Lens module

Abstract

A lens module, comprising a support base (1), a lens barrel (2) and an adjustment mechanism. The lens barrel (2) is suspended on an inner side of the support base (1). The adjustment mechanism comprises an AF assembly (3), an OIS assembly (4), an elastic piece assembly (5), and a flexible connecting plate (6) arranged below the support base (1). The OIS assembly (4) comprises an OIS circuit board (41) arranged between the support base (1) and the flexible connecting plate (6). A sensor (7) is provided in a central region of the OIS circuit board (41), and the flexible connecting plate (6) comprises a first connecting portion (61) connected to the sensor (7). The lens module has a compact structure and few movable parts, such that the service life thereof can be prolonged and the control precision thereof can be improved. The arrangement of the flexible connecting plate (6) corresponding to the sensor (7) improves a heat dissipation effect of the sensor (7) and improves the strength of the overall elastic structure of the lens module.

Description

A lens module Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to a lens driving module. Background Art

[0002] With the advancement of camera technology, lens modules equipped with autofocus (AF) and optical image stabilization (OIS) have become widely used in electronic devices such as tablets and smartphones. During operation, lens modules generate a certain amount of heat. Existing technologies typically use metal housings to dissipate heat, but this slows the heat dissipation rate, causing the lens module to heat up and reduce performance. Furthermore, existing suspended wire OIS assemblies have a short service life, and the multiple parts mounted on the moving parts directly affect the adjustment accuracy of the lens module's AF and OIS.

[0003] Therefore, it is necessary to provide a lens module with good heat dissipation effect, good adjustment accuracy and long service life. Technical issues

[0004] The object of the present invention is to provide a lens module, which has good heat dissipation effect, better AF and OIS control accuracy and long service life. Technical Solutions

[0005] A lens module includes a support base, a lens barrel, and an adjustment mechanism, wherein the lens barrel is suspended inside the support base; the adjustment mechanism includes an AF assembly, an OIS assembly, a spring assembly, and a flexible connecting plate arranged below the support base; the OIS assembly includes an OIS circuit board arranged between the support base and the flexible connecting plate; a sensor is provided in the central area of ​​the OIS circuit board, and the flexible connecting plate includes a first connecting portion connected to the sensor.

[0006] Preferably, a heat dissipation hole is provided on the first connection part, and a first flexible connection structure is provided in the heat dissipation hole; the flexible connection plate also includes a first frame provided on the periphery of the first connection part, and a second connection part provided between the first frame and the first connection part.

[0007] Preferably, the OIS circuit board is a planar FPC; and the flexible connecting plate is made of titanium-copper alloy material.

[0008] Preferably, the AF component includes an AF coil, an AF magnet and an AF circuit board; the OIS component also includes an OIS magnet and an OIS coil; the support seat is provided with a mounting groove, and the AF magnet, OIS magnet and OIS coil are arranged in the mounting groove from top to bottom; the AF coil is wound around the outer circumference of the lens barrel, and the AF circuit board is arranged on the support seat.

[0009] Preferably, the shrapnel assembly includes a first shrapnel and a second shrapnel respectively provided on the upper and lower surfaces of the lens barrel, and the first shrapnel and the second shrapnel are both connected to the lens barrel and the support base; the shrapnel assembly is respectively connected to the AF circuit board, the OIS assembly and the support base.

[0010] Preferably, the AF magnet is arranged between the lens barrel and the support seat, and the AF magnet is evenly distributed along the circumference of the lens barrel; the lens barrel includes a first connecting ring arranged in the middle area and a cantilever distributed along the circumference of the outer wall of the first connecting ring; the cantilever is arranged corresponding to the four corners of the support seat, and a second flexible connection structure is provided between the cantilever and the support seat.

[0011] Preferably, an avoidance structure is provided on the area of ​​the cantilever close to the support seat.

[0012] Preferably, the OIS magnet and OIS coil are respectively arranged corresponding to the AF magnet, an OIS bracket is provided in the planar area surrounded by the OIS coil, and the OIS bracket is provided on the OIS circuit board; the OIS bracket includes a second connecting ring arranged along the circumference of the sensor, a first contact platform connected to the second connecting ring and arranged corresponding to the OIS coil, and a second contact platform extending from the second connecting ring to the area corresponding to the bottom of the support seat.

[0013] Preferably, the first spring piece and the second spring piece have the same structure, including a third connecting ring connected to the first connecting ring, a first connecting arm connected between the first connecting ring and the support seat, and a second connecting arm connected between the first connecting ring and the cantilever.

[0014] Preferably, the lens module also includes a shell, which includes a first shell arranged outside the support seat and a second shell arranged at the lower part of the first shell and used to accommodate the OIS circuit board and the flexible connecting plate; a gasket is provided between the second shell and the edge area of ​​the flexible connecting plate. Beneficial effects

[0015] The lens module described in the present invention includes the flexible connecting plate, which is arranged below the OIS circuit board and connected to the sensor arranged on the OIS circuit board; when in use, the flexible connecting plate has elasticity and supports the components arranged thereon while providing restoring force for the adjustment of the lens barrel. The flexible connecting plate is used to replace the suspension wire components in the prior art, so that the overall structure of the lens module is more compact, the setting of movable parts is reduced, and the service life and control accuracy of the lens module are improved; in addition, the corresponding setting of the flexible connecting plate and the sensor improves the heat dissipation effect of the sensor, improves the strength of the overall elastic structure of the lens module, improves the durability of the lens module, and extends the service life of the lens module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of a lens module of the present invention;

[0017] FIG2 is a cross-sectional view along line AA in FIG1 ;

[0018] FIG3 is an exploded view of the lens module of the present invention;

[0019] FIG4 is a schematic diagram of the assembly of the flexible connecting plate;

[0020] FIG5 is a schematic structural diagram of a first spring;

[0021] Figure 6 is an enlarged view of point A in Figure 5;

[0022] FIG7 is a schematic structural diagram of an OIS bracket.

[0023] Among them, 1 is the support base, 2 is the lens barrel, 21 is the first connecting ring, 22 is the cantilever, 221 is the avoidance structure, 3 is the AF component, 31 is the AF coil, 32 is the AF magnet, 33 is the AF circuit board, 4 is the OIS component, 41 is the OIS circuit board, 42 is the OIS magnet, 43 is the OIS coil, 44 is the OIS bracket, 441 is the second connecting ring, 442 is the first contact platform, 443 is the second contact platform, 5 is the spring assembly, 51 is the third connecting ring, 52 is the first connecting arm, 53 is the second connecting arm, 6 is the flexible connecting plate, 61 is the first connecting part, 611 is the heat dissipation hole, 62 is the first frame, 63 is the second connecting part, 7 is the sensor, 8 is the shell, 81 is the first shell, 82 is the second shell, and 9 is the gasket. Modes for Carrying Out the Invention

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] As shown in Figures 1 to 3, the lens module of the present invention includes a support base 1, a lens barrel 2 and an adjustment mechanism, wherein the lens barrel 2 is suspended on the inner side of the support base 1; the adjustment mechanism includes an AF component 3, an OIS component 4, a spring component 5, and a flexible connecting plate 6 arranged below the support base 1; the OIS component 4 includes an OIS circuit board 41 arranged between the support base 1 and the flexible connecting plate 6; a sensor 7 is provided on the central area of ​​the OIS circuit board 41, and the flexible connecting plate 6 includes a first connecting portion 61 connected to the sensor 7.

[0026] In this embodiment, the sensor 7 is preferably a sensor of model IMX989.

[0027] The lens module of the present invention includes a flexible connecting plate 6, which is disposed below the OIS circuit board 41 and connected to the sensor 7 disposed on the OIS circuit board 41. During use, the flexible connecting plate 6 is elastic and provides support for the components disposed thereon while also providing a restoring force for adjusting the lens barrel 2. The use of the flexible connecting plate 6 in place of the suspension wire components in the prior art makes the overall structure of the lens module more compact, reduces the number of movable parts, and improves the service life and control accuracy of the lens module. In addition, the corresponding arrangement of the flexible connecting plate 6 and the sensor 7 enhances the heat dissipation effect of the sensor 7, increases the strength of the overall elastic structure of the lens module, improves the durability of the lens module, and extends the service life of the lens module. The improved heat dissipation effect reduces the interference of the increased temperature of the lens module on the shooting effect, reduces image noise, improves image clarity, and ensures image quality.

[0028] As shown in Figure 4, a heat dissipation hole 611 is provided on the first connection part 61, and a first flexible connection structure is provided in the heat dissipation hole 611; the flexible connection plate 6 also includes a first frame 62 provided on the outer periphery of the first connection part 61, and a second connection part 63 provided between the first frame 62 and the first connection part 61.

[0029] The first frame 62 is positioned corresponding to the edge of the OIS circuit board 41. In other embodiments, the flexible connecting plate 6 further includes a reinforcement frame disposed between the first frame 62 and the first connecting portion 61, and a third connecting portion for connecting to the reinforcement frame; the reinforcement frame is disposed circumferentially around the first connecting portion 61. The reinforcement frame enhances the support performance of the flexible connecting plate 6 and improves the overall stability of the lens module.

[0030] Specifically, the OIS circuit board 41 is provided with a first mounting hole for mounting the sensor 7, and the first connecting portion 61 is provided corresponding to the first mounting hole, i.e., the sensor 7 is projected onto the first connecting portion 61. Preferably, the first flexible connecting structure is formed by heat dissipation adhesive filled in the heat dissipation hole 611; the first flexible connecting structure can provide both heat dissipation and damping effects, further improving the stability and control accuracy of the lens module.

[0031] Preferably, the OIS circuit board 41 in this embodiment is a planar FPC (Flexible Printed Circuit board) to reduce the thickness of the OIS circuit board 41; preferably, the flexible connecting plate 6 is made of a titanium-copper alloy material, which has high strength, high elasticity, heat resistance, excellent fatigue resistance and good bending performance, thereby improving the overall strength, recovery performance and fatigue resistance of the lens module, thereby ensuring the stability of the automatic adjustment function of the lens module.

[0032] As shown in Figures 2 and 3, the AF assembly 3 includes an AF coil 31, an AF magnet 32, and an AF circuit board 33; the OIS assembly 4 also includes an OIS magnet 42 and an OIS coil 43. The support base 1 is provided with a mounting slot, the opening of which faces inward, and the AF magnet 32, OIS magnet 42, and OIS coil 43 are arranged in this mounting slot from top to bottom. The AF coil 31 is wound around the outer circumference of the lens barrel 2, and the AF circuit board 33 is mounted on the support base 1. This arrangement fully utilizes the space in the support base, creates a compact overall layout, improves the integrity of the lens module components, and reduces the overall volume of the lens module.

[0033] As shown in Figures 3 and 5, the shrapnel assembly 5 includes a first shrapnel and a second shrapnel respectively provided on the upper and lower surfaces of the lens barrel 2, and the first shrapnel and the second shrapnel are both connected to the lens barrel 2 and the support base 1; the shrapnel assembly 5 is respectively connected to the AF circuit board 33, the OIS assembly 4 and the support base 1 to realize closed-loop control of AF.

[0034] A second mounting hole is formed in the center of the support base 1, the second mounting hole being coaxial with the first mounting hole, and the lens barrel 2 is suspended in the second mounting hole. It should be noted that the upward direction refers to the direction away from the base, and the downward direction refers to the direction toward the base.

[0035] The AF magnets 32 are disposed between the lens barrel 2 and the support base 1 and are evenly distributed along the circumference of the lens barrel 2. There is at least one AF magnet 32, and in this embodiment, preferably four AF magnets 32 are disposed opposite each other in pairs along the outer circumference of the lens barrel 2. The lens barrel 2 includes a first connecting ring 21 disposed in the middle region for mounting a lens, and cantilevers 22 circumferentially distributed along the outer wall of the first connecting ring 21. The cantilevers 22 are disposed corresponding to the four corners of the support base 1, and a second flexible connection structure is disposed between the cantilevers 22 and the support base 1. Preferably, the second flexible connection structure comprises a flexible adhesive structure formed by a damping adhesive filler.

[0036] As shown in Figure 6, an avoidance structure 221 is provided on the cantilever 22 near the support base 1. During use, the avoidance structure 221 provides a clearance space for the cantilever 22 to move relative to the support base 1 when the lens barrel 2 moves up and down along the optical axis, thereby preventing collision between the cantilever 22 and the support base 1 and ensuring the adjustment stability of the lens module.

[0037] In this embodiment, the avoidance structure 221 is a avoidance step, and the avoidance step is provided on the upper surface of the end portion of the cantilever 22 close to the support seat 1 .

[0038] As shown in Figures 2 and 7, the OIS magnet 42 and OIS coil 43 are respectively arranged corresponding to the AF magnet 32. An OIS bracket 44 is provided within the planar area enclosed by the OIS coil 43. The OIS bracket 44 is provided on the OIS circuit board 41. The OIS bracket 44 includes a second connecting ring 441 arranged along the circumference of the sensor 7, a first contact platform 442 connected to the second connecting ring 441 and arranged corresponding to the OIS coil 43, and a second contact platform 443 extending from the second connecting ring 441 to an area corresponding to the bottom of the support base 1. The first contact platform 442 is used to abut against the interior of the OIS coil 43 and prevent the lens barrel 2 from rotating in a plane perpendicular to the optical axis; the second contact platform 443 is used to abut against the bottom of the support base 1.

[0039] As shown in Figure 5, the first spring clip and the second spring clip have the same structure, including a third connecting ring 51 connected to the first connecting ring 21, a first connecting arm 52 connected between the first connecting ring 21 and the support seat 1, and a second connecting arm 53 connected between the first connecting ring 21 and the cantilever 22.

[0040] In some embodiments, the number of the first connecting arms 52 is at least two. In this embodiment, the number of the first connecting arms 52 is four. Multiple first connecting arms 52 are evenly distributed around the periphery of the third connecting ring 51, thereby improving the anti-shake effect and reset stability of the lens module. The number of the second connecting arms 53 is at least one. The first connecting arm 52 is a flexible connecting arm. Preferably, in this embodiment, the first connecting arm 52 is a curved serpentine coiled structure, which can improve the deformation performance, anti-shake reset, and response effects of the first connecting arm 52.

[0041] As shown in Figures 1 to 3, the lens module also includes a shell 8, which includes a first shell 81 arranged outside the support seat 1 and a second shell 82 arranged at the lower part of the first shell 81 and used to accommodate the OIS circuit board 41 and the flexible connecting plate 6; a gasket 9 is provided between the second shell 82 and the edge area of ​​the flexible connecting plate 6.

[0042] The lens assembly further includes a lens disposed on the first connecting ring 21 of the lens barrel 2 .

[0043] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A lens module, characterized in that: It includes a support base, a lens barrel and an adjustment mechanism, wherein the lens barrel is suspended inside the support base; the adjustment mechanism includes an AF component, an OIS component, a spring component, and a flexible connecting plate arranged below the support base; the OIS component includes an OIS circuit board arranged between the support base and the flexible connecting plate; a sensor is provided on the central area of ​​the OIS circuit board, and the flexible connecting plate includes a first connecting portion connected to the sensor.

2. The lens module according to claim 1, characterized in that: The first connection part is provided with a heat dissipation hole, and a first flexible connection structure is provided in the heat dissipation hole; the flexible connection plate also includes a first frame arranged on the periphery of the first connection part, and a second connection part arranged between the first frame and the first connection part.

3. The lens module according to claim 1, characterized in that: The OIS circuit board is a planar FPC; the flexible connecting plate is made of titanium-copper alloy material.

4. The lens module according to claim 1, characterized in that: The AF component includes an AF coil, an AF magnet and an AF circuit board; the OIS component also includes an OIS magnet and an OIS coil; the support seat is provided with a mounting groove, and the AF magnet, OIS magnet and OIS coil are arranged in the mounting groove from top to bottom; the AF coil is wound around the outer periphery of the lens barrel, and the AF circuit board is arranged on the support seat.

5. The lens module according to claim 4, characterized in that: The shrapnel assembly includes a first shrapnel and a second shrapnel respectively arranged on the upper and lower surfaces of the lens barrel, and the first shrapnel and the second shrapnel are both connected to the lens barrel and the support seat; the shrapnel assembly is respectively connected to the AF circuit board, the OIS assembly and the support seat.

6. The lens module according to claim 5, characterized in that: The AF magnetic steel is arranged between the lens barrel and the support seat, and the AF magnetic steel is evenly distributed along the circumference of the lens barrel; the lens barrel includes a first connecting ring arranged in the middle area and a cantilever distributed along the circumference on the outer wall of the first connecting ring; the cantilever is arranged corresponding to the four corners of the support seat, and a second flexible connection structure is provided between the cantilever and the support seat.

7. The lens module according to claim 6, characterized in that: An avoidance structure is provided on the area of ​​the cantilever close to the support seat.

8. The lens module according to claim 6, characterized in that: The OIS magnet and the OIS coil are respectively arranged corresponding to the AF magnet, an OIS bracket is provided in the plane area surrounded by the OIS coil, and the OIS bracket is arranged on the OIS circuit board; the OIS bracket includes a second connecting ring arranged along the circumference of the sensor, a first contact platform connected to the second connecting ring and arranged corresponding to the OIS coil, and a second contact platform extending from the second connecting ring to the area corresponding to the bottom of the support seat.

9. The lens module according to claim 6, characterized in that: The first spring piece and the second spring piece have the same structure, including a third connecting ring connected to the first connecting ring, a first connecting arm connected between the first connecting ring and the supporting seat, and a second connecting arm connected between the first connecting ring and the cantilever.

10. The lens module according to claim 1, characterized in that: The lens module also includes a shell, which includes a first shell arranged outside the support seat and a second shell arranged at the lower part of the first shell and used to accommodate the OIS circuit board and the flexible connecting board; a gasket is provided between the second shell and the edge area of ​​the flexible connecting board.

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