Quick connector for connecting oxygen bottle and breathing mask

Abstract

The utility model relates to a quick connector used for connecting an oxygen bottle and a breathing mask, the quick connector comprises a valve port and a connector, the connector is connected to the valve port, the valve port is connected with a limiting assembly, and the limiting assembly comprises a limiting sleeve; a limiting piece; the limiting elastic piece is arranged on the valve port in a sleeving mode and pushes the limiting sleeve to move towards the connector. A positioning groove for limiting the position of the limiting piece is formed in the end face, close to the connector, of the limiting sleeve, the end, away from the axis of the valve port, of the limiting piece is located in the positioning groove, the thickness of the valve port is smaller than the radial length of the limiting piece, a limiting groove is formed in the outer wall of the connector, and the end, close to the axis of the valve port, of the limiting piece can be inserted into the limiting groove. The end, away from the axis of the valve port, of the limiting piece abuts against the inner wall of the limiting sleeve. After the connector is connected with the valve port, the limiting piece is inserted into the limiting groove, so that the positions of the connector and the valve port are limited, and rapid connection of the connector and the valve port is achieved.

Description

Technical Field

[0001] This application relates to the technical field of connectors, and particularly to a quick connector for connecting an oxygen cylinder to a breathing mask. Background Art

[0002] During the process of fire rescue, an oxygen cylinder is needed to supply oxygen so that movement can be carried out within the fire field. The amount of oxygen that an oxygen cylinder can carry is fixed. After the oxygen in the oxygen cylinder is used up, the oxygen cylinder needs to be replaced to continue use. Before replacing the oxygen cylinder, the interface of the breathing mask needs to be separated from the oxygen cylinder first, and after the replacement is completed, the interface is reconnected to the oxygen cylinder.

[0003] Currently, the interface of the breathing mask usually adopts a threaded form, and it usually needs to be rotated several times to achieve the connection or separation of the interface and the oxygen cylinder during the connection process, resulting in a relatively troublesome connection between the oxygen cylinder and the interface of the breathing mask.

[0004] Therefore, a new technical solution is needed to solve the above problems. Utility Model Content

[0005] In order to make the connection between the oxygen cylinder and the breathing mask more convenient and fast, this application provides a quick connector for connecting an oxygen cylinder to a breathing mask.

[0006] A quick connector for connecting an oxygen cylinder to a breathing mask provided by this application adopts the following technical solution:

[0007] A quick connector for connecting an oxygen cylinder to a breathing mask includes a valve port for connecting to an oxygen cylinder and an interface for connecting to a breathing mask. The interface is connected to the valve port, and a limiting component for limiting the position of the interface is connected to the valve port. The limiting component includes:

[0008] A limiting sleeve, which is sleeved outside the valve port and slides along the valve port;

[0009] A limiting member, which penetrates through the valve port and moves along the radial direction of the valve port;

[0010] And a limiting elastic member, which is sleeved on the valve port and pushes the limiting sleeve towards the interface;

[0011] A positioning groove for limiting the position of the limiting member is formed on the end face of the limiting sleeve close to the interface. One end of the limiting member away from the axis of the valve port is located in the positioning groove. The thickness of the valve port is less than the radial length of the limiting member. A limiting groove is provided on the outer wall of the interface. One end of the limiting member close to the axis of the valve port can be inserted into the limiting groove, and one end of the limiting member away from the axis of the valve port abuts against the inner wall of the limiting sleeve.

[0012] By adopting the above technical solution, after the interface is connected to the valve port, the limiting member is inserted into the limiting groove, thereby limiting the positions of the interface and the valve port, and realizing the quick connection between the interface and the valve port.

[0013] Optionally: a retaining ring is arranged at a position on the outer wall of the valve port close to the interface, a retaining groove communicated with the positioning groove is formed on the end face of the limiting sleeve close to the interface, the retaining ring is arranged to slide in the retaining groove, and the retaining ring can abut against the side wall of the retaining groove away from the interface.

[0014] By adopting the above technical solution, the distance that the limiting sleeve moves towards the interface is restricted by the retaining ring, so that the limiting sleeve will not fall off from the valve port.

[0015] Optionally: a rotating part is coaxially arranged on the outer wall of the limiting sleeve, and the rotating part is arranged away from the interface.

[0016] By adopting the above technical solution, when it is necessary to move the limiting sleeve, a force can be directly applied to the rotating part, so that the movement of the limiting sleeve is more convenient.

[0017] Optionally: an anti-disengagement component for preventing the limiting sleeve from moving along its axis is further arranged on the valve port, and the anti-disengagement component includes,

[0018] a torsional elastic member for driving the limiting sleeve to rotate, and the torsional elastic member is sleeved on the valve port;

[0019] and an anti-disengagement rod for restricting the rotation angle of the rotating part, and the anti-disengagement rod is arranged on the valve port;

[0020] a first anti-disengagement groove is formed on the end face of the rotating part away from the interface, a second anti-disengagement groove is formed on the side wall of the first anti-disengagement groove close to the interface, when the limiting member is embedded in the limiting groove, the anti-disengagement rod is arranged at a position on the first anti-disengagement groove away from the second anti-disengagement groove, and when the limiting member is embedded in the positioning groove, the limiting member is arranged in the second anti-disengagement groove.

[0021] By adopting the above technical solution, after the interface is connected to the valve port, the limiting sleeve can rotate a certain angle and is limited by the anti-disengagement rod, so that when the interface is separated from the valve port, it is necessary to rotate the limiting sleeve first and then perform a horizontal movement, making the connection between the interface and the valve port more stable.

[0022] Optionally: a reset component for keeping the limiting member in the positioning groove is further arranged in the valve port, and the reset component includes,

[0023] a reset rod, the reset rod is slidably arranged in the valve port and abuts against one end of the limiting member close to the axis of the valve port;

[0024] and a reset elastic member for pushing the reset rod to move towards the interface;

[0025] The reset rod is coaxially provided with an air flow channel.

[0026] By adopting the above technical solution, when the interface is not connected to the valve port, the reset rod can limit the position of the limiting member, so that the limiting member remains in the positioning groove, making the subsequent connection between the interface and the valve port more convenient.

[0027] Optionally: A first air venting component for opening and closing its opening is arranged in the interface. The first air venting component includes a first closing rod slidably arranged in the interface and a first closing elastic member for pushing the first closing rod to move. A first closing ring is coaxially fixed to the inner cavity of the interface close to the valve port. The first closing rod passes through the first closing ring and closes the first closing ring.

[0028] An opening rod for pushing the first closing rod to move is arranged in the valve port. The opening rod passes through the reset rod, and the opening rod can abut against the end face of the first sealing edge close to the valve port.

[0029] By adopting the above technical solution, the opening of the interface is closed when the interface is not connected to the valve port, and the opening of the interface can be opened after the interface is connected to the valve port. Thus, the switch of the oxygen cylinder can be opened when the interface is not connected to the valve port, and it can be directly used after the interface is connected to the valve port.

[0030] Optionally: A second air venting component for opening and closing the air flow channel is further arranged in the valve port. The second air venting component includes a second closing rod slidably arranged in the air flow channel and a second closing elastic member for pushing the second closing rod to move. A second closing ring is arranged in the opening of the first air flow channel close to the interface. The second closing rod passes through the second closing ring and closes the second closing ring. One end of the second closing elastic member far from the second closing rod abuts against the opening rod. A first air vent hole is coaxially penetrated through the opening rod. A second air vent hole is opened on the end face of the second closing rod close to the opening rod. A plurality of air inlet holes communicating with the second air vent hole are circumferentially opened on the side wall of the second closing rod. The air inlet holes are arranged at one end of the second closing ring far from the interface, and the air inlet holes can move to one end of the second closing ring close to the interface.

[0031] By adopting the above technical solution, the opening of the valve port can be closed when the valve port is connected to the interface, and it can be directly opened after the interface is connected to the valve port.

[0032] Optionally: A connecting sleeve is coaxially arranged outside the interface, and the connecting sleeve is sleeved outside the limiting sleeve.

[0033] By adopting the above technical solution, the contact area between the valve port and the interface is increased, so that the connection between the interface and the valve port is more stable, and the connection part between the two is not easy to deform when being impacted.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. The connection between the valve port and the interface is realized by using a limiting member. The interface can be directly inserted into the valve port, and the positions of both can be limited by the limiting member, making the connection between the interface and the valve port more convenient.

[0036] 2. The position of the limiting member is limited by the reset rod. When the interface is not connected to the valve port, the limiting member can be located in the positioning groove, facilitating the subsequent connection between the interface and the valve port. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0038] Figure 2 is a schematic diagram of an embodiment of the present application for showing the structure of the valve port;

[0039] Figure 3 is a schematic diagram of an embodiment of the present application for showing the structure of the interface;

[0040] Figure 4 is Figure 2 an enlarged view of part A of

[0041] In the figure, 1. Interface; 11. Limiting groove; 12. First sealing ring; 13. First guide rod; 14. Connecting sleeve; 2. Valve port; 21. Retaining ring; 22. Opening rod; 221. First ventilation hole; 3. Limiting assembly; 31. Limiting sleeve; 311. Positioning groove; 312. Retaining groove; 313. Rotating part; 3131. First anti - detachment groove; 3132. Second anti - detachment groove; 32. Limiting member; 33. Limiting elastic member; 4. Anti - detachment assembly; 41. Torsion elastic member; 42. Anti - detachment rod; 5. Reset assembly; 51. Reset rod; 511. Air flow channel; 52. Reset elastic member; 53. Second sealing ring; 6. First ventilation assembly; 61. First sealing rod; 62. First sealing elastic member; 7. Second ventilation assembly; 71. Second sealing rod; 711. Second ventilation hole; 712. Air inlet hole; 72. Second sealing elastic member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The following further details the present application with reference to the accompanying drawings.

[0043] A quick connector for connecting an oxygen cylinder and a breathing mask disclosed in the present application, as Figure 1 shown, includes a valve port 2 for connecting to an oxygen cylinder and an interface 1 for connecting to a breathing mask. The interface 1 is inserted into the valve port 2 to achieve the connection between the two. As Figure 2 and Figure 3As shown in the figure, a limiting component 3 for defining the position of the interface 1 is provided on the valve port 2. The limiting component 3 includes a limiting sleeve 31 rotatably connected to the outer wall of the valve port 2, a plurality of limiting members 32 for defining the position of the interface 1, and a limiting elastic member 33 for pushing the limiting sleeve 31 to move towards the interface 1. The limiting sleeve 31 is coaxially arranged outside the valve port 2. The end face of the limiting sleeve 31 close to the interface 1 can be flush with the end face of the valve port 2 close to the interface 1. A positioning groove 311 is coaxially opened on the end face of the limiting sleeve 31 close to the interface 1. The positioning groove 311 communicates with the inner cavity of the limiting sleeve 31, and the radial distance between the side wall of the positioning groove 311 away from the axis of the valve port 2 and the side wall of the inner cavity of the valve port 2 is greater than the radial length of the limiting member 32. The limiting member 32 is selected as a ball in this embodiment. The limiting members 32 are circumferentially arranged on the valve port 2 and move along the radial direction of the valve port 2. The limiting members 32 penetrate through the valve port 2 so that one end close to the axis of the valve port 2 can be inserted into the inner cavity of the valve port 2, and the end of the limiting member 32 away from the axis of the valve port 2 can be arranged in the positioning groove 311. The limiting elastic member is sleeved on the valve port 2. The limiting elastic member 33 is selected as a spring in this embodiment. One end of the limiting elastic member 33 abuts against the inner wall of the limiting sleeve 31, and the other end of the limiting elastic member 33 abuts against the outer wall of the valve port 2. A limiting groove 11 is coaxially opened on the outer wall of the interface 1. When the interface 1 is inserted into the valve port 2, one end of the limiting member 32 close to the axis of the valve port 2 can be inserted into the limiting groove 11, and the limiting sleeve 31 moves towards the interface 1 under the push of the limiting elastic member 33, so that the end of the limiting member 32 away from the axis of the valve port 2 abuts against the inner wall of the limiting sleeve 31, and the position of the limiting member 32 is defined, thereby realizing the stable connection between the valve port 2 and the interface 1.

[0044] In order to prevent the limiting sleeve 31 from directly falling off the valve port 2 when the limiting elastic member 33 drives it when the interface 1 and the valve port 2 are not connected. A retaining ring 21 is coaxially threadedly connected to the outer wall of the valve port 2 at a position close to the interface 1. A retaining groove 312 is coaxially opened on the end face of the limiting sleeve 31 close to the interface 1. The diameter of the retaining groove 312 is larger than the diameter of the positioning groove 311, and the retaining groove 312 communicates with the positioning groove 311. The retaining ring 21 can slide in the retaining groove 312, and when the limiting member 32 abuts against the inner wall of the limiting groove 11, the retaining ring 21 can abut against the end face of the retaining groove 312, thereby defining the position of the limiting sleeve 31 and making it not easy for the limiting sleeve 31 to directly fall off the valve port 2.

[0045] As Figure 1 and Figure 2 shown in the figure, since there is no directly force-applying position on the surface of the limiting sleeve 31, it is rather troublesome to slide the limiting sleeve 31. Therefore, a rotating part 313 is integrally formed coaxially on the outer wall of the limiting sleeve 31, and the rotating part 313 is arranged at a position of the valve port 2 away from the interface 1. When it is necessary to move the limiting sleeve 31, force can be directly applied to the rotating part 313, making the movement of the limiting sleeve 31 more convenient.

[0046] When in use, when the rotating sleeve is subjected to a force away from the interface 1, the position of the limiting member 32 cannot be limited, which affects the stability of the connection between the interface 1 and the valve port 2. Therefore, an anti-disengagement assembly 4 for preventing the limiting sleeve 31 from moving along its own axis is further provided on the valve port 2. The anti-disengagement assembly 4 includes a torsional elastic member 41 that drives the limiting sleeve 31 to rotate along its axis and an anti-disengagement rod 42 that prevents the limiting sleeve 31 from rotating. The torsional elastic member 41 is selected as a torsion spring in this embodiment. The torsional elastic member 41 is arranged at one end of the limiting elastic member 33 away from the interface 1. One end of the torsional elastic member 41 is connected to the limiting sleeve 31, and the other end of the torsional elastic member 41 is connected to the valve port 2. A first anti-disengagement groove 3131 is formed on the end surface of the rotating portion 313 away from the interface 1. A second anti-disengagement groove 3132 is further formed on the side wall of the first anti-disengagement groove 3131 close to the interface 1. The second anti-disengagement groove 3132 is arranged at the end close to the first anti-disengagement groove 3131. The anti-disengagement rod 42 is threadedly connected to the outer wall of the valve port 2 along the radial direction of the valve port 2, and the anti-disengagement rod 42 can move in the first anti-disengagement groove 3131 and the second anti-disengagement groove 3132. When the end of the limiting member 32 is embedded in the limiting groove 11, the anti-disengagement rod 42 is arranged at a position away from the first anti-disengagement groove 3131 and the second anti-disengagement groove 3132, so that the limiting sleeve 31 needs to rotate a certain angle along its axis before the limiting sleeve 31 can move along its own axis, making it difficult for the interface 1 and the valve port 2 to disengage, and their connection is more stable. When the anti-disengagement rod 42 is arranged in the second anti-disengagement groove 3132, the limiting member 32 is arranged in the positioning groove 311, and the second anti-disengagement groove 3132 gives the limiting sleeve 31 space to move along the axis.

[0047] After the interface 1 is disengaged from the valve port 2, the limiting member 32 will still move towards the inside of the valve port 2 under the drive of the limiting sleeve 31. Therefore, when the valve port 2 is subsequently connected to the interface 1, the limiting member 32 needs to be manually reset. Therefore, a reset assembly 5 for keeping the limiting member 32 in the positioning groove 311 is further provided in the valve port 2. The reset assembly 5 includes a reset rod 51 slidably arranged in the limiting groove 11 and a reset elastic member 52 that pushes the reset rod 51 towards the interface 1. The reset elastic member 52 is selected as a spring in this embodiment. The reset rod 51 is also arranged in the valve port 2, and the reset rod 51 can close the opening of the valve port 2 close to the interface 1. An air flow channel 511 is coaxially penetrated through the end surface of the reset rod 51. The reset elastic member 52 is arranged at one end of the reset rod 51 away from the interface 1. One end of the reset elastic member 52 abuts against the end of the reset rod 51 away from the interface 1, and the other end of the reset rod 51 abuts against the inner wall of the valve port 2. The position of the limiting member 32 is limited by the reset rod 51, so that when the interface 1 is not connected to the valve port 2, the limiting member 32 can still be in the positioning groove 311, and when the interface 1 is connected to the valve port 2, the interface 1 can push the reset rod 51 towards the inside of the valve port 2, so that the reset rod 51 will not affect the connection between the interface 1 and the valve port 2.

[0048] As shown in Figure 2 and Figure 3 After the interface 1 is connected to the valve port 2, gas can flow directly from the interface 1 into the valve port 2 without reopening the valve of the oxygen cylinder. A first ventilation component 6 for opening and closing its opening is arranged in the interface 1. The first ventilation component 6 includes a first closing rod 61 slidably arranged in the interface 1 and a first closing elastic member 62 for pushing the first closing rod 61 to move towards the valve port 2. The first closing elastic member 62 is a spring in this embodiment. A first closing ring 12 is coaxially arranged at a position in the inner cavity of the interface 1 close to the valve port 2. The first closing rod 61 passes through the first closing ring 12 and slides to close the inner cavity of the first closing ring 12. A first guiding rod 13 for guiding the first closing rod 61 is also arranged in the interface 1. The first guiding rod 13 passes through one end of the first closing rod 61 far from the valve port 2. The first closing rod 61 moves along the first guiding rod 13, and the first closing rod 61 can move away from the valve port 2 to open the inner cavity of the first closing ring 12. The first closing elastic member 62 is sleeved on the first guiding rod 13. One end of the first closing elastic member 62 abuts against one end of the first closing rod 61 far from the valve port 2, and the other end of the second closing elastic member 72 abuts against the inner wall of the interface 1. An opening rod 22 for pushing the first closing rod 61 to move towards the first guiding rod 13 is arranged in the valve port 2. The opening rod 22 passes through the air flow channel 511. After the interface 1 is inserted into the valve port 2, the opening rod 22 can abut against the first closing rod 61 to push the first closing rod 61 to move away from the valve port 2, so as to realize the communication between the interface 1 and the valve port 2. When the interface 1 and the valve port 2 are not connected, the first closing rod 61 can close the opening of the interface 1, so that air leakage will not occur even when the oxygen cylinder is opened in advance.

[0049] A second ventilation component 7 for opening and closing the air flow channel 511 is further provided inside the valve port 2. The second ventilation component 7 includes a second closing rod 71 slidably disposed in the air flow channel 511 and a second closing elastic member 72 that pushes the second closing rod 71 to move towards the interface 1. The second closing elastic member 72 is a spring in this embodiment. A second closing ring 53 is coaxially threadedly connected to the inner cavity of the air flow channel 511 near the interface 1. The second closing rod 71 is sleeved on the opening rod 22 and slides, and the diameter of the second closing rod 71 is smaller than the inner diameter of the air flow channel 511. The second closing rod 71 can pass through the second closing ring 53 and close the second closing ring 53. The second closing elastic member 72 is sleeved on the opening rod 22. One end of the second closing elastic member 72 abuts against the second closing plate, and the other end of the second closing elastic member 72 abuts against the inner wall of the valve port 2. When the interface 1 is not inserted into the valve port 2, the second closing rod 71 closes the second closing ring 53. Then the interface 1 drives the reset rod 51 to move towards the valve port 2. Then the second closing rod 71 abuts against the opening rod 22 and thus pushes the first closing rod 61 to move, realizing the movement of the first closing rod 61 away from the valve port 2.

[0050] As Figure 2 and Figure 4 shown, a first ventilation hole 221 is coaxially penetrated through the opening rod 22. A second ventilation hole 711 is opened at one end of the second closing rod 71 close to the opening rod 22. The first ventilation hole 221 is communicated with the second ventilation hole 711. A plurality of air inlet holes 712 are circumferentially opened on the outer wall of the second closing rod 71. The air inlet holes 712 are communicated with the second ventilation hole 711. When the second closing rod 71 does not extend out of the second closing ring 53, the air inlet holes 712 are located at one end of the second closing ring 53 away from the interface 1. When the second closing rod 71 extends out of the second closing ring 53, the air inlet holes 712 are located at one end of the second closing ring 53 close to the interface 1.

[0051] As Figure 3 shown, in order to make the connection between the interface 1 and the valve port 2 more stable, a connecting sleeve 14 is coaxially arranged outside the interface 1. The inner cavity opening of the connecting sleeve 14 close to the valve port 2 is flared. The connecting sleeve 14 can be sleeved outside the limiting sleeve 31, thereby increasing the contact area between the valve port 2 and the interface 1 and making the connection between the two more stable.

[0052] The implementation principle of this embodiment is as follows: Move the interface 1 towards the valve port 2. The interface 1 pushes the reset rod 51 to move towards the inside of the valve port 2. When the reset rod 51 moves, the opening rod 22 abuts against the second closing rod 71, restricting the position of the second closing rod 71. Then the interface 1 continues to move towards the inside of the valve port 2, and the second closing rod 71 drives the first closing rod 61 to move towards the inside of the interface 1, realizing the opening of the interface 1 and the valve port 2. After that, the interface 1 continues to move. When the reset rod 51 disengages from the contact with the limiting member 32, the limiting member 32 moves towards the axis of the valve port 2 under the push of the limiting sleeve 31, so that the limiting member 32 is inserted into the limiting groove 11. The limiting sleeve 31 rotates and moves a certain distance towards the interface 1 under the push of the limiting elastic member 33 and the torsion elastic member 41, and the anti-disengagement rod 42 moves into the first anti-disengagement groove 3131.

[0053] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A quick connector for connecting an oxygen cylinder to a breathing mask, characterized in that: It includes a valve port (2) for connecting to an oxygen cylinder and an interface (1) for connecting to a breathing mask. The interface (1) is connected to the valve port (2), and a limiting component (3) for limiting the position of the interface (1) is connected to the valve port (2). The limiting component (3) includes, a limiting sleeve (31) which is sleeved outside the valve port (2) and slides along the valve port (2); a limiting member (32) which penetrates through the valve port (2) and moves radially along the valve port (2); and a limiting elastic member (33) which is sleeved on the valve port (2) and pushes the limiting sleeve (31) to move towards the interface (1); a positioning groove (311) for limiting the position of the limiting member (32) is formed on the end face of the limiting sleeve (31) close to the interface (1). One end of the limiting member (32) away from the axis of the valve port (2) is located in the positioning groove (311). The thickness of the valve port (2) is less than the radial length of the limiting member (32). A limiting groove (11) is provided on the outer wall of the interface (1). One end of the limiting member (32) close to the axis of the valve port (2) can be inserted into the limiting groove (11), and one end of the limiting member (32) away from the axis of the valve port (2) abuts against the inner wall of the limiting sleeve (31).

2. The quick connector for connecting an oxygen cylinder and a breathing mask according to claim 1, wherein: A retaining ring (21) is provided at a position on the outer wall of the valve port (2) close to the interface (1). A retaining groove (312) communicating with the positioning groove (311) is formed on the end face of the limiting sleeve (31) close to the interface (1). The retaining ring (21) is arranged to slide in the retaining groove (312), and the retaining ring (21) can abut against the side wall of the retaining groove (312) away from the interface (1).

3. The quick connector for connecting an oxygen cylinder and a breathing mask according to claim 1, characterized in that: A rotating part (313) is coaxially arranged on the outer wall of the limiting sleeve (31), and the rotating part (313) is arranged away from the interface (1).

4. The quick connector for connecting an oxygen cylinder to a breathing mask according to claim 3, characterized in that: An anti - detachment component (4) for preventing the limiting sleeve (31) from moving along its axis is also provided on the valve port (2). The anti - detachment component (4) includes, a torsional elastic member (41) for driving the limiting sleeve (31) to rotate. The torsional elastic member (41) is sleeved on the valve port (2); and an anti - detachment rod (42) for limiting the rotation angle of the rotating part (313). The anti - detachment rod (42) is arranged on the valve port (2); A first anti - detachment groove (3131) is formed on the end face of the rotating part (313) away from the interface (1). A second anti - detachment groove (3132) is formed on the side wall of the first anti - detachment groove (3131) close to the interface (1). When the limiting member (32) is embedded in the limiting groove (11), the anti - detachment rod (42) is arranged at a position of the first anti - detachment groove (3131) away from the second anti - detachment groove (3132). When the limiting member (32) is embedded in the positioning groove (311), the limiting member (32) is arranged in the second anti - detachment groove (3132).

5. The quick connector for connecting an oxygen cylinder to a breathing mask according to claim 1, characterized in that: A reset component (5) for keeping the limiting member (32) in the positioning groove (311) is also provided in the valve port (2). The reset component (5) includes, A reset rod (51) is slidably disposed within the valve port (2) and abuts against one end of the limiting member (32) close to the axis of the valve port (2); And a reset elastic member (52) for pushing the reset rod (51) to move towards the interface (1); The reset rod (51) is coaxially provided with an air flow channel (511).

6. The quick connector for connecting an oxygen cylinder to a breathing mask according to claim 5, characterized in that: A first ventilation assembly (6) for opening and closing the opening of the interface (1) is disposed within the interface (1). The first ventilation assembly (6) includes a first closing rod (61) slidably disposed within the interface (1) and a first closing elastic member (62) for pushing the first closing rod (61) to move. A first closing ring (12) is coaxially fixed to the inner cavity of the interface (1) close to the valve port (2). The first closing rod (61) passes through the first closing ring (12) and closes the first closing ring (12); An opening rod (22) for pushing the first closing rod (61) to move is disposed within the valve port (2). The opening rod (22) passes through the reset rod (51), and the opening rod (22) can abut against the end face of the first sealing edge close to the valve port (2).

7. A quick connector for connecting an oxygen cylinder to a breathing mask according to claim 6, characterized in that: A second ventilation assembly (7) for opening and closing the air flow channel (511) is further disposed within the valve port (2). The second ventilation assembly (7) includes a second closing rod (71) slidably disposed within the air flow channel (511) and a second closing elastic member (72) for pushing the second closing rod (71) to move. A second closing ring (53) is disposed within the opening of the air flow channel (511) close to the interface (1). The second closing rod (71) passes through the second closing ring (53) and closes the second closing ring (53). One end of the second closing elastic member (72) remote from the second closing rod (71) abuts against the opening rod (22); A first ventilation hole (221) is coaxially penetrated through the opening rod (22). A second ventilation hole (711) is formed on the end face of the second closing rod (71) close to the opening rod (22). A plurality of air intake holes (712) communicating with the second ventilation hole (711) are circumferentially formed on the side wall of the second closing rod (71). The air intake holes (712) are disposed at one end of the second closing ring (53) remote from the interface (1), and the air intake holes (712) can move to one end of the second closing ring (53) close to the interface (1).

8. A quick connector for connecting an oxygen cylinder to a breathing mask according to claim 7, characterized in that: A connecting sleeve (14) is coaxially disposed outside the interface (1), and the connecting sleeve (14) is sleeved outside the limiting sleeve (31).

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