CN220137473U - Lens structure - Google Patents

Abstract

The utility model belongs to the technical field of optical lenses, and discloses a lens structure, which comprises a lens barrel, a first lens group and a positioning assembly, wherein the lens barrel comprises a first barrel part, and a positioning hole is formed in the side wall of the first barrel part along the radial direction; the first lens group is arranged on the first cylinder part in a sliding way along the axial direction of the first cylinder part; the positioning assembly penetrates through the positioning hole and is abutted to the first mirror group. According to the lens structure provided by the utility model, the positioning assembly is used for penetrating the positioning hole and abutting against the first lens group, so that the first lens group can slide along the axial direction of the first cylinder part, and meanwhile, the radial displacement of the first lens group along the first cylinder part is effectively prevented, and further, the imaging offset caused by the fit clearance between the first lens group and the first cylinder part is effectively prevented.

Description

Lens structure

Technical Field

The present disclosure relates to optical lenses, and particularly to a lens structure.

Background

"Smart manufacturing" is one of the important developments in automated manufacturing, and machine vision is used widely in automated production in various industries as "eyes" for "Smart manufacturing", such as industrial lenses. With the continuous development of the manufacturing industry, automated manufacturing is increasingly being applied to the production of more precise products, but the more precise products have higher performance requirements for visual identification.

In the prior art, industrial lenses are generally lenses made of metal, that is, the components of the lenses are mostly made of metal, and because of inherent focusing properties of the lenses, gaps for actions need to be reserved among the metal components, clearance fit is adopted among part of the metal components. Under different pose states, due to the influence of gravity, the gaps among the metal components can possibly cause displacement among the metal components, so that the lens generates imaging offset, visual identification is influenced, and the stability of the lens is poor.

Therefore, a lens structure is needed to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide a lens structure which can effectively prevent imaging offset caused by fit clearance.

To achieve the purpose, the utility model adopts the following technical scheme:

provided is a lens structure including:

the lens barrel comprises a first barrel part, and a positioning hole is formed in the side wall of the first barrel part along the radial direction;

the first lens group is arranged on the first cylinder part in a sliding way along the axial direction of the first cylinder part;

the positioning assembly penetrates through the positioning hole and is abutted to the first mirror group.

Optionally, the positioning assembly includes:

the ball is arranged in the positioning hole and is abutted against the first mirror group;

the pressurizing piece is arranged in the positioning hole in a penetrating way and can move along the positioning hole;

and an elastic member disposed between the ball and the pressing member, the elastic member configured to provide a force with which the ball presses the first mirror group in a radial direction of the first cylinder portion.

Optionally, the positioning hole includes a first hole portion, the first hole portion is sleeved with the pressing member, and the pressing member is in threaded connection with the first hole portion.

Optionally, the positioning hole includes a second hole portion, the second hole portion is located at one end of the first hole portion facing the first lens group, the ball is disposed in the second hole portion, and radial positioning of the ball along the second hole portion can be achieved through the second hole portion.

Optionally, a sinking groove is disposed at one end of the positioning hole facing away from the first mirror group.

Optionally, an accommodating groove is formed in one end, facing the ball, of the pressing piece, a first end of the elastic piece is arranged in the accommodating groove, and a second end of the elastic piece is abutted to the ball.

Optionally, an operation part is disposed at an end of the pressing member facing away from the ball, and the pressing member can be moved along the positioning hole by operating the operation part.

Optionally, the operation part is two U-shaped grooves which are oppositely arranged along the radial direction of the pressurizing piece, or the operation part is a straight groove, or the operation part is a cross groove.

Optionally, the lens barrel further comprises a second lens group, the second barrel and the first barrel are respectively located at two opposite end parts of the lens barrel, and the second lens group is fixedly arranged in the second barrel.

Optionally, the positioning holes include a plurality of first positioning holes arranged at intervals along the axial direction of the first barrel part, and each first positioning hole is internally penetrated by one positioning assembly; and/or

The locating holes comprise a plurality of second locating holes which are arranged at intervals along the circumferential direction of the first cylinder part, and each second locating hole is internally penetrated with one locating component.

The utility model has the beneficial effects that:

according to the lens structure provided by the utility model, the positioning assembly is used for penetrating the positioning hole and abutting against the first lens group, so that the first lens group can slide along the axial direction of the first cylinder part, and meanwhile, the radial displacement of the first lens group along the first cylinder part is effectively prevented, and further, the imaging offset caused by the fit clearance between the first lens group and the first cylinder part is effectively prevented.

Drawings

Fig. 1 is a schematic structural diagram of a lens structure provided by the present utility model;

FIG. 2 is a partial cross-sectional view of a first barrel portion provided by the present utility model;

FIG. 3 is a schematic view of a positioning assembly according to the present utility model;

FIG. 4 is a schematic view of another view of the positioning assembly according to the present utility model;

FIG. 5 is a schematic view of an arrangement of alignment holes provided by the present utility model;

FIG. 6 is a schematic view of another arrangement of alignment holes provided by the present utility model;

FIG. 7 is a cross-sectional view of a first mirror group provided by the present utility model;

fig. 8 is a cross-sectional view of the present utility model at a second barrel portion.

In the figure:

100. a lens barrel; 110. a first cylinder portion; 111. positioning holes; 1111. a first hole portion; 1112. a second hole portion; 1113. sinking grooves; 111a, first positioning holes; 111b, second positioning holes; 120. a second cylinder portion; 121. a second retainer ring portion;

200. a first mirror group; 210. a lens group barrel; 211. a first retainer ring portion; 220. a first lens; 230. a first retainer ring;

300. a positioning assembly; 310. a ball; 320. a pressurizing member; 321. a receiving groove; 322. an operation unit; 330. an elastic member;

400. a second mirror group;

500. and a second check ring.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1, the present embodiment provides a lens structure including a lens barrel 100, a first lens group 200, and a positioning assembly 300.

Specifically, the lens barrel 100 includes a first barrel portion 110, and a positioning hole 111 is radially formed in a sidewall of the first barrel portion 110; the first lens group 200 is slidably disposed along the axial direction of the first cylinder 110 and penetrates the first cylinder 110; the positioning assembly 300 is disposed through the positioning hole 111 and abuts against the first lens group 200. The first barrel 110 and the first lens group 200 are in clearance fit with each other through a shaft hole, so that the first lens group 200 can slide smoothly relative to the first barrel 110.

Illustratively, the material of the lens barrel 100 may be a metal material.

In the present embodiment, the positioning assembly 300 is inserted through the positioning hole 111 and abuts against the first lens group 200, so that the first lens group 200 can slide along the axial direction of the first barrel 110, and meanwhile, the first lens group 200 is effectively prevented from being displaced along the radial direction of the first barrel 110, and further, the imaging offset caused by the fit gap between the first lens group 200 and the first barrel 110 is effectively prevented.

In the present embodiment, referring to fig. 1 to 4, the positioning assembly 300 includes a ball 310, a pressing member 320, and an elastic member 330. The ball 310 is disposed in the positioning hole 111 and abuts against the first mirror group 200; the pressing piece 320 is arranged through the positioning hole 111 in a penetrating way and can move along the positioning hole 111; the elastic member 330 is disposed between the balls 310 and the pressing member 320, and the elastic member 330 is configured to provide a force with which the balls 310 press the first mirror group 200 in a radial direction of the first cylinder 110. Specifically, the pressing member 320 is movable along the positioning hole 111, and it is understood that the pressing member 320 is movable in the radial direction of the first cylinder 110. In the present embodiment, when the first lens group 200 slides along the axial direction of the first barrel 110, the ball 310 rotates along with the first barrel, so that the first lens group 200 slides smoothly; the position of the pressing member 320 relative to the positioning hole 111 is adjusted to adjust the force applied to the ball 310 by the elastic member 330, so that the force of the ball 310 pressing the first lens group 200 does not cause unsmooth sliding of the first lens group 200, and simultaneously, the first lens group 200 is effectively prevented from being displaced along the radial direction of the first barrel 110.

Illustratively, the elastic member 330 may be a spring.

Illustratively, the ball 310 may be made of metal.

In one possible embodiment, as shown in fig. 2 and 3, the positioning hole 111 includes a first hole portion 1111, the first hole portion 1111 is sleeved with the pressing member 320, and the pressing member 320 is in threaded connection with the first hole portion 1111, so as to facilitate adjusting the position of the pressing member 320 relative to the positioning hole 111. Specifically, the circumferential portion of the pressing member 320 is provided with external threads, and the inner surface of the first hole portion 1111 is provided with internal threads that are matingly coupled with the external threads of the pressing member 320. Illustratively, the first bore 1111 has a thread dimension M2-M3 and a depth of 2mm-3mm. For example, the first hole 1111 has a thread size of m3×p0.5 and a depth of 2.75mm.

In one possible embodiment, as shown in fig. 2 and 3, the positioning hole 111 further includes a second hole portion 1112, where the second hole portion 1112 is located at an end of the first hole portion 1111 facing the first mirror group 200, and the ball 310 is disposed in the second hole portion 1112, and the second hole portion 1112 can implement radial positioning of the ball 310 along the second hole portion 1112, so that the ball 310 is prevented from being separated from the elastic member 330, and the force of the ball 310 pressing the first mirror group 200 is stable and reliable. The ball 310 may be engaged with the second hole 1112 in a clearance fit manner, so that the ball 310 can smoothly roll. Illustratively, the second aperture portion 1112 is 0.8mm-1.5mm in diameter and 0.8mm-1.2mm in depth. For example, the diameter of the second hole portion 1112 is 1.3mm, the depth is 1mm, and the diameter of the ball 310 is 1.2mm.

In one possible embodiment, as shown in fig. 2, an end of the positioning hole 111 facing away from the first lens group 200 is provided with a sink 1113. Illustratively, the sink 1113 has a depth of 0.6mm-1mm. In this embodiment, a cover plate (not shown) may be disposed at the sink 1113, and the positioning hole 111 is sealed by the cover plate to prevent impurities such as dust and moisture from entering the lens barrel 100 through the positioning hole 111. In addition, the groove bottom of the countersink 1113 is planar, which facilitates the forming of the external thread of the first hole 1111, and facilitates the screwing of the pressing member 320 into the first hole 1111.

In a possible embodiment, as shown in fig. 3, the pressing member 320 is provided with a receiving groove 321 towards one end of the ball 310, the first end of the elastic member 330 is disposed in the receiving groove 321, the second end of the elastic member 330 abuts against the ball 310, and by the design of the receiving groove 321, the radial length of the positioning assembly 300 is effectively reduced, so that the wall thickness of the first barrel 110 is reduced, and the lens structure is more compact. Illustratively, the diameter of the receiving groove 321 is 0.8mm-1.5mm. For example, 1.3mm, and the elastic member 330 is a spring, the outer diameter of the elastic member 330 is 1mm, the wire diameter is 0.25mm, and the total number of turns is 6.

In a possible embodiment, as shown in fig. 4, an operation portion 322 is disposed at an end of the pressing member 320 facing away from the ball 310, and the operation portion 322 is operated to enable the pressing member 320 to move along the positioning hole 111, so as to achieve position adjustment of the pressing member 320 relative to the positioning hole 111, and thus the operation is convenient.

Illustratively, the operating portion 322 is two U-shaped grooves disposed opposite to each other in the radial direction of the pressing member 320, and the two U-shaped grooves may be engaged by a tool such as tweezers to screw the pressing member 320, and the U-shaped grooves may be disposed in communication with the receiving groove 321 in order to further compress the size of the operating member. Of course, the operation portion 322 may also have a structure of a linear groove, a cross groove or other shapes for facilitating screwing of the pressing member 320, which is not limited by the present utility model.

In the present embodiment, referring to fig. 1, 5 and 6, at least one positioning hole 111 is provided.

In one possible embodiment, as shown in fig. 5, the positioning hole 111 includes a plurality of first positioning holes 111a disposed at intervals along the axial direction of the first barrel 110, and one positioning assembly 300 is disposed through each of the first positioning holes 111a, so as to more effectively prevent the first lens group 200 from being displaced in the radial direction of the first barrel 110. Preferably, the positioning holes 111 include 2-4 first positioning holes 111a.

In one possible embodiment, as shown in fig. 6, the positioning hole 111 includes a plurality of second positioning holes 111b spaced along the circumferential direction of the first barrel 110, and one positioning assembly 300 is disposed through each of the second positioning holes 111b, so as to more effectively prevent the first lens group 200 from being displaced in the radial direction of the first barrel 110. Specifically, the second positioning holes 111b are disposed at equal intervals, and the sum α of the included angles between the adjacent second positioning holes 111b is 180 ° or less. Preferably, the positioning holes 111 include 2-4 second positioning holes 111b.

In a possible embodiment, the positioning holes 111 may include a plurality of first positioning holes 111a disposed at intervals along the axial direction of the first cylinder 110 and a plurality of second positioning holes 111b disposed at intervals along the circumferential direction of the first cylinder 110, which may be understood that the positioning holes 111 are disposed in a matrix. Of course, the positioning holes 111 may be arranged in other ways, which is not limited by the present utility model.

In the present embodiment, referring to fig. 1 and 7, the first lens group 200 includes a lens group barrel 210 and a plurality of first lenses 220 disposed in the lens group barrel 210, and the number and structure of the first lenses 220 are determined according to the use requirement, which is not limited in the present utility model. In the present embodiment, a first retaining ring portion 211 is disposed at an inner end portion of the lens group barrel 210, a first retaining ring 230 is screwed to an outer end portion of the lens group barrel 210, and a plurality of first lenses 220 are disposed between the first retaining ring portion 211 and the first retaining ring 230, so as to fix the first lenses 220.

Specifically, the ball 310 abuts the lens barrel 210.

Illustratively, the lens barrel 210 may be made of metal.

In this embodiment, referring to fig. 1 and 8, the lens structure further includes a second lens group 400, the lens barrel 100 further includes a second barrel portion 120, the second barrel portion 120 and the first barrel portion 110 are respectively located at two opposite ends of the lens barrel 100, the second lens group 400 is fixedly disposed in the second barrel portion 120, and the axial position of the first lens group 200 along the first barrel portion 110 is adjusted to cooperate with the second lens group 400, so as to implement a focusing function of the lens structure.

Specifically, the second lens group 400 includes a plurality of second lenses disposed in the second barrel 120, and the number and the structure of the second lenses are determined according to the requirement of use, which is not limited by the present utility model. In this embodiment, the inner end of the second barrel 120 is provided with a second stop ring 121, the outer end of the second barrel 120 is screwed with a second retainer 500, and a plurality of second lenses are disposed between the second stop ring 121 and the second retainer 500, so as to fix the second lenses.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A lens structure, comprising:

the lens barrel (100) comprises a first barrel part (110), wherein a positioning hole (111) is formed in the side wall of the first barrel part (110) along the radial direction;

a first mirror group (200) that is provided in the first tube (110) so as to slide in the axial direction of the first tube (110);

and the positioning assembly (300) is arranged in the positioning hole (111) in a penetrating way and is abutted against the first mirror group (200).

2. The lens structure according to claim 1, wherein the positioning assembly (300) comprises:

a ball (310) provided in the positioning hole (111) and abutting against the first mirror group (200);

a pressing member (320) penetrating through the positioning hole (111) and movable along the positioning hole (111);

and an elastic member (330) disposed between the ball (310) and the pressing member (320), the elastic member (330) being configured to provide a force with which the ball (310) presses the first mirror group (200) in the radial direction of the first cylinder portion (110).

3. The lens structure according to claim 2, wherein the positioning hole (111) includes a first hole portion (1111), the first hole portion (1111) is sleeved with the pressing member (320), and the pressing member (320) is screwed with the first hole portion (1111).

4. A lens structure according to claim 3, wherein the positioning hole (111) comprises a second hole portion (1112), the second hole portion (1112) is located at an end of the first hole portion (1111) facing the first lens group (200), the ball (310) is disposed in the second hole portion (1112), and radial positioning of the ball (310) along the second hole portion (1112) is achieved by the second hole portion (1112).

5. The lens structure according to claim 2, wherein a sinking groove (1113) is disposed at an end of the positioning hole (111) facing away from the first lens group (200).

6. The lens structure according to claim 2, wherein an end of the pressing member (320) facing the ball (310) is provided with a receiving groove (321), a first end of the elastic member (330) is disposed in the receiving groove (321), and a second end of the elastic member (330) abuts against the ball (310).

7. The lens structure according to claim 2, wherein an end of the pressing member (320) facing away from the ball (310) is provided with an operation portion (322), and the operation portion (322) is operated to move the pressing member (320) along the positioning hole (111).

8. The lens structure according to claim 7, wherein the operation portion (322) is two U-shaped grooves disposed opposite to each other in a radial direction of the pressing member (320), or the operation portion (322) is a straight groove, or the operation portion (322) is a cross-shaped groove.

9. The lens structure according to claim 1, further comprising a second lens group (400), wherein the lens barrel (100) further comprises a second barrel portion (120), the second barrel portion (120) and the first barrel portion (110) are respectively located at two opposite ends of the lens barrel (100), and the second lens group (400) is fixedly disposed in the second barrel portion (120).

10. The lens structure according to any one of claims 1 to 9, wherein the positioning hole (111) includes a plurality of first positioning holes (111 a) disposed at intervals along an axial direction of the first barrel portion (110), and one positioning assembly (300) is disposed through each of the first positioning holes (111 a); and/or

The positioning holes (111) comprise a plurality of second positioning holes (111 b) which are arranged at intervals along the circumferential direction of the first cylinder part (110), and each second positioning hole (111 b) is internally provided with one positioning assembly (300) in a penetrating way.