A handheld low-light night vision device

Abstract

The present application provides a handheld low-light-level night vision device, comprising a night vision device body, an objective lens assembly, and an eyepiece assembly. The night vision device body comprises a main shell and a main body accommodated within the main shell; wherein: the main shell is an integrally formed hollow cylindrical structure, and an assembly opening is provided at the front end of the main shell for the main body to be assembled into or out of the main shell; when the main body is in the assembled state, the projected contour edges of the main body, with the plane where the assembly opening is located as the projection surface, are all within the edge line of the assembly opening. The handheld low-light-level night vision device adopts an integrally formed main shell, which reduces the joint seams existing during the assembly of the shell, reduces the molding process, and reduces the cost; at the same time, all parts of the main body of the handheld low-light-level night vision device can be pre-installed before assembly, and then the whole body can be installed in the main shell for fixation, which greatly improves the assembly speed and accuracy, and has a more stable structure.

Description

Technical Field

[0001] The present application relates to the technical field of night vision devices, and in particular to a handheld low-light-level night vision device. Background Art

[0002] A low-light-level night vision device is an instrument that uses light reflected from objects under weak light to observe target objects or environments through low-light CMOS and noise reduction processing to convert images visible to the human eye.

[0003] Since handheld low-light-level night vision devices are often used in outdoor activities, their waterproofness and component stability have a significant impact on their service life. Furthermore, night vision devices are precision optoelectronic devices, and even the slightest looseness of components or interference from fine dust or moisture can affect the imaging quality and accuracy of the device.

[0004] Existing handheld low-light-level night vision devices typically utilize a symmetrical, split-shell housing to house the internal components for ease of manufacturing and assembly. Furthermore, to enhance water and dust resistance, waterproof features are incorporated into joints and other locations. However, in practice, these devices still struggle to meet high IP rating and stability requirements.

[0005] Therefore, it is an urgent problem for those skilled in the art to study a handheld low-light-level night vision device with high waterproof and dustproof grade and stable assembly of parts. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present application provides a handheld low-light-level night vision device to overcome the problems of poor weather resistance and other problems existing in the existing handheld low-light-level night vision devices.

[0007] The present application provides a handheld low-light-level night vision device, which includes a night vision device body, an objective lens assembly, and an eyepiece assembly. The objective lens assembly is mounted at the front end of the night vision device body, and the eyepiece assembly is mounted at the rear end of the night vision device body. The night vision device body includes a main housing and a main body accommodated in the main housing; wherein:

[0008] The main housing is an integrally formed hollow cylindrical structure, and a fitting opening is provided at the front end of the main housing for the main body to be assembled into or out of the interior of the main housing;

[0009] The main body includes an assembled state and a fixed state;

[0010] When the main body is in a fixed state, the main body is fixedly arranged inside the main shell;

[0011] When the main body is in the assembled state, the main body is configured to enter or leave the main housing through the assembly opening along a first movement path; the first movement path is parallel to the center line of the main housing;

[0012] When the main body is in the assembled state, the projected contour edges of the main body with the plane where the assembly opening is located as the projection surface are all within the edge line of the assembly opening.

[0013] In an optional implementation, the main body includes a main bracket, the main bracket is provided with a plurality of guide bars or guide grooves, and the inside of the main shell is provided with guide grooves or guide bars that cooperate with the guide bars or guide grooves of the main bracket; the extension direction of the guide grooves and the guide bars is parallel to the first moving path.

[0014] In an optional implementation, the main body includes at least one rotary coding switch, and the rotary coding switch includes a coding switch body and a knob rod;

[0015] The main bracket is provided with a slide groove for accommodating the rotary coding switch, the slide groove is adapted to the coding switch body, and the coding switch body is configured to be movable along a second movement path within the slide groove, and the second movement path is arranged non-parallel to the first movement path;

[0016] The main housing is provided with a first through hole for the knob rod to pass through, and the first through hole is located on the extension line of the second moving path.

[0017] In an optional implementation, the handheld low-light-level night vision device further includes a top support member and a screw cap;

[0018] The supporting member includes a covering portion and a push rod, one end of the push rod is fixedly connected to the covering portion; the main housing is provided with a second through hole matching the covering portion, the covering portion covers the second through hole, and the push rod extends into the interior of the main housing through the second through hole and abuts against the coding switch body;

[0019] The screw cap is arranged outside the main housing and is connected to the end of the knob rod.

[0020] Specifically, in an optional implementation, the handheld low-light level night vision device further includes a first seal and a second seal, wherein the first seal is arranged between the knob rod and the first through hole, and the second seal is arranged between the covering portion and the second through hole.

[0021] Specifically, in an optional implementation, the handheld low-light level night vision device further includes a first covering member, which is provided on the outer surface of the main housing and covers the exterior of the covering portion;

[0022] The first covering member is provided with a third through hole, and the screw cap passes through the third through hole.

[0023] In an optional implementation, the main body further includes a main control circuit board, a battery, an image sensor, a control switch assembly, and an imaging module disposed on the main bracket, wherein the image sensor, the control switch assembly, and the imaging module are respectively connected to the main control circuit board for signal signals, and the battery is connected to the main control circuit board for power supply;

[0024] The image sensor is arranged at the front end of the main support and is close to the objective lens assembly;

[0025] The imaging module includes an imaging module, which is signal-connected to the main control circuit board. The imaging module is arranged at the rear end of the main bracket and close to the eyepiece assembly.

[0026] Specifically, in an optional implementation, the night vision device body also includes a front cover, the front cover is sealed and covered on the assembly port, the front cover is provided with a working hole for allowing the light collected by the objective lens assembly to enter the main body, the front cover is provided with a mounting seat for fixing the objective lens assembly, and the objective lens assembly is sealed and connected to the mounting seat.

[0027] Specifically, in an optional implementation, an extension cavity shell is provided at the rear end of the main shell, and the imaging module is accommodated inside the extension cavity shell; the eyepiece assembly is sealed and connected to the extension cavity shell.

[0028] In an optional implementation, the main bracket is fixedly connected to the main shell by screws.

[0029] According to the technical solution provided by the aforementioned implementation, the handheld low-light-level night vision device uses an integrally molded main housing, which reduces the number of joints required during housing assembly, reduces the number of molding processes, and reduces costs. Furthermore, all components can be pre-assembled before the main body of the handheld low-light-level night vision device is assembled, and then the entire body is assembled and secured within the main housing. This significantly improves assembly speed and accuracy, and provides a more stable structure. Furthermore, when disassembly is required for maintenance, the main body can be removed from the main housing, making the operation simple and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 A schematic diagram of a handheld low-light-level night vision device provided in one embodiment of the present application;

[0032] Figure 2 An exploded view of a handheld low-light-level night vision device provided in one embodiment of the present application;

[0033] Figure 3 A front view of the main body and main shell provided in one embodiment of the present application;

[0034] Figure 4 A perspective view of a main body and a main shell provided in one embodiment of the present application;

[0035] Figure 5 A combined diagram of the main body and the main shell provided in one embodiment of the present application;

[0036] Figure 6 A schematic diagram of the main body structure installation provided in one embodiment of the present application, including the assembly relationship between the top support, the rotary coding switch, the rotary cap, the first seal, the second seal, and the main bracket;

[0037] Figure 7 A schematic diagram of a main housing provided in one embodiment of the present application;

[0038] Figure 8 A schematic diagram of a main bracket provided in accordance with one embodiment of the present application.

[0039] Description of reference numerals:

[0040] 1. Night vision device body; 2. Objective lens assembly; 3. Eyepiece assembly; 100. Main shell; 200. Main body; 300. Top support member; 400. Screw cap; 101. Assembly port; 102. Guide groove; 103. First through hole; 104. Second through hole; 105. Third through hole; 106. First sealing member; 107. Second sealing member; 110. First cover member; 120. Second cover member; 130. Front cover; 131. Working hole; 132. Mounting seat; 210. Main bracket; 211. Guide strip; 212. Slide groove; 220. Rotary coding switch; 221. Coding switch body; 222. Knob rod; 230. Main control circuit board; 240. Battery; 250. Image sensor; 260. Control switch assembly; 261. Key panel; 270. Imaging module; 310. Covering part; 320. Top rod. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] As used herein, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more.

[0043] In addition, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to changes in the orientation of the structure.

[0044] See also Figure 1 and Figure 2 One embodiment of the present application provides a handheld low-light-level night vision device, which includes a night vision device body 1, an objective lens assembly 2, and an eyepiece assembly 3. The objective lens assembly 2 is installed at the front end of the night vision device body 1, and the eyepiece assembly 3 is installed at the rear end of the night vision device body 1. The night vision device body 1 includes a main shell 100 and a main body 200 accommodated inside the main shell 100.

[0045] The objective lens assembly 2 is an important component of a night vision device. It generally uses a combination of multiple lenses and filters to guide external light, especially weak light in a dark environment, into the main body 200 for processing and imaging. The objective lens assembly 2 described in this application can be obtained using existing technology and is not particularly limited.

[0046] The eyepiece assembly 3 is a conventional accessory for night vision devices, telescopes, etc., which generally includes eyepiece lenses, etc. Its function is to facilitate the eye to be close to the handheld low-light night vision device for observation. The eyepiece assembly 3 described in this application can be obtained using existing technology and is not particularly limited.

[0047] Currently, conventional handheld low-light-level night vision devices mostly use two symmetrical shell components to form the outer shell for easy installation. However, since the two pieces are joined together, there is a long seam, which poses the risk of water seepage. Therefore, sealing rings are generally used for waterproofing. However, due to the need for lightweight, the outer shell is generally thin and mostly made of plastic. Therefore, during use, the outer shell will inevitably produce a certain amount of stress deformation, affecting the sealing of the seam.

[0048] However, if adhesives are used to bond and seal the joint gaps, it will make maintenance and disassembly difficult and may cause irreversible damage to the shell.

[0049] Therefore, in this application, the main housing 100 and the main body 200 are specially designed to solve the problems existing in the prior art. Figures 1 to 8 , the solution of this application is described in detail.

[0050] Combine Figures 2 to 7 As shown, specifically, the main shell 100 is an integrally formed hollow cylindrical structure, and a front end of the main shell 100 is provided with an assembly opening 101 for the main body 200 to be assembled into or out of the interior of the main shell 100.

[0051] Combine Figures 2 to 6 As shown, specifically, the main body 200 includes an assembled state and a fixed state.

[0052] When the main body 200 is in a fixed state, the main body 200 is fixedly disposed inside the main housing 100;

[0053] Combine Figures 2 to 4 As shown, when the main body 200 is in the assembled state, the main body 200 is configured to enter or leave the main housing 100 through the assembly opening 101 along a first moving path.

[0054] The first moving path is when assembling, that is, Figure 2 For ease of assembly, the first moving path is parallel to the center line of the main housing 100 .

[0055] In this application, combined Figure 3 As shown, when the main body 200 is in the assembled state, the projected contour edges of the main body 200, projected on the plane where the assembly opening 101 is located, are all within the edge lines of the assembly opening 101. This design allows the main body 200 to be directly installed into the main housing 100 without the need for further assembly of the main housing 100, greatly improving assembly efficiency, precision, and stability.

[0056] The main body 200 includes a main bracket 210, which is provided with a plurality of guide bars 211 or guide grooves 102. The main shell 100 is internally provided with guide grooves 102 or guide bars 211 that match the guide bars 211 or guide grooves 102 of the main bracket 210; the extension direction of the guide grooves 102 and the guide bars 211 is parallel to the first moving path.

[0057] Specific, combined Figure 4 、 Figure 7 as well as Figure 8As shown, in this embodiment, the main bracket 210 is provided with a plurality of guide bars 211, and the inner wall of the main housing 100 is provided with a plurality of guide grooves 102 that cooperate with the guide bars 211 of the main bracket 210. The guide bars 211 and the guide grooves 102 are clearance-fitted to allow the main bracket 210 to be smoothly installed into the interior of the main housing 100.

[0058] In other embodiments, a guide bar 211 may be provided on the inner wall of the main housing 100 , and a guide groove 102 cooperating with the guide bar 211 may be provided on the main bracket 210 .

[0059] Combine Figure 2 and Figure 6 As shown, in this embodiment, the main body 200 includes at least one rotary coding switch 220 , and the rotary coding switch 220 includes a coding switch body 221 and a knob rod 222 .

[0060] The rotary coding switch 220 can be obtained in the prior art, and this application only briefly describes its structure to further illustrate the design concept of this application.

[0061] Specifically, such as Figure 6 As shown, the main bracket 210 is provided with a slide groove 212 for accommodating the rotary coding switch 220, and the slide groove 212 is adapted to the coding switch body 221. The coding switch body 221 is configured to be movable along a second moving path in the slide groove 212, and the second moving path is non-parallel to the first moving path.

[0062] The second moving path, referring to Figure 6 The assembly line is shown in .

[0063] The second moving path is arranged non-parallel to the first moving path, that is, specifically, the first moving path and the second moving path may be arranged to intersect or be arranged in different planes.

[0064] In this embodiment, in the top view or bottom view of the handheld low-light level night vision device, the first moving path and the second moving path are orthogonally arranged. The orthogonal arrangement in the top view can greatly reduce the internal structural space design and facilitate the pushing of the rotary coding switch 220 in the slide groove 212.

[0065] In other embodiments, in a top view or a bottom view of the handheld low-light-level night vision device, the first moving path and the second moving path may also be arranged to be inclined.

[0066] Specifically, such as Figure 2As shown, the main housing 100 is provided with a first through hole 103 for the knob rod 222 to pass through, and the first through hole 103 is located on the extension line of the second moving path, so that the knob rod 222 is exposed from the main housing 100 .

[0067] In this embodiment, the handheld low-light-level night vision device further includes a top support member 300 and a screw cap 400 .

[0068] Specifically, such as Figure 2 The supporting member 300 includes a covering portion 310 and a push rod 320, one end of the push rod 320 is fixedly connected to the covering portion 310; the main shell 100 is provided with a second through hole 104 matching the covering portion 310, the covering portion 310 covers the second through hole 104, and the push rod 320 extends into the interior of the main shell 100 from the second through hole 104 and abuts against the coding switch body 221.

[0069] Meanwhile, the rotary cap 400 is disposed outside the main housing 100 and is connected to the end of the knob rod 222. The rotary cap 400 is used to assist in rotating and pressing the rotary coding switch 220.

[0070] The function of the supporting member 300 is to push the rotary coding switch 220 outward when the main body 200 is assembled into the main shell 100, so that the knob rod 222 is exposed from the main shell 100, which is convenient for installing the rotary cap 400 and plays a positioning and supporting role for the rotary coding switch 220.

[0071] In this embodiment, the handheld low-light level night vision device further includes a first seal 106 and a second seal 107 . The first seal 106 is disposed between the knob rod 222 and the first through hole 103 , and the second seal 107 is disposed between the covering portion 310 and the second through hole 104 .

[0072] The first sealing member 106 and the second sealing member 107 are used to seal the gap between the rotary coding switch 220 or the supporting member 300 and the main housing 100 to enhance waterproof and dustproof effects.

[0073] In this embodiment, the handheld low-light level night vision device further includes a first covering member 110 , which is disposed on the outer surface of the main housing 100 and covers the exterior of the covering portion 310 ;

[0074] Specifically, the first covering member 110 is provided with a third through hole 105 , and the screw cap 400 passes through the third through hole 105 .

[0075] The first covering member 110 can wrap the supporting member 300 to fix the supporting member 300 .

[0076] In this embodiment, the structure of the first covering member 110 is adapted to the covered area of ​​the main shell 100, and the first covering member 110 is fixed to the main shell 100 through a snap-fit ​​structure so that the first covering member 110 and the main shell 100 are firmly arranged and tightly fitted without a gap, thereby improving the waterproof and dustproof effects.

[0077] In this embodiment, combined with Figure 4 As shown, the main body 200 further includes a main control circuit board 230, a battery 240, an image sensor 250, a control switch assembly 260, and an imaging module 270, which are arranged on the main bracket 210. The image sensor 250, the control switch assembly 260, and the imaging module 270 are respectively connected to the main control circuit board 230 for signal signals, and the battery 240 is connected to the main control circuit board 230 for power supply.

[0078] The image sensor 250 is disposed at the front end of the main support 210 and is close to the objective lens assembly 2;

[0079] The imaging module 270 includes an imaging module, which is signal-connected to the main control circuit board 230 . The imaging module 270 is disposed at the rear end of the main bracket 210 and close to the eyepiece assembly 3 .

[0080] Specifically, the imaging module is a device already available in the prior art, such as an imaging screen, etc., which is used to receive signals and form images, and is not specifically limited or described in this application.

[0081] Specifically, the image sensor 250 is a CMOS sensor, which is used to receive light guided by the objective lens assembly 2 and convert the optical signal into an electrical signal. CMOS (Complementary Metal-Oxide-Semiconductor) sensors are optoelectronic devices already available in the prior art and are not specifically limited or described in this application.

[0082] The control switch assembly 260 is used to input control signals to the handheld low-light level night vision device. The control signals may include power control, shooting control, etc. Its control principle and control method can be obtained by using existing technologies and are not specifically limited or described in this application. It should be noted that, in this embodiment, the control switch assembly 260 is arranged at the upper end of the main bracket 210, and the main shell 100 reserves an operating hole that is adapted to the shape of the control switch assembly 260 to operate the control switch assembly 260. In other embodiments, the control switch assembly 260 can also be arranged at the side, bottom, etc.

[0083] In this embodiment, in order to improve the operating feel, a button panel 261 may be further provided above the control switch assembly 260 , and a button identification pattern may be provided on the surface of the button panel 261 to improve the operating guidance.

[0084] The main control circuit board 230 is used to process the photoelectric signal from the image sensor 250 and transmit it to the imaging module 270 for imaging. The main control circuit board 230 performs basic photoelectric signal processing and transmission functions and can be implemented using existing technologies in the field of night vision devices. The main control circuit board 230 is not specifically limited or described in this application.

[0085] Combine Figure 2 As shown, the night vision device body 1 also includes a front cover 130, which is sealed on the assembly port 101. The front cover 130 is provided with a working hole 131 for allowing the light collected by the objective lens assembly 2 to enter the main body 200. The front cover 130 is provided with a mounting seat 132 for fixing the objective lens assembly 2, and the objective lens assembly 2 is sealedly connected to the mounting seat 132.

[0086] In this embodiment, the front cover 130 is provided with a plurality of holes reserved for screw installation and other arrangements.

[0087] In this embodiment, the night vision device body 1 further includes a second cover 120 , which is connected to the front cover 130 to cover some holes reserved in the front cover 130 , thereby improving the waterproof performance and aesthetic appearance.

[0088] In this embodiment, the main bracket 210 is fixedly connected to the main housing 100 by screws.

[0089] Specifically, the main bracket 210 is provided with a plurality of screw holes, and the main housing 100 is fixed to the main bracket 210 by screws.

[0090] The structure and assembly process of the handheld low-light-level night vision device of the present application are described below with reference to the accompanying drawings:

[0091] When assembly is required, the main body 200 is assembled first, that is, the main control circuit board 230, the battery 240, the image sensor 250, the control switch assembly 260, and the imaging module 270 are fixed to the main bracket 210 so that the components of the main body 200 are firmly installed; at the same time, the rotary encoding switch 220 is installed in the slide groove 212, and the main control circuit board 230 and other components are connected;

[0092] It should be further explained that at this time, the rotary coding switch 220 is located in the inner position of the slide slot 212, that is, the rotary coding switch 220 has some space reserved in the slide slot 212 for outward movement. Here, "inside" and "outside" are used as a reference to the interior of the main body 200. The inner portion closer to the main body 200 is "inside", and the opposite is "outside".

[0093] Then as Figure 2 The assembly line shown is to install the main body 200 into the main housing 100 through the assembly opening 101. The cooperation between the guide strip 211 and the guide groove 102 allows the main body 200 to be smoothly and stably installed into the predetermined position.

[0094] Then, the supporting member 300 is inserted from the outside of the main housing 100. At the same time, the supporting member 300 pushes the rotary coding switch 220 outward, so that the front end of the knob rod 222 is exposed from the main housing 100. Then, the first cover 110 is installed on the main housing 100 to fix the supporting member 300. The supporting member 300 supports and fixes the rotary coding switch 220. Then, the rotary cap 400 is installed and fixed to the knob rod 222.

[0095] The above installation steps can be referred to Figure 6 As shown, it should be noted that Figure 6 The exploded view and assembly view provided only show the assembly relationship between the top support member 300, the rotary coding switch 220, the screw cap 400, the first seal 106, the second seal 107 and the main bracket 210. For the sake of clarity, Figure 6 Other structures and components are hidden.

[0096] It should be further explained that, in the above steps, before installing the first cover member 110 , the main body 200 and the main shell 100 are first fixed with screws.

[0097] Combine Figure 2 As shown, the front cover 130 is installed on the assembly port 101 , and then the objective lens assembly 2 is installed, and the second cover member 120 is installed.

[0098] Combine Figure 2 As shown, the eyepiece assembly 3 is installed.

[0099] It should be noted that, in order to improve the waterproof and dustproof effects, waterproof gaskets may be provided at the installation gaps between the front cover 130 , the first cover assembly 110 , the second cover assembly 120 and the main housing 100 .

[0100] Through the above operations, the assembly and fixing of the handheld low-light-level night vision device can be completed. When maintenance is required, the main body 200 can be taken out by simply performing the above operations in reverse, which is convenient and quick.

[0101] To sum up, the handheld low-light level night vision device is assembled and installed through an integrally formed main shell 100 and a pre-installed main body 200, which not only greatly reduces the installation gap to improve the waterproof and dustproof level; and the various components of the main body 200 are pre-installed and fixed, which is not only convenient for installation, but also convenient for testing before assembly, thereby improving the overall assembly efficiency and ensuring product stability.

[0102] The above is a detailed introduction to the handheld low-light level night vision device provided by the implementation method of the present application, and the principles and implementation methods of the present application are explained using specific examples. The above description is only used to help understand the method and core mechanism of the present application; at the same time, for general technical personnel in this field, based on the ideas of the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A handheld low-light-level night vision device, comprising a device body, an objective lens assembly, and an eyepiece assembly, wherein the objective lens assembly is mounted at the front end of the device body, the eyepiece assembly is mounted at the rear end of the device body, and the device body comprises a main housing and a main body accommodated within the main housing; characterized in that: The main housing is an integrally formed hollow cylindrical structure, and a fitting opening is provided at the front end of the main housing for the main body to be assembled into or out of the interior of the main housing; The main body includes an assembled state and a fixed state; When the main body is in a fixed state, the main body is fixedly arranged inside the main shell; When the main body is in the assembled state, the main body is configured to enter or leave the main housing through the assembly opening along a first movement path; the first movement path is parallel to the center line of the main housing; When the main body is in the assembled state, the projected contour edges of the main body on the plane where the assembly opening is located are all within the edge line of the assembly opening; The main body includes a main bracket, the main bracket is provided with a plurality of guide bars or guide grooves, and the main shell is provided with guide grooves or guide bars that match the guide bars or guide grooves of the main bracket; The extending direction of the guide groove and the guide bar is parallel to the first moving path; The main body includes at least one rotary coding switch, and the rotary coding switch includes a coding switch body and a knob rod; The main bracket is provided with a slide groove for accommodating the rotary coding switch, the slide groove is adapted to the coding switch body, and the coding switch body is configured to be movable along a second movement path within the slide groove, and the first movement path and the second movement path are orthogonally arranged; The main housing is provided with a first through hole for the knob rod to pass through, and the first through hole is located on the extension line of the second moving path; The handheld low-light-level night vision device also includes a top support and a screw cap; The supporting member includes a covering portion and a push rod, one end of the push rod is fixedly connected to the covering portion; the main housing is provided with a second through hole matching the covering portion, the covering portion covers the second through hole, and the push rod extends into the interior of the main housing through the second through hole and abuts against the coding switch body; The screw cap is arranged outside the main housing and is connected to the end of the knob rod.

2. The handheld low-light-level night vision device according to claim 1, characterized in that: The handheld low-light-level night vision device further includes a first seal and a second seal. The first seal is arranged between the knob rod and the first through hole, and the second seal is arranged between the covering portion and the second through hole.

3. The handheld low-light-level night vision device according to claim 1, characterized in that: The handheld low-light-level night vision device further includes a first covering member, which is arranged on the outer surface of the main housing and covers the exterior of the covering portion; The first covering member is provided with a third through hole, and the screw cap passes through the third through hole.

4. The handheld low-light-level night vision device according to claim 1, characterized in that: The main body further includes a main control circuit board, a battery, an image sensor, a control switch assembly, and an imaging module arranged on the main bracket. The image sensor, the control switch assembly, and the imaging module are respectively connected to the main control circuit board for signal signals, and the battery is connected to the main control circuit board for power supply. The image sensor is arranged at the front end of the main support and is close to the objective lens assembly; The imaging module includes an imaging module, which is signal-connected to the main control circuit board. The imaging module is arranged at the rear end of the main bracket and close to the eyepiece assembly.

5. The handheld low-light-level night vision device according to claim 4, characterized in that: The night vision device body also includes a front cover, which is sealed on the assembly port. The front cover is provided with a working hole for allowing the light collected by the objective lens assembly to enter the main body. The front cover is provided with a mounting seat for fixing the objective lens assembly, and the objective lens assembly is sealed and connected to the mounting seat.

6. The handheld low-light-level night vision device according to claim 4, characterized in that: An extension cavity shell is provided at the rear end of the main shell, and the imaging module is accommodated inside the extension cavity shell; the eyepiece assembly is sealed and connected to the extension cavity shell.

7. The handheld low-light-level night vision device according to claim 1, characterized in that: The main bracket is fixedly connected to the main shell by screws.

Images