An electromagnetic latch

Abstract

The utility model relates to the technical field of electromagnetic lock, especially an electromagnetic lock bolt, including the casing, the lock bolt rocker is rotated and is located in the casing cavity, and the hanging end and the unlocking end are equipped on it: the hanging end is used for separating or combining with the oxygen mask assembly, and the unlocking end at least partially extends the casing cavity. The electromagnet is equipped in the casing and constitutes the magnetic force cooperation with the lock bolt rocker: when the electromagnet is on, the lock bolt rocker rotates around the articulated axle, and the corresponding hanging end separates or combines with the oxygen mask assembly, the unlocking end is assembled to be able to carry out the rotation of the lock bolt rocker around the articulated axle by the manual operation unlocking end, the unlocking end is pressed through the hand or unlocking tool, can drive the lock bolt rocker to rotate around the articulated axle, makes it rotate a certain angle and forces the electromagnetic cover plate to overcome the magnetic force of the magnetic steel, realizes the manual release, ensures the oxygen mask assembly to pop out. The lock bolt can ensure the normal release of the oxygen mask assembly through the artificial intervention when the restraint cannot be normally removed.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic lock technology, and in particular to an electromagnetic latch. Background Technology

[0002] Electromagnetic latches are a type of access control security device that uses electromagnetic induction to lock and unlock. Their core is driven by electromagnetic force to activate the internal locking mechanism. They are characterized by fast response, compact structure, and high reliability, and are widely used in various scenarios that require precise access control.

[0003] In the aerospace field, electromagnetic latches, as core components of various oxygen units on board aircraft, play a crucial role in ensuring the respiratory safety of personnel during flight. In specific applications, oxygen units are typically equipped with a sealed door for storing oxygen masks. The electromagnetic latch is directly linked to the locking mechanism of this door: when the system receives a release command, the electromagnetic latch is energized, and its internal locking mechanism releases the constraint on the door under the action of electromagnetic force, thereby enabling the door to automatically open and ensuring that the oxygen masks can be quickly exposed and used by personnel. The stability and timeliness of this process are directly related to the safety assurance level of aerospace missions.

[0004] However, current electromagnetic latches used in the aerospace field have significant limitations in their functional design: existing devices generally rely solely on the on / off state of the electromagnet to control the release of the oxygen mask, without constructing redundant control or emergency backup mechanisms. This single control mode poses significant safety hazards in actual use. Once the electromagnetic latch experiences problems such as electromagnet failure, circuit malfunction, or mechanism jamming, the locking mechanism will directly fail to release the constraint normally, thus preventing the oxygen mask from releasing as expected. More importantly, the existing structure does not have a manual release switching path designed in it. Even if the operator discovers the fault, they cannot forcibly release the locking state through manual intervention, greatly increasing the safety risks in emergency situations and failing to meet the stringent requirements of the aerospace field for high reliability and high safety of equipment. Utility Model Content

[0005] The purpose of this invention is to provide an electromagnetic latch that addresses the problem of the electromagnetic latch failing to release its restraints, allowing for manual intervention to ensure the proper release of the oxygen mask assembly.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An electromagnetic latch, comprising:

[0008] case;

[0009] A latch rocker is rotatably disposed within the cavity of the housing, and the latch rocker is provided with a hook end for disengaging from or engaging with the oxygen mask assembly;

[0010] An electromagnet is mounted on the housing and forms a magnetic connection with the latch rocker. When the electromagnet is energized or de-energized, the latch rocker rotates around the hinge axis, corresponding to the two actions of disengaging or engaging the hook end with the oxygen mask assembly.

[0011] The latch rocker is further provided with an unlocking end, at least a portion of which extends out of the cavity of the housing. The unlocking end is configured to allow the latch rocker to rotate about the hinge axis by manual operation of the unlocking end.

[0012] This utility model also has the following technical features:

[0013] In one embodiment of this utility model, the latch rocker is further provided with a connecting end, the unlocking end, the hooking end and the connecting end are arranged in a triangle, and an electromagnetic cover plate is provided on the connecting end, and the electromagnet is magnetically engaged with the electromagnetic cover plate.

[0014] In one embodiment of this utility model, the latch rocker arm is provided with a shaft hole, a shaft body is provided in the shaft hole, the shaft body is rotatably mounted on the housing, and a torsion spring is provided on the shaft body, with both ends of the torsion spring connected to the shaft body and the latch rocker arm respectively.

[0015] In one embodiment of the present invention, a manual unlocking interface is provided at the bottom of the housing, the manual unlocking interface corresponds to the unlocking end of the latch rocker, and at least a portion of the unlocking end of the latch rocker extends into the manual unlocking interface.

[0016] In one embodiment of the present invention, the bottom of the housing is further provided with a rocker arm locking hook interface, which is used for connecting and releasing the oxygen supply mask assembly to the latch rocker arm.

[0017] In one embodiment of this utility model, the latch rocker arm has a strip-shaped hole at its attachment end, and an opening is provided at the attachment end.

[0018] In one embodiment of the present invention, the bottom of the housing has an oxygen mask connection structure that is connected to the oxygen mask assembly.

[0019] In one embodiment of this utility model, the surface of the housing is provided with a wiring groove, and the electromagnet is connected to an external control terminal through an electromagnet wire passing through the wiring groove.

[0020] In one embodiment of the present invention, the housing includes a first housing and a second housing, which are connected by fasteners.

[0021] In one embodiment of this utility model, an electromagnet mounting position for mounting the electromagnet is provided inside the housing.

[0022] Compared with existing technologies, the beneficial effects of this invention are as follows: By energizing the electromagnet, its internal coil is excited, and the magnetic force generated by the coil cancels out the magnetic force of the magnet. This causes the latch lever to rotate by a certain angle, allowing the oxygen mask assembly to disengage from the hook end through the non-closed part, thus releasing the oxygen mask assembly. By manually pressing the unlocking end with an unlocking tool, the latch lever rotates by a certain angle, forcing the electromagnetic cover plate to overcome the magnetic force of the magnet, thereby achieving manual release and ensuring the ejection of the oxygen mask assembly. When the electromagnetic latch fails to release the constraint normally, manual intervention can be used to ensure the normal release of the oxygen mask assembly. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the electromagnetic latch in one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the electromagnetic latch in one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the interior of the electromagnetic latch in one embodiment of the present invention from a first-view perspective;

[0026] Figure 4 This is a schematic diagram of the interior of the electromagnetic latch in one embodiment of the present invention from a second perspective;

[0027] Figure 5 A schematic diagram of the structure of the latch rocker in one embodiment of this utility model;

[0028] Figure 6 This is a schematic diagram of the electromagnetic latch being energized and unlocked in one embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the manual unlocking of the electromagnetic latch in one embodiment of the present invention.

[0030] Explanation of icon numbers:

[0031] 100. Housing; 110. First housing; 111. Electromagnet mounting position; 120. Second housing; 130. Manual unlocking interface; 140. Rocker arm locking hook interface; 150. Oxygen mask connection structure;

[0032] 200, latch lever; 210, unlocking end; 220, shaft hole; 230, hook end; 240, connecting end;

[0033] 300, Electromagnetic cover plate; 400, Shaft; 500, Torsion spring; 600, Electromagnet; 610, Electromagnet wire. Detailed Implementation

[0034] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0035] The illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0036] Current electromagnetic latches used in the aerospace field have significant limitations in their functional design: existing devices generally rely solely on the on / off state of an electromagnet to control the release of the oxygen mask, without constructing redundant control or emergency backup mechanisms. This single control mode poses significant safety hazards in practical use. Once the electromagnetic latch experiences problems such as electromagnet failure, circuit malfunction, or mechanism jamming, the locking mechanism will be unable to release the constraint normally, resulting in the oxygen mask failing to release as expected. More importantly, the existing structure does not have a manual release switching path designed. Even if the operator discovers the fault, they cannot forcibly release the locking state through manual intervention, greatly increasing the safety risks in emergency situations and failing to meet the stringent requirements of high reliability and high safety in the aerospace field. To address this, an electromagnetic latch is proposed, comprising: a housing 100; a latch rocker 200, rotatably disposed within the cavity of the housing 100, and the latch rocker 200 having a hook end 230. The hook end 230 is used to detach from or engage with the oxygen mask assembly; the electromagnet 600 is disposed on the housing 100 and forms a magnetic engagement with the latch rocker 200. When the electromagnet 600 is energized or de-energized, the latch rocker 200 rotates around the hinge axis, corresponding to the two actions of detaching from or engaging with the oxygen mask assembly via the hook end 230; wherein, the latch rocker 200 is also provided with an unlocking end 210, the unlocking end 210 extending at least a portion of the cavity of the housing 100, and the unlocking end 210 is configured to allow the latch rocker 200 to rotate around the hinge axis by manual operation of the unlocking end 210.

[0037] In one embodiment, the latch rocker 200 is further provided with a connecting end 240, the unlocking end 210, the hooking end 230 and the connecting end 240 are arranged in a triangle, and an electromagnetic cover plate 300 is provided on the connecting end 240, and the electromagnet 600 is magnetically engaged with the electromagnetic cover plate 300.

[0038] In the above embodiments, combined with Figure 6 As shown, it should be noted that the electromagnet 600 contains a magnet. When the electromagnet 600 is not energized, the electromagnet 600 and the electromagnetic cover plate 300 are in an attracted state. That is, in the normal state, because the electromagnet 600 contains a magnet, the magnet can attract the electromagnetic cover plate 300, so that the electromagnet 600 and the electromagnetic cover plate 300 are in an attracted state in the normal state.

[0039] Similarly, when the electromagnet 600 is energized, the electromagnet 600 and the magnet are in a state of magnetic force cancellation, so that the latch rocker 200 rotates through the self-resetting shaft structure and disengages the oxygen mask assembly from the hook end 230.

[0040] Furthermore, by energizing the electromagnet 600, its internal coil is excited, and the magnetic force generated by the coil cancels out the magnetic force of the magnet. (The direction of the magnetic force generated by the coil is as follows...) Figure 6 As shown by the arrow in the image, the latch rocker 200 is rotated by a certain angle due to the reset structure on the latch rocker 200 and the gravity of the electromagnetic cover plate 300. The state after rotation is as follows. Figure 6 As shown, it should be further explained that when the latch lever 200 is rotated, the oxygen mask assembly can be released by detaching from the hook end 230 through the non-closed part of the hook end 230.

[0041] Combination Figure 7 As shown, in a faulty state, the electromagnet 600 may fail to detach the oxygen mask assembly due to a lack of timely power supply. In this case, manually press or use an unlocking tool to press the unlocking end 210 (press in the direction of pressure as shown). Figure 7 (As indicated by the arrow in the image), so that the latch rocker 200 overcomes the magnetic force of the magnet and rotates at a certain angle, thereby achieving manual release and ensuring the ejection of the oxygen mask assembly.

[0042] In one embodiment, in the above-described reset structure, see [reference needed]. Figure 4 The device includes a shaft hole 220 provided on the latch rocker 200, a shaft body 400 provided in the shaft hole 220, the shaft body 400 being rotatably mounted on the housing 100, and a torsion spring 500 provided on the shaft body 400, with both ends of the torsion spring 500 being connected to the shaft body 400 and the latch rocker 200, respectively.

[0043] In the above embodiment, when the electromagnet 600 is energized to drive the latch rocker 200 to rotate, the torsion spring 500 is reset. When the electromagnet 600 is de-energized, the electromagnetic cover plate 300 is attracted by the magnet and overcomes the torsion force of the torsion spring, so that the electromagnetic cover plate 300 and the electromagnet 600 remain in an attracted state.

[0044] It should also be noted that when the electromagnet 600 is not energized, the magnet of the electromagnet 600 is magnetically connected to the electromagnetic cover plate 300, overcoming the torque of the torsion spring 500. At this time, the torsion spring 500 is in a torsional state. When the coil of the electromagnet 600 is energized, the magnetic force generated by its coil cancels out the magnetic force of the magnet. At this time, through the reset action of the torsion spring 500, the latch rocker 200 is rotated, thereby realizing the release of the oxygen mask assembly.

[0045] In one embodiment, see Figure 2 , 34, 6, 7. A manual unlocking interface 130 is provided at the bottom of the housing 100. The manual unlocking interface 130 corresponds to the unlocking end 210 of the latch rocker 200. At least a portion of the unlocking end 210 of the latch rocker 200 extends into the manual unlocking interface 130. This allows the operator to more easily press the unlocking end 210, thereby enabling the electromagnetic cover 300 and the electromagnet 600 to be manually separated, and thus allowing the oxygen mask assembly to be manually released.

[0046] In one embodiment, the bottom of the housing 100 is further provided with a rocker arm locking hook interface 140, which is used for connecting and releasing the oxygen supply mask assembly to the hook end 230 of the latch rocker 200. Specifically, the manual unlocking interface 130 allows the unlocking end 210 of the latch rocker 200 to be pressed by an external force. When the unlocking end 210 is pressed by an external force, the latch rocker 200 rotates to disengage the oxygen mask assembly from the hook end 230.

[0047] In one embodiment, the latch rocker 200 has a slotted end 230 with an opening.

[0048] Furthermore, the bottom of the housing 100 has an oxygen mask connection structure 150 for connecting to the oxygen mask assembly. To prevent the oxygen mask assembly from falling directly, the oxygen mask connection structure 150 is provided at the bottom of the housing 100 to keep the oxygen mask assembly in a suspended state.

[0049] Specifically, the housing 100 has a wiring groove on its surface, and the electromagnet 600 is connected to an external control terminal through an electromagnet wire 610 passing through the wiring groove.

[0050] To facilitate the assembly and disassembly of the housing 100, the housing 100 includes a first housing 110 and a second housing 120, which are connected by fasteners.

[0051] Specifically, see Figure 1 and Figure 4 The housing 100 has an electromagnet mounting position 111 for mounting the power supply magnet 600. When the first housing 110 and the second housing 120 are connected, the electromagnet 600 is confined within the electromagnet mounting position 111. By providing the electromagnet mounting position 111 within the housing 100, the electromagnet mounting positions 111 are distributed on the first housing 110 and the second housing 120. When the first housing 110 and the second housing 120 are connected, the electromagnet mounting position 111 fits into the periphery of the electromagnet 600, thereby fixing the electromagnet 600.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electromagnetic latch, characterized in that, include: Casing (100); A latch rocker arm (200) is rotatably disposed within the cavity of the housing (100). The latch rocker arm (200) is provided with a hook end (230) for disengaging from or engaging with the oxygen mask assembly. An electromagnet (600) is disposed on the housing (100) and forms a magnetic engagement with the latch rocker (200). When the electromagnet (600) is energized or de-energized, the latch rocker (200) rotates around the hinge axis, and the hook end (230) is disengaged from or engaged with the oxygen mask assembly. The latch rocker (200) is also provided with an unlocking end (210), the unlocking end (210) extends at least part of the cavity of the housing (100), and the unlocking end (210) is configured to enable the latch rocker (200) to rotate about the hinge axis by manually operating the unlocking end (210).

2. The electromagnetic latch according to claim 1, characterized in that: The latch rocker (200) is also provided with a connecting end (240). The unlocking end (210), the hooking end (230) and the connecting end (240) are arranged in a triangle. An electromagnetic cover plate (300) is provided on the connecting end (240). The electromagnet (600) and the electromagnetic cover plate (300) are magnetically engaged.

3. The electromagnetic latch according to claim 1, characterized in that: The latch rocker (200) is provided with a shaft hole (220), and a shaft body (400) is provided in the shaft hole (220). The shaft body (400) is rotatably mounted on the housing (100). A torsion spring (500) is provided on the shaft body (400), and the two ends of the torsion spring (500) are respectively connected to the shaft body (400) and the latch rocker (200).

4. The electromagnetic latch according to claim 1, characterized in that: The bottom of the housing (100) is provided with a manual unlocking interface (130), which corresponds to the unlocking end (210) of the latch rocker (200). At least a portion of the unlocking end (210) of the latch rocker (200) extends into the manual unlocking interface (130).

5. The electromagnetic latch according to claim 1, characterized in that: The bottom of the housing (100) is also provided with a rocker arm lock hook interface (140), which is used to connect and release the oxygen mask assembly to the hook end (230) of the latch rocker (200).

6. The electromagnetic latch according to claim 1, characterized in that: The latch rocker (200) has a strip-shaped hole at its hook end (230), and an opening is provided at the hook end (230).

7. The electromagnetic latch according to claim 1, characterized in that, The bottom of the housing (100) has an oxygen mask connection structure (150) that is connected to the oxygen mask assembly.

8. The electromagnetic latch according to claim 1, characterized in that, The housing (100) has a wiring groove on its surface, and the electromagnet (600) is connected to an external control terminal through the electromagnet wire (610) passing through the wiring groove.

9. The electromagnetic latch according to any one of claims 1 to 8, characterized in that, The housing (100) includes a first housing (110) and a second housing (120), which are connected by fasteners.

10. The electromagnetic latch according to claim 9, characterized in that, The housing (100) is provided with an electromagnet mounting position (111) for mounting the electromagnet (600).

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