CN214474172U

CN214474172U - Lens, lens module and electronic equipment

Info

Publication number: CN214474172U
Application number: CN202120663728.8U
Authority: CN
Inventors: 李二飞; 王丽青; 谭怡翔
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-10-22
Anticipated expiration: 2031-03-31

Abstract

The application relates to the technical field of imaging devices, and particularly discloses a lens, a lens module and an electronic device. The lens comprises a lens barrel, a lens group and a filter. The lens cone is arranged around the optical axis and is provided with a through hole; the lens group is arranged in the lens barrel, the first lens of the lens group is provided with an image side surface which is close to the imaging surface, the image side surface is provided with a positioning groove, and the area of the image side surface, which is positioned outside the positioning groove, forms a connecting surface; the optical filter part is arranged in the positioning groove, and the optical filter protrudes out of the inner side wall of the positioning groove in the direction of the optical axis; the connecting surface, the outer side wall surface of the optical filter and the inner wall surface of the lens cone are surrounded to form a dispensing groove, and the first lens, the optical filter and the lens cone are fixedly connected into a whole through glue arranged in the dispensing groove. The utility model discloses a thrust and the stability of camera lens are higher, can prevent that glue from improving the interior anti-parasitic light of first lens towards the overflow of the effective footpath department of first lens, and the production yields is high, and the formation of image quality is good.

Description

Lens, lens module and electronic equipment

Technical Field

The present application relates to the field of imaging devices, and in particular, to a lens, a lens module, and an electronic apparatus.

Background

The lens module is formed by stacking or buckling a lens cone, a lens, a spacing ring and a shading sheet together. When the lens module is actually assembled, the infrared filters (I R filters) can be attached to the inside and outside of the lens barrel, and then fixed by dispensing. When the infrared filter is disposed inside the lens barrel, the lens placed in the lens barrel at last needs to be dispensed, baked and fixed, and then the infrared filter is placed in the lens barrel for secondary dispensing, baked and fixed. Therefore, the whole assembly process needs to be baked twice, the process is very complicated, and the overall yield of lens production is invisibly reduced.

In addition, as the lens module is being miniaturized, the lens module becomes smaller and smaller, and the corresponding dispensing space becomes smaller, so that abnormal dispensing such as glue overflow and dislocation often occurs. The abnormal dispensing not only affects the thrust and stability of the lens module, but also affects the stray light performance of the lens module, and further affects the production yield and the imaging quality of the lens module. Therefore, a lens structure is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The application discloses camera lens, camera lens module and electronic equipment to solve the camera module group point among the prior art and glue the problem that influences the thrust and the stability of camera lens unusually easily. In order to achieve the above object, an embodiment of the present application discloses a lens barrel, including:

the lens cone is arranged around the optical axis and is provided with a through hole;

the lens group enters from one side of the through hole and is installed in the lens barrel, the lens group comprises a first lens which is arranged close to an imaging surface of the lens, the first lens is provided with an image side surface which is arranged close to the imaging surface, the image side surface is provided with a positioning groove, and a connecting surface is formed in an area, located outside the positioning groove, of the image side surface; and

the optical filter is partially arranged in the positioning groove and protrudes out of the inner side wall of the positioning groove in the direction of the optical axis;

the first lens, the optical filter and the lens cone are fixedly connected into a whole through glue arranged in the glue dispensing groove.

Because the image side of the first lens in the application is provided with the positioning groove, and the part of the optical filter is arranged in the positioning groove, the thickness of the lens in the optical axis direction can be reduced, the miniaturization design of the lens is convenient to realize, the overall dimension of the lens barrel can be reduced to the maximum extent, the mechanical back focus of the lens is enlarged, and then a sufficient focusing space can be reserved for the lens. Meanwhile, compared with the conventional mode that the optical filter is directly attached to the lens and is bonded in a secondary dispensing mode, the optical filter is arranged in the positioning groove, the size of the dispensing groove can be increased, more glue can be accommodated, the contact area between the glue and the optical filter, the first lens and the lens barrel is increased, the connection among the first lens, the optical filter and the lens barrel is more stable, and the thrust and the stability of the lens can be increased. In addition, after the size of the glue dispensing groove is set to be larger, more glue can be contained in the glue dispensing groove, and then the overflow of the glue towards the effective diameter of the first lens can be prevented, and the yield of the lens in production is ensured.

Further, after the size of the glue dispensing groove is set to be large, more glue can be set in the glue dispensing groove, when stray light is reflected to the glue position in the first lens, the stray light can be reflected again by the glue, the glue surface is rough, the reflection effect is better, the stray light is more difficult to irradiate into the effective imaging area of the imaging surface, namely, the structure of the lens in the application can improve the inner stray light of the first lens, and the imaging quality of the lens can be improved.

As an optional implementation manner, in an embodiment of the present application, a depth of the dispensing groove in the optical axis direction of the lens is shallower on a side close to the positioning groove, and is deeper on a side far from the positioning groove. So set up, after some glue in some glue groove, the thickness that glue is close to the one side of the inside wall face of lens cone is thicker, and is glued thinly in the thickness that is close to light filter one side, and glue can contact well with the outside wall face of light filter, the internal face of lens cone, can further improve the joint strength of light filter and the thrust of camera lens.

As an optional implementation manner, in the embodiment of the application, the maximum depth of the dispensing groove in the optical axis direction is D12, and the minimum depth of the dispensing groove in the optical axis direction is D11, wherein D12-D11 are more than or equal to 0.1 mm. Because the depth of the side, close to the optical axis, of the glue dispensing groove is smaller than the depth of the side, far away from the optical axis, of the glue dispensing groove, namely the maximum depth D12 of the glue dispensing groove is located on the side, close to the inner wall surface of the lens barrel, of the glue dispensing groove, and the minimum depth D11 of the glue dispensing groove is located on the side, close to the optical axis, of the glue dispensing groove, at this moment, the depth difference between the side, close to the inner wall surface of the lens barrel, of the glue dispensing groove and the side, close to the optical axis, of the glue dispensing groove can be increased by enabling D12-D11 to be larger than or equal to 0.1mm, glue can flow to the side, close to the inner wall surface of the lens barrel, of the glue dispensing groove (the deeper side, close to the depth of the inner wall of the lens barrel) as far as possible, glue overflow phenomenon caused by flowing to the side, and the production yield of the lens can be further improved.

As an alternative, in the embodiments of the present application, the side walls of the positioning groove are inclined toward the outer edge of the first lens. So set up, can be so that positioning groove's tank bottom is narrow, and the notch is wide, is convenient for more install the light filter in positioning groove. Meanwhile, after the optical filter is placed in the positioning groove, a certain gap is formed between the outer edge of the optical filter and the side wall of the positioning groove, and glue can enter the gap during glue dispensing, so that the contact area between the glue and the first lens and the optical filter is increased, and the connection strength and the stability of the optical filter, the first lens and the lens barrel can be further improved.

As an alternative, in the embodiment of the present application, the side wall of the positioning groove has an angle α with the optical axis, wherein α < 3 ° < α < 10 °. The included angle between the side wall of the positioning groove and the optical axis is more than 3 degrees and less than 10 degrees, which is not only convenient for installing the optical filter in the positioning groove, but also convenient for glue to overflow into the gap between the positioning groove and the optical filter.

As an optional implementation manner, in the embodiment of the present application, the optical filter is a square optical filter or a circular optical filter, and the structure is simple, so that the optical filter is convenient to select according to actual design and use requirements.

As an optional implementation manner, in an embodiment of the present application, the optical filter is a square optical filter, and four corners of the square optical filter are provided with chamfers. The chamfer angles are arranged at the four corners of the square optical filter, after the optical filter is installed in the positioning groove, the size of the glue dispensing groove can be further increased, more glue can be contained, the contact area between the glue and the optical filter, the first lens and the lens barrel can be increased, the connection among the first lens, the optical filter and the lens barrel is more stable, the thrust and the stability of the lens can be increased, and the internal reflection stray light of the first lens is improved. As an optional implementation manner, in an embodiment of the present application, an annular bearing surface is disposed on an outer periphery of a bottom of the positioning groove, the annular bearing surface surrounds an outer periphery of an effective diameter of the lens, and the optical filter abuts against the annular bearing surface; the width of the optical filter on the diagonal line is H6, the outer diameter of the first lens is H7, and H7 is not less than H6. Through making the light filter butt in this application on the annular that is located the camera lens effective footpath periphery holds the face of leaning on, when gluing in the groove point towards, the periphery lateral wall of light filter can be with the glue separation, prevents that glue from overflowing to the effective footpath of camera lens regional in, can guarantee the imaging quality of camera lens. Meanwhile, the optical filter can be mounted in the positioning groove by making H6 be not more than H7, the size of the lens barrel in the optical axis direction can be reduced, the miniaturization design of the lens is convenient to realize, the mechanical back focus of the lens is enlarged, and then a focusing space can be reserved for the lens.

As an optional implementation manner, in an embodiment of the present application, a first gap is formed between the outer peripheral wall surface of the first lens and the inner side wall surface of the lens barrel, and the first gap is communicated with the dispensing slot, so that during dispensing, glue can enter the first gap from the dispensing slot, and a contact area between the glue and the first lens and the lens barrel can be further increased, so as to further improve structural strength and thrust of the lens barrel.

On the other hand, the embodiment of the application also discloses a lens module, the lens module comprises the lens and the photosensitive chip, and the photosensitive chip is arranged on the image side of the lens.

In a third aspect, an embodiment of the present application further discloses an electronic device, where the electronic device includes the lens described above.

Compared with the prior art, the lens module and the electronic equipment at least have the following technical effects:

in the application, the positioning groove is arranged on the image side surface of the first lens, and the part of the optical filter is arranged in the positioning groove, so that the thickness of the optical axis direction of the lens can be reduced, the miniaturization design of the lens is convenient to realize, the overall dimension of the lens cone can be reduced to the maximum extent, the mechanical back focus of the lens is enlarged, and a sufficient focusing space can be reserved for the lens. Meanwhile, compared with the conventional mode that the optical filter is directly attached to the lens and is bonded in a secondary dispensing mode, the optical filter is arranged in the positioning groove, the size of the dispensing groove can be increased, more glue can be contained, the contact area of the glue, the optical filter, the first lens and the lens barrel is increased, the connection among the first lens, the optical filter and the lens barrel is more stable, and the thrust and the stability of the lens can be increased. In addition, after the size of the glue dispensing groove is set to be larger, more glue can be contained in the glue dispensing groove, and then the overflow of the glue towards the effective diameter of the first lens can be prevented, and the yield of the lens in production is ensured.

Further, when the parasitic light is reflected to the glue, the parasitic light can be reflected again by the glue when the parasitic light is reflected to the glue, the reflection effect of the glue is better, and the parasitic light is more difficult to irradiate into the effective imaging area of the imaging surface.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a front view of a lens barrel disclosed in an embodiment of the present application;

FIG. 2 is a rear view of a lens barrel disclosed in an embodiment of the present application;

fig. 3 is a cross-sectional view of a lens barrel disclosed in an embodiment of the present application;

FIG. 4 is an enlarged view of the area M in FIG. 3;

fig. 5 is a front view of a lens barrel disclosed in the second embodiment of the present application;

fig. 6 is a rear view of a lens barrel disclosed in the second embodiment of the present application;

fig. 7 is a sectional view a-a of a lens barrel disclosed in the second embodiment of the present application;

FIG. 8 is an enlarged view of region P of FIG. 7;

fig. 9 is a B-B sectional view of a lens barrel disclosed in the second embodiment of the present application;

FIG. 10 is an enlarged view of the area N in FIG. 9;

fig. 11 is a half sectional view of a lens barrel disclosed in the second embodiment of the present application;

fig. 12 is a front view of a filter disclosed in the second embodiment of the present application;

fig. 13 is a front view of an electronic device disclosed in the third embodiment of the present application.

Icon: 100. a lens; 10. a lens barrel; 11. a through hole; 20. a lens group; 21. a first lens; 211. an image side; 212. a positioning groove; 212a, sidewalls; 213. a connecting surface; 22. a second lens; 23. a third lens; 30. an optical filter; 31. chamfering; 40. dispensing a glue groove; 50. an imaging plane; 60. a shading sheet; 70. a first gap; 300. an electronic device; 301. a housing.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used 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 meaning of these terms in this application will be understood by those of ordinary skill 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 meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the particular nature and configuration of which may be the same or different, and not intended to indicate or imply the relative importance or importance of the indicated device, element, or component.

The following detailed description is made with reference to the accompanying drawings.

Example one

Referring to fig. 1 to 4, according to an embodiment of the present application, there is provided a lens barrel 100, where the lens barrel 100 includes a lens barrel 10, a lens group 20, and a filter 30.

The lens barrel 10 is arranged around an optical axis, and a through hole 11 is formed in the lens barrel 10; the lens group 20 enters from one side of the through hole 11 and is installed in the lens barrel 10, the lens group 20 has a first lens 21 disposed close to the imaging surface 50, the first lens 21 has an image side surface 211 disposed close to the imaging surface 50, the image side surface 211 is provided with a positioning groove 212, and a region of the image side surface 211 outside the positioning groove 212 forms a connecting surface 213; the filter 30 is partially disposed in the positioning groove 212, and the filter 30 protrudes from the inner sidewall of the positioning groove 212 in the optical axis direction, i.e. the filter 30 is higher than the sidewall of the positioning groove 212. The connection surface 213, the outer wall surface of the optical filter 30, and the inner wall surface of the lens barrel 10 are surrounded to form a dispensing groove 40, and the first lens 21, the optical filter 30, and the lens barrel 10 are fixedly connected into a whole by glue disposed in the dispensing groove 40.

It is understood that the filter 30 disposed in the positioning groove 212 means: the filter 30 is partially immersed in the positioning groove 212, and fig. 3 and 4 show a case where the filter 30 is partially immersed in the positioning groove 212, and at this time, a side of the filter 30 close to the imaging plane 50 protrudes from the connection plane 213 of the first lens 21.

Since the image side 211 of the first lens 21 in this embodiment has the positioning groove 212, and the filter 30 is partially installed in the positioning groove 212, the thickness of the lens 100 in the optical axis direction can be reduced, the lens can be miniaturized, the external dimension of the lens barrel 10 can be reduced to the maximum extent, the mechanical back focus of the lens 100 can be enlarged, and a sufficient focusing space can be left for the lens 100. Meanwhile, compared with the conventional method of directly attaching the optical filter 30 to the lens and adhering the optical filter 30 by twice dispensing, in the present embodiment, after the optical filter 30 is disposed in the positioning groove 212, the size of the dispensing groove 40 can be set larger, so as to accommodate more glue, thereby increasing the contact area between the glue and the optical filter 30, the first lens 21, and the lens barrel 10, and further stabilizing the connection among the first lens 21, the optical filter 30, and the lens barrel 10, so as to increase the thrust and stability of the lens 100. In addition, after the size of the glue dispensing groove 40 is set to be larger, more glue can be accommodated in the glue dispensing groove 40, so that the glue can be prevented from overflowing towards the effective diameter of the first lens 21, and the production yield of the lens 100 is ensured.

Further, after the size of the dispensing slot 40 is set to be large, more glue can be set in the dispensing slot 40, when the stray light is reflected to the glue position in the first lens 21, the stray light can be reflected again by the glue when the stray light is reflected to the glue position, the surface of the glue is rough, the reflection effect is better, and the stray light is more difficult to irradiate into the effective imaging area of the imaging surface 50, that is, the structure of the lens 100 in the embodiment can improve the internal reflection stray light of the first lens 21, and can improve the imaging quality of the lens 100.

Specifically, the lens barrel 10 in the present embodiment is provided in a cylindrical structure, which may be, for example, a cylindrical structure, a prismatic cylindrical structure, or other irregular cylindrical structure, and fig. 1 and 2 in the present embodiment show a case where the lens barrel 10 is provided in a cylindrical shape. In actual design, the through holes 11 may be circular holes, polygonal holes, or the like, and fig. 1 and 2 show the manner in which the through holes 11 are arranged in circular holes. The design and selection can be specifically carried out according to the actual use requirements, and the application is not particularly limited.

Further, the lens group 20 in the present embodiment includes at least one lens, such as one, two, three, or more than three lenses. In fig. 3, the lens group 20 includes three lenses, and for convenience of distinction, the above three lenses are respectively identified as a first lens 21, a second lens 22 and a third lens 23, wherein the first lens 21, the second lens 22 and the third lens 23 are sequentially disposed from the image side to the object side of the lens 100, that is, the first lens 21 is the lens closest to the imaging surface 50 of the lens 100.

Optionally, the first lens 21, the second lens 22 and the third lens 23 in this embodiment may be glass lenses, or may also be plastic lenses, and may be specifically configured according to actual use and design requirements, which is not specifically limited in this application.

The light shielding sheet 60 is arranged between two adjacent lenses, the light shielding sheet 60 is arranged in an annular shape, and the purpose of blocking stray light can be achieved through the effect of the light shielding sheet 60, so that the imaging quality of the lens 100 is improved conveniently.

Optionally, the light shielding film 60 is made of black plastic material by injection molding, so that the dimensional accuracy can be improved, and the effect of blocking stray light due to manufacturing errors is not reduced, or the imaging quality is not affected by blocking excessive effective imaging light. In other embodiments, the light shielding sheet 60 may be made of a black film through stamping.

Further, the optical filter 30 in the present application is a circular filter, and correspondingly, the positioning groove 212 is a circular groove, so that the circular filter is convenient to mount.

In some embodiments of the present application, the depth of the positioning groove 212 in the optical axis direction of the lens 100 is D, and the thickness of the optical filter 30 in the optical axis direction is D, where 2/3D ≦ D < D, for example, D ═ 2/3D, D ═ 5/6D, and so on. When the depth D of the positioning groove 212 in the optical axis direction of the lens 100 is less than 2/3D, the depth of the positioning groove 212 is shallow, and the filter 30 is not convenient to mount and position after the filter 30 is mounted in the positioning groove 212; when the depth D of the positioning groove 212 in the optical axis direction of the lens 100 is greater than or equal to D, after the optical filter 30 is installed in the positioning groove 212, the optical filter 30 is entirely immersed in the positioning groove 212, at this time, the optical filter 30 is not convenient to form the dispensing groove 40 with the connecting surface 213 and the inner side wall surface of the through hole 11, when the optical filter 30, the first lens 21 and the lens barrel 10 are glued and bonded by dispensing, glue easily flows in the direction close to the optical axis, the glue overflow phenomenon easily occurs in the production process, and the production yield of the lens 100 is reduced. That is, according to the present invention, D is greater than or equal to 2/3D and less than D, so that the optical filter 30 can be firmly adhered and fixed in the positioning groove 212, the optical filter 30 is prevented from being loosened, and the production yield of the lens 100 can be improved.

It is understood that the depth of the positioning groove 212 in the present embodiment refers to the distance D from the notch of the positioning groove 212 to the position of the groove bottom for carrying the optical filter 30.

Further, the depth of the dispensing slot 40 along the optical axis of the lens 100 is shallower at a side close to the positioning groove 212, and the depth at a side far from the positioning groove 212, that is, the depth of the dispensing slot 40 in the present application is deeper at a side close to the inner sidewall of the lens barrel 10, and is shallower at a side close to the optical filter 30. With such an arrangement, after the spot gluing is performed in the glue dispensing groove 40, the thickness of the glue on the side close to the inner side wall of the lens barrel 10 is thicker, and the thickness of the glue on the side close to the optical filter 30 is thinner, so that the glue can be well contacted with the outer side wall surface of the optical filter 30 and the inner wall surface of the lens barrel 10, and the connection strength of the optical filter 30 and the thrust of the lens 100 can be further improved.

Furthermore, the maximum depth of the dispensing slot 40 along the optical axis is D12, and the minimum depth of the dispensing slot 40 along the optical axis is D11, wherein D12-D11 are greater than or equal to 0.1mm, such as 0.1mm, 0.15mm, 0.18mm, 0.2mm, etc. Because the depth of the dispensing groove 40 close to the optical axis is smaller than the depth of the dispensing groove far from the optical axis, that is, the maximum depth D12 of the dispensing groove 40 is located at the side of the dispensing groove 40 close to the inner wall surface of the lens barrel 10, and the minimum depth D11 of the dispensing groove 40 is located at the side of the dispensing groove 40 close to the optical axis, at this time, by making D12-D11 be greater than or equal to 0.1mm, the depth difference between the side of the dispensing groove 40 close to the inner wall surface of the lens barrel 10 and the side close to the optical axis can be increased, so that the glue can flow to the side of the dispensing groove 40 close to the inner wall surface of the lens barrel 10 (the deeper side of the dispensing groove 40 in depth) as much as possible, the glue overflow phenomenon caused by flowing to the side close to the optical axis (the shallower side of the dispensing groove 40 in depth) can be prevented, and the production yield of the lens 100 can be further improved.

Referring again to fig. 4, the side walls of the positioning groove 212 are inclined toward the outer edge of the first lens 21, that is, the distance between the side wall 212a of the positioning groove 212 and the optical axis of the lens 100 is gradually increased in the groove bottom-to-groove opening direction of the positioning groove 212, so that the groove bottom of the positioning groove 212 is narrow and the groove opening is wide, and the filter 30 can be more easily mounted in the positioning groove 212. Meanwhile, after the optical filter 30 is placed in the positioning groove 212, a certain gap is formed between the outer edge of the optical filter 30 and the side wall of the positioning groove 212, and during dispensing, glue can enter the gap, so that the contact area between the glue and the first lens 21 and the optical filter 30 is increased, and the connection strength and stability of the optical filter 30, the first lens 21 and the lens barrel 10 can be further improved.

Optionally, the sidewall 212a of the positioning groove 212 in this embodiment forms an angle α with the optical axis, where α is < 3 ° < 10 °, for example, 4 °, 5 °, 6 °, 8 °, and the like. The included angle between the side wall 212a of the positioning groove 212 and the optical axis is more than 3 degrees and less than 10 degrees, which is convenient for installing the optical filter 30 in the positioning groove 212 and also convenient for glue to overflow into the gap between the positioning groove 212 and the optical filter 30.

Further, a first gap 70 is formed between the outer peripheral wall surface of the first lens 21 and the inner side wall surface of the lens barrel 10, the first gap 70 is communicated with the glue dispensing groove 40, when glue is dispensed, glue can enter the first gap 70 from the glue dispensing groove 40, the contact area between the glue and the first lens 21 and the lens barrel 10 can be further increased, and the structural strength and the thrust of the lens 100 can be further improved.

To sum up, in the present application, the positioning groove 212 is disposed on the image side 211 of the first lens 21, and the filter 30 is partially disposed in the positioning groove 212, so that the thickness of the lens 100 in the optical axis direction can be reduced, the lens can be miniaturized, the overall size of the lens barrel 10 can be reduced to the maximum extent, the mechanical back focus of the lens 100 can be enlarged, and a sufficient focusing space can be left for the lens 100. Meanwhile, compared with the conventional method of directly attaching the optical filter 30 to the lens and adhering the optical filter 30 by twice dispensing, in the present application, after the optical filter 30 is disposed in the positioning groove 212, the size of the dispensing groove 40 can be set larger, so as to accommodate more glue, thereby increasing the contact area between the glue and the optical filter 30, the first lens 21 and the lens barrel 10, and further stabilizing the connection among the first lens 21, the optical filter 30 and the lens barrel 10, so as to increase the thrust and stability of the lens 100. In addition, after the size of the glue dispensing groove 40 is set to be larger, more glue can be accommodated in the glue dispensing groove 40, so that the glue can be prevented from overflowing towards the effective diameter of the first lens 21, and the production yield of the lens 100 is ensured.

Further, when the stray light is internally reflected in the first lens 21, the internal reflection stray light is reflected to the glue, and can be reflected again by the glue, and the reflection effect of the glue is better, and the stray light is more difficult to irradiate into the effective imaging area of the imaging surface 50, that is, the structure of the lens 100 in the present application can improve the internal reflection stray light of the first lens 21, and can improve the imaging quality of the lens 100.

Example two

Referring to fig. 5 to 8, according to a second embodiment of the present application, a lens 100 is provided, the structure of the lens 100 in the second embodiment is substantially the same as that of the lens 100 in the first embodiment, except that the optical filter 30 in the present embodiment is a square optical filter, and in the present application, by setting the optical filter 30 as a square optical filter, the size of the dispensing groove 40 can be increased, and more glue can be accommodated, so that the contact area between the glue and the optical filter 30, the first lens 21, and the lens barrel 10 is increased, and the connection among the first lens 21, the optical filter 30, and the lens barrel 10 is more stable, so that the thrust and stability of the lens 100 can be increased, the internal reflection stray light of the first lens 21 is improved, and the imaging quality of the lens 100 is improved. In addition, after the size of the glue dispensing groove 40 is set to be larger, more glue can be accommodated in the glue dispensing groove 40, so that the glue can be prevented from overflowing towards the inner side of the first lens 21 close to the optical axis, and the production yield of the lens 100 is ensured.

Meanwhile, since the image side surface 211 of the first lens 21 in this embodiment has the positioning groove 212 and the filter 30 is partially installed in the positioning groove 212, the thickness of the lens barrel 100 in the optical axis direction can be reduced, the lens barrel can be miniaturized, the external dimension of the lens barrel 10 can be reduced to the maximum extent, the mechanical back focus of the lens barrel 100 can be enlarged, and a sufficient focusing space can be left for the lens barrel 100.

Referring to fig. 7 to 11, the four corners of the square filter in the present embodiment are provided with chamfers 31, where the chamfers 31 may be chamfered angles, rounded angles, or other special-shaped corners that can make the four corners of the filter 30 missing, and fig. 12 shows a case where the chamfers 31 are chamfered angles. By arranging the chamfers 31 at the four corners of the square optical filter, after the optical filter 30 is installed in the positioning groove 212, the size of the glue dispensing groove 40 can be further increased, and more glue can be accommodated, so that the contact area between the glue and the optical filter 30, the first lens 21 and the lens barrel 10 can be increased, the connection among the first lens 21, the optical filter 30 and the lens barrel 10 is more stable, the thrust and the stability of the lens 100 can be increased, and the internal reflection stray light of the first lens 21 is improved.

Further, in the embodiment, the outer periphery of the bottom of the positioning groove 212 is provided with an annular bearing surface, the annular bearing surface surrounds the outer periphery of the effective diameter of the lens 100, and the optical filter 30 abuts against the annular bearing surface during installation, in this application, by abutting the optical filter 30 against the annular bearing surface located at the outer periphery of the effective diameter of the lens 100, when dispensing is performed toward the dispensing groove 40, the peripheral sidewall of the optical filter 30 can block the glue, thereby preventing the glue from overflowing into the effective diameter area of the lens 100, and ensuring the imaging quality of the lens 100.

Further, the width of the filter 30 in the embodiment on the diagonal is H6, and the outer diameter of the first lens 21 is H7, wherein H6 is not more than H7. If H6 is larger than H7, the first lens 21 cannot be provided with the positioning groove 212 to which the filter 30 can be attached, and it is difficult to achieve a compact design of the lens 100. That is, in this embodiment, by setting H6 to H7, it is ensured that the optical filter 30 is mounted in the positioning groove 212, the size of the lens barrel 10 in the optical axis direction can be reduced, the lens can be miniaturized, the mechanical back focus of the lens 100 can be enlarged, and a sufficient focusing space can be left for the lens 100.

It is understood that the deformation of the optical filter 30 in the present embodiment is H4 and H5, respectively, wherein the width H6 on the diagonal line refers to the distance between the diagonal lines of the optical filter 30 after removing the chamfer 31, as shown in fig. 12.

EXAMPLE III

According to a third embodiment of the present application, a lens module is provided, which includes a photo sensor chip and the lens barrel of the first or second embodiment, wherein the photo sensor chip is disposed at an image side of the lens barrel. It can be understood that the lens module in this embodiment has the lens described above, and therefore the lens module in this embodiment has all the technical effects of the lens described above, and since the technical effects of the lens have been fully described above, the details are not described here.

Example four

Referring to fig. 13, according to a fourth embodiment of the present application, there is provided an electronic device 300, where the electronic device 300 may be, for example, a mobile phone, a tablet computer, a telephone watch, a security camera, a vehicle-mounted camera, and the like, and the electronic device includes a lens 100 and a housing 301, and the lens 100 is disposed in the housing 301. It can be understood that the electronic device 300 in this embodiment has the lens 100 described above, and therefore the electronic device 300 in this embodiment has all the technical effects of the lens 100 described above, and since the technical effects of the lens have been fully described above, the description thereof is omitted here.

The above detailed description is given to a lens, a lens module and an electronic device disclosed in the embodiments of the present application, and specific examples are applied in the description to explain the principle and the embodiments of the present application, and the description of the above embodiments is only used to help understand a lens, a lens module and an electronic device and their core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A lens barrel characterized by comprising:

2. The lens barrel according to claim 1, wherein a depth of the dispensing groove in the direction of the optical axis of the lens is shallower on a side close to the positioning groove and deeper on a side away from the positioning groove.

3. The lens barrel according to claim 2, wherein the maximum depth of the dispensing groove in the optical axis direction is D12, and the minimum depth of the dispensing groove in the optical axis direction is D11, wherein D12-D11 are 0.1mm or more.

4. The lens barrel according to claim 1, wherein an inner side of the positioning groove is inclined toward an outer edge of the first lens.

5. The lens barrel according to claim 1, wherein the side wall of the positioning groove has an angle α with the optical axis, wherein 3 ° < α < 10 °.

6. The lens barrel according to any one of claims 1 to 5, wherein the filter is a square filter or a circular filter.

7. The lens barrel according to any one of claims 1 to 5, wherein the filter is a square filter, and four corners of the square filter are each provided with a chamfer.

8. The lens barrel according to claim 7, wherein an annular bearing surface is arranged on the periphery of the bottom of the positioning groove, the annular bearing surface surrounds the periphery of the effective diameter of the lens barrel, and the optical filter abuts against the annular bearing surface; the width of the optical filter on the diagonal line is H6, the outer diameter of the first lens is H7, and H7 is not less than H6.

9. The lens barrel according to any one of claims 1 to 5, wherein a first gap is provided between the outer peripheral wall surface of the first lens and the inner side wall surface of the lens barrel, and the first gap communicates with the dispensing groove.

10. A lens module, comprising the lens barrel as claimed in any one of claims 1 to 9, and a photo sensor chip disposed on an image side of the lens barrel.

11. An electronic device, characterized in that the electronic device comprises the lens module of claim 10.