Optical drive and lens module having the same

Abstract

This application relates to an optical actuator, comprising: a base, a subbase, two or more sets of drive mechanisms, and a substrate; the base is suitable for mounting optical elements, and the base is movably connected to the subbase; the substrate is located between the subbase and the subbase and is movably connected to the subbase; the two or more drive mechanisms are located on different sides of the base, and are suitable for driving the base to move on the subbase and driving the optical elements to move; each set of drive mechanisms includes: a magnetic conductor, a magnetic attractor, a coil and a first magnet arranged opposite each other; one side of the magnetic conductor is fixedly connected to the side wall of the base, and the first magnet is installed on the other side of the magnetic conductor; the magnetic attractor is located at the bottom of the base, and two or more ball bearings are provided between the base and the substrate; two or more second magnets are provided at the top of the subbase, and the two or more second magnets are respectively arranged opposite to the two or more magnetic attractors, and the base presses down on the two or more ball bearings under the attraction of the second magnets on the magnetic attractors.

Description

Technical Field

[0001] This application relates to the field of optical technology, and in particular to an optical driver and a lens module having the same. Background Technology

[0002] High-performance camera lens modules are installed in portable terminals such as smartphones and tablets. In order to adapt to various shooting scenarios, the lens needs to constantly focus. During the focusing process, the stability of the optical elements inside the lens has an important impact on the image. If the optical elements shake during their movement, it will lead to image instability. This application proposes an optical driver that can improve the stability of the optical elements during their movement and reduce the vibration and shaking of the optical elements. Summary of the Invention

[0003] In view of this, this application proposes an optical actuator.

[0004] According to one aspect of this application, an optical driver is provided, comprising: two or more sets of driving mechanisms, a base, a substrate, and a base plate;

[0005] The base is suitable for mounting optical components. The base and the base can be movably connected. The substrate is located between the base and the base, and the base and the substrate can be movably connected.

[0006] Two or more drive mechanisms are located on different sides of the base, suitable for driving the base to move along the X-axis or Y-axis in the same coordinate system on the base and driving the optical element to move; each drive mechanism includes: a magnetic guide, a magnetic suction component, a coil and a first magnet arranged opposite each other; one side of the magnetic guide is fixedly connected to the side wall of the base, and the first magnet is installed on the other side of the magnetic guide; the magnetic suction component is located at the bottom of the base;

[0007] Two or more ball bearings are provided between the base and the substrate, and the base is suitable for movable connection between the base and the substrate via the ball bearings;

[0008] The base has two or more second magnets on its top, and the two or more second magnets are respectively arranged opposite to two or more magnetic components, which is suitable for pressing the base down to hold two or more balls under the attraction of the second magnets to the magnetic components.

[0009] In one possible implementation, the magnetic conductor is made of SPCC.

[0010] In one possible implementation, a ball bearing mounting groove is provided at the bottom of the base, and the balls are disposed in the ball bearing mounting groove.

[0011] In one possible implementation, there are four balls, located at the four bottom corners of the base.

[0012] In one possible implementation, it also includes: two or more reeds; the two or more reeds are connected between the base and the pedestal.

[0013] In one possible implementation, the reed includes: a first connecting portion, a second connecting portion, and a bent portion; the first connecting portion is connected to the base, the second connecting portion is connected to the base, and the two ends of the bent portion are respectively connected to the first connecting portion and the second connecting portion.

[0014] In one possible implementation, it also includes a top cover, which is fastened to the top surface of the base.

[0015] In one possible implementation, the base has two or more bottom posts.

[0016] According to another aspect of this application, a lens module is provided, including: an optical element and an optical driver;

[0017] The optical elements are located on the inside of the base.

[0018] Beneficial effects: The base is suitable for supporting the drive mechanism, and the base of the drive mechanism is suitable for mounting optical components. The drive mechanism on the outside of the base can drive the base to move, thereby causing the optical components to move linearly along the X-axis, Y-axis, and linear directions in the same coordinate system. The magnetic guide is suitable for mounting the first magnet, and a coil is arranged on the other side of the first magnet. The setting of the magnetic guide makes the magnetic field utilization of the magnetic circuit structure higher. The ball bearings between the base and the substrate can improve the smoothness of the base during movement, making the movement of the optical components more sensitive, and the ball bearings can also support the base. The second magnet on the base will generate an attraction to the magnetic suction component, causing the magnetic suction component to tend to move towards the base. Therefore, the magnetic suction component will drive the base to press against multiple ball bearings between the base and the substrate. Under the support of the ball bearings and the attraction of the second magnet, the base can be in close contact with the ball bearings, avoiding the base from bouncing up and down; ensuring that the base moves linearly in a preset direction without shaking or jumping in other directions, further improving the stability of the movement of the base and the optical components.

[0019] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0021] Figure 1 This diagram illustrates the main structure of the optical driver according to an embodiment of this application.

[0022] Figure 2A partial structural diagram of the optical driver according to an embodiment of this application is shown;

[0023] Figure 3 A bottom view of the optical driver according to an embodiment of this application is shown;

[0024] Figure 4 A partial structural diagram of the optical driver according to an embodiment of this application is shown;

[0025] Figure 5 A partial structural diagram of the optical driver according to an embodiment of this application is shown;

[0026] Figure 6 A partial structural diagram of the optical driver according to an embodiment of this application is shown;

[0027] Figure 7 A partial structural diagram of the optical driver according to an embodiment of this application is shown;

[0028] Figure 8 This diagram shows the main structure of the base according to an embodiment of this application;

[0029] Figure 9 This diagram shows the main structure of the base according to an embodiment of this application;

[0030] Figure 10 This diagram shows the main structure of the magnetic conductor and magnetic suction component according to an embodiment of this application.

[0031] Figure 11 A partial structural diagram of the optical driver according to an embodiment of this application is shown;

[0032] Figure 12 Show Figure 11 Bottom view;

[0033] Figure 13 This diagram illustrates the main structural features of the base according to an embodiment of this application.

[0034] Figure 14 This diagram illustrates the main structural features of the base according to an embodiment of this application.

[0035] Figure 15 This diagram shows the main structure of the substrate according to an embodiment of this application;

[0036] Figure 16 This diagram illustrates the main structural structure of the reed according to an embodiment of this application;

[0037] Figure 17 A partially enlarged view of the optical driver according to an embodiment of this application is shown;

[0038] Figure 18 This diagram shows the main structural structure of the top cover of the optical driver according to an embodiment of this application;

[0039] Figure 19 This diagram shows the main structure of the lens module according to an embodiment of this application;

[0040] Figure 20 An exploded view of the lens module structure according to an embodiment of this application is shown;

[0041] Figure 21 This paper shows a partial structural diagram of the lens module according to an embodiment of the present application;

[0042] Figure 22 This is a schematic diagram showing the movement direction of the base according to an embodiment of this application.

[0043] Base 100, top cover 200, base 300, substrate 110, second magnet 120, magnet mounting groove 130, ball bearing 320, ball bearing mounting groove 321, magnetic conductor 400, magnetic suction component 420, coil 500, first magnet 600, spring 700, optical element 800, support column 140, first support part 141, second support part 143, third support part 142, bottom column 160, magnetic plate 410, first connecting part 710, second connecting part 720, bending part 730. Detailed Implementation

[0044] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0045] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0048] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0049] Figure 1 This diagram illustrates the main structure of the optical driver according to an embodiment of this application. Figure 2 A partial structural diagram of the optical driver according to an embodiment of this application is shown; Figure 3 A bottom view of the optical driver according to an embodiment of this application is shown; Figure 4 A partial structural diagram of the optical driver according to an embodiment of this application is shown; as follows: Figure 1 As shown, an optical driver includes: a base 100, a base 300, a substrate 110, and two or more sets of drive mechanisms; the base 300 is suitable for mounting an optical element 800, and the base 300 is movably connected to the base 100; the substrate 110 is located between the base 100 and the base 300, and the base 300 and the substrate 110 are movably connected to drive the optical element 800 to move; multiple sets of drive mechanisms are respectively located on adjacent sides of the base 300, suitable for driving the base 300 to move on the base 100 in a preset direction and driving the optical element 800 to move; each set of drive mechanisms includes: a magnetic conductor 400, a magnetic suction component 420, and a coil 500 disposed opposite to each other. The first magnet 600 is fixedly connected to one side of the magnetic conductor 400 and the first magnet 600 is installed on the other side of the magnetic conductor 400; the magnetic attractor 420 is located at the bottom of the base 300, and two or more balls 320 are provided between the base 300 and the substrate 110. The base 300 is suitable for being movably connected to the substrate 110 through the balls 320; the top of the base 100 is provided with two or more second magnets 120, and the two or more second magnets 120 are respectively arranged opposite to the two or more magnetic attractors 420, which is suitable for pressing the base 300 downward to hold the two or more balls 320 under the attraction of the second magnets 120 to the magnetic attractors 420.

[0050] It should be noted that the base 100 is used to support the base 300, and the base 300 is used to mount the optical element 800. Multiple sets of drive mechanisms on the outside of the base 300 can drive the base 300 to move in a preset direction, thereby causing the optical element 800 to move. Under the driving action of the multiple sets of drive mechanisms, the base 300 can move linearly along the X-axis and Y-axis in the same coordinate system. The base 300 acts as a connecting bridge between the optical element 800 and the drive mechanism, preventing the drive mechanism from directly contacting the optical element 800. This ensures the stable installation of the optical element 800 while isolating and protecting it. Furthermore, the optical element 800 does not need to be designed with a specific shape according to the shape of the base 100. The magnetic guide 400 is used to mount the first magnet 600. A coil 500 is arranged on the other side of the first magnet 600. When the coil 500 is energized, it works together with the opposing first magnet 600 to generate a thrust, thereby pushing the optical element 800 to move along a preset direction. The magnetic guide 400 makes the magnetic field utilization of the magnetic circuit structure higher, achieving a larger stroke in a smaller size. The ball bearings 320 between the base 300 and the substrate 110 can improve the smoothness of the base 300 during movement, making the movement of the optical element 800 more sensitive. The ball bearings 320 can also support the base 300, preventing the weight of the base 300 or the optical element 800 from affecting normal operation. The second magnet 120 on the base 100 will exert an attractive force on the magnetic suction member 420, causing the magnetic suction member 420 to tend to move towards the base 100. Since the magnetic suction member 420 is connected to the base 300, the magnetic suction member 420 will drive the base 300 to press against the multiple balls 320 between the base 300 and the substrate 110. Under the support of the balls 320 and the attraction of the second magnet 120, the base 300 can be in close contact with the balls 320, avoiding the base 300 from bouncing up and down; ensuring that the base 300 moves in a straight line in the preset direction, without shaking or jumping in other directions, further improving the stability of the movement of the base 300 and the optical element 800; and also avoiding image instability caused by the user's hand tremors.

[0051] In one possible implementation, such as Figure 8 and Figure 9As shown, the main body of the base 100 is a quadrilateral plate structure, and each of the four corners of the base 100 is provided with a support column 140, which is vertically mounted on the base 100. Further, the support column 140 includes a first support portion 141, a second support portion 143, and a third support portion 142 integrally formed. The first support portion 141 is used to support the FPC board 610; the second support portion 143 is used to support the mounting top cover 200; and the third support portion 142 is used to support the mounting spring 700. The height of the second support portion 143 is higher than the height of the first support portion 141 and the third support portion 142, and each of the second support portion 143 and the third support portion 142 has two fixing pins at its top.

[0052] like Figure 9 As shown, a circular first clearance hole 150 is provided in the middle of the base 100 to avoid obstructing the optical element 800 from being exposed to the outside.

[0053] In one possible implementation, such as Figure 8 and Figure 9 As shown, the base 100 has two or more magnet mounting slots 130. The number of magnet mounting slots 130 is the same as the number of second magnets 120, which are suitable for mounting the second magnets 120. The second magnets 120 are embedded in the magnet mounting slots 130 and fixedly connected to the base 100 to prevent the second magnets 120 from falling out of the magnet mounting slots 130. The two or more magnet mounting slots 130 are arranged sequentially along the circumference of the first clearance hole 150 so that all the second magnets 120 are arranged in a circle.

[0054] In one possible implementation, the base 100 has two or more base posts 160 at its bottom, such as... Figure 3 As shown, the main body of the base column 160 is cylindrical, and the base column 160 is vertically installed at the bottom of the base 100. Furthermore, there are four base columns 160, which are located at the four corners of the bottom of the base 100.

[0055] In one possible implementation, such as Figure 10 As shown, the main body of the magnetic conductive component 400 is a rectangular plate structure, and the main body of the magnetic suction component 420 is a rectangular plate structure with a slot on one side. The long side of the magnetic conductive component 400 is connected to the slotted side of the magnetic suction component 420 through a Y-shaped connecting part 421. The magnetic conductive component 400 is also provided with a magnetic plate 410 on the side away from the magnetic suction component 420. The magnetic plate 410 and the magnetic suction component 420 are parallel to each other and perpendicular to the magnetic conductive component 400.

[0056] Optimally, to simplify the structure, the magnetic conductor 400, the Y-shaped connector 421, and the magnetic attractor 420 are integrally formed, together constituting a U-shaped structural component. In summary, since the magnetic conductor 400 is fixedly connected to the base 300, the magnetic attractor 420 is connected to the base 300 through the magnetic conductor 400, allowing the magnetic attractor 420 to drive the base 300 to press and hold the ball 320 under the action of the second magnet 120.

[0057] Both the magnetic conductor 400 and the magnetic attractor 420 are made of magnetic materials, such as SPCC or SUS430.

[0058] In one possible implementation, the drive mechanism comprises four sets, located on the four outer sides of the base 300, to improve the sensitivity and stability of driving the base 300. Further, as... Figure 5 As shown, the magnetic conductive elements 400 of the four sets of driving mechanisms are located on the four sides of the base 300 and are fixedly connected to the base 300. The main body of each of the four first magnets 600 is a cuboid structure, and the four first magnets 600 are fixedly disposed on the side of the four magnetic conductive elements 400 away from the base 300. Figure 2 As shown, four coils 500 are installed on the four inner walls of the FPC board 610 and are respectively opposite to the four first magnets 600. The FPC board 610 surrounds the four support columns 140 of the base 100, and the first support part 141 of the four support columns 140 effectively supports the FPC board 610.

[0059] In one possible implementation, such as Figure 13 As shown, the main body of the base 300 is a quadrilateral plate structure. A circular second clearance hole 330 is provided in the middle of the base 300. Four optical element limiting parts 310 are provided on the top of the base 300. When the optical element 800 is placed on the base 300, the four optical element limiting parts 310 limit and fix the middle optical element 800 to prevent the optical element 800 from falling off the base 300 when the base 300 moves, so as to improve the installation stability of the optical element 800.

[0060] Furthermore, each optical element limiting part 310 is provided with two spring mounting pins 311 for mounting springs 700.

[0061] In one possible implementation, such as Figure 14 As shown, a ball mounting groove 321 is provided at the bottom of the base 300, and the ball 320 is disposed in the ball mounting groove 321. The ball mounting groove 321 of the base 300 has a cylindrical groove-shaped structure, and the diameter of the ball 320 is larger than the depth of the ball mounting groove 321 so that the ball 320 can protrude from the ball mounting groove 321 and contact the substrate 110.

[0062] Furthermore, there are four ball bearings 320, which are located at the four bottom corners of the base 300. The combined support of the four ball bearings 320 ensures the stability of the base 300 during movement.

[0063] In one possible implementation, such as Figure 15 As shown, the main body of the substrate 110 has a quadrilateral plate structure. Four balls 320 respectively contact the top four corners of the substrate 110. A third clearance hole 111 is provided in the middle of the substrate 110. The third clearance hole 111 is suitable for making way for the optical element 800 and all the second magnets 120, so as to avoid blocking the optical element 800 and the second magnets 120 on the base 100. The substrate 110 can improve the working reliability of the device.

[0064] It should be noted that the substrate 110 can be integrally molded with the base 100, and the substrate 100 can also be formed by combining multiple plate-like structures.

[0065] In one possible implementation, it further includes two or more springs 700, with the base 300 connected to the base 100 via the two or more springs 700. It should be noted that the springs 700 can provide restoring force and buffering force to the base 300 when it moves, thereby enabling the optical element 800 to move quickly and stably.

[0066] In one possible implementation, such as Figure 16 and Figure 17 As shown, the spring 700 includes: a first connecting part 710, a second connecting part 720 and a bending part 730; the first connecting part 710 is connected to the base 100, the second connecting part 720 is connected to the base 300, and the two ends of the bending part 730 are respectively connected to the first connecting part 710 and the second connecting part 720. The main body of the first connecting part 710 is an L-shaped plate structure with two first connecting holes 711. The two fixing pins 144 of the third support part 142 of the support column 140 are respectively inserted into the two first connecting holes 711 to realize the connection between the spring 700 and the base 100. The main body of the second connecting part 720 is a plate structure with two second connecting holes 721. The two spring mounting pins 311 of the optical element limiting part 310 are respectively inserted into the two second connecting holes 721 to realize the connection between the spring 700 and the base 300. The main body of the bending part 730 is a filament structure with multiple "S" shaped bends. One end of the bending part 730 is connected to the first connecting part 710, and the other end of the bending part 730 is connected to the second connecting part 720. Under the elastic action of the bending part 730, the base 300 and the base 100 are movably connected.

[0067] Furthermore, there are four reeds 700, which are respectively connected between the four support columns 140 of the base 100 and the four optical element limiting parts 310 of the base 300.

[0068] In one possible implementation, it also includes a top cover 200, which is fastened to the top surface of the base 100. For example... Figure 18 As shown, the main body of the top cover 200 is a rectangular plate structure. A circular fourth clearance hole 210 is provided in the middle of the top cover 200 to avoid obstructing the optical element 800. Two mounting holes 220 are provided at each of the four corners of the top cover 200. The fixing pin 145 at the top of the second support part 143 of the support column 140 is adapted to pass through the mounting holes 220 of the top cover 200.

[0069] A lens module includes: an optical element 800 and an optical driver; the optical element 800 is disposed inside a base 300. Figure 19 As shown, the main body of the optical element 800 is a circular plate structure. The optical element 800 is placed on the base 300, and the four optical element limiting parts 310 of the base 300 contact the middle optical element 800 and limit it.

[0070] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An optical drive, characterized by, include: Base, pedestal, two or more sets of drive mechanisms, and base plate; The base is suitable for mounting optical components, the base is movably connected to the base plate, and the substrate is located between the base plate and the base, and the base and the substrate are movably connected to each other. Two or more sets of the driving mechanisms are respectively located on multiple sides of the base, and are suitable for driving the base to move along the X-axis or Y-axis in the same coordinate system on the base and driving the optical element to move. Each set of driving mechanisms includes: a magnetic conductor, a magnetic attractor, a coil and a first magnet arranged opposite each other; one side of the magnetic conductor is fixedly connected to the side wall of the base, and the first magnet is installed on the other side of the magnetic conductor; the magnetic attractor is located at the bottom of the base; Two or more ball bearings are provided between the base and the substrate, and the base is adapted to be movably connected to the substrate via the ball bearings; The base is provided with two or more second magnets at its top, and the two or more second magnets are respectively opposite to two or more magnetic suction components, which is suitable for pressing the base downward to hold two or more balls under the attraction of the second magnets on the magnetic suction components.

2. The optical drive of claim 1, wherein, The magnetic conductive component is made of SPCC.

3. The optical driver according to claim 1, characterized in that, The base has a ball bearing mounting groove at its bottom, and the ball bearing is disposed in the ball bearing mounting groove.

4. The optical driver according to claim 3, characterized in that, There are four balls in total, and the four balls are located at the four bottom corners of the base.

5. The optical driver according to claim 1, characterized in that, Also includes: Two or more reeds; the two or more said reeds are connected between the base and the pedestal.

6. The optical driver according to claim 5, characterized in that, The spring includes: a first connecting part, a second connecting part, and a bent part; the first connecting part is connected to the base, the second connecting part is connected to the base, and the two ends of the bent part are respectively connected to the first connecting part and the second connecting part.

7. The optical driver according to claim 1, characterized in that, The drive mechanism consists of four sets, which are located on the four outer sides of the base.

8. The optical driver according to claim 1, characterized in that, It also includes a top cover, which is fastened to the top surface of the base.

9. The optical driver according to claim 8, characterized in that, The base has two or more bottom posts.

10. A lens module, characterized in that, include: Optical element and optical driver as described in any one of claims 1-9; The optical element is disposed on the inner side of the base.

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