Optical element assembly structure and optical imaging device

Abstract

The utility model discloses an optical element assembly structure and an optical imaging device, and relates to the technical field of optics, the optical element assembly structure comprises an installation main body and a flexible pressing member, the installation main body is provided with an installation hole for installing an optical lens, the flexible pressing member is arranged in the installation hole, and the flexible pressing member is arranged on the installation main body. A plurality of contact parts are uniformly arranged on one side of the flexible downward pressing piece around the axis of the mounting hole at intervals, and in the specific mounting process, the plurality of first convex parts can perform downward pressing force application on the plurality of outward convex parts in the downward pressing process, so that the downward pressing contact surface is changed into a point contact downward pressing structure, the stress deformation of the optical lens can be reduced, and the optical lens can be more stable and reliable. Meanwhile, the requirement for the precision of the contact part of the elastic ring is relatively low, and in the downward pressing process of the pressing ring, the multiple first convex parts can be deformed through the multiple second convex parts, so that the downward pressing and fixing effect of the elastic ring on the optical lens is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optics, in particular to an optical element assembly structure and an optical imaging device. Background Art

[0002] Optical lenses are the most fundamental and important structural components in optical equipment. There are generally two ways to install and secure them in a lens. The first is to glue them together, which requires applying glue before installation and is not a simple process. Another method is to press down on them with a retaining ring. With this method, we've found that the manufacturing tolerances of the retaining ring, mounting parts, and lens significantly impact the accuracy of the lens after assembly. During the pressing process of the retaining ring, the installation stress causes strain in the optical element, resulting in deformation. For reflectors, this deformation is reflected in the reflected light, reducing the accuracy of the entire lens. Utility Model Content

[0003] The main purpose of the utility model is to provide an optical element assembly structure and an optical imaging device, which aims to solve the problem that the traditional optical lens installation method is not convenient enough and easily causes deformation of the optical lens.

[0004] To achieve the above-mentioned purpose, the optical element assembly structure proposed in the present invention includes:

[0005] A mounting body, wherein the mounting body is provided with a mounting hole for mounting an optical lens; and

[0006] A flexible pressing member is arranged in the mounting hole, and a plurality of contact portions are evenly spaced around the axis of the mounting hole on one side of the flexible pressing member for contacting and pressing down one side of the optical lens.

[0007] In one embodiment, a limiting ring portion extends from the edge of one end of the mounting hole radially inwardly along its circumference, and a plurality of protrusions extend from the limiting ring portion at even intervals along the axial direction of the mounting hole. The plurality of protrusions are used to limit one end of the optical lens.

[0008] In one embodiment, the flexible pressing member includes an elastic ring and a pressure ring, wherein the elastic ring is arranged between the optical lens and the pressure ring, and the elastic ring is arranged in a wave shape, with a plurality of first convex portions corresponding to the plurality of outer convex portions formed on one side thereof, and a plurality of second convex portions formed on the other side thereof, and the pressure ring contacts and presses downward with the plurality of second convex portions;

[0009] The plurality of first protrusions correspondingly form a plurality of contact portions.

[0010] In one embodiment, a guide structure is provided between the elastic ring and the mounting hole, and the guide structure is used to limit the elastic ring to guide movement along the axis direction of the mounting hole.

[0011] In one embodiment, the guide structure includes a slide groove portion and a protrusion portion, the slide groove portion extends inward along the axial direction of the mounting hole from the edge of one end of the mounting hole away from the limiting ring portion, and the protrusion portion is arranged on the arc-shaped peripheral wall of the elastic ring, and the protrusion portion is slidably installed on the inner side of the slide groove portion so that multiple first protrusions correspond to multiple external protrusions.

[0012] In one embodiment, the number of the plurality of outer protrusions and the number of the plurality of first protrusions are both at least three.

[0013] In one embodiment, the end section of the slide groove portion is arc-shaped, and the other end of the slide groove portion extends to an end surface of the limiting ring portion corresponding to the interior of the mounting hole.

[0014] In one embodiment, the outer diameters of the elastic ring and the pressure ring are the same, and the outer diameters of the elastic ring and the pressure ring are set corresponding to the inner diameter of the mounting hole.

[0015] In one embodiment, the elastic ring and the pressure ring are both made of metal.

[0016] The present invention further provides an optical imaging device, the optical imaging device comprising an optical element assembly structure, the optical element assembly structure comprising:

[0017] A mounting body, wherein the mounting body is provided with a mounting hole for mounting an optical lens; and

[0018] A flexible pressing member is arranged in the mounting hole, and a plurality of contact portions are evenly spaced around the axis of the mounting hole on one side of the flexible pressing member for contacting and pressing down one side of the optical lens.

[0019] In the technical solution of the present invention, under the premise of traditional downward pressure fixation, the traditional clamping ring structure is replaced by a flexible downward pressure part, and the traditional contact downward pressure fixation of the entire plane is changed to a multi-point contact fixing method. Through the flexible downward pressure of point contact, in the specific installation process, first, the multiple first protrusions can apply downward pressure on the multiple outer protrusions during the downward pressure process, so that the downward pressure contact surface is also changed to a point contact downward pressure structure, which can reduce the stress deformation of the optical lens. At the same time, the precision requirement for the contact part of the elastic ring is relatively low. Second, in the process of pressing the pressure ring, the multiple first protrusions can be deformed through the multiple second protrusions, thereby increasing the downward pressure and fixing effect of the elastic ring on the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the optical element assembly structure provided by the utility model;

[0022] Figure 2 for Figure 1 A side view schematic diagram of the optical element assembly structure provided in;

[0023] Figure 3 for Figure 1 Schematic diagram of the structure of the installation body;

[0024] Figure 4 for Figure 1 Schematic diagram of the structure of the elastic ring.

[0025] Description of Figure Numbers:

[0026] 100. Optical element assembly structure; 1. Mounting body; 11. Mounting hole; 12. Limiting ring portion; 13. Outer convex portion; 2. Elastic ring; 21. First convex portion; 22. Second convex portion; 3. Pressing ring; 4. Guide structure; 41. Slide groove portion; 42. Protrusion portion.

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Optical lenses are the most fundamental and important structural components in optical equipment. There are generally two ways to install and secure them in a lens. The first is to glue them together, which requires applying glue before installation and is not a simple process. Another method is to press down on them with a retaining ring. With this method, we've found that the manufacturing tolerances of the retaining ring, mounting parts, and lens significantly impact the accuracy of the lens after assembly. During the pressing process of the retaining ring, the installation stress causes strain in the optical element, resulting in deformation. For reflectors, this deformation is reflected in the reflected light, reducing the accuracy of the entire lens.

[0032] The present invention proposes an optical element assembly structure 100 to solve the above problems.

[0033] See also Figures 1 to 4In one embodiment of the present invention, the mounting structure of the optical element is mainly aimed at the installation of optical lenses. The traditional installation methods of optical lenses are generally divided into adhesive fixing methods and downward pressing fixing methods. The adhesive fixing method requires pre-applying glue on the mounting parts. Most of the mounting parts of optical lenses are hole-mounted mounting structures, and pre-applying glue on the inner side of the sunken mounting holes is required. This operation method is not convenient enough and it is difficult to control the amount of glue applied, which may affect the surface of the lens. The other is a downward pressing fixing method, in which the optical lens is pressed down and fixed in the sunken mounting hole of the mounting part through a circular retaining ring. Because this fixing method is hard contact, it has certain requirements on the accuracy of the mounting part and the retaining ring. When the accuracy of the mounting part and the retaining ring is not enough, the force on the optical lens will be uneven. When pressing down and fixing, it is easy to cause deformation of the optical lens after installation. At this time, it will have a certain impact on the light path, thereby affecting the overall accuracy of the entire lens during use. In order to solve the above problems in this embodiment, under the premise of traditional downward pressure fixation, the traditional clamping ring structure is replaced with a flexible downward pressure part, and the traditional entire plane contact downward pressure fixation is changed to a multi-point contact fixing method. Through the flexible downward pressure of point contact, the stress deformation of the optical lens after installation can be effectively reduced, and the optical lens can have better centering.

[0034] During specific installation, a limiting structure is provided at one end of the mounting hole 11 of the mounting body 1 for limiting one end of the optical lens, thereby preventing the optical lens from falling out of the mounting hole 11 during the downward pressing installation process. Specifically, a limiting ring portion 12 extends inwardly along the circumferential edge of the mouth edge of one end of the mounting hole 11, and at the same time, a plurality of outer protrusions 13 are extended from the limiting ring portion 12 along the axial direction of the mounting hole 11 at even intervals. Combined with the specific drawings, it can be seen that after the optical lens is installed in the mounting hole 11, one end side of the optical lens can be limited by the plurality of outer protrusions 13, thereby preventing it from falling outward from the opening of one end of the mounting hole 11, and then one side of the optical lens is contacted and pressed down by the plurality of contact portions on one side of the flexible pressing member. Compared with the traditional surface contact limiting method, this point contact limiting method not only has a good fixing effect, but also has lower manufacturing precision requirements for the contact surface of the mounting member in this embodiment. At the same time, due to the reduction of the contact surface, it is more conducive to the centering of the optical lens.

[0035] Among them, the most important flexible downward pressing parts include an elastic ring 2 and a pressure ring 3. The elastic ring 2 is the main flexible fixing part, which is a thin sheet structure and has a certain plasticity. After the optical lens is installed, the elastic ring 2 is installed, and then the pressure ring 3 is installed. The pressure ring 3 applies a certain downward pressure to the elastic ring 2, so that the optical lens can maintain a good fixed posture at multiple protrusions 13. Most importantly, the elastic ring 2 is arranged in a wave shape, with multiple first convex parts 21 corresponding to the multiple outer convex parts 13 formed on one side (corresponding to the above-mentioned contact parts), and multiple second convex parts 22 formed on the other side. The pressure ring 3 contacts and presses down with the multiple second convex parts 22. Such an arrangement can achieve the following technical effects: first, the multiple first convex parts 21 can apply downward force to the multiple outer convex parts 13 during the pressing process, so that the pressing contact surface is also changed to a point contact pressing structure, which can reduce the stress deformation of the optical lens. At the same time, the precision requirements of the contact part of the elastic ring 2 are relatively low. Second, in the process of pressing down the pressure ring 3, the multiple first convex parts 21 can be deformed by the multiple second convex parts 22, thereby increasing the pressing and fixing effect of the elastic ring 2 on the optical lens.

[0036] In order to ensure that after the elastic ring 2 is installed, the multiple first protrusions 21 can correspond one-to-one with the multiple outer protrusions 13, a guide structure 4 is provided between the elastic ring 2 and the mounting hole 11. When the elastic ring 2 is installed, the guide structure 4 can enable the elastic ring 2 to move along the axial direction of the mounting hole 11 during the installation process, thereby limiting the rotation of the elastic ring 2 during the installation process, so that the multiple first protrusions 21 correspond to the multiple outer protrusions 13, thereby increasing the convenience of the installation process of the elastic ring 2.

[0037] The guide structure 4 includes a groove portion 41 and a protrusion 42 , and the elastic ring 2 is guided and installed in the groove portion 41 by the protrusion 42 , thereby limiting the movement of the elastic ring 2 along the axial direction of the mounting hole 11 during the installation process.

[0038] Among them, the multiple outer protrusions 13 and the multiple first protrusions 21 are set to at least three. After being set to at least three, the optical lens can be prevented from warping when installing, and the stability of the optical lens after installation can be improved as much as possible to avoid swinging inside the installation hole 11 after installation.

[0039] The cross-sectional shape of the slide groove portion 41 is set to be an arc groove, and its extension length extends from the end away from the outer protrusion 13 to the end position of the limiting ring portion 12 facing inward. It is set to be an arc groove mainly to increase the contact surface of the guiding movement. The length of the slide groove portion 41 is long, which can provide sufficient movement distance for the elastic ring 2 as much as possible.

[0040] In this embodiment, the outer diameter values of the elastic ring 2 and the pressure ring 3 are set to be consistent, and the outer diameters of the elastic ring 2 and the pressure ring 3 correspond to the inner diameter of the mounting hole 11, so that the elastic ring 2 and the pressure ring 3 can be slidably installed on the inner wall of the mounting hole 11 as much as possible during the installation process. On the one hand, the entire installation structure can be made more compact, and on the other hand, the stability of the elastic ring 2 and the pressure ring 3 during the installation process can be improved.

[0041] The elastic ring 2 and the pressure ring 3 are both made of metal materials. The elastic ring 2 is similar to the shrapnel structure of a shrapnel ring. Made of metal material, it can not only suppress the stress caused by temperature without the need to specially use low-temperature deformation materials, but also compensate for certain stress unevenness caused by manufacturing tolerances.

[0042] The present invention also proposes an optical imaging device, which includes an optical element assembly structure 100. The optical element assembly structure 100 refers to the above embodiment. Since the optical imaging device includes the above optical element assembly structure 100, it has the beneficial technical effects of the above embodiment, which will not be described here one by one.

[0043] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An optical element assembly structure for installing optical lenses, characterized in that: include: A mounting body, wherein the mounting body is provided with a mounting hole for mounting an optical lens; and A flexible pressing member is arranged in the mounting hole, and a plurality of contact portions are evenly spaced around the axis of the mounting hole on one side of the flexible pressing member for contacting and pressing down one side of the optical lens.

2. The optical element assembly structure according to claim 1, wherein: A limiting ring portion extends from the edge of one end of the mounting hole along its circumferential inner side, and a plurality of protrusions extend from the limiting ring portion at even intervals along the axial direction of the mounting hole. The plurality of protrusions are used to limit one end of the optical lens.

3. The optical element assembly structure according to claim 2, wherein: The flexible pressing member includes an elastic ring and a pressure ring. The elastic ring is arranged between the optical lens and the pressure ring. The elastic ring is arranged in a wave shape. One side of the elastic ring is formed with a plurality of first convex portions corresponding to the plurality of outer convex portions, and the other side of the elastic ring is formed with a plurality of second convex portions. The pressure ring contacts and presses downward with the plurality of second convex portions. The plurality of first protrusions correspondingly form a plurality of contact portions.

4. The optical element assembly structure according to claim 3, wherein: A guide structure is provided between the elastic ring and the mounting hole, and the guide structure is used to limit the elastic ring to guide movement along the axis direction of the mounting hole.

5. The optical element assembly structure according to claim 4, wherein: The guide structure includes a slide groove portion and a protrusion portion. The slide groove portion extends inward along the axial direction of the mounting hole from the edge of one end portion of the mounting hole away from the limiting ring portion. The protrusion portion is arranged on the arc-shaped peripheral wall of the elastic ring. The protrusion portion is slidably installed on the inner side of the slide groove portion so that multiple first protrusions correspond to multiple outer protrusions.

6. The optical element assembly structure according to claim 5, wherein: The number of the plurality of outer protrusions and the number of the plurality of first protrusions are both at least three.

7. The optical element assembly structure according to claim 5, wherein: The end section of the slide groove portion is arranged in an arc shape, and the other end of the slide groove portion extends to an end surface of the limiting ring portion corresponding to the inside of the mounting hole.

8. The optical element assembly structure according to claim 3, wherein: The outer diameters of the elastic ring and the pressure ring are the same, and the outer diameters of the elastic ring and the pressure ring are set corresponding to the inner diameter of the mounting hole.

9. The optical element assembly structure according to claim 3, wherein: The elastic ring and the pressure ring are both made of metal.

10. An optical imaging device, characterized in that: The optical element assembly structure comprises the optical element assembly structure according to any one of claims 1 to 9.

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