CN214675306U

CN214675306U - Accurate focusing device

Info

Publication number: CN214675306U
Application number: CN202120478933.7U
Authority: CN
Inventors: 时强
Original assignee: Shanghai Qianyan Technology Co ltd
Current assignee: Shanghai Qianyan Technology Development Co.,Ltd.
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-11-09
Anticipated expiration: 2031-03-05

Abstract

The utility model discloses a precise focusing device, which comprises a focusing system, an imaging lens group, a machine body, a camera module, an upper shell, an imaging picture frame and a focusing cylinder, wherein the imaging picture frame is sleeved at the far end of the machine body; the focusing barrel is sleeved at the far end of the machine body and fixedly connected with the field of view, at least one protruding structure is arranged on the outer side of the imaging frame, external threads screwed with the focusing barrel are arranged on the outer side of the protruding structure, a guide groove matched with the protruding structure is formed in the far end of the machine body, the imaging lens group is directly driven by the screw thread structure to move, the transmission error between the structures is reduced, the imaging lens group is directly driven by the screw thread structure to move, and the influence error of external force on the material is reduced.

Description

Accurate focusing device

Technical Field

The utility model relates to an imaging lens field especially relates to an accurate focusing device.

Background

In the field of imaging lenses, an existing image acquisition module includes an imaging lens group, an image acquisition chip, and a circuit board of a required peripheral circuit. The assembly block is also called a camera module. And the definition to every module formation of image of making a video recording needs the light path position between adjustment formation of image lens group and the module of making a video recording, consequently, formation of image lens group need focus to obtain high-quality formation of image effect.

When the imaging lens group is focused, only when the distance from the lens group to the image acquisition chip is equal to the focal length of the lens, and when the light beam acquired by the lens is just vertical to the target surface of the imaging acquisition chip, the imaging acquisition chip can acquire a clear image. The distance from the lens group to the imaging acquisition chip and the angle from the light beam to the target surface of the photosensitive chip both need very accurate data. Slight deviations between these two data and the ideal data can have a great influence on the final imaging definition.

The distance between the imaging lens group and the image acquisition chip is adjusted by adopting a spring during focusing of the conventional imaging lens group at present, and the imaging lens group is pushed to move by the acting force of the spring. The focusing mode of the spring is not accurate, and the requirement on an operation method is high.

Therefore, a reliable and accurate focusing method is very important for the imaging effect.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides an accurate focusing device aims at solving and adopts spring mode focusing design, and the spring receives external force to influence to have elastic change, and formation of image lens group and image acquisition chip's focus change lead to the unstable problem of formation of image effect.

In order to solve the technical problem, the utility model provides a following technical scheme: an accurate focusing device comprises a focusing system, an imaging lens group, a machine body, a camera shooting module, an upper shell, an imaging lens frame and a focusing barrel, wherein the imaging lens frame is sleeved at the far end of the machine body; the focusing barrel is sleeved at the far end of the machine body and fixedly connected with the visibility ring, at least one protruding structure is arranged on the outer side of the imaging mirror frame, external threads screwed with the focusing barrel are arranged on the outer side of the protruding structure, and a guide groove matched with the protruding structure is formed in the far end of the machine body.

As a preferred technical scheme of the utility model, the focusing system comprises a focusing barrel, a pressing ring and a visibility ring; the imaging lens group is arranged in the imaging lens frame; the imaging lens group is composed of a plurality of lenses, and the imaging lens group is sleeved in the imaging lens frame to form a light path.

As a preferred technical solution of the present invention, the camera module is composed of an image acquisition chip, a circuit board, and a bracket, and is fixed by mechanical connection; the visibility ring pressing ring is sleeved at the far end of the machine body.

As an optimized technical scheme of the utility model, the width of guide way is the same with protruding structure's width, the external screw thread is fine thread.

As an optimal technical scheme of the utility model, the module of making a video recording is installed at the fuselage near-end and is fixed inside the fuselage through the epitheca.

Compared with the prior art, the utility model discloses the beneficial effect that can reach is:

1. the imaging lens group is directly driven by the screw structure to move, so that the transmission error between the structures is reduced, and the error of the material influenced by external force is reduced;

2. the fine pitch structure moves stably, the distance between the imaging lens group and the image acquisition chip can be controlled accurately, the fine pitch has self-locking performance, and the imaging lens group cannot move after being adjusted.

Drawings

FIG. 1 is a schematic view of a three-dimensional structure of a focusing device of the present invention;

FIG. 2 is an exploded view of the focusing apparatus of the present invention;

FIG. 3 is a schematic view of the cross-sectional structure of the focusing device of the present invention;

fig. 4 is a schematic view of a part of an enlarged structure at a in fig. 3 according to the present invention.

Wherein: 1. a focusing barrel; 2. a body; 3. an upper shell; 4. an imaging lens group; 5. a raised structure; 6. an imaging mirror frame; 7. a circle of visibility; 8. pressing a ring; 9. a guide groove; 10. an image acquisition chip; 11. the camera module.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the invention easy to understand, the invention is further explained below with reference to the specific embodiments, but the following embodiments are only the preferred embodiments of the invention, not all. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Examples

Referring to fig. 1-4, the present invention provides an accurate focusing apparatus, which includes a focusing system, an imaging lens set 4, a body 2, a camera module 11, and an upper shell 3, wherein the focusing system includes a focusing barrel 1, a pressing ring 8, and a diopter ring 7; the imaging lens group 4 is arranged in the imaging lens frame 6; the imaging lens group 4 consists of a plurality of lenses, and the imaging lens group 4 is sleeved in the imaging lens frame 6 to form a light path; the camera module 11 consists of an image acquisition chip 10, a circuit board and a bracket and is fixed through mechanical connection; the visibility ring 7 is sleeved at the far end of the machine body 2 through a pressing ring 8; the imaging lens frame 6 is sleeved at the far end of the machine body 2; the focusing barrel 1 is sleeved at the far end of the machine body 2 and is fixedly connected with the diopter ring 7; the camera module 11 is arranged at the near end of the machine body 2 and is fixed in the machine body 2 through the upper shell 3;

as a further embodiment of this embodiment, as shown in fig. 2, the guide slot 9 at the distal end of the body 2 is configured to limit the movement of the imaging lens frame 6 along the guide slot 9; the far end of the imaging lens frame 6 is provided with at least one convex structure 5, and the width of the convex structure is matched with the guide groove 9; the protruding structure 5 is provided with an outer screw thread structure and is matched with the inner screw thread of the focusing cylinder 1.

As a further embodiment of the present embodiment, as shown in fig. 2, the pressing ring 8 is fixedly connected to the body 2, and the position of the visibility ring 7 moving in the axial direction of the body 2 is limited.

As a further embodiment of the present embodiment, as shown in fig. 2, the projection structure 5 of the imaging lens frame 6 is fitted along the guide groove 9 of the body 2; the camera module 11 is fixed in the machine body 2 through mechanical connection; the focusing cylinder 1 is sleeved at the far end of the machine body 2 through the screw thread matching of the inner screw thread convex structure 5; the eye ring 7 is screwed into the focusing barrel 1 through a screw thread, and the pressing ring 8 limits the axial movement of the focusing barrel 1.

As a further implementation manner of this embodiment, as shown in fig. 2, the focusing system is sleeved at the distal end of the body 2 and is axially fixed; when the focusing system rotates, the outer screw thread of the boss structure 5 is driven by the inner screw thread of the focusing cylinder 1 to move; the imaging lens frame 6 moves to drive the imaging lens group 4 to move, and the distance between the imaging lens group 4 and the image acquisition chip 10 is adjusted; the imaging lens frame 6 is driven by the screw threads in the focusing barrel 1 to move linearly, so that the positions of the imaging lens group 4 and the image acquisition chip 10 can be accurately controlled.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an accurate focusing device, includes focusing system, formation of image lens group (4), fuselage (2), makes a video recording module (11), epitheca (3), formation of image picture frame (6), focusing barrel (1), its characterized in that: the imaging mirror frame (6) is sleeved at the far end of the machine body (2); focusing section of thick bamboo (1) cover is established at fuselage (2) distal end and is connected fixedly with diopter circle (7), the outside of formation of image picture frame (6) has at least one protruding structure (5), just the outside of protruding structure (5) is equipped with the external screw thread that closes soon with focusing section of thick bamboo (1), the distal end of fuselage (2) is seted up with protruding structure (5) matched with guide way (9).

2. A fine focus adjustment apparatus as claimed in claim 1, wherein: the focusing system comprises a focusing barrel (1), a pressing ring (8) and a visibility ring (7); the imaging lens group (4) is arranged in the imaging lens frame (6); the imaging lens group (4) is composed of a plurality of lenses, and the imaging lens group (4) is sleeved in the imaging mirror frame (6) to form a light path.

3. A fine focus adjustment apparatus as claimed in claim 2, wherein: the camera module (11) consists of an image acquisition chip (10), a circuit board and a bracket and is fixed through mechanical connection; the visibility ring (7) is sleeved at the far end of the machine body (2) through a pressing ring (8).

4. A fine focus adjustment apparatus as claimed in claim 1, wherein: the width of the guide groove (9) is the same as that of the protruding structure (5), and the external thread is a fine thread.

5. A fine focus adjustment apparatus as claimed in claim 3, wherein: the camera module (11) is installed at the near end of the machine body (2) and fixed inside the machine body (2) through the upper shell (3).