Optical element driving device, camera device and mobile terminal

Abstract

The present invention provides an optical element driving device, a camera device and a mobile terminal. The optical element driving device includes a housing and a base, wherein the housing cover is arranged on the base and forms an accommodating space with the base, and the optical element driving device also includes: a bearing seat arranged in the accommodating space, wherein the bearing seat is movably arranged inside the accommodating space; and a driving assembly arranged between the bearing seat and the base, wherein the driving assembly includes a plurality of telescopic arms, wherein the telescopic arms have movable ends, wherein the movable ends of the telescopic arms are slidably connected to the bearing seat, and when the driving assembly is powered on, the movable ends of the telescopic arms slide relative to the base and change the contact position with the bearing seat, so that the bearing seat moves along the Z-axis direction or deflects relative to the Z-axis. The present invention solves the problem of poor performance of the driving device of the camera device in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of camera devices, and in particular to an optical element driving device, a camera device and a mobile terminal. Background Art

[0002] Video cameras or cameras usually use lenses with adjustable focal length or automatic focus, and the adjustment process is to change the position of the lens or image sensor. A drive motor is usually used to drive the lens and image sensor to move. At present, the automatic focus of handheld camera devices, especially mobile phone cameras, is basically all completed using voice coil motors (VCM). Voice coil motors are a system composed of coils and magnets. After the power is turned on, the coil will be subjected to electromagnetic force in the magnetic field. Due to the action of the electromagnetic force, the winding carrier is driven to move in a straight line along the optical axis of the lens (i.e., the Z axis). The winding carrier finally stops at the position where the electromagnetic force generated between the annular coil and the driving magnet and the elastic force of the upper spring and the lower spring reach a state of equilibrium.

[0003] Although voice coil motors have the advantages of mature technology, low cost, and low noise, as the requirements for camera devices increase, voice coil motors have problems such as magnetic interference, insufficient thrust, and unstable structure and performance. For example: dual-camera motors have been developed and applied to various mid-to-high-end mobile phones, but there are certain troubles and difficulties in actual application. In particular, there is a certain degree of magnetic interference between the two dual-camera motors, which affects the normal performance of the dual-camera motor. Voice coil motors cannot avoid this defect. At the same time, various improvement schemes are likely to cause the motor structure to be complicated and the difficulty of the assembly process to increase. The electrical conduction and connection assembly between the various components in the voice coil motor are achieved through welding, hot riveting, and gluing. At the same time, the coil needs to be energized through the upper / lower springs, resulting in a longer path for the coil to be energized. Since the voice coil motor has a large number of parts, it requires more welding, hot riveting, and gluing. Once the mobile phone is subjected to external forces such as falling and impact, the motor is easily pulled off or the spring deformed due to external force vibrations. Ultimately, the electrical performance and combined structure inside the motor are damaged, affecting the normal performance of the motor and bringing adverse consequences to the shooting effect.

[0004] Therefore, there is a problem in the prior art that the driving device of the camera device has poor performance. Summary of the invention

[0005] The main purpose of the present invention is to provide an optical element driving device, a camera device and a mobile terminal to solve the problem of poor performance of the driving device of the camera device in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an optical element driving device, including a shell and a base, wherein the shell cover is arranged on the base and forms an accommodating space with the base, and the optical element driving device also includes: a supporting seat arranged in the accommodating space, the supporting seat is movably arranged inside the accommodating space; a driving component, the driving component is arranged between the supporting seat and the base, the driving component includes a plurality of telescopic arms, the telescopic arms have movable ends, the movable ends of the telescopic arms are slidably connected with the supporting seat, when the driving component is energized, the movable ends of the telescopic arms slide relative to the base and change the contact position with the supporting seat, so that the supporting seat moves along the Z-axis direction or deflects relative to the Z-axis.

[0007] Furthermore, each side of the bearing seat corresponds to at least one telescopic arm, and when the driving assembly is powered on, the telescopic arm moves along the corresponding side of the bearing seat.

[0008] Furthermore, when the drive assembly is powered on, the different telescopic arms only move in the X-axis and / or Y-axis directions.

[0009] Furthermore, the supporting seat has a plurality of abutment protrusions on one side corresponding to the telescopic arm, each abutment protrusion is slidably connected to the movable end of at least one telescopic arm, and the abutment protrusion has an abutment surface corresponding to the telescopic arm. When the telescopic arm moves relative to the base, the movable end of the telescopic arm slides along the abutment surface.

[0010] Furthermore, in the movement direction of the movable end of the telescopic arm, the abutting surface is inclined relative to the body of the bearing seat, and an angle between the abutting surface and the Z-axis direction is greater than 0 degrees and less than 90 degrees.

[0011] Furthermore, the movable end of the telescopic arm has a supporting surface parallel to the abutting surface, and at least a portion of the supporting surface contacts the abutting surface, so that when the telescopic arm moves, the supporting surface slides along the abutting surface.

[0012] Furthermore, the distance between the abutting surface and the body of the bearing seat gradually increases in a direction away from the corner of the body of the bearing seat.

[0013] Furthermore, the abutting surface has a slide groove extending along the movement direction of the telescopic arm, and at least a part of the movable end of the telescopic arm extends into the slide groove. When the telescopic arm moves relative to the base, the part of the movable end of the telescopic arm extending into the slide groove moves along the slide groove.

[0014] Further, each side of the bearing seat is correspondingly provided with an abutting protrusion, the abutting protrusion is correspondingly provided at one end of the corresponding side, and the corner formed by two adjacent side edges has only one abutting protrusion.

[0015] Furthermore, each side of the bearing seat is respectively provided with a telescopic arm, the extension direction of the telescopic arm is the same as the extension direction of the corresponding side, and different telescopic arms extend toward different corners of the body of the bearing seat.

[0016] Furthermore, the driving assembly includes: a telescopic spring, which has multiple telescopic arms; an FPC board, which is arranged on the base, and the telescopic spring is arranged between the FPC board and the bearing seat and is electrically connected to the FPC board; and an SMA wire, which is multiple, each telescopic arm corresponds to at least one SMA wire, one end of the SMA wire is connected to the movable end of the telescopic arm, and the other end of the SMA wire is connected to the FPC board or the base. When the SMA wire is energized, the SMA wire contracts and drives the telescopic arm to move relative to the base.

[0017] Furthermore, the driving assembly also includes a plurality of claws, one end of the SMA wire is connected to the movable end of the telescopic arm through the claw, and the other end of the SMA wire is connected to the FPC board or the base through the claw.

[0018] Furthermore, the telescopic spring includes a main body, which is arranged on the FPC board, the main body is annular, and one end of the telescopic arm is connected to the outer periphery of the main body, and the other end of the telescopic arm is a movable end and can move relative to the main body.

[0019] Furthermore, the telescopic arm comprises a connecting section, a compression section and a supporting section which are connected in sequence, one end of the connecting section away from the compression section is connected to the main body, and one end of the supporting section away from the compression section is a movable end.

[0020] Furthermore, the connecting section is tangent to the outer periphery of the main body.

[0021] Furthermore, the movable end has a mounting plane, and a supporting protrusion extending toward the bearing seat is arranged on the mounting plane, and the supporting protrusion is slidably connected to the bearing seat.

[0022] Furthermore, a side of the supporting protrusion facing the bearing seat has a supporting surface or an arc-shaped surface.

[0023] Furthermore, each corner of the base has at least one positioning column extending toward the bearing seat, the positioning column has a lap surface, the corner of the bearing seat is overlapped on the lap surface, and the lap surface has a limiting protrusion, and the bearing seat has a limiting notch that cooperates with the limiting protrusion.

[0024] Furthermore, the optical element driving device also includes a pressing plate, which is arranged on a side of the bearing seat away from the driving assembly and connected to the top of the limiting protrusion to provide a restoring force for the bearing seat toward the driving assembly.

[0025] Further, a side of the bearing seat away from the driving assembly has a plurality of mounting protrusions; and / or an edge of a side of the bearing seat away from the driving assembly has a limiting wall.

[0026] According to another aspect of the present invention, there is provided an imaging device, the imaging device comprising the above-mentioned optical element driving device.

[0027] According to another aspect of the present invention, a mobile terminal is provided. The mobile terminal includes the above-mentioned camera device.

[0028] Applying the technical solution of the present invention, the optical element driving device in the present application includes a housing and a base, the housing cover is arranged on the base and forms an accommodating space with the base, and the optical element driving device also includes a bearing seat and a driving assembly arranged in the accommodating space. The bearing seat is movably arranged inside the accommodating space; the driving assembly is arranged between the bearing seat and the base, and the driving assembly includes a plurality of telescopic arms, the telescopic arms have movable ends, and the movable ends of the telescopic arms are slidably connected with the bearing seat. When the driving assembly is powered on, the movable ends of the telescopic arms slide relative to the base and change the contact position with the bearing seat, so that the bearing seat moves along the Z-axis direction or deflects relative to the Z-axis.

[0029] When the optical element driving device in the present application is used, the optical element in the camera module is installed on the bearing seat, and because when the driving component is powered on, the movable end of the telescopic arm slides relative to the base and changes the contact position with the bearing seat, so that the bearing seat moves along the Z axis or deflects relative to the Z axis, the automatic focusing function or anti-shake function of the optical element driving device can be realized through the movement of the telescopic arm. When the movement distances of multiple telescopic arms are the same, the multiple telescopic arms can drive the bearing seat to move along the Z axis and realize AF drive. When the movement distances of multiple telescopic arms are different, the axis shift anti-shake function of the lens can be realized. That is to say, in the present application, the driving coil, the driving magnet part and the suspension wire anti-shake part in the original voice coil motor are replaced by the driving component of the optical element driving device. In addition, since the spring and other structures that cooperate with the driving magnet and the driving coil are no longer required in the present application, the optical element driving device in the present application is simpler in structure than the existing voice coil motor. At the same time, there is no magnet, so there will be no internal or external magnetic interference problems. Furthermore, the optical element driving device in the present application does not have any magnetic circuit design problems, and the average thrust of the entire stroke is greater than that of the electromagnetic method, so it is more efficient than the existing voice coil motor. Furthermore, there is no upper and lower spring design of the voice coil motor, and there will be no problems with spring deformation, nickel or foreign matter falling off in tests such as drops and rollers. Therefore, the optical element driving device in the present application effectively solves the problem of poor performance of the driving device of the camera device in the prior art. Furthermore, in the present application, when the movable end of the telescopic arm slides relative to the base and changes the contact position with the bearing seat, the telescopic arm moves in the XY axis direction, which reduces the movement requirements of the drive component in the Z axis direction, thereby making the optical element driving device thinner and lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 A schematic structural diagram of an optical element driving device according to a specific embodiment of the present invention is shown;

[0032] Figure 2 Shows Figure 1 An exploded view of the optical element drive device in FIG.

[0033] Figure 3 A schematic diagram showing the positional relationship between a base, a bearing seat and a pressing plate of an optical element driving device in a specific embodiment of the present application is shown;

[0034] Figure 4 A schematic diagram showing the structure of a driving assembly of an optical element driving device in a specific embodiment of the present application is shown;

[0035] Figure 5 A schematic structural diagram of a supporting base of an optical element driving device in a specific embodiment of the present application is shown;

[0036] Figure 6 A schematic structural diagram of a supporting base of an optical element driving device in another specific embodiment of the present application is shown;

[0037] Figure 7 Shows Figure 5 A schematic diagram of the positional relationship between the abutment surface of the bearing seat and the movable end;

[0038] Figure 8 Shows Figure 6 A schematic diagram of the positional relationship between the abutment surface of the bearing seat and the movable end;

[0039] Fig. 9 A schematic diagram showing the movement of the support base when the wire current amount of the optical element driving device in the present application is different;

[0040] Fig.10 A schematic diagram showing the movement of the support base when the wire current amounts of the optical element driving device in the present application are the same is shown;

[0041] Fig.11 A schematic diagram showing the positional relationship between the telescopic spring and the claw in a specific embodiment of the present application is shown;

[0042] Fig.12 An exploded view of a portion of the structure of the optical element driving device in the present application is shown when the supporting base of the optical element driving device is used to support an image sensor.

[0043] The above drawings include the following reference numerals:

[0044] 10. Shell; 20. Base; 21. Positioning column; 22. Overlap surface; 23. Limiting protrusion; 30. Bearing seat; 31. Abutting protrusion; 311. Abutting surface; 3111. Slide groove; 32. Mounting protrusion; 33. Limiting wall; 40. Driving assembly; 41. Telescopic arm; 411. Movable end; 4111. Mounting plane; 4112. Supporting protrusion; 412. Connecting section; 413. Compression section; 414. Supporting section; 42. Telescopic spring; 421. Main body; 43. FPC board; 44. SMA wire; 45. Claw; 50. Limiting notch; 60. Pressing sheet; 70. Image sensor. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0047] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0048] In order to solve the problem of poor performance of a driving device of a camera device in the prior art, the present application provides an optical element driving device, a camera device and a mobile terminal.

[0049] It should be pointed out that the mobile terminal in the present application has a camera device, and the camera device in the present application has the following optical element driving device.

[0050] It should also be noted that the camera device in the present application can be used in the field of micro-imaging photography, such as tablets, computers, and automotive electronics, in addition to being used in the field of mobile phones.

[0051] like Figures 1 to 11 As shown, the optical element driving device in the present application includes a housing 10 and a base 20, wherein the housing 10 is covered on the base 20 and forms an accommodating space with the base 20, and the optical element driving device also includes a bearing seat 30 and a driving assembly 40 arranged in the accommodating space. The bearing seat 30 is movably arranged inside the accommodating space; the driving assembly 40 is arranged between the bearing seat 30 and the base 20, and the driving assembly 40 includes a plurality of telescopic arms 41, wherein the telescopic arms 41 have movable ends 411, and the movable ends 411 of the telescopic arms 41 are slidably connected with the bearing seat 30. When the driving assembly 40 is powered on, the movable ends 411 of the telescopic arms 41 slide relative to the base 20 and change the contact position with the bearing seat 30, so that the bearing seat 30 moves along the Z-axis direction or deflects relative to the Z-axis.

[0052] It should be pointed out that in the present application, when the driving assembly 40 is powered on, the different telescopic arms 41 only move in the X-axis and / or Y-axis directions.

[0053] When the optical element driving device in the present application is used, since the optical element driving device has a bearing seat 30, the optical elements (such as lenses, image sensors, OIS anti-shake structures) in the camera module can be installed on the bearing seat 30. The bearing seat 30 in the present embodiment is a lens seat with an intermediate accommodating cavity, so as to facilitate the installation of the lens in the lens seat. Moreover, since when the driving assembly 40 is powered on, the movable end 411 of the telescopic arm 41 slides relative to the base 20 and changes the contact position with the lens seat, so that the lens seat moves along the Z axis or deflects relative to the Z axis, the automatic focusing function or anti-shake function of the optical element driving device can be realized through the movement of the telescopic arm 41. When the movement distances of the multiple telescopic arms 41 are the same, the multiple telescopic arms 41 can drive the lens seat to move along the Z axis and realize AF drive. When the movement distances of the multiple telescopic arms 41 are different, the lens's axis shift anti-shake function can be realized. That is to say, in the present application, the driving coil, the driving magnet part and the suspension wire anti-shake part in the original voice coil motor are replaced by the driving assembly 40 of the lens driving device. Furthermore, since the present application no longer requires structures such as springs that match the drive magnet and the drive coil, the lens drive device in the present application is simpler in structure than the existing voice coil motor. At the same time, there is no magnet, so there will be no internal or external magnetic interference. Furthermore, the lens drive device in the present application does not have magnetic circuit design problems, and the average thrust of the entire stroke force is greater than that of the electromagnetic method, so it is more efficient than the existing voice coil motor. Furthermore, there is no upper and lower spring design of the voice coil motor, and there will be no spring deformation, nickel or foreign matter falling off in tests such as falling and rollers. Therefore, the lens drive device in the present application effectively solves the problem of poor performance of the drive device of the camera device in the prior art. Furthermore, in the present application, when the movable end 411 of the telescopic arm 41 slides relative to the base 20 and changes the contact position with the lens mount, the telescopic arm 41 moves in the XY axis direction, which reduces the movement requirements of the drive assembly 40 in the Z axis direction, thereby making the lens drive device thinner.

[0054] like Fig.12 As shown, in another specific embodiment of the present application, when the bearing seat 30 is used to mount the image sensor 70, the side of the bearing seat 30 away from the driving assembly 40 has a plurality of mounting protrusions 32, and the edge of the side of the bearing seat 30 away from the driving assembly 40 has a limiting wall 33. That is, when the bearing seat 30 of the optical element driving device in the present application is used to carry different elements, its structure will also be changed accordingly to adapt to the carried elements.

[0055] Specifically, each side of the bearing seat 30 corresponds to at least one telescopic arm 41 , and when the driving assembly 40 is powered on, the telescopic arm 41 moves along the corresponding side of the bearing seat 30 .

[0056] like Figures 5 to 10 As shown, the supporting seat 30 has a plurality of abutment protrusions 31 on one side corresponding to the telescopic arm 41, each abutment protrusion 31 is slidably connected to the movable end 411 of at least one telescopic arm 41, and the abutment protrusion 31 has an abutment surface 311 corresponding to the telescopic arm 41. When the telescopic arm 41 moves relative to the base 20, the movable end 411 of the telescopic arm 41 slides along the abutment surface 311.

[0057] In a specific embodiment of the present application, each abutting protrusion 31 corresponds to a movable end 411 of a telescopic arm 41, and when the positions where the movable ends 411 of different telescopic arms 41 contact the corresponding abutting surfaces 311 are the same, the multiple telescopic arms 41 can drive the support seat 30 to move along the Z-axis direction and realize AF drive. When the position where the movable end 411 of at least one of the movable ends 411 of the multiple telescopic arms 41 contacts the corresponding abutting surface 311 is different from the position where the movable ends 411 of the other telescopic arms 41 contact the corresponding abutting surface 311, the support seat 30 will be deflected relative to the Z-axis, thereby realizing the lens's axis shift anti-shake function.

[0058] In the present application, the bearing seat 30 has a body and an abutting protrusion 31, and the abutting protrusion 31 is arranged at the corner of the body facing the driving assembly 40. In addition, the distance between the abutting surface 311 of the abutting protrusion 31 and the body of the bearing seat 30 gradually increases in the direction away from the corner of the body of the bearing seat 30. Therefore, when the telescopic arm 41 moves relative to the base 20, the end of the movable end 411 of the telescopic arm 41 that contacts the abutting surface 311 changes its contact position with the abutting surface 311 by sliding relative to the abutting surface 311, so as to realize the driving of the bearing seat 30.

[0059] At the same time, with respect to the position of the body of the bearing seat 30 and the abutting protrusion 31, in the present application, each side of the body of the bearing seat 30 is correspondingly provided with an abutting protrusion 31, and the abutting protrusion 31 is correspondingly provided at one end of the corresponding side, and the corner formed by two adjacent sides has only one abutting protrusion 31. In addition, each side of the bearing seat 30 is respectively correspondingly provided with a telescopic arm 41, and the extension direction of the telescopic arm 41 is the same as the extension direction of the corresponding side, and different telescopic arms 41 extend toward different corners of the body of the bearing seat 30.

[0060] As for the part where the movable end 411 of the telescopic arm 41 contacts the abutting surface 311, in a specific embodiment of the present application, the movable end 411 of the telescopic arm 41 has a supporting surface that is parallel to the abutting surface 311, and at least a part of the supporting surface contacts the abutting surface 311, so that when the telescopic arm 41 moves, the supporting surface slides along the abutting surface 311. That is to say, in this embodiment, the part where the movable end 411 of the telescopic arm 41 contacts the abutting surface 311 is also a planar structure, so when the telescopic arm 41 is extended and retracted, the abutting surface 311 and the supporting surface contact each other and the supporting surface slides along the abutting surface 311. Moreover, when the telescopic arm 41 contracts, the supporting surface slides along the abutting surface 311, and the supporting surface is farther and farther from the side of the bearing seat 30 away from the base 20, thereby realizing the driving assembly 40 to drive the bearing seat 30. When the areas of the abutting surface 311 and the supporting surface are the same, when the driving assembly 40 is not powered on and the telescopic arm 41 is not extended, the abutting surface 311 and the supporting surface can be completely fitted, and after the driving assembly 40 is powered on, as the telescopic arm 41 is extended and retracted, the supporting surface can slide along the abutting surface 311, and the contact area between the supporting surface and the abutting surface 311 gradually decreases. Of course, in this embodiment, it can also be arranged that the area of ​​the abutting surface 311 is larger than the supporting surface, so that after the driving assembly 40 is powered on, the supporting surface can slide along the abutting surface 311, so that the supporting surface contacts the abutting surface 311 at different positions.

[0061] In another specific embodiment of the present application, Figure 6 and Figure 8 As shown, the abutting surface 311 of the abutting protrusion 31 has a slide groove 3111 extending along the moving direction of the telescopic arm 41, and at least a part of the movable end 411 of the telescopic arm 41 extends into the slide groove 3111. When the telescopic arm 41 moves relative to the base 20, the part of the movable end 411 of the telescopic arm 41 extending into the slide groove 3111 moves along the slide groove 3111. That is to say, in this embodiment, the part of the movable end 411 of the telescopic arm 41 that contacts the abutting surface 311 can extend into the inside of the slide groove 3111 of the abutting surface 311, so that when the driving assembly 40 is powered on and the telescopic arm 41 is extended and retracted, the part of the telescopic arm 41 extending into the inside of the slide groove 3111 can move along the length direction of the slide groove 3111. In this way, the movement trajectory of the telescopic arm 41 relative to the abutting surface 311 can be effectively limited, so as to ensure that during the telescopic arm 41 extension process, the portion of the movable end 411 of the telescopic arm 41 in contact with the abutting surface 311 will not deflect relative to the abutting surface 311, so as to ensure that the bearing seat 30 can move in a preset direction, thereby ensuring the stability of the operation of the optical element driving device. In addition, in this embodiment, the portion of the telescopic arm 41 extending into the slide slot 3111 can be in the shape of a sphere, a hemisphere, or a hexahedron.

[0062] In a specific embodiment of the present application, in the moving direction of the movable end 411 of the telescopic arm 41, the abutting surface 311 is arranged to be inclined relative to the body of the bearing seat 30, and the abutting surface 311 has an angle greater than 0 degrees and less than 90 degrees with the Z-axis direction. Since the movable end 411 of the telescopic arm 41 can slide along the abutting surface 311 when the telescopic arm 41 moves relative to the base 20, by tilting the abutting surface 311 relative to the body of the bearing seat 30, it can be ensured that when the portion of the movable end 411 in contact with the abutting surface 311 slides along the abutting surface 311, the bearing seat 30 is lifted along the Z-axis direction.

[0063] In a specific embodiment of the present application, the base 20 and the bearing seat 30 both have four sides, and in this embodiment, the number of telescopic arms 41 is 4, and each side of the bearing seat 30 is correspondingly provided with a telescopic arm 41. Of course, the structural form of the base 20 and the bearing seat 30 of the optical element driving device in the present application is not limited to having four sides as indicated in this embodiment, and the number of telescopic arms 41 can also be adjusted according to the number of sides of the base 20 and the bearing seat 30. At the same time, each side of the bearing seat 30 can also be correspondingly provided with multiple telescopic arms 41, so as to ensure the driving force of the driving component 40 on the bearing seat 30.

[0064] In the present application, the driving assembly 40 includes a telescopic spring 42, an FPC board 43, an SMA wire 44, and a plurality of claws 45. The telescopic spring 42 has a plurality of telescopic arms 41, and the telescopic spring 42 also has a body 421, which is disposed on the FPC board 43. To better cooperate with the lens drive, the body 421 is configured in a ring shape, and one end of the telescopic arm 41 is connected to the outer periphery of the body 421, and the other end of the telescopic arm 41 is a movable end 411 and can move relative to the body 421. The FPC board 43 is arranged on the base 20, and the telescopic spring 42 is arranged between the FPC board 43 and the bearing seat 30 and is electrically connected to the FPC board 43; there are multiple SMA wires 44, and each telescopic arm 41 corresponds to at least one SMA wire 44, one end of the SMA wire 44 is connected to the movable end 411 of the telescopic arm 41, and the other end of the SMA wire 44 is connected to the FPC board 43 or the base 20. When the SMA wire 44 is energized, the SMA wire 44 contracts and drives the telescopic arm 41 to move relative to the base 20. One end of the SMA wire 44 is connected to the movable end 411 of the telescopic arm 41 through a claw 45, and the other end of the SMA wire 44 is connected to the FPC board 43 or the base 20 through the claw 45.

[0065] It should also be noted that, in the present application, when the same amount of electricity is passed through different SMA wires 44, the different SMA wires 44 have the same amount of contraction, and at this time, the different telescopic arms 41 have the same degree of contraction, so the movable ends 411 of different telescopic arms 41 drive the bearing seat 30 to move the same distance, thereby achieving AF drive of the bearing seat 30. When different amounts of electricity are passed through different SMA wires 44, the different SMA wires 44 have different amounts of contraction, and at this time, the different telescopic arms 41 have different degrees of contraction, so the movable ends 411 of different telescopic arms 41 drive the bearing seat 30 to move the different distances, thereby achieving the axis-shift anti-shake drive of the bearing seat 30.

[0066] In a specific embodiment of the present application, one end of the SMA wire 44 is connected to the FPC board 43 through a claw 45, and the other end of the SMA wire 44 is connected to the movable end 411 of the telescopic arm 41 through the claw 45, and the SMA wire 44 can be electrically connected to the FPC board 43 and the telescopic arm 41 through the claw 45, so that when the FPC board 43 is energized, the SMA wire 44 is energized and contracted, thereby driving the movable end 411 to squeeze the telescopic arm 41 and move along the base 20, thereby changing the contact position between the movable end 411 and the abutting protrusion 31 of the bearing seat 30, thereby driving the bearing seat 30 to move. In addition, in this embodiment, the FPC board 43 is fixedly connected to the base 20, and the main body 421 of the telescopic spring 42 is fixedly arranged on the FPC board 43, while the telescopic arm 41 of the telescopic spring 42 can move relative to the main body 421 of the telescopic spring 42. That is, one of the two claws 45 connected to the two ends of the SMA wire 44 is disposed on the FPC board 43 , and the other claw 45 is disposed on the movable end 411 of the telescopic arm 41 .

[0067] Of course, in the present application, one end of the SMA wire 44 can also be connected to the base 20 through the claw 45, and the other end of the SMA wire 44 is connected to the movable end 411 of the telescopic arm 41 through the claw 45. That is to say, one of the two claws 45 connected to the SMA wire 44 is set on the base 20, and the other claw 45 is set on the movable end 411 of the telescopic arm 41. However, it should be noted that although the claw 45 can be set on the base 20, it is necessary to ensure that the SMA wire 44 can be electrically connected to the FPC board 43 through the claw 45.

[0068] In a specific embodiment of the present application, the telescopic arm 41 includes a connecting section 412, a compression section 413 and a supporting section 414 connected in sequence, the end of the connecting section 412 away from the compression section 413 is connected to the main body 421, the compression section 413 can be a bent bow spring, a spiral spring, a serpentine spring, etc., and the end of the supporting section 414 away from the compression section 413 is a movable end 411. In addition, in this embodiment, the connecting section 412 is tangent to the outer edge of the main body 421 of the telescopic spring 42. Moreover, when the SMA wire 44 is energized and contracted, the compression section 413 is squeezed, and the direction in which the compression section 413 is squeezed is the length direction of the connecting section 412.

[0069] Optionally, the movable end 411 has a mounting plane 4111, and a support protrusion 4112 extending toward the bearing seat 30 is provided on the mounting plane 4111, and the support protrusion 4112 is slidably connected to the bearing seat 30. In addition, the support protrusion 4112 has a support surface or an arc surface on the side facing the bearing seat 30. In a specific embodiment of the present application, the claw 45 connected to the movable end 411 of the telescopic arm 41 is formed by bending the mounting plane 4111.

[0070] Preferably, the telescopic arm 41 and the main body 421 of the telescopic spring 42 are an integrally formed structure.

[0071] In another specific embodiment of the present application, the driving assembly 40 may not have the telescopic spring 42 but only have multiple telescopic arms 41, and one end of the telescopic arm 41 is a movable end 411, and the other end of the telescopic arm 41 is fixedly set on the FPC board 43.

[0072] Optionally, each corner of the base 20 has at least one positioning column 21 extending toward the bearing seat 30, the positioning column 21 has a lap surface 22, the corner of the bearing seat 30 is overlapped on the lap surface 22, and the lap surface 22 has a limiting protrusion 23, and the bearing seat 30 has a limiting notch 50 that cooperates with the limiting protrusion 23. Through such an arrangement, the movement of the bearing seat 30 can be effectively limited, thereby ensuring the performance of the optical element driving device.

[0073] Specifically, the optical element driving device further includes a pressing sheet 60, which is disposed on a side of the bearing seat 30 away from the driving assembly 40 and connected to the top of the limiting protrusion 23 to provide a restoring force for the bearing seat 30 toward the driving assembly 40. It should be noted that in the present application, when the SMA wire 44 is in a non-energized state, the pressing sheet 60 can provide a pre-tightening force for the bearing seat 30, so that after the SMA wire 44 is energized, the pressing sheet 60 can provide a balancing force during the movement of the bearing seat 30, and provide a restoring force for the bearing seat 30 after the SMA wire 44 is de-energized.

[0074] In a specific embodiment of the present application, the pressing piece 60 includes a pressing portion and a connecting portion. The pressing portion is annular and abuts against the bearing seat 30; there are multiple connecting portions, and the multiple connecting portions correspond to the multiple positioning columns 21 one by one, and one end of the connecting portion is connected to the pressing portion, and the other end of the connecting portion is connected to the limiting protrusion 23 of the positioning column 21.

[0075] Optionally, the housing 10 is made of plastic material. Of course, other structures in the optical element driving device that do not need to be powered on can also be made of plastic material in the present application.

[0076] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0077] 1. Simple structure, easy assembly, simple circuit routing and stable circuit.

[0078] 2. Without magnets, there will be no internal or external magnetic interference problems.

[0079] 3. There is no problem with the magnetic circuit design. The average thrust of the entire stroke is greater than that of the magneto-electric method, which is more efficient than the magneto-electric method.

[0080] 4. There is no upper and lower spring design of the voice coil motor, and there will be no problems of spring deformation, nickel or foreign matter falling off in drop and roller tests.

[0081] 5. Plastic can be used to make the motor housing, which helps the db gain of the mobile terminal antenna.

[0082] 6. The motor can be made into motors with different shapes and structures.

[0083] 7. The finished motor product size with the same lens diameter can be smaller than the magnetoelectric method.

[0084] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0085] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0086] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical element driving device, characterized in that: The optical element driving device comprises a housing (10) and a base (20), wherein the housing (10) is disposed on the base (20) and forms a housing space with the base (20), and the optical element driving device further comprises: A bearing seat (30), the bearing seat (30) being movably arranged inside the accommodating space; A driving assembly (40), wherein the driving assembly (40) is arranged between the bearing seat (30) and the base (20), and the driving assembly (40) comprises a plurality of telescopic arms (41), wherein the telescopic arms (41) have movable ends (411), and the movable ends (411) of the telescopic arms (41) are slidably connected to the bearing seat (30). When the driving assembly (40) is powered on, the movable ends (411) of the telescopic arms (41) slide relative to the base (20) and change the contact position with the bearing seat (30), so that the bearing seat (30) moves along the Z-axis direction or deflects relative to the Z-axis. The bearing seat (30) has a plurality of abutment protrusions (31) on one side corresponding to the telescopic arm (41), each of the abutment protrusions (31) is slidably connected to a movable end (411) of at least one of the telescopic arms (41), and the abutment protrusion (31) has an abutment surface (311) corresponding to the telescopic arm (41), and when the telescopic arm (41) moves relative to the base (20), the movable end (411) of the telescopic arm (41) slides along the abutment surface (311); In the movement direction of the movable end (411) of the telescopic arm (41), the abutment surface (311) is arranged obliquely relative to the body of the bearing seat (30), and an angle between the abutment surface (311) and the Z-axis direction is greater than 0 degrees and less than 90 degrees.

2. The optical element driving device according to claim 1, characterized in that: Each side of the bearing seat (30) corresponds to at least one telescopic arm (41), and when the driving component (40) is powered on, the telescopic arm (41) moves along the corresponding side of the bearing seat (30).

3. The optical element driving device according to claim 1, characterized in that: When the driving assembly (40) is powered on, the different telescopic arms (41) only move in the X-axis and / or Y-axis directions.

4. The optical element driving device according to claim 1, characterized in that: The movable end (411) of the telescopic arm (41) has a supporting surface which is parallel to the abutting surface (311), and at least a portion of the supporting surface is in contact with the abutting surface (311), so that when the telescopic arm (41) moves, the supporting surface slides along the abutting surface (311).

5. The optical element driving device according to claim 1, characterized in that: The distance between the abutting surface (311) and the body of the bearing seat (30) gradually increases in a direction away from the corner of the body of the bearing seat (30).

6. The optical element driving device according to claim 1, characterized in that: The abutment surface (311) has a slide groove (3111) extending along the movement direction of the telescopic arm (41), and at least a portion of the movable end (411) of the telescopic arm (41) extends into the slide groove (3111). When the telescopic arm (41) moves relative to the base (20), the portion of the movable end (411) of the telescopic arm (41) extending into the slide groove (3111) moves along the slide groove (3111).

7. The optical element driving device according to claim 1, characterized in that: Each side of the bearing seat (30) is correspondingly provided with an abutting protrusion (31), and the abutting protrusion (31) is correspondingly provided at one end of the corresponding side, and the corner formed by two adjacent side edges has only one abutting protrusion (31).

8. The optical element driving device according to claim 1, characterized in that: Each side of the bearing seat (30) is respectively provided with a telescopic arm (41), the extension direction of the telescopic arm (41) is the same as the extension direction of the corresponding side, and different telescopic arms (41) extend toward different corners of the body of the bearing seat (30).

9. The optical element driving device according to claim 1, characterized in that: The driving assembly (40) comprises: A telescopic spring (42), wherein the telescopic spring (42) has a plurality of telescopic arms (41); An FPC board (43), wherein the FPC board (43) is arranged on the base (20), and the telescopic spring (42) is arranged between the FPC board (43) and the bearing seat (30) and is electrically connected to the FPC board (43); An SMA wire (44), wherein there are a plurality of SMA wires (44), each of the telescopic arms (41) corresponds to at least one of the SMA wires (44), one end of the SMA wire (44) is connected to a movable end (411) of the telescopic arm (41), and the other end of the SMA wire (44) is connected to the FPC board (43) or the base (20); when the SMA wire (44) is energized, the SMA wire (44) contracts and drives the telescopic arm (41) to move relative to the base (20).

10. The optical element driving device according to claim 9, characterized in that: The driving assembly (40) further comprises a plurality of claws (45), one end of the SMA wire (44) is connected to the movable end (411) of the telescopic arm (41) via the claw (45), and the other end of the SMA wire (44) is connected to the FPC board (43) or the base (20) via the claw (45).

11. The optical element driving device according to claim 9, characterized in that: The telescopic spring (42) comprises a main body (421), the main body (421) is arranged on the FPC board (43), the main body (421) is annular, one end of the telescopic arm (41) is connected to the outer periphery of the main body (421), and the other end of the telescopic arm (41) is a movable end (411) and can move relative to the main body (421).

12. The optical element driving device according to claim 11, characterized in that: The telescopic arm (41) comprises a connecting section (412), a compression section (413) and a supporting section (414) which are connected in sequence; an end of the connecting section (412) away from the compression section (413) is connected to the main body (421); and an end of the supporting section (414) away from the compression section (413) is a movable end (411).

13. The optical element driving device according to claim 12, characterized in that: The connecting section (412) is tangent to the outer periphery of the main body (421).

14. The optical element driving device according to any one of claims 1 to 13, characterized in that: The movable end (411) has a mounting plane (4111), and a supporting protrusion (4112) extending toward the bearing seat (30) is arranged on the mounting plane (4111), and the supporting protrusion (4112) is slidably connected to the bearing seat (30).

15. The optical element driving device according to claim 14, characterized in that: The supporting protrusion (4112) has a supporting surface or an arc-shaped surface on one side facing the supporting seat (30).

16. The optical element driving device according to any one of claims 1 to 13, characterized in that: Each corner of the base (20) is provided with at least one positioning column (21) extending toward the bearing seat (30), the positioning column (21) has a lap joint surface (22), the corner of the bearing seat (30) is lap jointed on the lap joint surface (22), and the lap joint surface (22) has a limiting protrusion (23), and the bearing seat (30) has a limiting notch (50) cooperating with the limiting protrusion (23).

17. The optical element driving device according to claim 16, characterized in that: The optical element driving device further comprises a pressing plate (60), wherein the pressing plate (60) is arranged on a side of the bearing seat (30) away from the driving assembly (40) and connected to the top of the limiting protrusion (23) to provide a restoring force for the bearing seat (30) toward the driving assembly (40).

18. The optical element driving device according to any one of claims 1 to 13, characterized in that: The side of the bearing seat (30) away from the driving assembly (40) has a plurality of mounting protrusions (32); and / or The edge of the bearing seat (30) on a side away from the driving assembly (40) has a limiting wall (33).

19. A camera device, characterized in that: The imaging device includes the optical element driving device according to any one of claims 1 to 18.

20. A mobile terminal, characterized in that: The mobile terminal includes the camera device according to claim 19.

Images