JP3109216B2 - Bedtime equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed apparatus for preventing bedsores.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional sleeping device of this type comprises a flexible pipe 3 provided with a large number of pores 2 and arranged in a zigzag manner in a permeable mat 1 as shown in FIG. It is composed of

[0003] By supplying a small amount of air from the protruding end 4 side of the pipe 3, air is passed through the mat 1 from the large number of pores 2 to flow a breeze between the sleeping person and the mat.
It has been designed to prevent bedsore (for example, Japanese Patent Publication No. 61-4524).

[0004]

However, in the above-mentioned conventional configuration, when the sleeping person is a bedridden elderly person, it is often impossible to operate the air blowing operation by himself, and a nurse is required. At that time, the nurse must perform a blowing operation for the sleeping person, and in this case, there is a problem that the operation is complicated and the operation may be forgotten. For this reason, a method of performing automatic operation using a timer is conceivable, but in order to prevent bedsores, it is desirable to perform a blowing operation by knowing a sleeping state such as whether or not a sleeping person is turning over. However, with the conventional method using a timer, it is not possible to know the sleeping state, and if it is desired to do so, some kind of detector must be attached to the body of the sleeping person. In this case, there is a problem that sleep is hindered by wearing the detector.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to detect a body motion without causing a detector or the like to come into direct contact with a sleeping person's body and operate a blower to prevent bedsore. It is.

[0006]

In order to achieve the above object, the present invention provides a mat having a hollow interior and a large number of air blowing holes on its surface, a blower unit having a blower for blowing air to the mat, Body movement detecting means provided on the mat to detect and distinguish between coarse body movement such as turning over of a sleeping person and fine movement such as heartbeat and breathing, and a timer that measures the duration of a signal of only the fine movement. And control means for controlling the blower in accordance with the continuation time.

[0007]

According to the present invention, the sleeping state is known by the body movement detecting means detecting the body movement of the sleeping person. That is, when the sleeping person is performing rough movement such as turning over, the blower is stopped because bed slippage is unlikely to occur. However, if the sleeping person continues to be in a limb-moving state with only heartbeat and breathing (so-called turning over, etc.)
The duration of the state is measured by a timer, and when a predetermined time is reached, the blower is operated via the control means to prevent bedsore.

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 5 denotes a mat made of a cylindrical cushioning material 6, which is sewn to an air-impermeable cloth 7 at the periphery. The cushion member 6 has a groove 8 and a groove 9 formed on the front surface and the rear surface, respectively, and the groove 9 on the rear surface communicates with the cavity 10 inside the fabric 7 in the peripheral portion. The groove 8 on the surface has a number of air outlets 11 communicating with the cavity 10. Reference numeral 12 denotes a blower unit having a blower 13 therein.
Are connected. 16 is an air suction port.

Next, the structure of the body movement detecting means 17 will be described with reference to FIGS. In the figure, reference numeral 18 denotes a body movement detecting element made of a piezoelectric element,
F) or the like is formed into a thin film, and a flexible electrode film is adhered to both surfaces of the thin film and formed into a tape shape, and is disposed inside the mat 5. Reference numeral 19 denotes a signal processing circuit, which includes a low-pass filter 20, an amplifier 21, and a rectifier 2.
2, an integrator 23 and a comparator 24.

In the above configuration, when a human body is present on the mat 5, the body motion detecting means 17 is deformed by the body motion of the human body on the mat 5, such as heartbeat, breathing, and turning over, and the voltage due to the piezoelectric effect is reduced. Occur. Then, only a predetermined frequency component of the generated voltage output passes through the low-pass filter 20, is amplified and rectified, and is then integrated by the integrator 23. FIG. 4 shows an output signal of the integrator 23 in an actual situation. As shown in the figure, there is a large output when rough body movement such as entering the bed, leaving the bed, turning over, etc. An output is obtained, and the output becomes zero when the user is out of bed. That is, as long as the human body is present on the mat 5 at bedtime, at least a low-level output can be obtained by the above-mentioned minute movement of the human body accompanying heartbeat and respiration. Utilizing this fact, the comparator 24 determines that the subject is in the fine body movement state if the output signal of the integrator 23 is within the range of Va and Vb shown in FIG. Then, the duration of the fine body movement is measured by the timer 25, and when the duration reaches a certain time,
The blower 13 is operated via the control means 26 to prevent bedsore.

Since the body movement detecting element 18 is flexible in a thin film form, it can be attached to bedding and does not hinder natural sleep by attaching a detector or the like to a sleeping person's body.

[0013]

As described above, according to the sleeping installation of the present invention, the following effects can be obtained.

(1) Since the body movement is detected by the body movement detecting means and the blower is controlled, it is possible to prevent the bedsore by performing the blowing operation according to the sleeping state of the sleeping person.

(2) Since the body movement detecting means is used, the natural sleep of the sleeping person is not hindered.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a bed apparatus according to an embodiment of the present invention.

FIG. 2 is a control block diagram of the apparatus.

FIG. 3 is a control block diagram of a body movement detecting unit of the apparatus.

FIG. 4 is an output waveform diagram from an integrator of the on-bed determination means in the apparatus.

FIG. 5 is an external perspective view of a conventional bed apparatus.

[Explanation of symbols]

 5 Mat 10 Cavity 11 Air outlet 12 Blowing unit 13 Blower 17 Body movement detecting means 25 Timer 26 Control means

Claims (1)

(57) [Claims] 1. A mat having a hollow inside and a large number of air outlets on its surface, a blower unit having a blower for blowing air to the mat, and a coarse body movement provided on the mat such as turning over of a sleeping person. And body movement detecting means for distinguishing and detecting fine body movement such as heartbeat respiration, a timer for measuring the duration of a signal of only the fine body movement, and control means for controlling the blower according to the duration. Bedtime device consisting of.