Aperture conduction mechanism of lens driving device, lens driving device and camera module

Abstract

The invention relates to an aperture conduction mechanism of a lens driving device, the lens driving device and a camera module, the lens driving device comprises a base and a movable frame piece which is arranged on the base and moves in a plane perpendicular to an optical axis, and the aperture-variable low-rigidity conduction mechanism further comprises a power supply circuit, the power supply circuit is fixed on the base; and at least part of the aperture conductive spring is electrically connected with the power supply circuit, and at least part of the rest of the aperture conductive spring is fixed on the movable frame piece so as to be used for supplying power to an aperture fixed on the movable frame piece. The variable aperture mechanism has the advantages that the variable aperture mechanism conductive spring with low rigidity and degree of freedom in three directions is utilized, so that the movable frame part can stably provide an aperture power supply effect when the position is adjusted, and the service life of a product is prolonged.

Description

Technical Field

[0001] This application belongs to the technical field of electronic imaging, and particularly relates to a diaphragm conduction mechanism of a lens driving device, a lens driving device, and an imaging module. Background Art

[0002] Currently, large-bottom and large-pixel OISs all need to be equipped with variable apertures. Among them, whether it is an open-loop or closed-loop variable aperture, there are problems with wire routing. Currently, according to wire routing, it is generally divided into a split type (the variable aperture circuit exports the wire to the module through an additional bracket on the housing) and an integrated type (the variable aperture is placed on the carrier lens and actuates together). Among them, the integrated variable aperture is currently commonly used in the logical architecture where the AF motor is built-in and the OIS motor is external. Because the AF built-in itself requires wire conduction through the shrapnel base; however, there is currently no feasible solution for the structure where the AF is external and the OIS is internal.

[0003] In Patent CN 115437095 A, a lens module and an electronic device are disclosed. The lens module includes a base, a driving base, a lens structure, and a supporting component. The supporting component includes a first elastic supporting element and a second elastic supporting element. The first elastic supporting element connects the base and the driving base so that the driving base can be suspended on the base, and the second elastic supporting element connects the driving base and the lens structure so that the lens structure can be suspended on the driving base. In the above lens module, the first elastic supporting element and the second elastic supporting element can effectively support and limit the driving base and the lens structure, which is beneficial to improving the operation stability of the lens module.

[0004] In the above patent, the components external to the aperture structure and the module are connected in a rigid manner, which is not easy to adjust the aperture state. At the same time, in the case of external interference, the rigid connection is easily damaged, and the service life of the components is short. Summary of the Invention

[0005] The object of the present invention is to solve the above problems by providing a diaphragm conduction mechanism of a lens driving device, a lens driving device, and an imaging module that can solve the above technical problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A diaphragm conduction mechanism of a lens driving device. The lens driving device includes a base and a moving frame member disposed on the base and moving in a plane perpendicular to the optical axis. The variable aperture low-rigidity conduction mechanism further includes:

[0008] A power supply circuit fixed on the base;

[0009] An aperture conductive spring, at least part of the aperture conductive spring is electrically connected to the power supply circuit, and at least part of the remaining aperture conductive spring is fixed to the moving frame member for supplying power to the aperture fixed to the moving frame member.

[0010] Further, the aperture conductive spring is vertically distributed with respect to the optical axis.

[0011] Further, the aperture conductive spring includes a first anti-torsion portion distributed along a first axis, and a second anti-torsion portion connected to the first anti-torsion portion and distributed along a second axis.

[0012] Further, there are multiple aperture conductive springs and they are on the same side of the outer peripheral surface of the moving frame member.

[0013] Further, at least part of the power supply circuit extends to one side of the outer peripheral surface of the moving frame member.

[0014] Further, an embedded conductive member connected to each aperture conductive spring is provided on the power supply circuit, and the embedded conductive member is embedded and fixed in the base.

[0015] Further, an outer conductive terminal electrically connected to the embedded conductive member is provided on the aperture conductive spring, and an inner conductive terminal fixed to the top surface of the moving frame member is also provided on the aperture conductive spring.

[0016] The present application also provides a lens driving device, including a base, a first moving frame moving in the optical axis direction, and a moving frame member provided on the first moving frame and moving in a plane perpendicular to the optical axis. The lens driving device includes the aperture conduction mechanism of the lens driving device.

[0017] Further, the first moving frame and the base are slidably connected through a guide shaft axially distributed along the optical axis. The moving frame member includes a second moving frame and a third moving frame. The second moving frame is axially slidably connected to the first moving frame along the first axis, and the second moving frame is axially slidably connected to the third moving frame along the second axis.

[0018] The present application also provides an imaging module, and the imaging module includes the lens driving device described above.

[0019] Compared with the prior art, the advantages of the present application are as follows: The present application uses an aperture conductive spring with low rigidity and degrees of freedom in three directions, so that when the moving frame member adjusts its position, it can stably provide the function of supplying power to the aperture, thereby improving the service life of the product. Description of the Drawings

[0020] Figure 1 It is an assembly drawing of the main structure of the present invention;

[0021] Figure 2 For Figure 1 Enlarged perspective view of the structural details of area A in

[0022] Figure 3 Exploded view of the structure of the main body of the present invention in the direction of the optical axis;

[0023] Figure 4 Structural diagram of the main body of the aperture conductive spring of the present invention;

[0024] Figure 5 Exemplary appearance layout diagram of the electronic device in Embodiment 3 of the present invention.

[0025] In the figure, there are base 1, power supply circuit 10, embedded conductive member 11, moving frame member 2, guide shaft 20, second moving frame 21, third moving frame 22, aperture conductive spring 3, first anti-torsion portion 30, second anti-torsion portion 31, outer conductive terminal 32, inner conductive terminal 33, first moving frame 4, first axis Y, second axis X, and optical axis Z. Detailed implementation manners

[0026] The following are specific embodiments of the present invention in combination with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0027] Embodiment 1

[0028] The aperture conduction mechanism of the lens driving device. The lens driving device includes a base 1 and a moving frame member 2 disposed on the base 1 and moving in a plane perpendicular to the optical axis Z. The variable aperture low-rigidity conduction mechanism further includes:

[0029] A power supply circuit 10, which is fixed on the base 1;

[0030] An aperture conductive spring 3, at least a part of the aperture conductive spring 3 is electrically connected to the power supply circuit 10, and at least a part of the remaining aperture conductive spring 3 is fixed on the moving frame member 2 for supplying power to the variable aperture mechanism fixed on the moving frame member 2.

[0031] The aperture conductive spring 3 has low rigidity and freedom in three directions, and the aperture conductive spring 3 can overcome the reaction forces generated when the carrier and the base move relative to each other in three directions.

[0032] The aperture conductive spring 3 is vertically distributed with respect to the optical axis Z.

[0033] The part of the aperture conductive spring 3 between the moving frame member 2 and the base 1 is designed to be bent. The advantage is that the aperture conductive spring 3 can be stretched and contracted in three directions.

[0034] The aperture conductive spring 3 includes a first anti-torsion portion 30 distributed along the first axis Y and a second anti-torsion portion 31 connected to the first anti-torsion portion 30 and distributed along the second axis X.

[0035] The first anti-torsion part 30 and the second anti-torsion part 31 respectively counteract the driving reaction forces of the first shaft and the second shaft, and while deforming, they provide stable power supply for the device.

[0036] There are at least two aperture conductive reeds 3 and they are on the same side of the outer peripheral surface of the moving frame member 2.

[0037] The two aperture conductive reeds 3 can supply power to the variable aperture mechanism and at the same time form a current loop.

[0038] At least part of the power supply circuit 10 extends to one side of the outer peripheral surface of the moving frame member 2.

[0039] The power supply circuit 10 provides power support for the internal electrical components of the device. The fact that part of the power supply circuit 10 extends to one side of the outer peripheral surface of the moving frame member 2 is more conducive to connecting the lines.

[0040] The power supply circuit 10 includes an embedded conductive member 11 connected to each aperture conductive reed 3, and the embedded conductive member 11 is embedded and fixed in the base 1.

[0041] The function of the embedded conductive member 11 is to connect the power supply circuit 10 and the aperture conductive reed 3 at different positions. At the same time, the embedded conductive member 11 can strengthen the structure of the base 1 and improve the service life of the device.

[0042] In this embodiment, the power supply circuit 10 further includes a flexible circuit board. The flexible circuit board is fixed on the outer peripheral wall of the base 1 parallel to the Z-axis direction and is located on the outer peripheral side of the moving frame member 2. The flexible circuit board is electrically connected to one end of the embedded conductive member 11 away from the aperture conductive reed 3. In other embodiments, the power supply circuit 10 includes an embedded conductive member 11, and both ends of the embedded conductive member 11 are respectively exposed at different positions on the wall of the base 1. One of the exposed ends is connected to an external circuit, and the other end is electrically connected to the aperture conductive reed 3. Or the power supply circuit 10 can also include exposed terminals and be electrically connected to one end of the embedded conductive member 11 away from the aperture conductive reed 3. Of course, the power supply circuit 10 can also be a rigid circuit board fixed on the base 1.

[0043] An external conductive terminal 32 electrically connected to the embedded conductive member 11 is provided on the aperture conductive reed 3. An internal conductive terminal 33 fixed on the top surface of the moving frame member 2 is also provided on the aperture conductive reed 3. The top surface of the moving frame member 2 is the top surface of the moving frame member 2 along the Z-axis direction.

[0044] The external conductive terminal 32 is fixedly connected to the embedded conductive member 11, and the internal conductive terminal 33 is fixedly connected to the top surface of the moving frame member 2. The electrical signal or current flows from the external conductive terminal 32 to the internal conductive terminal 33 and flows out of the external conductive terminal 32 from the internal conductive terminal 33.

[0045] Embodiment Two

[0046] The structure and principle of this embodiment are basically the same as those of the first embodiment. The different structure lies in that for the aperture conduction mechanism of the lens driving device in the first embodiment above, the lens driving device of this embodiment includes the aperture conduction mechanism of the lens driving device, a base 1, a first moving frame 4 that moves in the optical axis direction, and a moving frame member 2 that is provided on the first moving frame 4 and moves in a plane perpendicular to the optical axis Z.

[0047] The variable aperture mechanism can be arranged on the moving frame member 2 and is powered through an aperture conductive spring 3.

[0048] The first moving frame 4 and the base 1 are slidably connected through a guide shaft 20 axially distributed along the optical axis Z. The moving frame member 2 includes a second moving frame 21 and a third moving frame 22. The second moving frame 21 is axially slidably connected to the first moving frame 4 in the axial direction of the first axis Y, and the second moving frame 21 is axially slidably connected to the third moving frame 22 in the axial direction of the second axis X.

[0049] Drive mechanisms are provided on both the base 1, the first moving frame 4, and the moving frame member 2. The drive mechanism can be an electromagnetic drive mechanism. The electromagnetic drive mechanism includes a coil provided on the outer peripheral wall of the base 1, a focusing magnet provided on the first moving frame 4, and an anti-shake magnet provided on the moving frame member 2. The coil is electrically connected to a power supply circuit 10. One of the coils and the focusing magnet are arranged opposite to each other and drive the first moving frame 4 to move along the optical axis direction. There are two anti-shake magnets and each corresponds to a coil, so as to be able to drive the moving frame member 2 to perform anti-shake movement along two directions of the X and Y axes.

[0050] The three moving frames and the base 1 are slidably connected by using the guide shaft 20 therebetween to achieve the anti-shake effect and the focusing effect of the entire device.

[0051] Embodiment III

[0052] A camera module, which includes the lens driving device of Embodiment II.

[0053] The camera module is used in an electronic device, including 3C products such as a computer, a mobile smart phone, and a digital camera. In this embodiment, the module is used as a camera imaging component of a mobile smart phone.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. Aperture conduction mechanism of a lens driving device, the lens driving device comprising a base (1) and a movable frame member (2) provided on the base (1) and moving in a plane perpendicular to the optical axis (Z), characterized in that, The variable aperture low-rigidity conduction mechanism further includes: A power supply circuit (10), which is fixed on the base (1); An aperture conductive spring (3), at least part of the aperture conductive spring (3) is electrically connected to the power supply circuit (10), and at least part of the remaining aperture conductive spring (3) is fixed on the moving frame member (2) for supplying power to the variable aperture mechanism fixed on the moving frame member (2).

2. The aperture conduction mechanism of the lens driving device according to claim 1, characterized in that, The aperture conductive spring (3) is perpendicularly distributed with respect to the optical axis (Z).

3. The aperture conduction mechanism of the lens driving device according to claim 1 or 2, characterized in that, The aperture conductive spring (3) includes a first anti-torsion portion (30) distributed along the first axis (Y), and a second anti-torsion portion (31) connected to the first anti-torsion portion (30) and distributed along the second axis (X).

4. The aperture conduction mechanism of the lens driving device according to claim 1, wherein There are multiple aperture conductive springs (3) and they are on the same side of the outer peripheral surface of the moving frame member (2).

5. The aperture conduction mechanism of the lens driving device according to claim 4, wherein At least part of the power supply circuit (10) extends to one side of the outer peripheral surface of the moving frame member (2).

6. The aperture conduction mechanism of the lens driving device according to claim 1, characterized in that The power supply circuit (10) includes an embedded conductive member (11) connected to the aperture conductive spring (3), and the embedded conductive member (11) is embedded and fixed in the base (1).

7. The aperture conduction mechanism of the lens driving device according to claim 6, characterized in that, An outer conductive terminal (32) electrically connected to the embedded conductive member (11) is provided on the aperture conductive spring (3), and an inner conductive terminal (33) fixed on the top surface of the moving frame member (2) is also provided on the aperture conductive spring (3).

8. A lens driving device, comprising a base (1), a first movable frame (4) that moves in the optical axis direction, and a movable frame member (2) provided on the first movable frame (4) and moving in a plane perpendicular to the optical axis (Z), characterized in that, The lens driving device includes the aperture conduction mechanism of the lens driving device according to any one of claims 1-7.

9. The lens driving device according to claim 8, wherein The first moving frame (4) and the base (1) are slidably connected through a guide shaft (20) axially distributed along the optical axis (Z). The moving frame member (2) includes a second moving frame (21) and a third moving frame (22). The second moving frame (21) is axially slidably connected to the first moving frame (4) along the first axis (Y), and the second moving frame (21) is axially slidably connected to the third moving frame (22) along the second axis (X).

10. The camera module is characterized in that, The imaging module includes the lens driving device according to any one of claims 8-9.

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