A detachable breathing mask for firefighters to meet long-term rescue needs

Abstract

The present invention discloses a detachable breathing mask for firefighters to meet long-time rescue needs, which relates to the technical field of breathing masks and includes a mask body. A connecting pipe is installed on the side of the mask body. In the present invention, a gas sensor can detect whether oxygen inhalation is required in the external environment, and then the driving mechanism can drive the rotating ball to rotate. Thus, when oxygen inhalation is needed, breathing is carried out through an oxygen cylinder, and when it is not needed, exhalation is carried out through a gas filter canister, which improves the usage time of the oxygen cylinder. When there is no oxygen in the oxygen cylinder, pressing the mounting post can make the gas sensor enter the connecting pipe, and at the same time, under the action of the reset mechanism, it is switched to exhalation through the gas filter canister. The alarm trigger mechanism corresponds to the driving mechanism. When the filtering effect is poor, the air in this connecting pipe is not clean, and the gas sensor transmits a signal to make the driving mechanism rotate to trigger the alarm trigger mechanism to trigger the alarm to sound, thereby reminding the user that replacement is needed.

Description

Technical Field

[0001] The present invention relates to the technical field of breathing masks, and particularly to a detachable breathing mask for firefighters to meet long-term rescue needs. Background Art

[0002] During fire rescue, a large amount of toxic gas is generated. Therefore, rescue workers often carry air respirators. The principle of an air respirator is to compress air in a gas cylinder and supply it to the rescue workers. The basic principle is to combine a filter canister with a face mask for air breathing. However, the air in the gas cylinder will be used up, and generally, it can only support the rescue workers to work for 25 minutes.

[0003] Existing breathing masks are generally connected to oxygen cylinders during use. Generally, the oxygen in the oxygen cylinder is used only when entering the rescue. However, during the rescue process, the rescue workers are not always in the toxic gas, but the oxygen cylinder supplies oxygen all the time. Therefore, it cannot be switched according to needs, and it is impossible to stop the oxygen supply when the rescue workers are not in the position of toxic gas, which is not convenient for long-term rescue. Moreover, after the oxygen cylinder is used up, it is impossible to know whether the filtering state of the filter canister meets the requirements. Therefore, we disclose a detachable breathing mask for firefighters to meet long-term rescue needs to meet people's requirements. Summary of the Invention

[0004] The purpose of this application is to provide a detachable breathing mask for firefighters to meet long-term rescue needs, so as to solve the problems raised in the above background art.

[0005] To achieve the above object, the present application provides the following technical solutions: A detachable breathing mask for firefighters to meet long-term rescue needs, including a mask body. A connecting pipe is installed on the side of the mask body. A gas filter canister is installed on the side of the connecting pipe away from the mask body. A fixing plate is installed on the inner wall of the connecting pipe. A rotating hole is opened on the side of the fixing plate. An arc-shaped annular groove is opened on the inner wall of the rotating hole. A rotating ball is rotatably installed in the arc-shaped annular groove and the rotating hole. A full ventilation hole is opened on the side of the rotating ball. A half ventilation hole perpendicular to the full ventilation hole is opened on one inner wall of the full ventilation hole. A corresponding hole is opened on the inner wall of the arc-shaped annular groove, and the position of the corresponding hole corresponds to that of the full ventilation hole. An installation pipe communicating with the connecting pipe is installed at the bottom of the connecting pipe, and the position of the installation pipe corresponds to that of the corresponding hole. A rotating hole is opened on the inner wall of the arc-shaped annular groove. A rotating shaft is installed on the side of the rotating ball. One end of the rotating shaft penetrates through the rotating hole and is installed with a large gear. A fixing box is installed on the top of the connecting pipe. The top of the large gear is connected to the top inner wall of the fixing box through a reset mechanism. A driving mechanism is installed on the side of the reset mechanism through a sliding mechanism. An alarm triggering mechanism is installed on the sliding mechanism, and the position of the alarm triggering mechanism corresponds to that of the driving mechanism. The driving mechanism is cooperatively installed with the large gear. A rectangular hole is opened on the inner wall of the connecting pipe. An installation column is slidably installed in the rectangular hole. The side of the installation column is cooperatively installed with the sliding mechanism through two pressing mechanisms. The side of the installation column is connected to the top of the connecting pipe through a fixing mechanism. A detection hole located outside the connecting pipe is opened on the side of the installation column. A gas sensor is installed on the bottom inner wall of the detection hole. A controller, an alarm, and a storage battery are installed on the top of the fixing box. The gas sensor, the driving mechanism, and the controller are connected.

[0006] Preferably, the reset mechanism includes a reset rod installed on the top inner wall of the fixing box. A reset groove is opened on the top of the large gear. The central axes of the reset rod, the reset groove, the large gear, and the rotating shaft are the same. The bottom end of the reset rod extends into the reset groove. A spiral spring is installed on the side of the reset rod. One end of the spiral spring away from the reset rod is installed on the inner wall of the reset groove. The side of the reset rod is connected to the sliding mechanism through a connecting block.

[0007] Preferably, the sliding mechanism includes a moving frame installed on the side of the connecting block away from the reset rod. Two vertical rods are installed on the top of the moving frame. A sliding rod is installed at one end of the two vertical rods away from the reset rod. A U-shaped plate is slidably sleeved on the two sliding rods. The U-shaped plate includes a horizontal plate and two vertical plates. The top ends of the two vertical plates are respectively installed on the two side parts of the horizontal plate. The horizontal plate is slidably sleeved on the two sliding rods. Connecting springs are sleeved on the two sliding rods. One end of each of the two connecting springs is installed on the side part of the U-shaped plate, and the other ends of the two connecting springs are respectively installed on the side parts of the two vertical rods. The driving mechanism is installed on the bottom of the horizontal plate, and the alarm triggering mechanism is installed on the side of the moving frame. Oblique grooves are respectively formed on the side parts of the two vertical plates away from each other, and the two oblique grooves are respectively installed in cooperation with the two pressing mechanisms.

[0008] Preferably, the driving mechanism includes a motor installed on the bottom of the horizontal plate. A small gear is installed on the output shaft of the motor. The small gear meshes with the large gear. The number of teeth of the large gear is a multiple of four. The circumference of the small gear is one-half of that of the large gear. A cam is fixedly sleeved on the output shaft of the small gear. The pressing end of the cam is away from the reset rod, and the position of the cam corresponds to that of the alarm triggering mechanism.

[0009] Preferably, the alarm triggering mechanism includes round holes formed in the side of the moving frame away from the reset rod. Return rods are slidably installed in the two round holes. A pressing plate is installed at one end of the two return rods close to the reset rod. A first conductive block and a second conductive block are respectively installed on the side parts of the pressing plate and the moving frame close to each other. The first conductive block and the second conductive block are opposite in position and have a gap. Fixed springs are sleeved on the two return rods. The two ends of each of the two fixed springs are respectively installed on the side parts of the moving frame and the pressing plate close to each other. The position of the pressing plate corresponds to that of the cam. The second conductive block and the second conductive block are connected to the alarm.

[0010] Preferably, the pressing mechanism includes an L-shaped pressing rod installed on the side of the mounting column. A pressing column is installed on the side of the L-shaped pressing rod close to the U-shaped plate. One end of the pressing column away from the L-shaped pressing rod extends into the oblique groove.

[0011] Preferably, the fixing mechanism includes a mounting block installed on the top of the connecting pipe. A fixing hole is formed in the side of the mounting block. An L-shaped clamping rod is slidably installed in the fixing hole. Two clamping slots are formed in the side of the mounting column. One end of the L-shaped clamping rod extends into the lower clamping slot. A return spring is installed on the side of the L-shaped clamping rod. The two ends of the return spring are respectively installed on the sides of the mounting block and the L-shaped clamping rod close to each other.

[0012] Preferably, the distance between the inner wall of the bottom side of the upper clamping slot and the inner wall of the top side of the lower clamping slot is equal to the length of the inclined slot along the central axis direction of the return rod. The length of the inclined slot along the central axis direction of the return rod is greater than the length between the inner wall of the top side of the detection hole and the inner wall of the connecting pipe.

[0013] Preferably, the length of the inclined slot along the central axis direction of the sliding rod is equal to the distance between the pressing end of the cam and the side of the pressing plate away from the return rod plus the distance between the mutually close sides of the second conductive block and the first conductive block.

[0014] Preferably, through holes are formed in the side of the fixing box close to the mounting column. One ends of the two L-shaped pressing rods penetrate through the through holes.

[0015] In summary, the technical effects and advantages of the present invention:

[0016] In the present invention, the gas sensor can detect whether oxygen inhalation is required in the external environment. Then, the driving mechanism can be driven to drive the rotating ball to rotate. Thus, when oxygen inhalation is required, breathing can be carried out through the oxygen tank. When it is not required, exhalation can be carried out through the gas filter canister, improving the usage time of the oxygen tank. When the oxygen tank has no oxygen, pressing the mounting column can make the gas sensor enter the connecting pipe. At the same time, under the action of the reset mechanism, it is switched to exhalation through the gas filter canister. The alarm trigger mechanism corresponds to the driving mechanism. When the filtering effect is poor, the air in this connecting pipe is not clean. The gas sensor transmits a signal to make the driving mechanism rotate, causing the alarm trigger mechanism to trigger the alarm to sound, thereby reminding the user that replacement is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram in the embodiment of the present application;

[0019] Figure 2 It is a first - perspective three - dimensional view of the embodiment of the present application without the mask main body;

[0020] Figure 3 is Figure 2 the rear view in;

[0021] Figure 4 is Figure 3 the sectional view taken along A - A of;

[0022] Figure 5 It is a three - dimensional view of the rotating ball in the embodiment of the present application;

[0023] Figure 6 It is a second - perspective three - dimensional view of the embodiment of the application without the mask main body;

[0024] Figure 7 is Figure 6 the enlarged view of a partial structure of;

[0025] Figure 8 is Figure 6 the enlarged view of the structure at A of;

[0026] Figure 9 It is a third - perspective three - dimensional view of the embodiment of the application without the mask main body;

[0027] Figure 10 is Figure 9 the enlarged view of a partial structure of.

[0028] In the figure: 1. Mask main body; 2. Connecting pipe; 3. Gas filter canister; 4. Fixed disk; 5. Rotating ball; 6. Semi - ventilation hole; 7. Full - ventilation hole; 8. Corresponding hole; 9. Installation pipe; 10. Rotation hole; 11. Rotation shaft; 12. Fixed box; 13. Controller; 14. Alarm; 15. Battery; 16. Installation post; 17. Gas sensor; 18. U - shaped plate; 19. Motor; 20. Small gear; 21. Reset rod; 22. Large gear; 23. Upright rod; 24. Helical spring; 25. L - shaped pressing rod; 26. Card slot; 27. Inclined slot; 28. Slide rod; 29. Connecting spring; 30. Moving frame; 31. Return rod; 32. Extrusion plate; 33. Fixed spring; 34. First conductive block; 35. Second conductive block; 36. Cam; 37. Installation block; 38. L - shaped clamping rod; 39. Rectangular hole; 40. Pressing column. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment: Refer to Figure 1-10 A detachable breathing mask for firefighters to meet long-term rescue requirements as shown, including a mask body 1. The mask body 1 can be connected to a connecting strap and worn on the head. A connecting pipe 2 is installed on the side of the mask body 1. A filter canister 3 is installed on the side of the connecting pipe 2 away from the mask body 1. The filter canister 3 can be connected to the connecting pipe 2 by a threaded connection and can be disassembled. A fixed disk 4 is installed on the inner wall of the connecting pipe 2. A rotating hole is opened on the side of the fixed disk 4. An arc-shaped ring groove is opened on the inner wall of the rotating hole. A rotating ball 5 is rotatably installed in the arc-shaped ring groove and the rotating hole. The side of the rotating ball 5 is attached to the inner wall of the arc-shaped ring groove through a sealing gasket for sealing. A full ventilation hole 7 is opened on the side of the rotating ball 5. A semi-ventilation hole 6 perpendicular to the full ventilation hole 7 is opened on one inner wall of the full ventilation hole 7. A corresponding hole 8 is opened on the inner wall of the arc-shaped ring groove, and the position of the corresponding hole 8 corresponds to that of the full ventilation hole 7. An installation pipe 9 communicating with the connecting pipe 2 is installed at the bottom of the connecting pipe 2, and the position of the installation pipe 9 corresponds to that of the corresponding hole 8. A rotating hole 10 is opened on the inner wall of the arc-shaped ring groove. A rotating shaft 11 is installed on the side of the rotating ball 5. One end of the rotating shaft 11 passes through the rotating hole 10 and is installed with a large gear 22. A sealing gasket fitting the rotating shaft 11 is installed on the inner wall of the rotating hole 10 for sealing. A fixed box 12 is installed on the top of the connecting pipe 2. The top of the large gear 22 is connected to the top inner wall of the fixed box 12 through a reset mechanism. A driving mechanism is installed on the side of the reset mechanism through a sliding mechanism. An alarm triggering mechanism is installed on the sliding mechanism, and the position of the alarm triggering mechanism corresponds to that of the driving mechanism. The driving mechanism is installed in cooperation with the large gear 22. A rectangular hole 39 is opened on the inner wall of the connecting pipe 2. An installation column 16 is slidably installed in the rectangular hole 39. A sealing sleeve is arranged on the inner wall of the rectangular hole and fits the installation column 16 for sealing. The side of the installation column 16 is installed in cooperation with the sliding mechanism through two pressing mechanisms. The side of the installation column 16 is connected to the top of the connecting pipe 2 through a fixing mechanism. A detection hole located outside the connecting pipe 2 is opened on the side of the installation column 16. A gas sensor 17 is installed on the bottom inner wall of the detection hole. A controller 13, an alarm 14, and a storage battery 15 are installed on the top of the fixed box 12. The gas sensor 17, the driving mechanism, and the controller 13 are connected.

[0031] With the above structure: The gas sensor 17 can detect whether oxygen inhalation is required in the external environment. Then, the driving mechanism can drive the rotating ball 5 to rotate. Thus, when oxygen inhalation is needed, breathing can be carried out through the oxygen tank, and when it is not needed, exhalation can be carried out through the gas filter canister 3, improving the usage time of the oxygen tank. When the oxygen tank runs out of oxygen, pressing the mounting post 16 can make the gas sensor 17 enter the connecting pipe 2. At the same time, under the action of the reset mechanism, the exhalation mode is switched to the gas filter canister 3. The alarm trigger mechanism corresponds to the driving mechanism. When the filtering effect is poor, the air in this connecting pipe 2 is not clean, and the gas sensor 17 transmits a signal to make the driving mechanism rotate, causing the alarm trigger mechanism to trigger the alarm 14 to sound an alarm, thus reminding the user that replacement is needed.

[0032] The reset mechanism includes a reset rod 21 installed on the inner wall of the top side of the fixed box 12. A reset groove is formed at the top of the large gear 22. The central axes of the reset rod 21, the reset groove, the large gear 22, and the rotating shaft 11 are the same. The bottom end of the reset rod 21 extends into the reset groove. A volute spring 24 is installed on the side of the reset rod 21. The end of the volute spring 24 away from the reset rod 21 is installed on the inner wall of the reset groove. The side of the reset rod 21 is connected to the sliding mechanism through a connecting block. When breathing is carried out using the oxygen tank, the volute spring 24 is in a deformed state. When the small gear 20 is separated from the large gear 22, due to the volute spring 24 being in a deformed state, at this time, under the action of the volute spring 24, the large gear 22 returns to its original state, making the full ventilation hole 7 parallel to the rotating hole, and the corresponding hole 8 corresponding to the side of the rotating ball 5. The oxygen tank is no longer ventilated, and at this time, exhalation can be carried out through the gas filter canister 3, thereby switching the ventilation mode.

[0033] The sliding mechanism includes a moving frame 30 installed on the side of the connecting block away from the reset rod 21. Two vertical rods 23 are installed on the top of the moving frame 30. The ends of the two vertical rods 23 away from the reset rod 21 are installed with a sliding rod 28. A U-shaped plate 18 is slidably sleeved on the two sliding rods 28. The U-shaped plate 18 includes a horizontal plate and two vertical plates. The top ends of the two vertical plates are respectively installed on the two side parts of the horizontal plate; the horizontal plate is slidably sleeved on the two sliding rods 28. Connecting springs 29 are sleeved on the two sliding rods 28. One end of each of the two connecting springs 29 is installed on the side of the U-shaped plate 18, and the other ends of the two connecting springs 29 are respectively installed on the sides of the two vertical rods 23. The driving mechanism is installed at the bottom of the horizontal plate, and the alarm trigger mechanism is installed on the side of the moving frame 30. Oblique grooves 27 are formed on the sides of the two vertical plates away from each other, and the two oblique grooves 27 are respectively installed in cooperation with the two pressing mechanisms. The sliding mechanism can slide back and forth, thereby enabling the separation or engagement of the small gear 20 and the large gear 22.

[0034] The driving mechanism includes a motor 19 installed at the bottom of the horizontal plate. A small gear 20 is installed on the output shaft of the motor 19. The small gear 20 meshes with a large gear 22. The number of teeth of the large gear 22 is a multiple of four. The circumference of the small gear 20 is half of that of the large gear 22. A cam 36 is fixedly sleeved on the output shaft of the small gear 20. The extrusion end of the cam 36 is far from the reset rod 21. The position of the cam 36 corresponds to that of the alarm triggering mechanism. The advantage of such a setting is that when the small gear 20 rotates half a turn, it can drive the large gear 22 to rotate a quarter of a turn, so as to switch the positions of the full vent hole 7 and the half vent hole 6, and then switch the air intake mode.

[0035] The alarm triggering mechanism includes round holes opened on the side of the moving frame 30 away from the reset rod 21. Two return rods 31 are slidably installed in the two round holes. One ends of the two return rods 31 close to the reset rod 21 are installed with an extrusion plate 32. First conductive blocks 34 and second conductive blocks 35 are respectively installed on the side parts of the extrusion plate 32 and the moving frame 30 close to each other. The first conductive blocks 34 and the second conductive blocks 35 are corresponding in position and have a gap. Fixed springs 33 are sleeved on the two return rods 31. Two ends of the two fixed springs 33 are respectively installed on the side parts of the moving frame 30 and the extrusion plate 32 close to each other. The position of the extrusion plate 32 corresponds to that of the cam 36. The second conductive blocks 35 and the second conductive blocks 35 are connected to the alarm 14. When the filtering effect is poor, the air in the connecting pipe 2 is not clean. The gas sensor 17 transmits a signal to the motor 19, so that the cam 36 rotates half a turn in the reverse direction, thereby squeezing the extrusion plate 32 and then making the first conductive block 34 contact the second conductive block 35, and the alarm 14 emits an alarm, thus reminding the user that replacement is needed.

[0036] The extrusion mechanism includes an L-shaped pressing rod 25 installed on the side of the mounting post 16. A pressing column 40 is installed on the side of the L-shaped pressing rod 25 close to the U-shaped plate 18. One end of the pressing column 40 far from the L-shaped pressing rod 25 extends into the inclined slot 27. Through the arrangement of the pressing column 40, the two L-shaped pressing rods 25 move to drive the two pressing columns 40 to move. The two pressing columns 40 move to squeeze the inner walls of the two inclined slots 27, so that the U-shaped plate 18 slides on the two sliding rods 28, so as to be switched.

[0037] The fixing mechanism includes a mounting block 37 installed on the top of the connecting pipe 2. A fixing hole is opened on the side of the mounting block 37. An L-shaped clamping rod 38 is slidably installed in the fixing hole. Two clamping slots 26 are opened on the side of the mounting post 16. One end of the L-shaped clamping rod 38 extends into the lower clamping slot 26. A reset spring is installed on the side of the L-shaped clamping rod 38. Two ends of the reset spring are respectively installed on the side parts of the mounting block 37 and the L-shaped clamping rod 38 close to each other. Through the arrangement of the fixing mechanism, the position of the mounting post 16 can be fixed.

[0038] The distance between the inner bottom wall of the upper card slot 26 and the inner top wall of the lower card slot 26 is equal to the length of the inclined slot 27 along the central axis direction of the reset rod 21, and the length of the inclined slot 27 along the central axis direction of the reset rod 21 is greater than the length between the inner top wall of the detection hole and the inner wall of the connecting pipe 2. The advantage of such a setting is that the L-shaped clamping rod 38 can enter the two card slots 26. At the same time, when the L-shaped clamping rod 38 enters the upper card slot 26, the gas sensor 17 can be completely located inside the connecting pipe 2, so as to detect the internal air.

[0039] The length of the inclined slot 27 along the central axis direction of the sliding rod 28 is equal to the distance between the extrusion end of the cam 36 and the side of the extrusion plate 32 away from the return rod 31 plus the distance between the mutually approaching sides of the second conductive block 35 and the first conductive block 34. The advantage of such a setting is that the distance that the U-shaped plate 18 slides after the two pressure columns 40 move to squeeze the inner walls of the two inclined slots 27 can enable the cam 36 to contact the extrusion plate 32 and then squeeze the extrusion plate 32 to move it. The movement of the extrusion plate 32 drives the first conductive block 34 to contact the second conductive block 35, and the two fixed springs 33 are deformed. The first conductive block 34 contacts the second conductive block 35, so that the alarm 14 issues an alarm.

[0040] Through holes are provided on the side of the fixed box 12 close to the mounting post 16, and one ends of the two L-shaped pressing rods 25 penetrate through the through holes. The advantage of such a setting is that it is convenient to avoid the L-shaped pressing rods 25.

[0041] Working principle of the present invention:

[0042] During use, the mask body 1 can be worn, the mounting pipe 9 on the connecting pipe 2 is connected to an oxygen tank through a hose, and then a gas filter canister 3 is connected to the side of the connecting pipe 2 away from the mask body 1. When entering a rescue site, the gas sensor 17 can detect whether oxygen inhalation is required in the current environment. If the air is normal, the gas sensor 17 transmits a signal to the controller 13, and the controller 13 controls the motor 19 to start and rotate half a turn, so that the small gear 20 rotates half a turn, and then the large gear 22 rotates a quarter of a turn. The rotation of the large gear 22 drives the rotating shaft 11 and the rotating ball 5 to rotate, so that the semi-ventilation hole 6 moves away from the mounting pipe 9. The rotation of the rotating ball 5 makes the full-ventilation hole 7 parallel to the rotating hole. At this time, the corresponding hole 8 corresponds to the side of the rotating ball 5, and the oxygen tank stops ventilating. At this time, exhalation can be carried out through the gas filter canister 3, thereby increasing the service time of the oxygen tank and meeting the needs of long-term rescue. When it is detected that oxygen inhalation is required in the current environment, at this time, the rotating ball 5 and the large gear 22 return to their original states, the volute spring 24 is deformed, the rotating ball 5 makes the full-ventilation hole 7 perpendicular to the rotating hole, and at the same time the semi-ventilation hole 6 is parallel to the rotating hole, so that breathing can be carried out through the oxygen tank;

[0043] During a long-term rescue operation, when the oxygen tank runs out of oxygen, pull the L-shaped lever 38 to move it out of the slot 26 at this time. The return spring deforms, and then press the mounting post 16 to enable the gas sensor 17 to enter the connecting pipe 2. The gas sensor 17 is located inside the connecting pipe 2 so that the air inside the connecting pipe 2 can be detected and used. At the same time, the movement of the mounting post 16 drives the movement of the two L-shaped pressing levers 25. The movement of the two L-shaped pressing levers 25 drives the movement of the two pressing posts 40. The movement of the two pressing posts 40 squeezes the inner walls of the two inclined slots 27, so that the U-shaped plate 18 slides on the two sliding rods 28. The movement of the U-shaped plate 18 drives the motor 19, the small gear 20 and the cam 36 to move. The small gear 20 is separated from the large gear 22. At this time, the full ventilation hole 7 is perpendicular to the rotating hole. Since the volute spring 24 is in a deformed state, under the action of the volute spring 24 at this time, the large gear 22 returns to its original state, making the full ventilation hole 7 parallel to the rotating hole, and the corresponding hole 8 corresponds to the side of the rotating ball 5. The oxygen tank stops ventilating. At this time, exhalation can be carried out through the gas filter canister 3, thereby switching the ventilation mode;

[0044] At the same time, the movement of the motor 19 drives the movement of the cam 36. When the L-shaped lever 38 corresponds to the position of the upper slot 26, at this time the gas sensor 17 is completely located inside the connecting pipe 2. Under the action of the return spring, the L-shaped lever 38 enters the upper slot 26, thereby fixing the mounting post 16. At this time, the cam 36 contacts the pressing plate 32 and then squeezes the pressing plate 32 to move it. The movement of the pressing plate 32 drives the first conductive block 34 to contact the second conductive block 35, and the two fixing springs 33 deform. The first conductive block 34 contacts the second conductive block 35, so that the alarm 14 emits an alarm. Since the air inside the connecting pipe 2 is filtered by the gas filter canister 3 and the air is relatively clean, the gas sensor 17 transmits a signal to the controller 13, which causes the motor 19 to rotate half a turn. The rotation of the motor 19 drives the L-shaped lever 38 to rotate, so that the pressing end of the L-shaped lever 38 moves away from the pressing plate 32. Under the action of the two fixing springs 33, the first conductive block 34 is separated from the second conductive block 35, and the alarm no longer sounds. When the filtering effect is poor, the air inside this connecting pipe 2 is not clean. The gas sensor 17 transmits a signal to the motor 19, causing the cam 36 to rotate half a turn in the reverse direction, thereby squeezing the pressing plate 32 and making the first conductive block 34 contact the second conductive block 35. The alarm 14 emits an alarm, thus reminding the user that replacement is needed.

[0045] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A detachable breathing mask for firefighters to meet long-term rescue needs, characterized in that, It includes a mask body (1), a connecting pipe (2) is installed on the side of the mask body (1), a gas filter canister (3) is installed on the side of the connecting pipe (2) away from the mask body (1), a fixing plate (4) is installed on the inner wall of the connecting pipe (2), a rotating hole is formed on the side of the fixing plate (4), an arc-shaped ring groove is formed on the inner wall of the rotating hole, a rotating ball (5) is rotatably installed in the arc-shaped ring groove and the rotating hole, a full ventilation hole (7) is formed on the side of the rotating ball (5), a half ventilation hole (6) perpendicular to the full ventilation hole (7) is formed on one inner wall of the full ventilation hole (7), a corresponding hole (8) is formed on the inner wall of the arc-shaped ring groove, and the position of the corresponding hole (8) corresponds to that of the full ventilation hole (7). An installation pipe (9) communicated with the connecting pipe (2) is installed at the bottom of the connecting pipe (2), and the position of the installation pipe (9) corresponds to that of the corresponding hole (8). A rotating hole (10) is formed on the inner wall of the arc-shaped ring groove, a rotating shaft (11) is installed on the side of the rotating ball (5), one end of the rotating shaft (11) penetrates through the rotating hole (10) and a large gear (22) is installed. A fixing box (12) is installed at the top of the connecting pipe (2), the top of the large gear (22) is connected with the top inner wall of the fixing box (12) through a reset mechanism, a driving mechanism is installed on the side of the reset mechanism through a sliding mechanism, an alarm triggering mechanism is installed on the sliding mechanism, the alarm triggering mechanism corresponds to the position of the driving mechanism, the driving mechanism is cooperatively installed with the large gear (22), a rectangular hole (39) is formed on the inner wall of the connecting pipe (2), an installation column (16) is slidably installed in the rectangular hole (39), the side of the installation column (16) is cooperatively installed with the sliding mechanism through two pressing mechanisms, the side of the installation column (16) is connected with the top of the connecting pipe (2) through a fixing mechanism, a detection hole located outside the connecting pipe (2) is formed on the side of the installation column (16), and a gas sensor (17) is installed on the bottom inner wall of the detection hole. A controller (13), an alarm (14) and a storage battery (15) are installed at the top of the fixing box (12), and the gas sensor (17), the driving mechanism and the controller (13) are connected; The gas sensor (17) can detect whether oxygen inhalation is required in the external environment. Pressing the installation column (16) can make the gas sensor (17) enter the connecting pipe (2). Since the gas sensor (17) is located in the connecting pipe (2), the air in the connecting pipe (2) can be detected.

2. The detachable breathing mask for firefighters to meet long-term rescue according to claim 1, characterized in that: The reset mechanism includes a reset rod (21) installed on the inner wall of the top side of the fixed box (12). A reset groove is formed at the top of the large gear (22). The central axes of the reset rod (21), the reset groove, the large gear (22), and the rotating shaft (11) are the same. The bottom end of the reset rod (21) extends into the reset groove. A volute spring (24) is installed on the side of the reset rod (21). One end of the volute spring (24) away from the reset rod (21) is installed on the inner wall of the reset groove. The side of the reset rod (21) is connected to the sliding mechanism through a connecting block.

3. The detachable breathing mask for firefighters to meet long-term rescue according to claim 2, characterized in that: The sliding mechanism includes a moving frame (30) installed on the side of the connecting block away from the reset rod (21). Two vertical rods (23) are installed on the top of the moving frame (30). One end of the two vertical rods (23) away from the reset rod (21) is installed with a sliding rod (28). A U-shaped plate (18) is slidably sleeved on the two sliding rods (28). The U-shaped plate (18) includes a horizontal plate and two vertical plates. The top ends of the two vertical plates are respectively installed on the two side parts of the horizontal plate. The horizontal plate is slidably sleeved on the two sliding rods (28). Connecting springs (29) are sleeved on the two sliding rods (28). One end of the two connecting springs (29) is installed on the side of the U-shaped plate (18). The other ends of the two connecting springs (29) are respectively installed on the sides of the two vertical rods (23). The driving mechanism is installed on the bottom of the horizontal plate. The alarm triggering mechanism is installed on the side of the moving frame (30). Oblique grooves (27) are formed on the sides of the two vertical plates away from each other. The two oblique grooves (27) are respectively installed in cooperation with the two pressing mechanisms.

4. The detachable breathing mask for firefighters to meet long-term rescue according to claim 3, characterized in that: The driving mechanism includes a motor (19) installed on the bottom of the horizontal plate. A small gear (20) is installed on the output shaft of the motor (19). The small gear (20) meshes with the large gear (22). The number of teeth of the large gear (22) is a multiple of four. The circumference of the small gear (20) is one-half of that of the large gear (22). A cam (36) is fixedly sleeved on the output shaft of the small gear (20). The pressing end of the cam (36) is away from the reset rod (21). The position of the cam (36) corresponds to that of the alarm triggering mechanism.

5. The detachable breathing mask for firefighters to meet long-term rescue according to claim 4, characterized in that: The alarm trigger mechanism includes round holes formed in the side of the moving frame (30) away from the reset rod (21). A return rod (31) is slidably installed in each of the two round holes. One end of each of the two return rods (31) close to the reset rod (21) is provided with a pressing plate (32). A first conductive block (34) and a second conductive block (35) are respectively installed on the side portions of the pressing plate (32) and the moving frame (30) close to each other. The first conductive block (34) and the second conductive block (35) are correspondingly positioned and have a gap therebetween. Fixed springs (33) are sleeved on the two return rods (31). Two ends of the two fixed springs (33) are respectively installed on the side portions of the moving frame (30) and the pressing plate (32) close to each other. The pressing plate (32) corresponds to the position of the cam (36). The first conductive block (34), the second conductive block (35) are connected to the alarm (14).

6. The detachable breathing mask for firefighters to meet long-term rescue according to claim 3, characterized in that: The pressing mechanism includes an L-shaped pressing rod (25) installed on the side of the mounting post (16). A pressing column (40) is installed on the side of the L-shaped pressing rod (25) close to the U-shaped plate (18). One end of the pressing column (40) away from the L-shaped pressing rod (25) extends into the inclined slot (27).

7. The detachable breathing mask for firefighters to meet long-term rescue according to claim 3, characterized in that: The fixing mechanism includes a mounting block (37) installed on the top of the connecting pipe (2). A fixing hole is formed in the side of the mounting block (37). An L-shaped clamping rod (38) is slidably installed in the fixing hole. Two clamping slots (26) are formed in the side of the mounting post (16). One end of the L-shaped clamping rod (38) extends into the lower clamping slot (26). A reset spring is installed on the side of the L-shaped clamping rod (38). Two ends of the reset spring are respectively installed on the side portions of the mounting block (37) and the L-shaped clamping rod (38) close to each other.

8. The detachable breathing mask for firefighters to meet long-term rescue according to claim 7, characterized in that: The distance between the bottom inner wall of the upper clamping slot (26) and the top inner wall of the lower clamping slot (26) is equal to the length of the inclined slot (27) along the central axis direction of the reset rod (21). The length of the inclined slot (27) along the central axis direction of the reset rod (21) is greater than the length between the top inner wall of the detection hole and the inner wall of the connecting pipe (2).

9. The detachable breathing mask for firefighters to meet long-term rescue according to claim 5, characterized in that: The length of the inclined slot (27) along the central axis direction of the sliding rod (28) is equal to the distance between the pressing end of the cam (36) and the side portion of the pressing plate (32) away from the return rod (31) plus the distance between the side portions of the second conductive block (35) and the first conductive block (34) close to each other.

10. A detachable breathing mask for firefighters to meet long-term rescue requirements, characterized in that: Through holes are formed in the side of the fixing box (12) close to the mounting post (16). One ends of the two L-shaped pressing rods (25) penetrate through the through holes.

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