An electromagnetic lock mechanism for an aircraft oxygen mask door assembly

Abstract

An electromagnetic lock mechanism for an aircraft oxygen mask door assembly, when the electromagnetic lock drives the lock core to move to the innermost end, the hook head hooks the lock hook of the lock on the aircraft oxygen mask door to achieve locking, and when the electromagnetic lock drives the lock core to move to the outermost end, the hook head is away from the lock hook, and the aircraft oxygen mask door can be flipped downward to provide oxygen for passengers. When the electromagnetic lock is not powered on, the rotating rod is rotated by inserting the pin top column actuating rod part, and the driving rod pushes the lock core to move outward during the rotation process, and the hook head can also be away from the lock hook. At this time, the aircraft oxygen mask door can be flipped downward to achieve a manual control function, which can ensure the opening of the aircraft oxygen mask door in a powerless state, and can also facilitate maintenance personnel to perform inspections and maintenance.

Description

Technical Field

[0001] The invention relates to the field of aircraft oxygen systems, and in particular to an electromagnetic lock mechanism for an aircraft oxygen mask door assembly. Background Art

[0002] The cabin pressurization of modern aircraft must maintain the cabin altitude between 8000 and 15000ft (about 2500-4500m). When an accidental decompression occurs, there must be an oxygen system to ensure the safety of the crew, flight attendants and passengers. For the passenger oxygen system, this system is actually composed of several independent oxygen supply components, each of which mainly includes a chemical oxygen generator, an oxygen mask and related pipelines. Generally, aircraft are designed with independent oxygen mask storage boxes and oxygen mask door assemblies to store passenger oxygen masks. When the pressurization fails and the cabin altitude reaches 14000ft, or through the override switch in the cockpit, the oxygen mask door assembly can be opened, and under the action of gravity, the oxygen mask can automatically fall to provide oxygen for passengers. However, the existing oxygen mask door assembly can only be unlocked by powering on, and cannot be released and restored manually. When an emergency occurs, there are risks and it is inconvenient for maintenance personnel to check and maintain. Summary of the invention

[0003] In order to overcome the deficiencies of the above technologies, the present invention provides an electromagnetic lock mechanism for an aircraft oxygen mask door assembly which can be unlocked by power on and manually.

[0004] The technical solution adopted by the present invention to overcome the technical problems is:

[0005] An electromagnetic lock mechanism for an aircraft oxygen mask door assembly, comprising:

[0006] An electromagnetic lock is installed on the oxygen mask storage box housing, a lock core is slidably installed in the electromagnetic lock along the horizontal direction, and the electromagnetic lock drives the lock core to move left and right along the horizontal direction, and a hook head is bent at the head end of the lock core;

[0007] A lock is installed on the aircraft mask door, wherein a lock hook is provided at the head end of the lock, and when the electromagnetic lock drives the lock core to move to the innermost end, the hook head is hooked on the lock hook;

[0008] A rotating rod is located above the electromagnetic lock. The rotating rod is rotatably installed in the oxygen mask storage box housing through a rotating shaft. An actuating rod is vertically arranged below the right end of the rotating rod. The actuating rod is located at the right section of the lock core. A driving rod is vertically arranged below the left end of the rotating rod. The driving rod is located at the left end of the lock core. When the rotating rod rotates, the lock core is driven to move horizontally through the actuating rod and the driving rod.

[0009] In order to realize the one-way action of the electromagnetic lock when it is powered on, it also includes a spring mounted on the lock core, a flange is coaxially arranged on the lock core, one end of the spring is connected to the flange, and the other end is connected to the electromagnetic lock. When the spring is in a free state, the hook head is hooked on the lock hook.

[0010] In order to prevent damage to the lock core, a rubber pad I is provided at the inner end of the driving rod, and a rubber pad II is provided at the inner end of the actuating rod.

[0011] The beneficial effects of the present invention are as follows: when the electromagnetic lock drives the lock core to move to the innermost end, the hook head hooks the lock hook of the lock on the aircraft oxygen mask door to achieve locking, and when the electromagnetic lock drives the lock core to move to the outermost end, the hook head is away from the lock hook, and the aircraft oxygen mask door can be flipped downward to provide oxygen for passengers. When the electromagnetic lock is not powered on, the pin shaft is inserted to support the actuating rod to rotate the rotating rod, and the lock core is pushed to move outward during the rotation of the driving rod. At this time, the hook head can also be away from the lock hook, and the aircraft oxygen mask door can be flipped downward to achieve manual control function, which can ensure the opening of the aircraft oxygen mask door in the power-off state, and can also facilitate maintenance personnel to perform inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0013] In the figure, 1. oxygen mask storage box housing 2. rotating shaft 3. rotating rod 4. actuating rod 5. driving rod 6. lock 7. rubber pad I 8. electromagnetic lock 9. flange 10. spring 11. lock hook 12. hook head 13. rubber pad II 14. lock core 15. pin shaft. DETAILED DESCRIPTION

[0014] The following is combined with Figure 1 The present invention is further described.

[0015] The invention discloses an electromagnetic lock mechanism for an oxygen mask door assembly of an aircraft, comprising: an electromagnetic lock 8, which is installed on an oxygen mask storage box housing 1, wherein a lock core 14 is slidably installed in the electromagnetic lock 8 along a horizontal direction, the electromagnetic lock 8 drives the lock core 14 to move left and right along a horizontal direction, and a hook head 12 is bent at the head end of the lock core 14; a lock 6, which is installed on the aircraft mask door, and a lock hook 11 is provided at the head end of the lock 6, and when the electromagnetic lock 8 drives the lock core 14 to move to the innermost end, the hook head 12 is hooked on the lock hook 11; a rotating rod 3, which is located above the electromagnetic lock 8, and the rotating rod 3 is rotatably installed in the oxygen mask storage box housing 1 through a rotating shaft 2, an actuating rod 4 is vertically arranged below the right end of the rotating rod 3, and the actuating rod 4 is located at the right section of the lock core 14, and a driving rod 5 is vertically arranged below the left end of the rotating rod 3, and the driving rod 5 is located at the left end of the lock core 14, and when the rotating rod 3 rotates, the lock core 14 is driven to move horizontally through the actuating rod 4 and the driving rod 5. When the electromagnetic lock 8 drives the lock core 14 to move to the innermost end, the hook head 12 hooks the lock hook 11 of the lock 6 on the aircraft oxygen mask door to achieve locking. When the electromagnetic lock 8 drives the lock core 14 to move to the outermost end, the hook head 12 is away from the lock hook 11. At this time, the aircraft oxygen mask door can be flipped downward to provide oxygen for passengers. When the electromagnetic lock 8 is not powered on, the pin 15 is inserted to support the part of the actuating rod 4 to rotate the rotating rod 3. At this time, the driving rod 5 pushes the lock core 14 to move outward during the rotation process. At this time, the hook head 12 can also be away from the lock hook 11. At this time, the aircraft oxygen mask door can be flipped downward to achieve the manual control function, which can ensure the opening of the aircraft oxygen mask door in the power-off state, and it can also be convenient for maintenance personnel to perform inspection and maintenance.

[0016] Furthermore, it also includes a spring 10 mounted on the lock core 14, a flange 9 is coaxially arranged on the lock core 14, one end of the spring 10 is connected to the flange 9, and the other end is connected to the electromagnetic lock 8. When the spring 10 is in a free state, the hook head 12 is hooked on the lock hook 11. When the electromagnetic lock 8 is not powered, the spring 10 drives the hook head 12 to hook on the lock hook 11 to lock the aircraft oxygen mask door. When unlocking, the electromagnetic lock 8 drives the lock core 14 to move outward and stretch the spring 10 after being powered. At this time, the hook head 12 is away from the lock hook 11 to unlock the aircraft oxygen mask door. By setting the spring 10, the electromagnetic lock 8 can be powered in one direction. When locked, the elastic force of the spring 10 is used to achieve a normally closed state.

[0017] Preferably, the inner end of the driving rod 5 is provided with a rubber pad Ⅰ 7, and the inner end of the actuating rod 4 is provided with a rubber pad Ⅱ 13. By providing the rubber pad Ⅰ 7 and the rubber pad Ⅱ 13, a buffer can be provided when the driving rod 5 contacts the lock core 14 and the actuating rod 4 contacts the lock core 14, thereby preventing damage to the lock core 14.

Claims

1. An electromagnetic lock mechanism for an aircraft oxygen mask door assembly, characterized in that: include: An electromagnetic lock is installed on the oxygen mask storage box housing, a lock core is slidably installed in the electromagnetic lock along the horizontal direction, and the electromagnetic lock drives the lock core to move left and right along the horizontal direction, and a hook head is bent at the head end of the lock core; A lock is installed on the aircraft mask door, wherein a lock hook is provided at the head end of the lock, and when the electromagnetic lock drives the lock core to move to the innermost end, the hook head is hooked on the lock hook; A rotating rod is located above the electromagnetic lock. The rotating rod is rotatably installed in the oxygen mask storage box housing through a rotating shaft. An actuating rod is vertically arranged below the right end of the rotating rod. The actuating rod is located at the right section of the lock core. A driving rod is vertically arranged below the left end of the rotating rod. The driving rod is located at the left end of the lock core. When the rotating rod rotates, the lock core is driven to move horizontally through the actuating rod and the driving rod. It also includes a spring mounted on the lock core, wherein a flange is coaxially arranged on the lock core, one end of the spring is connected to the flange, and the other end of the spring is connected to the electromagnetic lock, and when the spring is in a free state, the hook head is hooked on the lock hook; The inner end of the driving rod is provided with a rubber pad I, and the inner end of the actuating rod is provided with a rubber pad II; It also includes a pin shaft. When the electromagnetic lock is not powered on, the pin shaft is inserted to support the actuating rod to rotate the rotating rod. During the rotation of the driving rod, the lock core is pushed to move outward to achieve the hook head away from the lock hook. At this time, the aircraft oxygen mask door can be flipped downward to realize the manual control function.

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