Focusing mechanism for short-distance optical camera

Abstract

The utility model discloses a focusing mechanism for a short-distance optical camera. The focusing mechanism comprises a camera module. The focusing ring is rotatably connected with the camera module, and a camera hole for camera shooting of the camera module is formed in the focusing ring; the horizontal placing part is arranged in the focusing ring and is positioned above the camera hole; the Chart drawing is horizontally arranged with a camera in the camera module after being arranged on the horizontal placing part, and the Chart drawing is in a size adaptive to short-distance focusing detection of the camera module after being reduced in an equal ratio; according to the utility model, the Chart drawing is reduced to a size adaptive to short-distance focusing detection of the camera module in an equal ratio, and then the Chart drawing is placed in the focusing ring, and then the camera module carries out short-distance focusing detection adaptive to a mobile phone camera on the Chart drawing through the focusing ring; meanwhile, the Chart drawing is horizontally placed on the horizontal placing part, the horizontal placing part and the camera in the camera module are horizontally arranged, it is ensured that the Chart drawing and the camera in the camera module are also horizontally arranged, and focusing is accurate, stable and reliable.

Description

Technical Field

[0001] The utility model relates to a focusing mechanism, in particular to a focusing mechanism for a short-distance optical camera. Background Art

[0002] Cameras are currently used in a wide range of applications, such as mobile phone photography, image recognition, monitoring, etc. At present, the number of image modules equipped in mobile phones has reached 3-4. Nowadays, the fingerprint recognition function under the mobile phone screen is developing rapidly. The fingerprint recognition under the screen includes two methods: ultrasonic fingerprint recognition and optical fingerprint recognition module.

[0003] Optical fingerprint recognition uses the camera image transmission function combined with OLED to realize fingerprint entry and recognition. The focusing image detection distance of the under-screen optical camera is subject to various restrictions on the thickness of the mobile phone, resulting in a very small distance for the camera module during production and focusing. Most of the distances in the industry are 2.5±5mm. Because of the small distance, the drawing size of the detection image is also very small. The existing camera module detection distances are 500mm, 300mm, 70mm, and 20mm. There are great differences in the size of the test distance, the range of the FOV used, and the focusing operation method. The existing minimum detection distance is at least 20mm. Therefore, the existing camera module cannot be applied to the short-distance focusing of the mobile phone optical camera, which has brought many adverse effects to the actual application. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and to provide a focusing mechanism for a short-distance optical camera, which can meet the short-distance focusing requirements of a mobile phone optical camera and is easy, labor-saving and accurate to operate.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a focusing mechanism for a short-distance optical camera, comprising:

[0006] Camera module;

[0007] A focus ring is rotatably connected to the camera module, and a camera hole for the camera module to shoot is opened on the focus ring;

[0008] A horizontal placement portion, arranged inside the focus ring and located above the camera hole;

[0009] A Chart drawing, wherein the Chart drawing is arranged on the horizontal placement portion and is arranged horizontally with the camera in the camera module, and the Chart drawing is proportionally reduced to a size suitable for short-distance focusing detection of the camera module;

[0010] When the focusing ring is rotated, the camera module is focused horizontally through the Chart drawing after passing through the horizontal placement portion from the camera hole.

[0011] Furthermore, the horizontal placement portion includes:

[0012] A transparent component is arranged in the accommodating cavity of the focus ring and is located above the camera hole, and the transparent component is arranged horizontally with the camera in the camera module;

[0013] A horizontal pressing component, wherein the horizontal pressing component is hollow, and the hollow of the horizontal pressing component is arranged correspondingly to the transparent component above and below, the horizontal pressing component is connected to the focusing ring, and the horizontal pressing component and the transparent component are arranged horizontally; wherein the Chart drawing is arranged horizontally above the hollow of the horizontal pressing component.

[0014] Furthermore, the transparent component is transparent glass.

[0015] Furthermore, the horizontal pressing component is arranged inside the focus ring through a plurality of locking screws.

[0016] Furthermore, a limiting groove for horizontally accommodating the Chart drawing sheet is formed on the upper surface of the horizontal pressing component.

[0017] Furthermore, the distance from the Chart drawing to the camera in the camera module is 2.5 to 5 mm.

[0018] Furthermore, the Chart drawing is in a circular shape.

[0019] Furthermore, the outer circumference of the focus ring is in a concave-convex shape.

[0020] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0021] The utility model relates to a focusing mechanism for a short-distance optical camera, which reduces a Chart drawing in proportion to a size suitable for short-distance focusing detection of a camera module and places the drawing in a focusing ring. Then, the camera module uses the focusing ring to adapt the Chart drawing to the short-distance focusing detection of a mobile phone camera. At the same time, by placing the Chart drawing horizontally on a horizontal placement portion, the horizontal placement portion and the camera in the camera module are arranged horizontally, ensuring that the Chart drawing and the camera in the camera module are also arranged horizontally, and the focusing is accurate, stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1A top view of an embodiment of the utility model;

[0024] Figure 2 This is an internal cross-sectional view of an embodiment of the utility model;

[0025] Figure 3 for Figure 1 The structural diagram after omitting the camera module;

[0026] Figure 4 A cross-sectional view of a focus ring in one embodiment of the utility model;

[0027] Among them: a camera module 1, a focus ring 2, a horizontal placement part 3, a chart drawing 4, a camera hole 20, a receiving cavity 21, a transparent component 30, and a horizontal pressing component 31. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0029] The utility model provides a focusing mechanism for a short-distance optical camera to solve the problem in the prior art that due to the small space of the mobile phone size, the focusing distance of the camera module is extremely small, between 2 and 5 mm, which leads to a small size of the inspection drawing, while the existing camera module focusing detection distance is at least more than 20 mm, thus being unable to adapt to the mobile phone camera for focusing detection.

[0030] For ease of understanding, the specific process in the embodiments of the present application is described below. Figures 1 to 3 A focusing mechanism for a short-distance optical camera in an embodiment of the present application comprises a camera module 1, a focusing ring 2, a horizontal placement portion 3 and a Chart drawing 4. The focusing ring 2 is rotatably connected to the camera module 1, and the focusing ring 2 is provided with a camera hole 20 for the camera module 1 to take pictures. The horizontal placement portion 3 is arranged inside the focusing ring 2 and is located above the camera hole 20. The Chart drawing 4 is arranged horizontally with the camera in the camera module 1 after being arranged on the horizontal placement portion 3, and the Chart drawing 4 is proportionally reduced to adapt to the size of the short-distance focusing detection of the camera module 1. When the focusing ring 2 is rotated, the camera module 1 is horizontally focused through the Chart drawing 4 after passing through the horizontal placement portion 3 from the camera hole 20.

[0031] The focusing mechanism for a short-distance optical camera of the utility model proportionally reduces a Chart drawing 4 to a size suitable for short-distance focusing detection of a camera module 1 and places the same inside a focusing ring 2. Then, the camera module 1 uses the focusing ring 2 to adapt the Chart drawing 4 to the short-distance focusing detection of a mobile phone camera. Meanwhile, the horizontal placement portion 3 ensures that the Chart drawing 4 and the camera in the camera module 1 are horizontally set, so that the focusing is accurate, stable and reliable.

[0032] based on Figures 2 to 4 In this embodiment, the horizontal placement part 3 includes a transparent component 30 and a horizontal pressing component 31. The transparent component 30 is arranged in the accommodating cavity 21 of the focusing ring 1 and is located above the camera hole 20, and the transparent component and the camera in the camera module are arranged horizontally. The horizontal pressing component 31 is arranged in contact with the upper surface of the transparent component 30 and is connected to the focusing ring 1. The horizontal pressing component 31 is hollow, and the center control of the horizontal pressing component 31 is arranged correspondingly to the transparent component 30 up and down. The horizontal pressing component 31 and the transparent component 30 are arranged horizontally, and the Chart drawing 4 is arranged horizontally above the hollow of the horizontal pressing component 31, so that the camera can perform post-shooting focusing operations on the Chart drawing 4 through the hollow of the camera hole 20, the transparent component 30 and the horizontal pressing component 31.

[0033] Secondly, in order to ensure horizontal focusing, the transparent component 30 in this embodiment is horizontally arranged with the camera, the horizontal pressing component 31 is horizontally arranged with the transparent component 30, and the Chart drawing 4 is horizontally arranged above the hollow of the horizontal pressing component 31, so that the Chart drawing 4 is also horizontally arranged with the camera in the camera module 1, ensuring that the Chart drawing 4 will not be skewed during focusing, so as to avoid affecting the result of being judged as a defective product.

[0034] In this embodiment, the transparent component 30 is transparent glass, and of course other materials may be used as long as the camera can pass through it to shoot the Chart drawing 4 .

[0035] In addition, the horizontal pressing component 31 is arranged inside the focus ring 2 through four locking screws, which is convenient and labor-saving to install.

[0036] At the same time, a limiting groove for accommodating the Chart drawing 4 is opened on the hollow upper surface of the horizontal pressing component 31, so that the Chart drawing 4 can be placed stably after being limited, and at the same time, the horizontal setting of the Chart drawing 4 and the camera is ensured.

[0037] based on Figure 2In this embodiment, the distance from the Chart drawing 4 to the camera in the camera module 1 can be controlled between 2.5 and 5 mm through the focusing mechanism, thereby satisfying the short-distance focusing detection of the mobile phone optical camera, and the detection distance can be adaptively adjusted according to actual needs.

[0038] In this embodiment, the Chart drawing 4 used for focusing is of a specific size. Since the distance between the camera and the Chart drawing 4 becomes closer, in order to ensure normal focusing, the Chart drawing 4 is proportionally reduced here, so as to adapt to the camera for corresponding focusing after shooting. At the same time, the shape of the Chart drawing 4 is circular, and the focusing ring 1 is also circular, so that it is convenient for the operator to rotate.

[0039] In addition, the outer circumference of the focus ring 2 is in a concave-convex surface, that is, in a wave shape, so that when it is manually held and rotated for focusing, the friction force can be increased, which is convenient for actual operation and use.

[0040] The specific steps are as follows:

[0041] 1) Confirm the focus distance specification, which refers to the distance from the camera surface to the surface of the chart drawing. After the distance is confirmed, the chart drawing is output, mainly for the corresponding proportional reduction;

[0042] 2) Place the Chart drawing on the horizontal pressing part through the limiting groove, then place the horizontal pressing part on the transparent part, and align the hollow of the horizontal pressing part with the transparent part, install the horizontal pressing part on the focusing ring, and finally ensure that the Chart drawing and the camera are set horizontally;

[0043] 3) Manually turn the focus ring, and then use the computer program to focus the chart to find the clearest resolution.

[0044] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A focusing mechanism for a short-range optical camera, characterized in that: include: Camera module; A focus ring is rotatably connected to the camera module, and a camera hole for the camera module to shoot is opened on the focus ring; A horizontal placement portion, arranged inside the focus ring and located above the camera hole; A Chart drawing, wherein the Chart drawing is arranged on the horizontal placement portion and is arranged horizontally with the camera in the camera module, and the Chart drawing is proportionally reduced to a size suitable for short-distance focusing detection of the camera module; When the focusing ring is rotated, the camera module is focused horizontally through the Chart drawing after passing through the horizontal placement portion from the camera hole.

2. The focusing mechanism for a short-distance optical camera according to claim 1, wherein: The horizontal placement portion comprises: A transparent component is arranged in the accommodating cavity of the focus ring and is located above the camera hole, and the transparent component is arranged horizontally with the camera in the camera module; A horizontal pressing component, wherein the horizontal pressing component is hollow, and the hollow of the horizontal pressing component is arranged correspondingly to the transparent component above and below, the horizontal pressing component is connected to the focusing ring, and the horizontal pressing component and the transparent component are arranged horizontally; wherein the Chart drawing is arranged horizontally above the hollow of the horizontal pressing component.

3. The focusing mechanism for a short-distance optical camera according to claim 2, wherein: The transparent component is transparent glass.

4. The focusing mechanism for a short-distance optical camera according to claim 2, wherein: The horizontal pressing component is arranged inside the focus ring through a plurality of locking screws.

5. The focusing mechanism for a short-distance optical camera according to claim 2, wherein: The upper surface of the horizontal pressing component is provided with a limiting groove for horizontally accommodating the Chart drawing.

6. The focusing mechanism for a short-distance optical camera according to claim 1, wherein: The distance from the Chart drawing to the camera in the camera module is 2.5~5mm.

7. The focusing mechanism for a short-distance optical camera according to claim 1, wherein: The Chart drawing is in a circular shape.

8. The focusing mechanism for a short-distance optical camera according to claim 1, wherein: The outer circumference of the focus ring is in a concave-convex surface shape.

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