Variable diaphragm, imaging module and electronic apparatus

Abstract

To disclose a variable diaphragm related to a technical field of an imaging apparatus.SOLUTION: A blade support ring and a blade drive ring cooperate to movably fix light shield blades, an electromagnetic driving component drives a driving lever to rotate with respect to a base by a Lorentz force between a driving magnet and a driving coil, the driving lever is slidably connected to the blade drive ring to rotate the blade drive ring, and eventually the blade drive ring drives to rotate the light shield blades and then shields or exposes a lens of an imaging module. Thus, by making a throttle part and an electromagnetic driving component independent from the lens, counter weight of the imaging module is optimized, and load on an autofocus mechanism can be reduced. At the same time, because the whole body is installed independently, electric wiring of the electromagnetic driving component can be installed around the lens and does not affect focus operation of the lens. The imaging module and an electronic apparatus are disclosed as well.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of imaging devices, and more particularly to a variable aperture, an imaging module, and an electronic device. [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 imaging module can respond to shooting needs in scenes with different brightness by adjusting the size of the aperture, and the focus mechanism realizes the focus of the imaging module by changing the position of the lens assembly, allowing the imaging module to shoot the subject more clearly. By utilizing the aperture and focus mechanism together, the shooting performance of the imaging module can be improved. As a result, many consumers are happy 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 the conventional variable aperture, the corresponding driving mechanism is provided on the lens and located on the object side of the lens, so that the counterweight on the object side of the lens becomes large, and the lens is easily tilted, which affects the focus drive of the lens. When a leaf spring is used, the hardness of the leaf spring needs to be increased to support the lens with the variable aperture. Even if the leaf spring is not used, the focus mechanism needs to provide the same level of holding force. In addition, an electric wiring needs to be provided inside to drive the variable aperture, and it is necessary to ensure that the electric wiring does not affect the focus. This makes it difficult to design the entire invention.

[0004] Therefore, there is a need in the art for a variable aperture to solve the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of an embodiment of the present invention is to provide a variable aperture that can optimize the counterweight of an imaging module and prevent interference with focus driving of the imaging module. [Means for solving the problem]

[0006] In order to solve the above technical problems, the present invention provides a variable aperture, which includes a light-shielding vane, a vane support ring, a vane drive ring, and an electromagnetic driving component, the light-shielding vane is rotatably fixed to the vane support ring, the vane drive ring is coaxial with the vane support ring and is fixed to the object side of the vane support ring, the vane drive ring is rotatable relative to the vane support ring, the light-shielding vane is slidably connected to the vane drive ring, and the electromagnetic driving component includes a base, a drive magnet, a drive lever, and a drive connector. the drive magnet is fixed to the base, the drive lever is rotatably fixed to the base, the drive coil is fixed to the drive lever and is installed facing the drive magnet, the drive lever is movably connected to the blade drive ring, the drive magnet drives the drive coil to rotate the drive lever when the drive coil is energized, and the drive lever drives the blade drive ring to rotate, thereby driving the light-shielding blades to shield or expose the lens of an imaging module.

[0007] In some embodiments, the drive magnet includes a first sub-magnet and a second sub-magnet, the first sub-magnet and the second sub-magnet are spaced apart to form an angle, the magnetic poles of the first sub-magnet and the second sub-magnet adjacent to the blade support ring have different polarities, and when current is applied to the drive coil, it receives forces in the same direction from the magnetic fields of the first sub-magnet and the second sub-magnet, thereby driving the drive lever to rotate.

[0008] In some embodiments, the drive lever includes a mounting portion and a drive arm fixedly connected to the mounting portion, the mounting portion is rotatably fixed to the base, the drive coil is fixed to the mounting portion, the drive arms are two, the two drive arms are spaced apart to form a drive groove, and the blade drive ring includes a drive ring portion and a drive shaft fixedly connected to the drive ring portion, the drive shaft slidably extending into the drive groove.

[0009] In some embodiments, the device further includes a position detection element, the position detection element being provided on the mounting portion, and the position detection element detects a relative position of the drive magnet to thereby detect a rotation angle of the blade drive ring.

[0010] In some embodiments, the sensor further includes a flexible substrate, the flexible substrate being fixed to the mounting portion and positioned between the mounting portion and the drive coil, the flexible substrate being electrically connected to the drive coil and the position detection element.

[0011] In some embodiments, the vane support ring includes a support ring portion and a side wall extending from the support ring portion toward the vane drive ring, the side wall extending circumferentially around the support ring portion and having an arcuate notch, the vane drive ring includes a drive ring portion and a drive shaft fixedly connected to the drive ring portion, the drive ring portion being accommodated within a space surrounded by the side wall and positioned opposite the support ring portion, and the drive shaft extending to the outer periphery of the side wall through the arcuate notch and being bent to extend toward the drive arm.

[0012] In some embodiments, the device further includes an arcuate positioning member that is disposed within the space enclosed by the side walls and is located on a side of the drive ring portion away from the support ring portion, and the arcuate positioning member is used to fix the drive ring portion in the axial direction of the drive ring portion.

[0013] In some embodiments, a positioning groove extending along a circumferential direction is provided on the inner wall surface of the side wall, and a portion of the arc-shaped positioning member is fitted into the positioning groove.

[0014] In some embodiments, the magnet further includes a closing yoke, the closing yoke being disposed on the mounting portion, and the closing yoke being used to form a closing magnetic field together with the driving magnet.

[0015] In some embodiments, the opposing side walls of the two drive arms are both configured as outwardly protruding arc side walls, and the drive shaft is cylindrical. Effect of the Invention

[0016] The variable aperture according to the present invention has a blade support ring and a blade drive ring that move to movably fix the light shielding blades, an electromagnetic drive component drives the drive lever to rotate relative to the base by the Lorentz force between the drive magnet and the drive coil, and the drive lever is slidably connected to the blade drive ring to rotate the blade drive ring, and the blade drive ring drives the light shielding blades to cover or expose the lens of the imaging module. This makes it possible to optimize the counterweight of the imaging module and reduce the burden on the autofocus mechanism by separating the aperture part and the electromagnetic drive component from the lens. At the same time, since the entire device is installed independently, the electrical wiring of the electromagnetic drive component can be provided around the lens and does not affect the focus operation of the lens. [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 perspective view showing the configuration of a variable diaphragm according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a front view of the variable diaphragm shown in FIG. [Diagram 3] FIG. 3 is a cross-sectional view of the variable diaphragm taken along the line AA′ in FIG. [Figure 4] FIG. 4 is an exploded view of the configuration of the variable diaphragm according to the first embodiment of the present invention. [Diagram 5] FIG. 5 is a front view of electromagnetic driving components of the variable diaphragm according to the first embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional view of the electromagnetic driving part taken along the line BB' in FIG. [Figure 7] FIG. 7 is a schematic diagram showing the combination of a drive arm and a drive shaft of the variable aperture according to the first embodiment of the present invention. [Figure 8] FIG. 8 is a schematic diagram showing how the drive coil of the variable aperture according to the first embodiment of the present invention rotates counterclockwise due to the Lorentz force. [Figure 9] FIG. 9 is a schematic diagram showing how the drive coil of the variable aperture according to the first embodiment of the present invention rotates clockwise due to the Lorentz force. [Figure 10] FIG. 10 is a front view of another electromagnetic driving part of the variable diaphragm according to the first embodiment of the present invention. [Figure 11] FIG. 11 is a cross-sectional view of the electromagnetic driving part taken along line CC' in FIG. [Figure 12] FIG. 12 is a perspective view showing the configuration of a blade support ring of the variable diaphragm according to the first embodiment of the present invention. [Figure 13] FIG. 13 is a schematic diagram of the variable diaphragm according to the first embodiment of the present invention when it is fully open. [Figure 14] FIG. 14 is a schematic diagram of the variable diaphragm according to the first embodiment of the present invention when it is completely closed. [Figure 15] FIG. 15 is a perspective view showing the configuration of a variable diaphragm according to a second embodiment of the present invention. [Figure 16] FIG. 16 is a front view of another electromagnetic driving part for the variable diaphragm according to the second embodiment of the present invention. [Figure 17] FIG. 17 is a cross-sectional view of the electromagnetic driving part taken along the line DD' in FIG. [Figure 18] FIG. 18 is a front view of a blade drive ring of a variable aperture according to a third embodiment of the present invention. [Figure 19] FIG. 19 is a rear view of a blade support ring of a variable aperture according to a third embodiment of the present invention. [Figure 20] FIG. 20 is a schematic diagram showing the light-shielding blades of the variable diaphragm according to the third embodiment of the present invention when they are fully open. [Figure 21] FIG. 21 is a schematic diagram of the light blocking blades of the variable diaphragm according to the first embodiment of the present invention when they are completely closed. [Figure 22] FIG. 22 is a schematic diagram showing the light-shielding blades of the variable diaphragm according to the third embodiment of the present invention when they are fully open. [Diagram 23] FIG. 23 is a schematic diagram of the light-shielding blades of the variable diaphragm according to the first embodiment of the present invention when they are completely closed. [Figure 24] FIG. 24 is a rear view of a blade support ring of a variable aperture according to a fourth embodiment of the present invention. [Diagram 25] FIG. 25 is a perspective view showing a configuration of an imaging module according to a fifth embodiment of the present invention. [Figure 26] FIG. 26 is a front view of the imaging module shown in FIG. [Figure 27] FIG. 27 is a perspective view showing the configuration of another imaging module according to the fifth embodiment of the present invention. [Figure 28] FIG. 28 is a perspective view showing the configuration of an electronic device according to a sixth embodiment of the present invention. [Explanation of symbols]

[0018] 100 Variable Aperture 101 Shading blade 1011 Positioning part 1012 Sliding part 1013 Light shielding part 1013a Circular hole 1014 Connecting shaft 102 Blade support ring 1021 Support ring part 1021a Positioning hole 1022 Side wall 1022a Positioning groove 1023 Circular notch 1024 Support leg 103 Blade drive ring 1031 Drive ring part 1031a Shoot 1031b Ring-shaped protrusion 1032 Drive shaft 104 Electromagnetic drive parts 1041 Base 1041a Tilt arm 1042 Drive magnet 1042a 1st sub magnet 1042b Second sub magnet 1043 Drive lever 1043a Mounting part 1043b Drive arm 1043c Drive groove 1044 Drive coil 1045 Pivot shaft 105 Closure Yoke 106 Position detection element 107 Flexible PCB 1071 Fixed part 1072 Connection 108 Arc-shaped positioning member 200 Imaging module 201 Lens 2011 Lens Assembly 2012 Lens Case 202 Autofocus mechanism 2021 Cases 300 Electronic equipment 301 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] In this application, the terms "near end" and "far end" are relative position concepts. In general, the end closer to the patient is the far end, and the end closer to the operator is the near end. In the case of a delivery device, the end closer to the target position during use is the far end, and the end closer to the operating end is the near end. In addition, "parallel" and "perpendicular" cannot be understood in the narrow sense as 0° or 90°, but should be understood to include a reasonable angle range with a certain float from 0° or 90° on the premise of achieving a technical effect.

[0025] As shown in FIGS. 1 to 4, the first embodiment of the present invention relates to an adjustable aperture 100. The adjustable aperture 100 includes a light-shielding blade 101, a blade support ring 102, a blade drive ring 103, and an electromagnetic drive part 104. The light-shielding blade 101 is rotatably fixed to the blade support ring 102. The blade drive ring 103 is coaxial with the blade support ring 102 and is fixed to the object side of the blade support ring 102. The blade drive ring 103 is rotatable with respect to the blade support ring 102. The light-shielding blade 101 is slidably connected to the blade drive ring 103. The electromagnetic drive part 104 includes a base 1041, a drive magnet 1042, a drive lever 1043, and a drive coil 104. 4, in which the driving magnet 1042 is fixed to the base 1041, the driving lever 1043 is rotatably fixed to the base 1041, the driving coil 1044 is fixed to the driving lever 1043 and is installed facing the driving magnet 1042, the driving lever 1043 is movably connected to the blade driving ring 103, and when the driving coil 1044 is energized, the driving magnet 1042 drives the driving coil 1044 to rotate the driving lever 1043, and the driving lever 1043 drives the blade driving ring 103 to rotate, thereby driving the light-shielding blade 101 to shield or expose the lens of an imaging module.

[0026] In the variable diaphragm 100 according to the present invention, the blade support ring 102 and the blade drive ring 103 are actuated to movably fix the light shielding blade 101, the electromagnetic drive part 104 drives the drive lever 1043 to rotate relative to the base 1041 by the Lorentz force between the drive magnet 1042 and the drive coil 1044, the drive lever 1043 is slidably connected to the blade drive ring 103 to rotate the blade drive ring 103, and the blade drive ring 103 drives to rotate the light shielding blade 101 to shield or expose the lens of the imaging module. In this way, the diaphragm part and the electromagnetic drive part 104 are independent of the lens, so that the counterweight of the imaging module can be optimized and the burden on the autofocus mechanism can be reduced. At the same time, since the entire device is installed independently, the electrical wiring of the electromagnetic drive part 104 can be provided around the lens and does not affect the focus operation of the lens.

[0027] It should be noted that the light shielding blades 101 do not completely shield the lens, i.e., when the light shielding blades 101 shield the lens to a maximum shielding area, a certain area of ​​the lens can still be exposed. It can be understood that, if necessary, the light shielding blades 101 may completely shield the lens when the light shielding blades 101 shield the lens to a maximum shielding area.

[0028] As shown in Figures 4 and 5, in this embodiment, the driving lever 1043 includes a mounting portion 1043a and a driving arm 1043b fixedly connected to the mounting portion 1043a, the mounting portion 1043a is rotatably fixed to the base 1041, the driving coil 1044 is fixed to the mounting portion 1043a, there are two driving arms 1043b, the two driving arms 1043b are installed at a distance from each other to form a driving groove 1043c, and the blade driving ring 103 includes a driving ring portion 1031 and a driving shaft 1032 fixedly connected to the driving ring portion 1031, and the driving shaft 1032 extends slidably into the driving groove 1043c.

[0029] 3 and 4, specifically, the driving lever 1043 is rotatably connected to the base 1041 by a pivot shaft connection manner, for example, the driving lever 1043 is inserted and fixed to the base 1041 using a pivot shaft 1045, and the mounting portion 1043a is rotatably fitted to the outer periphery of the pivot shaft 1045. Alternatively, the pivot shaft 1045 is rotatably inserted into the base 1041, and the pivot shaft 1045 and the mounting portion 1043a are fixedly connected. Alternatively, the pivot shaft 1045 can rotate simultaneously with respect to the base 1041 and the mounting portion 1043a.

[0030] When a current is applied to the drive coil 1044, the drive coil 1044 moves under the influence of the Lorentz force in the magnetic field of the drive magnet 1042. Since the drive coil 1044 is fixed to the mounting portion 1043a and the mounting portion 1043a is restricted by the pivot shaft 1045, the mounting portion 1043a rotates with respect to the base 1041, and thus drives the two drive arms 1043b to rotate about the axis of the pivot shaft 1045 as a rotation axis. The drive shaft 1032 of the blade drive ring 103 slidably extends into a drive groove 1043c calibrated by the two drive arms 1043b, and when the two drive arms 1043b rotate, the drive shaft 1032 drives the drive ring portion 1031 to rotate around the axis of the drive ring portion 1031 as the rotation axis, and when the drive ring portion 1031 rotates, it moves the light-shielding blade 101 to shield or expose the lens of the imaging module.

[0031] As shown in Figs. 5 to 7, the opposing side walls of the two drive arms 1043b are both installed as arc side walls protruding outward, and the drive shaft 1032 is cylindrical. In an actual application scene, the lens of the image pickup module may be tilted due to a problem with the counterweight of the image pickup module or the influence of vibration, and the blade drive ring 103 may also be tilted due to the tilt of the lens, and finally the drive shaft 1032 may be tilted with respect to the two drive arms 1043b. If the opposing side walls of the two drive arms 1043b are flat or concave, the drive shaft 1032 may get caught and transmission between the drive arms 1043b and the drive shaft 1032 may not be possible. When the opposing side walls of the two driving arms 1043b are installed as arc-shaped side walls protruding outward or as side walls with part of a cylinder, when the driving shaft 1032 is tilted, a certain escape space can be provided in the two upper and lower parts of the arc-shaped side walls, which avoids the driving shaft 1032 and prevents it from getting caught, thereby achieving smooth transmission.

[0032] Furthermore, the surface precision of the two arcuate side walls can be set to be sufficiently smooth according to actual needs so that the driving shaft 1032 can move smoothly in the driving groove 1043c.

[0033] In some embodiments, the mounting portion 1043a and the two drive arms 1043b are integrally provided, which reduces the number of parts of the variable diaphragm 100, lowers the difficulty of assembly, and increases production efficiency.

[0034] As shown in Figures 2, 4, 5, 8 and 9, in this embodiment, the driving magnet 1042 includes a first sub-magnet 1042a and a second sub-magnet 1042b, and the first sub-magnet 1042a and the second sub-magnet 1042b are installed at a distance from each other so as to form an angle between them. The magnetic poles of the first sub-magnet 1042a and the second sub-magnet 1042b adjacent to the blade support ring 102 have different polarities. When current is applied, the driving coil 1044 receives forces in the same direction from the magnetic fields of the first sub-magnet 1042a and the second sub-magnet 1042b, thereby driving the driving lever 1043 to rotate.

[0035] For example, as shown in Figures 4, 8 and 9, the base 1041 has an overall "W" shape, the pivot axis 1045 is located in the center of the base 1041, the first sub-magnet 1042a and the second sub-magnet 1042b are located on opposite sides of the center of the base 1041 and fixed together with tilt arms 1041a at both ends of the base 1041, and the axes of the first sub-magnet 1042a and the second sub-magnet 1042b are arranged to form an angle therebetween, which may be 0° to 180° (excluding 0° and 180°), for example, 120° or other angles. Here, the N pole of the first sub-magnet 1042a is close to the blade support ring 102 and the S pole is away from the blade support ring 102, and the S pole of the second sub-magnet 1042b is close to the blade support ring 102 and the N pole is away from the blade support ring 102. When a clockwise current flows through the drive coil 1044 (as shown by the dashed arrow in FIG. 8), according to the left-hand rule, the drive coil 1044 receives a downward Lorentz force in the magnetic field of the first sub-magnet 1042a, and the drive coil 1044 receives an upward Lorentz force in the magnetic field of the second sub-magnet 1042b. Because the driving coil 1044 is fixed to the mounting portion 1043a, the pivot shaft 1045 controls the driving coil 1044 to drive the mounting portion 1043a and the driving arm 1043b to rotate counterclockwise (as shown by the curved arrow in Figure 8), and the driving arm 1043b drives the blade drive ring 103 to rotate clockwise, causing the light-shielding blade 101 to shade the lens of the imaging module. Conversely, when a counterclockwise current flows through the drive coil 1044 (as shown by the dashed arrow in Figure 9), the direction of the force received by the drive coil 1044 is reversed, thereby causing the mounting portion 1043a and the drive arm 1043b to rotate clockwise (as shown by the curved arrow in Figure 9), and the drive arm 1043b drives the blade drive ring 103 to rotate counterclockwise, thereby causing the light-shielding blade 101 to expose the lens of the imaging module.

[0036] In this embodiment, the driving lever 1043 is generally plate-shaped, and its thickness direction is parallel to the axial direction of the driving ring portion 1031. In this case, the rotation plane of the mounting portion 1043a and the two driving arms 1043b is perpendicular to the axis of the driving ring portion 1031, that is, the plane on which the rotation directions of the mounting portion 1043a and the two driving arms 1043b are located is perpendicular to the axis of the driving ring portion 1031. As can be seen, the first sub-magnet 1042a and the second sub-magnet 1042b are both rectangular parallelepiped-shaped, and the plane on which the magnetic poles of both are located is perpendicular to the thickness direction of the driving lever 1043. This is a setting based on the characteristics of the Lorentz force.

[0037] As is understood, the blade drive ring 103 rotates clockwise to drive the light shielding blade 101 to block the camera, and the blade drive ring 103 rotates counterclockwise to drive the light shielding blade 101 to expose the camera, which is only one possible method. Conversely, by appropriate settings, the blade drive ring 103 may be rotated clockwise to drive the light shielding blade 101 to expose the camera, and the blade drive ring 103 may be rotated counterclockwise to drive the light shielding blade 101 to block the camera. At the same time, the number of the first sub-magnet 1042a and the second sub-magnet 1042b is not limited to a specific number, and it is sufficient that the drive coil 1044 can be driven to rotate the mounting parts 1043a and 1043b under the influence of the Lorentz force when the drive coil 1044 is energized, by appropriate settings.

[0038] As shown in Figures 5 and 6, in this embodiment, the variable aperture 100 further includes a closing yoke 105, which is provided on the mounting portion 1043a, and which is used to form a closing magnetic field together with the driving magnet 1042.

[0039] Specifically, the closing yoke 105 can be provided on the side of the mounting portion 1043a away from the driving coil 1044, and the closing yoke 105 and the first sub-magnet 1042a and the second sub-magnet 1042b form a closed magnetic field, preventing magnetic leakage and increasing the driving efficiency of the first sub-magnet 1042a and the second sub-magnet 1042b relative to the driving coil 1044 when current is applied to the driving coil 1044. Furthermore, when the driving coil 1044 is not energized, the closing yoke 105 continues to apply a magnetic attraction force to the driving coil 1044, thereby relatively stabilizing the position of the driving coil 1044 and thereby maintaining a stable amount of light entering the variable aperture 100. Even if the size of the light entrance of the variable aperture 100 changes due to the influence of unexpected vibrations, the closing yoke 105 attracts the driving coil 1044 to move the driving arm 1043b, and further rotates the driving ring portion 1031 using the driving arm 1043b to restore the size of the light entrance to its original state. In other words, the closing yoke 105 acts like a spring and eliminates the effect of vibrations on the variable aperture 100. In the process of driving the driving ring portion 1031, the closing yoke 105 also utilizes this magnetic attraction effect to eliminate vibration or shaking during transmission and increase stability.

[0040] 10 and 11, in another possible embodiment, the installation positions of the driving magnet 1042 and the driving coil 1044 can be interchanged, i.e., the driving magnet 1042 can be installed on the mounting part 1043a, and the driving coil 1044 can be installed on the base 1041, in which case the closing yoke 105 can be omitted. The motion of such an installation manner is still realized by the driving of Lorentz force. The installation of other parts is almost the same, so a detailed description is omitted here.

[0041] As shown in Figures 4 to 6, in some embodiments, the variable aperture 100 further includes a position detection element 106, which is provided on an attachment portion 1043a, and which detects the relative position of the drive magnet 1042 to detect the rotation angle of the blade drive ring 103.

[0042] Specifically, the position detection element 106 is provided on the side of the mounting part 1043a facing the driving magnet 1042, and may be installed close to the driving coil 1044, for example. When the mounting part 1043a rotates, the position detection element 106 changes with respect to both the first sub magnet 1042a and the second sub magnet 1042b, and the magnetic field strength, magnetic induction strength, magnetic field direction, and magnetic flux of the first sub magnet 1042a and the second sub magnet 1042b detected by the position detection element 106 are different at different positions, and the position detection element 106 detects these changes to identify the rotation angle of the mounting part 1043a. Note that a correspondence relationship between the rotation angle of the mounting part 1043a and the rotation angle of the driving ring part 1031 may be set in advance according to actual needs. The correspondence relationship between the rotation angles of such different parts is clearly known to those skilled in the art, so there is no need to repeat it here.

[0043] Alternatively, the position sensing element 106 may be a Hall element.

[0044] As shown in Fig. 4 and Fig. 5, in this embodiment, the variable diaphragm 100 further includes a flexible substrate 107, which is fixed to the mounting portion 1043a and located between the mounting portion 1043a and the driving coil 1044, and the flexible substrate 107 is electrically connected to the driving coil 1044 and the position detection element 106. Here, the flexible substrate 107 includes a fixed portion 1071 fixed to the mounting portion 1043a and a bent portion 1072 that bends and extends, and the fixed portion 1071 and the bent portion 1072 may be provided separately and electrically connected, or may be provided integrally. The fixed portion 1071 can be fixed to the mounting portion 1043a by a screw, a rivet, or the like, and then the driving coil 1044 and the position detection element 106 are provided on the side of the fixed portion 1071 away from the mounting portion 1043a. The fixed portion 1071 is electrically connected to the drive coil 1044 and the position detection element 106, and is also electrically connected to a power source (not shown) and a control chip (not shown) via the bent portion 1072. Position information detected by the position detection element 106 is transmitted to the control chip via the flexible substrate 107. The control chip issues a control command based on the received position information and adjusts the direction and / or magnitude of the current supplied to the drive coil 1044, thereby adjusting the rotation direction and / or rotation angle of the drive ring portion 1031, and ultimately adjusting the size of the light entrance of the variable aperture 100.

[0045] Furthermore, during the rotation of the mounting portion 1043a, the flexible substrate 107 exerts a certain reaction force on the mounting portion 1043a. In order to reduce this effect, the bent portion 1072 may be bent multiple times, for example, two or more times.

[0046] As shown in Figures 1, 4 and 12, in this embodiment, the blade support ring 102 includes a support ring portion 1021 and a side wall 1022 extending from the support ring portion 1021 toward the blade drive ring 103, the side wall 1022 extends along the circumferential direction of the support ring portion 1021, and the side wall 1022 has an arc-shaped notch 1023, the drive ring portion 1031 is accommodated in the space surrounded by the side wall 1022 and is installed opposite the support ring portion 1021, and the drive shaft 1032 extends to the outer periphery of the side wall 1022 through the arc-shaped notch 1023 and is bent to extend toward the drive arm 1043b.

[0047] Specifically, when the driving shaft 1032 rotates to a certain position, the driving shaft 1032 is blocked by the end portion located in the arc-shaped notch 1023 of the side wall 1022 and cannot continue to rotate, so that the angle corresponding to the arc length of the arc-shaped notch 1023 can be regarded as the rotation angle range of the support ring portion 1021. A space surrounded by the support ring portion 1021, the side wall 1022 and the driving ring portion 1031 constitutes a blade chamber for accommodating the light-shielding blade 101, and the light-shielding blade 101 moves within the blade chamber to change the size of the light entrance of the variable diaphragm 100.

[0048] 12 to 14, more specifically, a positioning hole 1021a is provided in the support ring portion 1021, a chute 1031a extending along the radial direction of the drive ring portion 1031 is provided in the drive ring portion 1031, and a positioning portion 1011 is provided on the image side of the light-shielding blade 101, and the positioning portion 1011 extends rotatably into the positioning hole 1021a relative to the support ring portion 1021. A sliding portion 1012 is provided on the object side of the light-shielding blade 101, and the sliding portion 1012 extends slidably into the chute 1031a relative to the drive ring portion 1031. When the drive ring portion 1031 rotates, the sliding portion 1012 slides within the chute 1031a, and the light-shielding blade 101 is regulated by the positioning portion 1011 and is therefore capable of rotating around the axis of the positioning portion 1011 as the rotation axis, thereby shielding or exposing the lens.

[0049] As shown in Figure 3, the driving ring portion 1031 needs to rotate relative to the support ring portion 1021 in the process of driving the light-shielding blade 101, and in order to reduce the frictional resistance of the support ring portion 1021 against the driving ring portion 1031, an annular protrusion 1031b extending along the circumferential direction of the driving ring portion 1031 may be provided on the side of the driving ring portion 1031 facing the support ring portion 1021, and the cross-sectional shape of the annular protrusion 1031b in the radial direction of the driving ring portion 1031 may be semicircular, or may be a hemispherical protrusion installed at intervals along the circumferential direction of the driving ring portion 1031, or a plurality of grooves (not shown) may be provided in the circumferential direction of the driving ring portion 1031, and balls (not shown) may be provided in the grooves.

[0050] However, the number of the light-shielding blades 101 in this embodiment may be multiple, for example, three or more, more specifically, five, and the light-shielding blades may be in the form of an arc sheet, with the positioning portion 1011 provided at one end and the sliding portion 1012 provided at the other end. The light-shielding blades 101 are installed at intervals along the circumferential direction of the support ring portion 1021, and any adjacent light-shielding blades 101 are installed so as to overlap each other. For example, one end of one light-shielding blade 101, which is provided with the positioning portion 1011, is located on the image side of the light-shielding blade 101 adjacent to this end, and one end, which is provided with the sliding portion 1012, is located on the object side of the light-shielding blade adjacent to this end. The other light-shielding blades 101 are similar. Correspondingly, a plurality of positioning holes 1021a are provided at intervals along the circumferential direction in the support ring portion 1021, and a plurality of chutes 1031a are provided at intervals along the circumferential direction in the drive ring portion 1031.

[0051] The light blocking vanes 101 are formed to surround the light entrance of the variable diaphragm 100, and as can be understood, the more the number of the light blocking vanes 101, the closer the surrounded light entrance becomes to a circle, and the more accurate and fine the adjustment effect becomes. However, the more the number of the light blocking vanes 101, the greater the weight, volume, and difficulty of assembly become, so the number of the light blocking vanes 101 is generally 3 to 6, and may be more if there is other demand.

[0052] In this embodiment, the arc length of the light-shielding vanes 101 is set to 30% to 60% of the circumference of the corresponding circle, thereby preventing the light-shielding vanes 101 from being too heavy, ensuring the sensitivity of the variable aperture 100, and preventing the light-shielding vanes 101 from interfering with each other during movement.

[0053] Furthermore, the area of ​​the light entrance surrounded by the light-shielding vanes 101 may be 30% to 60% of the area of ​​the corresponding circle of the light-shielding vanes 101.

[0054] In this embodiment, a plurality of support legs 1024 are provided at intervals along the circumferential direction on the support ring portion 1021, and the plurality of support legs 1024 are located on the outer edge of the support ring portion 1021 or on the side away from the drive ring portion 1031, and extend in a direction away from the drive ring portion 1031. When the variable diaphragm 100 is mounted on the imaging module, the plurality of support legs 1024 abut against the lens, thereby maintaining a constant distance between the support ring portion 1021 and the lens, and preventing the support ring portion 1021 from interfering with the focusing operation of the lens.

[0055] 1 to 4 and 12, in this embodiment, the variable diaphragm 100 further includes an arc-shaped positioning member 108, which is provided in the space surrounded by the side wall 1022 and located on the side of the driving ring portion 1031 away from the support ring portion 1021, and which is used to fix the driving ring portion 1031 in the axial direction of the driving ring portion 1031. Thus, by fixing the driving ring portion 1031 in the axial direction by the arc-shaped positioning member 108, the driving ring portion 1031 is prevented from coming off the space surrounded by the side wall 1022.

[0056] Furthermore, a positioning groove 1022a extending in the circumferential direction is provided on the inner wall surface of the side wall 1022, and a portion of the arc-shaped positioning member 108 is fitted into the positioning groove 1022a. By fitting a portion of the arc-shaped positioning member 108 into the positioning groove 1022a and positioning the arc-shaped positioning member 108 with the positioning groove 1022a, the arc-shaped positioning member 108 can continuously and stably hold the position of the driving ring portion 1031.

[0057] As can be understood, since the drive shaft 1032 needs to move within the arcuate notch 1023, the arcuate positioning member 108 is not perfectly circular, but is set in a C-shape, the opening of which corresponds to the arcuate notch 1023, and may be slightly longer or shorter than the arc length of the arcuate notch 1023.

[0058] Optionally, the arc-shaped positioning member 108 may be made of metal, polymer, or other materials, as long as the arc-shaped positioning member 108 does not affect the rotation of the driving ring portion 1031, and preferably, the arc-shaped positioning member 108 is made of plastic, because plastic has appropriate hardness and toughness, is not easily broken, has low density, is lightweight, and has a smooth surface.

[0059] The second embodiment of the present invention provides a variable throttle 100. The variable throttle 100 in this embodiment is almost the same as the variable throttle 100 in the first embodiment, with the main difference being that the rotation planes of the two drive arms 1043b are parallel to the axis of the drive ring portion 1031.

[0060] As shown in Figures 15 to 17, in this embodiment, the thickness direction of the plate-shaped driving lever 1043 is perpendicular to the axial direction of the driving ring portion 1031, and as can be understood, based on the characteristics of the Lorentz force, the base, the first sub-magnet 1042a, the second sub-magnet 1042b, and the driving coil 1044 are also adaptively adjusted according to the installation of the driving lever 1043.

[0061] Furthermore, the drive shaft 1032 may be provided directly on the side of the drive ring portion 1031 facing the base 1041 and extend along the axial direction of the drive ring portion 1031, and the two drive arms 1043b are located on opposite sides of the drive shaft 1032, and the drive shaft 1032 may be set to a cylindrical shape or may be a hemispherical protrusion, or may be a combination of both.

[0062] Furthermore, the drive shaft 1032 may be installed in multiple numbers, and the multiple drive shafts 1032 are installed at intervals along the circumferential direction of the drive ring portion 1031, in which case the operation of the two drive arms 1043b and the multiple drive shafts 1032 is similar to two gears whose axial directions are perpendicular to each other.

[0063] The third embodiment of the present invention provides a variable aperture 100. The variable aperture 100 in this embodiment is almost the same as the variable aperture 100 in the first embodiment, and the main difference is that the number of the light blocking blades 101 is reduced.

[0064] As shown in Figures 18 and 19, specifically, there are two light-shielding blades 101, and they are installed symmetrically on the support ring portion 1021 by rotating around the axis of the drive ring portion 1031 as the rotation axis. Correspondingly, two positioning holes 1021a are provided in the support ring portion 1021, and two chutes 1031a are also provided in the drive ring portion 1031.

[0065] In this embodiment, the extending direction of the chute 1031a in the first embodiment is adjusted, specifically, the chute 1031a extends from a position close to the outer edge of the driving ring portion 1031 toward the inner edge of the driving ring portion 1031, and the extending direction of the chute 1031a and the radial direction of the driving ring portion 1031 form an angle, and the specific size of the angle may be adaptively adjusted according to the specific shape, dimensions and opening demand of the light-shielding blade 101. Here, detailed explanation is omitted.

[0066] 20 and 21, the light-shielding vanes 101 are substantially "J" shaped, with arc segment edges at their bent portions, and when the drive ring portion 1031 of the lens drives the two light-shielding vanes 101 to approach each other to their limit positions, the edges of the arc segments of the two light-shielding vanes 101 form a circle. Here, the "limit position" refers to a corresponding position when the blocking area of ​​the two light-shielding vanes 101 with respect to the lens is maximized when the variable aperture 100 is mounted on the imaging module.

[0067] In this embodiment, the number of parts of the variable throttle 100 is reduced compared to the first embodiment, so that the amount of work required to assemble the variable throttle 100 can be reduced and production efficiency can be improved.

[0068] The fourth embodiment of the present invention provides a variable aperture 100. The variable aperture 100 in this embodiment is almost the same as the variable aperture 100 in the third embodiment, and the main difference is that the number of the light blocking blades 101 is further reduced.

[0069] As shown in Figs. 22 to 24, in this embodiment, the number of the light-shielding blade 101 is only one. In this case, the light-shielding blade 101 may include a light-shielding portion 1013 for blocking light and a connection shaft 1014 connected to the light-shielding portion 1013, and may have a sector-like structure having a through hole. The positioning portion 1011 is provided at one end of the connection shaft 1014 far from the light-shielding portion 1013 and is located on the image side of the connection shaft 1014, and the sliding portion 1012 is provided in the middle of the connection shaft 1014 and is located on the image side of the connection shaft 1014.

[0070] As can be understood, as shown in Figure 23, in this embodiment, the chute 1031a is provided on the support ring portion 1021, the sliding portion 1012 passes through the chute 1031a, and the support ring portion 1021 can be adaptively adjusted to an irregular shape, and the inner edge of the support ring portion 1021 can be set to a contour shape that matches the edge of the shading blade 101, thereby limiting the movement range of the shading blade 101 and also playing a role in supporting the shading blade 101.

[0071] In this embodiment, the sliding portion 1012 can be directly driven by the driving arm 1043b, and the sliding portion 1012 drives the light blocking portion 1013 to rotate around the axis of the positioning portion 1011 as a rotation axis. This means that the driving shaft 1032 does not need to be provided on the driving ring portion 1031. In this case, the driving ring portion 1031 mainly performs a fixing function for the light blocking blade 101 in the axial direction, that is, prevents the light blocking blade 101 from coming off the support ring portion 1021 in the axial direction of the support ring portion 1021.

[0072] Furthermore, the light shielding part 1013 may be set to be annular, i.e., the light shielding part 1013 has a circular hole 1013a, and when the light shielding blade 101 moves to reach the maximum shielding area for the lens, the circular hole 1013a and the lens are approximately coaxial. Alternatively, the light shielding part 1013 may have a plurality of circular holes 1013a, and the specific size and installation position may be adjusted according to actual needs. This embodiment is not particularly limited thereto.

[0073] In this embodiment, compared to the third embodiment, the number of parts of the variable throttle 100 is further reduced, the structure of the blade drive ring 103 is simplified, the amount of work required to assemble the variable throttle 100 is reduced, and production efficiency is improved.

[0074] A fifth embodiment of the present invention provides an imaging module 200 including a lens 201, an autofocus mechanism 202, and the variable aperture 100 according to any one of the above-described embodiments, the autofocus mechanism 202 including a case 2021 that houses the lens 201, the variable aperture 100 being fixed to the case 2021, and a blade support ring 102 of the variable aperture 100 being located on the object side of the lens 201. Here, an optical axis LA of the imaging module 200 overlaps with an axis of the support ring portion 1021 and an axis of the drive ring portion 1031. Here, Figs. 25 and 26 are schematic diagrams of the imaging module including the variable aperture 100 according to the first embodiment, and Fig. 27 is a schematic diagram of the imaging module 200 including the variable aperture 100 according to the second embodiment.

[0075] Specifically, the lens 201 includes a lens assembly 2011 and a lens case 2012 , the lens assembly 2011 is housed in the lens case 2012 , and the plurality of support legs 1024 abut against the lens case 2012 .

[0076] In this embodiment, the imaging module may be provided with an image stabilization mechanism (not shown) installed on the image side of the case 2021, and the image stabilization mechanism can achieve image stabilization by driving a sensor (not shown) of the imaging module.

[0077] The sixth embodiment of the present invention provides an electronic device 300 including a device body 301 and the imaging module 200 in the fifth embodiment, in which the imaging module 200 is provided in the device body 301, as shown in FIG.

[0078] 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.

[0079] The above is a detailed description of the variable aperture, imaging module, and electronic device according to the embodiment of the present invention. 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. A variable aperture applied to an imaging module, The light shielding blade includes a blade support ring, a blade drive ring, and an electromagnetic drive component. The light blocking vane is rotatably fixed to the vane support ring, the vane drive ring is coaxial with the vane support ring and fixed to an object side of the vane support ring, the vane drive ring is rotatable relative to the vane support ring, and the light blocking vanes are slidably connected to the vane drive ring; The electromagnetic driving part includes a base, a driving magnet, a driving lever, and a driving coil, the driving magnet is fixed to the base, the driving lever is rotatably fixed to the base, the driving coil is fixed to the driving lever and is disposed opposite to the driving magnet, and the driving lever is movably connected to the blade driving ring; When the drive coil is energized, the drive magnet drives the drive coil to rotate the drive lever, and the drive lever drives the blade drive ring to rotate, thereby driving the light-shielding blade to shield or expose a lens of an imaging module. A variable aperture characterized by:

2. the drive magnet includes a first sub-magnet and a second sub-magnet, the first sub-magnet and the second sub-magnet are installed at an angle to each other, the polarities of the magnetic poles of the first sub-magnet and the second sub-magnet adjacent to the blade support ring are different, and the drive coil receives forces in the same direction from the magnetic fields of the first sub-magnet and the second sub-magnet when current is applied, thereby driving the drive lever to rotate.

2. The variable aperture according to claim 1.

3. The driving lever includes a mounting portion and a driving arm fixedly connected to the mounting portion, the mounting portion is rotatably fixed to the base, the driving coil is fixed to the mounting portion, there are two driving arms, and the two driving arms are spaced apart to form a driving groove; the vane drive ring includes a drive ring portion and a drive shaft fixedly connected to the drive ring portion, the drive shaft slidably extending into the drive groove; 2. The variable aperture according to claim 1.

4. a position detection element provided on the mounting portion, the position detection element detecting a rotation angle of the blade drive ring by detecting a relative position of the drive magnet; 4. The variable aperture according to claim 3.

5. The flexible substrate is fixed to the mounting portion and is located between the mounting portion and the drive coil, and the flexible substrate is electrically connected to the drive coil and the position detection element.

5. A variable aperture according to claim 4.

6. The blade support ring includes a support ring portion and a side wall extending from the support ring portion toward the blade drive ring, the side wall extending along a circumferential direction of the support ring portion, and the side wall is provided with an arc-shaped notch; The blade drive ring includes a drive ring portion and a drive shaft fixedly connected to the drive ring portion, the drive ring portion is accommodated in a space surrounded by the side wall and is disposed opposite to the support ring portion, and the drive shaft extends to the outer periphery of the side wall through the arc-shaped notch and is bent to extend toward the drive arm.

4. The variable aperture according to claim 3.

7. The present invention further includes an arc-shaped positioning member, the arc-shaped positioning member being provided in the space surrounded by the side wall and located on a side of the driving ring portion away from the support ring portion, the arc-shaped positioning member being used to fix the driving ring portion in the axial direction of the driving ring portion.

7. A variable aperture according to claim 6.

8. A positioning groove is provided on an inner wall surface of the side wall, the positioning groove extending in a circumferential direction, and a portion of the arc-shaped positioning member is fitted into the positioning groove.

8. A variable aperture as claimed in claim 7.

9. The magnetic actuator further includes a closing yoke, the closing yoke being provided on the mounting portion, and the closing yoke is used to form a closing magnetic field together with the driving magnet.

4. The variable aperture according to claim 3.

10. The opposing side walls of the two drive arms are both provided as arcuate side walls protruding outward, and the drive shaft is cylindrical.

4. The variable aperture according to claim 3.

11. A lens, an autofocus mechanism, and the variable diaphragm according to any one of claims 1 to 10, wherein the autofocus mechanism includes a case that houses the lens, the variable diaphragm is fixed to the case, and a blade support ring of the variable diaphragm is located on the object side of the lens. An imaging module comprising:

12. A device body and the imaging module according to claim 11, wherein the imaging module is provided in the device body.

1. An electronic device comprising:

Images