A lens assembly, a lens group, a camera module and a terminal device

Abstract

The embodiment of the application provides a lens assembly, a lens assembly, a camera module and a terminal device, the lens assembly comprises a first lens provided with a first optical part and a first edge part and a second lens provided with a second optical part and a second edge part, a gap is arranged between the first optical part and the second optical part and the first optical part and the second optical part are opposite. The gap is filled with glue. The first edge part and the second edge part are respectively provided with a first bearing surface and a second bearing surface, and the two bearing surfaces are opposite, so as to ensure the stability of the lens assembly. The first edge part is provided with a first axial groove, and the second bearing surface is provided with a second axial groove. The two grooves are communicated with the gap, so that the glue can flow into the first axial groove and the second axial groove from the gap, and air is driven out, so as to ensure the effect when photographing. And the two grooves all have glue storage spaces, after the glue fills the grooves, the thickness of the glue between the two lenses is increased, and then the bonding strength of the two lenses is increased.

Description

Technical Field

[0001] This application relates to the field of optical imaging, and more particularly to a lens assembly, a camera module, and a terminal device. Background Technology

[0002] The lens assembly is one of the key components of the camera module. The lens assembly and the lens barrel together form a lens, which is installed inside the camera module to transmit the captured image information.

[0003] Most lens assemblies use adhesive to bond two lenses together. However, due to manufacturing tolerances, this method can easily lead to air pockets at the bonding surface between the two lenses. During venting, these air bubbles can form, causing a decrease in lens performance. Furthermore, because the bonding surface between the two lenses is relatively thin, deformation of the lenses during high-temperature curing can easily cause the adhesive layer between them to break, leading to camera module failure and significant losses for the company. Utility Model Content

[0004] This application provides a lens assembly that can expel air between two lenses while ensuring high bonding strength between the two lenses, thereby guaranteeing the reliability of the lens and the shooting effect.

[0005] To achieve the above objectives, in a first aspect, this application proposes a lens assembly comprising a first lens and a second lens, the first lens and the second lens being arranged sequentially along the optical axis of the lens assembly. The first lens includes a first optical portion and a first edge portion surrounding the first optical portion; the second lens includes a second optical portion and a second edge portion surrounding the second optical portion. The first optical portion and the second optical portion are disposed opposite to each other, with a gap between them for filling with adhesive. The first edge portion includes a first abutment surface facing the second edge portion; the second edge portion includes two abutment surfaces, the first abutment surface and the second abutment surface being disposed opposite to each other. The first abutment surface has a first axial groove, and the second abutment surface has a second axial groove, both of which communicate with the gap.

[0006] This application provides a first bearing surface at the first edge of the lens periphery and a second bearing surface at the second edge of the lens periphery, with the first and second bearing surfaces positioned opposite each other to ensure radial stability between the two lenses. A first axial groove and a second axial groove are respectively provided on the first and second bearing surfaces to accommodate adhesive, thereby enhancing the bonding strength between the first and second lenses. Both the first bearing groove and the second axial groove communicate with the gap and the outside of the lens assembly, allowing the gap to connect to the outside of the lens assembly via the first and second axial grooves. During adhesive injection, the adhesive disperses from the center of the lens outwards and flows into the first and second axial grooves. This design facilitates airflow between the space between the lens assemblies and the outside; the adhesive can replace the air and drive it out from the first and second axial grooves to the outside of the lens assembly, thus ensuring the imaging effect of the lens assembly. Furthermore, the first and second axial grooves increase the adhesive's accommodating space, further enhancing the bonding strength between the two lenses.

[0007] As an optional implementation, in this embodiment of the application, at least a portion of the first axial groove and the second axial groove are opposite each other along the optical axis direction; or, along the circumferential direction of the lens assembly, the first axial groove and the second axial groove are staggered between the first bearing surface and the second bearing surface. By arranging the first and second axial grooves at least partially opposite each other, they can combine to form a deeper recess. Adhesive fills this recess, increasing the adhesive's capacity and thus enhancing the bond strength between the two lenses. Furthermore, by staggering the first and second axial grooves along the circumferential direction of the lens assembly between the first and second support surfaces, the first and second axial grooves are widely distributed circumferentially, providing a sufficient adhesive-containing space in the gaps between the first and second support surfaces, further increasing the bond strength. Simultaneously, the adhesive within the gaps is dispersed into the first and second axial grooves along the circumferential direction between the first and second support surfaces, increasing the adhesive venting range and improving the imaging effect of the lens assembly.

[0008] As an optional implementation, in this embodiment of the application, the depth of the first axial groove along the optical axis is in the range of 0.03mm-0.05mm; or, the depth of the second axial groove along the optical axis is in the range of 0.03mm-0.05mm.

[0009] By setting the depth range of the first axial groove and the second radial groove along the optical axis to 0.03mm-0.05mm, the air venting effect and bonding strength between the two lenses are ensured, while avoiding the two grooves from being too deep, which would make the lenses difficult to demold.

[0010] As an optional implementation, in this embodiment of the application, the first edge portion is provided with a circumferential groove, and the second edge portion is provided with a circumferential protrusion. Along the optical axis direction, the circumferential protrusion is used to insert into the circumferential groove. Along the radial direction of the optical axis, at least one sidewall away from the first optical part is provided with a radial groove between the circumferential groove and the circumferential protrusion. The radial groove is concave in the radial direction of the optical axis, and the gap, the radial groove and the first axial groove are connected in sequence.

[0011] By sequentially connecting the gap, radial groove, and first axial groove, the gap can connect to the outside of the lens assembly through the first axial groove and radial groove. During adhesive injection, the adhesive can disperse from the center of the lens outwards and flow into the radial groove, and then into the first axial groove. This facilitates airflow between the gap and the outside of the lens assembly. The flow of adhesive drives air to be discharged from the first axial groove to the outside of the lens assembly, thereby ensuring the imaging effect of the lens assembly. Furthermore, the design of the first axial groove and radial groove increases the adhesive capacity, thereby enhancing the bonding strength between the two lenses.

[0012] As an optional implementation, in this embodiment of the application, the number of the first axial groove and the number of the radial groove are at least two, the at least two first axial grooves are arranged at equal intervals along the circumference of the first edge, and the at least two radial grooves are arranged at equal intervals along the circumference of the first edge.

[0013] By arranging at least two first axial grooves evenly and spaced apart along the circumference of the first edge, and at least two radial grooves evenly and spaced apart along the circumference of the first edge, a uniformly distributed adhesive storage space with consistent groove depth is formed between the two lenses. Adhesive fills this storage space, ensuring uniform stress distribution around the lens assembly and preventing stress concentration caused by uneven groove distribution, which could lead to lens assembly breakage. This also improves the bonding strength between the two lenses, ensuring the stability of the internal structure of the lens assembly. Simultaneously, each first axial groove has a first opening, providing multiple flow paths for the adhesive and allowing it to diffuse evenly between the two lenses, thereby improving the air removal efficiency between them.

[0014] As an optional implementation, in this embodiment of the application, the first axial groove and the radial groove at least partially overlap along the circumference of the first edge portion along the optical axis direction; or, the first axial groove and the radial groove are arranged alternately along the circumference of the lens assembly.

[0015] By at least partially overlapping the first axial groove and the radial groove along the circumference of the lens assembly, the adhesive flowing into the radial groove can directly flow into the first axial groove, driving out air in the gap. This shortens the flow path of the adhesive at the first edge, thereby improving the air removal efficiency inside the lens assembly. Furthermore, by arranging the first axial groove and the radial groove alternately along the circumferential direction of the first edge, so that the first axial groove and the radial groove are located at different positions in the circumferential direction of the first edge, grooves with sufficient capacity to hold more adhesive are present at different positions in the circumferential direction of the lens, preventing localized adhesive failure that could lead to loosening of the lens assembly and increasing the bonding strength between the two lenses.

[0016] As an optional implementation, in this embodiment of the application, the radial groove sidewall includes a guide slope. In the direction perpendicular to the optical axis, the guide slope is inclined in the direction away from the bottom wall of the radial groove. The guide slope is connected between the bottom wall of the radial groove and the mating surface to guide the glue in the gap into the radial groove.

[0017] By setting the tilt direction of the guide slope, the guide slope can guide the glue to flow quickly from the gap and fill the radial groove, and make the glue quickly drive the air out of the lens assembly, thereby improving the air removal efficiency between the two lenses.

[0018] Secondly, this application provides a lens assembly, including a lens barrel and the aforementioned lens assembly. A portion of the lens assembly is disposed within the lens barrel and abuts against the inner wall of the lens barrel to ensure the stability of the lens assembly structure.

[0019] Thirdly, this application provides a camera module, including the aforementioned lens assembly, driving device, and housing. The lens assembly is connected to the driving device, and both are disposed within the housing. The driving device drives the lens assembly to move radially within the housing to achieve automatic focusing and shake correction.

[0020] Fourthly, this application also provides a terminal device, including the aforementioned camera module, which is disposed within the terminal device body to acquire image information.

[0021] By using the aforementioned camera module, the adhesive layer between the two lenses can be prevented from breaking due to deformation caused by high-temperature baking, thus avoiding misalignment of the two lenses. Furthermore, it effectively removes air gaps caused by the original lens design tolerances, preventing moisture buildup between the sealed lens components and ensuring optimal shooting results. Attached Figure Description Figure 1 This is a schematic diagram of a lens assembly provided in one embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of its decomposition; Figure 3 yes Figure 1 Another decomposition diagram; Figure 4 This is a cross-sectional view of a lens assembly provided in one embodiment of this application; Figure 5 This is a partial schematic diagram of the first axial groove and the second axial groove relative to each other, according to one embodiment of this application; Figure 6 This is a partial schematic diagram showing that the first axial groove and the second axial groove are staggered according to one embodiment of this application; Figure 7 This is a partial cross-sectional view of a first lens provided in one embodiment of this application; Figure 8 This is an exploded schematic diagram of a lens assembly with radial grooves provided in one embodiment of this application; Figure 9 This is a cross-sectional view of a lens assembly with radial grooves and a first axial groove provided in one embodiment of this application; Figure 10 This is a schematic diagram of a radial groove and a first axial groove being staggered according to one embodiment of this application; Figure 11 This is a partial schematic diagram of a radial groove and a first axial groove being staggered according to an embodiment of this application; Figure 12 This is another cross-sectional view of a lens assembly provided in one embodiment of this application; Figure 13 This is a partial cross-sectional view of a first lens provided in one embodiment of this application; Figure 14 This is a schematic diagram of a lens assembly provided in one embodiment of this application; Figure 15 This is a schematic diagram of a camera module provided in one embodiment of this application; Figure 16 This is a schematic diagram of a car structure provided in one embodiment of this application.

[0022] Figure Labels 1-Lens assembly; 10 - First lens; 20 - Second lens; 30 - Gap; O - Optical axis; 11-First optical part; 12-First edge part; 13-Circumferential groove; 21-Second optical part; 22-Second edge part; 23-Circumferential protrusion; 121-First bearing surface; 122-Matching surface; 123-First axial groove; 124-Radial groove; 125-Side wall; 126-Guide wall; 221-Second bearing surface; 222-Second axial groove; 1231 - First opening; 1232 - Third opening; 2221 - Second opening; 2222 - Fourth opening; 1241 - Fifth opening; 1251 - Guide slope; 1261 - First end; 1262 - Second end; 2 - Lens assembly; 201-Eye tube; 3-Camera module; 301 - Drive unit; 302 - Housing; 4-Terminal equipment; 41-Automobiles; 411 - Car body. Detailed Implementation

[0023] The embodiments of this application are described below with reference to the accompanying drawings.

[0024] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0025] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should be understood that the terms "first," "second," etc., used in this application are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0027] In the description of this application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] The lens assembly is one of the key components of the camera module. The lens assembly and the lens barrel together form a lens, which is installed inside the camera module to transmit the captured image information.

[0030] Two lens elements are joined together using adhesive to form a lens assembly. However, this bonding method has several drawbacks. Firstly, manufacturing tolerances can lead to air pockets at the bonding surfaces of the two lenses. During bonding, these air bubbles not only cause aesthetic defects but also degrade the lens assembly's performance, ultimately resulting in lens reliability failure. Secondly, after bonding, the lenses require high-temperature curing to accelerate adhesive drying. However, high temperatures can cause lens deformation, and the thin adhesive layer between the lenses makes them susceptible to breakage during high-temperature curing. This reduces the bond strength between the lenses, leading to lens reliability failure and significant losses for the company.

[0031] Firstly, the lens assembly 1 provided in this application embodiment is suitable for vehicle cameras, mobile phone cameras, and camera lenses, etc., and involves air venting between the two lenses and the bonding strength of the adhesive between the two lenses during use. Please refer to... Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of a lens assembly 1 provided in one embodiment of this application. Figure 2 yes Figure 1 A schematic diagram of an exploded view. Figure 3 yes Figure 1 Another exploded view. The lens assembly 1 includes a first lens 10 and a second lens 20, which are arranged sequentially along the extension direction of the optical axis O of the lens assembly 1, so that the first lens 10 and the second lens 20 can be combined along the optical axis O to form Figure 1The first lens 10 protrudes from the second lens 20 along the direction from the first lens 10 to the second lens 20, while the second lens 20 is recessed from the first lens 10 along the direction from the second lens 20 to the first lens 10. Specifically, the protrusion of the first lens 10 extends into the recess of the second lens 20, making the structures of the two lenses match, which is beneficial for the installation of the lens assembly 1. At the same time, the arrangement of the protrusion of the first lens 10 and the recess of the second lens 20 can meet the application scenarios of adhesive bonding and reduce aberrations. Furthermore, the gap between the first lens 10 and the second lens 20 is filled with adhesive, so that the first lens 10 and the second lens 20 are bonded together, thereby ensuring the stability of the relative positions of the first lens 10 and the second lens 20. In some embodiments, the first lens 10 and the second lens 20 can be made of plastic or glass and other lenses that can be bonded together with adhesive.

[0032] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 4 This is a cross-sectional view of a lens assembly 1 provided in one embodiment of this application. The lens assembly 1 further includes a first optical portion 11 and a first edge portion 12 surrounding the first optical portion 11. The second lens 20 includes a second optical portion 21 and a second edge portion 22 surrounding the second optical portion 21. The first optical portion 11 and the second optical portion 21 are used to receive and converge light to form a clear image. The first optical portion 11 and the second optical portion 21 are disposed opposite to each other to form a lens assembly 1 capable of achieving the imaging requirements of a lens. A gap 30 is provided between the first optical portion 11 and the second optical portion 21 to accommodate adhesive, so that the first lens 10 and the second lens 20 can be stably bonded together.

[0033] The first edge portion 12 includes a first bearing surface 121, which faces the second edge portion 22 along the optical axis O. The second edge portion 22 includes a second bearing surface 221, which is disposed opposite to the first bearing surface 121 to provide support for the first lens 10 and the second lens 20, thereby ensuring stability between the two lenses in the radial direction along the optical axis O. It is understood that the radial direction is perpendicular to the optical axis O. In some embodiments, the first bearing surface 121 and the second bearing surface 221 are parallel to improve the matching degree between the first bearing surface 121 and the second bearing surface 221, thereby improving the stability of the lens assembly 1. In some embodiments, both the first bearing surface 121 and the second bearing surface 221 are used to support the overall structure of the lens assembly 1 to ensure the stability of the lens assembly 1.

[0034] Please see Figure 2 and Figure 4The first bearing surface 121 is provided with a first axial groove 123, which is recessed inward along the direction of the optical axis O, so that the first axial groove 123 has space to accommodate adhesive, thereby increasing the amount of adhesive between the two lenses and increasing the bonding strength of the adhesive to the two lenses. It can be understood that the recessed direction of the first axial groove 123 is the direction from the second lens 20 to the first lens 10.

[0035] In some embodiments, the first axial groove 123 forms a first opening 1231 on the outer surface of the lens assembly 1. The first opening 1231 is used to connect the first axial groove 123 with the outside of the lens assembly 1. It is understood that the outer surface of the lens assembly 1 is the surface of the first edge portion 12 that is away from the first optical portion 11. The first axial groove 123 is connected to the gap 30, allowing the gap 30 between the first optical portion 11 and the second optical portion 21 to connect to the outside of the lens assembly 1 through the first axial groove 123, facilitating air circulation. During the injection of adhesive, the adhesive can disperse from the center of the first optical portion 11 outwards and flow into the first axial groove 123. The adhesive can replace the air in the gap 30 and drive the air out through the first opening 1231, ensuring the efficiency of air removal between the two lenses, thereby ensuring the imaging effect of the lens assembly 1. Furthermore, the first axial groove 123 increases the space for the adhesive. When the first axial groove 123 is filled with adhesive, the thickness of the adhesive layer between the two lenses increases, thereby enhancing the bonding strength of the two lenses. This prevents the two lenses from failing to bond due to the thin adhesive layer between them and the thermal expansion after high-temperature curing.

[0036] Please see Figure 3 and Figure 4 Based on this, the present application also provides a second axial groove 222 on the second bearing surface 221. The second axial groove 222 is recessed along the direction of the optical axis O, so that the second axial groove 222 has space to accommodate adhesive, thereby increasing the space for adhesive to be contained between the two lenses and thus increasing the adhesive strength of the adhesive to the two lenses. It can be understood that the recessed direction of the second axial groove 222 is the direction from the first lens 10 to the second lens 20.

[0037] In some embodiments, the second axial groove 222 forms a second opening 2221 on the outer surface of the lens assembly 1. The second opening 2221 connects the second axial groove 222 with the outside of the lens assembly 1, allowing air to flow between the second axial groove 222 and the outside of the lens assembly 1. The second axial groove 222 is also connected to the gap 30, allowing the gap 30 between the first optical part 11 and the second optical part 21 to connect to the outside of the lens assembly 1 through the second axial groove 222, facilitating air flow. During the injection of adhesive, the adhesive disperses from the center of the second optical part 21 outwards and flows into the second axial groove 222. The adhesive replaces the air in the gap 30 and forces the air out through the second opening 2221, ensuring efficient air removal between the two lenses and thus guaranteeing the imaging effect of the lens assembly 1. Furthermore, the second axial groove 222 increases the space for the adhesive. When the second axial groove 222 is filled with adhesive, the thickness between the two lenses increases, thereby enhancing the bonding strength of the two lenses. This prevents the bonding between the two lenses from failing due to the thin adhesive layer between them, which would cause the lenses to expand after high-temperature curing.

[0038] This application provides a first bearing surface 121 at the first edge 12 of the lens periphery and a second bearing surface 221 at the second edge 22 of the lens periphery. The first bearing surface 121 and the second bearing surface 221 are arranged opposite to each other to ensure radial stability between the two lenses. A first axial groove 123 and a second axial groove 222 are respectively provided on the first bearing surface 121 and the second bearing surface 221 to accommodate adhesive, thereby enhancing the bonding strength between the first lens 10 and the second lens 20. Both the first axial groove 123 and the second axial groove 222 communicate with the gap 30 between the first optical part 11 and the second optical part 21, allowing the gap 30 to connect to the outside of the lens assembly 1 via the first axial groove 123 and the second axial groove 222.

[0039] During the glue injection process, the glue disperses from the center of the lens outwards and flows into the first axial groove 123 and the second axial groove 222. This design facilitates airflow between the lens assemblies 1 and the outside of the lens assemblies 1. The flow of glue can replace air and drive air out of the first axial groove 123 to the outside of the lens assemblies 1, thereby ensuring the imaging effect of the lens assemblies 1. Moreover, the arrangement of the first axial groove 123 and the second axial groove 222 increases the glue's capacity, thereby enhancing the bonding strength between the two lenses.

[0040] Please see Figure 5 and Figure 6 , Figure 5This is a partial schematic diagram of the first axial groove 123 and the second axial groove 222 relative to each other, according to one embodiment of this application. Figure 6 This is a partial schematic diagram showing the staggered arrangement of the first axial groove 123 and the second axial groove 222 according to one embodiment of this application. In an optional embodiment, the positional relationship between the first axial groove 123 and the second axial groove 222 can be set according to actual conditions to ensure that the first lens 10 and the second lens 20 have sufficient bonding strength, avoiding bonding failure due to thermal expansion of the two lenses; and at the same time improving the venting effect between the first lens 10 and the second lens 20. Specifically, the first axial groove 123 and the second axial groove 222 can be arranged opposite each other along the optical axis O, or the first axial groove 123 and the second axial groove 222 can be staggered between the first bearing surface 121 and the second bearing surface 221 along the circumference of the lens assembly 1. The positional relationship between the first axial groove 123 and the second axial groove 222 will be described using the following two embodiments as examples.

[0041] Please see Figure 4 and Figure 5 In some embodiments, at least a portion of the first axial groove 123 and the second axial groove 222 are arranged opposite to each other along the optical axis O, such that at least a portion of the first axial groove 123 and the second axial groove 222 can be combined to form a space that can accommodate more adhesive, thereby increasing the thickness of the adhesive layer and thus increasing the bonding strength of the adhesive between the two lenses.

[0042] Specifically, both the first axial groove 123 and the second axial groove 222 have adhesive storage space along the optical axis O. When the adhesive fills the two grooves, the thickness of the adhesive layer increases, thereby increasing the bonding strength between the two lenses. The first axial groove 123 includes a third opening 1232, and the second axial groove includes a fourth opening 2222. At least a portion of the third opening 1232 and the fourth opening 2222 are arranged opposite to each other and are connected, so that the opposite portions of the two grooves combine to form a pit with a greater depth, thereby creating a space to accommodate more adhesive. When the adhesive fills the pit, the thickness of the adhesive layer between the two lenses increases, thereby enhancing the bonding strength between the two lenses. In some embodiments, the first opening 1231 and the second opening 2221 are arranged opposite to each other along the optical axis O and are connected, increasing the size of the opening connecting the lens assembly 1 to the outside, thereby accelerating the airflow rate and increasing the adhesive's efficiency in expelling air from the gap 30.

[0043] Please see Figure 4 and Figure 6In some embodiments, the first axial groove 123 and the second axial groove 222 are staggered along the circumferential direction of the lens assembly 1 between the first bearing surface 121 and the second bearing surface 221, such that the first axial groove 123 and the second axial groove 222 are dispersed at different positions between the first bearing surface 121 and the second bearing surface 221 in the circumferential direction of the lens assembly 1, thereby making the first axial groove 123 and the second axial groove 222 widely distributed between the first bearing surface 121 and the second bearing surface 221. Each position between the first bearing surface 121 and the second bearing surface 221 has a relatively thick adhesive layer to increase the bonding strength of the two lenses and ensure the stability of the lens assembly 1. Simultaneously, the staggered arrangement of the first axial groove 123 and the second axial groove 222 also increases the adhesive flow range within the gap 30, causing the adhesive in the gap to disperse into the first axial groove 123 and the second axial groove 222 respectively, thereby increasing the adhesive venting range and improving the imaging effect of the lens assembly 1. Understandably, when the first axial groove 123 and the second axial groove 222 are staggered between the first bearing surface 121 and the second bearing surface 221 along the circumferential direction of the lens assembly 1, the first axial groove 123 and the second axial groove 222 can be directly connected, or they can be connected to the gap 30 through both axial grooves. Please see Figure 7 , Figure 7 This is a partial cross-sectional view of the first lens 10 provided in one embodiment of this application. In an optional embodiment, the depth H1 of the first axial groove 123 is greater than or equal to 0.03 mm and less than or equal to 0.05 mm, so as to ensure the venting effect and bonding strength between the two lenses, while avoiding the two grooves being too deep, which would make the lenses difficult to demold. It is understood that the depth of the second axial groove 222 is greater than or equal to 0.03 mm and less than or equal to 0.05 mm.

[0044] Please see Figure 8 and Figure 9 , Figure 8 This is an exploded schematic diagram of a lens assembly 1 with radial grooves 124 provided in one embodiment of this application. Figure 9This is a cross-sectional view of a lens assembly 1 with a radial groove 124 and a first axial groove 123 provided in one embodiment of this application. In an optional embodiment, the first edge portion 12 is provided with a circumferential groove 13, and the second edge portion 22 is provided with a circumferential protrusion 23. Along the optical axis O, the circumferential protrusion 23 is used to insert into the circumferential groove 13 to ensure the stability of the first lens 10 and the second lens 20 and to prevent them from shifting laterally and affecting the imaging effect. Along the radial direction of the optical axis O, at least one sidewall away from the first optical part 11 is provided with a radial groove 124. The radial groove 124 is recessed in the radial direction of the optical axis O so that the radial groove 124 has a certain space to accommodate the glue in the gap 30, increasing the thickness of the glue layer and thus enhancing the bonding strength between the two lenses. The gap 30, the radial groove 124, and the first axial groove 123 are connected in sequence, so that the gap 30 can be connected to the first opening 1231 in sequence through the radial groove 124 and the first axial groove 123 to facilitate the flow of air. This allows the glue to flow from the gap through the radial groove 124 into the first axial groove 123, and forces air to flow from the gap 30 into the first axial groove 123 for discharge.

[0045] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 8 and Figure 9 A circumferential groove 13 is disposed around the first optical part 11, and a circumferential protrusion 23 is disposed around the second optical part 21. The circumferential protrusion 23 can extend into the circumferential groove 13, thereby restricting the position of the first lens 10 and the second lens 20 and preventing the first lens 10 and the second lens 20 from being laterally offset relative to the first lens 10. In some embodiments, the fifth opening 1241 of the radial groove 124 is oriented in the radial direction of the optical axis O, so that adhesive can flow directly into the radial groove 124 from the gap 30.

[0046] In one embodiment, one inner wall of the circumferential groove 13 is provided as a mating surface 122. Along the radial direction of the optical axis O, the mating surface 122 is located on the side of the circumferential groove 13 closest to the first bearing surface 121. The mating surface 122 and the first bearing surface 121 are connected at an angle, used to limit the relative position of the first lens 10 and the second lens 20 to ensure the stability of the lens assembly 1. A radial groove 124 is provided on the mating surface 122. The radial groove 124 is recessed in the radial direction of the optical axis O, so that the radial groove 124 has a certain space to accommodate the adhesive in the gap 30, increasing the thickness of the adhesive layer and thus enhancing the bonding strength between the two lenses. It can be understood that, along the radial direction of the optical axis O, the radial groove 124 can also be provided on one outer wall of the circumferential protrusion 23 near the mating surface 122. This radial groove 124 is recessed in the radial direction of the optical axis to increase the space for accommodating the adhesive between the two lenses, thereby enhancing the bonding strength between the two lenses. It is understandable that the radial groove 124 can be provided on the inner wall of the circumferential groove 13, or on the outer wall of the circumferential protrusion 23. Alternatively, radial grooves can be provided on both the inner wall of the circumferential groove 13 and the outer wall of the circumferential protrusion 23 to improve the exhaust efficiency of the lens assembly 1 and increase the bonding strength between the two lenses.

[0047] In some embodiments, the third opening 1232 of the first axial groove 123 is disposed opposite to the second edge portion 22. In the radial direction, one side of the third opening 1232 is close to the outside of the lens assembly 1, and the other side is close to the mating surface 122, thereby enabling the first axial groove 123 to communicate with both the outside of the lens assembly 1 and the radial groove 124. It is understood that the opening direction of the third opening 1232 extends along the optical axis O. During the injection of adhesive, the adhesive disperses from the center of the first optical part 11 outwards and flows into the radial groove 124, then is guided through the radial groove 124 to the first axial groove 123, filling both the radial groove 124 and the first axial groove 123. The adhesive can replace the air between the two lenses, allowing the adhesive to drive air out from the outside, ensuring the venting effect between the two lenses, and thus ensuring the imaging effect of the lens assembly 1. Furthermore, the radial groove 124 increases the space for adhesive, thereby enhancing the bonding strength of the two lenses and preventing the bonding failure of the two lenses due to the thin adhesive layer between them and the thermal expansion after high-temperature curing.

[0048] Meanwhile, by setting a radial groove 124 between the circumferential groove 13 and the circumferential protrusion 23, the flow space of the glue at the mating surface 122 from the gap 30 into the first axial groove 123 is increased, which avoids the space between the first lens 10 and the second lens 20 at the mating surface 122 being too small and thus hindering the flow of glue, thereby improving the air venting efficiency between the two lenses.

[0049] Please see Figure 8 In some optional embodiments, the number of first axial grooves 123 and radial grooves 124 are each at least two, and the at least two first axial grooves 123 are evenly spaced along the circumference of the first edge portion 12. The at least two radial grooves 124 are also evenly spaced along the circumference of the lens assembly 1 between the circumferential protrusion 23 and the circumferential groove 13, so that the lens assembly 1 is subjected to uniform force around its periphery. This avoids uneven distribution of the first axial grooves 123 or radial grooves 124, which could lead to localized stress concentration and breakage of the bonding surface between the two lenses, thereby improving the bonding strength of the lens assembly 1 and ensuring its stability.

[0050] Specifically, multiple first axial grooves 123 or multiple radial grooves 124 form uniformly distributed bonding points between the two lenses. The adhesive thickness at these bonding points is consistent, ensuring uniform stress distribution around the lens assembly 1. This avoids localized stress concentration caused by uneven distribution of the first axial grooves 123 or radial grooves 124, improving the bonding strength of the lens assembly 1 and thus ensuring its stability. Furthermore, the multiple first axial grooves 123 and radial grooves 124 evenly distributed circumferentially along the lens assembly 1 provide multiple flow paths for the adhesive, allowing it to diffuse evenly between the two lenses and ensuring more thorough air removal. Conversely, if the multiple first axial grooves 123 and radial grooves 124 are unevenly distributed circumferentially along the lens assembly 1, the adhesive will preferentially flow to areas with lower resistance, resulting in insufficient adhesive filling in other areas and the formation of air bubbles.

[0051] In some embodiments, at least two first axial grooves 123 are provided, spaced apart along the circumference of the first edge portion 12, so that each of the at least two first axial grooves 123 can accommodate a large amount of adhesive. Specifically, multiple first axial grooves 123 are distributed around the first lens 10, and the grooves are filled with adhesive, so that the first lens 10 has a thick adhesive layer around its perimeter, thereby improving the bonding strength of the lens assembly 1 and preventing single-point or local bonding failure that could cause the lens assembly 1 to loosen. Furthermore, each first axial groove 123 is provided with a first opening 1231, and the first axial groove 123 is also connected to the gap 30, so that the multiple first axial grooves 123 can provide more air discharge paths, allowing the air at various positions within the gap 30 to be replaced by adhesive, increasing the efficiency of adhesive in discharging air between the two lenses, and improving the imaging effect of the lens assembly 1.

[0052] In some embodiments, the number of radial grooves 124 can also be set to at least two. At least two radial grooves 124 are spaced apart between the circumferential protrusion 23 and the circumferential groove 13 along the circumferential direction of the lens assembly 1, so that both radial grooves 124 can accommodate a large amount of adhesive. Specifically, multiple radial grooves 124 are distributed along the radial direction of the optical axis O around the circumferential protrusion 23 and the circumferential groove 13 away from the first optical part 11, and the grooves are filled with adhesive. This results in a thicker adhesive layer around the circumferential protrusion 23 and the circumferential groove 13 away from the first optical part 11 along the radial direction of the optical axis O, thereby improving the bonding strength of the lens assembly 1. Furthermore, the multiple radial grooves 124 can guide adhesive from the gap 30 into the multiple first axial grooves 123 from multiple directions, accelerating the air expulsion speed between the two lenses and making the air expulsion between the two lenses more thorough, thereby improving the imaging effect of the lens assembly 1.

[0053] Understandably, the number of first axial grooves 123 and radial grooves 124 can be set according to actual conditions to ensure the bonding strength of the two lenses and the venting effect inside the lens assembly 1. At the same time, it avoids excessive slotting inside the lens assembly 1, which could lead to instability in the overall structure of the lens assembly 1. For example, there are three first axial grooves 123 and three radial grooves 124. The three first axial grooves 123 are evenly distributed circumferentially along the first edge portion 12, and the three radial grooves 124 are evenly distributed circumferentially between the circumferential grooves 13 and the circumferential protrusions 23 along the lens assembly 1.

[0054] In some embodiments, please refer to Figure 3 The number of second axial grooves 222 is at least two. The at least two second axial grooves 222 are evenly spaced along the circumference of the second edge portion 22 so that the force around the lens assembly 1 is uniform. This avoids the uneven distribution of the second axial grooves 222, which would cause local stress concentration and lead to the breakage of the bonding surface of the two lenses. This improves the bonding strength of the lens assembly 1 and thus ensures the stability of the lens assembly 1.

[0055] Please see Figure 8 , Figure 10 and Figure 11 , Figure 10 This is a schematic diagram showing that the radial groove 124 and the first axial groove 123 are staggered according to one embodiment of this application. Figure 11This is a partial schematic diagram showing the radial groove 124 and the first axial groove 123 being staggered according to one embodiment of this application. The arrangement of the first axial groove 123 and the radial groove 124 can be set according to actual conditions so that both the first axial groove 123 and the radial groove 124 can achieve the discharge of air between the two lenses by the adhesive, and the filling of the first axial groove 123 and the radial groove 124 by the adhesive. Specifically, it includes the following two embodiments: Please see Figure 8 In one optional embodiment, along the optical axis O, the first axial groove 123 and the radial groove 124 at least partially overlap circumferentially along the first edge portion 12, so that adhesive can flow directly from the radial groove 124 into the first axial groove 123, and drive the air between the two lenses to be discharged from the outside of the lens assembly 1, thereby improving the venting efficiency of the lens assembly 1. Exemplarily, the first axial groove 123 and the radial groove 124 are arranged to overlap circumferentially along the first edge portion 12 to shorten the flow path of the adhesive and facilitate the discharge of air within the gap 30 from the first opening 1231.

[0056] Please see Figure 10 and Figure 11 In another optional embodiment, along the circumference of the lens assembly 1, the first axial groove 123 and the radial groove 124 are staggered between the circumferential groove 13 and the circumferential protrusion 23, such that the first axial groove 123 and the radial groove 124 are distributed at different positions between the circumferential groove 13 and the circumferential protrusion 23 along the circumference of the lens assembly 1. A thicker adhesive layer is provided at different positions between the first edge portion 12 and the second edge portion in the circumferential direction of the lens assembly 1 to increase the bonding strength of the two lenses and ensure the stability of the lens assembly 1.

[0057] In some embodiments, please refer to Figure 12 , Figure 12 This is another cross-sectional view of the lens assembly 1 provided in one embodiment of this application. The first axial groove 123 and the second axial groove 222 are disposed opposite to each other, and both are connected to the radial groove 124. This allows adhesive to flow into the first axial groove 123 and the second axial groove 222 through the radial groove 124, filling the first axial groove 123 and the second axial groove 222, ensuring the thickness of the adhesive in the two grooves, and thus increasing the adhesive strength to the lens assembly 1. Furthermore, the adhesive can flow directly into the two axial grooves through the radial groove 124, and air is discharged through the first opening 1231 and the second opening 2221, improving the air venting efficiency of the adhesive to the lens assembly 1.

[0058] Please see Figure 11In some embodiments, the sidewall 125 of the radial groove 124 includes a guide slope 1251. In the radial direction, the guide slope 1251 has two opposing ends. One end of the guide slope 1251 is located on the side of the guide slope 1251 closest to the first bearing surface 121, and the other end of the guide slope 1251 is located on the side of the guide slope 1251 closest to the first optical part 11. In the radial direction, the end of the guide slope 1251 closest to the first optical part 11 is inclined away from the bottom wall of the radial groove 124. In some embodiments, the included angle α between the guide slope 1251 and the bottom wall of the radial groove 124 is greater than 90° and less than 180°. By providing the guide slope 1251, the adhesive in the gap 30 is guided to flow into the radial groove 124, accelerating the venting efficiency of the adhesive and ensuring the imaging effect of the lens assembly 1.

[0059] Please see Figure 4 , Figure 9 , Figure 12 and Figure 13 , Figure 13 This is a partial cross-sectional view of a first lens 10 provided in one embodiment of this application. In some embodiments, at least one inner wall of the circumferential groove 13 is a guide wall 126. The guide wall 126 includes a first end 1261 and a second end 1262 in the optical axis O direction. The first end 1261 is the end of the guide wall 126 of the circumferential groove 13 near the first axial groove 123, and the second end 1262 is the other end of the guide wall 126 of the circumferential groove 13 away from the first axial groove 123. Along the radial direction of the optical axis, the distance L1 between the first end 1261 and the optical axis O is greater than the distance L2 between the second end 1262 and the optical axis O, so that the guide wall 126 of the circumferential groove 13 forms an arc surface inclined towards the first bearing surface 121, thereby reducing the difficulty of the lens assembly 1 molding process and facilitating the demolding of the lens. In one embodiment, the distance L1 between the first end 1261 and the optical axis O is smaller than the distance L2 between the second end 1262 and the optical axis O, so as to increase the adhesive space of the circumferential groove 13, thereby increasing the bonding strength of the two lenses when the adhesive fills the circumferential groove 13.

[0060] Secondly, this application provides a lens assembly 2, please refer to... Figure 14 , Figure 14 This is a schematic diagram of a lens assembly 2 provided in one embodiment of this application. The lens assembly 2 includes a lens barrel 201 and the aforementioned lens assembly 1. A portion of the lens assembly 1 is disposed within the lens barrel 201 and abuts against the inner wall of the lens barrel 201 to ensure the stability of the lens assembly 2 structure.

[0061] Thirdly, this application provides a camera module 3, please refer to... Figure 15 , Figure 15This is a schematic diagram of a camera module 3 provided in one embodiment of this application. The camera module 3 includes the lens assembly 2, the driving device 301, and the housing 302 described above. The lens assembly 2 is connected to the driving device 301, and both the lens assembly 2 and the driving device 301 are disposed within the housing 302. The driving device 301 is used to drive the lens assembly 2 to move within the housing 302 to achieve automatic focusing and shake correction.

[0062] Fourthly, this application also provides a terminal device 4, please refer to... Figure 16 , Figure 16 This is a schematic diagram of a vehicle 41 provided in one embodiment of this application. The terminal device 4 includes the aforementioned camera module 3 and a terminal device body. The camera module 3 is disposed within the terminal device 4 body to acquire image information. It is understood that the terminal device 4 can be any device with image acquisition capabilities. For example, the terminal device 4 can be a smartphone, tablet computer, camera, vehicle 41, etc.

[0063] Please see Figure 16 In some embodiments, the terminal device 4 is a vehicle 41, including a vehicle body 411 and a camera module 3 as described in the third aspect above. The camera module 3 is disposed within the vehicle body 411 and is used to acquire image information. It is understood that the structure of the terminal device 4 described above does not constitute a limitation on this embodiment. The terminal device 4 may include more or fewer components than described above, or different component arrangements.

[0064] By using the camera module 3 composed of the aforementioned lens assembly 1, it is possible to prevent the adhesive layer between the two lenses from breaking due to deformation caused by high-temperature baking of the lens assembly 1 in the camera module 3, which would lead to the misalignment of the two lenses. Furthermore, it is possible to effectively expel air present in the gap 30 caused by the original lens design tolerances, preventing moisture from forming between the sealed lens assemblies 1, thus ensuring the quality of the shooting process.

[0065] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lens assembly, characterized in that, include: A first lens and a second lens, wherein the first lens and the second lens are arranged sequentially along the optical axis of the lens assembly; The first lens includes a first optical portion and a first edge portion surrounding the first optical portion, and the second lens includes a second optical portion and a second edge portion surrounding the second optical portion. The first optical portion and the second optical portion are disposed opposite to each other and have a gap between them, the gap being used to fill adhesive. The first edge portion includes a first bearing surface, which faces the second edge portion; the second edge portion includes a second bearing surface, and the first bearing surface and the second bearing surface are disposed opposite to each other. The first bearing surface is provided with a first axial groove, and the second bearing surface is provided with a second axial groove. Both the first axial groove and the second axial groove are connected to the gap.

2. The lens assembly according to claim 1, characterized in that, Along the optical axis, at least a portion of the first axial groove and the second axial groove are opposite each other; or, along the circumferential direction of the lens assembly, the first axial groove and the second axial groove are staggered between the first bearing surface and the second bearing surface.

3. The lens assembly according to claim 1, characterized in that, The depth of the first axial groove along the optical axis is in the range of 0.03mm-0.05mm; or, the depth of the second axial groove along the optical axis is in the range of 0.03mm-0.05mm.

4. The lens assembly according to claim 1, characterized in that, The first edge portion is provided with a circumferential groove, and the second edge portion is provided with a circumferential protrusion. Along the optical axis direction, the circumferential protrusion is used to insert into the circumferential groove. Along the radial direction of the optical axis, at least one sidewall away from the first optical part is provided with a radial groove between the circumferential groove and the circumferential protrusion. The radial groove is concave in the radial direction of the optical axis. The gap, the radial groove and the first axial groove are connected in sequence.

5. The lens assembly according to claim 4, characterized in that, The number of the first axial groove and the number of the radial groove are at least two. The at least two first axial grooves are evenly spaced along the circumference of the first edge portion, and the at least two radial grooves are evenly spaced between the circumferential protrusion and the circumferential groove along the circumferential direction of the lens assembly.

6. The lens assembly according to claim 4, characterized in that, Along the optical axis, the first axial groove and the radial groove at least partially overlap circumferentially along the first edge portion; or, the first axial groove and the radial groove are staggered between the circumferential groove and the circumferential protrusion along the circumferential direction of the lens assembly.

7. The lens assembly according to claim 4, characterized in that, The radial groove sidewall includes a guide slope. In the direction perpendicular to the optical axis, the guide slope is inclined in the direction away from the bottom wall of the radial groove. The guide slope is connected between the bottom wall of the radial groove and the sidewall of the circumferential groove, and is used to guide the glue in the gap into the radial groove.

8. A lens assembly, characterized in that, Includes a lens assembly and a lens barrel as described in any one of claims 1-7, wherein a portion of the lens assembly is located within the lens barrel and abuts against the inner wall of the lens barrel.

9. A camera module, characterized in that, The device includes the lens assembly, driving device, and housing as described in claim 8, wherein the lens assembly is connected to the driving device, the lens assembly and the driving device are located within the housing, and the driving device is used to drive the lens assembly to move radially along the optical axis.

10. A terminal device, characterized in that, The device includes the camera module and the terminal device body as described in claim 9, wherein the camera module is disposed within the terminal device body to acquire image information.

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