Lens driving module, camera module and driving module installation method

Abstract

The invention relates to a lens driving module, a camera module and a driving module mounting method. The lens driving module includes: a base; the lens carrier is movably arranged on the base and is used for carrying the optical lens; the driving assembly is configured to drive the lens carrier to move along a first direction relative to the base, the axis of the guide rod is arranged along the first direction, and the guide rod is located between the lens carrier and the base so as to guide the lens carrier to move along the first direction relative to the base; one of the base and the lens carrier is provided with a surface treatment layer, the roughness of the surface treatment layer is greater than that of other positions of the base and the lens carrier, and the guide rod is glued and fixed with the surface treatment layer along the radial direction and is in sliding connection with the other one along the first direction; the surface treatment layer is arranged on one of the base and the lens carrier, so that the roughness of the surface treatment layer is higher than that of the surface of other positions, the guide rod is fixed to the surface treatment layer in an adhesive mode, an adhesive can cover a larger contact area, and therefore the adhesive force between the guide rod and the surface treatment layer is increased.

Description

Technical Field

[0001] The present invention relates to the technical field related to optical lenses, and in particular to a lens driving module, a camera module and a driving module installation method. Background Art

[0002] With the popularization of mobile electronic devices, the related technologies of camera modules applied to mobile electronic devices for helping users to obtain images have been rapidly developed and improved. Currently in the market, consumers have an increasing demand for shooting with camera modules configured in mobile electronic devices.

[0003] At present, the optical lens of the camera module is usually set in the lens carrier of the lens driving module, and the lens carrier is driven by the driving component of the lens driving module to achieve optical focus or optical zoom function. Furthermore, the lens carrier is usually provided with guides such as balls, rollers or guide rods to guide the focusing movement of the lens carrier. Among them, the guide rod can be pre-fixed in one of the mover or stator during installation, and then the installation between the mover and the stator is completed, so the assembly difficulty is lower than that of balls and rollers.

[0004] However, since the guide rod is mostly fixed to the moving and stator by gluing, as the camera module is used for a longer time, the bonding position of the guide rod may become debonded due to insufficient bonding force, and the guide rod may even fall off, thereby affecting the normal use of the camera module and having relatively poor reliability. Summary of the invention

[0005] Based on this, it is necessary to provide a lens drive module, camera module and drive module installation method that can improve the reliability of guide rod gluing to address the problem that the guide rod gluing position of the current lens drive module is prone to debonding or even falling off after long-term use.

[0006] The present application first provides a lens driving module, comprising: a base; a lens carrier, movably arranged on the base, carrying an optical lens; a driving assembly, configured to drive the lens carrier to move relative to the base along a first direction; a guide rod, the axis of which is arranged along the first direction and is located between the lens carrier and the base, so as to guide the lens carrier to move relative to the base along the first direction; one of the base and the lens carrier is provided with a surface treatment layer, the roughness of the surface treatment layer is greater than the roughness of other positions of the two, the guide rod is glued and fixed to the surface treatment layer along a radial direction, and is slidably connected to the other along the first direction.

[0007] In one embodiment, the base has an internal space, and the lens carrier is arranged in the internal space, wherein the base is provided with a surface treatment layer.

[0008] In one embodiment, the base is provided with a first guide rod groove, the lens carrier is provided with a second guide rod groove, the first guide rod groove and the second guide rod groove are arranged opposite to each other, the inner wall of the first guide rod groove is provided with the surface treatment layer, and the guide rod is arranged between the first guide rod groove and the second guide rod groove and is slidably connected to the inner wall of the second guide rod groove along a first direction.

[0009] In one embodiment, the contact area between the inner wall of the first guide rod groove and the guide rod is greater than the contact area between the inner wall of the second guide rod groove and the guide rod.

[0010] In one embodiment, the projections of the first guide rod groove and the second guide rod groove along the first direction are both trapezoidal and the long bottom side of the trapezoid is an open side, and the guide rod contacts three inner walls of the first guide rod groove and one or two inner walls of the second guide rod groove.

[0011] In one embodiment, the length of the first guide rod groove along the first direction is greater than or equal to the length of the guide rod along the first direction.

[0012] In one embodiment, the length of the guide rod along the first direction is greater than the length of the second guide rod groove along the first direction.

[0013] In one embodiment, gaskets are embedded in the inner walls of the first guide rod groove and the second guide rod groove.

[0014] In one embodiment, the first guide rod groove penetrates the base along a first direction or forms a bottom wall in the base along the first direction; the second guide rod groove penetrates the lens carrier along the first direction.

[0015] In one embodiment, the surface treatment layer is a laser engraving treatment layer.

[0016] A second aspect of the present application provides a camera module, including a base, a photosensitive module, an anti-shake driving module, the above-mentioned lens driving module, an optical lens and a housing; The optical lens is disposed on the lens carrier, and is used to receive and emit light along a first direction; The anti-shake driving module is disposed between the base and the lens driving module, and is configured to drive the base to move relative to the base along the second direction and / or the third direction; The photosensitive module is disposed on the base and is used to receive the light emitted by the optical lens for imaging: The outer shell is covered on the base.

[0017] A third aspect of the present application provides a driving module installation method, which is applicable to the above-mentioned lens driving module, and includes the following steps: a. performing a surface treatment on one of the base or the lens carrier to form a surface treatment layer; b. Pre-glue the guide rod and glue the guide rod to the surface treatment layer; c. exposing the glue to light to cure the glue; d. Apply oil to the surface of the guide rod and slide the other of the base or lens carrier onto the guide rod to complete the installation.

[0018] The lens driving module is provided with a surface treatment layer on one of the base or the lens carrier, so that the roughness of the surface treatment layer is higher than that of the surface at other positions. It should be understood that the rough surface has a larger real contact area than the smooth surface. Therefore, by gluing the guide rod to the surface treatment layer, the adhesive can cover a larger contact area, thereby increasing the adhesion between the two, increasing the bonding reliability, and effectively reducing the possibility of the guide rod being debonded or falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of the camera module of this application; Figure 2 A three-dimensional diagram of the lens driving module of the present application; Figure 3 for Figure 2 Exploded diagram of Figure 4 for Figure 2 An enlarged view of the second guide rod groove at A in the middle at another angle; Figure 5 for Figure 2 An enlarged view of the first guide rod groove at B in the middle; Figure 6 for Figure 2 An enlarged view of the second guide rod groove at position C in the middle at another angle; Figure 7 for Figure 2 A three-dimensional view of the lens carrier and the drive assembly at another angle; Figure 8 for Figure 1 A stereogram behind the hidden optical lens; Fig. 9 for Figure 8 Exploded view after hiding the photosensitive module; Fig.10 This is a schematic diagram of the overall process of the driver module installation method of this application.

[0020] Reference numerals: 100, base; 200, photosensitive module; 300, anti-shake driving module; 310, first anti-shake component; 310a, first anti-shake magnet; 310b, first anti-shake coil; 320, second anti-shake component; 320a, second anti-shake magnet; 320b, second anti-shake coil; 330, support member; 330a, first ball; 330b, second ball; 330c, third ball; 400, optical lens; 500, housing; 10. Base; 11. First guide rod slot; 12. Drive circuit board slot; 20. Lens carrier; 21. Second guide rod slot; 211. Limiting groove; 212. Limiting protrusion; 22. Drive magnet slot; 30. Drive assembly; 31. Drive magnet; 32. Drive coil; 33. Drive sensing element; 34. Drive circuit board; 40. Guide rod. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0022] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] 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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0027] Please combine Figure 1 , Figure 2 as well as Figure 3 As shown, the present application first provides a lens driving module, including: a base 10; a lens carrier 20, which is movably arranged on the base 10 and carries an optical lens 400, and the optical lens 400 has an optical axis; a driving assembly 30, configured to drive the lens carrier 20 to move relative to the base 10 along a first direction parallel to the optical axis of the optical lens 400: a guide rod 40, the axis of which is arranged along the first direction and is located between the lens carrier 20 and the base 10, so as to guide the lens carrier 20 to move relative to the base 10 along the first direction; one of the base 10 and the lens carrier 20 is provided with a surface treatment layer, the roughness of the surface treatment layer is greater than the roughness of other positions of the two, the guide rod 40 is glued and fixed to the surface treatment layer along the radial direction, and is slidably connected with the other along the first direction.

[0028] In the present application, a surface treatment layer is provided on one of the base 10 or the lens carrier 20 so that the roughness of the surface treatment layer is higher than that of the surface at other positions. It should be understood that a rough surface has a larger real contact area than a smooth surface, and therefore, by gluing the guide rod 40 to the surface treatment layer, the adhesive can cover a larger contact area, thereby increasing the adhesion between the two, increasing the bonding reliability, and thus effectively reducing the possibility of the guide rod 40 being debonded or falling off.

[0029] Specifically, the surface treatment layer can be obtained by processing the surface of the base 10 or the lens carrier 20 by mechanical, chemical or other methods, wherein the mechanical treatment methods include but are not limited to sandblasting, grinding, wire drawing, knurling, etc., the chemical treatment methods include but are not limited to acid and alkali etching, anodizing, chemical shot peening, etc., and other treatment methods include but are not limited to plasma treatment, laser etching, etc., as long as the surface roughness can be increased to improve the bonding reliability to the guide rod 40, it will be fine.

[0030] Preferably, the surface treatment layer is a laser engraving treatment layer, which is obtained by laser engraving the surface of the base 10 or the lens carrier 20, and has the advantages of high precision and high controllability.

[0031] In some other embodiments, the surface treatment layer may also be an independent part, the roughness of the surface treatment layer is greater than that of the base 10 and the lens carrier 20, and the surface treatment layer is fixed to the base 10 and the lens carrier 20 by welding or other commonly used fixing methods.

[0032] Please combine Figure 2 as well as Figure 3 As shown, in some embodiments, the base 10 has an internal space, and the lens carrier 20 is disposed in the internal space. It should be understood that by disposing the lens carrier 20 in the internal space of the base 10, the volume and weight of the lens carrier 20 can be smaller than that of the base 10, thereby reducing the weight that the driving assembly 30 needs to drive and reducing the power consumption of focusing.

[0033] Specifically, the lens carrier 20 and the base 10 have and only have a degree of freedom of movement along a first direction. That is, the lens carrier 20 is relatively fixed to the base 10 along other directions.

[0034] More specifically, when the camera module is operating the focus, zoom and other functions, the driving component 30 drives the lens carrier 20 to move relative to the base 10 along the first direction, thereby driving the optical lens 400 to move along the first direction, that is, during the focus movement, the lens carrier 20 moves in the base 10; when the camera module is operating the anti-shake function, the anti-shake driving module 300 drives the base 10 to rotate along the second direction or the third direction, and the base 10 drives the lens carrier 20 and the optical lens 400 to rotate along the second direction or the third direction, that is, during the anti-shake movement, the base 10 carries the lens carrier 20 to move. Among them, the second direction and the third direction are both perpendicular to the first direction, and the second direction and the third direction are perpendicular to each other.

[0035] In some other embodiments, the lens carrier 20 may have an internal space, and the base 10 may be disposed in the internal space of the lens carrier 20. In this embodiment, during focusing movement, the lens carrier 20 carries the base 10 to move, and during anti-shake movement, the base 10 moves in the lens carrier 20.

[0036] In some embodiments, the base 10 is provided with a surface treatment layer. That is, the guide rod 40 is fixed to the surface treatment layer of the base 10. It should be understood that by fixing the guide rod 40 to the base 10, when the lens carrier 20 moves relative to the base 10 along the first direction, the lens carrier 20 does not need to carry the guide rod 40, thereby further reducing the weight required to be driven by the driving assembly 30, thereby achieving the effect of reducing the power consumption of focusing.

[0037] Please combine Figure 3 , Figure 4 as well as Figure 5 As shown, in some embodiments, the base 10 is provided with a first guide rod groove 11, the lens carrier 20 is provided with a second guide rod groove 21, the first guide rod groove 11 and the second guide rod groove 21 are arranged opposite to each other, the inner wall of the first guide rod groove 11 is provided with a surface treatment layer, the guide rod 40 is arranged between the first guide rod groove 11 and the second guide rod groove 21 and is slidably connected to the inner wall of the second guide rod groove 21 along a first direction; the guide rod 40 is restricted to a position between the base 10 and the lens carrier 20 by the inner walls of the first guide rod groove 11 and the second guide rod groove 21.

[0038] In some embodiments, the lens driving module includes at least two guide rods 40, a plurality of first guide rod grooves 11 corresponding one-to-one to the guide rods 40 are opened on the base 10, and a plurality of second guide rod grooves 21 corresponding one-to-one to the guide rods 40 are opened on the lens carrier 20 to ensure that the lens carrier 20 will not shift or deflect to one side relative to the guide rods 40, thereby increasing the guiding stability of the guide rods 40 on the lens carrier 20.

[0039] Specifically, the lens driving module includes two guide rods 40, the inner contour of the internal space of the base 10 and the projection of the outer contour of the lens carrier 20 along the first direction are both square, two first guide rod grooves 11 are opened at both ends of the inner wall of one side of the base 10, and two second guide rod grooves 21 are correspondingly opened on the lens carrier 20.

[0040] In some embodiments, the contact area between the inner wall of the first guide rod groove 11 and the guide rod 40 is greater than the contact area between the inner wall of the second guide rod groove 21 and the guide rod 40. It should be understood that, since the surface area of ​​the guide rod 40 is limited, by limiting the contact area between the inner wall of the first guide rod groove 11 to be greater than the contact area between the inner wall of the second guide rod groove 21, the contact area between the guide rod 40 and the inner wall of the first guide rod groove 11 can be increased, and the contact area between the guide rod 40 and the inner wall of the second guide rod groove 21 can be reduced. Among them, increasing the contact area between the inner wall of the first guide rod groove 11 (i.e., the surface treatment layer) and the guide rod 40 can further improve the adhesion between the guide rod 40 and the base 10 and improve the bonding reliability; while reducing the contact area between the guide rod 40 and the inner wall of the second guide rod groove 21 can reduce the friction between the two, reduce the focus power consumption of the drive assembly 30, and improve the sliding smoothness of the lens carrier 20 relative to the base 10.

[0041] Furthermore, please combine Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, the projections of the first guide rod groove 11 and the second guide rod groove 21 along the first direction are both trapezoidal and the long bottom side of the trapezoid is an open side. The guide rod 40 contacts three inner walls of the first guide rod groove 11 and one or two inner walls of the second guide rod groove 21.

[0042] Specifically, refer to Figure 3 as well as Figure 4 The three inner walls of the first guide rod groove 11 are in contact with the guide rod 40, and the two inclined surfaces of the corresponding second guide rod groove 21 are in contact with the guide rod 40, and the guide rod 40 is fully limited by a total of five contact surfaces; Figure 3 as well as Figure 6 The three surfaces of the first guide rod groove 11 are in contact with the guide rod 40 , and the corresponding short bottom side surface of the second guide rod groove 21 is in contact with the guide rod 40 , so that the guide rod 40 is fully limited by a total of three contact surfaces.

[0043] Of course, in some other embodiments, the projections of the first guide rod groove 11 and the second guide rod groove 21 along the first direction may also be other shapes. It should be understood that when the guide rod 40 contacts at least three inner walls of the first guide rod groove 11 and the second guide rod groove 21, the guide rod 40 can be fully limited, wherein the more contact surfaces between the first guide rod groove 11 and the guide rod 40, the stronger the bonding reliability, and the fewer contact surfaces between the second guide rod groove 21 and the guide rod 40, the smaller the sliding friction. In other words, it is only necessary to ensure that both are in contact with the guide rod 40 on at least three sides, and the contact surface between the first guide rod groove 11 and the guide rod 40 is as large as possible, and the contact surface between the second guide rod groove 21 and the guide rod 40 is as small as possible.

[0044] Please refer to Figure 4 As shown, in some embodiments, a limiting groove 211 is provided on the inner wall of the second guide rod groove 21, and the length of the limiting groove 211 along the first direction is smaller than that of the second guide rod groove 21. On the premise of ensuring that the guide rod 40 can contact the inner wall of the second guide rod groove 21 and play a limiting and guiding role, the contact area between the guide rod 40 and the second guide rod groove 21 is reduced to reduce the sliding friction.

[0045] Please refer to Figure 6 As shown, in some embodiments, a limiting protrusion 212 is provided on the inner wall of the second guide rod groove 21, and the length of the limiting protrusion 212 along the first direction is smaller than that of the second guide rod groove 21. The guide rod 40 contacts the limiting protrusion 212 and is slidably connected along the first direction to further reduce the contact area between the guide rod 40 and the second guide rod groove 21 and reduce the sliding friction.

[0046] In some embodiments, the length of the first guide rod groove 11 along the first direction is greater than or equal to the length of the guide rod 40 along the first direction. It should be understood that if the length of the first guide rod groove 11 is less than the guide rod 40, part of the guide rod 40 will protrude from the first guide rod groove 11 along the first direction, and the protruding part of the guide rod 40 cannot be bonded to the first guide rod groove 11. By limiting the length of the first guide rod groove 11 to be greater than or equal to the guide rod 40, it is possible to ensure that the guide rod 40 is completely located in the first guide rod groove 11 along the length direction, thereby increasing the contact area between the guide rod 40 and the inner wall of the first guide rod groove 11 when the length of the guide rod 40 remains unchanged, thereby further improving the bonding reliability.

[0047] Further, in some embodiments, the length of the guide rod 40 along the first direction is greater than the length of the second guide rod groove 21 along the first direction. Since the guide rod 40 is fixed to the base 10, the movement of the lens carrier 20 relative to the base 10 can be regarded as the movement of the inner wall of the second guide rod groove 21 relative to the guide rod 40. It should be understood that the length difference between the second guide rod groove 21 and the guide rod 40 along the first direction is the movement stroke of the lens carrier 20, and by limiting the length of the guide rod 40 to be greater than the second guide rod groove 21, compared with the case where the length of the second guide rod groove 21 is greater than the guide rod 40, under the premise of the same movement stroke, the length of the second guide rod groove 21 is shorter and the thickness of the lens carrier 20 is smaller. In other words, by limiting the length of the guide rod 40 along the first direction to be greater than the length of the second guide rod groove 21 along the first direction, the thickness and weight of the lens carrier 20 can be reduced, thereby reducing the focus power consumption of the drive assembly 30.

[0048] In some embodiments, a gasket is embedded in the inner wall of the first guide rod groove 11 and the second guide rod groove 21. The gasket is made of metal or other high-strength materials to increase the structural strength of the bottom of the first guide rod groove 11 and the second guide rod groove 21, and to prevent the lens drive module from being deformed due to excessive pressure from the guide rod 40 on the bottom of the groove during use. Preferably, the base 10 and the lens carrier 20 are made of plastic, and the gasket is made of metal, and the gasket is integrally formed with the base 10 or the lens carrier 20 through an insert molding process.

[0049] In some embodiments, please refer to Figure 5 As shown, the first guide rod groove 11 forms a bottom wall in the base 10 along the first direction, and the inner side wall and the bottom wall of the first guide rod groove 11 are provided with a surface treatment layer. The guide rod 40 is glued and fixed to the inner side wall and the bottom wall of the first guide rod groove 11. The bottom wall can increase the limitation of the guide rod 40 along the first direction, which is convenient for positioning the guide rod 40 while increasing the bonding area and improving the bonding reliability.

[0050] In some other embodiments, the first guide rod groove 11 penetrates the base 10 along the first direction, the inner wall of the first guide rod groove 11 is provided with a surface treatment layer, and the guide rod 40 is glued and fixed to the inner wall of the first guide rod groove 11, which has a lower thickness requirement for the base 10.

[0051] Please refer to Figure 4 As shown, in some embodiments, the second guide rod groove 21 penetrates the lens carrier 20 along the first direction, so as to facilitate the subsequent insertion of the lens carrier 20 into the base 10 fixed with the guide rod 40, further reducing the difficulty of installation.

[0052] Please combine Figure 2 , Figure 3 as well as Figure 7As shown, in some embodiments, the driving assembly 30 includes a driving magnet 31 and a driving coil 32 arranged opposite to each other, and is used to drive the lens carrier 20 to move along a first direction relative to the base 10. Specifically, a driving magnet slot 22 is provided on the side of the lens carrier 20, the driving magnet 31 is arranged in the driving magnet slot 22, and the driving coil 32 is fixed relative to the base 10 along the first direction, that is, the driving coil 32 and the base 10 will not move relative to each other along the first direction.

[0053] More specifically, the two guide rods 40 and the driving magnet 31 are all located on the same side of the lens carrier 20, and the driving magnet 31 is located between the two guide rods 40. It should be understandable that since the driving magnet 31 is not located at the center of the lens carrier 20, the lens carrier 20 is bound to have a tilting tendency under the action of magnetic force, and the force fulcrum of the tilting tendency is the contact position between the guide rod 40 and the inner wall of the second guide rod groove 21. By arranging the two guide rods 40 and the driving magnet 31 on the same side, the distance between the magnetic force action point and the force fulcrum can be reduced, thereby reducing the possibility of the lens carrier 20 tilting. Furthermore, arranging the driving magnet 31 between the two guide rods 40 can also balance the force conditions of the two force fulcrums, thereby improving the sliding stability of the lens carrier 20.

[0054] In some embodiments, the driving assembly 30 also includes a driving sensing element 33 arranged relative to the driving magnet 31. The driving sensing element 33 is fixed relative to the base 10 along the first direction, and can obtain the magnetic field information of the driving magnet 31, thereby sensing the movement stroke of the lens carrier 20 along the first direction.

[0055] Please combine Figure 1 , Figure 8 as well as Fig. 9 As shown, the second aspect of the present application provides a camera module, including a base 100, a photosensitive module 200, an anti-shake drive module 300, the above-mentioned lens drive module, an optical lens 400 and a housing 500; the optical lens 400 is arranged on the lens carrier 20, and is used to receive and emit light along a first direction; the anti-shake drive module 300 is arranged between the base 100 and the lens drive module, and is configured to drive the base 10 to move relative to the base 100 along a second direction and / or a third direction; the photosensitive module 200 is arranged on the base 100 and is used to receive the light emitted by the optical lens 400 for imaging, so as to obtain an image of the subject: the housing 500 is covered on the base 100.

[0056] The optical lens 400 is held on the light sensing path of the light sensing module 200. The optical lens 400 includes a lens barrel and at least one optical lens installed in the lens barrel. The optical lens has an optical axis O parallel to the first direction (reference Figure 1), the optical axis of the optical lens is also the optical axis of at least one optical lens installed in the lens barrel. At least one optical lens is arranged in the lens barrel along the optical axis, and the photosensitive module 200 is arranged opposite to the optical lens 400 along the optical axis direction.

[0057] The photosensitive module 200 includes a photosensitive chip and an imaging circuit board. The photosensitive chip is used to receive the light reflected by the object collected by the optical lens 400 for imaging, and is electrically connected to other electronic devices through the imaging circuit board. The electronic component can be one or more of passive electronic devices such as resistors and capacitors, or one or more of active electronic devices such as driver chips and storage chips.

[0058] The imaging circuit board has an opening in the middle, and the photosensitive chip can be installed in a sunken manner on the imaging circuit board. Furthermore, the photosensitive chip is installed on the imaging circuit board in a flip-chip manner, and the photosensitive area of ​​the photosensitive chip can be exposed through the opening area of ​​the imaging circuit board.

[0059] The base 100 is formed on the imaging circuit board, and a hole is opened in the middle of the base 100 to expose the photosensitive chip.

[0060] Please refer to Fig. 9 As shown, the anti-shake drive module 300 includes a first anti-shake component 310, a second anti-shake component 320 and a support member 330. The first anti-shake component 310 includes a first anti-shake magnet 310a arranged in the base 10 and a first anti-shake coil 310b arranged relative to the base 100 along a first direction, so as to drive the base 10 to rotate relative to the base 100 around a second direction; the second anti-shake component 320 includes a second anti-shake magnet 320a arranged in the base 10 and a second anti-shake coil 320b arranged relative to the base 100 along a first direction, so as to drive the base 10 to rotate relative to the base 100 around a third direction; the support member 330 is arranged between the base 10 and the base 100 along the first direction, and a fulcrum is formed on the opposite surfaces of the two to support the base 10 to rotate around the fulcrum.

[0061] Specifically, the second anti-shake component 320 and the driving component 30 are arranged on opposite sides of the base 100, and the first anti-shake component 310 is arranged between the second anti-shake component 320 and the driving component 30 and located on one side of the base 100 to fully utilize the space of the base 100.

[0062] Furthermore, the support member 330 includes a first ball 330a, a second ball 330b and a third ball 330c. The first ball 330a is located between the driving assembly 30 and the first anti-shake assembly 310, the second ball 330b is located between the first anti-shake assembly 310 and the second anti-shake assembly 320, and the third ball 330c is located on the side of the second anti-shake assembly 320 away from the second ball 330b. The three balls are all located at the top corners of the base 100.

[0063] Among them, the imaginary line along the third direction passes through the first ball 330a and the second ball 330b, and the first ball 330a and the second ball 330b are arranged on both sides of the first anti-shake component 310 along the imaginary line of the third direction to support the base 10 to move along the third direction when driven by the second anti-shake component 320; the imaginary line along the second direction passes through the second ball 330b and the third ball 330c, and the second ball 330b and the third ball 330c are arranged on both sides of the second anti-shake component 320 along the imaginary line of the second direction to support the base 10 to move along the second direction when driven by the first anti-shake component 310.

[0064] Furthermore, the base 10 is provided with first ball grooves corresponding to each ball, and the base 100 is provided with second ball grooves opposite to each first ball groove along a first direction, and each ball is movably clamped between the first ball groove and the second ball groove.

[0065] In some embodiments, the first anti-shake component 310 also includes a first anti-shake sensing element, which can obtain magnetic field information of the first anti-shake magnet 310a to sense the rotational travel of the base 10 around the second direction; the second anti-shake component 320 also includes a second anti-shake sensing element, which can obtain magnetic field information of the second anti-shake magnet 320a to sense the rotational travel of the base 10 around the third direction.

[0066] In some embodiments, please refer to Fig. 9 A driving circuit board 34 is fixed on the base 100, and the driving coil 32 and the driving sensing element 33 are electrically connected to the driving circuit board 34. Furthermore, a driving circuit board slot 12 corresponding to the driving circuit board 34 is provided through the base 10 to reduce the distance between the driving coil 32 and the driving magnet 31 and improve the driving efficiency.

[0067] Please refer to Fig.10 As shown, the third aspect of the present application provides a driving module installation method, which is applicable to the above-mentioned lens driving module, comprising the following steps: S100. Surface treatment is performed on one of the base or the lens carrier to form a surface treatment layer; S200. Pre-glue the guide rod and glue the guide rod to the surface treatment layer; S300. Exposing the glue to cure the glue; S400. Apply oil to the surface of the guide rod, and slide the base or the lens carrier into connection with the guide rod to complete the installation.

[0068] Specifically, the glue uses UV thermosetting glue, and the use of UV thermosetting glue for pressurized exposure avoids the deformation of plastic parts caused by baking and pressure holding. UV thermosetting glue combines the advantages of ultraviolet curing and thermal curing. It can not only quickly position through ultraviolet rays, but also further enhance the bonding strength through thermal curing.

[0069] More specifically, UV thermosetting adhesive can quickly complete initial curing under ultraviolet light, and further achieve full curing through thermal curing. This fast curing property makes it very suitable for automated production lines, which can significantly improve production efficiency. After curing, UV thermosetting adhesive has high bonding strength, which is suitable for a variety of substrates and can ensure the bonding strength between metals and plastics.

[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A lens driving module, characterized in that: include: Base (10); A lens carrier (20) movably disposed on the base (10) and carrying the optical lens (400); A driving assembly (30) configured to drive the lens carrier (20) to move relative to the base (10) along a first direction parallel to the optical axis of the optical lens (400): A guide rod (40) having an axis arranged along a first direction and located between the lens carrier (20) and the base (10) so as to guide the lens carrier (20) to move relative to the base (10) along the first direction; One of the base (10) and the lens carrier (20) is provided with a surface treatment layer, the roughness of the surface treatment layer being greater than the roughness of other positions of the two, the guide rod (40) being glued and fixed to the surface treatment layer in a radial direction, and being slidably connected to the other in a first direction.

2. The lens driving module according to claim 1, characterized in that: The base (10) has an internal space, and the lens carrier (20) is arranged in the internal space, wherein the base (10) is provided with the surface treatment layer.

3. The lens driving module according to claim 2, characterized in that: The base (10) is provided with a first guide rod groove (11), the lens carrier (20) is provided with a second guide rod groove (21), the first guide rod groove (11) and the second guide rod groove (21) are arranged opposite to each other, the inner wall of the first guide rod groove (11) is provided with the surface treatment layer, and the guide rod (40) is arranged between the first guide rod groove (11) and the second guide rod groove (21) and is slidably connected to the inner wall of the second guide rod groove (21) along a first direction.

4. The lens driving module according to claim 3, characterized in that: The contact area between the inner wall of the first guide rod groove (11) and the guide rod (40) is greater than the contact area between the inner wall of the second guide rod groove (21) and the guide rod (40).

5. The lens driving module according to claim 4, characterized in that: The projections of the first guide rod groove (11) and the second guide rod groove (21) along the first direction are both trapezoidal, and the long bottom side of the trapezoid is an open side; the guide rod (40) is in contact with three inner walls of the first guide rod groove (11), and is in contact with one or two inner walls of the second guide rod groove (21).

6. The lens driving module according to claim 3, characterized in that: The length of the first guide rod groove (11) along the first direction is greater than or equal to the length of the guide rod (40) along the first direction.

7. The lens driving module according to claim 6, characterized in that: The length of the guide rod (40) along the first direction is greater than the length of the second guide rod groove (21) along the first direction.

8. The lens driving module according to claim 3, characterized in that: Gaskets are embedded in the inner walls of the first guide rod groove (11) and the second guide rod groove (21).

9. The lens driving module according to claim 3, characterized in that: The first guide rod groove (11) penetrates the base (10) along a first direction or forms a bottom wall inside the base (10) along the first direction; The second guide rod groove (21) penetrates the lens carrier (20) along a first direction.

10. The lens driving module according to any one of claims 1 to 9, characterized in that: The surface treatment layer is a laser engraving treatment layer.

11. A camera module, characterized in that: It comprises a base (100), a photosensitive module (200), an anti-shake driving module (300), a lens driving module according to any one of claims 1 to 10, an optical lens (400) and a housing (500); The optical lens (400) is arranged on the lens carrier (20) and is used to receive and emit light along a first direction; The anti-shake driving module (300) is arranged between the base (100) and the lens driving module, and is configured to drive the base (10) to move relative to the base (100) along the second direction and / or the third direction; The photosensitive module (200) is arranged on the base (100) and is used to receive the light emitted by the optical lens (400) for imaging: The housing (500) is disposed on the base (100).

12. A method for installing a drive module, applicable to the lens drive module according to any one of claims 1 to 10, characterized in that: The following steps are involved: a. performing a surface treatment on one of the base or the lens carrier to form a surface treatment layer; b. Pre-glue the guide rod and glue the guide rod to the surface treatment layer; c. exposing the glue to light to cure the glue; d. Apply oil to the surface of the guide rod and slide the other of the base or lens carrier onto the guide rod to complete the installation.

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