JPH0345710Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an air mattress, particularly an air mattress suitable for use as a bed for bedridden elderly people or seriously ill people.

(Prior art) Air is blown out from a number of air ejection holes provided on the top surface, and the upper air chamber is designed to prevent bedsores and the mat is kept in an inflated state to give appropriate hardness and cushioning properties. An air mat having an upper and lower two-layer structure with a lower air chamber is described in Japanese Utility Model Publication No. 52-43195 and Japanese Patent Application Laid-Open No. 51-74492.

(Problem to be solved by the invention) After the lower air chamber of the air mat described in the above two publications is filled with air, the air is sealed with a stopper, and the air pressure can be easily controlled. It is not possible to freely select the hardness of the mat by adjusting it. Especially for long-term care patients, the hardness and cushioning properties of pine can help prevent pressure ulcers.
Since this has a subtle effect on the occurrence and treatment of the mat, there is a strong demand for something that allows the hardness and cushioning properties of the mat to be easily adjusted by a simple operation by a medical person or the like.

The inventor of the present invention not only allows medical patients and others to freely adjust the amount of air ejected from the upper air chamber, but also easily adjusts the air pressure of the upper and lower air chambers to achieve the desired hardness and cushioning properties of the mat. It is an object of the present invention to provide an air mat that can prevent bedsores and improve sleeping comfort.

(Means for solving the problem) The present invention consists of two independent air chambers, upper and lower. The upper air chamber blows out air at a desired flow rate from the pores on its upper surface, and the lower air chamber blows out air at a desired air pressure. In a double-walled air mat with a sealed structure that maintains an inflated state, the upper air chamber and the lower air chamber are each connected to an air supply device consisting of an independent air pump and air supply pipe, and the air supply device for the upper air chamber The air pump has a variable output mechanism that sets and adjusts the air pressure in the upper air chamber and the amount of air ejected from the pores, and the air pump in the air supply device for the lower air chamber sets and adjusts the air pressure in the lower air chamber. This air mat is characterized by being equipped with a variable output mechanism.

Preferably, the present invention is characterized in that the air pump constituting the air supply device for the lower air chamber is equipped with an air pressure setting adjustment mechanism that detects the air pressure in the lower air chamber and automatically adjusts the air pressure to a set air pressure. It is an air mat. More preferably, the air pump constituting the air supply device for the lower air chamber is provided with a mechanism for operating the pump at high output up to the initial set air pressure, and an air pressure setting adjustment mechanism for finely adjusting the air pressure to the final set air pressure. This is an air mat with special features.

Hereinafter, the present invention will be explained in detail with reference to the drawings, but the present invention is not limited to the following examples.

FIG. 1 is a schematic diagram showing an example of the air mat of the present invention.

First, the air mat of the present invention is made of an airtight sheet, such as a synthetic resin sheet, a synthetic gun resin sheet, or a sheet laminated with a film and fabric, and has an upper air chamber 1 having pores 3 for blowing out air, and a sealed structure. The lower air chamber 2 is integrated with the lower air chamber 2 to form an air mat.

Independent air pumps 4 and 6 are connected to the upper air chamber 1 and lower air chamber 2 via respective air supply pipes 5 and 7, and air is sent to each of them to inflate the upper air chamber and to inflate the upper air chamber. Air is ejected from the pores 3 on the upper surface to maintain the lower air chamber in an expanded state.

The air pump 4 that supplies air to the upper air chamber 1 is equipped with a setting regulator 8 for setting the air pressure in the upper air chamber 1 and the amount of air blown out from the pores 3. The setting regulator 8 has a function to vary the output by voltage or frequency to the pump, and the user can adjust this to maintain the air discharge pressure and flow rate from the air pump at preset values, and the upper air chamber The air pressure and amount of air ejected can be adjusted and kept constant.

On the other hand, the air pump 6 for the lower air chamber also has a variable output function by voltage or frequency, similar to the one for the upper air chamber, and sets and adjusts the discharge pressure and flow rate of air from the air pump, and adjusts the air pressure in the lower air chamber 2. It has an air pressure setting regulator 9 that can be set and adjusted. According to this mechanism, air is continuously supplied from the pump 6 at a predetermined pressure and flow rate according to the output set by the user using the air pressure setting regulator 9. The hardness of the mat desired by the user can be maintained. The one shown in FIG. 2 further includes a pressure detector 10 for detecting air pressure in the air supply pipe 7 of the lower air chamber 2, and a converter 11 for changing the air pressure into an electric signal proportional to the air pressure. The control unit 12 performs electrical control based on the proportionality of a continuous signal from the air pressure setting regulator 9 and a signal set by the air pressure setting regulator 9.
will be established.

The voltage or frequency supplied to the air pump 6 is controlled by the control mechanism 13 consisting of the pressure detector 10, the converter 11, and the control unit 12, and the air pressure in the lower air chamber is adjusted by the air pressure setting regulator 9. can be controlled and maintained more precisely and automatically at the set pressure.

Fig. 3 shows the lower air chamber pump 6 being operated at high output until the initial set pressure is reached, the lower air chamber 2 is rapidly inflated to a certain degree of mat hardness, and then gradually inflated to the final set pressure. This figure shows a particularly preferred air mat of the present invention that is equipped with a mechanism for quickly inflating the air mat without damaging it.

In FIG. 3, the air supply pipe 7 to the lower air chamber 2 is designed to detect the initial air pressure in the lower air chamber. For example, it includes a diaphragm type pressure switch 14 and a final air pressure setting regulator 15 (having the same mechanism as 9 in FIG. 1 etc.).

The lower air chamber air pump 6 operates at high output at the beginning of operation. When the air pressure in the lower air chamber reaches the set initial air pressure, this is detected by the diaphragm type pressure switch 14, the relay is activated by the signal, and the air pump is then operated at the output set by the final air pressure setting regulator 15. 6 is driving,
The discharge pressure flow rate from the air pump is maintained at a predetermined value, and the lower air chamber 2 is maintained at a desired pressure by a mechanism similar to that described in FIG.

More specifically, FIG. 3 shows an electric circuit diagram of the control system of the air mat of the mechanism, and FIG. 4 shows an example of the electric circuit diagram, and its operation will be explained.

When the power switch S is turned on, the air pump 4 for the upper air chamber is operated with the output from the air pressure in the upper air chamber 1 made up of a variable resistor R _a and the setting regulator 8 for the amount of air blown out from the pores 3, and the lower air The room air pump 6 is operated at high output by the B contact relay R _YB .

Next, when the preset initial pressure in the lower air chamber is detected by the diaphragm pressure switch 14, the relay R _Y operates, and the first A contact relay
R _YA1 and the second A contact R _YA2 close the circuit, B contact relay R _YB opens the circuit, and the air pump 6 operates at the pressure set by the final air pressure setting regulator 15 consisting of a variable resistor R _b .

(Effects of the invention) The air mat of the invention allows the user to control the air mat's hardness and cushioning properties depending on the amount of air ejected from the pores on the upper surface of the upper air chamber and the air pressure in the upper and lower air chambers. It can be adjusted independently and freely as desired to change the condition between the human body and the mat surface and the condition of the air hitting the human body, thereby increasing the effect of preventing bedsores.

In particular, the air mat of the present invention has a thick lower air chamber that creates a mat shape that follows the rough contours of the body, and an upper air chamber that softly contacts the entire body, making it easier for the body to come into contact with the mat. It has a large area and has a very good body pressure dispersion effect. It is also extremely comfortable to sleep on, as the whole body receives even and appropriate pressure from the mattress, and seasickness does not occur. Therefore, it can meet a wide range of needs, from prevention and treatment of pressure ulcers for long-term care patients to good sleep for healthy people.

[Brief explanation of the drawing]

1 to 3 are schematic diagrams showing an example of the mechanism of the air mat of the present invention, and FIG. 4 is an electric circuit diagram in FIG. 3. 1: Upper air chamber, 2: Lower air chamber, 3: Pore,
4: Air pump for upper air chamber, 5: Air supply pipe for upper air chamber, 6: Air pump for lower air chamber, 7:
Air supply pipe for the lower air chamber, 8: Setting regulator for air pressure and amount of air blown out from the pores, consisting of an air pump output variable mechanism for the upper air chamber, 9: Air pressure setting consisting of an air pump output variable mechanism for the lower air chamber regulator, 13: control mechanism for automatic air pressure adjustment including a pressure detector, etc., 14: diaphragm type pressure switch, 15: final air pressure setting regulator.

Claims (1)

[Claims for Utility Model Registration] 1. Consisting of two independent upper and lower air chambers, the upper air chamber blows out a desired flow rate of air from the pores on its upper surface, and the lower air chamber is inflated at a desired air pressure. In the double-structured air mat, which has a sealed structure that maintains airtightness, the upper air chamber and lower air chamber are each connected to an air supply device consisting of an independent air pump and air supply pipe.
The air pump of the air supply device for the upper air chamber sets the air pressure in the upper air chamber and the amount of air ejected from the pores.
An air mat characterized in that the air pump of the air supply device for the lower air chamber is equipped with a variable output mechanism that sets and adjusts the air pressure in the lower air chamber. 2 Request for registration of a utility model characterized in that an air pump constituting an air supply device for a lower air chamber is equipped with an air pressure setting adjustment mechanism that detects the air pressure in the same chamber and automatically adjusts the air pressure to a set air pressure. The air mat according to item 1 of the range. 3. A practical use characterized in that the air pump constituting the air supply device for the lower air chamber is equipped with a mechanism for operating the pump at high output up to the initial set air pressure, and an air pressure setting adjustment mechanism for finely adjusting the air pressure to the final set air pressure thereafter. Scope of claims for patent registration, Paragraph 1 or 2
The air mat described in section.