JPS5942020Y2 - Bedsore prevention mats - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a decubitus-sore prevention mat that prevents decubitus ulcers from healing due to long-term bed rest.

People who are unable to move on their own, such as severely disabled patients, patients who are on absolute bed rest after surgery, or bedridden elderly people, may experience changes in body pressure distribution in the back, lower back, buttocks, or legs while lying in bed for a long period of time. Especially in high places, bulges occur due to blood circulation disorder,
The problem arises that physical pain becomes extremely great.

In order to solve this problem, it is necessary to prevent areas with high body pressure distribution from being fixed at a constant level so that blood circulation is not obstructed.

Therefore, conventionally, a mat with an internal space divided into two air chambers is used, and the support point of the body is changed by alternately introducing and removing air from the two air chambers.

However, conventional mats form two air chambers by alternately separating the length or width of the mat parallel to one side of the mat.

Therefore, when two air chambers are separated parallel to the length direction of the mat, the air chamber on the side to which no air is supplied will be continuous along the entire length of the mat, and On the other hand, when two air chambers are separated in parallel, the air chamber on the side to which air is not supplied is continuous over the entire widthwise length of the mat.

Therefore, a part of the user's body tends to fall into the contracted area where air is not continuously supplied in the length or width direction of the mat, making the support state of the body unstable and causing serious damage to the user. There is a risk of causing pain.

For example, if the two air chambers are separated parallel to the length direction of the mat, the user's hands and feet may easily fall into the contracted area, and the air chambers are separated parallel to the width direction. In some cases, the head, buttocks, or heels of the feet tend to fall into the contracted area.

This idea was made based on the above circumstances, and its purpose was to divide the inside of the mat into two parts so that there would be no continuation of areas that contracted due to lack of air supply in the length or width direction of the mat. To provide a bed-slap prevention mat which is separated into air chambers and can support a user's body in a stable state.

An embodiment of this invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is a mat. The internal space of this mat 1 is
The air chamber 2 is divided into a second air chamber 2 and a second air chamber 3, and these air chambers 2 and 3 expand when air is supplied and contract when air is removed.

The first air chamber 2 and the second air chamber 3 each have a distribution section 4.
, 4 and a plurality of branch portions 5 having a shape of a large number of continuous rectangular corner portions.

That is, each distribution section 4, 4 is formed in an L-shape along two sides of the mat 1, and one end of the distribution section 4, 4 is communicated with a branch section 5....

1st. The branch portions 5 of the second air chambers 2.degree. 3 are formed so as to be inclined with respect to one side of the mat 1 and separated from each other alternately.

Further, the first air chamber 2 and the second air chamber 3 are provided with connection ports 6, 6, respectively, and an air pump 8 is connected to these connection ports 6.6 via a three-way switching valve 7. ing.

The three-way switching valve 1 is shown in FIG. 3a. It is constructed as shown in b and c.

That is, a storage part 10 is formed in the valve body 9, and a movable shaft 13 having two valve bodies LL12 is provided in the storage part 10 so as to be slidable with both ends protruding from both end surfaces of the valve body 9. ing.

This movable shaft 13 is normally positioned in the state shown in FIG. 3a by two springs 13a, 13a.

A first solenoid 14 and a second solenoid 15 are provided on both end faces of the valve body 9, respectively.

These solenoids 14 and 15 are composed of a coil 16 and a plunger 17, and when the plunger 17 is attracted by the coil 16, the movable shaft 13 is driven.

The valve body 9 has a supply port 18 connected to the discharge side 8a of the air pump 8, and a suction side 8b of the air pump 8.
The first and second suction ports 19, 20 connected to the first
The first communication port 2 connected to the connection port 6 of the air chamber 2 of
1 and a second communication port 22 connected to the connection port 6 of the second air chamber 3 are formed.

Note that the first and second communication ports 21, 22 are branched into supply sides 21a, 32a and suction sides 21b, 22b.

When the first and second solenoids 14 and 15 are not in operation, the supply port 18 is connected to the first and second communication ports 21, 22 via the storage portion 10, as shown in FIG. 3a.
Since it is in communication with the supply sides 21a and 22a' of
Compressed air from an air pump 8 is supplied to the first air chamber 2 and the second air chamber 3.

Further, when the first solenoid 14 is activated and the movable shaft 13 is driven.

As shown in FIG. 3, the supply port 18 communicates with the supply side 22a of the second communication port 22, and the first suction port 19
communicates with the suction side 21b of the first communication port 21, so air is removed from the first air chamber 2 and compressed air is supplied to the second air chamber 3.

Furthermore, when the second solenoid 15 is actuated and the movable shaft 13 is driven in the opposite direction, the supply port 18 communicates with the supply side 21a of the first communication port 21 as shown in FIG. 3C. , the second suction port 20 is connected to the second communication port 22
The compressed air is supplied to the first air chamber 2 and air is removed from the second air chamber 3.

Further, a first check valve 23 with one end open to the atmosphere is connected to the pipe line connecting the suction side 8b of the air pump 8 and the first and second suction ports 19.20. 1t or when air is removed from the second air chambers 2 and 3, when the pressure in the air chambers 2 and 3 falls below a predetermined pressure, the first check valve 23 opens and the air pump 8 sucks the atmosphere. It has become.

Further, second and third non-return checks are provided in the conduit connecting the first communication port 21 and the first air chamber 2 and the conduit connecting the second communication port 22 and the second air chamber 3, respectively. Valve 24°25
The check valves 24 and 25 are connected at one end, and the other ends of these check valves 24 and 25 are connected to a pressure switch 26.

When compressed air is supplied to the first or second air chambers 2, 3 and the pressure in these air chambers 2, 3 exceeds a predetermined value, the second or third check valve 24.25 is opened, the pressure switch 26 is activated, and the motor 27 that drives the air pump 8 is stopped.

The three-way switching valve 7, that is, the first and second solenoids 1
4.15 is controlled by the control section 28.

This control section 28 is configured as follows.

That is, the first timer 31 is connected to the first relay 3 between the first power line 29 and the second power line 30 connected to the power source.
The first relay 32, the second timer 34 and the ratchet relay 35 are connected via the first normally open contact 36 of the first relay 32 and the first normally closed contact 33 of the first relay 32, and It is connected via the contact 37 of the timer 31.

The contact point 37 of this first timer 31 is connected to the first timer 31.
It is designed to close when the timer expires.

Further, a contact 38 that opens when a second timer 34 times up is connected in series to the first relay 32.

Further, the first contact 40 and the second contact 41 of the ratchet relay 35 are connected in parallel between the first and second power supplies 29 and 30 via the second normally open contact 39 of the first relay 32. It is connected to the.

The first solenoid 14 is connected in series to the first contact 40, and the second solenoid 14 is connected to the second contact 41 in series.
5 are connected in series.

Note that the first solenoid 14 and the second solenoid 15 are provided with first and second lamps 42. to indicate their operation.
43 are connected in parallel.

Furthermore, the motor 27 of the air pump 8 is connected to the first and second motors.
The power supply lines 29 and 30 are connected via a pressure switch 26.

The reference numeral 44 in the figure is an interlock switch for applying voltage between the first and second power lines 29 and 30.

Next, the operation of the above configuration will be explained.

First, the operating time of the first timer 31 and the second timer 34 is set.

For example, the first timer 31 is set to 2 minutes, and the second timer 34 is set to 5 minutes.

When the interlocking switch 44 is closed, the motor 27 is activated, and since the normally closed contact 33 of the first relay 32 is closed, current flows therethrough and the first timer 31 starts operating.

Since the contact point 37 of the first timer 31 does not close when the first timer 31 times up, two minutes have passed since it started operating! In this case, the first relay 32 is not energized.

Therefore, during that time, the first and second solenoids 14.1
5 is not operated, the movable shaft 13 of the three-way switching valve 1 is not driven as shown in FIG. .

22a.

Therefore, the compressed air from the air pump 8 is transferred to the mat 1.
Since the mat 1 is supplied to the first air chamber 2 and the second air chamber 3, the entire mat 1 expands and supports the user's body.

In this state, the set time of the first timer 31 is 2.
When the minute has elapsed, the contact 37 closes, thereby activating the first relay 32, ratchet relay 35 and second timer 34.

When the first relay 32 and the ratchet relay 35 are activated, the normally open contacts 36 and 39 of the first relay 32 and the first contact 40 of the IJ relay 5 are closed and the first relay 32 is normally closed. Contact 33 opens.

Therefore, the first solenoid 14 is energized and its plunger 17 is attracted to the coil 16, so that the movable shaft 13 of the three-way switching valve 7 is displaced as shown in FIG.

Due to such displacement of the movable shaft 13, the supply side 22a of the second communication port 22 is in a state of communicating with the supply port 18, but the supply side 21a of the first communication port 21 is connected to the first valve body 11. is closed, and the suction side 21b is the first
It communicates with the suction port 19 of.

Therefore, since air is removed from the first air chamber 2 of the mat 1 connected to the first communication port 21, this first
The second air chamber 2 contracts, and only the second air chamber remains expanded.

That is, the user can be supported only by the second air chamber 3.

In this state, the set time of the second timer 34 is 5.
When the contact 38 opens after a minute has elapsed, the first relay 32
is cut and the first and second normally open contacts 36 and 39 open,
Normally closed contact 33 closes.

Further, when the first normally open contact 36 of the first relay 32 opens, the ratchet relay 35 is also disconnected, and when the normally closed contact 33 of the first relay 32 closes, the first timer 31 starts operating.

When the second normally open contact 39 of the first relay 32 opens, the first and second solenoids 14 of the three-way switching valve 1 are opened.
．． 15 are not energized, the three-way switching valve 1 is in the state shown in FIG. 3a.

Therefore, compressed air is supplied again to the first air chamber 2 of the mat 1, which was previously deflated and contracted, and the mat 1 expands.
The user is supported by the first and second air chambers 2 and 3.

In this state, the set time of the first timer 31 is 2.
When the contact 31 closes after a minute has elapsed, the first relay 3
2 operates and its first normally open contact 36 closes, so the second timer 34 starts operating and the ratchet,
Relay 35 also operates.

When this ratchet relay 35 operates again,
Since the second contact 41 is now closed, the second solenoid 15 of the three-way switching valve 7 connected in series with the second contact 41 is energized.

Therefore, the movable shaft 13 of the three-way switching valve 7 is displaced as shown in FIG.
2 has its supply side 22a blocked by the second valve body 12 and its suction side 22b communicating with the second suction port 20.

Therefore, compressed air is supplied to the first air chamber 2 of the mat 1 and air is removed from the second air chamber 3, so that the user's body is supported only by the first air chamber 2.

When this state continues for 5 minutes and the second timer 34 times up, compressed air is supplied to the first and second air chambers 2 and 3 again as described above, and the entire mat 1 is expanded and used. Supporting others is repeated.

That is, according to the above configuration, the first air chamber 2 and the second air chamber 3 repeat expansion and contraction alternately, so the support point of the user's body is not fixed, so that the user's body is not fixed, so that the user's body is not fixed. Bed sore healing can be prevented.

In addition, when switching the supply of compressed air to the first air chamber 2 and the second air chamber 3, both air chambers 2,
Since compressed air is supplied to the mat 3 and then the air is removed from one of the air chambers, there is no possibility that the state of support of the user by the mat 1 becomes unstable and causes pain to the user during the switching. .

When supplying compressed air to the first air chamber 2i or the second air chamber 3, if the pressure in these air chambers 2, 3 rises too much, the second check valve 244 or the third The check valve 25 opens, the pressure switch 26 operates, and the motor 27 that swings the air pump 8 is stopped.
, 3 can be kept constant at all times.

Furthermore, when air is removed from the first and second air chambers 2 and 3, when the pressure in these chambers 2 and 3 falls below a predetermined level, the first check valve 23 opens and sucks out the atmosphere. , the air pump 8 is protected.

Further, the branching portions 5 between the first air chamber 2 and the second air chamber 3 of the mat 1 are inclined with respect to one side of the mat 1 and are alternately separated. Air chamber 2 or 2nd
There is no place where the air chambers 3 are continuous over the entire width or length of the mat 1.

Therefore, when either air chamber contracts,
Since the contracted area does not cover the entire width or length of the mat 1, a part of the user's body may fall into the contracted area of the mat 1.

Note that this invention is not limited to the above embodiment; for example, the setting times of the first timer and the second timer are not limited to 2 minutes and 5 minutes, and the setting time of the first timer is longer. By doing this, you can lengthen the time for simultaneously supplying air to both the first and second air chambers, and by lengthening the setting time of the second timer, you can lengthen the time to supply air to only one of the air chambers. It is clear that it is possible to make it longer.

It is clear that the same effects as in the above embodiment can be obtained even if two three-way switching valves are used instead of the three-way switching valve.

As described above, this invention has a first air chamber and a second air chamber that are formed separately inside the mat, and a plurality of air chambers that are inclined with respect to one side of the mat and that are alternately formed. It was intercepted by the branch of the.

Therefore, when one of the air chambers is contracted, the contracted points will not be continuous in the length or width direction of the mat, so a part of the user's body will not fall into the contracted points. Therefore, there is an advantage that the support state of the user by either one of the expanded air chambers can be stabilized.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a plan view of the mat, Fig. 2 is an overall configuration diagram for controlling air supply to the mat, and Fig. 3 a, b, and c are three-sided views. FIG. 4, which is an explanatory diagram of the operation of the switching valve, is a time chart diagram of the first solenoid and the second solenoid that control the three-way switching valve. 1... Mat, 2... First air chamber, 3... Second
air chamber, 5...branch.

Claims (1)

[Scope of utility model registration request] In an anti-bedsore mat whose interior is separated into a first air chamber and a second air chamber, the first air chamber and the second air chamber are each inclined with respect to one side of the mat. A mat for preventing bedsores, characterized by comprising a plurality of alternately formed branch parts.