CN113376791A

CN113376791A - Lens structure, camera module and electronic equipment

Info

Publication number: CN113376791A
Application number: CN202110725047.4A
Authority: CN
Inventors: 王丽青
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-09-10

Abstract

The invention discloses a lens structure, a camera module and an electronic device, wherein the lens structure comprises a lens barrel, an optical lens and a press ring, the optical lens is arranged in the lens barrel, the press ring is arranged at an image side end of the lens barrel and extends out of the lens barrel from the inside of the lens barrel, a first end surface of the press ring is positioned outside the lens barrel, in the optical axis direction, the distance from the first end surface to the image side surface of the lens barrel is larger than the distance from the point, farthest from the object side surface of the optical lens to the image side surface of the lens barrel, a second end surface of the press ring is positioned in the lens barrel and is arranged opposite to the first end surface, the inner peripheral surface of the press ring is a conical surface arranged around the optical axis, the inner diameter of the press ring is gradually increased along the direction from the object side end of the lens barrel to the image side end of the lens barrel, and a first chamfer is arranged at the joint of the inner peripheral surface and the second end surface. By adopting the scheme, the lens cone can be stably molded, the optical lens is prevented from protruding out of the pressing ring, and the pressing ring is utilized to protect the optical lens so as to reduce the risk of scratching and polluting the optical lens; but also contributes to improving the imaging quality.

Description

Lens structure, camera module and electronic equipment

Technical Field

The invention relates to the technical field of camera shooting, in particular to a lens structure, a camera shooting module and electronic equipment.

Background

As shown in fig. 1, in the related art, if the diameter of the image side end of the lens barrel

Too large easily interferes with the motor or base structure, affecting assembly, and therefore, the diameter of the image side end of the lens barrel

Generally not too large. In order to prevent the optical lens from protruding out of the lens barrel (i.e., H1 > 0mm, where H1 is the distance from the most protruding position on the optical lens to the outer end surface of the lens barrel), it is generally necessary to control the angle α between the outer peripheral surface and the inner wall surface of the image-side end of the lens barrel in a relatively large range, and also to control the thickness H2 of the image-side end of the lens barrel in a relatively small range. However, if the thickness H2 of the image side end of the lens barrel is controlled within a relatively small range, the image side end of the lens barrel is at risk of material shortage and breakage, and the lens barrel is also at risk of being pulled and damaged during molding and demolding of the lens barrel, which affects the molding of the lens barrel; however, if the thickness H2 of the image-side end of the lens barrel needs to be controlled within a relatively large range to ensure the molding of the lens barrel, the optical lens may protrude out of the lens barrel, which may scratch and dirty the optical lens during subsequent production, and the yield of the lens structure may be affected.

Disclosure of Invention

The embodiment of the invention discloses a lens structure, a camera module and electronic equipment, which can prevent an optical lens from protruding out of a lens cone while ensuring the molding of the lens cone, and reduce the risks of scratching and polluting the optical lens; but also contributes to improving the imaging quality.

In order to achieve the above object, in a first aspect, the present invention discloses a lens structure, including a lens barrel, an optical lens, and a press ring, where the optical lens is disposed in the lens barrel, the press ring is disposed at an image side end of the lens barrel, and extends from the inside of the lens barrel to the outside of the lens barrel in an optical axis direction, the press ring has a first end surface, a second end surface, and an inner peripheral surface, the first end surface is located outside the lens barrel, and in the optical axis direction, a distance from the first end surface to an image side surface of the lens barrel is greater than a distance from an aspheric highest point of the optical lens to the image side surface of the lens barrel, the second end surface is located in the lens barrel and is disposed opposite to the first end surface, the second end surface is used for abutting against the optical lens, and the inner peripheral surface is connected to the first end surface and the second end surface respectively;

the inner peripheral surface is a conical surface arranged around an optical axis, the inner diameter of the pressing ring is gradually increased along the direction from the object side end of the lens barrel to the image side end of the lens barrel, and a first chamfer is arranged at the joint of the inner peripheral surface and the second end surface.

In the lens structure provided by the application, the press ring is arranged and is configured to extend from the inside of the lens barrel to the outside of the lens barrel in the optical axis direction, so that the length of the image side end of the lens barrel in the optical axis direction can be compensated by using the press ring, the length of the image side end of the lens barrel in the optical axis direction is shortened, the thickness of the image side end of the lens barrel can be controlled in a larger range, and the stability in molding of the lens barrel is ensured; and still configure the clamping ring to in the optical axis direction, the distance of the first terminal surface of clamping ring to the image side of lens cone is greater than the distance of the aspheric surface peak of optical lens to the image side of lens cone for optical lens can not bulge outside the clamping ring, consequently, adopt the clamping ring that this application provided, can avoid optical lens to bulge outside clamping ring (lens cone) when guaranteeing the shaping of lens cone, reduce the risk of scratch, pollution optical lens.

Furthermore, a first chamfer is arranged at the joint of the second end face and the inner circumferential surface, so that a sharp corner can be avoided, the situation that the stress at the joint of the second end face and the inner circumferential surface is too concentrated to cause cracks and even fracture is avoided, and the service life of the pressure ring is prolonged; but also can avoid producing deckle edge, because deckle edge is thinner, thereby partial light can see through this deckle edge and produce the miscellaneous light, consequently, through the second terminal surface with the chamfer processing is done to the junction of inner peripheral surface, still is favorable to avoiding producing miscellaneous light, improves image quality.

As an alternative implementation, in an embodiment of the first aspect of the invention, the surface of the first chamfer is provided with a first light extinction structure. Therefore, the reflected stray light on the inner surface of the first chamfer can be weakened by the first extinction structure, and the imaging quality is further improved.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, in a direction perpendicular to the optical axis, a thickness of an end of the pressing ring located outside the lens barrel is greater than or equal to 0.15 mm. Through lieing in with the clamping ring the thickness control of the outer one end of lens barrel is in the within range that is more than or equal to 0.15mm, can guarantee the shaping of clamping ring is stable for the clamping ring has higher size precision and surface accuracy, in order to improve the measurement stability of lens structure.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, a maximum outer diameter of an end of the pressing ring located outside the lens barrel is smaller than or equal to an outer diameter of an image side end of the lens barrel. The maximum outer diameter of one end, located outside the lens barrel, of the pressing ring is controlled to be smaller than or equal to the outer diameter of the image side end of the lens barrel, so that the pressing ring is prevented from interfering with other parts of the camera module when the lens structure is matched with the other parts (such as a motor or a base) of the camera module, and the camera module can be normally assembled.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the outer circumferential surface of the pressing ring is provided with a groove;

the groove and the inner wall surface of the lens barrel are enclosed to form a glue containing space, and the glue containing space is used for containing a bonding medium to fix the pressing ring on the lens barrel. The bonding mode is simpler, and the bonding intensity is higher, the cost is lower, the quality is lighter. Or the image side face of the image side end of the lens barrel is provided with a fixing part, the fixing part is bent towards the groove to abut against the inner wall face of the groove so as to fix the pressing ring on the lens barrel, and the fixing connection mode does not need glue dispensing, so that the condition that an adhesive medium enters the optical lens can be avoided, and the risk of polluting the optical lens is reduced.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the image side surface of the lens barrel is provided with the fixing portion, the fixing portion is an annular structure disposed around an optical axis, the fixing portion is bent toward the groove, and an inner annular surface of the fixing portion abuts against an inner wall surface of the groove. Through the interior anchor ring butt of injecing the fixed part in the internal face of recess, promptly the fixed part orientation when the recess is buckled, the interior anchor ring of fixed part can with the internal face looks adaptation of recess, laminating are convenient for make the interior anchor ring of fixed part with the internal face of recess is closely laminated, thereby is favorable to improving the clamping ring with the stability of being connected between the lens cone.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the groove includes a bottom surface disposed opposite to the inner circumferential surface, a direction perpendicular to the bottom surface and away from the optical axis is a first direction, and a width of the groove in a direction parallel to the bottom surface is gradually increased along the first direction, that is, an included angle that may be formed between an inner side wall surface of the groove and the bottom surface of the groove is a right angle or an obtuse angle, and on one hand, a sharp angle can be avoided, so that a situation that a crack or even a fracture occurs due to too concentrated stress at a connection point of the bottom surface of the groove and the inner side wall surface of the groove can be avoided, and the service life of the compression ring is prolonged; on the other hand, when the compression ring is formed by utilizing the die machining, the die drawing is convenient.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the groove includes a bottom surface disposed opposite to the inner circumferential surface, the bottom surface is disposed in parallel with the inner circumferential surface, and a distance between the bottom surface and the inner circumferential surface in a direction perpendicular to the bottom surface is greater than or equal to 0.20 mm. It can be understood, the thickness of the thinnest department of clamping ring is the distance between bottom surface and the inner peripheral surface, consequently, through with the bottom surface extremely distance control between the inner peripheral surface of clamping ring is in the within range of more than or equal to 0.20mm, can avoid the thickness of clamping ring to be too thin, in order to ensure that whole clamping ring has sufficient intensity, be favorable to making the thickness everywhere of clamping ring lead to unanimously, thereby be favorable to improving the life of clamping ring, moreover, when the equipment clamping ring, clamping ring non-deformable, the equipment of the clamping ring of being convenient for, simultaneously when the shaping clamping ring, the clamping ring is also yielding, the machine-shaping of the clamping ring of being convenient for.

As an alternative, in an embodiment of the first aspect of the invention, the groove comprises a bottom surface arranged opposite to the inner circumferential surface, the bottom surface being provided with a reinforcement rib.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the outer peripheral surface of the pressing ring has an abutting surface for abutting against an inner wall of the lens barrel, the abutting surface is connected to the second end surface and an inner side wall surface of the groove, and a distance between the second end surface and the inner side wall surface of the groove is greater than or equal to 0.13mm in the optical axis direction, so that it is ensured that a size of the pressing ring in cooperation with the lens barrel is large, a contact area between the pressing ring and the lens barrel is large, connection stability between the pressing ring and the lens barrel is improved, and the pressing ring is convenient to be limited and fixed in the lens barrel.

As an alternative, in an embodiment of the first aspect of the present invention, the inner circumferential surface is provided with a second light extinction structure. Through setting up second extinction structure, can weaken the reflection stray light of the inner peripheral surface of clamping ring, promote the imaging quality of the lens structure that this application provided.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the second light extinction structure is multiple, and multiple second light extinction structures are sequentially disposed around the optical axis along the optical axis direction, or multiple second light extinction structures are disposed radially with the optical axis as a center. In the two types of arrangement, the reflected stray light on the inner peripheral surface of the pressure ring can be effectively attenuated regardless of the arrangement of the second light extinction structure.

In a second aspect, the present invention discloses a camera module having the lens structure as described in the first aspect. The camera module with the lens structure can prevent the optical lens from protruding out of the compression ring (lens barrel) while ensuring the molding of the lens barrel, and reduces the risk of scratching and polluting the optical lens.

In a third aspect, the invention discloses an electronic device, which has the camera module set of the second aspect. The electronic equipment with the camera module can prevent the optical lens from protruding out of the compression ring (lens cone) while ensuring the molding of the lens cone, and reduces the risk of scratching and polluting the optical lens.

Compared with the prior art, the invention has the beneficial effects that:

(1) the forming of the lens cone can be ensured, and meanwhile, the risks of scratching and polluting optical lenses are reduced. According to the lens structure, the camera module and the electronic device provided by the embodiment of the invention, the press ring is arranged, and in the optical axis direction, the press ring extends from the inside of the lens barrel to the outside of the lens barrel, so that the length of the image side end of the lens barrel in the optical axis direction can be compensated by using the press ring, the length of the image side end of the lens barrel in the optical axis direction is shortened, the thickness of the image side end of the lens barrel can be controlled in a relatively large range (for example, the range is more than or equal to 0.15 mm), and the stable forming of the lens barrel is ensured; and still configure the clamping ring to in the optical axis direction, the distance of the first terminal surface of clamping ring to the image side of lens cone is greater than the distance of the aspheric surface peak of optical lens to the image side of lens cone for optical lens can not bulge outside the clamping ring, consequently, adopt the clamping ring that this application provided, can avoid optical lens to bulge outside clamping ring (lens cone) when guaranteeing the shaping of lens cone, reduce the risk of scratch, pollution optical lens.

(2) The service life of the pressure ring is prolonged, and the problem of stray light is solved. The first chamfer is arranged at the joint of the second end face and the inner peripheral face of the pressure ring, so that a sharp corner can be avoided, the situation that the stress at the joint of the second end face and the inner peripheral face is too concentrated to cause cracks and even breakage is avoided, and the service life of the pressure ring is prolonged; but also can avoid producing deckle edge, because deckle edge is thinner, thereby partial light can see through this deckle edge and produce the miscellaneous light, consequently, do the chamfer through the junction at second terminal surface and inner peripheral surface and handle, still be favorable to avoiding producing miscellaneous light, improve formation of image quality.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a sectional view of a lens structure disclosed in the related art;

fig. 2 is a first structural schematic diagram of a lens structure disclosed in the embodiment of the invention;

FIG. 3 is a cross-sectional view of the lens structure of FIG. 2 taken along the direction A-A;

fig. 4 is a partial enlarged view at K in fig. 3;

FIG. 5 is a schematic view of the surface of the first chamfer of FIG. 4 provided with a first light extinction structure;

FIG. 6 is an exploded view of the lens structure of FIG. 3;

FIG. 7 is a schematic diagram of a second structure of a lens structure according to an embodiment of the disclosure;

FIG. 8 is a cross-sectional view of the lens structure of FIG. 7 taken along the direction a-a;

FIG. 9 is a schematic view of the structure of FIG. 8 with the fixing portion bent and abutting against the inner wall surface of the recess;

fig. 10 is a schematic perspective view of a first embodiment of a pressure ring according to the present invention;

FIG. 11 is a front view of the pressure ring of FIG. 10;

FIG. 12 is a cross-sectional view of the pressure ring of FIG. 11 taken along the line B-B;

fig. 13 is a partial enlarged view at N in fig. 12;

FIG. 14 is a schematic view of the structure of FIG. 13 with ribs on the bottom surface of the grooves;

fig. 15 is a schematic perspective view of a second embodiment of the pressure ring according to the present invention;

FIG. 16 is a front view of the pressure ring of FIG. 15;

FIG. 17 is a cross-sectional view of the pressure ring of FIG. 16 taken along the direction C-C;

FIG. 18 is a schematic view of a third alternative embodiment of the pressure ring according to the present disclosure;

figure 19 is a front view of the pressure ring of figure 18;

figure 20 is a cross-sectional view of the pressure ring of figure 19 taken along the direction D-D;

fig. 21 is a schematic structural diagram of a camera module disclosed in the embodiment of the present invention;

fig. 22 is a schematic structural diagram of an electronic device disclosed in the embodiment of the present invention.

Icon: 100. a lens structure; 10. a lens barrel; 101. an image side end; 102. an image side; 103. a fixed part; 1031. an inner ring surface; 11. an optical lens; 12. pressing a ring; 121. a first end face; 122. a second end face; 122a, a first extinction structure; 123. an inner peripheral surface; 124. an outer peripheral surface; 125. a groove; 1250. an inner wall surface; 1251. a bottom surface; 1251a, reinforcing ribs; 1252. an inner sidewall surface; 1252a, first portion; 1252b, second portion; 126. an abutting surface; 127. a second light extinction structure; 200. a camera module; 201. an image sensor; 300. an electronic device; 301. an apparatus housing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

It is understood that, as shown in fig. 1, in the related art, if the diameter of the image side end 101 of the lens barrel 10 is large, the diameter of the image side end 101 is large

The diameter of the image side end 101 of the lens barrel 10 is too large to easily interfere with the motor or base structure of the image pickup module and interfere with assembly

Generally not too large. In order to prevent the optical lens 11 from protruding out of the lens barrel 10 (i.e., H1 > 0mm, where H1 is the distance from the most protruding position on the optical lens 11 to the outer end surface of the lens barrel 10), the thickness H2 of the image side end 101 of the lens barrel 10 needs to be less than 0.15mm, and the angle α between the outer peripheral surface of the image side end 101 of the lens barrel 10 and the inner wall surface needs to be greater than or equal to 5 °. However, if H2 < 0.15mm, the image side end 101 of the lens barrel 10 risks starving and breakage; in addition, there is a risk that the lens barrel 10 is pulled when the lens barrel 10 is molded and released from the mold, which affects the molding of the lens barrel 10. Therefore, in order to ensure the molding of the lens barrel 10, H2 is generally required to be 0.15mm or more, but this is doneThe optical lens 11 protrudes out of the lens barrel 10, and the optical lens 11 is easily scratched and contaminated during subsequent production, which affects the yield of the lens structure 100.

Based on this, this application discloses a camera lens structure, can avoid outside the lens barrel of optical lens protrusion department, reduce the risk of scratch, pollution optical lens when guaranteeing the shaping of lens barrel.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Referring to fig. 2 and 3, an embodiment of the invention discloses a lens structure, which can be applied to a camera module of an electronic device (e.g., a mobile phone, a tablet computer, a notebook computer, a smart watch, etc.) to receive an optical signal of a subject and project the optical signal to an image sensor of the camera module. The lens structure 100 may include a lens barrel 10, an optical lens 11 and a pressing ring 12, the optical lens 11 is disposed in the lens barrel 10, the pressing ring 12 is disposed at an image side end 101 of the lens barrel 10, and the pressing ring 12 may be used to press the optical lens 11 in the lens barrel 10. The pressing ring 12 extends from the inside of the lens barrel 10 to the outside of the lens barrel 10 in the optical axis direction O.

Specifically, as shown in fig. 3 and 4, the pressing ring 12 has a first end surface 121, a second end surface 122, and an inner circumferential surface 123, the first end surface 121 is located outside the lens barrel 10, and in the optical axis direction O, a distance h1 from the first end surface 121 to the image side surface 102 of the lens barrel 10 is greater than a distance h2 from a point of the optical lens 11 farthest from the object side surface of the lens barrel 10 to the image side surface 102 of the lens barrel 10, that is, h1-h2 is greater than 0mm, so that the optical lens 11 does not protrude out of the pressing ring 12, thereby reducing risks of scratching and contaminating the optical lens 11, and enabling the pressing ring 12 to play a role in pressing and fixing the optical lens 11 in the lens barrel 10 and also play a role in protecting the optical lens 11. The second end surface 122 is located in the lens barrel 10 and disposed opposite to the first end surface 121, the second end surface 122 is used for abutting against the optical lens 11 to press the optical lens 11 in the lens barrel 10, and the inner peripheral surface 123 is connected to the first end surface 121 and the second end surface 122 respectively. The inner peripheral surface 123 is a conical surface disposed around the optical axis, the inner diameter of the compression ring 12 gradually increases along a direction from the object side end of the lens barrel 10 to the image side end 101 of the lens barrel 10, and a first chamfer R1 is provided at a joint of the inner peripheral surface 123 and the second end surface 122 to prevent burrs from being generated at the joint of the second end surface 122 and the inner peripheral surface 123, thereby facilitating to prevent stray light and improving the imaging quality.

In summary, in the lens structure 100 provided by the present application, the pressing ring 12 is disposed, and the pressing ring 12 is configured to extend from the inside of the lens barrel 10 to the outside of the lens barrel 10 in the optical axis direction O, so that the length of the image side end 101 of the lens barrel 10 in the optical axis direction O can be compensated by using the pressing ring 12, and the length of the image side end 101 of the lens barrel 10 in the optical axis direction O can be shortened, so that the thickness of the image side end 101 of the lens barrel 10 can be controlled in a relatively large range, for example, the thickness of the image side end 101 of the lens barrel 10 can be controlled in a range greater than or equal to 0.15mm, so as to ensure that the molding of the lens barrel 10 is stable; still through injecing on optical axis direction O simultaneously, the distance h1 of the first terminal surface 121 of clamping ring 12 to the image side 102 of lens cone 10 is greater than the optical lens 11 and is far away from the object side of lens cone 10 to the distance h2 of the image side 102 of lens cone 10 for optical lens 11 can not bulge outside clamping ring 12, consequently, the lens structure 100 that this application provided is through rational arrangement and assembly clamping ring 12 can avoid optical lens 11 to bulge outside clamping ring 12 (lens cone 10) when guaranteeing that the lens cone 10 shaping is stable, utilizes clamping ring 12 protects optical lens 11, in order to reduce the scratch, pollute optical lens 11's risk.

Moreover, a first chamfer R1 (such as a fillet or a chamfer) is arranged at the joint of the second end face 122 and the inner circumferential surface 123, so that a sharp corner can be avoided, the situation that the stress at the joint of the second end face 122 and the inner circumferential surface 123 is too concentrated to cause cracks or even fracture can be avoided, and the service life of the pressure ring 12 is prolonged; and also can avoid producing deckle edge, because deckle edge is thinner, thereby partial light can see through this deckle edge and produce the miscellaneous light, consequently, through do the chamfer processing at the junction of second terminal surface 122 and inner peripheral surface 123, still be favorable to avoiding producing miscellaneous light, improve image quality.

In some embodiments, as shown in fig. 5, the surface of the first chamfer R1 may be provided with a first light extinction structure 122a, the first light extinction structure 122a may be a protrusion or a groove provided on the surface of the first chamfer R1, or the first light extinction structure 122a may be a protrusion formed by performing surface roughening treatment on the surface of the first chamfer R1, and so on. In other words, by providing the first light extinction structure 122a on the surface of the first chamfer R1, the surface of the first chamfer R1 is made rougher, and when light is incident on the roughened surface of the first chamfer R1, stray light interfering with the imaging of the lens structure 100 is not easily reflected by the roughened surface, that is, by increasing the roughness of the surface of the first chamfer R1, the reflected stray light on the surface of the first chamfer R1 can be weakened, thereby further improving the imaging quality of the lens structure 100 provided by the present application.

It is understood that when the first light extinction structure 122a is a protrusion or a groove, the first light extinction structure 122a may be a protrusion or a groove with various shapes according to the light extinction requirement, for example, the shape of the first light extinction structure 122a may be a sawtooth shape, a triangle shape, a square shape, a trapezoid shape, an arc shape, or the like, and the embodiment is not limited thereto.

The material of the pressure ring 12 provided in the embodiment of the present application may be metal, plastic, silica gel, or rubber. When the material of clamping ring 12 is the metal, clamping ring 12 can adopt machine tooling, when being compared with the material of clamping ring 12 for plastic, silica gel or rubber, clamping ring 12's processing cost is higher, but the plane degree and the depth of parallelism on clamping ring 12's surface are all better, for example, can make the depth of parallelism on clamping ring 12's surface be less than 0.005 mm. If the requirement on the parallelism of the surface of the pressure ring 12 is not high, for example, the parallelism of the surface (e.g., the first end surface 121) of the pressure ring 12 may be greater than 0.01mm, plastic, silica gel, or rubber may be considered as a material of the pressure ring 12, and the pressure ring 12 may be formed by using a mold.

Further, as shown in fig. 5, the pressing ring 12 further has an outer peripheral surface 124, the outer peripheral surface 124 is connected to the first end surface 121 and the second end surface 122, the outer peripheral surface 124 is provided with a groove 125, and a notch of the groove 125 is arranged opposite to the optical axis. It will be appreciated that the groove 125 in the pressure ring 12 may approximate a square groove, a trapezoidal groove, an arcuate groove, or the like.

In some embodiments, the pressure ring 12 is mirrored, as shown in FIG. 6Maximum outer diameter of one end (image side end of the pressing ring 12) outside the cylinder 10

Is less than or equal to the outer diameter of the image side end 101 of the lens barrel 10

That is to say that the first and second electrodes,

by controlling the maximum outer diameter of the end of the press ring 12 located outside the lens barrel 10

When the lens structure 100 is matched with other parts of the camera module (for example, a motor or a base), the interference between one end of the pressing ring 12 located outside the lens barrel 10 and other parts of the camera module can be avoided, so that the assembly of the camera module can be normally performed.

In some embodiments, referring to fig. 3 again, in a direction perpendicular to the optical axis (e.g., a direction indicated by an arrow x in fig. 3), a thickness h3 of an end of the pressing ring 12 located outside the lens barrel 10 is greater than or equal to 0.15mm, in other words, a thickness of an image-side end of the pressing ring 12 is greater than or equal to 0.15mm, that is, h3 ≧ 0.15mm, e.g., h3 ≧ 0.15mm, h3 ≧ 0.16mm, h3 ≧ 0.17mm, h3 ≧ 0.18mm, h3 ═ 0.19mm, h3 ═ 0.20mm, or h3 ═ 0.22 mm. Through controlling the thickness h3 of the one end that is located outside the lens cone 10 of clamping ring 12 in the scope that is greater than or equal to 0.15mm, can ensure that the first terminal surface 121 of clamping ring 12 has great area, avoid the one end that is located outside the lens cone 10 of clamping ring 12 to form the closed angle and produce deckle edge to guarantee that the shaping of clamping ring 12 is stable, make clamping ring 12 have higher dimensional accuracy and surface accuracy, thereby can improve lens structure 100's measurement stability. This is mainly considered that when the lens barrel 10 and the optical lens 11 of the lens structure 100 are off-axis or not, and when the object side surface and the image side surface 102 of the optical lens 11 of the lens structure 100 are off-center or not, the first end surface 121 of the press ring 12 is used as a reference surface, so that the dimensional accuracy and the surface accuracy of the press ring 12 are improved, and the measurement stability of the lens structure 100 can be improved.

As an alternative embodiment, as shown in fig. 3 and 4, the groove 125 and the inner wall surface of the lens barrel 10 enclose to form a glue containing space, and the glue containing space is used for containing a bonding medium M (for example, epoxy resin bonding glue or latex glue, etc.) to fix the pressing ring 12 to the lens barrel 10. The compression ring 12 is fixed on the lens barrel 10 in an adhesion mode, the installation mode is simple, compared with the traditional mechanical fastening (riveting, welding, screwing and other modes), the adhesion strength is high, the cost is low, the overall mass of the installed lens barrel 10 structure is light, and the light-weight design of the lens structure 100 is facilitated.

As another alternative embodiment, as shown in fig. 7 to 9, the image side surface 102 of the image side end 101 of the lens barrel 10 is provided with a fixing portion 103, and the fixing portion 103 is bent toward the groove 125 to abut against an inner wall surface of the groove 125, so as to fix the pressing ring 12 to the lens barrel 10. The fixing connection mode adopted by this embodiment needs to heat and soften the fixing portion 103, so that the fixing portion 103 can be bent, and the fixing portion 103 can keep this bent state after cooling, so as to fix the pressing ring 12 on the lens barrel 10, and in this process, dispensing is not needed, so that the condition that the bonding medium enters the optical lens 11 can be avoided, and the risk of contaminating the optical lens 11 is reduced.

In this embodiment, the fixing portion 103 may be a ring-shaped structure disposed around the optical axis, the fixing portion 103 is bent toward the recess 125, and the inner ring surface 1031 of the fixing portion 103 abuts against the inner wall surface 1250 of the recess 125. By limiting the inner ring surface of the fixing portion to abut against the inner wall surface of the groove, that is, when the fixing portion 103 is bent toward the groove 125, the inner ring surface 1031 of the fixing portion 103 can be adapted to and attached to the inner wall surface 1250 of the groove 125, so that the inner ring surface 1031 of the fixing portion 103 and the inner wall surface 1250 of the groove 125 can be attached tightly, and the connection stability between the pressing ring 12 and the lens barrel 10 can be improved.

Further, the inner ring surface 1031 of the fixing portion 103 may be disposed parallel to the optical axis, the inner wall surface 1250 of the groove 125 may be disposed perpendicular to the optical axis, and when the fixing portion 103 is bent toward the groove 125, the inner ring surface 1031 of the fixing portion 103 and the inner wall surface 1250 of the groove 125 may be more easily attached to each other, so as to further improve the connection stability between the pressing ring 12 and the lens barrel 10.

Here, the inner annular surface 1031 of the fixing portion 103 may be disposed parallel to the optical axis, which means that the inner annular surface 1031 of the fixing portion 103 is completely parallel to the optical axis, or an angle formed between the inner annular surface 1031 of the fixing portion 103 and the optical axis is within an allowable range (e.g., less than 5 °). The inner wall surface 1250 of the groove 125 may be disposed perpendicularly to the optical axis, meaning that an angle formed between the inner wall surface 1250 of the groove 125 and the optical axis is 90 ° (completely perpendicular), or an angle formed between the inner wall surface 1250 of the groove 125 and the optical axis is in a range of (85 °, 90 °).

Illustratively, the fixing portion 103 may be a ring of closed ring disposed around the optical axis, or alternatively, the fixing portion 103 may be an open ring structure disposed around the optical axis. When the fixing part 103 is an open-loop structure disposed around the optical axis, the fixing part 103 may be one or more; when the fixing portions 103 are plural, the fixing portions 103 are disposed at intervals, and the fixing portions 103 may be uniformly arranged with respect to the optical axis, or the fixing portions 103 may also be non-uniformly arranged with respect to the optical axis. The present application does not limit the specific shape, number, and the like of the fixing portion, as long as the fixing portion 103 can be bent toward the groove 125 to abut against the inner wall surface of the groove 125, so as to fix the pressing ring 12 to the lens barrel 10.

The specific structure of the pressing ring 12 will be described below with reference to fig. 11 to 13, taking as an example the shape of the groove 125 when the pressing ring 12 is fixed to the lens barrel 10 by adhesion. Specifically, groove 125 of pressure ring 12 may generally include a bottom surface 1251 and an inner sidewall surface 1252 (i.e., inner wall surface 1250 described above) connected to bottom surface 1251, where bottom surface 1251 of groove 125 is disposed away from inner circumferential surface 123 of pressure ring 12 (i.e., bottom surface 1251 is disposed away from the optical axis).

For convenience of description, in fig. 13, it is set that a direction perpendicular to the bottom surface 1251 of the groove 125 and away from the optical axis is a first direction, for example, a direction indicated by an arrow z in fig. 13, and a direction parallel to the bottom surface 1251 of the groove 125 is a second direction, that is, a direction perpendicular to the first direction is a second direction, for example, a direction indicated by an arrow y in fig. 13; it should be understood that the above-described orientations are merely examples for convenience of description and understanding, and do not limit the scope of the present embodiments.

Illustratively, the width of the groove 125 in the second direction gradually increases along the first direction, so that an included angle formed between the inner side wall surface 1252 of the groove 125 and the bottom surface 1251 of the groove 125 is a right angle or an obtuse angle, a sharp angle is prevented from being formed at a connection position of the bottom surface 1251 and the inner side wall surface 1252, and a sharp angle is prevented from being formed at a connection position of the inner side wall surface 1252 and the outer peripheral surface 124 of the pressure ring 12, thereby preventing a situation that a stress at a connection position of the bottom surface 1251 of the groove 125 and the inner side wall surface 1252 of the groove 125 is excessively concentrated to cause a crack or even a fracture, preventing a situation that a stress at a connection position of the inner side wall surface 1252 of the groove 125 and the outer peripheral surface 124 of the pressure ring 12 is excessively concentrated to cause a crack or even a fracture, and prolonging the service life of the pressure ring 12; in addition, when the pressing ring 12 is formed by utilizing die machining, the die is convenient to draw, and the machining difficulty of the pressing ring 12 is reduced.

Further, the outer peripheral surface 124 of the pressing ring 12 has an abutting surface 126 for abutting against the inner wall of the lens barrel 10, the abutting surface 126 is connected to the second end surface 122 and the inner side wall surface 1252 of the groove 125, respectively, and a joint of the abutting surface 126 and the second end surface 122 has a second chamfer R2 (for example, a fillet or a chamfer), so that a sharp corner is prevented from being formed at the joint of the abutting surface 126 and the second end surface 122. Moreover, an included angle formed between the abutting surface 126 and the inner side wall 1252 of the groove 125 is a right angle or an obtuse angle, so that a sharp angle is prevented from being formed at the joint of the abutting surface 126 and the outer peripheral surface 124 of the pressure ring 12, and therefore the stress distribution of the pressure ring 12 is relatively uniform.

In the embodiment shown in fig. 12 and 13, the inner wall surface 1252 of the groove 125 connected to the abutment surface 126 may include a first portion 1252a and a second portion 1252b connected to each other, the first portion 1252a may be connected to the bottom surface 1251 of the groove 125, an angle between the first portion 1252a and the bottom surface 1251 of the groove 125 may be an obtuse angle, the second portion 1252b may be connected to the abutment surface 126, and an angle between the second portion 1252b and the abutment surface 126 may be a right angle, so that a contact area between the pressure ring 12 and the lens barrel 10 may be increased while avoiding a sharp angle at a connection point between the second portion 1252b and the inner wall surface 1252, and connection stability between the pressure ring 12 and the lens barrel 10 may be improved.

Exemplarily, in the optical axis direction O, a distance h4 between the second end surface 122 and the inner sidewall surface 1252 of the groove 125 is greater than or equal to 0.13mm, that is, in the embodiment shown in fig. 13, a distance h4 between the second end surface 122 and the second portion 1252b is greater than or equal to 0.13mm, that is, h4 ≧ 0.13mm, for example, h4 ≧ 0.13mm, h4 ═ 0.15mm, h4 ═ 0.17mm, h4 ═ 0.19mm, h4 ═ 0.20mm, h4 ═ 0.22mm, or h4 ═ 0.24 mm. Like this, can guarantee that clamping ring 12 and lens cone 10 complex size are great for the area of contact of clamping ring 12 and lens cone 10 is great, improves the stability of being connected between clamping ring 12 and the lens cone 10, and the clamping ring 12 of being convenient for is spacing and fix in lens cone 10.

In some embodiments, as shown in fig. 13, the bottom surface 1251 is disposed parallel to the inner circumferential surface 123 of the pressure ring 12, and the distance h5 between the bottom surface 1251 and the inner circumferential surface 123 of the pressure ring 12 is greater than or equal to 0.20mm in a direction perpendicular to the bottom surface 1251 (e.g., the aforementioned first direction, such as the direction indicated by the arrow z in fig. 13), that is, h5 ≧ 0.20mm, e.g., h5 ≧ 0.20mm, h5 ≧ 0.22mm, h5 ≧ 0.24mm, h5 ≧ 0.25mm, h5 ≧ 0.27mm, h5 ═ 0.29mm, or h5 ═ 0.30 mm. It can be understood that the thickness of the thinnest part of the pressure ring 12 is the distance between the bottom surface 1251 and the inner peripheral surface 123, therefore, the distance h5 between the bottom surface 1251 and the inner peripheral surface 123 is controlled within the range of more than or equal to 0.20mm, the thickness of the pressure ring 12 can be prevented from being too thin, so as to ensure that the whole pressure ring 12 has enough strength, which is beneficial to making the thickness of the pressure ring 12 at each place consistent, thereby being beneficial to improving the service life of the pressure ring 12, moreover, when the pressure ring 12 is assembled, the pressure ring 12 is not easy to deform, thereby being convenient for the processing and forming of the pressure ring 12.

Further, as shown in fig. 14, the bottom surface 1251 of the groove 125 may be provided with a plurality of ribs 1251a, and the plurality of ribs 1251a may be provided at intervals. By providing the rib 1251a on the bottom surface 1251a of the groove 125 to enhance the structural strength of the pressure ring 12 by the rib 1251a, the distance h5 between the bottom surface 1251 and the inner peripheral surface 123 can be reduced as appropriate, and the weight of the pressure ring 12 can be reduced. Meanwhile, in the embodiment, if the pressing ring 12 is connected to the lens barrel 10 in a gluing manner, the gluing amount can be increased, and the connection stability of the pressing ring 12 on the lens barrel 10 is improved.

Illustratively, as shown in fig. 14, the ribs 1251a may be disposed around an optical axis with the bottom surface 1251; alternatively, the ribs 1251a may be disposed on the bottom surface 1251 to extend in a direction parallel to the bottom surface 1251, which is not limited in this embodiment.

In some embodiments, in the lens structure 100 provided in the embodiment of the present application, in the optical axis direction O, the pressing ring 12 extends from the inside of the lens barrel 10 to the outside of the lens barrel 10, and the optical lens 11 is at least partially located in the pressing ring 12, so that light is reflected to the imaging surface of the lens structure 100 through the inner peripheral surface 123 of the pressing ring 12, which causes generation of stray light, and affects the imaging quality of the lens structure 100, therefore, in order to avoid generation of stray light, as shown in fig. 15 to 17, the inner peripheral surface 123 of the pressing ring 12 is provided with a second extinction structure 127. For example, the second light extinction structure 127 may be a protrusion or a groove disposed on the inner circumferential surface 123, or the second light extinction structure 127 may be a protrusion formed by performing a surface roughening process on the inner circumferential surface 123 of the pressure ring 12, and so on. In other words, by providing the second light extinction structure 127 on the inner circumferential surface 123 of the pressing ring 12, the inner circumferential surface 123 of the pressing ring 12 is made rougher, and when light is incident on the roughened inner circumferential surface 123, stray light interfering with the imaging of the lens structure 100 is not easily reflected by the roughened surface, that is, by increasing the roughness of the inner circumferential surface 123 of the pressing ring 12, the reflected stray light on the inner circumferential surface 123 of the pressing ring 12 can be weakened, so as to improve the imaging quality of the lens structure 100 provided by the present application.

It is understood that when the second light extinction structure 127 is a protrusion or a groove, the second light extinction structure 127 can be a protrusion or a groove with various shapes according to the light extinction requirement, for example, the shape of the second light extinction structure 127 can be a zigzag shape, a triangular shape, a square shape, a trapezoid shape, an arc shape, or the like, which is not limited in this embodiment.

In some embodiments, the second light extinction structure 127 may be multiple, so as to ensure that the second light extinction structure 127 can be disposed at each position of the inner circumferential surface 123 of the pressure ring 12, thereby further weakening the reflected stray light of the inner circumferential surface 123 of the pressure ring 12. As an alternative embodiment, as shown in fig. 15 to 17, a plurality of second light extinction structures 127 may be sequentially disposed around the optical axis along the optical axis direction O to attenuate the stray light reflected from the inner circumferential surface 123 of the pressure ring 12. In the embodiment shown in fig. 17, the second light extinction structure 127 may include a plurality of zigzag grooves arranged at intervals, and the width d1 of the side wall of each zigzag groove satisfies the following relation: 0.03mm ≦ d1 ≦ 0.06mm, for example, d1 ≦ 0.03mm, d1 ≦ 0.035mm, d2 ≦ 0.04mm, d1 ≦ 0.045mm, d1 ≦ 0.05mm, d1 ≦ 0.055mm, or d1 ≦ 0.06 mm. It can be understood that if the width d1 of the side wall of the sawtooth-shaped step is larger, the thinner the thickness of the pressing ring 12 in the direction perpendicular to the optical axis O is, the weaker the strength thereof is, and therefore, in the above-listed numerical range, the structural strength of the pressing ring 12 can be ensured, and the second light extinction structure 127 can effectively perform light extinction to improve the imaging quality of the lens structure 100.

As another alternative, as shown in fig. 18 to 20, a plurality of the second light extinction structures 127 may be disposed radially around the optical axis to attenuate the stray light reflected from the inner circumferential surface 123 of the pressure ring 12. In the embodiment shown in fig. 19 and 20, the second light extinction structure 127 may include a plurality of arc-shaped grooves arranged at intervals, and the depth d2 of each arc-shaped groove in the direction perpendicular to the optical axis satisfies the following relation: 0.03mm ≦ d2 ≦ 0.06mm, for example, d2 ≦ 0.03mm, d2 ≦ 0.035mm, d2 ≦ 0.04mm, d2 ≦ 0.045mm, d2 ≦ 0.05mm, d2 ≦ 0.055mm, or d2 ≦ 0.06 mm. It can be known that if the depth d2 of the arc-shaped groove is deeper, the thinner the thickness of the pressing ring 12 in the direction perpendicular to the optical axis O is, the weaker the strength thereof is, and therefore, in the above-listed numerical range, the structural strength of the pressing ring 12 can be ensured while the second light extinction structure 127 can effectively perform light extinction to improve the imaging quality of the lens structure 100.

Further, the distance between two adjacent arc-shaped grooves is equal. Thus, the second light extinction structures 127 can be regularly arranged on the inner peripheral surface 123 of the pressure ring 12, and compared with other more complex arrangement structures, the arrangement structure is simpler and is convenient to produce.

Referring to fig. 21, an embodiment of the invention further discloses a camera module, where the camera module 200 has the lens structure 100 as described in the above embodiment, so that the camera module 200 can receive an optical signal of a subject. In the embodiment shown in fig. 21, the camera module 200 may include an image sensor 201 and the lens structure 100, and the lens structure 100 may be configured to receive an optical signal of a subject and project the optical signal to the image sensor 201. It can be understood that the camera module 200 having the lens structure 100 described in the above embodiment also has all the technical effects of the lens structure 100 described in the above embodiment. That is, the camera module 200 with the lens structure 100 can ensure the molding of the lens barrel 10, and simultaneously avoid the risk of scratching and polluting the optical lens 11 by pressing the ring 12 (the lens barrel 10) at the protruding part of the optical lens 11.

Referring to fig. 22, an embodiment of the present invention further discloses an electronic device, wherein the electronic device 300 has the camera module 200 according to the above embodiment, so that the electronic device 300 has a photographing function. In the embodiment shown in fig. 22, the electronic device 300 may include a device housing 301 and the camera module 200, and the camera module 200 is disposed on the device housing 301 to obtain image information. The electronic device 300 may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a smart watch, a monitor, and the like. It can be understood that the electronic device 300 having the camera module 200 according to the above embodiment also has all the technical effects of the lens structure 100 according to the above embodiment. That is, the electronic device 300 having the camera module 200 can ensure the molding of the lens barrel 10, and simultaneously avoid the risk of scratching and polluting the optical lens 11 by pressing the ring 12 (the lens barrel 10) at the protruding part of the optical lens 11.

The lens structure, the camera module and the electronic device disclosed by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the lens structure, the camera module and the electronic device and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A lens structure, comprising:

a lens barrel;

the optical lens is arranged in the lens barrel; and

the compression ring is arranged at the image side end of the lens barrel and extends out of the lens barrel from the inside of the lens barrel in the optical axis direction, the compression ring is provided with a first end face, a second end face and an inner peripheral face, the first end face is positioned outside the lens barrel, in addition, the distance from the first end face to the image side face of the lens barrel is larger than the distance from the farthest point of the optical lens from the object side face of the lens barrel to the image side face of the lens barrel in the optical axis direction, the second end face is positioned in the lens barrel and is arranged opposite to the first end face, the second end face is used for being abutted against the optical lens, and the inner peripheral face is respectively connected with the first end face and the second end face;

2. A lens structure according to claim 1, characterized in that the surface of the first chamfer is provided with a first light-extinction structure.

3. The lens structure according to claim 1, wherein a thickness of an end of the pressing ring located outside the lens barrel in a direction perpendicular to the optical axis is greater than or equal to 0.15 mm.

4. The lens structure according to claim 1, wherein a maximum outer diameter of an end of the pressing ring located outside the lens barrel is smaller than or equal to an outer diameter of an image side end of the lens barrel.

5. The lens structure according to any one of claims 1 to 4, wherein a groove is provided on an outer peripheral surface of the pressing ring;

the groove and the inner wall surface of the lens cone enclose to form a glue containing space, and the glue containing space is used for containing a bonding medium to fix the pressing ring on the lens cone; or

The image side surface of the lens cone is provided with a fixing part, and the fixing part is bent towards the groove to abut against the inner wall surface of the groove so as to fix the pressing ring on the lens cone.

6. The lens structure according to claim 5, wherein the fixing portion is disposed on an image side surface of the lens barrel, the fixing portion is an annular structure disposed around an optical axis, the fixing portion is bent toward the groove, and an inner annular surface of the fixing portion abuts against an inner wall surface of the groove.

7. The lens structure according to claim 5, wherein the groove includes a bottom surface disposed away from the inner peripheral surface, a direction perpendicular to the bottom surface and away from the optical axis is a first direction, and a width of the groove in a direction parallel to the bottom surface gradually increases along the first direction.

8. The lens structure according to claim 5, wherein the groove includes a bottom surface disposed away from the inner peripheral surface, the bottom surface being disposed in parallel with the inner peripheral surface, a distance between the bottom surface and the inner peripheral surface in a direction perpendicular to the bottom surface being greater than or equal to 0.20 mm.

9. The lens structure according to claim 5, wherein the groove includes a bottom surface disposed away from the inner peripheral surface, the bottom surface being provided with a rib.

10. The lens structure according to claim 5, wherein an abutting surface for abutting against an inner wall of the lens barrel is provided on an outer peripheral surface of the pressing ring, the abutting surfaces are respectively connected to the second end surface and an inner side wall surface of the groove, and a distance between the second end surface and the inner side wall surface of the groove in the optical axis direction is greater than or equal to 0.13 mm.

11. A lens structure according to any one of claims 1 to 4, characterized in that the inner peripheral surface is provided with a second light extinction structure.

12. The lens structure according to claim 11, wherein the second light extinction structure is provided in plurality, and the plurality of second light extinction structures are sequentially arranged around the optical axis along the optical axis direction, or the plurality of second light extinction structures are radially arranged with the optical axis as a center.

13. A camera module, characterized in that the camera module has a lens structure according to any one of claims 1 to 12.

14. An electronic apparatus characterized by having the camera module according to claim 13.