Oxygen mask PSU panel lock with stable locking function

Abstract

The invention discloses an oxygen mask PSU panel lock with a stable locking function, and relates to the technical field of PSU panel locks. The oxygen mask comprises an oxygen mask box body, a PSU baffle is movably installed at the bottom of the oxygen mask box body through a hinge, a first through hole penetrates through the surface of the PSU baffle, a base is fixed to the outer wall of the oxygen mask box body, a rotating shaft is rotationally arranged on the base, an armature is fixed to the rotating shaft, and a supporting shaft is rotationally arranged on one side in the base; a ratchet mechanism is arranged between the supporting shaft and the armature, a sliding groove is formed in the front side of the interior of the base, a gear mechanism is arranged between the sliding groove and the supporting shaft, a buckle structure is arranged at the bottom of the gear mechanism and matched with the first through hole, a bistable electromagnet is arranged on one side of the base and matched with the armature, and limiting locking and releasing opening of the PSU baffle are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of PSU panel locks, and in particular relates to an oxygen mask PSU panel lock with a stable locking function. Background Art

[0002] In order to supply oxygen to the passengers of the aircraft (for example, when there is a sudden depressurization in the cabin), an oxygen mask is installed above each seat. Normally, the passenger oxygen mask is stored inside the PSU panel. When the passenger oxygen system is working, the PSU panel lock mechanism is energized and unlocked, and the mask is released under the action of its own gravity. It can also be opened manually with the help of external objects.

[0003] The traditional PSU panel lock adopts a steel ball-spring locking mechanism. When working, due to the action of magnetic force, the spring is compressed, the three built-in steel balls are limited by force, and the device is locked.

[0004] In actual application, the following problems exist:

[0005] 1. The inertia force of the steel ball itself may cause the position of the steel ball to be unrestricted or to slip, resulting in the steel ball being unable to lock the steel needle and unable to achieve stable locking;

[0006] 2. When the acceleration loading direction is upward, due to the upward inertial force, the steel ball will move upward, causing the original compression of the spring to increase, thereby increasing the counterclockwise torque, and the lock is prone to abnormal opening, causing the PSU panel to fall off abnormally.

[0007] To this end, we designed an oxygen mask PSU panel lock with a stable locking function to solve the above problems. Summary of the invention

[0008] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0009] The present invention discloses an oxygen mask PSU panel lock with a stable locking function, comprising an oxygen mask box body, a PSU baffle being movably installed on the bottom of the oxygen mask box body through a hinge, a first through hole being penetrated through the surface of the PSU baffle, a base being fixed to the outer wall of the oxygen mask box body, a rotating shaft being rotatably arranged on the base, an armature being fixed on the rotating shaft, a support shaft being rotatably arranged on one side of the base, a ratchet mechanism being arranged between the support shaft and the armature, a slide groove being opened on the front side of the base, a gear mechanism being arranged between the slide groove and the support shaft, a buckle structure being arranged at the bottom of the gear mechanism and cooperating with the first through hole.

[0010] The gear mechanism includes a rack, which is movably arranged inside a slide groove, a first gear is arranged on the front side of the support shaft surface, the first gear is meshed with the rack, a rotating rod is arranged on one side of the rack, the rotating rod is rotatably connected to the base, a second gear is arranged on the rotating rod, the second gear is arranged on the lower side of the first gear, and the second gear is meshed with the rack.

[0011] The buckle structure includes a limited seat, which is fixed on the top of the rack and is an L-shaped structure. The transverse part of the limited seat cooperates with the base, a fixed block is fixed on the base, a first spring is connected between the top of the limited seat and the fixed block, a strip plate is fixed to the bottom of the rack, and a connecting block is fixed to the bottom of the strip plate through a connecting rod, two fixed plates are relatively fixed on one side of the connecting block, a connecting plate is rotatably arranged between the two fixed plates, a card plate is fixed to the movable end of the connecting plate, a second spring is connected between the card plate and the connecting block, and the card plate and the connecting block both cooperate with the first through hole, and two connecting ropes are fixed between the rotating rod and the card plate.

[0012] A bistable electromagnet is arranged on a side of the first gear away from the rack. The bistable electromagnet is mounted on a base, and the bistable electromagnet cooperates with the armature.

[0013] The ratchet mechanism includes a pawl and a ratchet, the pawl is welded and fixed on the inner side of the armature, the ratchet is arranged on the rear side of the first gear, and the ratchet is sleeved on the support shaft, the pawl and the ratchet cooperate with each other, two slots are provided on the support shaft, and spring retaining rings are provided in the slots, and the two spring retaining rings respectively cooperate with the first gear and the front surface of the ratchet.

[0014] A spring sleeve is arranged on one side of the bistable electromagnet, a third spring is arranged inside the spring sleeve, and the upper end of the third spring cooperates with the armature.

[0015] Two pulleys are arranged on the front and rear surfaces of the strip plate, the connecting rope passes through two adjacent pulleys, and the pulleys are rotatably connected to the strip plate.

[0016] A second through hole is passed through the PSU baffle, a circular groove is formed at the bottom of the movable end of the armature, and the second through hole and the circular groove cooperate with each other.

[0017] A telescopic rod is arranged inside the first spring, and the upper and lower ends of the telescopic rod are fixedly connected to the limit seat and the fixing block respectively.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention facilitates squeezing the movable end of the card plate in a direction away from the connecting block through the elastic action of the second spring and the rotational cooperation between the connecting plate and the fixed plate, so that the movable end of the card plate abuts against the bottom of the PSU baffle, limits the position of the PSU baffle, and puts the PSU baffle in a closed state. At the same time, combined with the meshing action of the first gear and the rack, and the mutual cooperation of the pawl and the ratchet, the rack is effectively limited and clamped to avoid the free fall of the rack due to gravity, so that the bottom card plate is stabilized on the lower side of the PSU baffle, ensuring that the PSU baffle is stably maintained in a locked and closed state, and effectively preventing the PSU baffle from automatically falling off. The phenomenon is solved. During the use of the traditional PSU panel lock, the inertia force of the steel ball itself may cause the position of the steel ball to be unrestricted or slip, resulting in the steel ball being unable to lock the steel needle and failing to achieve stable locking. At the same time, it solves the problem that when the traditional PSU panel lock encounters an upward acceleration loading direction of the aircraft, due to the upward inertia force, the steel ball will move upward, making the original compression of the spring larger, thereby increasing the counterclockwise torque, and the lock buckle is prone to abnormal opening, resulting in abnormal detachment of the PSU panel. It effectively prevents the PSU panel lock from loosening when the aircraft encounters severe turbulence during flight, and ensures the stability of the locked state of the PSU panel lock;

[0020] 2. The present invention facilitates to drive the pawl to disengage from the ratchet wheel through the mutual cooperation between the bistable electromagnet and the armature, so that the ratchet wheel and the first gear are no longer restricted and can rotate freely, thereby eliminating the limit on the rack and moving downward under the action of gravity. Combined with the meshing action of the rack and the second gear, the second gear is driven to rotate, and then the rotating rod is driven to rotate synchronously, so as to achieve the purpose of winding the connecting rope, and then the card plate is driven to rotate and disengage from the PSU baffle, so as to achieve the effect of releasing and opening the PSU baffle. In addition, the mutual cooperation between the second through hole and the circular groove can achieve the purpose of manually opening the PSU baffle, adapt to different usage conditions, and ensure the use effect of the PSU panel lock;

[0021] 3. The present invention adopts a combination of the rotational movement of the card plate and the vertical movement of the rack as a whole, and no longer designs a separate lock structure, so that the entire device has a compact structure, is easy to install, is light in weight, and has stronger stability. It can effectively eliminate the impact of vibration during the flight of the aircraft on the PSU panel lock. At the same time, the bistable electromagnet has a stable magnetic attraction when the power is off, which can keep the PSU baffle stable in a locked and closed state without energy consumption. The device as a whole adopts a more common mechanical structure, without special materials, and can overcome more extreme working conditions.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a locked state of a PSU panel lock of an oxygen mask with a stable locking function according to the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 3 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 4 for Figure 1 A top view of

[0028] Figure 5 for Figure 4 Schematic diagram of the structure of CC in the middle section;

[0029] Figure 6 for Figure 4 Schematic diagram of the structure of DD in the middle section;

[0030] Figure 7 for Figure 5 Schematic diagram of the enlarged structure at E in the middle;

[0031] Figure 8 for Figure 6 The enlarged structural diagram at F in the middle;

[0032] Fig. 9 for Figure 1 A schematic diagram of the structure from another perspective;

[0033] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure at G in the middle;

[0034] Fig.11 for Figure 1 Schematic diagram of the bottom structure;

[0035] Fig.12 for Fig.11 Schematic diagram of the enlarged structure at H in the middle;

[0036] Fig.13 It is a structural schematic diagram of the spring retaining ring and the support shaft in the present invention in a separated state;

[0037] Fig.14 It is a structural schematic diagram of an oxygen mask PSU panel lock with a stable locking function in an open state according to the present invention;

[0038] Fig.15 for Fig.14 A schematic diagram of the enlarged structure at position I in the middle;

[0039] Fig.16 for Fig.14 Schematic diagram of the enlarged structure at J in the middle;

[0040] Fig.17 for Fig.14 The main view;

[0041] Fig.18 for Fig.17 Schematic diagram of the enlarged structure at K in the middle.

[0042] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0043] 1. Oxygen mask box body; 2. PSU baffle; 3. First through hole; 4. Second through hole; 5. Base; 6. Armature; 7. Ratchet; 8. Rotating shaft; 9. First spring; 10. Limit seat; 11. Rack; 12. Strip plate; 13. Connecting block; 14. Clamping plate; 15. Second spring; 16. Fixed plate; 17. Connecting plate; 18. Connecting rope; 19. Bistable electromagnet; 20. First gear; 21. Ratchet; 22. Support shaft; 23. Spring retaining ring; 24. Third spring; 25. Second gear; 26. Rotating rod; 27. Slide; 28. Spring sleeve; 29. ​​Clamping slot; 30. Circular groove; 31. Pulley; 32. Fixed block. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0045] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0046] See also Figure 1-Figure 18As shown, the present invention is an oxygen mask PSU panel lock with a stable locking function, comprising an oxygen mask box body 1, a PSU baffle 2 is movably installed on the bottom of the oxygen mask box body 1 through a hinge, a first through hole 3 is penetrated through the surface of the PSU baffle 2, a base 5 is fixed to the outer wall of the oxygen mask box body 1, a rotating shaft 8 is rotatably arranged on the base 5, an armature 6 is fixed on the rotating shaft 8, a support shaft 22 is rotatably arranged on one side of the base 5, a ratchet mechanism is arranged between the support shaft 22 and the armature 6, a slide groove 27 is opened on the front side of the base 5, a gear mechanism is arranged between the slide groove 27 and the support shaft 22, and a buckle structure is arranged at the bottom of the gear mechanism, which cooperates with the first through hole 3.

[0047] The gear mechanism includes a rack 11, which is movably arranged inside a slide groove 27. A first gear 20 is arranged on the front side of the surface of the support shaft 22, and the first gear 20 is meshed with the rack 11. A rotating rod 26 is arranged on one side of the rack 11, and the rotating rod 26 is rotatably connected to the base 5. A second gear 25 is arranged on the rotating rod 26, and the second gear 25 is arranged on the lower side of the first gear 20, and the second gear 25 is meshed with the rack 11.

[0048] The buckle structure includes a limit seat 10, which is fixed on the top of the rack 11, and the limit seat 10 is an L-shaped structure. The transverse part of the limit seat 10 cooperates with the base 5 to effectively limit the downward movement distance of the rack 11 and prevent the rack 11 from sliding out of the slide groove 27. A fixing block 32 is fixed on the base 5, and a first spring 9 is connected between the top of the limit seat 10 and the fixing block 32. A strip plate 12 is fixed to the bottom of the rack 11, and a connecting block 13 is fixed to the bottom of the strip plate 12 through a connecting rod. Two fixing plates 16 are relatively fixed on one side of the connecting block 13, and a connecting plate 17 is rotatably arranged between the two fixing plates 16. A card plate 14 is fixed to the movable end of the connecting plate 17, and a second spring 15 is connected between the card plate 14 and the connecting block 13, and the card plate 14 and the connecting block 13 both cooperate with the first through hole 3, and two connecting ropes 18 are fixed between the rotating rod 26 and the card plate 14.

[0049] In the above structure, the meshing action of the rack 11 and the second gear 25 drives the second gear 25 to rotate, and then drives the rotating rod 26 to rotate synchronously, thereby achieving the purpose of winding and releasing the connecting rope 18. Combined with the rotation coordination of the connecting plate 17 and the fixed plate 16, the clamping plate 14 is driven to move, thereby achieving the effect of limiting and fixing the PSU baffle 2 and releasing it.

[0050] A bistable electromagnet 19 is disposed on a side of the first gear 20 away from the rack 11 . The bistable electromagnet 19 is mounted on the base 5 , and the bistable electromagnet 19 cooperates with the armature 6 .

[0051] The ratchet mechanism includes a pawl 7 and a ratchet 21. The pawl 7 is welded and fixed to the inner side of the armature 6. The ratchet 21 is arranged on the rear side of the first gear 20, and the ratchet 21 is sleeved on the support shaft 22. The pawl 7 and the ratchet 21 cooperate with each other. Two slots 29 are provided on the support shaft 22. A spring retaining ring 23 is provided in the slot 29. The two spring retaining rings 23 cooperate with the first gear 20 and the front surface of the ratchet 21 respectively.

[0052] A spring sleeve 28 is provided on one side of the bistable electromagnet 19 , a third spring 24 is provided inside the spring sleeve 28 , and the upper end of the third spring 24 cooperates with the armature 6 .

[0053] Two pulleys 31 are provided on the front and rear surfaces of the strip plate 12. The connecting rope 18 passes through two adjacent pulleys 31. The pulley 31 is rotationally connected to the strip plate 12. The pulley 31 effectively limits and guides the connecting rope 18, thereby ensuring the use effect of the connecting rope 18 and the stability of the winding and releasing process of the connecting rope 18.

[0054] A second through hole 4 is penetrated through the PSU baffle 2, and a circular groove 30 is provided at the bottom of the movable end of the armature 6. The second through hole 4 and the circular groove 30 cooperate with each other. Through the second through hole 4, it is convenient for the staff to use a sharp object to squeeze the circular groove 30, push the armature 6 upward, and manually open the oxygen mask PSU panel lock.

[0055] A telescopic rod is arranged inside the first spring 9 , and the upper and lower ends of the telescopic rod are fixedly connected to the limit seat 10 and the fixing block 32 respectively, thereby ensuring the stability and use effect of the first spring 9 .

[0056] Example:

[0057] like Figure 1-Figure 12 As shown, in the initial state, the PSU baffle 2 is in a locked closed position, at which time the bistable electromagnet 19 is not energized, the armature 6 is stabilized at the end position of the bistable electromagnet 19, and the second through hole 4 and the circular groove 30 are on the same axis.

[0058] like Figure 14-18 As shown, when the oxygen mask needs to be used, the bistable electromagnet 19 is energized through the external control terminal to release the armature 6. Under the elastic force of the third spring 24, the right part of the armature 6 is pushed upward, and combined with the action of the rotating shaft 8, the armature 6 rotates around the rotating shaft 8, thereby driving the pawl 7 to disengage from the ratchet 21. At this time, the ratchet 21 is no longer restricted, and the first gear 20 is no longer restricted and can rotate freely. Under the meshing action of the first gear 20 and the rack 11, the limit on the rack 11 is eliminated;

[0059] At this time, the rack 11 moves downward along the direction of the slide slot 27 under the action of its own weight and the elastic force of the first spring 9 on its top, driving the second gear 25 on the lower side to rotate counterclockwise, thereby driving the rotating rod 26 to rotate synchronously, and in combination with the pulley 31, the connecting rope 18 is stably reeled up, and under the rotation cooperation of the connecting plate 17 and the fixing plate 16, the card plate 14 is pulled to rotate in the direction close to the connecting block 13, and the second spring 15 is compressed until the movable end of the card plate 14 is separated from the bottom surface of the PSU baffle 2, thereby releasing the limit on the PSU baffle 2, and in combination with the first through hole 3, the hinge action between the PSU baffle 2 and the oxygen mask box body 1, the weight of the PSU baffle 2 itself, and the weight of the oxygen mask inside the oxygen mask box body 1, the PSU baffle 2 is opened downward, and the internal oxygen mask falls downward, which is convenient for passengers to use;

[0060] When the rack 11 moves downward, the buckle structure is driven to move downward synchronously, so that the PSU baffle 2 is released at a certain angle. When the card plate 14 is pulled to rotate in the direction of the connecting block 13, the PSU baffle 2 can be lifted up at a certain angle, which facilitates the opening of the PSU baffle 2.

[0061] The staff or passengers can use a sharp object to pass through the second through hole 4, squeeze the circular groove 30, and push the armature 6 upward to achieve the purpose of manually opening the oxygen mask PSU panel lock, which is suitable for different usage situations.

[0062] After use, the staff puts the oxygen mask back into the oxygen mask box body 1, and pushes the PSU baffle 2 and the rack 11 upwards, driving the buckle structure to pass through the first through hole 3, and under the elastic action of the second spring 15, the movable end of the clamping plate 14 is squeezed outwards until the movable end of the clamping plate 14 abuts against the bottom of the PSU baffle 2, thereby limiting the PSU baffle 2;

[0063] Secondly, the power to the bistable electromagnet 19 is cut off, the armature 6 returns to its initial position and stabilizes at the end position of the bistable electromagnet 19, the third spring 24 is compressed into the spring sleeve 28 by the armature 6, and the pawl 7 is driven to engage in the ratchet groove corresponding to the ratchet 21, the ratchet 21 is limited by the pawl 7 to prevent the support shaft 22 from rotating freely, thereby achieving the purpose of limiting the first gear 20, the rack 11 and the second gear 25, achieving the purpose of restoring to the initial state, ensuring the stability of the card plate 14, and achieving the purpose of limiting and locking the PSU baffle 2.

[0064] Compared with the traditional PSU panel lock, the present invention realizes the locking, fixing and opening of the PSU baffle 2 through the mutual cooperation of the ratchet mechanism, the gear mechanism and the snap structure. The ratchet mechanism has the functions of anti-reversal and intermittent movement, which can well ensure that the PSU panel lock will not loosen. The operation is simple, and it can overcome the strong turbulence during the flight. It is safe, stable, energy-saving and environmentally friendly, and is more suitable for the current aviation market needs.

[0065] It should be further explained that the installation structure, connection method or setting method of each component in the present invention are all common mechanical methods, and they can be implemented as long as they can achieve their beneficial effects.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An oxygen mask PSU panel lock with a stable locking function, comprising an oxygen mask box body (1), a PSU baffle (2) being movably mounted on the bottom of the oxygen mask box body (1) via a hinge, characterized in that: The surface of the PSU baffle (2) is penetrated by a first through hole (3); the outer wall of the oxygen mask box body (1) is fixed with a base (5); a rotating shaft (8) is rotatably arranged on the base (5); an armature (6) is fixed on the rotating shaft (8); a support shaft (22) is rotatably arranged on one side of the base (5); a ratchet mechanism is arranged between the support shaft (22) and the armature (6); a slide groove (27) is opened on the front side of the base (5); a gear mechanism is arranged between the slide groove (27) and the support shaft (22); a buckle structure is arranged at the bottom of the gear mechanism, which cooperates with the first through hole (3).

2. An oxygen mask PSU panel lock with stable locking function according to claim 1, characterized in that: The gear mechanism comprises a rack (11), the rack (11) is movably arranged inside a slide groove (27), a first gear (20) is arranged on the front side of the surface of the support shaft (22), the first gear (20) is meshed with the rack (11), a rotating rod (26) is arranged on one side of the rack (11), the rotating rod (26) is rotatably connected to the base (5), a second gear (25) is arranged on the rotating rod (26), the second gear (25) is arranged on the lower side of the first gear (20), and the second gear (25) is meshed with the rack (11).

3. An oxygen mask PSU panel lock with stable locking function according to claim 2, characterized in that: The buckle structure comprises a limit seat (10), the limit seat (10) is fixed on the top of the rack (11), and the limit seat (10) is an L-shaped structure, the transverse part of the limit seat (10) cooperates with the base (5), a fixing block (32) is fixed on the base (5), a first spring (9) is connected between the top of the limit seat (10) and the fixing block (32), a strip plate (12) is fixed on the bottom of the rack (11), and a connecting block is fixed to the bottom of the strip plate (12) through a connecting rod (13), two fixed plates (16) are relatively fixed on one side of the connecting block (13), a connecting plate (17) is rotatably arranged between the two fixed plates (16), a clamping plate (14) is fixed to the movable end of the connecting plate (17), a second spring (15) is connected between the clamping plate (14) and the connecting block (13), and the clamping plate (14) and the connecting block (13) are both matched with the first through hole (3), and two connecting ropes (18) are fixed between the rotating rod (26) and the clamping plate (14).

4. The oxygen mask PSU panel lock with stable locking function according to claim 3, characterized in that: A bistable electromagnet (19) is provided on a side of the first gear (20) away from the rack (11); the bistable electromagnet (19) is mounted on a base (5), and the bistable electromagnet (19) cooperates with an armature (6).

5. An oxygen mask PSU panel lock with stable locking function according to claim 4, characterized in that: The ratchet mechanism comprises a ratchet pawl (7) and a ratchet wheel (21), wherein the ratchet pawl (7) is welded and fixed on the inner side of the armature (6), the ratchet wheel (21) is arranged on the rear side of the first gear (20), and the ratchet wheel (21) is sleeved on the support shaft (22), the ratchet pawl (7) and the ratchet wheel (21) cooperate with each other, and the support shaft (22) is provided with two slots (29), and a spring retaining ring (23) is arranged in the slot (29), and the two spring retaining rings (23) respectively cooperate with the first gear (20) and the front side surface of the ratchet wheel (21).

6. An oxygen mask PSU panel lock with stable locking function according to claim 5, characterized in that: A spring sleeve (28) is arranged on one side of the bistable electromagnet (19), a third spring (24) is arranged inside the spring sleeve (28), and the upper end of the third spring (24) is matched with the armature (6).

7. An oxygen mask PSU panel lock with stable locking function according to claim 6, characterized in that: Two pulleys (31) are arranged on the front and rear surfaces of the strip plate (12), the connecting rope (18) passes through two adjacent pulleys (31), and the pulleys (31) are rotatably connected to the strip plate (12).

8. An oxygen mask PSU panel lock with stable locking function according to claim 7, characterized in that: The PSU baffle (2) is penetrated by a second through hole (4), the bottom of the movable end of the armature (6) is provided with a circular groove (30), and the second through hole (4) and the circular groove (30) cooperate with each other.

9. An oxygen mask PSU panel lock with stable locking function according to claim 8, characterized in that: A telescopic rod is arranged inside the first spring (9), and the upper and lower ends of the telescopic rod are respectively fixedly connected to the limit seat (10) and the fixed block (32).

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