Bridge assembly of binocular night vision device and head-mounted binocular night vision device

Abstract

The invention discloses a binocular night vision device mirror bridge assembly and a head-mounted binocular night vision device. The binocular night vision device mirror bridge assembly comprises a circuit bin, and a circuit board is installed in the circuit bin; a mounting groove for mounting a Hall switch is formed in an inner cavity of the circuit bin; the Hall switch is electrically connected with the power supply and the circuit board; the circuit bin is provided with a magnet bin; a magnet is mounted in the magnet bin; a magnet bin cover used for blocking a bin opening of the magnet bin is detachably installed on the circuit bin. The magnet bin is obliquely arranged; when the magnet moves to the two ends in the magnet bin, digital signals sent by the Hall switch are different. The device has the advantages that the structure is compact, the device does not depend on any specific part on the helmet support, the universality is good, and the reliability is high.

Description

Technical Field

[0001] This invention relates to the field of night vision technology, and particularly to a binocular night vision device lens bridge assembly and a head-mounted binocular night vision device. Background Technology

[0002] The two lenses of a head-mounted binocular night vision device are typically connected by a lens bridge assembly, mounted on a helmet bracket via a connecting bracket, and can be flipped up and down around an axis to switch between the active state (lens tilted down in front of the eyes) and the retracted state (lens tilted up above the helmet). To achieve energy efficiency and safety, an automatic power control mechanism is needed: automatically powering on when the night vision device is tilted down to the active state and automatically powering off when tilted up above the helmet.

[0003] Currently, common solutions have the following inherent drawbacks: Option 1: Install Hall switches and magnets on the lens bridge assembly and helmet bracket respectively. While reliable, this option creates a one-to-one hardware binding between the night vision device and the helmet bracket. Brackets for different helmets are not interchangeable, severely reducing the device's flexibility, interchangeability, and logistical maintenance convenience.

[0004] Option 2: Install a tilt sensor inside the mirror bridge assembly to detect the flip angle. While this option solves the versatility problem, its algorithm and program control are relatively complex, resulting in high cost and power consumption. Poor calibration can easily lead to misjudgments and insufficient reliability. In addition, the sensor in this option has low tolerance to low-temperature environments (such as below -20°C).

[0005] Therefore, there is an urgent need to develop a mirror bridge assembly with high versatility and high reliability that can be flipped to automatically turn on and off, as well as a head-mounted binocular night vision device. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a binocular night vision device lens bridge assembly and a head-mounted binocular night vision device with good versatility and high reliability.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is a binocular night vision device lens bridge assembly, including a circuit compartment, in which a circuit board is installed; the inner cavity of the circuit compartment is provided with a mounting slot for installing a Hall switch; the Hall switch is electrically connected to a power supply and the circuit board; the circuit compartment is provided with a magnet compartment; a magnet is installed in the magnet compartment; a magnet compartment cover is detachably installed at the opening of the magnet compartment; the magnet compartment is tilted; when the magnet moves to both ends in the magnet compartment, the digital signals emitted by the Hall switch are different.

[0008] Furthermore, in use, the Hall switch is located at the bottom of the inner cavity of the circuit compartment.

[0009] In another further embodiment, the Hall switch is located at the top of the inner cavity of the circuit compartment in use.

[0010] Furthermore, in use, the lower part of the magnet compartment is inclined towards the inner cavity of the circuit compartment compared to the upper part.

[0011] Furthermore, the magnet chamber is filled with a buffer solution.

[0012] Furthermore, the magnet compartment cover is threadedly connected to the opening of the circuit compartment.

[0013] Furthermore, the side wall of the magnet compartment cover is provided with a groove for installing a sealing ring.

[0014] Furthermore, the Hall switch is fixedly mounted on the Hall element fixing plate; the Hall element fixing plate is installed in the mounting groove.

[0015] Furthermore, the binocular night vision device's mirror bridge assembly also includes components such as a front bridge, an internal battery compartment, a battery compartment cover, a mirror bridge pressure plate, a switch handwheel, an IR lamp holder, and a circuit board; the mirror bridge pressure plate is connected to the front bridge with screws; the circuit compartment is also connected to the front bridge with screws. A rechargeable battery is installed inside the internal battery compartment. These structures are all existing technologies. The specific layout of the internal structure of the binocular night vision device's mirror bridge assembly may differ between different models of night vision devices, but these are all essential components of the night vision device.

[0016] A head-mounted binocular night vision device includes the aforementioned binocular night vision device lens bridge assembly and two sets of lens barrel assemblies connected thereto; each set of lens barrel assemblies includes an eyepiece assembly and an objective lens assembly; the lens barrel assembly is connected to the binocular night vision device lens bridge assembly via a swing arm; a connecting bracket is detachably mounted on the top of the binocular night vision device lens bridge assembly.

[0017] Beneficial effects of this invention: The binocular night vision device's lens bridge assembly of this invention can achieve automatic power-on / off function upon flipping: in the use state (lens tube flipped down to the front of the eye) and the stowed state (lens tube flipped up above the helmet), the magnets are located at the upper and lower ends of the magnet compartment, respectively, resulting in different distances between the magnets and the Hall switch. The digital signals emitted by the Hall switch differ in the two states. Switching between the two states relies on the external force during flipping and the magnet's own gravity, allowing the magnet to slide within the magnet compartment.

[0018] Compared to traditional automatic power-on / off switching methods, this invention integrates the device within the mirror bridge assembly, resulting in a compact structure that does not affect the overall size and has a lower cost. It does not rely on any specific components on the helmet bracket, enabling plug-and-play use of the night vision device across different helmets, offering excellent versatility. Furthermore, this invention uses two extreme positions of magnet movement for triggering, avoiding false triggers and ensuring high reliability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of Example 1; Figure 2 This is a top view of Example 1; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 This is the front view of Example 1; Figure 5 This is a three-dimensional structural diagram of the circuit compartment in Example 1; Figure 6 This is a partial assembly diagram of the circuit compartment in Example 1; Figure 7 This is a three-dimensional structural schematic diagram of Example 2; Figure 8 This is a schematic diagram of the internal structure of Example 3; Figure 9 This is a three-dimensional structural diagram of the circuit compartment in Example 3; Figure 10 This is a three-dimensional structural diagram of Example 4.

[0020] In the diagram, 1-screw, 2-eyepiece assembly, 3-objective lens assembly, 4-connecting bracket, 5-circuit compartment, 501-magnet compartment, 502-mounting slot, 6-magnet, 7-magnet compartment cover, 8-buffer solution, 9-Hall element fixing plate, 10-Hall switch, 11-front bridge, 12-inner battery compartment, 13-battery compartment cover, 14-swing arm, 15-lens bridge pressure plate, 16-switch handwheel, 17-IR lamp holder. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Example 1 A binocular night vision device lens bridge assembly, such as Figure 1-6 As shown, the circuit includes a circuit compartment 5, in which a circuit board is installed; the inner cavity of the circuit compartment 5 is provided with a mounting slot 502 for installing a Hall switch 10; the Hall switch 10 is electrically connected to the power supply and the circuit board; the circuit compartment 5 is provided with a magnet compartment 501; a magnet 6 is installed in the magnet compartment 501; a magnet compartment cover 7 is detachably installed at the opening of the magnet compartment 501; the magnet compartment 501 is tilted; when the magnet 6 moves to both ends in the magnet compartment 501, the digital signals emitted by the Hall switch 10 are different.

[0023] Specifically, in the usage state, Hall switch 10 is located at the bottom of the inner cavity of circuit compartment 5, and the opening of magnet compartment 501 is at the top. In this embodiment, in the usage state, magnet 6 is located at the bottom of magnet compartment 501, closest to Hall switch 10. Hall switch 10 senses the magnetic field and outputs a high-level signal to MCU (microcontroller) on the circuit board. After receiving this signal, MCU controls the device to switch from standby state to normal operation state. In the retracted state, magnet 6 is located at the opening of magnet compartment 501, furthest from Hall switch 10. Hall switch 10 does not sense the magnetic field and outputs a low-level signal to MCU. MCU controls the device to switch from normal operation state to standby state.

[0024] Specifically, in order to save space and make the structure more compact, in use, the lower part of the magnet compartment 501 is tilted towards the inner cavity of the circuit compartment 5 compared to the upper part.

[0025] Specifically, the magnet compartment 501 is filled with buffer solution 8. The buffer solution acts as a buffer. Without buffer solution 8, the movement of the magnet 6 would become extremely sensitive. When the user performs actions such as running, jumping, or rolling, the magnet 6 might shift within the magnet compartment 501, causing abnormal standby of the device. Adding buffer solution 8 effectively suppresses the movement of the magnet 6, filtering out the effects of these normal, small-amplitude movements, thereby improving the reliability of the device. The buffer solution 8 needs to be able to withstand a wide temperature range, ideally from -50℃ to 60℃.

[0026] Specifically, for ease of disassembly and assembly and good sealing, the magnet compartment cover 7 is threadedly connected to the opening of the circuit compartment 5; the outer surface of the magnet compartment cover 7 is provided with a recess for easy rotation of the magnet compartment cover 7.

[0027] Specifically, the side wall of the magnet compartment cover 7 is provided with a groove for installing a sealing ring. Installing the sealing ring in the groove can improve the sealing effect and prevent buffer leakage.

[0028] Specifically, the Hall switch 10 is fixedly mounted on the Hall element fixing plate 9; the Hall element fixing plate 9 is mounted in the mounting groove 502. In this embodiment, the Hall switch 10 is glued to the Hall element fixing plate 9, which is interference-fitted into the mounting groove 502 and further reinforced with adhesive.

[0029] Specifically, the binocular night vision device's lens bridge assembly also includes a front bridge 11, an internal battery compartment 12, a battery compartment cover 13, a lens bridge pressure plate 15, a switch handwheel 16, an IR lamp holder 17, and a circuit board. The lens bridge pressure plate 15 is connected to the front bridge 11 by screws 1; the circuit board compartment 5 is connected to the front bridge 11 by screws 1. A battery is installed in the internal battery compartment 12. These structures are common in binocular night vision devices and belong to existing technology. The specific layout of the internal structure of the binocular night vision device's lens bridge assembly may differ between different models of night vision devices. The switch handwheel 16 is for ergonomic purposes, mounted on the switch shaft, and connected to the switch shaft by a locking screw. The IR lamp holder 17 is used to install the IR transmitter and can be integrated with the front bridge 11. In this embodiment, for ease of manufacturing, the IR lamp holder 17 and the front bridge 11 are made into two separate components.

[0030] In this embodiment, the Hall switch 10 is a switch-type Hall sensor. The angle between the axis of the magnet chamber 501 and the vertical line is 10°; the inner diameter of the magnet chamber 501 is 5.4mm, the length is 17.3mm, and the movement distance of the magnet 6 is 11.3mm; when the magnet 6 is close to the Hall switch 10, the horizontal distance from the center of the Hall switch 10 to the center of the lower end face of the magnet 6 is 8.3mm, and the vertical distance is 0mm; when the magnet 6 is far from the Hall switch 10, the horizontal distance from the center of the Hall switch 10 to the center of the lower end face of the magnet 6 is 10.2mm, and the vertical distance is 10.1mm. The magnet 6 is of model N35, with dimensions of ⌀5x6mm; the surface magnetic field strength is 3500Gs±200Gs. The buffer solution 8 uses SAIC-GM DEX-COOL coolant, model number 93735744. When implementing the technical solution of this patent, the parameters of the magnet chamber 501 and the magnet 6 can be reasonably adjusted according to the model and size of the night vision device, and the buffer solution 8 can also be adjusted. Specific parameters can be obtained through simulation or multiple experiments.

[0031] Example 2 A type of head-mounted binocular night vision device, such as Figure 7 As shown, it includes the above-mentioned binocular night vision device lens bridge assembly and two sets of lens barrel assemblies connected thereto; each set of lens barrel assemblies includes an eyepiece assembly 2 and an objective lens assembly 3; the lens barrel assembly is connected to the binocular night vision device lens bridge assembly via a swing arm 14; a connecting bracket 4 is detachably installed on the top of the binocular night vision device lens bridge assembly.

[0032] Example 3 A binocular night vision device lens bridge assembly, such as Figure 8-9As shown, Embodiment 3 and Embodiment 1 are different models. The most significant difference compared to Embodiment 1 is the change in the position of the Hall switch 10. In this embodiment, in the active state, the Hall switch 10 is located at the top of the inner cavity of the circuit compartment 5, the opening of the magnet compartment 501 is at the bottom, and the magnet 6 is located at the opening end of the magnet compartment 501, furthest from the Hall switch 10. The Hall switch 10 cannot sense the magnetic field, and at this time, it outputs a low-level signal to the MCU (microcontroller) on the circuit board. Upon receiving this signal, the MCU controls the device to switch from standby mode to normal operation mode. In the retracted state, the magnet 6 is located at the bottom end of the magnet compartment 501, closest to the Hall switch 10. The Hall switch 10 senses the magnetic field, and at this time, it outputs a high-level signal to the MCU (microcontroller) on the circuit board. Upon receiving this signal, the MCU controls the device to switch from normal operation mode to standby mode. Furthermore, in this embodiment, the front axle 11 and the inner battery compartment 12 are integrated into one unit.

[0033] Example 4 A type of head-mounted binocular night vision device, such as Figure 10 As shown, it includes the above-mentioned binocular night vision device lens bridge assembly and two sets of lens barrel assemblies connected thereto; each set of lens barrel assemblies includes an eyepiece assembly 2 and an objective lens assembly 3; the lens barrel assembly is connected to the binocular night vision device lens bridge assembly via a swing arm 14; a connecting bracket 4 is detachably installed on the top of the binocular night vision device lens bridge assembly.

[0034] Furthermore, the Hall switch 10, circuit compartment 5, magnet compartment 501, mounting groove 502, magnet 6, magnet compartment cover 7, and buffer solution 8 structures in this invention can also be applied to monocular night vision devices.

[0035] Working principle of the invention: When the night vision goggles are flipped down in front of the eyes and flipped up above the helmet in the retracted state, magnet 6 is located at the upper and lower ends of the magnet compartment 501, respectively. This results in different distances between magnet 6 and Hall switch 10, and different digital signals emitted by Hall switch 10 in the two states, thereby controlling the power supply. The switching between the two states relies on the external force during flipping and the magnet's own gravity, allowing the magnet to slide within the magnet compartment 501, ensuring high reliability. It does not depend on any specific components on the helmet frame, enabling plug-and-play use of the night vision device across different helmets, offering good versatility. Integrated within the lens bridge assembly, it has a compact structure and does not affect the overall size.

[0036] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A binocular night vision device lens bridge assembly, characterized in that: The device includes a circuit compartment (5), the inner cavity of which is provided with a mounting groove (502) for mounting a Hall switch (10); the circuit compartment (5) is provided with a magnet compartment (501); a magnet (6) is installed in the magnet compartment (501); a magnet compartment cover (7) is detachably installed at the opening of the magnet compartment (501); the magnet compartment (501) is tilted; when the magnet (6) moves to both ends in the magnet compartment (501), the digital signals emitted by the Hall switch (10) are different.

2. The binocular night vision device lens bridge assembly according to claim 1, characterized in that: In use, the Hall switch (10) is located at the bottom of the inner cavity of the circuit compartment (5).

3. The binocular night vision device mirror bridge assembly according to claim 1, characterized in that: In use, the Hall switch (10) is located at the top of the inner cavity of the circuit compartment (5).

4. The binocular night vision device lens bridge assembly according to claim 3, characterized in that: In use, the lower part of the magnet compartment (501) is inclined toward the inner cavity of the circuit compartment (5) compared to the upper part.

5. The binocular night vision device lens bridge assembly according to any one of claims 1-4, characterized in that: The magnet compartment (501) is filled with buffer solution (8).

6. The binocular night vision device lens bridge assembly according to claim 1, characterized in that: The magnet compartment cover (7) is threadedly connected to the opening of the circuit compartment (5).

7. The binocular night vision device lens bridge assembly according to claim 1, characterized in that: The side wall of the magnet compartment cover (7) is provided with a groove for installing a sealing ring.

8. The binocular night vision device lens bridge assembly according to claim 1, characterized in that: The Hall switch (10) is fixedly mounted on the Hall element fixing plate (9); the Hall element fixing plate (9) is mounted in the mounting groove (502).

9. A head-mounted binocular night vision device, characterized in that: It includes the binocular night vision device bridge assembly as described in any one of claims 1-8 and two sets of lens tube assemblies connected thereto; each set of lens tube assemblies includes an eyepiece assembly (2) and an objective lens assembly (3); the lens tube assembly is connected to the binocular night vision device bridge assembly via a swing arm (14); a connecting bracket (4) is detachably installed on the top of the binocular night vision device bridge assembly.

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