JPH0354736Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a device for preventing bedsores for bedridden elderly people and the like.

(Prior Art) One example of a conventional bed sore prevention device is the one proposed in Japanese Patent Publication No. 16454/1983. Body 1 has three air chambers 1
1, 12, and 13, the first air chamber 11
The air sacs in the first air chamber 11 and the air sacs in the second air chamber 12 are separated from each other by the third air chamber 13 and are expandable and deflated. are arranged alternately, and the third air chamber 13 is composed of narrow zigzag air sacs that can be expanded and contracted.
It is provided along the boundary between the first air chamber 11 and the second air chamber 12, and air jet holes 3 are provided on the upper surface. And these air chambers 11, 12, 13 have 1
The pump 2 on the stand supplies pressurized air, and the pump 2
and each air chamber 11, 12, 13 is provided with a solenoid valve.
V ₁ , V ₂ , V ₃ are provided, and these solenoid valves
The supply of pressurized air to each air chamber 11, 12, 13 is controlled by V ₁ , V ₂ , and V ₃ . The operations of these solenoid valves V ₁ to _{V 3} are controlled by a control circuit 5 which is switched by a changeover switch 4. For example, when the changeover switch 4 is switched to position A, the control circuit 5 is all solenoid valve V ₁ ~
V ₃ is controlled to turn on, and all air chambers 11, 12,
13 is supplied with pressurized air. In this case, the entire air mat body 1 is in an inflated state, and air is ejected from the air ejection holes 3 of the third air chamber 13. Third
The air blown out from the air chamber 13 has the effect of removing moisture from the skin. Further, when the switch 4 is switched to the B position, the control circuit 5 turns off the solenoid valve _V3 , cuts off the air supply to the third air chamber 13, and turns off the solenoid valve V3.
Only V ₁ and solenoid valve V ₂ are turned on and off alternately, and the first air chamber 11 and the second air chamber 12 repeatedly supply and discharge pressurized air sent from the pump 2, thereby expanding and contracting. This is repeated at the same time, and the support position of the human body lying on the air mattress body 1 is alternately changed to promote blood circulation and thereby prevent bedsores. Furthermore, when the switch 4 is switched to the C position, the solenoid valves V ₁ and V ₂ are turned on and off alternately, and the solenoid valve V ₃ remains on, so that the first air chamber 11 and the second air chamber 12 are connected to each other. is expanded and contracted alternately, while air is constantly ejected from the air ejection holes 3 in the third air chamber.

(Problems to be solved by the invention) However, such conventional devices have the following problems. That is, the first air chamber 11 and the second air chamber 1
2 and the third air chamber 13 are supplied by one pump 2, but the piping from the pump 2 to each air chamber 11, 12, 13 is Since the solenoid valves V ₁ , V ₂ , and V ₃ provided in the air outlet are on/off valves, the amount of air ejected from the air ejection hole 3 cannot be adjusted, and therefore, it is difficult to adjust the amount of air ejected from the air ejection hole 3. There was no other option but to stop the eruption. In this case, it seems possible to reduce the amount of air ejected by reducing the amount of protrusion of the pump, but if the amount of protrusion of the pump decreases, the amount of air that expands the first and second air chambers 11 and 12 will also decrease at the same time. Since the amount of air decreases, it is not possible to adjust the amount of air with the pump.

The present invention is intended to cause air regulated by a flow rate regulating valve to be ejected from the third air chamber, regardless of the air that expands and contracts the first and second air chambers.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a flat mat body with a narrow zigzag-shaped third air chamber having an air jet hole on the upper surface, and The structure has a first air chamber and a second air chamber that can be expanded and contracted, and is provided with one pump.
The air chamber is provided with piping so that air whose pressure is regulated by a pressure control valve is alternately supplied from the pump via a distributor, and the air whose flow rate is regulated from the pump by a flow control valve is supplied to the third air chamber. This is a means to solve the problem by installing piping to supply air.

(Function) When the pump is operated, pressurized air discharged from the pump flows toward the pressure control valve side circuit on one side and flows into the flow rate control valve side circuit on the other side. First, in the circuit on the pressure control valve side, the pressure is adjusted to an appropriate level by the current control valve, and is alternately supplied to the first and second air chambers by the constantly rotating distributor. When pressurized air is supplied to the first air chamber, each part of the first air chamber expands at the same time, and the first air chamber of the mat body expands, and then the distributor sends air to the second air chamber in the same way. Pressurized air is fed, and the pressurized air is discharged from the first air chamber. Since the distributor is always operating, the first
Pressurized air is again supplied to the air chamber, exhaust is performed in the second air chamber, and this process is repeated thereafter, so that the entire mat body performs a wave motion.

The air discharged from the pump into the third air chamber is adjusted by a flow rate control valve to the amount that suits the physical condition and preferences of the person sleeping on the mat, and then is sent to the third air chamber via piping. After inflating the same air chamber, it is ejected from the air ejection hole on the top surface. As mentioned above, the first and second air chambers alternately expand and contract, and the third air chamber normally blows out pressurized air.
To dry the skin of a sick person and to prevent bed sores in bedridden elderly people etc. by the pulsating motion of the pine body and the action of constantly blown air at an appropriate flow rate during that time.

(Example) The present invention will be described below with reference to embodiments shown in the drawings.

Figure 1 is a system diagram showing the connection state between the flat air mat body and the air supply mechanism, and Figure 2 is A to A in Figure 1.
FIG. 3 is an enlarged linear sectional view and a partially vertical front view showing one example of the distributor in detail.

First, in Fig. 1, 1 is an air mat body, 11,
12 and 13 are narrow first, second, and third air chambers regularly arranged alternately in a zigzag pattern; 3 is an air blowing hole drilled in the upper surface of the third air chamber; Each part of the air mat body shown in Fig. 1 is given the same reference numeral.

The feature of the present invention lies in the structure of the air supply mechanism 20, in which one pump 21 is disposed, and the discharge side of the pump 21 is branched into two circuits, one of which is A pressure control valve 23 is installed on one side of the
A distributor 24, which will be described later, is connected through a pipe 26. In addition, the other branch circuit has a flow control valve 2.
5 are connected. Note that the pump 21 is a suitable pressurized air pump or compressor, such as a rotary type or a reciprocating type. Further, two pipes 27 and 28 coming out from the distributor 24 are connected to the first air chamber 11, respectively.
and the second air chamber 12 , and the flow rate control valve 25 is connected to the third air chamber 23 through a pipe 29 .

For example, a pressure reducing valve or a relief valve is used as the pressure control valve 23. When using a pressure reducing valve, the set pressure can be changed by turning the handle, and the balance between the pressure in the diaphragm chamber and the elastic force of the spring that presses the diaphragm is adjusted, and the pressure on the primary side is adjusted. and pressurized air flows into the secondary side,
When the diaphragm chamber is pressurized by the air flowing to the secondary side, when the pressure within the chamber reaches equilibrium with the elastic force of the spring, the valve is closed to prevent air from flowing into the secondary side. When the action is performed and the pressure in the diaphragm chamber decreases, the valve closes again and pressurized air flows into the secondary side.

For example, a throttle valve is used as the flow rate control valve 25. This throttle valve uses a mechanically operated throttle valve that mechanically changes the area of the air passage inside the valve when the air pressure exceeds a predetermined value, and an exhaust valve that changes the flow rate of air discharged from the exhaust port by adjusting a screw-in throttle mechanism. A throttle valve is used, and as the opening of the throttle section increases, the flow rate increases. Further, the adjustment can be made manually.

Next, one example of the distributor 24 will be explained with reference to FIG. 30 is a synchro motor, and a rotating plate 33 having a locking portion 32 is fixed to a drive shaft 31 of the motor 30. Reference numeral 34 denotes a cylindrical rotating member having a smooth surface 35 on the upper surface, and a cutout groove 36 formed in the rotating member 34 is engaged with the locking portion 32, and the rotating member 34 is loosely attached to the rotating plate 33 and then applied. The compressed air is released into the atmosphere, and a communication groove 37 is formed in the smooth surface 35 of the rotating member 34 in the radial direction from the center. Reference numeral 38 denotes a circular fixing member. The fixing member 38 is fixed to a frame 39 to which the motor 30 is attached, and a smooth surface 40 is formed on the lower surface of the fixing member 38. , an air supply hole 41 is formed for feeding pressurized air discharged from the pump 21 to an even number of distribution holes 44, and the air supply hole 41 is configured to feed pressurized air from the pump 21 to the distributor 24 via the pressure control valve 23. It communicates with an introduction part 42 that connects to a pipe 26 for pressurized air.

In the distributor 24 of FIG. 3, the synchro motor 30 rotates at a low speed, and the rotating member 34 slides with its smooth surface 35 maintaining close contact with the smooth surface 40 of the fixed member 38 via the rotating plate 33. Rotate. Therefore, the two exhaust holes provided in the fixed member 38 communicate with the communication groove 37 alternately, and the communication groove 37 connects to the exhaust hole.
The pressurized air sent from the pump 21 via the
Connection port 4 of connection socket 43 at a predetermined timing.
4 to the pipes 27 and 28, and the first and second air chambers 11 and 12 are alternately expanded and contracted.

Next, the action will be explained.

A part of the pressurized air discharged from the pump 21 reaches the pressure control valve 23, is controlled to a predetermined pressure by the control valve 23, and is sent to the distributor 24 through the piping 26,
The pressurized air alternately supplied to the pipes 27 and 28 by the distributor 24 alternately expands and contracts the first and second air chambers 11 and 12. Note that if the air chamber on the side where air is not supplied is in communication with the atmosphere, it will be crushed by the weight of the person lying on the air mat, return through the distributor 24, and be released into the atmosphere through the notch groove 36. .

A part of the air discharged from the pump 21 also reaches the flow rate control valve 25, and the flow rate is adjusted by the control valve 25 to adjust the flow rate from the jet hole 3 according to the user's preference and physical condition. An appropriate amount of air is continuously blown out from the air blowing holes 3 on the upper surface of the air mat body 1 which repeats wave motion by adjusting the blowing flow rate, thereby drying the skin of the patient.

(Effects of the invention) This invention allows the flow rate of the pressurized air supplied to the third air chamber to be adjusted using a flow control valve, so pressurized air can be supplied or turned off simply by turning on and off. Compared to conventional devices that sometimes stop, the skin drying air is ejected regardless of the wave motion of the first and second air chambers, and air can be ejected at an appropriate flow rate. Therefore, according to the present invention, the air ejected from the upper surface of the air mattress body can be adjusted according to the physical condition and preference of the person sleeping on the air mattress body, and the air can be ejected from the air outlet holes, thereby preventing conventional bed sores. Unlike other devices, the body temperature of a sleeping patient or the like can be taken into account to prevent, for example, excessive air ejection. In addition, with this invention, by adjusting the air flow rate, the third air chamber can be maintained in a constantly inflated state with almost no air being ejected from the air outlet, so the first air chamber and the second air chamber are alternately activated at one time. It also has the effect of not causing anxiety to the sick person even when it contracts.

[Brief explanation of the drawing]

Figures 1 to 3 show embodiments of the present invention;
The figure is a system diagram showing the connection state between the mat body and the air supply mechanism, Figure 2 is an enlarged cross-sectional view taken from line A to A in Figure 1, and Figure 3 is a partially longitudinal front view showing an example of the distributor. , FIG. 4 is a system diagram showing a connection state between an air supply mechanism and a mat body showing a conventional bedsore prevention device. Explanation of the main parts of the figure, 1... flat air mat body, 3... air outlet, 11... first air chamber, 12
...Second air chamber, 13...Third air chamber, 21...Pump, 23...Pressure control valve, 24...Distributor, 25
...Flow control valve, 26, 27, 28, 29...Piping.

Claims (1)

[Scope of utility model registration request] A flat mat body is configured with a narrow zigzag-shaped third air chamber having an air jet hole on the upper surface, and a first air chamber and a second air chamber that are expandable and contractible and partitioned by the third air chamber. At the same time, one pump is provided, and piping is arranged so that air whose pressure is adjusted by a pressure control valve is alternately supplied from the pump to the first and second air chambers via a distributor, and the third air chamber is A bedsore prevention device comprising piping so that air whose flow rate is adjusted by a flow rate control valve is supplied from the pump to the air chamber.