Camera module and electronic equipment

Abstract

The utility model discloses a camera module and electronic equipment. The camera module comprises a lens assembly, the lens assembly comprises a lens seat and at least one lens accommodated in the lens seat, the lens seat is provided with a body part, a first mounting part and a second mounting part, the first mounting part extends from the upper side of the body part to the direction of the lens, and the second mounting part is arranged at the lower end of the body part; the circuit board supports the mirror base, and the second mounting part of the mirror base and the circuit board are oppositely arranged along the optical axis; wherein the lens base is provided with at least one glue containing expansion groove, the glue containing expansion groove is formed in the first mounting part and / or the second mounting part, the glue containing expansion groove is recessed inwards from the mounting surface, opposite to the lens, of the first mounting part, and / or the glue containing expansion groove is recessed inwards from the mounting surface, opposite to the circuit board, of the second mounting part. Therefore, the contact area between the lens base and the adhesive is increased, the adhesive force of the adhesive is fully exerted, the lens and the lens base are prevented from being separated from each other or the lens base and the circuit board are prevented from being separated from each other, and the connection reliability is improved.

Description

A camera module and electronic device Technical Field

[0001] This application relates to camera modules, and more specifically to a camera module and an electronic device. Background Technology

[0002] Currently, autonomous driving systems have significantly increased requirements for environmental perception accuracy, leading to a substantial increase in the number of vehicle-mounted cameras to cover multiple perspectives, including front, rear, and side views. The COB (Chip-on-Board) process, with its high integration and simplified packaging process, has become the preferred technology for vehicle-mounted camera modules. It uses adhesives for bonding and fixing the lens mount components during installation and attachment, reducing the module's size and cost, and better meeting the miniaturization needs of vehicle-mounted cameras.

[0003] However, in actual use, the following defects exist: continuous bumps during vehicle operation, such as uneven road surfaces and engine vibrations, cause the adhesive interface to be subjected to shear forces and fatigue loads, leading to adhesive detachment or breakage, resulting in the camera falling off. Summary of the Invention

[0004] One objective of this application is to provide a camera module and electronic device that increases the contact area between the adhesive material and the lens mount by providing a first groove and a second groove, thereby improving the reliability of the connection.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a camera module, comprising: a lens assembly, the lens assembly including a lens mount and at least one lens element housed within the lens mount, the lens mount having a body portion, a first mounting portion, and a second mounting portion, the first mounting portion extending from the upper side of the body portion toward the lens element, and the second mounting portion disposed at the lower end of the body portion; a circuit board supporting the lens mount, and the second mounting portion of the lens mount and the circuit board being disposed opposite each other along the optical axis; wherein, the lens mount has at least one adhesive expansion groove, the adhesive expansion groove being formed in the first mounting portion and / or the second mounting portion, the adhesive expansion groove being recessed inward from the mounting surface opposite to the lens element of the first mounting portion, and / or the adhesive expansion groove being recessed inward from the mounting surface opposite to the circuit board of the second mounting portion.

[0006] As a preferred embodiment, a first adhesive gap is formed between the first mounting portion and the horizontal mounting surface of the lens opposite to it, and a second adhesive gap is formed between the first mounting portion and the vertical mounting surface of the lens opposite to it. The adhesive expansion groove can expand the first adhesive gap and / or the second adhesive gap, and the first mounting portion is bonded to the lens through the adhesive in the first adhesive gap and the second adhesive gap.

[0007] As another preferred embodiment, a third adhesive gap is formed between the second mounting portion and the horizontal mounting surface of the circuit board opposite to it, and the adhesive expansion groove expands the third adhesive gap, through which the second mounting portion is bonded to the circuit board by the adhesive in the third adhesive gap.

[0008] Further preferably, the cross-sectional shape of the adhesive expansion groove is semi-circular, rectangular, trapezoidal or triangular, the depth of the adhesive expansion groove is 0.05mm-0.17mm, and the width of the adhesive expansion groove is 0.09mm-0.30mm.

[0009] Further preferably, the adhesive expansion groove includes a first adhesive expansion groove and a second adhesive expansion groove, wherein one or more first adhesive expansion grooves are provided, one or more second adhesive expansion grooves are provided, and the first adhesive expansion groove is recessed inward from the end face of the first mounting portion opposite to the horizontal mounting surface of the lens.

[0010] More preferably, the first mounting portion includes a first end face and a second end face, the second mounting portion includes a third end face, the first adhesive expansion groove is formed by recessing upward from the first end face along the optical axis direction, and the second adhesive expansion groove is formed by recessing upward from the third end face along the optical axis direction.

[0011] Further preferably, the inner sides of the first adhesive expansion groove and the second adhesive expansion groove are serrated surfaces.

[0012] Further preferably, the ratio q of the width of the first end face to the width of the first adhesive expansion groove satisfies: 2≤q≤5.

[0013] Further preferably, the depth of the first adhesive expansion groove is 0.05mm-0.10mm, the width of the first adhesive expansion groove is 0.10mm-0.30mm, the depth of the second adhesive expansion groove is 0.07mm-0.17mm, and the width of the second adhesive expansion groove is 0.09mm-0.17mm.

[0014] A second aspect of this application provides an electronic device that includes the aforementioned camera module.

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

[0016] (1) By providing adhesive expansion grooves on the first mounting part and the second mounting part, the contact area between the lens mount and the adhesive is increased, the adhesive force of the adhesive is fully utilized, and the lens and the lens mount are prevented from detaching from each other or the lens mount and the circuit board are detached from each other, thereby increasing the reliability of the connection.

[0017] (2) The adhesive expansion groove can restrict the flow direction of the adhesive, prevent the adhesive from overflowing onto the lens, prevent the lens from being contaminated, and ultimately affect the imaging effect; or prevent the adhesive from flowing onto the circuit board and causing a short circuit. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of a camera module in the prior art.

[0019] Figure 2 is a structural schematic diagram of a camera module from a first-view perspective according to some embodiments of this application.

[0020] Figure 3 is a cross-sectional view of a camera module according to some embodiments of this application.

[0021] Figure 4 is an enlarged view of region A in Figure 3.

[0022] Figure 5 is an enlarged view of region B in Figure 3.

[0023] Figure 6 is a cross-sectional view of a camera module according to some other embodiments of this application.

[0024] Figure 7 is an enlarged view of region C in Figure 6.

[0025] Figure 8 is an enlarged view of region D in Figure 6.

[0026] Figure 9 is a partial structural schematic diagram of a mirror mount according to some other embodiments of this application.

[0027] Figure 10 is a cross-sectional view of a camera module according to some other embodiments of this application.

[0028] Figure 11 is an enlarged view of region E in Figure 10.

[0029] Figure 12 is an enlarged view of region H in Figure 10.

[0030] In the diagram: 1. Camera module; 10. Lens assembly; 11. Lens mount; 111. Body; 112. First mounting part; 1121. First end face; 1122. Second end face; 113. Second mounting part; 1131. Third end face; 114. Adhesive expansion groove; 1141. First adhesive expansion groove; 1142. Second adhesive expansion groove; 115. First adhesive gap; 116. Second adhesive gap; 117. Third adhesive gap; 12. Lens; 20. Circuit board. Detailed Implementation

[0031] The present application 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.

[0032] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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, and should not be construed as limiting the specific protection scope of this application.

[0033] 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.

[0034] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0035] As shown in Figure 1, in the prior art, the lens 12 is fixed to the lens base 11 by adhesive, and the areas where the adhesive contacts the lens 12 and the lens base 11 are planar, with the adhesive filling the space between the lens 12 and the lens base 11. In actual use, the vibration of the car during driving can cause the adhesive between the lens base 11 and the lens 12 to fall off, causing the lens 12 to detach from the lens base 11. Moreover, since the area filled with adhesive is planar, it cannot restrict the flow direction of the adhesive, which can cause the adhesive to overflow. The overflowing adhesive can flow onto the surface of the lens, affecting the imaging effect, or the adhesive can flow onto the circuit board 20, causing circuit problems.

[0036] Therefore, based on the above analysis, this application provides a camera module 1, as shown in FIG2, wherein the lens assembly 10 is mounted on the circuit board 20.

[0037] In some embodiments, the camera module 1 includes: a lens assembly 10, the lens assembly 10 including a lens mount 11 and at least one lens 12 housed within the lens mount 11, the lens mount 11 having a body portion 111, a first mounting portion 112, and a second mounting portion 113, the first mounting portion 112 extending from the upper side of the body portion 111 toward the lens 12, and the second mounting portion 113 being disposed at the lower end of the body portion 111; and a circuit board 20 supporting the lens mount 11, wherein the second mounting portion 113 of the lens mount 11 and the circuit board 20 are disposed opposite each other along the optical axis F, wherein the lens mount 11 has at least one adhesive expansion groove 114, the adhesive expansion groove 114 being formed in the first mounting portion 112 and the second mounting portion 113, the adhesive expansion groove 114 being recessed inward from the mounting surface opposite to the first mounting portion 112 and the lens 12, and / or the adhesive expansion groove 114 being recessed inward from the mounting surface opposite to the second mounting portion 113 and the circuit board 20.

[0038] In some embodiments, as shown in Figures 2 and 3, where Figure 3 is an enlarged view of region A in Figure 2, a first mounting portion 112 is disposed on the upper side of the body portion 111, near the lens 12, for bonding the lens 12 to the lens mount 11. A second mounting portion 113 is disposed on the lower side of the body portion 111, that is, near the circuit board 20, for bonding the circuit board 20 to the second mounting portion 113. The lens mount 11 is provided with an adhesive expansion groove 114, which is respectively disposed on the first mounting portion 112 and the second mounting portion 113. First, the adhesive expansion groove 114 is formed by inward recessing, and adhesive is filled into the adhesive expansion groove 114 to increase the adhesion between the adhesive and the lens mount 111. The contact area between the lens mount 11 and the lens 12 allows the adhesive to fully exert its bonding force, thereby fixing and bonding the lens mount 11 to the lens 12 and the circuit board 20 respectively, preventing the lens 12 and the circuit board 20 from detaching from the lens mount 11, and increasing the reliability of the fixed connection. Secondly, the adhesive expansion groove 114 can restrict the flow direction of the adhesive, preventing the adhesive from overflowing onto the lens 12 and the circuit board 20. If the adhesive flows onto the surface of the lens 12, it will affect the imaging effect of the camera module 1. If the adhesive flows onto the circuit board 20, it will cause the circuit board 20 to short circuit. Therefore, the adhesive expansion groove 114 plays a guiding role in the flow direction of the adhesive, ensuring the imaging effect of the camera module 1 and the stability during use.

[0039] In some embodiments, the adhesive expansion groove 114 may be disposed on the first mounting portion 112 to expand the first adhesive gap 115, or it may be disposed on the second mounting portion 113 to expand the second adhesive gap 116, or it may be disposed on both the first mounting portion 112 and the second mounting portion 113, without limitation.

[0040] In some embodiments, a first adhesive gap 115 is formed between the first mounting portion 112 and the horizontal mounting surface of the lens 12 opposite to it, and a second adhesive gap 116 is formed between the first mounting portion 112 and the vertical mounting surface of the lens 12 opposite to it. The adhesive expansion groove 114 expands the first adhesive gap 115 and the second adhesive gap 116, and the first mounting portion 112 is bonded to the lens 12 by the adhesive in the first adhesive gap 115 and the second adhesive gap 116.

[0041] In some embodiments, as shown in FIG4, a first adhesive gap 115 is formed between the first mounting part 112 and the horizontal mounting surface of the lens 12. Adhesive is filled in the first adhesive gap 115 so that the top of the lens 12 is bonded to the lens base 11. The adhesive expansion groove 114 expands the first adhesive gap 115 to increase the contact area between the adhesive and the lens base 11, so that the adhesive can fully exert its adhesive force, thereby fixing the lens 12 and the lens base 11 to each other.

[0042] In some embodiments, as shown in FIG4, a second adhesive gap 116 is formed between the first mounting portion 112 and the vertical mounting surface of the lens 12. Adhesive is filled into the second adhesive gap 116 to bond the side of the lens 12 to the lens base 11, making the bonding between the lens 12 and the lens base 11 more reliable. The adhesive expansion groove 114 expands the second adhesive gap 116 to increase the contact area between the adhesive and the lens base 11, making the connection between the circuit board 20 and the lens base 11 more reliable. Moreover, the adhesive in the second adhesive gap 116 has a certain elasticity, so that the periphery of the lens 12 and the lens base 11 elastically abut against each other. The adhesive absorbs stress through elastic deformation, preventing the lens 12 from being damaged by stress and improving the service life of the lens 12.

[0043] In some embodiments, the adhesive may be any one of UV-curable adhesive, epoxy resin adhesive, anaerobic adhesive or silicone adhesive, and the type of adhesive is not limited herein.

[0044] In some embodiments, the adhesive expansion groove 114 can expand the first adhesive gap 115, or the second adhesive gap 116, or both the first adhesive gap 115 and the second adhesive gap 116 simultaneously, without limitation.

[0045] It is worth noting that, as shown in Figure 5, when adhesive is used to fill the second adhesive gap 116, the adhesive does not completely fill the second adhesive gap 116. This is because adhesive expands and contracts with temperature changes. If the adhesive completely fills the second adhesive gap 116, its expansion would compress the periphery of the lens 12, potentially causing the lens 12 to break. Therefore, the adhesive only fills a portion of the second adhesive gap 116. When the adhesive expands, it can extend within the second adhesive gap 116 along the extension direction of the optical axis F, reducing the compressive force on the lens 12 in the direction perpendicular to the optical axis F, thus preventing breakage and increasing the lifespan of the lens 12. If the second adhesive gap 116 were completely filled with adhesive, the adhesive would expand in the direction perpendicular to the optical axis F, causing the periphery of the lens 12 to be subjected to compressive force from the adhesive, leading to breakage.

[0046] In some embodiments, a third adhesive gap 117 is formed between the second mounting portion 113 and the horizontal mounting surface of the circuit board 20 opposite to it. The adhesive expansion groove 114 expands the third adhesive gap 117, and the second mounting portion 113 is bonded to the circuit board 20 through the adhesive in the third adhesive gap 117.

[0047] In some embodiments, as shown in FIG4, a third adhesive gap 117 is formed between the second mounting part 113 and the horizontal mounting surface of the circuit board 20. The adhesive expansion groove 114 expands the third adhesive gap 117, increasing the contact area between the adhesive and the mirror base 11, thereby improving the reliability of the connection between the second mounting part 113 and the circuit board 20. At the same time, the third adhesive gap 117 is filled with adhesive, so that the second mounting part 113 and the circuit board 20 can elastically abut against each other. The adhesive can absorb stress through elastic deformation, preventing the circuit board 20 from breaking due to rigid contact between the two.

[0048] In some embodiments, the cross-sectional shape of the adhesive expansion groove 114 is semi-circular, rectangular, trapezoidal or triangular, the depth of the adhesive expansion groove 114 is 0.05mm-0.17mm, and the width of the adhesive expansion groove 114 is 0.09mm-0.30mm.

[0049] In some embodiments, the cross-sectional shape of the adhesive expansion groove 114 can be semi-circular, rectangular, trapezoidal, or triangular to suit different installation environments. No limitation is made on the cross-sectional shape of the adhesive expansion groove 114 here. The depth of the adhesive expansion groove 114 is between 0.05mm and 0.17mm. If the depth is less than 0.05mm, the contact area between the adhesive and the lens mount 11 will be too small, leading to loosening between the lens mount 11 and the lens 12 or between the lens mount 11 and the circuit board 20, resulting in detachment. If the depth is greater than 0.17mm, the adhesive expansion groove 114 is too deep. For adhesives with poor flowability, the adhesive expansion groove 114 cannot be fully filled, resulting in insufficient adhesive strength and easy loosening and detachment during use.

[0050] In some embodiments, the width of the adhesive expansion groove 114 is between 0.09mm and 0.30mm. If the width is less than 0.09mm, the adhesive expansion groove 114 is close to a gap. For high-viscosity adhesives, the flow resistance is large, which may cause the adhesive to fail to flow into the adhesive expansion groove 114 or the adhesive to fail to fill the adhesive expansion groove 114. If the width is greater than 0.30mm, more adhesive needs to be filled, resulting in a waste of adhesive.

[0051] In some embodiments, the adhesive expansion groove 114 includes a first adhesive expansion groove 1141 and a second adhesive expansion groove 1142. The first adhesive expansion groove 1141 is provided with one or more, and the second adhesive expansion groove 1142 is provided with one or more. The first adhesive expansion groove 1141 is recessed inward from the end face of the first mounting portion 112 opposite to the horizontal mounting surface of the lens 12.

[0052] In some embodiments, the adhesive expansion groove 114 includes a first adhesive expansion groove 1141 and a second adhesive expansion groove 1142, and one or more of the first adhesive expansion groove 1141 and the second adhesive expansion groove 1142 are provided, which can be set according to the actual installation situation, and is not limited here. As shown in FIG4, the first adhesive expansion groove 1141 is formed by recessing relative to the surface of the first mounting part 112. In the processing process, the processing steps are relatively simple and the processing cost is lower.

[0053] In some embodiments, the first mounting portion 112 includes a first end face 1121 and a second end face 1122, the second mounting portion 113 includes a third end face 1131, the first adhesive expansion groove 1141 is formed by recessing upward from the first end face 1121 along the optical axis F, and the second adhesive expansion groove 1142 is formed by recessing upward from the third end face 1131 along the optical axis F.

[0054] In some embodiments, as shown in FIG9, the first mounting portion 112 includes a first end face 1121 and a second end face 1122. The first end face 1121 and the second end face 1122 are bent and connected. The first end face 1121 is disposed opposite to the horizontal mounting surface of the lens 12, and the second end face 1122 is disposed opposite to the vertical mounting surface of the lens 12. The first adhesive expansion groove 1141 is formed by being recessed upward relative to the first end face 1121. During the processing, the first adhesive expansion groove 1141 can be formed by milling. Moreover, the first adhesive expansion groove 1141 is integrally formed with the first mounting portion 112, avoiding the seam formed by bonding and preventing the adhesive from overflowing.

[0055] In some embodiments, the second mounting portion 113 is provided with a third end face 1131, which is disposed opposite to the horizontal mounting surface of the circuit board 20. The second adhesive expansion groove 1142 is formed by being recessed upward relative to the third end face 1131. During the process of filling adhesive, the second adhesive expansion groove 1142 can restrict the flow direction of adhesive, prevent adhesive from overflowing onto the circuit board 20, and avoid short circuit of the circuit board 20.

[0056] Compared to providing a notch on the outer side of the second mounting portion 113, i.e., providing a chamfer on the side of the second mounting portion 113 away from the lens 12, thereby forming a notch with the circuit board 20 for accommodating adhesive, the adhesive is filled into the notch, increasing the area of ​​the adhesive that can contact the outside air, which leads to a faster oxidation rate of the adhesive. Moreover, during the process of filling the adhesive, the adhesive is prone to overflow and flow onto the surface of the circuit board 20, which can cause a short circuit in the circuit board 20. Therefore, by providing a recessed second adhesive expansion groove 1142 on the third end face 1131, on the one hand, the flow direction of the adhesive can be restricted, avoiding adhesive overflow, reducing unnecessary waste, and preventing a short circuit in the circuit board 20. On the other hand, it can also reduce the area of ​​the adhesive that contacts the outside air, preventing the adhesive from being oxidized.

[0057] In some embodiments, the inner side surfaces of the first adhesive expansion groove 1141 and the second adhesive expansion groove 1142 are serrated surfaces; as shown in FIG4, the inner side surfaces of the first adhesive expansion groove 1141 and the second adhesive expansion groove 1142 are both serrated surfaces, which increases the surface roughness, making it easier for the adhesive to adhere to the inner sidewall of the adhesive expansion groove 114. The serrated texture of the surface can further guide the flow of the adhesive, avoiding the accumulation of air bubbles or local lack of adhesive due to the smooth surface. Moreover, it can further increase the contact area between the adhesive and the mirror base 11, so that the adhesive can fully exert its adhesive force and enhance the reliability of the bonding.

[0058] In some embodiments, the ratio of the width of the first adhesive expansion groove 1141 to the width of the first end face 1121 is q, where q satisfies: 2≤q≤5. The width of the first adhesive expansion groove 1141 is the width along the direction perpendicular to the optical axis F, and the width of the first end face 1121 is also the width along the direction perpendicular to the optical axis F. If the width ratio q is less than 2, the width of the first adhesive expansion groove 1141 will be too small, and the adhesive will not be able to fill the first adhesive expansion groove 1141, thus failing to enhance the connection strength between the lens mount 11 and the lens 12. If the width ratio q is greater than 5, the amount of adhesive filling will be too large. Due to temperature differences, the adhesive will expand and contract. If too much adhesive is filled, the lens 12 will be subjected to excessive force, which may easily cause the lens 12 to break.

[0059] In some embodiments, the depth of the first adhesive expansion groove 1141 is 0.05mm-0.10mm, the width of the first adhesive expansion groove 1141 is 0.10mm-0.30mm, the depth of the second adhesive expansion groove 1142 is 0.07mm-0.17mm, and the width of the second adhesive expansion groove 1142 is 0.09mm-0.17mm. By limiting the width and depth of the two expansion grooves, a more reasonable adhesive expansion space is formed, which can increase the contact area between the lens mount 11 and the adhesive while ensuring the strength of the lens mount 11.

[0060] In some embodiments, the depth of the first adhesive expansion groove 1141 can be 0.05mm, 0.06mm, 0.07mm, 0.75mm, 0.08mm, 0.09mm or 0.10mm, and the width of the first adhesive expansion groove 1141 can be 0.10mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.21mm, 0.23mm, 0.25mm, 0.27mm, 0.29mm or 0.30mm.

[0061] In some embodiments, the depth of the second adhesive expansion groove 1142 can be 0.07mm, 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.13mm, 0.15mm or 0.17mm, and the width of the second adhesive expansion groove 1142 can be 0.09mm, 0.10mm, 0.12mm, 0.14mm, 0.16mm or 0.17mm.

[0062] In some embodiments, the depth of the first adhesive expansion groove 1141 is 0.05 mm, the width of the first adhesive expansion groove 1141 is 0.3 mm, the width of the first end face 1121 is 0.6 mm, and the ratio q is 2.

[0063] In some embodiments, the depth of the first adhesive expansion groove 1141 is 0.10 mm, the width of the first adhesive expansion groove 1141 is 0.2 mm, the width of the first end face 1121 is 0.6 mm, and the ratio q is 3.

[0064] In some embodiments, the depth of the first adhesive expansion groove 1141 is 0.08 mm, the width of the first adhesive expansion groove 1141 is 0.15 mm, the width of the first end face 1121 is 0.6 mm, and the ratio q is 4.

[0065] In some embodiments, the depth of the first adhesive expansion groove 1141 is 0.08 mm, the width of the first adhesive expansion groove 1141 is 0.16 mm, the width of the first end face 1121 is 0.8 mm, and the ratio q is 5.

[0066] In some embodiments, the depth of the second adhesive expansion groove 1142 is 0.10 mm, the width of the second adhesive expansion groove 1142 is 0.15 mm, and the width of the third end face 1131 along the direction perpendicular to the optical axis F is 0.6 mm. If there are two second adhesive expansion grooves 1142, the ratio of the width of the third end face 1131 to the width of the second adhesive expansion groove 1142 is 2.

[0067] In some embodiments, the first adhesive expansion groove 1141 may be disposed circumferentially on the first mounting portion 112 along the lens base 11, or may be symmetrically disposed on the long or short side of the lens base 11. The second adhesive expansion groove 1142 may be disposed circumferentially on the second mounting portion 113 along the lens base 11, or may be disposed on the long or short side of the lens base 11. No limitation is made here.

[0068] Example 1

[0069] This application also provides another camera module 1, as shown in Figures 6-8. The first adhesive expansion groove 1141 is recessed relative to the first end face 1121, and the cross-section of the first adhesive expansion groove 1141 is rectangular. The inner sidewalls and top surface of the first adhesive expansion groove 1141 are serrated to increase the adhesion of the adhesive. As shown in Figure 7, the first adhesive expansion groove 1141 is provided.

[0070] In other embodiments, the second adhesive expansion groove 1142 is recessed relative to the third end face 1131. The cross-section of the second adhesive expansion groove 1142 is rectangular, and there are two second adhesive expansion grooves 1142, which further increases the contact area between the adhesive and the lens mount 11, thereby increasing the reliability of the connection between the lens mount 11 and the circuit board 20. The filling effect is shown in Figure 8.

[0071] Example 2

[0072] This application also provides a third type of camera module 1, as shown in Figures 10-12. The cross-section of the first adhesive expansion groove 1141 is semi-circular, and the cross-section of the second adhesive expansion groove 1142 is triangular. Furthermore, the inner sidewalls of the first adhesive expansion groove 1141 and the second adhesive expansion groove 1142 are both serrated surfaces to increase the adhesion of the adhesive.

[0073] In some other embodiments, as shown in FIG11, a first adhesive expansion groove 1141 is provided and two second adhesive expansion grooves 1142 are provided to increase the contact area between the adhesive and the mirror base 11, so that the adhesive can further exert its adhesive force, and the filling effect is shown in FIG12.

[0074] On the other hand, this application also provides an electronic device. The electronic device can be a standalone camera, such as a digital camera, or a camera module integrated into an autonomous driving system in a car. This electronic device is equipped with the camera module 1 described above.

[0075] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A camera module, characterized in that, include: A lens assembly includes a lens mount and at least one lens element housed within the lens mount. The lens mount has a body portion, a first mounting portion, and a second mounting portion. The first mounting portion extends from the upper side of the body portion toward the lens element, and the second mounting portion is disposed at the lower end of the body portion. A circuit board supports the lens mount, and the second mounting portion of the lens mount and the circuit board are disposed opposite each other along the optical axis. The lens mount has at least one adhesive expansion groove formed in the first mounting portion and / or the second mounting portion. The adhesive expansion groove is recessed inward from the mounting surface opposite the lens element of the first mounting portion, and / or the adhesive expansion groove is recessed inward from the mounting surface opposite the circuit board of the second mounting portion.

2. The camera module as described in claim 1, characterized in that, A first adhesive gap is formed between the first mounting part and the horizontal mounting surface of the lens opposite to it, and a second adhesive gap is formed between the first mounting part and the vertical mounting surface of the lens opposite to it. The adhesive expansion groove can expand the first adhesive gap and / or the second adhesive gap. The first mounting part is bonded to the lens through the adhesive in the first adhesive gap and the second adhesive gap.

3. The camera module as described in claim 2, characterized in that, A third adhesive gap is formed between the second mounting part and the horizontal mounting surface of the circuit board opposite to it. The adhesive expansion groove expands the third adhesive gap, and the second mounting part is bonded to the circuit board through the adhesive in the third adhesive gap.

4. The camera module as described in claim 1, characterized in that, The cross-sectional shape of the adhesive expansion groove is semi-circular, rectangular, trapezoidal or triangular, the depth of the adhesive expansion groove is 0.05mm-0.17mm, and the width of the adhesive expansion groove is 0.09mm-0.30mm.

5. The camera module as described in claim 4, characterized in that, The adhesive expansion groove includes a first adhesive expansion groove and a second adhesive expansion groove. The first adhesive expansion groove is provided with one or more, and the second adhesive expansion groove is provided with one or more. The first adhesive expansion groove is recessed inward from the end face of the first mounting part opposite to the horizontal mounting surface of the lens.

6. The camera module as described in claim 5, characterized in that, The first mounting portion includes a first end face and a second end face, and the second mounting portion includes a third end face. The first adhesive expansion groove is formed by recessing upward from the first end face along the optical axis direction, and the second adhesive expansion groove is formed by recessing upward from the third end face along the optical axis direction.

7. The camera module as described in claim 6, characterized in that, The inner sides of the first adhesive expansion groove and the second adhesive expansion groove are serrated.

8. The camera module as described in claim 7, characterized in that, The ratio q of the width of the first end face to the width of the first adhesive expansion groove satisfies: 2≤q≤5.

9. The camera module as described in claim 8, characterized in that, The depth of the first adhesive expansion groove is 0.05mm-0.10mm, and the width of the first adhesive expansion groove is 0.10mm-0.30mm. The depth of the second adhesive expansion groove is 0.07mm-0.17mm, and the width of the second adhesive expansion groove is 0.09mm-0.17mm.

10. An electronic device, characterized in that, Includes the camera module as described in any one of claims 1-9.

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