Lens module roll riveting device, lens module roll riveting method and lens module

Abstract

The present application relates to a kind of lens module roll riveting equipment, lens module roll riveting method and lens module.The lens module roll riveting equipment, including: equipment platform;Pressing tool, pressing tool is rotatably arranged in equipment platform, for pressing lens module shell and lens module lens body, to form preassembled component;Multiple roll riveting tools, roll riveting tool is arranged in the periphery of pressing tool with interval, roll riveting tool includes roll riveting assembly and adjusting assembly, adjusting assembly is fixed on equipment platform, and it is adjustably connected to roll riveting assembly, to adjust the distance of roll riveting assembly and the center of pressing tool;And drive assembly, drive assembly is driven to be connected to pressing tool or equipment platform, for driving pressing tool relative to equipment platform positive or reverse rotation, to drive roll riveting assembly relative to preassembled component rotation, make roll riveting assembly roll riveting rib of shell is rolled and riveted in roll riveting groove of lens body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of camera modules, in particular to a lens module roll riveting device, a lens module roll riveting method and a lens module. BACKGROUND

[0002] With the rapid development of camera technology, the market of camera modules is continuously compressed, and the cost reduction and efficiency improvement of camera modules become more important. Based on this, in order to reduce the manufacturing cost of camera modules, low-cost scheme design and new process development are needed for camera modules, and the assembly method of the lens module of the camera module is optimized to achieve cost reduction and efficiency improvement.

[0003] The existing lens module generally includes a lens, a locking ring, a sealing ring, a shell and glue. With glue, the locking ring is riveted to the lens body, and the lens body and the shell are fixedly connected. This lens module scheme has high material cost, and the locking ring usually adopts a press riveting process. During press riveting, there is sliding friction between the riveting pressure head and the surface of the roll riveting rib, which is easy to wear the roll riveting rib after sliding, resulting in debris burrs and other situations. Such burrs and debris have a short circuit risk when falling on the surface of the components during subsequent module power-on operation, which has high risk hidden dangers. In addition, since the press riveting scheme is to press the end of the riveting rib into the roll riveting groove, there is a gap between the lens body and the shell, which cannot be completely fitted, affecting the combination of the lens body and the shell. SUMMARY

[0004] Therefore, it is necessary to provide a lens module roll riveting device, a lens module roll riveting method and a lens module in view of the problem of burrs and debris caused by sliding friction in the existing lens module press riveting method.

[0005] A lens module roll riveting device, comprising:

[0006] a device platform;

[0007] a pressing jig, which is rotatably arranged on the device platform and is used to press the shell of the lens module and the lens body of the lens module to form a pre-assembled component;

[0008] a plurality of roll riveting jigs, which are arranged in a circle around the pressing jig at intervals, the roll riveting jig comprising a roll riveting assembly and an adjusting assembly, the adjusting assembly being fixedly arranged on the device platform and adjustably connected to the roll riveting assembly to adjust the distance between the roll riveting assembly and the center of the pressing jig; and

[0009] A driving assembly is connected to the pressing jig or the equipment platform, and is configured to drive the pressing jig to rotate forward or reversely relative to the equipment platform, so as to drive the roll riveting assembly to rotate relative to the pre-assembly, and drive the roll riveting assembly to roll rivet the roll riveting rib of the shell into the roll riveting groove of the lens body.

[0010] The roll riveting jig further comprises at least one self-locking assembly arranged between the roll riveting assembly and the equipment platform, and configured to limit the roll riveting assembly from approaching the pressing jig in a self-locking state.

[0011] The self-locking assembly comprises a fixed block, a self-locking sliding block, an elastic member and a limiting member. The fixed block is fixedly arranged on the equipment platform, the limiting member is fixedly arranged on the roll riveting assembly, the fixed block has a sliding groove, the self-locking sliding block is slidably arranged in the sliding groove, and the elastic member is arranged between the self-locking sliding block and the fixed block, so that the self-locking sliding block abuts against the limiting member.

[0012] In one embodiment, the adjusting assembly comprises a fixed member fixedly arranged on the equipment platform, an adjusting member, a reset member and a matching member. The matching member is fixedly arranged on the fixed member, the roll riveting assembly is slidably connected to the fixed member, the reset member is arranged between the roll riveting assembly and the fixed member, so that the adjusting member abuts against the roll riveting assembly, and the adjusting member is screwed into the matching member, so as to push the roll riveting assembly to approach the center of the pressing jig when rotating.

[0013] In one embodiment, the surfaces of the adjusting member and the matching member have scales, and the scales are used to display the adjusting distance of the adjusting member.

[0014] In one embodiment, the roll riveting assembly comprises a connecting member slidably connected to the fixed member in the radial direction of the pressing jig, and a roll riveting member rotatably connected to the connecting member, and the adjusting member abuts against the connecting member.

[0015] In one embodiment, the pressing jig comprises a rotating member rotatably arranged on the equipment platform, and a plurality of pressing members. The rotating member has a mounting groove for mounting the shell and the lens body, and the pressing members are detachably mounted around the mounting groove, and are configured to press the shell and the lens body to form a pre-assembly.

[0016] A lens module roll riveting method is used to assemble a lens module by using the lens module roll riveting equipment described above, and comprises the following steps:

[0017] The lens body of the lens module and the shell of the lens module are pressed by the pressing jig to obtain a pre-assembly.

[0018] According to the set feeding amount, the adjusting assembly is adjusted to move the roll riveting assembly to the roll riveting position;

[0019] The driving assembly is driven to rotate the pressing jig or the equipment platform to drive the roll riveting assembly to rotate relative to the pre-assembled assembly, so that the roll riveting assembly roll rivets the roll riveting rib of the shell into the roll riveting groove of the lens body; and

[0020] The adjusting assembly is adjusted to move the roll riveting assembly to the initial position, and the pre-assembled assembly after roll riveting is removed to obtain the assembled lens module.

[0021] In one embodiment, the step of driving the pressing jig or the equipment platform to rotate to drive the roll riveting assembly to rotate relative to the pre-assembled assembly, so that the roll riveting assembly roll rivets the roll riveting rib of the shell into the roll riveting groove of the lens body includes the steps of:

[0022] The driving assembly is driven to rotate the pressing jig forward by a set angle or the equipment platform reversely by a set angle to drive the roll riveting assembly to rotate forward relative to the pre-assembled assembly, so that the roll riveting assembly reversely roll rivets the roll riveting rib of the shell; and

[0023] The driving assembly is driven to rotate the pressing jig reversely by the set angle or the equipment platform forward by a set angle to drive the roll riveting assembly to rotate reversely relative to the pre-assembled assembly, so that the roll riveting assembly forward roll rivets the roll riveting rib of the shell.

[0024] A lens module, comprising:

[0025] A lens body having a roll riveting groove;

[0026] A shell having a roll riveting rib, the roll riveting rib covers the roll riveting groove, the shell is riveted to the lens body by the lens module roll riveting method described above; and

[0027] A sealing member arranged between the lens body and the shell.

[0028] Compared with the lens module with the existing locking ring structure, the lens module of the present application optimizes the structure of the locking ring, does not need to use glue, has fewer material quantities and lower material costs, and can effectively reduce production costs. The lens module roll riveting device of the present application can utilize plastic deformation of the roll riveting rib of the lens module, can make the shell roll riveting rib and the lens body fit more closely, and can avoid the problems of debris or burrs by converting sliding friction into rolling friction, thereby solving the short circuit problem caused by burrs and debris from the root. The lens module roll riveting method of the present application can more effectively reduce stress and can reduce the influence of stress on the lens optical system. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A structural schematic diagram of a lens module is provided for an embodiment of the present application;

[0030] Figure 2 An enlarged schematic diagram of a roll riveting groove of the lens module according to the above embodiment of the present application is shown;

[0031] Figure 3 A top view schematic diagram of a roll riveting groove of the lens module according to the above embodiment of the present application is shown;

[0032] Figure 4 A top view schematic diagram of a roll riveting device of the lens module is provided for an embodiment of the present application;

[0033] Figure 5 A roll riveting schematic diagram of the roll riveting device of the lens module according to the above embodiment of the present application is shown;

[0034] Figure 6 A step schematic diagram of a roll riveting method of the lens module is provided for an embodiment of the present application;

[0035] Figure 7 A step schematic diagram of step S300 of the roll riveting method of the lens module according to the above embodiment of the present application is shown;

[0036] Figure 8A A structural schematic diagram of the lens module at step S100 of the roll riveting method of the lens module according to the above embodiment of the present application is shown;

[0037] Figure 8B A structural schematic diagram of the lens module at step S200 of the roll riveting method of the lens module according to the above embodiment of the present application is shown;

[0038] Figure 8C A structural schematic diagram of the lens module at step S310 of the roll riveting method of the lens module according to the above embodiment of the present application is shown;

[0039] Figure 8D A structural schematic diagram of the lens module at step S320 of the roll riveting method of the lens module according to the above embodiment of the present application is shown;

[0040] Figure 8E A structural schematic diagram of the lens module at step S400 of the roll riveting method of the lens module according to the above embodiment of the present application is shown;

[0041] Figure 9 A contour plot of a CAE simulation of the roll riveting method of the lens module according to the above embodiment of the present application is shown.

[0042] 1. The rivet assembly includes the following elements: 1. The rivet assembly includes the following elements: 1. The rivet assembly includes the following elements: 2. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 1. The rivet assembly includes the following elements: 2. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: 3. The rivet assembly includes the following elements: DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0047] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0049] Based on the problem that the current press riveting method of the existing lens module produces burrs and debris due to sliding friction, the present application provides a lens module rolling riveting device, a lens module rolling riveting method and a lens module.

[0050] For details, please refer to Figure 1 、 Figure 2 and Figure 3 The lens module 40 provided in the present application may include a lens body 41, a shell 42 and a seal 43. The lens body 41 is provided with a rivet groove 411, and the shell 42 has a rivet rib 421. The rivet rib 421 is covered in the rivet groove 411. The shell 42 is riveted to the lens body 41 by the lens module rivet method provided in the present application. The seal 43 is arranged between the lens body 41 and the shell 42 to seal the gap between the lens body 41 and the shell 42.

[0051] It is understandable that, compared to the existing lens module 40 with a locking ring structure, the lens module 40 of the present application optimizes the structure of the locking ring, does not require the use of glue, and the overall solution has fewer materials and lower material costs, which can effectively reduce production costs. In addition, the roll rivet rib 421 of the shell 42 of the lens module 40 of the present application covers the roll rivet groove 411. The roll rivet rib 421 is plastically deformed by the roll riveting process and riveted into the roll rivet groove 411. The roll rivet rib 421 and the roll rivet groove 411 can form a tight fit, avoiding the problem of a gap between the outer surface of the lens body 41 and the inner surface of the shell 42 after being bonded, thereby improving the compatibility of the lens body 41 and the shell 42.

[0052] Alternatively, as Figure 1 As shown, in some embodiments, the housing 42 is provided with a sealing groove 412, and the sealing member 43 is disposed in the sealing groove 412. By squeezing the lens body 41 and the housing 42 against the sealing member 43, the sealing member 43 can seal the gap between the lens body 41 and the housing 42. The sealing member 43 can be implemented as an O-ring.

[0053] Preferably, if Figure 2 As shown, in some embodiments, the bottom of the rivet groove 411 of the lens body 41 is arc-shaped, the groove wall of the rivet groove 411 is tangent to the groove bottom, and the groove wall of the rivet groove 411 and the side wall of the lens body 41 are connected by a round chamfer transition.

[0054] For details, please refer to Figure 4 and Figure 5 The present application also provides a lens module riveting device, which may include an equipment platform 10, a pressing jig 20, multiple riveting jigs 30, and a drive assembly. The pressing jig 20 is rotatably disposed on the equipment platform 10. The pressing jig 20 can be used to press the housing 42 of the lens module 40 and the lens body 41 of the lens module 40, so that the lens body 41 and the housing 42 form a pre-assembled assembly for subsequent riveting operations. The riveting jigs 30 are arranged circumferentially at intervals around the pressing jig 20 and are used to rivet the riveting ribs 421 of the housing 42. The riveting jig 30 includes a riveting assembly 31 and an adjustment assembly 32. The adjustment assembly 32 is fixed to the equipment platform 10 and is adjustably connected to the riveting assembly 31. By adjusting the adjustment assembly 32, the distance between the center of the riveting assembly 31 and the pressing jig 20 can be adjusted to control the feed rate of the riveting assembly 31. The driving assembly is connected to the pressing jig 20 or the equipment platform 10 to drive the pressing jig 20 to rotate forward or reverse, thereby driving the rivet assembly 31 to rotate relative to the pre-assembled assembly, so that the rivet assembly 31 roll-rivets the rivet rib 421 of the shell 42 into the rivet groove 411 of the lens body 41.

[0055] It is understandable that when the lens module rolling riveting equipment is used to assemble the lens module 40, the driving assembly drives the pressing jig 20 or the equipment platform 10 to rotate, thereby driving the rolling rivet assembly 31 to rotate relative to the pre-assembled assembly consisting of the lens body 41 and the shell 42, so that the rolling rivet assembly 31 squeezes the rolling rivet rib 421, causing plastic deformation, thereby riveting the rolling rivet rib 421 into the rolling rivet groove 411, thereby fixing the shell 42 to the lens body 41. The rolling riveting process is a rolling plastic deformation method that can make the rolling rivet rib 421 of the shell 42 and the lens body 41 fit more tightly. Compared with the traditional press riveting process, the rolling riveting process converts sliding friction into rolling friction, thereby avoiding problems such as debris or burrs, and solving the short circuit problem caused by burrs and debris from the root.

[0056] Optionally, in some embodiments, the driving assembly may be implemented as a stepping motor so as to more accurately control the rotation angle of the device platform 10 or the pressing fixture 20 .

[0057] More specifically, if Figure 4 As shown, in some embodiments, the adjustment assembly 32 includes a fixing member 321, an adjustment member 322, a reset member and a matching member 323. The fixing member 321 is fixed to the equipment platform 10, and the matching member 323 is fixed to the fixing member 321. The rivet roll assembly 31 is slidably connected to the fixing member 321. The reset member is provided between the rivet roll assembly 31 and the fixing member 321 so that the adjustment member 322 abuts against the rivet roll assembly 31. The adjustment member 322 is threadedly engaged with the matching member 323. When the adjustment member 322 is rotated, the adjustment member 322 can slide along the axis direction of the threaded hole. The rivet roll assembly 31 is slidably connected to the fixing member 321, and the adjustment member 322 abuts against the rivet roll assembly 31 to push the rivet roll assembly 31 close to the center of the pressing jig 20 when rotating. In this way, by controlling the rotation angle of the adjusting member 322 , the sliding distance of the riveting roller assembly 31 can be controlled, thereby more accurately controlling the feed amount of the riveting roller assembly 31 .

[0058] Preferably, if Figure 4 As shown, in some embodiments, the surfaces of the mating piece 323 and the adjusting piece 322 have scales, which are used to display the adjustment distance of the adjusting piece 322. By reading the scales on the surfaces of the mating piece 323 and the adjusting piece 322, the sliding distance of the rolling rivet assembly 31 can be more intuitively observed, thereby obtaining more accurate feed amount information.

[0059] Exemplarily, in one of the embodiments, the adjusting assembly 32 can be improved from a micrometer, in which the scale on the fitting piece 323 is the fixed scale of the micrometer, and the scale on the adjusting piece 322 is the movable scale of the micrometer, and the feeding amount of the roll riveting assembly 31 can be read according to the reading mode of the micrometer, so as to accurately read the feeding amount to 0.01 mm.

[0060] Further, as Figure 4 shown, in some embodiments, the roll riveting assembly 31 comprises a connecting piece 311 and a roll riveting piece 312, the connecting piece 311 is slidably connected to the fixed piece 321 along the radial direction of the pressing jig 20, the roll riveting piece 312 is rotatably connected to the connecting piece 311, and the adjusting piece 322 abuts against the connecting piece 311, and when the adjusting piece 322 rotates, the adjusting piece 322 can push the connecting piece 311 to slide along the radial direction of the pressing jig 20. The roll riveting piece 312 is used for roll riveting the roll riveting ribs 421 of the shell 42, and when the roll riveting jig 30 and the pre-assembly generate relative rotation, the roll riveting piece 312 is driven to rotate relative to the connecting piece 311 by the roll riveting ribs 421 of the shell 42, so that the roll riveting ribs 421 and the roll riveting piece 312 generate rolling friction, thereby completely solving the problem of generating debris in the assembly process.

[0061] It can be understood that the thickness of the outer periphery of the roll riveting piece 312 gradually increases from the center to form a roll riveting surface, and through the roll riveting surface, the roll riveting piece 312 can extrude the roll riveting ribs 421 of the shell during rotation, so that the roll riveting ribs 421 are deformed and riveted into the roll riveting grooves 411 of the lens body 41.

[0062] Exemplarily, as Figure 5 shown, in some embodiments, the roll riveting piece 312 can be implemented as a pulley or a ball.

[0063] Optionally, in some embodiments, a plurality of the roll riveting jigs 30 are symmetrically arranged around the center of the pressing jig 20 on the equipment platform 10, and the number of the roll riveting jigs 30 is the same as the number of the roll riveting ribs 421 of the shell 42. In this way, the stress of the shell 42 can be more uniform, and each roll riveting rib 421 receives the same torsional force.

[0064] Preferably, as Figure 4 shown, in one of the embodiments, the number of the roll riveting jigs 30 is two, and the two roll riveting jigs 30 are symmetrically arranged on the two sides of the pressing jig 20.

[0065] Further, as Figure 4As shown, in some embodiments, the roll riveting jig 30 further comprises at least one self-locking assembly 33 arranged between the roll riveting assembly 31 and the equipment platform 10 for limiting the roll riveting assembly 31 from sliding towards the pressing jig 20 in a self-locking state. In this way, the roll riveting assembly 31 can be limited in the open state by the self-locking assembly 33 so as to quickly load the lens body 41 and the shell 42 into the pressing jig 20, avoiding interference of the roll riveting assembly 31, thereby saving the time for loading and unloading and improving the production efficiency.

[0066] Optionally, as Figure 4 As shown, in one of the embodiments, the self-locking assembly 33 comprises a fixed block 331, a self-locking sliding block 332, an elastic member 333 and a limiting member 334, the fixed block 331 is fixedly arranged on the equipment platform 10, the limiting member 334 is fixedly arranged on the roll riveting assembly 31, the fixed block 331 has a sliding groove, the self-locking sliding block 332 is slidably arranged in the sliding groove, the elastic member 333 is arranged between the self-locking sliding block 332 and the fixed block 331 to make the self-locking sliding block 332 abut against the limiting member 334. In this way, the elastic member 333 can make the self-locking sliding block 332 have a tendency to move away from the fixed block 331, thereby enabling the elastic member 333 to maintain the self-locking state, when the self-locking sliding block 332 is pushed to press the elastic member 333, the self-locking sliding block 332 can be separated from the limiting member 334, and the limiting member 334 can slide with the roll riveting assembly 31.

[0067] Optionally, in some embodiments, the elastic member 333 can be implemented as a compression spring.

[0068] Preferably, as Figure 4As shown, in some embodiments, two groups of the fixed block 331, the self-locking slider 332 and the elastic member 333 are arranged on both sides of the rolling rivet assembly 31 in a direction perpendicular to the sliding direction of the rolling rivet assembly 31, and the limiting member 334 is set in a direction perpendicular to the sliding direction of the rolling rivet assembly 31. The self-locking slider 332 has a first guide surface 3321, and the first guide surface 3321 extends obliquely from the outside to the inside in a direction away from the clamping jig 20. The limiting member 334 has a second guide surface 3341, and the second guide surface 3341 extends obliquely from the outside to the inside in a direction away from the clamping jig 20. When the rivet roller assembly 31 slides in a direction away from the pressing jig 20, the first guide surface 3321 cooperates with the second guide surface 3341, and the limiter 334 can push the self-locking slider 332 to slide toward the fixed block 331, so that the limiter 334 is separated from the self-locking slider 332. After the limiter 334 is separated from the self-locking slider 332, the self-locking slider 332 is pushed back by the elastic member 333, thereby limiting the limiter 334 from sliding in a direction close to the pressing jig 20, thereby realizing the self-locking function of the rivet roller assembly 31. In this way, the self-locking assembly 33 can be quickly switched to the self-locking state.

[0069] Furthermore, if Figure 4 As shown, in some embodiments, the pressing fixture 20 includes a rotating member 21 and a plurality of pressing members 22, wherein the rotating member 21 is rotatably connected to the device platform 10, and the rotating member 21 has a mounting groove for mounting the shell 42 and the lens body 41, and the pressing member 22 is detachably mounted around the mounting groove. When the shell 42 and the lens body 41 are installed in the mounting groove, the pressing member 22 can press the shell 42 and the lens body 41. In this way, through the cooperation of the pressing member 22 and the rotating member 21, the shell 42 and the lens body 41 are pressed to zero gap in the art seam, and the shell 42 and the lens body 41 are kept in a pressed state. After being fixed by rolling rivets, the shell 42 and the lens body 41 can be assembled more tightly, so that the sealing performance of the lens module 40 is better and the appearance is more beautiful.

[0070] Optionally, in some embodiments, the pressing member 22 may be detachably fixed to the rotating member 21 by bolts.

[0071] Furthermore, if Figure 6 As shown, the present application also provides a lens module rolling riveting method for assembling a lens module using the lens module rolling riveting device. The lens module rolling riveting method includes the following steps:

[0072] S100, using a pressing jig to press the lens body of the lens module and the housing of the lens module to obtain a pre-assembled assembly;

[0073] S200, adjust the adjusting assembly according to the set feed amount, so that the roll riveting assembly moves to a rolling position;

[0074] S300, drive the pressing jig or the equipment platform to rotate by the driving assembly, so as to drive the roll riveting assembly to rotate relative to the pre-assembled assembly, so that the roll riveting assembly rolls and rivets the roll riveting rib of the shell into the roll riveting groove of the lens body; and

[0075] S400, adjust the adjusting assembly, so that the roll riveting assembly moves to an initial position, and the pre-assembled assembly after roll riveting is removed, so as to obtain an assembled lens module.

[0076] It can be understood that the above steps of the lens module roll riveting method according to the present application can be performed in the following manner when assembling the lens module 40 according to the present application, as shown in Figure 8A , the shell and the lens body 41 can be first fixed and pressed by the pressing jig 20; as shown in Figure 8B , then the roll riveting assembly 31 is adjusted to the rolling position of the side surface of the roll riveting rib 421 by the adjusting assembly 32 according to the set feed amount; as shown in Figure 8C , Figure 8D and Figure 8E , the pressing jig 20 or the equipment platform 10 is driven to rotate by the driving jig, and the roll riveting rib 421 is plastically deformed by the relative rotation between the roll riveting assembly 31 and the roll riveting rib 421 of the shell 42, so that the roll riveting rib 421 is riveted into the roll riveting groove 411 of the lens body 41.

[0077] Preferably, as shown in Figure 7 , in some embodiments, the above S300, the driving assembly drives the pressing jig or the equipment platform to rotate, so that the roll riveting assembly rotates relative to the pre-assembled assembly, and the roll riveting assembly rolls and rivets the roll riveting rib of the shell into the roll riveting groove of the lens body includes the following steps:

[0078] S310, the driving assembly drives the pressing jig to rotate forward by a set angle or the equipment platform to rotate reversely by a set angle, so as to drive the roll riveting assembly to rotate forward relative to the pre-assembled assembly, so that the roll riveting assembly reversely rolls the roll riveting rib of the shell; and

[0079] S320, the driving assembly drives the pressing jig to rotate reversely by the set angle or the equipment platform to rotate forward by a set angle, so as to drive the roll riveting assembly to rotate reversely relative to the pre-assembled assembly, so that the roll riveting assembly forwardly rolls the roll riveting rib of the shell.

[0080] In this way, the roll rivet 421 can be riveted into the roll rivet groove 411 in step S310, and the fit between the roll rivet 421 and the roll rivet groove 411 can be ensured in step S320.

[0081] It is worth noting that the above steps S310 and S320 can be repeated multiple times to ensure that the roll rivet 421 is completely riveted into the roll rivet groove 411.

[0082] The advantages of the above lens module roll riveting method of the present application will be further described below in combination with specific examples.

[0083] The present application provides 11 groups of lens modules with different sizes of roll rivet grooves and roll rivets, and the specific sizes are shown in Table 1 below.

[0084] Table 1: Comparison table of sizes of roll rivet grooves and roll rivets of each group of lens modules

[0085]

[0086] As shown in Figure 2 and Figure 3 , R1 is the radius of the bottom of the roll rivet groove 411, R2 is the radius of the circular chamfer between the roll rivet groove 411 and the side wall of the lens body 41, α1 is the included angle between the groove wall of the roll rivet groove 411 and the horizontal direction, h1 is the length of the groove wall of the roll rivet groove 411 in the vertical direction, h2 is the horizontal distance between the center of the bottom of the roll rivet groove 411 and the side wall of the lens body 41, h3 is the length of the roll rivet groove 411 in the vertical direction, and α2 is the central angle of the roll rivet 421.

[0087] The present application provides three roll riveting schemes for each of the above 11 groups of lens modules 40, and CAE simulation and DOE verification are performed, and the roll riveting schemes and DOE verification results are shown in Table 2.

[0088] Table 2: DOE verification results table

[0089]

[0090] The CAE simulation results are as follows Figure 9The CAE simulation results are shown in the contour plot, s-stress components represent the stress value at the integral point, unit (mises), simple average represents the simple average value of stress, the CAE simulation stress of the roll riveting process is 30 MPa, and the CAE simulation stress of the traditional pressure riveting process is generally 100 MPa, so the lens module roll riveting method of the application can more effectively reduce the stress and reduce the influence of stress on the lens optical system.

[0091] From the CAE simulation results and the DOE verification results, the lens module 40 of the above-mentioned scheme 1 is the optimal scheme, which is in the best parameters from the thrust, torsion and slice observation. The number of the roll riveting ribs 421 of the shell 42 of the lens module 40 of the application is preferably two sections, the central angle of the roll riveting rib 421 is preferably 100°, the rib thickness of the roll riveting rib 421 is preferably 5 mm, the radius of the groove bottom of the roll riveting groove 411 of the lens body 41 is preferably 0.4 mm, the radius of the circular chamfer between the roll riveting groove 411 and the side wall of the lens body 41 is preferably 0.2 mm, the included angle between the groove wall of the roll riveting groove 411 and the horizontal direction is preferably 154.3°, the length of the groove wall of the roll riveting groove 411 in the vertical direction is preferably 0.13 mm, the horizontal distance between the center of the groove bottom of the roll riveting groove 411 and the side wall of the lens body 41 is preferably 0.2 mm, and the length of the roll riveting groove 411 in the vertical direction is preferably 1.33 mm. The setting feed amount of the lens module roll riveting method of the application is preferably 0.4 mm, and in order to preset a certain allowance, the setting angle of the lens module roll riveting method of the application is 120°.

[0092] The technical features of the above embodiments can be combined in any way, and in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0093] The above embodiments only express several embodiments of the application, the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are within the scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A lens module rolling riveting device, characterized in that: include: device platform; A pressing jig, the pressing jig being rotatably disposed on the equipment platform and being used to press the housing of the lens module and the lens body of the lens module to form a pre-assembled assembly; a plurality of riveting roll jigs, the riveting roll jigs being circumferentially arranged at intervals around the pressing jig, the riveting roll jig comprising a riveting roll assembly and an adjustment assembly, the adjustment assembly being fixed to the equipment platform and adjustably connected to the riveting roll assembly to adjust the distance between the riveting roll assembly and the center of the pressing jig; as well as a driving assembly, the driving assembly being drivably connected to the pressing jig or the device platform and configured to drive the pressing jig to rotate forward or reverse relative to the device platform, thereby driving the riveting roll assembly to rotate relative to the pre-assembled assembly, so that the riveting roll assembly roll-rivets the riveting rib of the housing into the riveting roll groove of the lens body; The roll riveting jig further includes at least one self-locking component, which is arranged between the roll riveting assembly and the equipment platform and is used to limit the roll riveting assembly from sliding close to the pressing jig in a self-locking state; The self-locking assembly includes a fixed block, a self-locking slider, an elastic member and a limit member. The fixed block is fixed to the equipment platform, and the limit member is fixed to the rolling riveting assembly. The fixed block has a slide groove, and the self-locking slider is slidably set in the slide groove. The elastic member is set between the self-locking slider and the fixed block so that the self-locking slider abuts against the limit member.

2. The lens module rolling riveting equipment according to claim 1, characterized in that: The adjustment assembly includes a fixing part, an adjustment part, a reset part and a matching part fixed to the equipment platform. The matching part is fixed to the fixing part. The roll rivet assembly is slidably connected to the fixing part. The reset part is arranged between the roll rivet assembly and the fixing part so that the adjustment part abuts against the roll rivet assembly. The adjustment part is threadedly engaged with the matching part to push the roll rivet assembly close to the center of the clamping jig when rotating.

3. The lens module rolling riveting equipment according to claim 2, characterized in that: The surfaces of the adjusting member and the matching member are provided with scales, and the scales are used to display the adjustment distance of the adjusting member.

4. The lens module rolling riveting equipment according to claim 2, characterized in that: The rolling riveting assembly includes a connecting piece that can be slidably connected to the fixing piece along the radial direction of the pressing jig and a rolling riveting piece that can be rotatably connected to the connecting piece, and the adjusting piece abuts against the connecting piece.

5. The lens module rolling riveting equipment according to any one of claims 1 to 4, characterized in that: The pressing fixture includes a rotating part rotatably arranged on the equipment platform and a plurality of pressing parts, the rotating part has a mounting groove for installing the shell and the lens body, and the pressing parts are detachably installed around the mounting groove to press the shell and the lens body to form a pre-assembled component.

6. A lens module rolling riveting method for assembling a lens module by using the lens module rolling riveting device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Using a pressing jig, the lens body of the lens module and the housing of the lens module are pressed together to obtain a pre-assembled assembly; According to the set feed rate, adjust the adjustment component to move the riveting roller assembly to the rolling position; The pressing jig or the equipment platform is driven to rotate by the driving assembly, thereby driving the riveting assembly to rotate relative to the pre-assembled assembly, so that the riveting assembly roll-rivets the riveting rib of the housing into the riveting groove of the lens body; and The adjusting assembly is adjusted to move the rolling riveting assembly to the initial position, and the pre-assembled assembly after rolling riveting is removed to obtain an assembled lens module.

7. The lens module roll riveting method according to claim 6, characterized in that: The step of driving the pressing jig or the equipment platform to rotate by the driving assembly to drive the riveting assembly to rotate relative to the pre-assembled assembly so that the riveting assembly rolls the riveting rib of the housing into the riveting groove of the lens body comprises the following steps: The driving assembly drives the pressing fixture to rotate forwardly at a set angle or the equipment platform to rotate backwardly at a set angle, thereby driving the riveting roller assembly to rotate forwardly relative to the pre-assembled assembly, so that the riveting roller assembly rolls the riveting rib of the shell in the reverse direction; and The driving assembly drives the pressing jig to rotate in the reverse direction by the set angle or the equipment platform to rotate in the forward direction by the set angle, thereby driving the rivet rolling assembly to rotate in the reverse direction relative to the pre-assembled assembly, so that the rivet rolling assembly rolls the rivet rib of the shell in the forward direction.

8. A lens module, characterized in that: include: A lens body having a roll rivet groove; A housing, the housing having a roll rivet rib, the roll rivet rib covering the roll rivet groove, the housing being riveted to the lens body by the roll riveting method for a lens module according to any one of claims 6 to 7; as well as A sealing member is provided between the lens body and the housing.

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