Integrated dual lens motor

Abstract

The application relates to a one-piece double-lens motor, which comprises a first lens driving device and a second lens driving device, and the first lens driving device and the second lens driving device share a one-piece shell; the first lens driving device comprises a first base and a first moving part movably arranged on the first base; the second lens driving device comprises a second base and a second moving part, the second moving part comprises a second carrier, a frame body and three groups of second magnets and a group of non-magnetized counterweight units arranged around the second carrier; and the non-magnetized counterweight unit is close to the first moving part. The second lens driving device adopts the arrangement of the three-edge second magnets, the fourth edge is provided with the non-magnetized counterweight unit for counterweight, and the two lens modules are arranged as close as possible to the edge of the non-magnetized counterweight unit, so that the overall size can be effectively reduced, the magnetic leakage between the two motors can be reduced, and mutual interference can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lens motor, in particular to a one-piece double lens motor. BACKGROUND

[0002] In recent years, two-lens modules have been widely used in various electronic devices, so that users can perform various photography, such as large wide-angle focusing lenses, and anti-shake lenses. Due to the size, the two-lens driving mechanisms are usually quite close, so the magnets arranged in different lens driving modules are prone to magnetic leakage interference, which affects the focusing speed and accuracy of the lens. Therefore, how to design a double-lens photography system that can prevent magnetic interference between different lens driving modules has become an important issue.

[0003] The concept of double lens was first proposed by T (US10656365B2 / CN106873121B). In the above patent, the magnets are configured as 2 (AF) + 4 (OIS), and the housing and base are shared to reduce costs. That is, this design shares the base, which easily affects the assembly yield of the two motors. If the yield of a single motor is 90%, the overall yield is 81%, which is a disadvantage.

[0004] Patent No. US20210176400A1 discloses a double-lens module, wherein the first camera unit includes an autofocus actuator including a pair of two-stage magnets to push the AF lens. The second camera unit includes an optical image stabilization and autofocus actuator including four magnets located in the corners, which can drive in three directions such as focusing and anti-shake. It is a split motor design, and a frame is usually needed when assembling the whole, which increases the cost and the process and size. SUMMARY

[0005] Therefore, to solve the above technical problems, the present application provides a one-piece double lens motor.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] An integrated double-lens motor comprises: a first lens driving device and a second lens driving device, which share an integrated housing; the first lens driving device comprises a first base and a first moving part movably arranged on the first base, the first moving part comprises a first carrier and two groups of first magnets arranged on opposite sides of the first carrier; the second lens driving device comprises a second base and a second moving part movably arranged on the second base, the second moving part comprises a second carrier, a frame and three groups of second magnets and a group of non-magnetized counterweight units arranged around the second carrier; the non-magnetized counterweight units are close to the first moving part; the first base and the second base are detachably connected.

[0008] In the double-lens motor, the first lens driving device is used as an auto-focusing motor, and the second lens driving device is used as a hand-shake prevention motor, wherein the first lens driving device adopts the arrangement of two pairs of edge first magnets, and the second lens driving device adopts the arrangement of three edge second magnets, and a non-magnetized counterweight unit is placed on the fourth edge to perform counterweighting; the two lens modules are arranged as close as possible on the edge of the non-magnetized counterweight unit, so as to effectively reduce the overall size and magnetic leakage between the two motors, and avoid mutual interference. The two bases, i.e. the first base and the second base, are detachably connected, so that they can be assembled separately and then spliced, thereby effectively improving the overall assembly yield.

[0009] Further, the two groups of first magnets away from one side of the first carrier are each provided with a first magnetic flux guide.

[0010] The first magnetic flux guide can enhance the magnetic attraction between the two groups of first magnets, thereby further reducing the interference caused by the surrounding magnetic field.

[0011] Further, the three groups of second magnets and the group of non-magnetized counterweight units away from one side of the second carrier are each provided with a second magnetic flux guide.

[0012] The second magnetic flux guide can enhance the magnetic attraction between the three groups of second magnets, thereby further reducing the interference caused by the surrounding magnetic field, and cooperating with the first magnetic flux guide to reduce the magnetic attraction between the two groups of first magnets and the three groups of second magnets, thereby greatly reducing the magnetic interference between the two motors.

[0013] Further, the second magnetic flux guide is an integrated structure, which comprises a mounting part and a magnetic flux guide part, the mounting part is placed on the second magnet or the non-magnetized counterweight unit, and the magnetic flux guide part is located outside the three groups of second magnets and the group of non-magnetized counterweight units.

[0014] Therefore, during installation, only the installation part is needed to be placed on the upper surface of the second magnet or the non-magnetized counterweight unit, at this time, the magnetic conducting part extends out of the four sides of the second carrier and extends in the height direction of the second carrier, so as to be outside the three groups of second magnets and outside the non-magnetized counterweight unit, so as to realize the enhancement of the magnetic force of the second magnet and the balance of the counterweight.

[0015] Further, the first base is provided with a barrier wall, the barrier wall is close to the second moving part, and a plurality of cavities are arranged in the barrier wall.

[0016] The barrier wall can further shield the interference of the magnetic field generated between the two motors, and the cavities in the barrier wall can make the barrier wall lightweight, thereby reducing the weight of the entire device.

[0017] Further, the first base is provided with a positioning clamping block, and the second base is provided with a positioning clamping groove matched with the positioning clamping block.

[0018] The positioning clamping block and the positioning clamping groove are arranged to facilitate the alignment and installation between the first base and the second base, that is, after the assembly of the two motors is completed, the relative positions of the first base and the second base are aligned, so that they can share an integrated shell, thereby improving the yield of the dual-lens motor assembly.

[0019] Further, the first moving part further comprises a first upper elastic sheet, a first coil and a first lower elastic sheet, the first carrier is located between the first upper elastic sheet and the first lower elastic sheet and is installed on the first base through the first upper elastic sheet and the first lower elastic sheet, and the first coil is located on the first carrier and opposite to the first magnet.

[0020] The first moving part moves under the action of the Ampere force by energizing the first coil and cooperating with the magnetic field generated by the first magnet, thereby realizing the focusing function. It can be understood that the first base is provided with a corresponding circuit board.

[0021] Further, the second moving part further comprises a second upper elastic sheet, a second coil, a second lower elastic sheet, a planar coil and a plurality of suspension wires, the second carrier is suspended on the second base through the second upper elastic sheet, the second lower elastic sheet and the plurality of suspension wires, the second coil is located on the second carrier, and the planar coil is located on the second base.

[0022] Similarly, the second moving part moves in multiple directions under the action of the Ampere force by energizing the second coil and the planar coil and cooperating with the magnetic field generated by the second magnet, thereby realizing the anti-shake function. It can be understood that the second base is provided with a corresponding circuit board.

[0023] Further, the second coil is opposite to three groups of the second magnets and one group of the non-magnetized counterweight unit, and the planar coils are three, and the three planar coils are respectively opposite to the three groups of the second magnets.

[0024] Further, the integrated shell is made of non-magnetic material.

[0025] The non-magnetic integrated shell is used for protecting the first lens driving device and the second lens driving device, and can effectively avoid the magnetic field generated by the first lens driving device and the second lens driving device from interfering with external elements.

[0026] The present application has the following beneficial effects compared with the prior art:

[0027] The double-lens motor of the present application adopts the arrangement of two pairs of first magnets for the first lens driving device, and adopts the arrangement of three second magnets for the second lens driving device, and a non-magnetized counterweight unit is placed on the fourth side to perform counterweight, and the two lens modules are arranged as close as possible on the side of the non-magnetized counterweight unit, so that the overall size can be effectively reduced and the magnetic leakage between the two motors can be reduced, thereby avoiding mutual interference. In addition, the first base and the second base are detachably connected, so that they can be assembled separately and then spliced during assembly, thereby effectively improving the overall assembly yield. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is an overall structure explosion diagram of the embodiment of the present application.

[0029] Figure 2 It is a partial structure assembly diagram of the embodiment of the present application.

[0030] Figure 3 It is a bottom structure schematic diagram of the first base and the second base of the embodiment of the present application.

[0031] Figure 4 It is a structure schematic diagram of the second magnetic permeability iron of the embodiment of the present application.

[0032] Figure 5 It is a structure schematic diagram of the first base of the embodiment of the present application.

[0033] Figure 6 It is a practical measurement magnetic force schematic diagram of the embodiment of the present application.

[0034] 100 - first lens driving device; 110 - first base; 111 - barrier wall; 112 - cavity; 113 - positioning block; 120 - first carrier; 130 - first magnet; 140 - first magnetic conductive iron; 150 - first coil; 160 - first upper elastic piece; 170 - first lower elastic piece; 200 - second lens driving device; 210 - second base; 211 - planar coil; 212 - positioning clamping groove; 220 - second carrier; 221 - second coil; 230 - frame body; 240 - second magnet; 250 - non-magnetized counterweight unit; 260 - second magnetic conductive iron; 261 - mounting portion; 262 - magnetic conductive portion; 270 - second upper elastic piece; 280 - second lower elastic piece; 290 - suspension wire; 300 - integrated housing. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present application, a more complete description of the present application will be given below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein.

[0036] Please refer to Figures 1-5 , a preferred embodiment of the present application is.

[0037] Please refer to Figure 1 and Figure 2 , an integrated double-lens motor, comprising: a first lens driving device 100 and a second lens driving device 200, the first lens driving device 100 and the second lens driving device 200 share an integrated housing 300; the first lens driving device 100 comprises a first base 110 and a first moving part movably arranged on the first base 110, the first moving part comprises a first carrier 120 and two groups of first magnets 130 arranged on opposite sides of the first carrier 120; the second lens driving device 200 comprises a second base 210 and a second moving part movably arranged on the second base 210, the second moving part comprises a second carrier 220, a frame body 230, and three groups of second magnets 240 and a group of non-magnetized counterweight units 250 arranged around the second carrier 220; the non-magnetized counterweight units 250 are close to the first moving part; the connection between the first base 110 and the second base 210 is detachable.

[0038] In the embodiment, the first lens driving device 100 is used as an auto-focusing motor, and the second lens driving device 200 is used as an anti-shake motor. The first lens driving device 100 adopts the arrangement of two pairs of first magnets 130, and the second lens driving device 200 adopts the arrangement of three second magnets 240, and a non-magnetized counterweight unit 250 is arranged at the fourth side to serve as a counterweight. The two lens modules are arranged as close as possible to each other at the side of the non-magnetized counterweight unit 250, so as to effectively reduce the overall size and magnetic leakage between the two motors, and avoid mutual interference. The first base 110 and the second base 210 are detachably connected, so that they can be assembled separately and then spliced together, thereby effectively improving the overall assembly yield.

[0039] The use of the non-magnetized counterweight unit 250 maintains the symmetry of the second moving part, thereby improving the dynamic characteristics of the second moving part, and further increasing the frequency width of the driving control. The thrust in the OIS X direction may be reduced, but the magnetic thrust in this direction still meets the requirements through simulation analysis and actual verification results. In addition, the magnetic thrust can also be increased by appropriately increasing the size of the magnets at the symmetric end. Please refer to Figure 6 Under the rated current, the strokes of OIS X and OIS Y can meet the requirements (commonly ≧100um @ 100mA). Generally, the thrust in the OIS X direction can be increased by increasing the number of coils due to the single magnet.

[0040] In the embodiment, the two groups of first magnets 130 are provided with first magnetic conductive iron 140 away from the side of the first carrier 120. Specifically, the first magnet 130 is a bipolar magnet, and the two groups of first magnets 130 are located at the two sides in the X direction. Correspondingly, the two first magnetic conductive irons 140 are distributed outside the two groups of first magnets 130, and the first magnetic conductive iron 140 can be mounted on the one-piece shell 300.

[0041] The arrangement of the first magnetic conductive iron 140 can enhance the magnetic attraction between the two groups of first magnets 130, and further reduce the interference caused by the magnetic field around them.

[0042] In the embodiment, the second magnetic guide iron 260 is arranged on the side of the second carrier 220 away from the three groups of second magnets 240 and the group of non-magnetized counterweight units 250. Specifically, the non-magnetized counterweight unit 250 has the same shape and weight as the second magnet 240. The frame 230 is arranged around the second carrier 220, and the inner side of the frame 230 is provided with a groove for placing the non-magnetized counterweight unit 250 and the second magnet 240, so that the non-magnetized counterweight unit 250 or the second magnet 240 is located between the inner side of the frame 230 and the outer side of the second carrier 220. Correspondingly, the second magnetic guide iron 260 is located between the outer side of the non-magnetized counterweight unit 250 or the second magnet 240 and the inner side of the frame 230.

[0043] The arrangement of the second magnetic guide iron 260 can enhance the magnetic attraction between the three groups of second magnets 240, thereby further reducing the interference caused by the magnetic field around the second magnets 240, and cooperating with the first magnetic guide iron 140 to reduce the magnetic attraction between the two groups of first magnets 130 and the three groups of second magnets 240, thereby greatly reducing the magnetic interference between the two motors.

[0044] Please refer to Figure 1 and Figure 4 In the embodiment, the second magnetic guide iron 260 is an integral structure, which includes a mounting portion 261 and a magnetic guide portion 262. The mounting portion 261 is placed on the second magnet 240 or the non-magnetized counterweight unit 250, and the magnetic guide portion 262 is located outside the three groups of second magnets 240 and the group of non-magnetized counterweight units 250. Specifically, the mounting portion 261 can be lapped on the top of the second magnet 240 or the non-magnetized counterweight unit 250, and the magnetic guide portion 262 is integrally bent on the mounting portion 261, so that the magnetic guide portion 262 can be arranged outside the second magnet 240 or the non-magnetized counterweight unit 250.

[0045] Therefore, during installation, only the mounting portion 261 needs to be clamped on the upper surface of the second magnet 240 or the non-magnetized counterweight unit 250. At this time, the magnetic guide portion 262 extends out of the four sides of the second carrier 220 and simultaneously extends in the height direction of the second carrier 220, so as to be outside the three groups of second magnets 240 and the group of non-magnetized counterweight units 250, thereby achieving the enhancement of the magnetic force of the second magnet 240 and the balance of the counterweight.

[0046] Please refer to Figure 1 and Figure 5 In the embodiment, the first base 110 is provided with a partition wall 111 close to the second moving part, and a plurality of cavities 112 are arranged in the partition wall 111.

[0047] The barrier wall 111 can further shield the interference between the two motors caused by the magnetic field, and the cavity 112 inside the barrier wall 111 can make the barrier wall 111 lightweight, thereby reducing the weight of the entire device.

[0048] In the embodiment, the first base 110 is provided with a positioning block 113, and the second base 210 is provided with a positioning slot 212 matched with the positioning block 113. Of course, the positioning block 113 can be arranged on the second base 210, and correspondingly, the positioning slot 212 is arranged on the first base 110.

[0049] The positioning block 113 and the positioning slot 212 are arranged to facilitate the alignment and installation between the first base 110 and the second base 210, that is, after the assembly of the two motors is completed, the relative positions of the first base 110 and the second base 210 are aligned, so that they can share an integrated shell 300, thereby improving the yield of the dual-lens motor assembly.

[0050] Please refer to Figure 1 In the embodiment, the first movement part further includes a first upper spring 160, a first coil 150, and a first lower spring 170, the first carrier 120 is located between the first upper spring 160 and the first lower spring 170 and is installed on the first base 110 through the first upper spring 160 and the first lower spring 170, and the first coil 150 is located on the first carrier 120 and opposite to the first magnet 130.

[0051] The first movement part moves by energizing the first coil 150 and cooperating with the magnetic field generated by the first magnet 130, that is, under the action of the Ampere force, to realize the focusing function. It can be understood that the first base 110 is provided with a corresponding circuit board. It can be understood that the first base 110 should be provided with a circuit board for controlling the first movement part and a pin connected with the circuit board, and the pin is used to connect with other electronic elements.

[0052] In the embodiment, the second movement part further includes a second upper spring 270, a second coil 221, a second lower spring 280, a planar coil 211, and a plurality of suspension wires 290, the second carrier 220 is suspended on the second base 210 through the second upper spring 270, the second lower spring 280, and the plurality of suspension wires 290, the second coil 221 is located on the second carrier 220, and the planar coil 211 is located on the second base 210.

[0053] Similarly, the second moving part moves in multiple directions, i.e. X & Y directions and Z direction, by the suspension wire 290 under the action of the Ampere force, by energizing the second coil 221 and the planar coil 211 and cooperating with the magnetic field generated by the second magnet 240, to realize the anti-handshake function. It can be understood that the second base 210 should be provided with a circuit board for controlling the second moving part and pins connected with the circuit board, which are used to connect with other electronic elements.

[0054] In the embodiment, the planar coil 211 is three, the second coil 221 is opposite to three groups of second magnets 240 and a group of non-magnetized counterweight units 250, and the three planar coils 211 are respectively opposite to the three groups of second magnets 240. Among them, the second coil 221 is arranged around the outer periphery of the second carrier 220, and the planar coil 211 is electrically connected with the circuit board on the second base 210.

[0055] In the embodiment, the integrated shell 300 is made of non-magnetic material. The non-magnetic integrated shell 300 is used to protect the first lens driving device 100 and the second lens driving device 200, and can effectively avoid the interference of the magnetic field generated by the first lens driving device 100 and the second lens driving device 200 to external elements.

[0056] In addition, it should be noted that the embodiment has the independence of process and the independence of yield. When the double-lens motor is assembled, the first base 110 and the second base 210 adopt a separate design, but the first lens driving device 100 and the second lens driving device 200 share an integrated shell. The assembly process is as follows. First, the second lens driving device 200 is assembled, and then tested to confirm that it is a good product. Then, the first lens driving device 100 is assembled, and then tested. In this way, there is no need to test after complete assembly, thereby effectively improving the fault tolerance and product yield.

[0057] In the description of the present application, it should be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0058] Furthermore, the terms "first", "second", and the like, do not denote any

[0059] While the application has been described in connection with specific embodiments thereof, it will be understood that it is capable of further modifications and this application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.

Claims

1. An integrated dual-lens motor, characterized in that, The utility model relates to a kind of lens drive device, including: First lens drive device and second lens drive device, the first lens drive device and second lens drive device share integrated housing; First lens drive device as autofocus motor, second lens drive device as hand-shake prevention motor; The first lens drive device includes first base, and first movement part movably arranged on the first base, and the first movement part includes first carrier, and two groups of first magnet set on the opposite sides of the first carrier; The second lens drive device includes second base, and second movement part movably arranged on the second base, and the second movement part includes second carrier, frame body, and three groups of second magnet and a group of non-magnetized counterweight unit set around the second carrier; The non-magnetized counterweight unit is close to the first movement part;The connection between the first base and the second base is detachable connection;The first base is provided with positioning block, and the second base is provided with positioning slot matched with the positioning block.

2. The one-body dual lens motor according to claim 1, wherein Two groups of the first magnet are provided with first magnetic guide iron away from the side of the first carrier.

3. The one-body dual lens motor according to claim 1, wherein Three groups of the second magnet and a group of the non-magnetized counterweight unit are provided with second magnetic guide iron away from the side of the second carrier.

4. The one-body dual lens motor according to claim 3, wherein The second magnetic guide iron is integrally formed, and the second magnetic guide iron includes mounting part and magnetic guide part, the mounting part is placed on the second magnet or non-magnetized counterweight unit, and the magnetic guide part is located outside three groups of the second magnet and a group of the non-magnetized counterweight unit.

5. The one-body dual lens motor according to claim 1, wherein The first base is provided with barrier wall, the barrier wall is close to the second movement part, and a plurality of cavities are arranged in the barrier wall.

6. The one-body dual lens motor according to claim 1, wherein The first movement part further includes first upper spring, first coil and first lower spring, the first carrier is located between the first upper spring and the first lower spring, and is mounted on the first base through the first upper spring and the first lower spring, the first coil is located on the first carrier and opposite the first magnet.

7. The one-body dual lens motor according to claim 1, wherein The second movement part further includes second upper spring, second coil, second lower spring, planar coil and a plurality of suspension wires, the second carrier is hung on the second base through the second upper spring, the second lower spring and a plurality of the suspension wires, the second coil is located on the second carrier, and the planar coil is located on the second base.

8. The one-body dual lens motor according to claim 7, wherein The second coil is opposite three groups of the second magnet and a group of the non-magnetized counterweight unit, and the planar coil is three, and three planar coils are opposite three groups of the second magnet respectively.

9. The one-piece dual lens motor according to any one of claims 1-8, wherein, The integrated housing is made of non-magnetic material.

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