Lens assembly convenient for focal length adjustment

Abstract

A lens assembly facilitating focal length adjustment comprises a lens shell, a first lens is arranged at one end of the lens shell, a first lens assembly is arranged in the lens shell, and a second lens is arranged in the first lens assembly. A second lens assembly which is in limiting fit with the first lens assembly and can be close to or far away from the first lens assembly is further arranged in the lens shell, and a third lens is arranged in the second lens assembly; the first lens assembly and the second lens assembly are arranged in the lens shell, the rotating wheel is arranged on the first lens assembly and penetrates through the lens shell, and the rotating wheel is in driving connection with the second lens assembly through a driving structure. And the second lens assembly drives the third lens to be close to or far away from the second lens through the driving structure, so that the focal length is changed.

Description

Technical Field

[0001] This utility model relates to the field of lenses, and more particularly to a lens assembly that facilitates focal length adjustment. Background Technology

[0002] With the continuous development and expansion of my country's manufacturing industry, it is now able to produce products that meet the needs of almost all consumers, such as mobile phones, small telescopes, smartwatches, computers and other products. As an important component of small telescopes, the focal length of the lens determines the distance and clarity that the telescope can observe. Since the focal length of existing telescopes is fixed, the distance and clarity of the view are limited, and the inability to adjust the focal length cannot meet the current needs of consumers. Utility Model Content

[0003] To address the aforementioned issues, this technical solution provides a lens assembly that facilitates focal length adjustment.

[0004] To achieve the above objectives, the technical solution is as follows:

[0005] A lens assembly for easy focal length adjustment includes a lens housing, a first lens at one end of the lens housing, a first lens assembly inside the lens housing, a second lens inside the first lens assembly, a second lens assembly inside the lens housing that is limited and cooperates with the first lens assembly and can be close to or away from the first lens assembly, and a third lens inside the second lens assembly.

[0006] It also includes a rotating wheel disposed on the first lens assembly and passing through the lens housing, the rotating wheel being driven to the second lens assembly via a drive structure.

[0007] In some embodiments, the drive structure includes a frame disposed on the first lens assembly, through which a screw passes, a wheel connected to the screw, and a threaded portion disposed on the second lens assembly, the threaded portion engaging with the screw.

[0008] In some embodiments, a limiting portion is provided at one end of the screw that passes through the frame.

[0009] In some embodiments, the first lens assembly has a slot, and the second lens assembly has an insertion portion that engages with the slot.

[0010] In some embodiments, the outer periphery of the wheel is provided with anti-slip texture.

[0011] The beneficial effects of this application are:

[0012] This application uses an externally exposed rotating wheel for user adjustment. By rotating the wheel, and through a drive structure, the second lens assembly moves the third lens closer to or further away from the second lens, thereby changing the focal length. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0014] Figure 1 This is an exploded structural diagram of an embodiment of the present invention;

[0015] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention. Detailed Implementation

[0016] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Please refer to Figure 1-2 As shown, a lens assembly that facilitates focal length adjustment includes a lens housing 1, a first lens 2 at one end of the lens housing 1, a first lens assembly 3 inside the lens housing 1, a second lens 4 inside the first lens assembly 3, a second lens assembly 5 inside the lens housing 1 that is limited and cooperates with the first lens assembly 3 and can be close to or away from the first lens assembly 3, and a third lens 6 inside the second lens assembly 5.

[0018] It also includes a rotating wheel 7 disposed on the first lens assembly 3 and passing through the lens housing 1, the rotating wheel 7 being driven to the second lens assembly 5 via a drive structure.

[0019] This application uses an externally exposed rotating wheel for user adjustment. By rotating the wheel, and through a drive structure, the second lens assembly moves the third lens closer to or further away from the second lens, thereby changing the focal length.

[0020] In this embodiment, the driving structure includes a frame 8 disposed on the first lens assembly 3, through which a screw 9 passes, and the rotating wheel 7 is connected to the screw 9. It also includes a threaded portion 10 disposed on the second lens assembly 5, which engages with the screw 9.

[0021] When the user rotates the dial, the dial will drive the screw to rotate. Due to the limiting fit between the first lens assembly and the second lens assembly, the screw thread and the threaded part fit together, forcing the second lens assembly to move outward or inward, thereby achieving the adjustment of the focal length.

[0022] In this embodiment, a limiting part 11 is provided at one end of the screw 9 that passes through the frame 8 to prevent the screw from detaching from the frame.

[0023] In this embodiment, the first lens assembly 3 is provided with a slot 12, and the second lens assembly 5 is provided with an insertion part 13 that cooperates with the slot 12, thereby playing a limiting role. Therefore, the second lens assembly can only be displaced in the horizontal direction relative to the first lens assembly.

[0024] In this embodiment, the outer circumference of the rotating wheel 7 is provided with anti-slip texture to provide a certain amount of friction, making it easier for the user to rotate the wheel.

[0025] The above description is only a preferred embodiment of this application and is not intended to limit the scope of implementation of this application. Any other embodiments whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. A lens assembly for easy focal length adjustment, characterized in that, The system includes a lens housing (1), one end of which is provided with a first lens (2), a first lens assembly (3) is provided inside the lens housing (1), a second lens (4) is provided inside the first lens assembly (3), and a second lens assembly (5) is also provided inside the lens housing (1) that is limited and cooperates with the first lens assembly (3) and can be close to or away from the first lens assembly (3), and a third lens (6) is provided inside the second lens assembly (5). It also includes a rotating wheel (7) disposed on the first lens assembly (3) and passing through the lens housing (1), the rotating wheel (7) being driven to the second lens assembly (5) via a drive structure.

2. The lens assembly for easy focal length adjustment according to claim 1, characterized in that: The drive structure includes a frame (8) disposed on the first lens assembly (3), through which a screw (9) passes, and a rotating wheel (7) is connected to the screw (9). It also includes a threaded portion (10) disposed on the second lens assembly (5), which engages with the screw (9).

3. A lens assembly for easy focal length adjustment according to claim 2, characterized in that: The screw (9) has a limiting part (11) at one end that passes through the frame (8).

4. A lens assembly for easy focal length adjustment according to claim 3, characterized in that: The first lens assembly (3) is provided with a slot (12), and the second lens assembly (5) is provided with an insertion part (13) that mates with the slot (12).

5. A lens assembly for easy focal length adjustment according to claim 1, characterized in that: The outer circumference of the wheel (7) is provided with anti-slip texture.

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