Variable aperture drive motor, imaging device, and electronic apparatus

Abstract

The invention provides a variable aperture driving motor, an image pickup apparatus, and an electronic apparatus. The variable aperture driving motor comprises a base assembly which is provided with an accommodating cavity; at least one part of the lens supporting body is movably arranged in the accommodating cavity; the number of the driving magnets is multiple, and the multiple driving magnets are arranged on the circumferential side wall of the lens supporting body; the driving coils are arranged on the base assembly corresponding to the driving magnets, and the driving magnets and the driving coils induce each other so that the lens supporting body can rotate relative to the base assembly; the first end of the blade set is arranged at the top end of the base assembly, and the second end of the blade set is connected with the lens supporting body; at least one part of the gear assembly is arranged on the lens supporting body, and at least the other part of the gear assembly is arranged on the base assembly. The problem that in the prior art, a variable aperture driving device is poor in use performance is solved.

Description

Technical Field

[0001] The present invention relates to the field of camera devices, and in particular to a variable aperture drive motor, a camera device and an electronic device. Background Art

[0002] The aperture size of a mobile phone camera is an important factor affecting the photo quality. A large aperture camera has a large aperture, allowing more light to enter the camera module, shortening the shutter time, making it suitable for shooting moving objects. At the same time, it has a shallow depth of field and can also be used in scenes such as blurring the background and highlighting the subject. A small aperture camera has a longer shutter time and is suitable for shooting car tracks and star trails, etc. At the same time, it has a deep depth of field, ensuring the clarity of objects within multiple depth of field ranges.

[0003] The existing variable aperture drive device mainly uses ball bearings for support. On the one hand, the ball bearing processing accuracy, assembly accuracy, and driving accuracy are difficult to control. On the other hand, when subjected to external force or long-term use, the ball bearing groove pits caused by the small contact area of ​​the rolling surface or the ball bearing wear will lead to serious eccentricity problems of the rotating carrier.

[0004] Therefore, the prior art has the problem of poor performance of the variable aperture driving device. Summary of the Invention

[0005] The main purpose of the present invention is to provide a variable aperture drive motor, a camera device and an electronic device to solve the problem of poor performance of the variable aperture drive device in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a variable aperture drive motor is provided, comprising: a base assembly, the base assembly having an accommodating cavity; a lens support body, at least a portion of the lens support body is movably arranged inside the accommodating cavity; a driving magnet, a plurality of driving magnets, and the plurality of driving magnets are arranged on the circumferential side wall of the lens support body; a driving coil, a plurality of driving coils, and the driving coils are arranged on the base assembly corresponding to the driving magnets, and the driving magnets and the driving coils induce each other to rotate the lens support body relative to the base assembly; a blade group, a first end of the blade group is arranged at the top end of the base assembly, and a second end of the blade group is connected to the lens support body, so that the second end of the blade group can rotate relative to the first end of the blade group; a gear assembly, at least a portion of the gear assembly is arranged on the lens support body, and at least another portion of the gear assembly is arranged on the base assembly, and when the lens support body rotates relative to the base assembly, the portion of the gear assembly located on the lens support body moves relative to the portion of the gear assembly located on the base assembly.

[0007] Furthermore, the gear assembly includes: a ring gear, which is arranged around the circumferential outer wall of the lens support body; a gear set, which is arranged on the base assembly and meshes with the ring gear; when the lens support body rotates relative to the base assembly, the gear set moves relative to the ring gear along the circumference of the ring gear.

[0008] Furthermore, there are at least two gear sets, and the two gear sets are arranged on the base assembly at intervals.

[0009] Furthermore, there are two driving magnets and two driving coils, the two driving magnets are symmetrically arranged on the lens support body, and the two gear sets are symmetrically arranged on both sides of one of the driving coils; and / or the distance from the two gear sets to one of the driving coils is respectively smaller than the distance from the two gear sets to the other driving coil.

[0010] Furthermore, at least a portion of the gear ring is embedded in the interior of the lens support body, and at least another portion of the gear ring is exposed outside the lens support body.

[0011] Furthermore, the gear set includes: at least two bearings, which are arranged on the base assembly at intervals; a mounting shaft, with both ends of the mounting shaft respectively connected to different bearings; and a gear body, which is sleeved on the mounting shaft and meshes with the gear ring.

[0012] Furthermore, the axial direction of the mounting shaft and the axial direction of the lens support body are parallel to each other.

[0013] Furthermore, at least one of the gear ring, the bearing, the mounting shaft, and the gear body is made of at least one of ceramic and non-magnetic metal materials.

[0014] Furthermore, the gear ring is arranged on one side of the lens support body close to the bottom end of the base assembly.

[0015] Furthermore, the variable aperture drive motor also includes an FPC board, which is arranged around the circumferential outer wall of the base assembly, and a conductive connector is embedded in the interior of the base assembly, and the drive coil is electrically connected to the FPC board through the conductive connector.

[0016] Furthermore, the base assembly includes: a base body, on which the driving coil is arranged; an upper cover, which is arranged on the top of the base body and forms a accommodating cavity with the base body, the blade group is arranged on the side of the upper cover away from the lens support body, and the part of the gear assembly arranged on the base assembly is respectively connected to the base body and the upper cover.

[0017] Furthermore, the blade group includes a plurality of adjustment blades, the lens support body is provided with different toggle columns corresponding to different adjustment blades, and the upper cover is provided with different rotating columns corresponding to different adjustment blades. The adjustment blades are respectively connected to the corresponding toggle columns and rotating columns and can move with the lens support body. The upper cover is provided with different blade steps corresponding to different adjustment blades, and the rotating column is provided on the blade steps. Two adjacent adjustment blades are stacked on each other, and the height of the blade step corresponding to the lower adjustment blade is smaller than the height of the blade step corresponding to the upper adjustment blade.

[0018] Furthermore, the periphery of the upper cover has a plurality of mounting protrusions, and the base body is provided with a plurality of glue dispensing grooves corresponding to the mounting protrusions, and each glue dispensing groove is provided with at least one mounting protrusion; and / or the upper cover and the base body have mutually cooperating snap-fitting protrusions and snap-fitting grooves, one of the snap-fitting protrusions and snap-fitting grooves is provided on the upper cover, and the other is provided on the base body, and the driving coil is provided in the space enclosed by the snap-fitting protrusions and the snap-fitting grooves.

[0019] Furthermore, the side of the lens support body away from the upper cover has at least one abutment boss and at least one anti-collision boss extending toward the bottom surface of the base body, the base body is provided with at least one abutment surface corresponding to the abutment boss, and the base body is provided with at least one anti-collision surface corresponding to the anti-collision boss. The thickness of the abutment boss is smaller than the thickness of the anti-collision boss, and the distance from the abutment surface to the upper cover is smaller than the distance from the anti-collision surface to the upper cover.

[0020] Furthermore, the lens support body has a plurality of spaced-apart limiting protrusions extending toward the side wall of the base body in the circumference thereof, and each limiting protrusion is provided with at least one abutting boss and / or at least one anti-collision boss on the side away from the upper cover, and the circumferential inner side wall of the base body is provided with at least one stop boss corresponding to the limiting protrusion, and the anti-collision bosses and the stop bosses are spaced-apart along the circumference of the base body.

[0021] Furthermore, the variable aperture drive motor also includes a plurality of magnetic conductive sheets, each driving magnet is provided with at least one magnetic conductive sheet, the magnetic conductive sheet is provided on the base assembly, and the magnetic conductive sheet is located on the side of the driving coil away from the driving magnet.

[0022] Furthermore, the variable aperture drive motor also includes: a top cover, which is arranged on the side of the upper cover away from the base body, the top cover and the base body have at least one fixing protrusion and fixing groove that cooperate with each other, one of the fixing protrusion and the fixing groove is arranged on the top cover, and the other is arranged on the base body, and the top cover is provided with multiple positioning holes corresponding to the positioning columns of multiple base bodies; and / or a gasket, which is arranged on the side of the blade group close to the lens support body.

[0023] Furthermore, the driving magnet includes at least one of a monopole magnet, a multipole magnet, and a Halbach array magnet.

[0024] According to another aspect of the present invention, there is provided an imaging device including the variable aperture drive motor described above.

[0025] According to another aspect of the present invention, an electronic device is provided. The electronic device includes the above-mentioned camera device.

[0026] Applying the technical solution of the present invention, the variable aperture drive motor in this application includes a base assembly, a lens support body, a driving magnet, a driving coil, a blade group, and a gear assembly. The base assembly has a housing cavity; at least a portion of the lens support body is movably arranged inside the housing cavity; there are multiple driving magnets, and multiple driving magnets are arranged on the circumferential side wall of the lens support body; there are multiple driving coils, and the driving coils are arranged on the base assembly corresponding to the driving magnets, and the driving magnets and the driving coils are mutually induced to rotate the lens support body relative to the base assembly; the first end of the blade group is arranged at the top of the base assembly, and the second end of the blade group is connected to the lens support body so that the second end of the blade group can rotate relative to the first end of the blade group; at least a portion of the gear assembly is arranged on the lens support body, and at least another portion of the gear assembly is arranged on the base assembly. When the lens support body rotates relative to the base assembly, the portion of the gear assembly located on the lens support body moves relative to the portion of the gear assembly located on the base assembly.

[0027] When using the variable aperture drive motor of the present application, since it includes a gear assembly, at least a portion of which is disposed on the lens support body and at least another portion of which is disposed on the base assembly, when the drive coil is energized, the lens support body drives the blade assembly relative to the base assembly to move and adjust the aperture, the gear assembly can improve the displacement accuracy of the rotational drive of the blade assembly. Furthermore, the use of the gear assembly of the present application can also solve the problems existing in the prior art using ball bearings: due to the small contact area between the rolling surface of the ball bearing and the lens support body, ball groove pits may form on the surface of the lens support body, or the ball bearings may wear and cause the lens support body to be eccentric. Eccentric lens support can cause problems such as blade rotation jamming and poor aperture roundness, affecting drive performance and aperture shooting effects. The use of the gear assembly of the present application can effectively solve these problems, thereby improving blade drive performance and aperture roundness. Therefore, the variable aperture motor of the present application effectively solves the problem of poor performance of variable aperture drive devices in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0029] Figure 1A schematic structural diagram of a variable aperture drive motor according to a specific embodiment of the present invention is shown;

[0030] Figure 2 Shown Figure 1 An exploded view of the variable aperture drive motor;

[0031] Figure 3 Shown Figure 1 Schematic diagram of the internal structure of the variable aperture drive motor;

[0032] Figure 4 Shown Figure 1 Schematic diagram of the positional relationship between the base body, upper cover and lens support body of the variable aperture drive motor;

[0033] Figure 5 Shown Figure 1 Schematic diagram of the positional relationship between the lens support body and the ring gear of the variable aperture drive motor;

[0034] Figure 6 Shown Figure 1 Schematic diagram of the positional relationship between the base body and the magnetic conductive sheet of the variable aperture drive motor;

[0035] Figure 7 Shown Figure 1 Schematic diagram of the positional relationship between the base body, drive coil and gear set of the variable aperture drive motor;

[0036] Figure 8 Shown Figure 1 A schematic structural diagram of an upper cover of a variable aperture drive motor;

[0037] Figure 9 A schematic diagram showing the positional relationship between the FPC board of the variable aperture drive motor and the base body in a specific embodiment of the present application is shown.

[0038] The above drawings include the following reference numerals:

[0039] 10. Base assembly; 11. Base body; 111. Glue dispensing groove; 112. Snap-fit ​​groove; 113. Abutment surface; 114. Anti-collision surface; 115. Stop boss; 116. Fixing groove; 117. Positioning column; 12. Upper cover; 121. Rotating column; 122. Blade step; 123. Mounting boss; 124. Snap-fit ​​boss; 20. Lens support; 21. Toggle column; 22. Abutment boss; 23. Anti-collision boss ; 24. Limiting protrusion; 25. Magnet protrusion; 30. Driving magnet; 40. Driving coil; 50. Blade group; 51. Adjusting blade; 60. Gear assembly; 61. Ring gear; 62. Gear group; 621. Bearing; 622. Mounting shaft; 623. Gear body; 70. Magnetic plate; 80. Top cover; 81. Fixing protrusion; 82. Positioning hole; 90. Gasket; 100. Side steel sheet; 200. FPC board. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0042] 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 direction; 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 directional words are not used to limit the present invention.

[0043] In order to solve the problem of poor performance of variable aperture driving devices in the prior art, the present application provides a variable aperture driving motor, a camera device and an electronic device.

[0044] It should be noted that the electronic device in the present application includes an imaging device, and the imaging device in the present application includes the variable aperture drive motor described below.

[0045] like Figures 1 to 9As shown, the variable aperture drive motor of the present application includes a base assembly 10, a lens support 20, a drive magnet 30, a drive coil 40, a blade assembly 50, and a gear assembly 60. The base assembly 10 has a housing cavity; at least a portion of the lens support 20 is movably disposed within the housing cavity; there are multiple drive magnets 30, and the multiple drive magnets 30 are disposed on the circumferential sidewalls of the lens support 20; there are multiple drive coils 40, and the drive coils 40 are disposed on the base assembly 10 corresponding to the drive magnets 30. Preferably, the drive coils 40 are disposed on the sidewalls or bottom wall of the base assembly 10 corresponding to the drive magnets 30. The driving magnet 30 and the driving coil 40 induce each other to make the lens support body 20 rotate relative to the base assembly 10; the first end of the blade group 50 is set at the top of the base assembly 10, and the second end of the blade group 50 is connected to the lens support body 20 so that the second end of the blade group 50 can rotate relative to the first end of the blade group 50; at least a part of the gear assembly 60 is set on the lens support body 20, and at least another part of the gear assembly 60 is set on the base assembly 10. When the lens support body 20 rotates relative to the base assembly 10, the part of the gear assembly 60 located on the lens support body 20 moves relative to the part of the gear assembly 60 located on the base assembly 10.

[0046] When using the variable aperture drive motor of the present application, since it includes a gear assembly 60, and at least a portion of the gear assembly 60 is disposed on the lens support 20, and at least another portion of the gear assembly 60 is disposed on the base assembly 10, when the drive coil 40 is energized, the lens support 20 drives the blade assembly 50 to move relative to the base assembly 10 and adjust the aperture, the displacement accuracy of the rotational drive of the blade assembly 50 can be improved by the action of the gear assembly 60. Furthermore, the use of the gear assembly 60 of the present application can also solve the problems existing in the prior art using ball bearings: due to the small contact area between the rolling surface of the ball bearing and the lens support 20, ball grooves may form on the surface of the lens support 20, or the ball bearings may wear and cause the lens support 20 to decenter. This decentering of the lens support 20 can cause problems such as blade rotation jamming and low aperture roundness, affecting drive performance and aperture shooting effects. The use of the gear assembly of the present application can effectively solve these problems, thereby improving blade drive performance and aperture roundness. Therefore, the variable aperture motor in the present application effectively solves the problem of poor performance of the variable aperture driving device in the prior art.

[0047] In a specific embodiment of the present application, the gear assembly 60 includes a ring gear 61 and a gear set 62. The ring gear 61 is disposed around the circumferential outer wall of the lens support 20. The gear set 62 is mounted on the base assembly 10 and meshes with the ring gear 61. When the lens support 20 rotates relative to the base assembly 10, the gear set 62 moves relative to the ring gear 61 along the circumference of the ring gear 61. In this embodiment, the mating arrangement of the ring gear 61 and the gear set 62, compared to the mating orientation of ball bearings in the prior art, allows for improved machining and mating precision between the gear set 62 and the ring gear 61, thereby improving the displacement accuracy of the rotational drive of the variable aperture blades. Furthermore, in this embodiment, the actual movement process is that the lens support 20 drives the ring gear 61 along with it. At this time, there is relative motion between the ring gear 61 and the gear assembly 60, allowing the gear set 62 to mesh with different positions of the ring gear 61, thereby ensuring aperture adjustment accuracy.

[0048] Preferably, there are at least two gear sets 62, and the two gear sets 62 are spaced apart and arranged on the base assembly 10. With this arrangement, when the lens support 20 moves relative to the base assembly 10, the forces acting on the lens support 20 and the base assembly 10 can be more stable, thereby ensuring the performance of the variable aperture drive motor in this application.

[0049] Optionally, there are two driving magnets 30 and two driving coils 40 , and the two driving magnets 30 are symmetrically arranged on the lens support 20 , and the two gear sets 62 are symmetrically arranged on both sides of one of the driving coils 40 .

[0050] Optionally, the distance between the two gear sets 62 and one of the drive coils 40 is smaller than the distance between the two gear sets 62 and the other drive coil 40 .

[0051] Of course, in the present application, the relative position relationship between the drive coil 40 and the gear set 62 can be adjusted according to actual usage and design conditions.

[0052] Optionally, at least a portion of the ring gear 61 is embedded in the interior of the lens support body 20, at least another portion of the ring gear 61 is exposed outside the lens support body 20, and the gear set 62 is engaged with the portion of the ring gear 61 exposed outside the lens support body 20. This arrangement can effectively ensure the stability of the connection between the ring gear 61 and the lens support body 20, thereby ensuring that the lens support body 20 can drive the ring gear 61 to move together. It also ensures that during the rotation of the lens support body 20 relative to the base, there will be no relative movement between the lens support body 20 and the ring gear 61. At the same time, this arrangement can also ensure that the internal structure of the variable aperture drive motor is more compact, which is conducive to miniaturized design.

[0053] Specifically, the gear assembly 62 includes at least two bearings 621, a mounting shaft 622, and a gear body 623. The two bearings 621 are spaced apart on the base assembly 10; the mounting shaft 622 is connected to a different bearing 621 at each end; the gear body 623 is sleeved on the mounting shaft 622 and meshes with the ring gear 61. This arrangement ensures a more stable connection between the gear assembly 62 and the base assembly 10. Preferably, the base assembly 10 is provided with corresponding mounting slots for the two bearings 621.

[0054] Preferably, the axial direction of the mounting shaft 622 is parallel to the axial direction of the lens support 20. By such an arrangement, when the lens support 20 moves relative to the base assembly 10, the friction force on the lens support 20 can be effectively reduced.

[0055] Optionally, at least one of the gear ring 61 , the bearing 621 , the mounting shaft 622 , and the gear body 623 is made of at least one of ceramic and non-magnetic metal materials. This configuration can further effectively reduce the friction force on the lens support 20 .

[0056] Optionally, the gear ring 61 is arranged on one side of the lens support body 20 close to the bottom end of the base assembly 10. This arrangement can effectively ensure that the internal structure of the variable aperture drive motor is more compact.

[0057] Specifically, if Figure 9 As shown, the variable aperture drive motor also includes an FPC board 200, which is arranged around the circumferential outer wall of the base assembly 10, and a conductive connector is embedded in the interior of the base assembly 10, and the drive coil 40 is electrically connected to the FPC board 200 through the conductive connector.

[0058] In a specific embodiment of the present application, the base assembly 10 includes a base body 11 and an upper cover 12. A drive coil 40 is disposed on the base body 11; the upper cover 12 is disposed on top of the base body 11 and forms a housing cavity with the base body 11. The blade assembly 50 is disposed on the side of the upper cover 12 away from the lens support 20, and the portion of the gear assembly 60 disposed on the base assembly 10 is connected to the base body 11 and the upper cover 12, respectively. Furthermore, in this embodiment, one of the two bearings 621 of the gear assembly 62 is disposed on the upper cover 12, while the other bearing 621 is disposed on the bottom surface of the base body 11.

[0059] Specifically, the blade assembly 50 includes a plurality of adjustment blades 51. The lens support 20 is provided with different toggle posts 21 corresponding to different adjustment blades 51. The upper cover 12 is provided with different rotating posts 121 corresponding to different adjustment blades 51. The adjustment blades 51 are respectively connected to the corresponding toggle posts 21 and rotating posts 121 and can move together with the lens support 20. The upper cover 12 is provided with different blade steps 122 corresponding to different adjustment blades 51. The rotating posts 121 are provided on the blade steps 122. Two adjacent adjustment blades 51 are stacked on each other, and the height of the blade step 122 corresponding to the lower adjustment blade 51 is smaller than the height of the blade step 122 corresponding to the upper adjustment blade 51. By providing the blade steps 122, a better overlap effect between two adjacent adjustment blades 51 can be ensured, and it can be ensured that when adjusting the aperture size, different adjustment blades 51 will not get stuck.

[0060] Optionally, the upper cover 12 has a plurality of mounting protrusions 123 on its periphery, and the base body 11 is provided with a plurality of glue dispensing grooves 111 corresponding to the mounting protrusions 123, and each glue dispensing groove 111 is provided with at least one mounting protrusion 123. This arrangement can effectively improve the connection strength between the upper cover 12 and the base body 11.

[0061] Optionally, the upper cover 12 and the base body 11 have mutually cooperating snap-fitting protrusions 124 and snap-fitting grooves 112, one of which is provided on the upper cover 12 and the other on the base body 11, and the drive coil 40 is provided in the space enclosed by the snap-fitting protrusions 124 and the snap-fitting grooves 112. Of course, in the present application, after the snap-fitting protrusions 124 and the snap-fitting grooves 112 are snap-fitted and assembled, the connection between the upper cover 12 and the base body 11 can be reinforced by dispensing glue. In this embodiment, when the upper cover 12 and the base body 11 are engaged through the engaging protrusion 124 and the engaging groove 112, the upper cover 12 has the engaging protrusion 124, and the base body 11 has the engaging groove 112, and the side wall thickness at the position where the engaging groove 112 is set on the base body 11 is thinner than the side wall thickness at other positions. Therefore, setting the drive coil 40 here can effectively utilize the internal space of the base body 11, which is conducive to the miniaturization design of the entire motor.

[0062] Specifically, the side of the lens support body 20 away from the upper cover 12 has at least one abutting boss 22 and at least one anti-collision boss 23 extending toward the bottom surface of the base body 11. The base body 11 is provided with at least one abutting surface 113 corresponding to the abutting boss 22, and at least one anti-collision surface 114 corresponding to the anti-collision boss 23. The thickness of the abutting boss 22 along the axial direction of the center hole of the lens support body 20 is less than the thickness of the anti-collision boss 23, and the distance from the abutting surface 113 to the upper cover 12 is less than the distance from the anti-collision surface 114 to the upper cover 12. By providing the abutting boss 22, the bottom of the lens support body 20 can be brought into contact with the base body 11 through the abutting boss 22, thereby reducing the contact area between the bottom of the lens support body 20 and the base body 11, and further reducing the contact area between the lens support body 20 and the base body 11. When the variable aperture drive motor is hit or falls, since the lens support body 20 also has an anti-collision boss 23, and the thickness of the anti-collision boss 23 along the axial direction of the center hole of the lens support body 20 is greater than the thickness of the abutment boss 22, or the height of the anti-collision boss 23 is greater than the height of the abutment boss 22, the anti-collision boss 23 of the lens support body 20 can be timely abutted against the anti-collision surface 114 of the base body 11, thereby avoiding a greater impact between the lens support body 20 and the base body 11. Therefore, the main purpose of providing the anti-collision boss 23 in the present application is to reduce the impact between the lens support body 20 and the base body 11 when the variable aperture drive motor is accidentally hit or falls, thereby providing a certain limit protection for the variable aperture drive motor. An anti-collision boss can also be provided on the side of the lens support body 20 close to the upper cover 12.

[0063] Preferably, the lens support body 20 has a plurality of spaced-apart limiting protrusions 24 extending toward the sidewall of the base body 11. Each limiting protrusion 24 is provided with at least one abutting boss 22 and / or at least one anti-collision boss 23 on the side away from the upper cover 12, and the circumferential inner sidewall of the base body 11 is provided with at least one stop boss 115 corresponding to the limiting protrusion 24, and the anti-collision boss 23 and the stop boss 115 are distributed at intervals along the circumference of the base body 11. Moreover, when the lens support body 20 rotates relative to the base body 11, the limiting protrusion 24 moves in a direction approaching or away from the supporting protrusion. Moreover, in the present application, the driving magnet 30 can be provided on the periphery of the lens support body 20 that does not have the limiting protrusion 24, so that the limiting protrusion 24 can prevent the driving magnet 30 from colliding with the base body 11.

[0064] Optionally, in the present application, the lens support body 20 is further provided with a magnetic protrusion 25, and the limiting protrusion 24, the magnetic protrusion 25 and the driving magnet 30 are each provided in two groups, and the center connection of the two groups of limiting protrusions 24 is perpendicular to the center connection line of the two groups of magnetic protrusions 25, and each group of magnetic protrusions 25 is provided with a group of driving magnets 30, and each group of driving magnets 30 includes at least one driving magnet 30. In addition, the portion of the gear ring 61 corresponding to the limiting protrusion 24 and the magnetic protrusion 25 is exposed to the outside of the lens support body 20. In this way, when the lens support body 20 rotates relative to the base assembly 10, the rotation angle of the lens support body 20 can be effectively limited by the cooperation between the limiting protrusion 24 and the stop boss 115. However, it should be noted that the magnetic protrusion 25 does not contact the stop boss 115. At the same time, since the space between the limiting protrusion 24 and the magnetic protrusion 25 can form a certain recess, it can provide a certain amount of accommodation space for the gear set 62, thereby effectively reducing the overall diameter or size of the variable aperture drive motor. Of course, in this application, the magnetic protrusion can also be provided with an anti-collision boss and an abutment boss.

[0065] Optionally, the variable aperture drive motor further includes a plurality of magnetic conductive sheets 70 , each driving magnet 30 is provided with at least one magnetic conductive sheet 70 , the magnetic conductive sheet 70 is provided on the base assembly 10 , and the magnetic conductive sheet 70 is located on the side of the driving coil 40 away from the driving magnet 30 .

[0066] In a preferred embodiment of the present application, the magnetic conductive sheet 70 is arranged on the bottom surface of the base body 11, and the magnetic conductive sheet 70 is arranged on the outer surface of the base body 11. This arrangement can make the assembly of the variable aperture motor in the present application simpler. Of course, in the present application, at least a portion of the magnetic conductive sheet 70 can also be embedded in the interior of the base body 11. In addition, it should be noted that in the present application, the driving coil 40 is mainly arranged on the base body 11 in a flat manner. At this time, the driving coil 40 is parallel to the bottom surface of the base body 11, so the magnetic conductive sheet 70 can be arranged on the bottom surface of the base body 11. When the driving coil 40 is upright, the magnetic conductive sheet 70 can be arranged on the circumferential side wall of the base body 11. Of course, in the present application, when the setting method of the driving coil 40 changes, the setting method of the driving magnet 30 can also be changed accordingly.

[0067] Preferably, the number of the magnetic conductive sheets 70 is the same as the number of the driving magnets 30 and they are arranged in a one-to-one correspondence.

[0068] Optionally, the variable aperture drive motor also includes a top cover 80 and a gasket 90. The top cover 80 is arranged on the side of the upper cover 12 away from the base body 11. The top cover 80 and the base body 11 have at least one mutually cooperating fixing protrusion 81 and fixing groove 116. One of the fixing protrusion 81 and the fixing groove 116 is arranged on the top cover 80, and the other is arranged on the base body 11. The top cover 80 is provided with multiple positioning holes 82 corresponding to the positioning columns 117 of multiple base bodies 11; the gasket 90 is arranged on the side of the blade group 50 close to the lens support body 20.

[0069] Optionally, the driving magnet 30 includes at least one of a monopole magnet, a multipole magnet, and a Halbach array magnet.

[0070] Optionally, the variable aperture drive motor further includes a side steel sheet 100, and at least a portion of the side steel sheet 100 is made of a magnetic material. In the present application, the side steel sheet 100 can be arranged on the base body corresponding to the driving magnet and used for laser marking.

[0071] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0072] 1. Effectively solve the problem of poor performance of variable aperture drive devices in the prior art;

[0073] 2. Simple structure and stable performance.

[0074] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0075] 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, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0076] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0077] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A variable aperture drive motor, characterized in that: include: A base assembly (10), wherein the base assembly (10) has a receiving cavity; a lens support body (20), at least a portion of the lens support body (20) being movably disposed inside the accommodating cavity; A driving magnet (30), wherein the driving magnet (30) is in plurality and the plurality of driving magnets (30) are arranged on the circumferential side wall of the lens support body (20); a driving coil (40), wherein the driving coil (40) is multiple and the driving coil (40) is arranged on the base assembly (10) corresponding to the driving magnet (30), and the driving magnet (30) and the driving coil (40) are mutually induced to rotate the lens support body (20) relative to the base assembly (10); a blade assembly (50), wherein a first end of the blade assembly (50) is disposed on a top end of the base assembly (10), and a second end of the blade assembly (50) is connected to the lens support body (20) so that the second end of the blade assembly (50) can rotate relative to the first end of the blade assembly (50); A gear assembly (60), at least a portion of the gear assembly (60) is arranged on the lens support body (20), and at least another portion of the gear assembly (60) is arranged on the base assembly (10), and when the lens support body (20) rotates relative to the base assembly (10), the portion of the gear assembly (60) located on the lens support body (20) moves relative to the portion of the gear assembly (60) located on the base assembly (10).

2. The variable aperture drive motor according to claim 1, wherein: The gear assembly (60) comprises: a gear ring (61), the gear ring (61) being arranged around the circumferential outer side wall of the lens support body (20); a gear set (62), the gear set (62) being disposed on the base assembly (10) and meshing with the ring gear (61); When the lens support body (20) rotates relative to the base assembly (10), the gear set (62) moves relative to the gear ring (61) along the circumference of the gear ring (61).

3. The variable aperture drive motor according to claim 2, wherein: There are at least two gear sets (62), and the two gear sets (62) are arranged on the base assembly (10) at intervals.

4. The variable aperture drive motor according to claim 2, wherein: There are two driving magnets (30) and two driving coils (40), and the two driving magnets (30) are symmetrically arranged on the lens support body (20). The two gear sets (62) are symmetrically arranged on both sides of one of the drive coils (40); and / or The distances from the two gear sets (62) to one of the drive coils (40) are respectively smaller than the distances from the two gear sets (62) to the other drive coil (40).

5. The variable aperture drive motor according to claim 2, wherein: At least a portion of the gear ring (61) is embedded in the interior of the lens support body (20), and at least another portion of the gear ring (61) is exposed outside the lens support body (20).

6. The variable aperture drive motor according to claim 2, wherein: The gear set (62) includes: at least two bearings (621), wherein the two bearings (621) are spaced apart and arranged on the base assembly (10); An installation shaft (622), wherein both ends of the installation shaft (622) are respectively connected to different bearings (621); A gear body (623) is sleeved on the mounting shaft (622) and meshes with the gear ring (61).

7. The variable aperture drive motor according to claim 6, wherein: The axial direction of the mounting shaft (622) and the axial direction of the lens support body (20) are parallel to each other.

8. The variable aperture drive motor according to claim 6, wherein: At least one of the gear ring (61), the bearing (621), the mounting shaft (622), and the gear body (623) is made of at least one of ceramic and non-magnetic metal materials.

9. The variable aperture drive motor according to claim 2, wherein: The gear ring (61) is arranged on one side of the lens support body (20) close to the bottom end of the base assembly (10).

10. The variable aperture drive motor according to any one of claims 1 to 9, characterized in that: The variable aperture drive motor further includes an FPC board (200), the FPC board (200) being arranged around the circumferential outer side wall of the base assembly (10), and a conductive connector being embedded in the interior of the base assembly (10), and the drive coil (40) being electrically connected to the FPC board (200) via the conductive connector.

11. The variable aperture drive motor according to any one of claims 1 to 9, characterized in that: The base assembly (10) comprises: A base body (11), wherein the driving coil (40) is arranged on the base body (11); An upper cover (12) is provided on the top of the base body (11) and forms a receiving cavity with the base body (11); the blade assembly (50) is provided on a side of the upper cover (12) away from the lens support body (20); and a portion of the gear assembly (60) provided on the base assembly (10) is connected to the base body (11) and the upper cover (12), respectively.

12. The variable aperture drive motor according to claim 11, wherein: The blade group (50) includes a plurality of adjustment blades (51); the lens support (20) is provided with different toggle posts (21) corresponding to different adjustment blades (51); the upper cover (12) is provided with different rotation posts (121) corresponding to different adjustment blades (51); the adjustment blades (51) are respectively connected to the corresponding toggle posts (21) and the rotation posts (121) and can move together with the lens support (20); the upper cover (12) is provided with different blade steps (122) corresponding to different adjustment blades (51); the rotation posts (121) are provided on the blade steps (122); Two adjacent regulating blades (51) are stacked on each other, and the height of the blade step (122) corresponding to the regulating blade (51) located below is smaller than the height of the blade step (122) corresponding to the regulating blade (51) located above.

13. The variable aperture drive motor according to claim 11, wherein: The upper cover (12) has a plurality of mounting protrusions (123) on its periphery, the base body (11) is provided with a plurality of glue dispensing grooves (111) corresponding to the mounting protrusions (123), and each of the glue dispensing grooves (111) is provided with at least one mounting protrusion (123); and / or The upper cover (12) and the base body (11) have mutually matching clamping protrusions (124) and clamping grooves (112), one of the clamping protrusions (124) and the clamping grooves (112) is arranged on the upper cover (12), and the other is arranged on the base body (11), and the driving coil (40) is arranged in a space enclosed by the clamping protrusions (124) and the clamping grooves (112).

14. The variable aperture drive motor according to claim 11, wherein: The lens support body (20) has at least one abutting boss (22) and at least one anti-collision boss (23) extending toward the bottom surface of the base body (11) on a side away from the upper cover (12); the base body (11) is provided with at least one abutting surface (113) corresponding to the abutting boss (22); and the base body (11) is provided with at least one anti-collision surface (114) corresponding to the anti-collision boss (23). The thickness of the abutting boss (22) is smaller than the thickness of the anti-collision boss (23), and the distance from the abutting surface (113) to the upper cover (12) is smaller than the distance from the anti-collision surface (114) to the upper cover (12).

15. The variable aperture drive motor according to claim 14, wherein: The lens support body (20) has a plurality of spaced-apart limiting protrusions (24) on its circumference and extending toward the side wall of the base body (11), and each of the spaced-apart limiting protrusions (24) is provided with at least one abutting boss (22) and / or at least one anti-collision boss (23) on a side away from the upper cover (12), and the circumferential inner side wall of the base body (11) is provided with at least one stop boss (115) corresponding to the spaced-apart limiting protrusion (24), and the anti-collision boss (23) and the stop boss (115) are spaced-apart along the circumference of the base body (11).

16. The variable aperture drive motor according to claim 11, wherein: The variable aperture drive motor further comprises a plurality of magnetic conductive sheets (70), each of the drive magnets (30) being provided with at least one magnetic conductive sheet (70), the magnetic conductive sheet (70) being provided on the base assembly (10), and the magnetic conductive sheet (70) being located on a side of the drive coil (40) away from the drive magnet (30).

17. The variable aperture drive motor according to claim 12, wherein: The variable aperture drive motor further includes: A top cover (80), the top cover (80) being arranged on a side of the upper cover (12) away from the base body (11), the top cover (80) and the base body (11) having at least one mutually cooperating fixing protrusion (81) and fixing groove (116), one of the fixing protrusion (81) and the fixing groove (116) being arranged on the top cover (80), and the other being arranged on the base body (11), and the top cover (80) being provided with a plurality of positioning holes (82) corresponding to a plurality of positioning columns (117) of the base body (11); and / or A gasket (90) is provided on a side of the blade assembly (50) close to the lens support body (20).

18. The variable aperture drive motor according to any one of claims 1 to 9, characterized in that: The driving magnet (30) includes at least one of a monopole magnet, a multipole magnet, and a Halbach array magnet.

19. A camera device, characterized in that: The imaging device includes the iris drive motor according to any one of claims 1 to 18.

20. An electronic device, characterized in that: The electronic device includes the imaging device according to claim 19.

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