A lens assembly

Abstract

This utility model discloses a lens assembly, including: a lens barrel for carrying an optical lens; an upper shell having a support surface and a stepped portion, the support surface supporting the lens barrel; the stepped portion including a first stepped portion and a second stepped portion, the first stepped portion being connected to the support surface and extending along the axial direction of the lens barrel, such that the first stepped portion surrounds the outer periphery of the lens barrel, defining a gap between the first stepped portion and the lens barrel; the second stepped portion being connected to the side of the first stepped portion opposite to the support surface and extending along the axial direction of the lens barrel, such that the second stepped portion surrounds the outer periphery of the lens barrel, defining a solder groove between the second stepped portion, the first stepped portion and the lens barrel, the solder groove for accommodating solder, the solder groove communicating with the gap, so that the molten and solidified solder fills the gap to seal the lens barrel and the upper shell, thereby improving the connection reliability between the lens barrel and the upper shell.

Description

Technical Field

[0001] This utility model relates to the field of camera modules, and more particularly to a lens assembly. Background Technology

[0002] With the accelerating pace of automotive intelligence, in-vehicle camera modules, as core sensors for advanced driver assistance systems and autonomous driving, are finding increasingly widespread application and their technology is maturing. To meet the demands for higher-resolution imaging, the pixel count of in-vehicle camera modules is constantly increasing, leading to a significant increase in power consumption and heat generation. The use of metal casings for in-vehicle camera modules has become a mainstream industry trend due to their superior heat dissipation performance, effectively ensuring the stable operation of core electronic components. Simultaneously, to cope with the stringent requirements for image quality imposed by the complex and ever-changing driving environment's temperature, and to ensure the stability of optical performance, the use of metal materials for the lens barrels of in-vehicle camera modules has also become an inevitable choice.

[0003] In related technologies, the lens barrel flange and the upper shell are sealed and connected by adhesive bonding. However, under continuous vibration or impact from the vehicle, the adhesive layer is prone to failure and loosening, leading to lens barrel displacement or damage, which poses a risk of low reliability. The lens barrel and the upper shell are sealed and connected by nuts and sealing rings. Although the connection is relatively strong, it requires additional nuts and sealing rings, resulting in higher material costs and complex assembly processes. While adopting an integrated structure for the lens barrel and the upper shell can solve the connection and some heat dissipation problems, it limits the versatility and replaceability of the lens barrel, which is not conducive to product iteration. Utility Model Content

[0004] One objective of this invention is to provide a lens assembly that reliably connects the lens barrel and the upper housing, reduces the assembly steps of the lens assembly, and improves the iterability of the lens assembly.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a lens assembly, comprising: a lens barrel for supporting an optical lens; an upper shell having a support surface and a stepped portion, the support surface supporting the lens barrel; the stepped portion comprising a first stepped portion and a second stepped portion, the first stepped portion being connected to the support surface and extending axially along the lens barrel, such that the first stepped portion surrounds the outer periphery of the lens barrel, defining a gap between the first stepped portion and the lens barrel; the second stepped portion being connected to the side of the first stepped portion opposite to the support surface and extending axially along the lens barrel, such that the second stepped portion surrounds the outer periphery of the lens barrel, defining a solder groove between the second stepped portion, the first stepped portion, and the lens barrel, the solder groove accommodating solder, the solder groove communicating with the gap, such that the molten and solidified solder fills the gap to seal and connect the lens barrel and the upper shell.

[0006] As a preferred embodiment, the upper shell further includes a positioning part connected to the stepped portion. The positioning part has a positioning hole. When the lens barrel is placed on the supporting surface of the upper shell, at least a portion of the lens barrel extends into the positioning hole, and the positioning part can radially position the lens barrel.

[0007] As a preferred embodiment, the bearing surface is formed on one side surface of the positioning part perpendicular to the axial direction of the lens barrel to support the lens barrel.

[0008] As a preferred embodiment, the first stepped portion has a guide surface on the side facing the lens barrel, and the guide surface is inclined to allow the solder groove and the gap to transition and connect.

[0009] As a preferred embodiment, the lens barrel includes a connected main body and a mounting portion, the main body being able to carry an optical lens; the mounting portion extends radially from the outer peripheral surface of the main body, and the mounting portion abuts against the bearing surface, so that the lens barrel is supported on the upper shell.

[0010] As a preferred embodiment, the mounting portion includes a first mounting portion and a second mounting portion. The first mounting portion extends radially from the outer peripheral surface of the main body, and the second mounting portion extends radially from the outer peripheral surface of the first mounting portion. When the lens barrel is placed on the bearing surface of the upper shell, the first mounting portion and the second stepped portion are arranged radially opposite to each other to define the solder groove between the first mounting portion and the second stepped portion. The second mounting portion and the first stepped portion are arranged radially opposite to each other to define the gap between the second mounting portion and the first stepped portion.

[0011] As a preferred embodiment, the second mounting portion has a guide surface on the side facing the first step portion, and the guide surface is inclined to transition between the solder groove and the gap.

[0012] As a preferred embodiment, the mounting portion has an expansion groove on the side opposite to the first step portion, and / or the first step portion has an expansion groove on the side opposite to the mounting portion, the expansion groove communicating with the gap.

[0013] As a preferred embodiment, both the lens barrel and the upper shell are made of metal.

[0014] As a preferred embodiment, the lens assembly further includes a circuit board connected to the lens barrel and located on the light-emitting side of the lens barrel.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) The lens barrel and the upper shell are sealed by welding, which improves the reliability of the connection between the lens barrel and the upper shell.

[0017] (2) The lens barrel can be used with different upper shells, which is conducive to improving the iterability of the lens assembly.

[0018] (3) A solder groove is formed between the stepped part of the lens barrel and the upper shell to facilitate the placement of solder. After the solder melts and solidifies, it seals and connects the lens barrel and the upper shell, thereby reducing the assembly process of the lens assembly and facilitating the automated assembly of the lens barrel and the upper shell. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a lens assembly according to some embodiments of the present application with solder placed in a solder bath.

[0020] Figure 2 This is a schematic diagram of a lens assembly in a solder molten and solidified state according to some embodiments of this application.

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0022] Figure 4 This is an enlarged view of the weld joint of the lens assembly according to some other embodiments of this application.

[0023] Figure 5 This is an enlarged view of the weld joint of the lens assembly according to some other embodiments of this application.

[0024] Figure 6 This is a schematic diagram of a lens assembly in a solder molten and solidified state according to some other embodiments of this application.

[0025] Figure 7 This is a schematic diagram of a lens assembly in a solder molten and solidified state according to some other embodiments of this application.

[0026] In the diagram: 1. Lens assembly; 10. Lens barrel; 11. Main body; 12. Mounting part; 121. First mounting part; 122. Second mounting part; 1221. Guide surface; 1222. Expansion groove; 20. Upper shell; 21. Positioning part; 211. Positioning hole; 212. Supporting surface; 22. Stepped part; 221. First stepped part; 2212. Guide surface; 222. Second stepped part; 23. Extension part; 30. Solder groove; 40. Gap; 50. Circuit board; 60. Photosensitive chip; 70. Solder. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. They should not be construed as limiting the specific protection scope of this utility model.

[0029] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection, a contact connection, or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] A lens assembly 1, such as Figures 1-7 As shown, the system includes: a lens barrel 10 and an upper shell 20, the lens barrel 10 supporting an optical lens; the upper shell 20 having a bearing surface 212 and a stepped portion 22, the bearing surface 212 supporting the lens barrel 10; the stepped portion 22 including a first stepped portion 221 and a second stepped portion 222, the first stepped portion 221 being connected to the bearing surface 212 and extending along the axial direction of the lens barrel 10, such that the first stepped portion 221 surrounds the outer periphery of the lens barrel 10, defining a gap 40 between the first stepped portion 221 and the lens barrel 10. The second step portion 222 is connected to the side of the first step portion 221 away from the bearing surface 212 and extends along the axial direction of the lens barrel 10, so that the second step portion 222 surrounds the outer periphery of the lens barrel 10, defining the solder groove 30 between the second step portion 222, the first step portion 221 and the lens barrel 10. The solder groove 30 can accommodate the solder 70 and communicates with the gap 40, so that the molten and solidified solder 70 fills the gap 40 to seal and connect the lens barrel 10 and the upper shell 20.

[0032] This should be understandable, such as Figure 1 As shown, the width of the gap 40 is less than the width of the solder groove 30. That is, the radial distance between the lens barrel 10 and the first step portion 221 is less than the radial distance between the lens barrel 10 and the second step portion 222, thereby forming the solder groove 30 between the second step portion 222, the first step portion 221, and the lens barrel 10. Figure 1 As shown, before the welding operation, the solder 70 can be placed on the first step portion 221, and the solder 70 is held between the second step portion 222 and the lens barrel 10. Further, as... Figure 2 and Figure 3 As shown, the solder 70 is molten during the welding operation. A portion of the molten and solidified solder 70 flows into the gap 40 to fill it, while the other portion of the molten and solidified solder 70 remains in the solder bath 30, thereby sealing the connection between the lens barrel 10 and the upper shell 20. It is worth mentioning that the bearing surface 212 acts as a catcher for the molten solder 70, which helps prevent the solder 70 from flowing down and causing contamination or damage to other components.

[0033] It is understandable that the larger radial distance between the lens barrel 10 and the second step portion 222 facilitates the easier insertion of the solder 70, thereby reducing the difficulty of filling the solder 70 and improving the welding efficiency between the lens barrel 10 and the upper shell 20. The smaller radial distance between the lens barrel 10 and the first step portion 221 reduces the amount of solder 70 required to fill the gap 40, thus lowering material costs.

[0034] Compared to adhesive bonding, this embodiment uses welding to seal the lens barrel 10 and the upper shell 20, improving connection reliability and reducing the risk of displacement or loosening of the lens barrel 10 relative to the upper shell 20 under continuous vehicle vibration or collision impact. Compared to the method of locking with a nut and adding a sealing ring, this embodiment uses a solder groove 30 to place solder 70, achieving a sealed connection between the lens barrel 10 and the upper shell 20 through welding. This not only reduces the types of parts and assembly steps but also facilitates automated assembly of the lens barrel 10 and the upper shell 20, further reducing the production cost of the lens assembly 1. Compared to a one-piece structure of the lens barrel 10 and the upper shell 20, in this embodiment, the lens barrel 10 and the upper shell 20 can be designed, modified, or iterated separately, and then assembled by welding. This allows the same lens barrel 10 to be adapted to different upper shells 20, or the same upper shell 20 to be matched with different lens barrels 10, improving the iterability of the lens assembly 1, shortening development time, and reducing development costs.

[0035] It is worth mentioning that the solder 70 can be placed in a complete circle in the solder bath 30, or it can be placed in segments in the solder bath 30; the surface of the solder 70 after melting and solidification can be raised, recessed, or flat; this application does not impose specific limitations in this regard. The welding method includes, but is not limited to, radiant heating, convection heating, magnetic induction heating, and laser heating; this application does not impose specific limitations on the composition of the solder 70 or the welding method. Furthermore, the solder 70 can be in strip form or granular form, as shown in... Figure 1 The solder 70 is placed on the first step 221 as shown; the solder 70 may also be in powder or paste form, and some of the solder 70 is already in the gap 40 before the soldering operation; this application does not make specific limitations in this regard.

[0036] In some embodiments, such as Figures 3-5 As shown, the upper shell 20 also includes a positioning part 21 connected to the stepped portion 22. The positioning part 21 has a positioning hole 211. When the lens barrel 10 is placed on the bearing surface 212 of the upper shell 20, at least a portion of the lens barrel 10 extends into the positioning hole 211, and the positioning part 21 can radially position the lens barrel 10. That is, by the bearing surface 212 abutting against the lens barrel 10, the lens barrel 10 can be positioned along the axial direction of the lens barrel 10. By the positioning part 21 cooperating with the lens barrel 10, the lens barrel 10 can be positioned in a direction perpendicular to the axial direction of the lens barrel 10. This helps to avoid displacement of the lens barrel 10 relative to the upper shell 20 during the welding process, thereby reducing installation errors and improving the positional accuracy of the lens barrel 10 and the upper shell 20 during installation.

[0037] In some embodiments, such as Figures 3-5 As shown, a bearing surface 212 is formed on one side of the positioning part 21 perpendicular to the axial direction of the lens barrel 10 to support the lens barrel 10. That is, a positioning hole 211 is formed around the side of the positioning part 21 facing the lens barrel 10 and parallel to the axial direction of the lens barrel 10; the bearing surface 212 is formed on the surface of the positioning part 21 perpendicular to the axial direction of the lens barrel 10; the stepped part 22 connects to the positioning part 21 and is located on the same side of the positioning part 21 as the bearing surface 212; this makes the structure of the upper shell 20 more compact and helps to reduce the overall size of the lens assembly 1.

[0038] In some embodiments, such as Figures 3-5As shown, the first step portion 221 has a guide surface 2212 on the side facing the lens barrel 10. The guide surface 2212 is inclined to transition between the solder bath 30 and the gap 40. That is, from the end near the second step portion 222 to the end near the bearing surface 212, the radial distance between the guide surface 2212 and the lens barrel 10 gradually decreases, thereby transitioning between the solder bath 30 and the gap 40. It should be understood that a funnel-like structure is formed between the guide surface 2212 and the lens barrel 10 to guide the molten solder 70, allowing the molten solder 70 to flow more smoothly into the gap 40.

[0039] It is worth mentioning that by setting the guide surface 2212, it is also beneficial to avoid structural abrupt changes in the solder 70 after melting and solidification at the connection between the solder tank 30 and the gap 40, thereby reducing the stress concentration caused by structural changes in the solder 70 after melting and solidification, and thus improving the structural strength and welding reliability of the weld between the lens barrel 10 and the upper shell 20.

[0040] In some embodiments, such as Figures 1-7 As shown, the lens barrel 10 includes a connected main body 11 and a mounting portion 12. The main body 11 carries an optical lens; the mounting portion 12 extends radially from the outer peripheral surface of the main body 11 and abuts against a bearing surface 212, so that the lens barrel 10 is supported on the upper shell 20. In at least one embodiment, as Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, at least a portion of the main body 11 extends into the positioning hole 211, thereby cooperating with the positioning part 21 of the upper shell 20 to radially position the lens barrel 10.

[0041] In some embodiments, such as Figure 4 and Figure 5 As shown, the mounting portion 12 includes a first mounting portion 121 and a second mounting portion 122. The first mounting portion 121 extends radially from the outer peripheral surface of the main body portion 11, and the second mounting portion 122 extends radially from the outer peripheral surface of the first mounting portion 121. That is, the first mounting portion 121 and the second mounting portion 122 have a stepped structure. Specifically, when the lens barrel 10 is placed on the bearing surface 212 of the upper shell 20, the first mounting portion 121 and the second stepped portion 222 are arranged radially opposite to each other to define the solder groove 30 between the first mounting portion 121 and the second stepped portion 222. The second mounting portion 122 and the first stepped portion 221 are arranged radially opposite to each other to define the gap 40 between the second mounting portion 122 and the first stepped portion 221. That is, the radial distance between the second mounting portion 122 and the first stepped portion 221 is smaller than the radial distance between the first mounting portion 121 and the second stepped portion 222.

[0042] It should be understood that before the welding operation, the solder 70 can be placed on the second mounting portion 122 and the first step portion 221, and the solder 70 can be held between the first mounting portion 121 and the second step portion 222. Further, as... Figure 4 As shown, the solder 70 is melted by welding. A portion of the melted and solidified solder 70 flows into the gap 40 to fill the gap 40, while the other portion of the melted and solidified solder 70 is located in the solder tank 30, thereby sealing the connection between the lens barrel 10 and the upper shell 20.

[0043] In some embodiments, such as Figure 4 and Figure 5 As shown, the second mounting portion 122 has a guide surface 1221 on the side facing the first stepped portion 221. The guide surface 1221 is inclined to transition between the solder trough 30 and the gap 40. That is, the radial distance between the guide surface 1221 and the first stepped portion 221 gradually decreases from the end near the first mounting portion 121 to the end away from the first mounting portion 121, thereby transitioning between the solder trough 30 and the gap 40. It should be understood that the guide surface 1221 and the guide surface 2212 of the first stepped portion 221 are arranged radially opposite to each other to form a funnel-like structure, which guides the molten solder 70, allowing the molten solder 70 to flow more smoothly into the gap 40.

[0044] It is worth mentioning that by arranging the second mounting portion 122 and the first step portion 221 radially opposite each other, the first mounting portion 121 and the second step portion 222 radially opposite each other, and the guide surface 1221 and the guide surface 2212 radially opposite each other, the cross-section of the molten and solidified solder 70 can be made to have a symmetrical structure, such as... Figure 4 As shown, this helps to provide a uniform load transfer path to the molten and solidified solder 70, thereby optimizing stress distribution, reducing stress concentration, and improving the structural strength and welding reliability of the weld between the lens barrel 10 and the upper shell 20.

[0045] In some embodiments, such as Figure 5 As shown, an expansion groove 1222 is provided on the side of the mounting part 12 opposite to the first step part 221, and / or an expansion groove 1222 is provided on the side of the first step part 221 opposite to the mounting part 12. The expansion groove 1222 communicates with the gap 40, that is, the molten solder 70 can flow into the expansion groove 1222 from the gap 40. It should be understood that by providing the expansion groove 1222, the contact area between the solder 70 and the lens barrel 10 and / or the solder 70 and the upper shell 20 can be increased, thereby improving the welding strength and welding reliability.

[0046] In at least one embodiment, such as Figure 5As shown, the expansion groove 1222 is formed in the second mounting portion 122. It should be understood that, compared to the expansion groove 1222 being formed in the first step portion 221, in this embodiment, the expansion groove 1222 is formed in the second mounting portion 122, which helps to reduce the processing difficulty of the expansion groove 1222, thereby saving processing costs. It should be understood that the molten and solidified solder 70 fills the expansion groove 1222, thus playing a mechanical anchoring role, thereby further enhancing the bonding strength between the molten and solidified solder 70 and the lens barrel 10.

[0047] It is worth mentioning that the cross-sectional shape of the expansion slot 1222 can be as follows: Figure 5 The triangle shown can also be a semicircle, trapezoid, rectangle, or other shapes; this application does not impose any specific restrictions on this.

[0048] In some embodiments, the lens barrel 10 is made of metal, including but not limited to aluminum alloy, copper, stainless steel, or magnesium alloy; the upper shell 20 is made of metal, including but not limited to aluminum alloy, stainless steel, or tinplate; the metal used to manufacture the lens barrel 10 and the metal used to manufacture the upper shell 20 can be the same or different; furthermore, in order to improve welding reliability or reduce welding difficulty, a coating can be provided on the surface of the lens barrel 10 or the upper shell 20, and this application does not impose specific limitations on this.

[0049] In some embodiments, such as Figure 6 As shown, the upper shell 20 also includes an extension 23, which is connected to the positioning portion 21 on opposite sides of the step portion 22. The extension 23 extends along the axial direction of the lens barrel 10 and is connected to the lower shell of the lens assembly 1. It is worth mentioning that the upper shell 20 may also include other structures for connection, positioning, and installation, and this application does not impose specific limitations on this.

[0050] In some embodiments, the lens assembly 1 further includes a circuit board 50, which is connected to the lens barrel 10 and located on the light-emitting side of the lens barrel 10. Furthermore, a photosensitive chip 60 is disposed on the circuit board 50, which can receive light emitted from the lens barrel 10 and form an image.

[0051] In some embodiments, the lens barrel 10 is first welded to the upper shell 20, and then the assembly consisting of the lens barrel 10 and the upper shell 20 is focused on the circuit board 50 carrying the photosensitive chip 60. After focusing, the circuit board 50 and the lens barrel 10 are bonded and fixed. In other embodiments, the lens barrel 10 is first focused on the circuit board 50 carrying the photosensitive chip 60. After focusing, the circuit board 50 and the lens barrel 10 are bonded and fixed, and then the assembly consisting of the lens barrel 10 and the circuit board 50 is welded to the upper shell 20. This application does not impose specific limitations on this.

[0052] In some embodiments, such as Figure 2 and Figure 6 As shown, the lens barrel 10 is placed on the upper housing 20 from the outside in and welded; in other embodiments, such as Figure 7 As shown, the lens barrel 10 is placed on the upper housing 20 from the inside out and welded thereon; this application does not impose specific limitations on this. It should be understood that "from the outside in" means from the outside of the lens assembly 1 housing to the inside of the housing; "from the inside out" means from the inside of the lens assembly 1 housing to the outside of the housing.

[0053] The basic principles, main features, and advantages of this utility model have been described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lens assembly, characterized by, include: A lens barrel, which carries an optical lens; The upper shell has a support surface and a stepped portion. The support surface supports the lens barrel. The stepped portion includes a first stepped portion and a second stepped portion. The first stepped portion is connected to the support surface and extends axially along the lens barrel, such that the first stepped portion surrounds the outer periphery of the lens barrel, defining a gap between the first stepped portion and the lens barrel. The second stepped portion is connected to the side of the first stepped portion opposite to the support surface and extends axially along the lens barrel, such that the second stepped portion surrounds the outer periphery of the lens barrel, defining a solder groove between the second stepped portion, the first stepped portion, and the lens barrel. The solder groove accommodates solder and communicates with the gap, such that the molten and solidified solder fills the gap to seal the lens barrel and the upper shell.

2. The lens assembly of claim 1, wherein, The upper shell also includes a positioning part connected to the stepped portion. The positioning part has a positioning hole. When the lens barrel is placed on the supporting surface of the upper shell, at least a portion of the lens barrel extends into the positioning hole, and the positioning part can radially position the lens barrel.

3. The lens assembly according to claim 2, characterized in that, The bearing surface is formed on one side surface of the positioning part perpendicular to the axial direction of the lens barrel to support the lens barrel.

4. The lens assembly according to claim 1, characterized in that, The first stepped portion has a guide surface on the side facing the lens barrel, and the guide surface is inclined so that the solder groove and the gap are connected in a transitional manner.

5. The lens assembly according to claim 1, characterized in that, The lens barrel includes a connected main body and a mounting part, the main body being able to carry an optical lens; the mounting part extends radially from the outer peripheral surface of the main body, and the mounting part is able to abut against the bearing surface so that the lens barrel is supported on the upper shell.

6. The lens assembly according to claim 5, characterized in that, The mounting portion includes a first mounting portion and a second mounting portion, wherein the first mounting portion extends radially from the outer peripheral surface of the main body portion, and the second mounting portion extends radially from the outer peripheral surface of the first mounting portion. When the lens barrel is placed on the bearing surface of the upper shell, the first mounting portion and the second step portion are arranged radially opposite to each other to define the solder groove between the first mounting portion and the second step portion, and the second mounting portion and the first step portion are arranged radially opposite to each other to define the gap between the second mounting portion and the first step portion.

7. The lens assembly according to claim 6, characterized in that, The second mounting part has a guide surface on the side facing the first step part. The guide surface is inclined to transition between the solder groove and the gap.

8. The lens assembly according to claim 5, characterized in that, An expansion groove is provided on the side of the mounting part opposite to the first step part, and / or an expansion groove is provided on the side of the first step part opposite to the mounting part, and the expansion groove communicates with the gap.

9. The lens assembly according to any one of claims 1-8, characterized in that, The lens barrel is made of metal, and the upper shell is made of metal.

10. The lens assembly according to any one of claims 1-8, characterized in that, The lens assembly also includes a circuit board connected to the lens barrel and located on the light-emitting side of the lens barrel.

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