CN220526084U - Lens tabletting and lens assembly structure - Google Patents

Abstract

The utility model relates to a lens tabletting and a lens assembling structure, which comprises a tabletting main body with an annular structure, wherein the tabletting main body comprises: the extrusion part is arranged close to the circle center of the tabletting main body, and an included angle exists between the extrusion part and the lens during installation; the connecting part is far away from the circle center of the tabletting main body, and an included angle between the connecting part and the extruding part is an obtuse angle. The utility model has thin thickness, so that the occupied space is small, the distance between different groups of the zoom lens can be made smaller, and the mechanical back focus or the total length of the fixed focus lens can be made smaller, so that the cost is lower on the basis of small size and thin thickness.

Description

Lens tabletting and lens assembly structure

Technical Field

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

Background

With the development of digital electronic technology, the performance requirements of the market on various lenses are more and more severe, especially in the fields of security monitoring, intelligent transportation, intelligent vehicle lenses and the like.

The lens assembly structure has great influence on the optical performance of the lens and the performance stability under the high and low temperature conditions. Currently, there are a number of assembly structures for securing lenses in the industry, the corresponding limitations of which are as follows:

(1) The lens is fixed by glue bonding: because of the difference of physical parameters such as thermal expansion coefficients, young's modulus and the like of the glue, the lens and the lens barrel, the lens can be stressed at high and low temperatures, so that the performance of the lens is reduced, and even the lens is invalid.

(2) Screw thread clamping ring (screw thread clamping ring) fixed lens: the screw thread clamping ring is large in size, and under many scenes, corresponding structures are not designed in enough space, so that the performance of the lens is limited.

(3) The spacer ring (compression ring) presses the lens, and then the spacer ring is fixed through glue: the space ring is large in size, and in many scenes, the corresponding structure is not designed in enough space, so that the performance of the lens is limited.

(4) Plastic lens barrel hot melt fixed lens: when the fixed lens is a plastic lens, the high temperature of the hot melt can cause the plastic lens to deform, thereby affecting the performance and quality of the lens.

Therefore, how to make the connection and fixation between the lens and the lens barrel more stable and how to make the lens assembly structure more beneficial to ensuring the optical performance of the lens is a technical problem to be solved in the present day.

Disclosure of Invention

In order to solve the technical problems in the prior art, the utility model aims to provide a lens tabletting and a lens assembly structure, wherein the lens tabletting is simple in structure, easy to manufacture and low in cost, and the tabletting is thin and can generate elastic pretightening force, and the lens assembly structure enables the connection mode between the lens barrel and the lens to be more stable, so that the optical performance of the lens is more beneficial to being ensured.

In order to achieve the above object, the present utility model provides a lens press sheet comprising a press sheet body having a ring-like structure, the press sheet body comprising:

the extrusion part is arranged close to the circle center of the tabletting main body, and an included angle exists between the extrusion part and the lens before compression deformation;

the connecting part is far away from the circle center of the tabletting main body, and an included angle between the connecting part and the extruding part is an obtuse angle.

According to one aspect of the utility model, the angle between the pressing portion and the lens before being deformed by compression is smaller than 45 °.

According to one aspect of the present utility model, the connecting portion is provided with a clip piece adapted to the lens barrel.

According to one aspect of the present utility model, the pressing portion further includes a contact portion closest to a center of the lens press sheet body, and the contact portion is in contact with the lens when the lens press sheet is mounted.

According to one technical scheme of the utility model, the thickness of the tabletting main body is 0.2-0.5 mm.

According to one embodiment of the present utility model, the elastic modulus of the pressing portion is in the range of 50 to 206GPa.

According to an aspect of the present utility model, there is provided a lens assembly structure including:

a lens barrel;

a lens disposed in the lens barrel;

a lens sheeting according to any one of the above technical solutions;

one side of the extrusion part, which is close to the circle center of the tabletting main body, is contacted with the lens;

the connecting part is clamped with the lens cone.

According to one technical scheme of the utility model, the connecting part and the lens barrel are fixed through glue.

According to one technical scheme of the utility model, the joint of the lens barrel and the connecting part is provided with a hot melting part, and the lens barrel and the connecting part are clamped and fixed through the hot melting part of the lens barrel.

According to one aspect of the present utility model, the lens barrel is fastened to the connection portion.

According to one technical scheme of the utility model, the outer circumferential surface of the lens barrel is provided with a boss, and the boss is clamped with the connecting part.

According to one technical scheme of the utility model, a boss is arranged on the upper surface of the lens barrel, which is close to the upper surface in contact with the pressing piece, and the boss is clamped with the connecting part.

Compared with the prior art, the utility model has the following beneficial effects:

compared with a pressing ring, a space ring or a pressing ring, the pressing plate is thin, so that the occupied space is small, the distances among different groups of the zoom lens can be made smaller, and meanwhile, the mechanical back focus or the total length of the fixed focus lens can be made smaller, and the cost is lower on the basis of small size and thin thickness.

When the tabletting is adopted to fix the lenses, the minimum gap between lens groups can be 0.4mm, the thickness of the tabletting is about 2, the scheme is more excellent, the optical performance of the lens is improved, and the product competitiveness is improved.

The thickness, the material, the initial shape and the like of the tabletting can be designed according to the needs, so that the elastic pretightening force of the tabletting can be adjusted, and when the internal parts of the lens barrel are heavy, the elastic pretightening force can be increased; when the impact resistance requirement of the lens is high, the elastic pretightening force can be increased.

The initial shape of the tabletting is adjustable, so that the lens can be fixed under the condition that no platform surface exists on the outer side of the lens, more application scenes and requirements can be met, and the applicability is strong.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 schematically illustrates a schematic view of a preform placement and lens in one embodiment of the utility model;

FIG. 2 schematically illustrates a schematic view of a platen pressing a lens in accordance with one embodiment of the present utility model;

FIG. 3 schematically illustrates a lens barrel hot melt fixture preform according to an embodiment of the present utility model;

FIG. 4 schematically illustrates a glue retaining pellet in accordance with one embodiment of the utility model;

FIG. 5 schematically illustrates a snap-in type securing tab in accordance with one embodiment of the utility model;

FIG. 6 schematically illustrates a snap-in type securing tab according to another embodiment of the utility model;

FIG. 7 schematically illustrates a non-flat surface lens attachment in accordance with one embodiment of the present utility model;

FIG. 8 schematically shows a structure of a press sheet in an embodiment of the present utility model;

fig. 9 is a diagram schematically showing a conventional lens assembly structure in comparison with the lens assembly structure of the present utility model.

The correspondence between the reference numerals and the component names in fig. 1 to 9 is:

1. a lens barrel; 2. a lens; 3. tabletting; 4. glue; 5. a clamping piece; 6. a boss; 31. an extrusion part; 32. a connection part; 33. and a contact portion.

Detailed Description

The description of the embodiments of this specification should be taken in conjunction with the accompanying drawings, which are a complete description of the embodiments. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated simply or conveniently. Furthermore, portions of the structures in the drawings will be described in terms of separate descriptions, and it should be noted that elements not shown or described in the drawings are in a form known to those of ordinary skill in the art.

Any references to directions and orientations in the description of the embodiments herein are for convenience only and should not be construed as limiting the scope of the utility model in any way. The following description of the preferred embodiments will refer to combinations of features, which may be present alone or in combination, and the utility model is not particularly limited to the preferred embodiments. The scope of the utility model is defined by the claims.

As shown in fig. 1 to 8, a lens sheet 3 of the present utility model includes a sheet body having a ring-like structure, the sheet body including:

the extrusion part 31 is arranged close to the center of the tabletting main body, and an included angle exists between the extrusion part 31 and the lens 2 before compression deformation;

the connecting part 32 is arranged far away from the center of the tabletting main body, and the included angle between the connecting part 32 and the extrusion part 31 is an obtuse angle.

In this embodiment, the pressing sheet 3 at least includes two parts of the pressing part 31 and the connecting part 32, after the pressing sheet 3 is assembled with the lens barrel 1 and the lens 2, the pressing part 31 is close to the center of the pressing sheet main body, the connecting part 32 is far away from the center of the pressing sheet main body, meanwhile, the connecting part 32 is matched with the lens barrel 1, when the pressing sheet 3 is assembled with the lens barrel 1 and the lens 2, an included angle exists between the pressing part 31 and the lens 2, and the pressing sheet 3 is deformed by applying pressure through the pressing jig, at this moment, the pressing part 31 of the pressing sheet 3 generates elastic force tending to recover the original state due to deformation, and the reactive force of the elastic force generates elastic pretightening force on the lens 2, thereby realizing the pressing of the lens 2.

Therefore, in the material bearing range of the pressing sheet 3, the elastic force generated by the pressing portion 31 is related to the included angle between the pressing portion 31 and the lens 2 and the included angle after being deformed by compression, and the larger the included angle between the pressing portion 31 and the lens 2 is, the larger the corresponding deformation amount of the pressing sheet 3 is, so the larger the elastic force generated by the pressing sheet is.

The thickness of the pressing sheet 3 is thinner than that of the pressing ring, the spacing ring or the pressing ring, so that the occupied space is small, the distance between different groups of the zoom lens can be made smaller, and the mechanical back focus or the total length of the fixed focus lens can be made smaller at the same time, so that the cost is lower on the basis of small size and thin thickness.

For example, as shown in fig. 9, in fig. 9a, when a spacer ring, a pressing ring or a pressing ring is selected between adjacent lens groups of the zoom lens, the thickness of the spacer ring, the pressing ring or the pressing ring is about 0.5mm, and at this time, the minimum gap between the lens groups can only be 1mm, while in fig. 9b, when the lens 2 is fixed by adopting the press sheet 3 of the present utility model, the minimum gap between the lens groups can be 0.4mm, which is about 2 thicknesses of the press sheet 3, so that the scheme is better, which is more favorable for improving the optical performance of the lens and improving the competitiveness of the product.

The thickness, the material, the initial shape and the like of the pressing sheet 3 can be designed according to the needs, so that the elastic pre-tightening force of the pressing sheet 3 can be adjusted, and when the internal parts of the lens barrel 1 are heavy, the elastic pre-tightening force can be increased; when the impact resistance requirement of the lens is high, the elastic pretightening force can be increased. Meanwhile, in the prior art, the lens 2 is fixed by plane extension on the outer side of the lens 2, but the initial shape of the pressing piece 3 is adjustable, so that the lens 2 can be fixed under the condition that no plane surface is arranged on the outer side of the lens 2, more application scenes and requirements can be met, and the applicability is strong.

At high and low temperatures, due to the thermal expansion difference of the internal parts of the lens barrel 1, the gap or interference in the lens can be effectively improved by the elastic pre-tightening force of the pressing sheet 3. When the gap exists in the inner part of the lens, the elastic pre-tightening force of the pressing sheet 3 pushes the inner part to tightly push, so that the gap is eliminated; when the lens is in interference, the pressing sheet 3 bears larger deformation, so that the stress borne by the lens 2 is reduced, and the influence on the performance of the lens at high and low temperatures is avoided or reduced.

At high and low temperatures, the internal parts of the lens barrel 1 are displaced relative to the lens barrel 1 due to the thermal expansion difference of the internal parts of the lens barrel 1 and the elastic pre-tightening force of the pressing piece 3. When the normal temperature is recovered, the displacement of the internal parts of the lens relative to the lens barrel 1 can be recovered due to the elasticity of the pressing sheet 3, so that the stability of the performance of the lens is ensured when the lens is recovered to the normal temperature after the lens is subjected to high and low temperatures.

In one embodiment of the utility model, the pinch 31 preferably forms an angle of less than 45 ° with the lens 2 prior to compression deformation.

In one embodiment of the present utility model, preferably, before the lens pressing sheet 3 is deformed under pressure, the direction of the included angle between the connecting portion 32 and the pressing portion 31 is downward, and the direction of the included angle between the connecting portion 32 and the pressing portion 31 may be upward after the lens assembly of the object side is completed.

In one embodiment of the present utility model, it is preferable that the connection portion 32 is provided with the engaging piece 5 that is fitted to the lens barrel 1.

In this embodiment, the clamping piece 5 may be provided with a through hole, and the through hole is adapted to the clamping boss on the lens barrel 1, so that the stability of the connection between the connecting portion 32 and the lens barrel 1 can be improved.

In one embodiment of the present utility model, preferably, the pressing portion further includes a contact portion 33 closest to the center of the tablet body, and the contact portion 33 is in contact with the lens 2 without being subjected to jig pressure when the tablet 3 is placed on the lens 2.

The contact portion 33 is used for contacting the lens 2, and when the size of the contact portion 33 is large, it corresponds to a surface that is abutted between the pressing portion 31 and the lens 2.

In one embodiment of the present utility model, it is preferable that the thickness of the tablet body is 0.2 to 0.5mm.

In one embodiment of the present utility model, the elastic modulus of the pressing portion 31 is preferably in the range of 50 to 206GPa.

According to an aspect of the present utility model, there is provided a lens assembly structure including:

a lens barrel 1 and a lens 2 arranged in the lens barrel 1;

a lens sheeting 3 according to any one of the above technical solutions;

one side of the pressing part 31, which is close to the center of the tabletting main body, is contacted with the lens 2;

the connecting portion 32 is engaged with the lens barrel 1.

In one embodiment of the present utility model, it is preferable that the connection portion 32 is fixed with the lens barrel 1 by glue 4.

In this embodiment, the glue 4 fixes the pressing piece 3, and the glue 4 does not directly contact the lens 2, especially the plastic lens 2, so that the problem that the lens 2 is deformed due to the influence of the glue 4 can be effectively avoided, the stable performance of the lens is ensured, meanwhile, the influence of the glue 4 on the lens 2 at high and low temperatures can be weakened, and the stability of the lens reliability experiment is improved.

As shown in fig. 3, in one embodiment of the present utility model, preferably, a connection portion between the lens barrel 1 and the connection portion 32 is provided as a heat-fused portion, and the lens barrel 1 and the connection portion 32 are fastened by the heat-fused portion of the lens barrel 1.

In this embodiment, the heat-melting portion on the heat-melting lens barrel 1 deforms the lens barrel 1 to press the fixing pressing piece 3, and the heat-melting portion does not directly contact the lens 2, so that the lens 2 is effectively prevented from being deformed by heat, and the yield and performance of the lens are improved.

As shown in fig. 5 and fig. 6, in an embodiment of the present utility model, preferably, the lens barrel 1 and the connecting portion 32 are fastened and fixed, the fastening piece 5 may be provided with a through hole, the through hole is adapted to a boss on the lens barrel 1, so that stability of connection between the connecting portion 32 and the lens barrel 1 can be improved, and the fastening piece 3 is fastened and fixed to effectively avoid deformation of the lens 2 caused by heat or deformation affected by the glue 4, so as to ensure stable performance of the lens.

In the above embodiment, through the hot melting of the hot melting part of the lens barrel 1, the bonding of the glue 4 or the fastening mode, corresponding adjustment can be made according to the actual space requirement of the product, the shape of the lens barrel 1 and the like, and the fastening mode is not limited to the above mode, so that the general applicability of the assembly structure is improved.

In the practical use process, the lens assembly structure is applicable to fixing the outermost lens 2 of the optical lens, can be used for fixing a scene of one lens 2, can also be used for fixing scenes of a plurality of lenses 2 or parts such as space rings, and the like, can be applied to various application scenes, and has strong commonality.

According to an aspect of the present utility model, there is provided a lens comprising a lens barrel 1, a lens 2 and a press sheet 3, wherein the lens barrel 1, the lens 2 and the press sheet 3 are connected by a lens assembly structure according to any one of the above technical solutions.

The following description will be given of a specific embodiment in which the contact portion 33 refers to a portion that contacts the lens 2 without receiving jig pressure when the pressing sheet 3 is placed on the lens 2.

Example 1

As shown in fig. 3, the present utility model provides a lens assembly structure, which includes a lens barrel 1, an outermost lens 2 assembled in the lens barrel 1 (wherein the outermost lens 2 refers to the lens 2 closest to an image plane), and a pressing piece 3 for fixing the lens 2 in the lens barrel 1.

After the lens 2 of the lens is assembled, the pressing sheet 3 is placed on the outermost lens 2 (wherein the outermost lens 2 refers to the lens 2 closest to the image plane) of the optical lens, as shown in fig. 1; pressing the pressing piece 3 by a jig, and flattening the pressing piece 3 and the plane of the pressing part 31 of the lens 2 as shown in fig. 2; under the condition of maintaining the jig pressure, the hot-melt part of the lens barrel 1 is hot-melted, and the fixing of the lens barrel 1, the pressing piece 3 and the lens 2 is realized through the hot-melt part of the lens barrel 1, as shown in fig. 3.

In the above embodiment, the pressing sheet 3 is fixed by hot melting, and the lens 2 is not directly contacted, so that the lens 2 can be effectively prevented from being deformed by heat, and the yield and performance of the lens are improved.

Example two

Fig. 7 is a schematic view of another lens assembly structure according to the present utility model.

In contrast, compared with the embodiment one, the outer side of the lens 2 has a plane, the included angle between the extrusion part 31 of the pressing piece 3 and the connecting part 32 is upward, in this embodiment, when the outer side of the lens 2 has no plane surface, the extrusion part 31 of the pressing piece 3 presses the cambered surface of the lens 2, so that the shape of the extrusion part 31 is adjusted and changed according to the cambered surface of the lens 2, and then contacts with the cambered surface of the lens 2 in a fitting manner, and the fixing of the lens barrel 1, the pressing piece 3 and the lens 2 is realized through the hot melting lens barrel 1.

The embodiment can still be fixed under the condition that the shape of the outer side of the lens 2 is not provided with the flat table surface, so that the problem that the lens 2 can be fixed only by the fact that the plane extension is arranged on the outer side of the lens 2 is needed for fixing the lens 2 in the prior art is effectively solved, more application scenes and requirements are favorably met, and the universality is strong.

Example III

Referring to fig. 1 and 4, another structure of a lens assembly structure according to the present utility model is shown.

After the lens 2 of the lens is assembled, the pressing sheet 3 is placed on the outermost lens 2 (wherein the outermost lens 2 refers to the lens 2 closest to the image plane) of the optical lens, as shown in fig. 1; pressing the pressing sheet 3 by a jig, and flattening the contact plane of the pressing sheet 3 and the lens 2, as shown in fig. 2; under the condition of maintaining the pressure of the jig, the pressing piece 3 is fixed through the glue 4, namely, the fixation of the lens barrel 1, the pressing piece 3 and the lens 2 is realized, as shown in fig. 4.

According to the embodiment, the pressing sheet 3 is bonded and fixed through the glue 4, and the lens 2, especially the plastic lens 2, is not directly contacted, so that the lens 2 can be effectively prevented from being influenced by the glue 4 to deform, the stable performance of the lens is ensured, the influence of the glue 4 on the lens 2 at high and low temperatures can be weakened, and the stability of the lens reliability experiment is improved.

Example IV

Referring to fig. 5, another structure of a lens assembly structure according to the present utility model is shown.

The shape of the mating of the pressing piece 3 and the lens barrel 1 includes, but is not limited to, the shape shown in fig. 1, but may be other shapes as well, as shown in fig. 5. The outside of the lens cone 1 is provided with a boss 6, the extrusion part 31 of the pressing sheet 3 is provided with a clamping sheet 5, the clamping sheet 5 is bent downwards and is provided with a hole, after the extrusion part 31 of the pressing sheet 3 is elastically deformed, the pressing sheet 3 can be fixed in a mode of buckling the boss 6 and the hole, and the lens cone 1, the pressing sheet 3 and the lens 2 are fixed.

In the above embodiment, the lens 2 is not directly contacted with the lens 2 by the buckle type fixing pressing piece 3, so that the lens 2 can be effectively prevented from being deformed by heat or being influenced by the glue 4, and the stable performance of the lens is ensured.

Example five

Referring to fig. 6, another structure of a lens assembly structure according to the present utility model is shown.

The shape of the mating of the tablet 3 and the lens barrel 1 includes, but is not limited to, the patterns shown in fig. 1 and 5, but other shapes are also possible, as shown in fig. 6. Cylindrical boss 6 is made on lens cone 1, matched round holes are made on clamping piece 5 or connecting part 32 of pressing piece 3, after pressing piece 3 is pressed in place, boss 6 of lens cone 1 is hot melted, boss 6 is deformed and pressed to clamp piece 5 or connecting part 32, and fixing of lens cone 1, pressing piece 3 and lens 2 is achieved.

According to the embodiment, the pressing sheet 3 is fixed in the mode of the buckle type and the hot melting lens barrel 1, and the lens 2 is not directly contacted with the lens 2, so that the lens 2 can be effectively prevented from being deformed by heat or being influenced by the glue 4, and the stable performance of the lens is ensured.

The utility model relates to a lens tabletting and a lens assembling structure, wherein the lens tabletting comprises a tabletting main body with an annular structure, and the tabletting main body comprises: the extrusion part is arranged close to the center of the tabletting main body, and an included angle exists between the extrusion part and the lens before compression deformation; the connecting part that the centre of a circle that keeps away from the preforming main part set up, contained angle between connecting part and the extrusion part be the obtuse angle, and thickness is thin for occupation space is little, and then the distance can be made less between the different groups of zoom, and is also can be made less to the mechanical back burnt or the total length of fixed focus camera lens simultaneously, on the basis that the size is little, thickness is thin, the cost is lower.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the utility model.

Claims (12)

1. A lens sheeting, includes the sheeting main part that is annular structure, its characterized in that, the sheeting main part includes:

an extrusion part (31) arranged close to the center of the tabletting main body, wherein an included angle exists between the extrusion part (31) and the lens (2) before being deformed under compression;

and the connecting part (32) is far away from the circle center of the tabletting main body, and an included angle between the connecting part (32) and the extruding part (31) is an obtuse angle.

2. Lens sheeting according to claim 1, characterized in that the angle between the pressing portion (31) and the lens (2) before being deformed by compression is less than 45 °.

3. Lens sheeting according to claim 1, characterized in that the connecting part (32) is provided with a clamping piece (5) which is adapted to the lens barrel (1).

4. A lens press according to any one of claims 1 to 3, wherein the press part further comprises a contact part (33) closest to the centre of the press body, the contact part (33) being in contact with the lens (2) when the lens press (3) is mounted.

5. A lens sheeting according to any one of claims 1 to 3, wherein the sheeting body has a thickness of 0.2 to 0.5mm.

6. A lens preform according to any one of claims 1 to 3, wherein the elastic modulus of the pressing portion (31) is in the range of 50-206 GPa.

7. A lens assembly structure, comprising:

a lens barrel (1);

a lens (2) disposed in the lens barrel (1);

lens sheeting (3) according to one of claims 1 to 5;

one side of the extrusion part (31) close to the center of the tablet main body is contacted with the lens (2);

the connecting part (32) is clamped with the lens barrel (1).

8. The lens assembly structure according to claim 7, wherein the connection portion (32) and the lens barrel (1) are fixed by glue (4).

9. The lens assembly structure according to claim 7, wherein a junction of the lens barrel (1) and the connecting portion (32) is provided as a heat-melted portion, and the lens barrel (1) and the connecting portion (32) are fixed by the heat-melted portion of the lens barrel (1) being clamped.

10. The lens assembly structure according to claim 7, wherein the lens barrel (1) is snap-fitted with the connecting portion (32).

11. The lens assembly structure according to claim 10, wherein a boss (6) is provided on an outer circumferential surface of the lens barrel (1), the boss (6) being engaged with the connecting portion (32).

12. The lens assembly structure according to claim 10, wherein a boss (6) is provided on an upper surface of the lens barrel (1) near to contact with the pressing piece (3), the boss (6) being engaged with the connecting portion (32).