Negative pressure suction cup

Abstract

The utility model discloses a negative pressure suction cup which comprises a negative pressure suction cup body, the negative pressure suction cup body is of a cavity structure with an opening in the lower end, the peripheral side of the negative pressure suction cup body can be compressed, and a one-way valve is arranged on the negative pressure suction cup body. The one-way valve is additionally arranged on the negative pressure suction cup body of the cardio-pulmonary resuscitation machine accessory and used for exhausting, when gas overflows, the gas in the negative pressure suction cup body does not need to overflow from the position, attached to the skin of the chest, of the edge of the lower end of the negative pressure suction cup body any more, the better sealing effect is achieved, and therefore the lifting force to the chest is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of cardiopulmonary resuscitation machine accessories, specifically a negative pressure suction cup. Background Technology

[0002] The negative pressure suction cup is installed and fixed on the compression head of the cardiopulmonary resuscitation machine, fitting against the skin of the chest cavity. When the compression head moves downward, the air pressure inside the negative pressure suction cup increases, and the gas is expelled to the outside. When the compression head moves upward, the negative pressure suction cup forms a seal against the skin, creating negative pressure inside the cup, which exerts a certain lifting force on the chest cavity and helps prevent chest collapse or rib fractures.

[0003] Most cardiopulmonary resuscitation machines on the market are equipped with a negative pressure suction cup. However, the existing negative pressure suction cup design lacks an exhaust port. The gas inside the negative pressure suction cup can only overflow from all directions at the point where it is in contact with the chest skin. The need to both expel the gas and seal the cup to form negative pressure results in poor airtightness, which in turn leads to poor chest cavity lifting effect. Utility Model Content

[0004] This invention provides a negative pressure suction cup to solve at least one of the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A negative pressure suction cup includes a negative pressure suction cup body, the negative pressure suction cup body is a cavity structure with an open bottom, and the periphery of the negative pressure suction cup body is compressible, and a one-way valve is provided on the negative pressure suction cup body.

[0007] Preferably, the negative pressure suction cup body is provided with a pressing head, and a pressing rod is connected above the pressing head.

[0008] Preferably, the pressing rod and the pressing head are connected by bolts.

[0009] Preferably, a pressure sensor is provided between the pressing rod and the pressing head, the pressure sensor is disposed inside the pressure fixing component, and the pressure fixing component is disposed on the negative pressure suction cup body.

[0010] Preferably, one end of the pressure sensor is connected to the pressing rod, and the other end of the pressure sensor is connected to the pressing head.

[0011] Preferably, the one-way valve is provided in several groups.

[0012] Preferably, the one-way valve includes a valve seat, which is interference-fitted to the negative pressure suction cup body, and an outer sealing ring is provided between the valve seat and the negative pressure suction cup body.

[0013] Preferably, the valve seat has a sealing cavity inside, and the sealing cavity has a structure in which the upper diameter is larger than the lower diameter.

[0014] Preferably, a guide rod is slidably inserted into the valve seat, and a sealing head is fixedly connected to the lower end of the guide rod. A spring is provided between the sealing head and the upper end of the valve seat. The spring is sleeved on the guide rod, and the two ends of the spring abut against the valve seat and the sealing head, respectively. The sealing cavity on the upper side of the sealing head is connected to the external environment through the gap between the valve seat and the guide rod.

[0015] Preferably, the sealing head is provided with an inner sealing ring.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] This application adds a one-way valve to the negative pressure suction cup body of the cardiopulmonary resuscitation machine accessory for venting. When gas overflows, the gas inside the negative pressure suction cup body no longer needs to overflow from the lower edge of the negative pressure suction cup body that is in contact with the chest skin, resulting in a better sealing effect and thus improving the lifting force on the chest cavity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the main structure of this utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the one-way valve structure of this utility model;

[0021] Figure 4 This is a schematic diagram illustrating the negative pressure suction of the gas movement inside the cup body when the pressing rod of this utility model is pressed down;

[0022] Figure 5 This is a schematic diagram illustrating the negative pressure suction of the gas movement inside the cup body when the pressing rod of this utility model is lifted.

[0023] Figure 6 This is a structural diagram showing the four states of the one-way valve of this utility model.

[0024] In the diagram: 1. Pressing rod; 2. Pressing head; 3. Negative pressure suction cup body; 4. One-way valve; 5. Pressure sensor; 6. Pressure fixing component; 7. Valve seat; 8. Outer sealing ring; 9. Inner sealing ring; 10. Guide rod; 11. Spring; 12. Sealing head. Detailed Implementation

[0025] In this utility model, the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the utility model. They are merely used to distinguish protective components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] Example

[0027] Please see Figures 1-6 The present invention provides an embodiment of a negative pressure suction cup, comprising a negative pressure suction cup body 3, wherein the negative pressure suction cup body 3 is a cavity structure with an open lower end, and the periphery of the negative pressure suction cup body 3 is compressible, and a one-way valve 4 is provided on the negative pressure suction cup body 3.

[0028] The negative pressure suction cup body 3 is provided with a pressing head 2, and a pressing rod 1 is connected above the pressing head 2.

[0029] The pressing rod 1 and the pressing head 2 are connected by bolts.

[0030] A pressure sensor 5 is provided between the pressing rod 1 and the pressing head 2. The pressure sensor 5 is located inside the pressure fixing member 6, which is located on the negative pressure suction cup body 3.

[0031] One end of the pressure sensor 5 is connected to the pressing rod 1, and the other end of the pressure sensor 5 is connected to the pressing head 2.

[0032] The one-way valve 4 is provided in several groups.

[0033] The one-way valve 4 includes a valve seat 7, which is interference-fitted to the negative pressure suction cup body 3, and an outer sealing ring 8 is provided between the valve seat 7 and the negative pressure suction cup body 3.

[0034] The valve seat 7 has a sealing cavity inside, and the sealing cavity has a structure in which the upper diameter is larger than the lower diameter.

[0035] A guide rod 10 is slidably inserted into the valve seat 7. A sealing head 12 is fixedly connected to the lower end of the guide rod 10. A spring 11 is provided between the sealing head 12 and the upper end of the valve seat 7. The spring 11 is sleeved on the guide rod 10. The two ends of the spring 11 abut against the valve seat 7 and the sealing head 12 respectively. The sealing cavity on the upper side of the sealing head 12 is connected to the external environment through the gap between the valve seat 7 and the guide rod 10.

[0036] An inner sealing ring 9 is provided on the sealing head 12.

[0037] The working principle and beneficial effects of the above scheme are as follows:

[0038] The lower edge of the negative pressure suction cup body 3 fits against the chest cavity. When the pressing rod 1 moves downward, the negative pressure suction cup body 3 squeezes the gas inside downward, increasing the internal air pressure. The gas pressure overcomes the elastic force of the spring 11 and pushes the guide rod 10 upward, separating the sealing head 12 from the inner wall of the valve seat 7. Air overflows. After the air overflow stops, the sealing head 12 forms a seal with the inner wall of the valve seat 7 under the elastic force of the spring 11.

[0039] Then, when the pressing rod 1 moves upward, it drives the negative pressure suction cup body 3 to move upward. Since the lower edge of the negative pressure suction cup body 3 is in contact with the chest cavity, negative pressure is formed inside, thereby driving the chest cavity to rise.

[0040] The one-way valve 4 added to the negative pressure suction cup body 3 of the cardiopulmonary resuscitation machine accessory is used for venting. When gas overflows, the gas inside the negative pressure suction cup body 3 no longer needs to overflow from the lower edge of the negative pressure suction cup body 3 where it is in contact with the chest skin, resulting in a better sealing effect and thus improving the lifting force on the chest cavity.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A negative pressure suction cup, characterized in that, It includes a negative pressure suction cup body (3), which is a cavity structure with an open bottom and the periphery of the negative pressure suction cup body (3) can be compressed. A one-way valve (4) is provided on the negative pressure suction cup body (3).

2. The negative pressure suction cup according to claim 1, characterized in that, The negative pressure suction cup body (3) is provided with a pressing head (2), and a pressing rod (1) is connected above the pressing head (2).

3. A negative pressure suction cup according to claim 2, characterized in that, The pressing rod (1) and the pressing head (2) are connected by bolts.

4. A negative pressure suction cup according to claim 2, characterized in that, A pressure sensor (5) is provided between the pressing rod (1) and the pressing head (2). The pressure sensor (5) is located inside the pressure fixing member (6), which is located on the negative pressure suction cup body (3).

5. A negative pressure suction cup according to claim 4, characterized in that, One end of the pressure sensor (5) is connected to the pressing rod (1), and the other end of the pressure sensor (5) is connected to the pressing head (2).

6. A negative pressure suction cup according to claim 1, characterized in that, The one-way valve (4) is provided in several groups.

7. A negative pressure suction cup according to claim 1, characterized in that, The one-way valve (4) includes a valve seat (7), which is interference-fitted to the negative pressure suction cup body (3), and an outer sealing ring (8) is provided between the valve seat (7) and the negative pressure suction cup body (3).

8. A negative pressure suction cup according to claim 7, characterized in that, The valve seat (7) has a sealing cavity inside, and the sealing cavity has a structure in which the upper diameter is larger than the lower diameter.

9. A negative pressure suction cup according to claim 8, characterized in that, A guide rod (10) is slidably inserted into the valve seat (7). A sealing head (12) is fixedly connected to the lower end of the guide rod (10). A spring (11) is provided between the sealing head (12) and the upper end of the valve seat (7). The spring (11) is sleeved on the guide rod (10). The two ends of the spring (11) abut against the valve seat (7) and the sealing head (12) respectively. The sealing cavity on the upper side of the sealing head (12) is connected to the external environment through the gap between the valve seat (7) and the guide rod (10).

10. A negative pressure suction cup according to claim 9, characterized in that, An inner sealing ring (9) is provided on the sealing head (12).

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