Electromagnetic plunger latch for aircraft interior decoration

Abstract

The utility model discloses an electromagnetic plunger latch for aircraft interiors, and belongs to the technical field of composite material functional structure manufacturing. The plunger latch rocker arm is rotationally installed in the shell, one end of the panel lock catch can extend into the shell in a sliding mode and is locked by the lower end of the plunger latch rocker arm, the electromagnet is installed in the shell, the adsorption end of the electromagnet is arranged close to the upper end of the plunger latch rocker arm, and the lower end of the plunger latch rocker arm is branched to form a manual switch part which can rotate downwards to penetrate out of the shell. The manual switch part is arranged below the same side of the electromagnet, and two torsion spring arms of the torsion spring are connected to the upper end of the plunger latch rocker arm and the lower end of the shell respectively. According to the utility model, the structure and function integrated design scheme is adopted, the structure is small, the space utilization rate is high, and the weight is light. The strict requirements of aerospace, rail transit and other fields for the size and weight of products are met. The automatic small door release device is high in manufacturing efficiency, suitable for batch production, low in manufacturing cost, wide in applicability and capable of achieving the functions of automatic small door release, manual tool release and manual closing without an external tool.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material functional structure manufacturing, and in particular relates to an electromagnetic latch for aircraft interior decoration. Background Art

[0002] To ensure flight safety, aircraft interior components such as oxygen unit mask boxes need to have the function of automatic release under specific conditions. At the same time, they are required to maintain intact functions and keep the small door closed and locked under working impact and crash impact to prevent the mask from falling off without instructions. In addition, to facilitate daily maintenance, it is necessary to have the function of manual tool release and manual closure without external tools. To achieve the above functions, electromagnetic latches are often used as important components of the oxygen unit mask boxes on board, which can realize the functions of automatic release of the small door, manual tool release and manual closure without external tools. In addition to meeting functional requirements, it is also necessary to meet DO-160 related material, environment, vibration, sealing, flame retardant, maintainability and other requirements.

[0003] At present, the electromagnetic automatic release and manual tool release functions of commonly used electromagnetic latches are realized by different mechanisms. The latch structure is complex and has poor reliability. Frequent inspection and maintenance are required to ensure the effectiveness of the latch function, which makes it difficult to meet the rapid development and high efficiency needs of the aerospace field. Utility Model Content

[0004] In order to solve the problems that commonly used latches have complex structures, poor reliability and require frequent inspection and maintenance, the utility model provides an electromagnetic latch for aircraft interior with a high degree of integration, which has a simple structure, achieves the advantages of high device reliability and low maintenance cost, etc.

[0005] The technical solution adopted by the utility model is:

[0006] An electromagnetic latch for aircraft interior, comprising a shell, an electromagnet, a latch rocker arm, a torsion spring and a panel lock buckle; the latch rocker arm is rotatably installed in the shell, one end of the panel lock buckle can slide into the shell and be locked by the lower end of the latch rocker arm, the electromagnet is installed in the shell, the adsorption end of the electromagnet is arranged near the upper end of the latch rocker arm, the lower end of the latch rocker arm branches out a manual switch part, the manual switch part can be rotated downward to pass through the shell, the manual switch part, the rotation point of the latch rocker arm and the panel lock buckle are arranged in sequence, the manual switch part is arranged below the same side of the electromagnet, the latch rocker arm and the panel lock buckle are separated from the electromagnet in sequence, and the two torsion spring arms of the torsion spring are respectively connected to the upper end of the latch rocker arm and the lower end of the shell.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] The utility model adopts a structural and functional integrated design scheme, with a compact structure, high space utilization and light weight. It meets the strict requirements of aerospace, rail transportation and other fields on product size and weight. The utility model has high manufacturing efficiency, is suitable for mass production, has low manufacturing cost and wide applicability. The utility model can realize the functions of automatic release of the small door, release with manual tools and manual closing without external tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the locked state of the utility model;

[0010] Figure 2 This is a schematic diagram of the unlocked state of the utility model;

[0011] Figure 3 This is a schematic diagram of the structure of the latch rocker arm of the utility model;

[0012] Figure 4 This is a schematic diagram of the force on the rocker arm of the latch of the utility model;

[0013] Figure 5 It is a schematic diagram of the locking operation of the utility model;

[0014] Figure 6 This is a schematic diagram of the electromagnetic unlocking process of the utility model;

[0015] Figure 7 This is a schematic diagram of manual unlocking of the utility model;

[0016] Figure 8 This is a schematic diagram of the locking of the rocker arm of the latch of the utility model;

[0017] Among them: 1. Shell; 2. Electromagnet; 3. Latch rocker arm; 4. Shell block; 5. Torsion spring; 6. Base; 7. Panel lock; 8. Wire; 31. Manual switch part; 32. Torsion spring interface; 33. Electromagnetic cover; 34. Latch shaft; 35. Lock hook part. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0019] like Figures 1 to 8As shown, an electromagnetic latch for aircraft interior decoration adopts a shell structure to improve the stability and reliability of the overall structure, including a shell 1, an electromagnet 2, a latch rocker arm 3, a torsion spring 5 and a panel lock 7; the latch rocker arm 3 is rotatably installed in the shell 1, one end of the panel lock 7 can slide into the shell 1 and be locked by the lower end of the latch rocker arm 3, the electromagnet 2 is installed in the shell 1, the adsorption end of the electromagnet 2 is arranged near the upper end of the latch rocker arm 3, the lower end of the latch rocker arm 3 branches out a manual switch part 31, the manual switch part 31 can rotate downward and pass through the shell 1, the manual switch part 31, the rotation point of the latch rocker arm 3 and the panel lock 7 are arranged in sequence, the manual switch part 31 is arranged below the same side of the electromagnet 2, the latch rocker arm 3 and the panel lock 7 are separated from the electromagnet 2 in sequence, and the two torsion spring arms of the torsion spring 5 are respectively connected to the upper end of the latch rocker arm 3 and the lower end of the shell 1. A torsion spring interface 32 is arranged at the upper end of the latch rocker arm 3 for connecting the torsion spring arm.

[0020] The lead wire 8 of the electromagnet 2 passes through a through hole provided on the housing 1 .

[0021] like Figure 3 As shown, a lock hook portion 35 is provided at the lower end of the latch rocker arm 3, and a lock shaft is provided at the upper end of the panel lock buckle 7. The latch rocker arm 3 can hook the lock shaft of the panel lock buckle 7 through the lock hook portion 35. The latch rocker arm 3 is rotatably installed in the housing 1 through the latch shaft 34. An electromagnetic cover plate 33 is installed on the latch rocker arm 3, and is magnetically connected to the electromagnet 2 through the electromagnetic cover plate 33.

[0022] The spring coil portion of the torsion spring 5 is coaxially arranged with the latch shaft 34 .

[0023] The electromagnet 2 is installed in the housing 1 through a housing stopper 4 .

[0024] A base 6 is disposed on the bottom surface of the housing 1 .

[0025] The scheme comprehensively considers the relevant civil aircraft design specifications, and the material selection of shell 1 is "polyamide or polycarbonate thermoplastic material".

[0026] The torsion spring 5 is made of 65Mn silicon-manganese spring steel, and the latch shaft 34 is made of stainless steel. They meet the strength requirements for impact and vibration tests; meet the electromagnetic, environmental conditions and life requirements; meet the operating temperature range of -55℃ to 85℃; and meet the lightweight requirements.

[0027] The electromagnetic cover plate 33 is made of magnetic steel or the electromagnetic core is made of magnetic steel.

[0028] Working process:

[0029] When the oxygen mask is opened for maintenance or manually, the oxygen mask assembly can be pushed up to close and lock the mask, without the need for external tools to achieve the manual closing function. When pushing up the oxygen mask, the panel lock 7 of the oxygen mask assembly first contacts the reset structure of the latch rocker arm 3 and pushes the latch rocker arm 3 to rotate in the opposite direction. The thrust offsets the effect of the torsion spring 5. When the electromagnetic cover plate 33 of the latch rocker arm 3 approaches the electromagnet 2, the electromagnetic cover plate 33 is tightly adsorbed together with the electromagnet 2 through magnetic steel adsorption, and a pre-tightening force is formed on the panel lock 7 of the oxygen mask assembly, thereby achieving the locking function of the oxygen mask assembly. The specific implementation process is as follows: Figure 5 :

[0030] Electromagnetic unlocking function: When F electromagnetic ≥ -F magnetic steel, (such as Figure 6 (shown)

[0031] When the electromagnetic latch is locked (normal), if the oxygen mask needs to be opened in special circumstances, the electromagnetic latch receives an unlocking signal (the coil is excited according to the specified parameters), the electromagnet 2 acts to offset the magnetic force of the magnet, and the latch rocker arm 3 rotates clockwise under the action of the torsion spring 5 and the gravity of the oxygen mask assembly, thereby releasing the locked state of the oxygen mask assembly and realizing the unlocking function (such as Figure 6 shown).

[0032] Manual unlocking function: Fmanual×Lmanual>Fmagnetic steel×Lmagnetic steel, Fmanual<35N; (such as Figure 7 (shown)

[0033] During routine inspection and maintenance of the oxygen mask assembly, it is often necessary to manually unlock the oxygen mask assembly. The manual switch portion 31 can be pushed upward manually or with a manual release tool to overcome the torque of the magnetic steel, and the latch rocker arm 3 is pushed to rotate clockwise under the action of the torsion spring 5. The reset structure of the latch pushes the panel lock 7 to pop out of the panel assembly, realizing the manual unlocking function (such as Figure 7 shown).

[0034] Locking function: F magnet × L magnet > F torsion spring × L torsion spring + F panel × L lock (such as Figure 8 (shown)

[0035] When the electromagnetic coil is not excited (normal state), under the action of the magnetic force of the magnetic steel, a magnetic attraction is generated at the electromagnetic cover plate 33 and the iron core. The torque generated by the magnetic steel attraction is greater than the combined torque of the torsion spring 5 torque and the panel structure gravity, so that the lock rocker arm 3 cannot rotate clockwise, and a pre-tightening force is formed on the lock of the panel, thereby realizing the locking function of the panel assembly, keeping the panel assembly normally closed and functioning well, and effectively preventing the mask from falling off without instruction. (such as Figure 8 (shown)

[0036] The automatic electromagnetic latch provided by the present invention is suitable for fields such as aerospace and rail transportation that have high requirements on reliability and use environment, and realizes the functions of automatic release of the small door, release with manual tools, and manual closing without external tools.

[0037] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An electromagnetic latch for aircraft interior, characterized in that: The invention comprises a housing (1), an electromagnet (2), a latch rocker arm (3), a torsion spring (5) and a panel lock buckle (7); the latch rocker arm (3) is rotatably mounted in the housing (1); one end of the panel lock buckle (7) can slide into the housing (1) and be locked by the lower end of the latch rocker arm (3); the electromagnet (2) is mounted in the housing (1); the adsorption end of the electromagnet (2) is arranged close to the upper end of the latch rocker arm (3); the lower end of the latch rocker arm (3) branches out a hand The manual switch part (31) is capable of rotating downward and passing through the housing (1); the manual switch part (31), the rotation point of the latch rocker arm (3) and the panel lock buckle (7) are arranged in sequence; the manual switch part (31) is arranged below the same side of the electromagnet (2); the latch rocker arm (3) and the panel lock buckle (7) are separated from the electromagnet (2) in sequence; and the two torsion spring arms of the torsion spring (5) are respectively connected to the upper end of the latch rocker arm (3) and the lower end of the housing (1).

2. The electromagnetic latch for aircraft interior according to claim 1, characterized in that: The lower end of the latch rocker arm (3) is provided with a lock hook portion (35), and the upper end of the panel lock buckle (7) is provided with a lock shaft. The latch rocker arm (3) can hook the lock shaft of the panel lock buckle (7) through the lock hook portion (35). The latch rocker arm (3) is rotatably installed in the housing (1) through the latch shaft (34). An electromagnetic cover plate (33) is installed on the latch rocker arm (3) and is magnetically connected to the electromagnet (2) through the electromagnetic cover plate (33).

3. The electromagnetic latch for aircraft interior according to claim 2, characterized in that: The spring coil portion of the torsion spring (5) is coaxially arranged with the latch shaft (34).

4. The electromagnetic latch for aircraft interior according to claim 1, characterized in that: The electromagnet (2) is installed in the housing (1) via a housing stopper (4).

5. The electromagnetic latch for aircraft interior according to claim 1, characterized in that: The bottom surface of the shell (1) is provided with a base (6).

6. The electromagnetic latch for aircraft interior according to claim 1, characterized in that: The shell (1) is made of thermoplastic material.

7. The electromagnetic latch for aircraft interior according to claim 2, characterized in that: The torsion spring (5) is made of 65Mn silicon-manganese spring steel, and the latch shaft (34) is made of stainless steel.

8. The electromagnetic latch for aircraft interior according to claim 2, characterized in that: The electromagnetic cover plate (33) is made of magnetic steel or the electromagnetic core is made of magnetic steel.

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