Imaging module and electronic apparatus

Abstract

To provide an imaging module in the technical field of imaging devices.SOLUTION: The magnetic force between a driving coil assembly and a driven magnetic member assembly is used to achieve non-contact driving of a shading blade by a blade driving mechanism, so that the blade driving mechanism and an autofocus mechanism operate independently of each other without interference. Moreover, since a cylinder, a lens, the driving coil assembly and a blade support member are all assembled along an optical axis, multi-directional protrusions of on the structure of the imaging module can be avoided. The structure of the imaging module provided according to the present invention is simpler and uses fewer components, and thus can reduce the assembly difficulty and manufacturing cost of the imaging module. The present application also discloses an electronic apparatus, which includes a device body and the imaging module arranged on the device body.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The embodiments of the present invention relate to the technical field of imaging devices, and in particular to imaging modules and electronic devices. [Background technology]

[0002] The aperture (variable aperture) is used to change the amount of light that enters the optical system and contributes to image formation. By providing an aperture to an imaging module, the size of the aperture can be adjusted, allowing the imaging module to meet the needs of shooting in scenes with different brightness levels. The focus mechanism allows the imaging module to focus by changing the position of the lens assembly, allowing the imaging module to capture objects more clearly. By utilizing the aperture and focus mechanism together, the imaging module's shooting performance can be improved. As a result, many consumers are pleased to apply imaging modules equipped with aperture and focus mechanisms to electronic devices such as smartphones and tablets.

[0003] The blade driving device changes the size of the opening surrounded by the blades by driving the blades to move, and can be applied to different optical units in a camera, such as a shutter, an aperture, or a filter. In an optical system in which the lens is moved and adjusted by a lens driving device, the blade driving device may hinder the operation and arrangement of the lens driving device due to factors such as size, weight, and protrusion in multiple directions due to the assembly direction. By using a small blade driving mechanism made of a shape memory metal, the problem of large weight and volume can be solved, but if it is necessary to have a large change in the size of the opening surrounded by the blades, the length of the shape memory metal must be increased. This still makes it impossible to effectively solve various problems caused by the large volume and weight of the blade driving mechanism.

[0004] In addition, it is necessary to avoid interference between the blade drive mechanism and the focus mechanism, and the blade drive mechanism needs to operate synchronously to appropriately block the light during the focusing process, so that such an installation may affect the servo control of the focus mechanism for the lens, and the weight of the blade drive mechanism needs to be distributed evenly around the entire circumference. This design is difficult, and the reliability of the product manufactured based on the above design cannot be ensured.

[0005] Therefore, there is an urgent need in this field to develop an imaging module that can solve the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0006] An embodiment of the present invention aims to provide an imaging module and electronic device that can simplify the structure of the imaging module, prevent the imaging module from protruding in multiple directions due to its structure, and prevent the autofocus mechanism and blade drive mechanism in the imaging module from interfering with each other. [Means for solving the problem]

[0007] In order to solve the above technical problems, in a first aspect of the present invention, there is provided an imaging module, the imaging module including: a lens; an autofocus mechanism including a cylinder, the axis of which overlaps with the optical axis of the lens, and the lens being housed in the cylinder; a drive coil assembly fixed to an inner wall of the cylinder; a blade support member installed coaxially with the lens and fixed to an object side of the lens; a blade follower ring installed coaxially with the lens and rotatably engaged with the object side of the blade support member; a driven magnetic member assembly fixed to the blade follower ring and installed opposite the drive coil assembly; and a light-shielding blade located between the blade support member and the blade follower ring and rotatably connected to the blade support member, the drive coil assembly drives the driven magnetic member assembly to rotate the blade follower ring about the optical axis as a rotation axis, and when the blade follower ring rotates, drives the light-shielding blade to shield or expose the lens.

[0008] In some embodiments, the driven magnetic member assembly includes a first magnetic member and a second magnetic member, the magnetic pole of the first magnetic member facing the drive coil assembly is different from the magnetic pole of the second magnetic member facing the drive coil assembly, the first magnetic member and the second magnetic member are circumferentially spaced apart around the optical axis, the drive coil assembly includes a plurality of drive coils, and the different drive coils generate magnetic fields of different directions when energized, such that the first magnetic member and the second magnetic member receive forces in the same direction to drive the vane driven ring to rotate about the optical axis as a rotation axis.

[0009] In some embodiments, the driven magnetic member assembly is multiple, the multiple driven magnetic member assemblies being spaced apart circumferentially around the vane driven ring, and the drive coil assembly is multiple, the multiple drive coil assemblies being spaced apart circumferentially around the cylinder.

[0010] In some embodiments, the drive coil assembly includes a pole coil and the driven magnetic member assembly includes a driven magnet steel, which when energized drives the driven magnet steel away from or toward the pole coil, and which rotates the vane driven ring to drive the light blocking vane to block or unblock the lens.

[0011] In some embodiments, the columnar coils are multiple and spaced apart along the circumferential direction of the cylinder, the driven magnet steels are multiple and spaced apart along the circumferential direction of the vane driven ring, and any two adjacent columnar coils generate magnetic fields of different directions when current is applied, such that the magnetic poles of any two adjacent driven magnet steels are opposite in the circumferential direction of the vane driven ring, and the driven magnet steels located between the two columnar coils receive forces in the same direction to drive the vane driven ring to rotate.

[0012] In some embodiments, the blade support member is provided with a positioning hole extending along the axial direction, and a positioning portion is provided on the image side of the light-shielding blade, and the positioning portion is rotatably inserted into the positioning hole.

[0013] In some embodiments, the blade follower ring is provided with a through groove extending along the radial direction of the blade follower ring, and a sliding portion is provided on the object side of the light-shielding blade, and the sliding portion is slidably inserted into the through groove.

[0014] In some embodiments, the device further includes a flexible substrate, the flexible substrate being fitted around an outer periphery of the cylinder and electrically connected to the drive coil assembly.

[0015] In some embodiments, the method further includes a position detection element, the position detection element being fixed to an inner wall of the cylinder and electrically connected to the flexible substrate, the position detection element being used to detect the position of the driven magnetic member assembly to detect the position of the light-shielding vane. Effect of the Invention

[0016] The imaging module according to the present invention includes a driving coil assembly provided on the inner wall of the cylinder of the autofocus mechanism, and a driven magnetic member assembly facing the driving coil assembly. The driven magnetic member assembly is provided on the blade driven ring, so that when the driving ring coil assembly operates the driven magnetic member assembly, the driven magnetic member assembly rotates the blade driven ring, causing the light-shielding blade to cover or expose the lens. That is, the Lorentz force between the driving coil assembly and the driven magnetic member assembly is utilized to realize non-contact driving of the light-shielding blade of the blade driving mechanism, so that the blade driving mechanism and the autofocus mechanism operate independently without interfering with each other. In addition, the cylinder, the lens, the driving coil assembly, and the blade support member are all assembled along the optical axis, so that the structure of the imaging module does not protrude in multiple directions. The structure of the imaging module provided by the present invention is simpler and uses fewer parts, which reduces the difficulty of assembling the imaging module and the manufacturing cost. [Brief description of the drawings]

[0017] One or more embodiments are illustratively illustrated in the accompanying drawing figures, but these illustrative illustrations are not intended to be limiting of the embodiments, in which like reference numbers represent like parts and, unless otherwise noted, the drawings are not drawn to scale. [Figure 1] FIG. 1 is a diagram showing a three-dimensional structure of an imaging module according to a first embodiment of the present invention. [Diagram 2]FIG. 2 is a front view of the imaging module according to the first embodiment of the present invention, in which the light-shielding blades expose the lenses. [Diagram 3] FIG. 3 is a front view of the imaging module according to the first embodiment of the present invention, in which the light-shielding blades are shielding the lens. [Figure 4] 4 is a diagram showing a cross section of an imaging module according to a first embodiment of the present invention. [Diagram 5] FIG. 5 is a diagram showing an exploded structure of the imaging module according to the first embodiment of the present invention. [Figure 6] FIG. 6 is a diagram showing a three-dimensional structure of a blade driven ring of the imaging module according to the first embodiment of the present invention. [Figure 7] FIG. 7 is a side view of a combination of a blade support member and a lens according to the first embodiment of the present invention. [Figure 8] FIG. 8 is a diagram showing a three-dimensional structure of a combination of a blade support member and a lens according to the first embodiment of the present invention. [Figure 9] FIG. 9 is a diagram showing the arrangement of a drive coil assembly and a driven magnetic member assembly according to the first embodiment of the present invention. [Figure 10] FIG. 10 is an enlarged view of area A in FIG. [Figure 11] FIG. 11 is a diagram showing a three-dimensional structure of an imaging module including an image stabilization mechanism according to a first embodiment of the present invention. [Figure 12] FIG. 12 is a diagram showing the arrangement of a drive coil assembly and a driven magnetic member assembly according to a second embodiment of the present invention. [Figure 13] FIG. 13 is a front view of an imaging module according to a third embodiment of the present invention in which the light-shielding blades expose the lens. [Figure 14] FIG. 14 is a front view of an imaging module according to a third embodiment of the present invention in which a light-shielding blade is shielding a lens. [Figure 15] FIG. 15 is a front view of an imaging module according to a fourth embodiment of the present invention in which the light-shielding blades expose the lens. [Figure 16]FIG. 16 is a front view of an imaging module according to a fourth embodiment of the present invention in which a light-shielding blade is shielding a lens. [Figure 17] FIG. 17 is a diagram showing the configuration of an electronic device according to a fifth embodiment of the present invention. [Explanation of symbols]

[0018] 1 Lens 11 Lens Assembly 12 Lens case 101 Drive coil assembly 1011 Drive coil 1012 Pillar coil 102 Blade support member 1021 Support ring part 1022 Support leg 1023 Positioning hole 1024 Regulatory Department 1025 Feather Cover 103 Wing follower ring 1031 Through groove 1032 Follower ring part 1033 Mounting holder 1034 Regulatory Framework 104 Driven Magnetic Member Assembly 1041 First magnetic member 1042 Second magnetic member 1043 Driven magnet steel 105 Shading feather 1051 Positioning part 1052 Sliding part 200 Autofocus mechanism 201 Cylinder 202 Flexible PCB 2021 Circumference 2022 Connection member 203 Position detection element 300 Image stabilization mechanism 301 Sensor 500 Imaging module 500 Electronic equipment 510 Device body DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] In order to clarify the purpose, technical ideas and advantages of the embodiments of the present invention, the following detailed description of each embodiment of the present invention will be given with reference to the drawings. However, in each embodiment of the present invention, many technical details are described to allow the reader to fully understand the present invention, but it is obvious to those skilled in the art that the technical solution protected by the present invention can be realized without these technical details and various changes and modifications based on the following embodiments.

[0020] In the embodiments of the present invention, the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are orientations or positional relationships indicated based on the drawings. These terms are primarily intended to better explain the present invention and its embodiments, and are not used to limit that the indicated devices, units or components must have a specific orientation or be configured and operated in a specific orientation.

[0021] In addition, some of the above terms can be used to express other meanings in addition to expressing an orientation or positional relationship. For example, the term "up" can also be used to express a dependency or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the present invention according to specific situations.

[0022] Furthermore, the terms "attach", "install", "installed", "established", "connected" and "connected" should be understood in a broad sense. For example, they may be fixed connections, removable connections, or integral structures, mechanical connections, or electrical connections, and may be direct connections, indirect connections through intermediate media, or internal communication between two devices, units or components. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0023] Furthermore, the terms "first", "second", etc. are primarily used to distinguish between different devices, units or components (which may be of the same or different specific type and configuration) and are not intended to state or imply the relative importance or quantity of the designated devices, units or components. Unless otherwise specified, "plurality" means two or more.

[0024] As shown in FIGS. 1 to 5, a first embodiment of the present invention provides an imaging module 400. The imaging module 400 includes an autofocus mechanism 200 including a lens 1 and a cylinder 201, the axis of the cylinder 201 overlapping with an optical axis LA of the lens 1, the lens 1 being accommodated in the cylinder 201, a drive coil assembly 101 fixed to an inner wall of the cylinder 201, a blade support member 102 that is coaxially disposed with the lens 1 and fixed to the object side of the lens 1, and a blade driven ring 102 that is coaxially disposed with the lens 1 and rotatably engaged with the object side of the blade support member 102. 03, a driven magnetic member assembly 104 fixed to the blade driven ring 103 and installed opposite the driving coil assembly 101, and a light-shielding vane 105 located between the blade support member 102 and the blade driven ring 103 and rotatably connected to the blade support member 102. The driving coil assembly 101 drives the driven magnetic member assembly 104 to rotate the blade driven ring 103 about the optical axis LA as a rotation axis, and drives the light-shielding vane 105 to shield or expose the lens 1 when the blade driven ring 103 rotates.

[0025] In the imaging module 400 provided by the present invention, the driving coil assembly 101 is provided on the inner wall of the cylinder 201 of the autofocus mechanism 200, and the driven magnetic member assembly 104 is provided facing the driving coil assembly 101. Since the driven magnetic member assembly 104 is provided on the blade driven ring 103, when the driving ring coil assembly 101 operates the driven magnetic member assembly 104, the driven magnetic member assembly 104 rotates the blade driven ring 103, causing the light-shielding blade 105 to shield or expose the lens 1. In other words, the Lorentz force between the driving coil assembly 101 and the driven magnetic member assembly 104 is utilized to realize non-contact driving of the blade driving mechanism with respect to the light-shielding blade 105, and the blade driving mechanism and the autofocus mechanism 200 operate independently without interfering with each other. In addition, since the cylinder 201, lens 1, driving coil assembly 101 and blade support member 102 are all assembled along the direction of the optical axis LA, it is possible to avoid protrusions in multiple directions in the structure of the imaging module 400. The structure of the imaging module 400 provided by the present invention is simpler and uses fewer parts, which can reduce the difficulty of assembling the imaging module 400 and the manufacturing cost.

[0026] It should be noted that the light-shielding fins 105 do not completely shield the lens 1, i.e., when the light-shielding fins 105 reach their maximum shielding area relative to the lens 1, a part of the area of ​​the lens 1 may still be exposed. It can be understood that, if necessary, the light-shielding fins 105 may completely shield the lens 1 when they reach their maximum shielding area relative to the lens 1.

[0027] In this embodiment, the lens 1 includes a lens assembly 11 and a lens case 12, and the lens case 12 surrounds the lens assembly 11 and is fixed to the outer edge of the lens assembly 11. There is a gap between the lens case 12 and the cylinder 201, and both the driving coil assembly 101 and the driven magnetic member assembly 104 are located in this gap.

[0028] 7 and 8, in this embodiment, the blade support member 102 includes a support ring portion 1021 and a plurality of support legs 1022 fixedly connected to the support ring portion 1021, the plurality of support legs 1022 are installed at intervals along the circumferential direction of the support ring portion 1021 and extend along the direction of the optical axis LA, and one end of each of the plurality of support legs 1022 remote from the support ring portion 1021 is held in contact with the lens case 12, thereby providing an appropriate pitch between the support ring portion 1021 and the edge of the lens 1 on the object side in the direction of the optical axis LA. In some embodiments, the support ring portion 1021 and the plurality of support legs 1022 are integrally molded.

[0029] Optionally, the support legs 1022 may be two, three or more, for example, four as shown in Figures 5, 7 and 8, and the specific dimensions and number thereof can be adaptively adjusted according to the actual dimensions of the imaging module 400 and the counterweight requirements, and are not specifically limited herein.

[0030] In another replaceable embodiment, the blade support member 102 and the lens case 12 are integrally molded. This can reduce the process of fixing the blade support member 102 to the lens 1 when assembling the imaging module 400, for example, by fixing the blade follower ring 103, on which the light-shielding blade 105 or the follower magnetic member assembly 104 is already provided, to the blade support member 102.

[0031] Furthermore, the blade support member 102 is provided with a positioning hole 1023 extending along the axial direction, and a positioning portion 1051 is provided on the image side of the light-shielding blade 105, and the positioning portion 1051 is rotatably inserted into the positioning hole 1023. Specifically, the support ring portion 1021 of the blade support member 102 can be provided with a plurality of positioning holes 1023, for example, five as shown in Fig. 8, and the positioning holes 1023 are circular holes, and the five circular holes 1023 are provided at uniform intervals along the circumferential direction of the support ring portion 1021. At the same time, five light-shielding blades 105 are provided correspondingly, and one positioning portion 1051 is provided on the image side of each of the light-shielding blades 105. The positioning portion 1051 has a cylindrical structure, and the positioning portion 1051 fits into the positioning hole 1023 in a one-to-one correspondence, so that each light-shielding blade 105 can rotate relative to the support ring portion 1021 with the axis of its own positioning portion 1051 as the rotation axis.

[0032] 5 and 6, the blade driven ring 103 is further provided with a through groove 1031, which extends along the radial direction of the blade driven ring 103, and a sliding portion 1052 is provided on the object side of the light-shielding blade 105, which slides into the through groove 1031. As can be seen, when there are five light-shielding blades 105, five through grooves 1031 are also provided, and the five through grooves 1031 are uniformly spaced apart along the circumferential direction of the blade driven ring 103. One of the sliding portions 1052 is provided on each object side of each light-shielding blade 105, and the sliding portion 1052 slides into the through groove 1031 in one-to-one correspondence.

[0033] 6, specifically, the blade driven ring 103 includes a driven ring portion 1032 and a mounting holder 1033 that fixedly connects the driven ring portion 1032, and the mounting holder 1033 extends along the optical axis LA toward the lens 1. The through groove 1031 is provided in the driven ring portion 1032, and the driven magnetic member assembly 104 is provided in the mounting holder 1033.

[0034] In this embodiment, the light-shielding vane 105 may be in the form of a bow-shaped sheet, the positioning portion 1051 being provided at one end of the bow-shaped sheet, and the sliding portion 1052 being provided at the other end of the bow-shaped sheet. There is an appropriate gap between the vane support member 102 and the vane driven ring 103, and the vane support member 102 and the vane driven ring 103 form a vane chamber for accommodating the light-shielding vane 105.

[0035] When the driving coil assembly 101 is energized, the Lorentz force drives the driven magnetic member assembly 104 to move, and the driven magnetic member assembly 104 drives the blade driven ring 103 to rotate, and the sliding part 1052 moves under the action of the inner wall of the through groove 1031. Since the light-shielding blade 105 can only rotate while being restricted by the positioning part 1051, the sliding part 1052 slides in the through groove 1031 to gather or separate the plurality of light-shielding blades 105. When the plurality of light-shielding blades 105 are gathered, the area of ​​the through hole surrounded by the plurality of light-shielding blades 105 becomes smaller, which shields the lens 1 and reduces the amount of light incident on the lens 1 from the outside. When the plurality of light-shielding vanes 105 are separated, the area of ​​the through hole surrounded by the plurality of light-shielding vanes 105 becomes larger, exposing the lens 1 and increasing the amount of light incident on the lens 1 from the outside world.

[0036] The shape of the sliding part 1052 is not particularly limited as long as it can slide in the through groove 1031, and may be, for example, a protrusion, a rectangular column, or a cylinder. In practical applications, it is optimal to set the sliding part 1052 to be cylindrical in consideration of the influence of friction. Since the sliding part 1052 can move smoothly in the through groove 1031, the light-shielding blade 105 can form a light-passing hole of any size within a preset range, thereby forming an optimal light-shielding effect and improving the shooting performance of the imaging module 400.

[0037] Usually, the more the number of the light shielding vanes 105, the closer the through hole surrounded by the light shielding vanes 105 becomes to a circle, and the more accurate the light control becomes. However, when considering the counterweight, the number of the light shielding vanes 105 is often set to 3 to 7, and in this embodiment, it is 5. Similarly, considering the problem of the counterweight, the length of one light shielding vane 105 is set between 30% to 60% of the circumference of the support ring part 1021. If the length of the light shielding vane 105 exceeds 60% of the circumference of the support ring part 1021, the proportion of the counterweight that constitutes the aperture by the light shielding vane 105 is large, so the center of gravity of the imaging module 400 becomes high when the lens 1 is driven. If the length of the light shielding vane 105 is less than 30% of the circumference of the support ring part 1021, there is a risk that the ends of the different light shielding vanes 105 may interfere with each other during the movement of the light shielding vanes 105. That is, one end of the light-shielding vane 105 where the positioning portion 1051 is provided and one end of the adjacent light-shielding vane 105 where the sliding portion 1052 is provided interfere with each other during movement.

[0038] Similarly, the area of ​​the through-hole surrounded by the light-shielding vanes 105 is 30% to 60% of the pattern area that can be covered by the outer edge of the light-shielding vanes 105. This ensures that the imaging module 400 has a small overall weight and is easy to assemble, and also prevents interference between the light-shielding vanes 105.

[0039] As shown in Figure 8, in this embodiment, in order to regulate the position of the driven ring portion 1032 in a direction perpendicular to the optical axis LA, a plurality of regulating portions 1024 are provided along the circumferential direction of the support ring portion 1021, and the regulating portions 1024 are arc segments having an L-shaped cross section. When the driven ring portion 1032 is engaged with the support ring portion 1021, the plurality of regulating portions 1024 are positioned on the outer edge of the driven ring portion 1032, preventing the driven ring portion 1032 from moving along a direction perpendicular to the optical axis LA when the driven ring portion 1032 is driven or when the imaging module 400 vibrates.

[0040] 1 and 5, the imaging module 400 further includes a blade cover 1025 which is a circular sheet, the blade cover 1025 is provided on the object side of the driven ring part 1032, and the plurality of restricting parts 1024 are located on the outer edge of the driven ring part 1032. The plurality of restricting parts 1024 can prevent the blade cover 1025 from moving along a direction perpendicular to the optical axis LA, and at the same time, the plurality of restricting parts 1024, together with the blade cover 1025, can limit the position of the driven ring part 1032 in the direction of the optical axis LA, and can prevent the driven ring part 1032 from escaping from the support ring part 1021.

[0041] As shown in Figures 9 and 10, in this embodiment, the driven magnetic member assembly 104 includes a first magnetic member 1041 and a second magnetic member 1042, and the magnetic pole of the first magnetic member 1041 facing the drive coil assembly 101 is different from the magnetic pole of the second magnetic member 1042 facing the drive coil assembly 101, the first magnetic member 1041 and the second magnetic member 1042 are installed circumferentially spaced apart around the optical axis LA, the drive coil assembly 101 includes a plurality of drive coils 1011, and the different drive coils 1011 generate magnetic fields of different directions when current is applied, so that the first magnetic member 1041 and the second magnetic member 1042 receive forces in the same direction to drive the blade driven ring 103 to rotate around the optical axis LA as a rotation axis.

[0042] 10, the drive coil assembly 101 may include three drive coils 1011. Each drive coil 1011 may be a coil wound in an overall elliptical or capsule shape, with its annular plane facing the lens 1. More specifically, the drive coil 1011 located on the left side may be wound in a counterclockwise direction, and the drive coils 1011 located in the middle and right side are wound in a clockwise direction. The mounting holder 1033 has a portion extending along the circumferential direction of the blade driven ring 103, and the first magnetic member 1041 and the second magnetic member 1042 are fixedly installed at opposite ends of this portion in the circumferential direction of the blade driven ring 103, and the S pole of the first magnetic member 1041 faces the lens 1, the N pole of the first magnetic member faces the driving coil 1011, the S pole of the second magnetic member 1042 faces the driving coil 1011, and the N pole of the second magnetic member 1042 faces the lens 1.

[0043] When the driving coil 1011 is energized, for example, the current direction and the coil winding direction of the driving coil 1011 located on the left side are the same and are counterclockwise, while the current direction and the coil winding direction of the driving coil 1011 located in the middle and the driving coil 1011 located on the right side are the same and are all clockwise. At this time, the S pole of the magnetic field generated in the left driving coil 1011 faces the lens 1, that is, the S pole of the magnetic field of the driving coil 1011 located on the left side faces the N pole of the first magnetic member 1041, and the N pole of the magnetic field of the driving coil 1011 located in the middle faces the S pole of the second magnetic member 1042, and the N pole of the magnetic field generated in the driving coil on the right side faces the S pole of the second magnetic member 1042. As a result, the driving coil 1011 on the left side attracts the first magnetic member 1041, the driving coil 1011 located in the middle repels the first magnetic member 1041 and at the same time attracts the second magnetic member 1042, and the driving coil 1011 located on the right side attracts the second magnetic member 1042, and finally the first magnetic member 1041 and the second magnetic member 1042 rotate counterclockwise around the optical axis LA as a rotation axis. Since the first magnetic member 1041 and the second magnetic member 1042 are fixed to the blade driven ring 103, the blade driven ring 103 rotates counterclockwise around the optical axis LA as a rotation axis, and thus drives the light blocking blade 105 to rotate, and the light blocking blade 105 blocks the lens 1.

[0044] As can be seen, changing the direction of the current in the drive coil 1011 causes the blade driven ring 103 to rotate clockwise around the optical axis LA as the axis of rotation, thereby driving the light shielding blade 105 to rotate, and the light shielding blade 105 to expose the lens 1.

[0045] The light-shielding vane 105 can be installed so that when the vane driven ring 103 rotates clockwise, the light-shielding vane 105 is rotated to cover the lens 1, and when the vane driven ring 103 rotates counterclockwise, the light-shielding vane 105 is rotated to expose the lens 1. The winding directions of the different driving coils 1011 may be the same or different, as long as the directions of the currents flowing through the different driving coils 1011 are different. For example, if the winding directions of all the driving coils 1011 are the same, currents of different directions can be passed through the different driving coils 1011 when energized, or if the winding directions of the different driving coils 1011 are different, currents of the same direction can be passed, and different winding directions produce effects of different directions in the driving coils 1011 to which currents are different. The magnetic pole directions of the first magnetic member 1041 and the second magnetic member 1042 can also be adjusted. Specifically, the Lorentz force characteristics can be combined and adjusted according to actual needs, but a description thereof will be omitted here.

[0046] In this embodiment, the driven magnetic member assemblies 104 are provided in plurality, and the driven magnetic member assemblies 104 are installed at intervals along the circumferential direction of the blade driven ring 103, and the driving coil assemblies 101 are provided in plurality, and the driving coil assemblies 101 are installed at intervals along the circumferential direction of the cylinder 201. Specifically, when the driving coil assemblies 101 and the driven magnetic member assemblies 104 are provided in plurality, they can be provided in one-to-one correspondence with uniform intervals in the circumferential direction surrounding the optical axis LA. For example, four can be provided, and the four driving coil assemblies 101 can be installed symmetrically around the optical axis LA. The same applies to the four driven magnetic member assemblies 104.

[0047] By providing multiple driving coil assemblies 101 and multiple driven magnetic member assemblies 104, a uniform force can be applied in the circumferential direction of the driven ring portion 1032, making the rotation of the driven ring portion 1032 more stable and providing a greater driving force, making it easier to drive the rotation of the driven ring portion 1032.

[0048] As shown in Figures 5 and 11, in this embodiment, the imaging module 400 further includes a flexible substrate 202, which is fitted around the outer periphery of the cylinder 201 and is electrically connected to the driving coil assembly 101.

[0049] Specifically, the flexible substrate 202 includes a circumferential portion 2021 fitted around the outer periphery of the cylinder 201, and a connection portion 2022 connected to the circumferential portion 2021 and electrically connecting the circumferential portion 2021 to a control chip (not shown), and the control chip provides electrical energy and control signals to the driving coil assembly 101 via the flexible substrate 202, and the driving coil assembly 101 generates corresponding magnetic fields based on the electrical energy and control signals received, and drives the magnetic module 104 through these magnetic fields to rotate the vane driven ring 103.

[0050] As shown in FIG. 5, in this embodiment, the imaging module 400 further includes a position detection element 203, which is fixed to the inner wall of the cylinder 201 and electrically connected to the flexible substrate 202, and the position detection element 203 is used to detect the position of the driven magnetic member assembly 104, so as to detect the position of the light-shielding vane 105.

[0051] Specifically, the position detection element 203 may be a Hall element. When the first magnetic member 1041 and the second magnetic member 1042 are driven by the driving coil 1011 to rotate, the magnetic field at the position of the first magnetic member 1041 and the second magnetic member 1042 where the position detection element 203 exists changes constantly, and the position detection element 203 detects these changes to obtain the position of the first magnetic member 1041 and the second magnetic member 1042 or the position of either one of them. Then, the correspondence relationship between the rotation angle of the blade driven ring 103 and the change in the area of ​​the through hole surrounded by the blade driven ring 103 is set in advance, that is, the area of ​​the through hole surrounded by the light-shielding blade 105 can be calculated by detecting the position of the first magnetic member 1041 and / or the second magnetic member 1042.

[0052] In some interchangeable embodiments, the flexible substrate 202 may be provided within the autofocus mechanism 200 and may further extend from within the autofocus mechanism 200 and be electrically connected to the drive coil assembly 101 and the position detection element 203.

[0053] As shown in FIG. 11 , in this embodiment, the imaging module 400 further includes an image stabilization mechanism 300, which is provided on the image side of the autofocus mechanism 200 and is used to realize image stabilization of the imaging module 400.

[0054] Specifically, the imaging module 400 includes a sensor 301, which is disposed on the object side of the image stabilization mechanism 300 and is used for imaging. The image stabilization mechanism 300 realizes image stabilization by driving the sensor 301 to move.

[0055] In this embodiment, the imaging module case further includes an imaging module case (not shown), in which at least the blade cover 1025, the blade driven ring 103 and the light-shielding blade 105 are housed, and the imaging module case presses and holds the blade cover 1025, and fixes the blade cover 1025 along the extension direction of the optical axis LA on the object side of the blade cover 1025.

[0056] In the second embodiment of the present invention, an imaging module is provided, which is almost the same as the first embodiment, and the main difference between the first embodiment and the second embodiment is that the arrangement of the driving coil assembly 101 and the driven magnetic member assembly 104 is simplified as shown in Fig. 12. Specifically, the driving coil assembly 101 includes a columnar coil 1012, and the driven magnetic member assembly 104 includes a driven magnet steel 1043, and the columnar coil 1012 drives the driven magnet steel 1043 to move away from or approach the columnar coil 1012 when energized, and the driven magnet steel 1043 rotates the blade driven ring 103 to drive the light shielding blade 105 to shield or expose the lens 1.

[0057] Here, the driving coil assembly 101 includes one of the columnar coils 1012, the axis of which is perpendicular to the optical axis LA, and when the columnar coil 1012 is energized, the generated magnetic field exerts a magnetic force on the driven magnet steel 1043, causing the driven magnet steel 1043 to move away from or approach the columnar coil 1012, thereby rotating the blade driven ring 103, and rotating the blade driven ring 103 causes the light-shielding blades 105 to move together or apart. By installing them in this way, the structure of the driving coil assembly 101 and the driven magnetic member assembly 104 can be simplified, the number of parts can be reduced, and the difficulty of assembling the imaging module and the manufacturing cost can be reduced.

[0058] In this embodiment, there are a plurality of the columnar coils 1012, which are arranged at intervals along the circumferential direction of the cylinder 201, and there are a plurality of the driven magnet steels 1043, which are arranged at intervals along the circumferential direction of the vane driven ring 103. The magnetic poles of any two adjacent driven magnet steels 1043 are oppositely oriented in the circumferential direction of the vane driven ring 103, and the driven magnet steels 1043 located between the two columnar coils 1012 receive forces in the same direction, causing the vane driven ring 103 to rotate. When electricity is applied, any two adjacent columnar coils 1012 generate magnetic fields of different directions.

[0059] An example will be described in which all the columnar coils 1012 have the same winding direction and the clockwise direction is the positive direction. Specifically, the N pole of the driven magnet steel 1043 located at the top is arranged along the positive direction with respect to its own S pole, and the N pole of the driven magnet steel 1043 located on the left side is arranged in the opposite direction with respect to its own S pole. The columnar coil 1012 located on the upper right side is in the positive direction with respect to the driven magnet steel 1043 located above, and currents of different directions are provided to the columnar coil 1012 located on the upper right side and the columnar coil 1012 located on the left side, for example, as shown by the arrows next to the columnar coil 1012 in the figure. In this case, the columnar coil 1012 located on the upper right side generates a magnetic field in which the N pole faces in the opposite direction, and the columnar coil 1012 located on the left side generates a magnetic field in which the N pole faces in the positive direction. In this case, the N pole of the magnetic field of the columnar coil 1012 located on the upper right side faces the N pole of the driven magnet steel 1043 located above, thereby rotating the driven magnet steel 1043 in the reverse direction, and at the same time, the N pole of the magnetic field of the columnar coil 1012 located on the left side faces the S pole of the driven magnet steel 1043 located above, thereby driving the driven magnet steel 1043 to rotate in the reverse direction, and also the S pole of the magnetic field of the columnar coil 1012 located on the left side faces the S pole of the driven magnet steel 1043 located on the left side, thereby driving the driven magnet steel 1043 located on the left side to rotate in the reverse direction. In other words, one of the columnar coils 1012 rotates one of the driven magnet steel pieces 1043 in the opposite direction by utilizing the repulsive force of an isotropic magnetic field, and the other columnar coil 1012 drives the driven magnet steel piece 1043 to continue rotating in the opposite direction by utilizing the attractive force of an anisotropic magnetic field.

[0060] As can be understood, in this embodiment, the two adjacent columnar coils 1012 mainly apply forces in the same direction to both magnetic poles of the driven magnet steel 1043 located between the two columnar coils 1012, so that the driven magnet steel 1043 drives the blade driven ring 103 to rotate. The specific winding direction of the columnar coil 1012, the specific current supply method, and the specific installation method of the driven magnet steel 1043 can be adaptively adjusted according to the actual situation. In this embodiment, there is no specific limitation thereon.

[0061] The third embodiment of the present invention provides an imaging module. This embodiment is almost the same as the first embodiment, and the main difference is that the number of the light-shielding vanes 105 is reduced, as shown in Figs. 13 and 14. In this embodiment, there are two light-shielding vanes 105, and there are also two driving coil assemblies 101 and two driven magnetic member assemblies 104, and the light-shielding vanes 105 are spaced apart from the driving coil assembly 101 and the driven magnetic member assembly 104 along the optical axis LA. This embodiment reduces the numbers of the driving coil assemblies 101, the driven magnetic member assemblies 104, and the light-shielding vanes 105, simplifying the structure of the imaging module and reducing the difficulty of assembling the imaging module.

[0062] Since there are two light-shielding vanes 105 in this embodiment, the positioning holes 1023 in the support ring part 1021 can be adaptively set to two, and the through grooves 1031 in the driven ring part 1032 can also be set to two. In addition, in order to make the counterweight of the imaging module more rational, the two positioning holes 1023 can be symmetrically set in the support ring part 1021 and the two through grooves 1031 can be symmetrically set in the driven ring part 1032 with the optical axis LA as the axis of symmetry. In this way, after the light-shielding vanes 105 are assembled, the positions of the two light-shielding vanes 105 are rotatably and symmetrically set.

[0063] In this embodiment, the shape of the light-shielding vane 105 may be J-shaped, and the positioning portion 1051 and the sliding portion 1052 are both provided at the end of the straight portion of the light-shielding vane 105 away from the bent portion, but are offset from each other on a plane perpendicular to the optical axis LA. Here, the inner edge of the bent portion of the light-shielding vane 105 is an arc segment, and when the two light-shielding vanes 105 are completely gathered together, the inner edges of the bent portions of the two light-shielding vanes 105 form a circular hole, and the center of this circular hole is approximately on the optical axis LA, i.e., the center of the circle may be on the optical axis LA or may be near the optical axis LA. The light-shielding vane 105 is disposed at a distance from the driving coil assembly 101 and the driven magnetic member assembly 104 along the optical axis LA, i.e., the light-shielding vane 105 is located on the object side of the driving coil assembly 101 and the driven magnetic member assembly 104. Therefore, when the light-shielding vane 105 rotates, neither the driving coil assembly 101 nor the driven magnetic member assembly 104 interferes with the light-shielding vane 105, and the weight of the entire imaging module can be distributed along the optical axis LA.

[0064] By installing it in this manner, it is possible to change the amount of light incident on the imaging module as desired even during dynamic shooting, thereby improving the optical performance of the imaging module and accurately controlling the exposure, thereby effectively suppressing dead pixels in the image during shooting.

[0065] Furthermore, in this embodiment, since the free end (i.e., the bent portion) of the light-shielding vane 105 has a large range of motion, in order to prevent the light-shielding vane 105 from escaping and to avoid damage to the imaging module due to an excessively large rotation range, a spindle-shaped regulating frame 1034 is provided on the image side of the driven ring portion 1032, so that the contour of the inner edge of the tip of the regulating frame 1034 matches the contour of the outer edge of the light-shielding vane 105. Note that the "tip" in this embodiment refers to a portion of the spindle-shaped regulating frame 1034 with a small radius of curvature.

[0066] The fourth embodiment of the present invention provides an imaging module. This embodiment is similar to the third embodiment, and the main difference is that the number of the light shielding vanes 105 is further reduced, as shown in Figures 15 and 16. In this embodiment, there is one light shielding vane 105, one driving coil assembly 101, and one driven magnetic member assembly 104.

[0067] In this embodiment, the light-shielding vane 105 is generally drop-shaped, and the positioning portion 1051 and the sliding portion 1052 are both provided at the end of the light-shielding vane 105 with a smaller radius of curvature, and are offset from each other on a plane perpendicular to the optical axis LA. A circular hole is provided at the portion of the light-shielding vane 105 with a larger radius of curvature, and when the light-shielding vane 105 reaches the maximum shielding area with respect to the lens 1, the center of the circular hole is approximately on the optical axis LA, that is, the center of the circle may be on the optical axis LA or may be near the optical axis LA.

[0068] Furthermore, the regulation frame 1034 is also adjusted to a water drop-shaped limiting frame that matches the shape of the light-shielding blade 105 .

[0069] In this embodiment, the number of the driving coil assemblies 101, the driven magnetic member assemblies 104, and the light-shielding vanes 105 can be further reduced, thereby simplifying the structure of the imaging module and reducing the difficulty of assembling the imaging module.

[0070] As shown in FIG. 17, a fifth embodiment of the present invention provides an electronic device 500 comprising an equipment body 510 and an imaging module 400 described in any of the above embodiments, wherein the imaging module 400 is provided in the equipment body 510.

[0071] In this embodiment, the electronic device 500 may be a smartphone, a tablet, a smart watch, a camera, or other electronic device equipped with the imaging module of the present invention, and the present invention is not particularly limited thereto.

[0072] The imaging module and electronic device according to the embodiment of the present invention have been described in detail above. In this specification, the principle and embodiment of the present invention are described using specific examples, but the description of the above embodiments is only used to help understand the idea of ​​the present invention, and there are changes in both specific embodiments and application scope. In short, the contents of this specification should not be understood as limiting the present invention.

Claims

1. Lenses and an autofocus mechanism including a cylinder, the axis of the cylinder overlapping with an optical axis of the lens, and the lens being housed in the cylinder; a drive coil assembly secured to an inner wall of the cylinder; a blade support member that is coaxially disposed with the lens and fixed to the object side of the lens; a blade follower ring that is coaxially disposed with the lens and rotatably engaged with an object side of the blade support member; a driven magnetic member assembly fixed to the vane driven ring and disposed opposite the drive coil assembly; a light-shielding vane located between the vane support member and the vane driven ring and pivotally connected to the vane support member; the driving coil assembly drives the driven magnetic member assembly to rotate the vane driven ring about the optical axis as a rotation axis, and drives the light blocking vane to block or expose the lens when the vane driven ring rotates. An imaging module comprising:

2. the driven magnetic member assembly includes a first magnetic member and a second magnetic member, the magnetic pole of the first magnetic member facing the drive coil assembly is different from the magnetic pole of the second magnetic member facing the drive coil assembly, the first magnetic member and the second magnetic member are installed around the optical axis at intervals in the circumferential direction, the drive coil assembly includes a plurality of drive coils, the different drive coils generate magnetic fields of different directions when energized, so that the first magnetic member and the second magnetic member receive forces in the same direction to drive the vane driven ring to rotate about the optical axis as a rotation axis, The imaging module according to claim 1 .

3. the driven magnetic member assemblies are multiple, the multiple driven magnetic member assemblies are spaced apart along the circumferential direction of the blade driven ring, the drive coil assemblies are multiple, the multiple drive coil assemblies are spaced apart along the circumferential direction of the cylinder, 3. The imaging module according to claim 2.

4. The driving coil assembly includes a columnar coil, and the driven magnetic member assembly includes a driven magnet steel, and the columnar coil drives the driven magnet steel to move away from or toward the columnar coil when energized, and the driven magnet steel rotates the vane driven ring to drive the light shielding vane to shield or expose the lens. The imaging module according to claim 1 .

5. the columnar coils are provided in a plurality of numbers and are arranged at intervals along the circumferential direction of the cylinder, the driven magnet steels are provided in a plurality of numbers and are arranged at intervals along the circumferential direction of the vane driven ring, the magnetic poles of any two adjacent ones of the driven magnet steels are opposite in the circumferential direction of the vane driven ring, and any two adjacent ones of the columnar coils generate magnetic fields of different directions when energized, so that the driven magnet steels located between the two columnar coils receive forces in the same direction to drive the vane driven ring to rotate; 5. The imaging module according to claim 4.

6. The blade support member is provided with a positioning hole extending along an axial direction, and a positioning portion is provided on an image side of the light-shielding blade, and the positioning portion is rotatably inserted into the positioning hole. The imaging module according to claim 1 .

7. The blade driven ring is provided with a through groove, the through groove extending along a radial direction of the blade driven ring, and a sliding portion is provided on an object side of the light-shielding blade, and the sliding portion is slidably inserted into the through groove.

7. The imaging module according to claim 6.

8. The flexible substrate is fitted around the outer periphery of the cylinder and is electrically connected to the drive coil assembly. The imaging module according to claim 1 .

9. and a position detection element, the position detection element being fixed to an inner wall of the cylinder and electrically connected to the flexible substrate, the position detection element being used to detect the position of the driven magnetic member assembly so as to detect the position of the light shielding vane. The imaging module according to claim 8 .

10. A device body and an imaging module according to any one of claims 1 to 9, wherein the imaging module is provided in the device body.

1. An electronic device comprising:

Images