Lens driving device, camera module and electronic equipment

Abstract

The utility model provides a lens driving device, a camera module and electronic equipment. The lens driving device comprises a base assembly which is provided with an accommodating space; at least one part of the lens supporting body is movably arranged in the accommodating space; the number of the driving coils is at least two, and the two driving coils are arranged on a group of two adjacent side walls of the lens supporting body; the number of the driving magnets is at least two, and the two driving magnets correspond to the two driving coils and are arranged on the base assembly; at least one part of the FPC board is arranged on the lens supporting body and electrically connected with the driving coil, and at least the other part of the FPC board is arranged on the base assembly. The utility model solves the problem of poor use performance of the lens motor in the prior art.

Description

Technical Field

[0001] The utility model relates to the field of lens equipment, and in particular to a lens driving device, a camera module and an electronic device. Background Art

[0002] At present, the thickness of mobile devices is getting thinner and thinner. When the camera is integrated with other devices (such as mobile phones and tablets), the size of the camera needs to be as small as possible to fit in thinner mobile devices. The autofocus function of the lens is generally realized by the voice coil motor. The voice coil motor includes a mover part and a stator part. The mover part is fixed with the lens, and the mover part can move relative to the stator part in the direction of the optical axis. Due to the size of the camera, the internal space of the voice coil motor is limited, which puts forward high requirements for the miniaturization design of the internal drive components.

[0003] The existing sliding-axis voice coil motor has a stator part that is a coil and a mover part that is a magnet. In order to adapt to more demanding application scenarios, such as effectively improving the imaging quality of the camera module in different shooting environments, a variable aperture device is added to the front end of the lens to adjust the amount of light entering the lens. This not only makes the voice coil motor more and more difficult to assemble, but also causes the mover part to become heavier and the voice coil motor has insufficient driving force.

[0004] Therefore, there is a problem of poor performance of the lens motor in the prior art. Utility Model Content

[0005] The main purpose of the utility model is to provide a lens driving device, a camera module and an electronic device to solve the problem of poor performance of the lens motor in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a lens driving device is provided, including: a base assembly, the base assembly has an accommodating space; a lens support body, at least a part of the lens support body is movably arranged in the accommodating space; a driving coil, there are at least two driving coils, and the two driving coils are arranged on a group of two adjacent side walls of the lens support body; a driving magnet, there are at least two driving magnets, and the two driving magnets correspond to the two driving coils arranged on the base assembly; an FPC board, at least a part of the FPC board is arranged on the lens support body and electrically connected to the driving coil, and at least another part of the FPC board is arranged on the base assembly.

[0007] Furthermore, the lens driving device also includes a guide assembly, and one of the lens support body and the base assembly is provided with the guide assembly, and the other is provided with a guide groove corresponding to the guide assembly.

[0008] Furthermore, the guide assembly includes at least two guide slide shafts, the two guide slide shafts are arranged on a set of diagonal corners of the base assembly, and the lens support body is provided with two guide grooves corresponding to the two guide slide shafts.

[0009] Furthermore, the base assembly has two corners of the guide sliding shaft respectively corresponding to ends of the two driving magnets that are away from each other.

[0010] Furthermore, the two guide slide shafts are located on the same side of a diagonal line of the base assembly.

[0011] Furthermore, the lens driving device also includes at least two magnetic attraction sheets, and at least one magnetic attraction sheet is respectively arranged on a side of each driving coil away from the driving magnet.

[0012] Furthermore, the FPC board includes a fixed part, a connecting part and a movable part connected in sequence, the fixed part is arranged on the base assembly, and the movable part is arranged on the lens support body. When the lens support body moves relative to the base assembly, at least a part of the connecting part is deformed.

[0013] Furthermore, the connecting portion includes a first segment, a second segment and a third segment connected in sequence, an end of the first segment away from the second segment is connected to the fixed portion, an end of the third segment away from the second segment is connected to the movable portion, at least a portion of the third segment is arranged on the lens support body, and at least the first segment and the second segment have a bending structure.

[0014] Furthermore, the third section is arranged on the top surface of the lens support body.

[0015] Furthermore, one end of the first section away from the second section is arranged on the outer wall of the base assembly, and one end of the first section connected to the second section is arranged in the accommodating space; one end of the second section connected to the first section is arranged corresponding to the bottom surface of the lens support body, and one end of the second section connected to the third section bypasses the outer wall of the lens support body and is connected to the third section.

[0016] Furthermore, a portion of the lens support body corresponding to the second section of the bottom surface thereof is provided with an avoidance groove.

[0017] Furthermore, the lens driving device also includes a metal connector, at least a portion of which is embedded in the interior of the lens support body, both ends of the metal connector are located outside the lens support body, and one end of the metal connector is electrically connected to the FPC board.

[0018] Furthermore, the lens driving device further comprises: at least two magnetic shielding plates, at least one magnetic shielding plate is respectively arranged on a side of each driving magnet away from the driving coil; and / or a shell, the shell cover is arranged on the base assembly.

[0019] According to another aspect of the present invention, a camera module is provided, comprising the above-mentioned lens driving device.

[0020] According to another aspect of the present invention, an electronic device is provided, comprising the above-mentioned camera module.

[0021] Applying the technical solution of the utility model, the lens driving device in the present application includes a base assembly, a lens support body, a driving coil, a driving magnet and an FPC board. The base assembly has a containing space; at least a part of the lens support body is movably arranged in the containing space; there are at least two driving coils, and the two driving coils are arranged on a group of two adjacent side walls of the lens support body; there are at least two driving magnets, and the two driving magnets corresponding to the two driving coils are arranged on the base assembly; at least a part of the FPC board is arranged on the lens support body and electrically connected to the driving coil, and at least another part of the FPC board is arranged on the base assembly.

[0022] When using the lens driving device in the present application, since the weight of the driving coil is relatively low compared to the weight of the driving magnet, after exchanging the positions of the driving magnet and the driving coil compared to the traditional lens driving device, it can be more conducive to the driving of the lens support. At the same time, since the driving magnet in the present application is arranged on the base assembly instead of the lens support, the size of the driving magnet can be enlarged as much as possible within a limited space, and the effect of the driving magnet and the driving coil can be effectively improved, as well as the driving force of the lens driving device. Therefore, the lens driving device in the present application has a greater driving force than the transmission lens driving device. In addition, since at least a part of the FPC in the present application is arranged on the lens support, and the other part is arranged on the base assembly, it can effectively ensure the stable electrical connection of the driving coil of the lens support during the movement. Therefore, the lens driving device in the present application effectively solves the problem of poor performance of the lens motor in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting 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 on the present invention. In the drawings:

[0024] Figure 1 A schematic structural diagram of a lens driving device according to a specific embodiment of the utility model is shown;

[0025] Figure 2 An exploded view of a lens driving device according to a specific embodiment of the present application is shown;

[0026] Figure 3 Shows Figure 2 A schematic diagram of the internal structure of the lens driving device;

[0027] Figure 4 Shows Figure 2 A schematic diagram of the positional relationship between the FPC board, the driving coil and the metal connecting parts of the lens driving device;

[0028] Figure 5 Shows Figure 2 A schematic diagram of the positional relationship between the base assembly of the lens driving device and the FPC board;

[0029] Figure 6 Shows Figure 2 A schematic diagram of the positional relationship between a lens support body and an FPC board of a lens driving device;

[0030] Figure 7 Shows Figure 6 Schematic diagram of the positional relationship between the lens support body and the FPC board from another perspective.

[0031] The above drawings include the following reference numerals:

[0032] 10. Base assembly; 20. Lens support body; 21. Avoidance groove; 30. Driving coil; 40. Driving magnet; 50. FPC board; 51. Fixed part; 52. Connecting part; 521. First section; 522. Second section; 523. Third section; 53. Movable part; 60. Guide assembly; 61. Guide groove; 62. Guide slide shaft; 70. Magnetic sheet; 80. Metal connector; 90. Magnetic shielding sheet; 100. Housing; 200. Aperture assembly. DETAILED DESCRIPTION

[0033] 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 utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] 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.

[0035] 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.

[0036] In order to solve the problem of poor performance of lens motors in the prior art, the present application provides a lens driving device, a camera module and an electronic device.

[0037] Furthermore, the electronic device in the present application is generally a mobile terminal such as a mobile phone or a laptop computer having a camera module. The camera module in the present application has the following lens driving device.

[0038] like Figures 1 to 7 As shown, the lens driving device in the present application includes a base assembly 10, a lens support body 20, a driving coil 30, a driving magnet 40 and an FPC board 50. The base assembly 10 has a containing space; at least a portion of the lens support body 20 is movably arranged in the containing space; there are at least two driving coils 30, and the two driving coils 30 are arranged on a group of two adjacent side walls of the lens support body 20; there are at least two driving magnets 40, and the two driving magnets 40 are arranged on the base assembly 10 corresponding to the two driving coils 30; at least a portion of the FPC board 50 is arranged on the lens support body 20 and is electrically connected to the driving coil 30, and at least another portion of the FPC board 50 is arranged on the base assembly 10.

[0039] When the lens driving device in the present application is used, since the weight of the driving coil 30 is relatively low compared to the weight of the driving magnet 40, after exchanging the positions of the driving magnet 40 and the driving coil 30, compared with the traditional lens driving device, it can be more conducive to the driving of the lens support 20. At the same time, since the driving magnet 40 in the present application is arranged on the base assembly 10 instead of the lens support 20, the size of the driving magnet 40 can be enlarged as much as possible within a limited space, and the effect of the driving magnet 40 and the driving coil 30 can be effectively improved, and the driving force of the lens driving device can be improved. Therefore, the lens driving device in the present application has a greater driving force than the transmission lens driving device. In addition, since at least a part of the FPC in the present application is arranged on the lens support 20, and the other part is arranged on the base assembly 10, it can effectively ensure the stable electrical connection of the driving coil 30 during the movement of the lens support 20. Therefore, the lens driving device in the present application effectively solves the problem of poor performance of the lens motor in the prior art.

[0040] Specifically, the lens driving device further includes a guide assembly 60, one of the lens support 20 and the base assembly 10 is provided with the guide assembly 60, and the other is provided with a guide groove 61 corresponding to the guide assembly 60. By providing the guide assembly 60, it is ensured that the lens support 20 can move along a preset direction under the interaction of the driving magnet 40 and the driving coil 30 without deflection during the movement, thereby effectively ensuring the performance of the lens driving device.

[0041] In a specific embodiment of the present application, the guide assembly 60 includes at least two guide slide shafts 62, and the two guide slide shafts 62 are arranged on a set of diagonal corners of the base assembly 10, and the lens support body 20 is provided with two guide grooves 61 corresponding to the two guide slide shafts 62. And the two corners of the base assembly 10 with the guide slide shafts 62 correspond to the ends of the two driving magnets 40 that are away from each other. Alternatively, the two corners of the base assembly 10 corresponding to the ends of the side walls of the two lens support bodies 20 corresponding to the two driving coils 30 that are away from each other are respectively provided with guide slide shafts 62. That is to say, in the present application, the ends of the two adjacent side walls of the lens support body 20 where the two driving coils 30 are located that are away from each other are respectively provided with guide grooves 61, and the two guide grooves 61 correspond to different guide slide shafts 62. At the same time, the two guide slide shafts 62 are located on the same side of a diagonal line of the base assembly 10. That is to say, although the guide slide shafts 62 in this embodiment are arranged diagonally corresponding to a group of base components 10, the two guide slide shafts 62 are not located on the diagonal line of the diagonal line, but are both located on the side of the diagonal line close to the driving coil 30 or the driving magnet 40. The purpose of such arrangement is to ensure that the lens support body 20 can be closer to the angle between the two side walls of the base component 10 with the driving magnet 40 under the action of the magnetic suction sheet 70 and the driving magnet 40, so as to ensure that the force of the lens support body 20 can be more stable through the cooperation of the guide slide shaft 62 and the guide groove 61, and ensure that the lens support body 20 will not be translated in the direction perpendicular to the optical axis during use.

[0042] Preferably, the guide slide shaft 62 is made of ceramic material. This arrangement can effectively reduce the friction between the lens support body 20 and the guide slide shaft 62, thereby ensuring that the movement of the lens support body 20 is smoother.

[0043] Furthermore, in the present application, the axial direction of the guide sliding shaft 62 is parallel to the optical axis direction of the lens of the camera module.

[0044] Optionally, the lens driving device further includes at least two magnetic sheets 70, and at least one magnetic sheet 70 is respectively provided on the side of each driving coil 30 away from the driving magnet 40. By such a configuration, it can be ensured that the lens support body 20 can be more fully in contact with the guide slide shaft 62 under the interaction of the magnetic sheet 70 and the driving magnet 40, thereby ensuring that the guide slide shaft 62 can better guide the lens support body 20. In other words, in the present application, the magnetic sheet 70 and the driving magnet 40 are mutually attracted.

[0045] In a specific embodiment of the present application, the driving coil 30 and its corresponding magnetic sheet 70 are respectively arranged on both sides of the FPC board 50. This arrangement can effectively prevent the magnetic sheet 70 from affecting the electrical connection between the driving coil 30 and the FPC board 50. In addition, this arrangement can also provide a mounting groove corresponding to the magnetic sheet 70 on the lens support body 20, thereby effectively preventing the driving coil 30 from protruding outward, so as to ensure that the internal structure of the lens driving device is more compact, and is conducive to the miniaturization design of the lens driving device.

[0046] Specifically, the FPC board 50 includes a fixed portion 51, a connecting portion 52 and a movable portion 53 connected in sequence, the fixed portion 51 is arranged on the base assembly 10, and the movable portion 53 is arranged on the lens support body 20. When the lens support body 20 moves relative to the base assembly 10, at least a portion of the connecting portion 52 is deformed. In the present application, since the driving coil 30 will generate induction with the driving magnet 40 after being energized, the lens support body 20 will move along the optical axis under the interaction between the driving coil 30 and the driving magnet 40, thereby realizing the focusing of the lens. Therefore, by providing a deformable portion on the FPC board 50, the resistance of the lens support body 20 when it moves relative to the base assembly 10 can be reduced, thereby ensuring that the movement of the lens support body 20 is smoother.

[0047] In a specific embodiment of the present application, the connecting portion 52 includes a first section 521, a second section 522 and a third section 523 connected in sequence, the end of the first section 521 away from the second section 522 is connected to the fixed portion 51, the end of the third section 523 away from the second section 522 is connected to the movable portion 53, at least a portion of the third section 523 is arranged on the lens support body 20, and at least the first section 521 and the second section 522 have a bending structure. By arranging the bending structure on the first section 521 and the second section 522, it can be ensured that when the lens support body 20 moves relative to the base assembly 10 for focusing, at least a portion of the bending structure of the first section 521 and the second section 522 can be deformed, thereby ensuring that the movable portion 53 of the FPC board 50 will not be separated from the lens support body 20, thereby ensuring the stable electrical connection between the FPC board 50 and the driving coil 30 and the performance of the lens driving device. Moreover, the deformation of the bending structure can also reduce the influence of the FPC board 50 on the lens support body 20 during the movement of the lens support body 20, further release the stress of the FPC board 50, and reduce the interference of the stress concentration of the FPC board 50 on the focusing movement of the lens support body 20, so as to ensure that the movement of the lens support body 20 is smoother.

[0048] Preferably, the third section 523 is arranged on the top surface of the lens support body 20. In addition, one end of the first section 521 away from the second section 522 is arranged on the outer side wall of the base assembly 10, and one end of the first section 521 connected to the second section 522 is arranged in the accommodation space; one end of the second section 522 connected to the first section 521 is arranged corresponding to the bottom surface of the lens support body 20, and one end of the second section 522 connected to the third section 523 bypasses the outer side wall of the lens support body 20 and is connected to the third section 523. By such arrangement, the deformation length of the FPC board connection part 52 is greatly extended in a limited space. The longer the deformation length, the less interference the FPC board 50 has on the driving. When the lens support body 20 moves relative to the base assembly 10, since the third section 523 is arranged on the top surface of the lens support body 20 and connected to the movable part 53, when the connection part 52 of the FPC board 50 is deformed, it will not affect the movable part 53, thereby ensuring the stable connection between the movable part 53 and the lens support body 20.

[0049] Optionally, the portion of the lens support body 20 corresponding to the second section 522 on the bottom surface thereof is provided with an avoidance groove 21. This arrangement not only ensures that the internal structure of the lens driving device is more compact, but also ensures that the FPC board 50 does not affect the height of the lens support body 20 in the optical axis direction, thereby effectively ensuring the performance of the lens driving device.

[0050] Optionally, the lens driving device further includes a metal connector 80, at least a portion of which is embedded in the interior of the lens support body 20, both ends of the metal connector 80 are located outside the lens support body 20, and one end of the metal connector 80 is electrically connected to the FPC board 50. In a specific embodiment of the present application, one end of the metal connector 80 is connected to a portion of the third section 523 located on the top surface of the lens support body 20. And, as Figure 1 As shown, in the present application, an aperture assembly 200 may also be provided on the top of the lens support 20, and the aperture assembly 200 is used to adjust the aperture size of the lens. At the same time, the aperture assembly 200 is fixedly provided on the top of the lens support 20 and can move with the lens support 20. Therefore, by providing the metal connector 80, the power-on end pin of the aperture assembly 200 can be welded to the two ends of the metal connector 80, thereby realizing the electrical connection between the aperture assembly 200 and the lens driving device.

[0051] Preferably, the lens driving device further comprises: at least two magnetic shielding sheets 90, each driving magnet 40 is provided with at least one magnetic shielding sheet 90 on a side away from the driving coil 30; and a housing 100, the housing 100 being covered on the base assembly 10. Such a configuration can not only prevent magnetic leakage from occurring in the lens driving device, but also effectively improve the magnetic field strength.

[0052] Of course, in the present application, the fixing portion of the FPC board may also be arranged around the outside of the shell, so as to facilitate electrical connection between the FPC board and other parts of the camera module.

[0053] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0054] 1. Effectively solve the problem of poor performance of lens motor in the prior art;

[0055] 2. Simple structure and stable performance.

[0056] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0057] 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.

[0058] 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.

[0059] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lens driving device, characterized in that: include: A base assembly (10), wherein the base assembly (10) has a receiving space; A lens support body (20), at least a portion of which is movably disposed in the accommodating space; A driving coil (30), wherein there are at least two driving coils (30), and the two driving coils (30) are arranged on two adjacent side walls of the lens support body (20); A driving magnet (40), wherein there are at least two driving magnets (40), and the two driving magnets (40) are arranged on the base assembly (10) corresponding to the two driving coils (30); An FPC board (50), at least a portion of which is disposed on the lens support body (20) and is electrically connected to the drive coil (30), and at least another portion of which is disposed on the base assembly (10).

2. The lens driving device according to claim 1, characterized in that: The lens driving device further comprises a guide assembly (60), wherein the guide assembly (60) is arranged on one of the lens support body (20) and the base assembly (10), and the other is provided with a guide groove (61) corresponding to the guide assembly (60).

3. The lens driving device according to claim 2, characterized in that: The guide assembly (60) comprises at least two guide slide shafts (62), the two guide slide shafts (62) are arranged at a set of diagonal corners of the base assembly (10), and the lens support body (20) is provided with two guide grooves (61) corresponding to the two guide slide shafts (62).

4. The lens driving device according to claim 3, characterized in that: The base assembly (10) has two corners of the guide sliding shaft (62) which respectively correspond to ends of the two driving magnets (40) that are away from each other.

5. The lens driving device according to claim 3, characterized in that: The two guide slide shafts (62) are located on the same side of a diagonal line of the base assembly (10).

6. The lens driving device according to claim 4, characterized in that: The lens driving device further comprises at least two magnetic attraction sheets (70), and at least one magnetic attraction sheet (70) is respectively arranged on a side of each driving coil (30) away from the driving magnet (40).

7. The lens driving device according to any one of claims 1 to 6, characterized in that: The FPC board (50) comprises a fixed portion (51), a connecting portion (52) and a movable portion (53) which are connected in sequence, wherein the fixed portion (51) is arranged on the base assembly (10), and the movable portion (53) is arranged on the lens support body (20), and when the lens support body (20) moves relative to the base assembly (10), at least a portion of the connecting portion (52) is deformed.

8. The lens driving device according to claim 7, characterized in that: The connecting portion (52) comprises a first section (521), a second section (522) and a third section (523) which are connected in sequence, wherein one end of the first section (521) away from the second section (522) is connected to the fixed portion (51), and one end of the third section (523) away from the second section (522) is connected to the movable portion (53), at least a portion of the third section (523) is arranged on the lens support body (20), and at least the first section (521) and the second section (522) have a bending structure.

9. The lens driving device according to claim 8, characterized in that: The third section (523) is arranged on the top surface of the lens support body (20).

10. The lens driving device according to claim 9, characterized in that: One end of the first section (521) away from the second section (522) is arranged on the outer side wall of the base assembly (10), and one end of the first section (521) connected to the second section (522) is arranged in the accommodating space; One end of the second section (522) connected to the first section (521) is arranged corresponding to the bottom surface of the lens support body (20), and one end of the second section (522) connected to the third section (523) bypasses the outer wall of the lens support body (20) and is connected to the third section (523).

11. The lens driving device according to claim 10, characterized in that: The portion of the lens support body (20) corresponding to the second section (522) located on the bottom surface thereof is provided with an avoidance groove (21).

12. The lens driving device according to claim 7, characterized in that: The lens driving device further comprises a metal connector (80), at least a portion of which is embedded in the interior of the lens support body (20), two ends of the metal connector (80) are located outside the lens support body (20), and one end of the metal connector (80) is electrically connected to the FPC board (50).

13. The lens driving device according to any one of claims 1 to 6, characterized in that: The lens driving device further comprises: At least two magnetic shielding sheets (90), with at least one magnetic shielding sheet (90) being provided on a side of each of the driving magnets (40) away from the driving coil (30); and / or A shell (100) is disposed on the base assembly (10).

14. A camera module, characterized in that: The lens driving device comprises the lens driving device as claimed in any one of claims 1 to 13.

15. An electronic device, characterized in that: Including the camera module described in claim 14.

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