Lens driving device

Abstract

The invention provides a lens driving device which comprises a shell which comprises a base, an upper cover and a middle hole. The frame is of a rectangular structure when being observed in the optical axis direction and is provided with an accommodating space; the anti-shake supporting piece is used for supporting the frame to move in the direction perpendicular to the optical axis; the lens cone bracket is accommodated in the accommodating space and moves along the optical axis direction, and the lens cone bracket is used for mounting a lens module; the driving assembly is used for driving the lens module to move; the frame comprises a frame body and a cover plate fixed to the frame body. The driving assembly comprises a first driving assembly, and the first driving assembly comprises a first focusing coil fixed on the peripheral side of the lens cone support, a first anti-shake coil fixed on the housing, and a first magnet assembly fixed on the frame. The cover plate is fixed to the side, away from the base, of the first magnet assembly. Compared with the prior art, the structure is good in fixing effect and high in reliability.

Description

Technical Field

[0001] This invention relates to a driving device, and more particularly to a lens driving device. Background Technology

[0002] With the development of camera technology, lens drive devices are widely used in various camera devices. The integration of lens drive devices with various portable electronic devices such as mobile phones, camcorders, and computers is particularly favored by consumers.

[0003] The drive mechanism of the lens drive device described in the related technology is usually composed of a coil and a magnet to form a drive structure. The frame is supported on the base, and the lens barrel support is set in the center hole of the base. The focusing coil (AF coil) and the magnet are respectively fixed on the side of the lens barrel support away from the base and on the frame. The focusing coil is horizontally arranged, with the part between two adjacent magnets being idle. The OIS coil (image stabilization coil) is fixed to the housing and located above the frame. When current is applied to the image stabilization coil, the image stabilization coil and the magnet generate an electromagnetic field. The image stabilization coil is subjected to the Lorentz force of the electromagnetic field, which drives the image stabilization magnet to move in a direction perpendicular to the optical axis, thereby driving the lens barrel to achieve OIS image stabilization performance.

[0004] However, in the lens driving device of the related technology, since the magnet is mounted on the frame, it is easy for the magnet to break when the image stabilization coil drives the magnet to move, resulting in poor reliability.

[0005] Therefore, it is necessary to provide a new lens driving device to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a lens driving device with high overall structural strength and reliability.

[0007] To solve the above-mentioned technical problems, the present invention provides a lens driving device, which includes:

[0008] The housing includes a base, a top cover disposed on the base, and a central hole passing through both the base and the top cover; A frame, which is rectangular in shape when viewed along the optical axis and has a receiving space, is installed inside the housing and can move relative to the base in a direction perpendicular to the optical axis; A shake-stabilizing support is used to support the movement of the frame in a direction perpendicular to the optical axis; A lens barrel support, which is housed within the receiving space and moves along the optical axis, the lens barrel support being used to mount a lens module; and... A driving component, wherein the driving component is used to drive the lens module to move; characterized in that, The frame includes a frame body and a cover plate fixed to the frame body; The drive assembly includes a first drive assembly, which includes a first focusing coil fixed to the outer periphery of the lens barrel bracket, a first image stabilization coil fixed to the housing, and a first magnet assembly fixed to the frame. The cover plate is fixed to the side of the first magnet assembly away from the base.

[0009] Preferably, the frame further includes a metal component, which is embedded and fixed to the frame body, and the portion of the cover plate extending beyond the first magnet assembly abuts against the frame and is fixed to the metal component.

[0010] Preferably, the cover plate includes a cover plate body, a first flange, a second flange, and a third flange formed by bending and extending the cover plate body along the optical axis from the side away from the lens barrel support. The first flange is located between the second flange and the third flange and forms a first notch and a second notch with the second flange and the third flange, respectively. The cover plate body is fixed to the side of the first magnet assembly away from the base, and the first flange, the second flange, and the third flange cover and fix the first magnet assembly to the side away from the lens barrel support.

[0011] Preferably, the first magnet assembly includes a first magnet and a second magnet, which are spaced apart on opposite sides of the first image stabilization coil along the optical axis of the lens drive device, with the first magnet being closer to the base than the second magnet; the orthographic projection of the first focusing coil along the direction perpendicular to the optical axis at least partially falls within the range of the first magnet and the second magnet; the cover plate is glued and fixed to the side of the second magnet away from the base; wherein both the first magnet and the second magnet provide driving magnetic fields for the first image stabilization coil and the first focusing coil; the cover plate body is fixed to the side of the second magnet away from the base, and the first flange, the second flange, and the third flange are covered and fixed to the side of the second magnet away from the lens barrel support.

[0012] Preferably, the first flange is fixed at the middle position of the second magnet, and the second flange and the third flange are fixed at both ends of the second magnet.

[0013] Preferably, the first focusing coil includes a first long side and a second long side arranged at intervals along the optical axis and perpendicular to the optical axis, a first connecting side connecting the first long side and the second long side, and a second connecting side connecting the first long side and the second long side and spaced apart from the first connecting side; the first long side, the first connecting side, the second long side, and the second connecting side are sequentially connected and together form a hollow region; the first long side is directly opposite the first magnet, and the second long side is directly opposite the second magnet; The first image stabilization coil and the first magnet assembly are arranged opposite each other along the optical axis; when the first magnet assembly interacts with the first image stabilization coil, the portion of the first image stabilization coil near the first focusing coil extends into the hollow region.

[0014] Preferably, the cover plate includes a cover plate body, a first flange, a second flange, and a third flange formed by bending and extending the cover plate body along the optical axis from the side away from the lens barrel support, the first flange being located between the second flange and the third flange and forming a first notch and a second notch respectively with the second flange and the third flange; the cover plate body is fixed to the side of the second magnet away from the base, and the first flange, the second flange, and the third flange are covered and fixed to the side of the second magnet away from the lens barrel support; the opposite ends of the cover plate body abut against the frame and are welded and fixed to the metal parts.

[0015] Preferably, the cover plate body and the metal part are fixed by laser welding.

[0016] Preferably, the driving assembly further includes a second driving assembly, and the first driving assembly and the second driving assembly are arranged at intervals along the circumference of the lens barrel support; the second driving assembly includes a second image stabilization coil and a second magnet assembly spaced apart from the second image stabilization coil along the optical axis; the first magnet assembly and the second magnet assembly are respectively disposed on adjacent sides of the frame, the second image stabilization coil is fixed to the outer shell, the first image stabilization coil drives the lens barrel support to move along a first direction, and the second image stabilization coil drives the lens barrel support to move along a second direction, both the first direction and the second direction being perpendicular to the optical axis; The cover plate also includes a connecting portion formed by bending and extending the cover plate body along the first direction. The connecting portion is glued and fixed to the side of the second magnet assembly away from the base. The cover plate body is arranged parallel to the second direction. The cover plate body and the connecting part are integrally formed in an L-shape.

[0017] Preferably, the connecting portion includes a connecting portion body, a fourth flange, a fifth flange, and a sixth flange formed by bending and extending the connecting portion body along the optical axis from the side of the connecting portion body near the lens barrel support, the fourth flange being located between the fifth flange and the sixth flange and forming a third notch and a fourth notch respectively spaced apart from the fifth flange and the sixth flange; the connecting portion body is fixed to the side of the second magnet away from the base, and the fourth flange, the fifth flange, and the sixth flange are covered and fixed to the side of the second magnet assembly near the lens barrel support; the opposite ends of the connecting portion body respectively abut against the frame and are welded and fixed to the metal parts.

[0018] Preferably, the second magnet assembly includes a third magnet and a fourth magnet that are spaced apart on opposite sides of the second image stabilization coil along the optical axis; and the third magnet is closer to the base than the fourth magnet, and the third magnet and the fourth magnet are respectively fixed to the frame; the fourth flange, the fifth flange and the sixth flange are covered and fixed to the side of the fourth magnet near the lens barrel support.

[0019] Preferably, the frame body includes an L-shaped support member, a first mounting portion formed by the support member extending along the first direction, a second mounting portion formed by the support member extending along the second direction, and a third mounting portion; the third mounting portion is located between the first mounting portion and the second mounting portion. The metal components include a first metal component, a second metal component, and a third metal component; the first metal component includes an L-shaped first metal component body that is embedded and fixed to the support component, and a first metal component reinforcing arm that protrudes from the middle position of the first metal component body away from the base and penetrates the support component; the second metal component includes a second metal component body that is embedded and fixed to the first mounting portion and the third mounting portion, and a second metal component reinforcing arm that protrudes from the end of the second metal component body near the first mounting portion away from the base and penetrates the first mounting portion; the third metal component includes a third metal component body that is embedded and fixed to the second mounting portion and the third mounting portion, and two third metal component reinforcing arms that protrude from opposite ends of the third metal component body away from the base and penetrate the second mounting portion and the third mounting portion, respectively; The first drive component is located between the second mounting portion and the third mounting portion, and the second drive component is located between the first mounting portion and the third mounting portion; The two opposite ends of the cover plate body are respectively fixed to the side of the two third metal reinforcing arms away from the base, and the connecting part body is fixed to the side of the second metal reinforcing arm away from the base.

[0020] Preferably, the lens driving device further includes a reinforcing plate, which is fixed to the side of the frame near the lens barrel support; wherein, in the initial state, the side of the lens barrel support near the base abuts against the reinforcing plate.

[0021] Preferably, the first magnet includes a first magnet body and two chamfered first flanges formed by recesses at opposite ends of the first magnet body on the side near the lens barrel support; the gap between the first flanges and the frame is filled with glue for fixation; The second magnet includes a second magnet body and two chamfered second flanges formed by the recesses at opposite ends of the second magnet body on the side near the lens barrel support; the gap between the second flanges and the frame is filled with glue for fixation.

[0022] Preferably, the lens driving device further includes a support plate, the first image stabilization coil is fixed to the side of the support plate near the upper cover, the support plate is integrally formed with the base, and the support plate is bent to form an angle with the base.

[0023] Compared with related technologies, in the lens driving device of the present invention, focusing and image stabilization effects are achieved by driving the lens barrel support to move through a first driving component. The frame has a rectangular structure and a receiving space when viewed along the optical axis. The frame is installed in the housing and can move relative to the base in a direction perpendicular to the optical axis. An image stabilization support is used to support the moving frame in a direction perpendicular to the optical axis. The first driving component includes a first focusing coil fixed to the outer periphery of the lens barrel support, a first image stabilization coil fixed to the housing, and a first magnet assembly fixed to the frame. By fixing the cover plate to the side of the first magnet assembly away from the base, the contact area between the cover plate and the first magnet assembly is increased, the fixing effect on the first magnet assembly is improved, and thus the overall reliability is enhanced. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a three-dimensional structural diagram of the lens driving device provided in an embodiment of the present invention; Figure 2 This is an exploded view of the overall structure of the lens driving device provided in an embodiment of the present invention; Figure 3 For along Figure 1 Cross-sectional view along line AA; Figure 4 This is a schematic diagram of the structure of the metal component of the lens driving device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the frame of the lens driving device provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first focusing coil of the lens driving device provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the drive assembly of the lens drive device provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the first magnet assembly of the lens driving device provided in an embodiment of the present invention; Figure 9 An exploded view of the frame of the lens driving device provided in an embodiment of the present invention; Figure 10 The state of the image stabilization coil of the lens driving device provided in the embodiments of the present invention. Figure 1 ; Figure 11 The state of the image stabilization coil of the lens driving device provided in the embodiments of the present invention. Figure 2 .

[0025] In the diagram, 100 is the lens drive unit, 1 is the housing, 110 is the base, 120 is the top cover, 130 is the central hole, 2 is the frame, 21 is the frame body, 211 is the support member, 212 is the first mounting part, 213 is the second mounting part, 214 is the third mounting part, 22 is the metal part, 221 is the first metal part, 2211 is the first metal part body, 2212 is the first metal part reinforcing arm, 222 is the second metal part, and 2221 is the second metal part. Component body, 2222, second metal reinforcing arm, 223, third metal component, 2231, third metal component body, 2232, third metal reinforcing arm, 3, lens barrel support, 4, conductive component, 5, drive assembly, 51, first drive assembly, 511, first focusing coil, 5111, first long side, 5112, second long side, 5113, first connecting side, 5114, second connecting side, 5115, hollow area, 512, first Anti-shake coil, 513; First magnet assembly, 5131; First magnet, 51311; First magnet body, 51312; First stop, 5132; Second magnet, 51321; Second magnet body, 51322; Second stop, 52; Second drive assembly, 521; Second anti-shake coil, 522; Second magnet assembly, 5221; Third magnet, 5222; Fourth magnet, 7; Guide, 71; Receiving groove, 72; Limiting element. 73. Groove, 8. Ball bearing, 9. Image stabilization support, 9. Cover plate, 91. Cover plate body, 92. First flange, 93. Second flange, 94. Third flange, 95. Connecting part, 951. Connecting part body, 952. Fourth flange, 953. Fifth flange, 954. Sixth flange, 955. Third notch, 956. Fourth notch, 96. First notch, 97. Second notch, 10. Support baffle, 11. Reinforcing plate, 20. Lens module. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-11 As shown, the present invention provides a lens driving device 100, which includes a housing 1, a frame 2, a lens barrel bracket 3, an image stabilization support 8, and a driving component 5.

[0028] The outer casing 1 includes a base 110, an upper cover 120 covering the base 110, and a central hole 130 passing through both the base 110 and the upper cover 120.

[0029] The frame 2 has a rectangular structure and a receiving space when viewed along the optical axis. The frame 2 is installed inside the housing 120 and can move relative to the base 110 in a direction perpendicular to the optical axis. The movement can be sliding or the like.

[0030] The lens barrel support 3 is housed within the housing space and moves along the optical axis. The lens barrel support 3 is used to mount the lens module 20.

[0031] The anti-shake support 8 is used to support the movement of the frame 2 in a direction perpendicular to the optical axis. One end of the anti-shake support 8 is connected to the frame 2, and the other end is connected to the base 110 to achieve the anti-shake support effect. The anti-shake support can be a spring, suspension wire, ball bearing, etc.

[0032] The drive assembly 5 is used to drive the lens module 20 to move. The drive assembly 5 drives the lens module 20 to move in the horizontal and / or vertical directions. For example, when focusing the lens module 20, the drive assembly 5 drives the lens barrel support 3 to move along the optical axis; when stabilizing the lens module 20, the drive assembly 5 drives the lens barrel support 3 to move in the horizontal direction.

[0033] The frame 2 includes a frame body 21 and a cover plate 9 fixed to the frame body 21.

[0034] The driving assembly 5 includes a first driving assembly 51, which includes a first focusing coil 511 fixed to the outer periphery of the lens barrel support 3, a first image stabilization coil 512 fixed to the housing 1, and a first magnet assembly 513 fixed to the frame 2. The lens barrel focusing and image stabilization effects are achieved by the first magnet assembly 513 interacting with the first focusing coil 511 and the first image stabilization coil 512 respectively.

[0035] The cover plate 9 is fixed to the side of the first magnet assembly 513 away from the base 110. By gluing and fixing the cover plate 9 to the side of the first magnet assembly 513 away from the base 110, the structure is strong, the contact area between the cover plate 9 and the first magnet assembly 513 is increased, the fixing effect on the first magnet assembly 513 is improved, and thus the overall reliability is enhanced.

[0036] In this embodiment, the cover plate 9 and the first magnet assembly 513 are fixed by gluing or by high-temperature tinning. This method, by gluing the cover plate 9 to the side of the first magnet assembly 513 away from the base 110, creates a single unit with high structural strength. The portion of the cover plate 9 extending beyond the first magnet assembly 513 abuts against the frame 2 and is welded to the metal part 22, increasing the gluing area between the cover plate 9 and the first magnet assembly 513, improving the fixation effect on the first magnet assembly 513, and thus enhancing overall reliability.

[0037] In this embodiment, the frame 2 further includes a metal component 22, which is embedded and fixed to the frame body 21, saving costs. The portion of the cover plate 9 extending beyond the first magnet assembly 513 abuts against the frame 2 and is fixed to the metal component 22, improving the fixing effect between the metal component 22 and the cover plate 9. The metal component 22 and the cover plate are fixed by welding.

[0038] In this embodiment, the cover plate 9 includes a cover plate body 91, and a first flange 92, a second flange 93, and a third flange 94 formed by bending and extending the cover plate body 91 away from the lens barrel support 3 along the optical axis. The first flange 92 is located between the second flange 93 and the third flange 94 and forms a first notch 96 and a second notch 97 with the second flange 93 and the third flange 94 respectively. The cover plate body 91 is fixed to the side of the first magnet assembly 513 away from the base 110, and the first flange 92, the second flange 93, and the third flange 94 cover and fix the first magnet assembly 513 away from the lens barrel support 3. The opposite ends of the cover plate body 91 abut against the frame 2 and are welded and fixed to the metal part 22. The cover plate body 91 is used to increase the upper surface of the first magnet assembly 513, and the first flange 92 increases the strength and the bonding area. The second flange 93 and the third flange 94 at both ends of the cover plate body 91 can support the lower plastic part, preventing the first magnet assembly 513 from breaking and improving reliability. The first notch 96 and the second notch 97 can realize the deformation area during the reliability process, preventing the first magnet assembly 513 from breaking and further improving reliability.

[0039] In this embodiment, the first magnet assembly 513 includes a first magnet 5131 and a second magnet 5132. The first magnet 5131 and the second magnet 5132 are spaced apart on opposite sides of the first image stabilization coil 512 along the optical axis of the lens driving device 100. The first magnet 5131 is closer to the base 110 than the second magnet 5132. The orthographic projection of the first focusing coil 511 along the direction perpendicular to the optical axis at least partially falls within the range of the first magnet 5131 and the second magnet 5132. The cover plate 9 is glued and fixed to the side of the second magnet 5132 away from the base 110. Both the first magnet 5131 and the second magnet 5132 provide driving magnetic fields for the first image stabilization coil 512 and the first focusing coil 511. The cover plate body 91 is fixed to the side of the second magnet 5132 away from the base, and the first flange 92, the second flange 93, and the third flange 94 are covered and fixed to the side of the second magnet 5132 away from the lens barrel support 3. By using the first magnet assembly 513 as a shared magnetic circuit for the first focusing coil 511 and the first image stabilization coil 512, the installation space of the magnetic circuit can be saved. At the same time, by using the first magnet 5131 and the second magnet 5132 to be installed on opposite sides of the first image stabilization coil 512, the overall magnetic field performance of the first magnet assembly 513 is increased, thereby enhancing the driving force and resulting in good focusing and image stabilization effects of the lens barrel support 3.

[0040] In this embodiment, the first flange 92 is fixed at the middle position of the second magnet 5132, and the second flange 93 and the third flange 94 are fixed at both ends of the second magnet 5132. This improves the fixing effect of the second magnet 5132 and enhances its reliability.

[0041] In this embodiment, the first focusing coil 511 includes a first long side 5111 and a second long side 5112 arranged at intervals along the optical axis and perpendicular to the optical axis, a first connecting side 5113 connecting the first long side 5111 and the second long side 5112, and a second connecting side 5114 connecting the first long side 5111 and the second long side 5112 and spaced apart from the first connecting side 5113; the first long side 5111, the first connecting side 5113, the second long side 5112 and the second connecting side 5114 are sequentially connected and together form a hollow region 5115; the first long side 5111 is directly opposite to the first magnet 5131, and the second long side 5112 is directly opposite to the second magnet 5132.

[0042] The first image stabilization coil 512 and the first magnet assembly 513 are arranged opposite each other along the optical axis. When the first magnet assembly 513 interacts with the first image stabilization coil 512, a portion of the first image stabilization coil 512 near the first focusing coil 511 extends into the hollow region 5115. When the lens barrel support 3 moves horizontally, the first focusing coil 511 and the first image stabilization coil 512 will not collide. Simultaneously, the overall structure is more compact, the product can be miniaturized, and the user experience is better. Optionally, the first image stabilization coil 512 and the first magnet assembly 513 are arranged partially or completely opposite each other along the optical axis. The first magnet assembly 513 is disposed on opposite sides of the first image stabilization coil 512. Specifically, when the first magnet assembly 513 interacts with the first image stabilization coil 512, and the first magnet assembly 513 is driven by the first image stabilization coil 512, the first image stabilization coil 512 enters the hollow region 5115 of the first focusing coil 511. When the first magnet assembly 513 is not driven by the first image stabilization coil 512, part of the first image stabilization coil 512 has entered the hollow region 5115 of the first focusing coil 511, which can also enhance the magnetic field driving force.

[0043] In this embodiment, the cover plate body 91 and the metal part 22 are fixed by laser welding. The fixing effect is good.

[0044] In this embodiment, the driving component 5 further includes a second driving component 52. The first driving component 51 and the second driving component 52 are arranged at intervals along the circumference of the lens barrel support 3. The second driving component 52 includes a second image stabilization coil 521 and a second magnet component 522 spaced apart from the second image stabilization coil 521 along the optical axis. The first magnet component 513 and the second magnet component 522 are respectively disposed on adjacent sides of the frame 2. The second magnet component 522 is fixed to the frame 2, and the second image stabilization coil 521 is fixed to the outer shell 1. The first image stabilization coil 512 drives the lens barrel support 3 to move along a first direction, and the second image stabilization coil 521 drives the lens barrel support 3 to move along a second direction. Both the first direction and the second direction are perpendicular to the optical axis.

[0045] The cover plate 9 further includes a connecting portion 95 formed by bending and extending the cover plate body 91 along the first direction. The connecting portion 95 is glued and fixed to the side of the second magnet assembly 522 away from the base 110, and the cover plate body 91 is arranged parallel to the second direction. The connecting portion 95 can further enhance the gluing and fixing effect of the second magnet assembly 522.

[0046] The cover plate body 91 and the connecting part 95 are integrally molded in an L-shape. This integral molding structure increases the bonding area and enhances reliability.

[0047] In this embodiment, the connecting part 95 includes a connecting part body 951, and a fourth flange 952, a fifth flange 953, and a sixth flange 954 formed by bending and extending the connecting part body 951 along the optical axis direction from the side of the connecting part body 951 near the lens barrel support 3. The fourth flange 952 is located between the fifth flange 953 and the sixth flange 954 and forms a third notch 955 and a fourth notch 956 with the fifth flange 953 and the sixth flange 954 respectively. The connecting part body 951 is fixed to the side of the second magnet 5132 away from the base 110. The fourth flange 952, the fifth flange 953, and the sixth flange 954 cover and are fixed to the side of the second magnet assembly 522 near the lens barrel support 3. The opposite ends of the connecting part body 951 abut against the frame 2 and are welded and fixed to the metal part 22. The connecting body 951 increases the upper surface of the second magnet assembly 522, and the fourth flange 952 increases strength and the bonding area between the second magnet assembly 522 and the connecting body 951. The fifth flange 953 and the sixth flange 954 at both ends of the connecting body 951 support the lower plastic component, preventing the second magnet assembly 522 from breaking and improving reliability. The third notch 955 and the fourth notch 956 create a deformation zone during the reliability process, preventing the second magnet assembly 522 from breaking and further improving reliability.

[0048] In this embodiment, the second magnet assembly 522 includes a third magnet 5221 and a fourth magnet 5222, which are spaced apart on opposite sides of the second image stabilization coil 521 along the optical axis. The third magnet 5221 is closer to the base 110 than the fourth magnet 5222. The third magnet 5221 and the fourth magnet 5222 are respectively fixed to the frame 2. The fourth flange 952, the fifth flange 953, and the sixth flange 954 are fixed to the side of the fourth magnet 5222 near the lens barrel support 3. The first direction is the X-axis direction, and the second direction is the Y-axis direction. The lens barrel support 3 is driven to move along the X-axis and Y-axis directions by the first drive assembly 51 and the second drive assembly 52 respectively, achieving horizontal lens stabilization. By spaced third magnets 5221 and fourth magnets 5222 on opposite sides of the second image stabilization coil 521, the overall magnetic field performance of the third magnets 5221 and fourth magnets 5222 is increased, thereby enhancing the driving force and resulting in good image stabilization of the lens barrel bracket 3. The connecting body 951 is used to increase the upper surface of the fourth magnet 5222, and the fourth flange 952 increases strength and bonding area. The fifth flange 953 and sixth flange 954 at both ends of the connecting body 951 support the lower plastic component, preventing the fourth magnet 5222 from breaking and improving reliability. The third notch 955 and fourth notch 956 create a deformation zone during the reliability process, preventing the fourth magnet 5222 from breaking and further improving reliability.

[0049] In this embodiment, the frame body 21 includes an L-shaped support member 211, a first mounting portion 212 formed by the support member 211 extending along the first direction, a second mounting portion 213 formed by the support member 211 extending along the second direction, and a third mounting portion 214; the third mounting portion 214 is located between the first mounting portion 212 and the second mounting portion 213.

[0050] The metal component 22 includes an L-shaped first metal component 221, a second metal component 222, and a third metal component 223; the first metal component 221 includes an L-shaped first metal component body 2211 embedded and fixed to the support component 211, and a first metal component reinforcing arm 2212 protruding from the middle position of the first metal component body 2211 away from the base 110 and penetrating the support component 211; the second metal component 222 includes a second metal component body 2221 respectively embedded and fixed to the first mounting portion 212 and the third mounting portion 214, and a third metal component reinforcing arm 223. The second metal body 2221 protrudes from one end near the first mounting portion 212, away from the base 110, forming a second metal reinforcing arm 2222 that penetrates the first mounting portion 212; the third metal part 223 includes a third metal body 2231 that is respectively embedded and fixed to the second mounting portion 213 and the third mounting portion 214, and two third metal reinforcing arms 2232 that protrude from the opposite ends of the third metal body 2231, away from the base 110, respectively penetrating the second mounting portion 213 and the third mounting portion 214.

[0051] The first drive assembly 51 is located between the second mounting portion 213 and the third mounting portion 214, and the second drive assembly 52 is located between the first mounting portion 212 and the third mounting portion 214. This facilitates the installation of the first drive assembly 51 and the second drive assembly 52, saving installation space.

[0052] The two ends of the cover plate body 91 are respectively fixed to the side of the two third metal reinforcement arms 2232 away from the base 110, and the connecting body 951 is fixed to the side of the second metal reinforcement arm 2222 away from the base 110.

[0053] In this embodiment, the lens driving device 100 further includes a reinforcing plate 11, which is fixed to the side of the frame 2 near the lens barrel support 3. In the initial state, the side of the lens barrel support 3 near the base 110 abuts against the reinforcing plate 11. The reinforcing plate 11 improves the support of the lens barrel support 3, preventing it from rubbing against the base 110 when image stabilization is needed at the bottom, thus ensuring high reliability. After the first image stabilization coil 512 is energized, the lens support 3 moves along the optical axis, and the reinforcing plate 11 also acts as a limit, preventing the lens barrel support 3 from colliding with the base 110, thus ensuring high safety.

[0054] In this embodiment, the first magnet 5131 includes a first magnet body 51311 and two chamfered first flanges 51312 formed by recesses at opposite ends of the first magnet body 51311 near the lens barrel support 3. The gaps between the first flanges 51312 and the frame 2 are filled with adhesive for fixation. The second magnet 5132 includes a second magnet body 51321 and two chamfered second flanges 51322 formed by recesses at opposite ends of the second magnet body 51321 near the lens barrel support 3. The gaps between the second flanges 51322 and the frame 2 are filled with adhesive for fixation. By fixing the first flanges 51312 and the second flanges 51322 to the frame 2 with adhesive, the fixing and buffering performance of the first magnet 5131 and the second magnet 5132 is improved, thereby enhancing the reliability of the first magnet 5131 and the second magnet 5132. Similarly, the third magnet 5221 and the fourth magnet 5222 are also fixedly connected to the frame 2 by filling glue, which improves the reliability of the third magnet 5221 and the fourth magnet 5222.

[0055] In this embodiment, the lens driving device 100 further includes a guide 7, which is connected between the frame 2 and the lens barrel support 3. The guide 7 is used to move the lens barrel support 3 along the optical axis.

[0056] In this embodiment, the guide member 7 includes a receiving groove 71, a limiting groove 72, and a ball bearing 73. The receiving groove 71 is formed on the outer periphery of the lens barrel support 3, and the limiting groove 72 is formed on the inner periphery of the frame 2. The receiving groove 71 and the limiting groove 72 are arranged opposite to each other. The ball bearing 73 is simultaneously disposed in both the receiving groove 71 and the limiting groove 72, and both the receiving groove 71 and the limiting groove 72 are slidably connected. The receiving groove 71 can accommodate the ball bearing 73, and the corresponding arrangement of the limiting groove 72 and the receiving groove 71 to place the ball bearing 73 can provide good support and guidance.

[0057] In this embodiment, the base 110 and the top cover 120 are laser welded together to enhance overall strength and reliability.

[0058] In this embodiment, the lens driving device 100 further includes a support baffle 10. The first image stabilization coil 512 is fixed to the support baffle 10 near the upper cover 120. The support baffle 10 is integrally formed with the base 110, and the support baffle 10 is bent to form an angle with the base 110, facilitating coil installation. Two support baffles 10 are included, both integrally formed with the base 110. The support baffles 10 are disposed between the upper cover 120 and the frame 2. The support baffle 10 located in the first direction, near the lens barrel support 3, fixes the first image stabilization coil 512. The support baffle 10 located in the second direction, near the lens barrel support 3, fixes the second image stabilization coil 521. The base 110 is equipped with an FPC. The FPC, the first anti-shake coil 512 and the second anti-shake coil 521 are assembled and welded in the horizontal state of the support baffle 10 and then bent. This can prevent the connecting leads of the first anti-shake coil 512 and the second anti-shake coil 521 from interfering with the installation of other components when they are assembled separately, and the assembly is convenient.

[0059] In this embodiment, the lens driving device 100 further includes a conductive element 4, which is fixed to the side of the frame 2 away from the base 110 and is used to supply power to the first focusing coil 511.

[0060] In this embodiment, the installation method of the lens driving device 100 of the present invention is as follows: The base 110, FPC, and support baffle 10 are integrally formed. The anti-shake support 8, the first anti-shake coil 512, and the second anti-shake coil 521 are assembled and welded to the corresponding support baffle 10 while the steel plate is flat. The support baffle 10 is bent to 90° before the mover is assembled; or the mover is assembled first and then bent to form the anti-shake coil assembly. The overall installation effect is good and saves assembly space.

[0061] Compared with related technologies, in the lens driving device of the present invention, focusing and image stabilization effects are achieved by driving the lens barrel support to move through a first driving component. The frame has a rectangular structure and a receiving space when viewed along the optical axis. The frame is installed in the housing and can move relative to the base in a direction perpendicular to the optical axis. An image stabilization support is used to support the moving frame in a direction perpendicular to the optical axis. The first driving component includes a first focusing coil fixed to the outer periphery of the lens barrel support, a first image stabilization coil fixed to the housing, and a first magnet assembly fixed to the frame. By fixing the cover plate to the side of the first magnet assembly away from the base, the contact area between the cover plate and the first magnet assembly is increased, the fixing effect on the first magnet assembly is improved, and thus the overall reliability is enhanced.

[0062] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A lens driving device, comprising: The housing includes a base, a top cover disposed on the base, and a central hole passing through both the base and the top cover; A frame, which is rectangular in shape when viewed along the optical axis and has a receiving space, is installed inside the housing and can move relative to the base in a direction perpendicular to the optical axis; A shake-stabilizing support is used to support the movement of the frame in a direction perpendicular to the optical axis; A lens barrel support, which is housed within the housing space and moves along the optical axis, and is used to mount a lens module; as well as, A driving component, wherein the driving component is used to drive the lens module to move; characterized in that, The frame includes a frame body and a cover plate fixed to the frame body; The drive assembly includes a first drive assembly, which includes a first focusing coil fixed to the outer periphery of the lens barrel bracket, a first image stabilization coil fixed to the housing, and a first magnet assembly fixed to the frame. The cover plate is fixed to the side of the first magnet assembly away from the base.

2. The lens driving device according to claim 1, characterized in that, The frame also includes a metal component, which is embedded and fixed to the frame body. The portion of the cover plate extending beyond the first magnet assembly abuts against the frame and is fixed to the metal component.

3. The lens driving device according to claim 1, characterized in that, The cover plate includes a cover plate body, a first flange, a second flange, and a third flange formed by bending and extending the cover plate body along the optical axis from the side away from the lens barrel support. The first flange is located between the second flange and the third flange and forms a first notch and a second notch with the second flange and the third flange, respectively. The cover plate body is fixed to the side of the first magnet assembly away from the base, and the first flange, the second flange, and the third flange cover and fix the first magnet assembly to the side away from the lens barrel support.

4. The lens driving device according to claim 3, characterized in that, The first magnet assembly includes a first magnet and a second magnet, which are spaced apart along the optical axis on opposite sides of the first image stabilization coil, with the first magnet being closer to the base than the second magnet. The orthographic projection of the first focusing coil along the direction perpendicular to the optical axis at least partially falls within the range of the first magnet and the second magnet. The cover plate is glued and fixed to the side of the second magnet away from the base. Both the first magnet and the second magnet provide driving magnetic fields for the first image stabilization coil and the first focusing coil. The cover plate body is fixed to the side of the second magnet away from the base, and the first flange, the second flange, and the third flange are covered and fixed to the side of the second magnet away from the lens barrel support.

5. The lens driving device according to claim 4, characterized in that, The first flange is fixed at the middle position of the second magnet, and the second flange and the third flange are fixed at both ends of the second magnet.

6. The lens driving device according to claim 4, characterized in that, The first focusing coil includes a first long side and a second long side arranged at intervals along the optical axis and perpendicular to the optical axis, a first connecting side connecting the first long side and the second long side, and a second connecting side connecting the first long side and the second long side and spaced apart from the first connecting side; the first long side, the first connecting side, the second long side, and the second connecting side are sequentially connected and together form a hollow region; the first long side is directly opposite the first magnet, and the second long side is directly opposite the second magnet; The first image stabilization coil and the first magnet assembly are arranged opposite each other along the optical axis; when the first magnet assembly interacts with the first image stabilization coil, the portion of the first image stabilization coil near the first focusing coil extends into the hollow region.

7. The lens driving device according to claim 2, characterized in that, The cover plate body and the metal part are fixed together by laser welding.

8. The lens driving device according to claim 2, characterized in that, The driving assembly further includes a second driving assembly, and the first driving assembly and the second driving assembly are arranged at intervals along the circumference of the lens barrel support; the second driving assembly includes a second image stabilization coil and a second magnet assembly spaced apart from the second image stabilization coil along the optical axis; the first magnet assembly and the second magnet assembly are respectively disposed on adjacent sides of the frame, the second image stabilization coil is fixed to the outer shell, the first image stabilization coil drives the lens barrel support to move along a first direction, and the second image stabilization coil drives the lens barrel support to move along a second direction, both the first direction and the second direction being perpendicular to the optical axis; The cover plate also includes a connecting portion formed by bending and extending the cover plate body along the first direction. The connecting portion is glued and fixed to the side of the second magnet assembly away from the base. The cover plate body is arranged parallel to the second direction. The cover plate body and the connecting part are integrally formed in an L-shape.

9. The lens driving device according to claim 8, characterized in that, The connecting part includes a connecting part body, a fourth flange, a fifth flange, and a sixth flange formed by bending and extending the connecting part body along the optical axis from the side of the connecting part body near the lens barrel support, the fourth flange being located between the fifth flange and the sixth flange and forming a third notch and a fourth notch respectively spaced apart from the fifth flange and the sixth flange; the connecting part body is fixed to the side of the second magnet away from the base, the fourth flange, the fifth flange, and the sixth flange are covered and fixed to the side of the second magnet assembly near the lens barrel support; the opposite ends of the connecting part body abut against the frame and are welded and fixed to the metal parts.

10. The lens driving device according to claim 9, characterized in that, The second magnet assembly includes a third magnet and a fourth magnet that are spaced apart on opposite sides of the second image stabilization coil along the optical axis; the third magnet is closer to the base than the fourth magnet, and the third magnet and the fourth magnet are respectively fixed to the frame; the fourth flange, the fifth flange and the sixth flange are covered and fixed to the side of the fourth magnet near the lens barrel support.

11. The lens driving device according to claim 10, characterized in that, The frame body includes an L-shaped support member, a first mounting portion formed by the support member extending along the first direction, a second mounting portion formed by the support member extending along the second direction, and a third mounting portion; the third mounting portion is located between the first mounting portion and the second mounting portion. The metal components include a first metal component, a second metal component, and a third metal component; the first metal component includes an L-shaped first metal component body that is embedded and fixed to the support component, and a first metal component reinforcing arm that protrudes from the middle position of the first metal component body away from the base and penetrates the support component; the second metal component includes a second metal component body that is embedded and fixed to the first mounting portion and the third mounting portion, and a second metal component reinforcing arm that protrudes from the end of the second metal component body near the first mounting portion away from the base and penetrates the first mounting portion; the third metal component includes a third metal component body that is embedded and fixed to the second mounting portion and the third mounting portion, and two third metal component reinforcing arms that protrude from opposite ends of the third metal component body away from the base and penetrate the second mounting portion and the third mounting portion, respectively; The first drive component is located between the second mounting portion and the third mounting portion, and the second drive component is located between the first mounting portion and the third mounting portion; The two opposite ends of the cover plate body are respectively fixed to the side of the two third metal reinforcing arms away from the base, and the connecting part body is fixed to the side of the second metal reinforcing arm away from the base.

12. The lens driving device according to claim 1, characterized in that, The lens driving device also includes a reinforcing plate, which is fixed to the side of the frame near the lens barrel support; In its initial state, the side of the lens barrel support closest to the base abuts against the reinforcing plate.

13. The lens driving device according to claim 4, characterized in that, The first magnet includes a first magnet body and two chamfered first flanges formed by the recesses at opposite ends of the first magnet body on the side near the lens barrel support; the gap between the first flanges and the frame is filled with glue for fixation; The second magnet includes a second magnet body and two chamfered second flanges formed by the recesses at opposite ends of the second magnet body on the side near the lens barrel support; the gap between the second flanges and the frame is filled with glue for fixation.

14. The lens driving device according to claim 1, characterized in that, The lens driving device also includes a support plate, the first image stabilization coil is fixed to the side of the support plate near the top cover, the support plate is integrally formed with the base, and the support plate is bent to form an angle with the base.

Images