CN209059754U - Negative pressure air cushion - Google Patents

Abstract

The utility model relates to the technical field of medical devices, and discloses a negative pressure air cushion, which comprises an air bag and an air cushion, the air cushion is connected with the air bag, the air cushion is provided with a first cavity, and the air bag is provided with a second cavity; A first exhaust passage is arranged between the airbag and the second cavity, a first one-way air valve is arranged in the first exhaust passage, a second exhaust passage is arranged on the airbag, and a second exhaust passage is arranged in the second exhaust passage. One-way air valve. The negative pressure air cushion provided in this embodiment does not need to be equipped with a special air extraction device. By directly pressing the airbag connected to the air cushion, the atmospheric pressure in the second cavity in the airbag is changed through the contraction and rebound of the airbag, so that the second cavity and A pressure difference is formed between the outside world and the first cavity. The first one-way air valve and the second one-way air valve are opened and closed under the action of the pressure difference. The air cushion is used for vacuuming or vacuuming, and it is easy to carry.

Description

Negative pressure air cushion

technical field

The utility model relates to the technical field of medical instruments, in particular to a negative pressure air cushion.

Background technique

Negative pressure air cushion is used to provide fixed support for fractures and bone injury patients of different body types, and has a buffering effect on the transfer of patients. Improper and transfer process will cause secondary injury, prevent the broken end from stabbing muscles, nerves, blood vessels or organs and cause pain, bleeding, and even shock.

The negative pressure air cushion is initially soft. When using it, use a negative pressure air pump or an air pump to pump the air cushion, so that the air cushion is in a negative pressure state and gradually hardens. At the same time, it automatically shapes according to the contour of the injury, like a shell. Wrap the wound in place.

The existing negative pressure air cushions are equipped with a separate air suction cylinder. When using, the air suction cylinder or negative pressure air pump must be used to extract the negative pressure of the air cushion. In some emergency situations, it is often impossible to find a suitable pump In addition, the negative pressure air cushion needs to be equipped with a special air pump, which is not easy to carry.

Utility model content

The purpose of the utility model is to provide a negative pressure air cushion to solve the problem that the existing negative pressure air cushion needs to be equipped with a special air suction device, which brings inconvenience to both use and carrying.

In order to solve the above problems, the present invention provides a negative pressure air cushion, which includes an air cushion and an airbag, the air cushion is connected with the airbag, the air cushion is provided with a first cavity, and the airbag is provided with a second cavity ; A first exhaust passage is arranged between the first cavity and the second cavity, a first one-way air valve is arranged in the first exhaust passage, and a second row is arranged on the air bag an air passage, and a second one-way air valve is arranged in the second exhaust passage.

Further, one side of the air cushion extends outward to form a connecting belt, one side of the airbag is connected with the connecting belt, and the first exhaust passage is arranged on the connecting belt.

Further, the connecting strip and the airbag are connected by ultrasonic welding.

Further, both the first one-way air valve and the second one-way air valve include a valve seat and a valve body arranged in the valve seat, the top of the valve seat is provided with an air outlet, and the first one-way air valve The bottom end of the second one-way air valve is open to communicate with the second cavity, the air outlet of the first one-way air valve communicates with the first cavity, and the bottom end of the second one-way air valve is open to communicate with the outside atmosphere, The air outlet of the second one-way air valve communicates with the second cavity;

The valve body is hollow, the valve body is provided with an intermediate plate and a moving block, the intermediate plate is provided with an air passage, and the bottom of the moving block is provided with a valve sheet that covers the air outlet hole, The moving block passes through the middle plate and can move along the inner wall of the valve. There is a gap between the outer circumference of the moving block and the inner wall of the valve, and a spring is arranged between the moving block and the middle plate.

Further, the moving block includes a moving column and a support body, the bottom end of the support body is provided with a concave cavity, the valve plate is embedded in the concave cavity and extends toward the bottom surface of the support body, the spring The spring is sleeved on the moving column, one end of the spring abuts on the middle plate, and the other end abuts on the support body.

Further, a connecting seat is provided in the first exhaust passage, the bottom end of the connecting seat is connected with the air cushion, the bottom end of the valve seat is connected with the airbag, and the valve seat is connected with the air cushion The seat is connected by a thread.

Further, a sealing ring is provided at the threaded connection between the valve seat and the connecting seat.

Further, the airbag is made of fluororubber or elastic plastic.

Further, the outer layer of the air cushion is made of TPU material.

The utility model provides a negative pressure air cushion. By arranging a squeezable air bag on the air cushion, by squeezing the air bag, the atmospheric pressure in the second cavity is greater than the external atmospheric pressure, the second one-way air valve is opened, and the air bag is compressed. The gas is discharged to the outside world; stop pressing the airbag, the airbag will automatically rebound, at this time, the external atmospheric pressure is greater than the atmospheric pressure in the second cavity, the second one-way valve is closed, and at the same time, the atmospheric pressure in the first cavity is greater than the atmospheric pressure in the second cavity, the first A one-way air valve is opened, and the gas in the first cavity is discharged into the second cavity. When the atmospheric pressure of the first cavity is equal to the atmospheric pressure of the second cavity, the first one-way air valve is closed, and the airbag is squeezed several times. Repeat In the above-mentioned pumping operation, until the atmospheric pressure of the first cavity is equal to the atmospheric pressure of the second cavity and is close to a vacuum or negative pressure, the second one-way air valve will no longer be opened, and the airbag will no longer discharge gas to the outside world. The negative pressure air cushion provided by the utility model does not need to be equipped with a special air pumping device, and directly presses the airbag connected with the air cushion to realize the operation of vacuuming or vacuuming the air cushion, which is simple to operate and convenient to carry.

Description of drawings

Fig. 1 is the structural representation one of the negative pressure air cushion in the embodiment of the present utility model;

Fig. 2 is the second structural schematic diagram of the negative pressure air cushion in the embodiment of the present invention;

Fig. 3 is the structural schematic diagram 3 of the negative pressure air cushion in the embodiment of the present invention;

FIG. 4 is a partial enlarged view of A in FIG. 1 .

In the figure, 1, air cushion; 2, air bag; 10, first cavity; 20, second cavity; 11, first one-way air valve; 21, second one-way air valve; 12, connecting belt; 13, 111, valve seat; 112, valve body; 113, moving block; 114, middle plate; 115, spring; 116, connecting seat; 117, sealing ring; 1111, Air outlet; 1131, valve plate; 1132, support body; 1133, moving column; 1141, air passage.

Detailed ways

The specific embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a reference to the present utility model. limits.

1 to 4 , a negative pressure air cushion according to an embodiment of the present invention is schematically shown, including an air cushion 1 and an airbag 2 , the air cushion 1 and the airbag 2 are connected as a whole, and the air cushion 1 is provided with a first cavity The airbag 2 is provided with a second cavity 20; a first exhaust passage 13 is provided between the first cavity 10 and the second cavity 20, and the first exhaust passage 13 connects the first cavity 10 and the second cavity 20. Two cavities 20, a first one-way valve 11 is arranged in the first exhaust passage 13, a second exhaust passage 23 is arranged on the airbag 2, and the second exhaust passage 23 communicates with the second cavity 20 and the outside atmosphere, A second one-way valve 21 is provided in the second exhaust passage 23 .

The first one-way air valve 11 and the second one-way air valve 21 are both unidirectionally open valve plate structures. When a pressure difference is formed on both sides of the one-way air valve, the air valve can only be on the side with higher air pressure and lower air pressure. Open on one side, not reverse. That is, in this embodiment, only when the air pressure of the first cavity 10 is greater than the air pressure of the second cavity 20, the first one-way air valve 11 is opened, otherwise it is closed; similarly, only when the air pressure of the second cavity 20 When the air pressure is greater than the outside atmospheric pressure, the second one-way air valve 21 is opened, otherwise it is closed.

Specifically, by providing a compressible airbag 2 on the air cushion 1, by squeezing the airbag 2, the atmospheric pressure in the second cavity 20 is greater than the external atmospheric pressure, the second one-way air valve 21 is opened, and the gas in the airbag 2 is opened. Expel the outside world; stop pressing the airbag 2, the airbag 2 will automatically rebound, at this time, the external atmospheric pressure is greater than the atmospheric pressure in the second cavity 20, the second one-way valve 21 is closed, and at the same time, the atmospheric pressure in the first cavity 10 is greater than the second one At the atmospheric pressure in the cavity 20, the first one-way air valve 11 is opened, and the gas in the first cavity 10 is discharged into the second cavity 20. When the atmospheric pressure of the first cavity 10 is equal to the atmospheric pressure of the second cavity 20, The first one-way air valve 11 is closed, the airbag 2 is squeezed several times, and the above-mentioned pumping operation is repeated until the atmospheric pressure of the first cavity 10 is equal to the atmospheric pressure of the second cavity 20 and is close to vacuum or negative pressure, the second one-way The air valve 21 is no longer opened, and the air bag 2 no longer discharges gas to the outside.

The negative pressure air cushion 1 provided in this embodiment does not need to be equipped with a special air extraction device. By directly pressing the airbag 2 connected to the air cushion 1, the atmospheric pressure in the second cavity 20 in the airbag 2 is changed through the contraction and rebound of the airbag 2. , so that a pressure difference is formed between the second cavity 20 and the outside world and the first cavity 10. The first one-way air valve 11 and the second one-way air valve 21 are opened and closed under the action of the pressure difference. The air cushion 1 can be evacuated or negatively pressured by being equipped with a special air extraction device, and it is convenient to carry.

In this embodiment, the airbag 2 is made of fluorine rubber or elastic plastic, which can be squeezed and rebounded, and the airbag 2 can be designed into different shapes according to actual needs. The outer layer of the air cushion 1 is made of TPU material. TPU (Thermoplastic polyurethanes) is thermoplastic polyurethane elastomer rubber. The TPU fabric has good wear resistance, is easy to clean, and is not easy to be polluted. It can be used repeatedly and is suitable for various emergency situations. Rescue work, and does not affect X-ray imaging and magnetic resonance examination.

Further, one side of the air cushion 1 extends outward to form a connecting belt 12 , one side of the airbag 2 is connected with the connecting belt 12 , the first exhaust channel 13 is arranged on the connecting belt 12 , and the connecting belt 12 is wrapped around the airbag 2 . The sides are connected by ultrasonic welding to achieve the overall aesthetics.

As shown in FIG. 1 and FIG. 4 , both the first one-way air valve 11 and the second one-way air valve 21 include a valve seat 111 and a valve body 112 disposed in the valve seat 111 . The valve seat 111 is provided with a cavity, and the valve The body 112 is arranged in the cavity of the valve seat 111. The valve body 112 is connected with the inner wall of the valve seat 111 by threads. The top end of the valve seat 111 is provided with an air outlet 1111. The air outlet 1111 is communicated with the first cavity 10, the bottom end of the valve body 112 of the first one-way air valve 11 is open and communicated with the second cavity 20; the bottom end of the second one-way air valve 21 is open and communicated with the outside atmosphere, the first The air outlet holes 1111 of the two one-way air valves 21 communicate with the second cavity 20 .

The valve body 112 is hollow, and the valve body 112 is provided with an intermediate plate 114 and a moving block 113 . The intermediate plate 114 is provided with an air passage 1141 . Specifically, the air passage 1141 is a plurality of through holes provided on the intermediate plate 114 , the bottom of the moving block 113 is provided with a valve plate 1131 that covers the air outlet 1111. The moving block 113 passes through the intermediate plate 114 and can move along the inner wall of the valve body 112. A spring 115 is provided between the block 113 and the intermediate plate 114 .

Specifically, when the airbag 2 is squeezed, a pressure difference is formed between the second cavity 20 and the first cavity 10, and the atmospheric pressure in the first cavity 10 is relatively high, the valve plate 1131 of the first one-way air valve 11 After being pushed open, the gas overflows upward along the outer circumference of the moving block 113, and enters the second cavity 20 through the gas passage 1141 on the intermediate plate 114. At the same time, the moving block 113 moves upward along the inner wall of the valve body 112 and moves The spring 115 on the block 113 and the intermediate plate 114 is compressed. When the atmospheric pressures of the first cavity 10 and the second cavity 20 are equal, the valve plate 1131 is no longer stressed, the spring 115 is reset, and the block 113 moves along the valve body 112 The inner wall is reset downward until the valve plate 1131 covers the air outlet hole 1111 again.

Similarly, the working process and working principle of the second one-way valve plate 1131 are the same as those of the first one-way valve plate 1131. The airbag 2 is squeezed several times, and the pumping operation is repeated until the atmospheric pressure of the first cavity 10 is equal to the second one. When the atmospheric pressure of the cavity 20 is close to vacuum or negative pressure, the second one-way air valve 21 is no longer opened, and the air bag 2 no longer discharges gas to the outside.

The moving block 113 includes a moving column 1133 and a supporting body 1132. The bottom end of the supporting body 1132 is provided with a concave cavity. The valve plate 1131 is embedded in the concave cavity and extends toward the bottom surface of the supporting body 1132. The spring 115 is sleeved on the moving column 1133. One end of the spring 115 is abutted on the intermediate plate 114, and the other end is abutted on the support body 1132. When the atmospheric pressure on the valve plate 1131 side is high, the valve plate 1131 is pushed open, pushing the moving block 113 upward, and the spring 115 is compressed. The gas in the first cavity 10 overflows from the air outlet 1111 .

The first exhaust passage 13 is provided with a connecting seat 116, the bottom end of the connecting seat 116 is welded on the air cushion 1 by ultrasonic welding, the bottom end of the valve seat 111 is welded on the airbag 2 by ultrasonic welding, and the valve seat 111 and the connecting seat 116 are threaded through For connection, by setting the valve seat 111 and the connecting seat 116 on the airbag 2 and the air cushion 1 respectively, because the airbag 2 and the air cushion 1 are made of soft materials, the rigid valve seat 111 and the connecting seat 116 are provided to ensure the valve body 112 The stability of the structural connection.

A sealing ring 117 is provided at the threaded connection between the valve seat 111 and the connecting seat 116 , and the sealing ring 117 ensures the airtightness of the threaded connection between the valve seat 111 and the connecting seat 116 .

It should be understood that the terms "first", "second", etc. are used to describe various information in the present invention, but the information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information without departing from the scope of the present invention.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present invention, several improvements and replacements can be made. These improvements And replacement should also be regarded as the protection scope of the present invention.

Claims (9)

1. a kind of negative pressure cushion, which is characterized in that including air cushion and air bag, the air cushion is connect with the air bag, the air cushion In be equipped with the first cavity, the second cavity is equipped in the air bag；First is equipped between first cavity and second cavity Exhaust passage, is equipped with the first Non-return air valve in the first exhaust passage, and the air bag is equipped with second exhaust channel, and described the The second Non-return air valve is equipped in two exhaust passages.

2. negative pressure cushion as described in claim 1, which is characterized in that a side of the air cushion extends outwardly to form connection Band, a side of the air bag and the connection band connection, the first exhaust passage are arranged in the connecting band.

3. negative pressure cushion as claimed in claim 2, which is characterized in that the connecting band and the air bag pass through ultrasonic bonding Mode connect.

4. negative pressure cushion as described in claim 1, which is characterized in that first Non-return air valve and the second Non-return air valve wrap The valve body for including valve seat and being arranged in valve seat, the valve seat top are equipped with venthole, and the bottom end of first Non-return air valve is spacious It opens and is connected to second cavity, the venthole of first Non-return air valve is connected to first cavity, and described second is unidirectional The open bottom end of air valve is connected to ambient atmosphere, and the venthole of second Non-return air valve is connected to second cavity；

The hollow setting of valve body, intermediate plate and movable block are equipped in the valve body, and the intermediate plate was equipped with gas channel, institute The bottom for stating movable block is equipped with the valve block for covering the venthole, and the movable block passes through the intermediate plate and can be along the valve Internal wall is mobile, and the periphery of the movable block and the valve interior wall have gap, sets between the movable block and the intermediate plate There is spring.

5. negative pressure cushion as claimed in claim 4, which is characterized in that the movable block includes mobile column and supporter, described The bottom end of supporter is equipped with cavity, and the valve block is embedded in the cavity and extends towards the bottom surface of the supporter, the bullet Spring is set in the mobile column, and one end of the spring is connected on the intermediate plate, and the other end is connected to the supporter On.

6. negative pressure cushion as claimed in claim 4, which is characterized in that attachment base is equipped in the first exhaust passage, it is described The bottom end of attachment base is connect with the air cushion, and the bottom end of the valve seat is connect with the air bag, the valve seat and the attachment base It is connected through a screw thread.

7. negative pressure cushion as claimed in claim 6, which is characterized in that the threaded connection place of the valve seat and the attachment base is set There is sealing ring.

8. negative pressure cushion as described in claim 1, which is characterized in that the air bag is by fluorubber or flexible plastics It is made.

9. negative pressure cushion as described in claim 1, which is characterized in that the outer layer of the air cushion is made of TPU material.