Lens module and electronic equipment

Abstract

The present application discloses a lens module and an electronic device, including a bearing seat, an optical element, a stopper and an adhesive. The bearing seat is suitable for accommodating the optical element. The stopper is suitable for connecting with the bearing seat and pressing the optical element onto the bearing seat. At least one bonding surface is arranged around the stopper. The adhesive is suitable for being arranged between the bonding surface and the bearing seat, and the adhesive forms a maximum dimension direction between the two side surfaces that are farthest apart. The maximum dimension direction is parallel to the contact surface between the optical element and the stopper. The adhesive is suitable for at least maintaining the contact and cooperation between the stopper and the optical element. The present application has the characteristics of high molding precision and stable structure, and can reduce or even eliminate the influence of the stress generated during the curing process of the adhesive on the positioning and fixation of the optical element on the bearing seat.

Description

Technical Field

[0001] The present application relates to the technical field of optical imaging equipment, and in particular to a lens module and an electronic device. Background Art

[0002] High-power optical zoom has always been the development trend of smartphone cameras. However, due to the trend of thinner and lighter smartphones, the traditional lens module structure will not be able to meet the requirements of high-power optical zoom. Therefore, periscope lenses have entered the stage of mobile phone cameras, making long-distance zoom possible. Existing periscope camera modules usually have the function of optical image stabilization (OIS) to improve the quality of photos and enhance the user's photo experience. Generally speaking, periscope camera modules use prisms or reflective surfaces to provide the function of turning the light path, so that the linear light path design can be bent into 90 degrees by using a reflector or prism, thereby converting the thickness of the lens into length, achieving a longer focal length, and changing the structure of the camera module.

[0003] However, the existing lens modules have the following defects: in the periscope camera module, the reflector is usually directly fixed on the movable part of the motor by glue. When the glue is cured, the entire assembly needs to be heated and cured. During the heating process, due to the different materials of the reflector and the supporting reflector, the difference in the thermal expansion coefficients of the materials often leads to structural interference problems caused by thermal expansion between the reflector and the structural parts supporting the reflector, thereby causing the reflector to deform. When the glue curing temperature returns to room temperature, the reflector and the structure supporting the reflector will also produce shrinkage stress due to different dimensional shrinkage rates during cooling. The shrinkage stress may further cause the deformation of the reflector to intensify, or maintain the deformed shape, and it is difficult for the structure to return to the state before the first heating.

[0004] Furthermore, when the voice coil motor or SMA shape memory alloy is working, it is necessary to energize the coil or shape memory alloy. The coil will generate heat when energized, and the generated heat can also be transferred to the moving parts. The SMA shape memory alloy also works on a similar principle. All of the above reasons will cause the moving parts and the reflectors on the moving parts to experience thermal expansion and contraction effects. Since the reflectors and moving parts are made of different materials, when the temperature changes, the degrees of thermal expansion and contraction of the two are different, resulting in stress, which can easily cause the reflectors to deform and reduce the surface accuracy, thereby affecting the optical performance of the reflectors and resulting in unsatisfactory photo-taking effects of the camera module. Summary of the invention

[0005] One purpose of the present application is to provide a lens module and electronic equipment with high molding accuracy and stable structure.

[0006] To achieve the above objectives, the technical solution adopted in the present application is: a lens module, comprising a bearing seat, an optical element, a stopper and an adhesive, the bearing seat being suitable for accommodating the optical element, the optical element at least including a reflector, the stopper comprising a support member, the support member being provided with a pre-pressing portion on a side close to the optical element, the minimum friction force between the pre-pressing portion and the optical element being not less than the gravity of the optical element, the stopper being suitable for connecting with the bearing seat and pressing the optical element onto the bearing seat, at least one bonding surface being provided around the stopper, the adhesive being suitable for being provided between the bonding surface and the bearing seat, and the adhesive forming a maximum dimension direction between the two side surfaces that are farthest apart, the maximum dimension direction being parallel to the contact surface between the reflector and the stopper, and the adhesive being suitable for at least maintaining the contact fit between the stopper and the reflector.

[0007] In some embodiments, the elastic modulus of the pre-pressing portion is smaller than the elastic modulus of the supporting member, and the elastic modulus of the pre-pressing portion is smaller than the elastic modulus of the optical element.

[0008] In some embodiments, an extrusion portion is provided on a side of the support away from the optical element, the elastic modulus of the extrusion portion is smaller than the elastic modulus of the support, the elastic modulus of the extrusion portion is smaller than the elastic modulus of the optical element, and the pre-pressing portion is suitable for deformation to uniformize the force between the support and the mounting device.

[0009] In some embodiments, a positioning channel is provided on the support member, and the pre-pressing portion and the extrusion portion are connected to each other through the positioning channel; the surface area of ​​the pre-pressing portion is the same as the surface area of ​​the extrusion portion.

[0010] In some embodiments, a pre-pressing area is provided on the surface of the optical element, the friction coefficient of the optical element in the pre-pressing area is greater than the friction coefficient of the area outside the pre-pressing area, and the pre-pressing portion is suitable for fitting into the pre-pressing area.

[0011] In some embodiments, the surface friction coefficient of the pre-pressing portion is 0.3 to 0.7, and the friction coefficient of the pre-pressing area is 0.1 to 0.3.

[0012] In some embodiments, the maximum pressure applied by the pre-pressing portion to the optical element is less than the minimum stress for the optical element to produce elastic deformation; the deformation amount generated when the pre-pressing portion contacts the optical element is not less than the maximum deformation amount generated by the pre-pressing portion overcoming gravity.

[0013] In some embodiments, an extension portion is disposed on a side of the limiter close to the bearing seat, and the extension portion is suitable for engaging with the bonding surface to expand the bonding area of ​​the bonding surface.

[0014] In some embodiments, the extension portion is formed with at least one extension end and at least one notch on a side close to the optical element, the extension end is suitable for being snap-fitted and connected with the bearing seat, and the notch is suitable for being snap-fitted and connected with the bearing seat.

[0015] In some embodiments, a snap-fit ​​groove is provided on the supporting seat, and when the limiter is connected to the supporting seat and abuts against the optical element, the snap-fit ​​groove is suitable for accommodating the extension portion and limiting the detachment of the extension portion at least in a direction perpendicular to the bonding surface to which the extension portion is connected.

[0016] In some embodiments, the limiter is provided with a first positioning end and a second positioning end, the first positioning end is provided with a hinge interface, and the support seat is provided with a positioning portion, the hinge interface and the positioning portion are suitable for cooperative connection, so that the second positioning end is suitable for rotating relative to the first positioning end, and the second positioning end is suitable for connecting with the support seat when it moves to the support seat.

[0017] In some embodiments, the length of the hinge port along the line connecting the first positioning end and the second positioning end is greater than the diameter of the positioning portion, and the positioning portion is suitable for moving at the hinge port along the connection direction of the first positioning end and the second positioning end.

[0018] In some embodiments, a first bending portion and a fitting edge are provided on the first positioning end, a bearing edge facing the surface of the optical element is provided on the supporting seat, the fitting edge is suitable for being fitted to the bearing edge, and the first bending portion is suitable for being deformed to push the limiter close to the surface of the optical element.

[0019] In some embodiments, the first bending portion includes a first bending section and a second bending section with different bending directions, the first bending section is far away from the fitting edge, the second bending section is close to the fitting edge, and the angle of the first bending section is greater than the angle of the second bending section.

[0020] In some embodiments, the second positioning end is provided with the bonding surface and is connected to the supporting seat via the adhesive.

[0021] In some embodiments, a second bending portion and an insertion edge are provided on the second positioning end, an alignment slot is provided on the bearing seat, the insertion edge is suitable for being inserted into the alignment slot, a bonding surface is provided on the insertion edge, and the insertion depth of the insertion edge is suitable for being determined by the bonding position of the adhesive in the bonding surface, and the second bending portion is suitable for deformation to overcome the stress generated by the bonding of the insertion edge and the bearing seat.

[0022] In some embodiments, the second bending portion includes a third bending section and a fourth bending section with different bending directions, the third bending section is far away from the insertion edge, the fourth bending section is close to the insertion edge, and the angle of the third bending section is greater than the angle of the fourth bending section.

[0023] In some embodiments, the support seat is provided with a notch portion on one side close to the positioning portion, the notch portion is suitable for accommodating the optical element and cooperating with the stopper to fix the optical element during the process of connecting the stopper with the support seat.

[0024] In some embodiments, a support sheet is disposed on the support seat, the support sheet is suitable for supporting the optical element, the support sheet is suitable for covering a portion of the bottom surface of the optical element, and the support sheet and the optical element are connected by the adhesive.

[0025] In some embodiments, the bonding surface is a planar surface, and the contact surface between the adhesive and the supporting seat is a planar surface.

[0026] An electronic device comprises any one of the lens modules described above.

[0027] Compared with the prior art, the beneficial effects of this application are:

[0028] 1. The lens module and electronic device of the present application are provided with a limiter, and the limiter is used to limit the mobility formed by fixing the optical element, so that a certain buffer margin and activity margin are obtained between the optical element and the supporting seat, thereby reducing the volume of the adhesive and related connecting structures during the adhesive heating and curing process. The volume of the adhesive and related connecting structures is reduced due to thermal expansion, causing direct structural interference on the optical element, and reducing the stress generated by the thermal expansion of the adhesive and related connecting structures. The stress is transmitted to the optical element. In addition, by optimizing the bonding form of the adhesive, the stress generated by the adhesive and the related connecting structures during the cooling process is reduced. The stress is transmitted to the optical element, thereby protecting the optical element from damage and improving the installation accuracy of the optical element.

[0029] 2. The lens module and electronic device of the present application can effectively improve the stability of the limiter installation by hingedly connecting one end of the limiter to the supporting seat and fixing the limiter with an adhesive. The adhesive can help the limiter resist the torsion that may occur after the installation is completed. At the same time, the bonding form of the adhesive also meets the requirement of reducing stress transmission to the optical element during heating and cooling, thereby improving the coordination stability between the limiter, the optical element and the supporting seat, while ensuring the installation accuracy of the optical element. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an overall structural view according to a preferred embodiment of the present application.

[0031] Figure 2 It is an oblique view according to a preferred embodiment of the present application.

[0032] Figure 3 It is a schematic diagram of the contact between the stopper and the optical element according to a preferred embodiment of the present application.

[0033] Figure 4 It is a schematic diagram of the combination of a stopper and an optical element according to a preferred embodiment of the present application.

[0034] Figure 5 It is a cross-sectional view along the AA direction in FIG. 2 according to a preferred embodiment of the present application.

[0035] Figure 6 It is a stereogram of a preferred embodiment according to the present application.

[0036] Figure 7 It is a top view of a preferred embodiment according to the present application.

[0037] Figure 8 It is a schematic diagram of the connection between the limiter and the bearing seat according to a preferred embodiment of the present application.

[0038] Fig. 9 It is a schematic diagram of the coordination when the limiter is hinged to the bearing seat according to a preferred embodiment of the present application.

[0039] Fig.10 It is a schematic diagram of the coordination when the limiter is installed to the bearing seat according to a preferred embodiment of the present application.

[0040] Fig.11 It is a schematic diagram of the cooperation when the limiter is bonded to the bearing seat according to a preferred embodiment of the present application.

[0041] Fig.12 It is a schematic diagram of the matching of an optical element and a supporting seat according to a preferred embodiment of the present application.

[0042] Fig.13 It is a schematic diagram of the overall structure after being combined with a lens according to a preferred embodiment of the present application.

[0043] In the figure: 1. bearing seat; 11. snap-fitting groove; 12. positioning part; 13. bearing edge; 14. alignment slot; 15. notch; 16. support sheet; 2. optical element; 21. pre-pressing area; 3. limiter; 31. support member; 311. positioning channel; 32. pre-pressing part; 33. extrusion part; 34. extension part; 341. extension end; 342. notch; 35. first positioning end; 351. hinge joint; 352. fitting edge; 353. first bending section; 354. second bending section; 36. second positioning end; 361. insertion edge; 362. third bending section; 363. fourth bending section; 4. adhesive. DETAILED DESCRIPTION

[0044] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0045] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0046] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0047] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0048] The present application is further described below with reference to the accompanying drawings:

[0049] like Figures 1 to 13As shown, the present application provides a lens module, including a supporting seat 1, an optical element 2, a limiter 3 and an adhesive 4, the supporting seat 1 is suitable for accommodating the optical element 2, the limiter 3 is suitable for being connected to the supporting seat 1 and limiting the optical element 2 on the supporting seat 1, at least one bonding surface is arranged around the limiter 3, the adhesive 4 is suitable for being arranged between the bonding surface and the supporting seat 1, the main shrinkage and expansion direction of the adhesive 4 between the bonding surface and the supporting seat 1 is parallel to the contact surface between the optical element 2 and the limiter 3, the adhesive 4 is suitable for at least maintaining the contact cooperation between the limiter 3 and the optical element 2, and the adhesive 4 can make the supporting seat 1, the optical element 2 and the limiter 3 assembled together remain relatively stable, and reduce the occurrence of relative movement.

[0050] In the present application, the installation direction of the optical element 2 placed into the supporting seat 1 and the installation direction of the limiter 3 connected to the supporting seat 1 are both carried out from the same side of the supporting seat 1, and the supporting seat 1 is used to limit the movement of the optical element 2 and the limiter 3 on the other sides to improve the structural stability after assembly.

[0051] In some embodiments, the size of the stopper 3 is larger than that of the optical element 2 , and a partial structure of the stopper 3 can be connected to the supporting seat 1 outside the optical element 2 , while the optical element 2 can be fully supported by the stopper 3 .

[0052] In some embodiments, the main shape of the surface of the optical element 2 is rectangular, and the limiters 3 are suitable for being symmetrically arranged on both sides of the optical element 2 and suitable for limiting the shorter sides of the optical element 2, which can reduce the impact on the imaging of the optical element 2 and make the force on the optical element 2 more uniform.

[0053] Since the adhesive 4 will shrink during the cooling process after curing, the shrinkage rate of the adhesive 4 located in various places is consistent during this process. Therefore, the shrinkage of the adhesive 4 will be greater in the direction in which the total amount of adhesive 4 used is greater, and the same is true when the adhesive 4 expands due to heat. It can be seen that the main shrinkage and expansion direction of the adhesive 4 between the bonding surface and the supporting seat 1 can also be understood as the shrinkage and expansion direction in which the shrinkage (expansion) of the adhesive 4 is the largest within a single bonding surface. The shrinkage (expansion) of the adhesive 4 in this shrinkage and expansion direction is greater than the shrinkage (expansion) of the adhesive 4 in other shrinkage and expansion directions.

[0054] In some embodiments, the bonding surface is a planar surface, and the contact surface between the adhesive 4 and the supporting seat 1 is a planar surface, which reduces the torsional force generated by the adhesive 4 on the bonding object during bonding (especially when shrinkage and expansion occur), thereby improving the bonding stability.

[0055] like Figure 2In the embodiment shown, the adhesive 4 between the bonding surface and the bearing seat 1 is in the shape of an elongated strip, and the amount of shrinkage and expansion of the adhesive 4 in the length direction (the x direction between the extension portion and the bearing seat, and the y direction between the first positioning end and the bearing seat) is greater than the amount of shrinkage and expansion in other directions (width, height). Therefore, when the adhesive 4 shrinks and expands, the stress in the length direction (the x direction between the extension portion and the bearing seat, and the y direction between the first positioning end and the bearing seat) is greater than the stress in other directions (width, height).

[0056] From the above, it can be seen that by setting the main shrinkage and expansion direction parallel to the contact surface between the optical element 2 and the stopper 3, the maximum curing stress generated between the stopper 3 and the supporting seat 1 is parallel to the contact surface between the optical element 2 and the stopper 3, and the deformation and displacement of the stopper 3 under the influence of the maximum curing stress can be effectively reduced when it is transmitted to the optical element 2, thereby reducing the pulling and compression of the optical element 2 by the stopper 3, and finally reducing the overall influence of the stopper 3 on the optical element 2 caused by the contraction and expansion of the adhesive 4, thereby improving the stability and assembly accuracy of the optical element 2.

[0057] The main shrinkage and expansion direction can also be understood as, when the adhesive is arranged between the bonding surface and the supporting seat, a maximum dimension direction is formed between the two side surfaces on the adhesive that are farthest apart, and the maximum dimension direction is parallel to the contact surface between the optical element and the limiter. This maximum dimension direction can also be regarded as the main shrinkage and expansion direction.

[0058] Furthermore, the main shrinkage and expansion direction can also be understood as, when the adhesive is arranged between the bonding surface and the bearing seat, the adhesive forms a maximum dimension direction between the two sides with the longest distance in a specific plane, and this maximum dimension direction can also be regarded as the main shrinkage and expansion direction. The torque generated by the adhesive in this maximum dimension direction between the hinge point between the limiter and the bearing seat is a non-rotational torque, that is, when the adhesive shrinks and expands, the limiter will not twist relative to the bearing seat along the hinge point.

[0059] In some embodiments, the adhesive 4 preferably uses low elastic modulus glue, and the elastic modulus of the glue material is between 100 MPa and 500 MPa.

[0060] When the optical element 2 includes a reflector, since the reflector is thinner than the prism, the reflector is equivalent to a mirror. A metal layer is provided inside the reflector to provide reflection, and a glass layer is provided on the metal layer for transmission. However, in this multi-layer structure, the metal layer and the glass layer will also cause temperature change stress due to the different thermal expansion coefficients. In general, the reflector is more sensitive to temperature stress, and the reflector is more likely to warp and deform under the influence of temperature stress. In some extreme cases, the reflector may cause serious local deformation due to unreasonable structural design, and various optical aberrations may occur in severe cases.

[0061] like Figure 3 In the illustrated embodiment, the limiter 3 includes a support member 31, and a pre-pressing portion 32 is provided on the side of the support member 31 close to the optical element 2. The elastic modulus of the pre-pressing portion 32 is smaller than the elastic modulus of the support member 31, and the elastic modulus of the pre-pressing portion 32 is smaller than the elastic modulus of the optical element 2. The pre-pressing portion 32 is suitable for deformation to make the force between the support member 31 and the optical element 2 uniform.

[0062] The elastic modulus refers to the ability of a material to return to its original shape after being acted upon by an external force. By setting the elastic modulus relationship between the support 31, the pre-pressing portion 32 and the optical element 2, the pre-pressing portion 32 can be deformed before the support 31 when a force is applied thereto, thereby ensuring the supporting and limiting effect of the support 31, and can be deformed before the optical element 2, thereby weakening the transmission of the force to the optical element 2.

[0063] In some embodiments, the size of the support member 31 is larger than that of the pre-pressing portion 32 , so that the pre-pressing portion 32 can completely receive, evenly distribute and transmit the force between the support member 31 and the optical element 2 .

[0064] like Figure 3 In the illustrated embodiment, the pre-pressing portion 32 is interference fit between the support 31 and the optical element 2 to provide pre-pressure to the optical element 2. Normally, in order to ensure stability, the direction of the pre-pressure can be designed to be perpendicular to the surface of the optical element 2 by designing the fitting direction between the support 31, the pre-pressing portion 32 and the optical element 2.

[0065] In some embodiments, the pre-pressed portion 32 has a sufficient thickness to limit the support member 31 from contacting the optical element 2 , thereby avoiding hard contact between the support member 31 and the optical element 2 and protecting the surface of the optical element 2 .

[0066] In some embodiments, the pre-pressing portion 32 is made of silicone material.

[0067] In some embodiments, the minimum friction force between the pre-pressing portion 32 and the optical element 2 is not less than the gravity of the optical element 2, and the calculation formula of the friction force f between the pre-pressing portion 32 and the optical element 2 is: f=x*k*μ, wherein x is the elastic expansion and contraction amount of the pre-pressing portion 32, k is the elastic coefficient of the pre-pressing portion 32, and μ is the friction coefficient between the pre-pressing portion 32 and the optical element 2. This ensures that when the lens module is rotated to different directions, relative sliding will never occur between the pre-pressing portion 32 and the optical element 2, thereby improving the stability of the optical element 2.

[0068] like Figure 4In the illustrated embodiment, a pre-pressing area 21 is provided on the surface of the optical element 2, and the friction coefficient of the optical element 2 in the pre-pressing area 21 is greater than the friction coefficient of the area outside the pre-pressing area 21. The pre-pressing portion 32 is suitable for fitting into the pre-pressing area 21. In the present application, the pre-pressing area 21 is provided to provide a greater friction force for the contact between the pre-pressing portion 32 and the surface of the optical element 2, so that the optical element 2 can be fixed by the pre-pressing portion 32 with a greater friction force.

[0069] It can be understood that the optical element 2 is pressed into the supporting seat 1 by the limiter 3, and the greater the pressure applied by the limiter 3 to the optical element 2, the greater the friction between the optical element 2 and the pre-pressing portion 32, so that the state of the optical element 2 after positioning is more stable and less likely to shift, thereby improving reliability. The installation method of pre-pressing by the pre-pressing portion 32, as a non-material curing method, can effectively eliminate various stresses generated by fixing the optical element 2. In the prior art, when glue is used for fixing, the curing of the glue material will produce shrinkage stress, and the thermal expansion coefficient of the glue material is also different from that of other components, which will increase the possibility of deformation when the temperature rises.

[0070] In some embodiments, the area of ​​the pre-pressing region 21 is not less than the contact area between the pre-pressing portion 32 and the optical element 2, ensuring that the pre-pressing portion 32 can smoothly contact the surface of the optical element 2, making the force transmission more uniform and reducing the probability of deformation of the optical element 2.

[0071] In some embodiments, the surface friction coefficient of the pre-pressing portion 32 is 0.3 to 0.7, and the friction coefficient of the pre-pressing area 21 is 0.1 to 0.3. From the perspective of micromechanics, the friction coefficient of the pre-pressing portion 32 of the present application is 2 to 5 times greater than the friction coefficient of the surface of the optical element 2. After verification, it can prevent the optical element 2 with a glass substrate and a silver-plated layer from experiencing stress deformation in a high temperature environment. Since the surface of the optical element 2 may be in various postures, such as inverted or sideways, the weight applied to the pre-pressing portion 32 may change, causing the pre-pressing portion 32 to be further compressed or stretched. In other words, the pressure may become smaller. Therefore, in order to ensure relative friction, within the range of 2 to 5 times, the pre-pressing portion 32 and the optical element 2 can be in relatively close contact, and when the glue shrinks, the pre-pressing portion 32 can also always maintain the position of the optical element 2.

[0072] In some embodiments, the maximum pressure applied by the pre-pressing portion 32 to the optical element 2 is less than the minimum stress for the optical element 2 to produce elastic deformation. The calculation formula for the pressure P applied by the pre-pressing portion 32 to the optical element 2 is: f=x*k*s, wherein x is the elastic expansion and contraction of the pre-pressing portion 32, k is the elastic coefficient of the pre-pressing portion 32, and s is the contact area between the pre-pressing portion 32 and the optical element 2. It can also be understood that the pressure applied by the pre-pressing portion 32 to the optical element 2 is less than the force required for the optical element 2 to produce most of the deformation. By controlling the pressure applied by the pre-pressing portion 32 to the optical element 2, it is ensured that the surface of the optical element 2 will not be deformed in various states of the lens module, or that no deformation that affects the normal use of the optical element 2 will be produced, thereby improving the stability of the optical element 2.

[0073] In some embodiments, the deformation amount generated when the pre-pressing portion 32 abuts against the optical element 2 is not less than the maximum deformation amount generated when the pre-pressing portion 32 overcomes gravity.

[0074] In some embodiments, the extrusion depth of the pre-pressing portion 32 is at least 5% to 40% of the material thickness of the pre-pressing portion 32 when it is not assembled, and the deformation of the pre-pressing portion 32 against its own gravity is less than 5%. Within the above-mentioned compression range, it is enough to ensure that the pre-pressing portion 32 will not fail due to the influence of gravity in various states and postures of the lens module. For example, the pre-pressing portion 32 flips 180 degrees from above the optical element 2 to below the optical element 2. At this time, since it is opposite to the initial position of the assembly, the pre-pressing portion 32 itself may be deformed to a greater extent in the opposite direction of the optical element 2 under the influence of gravity to resist the compressed and deformed part of the original pre-pressing portion 32, thereby causing the pre-pressing portion 32 to return to its original state, thereby causing looseness between the optical element 2 and the pre-pressing portion 32, thereby causing the position of the optical element 2 to shift, thereby affecting the optical imaging of the lens module. In addition, the upper limit of the extrusion depth of the pre-pressing portion 32 is set to avoid excessive deformation of the extrusion portion, which may cause hard contact between the limiter 3 and the optical element 2.

[0075] In some embodiments, an extrusion portion 33 is provided on the side of the support member 31 away from the optical element 2. The elastic modulus of the extrusion portion 33 is smaller than that of the support member 31. The elastic modulus of the extrusion portion 33 is smaller than that of the optical element 2. The pre-pressing portion 32 is suitable for deformation to make the force between the support member 31 and the mounting device uniform. The support member 31 usually needs to be pre-pressed on the optical element 2 by an external mounting device. The mounting device can provide an extrusion pressure to the extrusion portion 33. The extrusion pressure provided by the mounting device can deform the extrusion portion 33. The extrusion portion 33 can use its own deformation to make the extrusion pressure of the mounting device uniform. The extrusion portion 33 and the support member 31 are fixedly connected. The uniform force can be transmitted to the support member 31, and through the transmission and uniform pressure of the support member 31 and the pre-pressing portion 32, the probability of damage to the optical element 2 is reduced.

[0076] In some embodiments, the size of the support member 31 is larger than the size of the extrusion portion 33, so that the extrusion portion 33 can completely receive, evenly distribute and transmit the force between the support member 31 and the installation device.

[0077] In some embodiments, the extruded portion 33 has a sufficient thickness to limit the support member 31 from contacting the optical element 2 , avoid hard contact between the support member 31 and the optical element 2 , and protect the surface of the optical element 2 .

[0078] In some embodiments, the extrusion portion 33 is made of silicone material, and the elastic modulus of the extrusion portion 33 is between 0.1 MPa and 10 MPa.

[0079] like Figure 3 In the illustrated embodiment, a positioning channel 311 is provided on the support member 31, and the pre-stressing portion 32 and the extrusion portion 33 are interconnected via the positioning channel 311. By utilizing the positioning channel 311, the pre-stressing portion 32 can enter the positioning channel 311 when subjected to pressure, and deform and transition toward the side of the extrusion portion 33, thereby enhancing the buffering effect. The same is true when the extrusion portion 33 is subjected to pressure.

[0080] like Figure 3 In the illustrated embodiment, the pre-pressing portion 32 and the extrusion portion 33 are integrally formed on both sides of the support member 31 through the connection of the positioning channel 311 , which can improve the efficiency of force transmission and the stability of the pre-pressing portion 32 and the extrusion portion 33 fixed on the support member 31 .

[0081] In some embodiments, the surface area of ​​the pre-pressing portion 32 is the same as the surface area of ​​the extrusion portion 33, so that when the assembly pressure is applied, the pressed surface can provide the same pressure as the other side. When the limiter 3 is installed by external force, the pressure of the limiter 3 needs to be calculated based on the material properties on the next page, and this calculation process is relatively complicated. Making the surface area of ​​the extrusion portion 33 the same as the surface area of ​​the pre-pressing portion 32 can eliminate some variables. It is only necessary to directly calculate the required assembly pressure and the amount of pre-pressure provided by the external force based on the material properties to offset the stress caused by temperature changes in the process, which can reduce the difficulty of calculation and design.

[0082] like Figure 4 In the illustrated embodiment, an extension portion 34 is provided on one side of the stopper 3 close to the support base 1 , and the extension portion 34 is adapted to engage with the bonding surface to expand the bonding area of ​​the bonding surface, thereby improving the bonding stability between the stopper 3 and the support base 1 on that side.

[0083] like Figure 4In the illustrated embodiment, the extension portion 34 is formed with at least one extension end 341 and at least one notch 342 on the side close to the optical element 2. The extension end 341 is suitable for being snap-fitted with the support base 1, and the notch 342 is suitable for being snap-fitted with the support base 1. The snap-fitting connection between the extension end 341 and the notch 342 and the support base 1 can help the limiter 3 and the support base 1 to obtain a certain stability before bonding, which can assist the bonding process and reduce the difficulty of bonding.

[0084] like Figure 5 In the illustrated embodiment, a snap-fit ​​groove 11 is provided on the supporting seat 1. When the limiter 3 is connected to the supporting seat 1 and abuts against the optical element 2, the snap-fit ​​groove 11 is suitable for accommodating the extension portion 34 and limiting the detachment of the extension portion 34 at least in a direction perpendicular to the bonding surface to which the extension portion 34 is connected. The extension portion 34 and the snap-fit ​​groove 11 can cooperate to serve as a positioning assembly structure to ensure the accuracy of the assembly position of the support member 31.

[0085] like Figure 4 In the illustrated embodiment, the extension portion 34 is formed with a plurality of extension ends 341 and a plurality of notches 342 on the side close to the optical element 2 to form a fin-like structure, which can reduce the structural strength of the extension portion 34 and enable the extension portion 34 to enter the engaging groove 11 more easily.

[0086] In some embodiments, a snap-fit ​​structure may be provided in the snap-fit ​​groove 11 to facilitate fixation of the extension end 341 and / or the notch 342 in the snap-fit ​​groove 11 .

[0087] like Figures 6 to 11 In the shown embodiment, a first positioning end 35 and a second positioning end 36 are provided on the limiter 3, a hinge port 351 is provided on the first positioning end 35, a positioning portion 12 is provided on the support seat 1, the hinge port 351 and the positioning portion 12 are suitable for cooperative connection, so that the second positioning end 36 is suitable for rotating relative to the first positioning end 35, and the second positioning end 36 is suitable for connecting with the support seat 1 when it moves to the support seat 1. The limiter 3 is pre-fixed to the support seat 1 by hingedly connecting the first positioning end 35, thereby reducing the assembly difficulty between the limiter 3 and the optical element 2 and improving the assembly accuracy.

[0088] In some embodiments, the length of the hinge joint 351 along the line connecting the first positioning end 35 and the second positioning end 36 is greater than the diameter of the positioning portion 12. The positioning portion 12 is suitable for moving at the hinge joint 351 along the connection direction of the first positioning end 35 and the second positioning end 36, so as to realize the positioning of the limiter 3 in at least one degree of freedom direction. The support member 31 realizes the limitation of the degree of freedom of the hinge joint 351 along the line connecting the first positioning end 35 and the second positioning end 36 by means of the positioning portion 12 and the hinge joint 351 being sleeved. During assembly, the positioning portion 12 is allowed to move in the hinge joint 351, which is convenient for subsequent high-precision assembly.

[0089] In some embodiments, the hinge port 351 is a waist-shaped hole opening or a rectangular opening, and the positioning portion 12 is a rod-shaped protrusion structure.

[0090] Those skilled in the art should know that errors will occur during the manufacturing and assembly processes of products. In particular, in the field of camera modules, if the manufacturing and assembly errors cause a decrease in the optical performance of the camera module, special attention should be paid, because optical performance is the most core indicator of the camera module's photographic function. In order to prevent the optical element 2 from deforming too much and causing a decrease in optical performance, it is necessary to pay attention to the deformation problem caused by excessive pre-pressure when the limiter 3 is assembled to the optical element 2.

[0091] like Figure 3 and Figure 8 In the illustrated embodiment, a first bending portion and a fitting edge 352 are provided on the first positioning end 35, a bearing edge 13 facing the surface of the optical element 2 is provided on the bearing seat 1, the fitting edge 352 is suitable for fitting to the bearing edge 13, and the first bending portion is suitable for deformation to push the limiter 3 close to the surface of the optical element 2.

[0092] like Figure 3 and Figure 8 In the illustrated embodiment, the first bending portion includes a first bending section 353 and a second bending section 354 with different bending directions, the first bending section 353 is away from the fitting edge 352, the second bending section 354 is close to the fitting edge 352, the angle of the first bending section 353 is greater than the angle of the second bending section 354, the first positioning end 35 generates self-deformation ability through multiple bending sections, after the first positioning end 35 and the supporting seat 1 are matched, the self-deformation ability of the first positioning end 35 can be used to enable the limiter 3 to obtain a force away from the surface of the optical element, in order to make the assembly process smoother, especially to ensure that the support member 31 can be rotated and inserted for assembly after the first positioning end 35 is hinged to the positioning portion 12, the first positioning end 35 is provided with a fitting edge 352, and the supporting seat 1 is provided with a corresponding fitting edge 352. The load-bearing edge 13, after the hinge port 351 of the support member 31 is inserted into the positioning portion 12, when it is rotated to a certain extent, the fitting edge 352 can fit with the load-bearing edge 13 and generate a large extrusion force, thereby helping the support member 31 to fix the optical element 2. At this time, if the fitting edge 352 fits with the load-bearing edge 13, as the source of force, the second bending section 354 is closer to the force point, and one side of the second bending section 354 is parallel to the extrusion force, and the first bending section 353 is far from the force point. Therefore, the side where the first bending section 353 is located is more easily deformed. In the present application, the first bending section 353 has a larger angle to provide more deformation margin during the rotation and insertion process, and can also ensure that the support member 31 can be assembled in a manner of fitting the load-bearing seat 1, and allow the support member 31 to be assembled at a larger angle.

[0093] like Figure 8 In the illustrated embodiment, a bonding surface is provided on the second positioning end 36, and is connected to the supporting seat 1 via an adhesive 4. The bonding surface is provided on the second positioning end 36, and by bonding with the supporting seat 1, the rotational force transmitted from the first positioning end 35 can be overcome, thereby improving the stability of the support member 31.

[0094] like Figure 3 and Figure 8 In the illustrated embodiment, a second bending portion and an insertion edge 361 are provided on the second positioning end 36, an alignment slot 14 is provided on the bearing seat 1, the insertion edge 361 is suitable for being inserted into the alignment slot 14, a bonding surface is provided on the insertion edge 361, and the insertion depth of the insertion edge 361 is suitable for being determined by the bonding position of the adhesive 4 in the bonding surface, and the second bending portion is suitable for deformation to overcome the stress generated by the bonding of the insertion edge 361 and the bearing seat 1. It can be understood that the insertion depth of the insertion edge 361 can adjust the prestress of the prestressed part, thereby providing prestressed support forces of different strengths. Since the second bending portion has bending sections in at least two directions, the second bending portion is the most easily deformed part from the perspective of the first support member 31 as a whole, and the bonding and prestressing stresses can be released through the preferential deformation of the second bending portion.

[0095] In some embodiments, since the insertion edge 361 is rotated relative to the positioning portion 12 and inserted into the alignment slot 14, the opening of the alignment slot 14 needs to be set large enough to avoid structural interference between the insertion edge 361 and the supporting seat 1. At the same time, a guiding structure, such as a step structure, can be set in the alignment slot 14 to guide and limit the insertion edge 361 entering the alignment slot 14, thereby improving the insertion stability of the insertion edge 14 in the alignment slot 14.

[0096] like Figure 3 and Figure 8In the illustrated embodiment, the second bending portion includes a third bending section 362 and a fourth bending section 363 with different bending directions, the third bending section 362 is far away from the insertion edge 361, and the fourth bending section 363 is close to the insertion edge 361, the angle of the third bending section 362 is greater than the angle of the fourth bending section 363, and the second positioning end 36 generates self-deformation ability through multiple bending sections. After the second positioning end 36 and the supporting seat 1 are matched, the self-deformation ability of the second positioning end 36 can be used to enable the limiter 3 to obtain a force away from the surface of the optical element. The second positioning end 36 has a third bending section 362 and a fourth bending section 363, wherein the third bending section 362 is nearly parallel to the surface of the pre-pressure, and the third bending section 362 is closer to the surface of the pre-pressure. The fourth bending section 363 is closer to the pre-stressing portion 32, so it is obvious that the fourth bending section 363 is subjected to a longer pre-stressing torque. Therefore, the fourth bending section 363 is a portion that is more easily deformed than the third bending section 362. In the present application, the fourth bending section 363 serves as an end that is more easily deformed. If the third bending section 362 is deformed too much, there may be a risk of breakage. Therefore, the angle of the third bending section 362 is designed to be smaller than the angle of the fourth bending section 363 to increase the stiffness of the third bending section 362, so that the stiffness of the third bending section 362 and the fourth bending section 363 are consistent, so that the entire second bending portion can be deformed to prevent excessive pressure from causing excessive insertion depth, thereby causing serious deformation of the optical element 2.

[0097] In some embodiments, the bonding surface on the second positioning end 36 is disposed at the insertion edge 361 , and the insertion edge 361 can release stress and achieve an anti-torsion effect by bending and deforming and bonding with the adhesive 4 .

[0098] like Figures 9 to 10 In the shown embodiment, during assembly, after the first positioning end 35 is sleeved on the positioning portion 12, the support member 31 can be fixed near the snap-fit ​​groove 11 of the bearing seat 1 through the extension portion 34, and the extension portion 34 of the support member 31 and the snap-fit ​​groove 11 of the bearing seat 1 are arranged on the outside of the positioning portion 12, and the extension portion 34 and the snap-fit ​​groove 11 are arranged along the connecting direction of the first positioning end 35 and the second positioning end 36, so that, after the first positioning end 35 is sleeved on the positioning portion 12, the support member 31 can be assembled by rotating around the positioning portion 12 with the positioning portion 12 as the rotation center until the extension portion 34 and the snap-fit ​​groove 11 are snap-fitted in a direction perpendicular to the connecting direction of the first positioning end 35 and the second positioning end 36, so that the first support member 31 is limited in the second degree of freedom direction, and finally the fixed support member 31 and the bearing seat 1 are bonded by the adhesive 4.

[0099] like Fig.10 In the illustrated embodiment, during assembly, the insertion edge 361 is then used as the installation position, and the support member 31 is rotated to align the insertion edge 361 with the alignment slot 14 .

[0100] like Fig.10 In the illustrated embodiment, during assembly, the mounting device uses the extruded portion 33 of the support member 31 as a pressing end to press to a certain height to meet the design requirements. Since the pressing force is in a direction perpendicular to the surface of the optical element 2, for the multiple bending sections of the first positioning end 35 and the second positioning end 36, there are at least outer or inner rotation torque points. The first positioning end 35 and the second positioning end 36 are the parts with the smallest rigidity in the support member 31. When the design limit is exceeded, they will self-deform to prevent overpressure, thereby protecting the structural integrity of the optical element 2, and the optical performance will not be reduced due to the deformation of the optical element 2.

[0101] In some embodiments, the width of the extension portion 34 is greater than the width of the insertion edge 361. It can be seen from the above assembly sequence that the bonding and fixation of the limiter 3 on one side of the extension portion 34 is to ensure the overall fixation stability of the limiter 3 on the surface of the optical element 2. Compared with the bonding and fixation between the first positioning end 35 and the supporting seat 1, the bonding and fixation of the limiter 3 on one side of the extension portion 34 has a greater impact on the stability of the limiter 3, because the movement of the limiter 3 causes the displacement of the optical element 2 to cause poor optical performance. When the position displacement is serious, the camera module cannot form an image. Therefore, increasing the bonding area of ​​the limiter 3 on one side of the extension portion 34 as much as possible is beneficial to maintaining the imaging performance.

[0102] like Fig.12 In the illustrated embodiment, the support base 1 is provided with a notch 15 on one side close to the positioning portion 12 . The notch 15 is suitable for accommodating the optical element 2 and cooperating with the stopper 3 to fix the optical element 2 during the connection between the stopper 3 and the support base 1 .

[0103] In some embodiments, the notch 15 is disposed close to the positioning portion 12 so that when the first positioning end 35 and the positioning portion 12 are engaged, pressure is simultaneously provided to the optical element 2 at the notch 15 to prevent the optical element 2 from loosening in the notch 15 .

[0104] In some embodiments, a support sheet 16 is disposed on the support seat 1 . The support sheet 16 is suitable for supporting the optical element 2 . The support sheet 16 is suitable for covering a portion of the bottom surface of the optical element 2 . The support sheet 16 and the optical element 2 are connected by an adhesive 4 .

[0105] like Fig.12 In the illustrated embodiment, at least three lateral sides and one vertical side are used between the optical element 2 and the supporting seat 1 to form a W-shaped support structure, which can provide support force for the middle, sides and bottom of the optical element 2, reduce the influence of the torsional force during the installation of the limiter 3, and avoid eccentricity of the optical element 2.

[0106] like Fig.13 As shown, the present application also provides an electronic device, comprising the lens module of any of the above embodiments.

[0107] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A lens module, characterized in that: It includes a bearing seat, an optical element, a limiter and an adhesive, the bearing seat is suitable for accommodating the optical element, the optical element at least includes a reflector, the limiter includes a support member, the support member is provided with a pre-pressing portion on a side close to the optical element, the minimum friction force between the pre-pressing portion and the optical element is not less than the gravity of the optical element, the limiter is suitable for connecting with the bearing seat and pressing the optical element onto the bearing seat, at least one bonding surface is provided around the limiter, the adhesive is suitable for being arranged between the bonding surface and the bearing seat, and the adhesive forms a maximum dimension direction between the two side surfaces that are farthest apart, the maximum dimension direction is parallel to the contact surface between the reflector and the limiter, and the adhesive is suitable for at least maintaining the contact fit between the limiter and the reflector.

2. A lens module according to claim 1, characterized in that: The elastic modulus of the pre-pressing portion is smaller than the elastic modulus of the supporting member, and the elastic modulus of the pre-pressing portion is smaller than the elastic modulus of the optical element.

3. A lens module as claimed in claim 2, characterized in that: The support member is provided with an extrusion portion on a side away from the optical element, the elastic modulus of the extrusion portion is smaller than the elastic modulus of the support member, the elastic modulus of the extrusion portion is smaller than the elastic modulus of the optical element, and the pre-pressing portion is suitable for deformation to uniformize the force between the support member and the mounting device.

4. A lens module as claimed in claim 3, characterized in that: The support member is provided with a positioning channel, and the pre-pressing portion and the extrusion portion are connected to each other through the positioning channel; the surface area of ​​the pre-pressing portion is the same as the surface area of ​​the extrusion portion.

5. A lens module as claimed in claim 2, characterized in that: A pre-pressing area is provided on the surface of the optical element, the friction coefficient of the optical element in the pre-pressing area is greater than the friction coefficient of the area outside the pre-pressing area, and the pre-pressing portion is suitable for fitting into the pre-pressing area.

6. A lens module as claimed in claim 5, characterized in that: The surface friction coefficient of the pre-pressing portion is 0.3 to 0.7, and the friction coefficient of the pre-pressing area is 0.1 to 0.

3.

7. A lens module as claimed in claim 2, characterized in that: The maximum pressure applied by the pre-pressing part to the optical element is less than the minimum stress for the optical element to produce elastic deformation; the deformation amount generated when the pre-pressing part contacts the optical element is not less than the maximum deformation amount generated by the pre-pressing part overcoming gravity.

8. The lens module according to claim 1, characterized in that: An extension portion is disposed on one side of the stopper close to the bearing seat, and the extension portion is suitable for being connected with the bonding surface to expand the bonding area of ​​the bonding surface.

9. A lens module as claimed in claim 8, characterized in that: The extension portion is formed with at least one extension end and at least one notch on a side close to the optical element, the extension end is suitable for being snap-fitted and connected with the bearing seat, and the notch is suitable for being snap-fitted and connected with the bearing seat.

10. A lens module according to claim 8, characterized in that: The supporting seat is provided with a snap-fitting groove. When the limiter is connected to the supporting seat and abuts against the optical element, the snap-fitting groove is suitable for accommodating the extension part and restricting the extension part from being separated at least in a direction perpendicular to the bonding surface connected to the extension part.

11. The lens module according to claim 1, characterized in that: The limiter is provided with a first positioning end and a second positioning end, the first positioning end is provided with a hinge interface, the support seat is provided with a positioning portion, the hinge interface and the positioning portion are suitable for cooperative connection, so that the second positioning end is suitable for rotating relative to the first positioning end, and the second positioning end is suitable for connecting with the support seat when moving to the support seat.

12. A lens module according to claim 11, characterized in that: The length of the hinge port along the connecting line direction of the first positioning end and the second positioning end is greater than the diameter of the positioning portion, and the positioning portion is suitable for moving at the hinge port along the connecting direction of the first positioning end and the second positioning end.

13. The lens module according to claim 11, characterized in that: The first positioning end is provided with a first bending portion and a fitting edge, the supporting seat is provided with a supporting edge facing the surface of the optical element, the fitting edge is suitable for fitting to the supporting edge, and the first bending portion is suitable for deformation to push the limiter close to the surface of the optical element.

14. A lens module according to claim 13, characterized in that: The first bending portion includes a first bending section and a second bending section with different bending directions, the first bending section is far away from the bonding edge, the second bending section is close to the bonding edge, and the angle of the first bending section is greater than the angle of the second bending section.

15. The lens module according to claim 11, characterized in that: The second positioning end is provided with the bonding surface and is connected to the bearing seat through the adhesive.

16. A lens module according to claim 15, characterized in that: The second positioning end is provided with a second bending portion and an insertion edge, the bearing seat is provided with an alignment slot, the insertion edge is suitable for being inserted into the alignment slot, the insertion edge is provided with a bonding surface, the insertion depth of the insertion edge is suitable for being determined by the bonding position of the adhesive in the bonding surface, and the second bending portion is suitable for deformation to overcome the stress generated by the bonding of the insertion edge and the bearing seat.

17. A lens module according to claim 16, characterized in that: The second bending portion includes a third bending section and a fourth bending section with different bending directions, the third bending section is far away from the insertion edge, the fourth bending section is close to the insertion edge, and the angle of the third bending section is greater than the angle of the fourth bending section.

18. The lens module according to claim 11, characterized in that: The bearing seat is provided with a notch portion at one side close to the positioning portion, wherein the notch portion is suitable for accommodating the optical element and cooperating with the stopper to fix the optical element during the process of connecting the stopper with the bearing seat.

19. The lens module according to claim 1, characterized in that: The bearing seat is provided with a supporting sheet, the supporting sheet is suitable for supporting the optical element, the supporting sheet is suitable for covering a part of the bottom surface of the optical element, and the supporting sheet and the optical element are connected by the adhesive.

20. The lens module according to claim 1, characterized in that: The bonding surface is a plane surface, and the contact surface between the adhesive and the bearing seat is a plane surface.

21. An electronic device, characterized in that: A lens module comprising any one of claims 1 to 20.

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