Camera module and electronic device

Abstract

A camera module and an electronic device, the camera module comprising a lens barrel and a first lens, an opening is formed on the object side end surface of the lens barrel; the first lens comprises a first optical part opposite to the opening and a first cam part surrounding the first optical part, the image side surface of the first cam part comprises a first matching surface, a first cam surface and a second matching surface connected in sequence, the second matching surface is connected with the image side surface of the first optical part away from the side of the first cam surface, the first matching surface and the second matching surface form an included angle with the first cam surface, and the first matching surface, the first cam surface and the second matching surface are connected with the object side end surface of the lens barrel. By setting the first cam part to be cammed with the object side end surface of the lens barrel, the edge thickness of the first lens is ensured, which is beneficial to molding and demolding, at the same time, since the first lens is cammed outside the lens barrel, the stray light generated by the camming between the first lens and the second lens is eliminated, and the imaging quality is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical imaging technology, and particularly relates to a camera module and an electronic device with the same. BACKGROUND

[0002] In recent years, the full-screen craze has swept the market, and has become a basic configuration of mobile phones. Camera solutions are also constantly innovating and breaking through. At present, small head camera, which exposes part of the first lens structure close to the object side outside the lens barrel, and increases blackening treatment, so that the surface will not transmit light. However, the first lens is thick, which poses great challenges to demolding and molding.

[0003] In the prior art, in order to make the gate depth deep, which is beneficial to molding and demolding, a ridge structure is generally made between the first lens and the second lens to increase the edge thickness. However, due to the ridge structure, a lot of light will be reflected on the ridge structure, forming harmful light spots (stray light), which seriously affects the imaging quality. SUMMARY

[0004] The purpose of the present application is to provide a camera module which can eliminate stray light and has high imaging quality while facilitating molding and demolding.

[0005] To achieve the purpose of the present application, the present application provides the following technical solutions:

[0006] In a first aspect, the present application provides a camera module, which comprises a lens barrel and a first lens. The object side end surface of the lens barrel is provided with an opening. The first lens comprises a first optical part opposite to the opening and a first ridge part surrounding the first optical part. The image side surface of the first ridge part comprises a first matching surface, a first ridge surface and a second matching surface connected in sequence. The second matching surface, away from the first ridge surface, is connected with the image side surface of the first optical part. The first matching surface and the second matching surface form an included angle with the first ridge surface. The first matching surface, the first ridge surface and the second matching surface are connected with the object side end surface of the lens barrel.

[0007] The first matching surface and the second matching surface are arranged to form an angle with the first cam surface, and the first matching surface, the first cam surface and the second matching surface are connected with the object side end surface of the lens barrel, so that the first cam portion is positioned with the object side end surface of the lens barrel, facilitating the installation of the first lens, and ensuring the edge thickness of the first lens, which is beneficial to the molding and demolding of the first lens; meanwhile, under the same conditions, the thickness and outer diameter of the first lens can be reduced, further improving the molding and demolding of the first lens, which is beneficial to reducing the head size and the total optical length of the camera module, and better realizing the small head.

[0008] In an embodiment, the object side end surface of the lens barrel comprises a third matching surface, a second cam surface and a fourth matching surface connected in sequence, the fourth matching surface is located on the object side of the plane where the third matching surface is located, the third matching surface is connected with the first matching surface, the second cam surface is connected with the first cam surface, and the fourth matching surface is connected with the second matching surface. By arranging the fourth matching surface on the object side of the plane where the third matching surface is located, the thickness of the edge part of the first cam portion is thicker, which is beneficial to improve the molding and demolding, and the positioning accuracy of the first cam portion is higher, which is beneficial to the assembly of the first lens and the lens barrel.

[0009] In an embodiment, the object side surface of the first optical portion comprises a light entrance surface and a connecting surface, the light entrance surface faces away from the opening, and the connecting surface connects the light entrance surface and the object side surface of the first cam portion, and the light entrance surface and the object side surface of the first cam portion form an angle with the connecting surface. By arranging the light entrance surface and the object side surface of the first cam portion to form an angle with the connecting surface, the central thickness of the first lens can be designed, which is beneficial to realize the small head of the camera module.

[0010] In an embodiment, the connecting surface and the object side surface of the first cam portion are provided with a first light shielding structure. By arranging the first light shielding structure on the connecting surface and the object side surface of the first cam portion, the light from the non-optical effective area can be effectively prevented from entering the first lens to interfere with imaging, which is beneficial to improve the imaging quality.

[0011] In an embodiment, the object side surface of the first cam portion comprises a transition surface and an edge surface, the side of the transition surface away from the edge surface is connected with the connecting surface, and the dihedral angle formed by the edge surface and the transition surface is an obtuse angle. By arranging the dihedral angle formed by the edge surface and the transition surface to be an obtuse angle, the thickness of the first cam portion is more uniform, which is beneficial to reduce the molding difficulty, and the dihedral angle formed by the edge surface and the transition surface is greater than 90°, which is beneficial to form a draft angle for demolding, facilitating the demolding.

[0012] In an embodiment, a second light shielding structure is arranged between the second mating surface and the fourth mating surface. By arranging the second light shielding structure between the second mating surface and the fourth mating surface, the stray light of the first lens can be absorbed, and the imaging quality can be improved.

[0013] In an embodiment, the camera module further comprises a second lens arranged in the lens barrel; the second lens comprises a second optical part and a second cam part surrounding the second optical part, an object side surface of the second optical part is opposite to an image side surface of the first optical part, the second cam part comprises a fifth mating surface, a third cam surface and a sixth mating surface connected in sequence, the sixth mating surface is connected to the object side surface of the second optical part away from the third cam surface, the fifth mating surface and the sixth mating surface form an included angle with the third cam surface, and the fifth mating surface, the third cam surface and the sixth mating surface are connected to the inner surface of the lens barrel. By arranging the second lens in the lens barrel, the second lens and the first lens are separated, the stray light easily formed by the camming of the first lens and the second lens can be avoided, and meanwhile, the second lens is cammed on the inner surface of the lens barrel through the second cam part, so that the second lens has a larger size, and the difficulty of molding and demolding is reduced.

[0014] In an embodiment, the inner surface of the lens barrel comprises a seventh mating surface, a fourth cam surface and an eighth mating surface connected in sequence, the eighth mating surface is located on the object side of the plane where the seventh mating surface is located, the seventh mating surface is connected to the fifth mating surface, the fourth cam surface is connected to the third cam surface, and the eighth mating surface is connected to the sixth mating surface. By arranging the eighth mating surface on the object side of the plane where the seventh mating surface is located, the positioning accuracy of the second lens and the lens barrel can be improved, and the assembly of the second lens and the lens barrel can be facilitated.

[0015] In an embodiment, a third light shielding structure is arranged between the eighth mating surface and the sixth mating surface. By arranging the third light shielding structure between the eighth mating surface and the sixth mating surface, on the one hand, the stray light of the second lens can be absorbed, and the imaging quality can be improved, and on the other hand, the light emitted from the image side surface of the first optical part of the first lens can be prevented from entering the non-optical effective area of the second lens to interfere with imaging, and the imaging quality can be further improved.

[0016] In one embodiment, the camera module satisfies the condition: 0.4 < B / A < 0.8; wherein B is the size of the light entrance surface in the direction perpendicular to the optical axis, and A is the size of the first lens in the direction perpendicular to the optical axis. By satisfying B / A between 0.4 and 0.5, the first lens has a smaller outer diameter under the premise of ensuring that the light entrance surface has a reasonable outer diameter size, which is conducive to the demolding and molding of the first lens. It can be understood that when B / A is less than 0.4, it is not conducive to miniaturization, and when B / A is greater than 0.8, it is not conducive to imaging.

[0017] In one embodiment, the camera module satisfies the condition: 0.8mm < B < 4mm; wherein B is the size of the light entrance surface in the direction perpendicular to the optical axis. By satisfying B between 0.8mm and 4mm, the light entrance surface has a reasonable outer diameter size, which is conducive to miniaturization and ensuring imaging quality. It can be understood that when B is less than 0.8mm, it is not conducive to imaging, and when B is greater than 4mm, it is not conducive to miniaturization.

[0018] In one embodiment, the camera module satisfies the condition: 0.5 < C / D < 0.8; wherein C is the distance from the intersection of the light entrance surface and the optical axis to the object side surface of the first lens in the direction parallel to the optical axis, and D is the distance from the intersection of the light entrance surface and the optical axis to the first mating surface in the direction parallel to the optical axis. By satisfying C / D between 0.5 and 0.8, D has a smaller value, which is conducive to miniaturization while ensuring the molding and demolding of the first lens. It can be understood that when C / D is less than 0.5, the edge thickness of the first lens is too large, and the size of the camera module is too large, which is not conducive to miniaturization; when C / D is greater than 0.8, the edge thickness of the first lens is insufficient, which can cause demolding difficulty and molding failure.

[0019] In one embodiment, the camera module satisfies the condition: 0.8mm < D < 1.3mm; wherein D is the distance from the intersection of the light entrance surface and the optical axis to the first mating surface in the direction parallel to the optical axis. By satisfying D between 0.8mm and 1.3mm, the first lens has a reasonable center thickness, which is conducive to ensuring imaging quality. It can be understood that when D is less than 0.8mm, the center thickness of the first lens is too small, which is not conducive to optical imaging; and when D is greater than 1.3mm, the center thickness of the first lens is too large, which is not conducive to the miniaturization design of the camera module.

[0020] In an embodiment, the camera module satisfies a condition formula: 0.1mm < G < 0.15mm; wherein G is a distance between the first fitting surface and the second fitting surface in a direction parallel to the optical axis. By satisfying G between 0.1mm and 0.15mm, the first fitting surface and the second fitting surface have a reasonable distance, while ensuring the accuracy of the camber, the thickness difference of the first camber is smaller, which is conducive to the forming of the first lens. It can be understood that when G < 0.1mm, the distance between the first fitting surface and the second fitting surface is too short, the area of the first fitting surface is too small, and the accuracy of the camber is low; when G > 0.15mm, the distance between the first fitting surface and the second fitting surface is too long, resulting in a large thickness difference of the first camber, which is not conducive to the forming of the first lens.

[0021] In an embodiment, the first camber surface has a first inclined line connecting the first fitting surface and the second fitting surface, the first inclined line is coplanar with the optical axis, and the camera module satisfies a condition formula: 20° < H < 30°; wherein H is an included angle formed by the first inclined line and the optical axis. By setting H between 20° and 30°, the first camber surface has a reasonable slope, the structural strength of the connection between the first lens and the lens barrel is higher, while ensuring accurate positioning, it also has a draft angle that is conducive to demolding, which is conducive to demolding. It can be understood that when H < 20°, the slope of the first camber surface is too small, which is not conducive to the installation of the first lens and the lens barrel, and the demolding of the first lens. When H > 30°, the slope of the first camber surface is too large, the positioning accuracy is low, and the structural strength of the connection between the first lens and the lens barrel is low.

[0022] In an embodiment, the connecting surface has a second inclined line connecting the light entrance surface and the object side surface of the first camber, the second inclined line is coplanar with the optical axis, and the camera module satisfies a condition formula: 8° < F < 20°; wherein F is an included angle formed by the second inclined line and the optical axis. By satisfying F between 8° and 20°, it is conducive to the design of small head, and the demolding difficulty is reduced. It can be understood that when F < 8°, the slope of the connecting surface is too small, which is not conducive to demolding; when F > 20°, the slope of the connecting surface is too large, which is not conducive to the small head design.

[0023] In an embodiment, the camera module satisfies a condition formula: 3.2mm < E < 7mm; wherein E is the total length of the camera module in the direction of the optical axis. By satisfying E between 3.2mm and 7mm, the camera module can have a shorter total length, while the first lens is arranged outside the lens barrel, the installation freedom of other lenses in the lens barrel is higher, and the assembly selectivity is higher. It can be understood that when E < 3.2mm, the total length of the camera module is too short, the installation freedom of the lenses in the lens barrel is low, and the assembly selectivity is insufficient; when E > 7mm, the total length of the camera module is too long, which is not conducive to miniaturization design.

[0024] Secondly, the present invention also provides an electronic device including the camera module described in any of the first aspects. By incorporating the camera module provided by the present invention into the existing camera module, it is beneficial to reduce the size of the electronic device and improve the imaging quality of the electronic device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a structural diagram of a camera module in the prior art;

[0027] Figure 2 This is a schematic diagram of the structure of a camera module according to one embodiment of the present invention;

[0028] Figure 3 for Figure 2 A schematic diagram of the structure of the first lens;

[0029] Figure 4 for Figure 2 A schematic diagram of the microscope tube structure;

[0030] Figure 5 This is a schematic diagram of the structure of a camera module according to another embodiment of the present invention;

[0031] Figure 6 for Figure 5 A schematic diagram of the structure of the second lens;

[0032] Figure 7 for Figure 5 A schematic diagram of the lens tube structure. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1In the camera module 100 in the prior art, the first lens 120 and the second lens 130 are both arranged in the lens barrel 110, and the optical part 1210 of the first lens 120 extends out of the opening 140 of the lens barrel 110. The image side surface 1220 of the first lens 120 and the object side surface 1310 of the second lens 130 are connected in a form of a dovetail structure 1230. Light is easily reflected on the dovetail structure 1230 to form stray light, which seriously affects the imaging quality. Moreover, the first lens 120 is arranged in the lens barrel 110, and the size of the outer diameter of the first lens 120 is limited. In order to ensure that the stray light of the dovetail structure 1230 does not affect the optical effective area of the second lens 130, the dovetail structure 1230 and the effective area of the object side surface 1310 of the second lens 130 need to be kept a certain distance, which results in that the outer diameter of the first lens 120 is too large. In addition, in order to ensure that the optical part 1210 of the first lens 120 can extend out of the opening 140 by a certain distance, the first lens 120 needs to have a sufficient center thickness, which also makes the thickness of the first lens 120 large, and it is difficult to demold and form.

[0035] Please refer to Figure 2 The embodiment of the present application provides a camera module 200. The camera module 200 can be a separate lens of a digital camera, or an imaging module integrated on an electronic device such as a smart phone. The camera module 200 comprises a lens barrel 10 and a first lens 20. The object side end surface 101 of the lens barrel 10 is provided with an opening 102. The first lens 20 comprises a first optical part 21 opposite to the opening 102 and a first dovetail part 22 surrounding the first optical part 21. The image side surface of the first dovetail part 22 comprises a first matching surface 221, a first dovetail surface 222 and a second matching surface 223 connected in sequence. The second matching surface 223 is connected with the image side surface 213 of the first optical part 21 on the side away from the first dovetail surface 222. The first matching surface 221 and the second matching surface 223 form an included angle with the first dovetail surface 222. The first matching surface 221, the first dovetail surface 222 and the second matching surface 223 are all connected with the object side end surface 101 of the lens barrel 10.

[0036] Specifically, the first lens 20 is made by injection molding methods such as point pouring, side pouring or direct pouring, and the material of the first lens 20 and the shell can be hard plastic such as acrylonitrile-butadiene-styrene copolymer (ABS), co-polyester (PETG), polycarbonate (PC), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC) and the like. The first mating surface 221 and the second mating surface 223 as well as the first abutment surface 222 are preferably flat. The image side surface 213 of the first optical part 21 has a size smaller than the size of the opening 102 in a direction perpendicular to the optical axis 91, so as to facilitate normal imaging of the optical effective area. The image side surface 213 of the first optical part 21 can partially extend into the opening 102 or can be entirely on the image side of the opening 102. The first lens 20 can be fixed after being abutted with the lens barrel 10 by the adhesive 12. The camera module 200 further comprises a photosensitive element (not shown) disposed on the image side of the plurality of lenses, for converting light rays of an object incident on the photosensitive element through the first lens to the fifth lens into an electrical signal of an image. The photosensitive element can be a complementary metal oxide semiconductor (CMOS) or a charge-coupled device (CCD).

[0037] By setting the first mating surface 221 and the second mating surface 223 to form an included angle with the first abutment surface 222, and connecting the first mating surface 221, the first abutment surface 222 and the second mating surface 223 with the object side end surface 101 of the lens barrel 10, the first abutment part 22 is positioned by abutting with the object side end surface 101 of the lens barrel 10, so as to facilitate installation of the first lens 20, and to ensure the edge thickness of the first lens 20, which is beneficial to molding and demolding. Meanwhile, under the same conditions, the thickness and outer diameter of the first lens 20 can be reduced, which further improves the molding and demolding of the first lens 20, and is beneficial to reducing the head size and the total optical length of the camera module 200, and better realizes small head. In addition, since the first lens 20 is abutted outside the lens barrel 10, the stray light generated by abutting between the first lens 20 and the second lens 30 is eliminated, and the imaging quality is improved.

[0038] It can be understood that, since the first lens 20 is arranged outside the lens barrel 10, the first lens 20 is engaged with the object side end surface 101 of the lens barrel 10, so that the engagement position is not limited by the size of the inner surface 103 of the lens barrel 10, and since the first lens 20 is engaged with the lens barrel 10, the engagement structure does not produce stray light, which is conducive to reducing the outer diameter size of the first lens 20. Moreover, it is not necessary to ensure that the optical portion of the first lens 20 extends out of the opening 102 by a certain distance, and the first lens 20 has no thickness limitation, which is also conducive to shortening the thickness of the first lens 20, facilitating demolding and molding. Moreover, arranging the first lens 20 outside the lens barrel 10 makes sufficient installation space for other lenses in the lens barrel 10, which is conducive to shortening the overall length of the camera module 200.

[0039] In an embodiment, referring to Figures 2 to 4 , the object side end surface 101 of the lens barrel 10 includes a third matching surface 111, a second engagement surface 112 and a fourth matching surface 113 connected in sequence. The fourth matching surface 113 is located on the object side of the plane where the third matching surface 111 is located (i.e., the fourth matching surface 113 is closer to the object). The third matching surface 111 is connected with the first matching surface 221, the second engagement surface 112 is connected with the first engagement surface 222, and the fourth matching surface 113 is connected with the second matching surface 223. Specifically, the third matching surface 111 and the first matching surface 221 are attached, the fourth matching surface 113 and the second matching surface 223 are attached, and the second engagement surface 112 and the first engagement surface 222 are attached. By arranging the fourth matching surface 113 on the object side of the plane where the third matching surface 111 is located, the thickness of the edge portion of the first engagement portion 22 is thicker, which is conducive to improving molding and demolding, and the positioning accuracy of the first engagement portion 22 is higher, which is conducive to the assembly of the first lens 20 and the lens barrel 10.

[0040] In an embodiment, referring to Figures 2 to 4 , the object side surface of the first optical portion 21 includes a light entrance surface 211 and a connecting surface 212, and the light entrance surface 211 faces away from the opening 102. The connecting surface 212 connects the light entrance surface 211 and the object side surface of the first engagement portion 22, and the light entrance surface 211 and the object side surface of the first engagement portion 22 each form an angle with the connecting surface 212. Specifically, the image side surface 213 of the first optical portion 21 and the light entrance surface 211 can be spherical or aspherical. The surface type can be concave or convex. By arranging the object side surface of the light entrance surface 211 and the first engagement surface 222 to form an angle with the connecting surface 212, the central thickness of the first lens 20 is facilitated to be designed, which is conducive to the miniaturization of the camera module 200.

[0041] In an embodiment, referring to Figures 2 to 4The object side of the first lens 20 and the connecting surface 212 are provided with first light shielding structures. The first light shielding structures can effectively prevent light from entering the non-optical effective area of the first lens 20, thereby improving the imaging quality.

[0042] In one embodiment, referring to Figures 2 to 4 The object side of the first lens 22 includes a transition surface 224 and an edge surface 225, and the side of the transition surface 224 away from the edge surface 225 is connected to the connecting surface 212. The dihedral angle K formed by the edge surface 225 and the transition surface 224 is an obtuse angle. Specifically, the first lens 22 further includes an outer peripheral surface 226, and the outer peripheral surface 226 connects the edge surface 225 and the first mating surface 221. The adhesive 12 is arranged on the outer peripheral surface 226 and connected to the object side end surface 101 of the lens barrel 10. The dihedral angle K formed by the edge surface 225 and the transition surface 224 is an obtuse angle, which is conducive to making the thickness of the first lens 22 more uniform, thereby reducing the difficulty of molding. Moreover, the dihedral angle K formed by the edge surface 225 and the transition surface 224 is greater than 90°, which is conducive to forming a draft angle that facilitates demolding, thereby facilitating demolding.

[0043] In one embodiment, referring to Figures 2 to 4 The second mating surface 223 and the fourth mating surface 113 are provided with a second light shielding structure 13. The second light shielding structure 13 can absorb stray light of the first lens 20, thereby improving the imaging quality.

[0044] In one embodiment, referring to Figure 5 and Figure 6 The camera module 200 further includes a second lens 30 arranged in the lens barrel 10. The second lens 30 includes a second optical portion 31 and a second lens barrel 32 surrounding the second optical portion 31. The object side 311 of the second optical portion 31 is opposite to the image side 213 of the first optical portion 21. The second lens barrel 32 includes a fifth mating surface 321, a third lens barrel surface 322, and a sixth mating surface 323 connected in sequence. The sixth mating surface 323 is connected to the object side 311 of the second optical portion 31 away from the third lens barrel surface 322. The fifth mating surface 321 and the sixth mating surface 323 form an included angle with the third lens barrel surface 322. The fifth mating surface 321, the third lens barrel surface 322, and the sixth mating surface 323 are connected to the inner surface 103 of the lens barrel 10. By arranging the second lens 30 in the lens barrel 10, the second lens 30 and the first lens 20 are separated, which can avoid the stray light caused by the lens barrel of the first lens 20 and the second lens 30. Moreover, the second lens 30 is lens-barrelled on the inner surface 103 of the lens barrel 10 through the second lens barrel 32, so that the second lens 30 has a large edge thickness, thereby reducing the difficulty of molding and demolding.

[0045] In other embodiments, one or more lenses can also be arranged inside the lens barrel 10 on the side of the second lens 30 facing away from the first lens 20, and the camera module 200 can have a five-lens, six-lens, seven-lens, or other structure. The camera module 200 can also be a periscope camera module.

[0046] In one embodiment, referring to Figures 5 to 7 , the inner surface 103 of the lens barrel 10 includes a seventh mating surface 121, a fourth cam surface 122, and an eighth mating surface 123 connected in sequence, the eighth mating surface 123 is located on the object side of the plane in which the seventh mating surface 121 is located (i.e., the eighth mating surface 123 is closer to the object), the seventh mating surface 121 is connected to the fifth mating surface 321, the fourth cam surface 122 is connected to the third cam surface 322, and the eighth mating surface 123 is connected to the sixth mating surface 323. By arranging the eighth mating surface 123 on the object side of the plane in which the seventh mating surface 121 is located, the positioning accuracy of the second lens 30 and the lens barrel 10 can be improved, and the assembly of the second lens 30 and the lens barrel 10 is facilitated.

[0047] In other embodiments, as shown in Figure 2 , the object side surface of the second lens 30 is in contact with the inner surface 103 of the lens barrel 10. It can be understood that when the structural strength of the connection between the second lens 30 and the lens barrel 10 is sufficient, the cam structure (second cam portion 32) can not be arranged between the second lens 30 and the lens barrel 10 to avoid the generation of stray light.

[0048] In one embodiment, referring to Figures 5 to 7 , a third light shielding structure 14 is arranged between the eighth mating surface 123 and the sixth mating surface 323. By arranging the third light shielding structure 14 between the eighth mating surface 123 and the sixth mating surface 323, on the one hand, the stray light of the second lens 30 can be absorbed, which is conducive to improving the imaging quality, and on the other hand, the light emitted from the image side surface 213 of the first optical portion 21 of the first lens 20 can be prevented from entering the non-optical effective area of the second lens 30 to interfere with imaging, which is conducive to further improving the imaging quality.

[0049] In one embodiment, referring to Figure 2 and Figure 3 , the camera module 200 satisfies the condition formula:

[0050] 0.4 < B / A < 0.8;

[0051] wherein B is the size of the light entrance surface 211 in the direction perpendicular to the optical axis 91 (in this embodiment, the outer contour of the light entrance surface 211 is circular, so B is the outer diameter of the light entrance surface 211), and A is the size of the first lens 20 in the direction perpendicular to the optical axis 91. Referring to Figure 1, the prior art camera module 100 satisfies 0.3mm < B1 / A1 < 0.5mm, wherein B1 represents the size which can refer to B in the embodiment, and A1 represents the size which can refer to A in the embodiment, and details are not repeated here. It can be seen that the outer diameter A1 of the first lens 120 in the prior art is too large, which is not conducive to the flow of the plastic solution, and is prone to cause the first lens 120 to be difficult to demold and form. The embodiment satisfies B / A between 0.4 and 0.5, which is conducive to the first lens 20 having a smaller outer diameter under the premise of ensuring that the light entrance surface 211 has a reasonable outer diameter size, and is conducive to the demolding and forming of the first lens 20. It can be understood that when B / A is less than 0.4, it is not conducive to miniaturization, and when B / A is greater than 0.8, it is not conducive to imaging. The value of B / A can be 0.4, 0.43, 0.54, 0.68, 0.75, 0.8, etc.

[0052] In an embodiment, referring to Figure 2 and Figure 3 , the camera module 200 satisfies the condition formula:

[0053] 0.8mm < B < 4mm;

[0054] wherein B is the size of the light entrance surface 211 in the direction perpendicular to the optical axis 91. By satisfying B between 0.8mm and 4mm, the light entrance surface 211 has a reasonable outer diameter size, which is conducive to miniaturization and ensures imaging quality. It can be understood that when B is less than 0.8mm, it is not conducive to imaging, and when B is greater than 4mm, it is not conducive to miniaturization. The value of B can be 0.8mm, 1.2mm, 1.6mm, 2.8mm, 3.4mm, 3.8mm, 4mm, etc.

[0055] In an embodiment, referring to Figure 2 and Figure 3 , the camera module 200 satisfies the condition formula:

[0056] 0.5 < C / D < 0.8;

[0057] wherein C is the distance from the intersection of the light entrance surface 211 and the optical axis 91 to the object side surface of the first joint 22 in the direction parallel to the optical axis 91, and D is the distance from the intersection of the light entrance surface 211 and the optical axis 91 to the first fitting surface 221 in the direction parallel to the optical axis 91. Referring to Figure 1, the prior art camera module 100 satisfies 0.4mm < C1 / D1 < 0.6mm, C1 represents the height of the optical part 1210 protruding from the lens barrel 110, and D1 represents the size which can refer to D in the embodiment. It can be seen that the value of D1 in the prior art is too large, which is easy to cause the thickness of the first lens 120 to be too large, which is not conducive to the flow of the plastic melt, causing molding and demolding to be difficult. The embodiment satisfies C / D between 0.5 and 0.8, and the value of D is small, which is conducive to the molding and demolding of the first lens 20 while realizing small head. It can be understood that when C / D < 0.5, the edge thickness of the first lens 20 is too large, and the size of the camera module 200 is too large, which is not conducive to realizing small head; when C / D > 0.8, the edge thickness of the first lens 20 is insufficient, which is easy to cause demolding difficulty and molding failure. The value of C / D can be 0.5, 0.56, 0.6, 0.65, 0.71, 0.75, 0.8, etc.

[0058] In an embodiment, referring to Figure 2 and Figure 3 , the camera module 200 satisfies the condition formula:

[0059] 0.8mm < D < 1.3mm;

[0060] wherein D is the distance from the intersection of the light entrance surface 211 and the optical axis 91 to the first mating surface 221 in the direction parallel to the optical axis 91. Referring to Figure 1 , the prior art camera module 100 satisfies 1.1mm < D1 < 1.4mm, and D1 represents the size which can refer to D in the embodiment. The drawbacks caused by the excessively large value of D1 leading to the excessively thick first lens 120 have been described in the previous embodiment, which will not be repeated here. By satisfying D between 0.8mm and 1.3mm, the first lens 20 has a reasonable center thickness, which is conducive to ensuring the imaging quality. It can be understood that when D < 0.8mm, the center thickness of the first lens 20 is too small, which is not conducive to optical imaging; when D > 1.3mm, the center thickness of the first lens 20 is too large, which is not conducive to the miniaturization design of the camera module 200. The value of D can be 0.8mm, 0.85mm, 0.95mm, 0.98mm, 1.12mm, 1.24mm, 1.3mm, etc.

[0061] In an embodiment, referring to Figure 2 and Figure 3 , the camera module 200 satisfies the condition formula:

[0062] 0.1mm < G < 0.15mm;

[0063] G is the distance between the first fitting surface 221 and the second fitting surface 223 in the direction parallel to the optical axis 91. By satisfying G between 0.1 mm and 0.15 mm, the first fitting surface 221 and the second fitting surface 223 have a reasonable distance, while ensuring the accuracy of the camber, the thickness difference of the first camber 22 is smaller, which is beneficial to the molding of the first lens 20. It can be understood that when G < 0.1 mm, the distance between the first fitting surface 221 and the second fitting surface 223 is too short, the area of the first camber surface 222 is too small, and the accuracy of the camber is low; when G > 0.15 mm, the distance between the first fitting surface 221 and the second fitting surface 223 is too long, which leads to the thickness difference of the first camber 22 being too large, which is not conducive to the molding of the first lens 20. The value of G can be 0.1 mm, 0.11 mm, 0.113 mm, 0.123 mm, 0.135 mm, 0.146 mm, 0.15 mm, etc.

[0064] In an embodiment, referring to Figure 2 and Figure 3 , the first camber surface 222 has a first inclined line connecting the first fitting surface 221 and the second fitting surface 223, the first inclined line is coplanar with the optical axis 91, and the camera module 200 satisfies the condition formula:

[0065] 20° < H < 30°;

[0066] wherein H is the included angle formed by the first inclined line and the optical axis 91. By setting H between 20° and 30°, the first camber surface 222 has a reasonable slope, and the structural strength of the connection between the first lens 20 and the lens barrel 10 is higher, which is beneficial to the demolding slope while ensuring accurate positioning. It can be understood that when H < 20°, the slope of the first camber surface 222 is too small, which is not conducive to the installation of the first lens 20 and the lens barrel 10, and the demolding of the first lens 20. When H > 30°, the slope of the first camber surface 222 is too large, the positioning accuracy is low, and the structural strength of the connection between the first lens 20 and the lens barrel 10 is low. The value of H can be 20°, 21°, 23°, 25.5°, 26°, 27.6°, 28°, 30°, etc.

[0067] In an embodiment, referring to Figure 2 and Figure 3 , the connecting surface 212 has a second inclined line connecting the light entrance surface 211 and the object side surface of the first camber 22, the second inclined line is coplanar with the optical axis 91, and the camera module 200 satisfies the condition formula:

[0068] 8° < F < 20°;

[0069] Wherein, F is the included angle between the second inclined line and the optical axis 91. By satisfying F between 8° and 20°, the design of the small head is facilitated, and the difficulty of demolding is reduced. It can be understood that when F < 8°, the slope of the connecting surface 212 is too small, which is not conducive to demolding; when F > 20°, the slope of the connecting surface 212 is too large, which is not conducive to the small head design. The value of F can be 8°, 12°, 13°, 15°, 17°, 18°, 20°, etc.

[0070] In an embodiment, referring to Figure 2 and Figure 3 , the camera module 200 satisfies the condition formula:

[0071] 3.2mm < E < 7mm;

[0072] Wherein, E is the total length of the camera module 200 in the direction of the optical axis 91. Referring to Figure 1 , the prior art camera module 100 satisfies 3.4mm < E1 < 7mm, and the size represented by E1 can refer to E in the present embodiment. It can be seen that the total length of the camera module 100 in the prior art is limited to 3.4mm due to the unreasonable structure of the first lens 120. By satisfying E between 3.2mm and 7mm, the camera module 200 can have a shorter total length. Under the premise that the first lens is arranged outside the lens barrel 10, the installation freedom of other lenses in the lens barrel 10 is higher, and the assembly selectivity is higher. It can be understood that when E < 3.2mm, the total length of the camera module 200 is too short, the installation freedom of the lens in the lens barrel 10 is low, and the assembly selectivity is insufficient; when E > 7mm, the total length of the camera module 200 is too long, which is not conducive to miniaturization design. The value of E can be 3.2mm, 3.9mm, 4.5mm, 5.9mm, 6.3mm, 7mm, etc.

[0073] Specifically, the first light shielding structure, the second light shielding structure 13 and the third light shielding structure 14 can be selected from light shielding sheets, light absorbing films and black coatings that can absorb light. Among them, the first light shielding structure is preferably a black coating formed by ink coating, and the second light shielding structure 13 and the third light shielding structure 14 are preferably light shielding sheets.

[0074] Referring to Figure 2 , the present application also provides an electronic device comprising the camera module 200 provided by the present application. Specifically, the electronic device further comprises a shell (not shown), and the camera module is arranged in the shell. The electronic device can be a smart phone, a personal digital assistant (PDA), a tablet computer, a smart watch, a drone, an electronic book reader, a car recorder, a wearable device and a monitoring and security device, etc. By adding the camera module 200 provided by the present application to the camera module 200, the size of the electronic device can be reduced, and the imaging quality of the electronic device can be improved.

[0075] The above-described embodiments are merely intended to illustrate the present application, but are not intended to limit the scope of the present application. Those skilled in the art can understand that all or part of the above-described embodiments can be implemented, and equivalent changes made to the present application according to the claims, still belong to the scope of the present application.

Claims

1. A camera module, characterized in that, The lens includes a lens barrel and a first lens. The object-side end face of the lens barrel has an opening. The first lens includes a first optical part opposite to the opening and a first locking part surrounding the first optical part. The image-side surface of the first locking part includes a first mating surface, a first locking surface, and a second mating surface connected in sequence. The side of the second mating surface away from the first locking surface is connected to the image-side surface of the first optical part. The first mating surface and the second mating surface both form an angle with the first locking surface. The first mating surface, the first locking surface, and the second mating surface are all connected to the object-side end face of the lens barrel. The first lens is locked outside the lens barrel. The object-side surface of the first optical part includes a light-incident surface and a connecting surface. The light-incident surface faces away from the opening, and the connecting surface connects the light-incident surface and the object-side surface of the first retaining part. Both the light-incident surface and the object-side surface of the first retaining part form an angle with the connecting surface.

2. The camera module as described in claim 1, characterized in that, The object-side end face of the lens barrel includes a third mating surface, a second mating surface, and a fourth mating surface connected in sequence. The fourth mating surface is located on the object side of the plane in which the third mating surface is located. The third mating surface is connected to the first mating surface, the second mating surface is connected to the first mating surface, and the fourth mating surface is connected to the second mating surface.

3. The camera module as described in claim 2, characterized in that, The camera module satisfies the following condition: 0.1mm < G < 0.15mm; Wherein, G is the distance between the first mating surface and the second mating surface in a direction parallel to the optical axis.

4. The camera module as described in claim 1, characterized in that, The first mating surface has a first oblique line connecting the first mating surface and the second mating surface, the first oblique line being coplanar with the optical axis, and the camera module satisfying the following condition: 20°＜H＜30°； Wherein, H is the angle formed by the first oblique line and the optical axis.

5. The camera module as described in claim 1, characterized in that, Both the connecting surface and the object side of the first retaining part are provided with a first light-shielding structure.

6. The camera module as described in claim 1, characterized in that, The first mating part has a transition surface and an edge surface on its side. The side of the transition surface away from the edge surface is connected to the connecting surface. The dihedral angle formed by the edge surface and the transition surface is an obtuse angle.

7. The camera module as described in claim 1, characterized in that, The connecting surface has a second oblique line connecting the light-incident surface and the object-side surface of the first mating part, the second oblique line being coplanar with the optical axis, and the camera module satisfies the following condition: 8°＜F＜20°； Wherein, F is the angle formed between the second oblique line and the optical axis.

8. The camera module as described in claim 2, characterized in that, A second light-shielding structure is provided between the second mating surface and the fourth mating surface.

9. The camera module as described in claim 1, characterized in that, The camera module further includes a second lens disposed within the lens barrel. The second lens includes a second optical part and a second mating part surrounding the second optical part. The object side of the second optical part faces the image side of the first optical part. The second mating part includes a fifth mating surface, a third mating surface, and a sixth mating surface connected in sequence. The side of the sixth mating surface away from the third mating surface is connected to the object side of the second optical part. The fifth mating surface and the sixth mating surface both form an angle with the third mating surface. The fifth mating surface, the third mating surface, and the sixth mating surface are all connected to the inner surface of the lens barrel.

10. The camera module as described in claim 9, characterized in that, The inner surface of the lens barrel includes a seventh mating surface, a fourth mating surface, and an eighth mating surface connected in sequence. The eighth mating surface is located on the object side of the plane in which the seventh mating surface is located. The seventh mating surface is connected to the fifth mating surface, the fourth mating surface is connected to the third mating surface, and the eighth mating surface is connected to the sixth mating surface.

11. The camera module as described in claim 10, characterized in that, A third light-shielding structure is provided between the eighth mating surface and the sixth mating surface.

12. The camera module as described in claim 1, characterized in that, The camera module satisfies the following condition: 0.4 < B / A < 0.8; Wherein, B is the dimension of the incident light surface in the direction perpendicular to the optical axis, and A is the dimension of the first lens in the direction perpendicular to the optical axis.

13. The camera module as described in claim 1, characterized in that, The camera module satisfies the following condition: 0.8mm < B < 4mm; Wherein, B is the dimension of the incident surface in the direction perpendicular to the optical axis.

14. The camera module as described in claim 1, characterized in that, The camera module satisfies the following condition: 0.5 < C / D < 0.8; Wherein, C is the distance from the intersection of the incident light surface and the optical axis to the object side surface of the first mating part in a direction parallel to the optical axis, and D is the distance from the intersection of the incident light surface and the optical axis to the first mating surface in a direction parallel to the optical axis.

15. The camera module as described in claim 1, characterized in that, The camera module satisfies the following condition: 0.8mm < D < 1.3mm; Wherein, D is the distance from the intersection of the incident light surface and the optical axis to the first mating surface in a direction parallel to the optical axis.

16. The camera module as described in claim 1, characterized in that, The camera module satisfies the following condition: 3.2mm < E < 7mm; Where E is the total length of the camera module along the optical axis.

17. An electronic device, characterized in that, Includes the camera module as described in any one of claims 1 to 16.

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