Outer protective cover for medium-wave infrared continuous zoom lens
By designing the outer protective cover of the steel belt assembly and the pressure plate assembly, the problem of the cam structure of the mid-wave infrared continuous zoom lens is solved, effective protection of the lens inside is achieved, and the stability and reliability of the lens are improved.
Patent Information
- Application Number
- CN202323402637.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-13
AI Technical Summary
The cam structure of the mid-wave infrared continuous zoom lens is exposed to the outside, and the motion trajectory is not closed, resulting in susceptible to environmental influences such as light, dust, and moisture, affecting the accuracy and stability of the lens.
An external protective cover is designed including a steel belt assembly and a press plate assembly. There are round holes inside the steel belt assembly. The press plate assembly is assisted by the tooling to form a closed structure to protect the internal structure and adapt to the requirements of repeated disassembly and assembly.
Effectively blocking light, dust and moisture-proof, ensuring the stability and reliability of the lens' technical indicators, and improving the lens' enclosure and installation reliability.
Smart Images
Figure CN222167393U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aviation cameras, in particular to an outer protective cover for a medium-wave infrared continuous zoom lens. Background Art
[0002] Infrared continuous zoom lens has the functions of searching and tracking the target, and has the characteristics of good concealment, intuitive image, not easy to be interfered with, high precision, etc. It has been widely used and developed in military fields such as warning, reconnaissance, air defense and guidance. A certain medium-wave infrared continuous zoom lens uses a cam movement to control the focal length change. The cam movement trajectory is mechanically limited, and the cam needs to be assembled from the outside of the zoom lens barrel. Therefore, there is a situation where the cam structure is exposed outside the lens barrel and the cam movement trajectory is not closed. For this reason, we propose an outer protective cover for medium-wave infrared continuous zoom lens. Utility Model Content
[0003] The utility model aims to provide an outer protective cover for a medium-wave infrared continuous zoom lens to solve the problems raised in the above-mentioned background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an outer protective cover for a medium-wave infrared continuous zoom lens, comprising a steel belt assembly, and pressure plate assemblies located at both ends of the steel belt assembly;
[0005] The steel belt assembly includes a steel belt and tooling connected to both ends of the steel belt;
[0006] The pressure plate assembly includes an inner pressure plate and an outer pressure plate.
[0007] Preferably, a plurality of circular holes are provided inside the steel belt.
[0008] Compared with the prior art, the beneficial effects of the utility model are:
[0009] The utility model has a simple and beautiful structure, is easy to assemble and disassemble, can block stray light, prevent dust and moisture, and has a good protective effect on the internal structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of the structure of the steel belt assembly of the utility model;
[0011] Figure 2 This is a schematic diagram of the structure of the pressure plate assembly of the utility model.
[0012] In the figure: 1. Steel belt; 2. Tooling; 3. Inner pressure plate; 4. Outer pressure plate. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0014] like Figure 1 and Figure 2 As shown, an outer protective cover for a medium-wave infrared continuous zoom lens includes a steel belt assembly and pressure plate assemblies located at both ends of the steel belt assembly;
[0015] The steel belt assembly includes a steel belt 1 and a tooling 2 connected to both ends of the steel belt 1. A plurality of circular holes are opened inside the steel belt 1. The steel belt 1 is made of stainless steel, and its surface is black after electrophoresis, which can effectively block stray light. After the steel belt 1 is inspected and qualified by the tooling 2, the tooling 2 is used to assist in the installation of the pressure plate assembly. The left and right ends of the tooling 2 are designed as stepped types to facilitate the installation of the pressure plate assembly. Circular through holes are designed at both ends of the steel belt 1 to allow the screws connecting the inner and outer pressure plates to pass through, so as to facilitate the connection and fixation with the pressure plate assembly.
[0016] The pressure plate assembly includes an inner pressure plate 3 and an outer pressure plate 4. The tooling 2, the inner pressure plate 3 and the outer pressure plate 4 are made of aluminum alloy and are respectively installed at both ends of the steel belt 1 through the tooling 2. The countersunk screws pass through the circular holes of the steel belt 1 to connect the inner pressure plate 3 and the outer pressure plate 4 to each other. After the installation is completed, the hexagon socket screws are used to pass through the two groups of pressure plate assemblies to connect the steel belt 1 end to end to form a closed ring;
[0017] The cam movement of the medium-wave infrared continuous zoom lens is mechanically limited, so there will be a cam track movement groove on the lens barrel, and its internal slide rail and other motion mechanisms are required to have high precision to ensure the lens optical axis consistency, image quality stability and other technical indicators. In order to prevent the main technical indicators of the lens from being affected by dust, impurities, stray light, etc. in the external environment, the steel belt needs to be designed as a closed structure.
[0018] The steel belt 1 is wrapped around the outside of the cylindrical lens, so the two ends of the steel belt 1 need to be connected to each other, and at the same time, they should meet the requirements of repeated disassembly and assembly, and should also have a certain reliability after installation; therefore, a pressure plate assembly is designed, which is mainly composed of an inner pressure plate 3 and an outer pressure plate 4. The inner pressure plate 3 and the outer pressure plate 4 are connected by countersunk screws, and the countersunk screws pass through the round holes of the steel belt 1. After the screws are tightened, the structure can be connected end to end and the steel belt 1 can be compacted to ensure its reliability. The two sets of pressure plate assemblies are located at both ends of the steel belt 1 and have symmetrical structures. After the steel belt 1 is installed around the lens barrel, the pressure plate assemblies at both ends are connected by hexagon socket screws. Due to certain assembly errors in the actual zoom cam barrel, there are differences in the outer envelope of the infrared zoom lens assembly in the diameter direction. When the two ends of the stainless steel belt 1 are connected, the diameter of the circular shape formed can be adjusted according to the actual size, thereby ensuring that the movement of the zoom cam is not affected by resistance.
[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An outer protective cover for a medium-wave infrared continuous zoom lens, characterized in that: It includes a steel belt assembly and pressure plate assemblies located at both ends of the steel belt assembly; The steel belt assembly comprises a steel belt (1) and a tool (2) connected to both ends of the steel belt (1); The pressure plate assembly comprises an inner pressure plate (3) and an outer pressure plate (4).
2. The outer protective cover for a medium-wave infrared continuous zoom lens according to claim 1, characterized in that: A plurality of circular holes are provided inside the steel belt (1).