A night vision lens

Abstract

The utility model discloses a night vision lens, including lens component, the lens component includes sleeve and installs several lenses in sleeve inside, the several lenses are all plastic lenses, its characterized in that: still include the clamping cover, the clamping cover includes the annular ring and the several buckles that axially extend from the annular ring edge, the several buckles are distributed in the circumferential interval, is provided with the clamping groove in the outer surface of sleeve near the end position, and the annular ring is located sleeve one end and is pressed several lenses, and the several buckles are buckled with the clamping groove. Plastic lens is lighter, and the cost is low, and needs the smaller locking force, and the several buckles are buckled with the clamping groove, and the structure is simple, and the low cost of opening mould, and the installation is convenient to dismount.

Description

Technical Field

[0001] This utility model relates to night vision lenses, and more particularly to night vision objective lens components. Background Technology

[0002] Existing objective lens assemblies include a lens barrel containing several lens elements arranged sequentially from front to back. A retaining ring is located inside the front end of the lens barrel, and this retaining ring is threadedly connected to the inner wall of the lens barrel. Gaskets are used to separate the edges of the individual objective lenses. For a detailed structure, see patent number CN201310192772, titled "A Utility Model Patent for a Receiving Objective Lens Suitable for a Small Online Measuring Instrument for Rare Air Density." These lens elements are generally glass, which are heavy, costly, and require significant locking force. Therefore, a retaining ring is needed inside the front end of the lens barrel, threadedly connected to the inner wall of the lens barrel to lock the lens elements in place. Furthermore, an adhesive dispensing machine is required for fixation.

[0003] The disadvantages of this objective lens assembly are: 1) The lenses are generally glass lenses, which are heavy, costly, and require a large locking force; 2) The front end of the lens barrel has a pressure ring inside, which is connected to the inner wall of the lens barrel by threads. It requires a dispensing machine for dispensing and fixing, which is complex in structure, requires high precision, has high mold opening cost, and has a complicated installation process. Summary of the Invention

[0004] The purpose of this utility model is to provide a night vision lens that solves the technical problems of existing technologies where lenses are generally glass lenses, which are heavy, costly, and require large locking forces; the front end of the lens barrel has a pressure ring that is threaded to the inner wall of the lens barrel, requiring a dispensing machine for glue fixation, resulting in a complex structure, high precision requirements, high mold costs, and complicated installation process.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A night vision lens includes a lens assembly, which includes a sleeve and a plurality of lenses installed inside the sleeve, wherein the plurality of lenses are all plastic lenses. The lens assembly is characterized by further including a cover, which includes an annular ring and a plurality of snap fasteners extending axially from the edge of the annular ring. The snap fasteners are circumferentially spaced. A groove is provided on the outer surface of the sleeve near its end. The annular ring is located at one end of the sleeve and presses against the plurality of lenses, and the snap fasteners engage with the groove.

[0007] Preferably, the slot is an annular groove.

[0008] Preferably, several baffles are circumferentially spaced between two adjacent buckles, and a notch is provided between the buckles and the baffles. The buckles and baffles form a circle around the outside of the sleeve.

[0009] Preferably, a through hole is provided on the annular ring at the position corresponding to the buckle, and the through hole is located on the radial inner side of the buckle.

[0010] Preferably, a lens barrel is fitted around the lens assembly, and a first threaded section is provided at the tail of the lens barrel for threaded connection to a flange. A second threaded section is also provided on the outer surface of the tail of the flange.

[0011] Preferably, the plurality of lenses include a first lens, a second lens, a third lens, and a fourth lens, which are installed in the sleeve from left to right. An annular ring is pressed on the outer surface of the first lens, and adjacent lenses are separated by spacers.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] Effect 1: The night vision lens of this utility model includes a lens assembly, which includes a sleeve and several lenses installed inside the sleeve. The several lenses are all plastic lenses, which are lightweight, low in cost, and require less locking force.

[0014] Effect 2: A slot is provided on the outer surface of the sleeve near the end. The cover is installed on the outside of the end of the sleeve. The cover includes an annular ring and several buckles extending axially from the edge of the annular ring. The buckles are circumferentially spaced. The annular ring is located at one end of the sleeve and presses against several lenses. The buckles engage with the slot. The structure is simple, the mold opening cost is low, and the installation and disassembly are convenient.

[0015] Other advantages of this invention will be described in more detail in the specification. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention from one angle;

[0017] Figure 2 This is a perspective view of the present invention from another angle;

[0018] Figure 3 This is an exploded view of the present invention;

[0019] Figure 4 This is a cross-sectional view of the structure of this utility model;

[0020] Figure 5 This is a cross-sectional view of the lens assembly of this utility model;

[0021] Figure 6 This is a perspective view of the card cover of this utility model from one angle;

[0022] Figure 7 This is a perspective view of the card cover of this utility model from another angle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example 1:

[0025] like Figures 1 to 7 As shown, this embodiment provides a night vision lens, including a lens assembly 100. The lens assembly 100 includes a sleeve 1 and a plurality of lenses 2 installed inside the sleeve 1. The plurality of lenses 2 are all plastic lenses. The feature is that it also includes a cover 3, which is installed on the outside of the end of the sleeve 1. The cover 3 includes an annular ring 31 and a plurality of buckles 32 extending axially from the edge of the annular ring 31. The plurality of buckles 32 are circumferentially spaced. A groove 11 is provided on the outer surface of the sleeve 1 near the end. The annular ring 31 is located at one end of the sleeve 1 and presses against the plurality of lenses 2. The plurality of buckles 32 are engaged with the groove 11. The specific technical effects are as follows: 1. All of the lenses are plastic lenses, which are lightweight, low in cost, and require less locking force; 2. A slot 11 is provided on the outer surface of the sleeve 1 near the end. The cover 3 is installed on the outside of the end of the sleeve 1. The cover 3 includes an annular ring 31 and several buckles 32 extending axially from the edge of the annular ring 31. The buckles 32 are circumferentially spaced. The annular ring 31 is located at one end of the sleeve 1 to press against several lenses 2. The buckles 32 are engaged with the slot 11. The structure is simple, the mold opening cost is low, and the installation and disassembly are convenient.

[0026] Preferably, the slot 11 is an annular slot, which has a simple structure and is easy to manufacture.

[0027] Preferably, several baffles 33 are circumferentially spaced between two adjacent buckles 32, and a notch 34 is provided between the buckles 32 and the baffles 33. The several buckles 32 and the several baffles 33 form a circle around the outside of the sleeve 1. The baffles 33 and the notch 34 increase the toughness of the joint between the buckle cover 3 and the sleeve 1.

[0028] Preferably, a through hole 35 is provided on the annular ring 31 at the position corresponding to the buckle 32. The through hole 34 is located on the radial inner side of the buckle 32. The through hole 35 facilitates the separation of the cover 3 from the mold when the mold is opened.

[0029] Preferably, the lens assembly 100 is fitted with a lens barrel 101, and the end of the lens barrel 101 is provided with a first threaded section 102, which is used to thread the flange 103. The outer surface of the end of the flange 103 is also provided with a second threaded section 104. The structure is simple and easy to install.

[0030] Preferably, the plurality of lenses 2 include a first lens 21, a second lens 22, a third lens 23 and a fourth lens 24. The first lens 21, the second lens 22, the third lens 23 and the fourth lens 24 are installed in the sleeve 1 from left to right. The annular ring 31 is pressed on the outer surface of the first lens 21. Adjacent lenses 2 are separated by spacers 4. The structure is simple and easy to install.

[0031] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. A night vision lens, comprising a lens assembly (100), the lens assembly (100) comprising a sleeve (1) and a plurality of lenses (2) mounted inside the sleeve (1), wherein the plurality of lenses (2) are all plastic lenses, characterized in that It also includes a cover (3), which is installed on the outside of the end of the sleeve (1). The cover (3) includes an annular ring (31) and several buckles (32) extending axially from the edge of the annular ring (31). The several buckles (32) are circumferentially spaced. A groove (11) is provided on the outer surface of the sleeve (1) near the end. The annular ring (31) is located at one end of the sleeve (1) and presses several lenses (2) together. The several buckles (32) are engaged with the groove (11).

2. A night vision lens according to claim 1, characterized in that: The slot (11) is an annular groove.

3. A night vision lens according to claim 1 or 2, characterized in that: Several baffles (33) are distributed circumferentially between two adjacent buckles (32), and a notch (34) is provided between the buckles (32) and the baffles (33). The buckles (32) and the baffles (33) form a circle around the outside of the sleeve (1).

4. A night vision lens according to claim 3, characterized in that: A through hole (35) is provided on the annular ring (31) at the position corresponding to the buckle (32), and the through hole (35) is located on the radial inner side of the buckle (32).

5. A night vision lens according to claim 4, characterized in that: The lens assembly (100) is fitted with a lens barrel (101), and the end of the lens barrel (101) is provided with a first threaded section (102), which is used to thread a flange (103). The outer surface of the end of the flange (103) is also provided with a second threaded section (104).

6. A night vision lens according to claim 4, characterized in that: Several lenses (2) include a first lens (21), a second lens (22), a third lens (23) and a fourth lens (24). The first lens (21), the second lens (22), the third lens (23) and the fourth lens (24) are installed in the sleeve (1) from left to right. An annular ring (31) is pressed on the outer surface of the first lens (21). Adjacent lenses (2) are separated by spacers (4).

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