Air bag supporting structure for compressed oxygen self-rescuer and air bag

Abstract

The air bag supporting structure comprises a top plate and a bottom plate, and the top plate and the bottom plate are connected with a breather valve set and an air inlet connector which are used for being communicated with a mouth tool and an oxygen bottle respectively; a folding supporting structure is arranged between the top plate and the bottom plate, and the folding supporting structure can be in a folded state when the top plate and the bottom plate are close to each other and can be in an unfolded state when the top plate and the bottom plate are away from each other. According to the technical scheme, after the air bag is unfolded, the interior of the air bag is supported by the top plate and the bottom plate, so that the shape of the air bag has certain stability, negative pressure can be formed in the air bag in an initial state, the working mode of the self-rescuer can be directly adjusted to an automatic air supply and oxygen supply mode, subsequent operation steps of the self-rescuer can be reduced, and the self-rescuer efficiency is improved. And the operation difficulty of personnel in a dangerous situation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lifesaving devices, and in particular to an airbag supporting structure and an airbag for a compressed oxygen self-rescuer. Background Art

[0002] Compressed oxygen self-rescuer, also known as isolated compressed oxygen self-rescuer, is a reusable self-rescue escape equipment that uses high-pressure compressed oxygen as the oxygen source. It is mainly used in coal mines or working environments with normal atmospheric pressure when toxic and harmful gas outbursts and oxygen-deficiency asphyxiation disasters occur.

[0003] Its structural principle is: when inhaling, oxygen enters the human body through the air bag, breathing valve, and mouthpiece. When exhaling, the gas passes through the breathing valve and the exhalation hose and enters the purification tank. The CO2 exhaled by the human body is absorbed by the absorbent in the purification tank, and the remaining oxygen enters the air bag and mixes with the oxygen output by the pressure reducer. This cycle is repeated to complete the human breathing cycle.

[0004] When working normally, it has the following three modes:

[0005] Quantitative oxygen supply: Turn the switch hand wheel counterclockwise, and the high-pressure oxygen will flow from the oxygen cylinder to the pressure reducer. After decompression, 1.2L / min of oxygen will be automatically output into the airbag.

[0006] Manual air supply: Press the air supply pressure plate with your finger, and oxygen will enter the airbag at 60L / min. When your finger leaves the air supply pressure plate, the oxygen supply will stop.

[0007] Automatic air supply: When the respiratory system is under negative pressure, the air supply pressure plate contracts inward, compressing the air supply rod to open the oxygen supply mechanism. Oxygen enters the air bag at 60L / min. When the air bag inflates rapidly, the air supply pressure plate leaves the air supply rod and air supply stops.

[0008] When people are in danger, they need to deal with external dangers while operating the self-rescuer, and they are often unable to replenish oxygen in time. The two modes of quantitative oxygen supply and manual air supply are difficult to achieve in practice;

[0009] In comparison, the automatic air supply mode is the best choice. The automatic air supply mode requires the use of pressure changes in the system. However, there is no supporting structure in the existing airbag. When the internal oxygen is consumed, the airbag shrinks and cannot maintain a certain shape. The pressure changes, especially negative pressure, are not obvious. There is a great risk in simply using the automatic air supply mode. Summary of the invention

[0010] In view of this, the purpose of the present invention is to provide an airbag support structure and an airbag for a compressed oxygen self-rescuer to solve the problem in the prior art that the existing airbag has no support structure, the airbag shrinks when the internal oxygen is consumed, and cannot maintain a certain shape. The pressure change, especially the negative pressure, is not obvious, and there is a great risk in simply using the automatic air replenishment and oxygen supply mode.

[0011] The present invention is achieved through the following technical solutions:

[0012] An airbag support structure for a compressed oxygen self-rescuer comprises a top plate and a bottom plate, wherein a breathing valve group and an air inlet joint for communicating with a mouthpiece and an oxygen cylinder are respectively connected to the top plate and the bottom plate;

[0013] A folding support structure is provided between the top plate and the bottom plate. The folding support structure can be in a folded state when the top plate and the bottom plate are in a close state, and can be in an extended state when the top plate and the bottom plate are in a far state.

[0014] It is further defined that both the top plate and the bottom plate are polygonal structures, and a folding component is provided between each edge of the top plate and the bottom plate, and the folding support structure is composed of a plurality of folding components.

[0015] It is further defined that the folding assembly includes two folding parts, one end of the two folding parts is respectively hinged to the two ends of the same side of the top plate, and the other end is respectively hinged to the two ends of the same side of the bottom plate;

[0016] The two folding parts each include a plurality of support rod groups hingedly connected in sequence, each support rod group includes two support rods, one end of the two support rods are hinged to each other and extend toward the middle of the edge line of the top plate and the bottom plate, and the other end is separated to the upper and lower sides and is located between the lines connecting the edge corners of the top plate and the bottom plate.

[0017] It is further defined that a first hinge seat is provided between the inner ends of two adjacent support rods in two adjacent support rod groups, a pin shaft penetrating the ends of the two support rods is connected to the first hinge seat, a sliding hole is provided on the first hinge seat, and an extending direction of the sliding hole is parallel to the edge lines of the top plate and the bottom plate;

[0018] A sliding rod passes through the sliding hole, and a plurality of the sliding rods are sequentially connected to form an annular structure.

[0019] It is further defined that second hinge seats are provided at the corners of the bottom surface of the top plate and the corners of the top surface of the bottom plate, and the second hinge seats are provided with first openings facing two adjacent edge lines respectively, and the end of the support rod is hinged in the first opening through a pin shaft.

[0020] It is further defined that the hinged ends of the two support rods in the same support rod group are provided with a third hinged seat, and the third hinged seat is provided with second openings facing two adjacent side lines respectively, and the hinged ends of the two support rods in the same support rod group are hinged in the second opening through pin shaft cooperation.

[0021] It is further defined that the breathing valve includes a support tube and a transfer tube, one end of the support tube is connected to the top surface of the top plate, and the other end is connected to one end of the transfer tube;

[0022] The top plate is provided with a plurality of air guide holes, and the plurality of air guide holes are all located in the support tube and are arranged in a ring shape along the inner wall of the support tube;

[0023] An annular support plate is arranged on the outer wall of one end of the transfer tube close to the support tube, and a sleeve is connected to the annular support plate and sleeved outside the end of the support tube;

[0024] An air-closing ring is movably fitted in the support tube, and the air-closing ring covers a plurality of air guide holes. A support spring is provided between the air-closing ring and the annular support plate, and the two ends of the support spring are respectively against the air-closing ring and the annular support plate, and the air-closing ring is sealed and fitted with the top surface of the top plate under the action of the support spring;

[0025] The side wall of the support tube is connected with an exhalation tube, and the exhalation tube is communicated with the inside of the support tube.

[0026] It is further defined that the transfer tube extends into the support tube at one end of the support tube, and the upper end of the support spring is sleeved outside the support tube.

[0027] It is further defined that the inner edge of the air-closing ring is provided with a plurality of support plates extending inwardly, and a guide ring is provided inside the air-closing ring;

[0028] The outward ends of the plurality of support plates are connected to the air-sealing ring, and the inward ends are connected to the guide ring;

[0029] The top plate is connected with a guide rod penetrating the guide ring and extending upward;

[0030] An annular groove is formed on the bottom surface of the air-closing ring, a flexible sealing sheet is arranged in the annular groove, and the bottom surface of the flexible sealing sheet protrudes out of the annular groove.

[0031] An airbag, comprising a bladder body, wherein the bladder body is in a straight cylindrical shape, an upper end of the bladder body is wrapped outside the edge of a top plate, and a lower end of the bladder body is wrapped outside the edge of a bottom plate;

[0032] The top edge of the top plate is provided with a first retaining ring extending upward, the inner edge of the top edge of the first retaining ring is provided with a first annular convex ridge protruding inward, the first retaining ring is sleeved with a first clamping ring, and the outer edge of the bottom surface of the first clamping ring is provided with a second annular convex ridge protruding outward;

[0033] The inner diameter of the first annular convex ridge is smaller than the outer diameter of the second annular convex ridge;

[0034] The bottom edge of the bottom plate is provided with a second retaining ring extending downward, the inner edge of the bottom edge of the second retaining ring is provided with a third annular convex ridge protruding inward, a second clamping ring is provided inside the second retaining ring, and the outer edge of the top surface of the second clamping ring is provided with a fourth annular convex ridge protruding outward;

[0035] The inner diameter of the third annular convex ridge is smaller than the outer diameter of the fourth annular convex ridge.

[0036] The beneficial effects of the present invention are:

[0037] The invention discloses an airbag support structure and an airbag for a compressed oxygen self-rescuer. After the airbag is deployed, the interior of the airbag is supported by a top plate and a bottom plate, so that the shape of the airbag can have a certain stability. Negative pressure can be formed in the airbag in the initial state, and the working mode of the self-rescuer can be directly adjusted to the automatic air replenishment and oxygen supply mode, which can reduce the subsequent operation steps of the self-rescuer and reduce the operation difficulty for people in danger. At the same time, negative pressure can be formed at the first time when the airbag is deployed to trigger the automatic air replenishment and oxygen supply mode, so that it can be put into normal use more quickly, and the damage caused to people in distress by harmful substances in dangerous environments can be further reduced.

[0038] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a front view of the airbag support structure for the compressed oxygen self-rescuer;

[0040] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0041] Figure 3 for Figure 1 Enlarged view of middle B;

[0042] Figure 4 for Figure 1 Enlarged view of middle C;

[0043] Figure 5 for Figure 1 Enlarged view of middle D;

[0044] Figure 6 A three-dimensional diagram of the airbag support structure for a compressed oxygen self-rescuer;

[0045] Figure 7 for Figure 6 Enlarged view of E in the middle;

[0046] Figure 8 for Figure 6 Enlarged view of middle F;

[0047] Fig. 9 This is a schematic diagram of the installation structure of the closed air ring;

[0048] Fig.10 is a schematic diagram of the installation structure of the first hinged seat;

[0049] Fig.11 Schematic diagram of the installation structure of the shrapnel;

[0050] In the figure: 1. top plate; 2. bottom plate; 3. air inlet joint; 4. support rod; 5. first hinge seat; 6. pin shaft; 7. sliding hole; 8. sliding rod; 9. second hinge seat; 10. third hinge seat; 11. support tube; 12. adapter tube; 13. air guide hole; 14. annular support plate; 15. sleeve; 16. air-closing ring; 17. support spring; 18. exhalation tube; 19. support plate; 20. guide ring; 21. guide rod; 22. flexible sealing sheet; 23. first retaining ring; 24. first annular convex ridge; 25. first retaining ring; 26. second annular convex ridge; 27. second retaining ring; 28. second retaining ring; 29. ​​third annular convex ridge; 30. fourth annular convex ridge; 31. strip hole; 32. spring piece. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0054] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0055] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0056] See also Figure 1-11 The present invention provides a technical solution: an airbag support structure for a compressed oxygen self-rescuer, comprising a top plate 1 and a bottom plate 2, to which a breathing valve group and an air intake connector 3 for communicating with a mouthpiece and an oxygen cylinder are respectively connected; a folding support structure is arranged between the top plate 1 and the bottom plate 2, and the folding support structure can be in a folded state when the top plate 1 and the bottom plate 2 are in a close state, and in an extended state when the top plate 1 and the bottom plate 2 are in a distant state.

[0057] The top plate 1 and the bottom plate 2 can be used to fix and support the two ends of the airbag, respectively. The folding support structure is used to support and connect the top plate 1 and the bottom plate 2, so that the bottom plate 2 and the bottom plate 2 can be in a close state, that is, the airbag is in a contracted state, or the top plate 1 and the bottom plate 2 are in a far state, that is, the airbag is in an extended state. When the airbag is in the extended state, since the two ends are supported by the top plate 1 and the bottom plate 2, the airbag has a certain shape, that is, the internal space is expanded. By increasing the internal volume through the expansion of the internal space, the inside of the airbag can be in a negative pressure state, and the shape of the airbag is restricted by the top plate 1 and the bottom plate 2, which is conducive to maintaining the internal shape, that is, when the inside of the airbag is in a negative pressure state, the negative pressure state can be maintained;

[0058] During installation, the top plate 1 and the bottom plate 2 are squeezed together, and then connected to the outlet of the oxygen cylinder through the air inlet connector 3, and finally placed in the storage box. The air inlet connector 3 and the outlet of the oxygen cylinder can be connected by threaded fitting or by using a connection structure such as a pipe quick connector, which can be easily assembled and connected;

[0059] The specific steps are as follows:

[0060] The first step is to open the valve of the oxygen cylinder;

[0061] The second step is to adjust the working mode of the self-rescuer to the automatic air supply mode;

[0062] The third step is to pull the top plate 1 to deploy the airbag;

[0063] Specifically, since the bottom plate 2 is connected to the oxygen cylinder outlet through the air inlet connector 3 and is in a fixed state, the bottom plate 2 and the bottom plate 2 can be gradually separated by pulling the top plate 1. During the separation process, the folding support structure gradually extends to support the top plate 1 and the bottom plate 2, so that the top plate 1 and the bottom plate 2 constitute a support structure supported in the airbag, so that the internal space of the airbag is gradually enlarged, and negative pressure appears inside the airbag;

[0064] In this technical solution, after the airbag is deployed, the top plate 1 and the bottom plate 2 are supported inside, so that the shape of the airbag can have a certain stability, and negative pressure can be formed in the airbag in the initial state, so that the working mode of the self-rescuer can be directly adjusted to the automatic air replenishment and oxygen supply mode, which can reduce the subsequent operation steps of the self-rescuer and reduce the operation difficulty of people in danger;

[0065] At the same time, it can generate negative pressure to trigger the automatic air replenishment and oxygen supply mode as soon as the airbag is deployed, so that it can be put into normal use more quickly, further reducing the damage caused to people in distress by harmful substances in dangerous environments.

[0066] In this embodiment, the top plate 1 and the bottom plate 2 are both polygonal structures, and a folding component is provided between each edge of the top plate 1 and the bottom plate 2, and the folding support structure is composed of a plurality of folding components.

[0067] The folding support structure is composed of multiple folding support components, and the multiple folding support components are located between the opposite sides of the top plate 1 and the bottom plate 2. The multiple folding support components respectively constitute a support structure between the opposite sides of the top plate 1 and the bottom plate 2. The folding support structure composed of the multiple folding support components will form a cage-like structure to support the sides of the airbag after extension, reduce the degree of inward collapse of the sides of the airbag, and make the external structural shape of the airbag more stable, which is beneficial to the internal expansion of the airbag to form negative pressure after the airbag is deployed.

[0068] In this embodiment, the folding assembly includes two folding parts, one end of the two folding parts is hinged to the two ends of the same side of the top plate 1, and the other end is hinged to the two ends of the same side of the bottom plate 2;

[0069] The two folding parts each include a plurality of support rod groups 4 hingedly connected in sequence, each of the support rod groups 4 includes two support rods 4, one end of the two support rods 4 are hinged to each other and extend to the middle of the edge line of the top plate 1 and the bottom plate 2, and the other end is separated to the upper and lower sides and is located between the connecting line of the edge corners of the top plate 1 and the bottom plate 2.

[0070] That is, the two separated ends of the two support rods 4 use the line connecting the corners of the top plate 1 and the bottom plate 2 as the reference line. When the end points of the two support rods 4 slide with the reference line as the roadbed, the other end is in a hinged state, so the two support rods 4 can be unfolded and folded, and the unfolding and folding process is carried out within the range of the top edge and the bottom plate 2 edge line, which can reduce the damage to the airbag caused by movement friction.

[0071] In this embodiment, a first hinge seat 5 is provided between the inner ends of two adjacent support rods 4 in two adjacent groups of support rods 4, and a pin shaft 6 penetrating the ends of the two support rods 4 is connected to the first hinge seat 5. A sliding hole 7 is provided on the first hinge seat 5, and the extending direction of the sliding hole 7 is parallel to the edge lines of the top plate 1 and the bottom plate 2;

[0072] A sliding rod 8 passes through the sliding hole 7, and a plurality of the sliding rods 8 are sequentially connected to form an annular structure.

[0073] The connecting pin 6 on the first hinge seat 5 is hinged to the ends of the two support rods 4, and slides with the slide rod 8 through the slide hole 7, so that the first hinge seat 5 can move along the slide rod 8;

[0074] Moreover, the annular structure formed by connecting the plurality of slide bars 8 in sequence can form a mutual limit with the plurality of support bars 4 located at the same height layer, so that the slide bars 8 are in a relatively static state when the first hinge seat 5 slides, which is beneficial to the expansion or contraction of the overall structure;

[0075] At the same time, both side walls of the slide bar 8 can be provided with strip grooves extending in the length direction, and a spring piece 32 is arranged in the strip groove. The spring piece 32 is connected to the bottom of the strip groove at one end of the middle of the slide bar 8, and the other end is a movable end protruding from the strip groove away from the middle end of the slide bar 8. The spring piece 32 can be made of a steel sheet, which has its own elasticity, and its movable end can be pressed into the strip groove, and can also be reset by its own elasticity after the pressure is removed;

[0076] During use, when the first hinge seat 5 slides toward the two ends of the slide rod 8 to the position of the spring sheet 32, the spring sheet 32 ​​can be pressed into the strip groove, and when sliding over the spring sheet 32, the spring sheet 32 ​​protrudes out of the strip groove through its own elastic reset, thereby supporting the first hinge seat 5 and forming a locking limit structure to prevent the first hinge seat 5 from sliding toward the middle of the slide rod 8, which is beneficial to maintaining the support state of the inside of the airbag.

[0077] In this embodiment, second hinge seats 9 are provided at the corners of the bottom surface of the top plate 1 and the corners of the top surface of the bottom plate 2. The second hinge seats 9 are provided with first openings facing two adjacent edge lines respectively. The end of the support rod 4 is hinged in the first opening through a pin shaft 6.

[0078] The second hinge seat 9 is used as a hinged installation position with the support rod 4 through the first opening, that is, the first opening can be used as a rotation space for the support rod 4, so that the support rod 4 can be close to the top plate 1 or the bottom plate 2 when rotating, reducing the volume in the contracted state.

[0079] In this embodiment, the hinged ends of the two support rods 4 in the same group of support rods 4 are provided with a third hinged seat 10, and the third hinged seat 10 is provided with second openings facing two adjacent side lines respectively. The hinged ends of the two support rods 4 in the same group of support rods 4 are hinged in the second opening through the pin shaft 6.

[0080] The two support rods 4 are hinged together in the second opening, and can deflect or overlap in the second opening when rotating, that is, the two support rods 4 in the same second opening can be completely overlapped and folded, reducing the occupied volume after folding.

[0081] In this embodiment, the breathing valve includes a support tube 11 and a transfer tube 12, one end of the support tube 11 is connected to the top surface of the top plate 1, and the other end is connected to one end of the transfer tube 12;

[0082] The top plate 1 is provided with a plurality of air guide holes 13, which are all located in the support tube 11 and are arranged in a ring shape along the inner wall of the support tube 11;

[0083] An annular support plate 14 is disposed on the outer wall of one end of the transfer tube 12 close to the support tube 11, and a sleeve 15 sleeved outside the end of the support tube 11 is connected to the annular support plate 14;

[0084] An air-closing ring 16 is movably fitted in the support tube 11, and the air-closing ring 16 covers a plurality of air guide holes 13. A support spring 17 is provided between the air-closing ring 16 and the annular support plate 14, and the two ends of the support spring 17 are respectively against the air-closing ring 16 and the annular support plate 14, and the air-closing ring 16 is sealed with the top surface of the top plate 1 under the action of the support spring 17;

[0085] An exhalation pipe 18 is connected to the side wall of the support pipe 11 , and the exhalation pipe 18 is communicated with the interior of the support pipe 11 .

[0086] The support tube 11 is fixed on the top plate 1, and serves as the installation and connection basis of the transfer tube 12. The air guide hole 13 is opened in the support tube 11, that is, it serves as a passage between the inside of the airbag and the outside or the mouthpiece. The air-closing ring 16 covers the air guide hole 13, and the air-closing ring 16 closes the air guide hole 13 through the support spring 17. The exhalation tube 18 is connected with the inside of the support tube 11, and a one-way valve can be arranged therein. The opening direction of the one-way valve is to open outward, that is, the air can be discharged outward through the exhalation tube 18.

[0087] When in use, when inhaling through the mouthpiece, the one-way valve in the exhalation tube 18 will be in a closed state, and negative pressure will be formed in the support tube 11 under the action of inhalation. Under the action of negative pressure, the air-closing ring 16 will overcome the elastic force of the support spring 17 and move upward, and the oxygen in the air bag will enter the mouthpiece through the air guide hole 13, the support tube 11 and the transfer tube 12;

[0088] When exhaling through the mouthpiece, the exhaled air will enter the support tube 11 through the adapter tube 12 and be discharged outward through the exhalation tube 18.

[0089] In this embodiment, one end of the transfer tube 12 close to the support tube 11 extends into the support tube 11 , and the upper end of the support spring 17 is sleeved outside the support tube 11 .

[0090] The end of the transfer tube 12 extends into the support tube 11 as a sleeve connection portion for the end of the support spring 17 , which can keep the support spring 17 in a fixed position and provide stable support for the air-closing ring 16 .

[0091] In this embodiment, a plurality of support plates 19 extending inwardly are provided on the inner edge of the air-closing ring 16, and a guide ring 20 is provided inside the air-closing ring 16;

[0092] The outward ends of the plurality of support plates 19 are connected to the air-sealing ring 16, and the inward ends are connected to the guide ring 20;

[0093] The top plate 1 is connected with a guide rod 20 penetrating through the guide ring 20 and extending upward;

[0094] An annular groove is formed on the bottom surface of the air-closing ring 16 , and a flexible sealing sheet 22 is arranged in the annular groove. The bottom surface of the flexible sealing sheet 22 protrudes out of the annular groove.

[0095] The air-closing ring 16 is connected to the guide ring 20 through the support plate 19, and is sleeved on the guide rod 20 through the guide ring 20. The guide rod 20 is fixed on the top plate 1 as a sliding limit structure for the guide ring 20 and the air-closing ring 16, which plays a limit role in the sliding of the air-closing ring 16 and improves the structural stability of the air-closing ring 16.

[0096] An annular groove is provided on the bottom surface of the air-closing ring 16, and the annular groove is opposite to the air-guiding hole 13, that is, the flexible sealing sheet 22 located in the annular groove is opposite to the air-guiding hole 13. The flexible sealing sheet 22 is flexible and can protrude into the air-guiding hole 13 by deformation when squeezed by the supporting spring 17, thereby improving the sealing effect between the air-guiding hole 13 and the air-guiding hole 13.

[0097] An airbag, comprising a bladder body, wherein the bladder body is in a straight cylindrical shape, an upper end of the bladder body is wrapped outside the edge of a top plate 1, and a lower end of the bladder body is wrapped outside the edge of a bottom plate 2;

[0098] The top edge of the top plate 1 is provided with a first retaining ring 23 extending upward, the inner edge of the top edge of the first retaining ring 23 is provided with a first annular convex ridge 24 protruding inwardly, the first retaining ring 23 is sleeved with a first clamping ring 25, and the outer edge of the bottom surface of the first clamping ring 25 is provided with a second annular convex ridge 26 protruding outwardly;

[0099] The inner diameter of the first annular convex rib 24 is smaller than the outer diameter of the second annular convex rib 26;

[0100] The bottom edge of the bottom plate 2 is provided with a second retaining ring 27 extending downward, the inner edge of the bottom edge of the second retaining ring 27 is provided with a third annular convex ridge 29 protruding inward, a second retaining ring 28 is provided inside the second retaining ring 27, and the outer edge of the top surface of the second retaining ring 28 is provided with a fourth annular convex ridge 30 protruding outward;

[0101] The inner diameter of the third annular convex ridge 29 is smaller than the outer diameter of the fourth annular convex ridge 30 .

[0102] The two ends of the capsule are respectively fixed to the top plate 1 and the bottom plate 2, and the edges of the top plate 1 and the bottom plate 2 are respectively provided with a first retaining ring 23 and a second retaining ring 27. When connected, the upper and lower ends of the capsule can first bypass the first retaining ring 23 and the second retaining ring 27, and then be compressed by the first clamping ring 25 and the second clamping ring 28, so that the upper and lower ends of the capsule are respectively connected to the top plate 1 and the bottom plate 2, and the capsule can be conveniently replaced by means of a snap connection;

[0103] At the same time, a first annular convex rib 24 is provided on the first retaining ring 23, and a second annular convex rib 26 is provided on the first clamping ring 25, and the inner diameter of the first annular convex rib 24 is smaller than the outer diameter of the second annular convex rib 26. During the matching extrusion process, when the second annular convex rib 26 is pressed under the first annular convex rib 24, a limiting structure will be formed to improve the strength of the connection structure between the first clamping ring 25 and the first retaining ring 23 and the clamping connection effect on the upper end of the capsule;

[0104] Similarly, the cooperation between the second clamping ring 28 and the second retaining ring 27 through the fourth annular rib 30 and the third annular rib 29 can also improve the strength of the connection structure between the two and improve the clamping connection effect on the upper end of the capsule.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An airbag support structure for a compressed oxygen self-rescuer, characterized in that: It comprises a top plate and a bottom plate, and the top plate and the bottom plate are respectively connected with a breathing valve group and an air inlet connector for communicating with a mouthpiece and an oxygen cylinder; A folding support structure is provided between the top plate and the bottom plate. The folding support structure can be in a folded state when the top plate and the bottom plate are in a close state, and can be in an extended state when the top plate and the bottom plate are in a far state.

2. The airbag support structure for a compressed oxygen self-rescuer according to claim 1, characterized in that: The top plate and the bottom plate are both polygonal structures, and a folding component is arranged between each edge of the top plate and the bottom plate, and the folding support structure is composed of a plurality of folding components.

3. The airbag support structure for a compressed oxygen self-rescuer according to claim 2, characterized in that: The folding assembly comprises two folding parts, one end of the two folding parts is hinged to two ends of the same side of the top plate, and the other end is hinged to two ends of the same side of the bottom plate; The two folding parts each include a plurality of support rod groups hingedly connected in sequence, each support rod group includes two support rods, one end of the two support rods are hinged to each other and extend toward the middle of the edge line of the top plate and the bottom plate, and the other end is separated to the upper and lower sides and is located between the lines connecting the edge corners of the top plate and the bottom plate.

4. The airbag support structure for a compressed oxygen self-rescuer according to claim 3, characterized in that: A first hinge seat is provided between the inner ends of two adjacent support rods in two adjacent support rod groups, a pin shaft penetrating the ends of the two support rods is connected to the first hinge seat, a sliding hole is provided on the first hinge seat, and the extending direction of the sliding hole is parallel to the edge lines of the top plate and the bottom plate; A sliding rod passes through the sliding hole, and a plurality of the sliding rods are sequentially connected to form an annular structure.

5. The airbag support structure for a compressed oxygen self-rescuer according to claim 3, characterized in that: Second hinge seats are provided at the corners of the bottom surface of the top plate and the corners of the top surface of the bottom plate. The second hinge seats are provided with first openings facing two adjacent edge lines respectively. The end of the support rod is hinged in the first opening through a pin shaft.

6. The airbag support structure for a compressed oxygen self-rescuer according to claim 4, characterized in that: The hinged ends of the two support rods in the same support rod group are provided with a third hinged seat, and the third hinged seat is provided with second openings facing two adjacent side lines respectively. The hinged ends of the two support rods in the same support rod group are hinged in the second opening through pin shaft cooperation.

7. The airbag support structure for a compressed oxygen self-rescuer according to any one of claims 1 to 6, characterized in that: The breathing valve includes a support tube and a transfer tube, one end of the support tube is connected to the top surface of the top plate, and the other end is connected to one end of the transfer tube; The top plate is provided with a plurality of air guide holes, and the plurality of air guide holes are all located in the support tube and are arranged in a ring shape along the inner wall of the support tube; An annular support plate is arranged on the outer wall of one end of the transfer tube close to the support tube, and a sleeve is connected to the annular support plate and sleeved outside the end of the support tube; An air-closing ring is movably fitted in the support tube, and the air-closing ring covers a plurality of air guide holes. A support spring is provided between the air-closing ring and the annular support plate, and the two ends of the support spring are respectively against the air-closing ring and the annular support plate, and the air-closing ring is sealed and fitted with the top surface of the top plate under the action of the support spring; The side wall of the support tube is connected with an exhalation tube, and the exhalation tube is communicated with the inside of the support tube.

8. The airbag support structure for a compressed oxygen self-rescuer according to claim 7, characterized in that: The transfer tube extends into the support tube at one end of the support tube, and the upper end of the support spring is sleeved outside the support tube.

9. The airbag support structure for a compressed oxygen self-rescuer according to claim 7, characterized in that: The inner edge of the air-closing ring is provided with a plurality of support plates extending inwards, and a guide ring is provided inside the air-closing ring; The outward ends of the plurality of support plates are connected to the air-sealing ring, and the inward ends are connected to the guide ring; The top plate is connected with a guide rod penetrating the guide ring and extending upward; An annular groove is formed on the bottom surface of the air-closing ring, a flexible sealing sheet is arranged in the annular groove, and the bottom surface of the flexible sealing sheet protrudes out of the annular groove.

10. An airbag comprising the airbag support structure for a compressed oxygen self-rescuer according to any one of claims 1 to 9, characterized in that: It includes a capsule body, which is in a straight cylindrical shape, wherein the upper end of the capsule body is wrapped outside the edge of the top plate, and the lower end of the capsule body is wrapped outside the edge of the bottom plate; The top edge of the top plate is provided with a first retaining ring extending upward, the inner edge of the top edge of the first retaining ring is provided with a first annular convex ridge protruding inward, the first retaining ring is sleeved with a first clamping ring, and the outer edge of the bottom surface of the first clamping ring is provided with a second annular convex ridge protruding outward; The inner diameter of the first annular convex ridge is smaller than the outer diameter of the second annular convex ridge; The bottom edge of the bottom plate is provided with a second retaining ring extending downward, the inner edge of the bottom edge of the second retaining ring is provided with a third annular convex ridge protruding inward, a second clamping ring is provided inside the second retaining ring, and the outer edge of the top surface of the second clamping ring is provided with a fourth annular convex ridge protruding outward; The inner diameter of the third annular convex ridge is smaller than the outer diameter of the fourth annular convex ridge.

Images