CN116113865A

CN116113865A - Lens fixing structure for optical actuator and corresponding camera module

Info

Publication number: CN116113865A
Application number: CN202180055156.8A
Authority: CN
Inventors: 叶林敏; 梅哲文; 周秀秀; 熊实
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2020-09-29
Filing date: 2021-08-13
Publication date: 2023-05-12
Also published as: CN114326001A; CN114326001B; WO2022068421A1

Abstract

A lens fixing structure for an optical actuator, comprising: a carrier (52) adapted for controlled movement under the drive of an optical actuator; a lens barrel (51) having an inner surface adapted to mount a lens; and an elastic member (53) that includes a fixing portion (531) for connecting the lens barrel (51) and a connecting portion (532) for connecting the carrier (52); the fixing part (531) comprises two arc-shaped side walls (534), and the two arc-shaped side walls (534) are respectively supported on the outer side surfaces of the two sides of the lens barrel (51) or are respectively embedded into the lens barrel (51). The camera module comprises the lens fixing structure. By arranging the elastic component (53) between the lens cone (51) and the carrier (52), the stress on two sides can be uniform while the lens cone (51) is fixed, the problem caused by uneven stress caused by glue adhesion is avoided, and the production efficiency and the yield are improved.

Description

Lens fixing structure for optical actuator and corresponding camera module

RELATED APPLICATIONS

The present application claims priority from chinese patent application No. 202011050011.2, filed in 9/29 of 2020, entitled "lens fixing structure for optical actuator and corresponding camera module", and the entire contents of the above applications are incorporated herein by reference.

Technical Field

The invention relates to the technical field of optics, in particular to an image pickup module and an assembly method thereof.

Background

With the increase of the demands of consumers for mobile phone photographing, the functions of mobile phone cameras (i.e. camera modules) are more and more abundant, and the functions of portrait photographing, remote photographing, optical zooming, optical anti-shake and the like are integrated in cameras with limited volumes, and the functions of automatic focusing, optical anti-shake, optical zooming and the like are often realized by means of optical actuators.

The optical actuator may also be referred to as a motor. In the current light and thin mobile electronic terminal devices such as mobile phones and tablet computers, various motors are generally adopted for focusing driving and anti-shake driving. Each drive module often needs to move a lens module (e.g., an optical lens) in a preset movement direction, whether in focus or anti-shake drive. In particular, the motor may comprise a housing and a carrier, the carrier being movably connected to the housing. The optical lens can be arranged on the carrier, and the carrier carrying the optical lens can move relative to the shell in a preset degree of freedom under the action of the driving module (such as a coil magnet combination), so that functions of focusing, anti-shake or optical zooming and the like are realized. In the prior art, the carrier and the lens are fixed in a common fixing mode by adopting a screw thread and dispensing mode or a dispensing mode only. When the carrier and the lens are bonded by using the glue, the cohesive strength property of the glue can be greatly changed (the amplitude of the cohesive strength property is about thousands of N/cm < 2 >) in the process that the glue is changed from a flexible, undried state to a tough, hard solid state, so that obvious internal stress of the glue occurs. On the one hand, in the process of glue solidification, the glue can shrink, and the shrinkage of glue is different with the shrinkage of lens cone bonding position, and consequently the shrink of glue can produce a pulling force to the camera lens, makes the inside certain stress that produces of camera lens for the face type deformation or the position deviation of the inside lens of camera lens, thereby influences the imaging quality of periscope formula module. On the other hand, in the glue solidification process of the periscope type camera module assembly process, the module is often required to be baked and cooled, and in the baking and cooling process, as the thermal expansion coefficients of the lens barrel of the lens and the glue are not matched (namely the thermal expansion coefficients of the lens barrel of the lens and the glue are different), different shrinkage amounts can be generated between the lens barrel of the lens and the glue, so that certain stress is generated inside the lens, the stress influences the lens surface type in the lens, and the imaging quality of the periscope type module is reduced.

In the first place, when the weight of the lens to be mounted on the motor is large, for example, the periscope type long-focus camera module often needs a large-weight lens, and then, for example, a large image surface photosensitive chip is adopted to correspondingly increase the weight of the lens, the large-weight lens and the motor carrier are fixed, and the amount of glue used is also large, so that the shrinkage or expansion of the glue has a larger negative effect on the imaging quality of the lens.

Moreover, the periscope type camera module at present usually adopts a horizontal assembly mode, namely, a prism module, a lens module and a photosensitive module are arranged along the horizontal direction, and the modules are installed on a bottom plate of a module shell. The module housing often also requires four sidewalls integrally formed with or connected to the base plate, so that the motor carrier often does not employ a closed structure for ease of assembly. The conventional motor carrier is generally cylindrical and has an axis which is generally vertical when assembled so that the optical lens can be fitted into the motor carrier from an opening in the end face of the carrier. For a periscope type module which is assembled horizontally, two end faces of a motor carrier face to two sides respectively, and if a lens is still installed from the end faces of the motor carrier, the motor carrier is easy to interfere by the side walls of other modules or module shells. Thus, for periscope type camera modules, the top side of the carrier often has an opening so that the lens can be loaded from the top of the carrier. However, since the peripheral side of the carrier is not closed, the stress caused by shrinkage or expansion of the glue when the carrier is fixed to the lens will be more uneven. Therefore, for periscope type camera modules, the negative effect caused by the fact that the carrier and the lens are fixed by glue on the imaging quality may be more obvious.

In summary, there is a need in the market for a lens fixing structure for an optical actuator and a corresponding image capturing module that have many advantages such as high imaging quality, contribution to miniaturization of the module, and ease of assembly.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a lens fixing structure for an optical actuator and a solution of a corresponding camera module, wherein the lens fixing structure can improve imaging quality, is easy to assemble and is beneficial to miniaturization of devices.

In order to solve the above technical problem, the present invention provides a lens fixing structure for an optical actuator, comprising: a carrier adapted for controlled movement under the drive of the optical actuator; the inner side surface of the lens barrel is suitable for mounting a lens; and an elastic member including a fixing portion for connecting the lens barrel and a connecting portion for connecting the carrier; the fixing part comprises two arc-shaped side walls which are respectively supported on the outer side surfaces of the two sides of the lens barrel or are respectively embedded into the lens barrel.

The fixing part further comprises a planar bottom wall, the two arc-shaped side walls are connected with the bottom wall into a whole, and the two arc-shaped side walls are respectively supported on the outer side surfaces of the two sides of the lens cone so as to fasten the lens cone between the two arc-shaped side walls and the bottom wall.

The bottom end of the arc-shaped side wall is connected with the bottom wall, and the top end of the arc-shaped side wall is bent outwards and extends downwards to form the connecting part.

The connecting part is of an arc single arm, or is U-shaped, or is of a winding shape formed by a plurality of U-shaped.

The fixing part is embedded into the side wall of the lens barrel through an embedded injection molding process.

Wherein, the top end position of the fixing part is higher than the center axis position of the lens barrel.

The top end of the fixing part is provided with an opening, and the width of the opening is smaller than the diameter of the outer contour of the lens barrel.

Wherein, the two arc side walls are separated and are respectively embedded into two sides of the lens cone.

The two arc side walls are separated and respectively supported on the outer side surfaces of the two sides of the lens cone, and the bottom ends of the two arc side walls are respectively connected with the lens cone through a buckling structure.

The top end of the arc-shaped side wall is bent outwards and extends downwards to form the connecting part, and the bottom end of the connecting part is connected with the inner side face of the carrier through a buckle structure.

The top end of the arc-shaped side wall is bent outwards and extends downwards to form the connecting part, and the bottom end of the connecting part is bonded with the inner side face of the carrier.

Wherein, the connection of the bottom of connecting portion with the medial surface of carrier passes through glue reinforcement.

Wherein, the buckle structure is public buckle and female buckle.

The connecting part is provided with an end connecting piece, the inner side surface of the carrier is provided with a T-shaped bulge, and the T-shaped bulge comprises a neck and an end part with a width larger than that of the neck; the end connector is provided with an opening, and the shape of the opening is matched with that of the neck of the T-shaped bulge.

Wherein the connecting part is provided with an end connecting piece, the end connecting piece is provided with a T-shaped bulge, and the T-shaped bulge comprises a neck part and an end part with a width larger than that of the neck part; the inner side surface of the carrier is provided with a groove, and the shape of the neck of the T-shaped bulge is matched with the shape of the groove.

The end part of the T-shaped bulge is provided with an inclined plane, and the inclined angle alpha of the inclined plane meets 90 degrees < alpha < 180 degrees.

According to another aspect of the present application, there is further provided a camera module, a housing thereof, and an optical path turning assembly, a lens assembly and a photosensitive assembly mounted in the housing; the lens assembly includes any of the lens holding structures for an optical actuator described above.

In the lens fixing structure, a plurality of lenses are installed in the lens barrel, the lens barrel comprises at least one adapting section for installing the elastic component, and the diameter of the lenses installed in the adapting section is smaller than that of the lenses installed in other sections of the lens barrel.

In the lens fixing structure, a plurality of lenses are installed in the lens barrel, the lens barrel comprises at least one adapting section for installing the elastic component, and the optical sensitivity of the lenses installed in the adapting section is higher than that of the lenses installed in other sections of the lens barrel.

Wherein the top side of the carrier is open; the lens barrel is internally provided with a plurality of lenses, wherein the outer contour of at least one lens is in a cutting circle shape, and one cutting edge of the lens, the outer contour of which is in the cutting circle shape, is positioned at the top side.

Compared with the prior art, the application has at least one of the following technical effects:

1. according to the lens barrel fixing device, the elastic component is arranged between the lens barrel and the carrier, so that the stress on two sides is uniform when the lens barrel is fixed, and the problem caused by uneven stress caused by glue adhesion is avoided.

2. In some embodiments of the present application, the top of the elastic member has an opening, and is convenient for the installation and buckling of the lens barrel, which is helpful for improving the production efficiency and the production yield.

3. In some embodiments of the present application, the elastic member may be disposed at one end of the lens with higher sensitivity, and the influence of the glue stress on the highly sensitive lens is counteracted by the elastic member, so that the imaging effect is better ensured.

4. In some embodiments of the present application, the elastic member may be disposed at one end of the lens with smaller size, so that the gap between the lens and the carrier may be fully utilized, and the space utilization of the camera module may be improved, so that the structure of the module is more compact.

5. In some embodiments of the present application, for periscope-type modules, the elastic members therein may be disposed at the side walls of the lens barrel and the motor carrier, thereby avoiding occupying space in the height direction of the periscope-type module.

Drawings

FIG. 1 is a schematic perspective view of a periscope camera module according to one embodiment of the present application;

FIG. 2 illustrates a schematic cross-sectional view of a periscope camera module in one embodiment of the present application;

FIG. 3 shows a lens with a cut edge;

FIG. 4 illustrates a schematic cross-sectional view of a lens mount structure in one embodiment of the present application;

FIG. 5 illustrates an enlarged partial schematic view of a snap-fit connection between a motor carrier and a resilient member in one embodiment of the present application;

FIG. 6a shows a schematic cross-sectional view of a lens fixing structure according to another embodiment of the present application;

FIG. 6b shows an enlarged partial schematic view of a snap-fit connection between a motor carrier and a resilient member in another embodiment of the present application;

FIG. 7a is a schematic cross-sectional view showing a lens fixing structure according to still another embodiment of the present application;

FIG. 7b shows an enlarged partial schematic view of a snap-fit connection between a motor carrier and a resilient member in yet another embodiment of the present application;

FIG. 8a shows a schematic cross-sectional view of a lens holding structure in yet another embodiment of the present application;

FIG. 8b shows an enlarged partial schematic view of a snap-fit connection between a motor carrier and a resilient member in yet another embodiment of the present application;

FIG. 9 is a perspective view showing a lens fixing structure in one embodiment of the present application;

FIG. 10 is a schematic cross-sectional view showing a lens fixing structure in a modified embodiment of the present application;

FIG. 11 is a schematic cross-sectional view showing a lens fixing structure in another modified embodiment of the present application;

fig. 12 is a schematic cross-sectional view showing a lens fixing structure in still another modified embodiment of the present application.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, etc. are only used to distinguish one feature from another feature, and do not represent any limitation of the feature. Thus, a first body discussed below may also be referred to as a second body without departing from the teachings of the present application.

In the drawings, the thickness, size and shape of the object have been slightly exaggerated for convenience of explanation. The figures are merely examples and are not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

As used herein, the terms "substantially," "about," and the like are used as terms of a table approximation, not as terms of a table level, and are intended to illustrate inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

The invention is further described below with reference to the drawings and specific embodiments.

According to one embodiment of the present application, a periscope type camera module with an optical actuator is provided, and the optical actuator adopts a lens fixing structure based on a spring sheet, so that defects caused by bonding and fixing between a lens and a carrier by using glue are avoided. Fig. 1 is a schematic perspective view of a periscope type camera module according to an embodiment of the present application, and fig. 2 is a schematic cross-sectional view of the periscope type camera module according to an embodiment of the present application. Referring to fig. 1 and 2, in the present embodiment, the periscope type camera module includes a light path turning component 10, a lens component 20 and a photosensitive component 30, where the light path turning component 10 is located at the front end (i.e. near the object side end) of the periscope type camera module, so as to reflect the incident light of the object and change the propagation direction of the light. The lens assembly 20 is located between the optical path turning assembly 10 and the photosensitive assembly 30, and the light emitted from the optical path turning assembly 10 passes through the lens assembly 20 and then reaches the photosensitive assembly 30, and is imaged by the photosensitive assembly 30. In the present embodiment, the lens assembly 20 includes a lens 21 (i.e., an optical lens) and a motor mechanism 22, and the motor mechanism 22 includes a motor carrier 23, and the motor carrier 23 is movable relative to a motor housing (which may be a part of the periscope type camera module housing 40, for example) under the action of a motor driving element. The lens 21 is fixed on the motor carrier, and the lens 21 can move relative to the motor housing along with the motor carrier 23 under the drive of the motor carrier 23, so as to realize optical focusing and/or optical anti-shake. Further, the motor mechanism 22 may also be used to implement an optical zoom function. In the present embodiment, a lens fixing structure based on an elastic member is provided to fix the lens 21 to the motor carrier 23, so as to avoid the defect caused by using glue to bond and fix between the lens 21 and the motor carrier 23.

Specifically, in the present embodiment, the lens includes a lens (typically, a lens) and a barrel. Generally, a lens barrel includes at least two lenses arranged along an optical axis, the number of lenses may be changed according to an optical design, and a plurality of lenses may be accommodated therein in an optical axis direction. In this embodiment, the lens is fixed in the motor carrier using an elastic member. For convenience of description, the motor carrier is sometimes simply referred to as a carrier hereinafter, and a combined structure of the carrier, the spring and the lens barrel is regarded as the lens fixing structure. In this embodiment, the carrier may have a cylindrical shape with one side opening. In particular, the cross section of the carrier (referring to a section perpendicular to the axis of the carrier) may be U-shaped with its open side facing upwards. That is, when the axis of the carrier is in a horizontal state, the top side of the carrier has an opening. Therefore, the lens barrel can be placed into the carrier from the top side of the carrier, and the position of the lens can be adjusted based on the actual measurement imaging result of the photosensitive assembly in the placing process, so that the periscope type camera module achieves the preset imaging quality index. It should be noted that the motor mechanism described in the present application may be a VCM motor (which is typically provided with a driving force by a coil magnet combination, VCM is an acronym for voice coil motor), an SMA motor (which provides a driving force by an SMA element, SMA is an acronym for shape memory alloy), or a MEMS motor (MEMS is an acronym for microelectromechanical system), etc., and the present application mainly refers to a fixing structure for fixing a carrier and a lens, and thus the type of driving element used for the motor may not be limited.

Further, in some embodiments of the present application, the lens may be a D-cut lens. The D-cut lens is to provide a cutting edge (also referred to as a trimming edge) on the lens, so that the outer contour of the lens forms a cutting circle shape. Figure 3 shows a lens with a cut edge. Lenses with cut edges are referred to herein as D-cut lenses. The D-cut lens includes at least one chord edge and at least one arc edge. Wherein the chord edge is adjacent to the arc edge, the curvatures of the chord edge and the arc edge are different, the curvature of the chord edge is 0, the chord edge is a straight line segment, the curvature of the arc edge is more than 0, and the chord edge is an arc line segment. When the outer lens contour is composed of one chord edge and one arc edge, the shape is similar to the letter "D", and is therefore referred to as a D-cut lens. However, the D-cut lens is not limited to the shape of the letter "D". For example, referring to fig. 3, the d-cut lens may have two parallel cut edges 21a, where the outer contour is made up of two chordal edges and two arcuate edges. In a preferred embodiment, the cut edge 21a is located only in the non-optical area of the lens to avoid affecting the optical area of the lens. Further, the D-cut lens comprises two chord sides and two round sides, so that the D-cut lens has symmetry, and the internal stress generated by the lens is uniform when the D-cut lens is molded (such as injection molding). In this way, the shrinkage of the material itself during the curing and forming of the liquid material during the manufacture of the lens is relatively more uniform, and the surface accuracy of the lens can be improved to some extent (compared to an asymmetric D-cut lens). Further, in order to enable the D-cut lens to be tightly combined with the lens barrel, at least one trimming edge can be arranged on the lens barrel, the trimming edge of the D-cut lens is matched with the trimming edge of the lens barrel, and when the lens is assembled into the lens barrel, the pressure action of the lens barrel on the lens is relatively uniform and symmetrical, so that the deformation of the lens caused by the extrusion of the lens barrel is more uniform and symmetrical. Further, the D-cut lens can be molded by injection molding, wherein the cut edge can be directly molded into a D-cut shape (i.e. cut round shape) by setting the mold shape; it is also possible to first mold a conventional lens and then to effect the setting of the cut edges by means of cutting.

In the above embodiment, for the periscope type camera module assembled horizontally, when the lens is assembled with the carrier, the trimming edge of the lens may be placed on the top side. When the lens has two parallel cut edges, the two parallel cut edges may be placed on the top side and the bottom side, respectively. Here, horizontal assembly refers to the arrangement of the light path turning member 10, the lens member 20, and the photosensitive member 30 in the horizontal direction (i.e., lateral arrangement, refer to fig. 2) at the time of assembly.

It should be noted that, in the assembly process of the existing periscope type camera module, in order to firmly fix the lens to the motor carrier, a large amount of glue is arranged between the lens and the motor carrier to bond and fix the lens and the motor carrier. Whether a conventional lens or a D-cut lens is adopted, the lens is fixed with a motor carrier through glue, the glue can shrink in the curing process, the lens barrel can be pulled in the shrinking process, and uneven stress can be generated in the lens due to the difference between the shrinkage of the glue and the shrinkage of the bonding position, so that the lens in the lens barrel is extruded, the surface shape of the lens is changed, and the imaging effect is influenced; in addition, in the baking and cooling process of the camera module, the thermal expansion coefficients of the lens barrel and the glue are not matched (different), different shrinkage amounts are generated between the lens barrel and the glue, uneven stress is generated inside the lens, the stress affects the lens surface type in the lens, and the imaging quality is reduced. In a conventional lens, uneven stress in the lens can change the surface shape of the lens, and the lens is enlarged or reduced; in the D-cut lens, the stress influence of the glue can lead to uneven stress in the lens due to the trimming of the lens barrel and the lens, and the stress of the glue can have larger influence on the lens due to the shorter distance between the lens barrel and the optical area of the lens at the trimming, so that the lens is easier to deform.

In order to avoid the influence of glue stress between the lens barrel and the motor carrier, an elastic component is arranged between the lens barrel and the motor carrier in the application, so as to form a lens fixing structure. In the lens fixing structure, an elastic member is disposed between the lens barrel and the motor carrier for supporting and fixing the lens.

Further, in one embodiment of the present application, in the lens fixing structure, one end of the elastic member is fixed to the lens barrel by fastening or molding, and the other end is fixed to the motor carrier by sticking or fastening. Through this elastic component, can avoid directly pasting through glue between lens cone and the motor carrier to avoid the stress direct influence lens cone that glue produced, avoid the camera lens to produce deformation, guarantee shooting quality and effect. The elastic component has certain pretightening force between the lens barrel and the motor carrier, and the pretightening force increases the friction force between the lens and the motor, so that the lens is prevented from shaking randomly. The pretightening force is as follows: the elastic component has a certain load in the installation state, and is used for eliminating abnormal sound and shaking of the mechanical mechanism.

Further, fig. 4 shows a schematic cross-sectional view of a lens fixing structure in an embodiment of the present application. Referring to fig. 4, in the present embodiment, the lens fixing structure includes a lens barrel 51, a carrier 52, and an elastic member 53 connecting the lens barrel 52 and the carrier 52. The elastic member 53 includes a fixing portion 531 for fixing the lens barrel and a connecting portion 532 for connecting the carrier 52. The outline of the fixing portion 531 is in a U shape, and the inside of the U-shaped fixing portion 531 forms a housing chamber, and the top of the housing chamber has an opening (i.e., the opening direction of the fixing portion 531 is the same as the opening direction of the motor carrier 52) so that the lens barrel 51 is fitted into the housing chamber from the top. In addition, the position of the lens can be adjusted according to the actual imaging result in the placing process, so that the imaging quality is improved. The bearing surface 531a of the elastic member 53 may be shaped to conform to the outer side surface of the lens barrel 51, i.e., the fixing portion 531 of the elastic member 53 may include a planar bottom wall 533 and two arc-shaped side walls 534. The two curved side walls 534 may have a preload so as to clamp the lens barrel 51 from both sides. During assembly, the lens is inserted into the accommodating cavity from the opening of the fixing portion 531, and during downward movement of the lens, the lens firstly presses the two arc-shaped side walls 534 of the elastic member 53 outwards to enlarge the opening, then the two arc-shaped side walls 534 rebound inwards under the action of elastic force after the lens is placed into the accommodating cavity, and the opening is reduced, so that the lens barrel 51 (i.e. the whole lens) is buckled in the fixing portion 531 of the elastic member 53. Because the arc-shaped side walls 534 on two sides of the elastic member 53 are symmetrically arranged, the elastic member 53 can provide stable and proper elastic force to clamp and fix the lens, so that the lens cannot fall off when the camera module shakes, and the shooting quality and the shooting effect can be ensured.

Further, in an embodiment of the present application, in order to make the fixing of the lens more firm, the opening size of the fixing portion of the elastic member is smaller than the outer diameter of the lens barrel, that is, the height of the fixing portion is higher than the optical axis of the lens barrel, and the optical axis is in a horizontal posture. Based on this design, in the process of putting the lens into the elastic member fixing portion, the opening of the fixing portion becomes large due to the elasticity of the elastic member, and after the lens is put into the fixing portion, the opening returns to the original position, fixing the lens in the elastic member.

Further, still referring to fig. 4, in one embodiment of the present application, the connection portion 532 of the elastic member 53 has one end connected to the fixing portion 531 and the other end connected to the inner side surface of the motor carrier 52. The connection portion 532 and the fixing portion 531 may be integrally formed, and the top end of the arc-shaped sidewall 534 of the fixing portion 531 is bent outwards (outwards refers to the direction away from the lens barrel) and then extends downwards to form the connection portion 532, and one end of the connection portion 432 connected to the motor carrier 52 may have an end connector, so that the elastic member 53 and the motor carrier 52 are fixed by a fastening structure, so that the elastic member 53 and the motor carrier 52 are fixed more firmly. The connection part of the elastic member 53 and the motor carrier 52 is arranged on the side wall of the motor carrier 52, so that the space of the periscope type camera module in the height direction can be not occupied, and the increase of the height of the periscope type camera module is avoided. Further, the connection portion 532 of the elastic member 53 may have a single-arm arc shape as shown in fig. 4, and the arc-shaped side walls 534 at both sides of the fixing portion 531 are connected to one connection portion 532. In another embodiment, the connecting portion may also be U-shaped, i.e. it has two arms and a bending section between the two arms, and the curved side walls on both sides of the fixing portion are each connected to one such U-shaped connecting portion. In a further embodiment, the connecting portion may also be a serpentine shape consisting of a plurality of U-shapes, i.e. the connecting portion has a plurality of arc-shaped arms and a plurality of bending sections connecting the arc-shaped arms, and the arc-shaped side walls on both sides of the fixing portion are each connected to one such serpentine-shaped connecting portion.

Further, fig. 5 shows an enlarged partial schematic view of the snap connection between the motor carrier and the resilient member in one embodiment of the present application. Referring to fig. 5, in the lens fixing structure of the present embodiment, a T-shaped protrusion is disposed on an inner side wall of the motor carrier 52, and the T-shaped protrusion may be integrally formed with the motor carrier. The T-shaped protrusion has a neck 521 and an end 522, and the neck 521 is smaller in size than the end 522 thereof, so that the end connector of the elastic member 53 is not detached by itself after being engaged with the T-shaped protrusion of the motor carrier 52. Further, the end of the T-shaped protrusion of the motor carrier may have an inclined slope 522a with an inclination angle α satisfying 90 ° < α < 180 ° to facilitate engagement of the end connector of the elastic member with the T-shaped protrusion. The end connector of the elastic member 53 is provided with an opening in a position corresponding to the T-shaped protrusion on the motor carrier, the shape of the opening being matched with the shape of the neck 521 of the T-shaped protrusion, so that the T-shaped protrusion can extend into the opening, and the motor carrier 52 and the elastic member 53 are fixed by the snap-fit structure. In this embodiment, the number of the fastening structures at the connection between the motor carrier 52 and the elastic member 53 may be one or more, which is not limited in this application.

Further, fig. 6a shows a schematic cross-sectional view of a lens fixing structure according to another embodiment of the present application. Fig. 6b shows an enlarged partial schematic view of a snap connection between a motor carrier and a resilient member in another embodiment of the present application. Referring to fig. 6a and 6b, in the lens fixing structure, a groove 57 is provided on the inner side wall of the motor carrier 52, and a T-shaped protrusion is provided on the end connector of the elastic member 53, and the T-shaped protrusion and the connection portion 532 of the elastic member 53 may be integrally formed. The neck 55 of the T-shaped protrusion is smaller in size than the end 56 thereof so that the end connector of the resilient member does not fall off itself after being snapped into the recess 57 of the motor carrier 52. The end 56 of the T-shaped projection has an inclined slope with an inclination angle α satisfying 90 ° < α < 180 ° to facilitate engagement of the T-shaped projection of the end connector of the resilient member with the recess of the motor carrier. The position of the T-shaped bulge is opposite to the position of the groove, and the shape of the neck of the T-shaped bulge is matched with that of the groove. In this embodiment, the number of the fastening structures at the connection position of the motor carrier and the elastic member may be one or more, which is not limited in this application.

Fig. 7a shows a schematic cross-sectional view of a lens fixing structure in a further embodiment of the present application. Fig. 7b shows an enlarged partial schematic view of a snap connection between a motor carrier and a resilient member in a further embodiment of the present application. Referring to fig. 7a and 7b, in still another embodiment of the present application, in the lens fixing structure, the end connector of the elastic member 53 may be further fixed to the inner side wall of the motor carrier 52 by means of adhesion, and although the adhesive is applied between the elastic member 53 and the motor carrier 52, the stress generated by curing the adhesive is counteracted by the elastic member and cannot be transmitted to the lens, so that the stress of the lens is not affected, and the imaging quality of the lens may be ensured.

Fig. 8a shows a schematic cross-sectional view of a lens fixing structure in still another embodiment of the present application. Fig. 8b shows an enlarged partial schematic view of a snap connection between a motor carrier and a resilient member in a further embodiment of the present application. Referring to fig. 8a and 8b, in still another embodiment of the present application, in the lens fixing structure, a fastening structure between the elastic member 53 and the motor carrier 52 may be configured to be fastened by a male fastener and a female fastener. Specifically, a female buckle can be arranged on the end connector of the elastic component, a male buckle can be arranged on the inner side wall of the motor carrier, the positions of the male buckle and the female buckle are opposite, and the elastic component and the motor carrier are fixed through the clamping of the male buckle and the female buckle. Or the positions of the male buckle and the female buckle can be exchanged, namely, the male buckle is arranged on the end connecting piece of the elastic component, and the female buckle is arranged on the inner side wall of the motor carrier.

In the present application, the structure of the elastic member and the way of fastening the elastic member, the lens, and the motor carrier are not limited to the way described in the above embodiments, as long as the elastic member is enabled to realize its function and is fixed between the lens and the motor carrier.

Fig. 9 is a perspective view showing a lens fixing structure in one embodiment of the present application. Referring to fig. 9, in the present embodiment, the optical axis of the lens 21 coincides with the Y-axis direction, and takes a horizontal posture. Let the lens 21 (refer to fig. 2 in combination) have a length L in the optical axis direction. The length (dimension in the optical axis direction) of the elastic member (the elastic member is shielded and thus not directly shown in fig. 9) is not greater than the length L of the lens 21. That is, the length of the elastic member may be exactly matched (substantially the same as) the length of the lens 21, or may be smaller than the length of the lens 21. In this embodiment, the lens 21 includes a plurality of lenses, and the radial dimensions (radial direction refers to the direction perpendicular to the optical axis) of different sections of the lens may also be different according to the radial dimensions of the lenses. For example, in fig. 9, the radial dimension of the intermediate section 21b of the lens 21 is smaller than the radial dimension of the front end section 21a (the section near the object side end) thereof and larger than the radial dimension of the rear end section 21c (the section near the image side end) thereof. In this embodiment, the elastic member may be provided at the intermediate section 21b of the lens 21. Since the intermediate section 21b is smaller in radial dimension than its front end section 21a, there is a gap between the intermediate section 21b of the lens 21 and the carrier 23 sufficient to accommodate the elastic member. On the other hand, the length of the elastic member (i.e., the dimension in the Y-axis direction) may be adapted to the length of the intermediate section 21b of the lens. Since the elastic member is provided in the middle section 21b of the lens, the balancing of the front and rear weights of the lens is also facilitated, and the firmness of the lens fixing structure is improved. Further, in the present embodiment, in the elastic member, the length of the fixing portion thereof (refer to the dimension in the Y-axis direction) and the length of the connecting portion (refer to the dimension in the Y-axis direction) may be substantially the same.

In another embodiment, the elastic member may also be provided at an end section (e.g., a front end section or a rear end section) of the lens. Preferably, the elastic member is provided at one end of the lens where optical sensitivity (hereinafter simply referred to as sensitivity) is high, that is, the influence on the imaging effect is greater when the lens changes. The elastic component is arranged at one end of the lens with higher sensitivity to cancel the glue, so that the influence of stress on the surface shape of the lens with high sensitivity when the glue is solidified can be avoided, and the imaging quality is better ensured.

Further, in a preferred embodiment, the elastic member is disposed at an end of the barrel where the radial dimension is smaller (e.g., a rear end section of the barrel). For the tele camera module, since it has a smaller angle of view, to fit the smaller angle of view, the lenses other than the first lens may be designed to be smaller in size. Like this the less one end of lens size can have bigger space, set up the elastic component in the less one end of lens size, can be with the space make full use of between camera lens and the carrier, improve the space utilization of the module of making a video recording for the structure of module is compacter, and then helps the module to realize miniaturization.

Further, in some embodiments of the present application, the elastic member may be a spring, a leaf spring, or other elastic element.

Further, according to an embodiment of the present application, there is also provided an assembling method of the lens fixing structure, including: putting the lens into the accommodating cavity of the elastic member in a pressing manner, and fixing the lens through the fixing part of the elastic member; the semi-finished product formed by the lens and the elastic component is placed into the motor carrier, the end connector of the elastic component is clamped with the buckling piece of the motor carrier, and the elastic component is fixed on the motor carrier through the buckling structure between the elastic component and the motor carrier. Further, in order to make the fixation of the elastic member and the motor carrier firmer, in this embodiment, glue may be further added to the snap structure to reinforce the snap connection, so as to prevent the elastic member from falling off. In the assembly process, the elastic component can generate certain deformation under the extrusion force of the lens, but after the assembly is completed, the elastic component can basically return to the original shape through the elasticity.

Still further referring to fig. 2, in one embodiment of the present application, the periscope type camera module 10 may include a reflecting element 11 and a reflecting element carrier 12, where the reflecting element 11 is a mirror or a prism. The reflecting element 11 is adapted to turn the light vertically entering the camera module from the light window 13 by 90 ° and turn the optical axis of the incident end of the reflecting element 11 in the vertical direction to the horizontal direction of the exit end. The reflective element 11 may bear against a reflective element carrier 12. In some embodiments, the optical path turning component 10 may further include a driving element 14, where the driving element 14 is disposed on the reflective element carrier 12 to drive the reflective element 11 to rotate or translate, so as to implement optical anti-shake of the periscope type camera module.

Still further referring to fig. 2, in one embodiment of the present application, the photosensitive assembly 30 includes a filter element 31 and a photosensitive element 32, where the filter element 31 includes a filter support 31a and a filter 31b mounted on the filter support 31a, and the filter 31b is attached to the filter support 31a and is used for filtering infrared light. The photosensitive element 32 includes a photosensitive chip 32a and a circuit board 32b, the photosensitive chip 32a is mounted on the surface of the circuit board 32b, the filter support 31a and the filter 31b are disposed at the front end of the photosensitive chip 32a, and the filter support 31a is attached to the circuit board 33 b.

Further, in a preferred embodiment of the present application, the optical path turning component, the lens component and the photosensitive component are actively calibrated and then fixed during the assembly process, so as to ensure that the deviation between the optical axis of the lens and the central position of the photosensitive component is within a preset tolerance range, thereby realizing the consistency of the optical axis. The active calibration is to adjust the relative positions of the optical path turning component, the lens component and the photosensitive component according to the actually measured imaging result of the photosensitive component, so as to obtain an optical system with standard imaging quality. In actual assembly, the assembly can be performed based on the active calibration result, so that the relative positions among the light path turning component, the lens component and the photosensitive component are kept at the relative positions determined by the active calibration.

Further, in one embodiment of the present application, the housing 40 of the periscope type camera module includes a base 41 and a cover 42, where the cover 42 has a window, and the window may be used as a light entrance (i.e. the light window 13) of the periscope type camera module, so that the periscope type camera module can receive the light reflected by the object. The cover is fixed to the base, and a space between the cover 42 and the base 41 forms a cavity for accommodating the optical path turning component 10, the lens component 20 and the photosensitive component 30. It should be noted that the optical path turning component 10 and the lens component 20 may be fixed on the same base 41, or may be fixed on two separate bases. For example, in another embodiment of the present application, the base includes a first base and a second base that are separated from each other, the second base carries the lens assembly and the photosensitive assembly, and the first base carries the optical path turning assembly.

Further, fig. 10 shows a schematic cross-sectional view of a lens fixing structure in a modified embodiment of the present application. Referring to fig. 10, in the present embodiment, the fixing portion of the elastic member 53 may be directly embedded in the lens barrel 51. In particular, the fixing portion 531 of the elastic member 53 may be inserted during the molding of the lens barrel 51 through an insert injection molding process. Since the lens barrel 51 and the fixing portion 531 of the elastic member 53 are integrally formed, they can be firmly connected and fixed. The shape of the fixing portion 531 in this embodiment may be similar to that shown in fig. 4. That is, the fixing portion may also include a planar bottom wall and two arc-shaped side walls.

Further, fig. 11 shows a schematic cross-sectional view of a lens fixing structure in another modified embodiment of the present application. Referring to fig. 11, in the present embodiment, the fixing portion 531 of the elastic member 53 may be directly embedded in the lens barrel 51. The embedding method may be similar to the previous embodiment shown in fig. 10. The difference between this embodiment and the previous embodiment is that the fixing portion may include only two arc-shaped side walls 534, and the planar bottom wall may be omitted, that is, in this embodiment, the elastic member 53 may include two separate sub-members each including one arc-shaped side wall 534 and the connection portion 532 connected thereto. Also, the arc-shaped side walls 534 of each sub-member are respectively embedded in one side wall (e.g., the left side wall or the right side wall of the barrel) of the barrel 51.

Further, fig. 12 is a schematic cross-sectional view showing a lens fixing structure in still another modified embodiment of the present application. Referring to fig. 12, in the present embodiment, the fixing portion of the elastic member may include only two arc-shaped side walls 534, and each arc-shaped side wall 534 has an arc-shaped bearing surface adapted to bear against the outer side surface of the lens barrel 51. And the end of each arc-shaped sidewall 534 is connected to the lens barrel 51 by a snap-fit structure. Specifically, the free end of the curved sidewall 534 is positioned lower and the end thereof connected to the connection portion 532 is positioned higher. The free ends of the curved side walls 534 may be provided with snap-fit or snap-fit structures to connect with the outer side of the barrel 51. The connecting end of the arc-shaped side wall 534 is bent outwards and then extends downwards to form the connecting portion 532, the connecting portion 532 is in a single-arm arc shape, and the free end of the connecting portion 532 is also connected with the inner side surface of the carrier 52 through a fastening structure.

In the modified embodiment, the snap connection may be replaced by glue connection, or reinforced by glue on the basis of the snap connection.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

A lens fixing structure for an optical actuator, comprising:

a carrier adapted for controlled movement under the drive of the optical actuator;

the inner side surface of the lens barrel is suitable for mounting a lens; and

an elastic member including a fixing portion for connecting the lens barrel and a connecting portion for connecting the carrier;

the fixing part comprises two arc-shaped side walls which are respectively supported on the outer side surfaces of the two sides of the lens barrel or are respectively embedded into the lens barrel.
The lens fixing structure according to claim 1, wherein the fixing portion further comprises a planar bottom wall, the two arc-shaped side walls and the bottom wall are connected into a whole, and the two arc-shaped side walls respectively bear against outer side surfaces of two sides of the lens barrel so as to fasten the lens barrel between the two arc-shaped side walls and the bottom wall.
The lens fixing structure according to claim 2, wherein the bottom end of the arc-shaped side wall is connected to the bottom wall, and the top end of the arc-shaped side wall is bent outwards and extends downwards to form the connecting portion.
The lens fixing structure of claim 2, wherein the connecting portion is a curved single arm, or is U-shaped, or is a serpentine shape formed by a plurality of U-shapes.
The lens fixing structure according to claim 1, wherein the fixing portion is embedded in a side wall of the lens barrel by an insert injection molding process.
The lens fixing structure according to claim 2, wherein a top end position of the fixing portion is higher than a center axis position of the lens barrel.
The lens fixing structure according to claim 2, wherein a tip end of the fixing portion has an opening, and a width of the opening is smaller than a diameter of an outer contour of the lens barrel.
The lens fixing structure of claim 1, wherein the two arc-shaped side walls are separated and are respectively embedded in both sides of the lens barrel.
The lens fixing structure according to claim 1, wherein the two arc-shaped side walls are separated, the two arc-shaped side walls are respectively supported against outer side surfaces of two sides of the lens barrel, and bottom ends of the two arc-shaped side walls are respectively connected with the lens barrel through a fastening structure.
The lens fixing structure according to claim 1, wherein the top end of the arc-shaped side wall is bent outwards and extends downwards to form the connecting portion, and the bottom end of the connecting portion is connected with the inner side surface of the carrier through a fastening structure.
The lens fixing structure of claim 1, wherein the top end of the arc-shaped side wall is bent outwards and extends downwards to form the connecting part, and the bottom end of the connecting part is bonded with the inner side surface of the carrier.
The lens fixing structure of claim 10, wherein the connection of the bottom end of the connection portion and the inner side surface of the carrier is reinforced by glue.
The lens fixing structure of claim 10, wherein the snap structure is a male snap and a female snap.
The lens fixing structure of claim 10, wherein the connecting portion has an end connecting member, and the inner side of the carrier has a T-shaped protrusion including a neck portion and an end portion having a width larger than that of the neck portion; the end connector is provided with an opening, and the shape of the opening is matched with that of the neck of the T-shaped bulge.
The lens fixing structure of claim 10, wherein the connection part has an end connection member having a T-shaped protrusion including a neck portion and an end portion having a width larger than that of the neck portion; the inner side surface of the carrier is provided with a groove, and the shape of the neck of the T-shaped bulge is matched with the shape of the groove.
The lens fixing structure according to claim 14 or 15, wherein an end portion of the T-shaped protrusion has an inclined surface, and an inclination angle α of the inclined surface satisfies 90 ° < α < 180 °.
A camera module, comprising: the optical path turning component, the lens component and the photosensitive component are arranged in the shell;

the lens assembly includes the lens fixing structure for an optical actuator according to any one of claims 1 to 16.
The camera module of claim 17, wherein the lens fixing structure has a plurality of lenses mounted therein, the lens barrel including at least one fitting section for mounting the elastic member, the fitting section having a lens mounted therein with a smaller diameter than lenses mounted in other sections of the lens barrel.
The camera module of claim 17, wherein the lens fixing structure has a plurality of lenses mounted therein, the lens barrel including at least one fitting section for mounting the elastic member, the fitting section having lenses mounted therein having optical sensitivity higher than those of lenses mounted in other sections of the lens barrel.
The camera module of claim 17, wherein the top side of the carrier is open; the lens barrel is internally provided with a plurality of lenses, wherein the outer contour of at least one lens is in a cutting circle shape, and one cutting edge of the lens, the outer contour of which is in the cutting circle shape, is positioned at the top side.