Water bag mattress

Abstract

The utility model relates to the field of electricity, and discloses a water bag mattress which comprises a mattress cover, a mattress support, a plurality of strip-shaped water bags, a bidirectional booster pump and a pump driving circuit. The strip-shaped water bags are transversely arranged on the mattress supporting object in parallel, the odd-numbered water bags converge on one side and are communicated with one end of the bidirectional booster pump, and the even-numbered water bags converge on the other side and are communicated with the other end of the bidirectional booster pump; the pump driving circuit comprises an MOS tube, a timer, a pump driving power supply, a DPDT relay and a control power supply; the output end of the timer is connected to the grid electrode of the MOS tube, and the source electrode of the MOS tube is connected to the control power supply; one end of a control coil of the DPDT relay is connected to a drain electrode of the MOS tube; two common ports of the DPDT relay are respectively connected to two power supply input ends of the bidirectional booster pump; the positive electrode of the pump driving power supply is connected to the first normally-open contact and the second normally-closed contact of the DPDT relay, and the negative electrode of the pump driving power supply is connected to the first normally-closed contact and the second normally-open contact of the DPDT relay. The risk that a patient suffers from bedsores is reduced.

Description

Technical Field

[0001] The present application relates to the field of electrical technology, and more specifically to a water bag mattress. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the present application as recited in the claims. The description herein is not admitted to be prior art as disclosed by virtue of its inclusion in this section.

[0003] Bedsores, also known as pressure sores or pressure ulcers, are a common and serious complication in patients who are bedridden for a long time. Bedsores are mainly caused by damage to the skin and underlying tissues due to continuous pressure, and usually appear on bony protrusions of the body, such as the buttocks, heels, shoulder blades, pelvis, and elbows, because there is less soft tissue between the skin and bones in these areas, making them more susceptible to compression.

[0004] The main cause of bedsores is the constant external pressure on the local skin, which leads to the obstruction of blood circulation in the affected area. Blood carries oxygen and essential nutrients, and when blood flow is restricted, the skin and underlying tissues in these areas cannot get enough oxygen and nutrients, which leads to the death of tissue cells and the formation of ulcers.

[0005] In addition, excessive local temperature can also increase the risk of bedsores. When the temperature of the skin rises, this leads to increased blood flow, making the skin more vulnerable to damage. In a high temperature environment, sweat secretion increases and skin humidity rises. This hot and humid environment is an additional burden on the skin. High temperatures can also weaken the skin's barrier function, making the skin more susceptible to infection, thereby exacerbating the severity of bedsores.

[0006] Medical teams usually take a variety of preventive measures, including regularly changing the patient's position to relieve pressure on specific parts of the body. However, in an aging society, the number of nursing staff is often insufficient to meet the requirements of frequently changing the patient's position. How to reduce the risk of bedsores in bedridden patients through automatic means is a problem that needs to be solved.

[0007] In addition, the prior art also uses air mattresses to change the patient's position, but the air mattress has poor heat dissipation performance. In hot weather, the local temperature of the body surface in contact with the air mattress is too high, which increases the risk of bedsores. Summary of the invention

[0008] The purpose of the present application is to provide a water bag mattress, which can reduce the risk of bedridden patients developing bedsores.

[0009] In the present application, a water bag mattress is provided, comprising a mattress cover, a mattress support, a plurality of strip-shaped water bags, a two-way booster pump and a pump drive circuit:

[0010] The plurality of strip-shaped water bags are arranged in parallel and transversely on the mattress support and inside the mattress cover, wherein the strip-shaped water bags at odd-numbered positions converge at one side and are connected to one end of the two-way booster pump, and the strip-shaped water bags at even-numbered positions converge at the other side and are connected to the other end of the two-way booster pump;

[0011] The pump driving circuit includes a MOS tube, a timer, a pump driving power supply, a DPDT relay and a control power supply; the timer outputs a periodic square wave; the output end of the timer is connected to the gate of the MOS tube, and the source of the MOS tube is connected to the control power supply; one end of the control coil of the DPDT relay is connected to the drain of the MOS tube, and the other end is grounded; the two common ports of the DPDT relay are respectively connected to the two power input ends of the bidirectional booster pump; the pump driving power supply is a DC power supply, the positive electrode of the pump driving power supply is connected to the first normally open contact port and the second normally closed contact port of the DPDT relay, and the negative electrode of the pump driving circuit is connected to the first normally closed contact port and the second normally open contact port of the DPDT relay.

[0012] In a preferred example, when the timer outputs a high level, the MOS tube is turned on, the control coil of the DPDT relay is energized, the two common ports of the DPDT relay are respectively connected to the two normally closed contact ports, and the bidirectional booster pump rotates forward to drive water from the strip water bags at the odd positions to the strip water bags at the even positions; the strip water bags at the even positions filled with water support the body, and the positions of the strip water bags at the odd positions that are emptied form air permeable channels;

[0013] When the timer outputs a low level, the MOS tube is turned off, the control coil of the DPDT relay is powered off, the two common ports of the DPDT relay are respectively connected to the two normally open contact ports, and the bidirectional booster pump reverses to drive water from the strip water bags at the even-numbered positions to the strip water bags at the odd-numbered positions; the strip water bags at the odd-numbered positions filled with water support the body, and the positions of the strip water bags at the even-numbered positions that are emptied form air permeable channels.

[0014] In a preferred example, when the bidirectional booster pump reaches a preset pressure value, the water pressure remains stable.

[0015] In a preferred example, the strip water bags, the two-way booster pump and the connecting channels thereof form a closed system, and the amount of water in the closed system is such that when the strip water bags at odd-numbered positions are in a full state, the strip water bags at even-numbered positions are in an empty state.

[0016] In a preferred example, the timer is a 555 timer.

[0017] In a preferred example, in each cycle output by the timer, the duration of the high level and the duration of the low level are equal, and the total duration of each cycle ranges from 5 to 15 minutes.

[0018] In a preferred embodiment, the pump driving power supply adopts a voltage-stabilized power supply based on AC power.

[0019] In a preferred embodiment, the mattress cover is made of a material with good water permeability and excellent moisture absorption and perspiration discharge performance.

[0020] Compared with the prior art, the main differences and effects of the embodiments of the present application are:

[0021] The present application can periodically inflate and discharge the strip-shaped water bags at odd-numbered positions and the strip-shaped water bags at even-numbered positions, so that no part of the body of a bedridden patient is continuously under pressure, thereby effectively reducing the risk of bedridden patients developing bedsores;

[0022] Furthermore, part of the water bladder is always in a pressurized state, providing continuous support and good comfort, while the other part of the water bladder that is emptied forms a breathable channel, which has a good ventilation effect;

[0023] Furthermore, the present application has good heat dissipation performance, which reduces the risk of bedsores caused by excessively high local temperature of the patient's body surface in contact with the mattress in hot weather;

[0024] Furthermore, the present application has a simple circuit structure, simple control logic, and low production cost, and is suitable for popularization and application.

[0025] It should be understood that within the scope of this application, the above-mentioned technical features of this application and the technical features specifically described below (such as embodiments) can be combined with each other to form a new or preferred technical solution. Due to space limitations, they will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a schematic diagram of a front view of a mattress according to one embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the connection relationship between the strip-shaped water bag and the bidirectional booster pump of the mattress structure according to one embodiment of the present application;

[0029] Figure 3is a schematic diagram of a side view of a mattress according to one embodiment of the present application;

[0030] Figure 4 is a schematic diagram of a pump driving circuit according to an embodiment of the present application;

[0031] Figure 5 It is a schematic diagram of a periodic square wave signal output by a timer according to the present application.

[0032] In the accompanying drawings, the symbols are as follows:

[0033] 1- Mattress cover;

[0034] 2- Mattress support;

[0035] 301-each strip-shaped water bag at an odd number position;

[0036] 302-each strip-shaped water bag at the even-numbered position;

[0037] 4-bidirectional booster pump;

[0038] 41- a first power input terminal;

[0039] 42- a second power input terminal;

[0040] 5- Pump drive circuit;

[0041] 501-MOS tube;

[0042] 502-Timer;

[0043] 503- pump driving power supply;

[0044] 504-DPDT relay;

[0045] 504.1-First public port;

[0046] 504.2-First normally open contact port;

[0047] 504.3-First normally closed contact port;

[0048] 504.4-Second public port;

[0049] 504.5-Second normally open contact port;

[0050] 504.6-Second normally closed contact port;

[0051] 504.7-Control coil;

[0052] 505-control power supply. DETAILED DESCRIPTION

[0053] In the following description, many technical details are provided to help readers better understand the present application. However, those skilled in the art can understand that the technical solution claimed in the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0054] Description of some concepts:

[0055] DPDT relay: DPDT stands for Double Pole Double Throw. This type of relay has two independent sets of contacts, each of which can switch two circuit connection points. DPDT relays are suitable for applications that require high reliability and simultaneous control of multiple circuits.

[0056] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0057] In one embodiment of the present application, a water bag mattress is provided, and its front view structure is as follows: Figure 1 As shown, the device includes a mattress cover 1, a mattress support 2, strip-shaped water bags 301 at odd-numbered positions, strip-shaped water bags 302 at even-numbered positions, a two-way booster pump 4, and a pump drive circuit 5:

[0058] like Figure 1 , Figure 2 and Figure 3 As shown, the strip-shaped water bags 301 at odd-numbered positions and the strip-shaped water bags 302 at even-numbered positions are arranged in parallel and transversely on the mattress support 2 and inside the mattress cover 1, wherein the strip-shaped water bags 301 at odd-numbered positions converge at one side and are connected to one end of the two-way booster pump 4, and the strip-shaped water bags 302 at even-numbered positions converge at the other side and are connected to the other end of the two-way booster pump 4;

[0059] The bidirectional booster pump 4 has two power input terminals, namely a first power input terminal 41 and a second power input terminal 42. The bidirectional booster pump 4 used in the present application is a prior art. When the first power input terminal 41 is connected to the positive pole of the power supply and the second power input terminal 42 is connected to the negative pole of the power supply, the bidirectional booster pump 4 rotates forward and increases pressure in one direction; when the second power input terminal 42 is connected to the positive pole of the power supply and the first power input terminal 41 is connected to the negative pole of the power supply, the bidirectional booster pump 4 rotates reversely and increases pressure in the opposite direction; when the water pressure reaches a predetermined pressure, the bidirectional booster pump 4 will maintain this pressure.

[0060] like Figure 4As shown, the pump driving circuit 5 includes a MOS tube 501, a timer 502, a pump driving power supply 503, a DPDT relay 504 and a control power supply 505; the timer 502 outputs a periodic square wave; the output end of the timer 502 is connected to the gate of the MOS tube 501, and the source of the MOS tube 501 is connected to the control power supply 505; one end of the control coil 504.7 of the DPDT relay 504 is connected to the drain of the MOS tube 501, and the other end is grounded; the first common port 504.1 of the DPDT relay 504 is connected to the first power input terminal 41 of the bidirectional booster pump 4, and the second common port 504.4 is connected to the second power input terminal 42 of the bidirectional booster pump 4; the pump driving power supply 503 is a DC power supply, the positive electrode of the pump driving power supply 503 is connected to the first normally open contact port 504.2 and the second normally closed contact port 504.6 of the DPDT relay 504, and the negative electrode of the pump driving power supply 503 is connected to the first normally closed contact port 504.3 and the second normally open contact port 504.5 of the DPDT relay 504. Optionally, in one embodiment, the pump driving power supply 503 and the control power supply 505 are different voltage-stabilized power supplies based on the mains electricity. The pump driving power supply 503 is used to provide power to the bidirectional booster pump 4 , and its power is usually higher than that of the control power supply 505 .

[0061] Optionally, in one embodiment, when the timer 502 outputs a high level, the MOS tube 501 is turned on, the control coil 504.7 of the DPDT relay 504 is energized, the first common port 504.1 of the DPDT relay 504 is connected to the first normally open contact port 504.2, and the second common port 504.4 is connected to the second normally open contact port 504.5. At this time, the first power input terminal 41 is connected to the positive electrode of the pump driving power supply 503, and the second power input terminal 42 is connected to the negative electrode of the pump driving power supply 503, and the bidirectional booster pump 4 rotates forward to drive water from each strip water bag 301 at the odd position to each strip water bag 302 at the even position; each strip water bag 302 at the even position filled with water supports the body, so that the body of the bedridden patient will not be continuously under pressure, reducing the risk of bedsores, and the position of each strip water bag 301 at the odd position that is emptied forms a breathable channel, which has a ventilation effect;

[0062] When the timer 502 outputs a low level, the MOS tube 501 is turned off, the control coil 504.7 of the DPDT relay 504 is de-energized, the first common port 504.1 of the DPDT relay 504 is connected to the first normally closed contact port 504.3, and the second common port 504.4 is connected to the second normally closed contact port 504.6. At this time, the second power input terminal 42 is connected to the positive pole of the pump driving power supply 503, and the first power input terminal 41 is connected to the negative pole of the pump driving power supply 503. The bidirectional booster pump 4 reverses to drive water from the strip water bags 302 at the even-numbered positions to the strip water bags 301 at the odd-numbered positions; the strip water bags 301 at the odd-numbered positions filled with water support the body, so that the body of the bedridden patient will not be continuously under pressure, reducing the risk of bedsores, and the positions of the empty strip water bags 302 at the even-numbered positions form air permeable channels, which have a ventilation effect.

[0063] Optionally, in one embodiment, the direction of the bidirectional booster pump 4 is determined by the polarity of the input voltage. The polarity of the input voltage is determined by the polarity of the pump drive power supply 503 in the pump drive circuit 5 connected to the first power input terminal 41 and the second power input terminal 42, and the switching of the direction is controlled by the DPDT relay 504, and the on and off of the control coil 504.7 in the DPDT relay 504 is controlled by the timer 502. The circuit structure is simple, only a bidirectional booster pump 4 and a simple pump drive circuit 5 are required, no additional valves and water storage tanks are required, and the control logic is also simple, and only the periodic square wave signal of the timer 502 is required to control the direction of the bidirectional booster pump 4.

[0064] Optionally, in one embodiment, when the bidirectional booster pump 4 reaches a preset pressure value, the water pressure remains stable. The preset pressure can be set on the bidirectional booster pump 4 as needed.

[0065] When neither the first power input terminal 41 nor the second power input terminal 42 is connected to the pump driving power supply 503 , the bidirectional booster pump 4 stops working.

[0066] Optionally, in one embodiment, the working process of the present application is:

[0067] In the first cycle, the bidirectional booster pump 4 rotates forward to press water from the strip-shaped water bags 301 at the odd-numbered positions into the strip-shaped water bags 302 at the even-numbered positions. The pressure in the strip-shaped water bags 301 at the odd-numbered positions decreases, while the pressure in the strip-shaped water bags 302 at the even-numbered positions increases.

[0068] When the pressure of each strip-shaped water bag 302 at the even-numbered position reaches the set value, the bidirectional booster pump 4 stops and maintains a static state for a period of time, so that each strip-shaped water bag 302 at the even-numbered position can fully play its supporting role.

[0069] In the second cycle, the bidirectional booster pump 4 reverses to press water from the strip-shaped water bags 302 at the even-numbered positions back to the strip-shaped water bags 301 at the odd-numbered positions. The pressure in the strip-shaped water bags 302 at the even-numbered positions decreases, while the pressure in the strip-shaped water bags 301 at the odd-numbered positions increases.

[0070] When the pressure of each strip-shaped water bag 301 at the odd-numbered position reaches the set value, the bidirectional booster pump 4 stops and maintains a static state for a period of time, so that each strip-shaped water bag 301 at the odd-numbered position can fully play its supporting role.

[0071] In this way, water can be cyclically flowed between the strip-shaped water bags 301 at odd-numbered positions and the strip-shaped water bags 302 at even-numbered positions, thereby alternately providing support force for the patient.

[0072] Optionally, in one embodiment, the strip-shaped water bags 301 at odd-numbered positions, the strip-shaped water bags 302 at even-numbered positions, the two-way booster pump 4 and the connecting channels thereof constitute a closed system, and the amount of water in the closed system is a fixed value, and the amount of water is such that when the strip-shaped water bags 301 at odd-numbered positions are filled, the strip-shaped water bags 302 at even-numbered positions are just in an empty state. The water system is closed, there is no risk of leakage, and regular water replenishment is not required.

[0073] Optionally, in one embodiment, Figure 2 As shown, the strip-shaped water bags 301 at odd-numbered positions and the strip-shaped water bags 302 at even-numbered positions are connected by pipes, and the two-way booster pump 4 is installed in the middle position of the pipe, and the two water flow interfaces of the two-way booster pump 4 are respectively connected to the strip-shaped water bags 301 at odd-numbered positions and the strip-shaped water bags 302 at even-numbered positions.

[0074] Optionally, in one embodiment, the timer 502 is a 555 timer. Of course, other types of timers 502 can also be used as long as they can output square waves. The timer 502 that outputs square waves is common.

[0075] Optionally, in one embodiment, Figure 5 As shown, in each cycle output by the timer 502, the duration of the high level and the low level are equal, and the total duration of each cycle ranges from 5 to 15 minutes. The duration of the high level and the low level in the square wave, as well as the cycle length of the square wave can be adjusted according to the patient's condition.

[0076] Optionally, in one embodiment, the pump driving power supply 503 adopts a voltage-regulated power supply based on AC power.

[0077] Optionally, in one embodiment, the mattress cover 1 may be made of a material with good water permeability and excellent moisture absorption and perspiration discharge properties to further improve skin dryness.

[0078] It should be noted that in the claims and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0079] All documents mentioned in this application are cited as references in this application, just as each document is cited as reference individually. In addition, it should be understood that after reading the above teaching content of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A water bag mattress, characterized in that: The invention comprises a mattress cover (1), a mattress support (2), strip-shaped water bags (301) at odd-numbered positions, strip-shaped water bags (302) at even-numbered positions, a bidirectional booster pump (4), and a pump drive circuit (5): The strip-shaped water bags (301) at the odd-numbered positions and the strip-shaped water bags (302) at the even-numbered positions are arranged in parallel and transversely on the mattress support (2) and inside the mattress cover (1), wherein the strip-shaped water bags (301) at the odd-numbered positions converge on one side and are connected to one end of the bidirectional booster pump (4), and the strip-shaped water bags (302) at the even-numbered positions converge on the other side and are connected to the other end of the bidirectional booster pump (4); The pump drive circuit (5) comprises a MOS tube (501), a timer (502), a pump drive power supply (503), a DPDT relay (504) and a control power supply (505); the timer (502) outputs a periodic square wave; the output end of the timer (502) is connected to the gate of the MOS tube (501), and the source of the MOS tube (501) is connected to the control power supply (505); one end of the control coil (504.7) of the DPDT relay (504) is connected to the drain of the MOS tube (501), and the other end is grounded; the first common port of the DPDT relay (504) is connected to the drain of the MOS tube (501). (504.1) is connected to the first power input terminal (41) of the bidirectional booster pump (4), and the second common port (504.4) is connected to the second power input terminal (42) of the bidirectional booster pump (4); the pump driving power supply (503) is a DC power supply, the positive electrode of the pump driving power supply (503) is connected to the first normally open contact port (504.2) and the second normally closed contact port (504.6) of the DPDT relay (504), and the negative electrode of the pump driving power supply (503) is connected to the first normally closed contact port (504.3) and the second normally open contact port (504.5) of the DPDT relay (504).

2. The water bag mattress according to claim 1, characterized in that: The strip-shaped water bags (301) at the odd-numbered positions, the strip-shaped water bags (302) at the even-numbered positions, the two-way booster pump (4) and the connecting channels thereof form a closed system, wherein the amount of water in the closed system is such that when the strip-shaped water bags (301) at the odd-numbered positions are in a full state, the strip-shaped water bags (302) at the even-numbered positions are in an empty state.

3. The water bag mattress according to claim 1, characterized in that: The timer (502) is a 555 timer.

4. The water bag mattress according to claim 1, characterized in that: In each cycle output by the timer (502), the duration of the high level and the duration of the low level are equal, and the total duration of each cycle ranges from 5 to 15 minutes.

5. The water bag mattress according to claim 1, characterized in that: The pump driving power supply (503) adopts a voltage-stabilized power supply based on the mains electricity.

6. The water bag mattress according to any one of claims 1 to 5, characterized in that: The mattress cover is made of a material with water permeability and moisture absorption and perspiration discharge properties.

Images