left and right support areas. It does not form through holes or sharp hard boundaries, and maintains the sacral and coccygeal projection area in a low-contact support state through the surface slope, material elasticity, or foam compression differences. The "non-primary pressure-bearing side" refers to a location that does not directly correspond to the user's primary hip support area or sacral and coccygeal projection pressure area during use, including the outer cover side, rear side, or outer pocket area.

[0026] See Figures 1 to 6 This invention relates to a sacrococcygeal suspension micro-adjustment pad 100, which makes fine adjustments to address the problem of sacrococcygeal pressure during prolonged sitting, lying down, or supine positions, reducing the risk of continuous local pressure and shearing on the sacrococcygeal / coccyx, and is suitable for usage scenarios where activity is limited or prolonged sitting or lying down is required.

[0027] The sacral and coccygeal suspension micro-adjustment pad 100 includes a detachable outer cover 20, a support body 10, and a positioning and anti-slip structure. The support body 10 plays a major supporting role and is located inside the detachable outer cover 20. The positioning and anti-slip structure is located on the bottom outer side of the detachable outer cover 20 and is used to fix it to the bed sheet to prevent the sacral and coccygeal suspension micro-adjustment pad 100 from accidentally shifting during use on the bed.

[0028] The supporting body 10 includes two supporting areas 11 and a centerline load-reducing area 12 located between the two supporting areas 11. The two supporting areas 11 are spaced apart in the left-right direction to support the user's two buttocks respectively. The centerline load-reducing area 12 is located corresponding to the sacrum and coccyx and is a non-perforated, low-contact, soft transition structure to reduce pressure on the sacrum and coccyx area, so that the load is mainly distributed in the soft tissue area of ​​the two buttocks, reducing the risk of continuous local pressure on the sacrum and coccyx area.

[0029] Each of the support zones 11 is equipped with an independently adjustable support airbag 13 and an adjustment component. The support airbag 13, when inflated, provides support. The adjustment component is connected to the support airbag 13 and used to adjust the air pressure within the airbag 13, creating an adjustable difference in support height and / or support load between the two support zones 11. This results in a slight redistribution of the pelvic support load in the left-right direction. This periodic redistribution of support reduces the duration of continuous pressure on the same area, allowing the user or caregiver to make minor adjustments to the left and right support zones 11 without requiring complete repositioning.

[0030] See Figure 3 The centerline load reduction zone 12 is a non-penetrating low-contact soft transition structure. The middle of its upper surface is lower than the adjacent support zone 11. It rises continuously from the centerline to the left and right support zones 11 through the shallow groove 141, arc surface or continuous concave structure of the low-contact load reduction zone 14, so that the centerline load reduction zone 12 does not form through holes or sharp hard boundaries.

[0031] The detachable outer cover 20 is fitted over the outside of the supporting body 10 and encloses the supporting area 11 and the centerline load reduction area 12 within it.

[0032] Please combine Figure 4 In the figure, reference numeral 500 represents the user's sacral-coccygeal contact profile curve, while reference numerals 200 and 300 represent the main load distribution curve and the midline low contact load curve, respectively. According to... Figure 4 It is understood that by supporting the user's buttocks through two support zones 11, the load is distributed to both sides of the buttocks, reducing the risk of continuous local pressure on the sacrococcygeal region. Furthermore, the sacrococcygeal suspension micro-adjustment pad 100 of this invention does not have through-holes with hard boundaries (the midline load-relief zone does not penetrate the outer cover), but instead forms a continuous soft transition low-contact area through curved slopes and material gradients to reduce the risk of edge stress concentration. Finally, by periodically redistributing support, the continuous pressure time in the same area is reduced, providing local support management for the user without requiring complete repositioning.

[0033] The support airbags 13 in the left and right support areas 11 are formed using thermoplastic polyurethane film (TPU film) or composite film, and are each connected to an independent valve. When using TPU film to make the support airbags 13, the thickness of the TPU film is 0.16–0.60 mm, preferably 0.20–0.40 mm, and it is formed using high-frequency / hot-press welding for edge sealing. In another embodiment, the TPU film can be replaced with a composite TPU / fabric-reinforced film to improve puncture resistance.

[0034] The detachable outer cover 20 can be wiped clean or washed, and includes a low-friction surface layer, a middle impermeable layer, and a bottom anti-slip layer arranged sequentially from top to bottom. The low-friction surface layer is a low-friction fabric or wipeable membrane material to accommodate routine cleaning or disinfection procedures; the middle impermeable layer is a TPU / PU composite membrane to withstand wiping with common cleaning or disinfectant agents; and the bottom anti-slip layer is an adhesive / anti-slip textured TPU layer to reduce the shearing effect caused by a slight slippage during use.

[0035] Preferably, the detachable outer cover 20 can form two separate independent cavities (e.g., a pocket-like structure) inside, each accommodating a supporting airbag 13, thus forming a supporting cavity. The area between the two cavities is the centerline load reduction zone 12. This facilitates the positioning and assembly of the supporting airbag 13 and the outer cover, thereby ensuring the consistency of the centerline of the centerline load reduction zone 12.

[0036] The supporting body 10 also includes a flexible buffer layer 15, which comprises a high-resilience foam layer and a thin layer of slow-rebound foam on top of it. The thin layer of slow-rebound foam at least covers the centerline load-reduction zone 12. By using high-resilience foam as the supporting body and layering a thin layer of slow-rebound material on the upper surface to form a smoother transition, different body shapes can be covered by adjustable airbag height and foam compression.

[0037] The adjustment assembly includes an inflation / deflation valve 51 and a manual inflation component. Both the inflation / deflation valve 51 and the manual inflation component are connected to the supporting airbag 13 and are at least partially exposed or operable from the non-primary pressure-bearing side of the detachable outer cover 20. The inflation / deflation valve 51 includes a one-way valve and a deflation valve, and the deflation valve supports small-step deflation to adjust the support height difference and / or support load difference between the two supporting zones 11. The manual inflation component is a manual inflation ball 52 or a manual air pump, which can be fixedly connected to each supporting airbag 13, or two supporting airbags 13 can share one, and it is installed and removed between the two air passages during use.

[0038] Furthermore, the adjustment assembly also includes a pressure indicator that communicates with the support airbag 13 and indicates the air pressure inside the support airbag 13, the pressure indicator being coupled to the removable cover 20 in a manner in which the air pressure can be observed.

[0039] In one embodiment, the pressure indicating component is a small pressure gauge 53 installed next to the valve seat, which can meet the need to monitor the internal air pressure of the support airbag 13 in a low pressure range.

[0040] In another embodiment, the detachable outer cover 20 is provided with a pressure indicator window. The pressure indicator component is an elastic diaphragm. The elastic diaphragm has a color bar with color zones corresponding to the air pressure of the supporting airbag 13. The color bar shifts as the air pressure of the supporting airbag 13 changes and is displayed in the pressure indicator window. Preferably, in this invention, the elastic diaphragm is made of silicone elastomer or other materials with elastic recovery capabilities to improve durability and chemical stability.

[0041] Adding low-pressure mechanical gauges or elastic diaphragms to the circuits of the two support zones to indicate the internal air pressure of the support airbags allows different operators to more consistently achieve the target air pressure range, improving operational consistency and the repeatability of parameter recording. It should be noted that the indicating device should be installed on a non-primary pressure-bearing side, such as in an outer pocket of the outer cover, to avoid creating a localized pressure point.

[0042] Please combine Figure 5 The two supporting airbags 13 can adjust their internal air pressure through the adjustment components, so that a difference in supporting height and / or a difference in supporting load are formed between the two supporting areas 11, thereby causing a slight redistribution of the supporting load in the sacral and coccygeal regions in the left and right directions.

[0043] Please combine Figure 6 The detachable outer cover 20 has visual alignment marks on its surface, including at least one midline alignment mark 40 and at least one set of left and right symmetrical auxiliary marks, which are used to quickly locate the corresponding area of ​​the sacrum and coccyx under different body types.

[0044] The positioning anti-slip structure includes an anti-slip layer, which is any one of adhesive fabric, anti-slip textured film or anti-slip rubber layer. It is located on the outer bottom of the detachable outer cover 20. The frictional characteristics of the anti-slip layer make it less likely for the device to slip relative to the bed sheet when the head of the bed is raised within the range of 0°–30°, reducing shearing caused by the head of the bed being raised or the user sliding down, because shearing and deformation are important factors of pressure injury.

[0045] The positioning and anti-slip structure may also be equipped with the sheet clamping or fixing component 30, which is a detachable clip, strap, Velcro fastener or a combination thereof, to adapt to different sheet systems and reduce device displacement.

[0046] Please combine Figure 6 The detachable outer cover 20 has a central inspection flip cover 60, which is located above the centerline unloading area 12. The central inspection flip cover 60 is used to observe the corresponding part of the centerline unloading area 12 or the dressing status without removing the entire pad, which is convenient to use.

[0047] The materials of the detachable outer cover 20 and the supporting body 10 can be selected according to the usage environment to be materials that can withstand the cleaning and disinfection procedures commonly used for non-critical care equipment, and maintain the smoothness and anti-slip properties of the outer cover edges after a predetermined cleaning cycle.

[0048] The sacrococcygeal suspension micro-adjustment pad 100 of the present invention is relatively small in size. In one embodiment, the width of the sacrococcygeal suspension micro-adjustment pad is 320–480 mm, the length is 240–420 mm, and the thickness is 10–80 mm; preferably, the width is 360–420 mm, the length is 260–320 mm, and the thickness is 15–70 mm. The thickness in the uninflated state is 15–40 mm, and the inflation allows the effective support height to be adjusted within the range of 20–70 mm. The height changes with inflation and foam compression, making it suitable for local sacrococcygeal support scenarios for users of different body types.

[0049] The above dimensions can be adjusted according to the user's body type, usage scenario, and whether the user is lying down or sitting. When used in a sitting scenario, the length of the sacral and coccygeal suspension micro-adjustment pad can be appropriately increased to improve sitting stability and the transition of proximal thigh support.

[0050] The sacrococcygeal suspension fine-tuning pad 100 of the present invention can be prepared by the following steps: 1) Design: Define the midline based on the pelvic symmetry axis, and perform surface modeling on the two support areas 11 on the left and right sides to ensure that the midline is a "low-contact soft transition area" rather than a hard edge hole; 2) Forming of support airbag 13: Cut TPU into pieces, then use high frequency to weld the cut TPU pieces and leave valve ports, heat weld or glue the inflation / deflation valve 51 to the valve ports, and finally inflate by pressure drop method to conduct air tightness test. 3) Flexible buffer layer 15: The curved surface is processed on the block foam by CNC or die cutting, the foam of the processed curved surface is bonded and layered, and then positioned and attached to the airbag mentioned above. 4) Outer Cover Sewing: The upper low-friction / breathable fabric (or 3D spacer fabric), the middle waterproof layer, and the bottom anti-slip layer are combined in layered order and then sewn together to form the outer cover structure. A zipper or cover structure is provided at the opening of the outer cover to form a detachable design. In addition, the bottom of the detachable outer cover 20 is provided with a fixing structure for positioning and fixing with the bed sheet; 5) Final assembly: Install the supporting airbag 13, low-contact load-reducing belt 14 and flexible buffer layer 15 into the outer cover according to the preset structure, and expose the valve port for connection of the inflation / deflation valve 51 to adjust the air pressure in the airbag.

[0051] The sacral and coccygeal suspension fine-tuning pad 100 of the present invention can be used in accordance with the following steps: With the user in a supine position, place the sacrococcygeal suspension micro-adjustment pad 100 under the pelvis and align the midline alignment mark 40 with the sacrococcygeal projection line. Inflate the support airbags 13 of the two support zones 11 to the initial support state so that the centerline load reduction zone 12 is in low contact support; The support height difference and / or support load difference between the two support airbags 13 are then alternately changed at preset time intervals (10–60 minutes) to slightly redistribute the support load in the left-right direction, thereby reducing the continuous pressure time on the sacral and coccygeal regions. For example, every 30 minutes, the air pressure in the left support airbag 13 is increased by a predetermined amount, and the air pressure in the right support airbag 13 is decreased by a predetermined amount; then the opposite state is switched, thereby alternating left-right fine adjustments to create a perceptible but not uncomfortable small difference in support.

[0052] During use, the user's local pressure status and comfort can be observed as needed. If significant discomfort or unsuitability for continued use occurs, use can be paused and the support status adjusted. For users who have difficulty turning over or adjusting themselves, the central inspection flap 60 can be opened during the adjustment interval to observe the corresponding part of the centerline de-loading zone 12 or the dressing status, and changes in comfort can be recorded.

[0053] This invention is also applicable to scenarios involving prolonged sitting, such as long-distance driving, office work, or other situations requiring continuous sitting support. Users can adjust the air pressure of the left and right support airbags 13 according to their comfort level, creating a small difference in support height and / or support load between the two support areas 11, thereby reducing the risk of continuous pressure on the sacral and coccygeal regions.

[0054] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions as those in the present invention.

[0055] Although the subject matter has been described using structurally specific language, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific structures described above. Rather, the specific structures described above are merely illustrative examples of implementing the claims.

Claims

1. A sacrococcygeal suspension fine-tuning pad, characterized in that, Includes a supporting body and a removable outer cover that covers the outside of the supporting body; The supporting body includes two supporting areas spaced apart in the left-right direction and a centerline load reduction area located between the two supporting areas. Each of the support zones includes an independently sealed support airbag and an adjustment component connected to the support airbag. The two support airbags can adjust their air pressure to create an adjustable support height difference and / or support load difference between the two support zones. The midline load reduction zone is set in accordance with the human sacral and coccygeal projection area. The midline load reduction zone is a non-penetrating low-contact soft transition structure. The middle of its upper surface is lower than the adjacent support area, and it rises continuously in a curve from the midline to the support areas on the left and right sides. The removable outer cover encloses the two support areas and the centerline load-reducing area.

2. The sacrococcygeal suspension fine-tuning pad according to claim 1, characterized in that, The centerline load reduction zone includes a low-contact load reduction strip, which is located between two support airbags and / or between adjacent edges of the two support airbags. The upper surface of the low-contact load reduction strip forms a shallow groove, an arc surface, or a continuous concave structure to prevent the centerline load reduction zone from forming through holes or sharp hard boundaries.

3. The sacrococcygeal suspension fine-tuning pad according to claim 1, characterized in that, The supporting body also includes a flexible buffer layer, which includes a high-resilience foam layer and a slow-resilience foam layer above it. The high-resilience foam layer is located above the supporting airbag, and the slow-resilience foam layer at least covers the centerline load reduction zone.

4. The sacrococcygeal suspension fine-tuning pad according to claim 1, characterized in that, The adjustment assembly includes an inflation / deflation valve and a manual inflation component, both of which are connected to the support airbag and are at least partially exposed or operable from the non-primary pressure-bearing side of the removable outer cover.

5. The sacrococcygeal suspension fine-tuning pad according to claim 4, characterized in that, The adjustment assembly also includes a pressure indicator that communicates with the support airbag and indicates the air pressure inside the support airbag, the pressure indicator being coupled to the removable cover in a manner that allows the air pressure to be observed.

6. The sacrococcygeal suspension fine-tuning pad according to claim 5, characterized in that, The pressure indicating component is a small pressure gauge; or, the detachable outer cover is provided with a pressure indicating window, the pressure indicating component is an elastic diaphragm, the elastic diaphragm is provided with a color bar with color partitions, the color bar is set to correspond to the air pressure inside the supporting airbag and can be displayed in the pressure indicating window.

7. The sacrococcygeal suspension fine-tuning pad according to claim 1, characterized in that, The supporting airbag is made of TPU film with a thickness of 0.16–0.60 mm, which is formed by high-frequency welding or hot-press welding.

8. The sacrococcygeal suspension fine-tuning pad according to claim 1, characterized in that, The removable outer cover can be disinfected by wiping or is washable, and it includes a low-friction surface layer, a middle impermeable layer and a bottom anti-slip layer arranged sequentially from top to bottom.

9. The sacrococcygeal suspension fine-tuning pad according to claim 1, characterized in that, The detachable outer cover has a central inspection flap, which is located above the centerline load reduction area. The zipper, Velcro, fastener, or overlapping edge of the central inspection flap is located on the side, rear side, or other non-sacral and coccygeal projection pressure position of the centerline load reduction area.

10. The sacrococcygeal suspension fine-tuning pad according to claim 1, characterized in that, It also includes a positioning and anti-slip structure, which is located on the outer side of the bottom of the detachable outer cover to increase the friction of the bottom surface of the sacral and coccygeal suspension fine adjustment pad and / or fix it to the bed sheet; the upper surface of the detachable outer cover is provided with a centerline alignment mark corresponding to the sacral and coccygeal projection line, and the centerline alignment mark is set to correspond to the centerline of the centerline load reduction area.

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