Adjustable diaphragm, camera module and electronic device

Abstract

An adjustable diaphragm (100). A blade support ring (102) cooperates with a blade drive ring (103) to movably fix light shading blades (101). By means of Lorentz force between a drive magnetic steel (1042) and a drive coil (1044), an electromagnetic drive component (104) drives a drive rod (1043) to rotate relative to a base (1041). The drive rod (1043) is slidably connected to the blade drive ring (103) so as to drive the blade drive ring (103) to rotate, such that the blade drive ring (103) drives the light shading blades (101) to rotate so as to shield or expose a lens (201) of a camera module (200). In this way, making a diaphragm part and the electromagnetic drive component (104) independent of the lens (201) can optimize the weight distribution of the camera module (200), so as to reduce the burden of an autofocus mechanism (202). Additionally, because of the overall independent arrangement, electrical wiring of the electromagnetic drive component (104) can be arranged around the periphery of the lens (201), and thus does not affect the focusing movement of the lens (201).

Description

Adjustable aperture, camera module and electronic equipment

[0001] This application refers to Japanese patent application No. 2023-151828, filed on September 20, 2023, entitled “Adjustable aperture, camera module and electronic device”, which is incorporated into this application in its entirety by reference. Technical Field

[0002] The embodiments of the present application relate to the technical field of camera devices, and in particular to an adjustable aperture, a camera module, and an electronic device. Background Art

[0003] The aperture (adjustable iris) is used to change the amount of light entering an optical system for imaging. Setting an aperture in a camera module allows the module to adjust its size to suit different light and dark scenes. The focus mechanism adjusts the camera module's focus by changing the position of the lens, enabling a clearer image of the target. The combination of the aperture and focus mechanism can improve the camera module's shooting performance. Consequently, camera modules with both mechanisms are popular with consumers in electronic devices such as smartphones and tablets. Technical issues

[0004] The blade drive mechanism drives multiple blades to move, so that the size of the opening surrounded by these blades can be changed, which can be applied to different optical units on cameras such as shutters, apertures or filters. The existing adjustable iris, that is, the corresponding drive mechanism, is set on the lens and is located on the object side of the lens. This will increase the object side counterweight of the lens, easily causing the lens to tilt and affecting the focus drive of the lens. If a leaf spring is used, the hardness of the leaf spring needs to be increased to support the lens with an adjustable iris. Even if a leaf spring is not used, the focusing mechanism needs to provide the same large holding force. In addition, internal electrical wiring is required to drive the adjustable iris, and it must be ensured that the electrical wiring does not affect the focus, which makes the design of the overall solution more difficult.

[0005] Therefore, there is an urgent need for an adjustable iris in this field to solve the above technical problems. Technical Solutions

[0006] An embodiment of the present application provides an adjustable aperture, including a light-shielding blade; a blade supporting ring, the light-shielding blade is rotatably fixed to the blade supporting ring; a blade driving ring, coaxial with the blade supporting ring and fixed to the object side of the blade supporting ring, the blade driving ring is rotatable relative to the blade supporting ring; the light-shielding blade is slidably connected to the blade driving ring; an electromagnetic driving assembly, including a base, a driving magnet, a driving rod, and a driving coil, the driving magnet is fixed to the base, the driving rod is rotatably fixed to the base, the driving coil is fixed to the driving rod and is arranged opposite to the driving magnet; the driving rod is movably connected to the blade driving ring; the driving magnet drives the driving coil to drive the driving rod to rotate when the driving coil is energized, and the driving rod drives the blade driving ring to rotate and drive the light-shielding blade to block or expose the lens of the camera module.

[0007] An embodiment of the present application provides a camera module, including a lens, an autofocus mechanism and the above-mentioned adjustable iris, wherein the autofocus mechanism includes a housing for accommodating the lens, the adjustable iris is fixed to the housing, and the blade support ring of the adjustable iris is located on the object side of the lens.

[0008] An embodiment of the present application further provides an electronic device, comprising a device body and the above-mentioned camera module, wherein the camera module is arranged on the device body. Beneficial effects

[0009] The beneficial effects of the present application are as follows: the light-shielding blade is movably fixed by the cooperation of the blade support ring and the blade drive ring, the electromagnetic drive assembly drives the drive rod to rotate relative to the base through the Lorentz force between the driving magnet and the drive coil, and the drive rod is slidably connected to the blade drive ring, thereby driving the blade drive ring to rotate, thereby driving the light-shielding blade to rotate through the blade drive ring to block or expose the lens of the camera module. In this way, the aperture part and the electromagnetic drive assembly are separated from the lens, which can optimize the counterweight of the camera module and reduce the burden on the autofocus mechanism. At the same time, due to the overall independent setting, the electrical wiring of the electromagnetic drive assembly can be set on the periphery of the lens without affecting the focusing movement of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0011] FIG1 is a schematic diagram of the three-dimensional structure of an adjustable iris according to some embodiments of the present application;

[0012] FIG2 is a front view of the adjustable iris shown in FIG1 ;

[0013] FIG3 is a schematic cross-sectional view of the adjustable aperture shown in FIG2 along line AA′;

[0014] FIG4 is an exploded schematic diagram of the structure of an adjustable iris according to some embodiments of the present application;

[0015] FIG5 is a front view of an electromagnetic drive assembly of an adjustable iris according to some embodiments of the present application;

[0016] FIG6 is a schematic cross-sectional view of the electromagnetic drive assembly shown in FIG5 along line BB';

[0017] FIG7 is a schematic diagram of the cooperation between the driving arm and the driving shaft of the adjustable iris in some embodiments of the present application;

[0018] FIG8 is a schematic diagram showing that a driving coil of an adjustable iris rotates counterclockwise due to the Lorentz force in some embodiments of the present application;

[0019] FIG9 is a schematic diagram showing that a driving coil of an adjustable iris rotates clockwise under the action of a Lorentz force in some embodiments of the present application;

[0020] FIG10 is a front view of another electromagnetic drive assembly of an adjustable iris according to some embodiments of the present application;

[0021] FIG11 is a cross-sectional schematic diagram of the electromagnetic drive assembly shown in FIG10 along line CC';

[0022] FIG12 is a schematic diagram of the three-dimensional structure of a blade support ring of an adjustable aperture according to some embodiments of the present application;

[0023] FIG13 is a schematic diagram of an adjustable iris fully opened according to some embodiments of the present application;

[0024] FIG14 is a schematic diagram of an adjustable iris fully closed in some embodiments of the present application;

[0025] FIG15 is a schematic diagram of the three-dimensional structure of an adjustable iris according to other embodiments of the present application;

[0026] FIG16 is a front view of an electromagnetic drive assembly of an adjustable iris according to other embodiments of the present application;

[0027] FIG17 is a cross-sectional schematic diagram of the electromagnetic drive assembly shown in FIG16 along line DD';

[0028] FIG18 is a front view of a blade drive ring of an adjustable iris according to yet other embodiments of the present application;

[0029] FIG19 is a rear view of a blade support ring of an adjustable iris according to yet other embodiments of the present invention;

[0030] FIG20 is a schematic diagram of the shading blades of the adjustable iris fully opened in some other embodiments of the present application;

[0031] FIG21 is a schematic diagram of the shading blades of the adjustable iris in some other embodiments of the present application being fully closed;

[0032] FIG22 is a schematic diagram of the shading blades of the adjustable iris in some other embodiments of the present application being fully opened;

[0033] FIG23 is a schematic diagram of the shading blades of the adjustable iris in some other embodiments of the present application being fully closed;

[0034] FIG24 is a rear view of a blade support ring of an adjustable iris according to yet other embodiments of the present application;

[0035] FIG25 is a schematic diagram of the three-dimensional structure of a camera module according to some embodiments of the present application;

[0036] FIG26 is a front view of the camera module shown in FIG25;

[0037] FIG27 is a schematic diagram of the three-dimensional structure of another camera module according to some embodiments of the present application;

[0038] FIG28 is a schematic diagram of the three-dimensional structure of an electronic device according to some embodiments of the present application. Modes for Carrying Out the Invention

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in each embodiment of the present application to help readers better understand the present application. However, even without these technical details and various variations and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.

[0040] The purpose of the embodiments of the present application is to provide an adjustable aperture, a camera module and an electronic device, which can optimize the counterweight of the camera module and avoid interfering with the focus drive of the camera module.

[0041] An embodiment of the present application provides an adjustable aperture, which is used to movably fix the shading blade by cooperating with a blade support ring and a blade drive ring. The electromagnetic drive assembly drives the drive rod to rotate relative to the base through the Lorentz force between the driving magnet and the drive coil. The drive rod is slidably connected to the blade drive ring, thereby driving the blade drive ring to rotate, thereby driving the shading blade to rotate through the blade drive ring to block or expose the lens of the camera module. In this way, the aperture part and the electromagnetic drive assembly are separated from the lens, which can optimize the counterweight of the camera module and reduce the burden on the autofocus mechanism. At the same time, due to the overall independent setting, the electrical wiring of the electromagnetic drive assembly can be set on the periphery of the lens without affecting the focusing movement of the lens.

[0042] Some embodiments of the present application relate to an adjustable iris 100, as shown in Figures 1 to 4, comprising: a light-shielding blade 101; a blade support ring 102, wherein the light-shielding blade 101 is rotatably fixed to the blade support ring 102; a blade drive ring 103, which is coaxial with the blade support ring 102 and fixed to the object side of the blade support ring 102, and wherein the blade drive ring 103 is rotatable relative to the blade support ring 102; the light-shielding blade 101 is slidably connected to the blade drive ring 103; an electromagnetic drive assembly 104, comprising a base 1041, a drive magnet 1042, a drive rod 1043, and a drive coil 1044. 44. The driving magnet 1042 is fixed to the base 1041, the driving rod 1043 is rotatably fixed to the base 1041, and the driving coil 1044 is fixed to the driving rod 1043 and is arranged opposite to the driving magnet 1042; the driving rod 1043 is movably connected to the blade driving ring 103; the driving magnet 1042 drives the driving coil 1044 to rotate when the driving coil 1044 is energized, and the driving rod 1043 drives the blade driving ring 103 to rotate and drives the shading blade 101 to block or expose the lens of the camera module.

[0043] The adjustable aperture 100 provided in this application is used to movably fix the light-shielding blade 101 through the blade support ring 102 and the blade drive ring 103. The electromagnetic drive assembly 104 drives the drive rod 1043 to rotate relative to the base 1041 through the Lorentz force between the drive magnet 1042 and the drive coil 1044. The drive rod 1043 is slidably connected to the blade drive ring 103, thereby driving the blade drive ring 103 to rotate, thereby driving the light-shielding blade 101 to rotate through the blade drive ring 103 to block or expose the lens of the camera module. In this way, the aperture part and the electromagnetic drive assembly 104 are separated from the lens, which can optimize the counterweight of the camera module and reduce the burden on the autofocus mechanism. At the same time, due to the overall independent setting, the electrical wiring of the electromagnetic drive assembly 104 can be set on the periphery of the lens without affecting the focusing movement of the lens.

[0044] It should be noted that the shading blades 101 do not completely block the lens. That is, when the shading blades 101 reach the maximum blocking area of ​​the lens, a certain area of ​​the lens is still exposed. It is understandable that, if necessary, the shading blades 101 can also completely block the lens when the shading blades 101 reach the maximum blocking area of ​​the lens.

[0045] Please refer to Figures 4 and 5 again. In this embodiment, the driving rod 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, and the driving coil 1044 is fixed to the mounting portion 1043a. There are two driving arms 1043b, and the two driving arms 1043b are spaced apart to form a driving groove 1043c. The blade driving ring 103 includes a driving ring portion 1031 and a driving shaft 1032 fixedly connected to the driving ring portion 1031. The driving shaft 1032 can be slidably extended into the driving groove 1043c.

[0046] Please refer to Figures 3 and 4 again. Specifically, the driving rod 1043 can be rotatably connected to the base 1041 by a pivot connection, for example, a pivot shaft 1045 is inserted into and fixed to the base 1041, and the mounting portion 1043a is rotatably sleeved on the outer periphery of the pivot shaft 1045 relative to the pivot shaft 1045; or, the pivot shaft 1045 is rotatably inserted into the base 1041 relative to the base 1041, and the pivot shaft 1045 and the mounting portion 1043a are fixedly connected; or, the pivot shaft 1045 is rotatable relative to both the base 1041 and the mounting portion 1043a.

[0047] When the drive coil 1044 is energized, it moves under the influence of the Lorentz force within 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 constrained by the pivot shaft 1045, the mounting portion 1043a rotates relative to the base 1041, thereby driving the two drive arms 1043b to rotate about the axis of the pivot shaft 1045. The drive shaft 1032 of the blade drive ring 103 slidably extends into the drive slot 1043c formed by the two drive arms 1043b. When the two drive arms 1043b rotate, they push the drive shaft 1032, causing the drive ring portion 1031 to rotate about its axis. The rotation of the drive ring portion 1031 drives the light-shielding blades 101 to move, thereby shielding or revealing the lens of the camera module.

[0048] Please refer to Figures 5 to 7. Furthermore, the side walls opposite to each other of the two drive arms 1043b are both configured as outwardly protruding arc side walls, and the drive shaft 1032 is cylindrical. In actual scenarios, due to the counterweight problem of the camera module or the influence of vibration, the lens of the camera module may tilt, and the tilt of the lens may also cause the blade drive ring 103 to tilt, ultimately causing the drive shaft 1032 to tilt relative to the two drive arms 1043b. If the side walls opposite to each other of the two drive arms 1043b are flat or concave, the drive shaft 1032 may become stuck, resulting in failure of the transmission between the drive arm 1043b and the drive shaft 1032. When the opposite side walls of the two driving arms 1043b are set as arc side walls protruding outward, or in other words, as partial side walls of a cylinder, when the driving shaft 1032 tilts, the upper and lower parts of the arc side walls can provide a certain avoidance space to avoid the driving shaft 1032, so that the driving shaft 1032 is not stuck, thereby smoothly realizing transmission.

[0049] Furthermore, in order to enable the driving shaft 1032 to move smoothly in the driving groove 1043c, the surface accuracy of the two arc side walls can be set according to actual needs to make them smooth enough.

[0050] In some embodiments, the mounting portion 1043a and the two driving arms 1043b are integrally provided, thereby reducing the number of components of the adjustable iris 100, lowering the difficulty of assembly, and improving production efficiency.

[0051] Please refer to 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. The first sub-magnet 1042a and the second sub-magnet 1042b are arranged at an angle, and the magnetic poles of the first sub-magnet 1042a and the second sub-magnet 1042b adjacent to the blade support ring 102 are different. When the driving coil 1044 is energized, it is acted upon by forces in the same direction in the magnetic fields of the first sub-magnet 1042a and the second sub-magnet 1042b, thereby driving the driving rod 1043 to rotate.

[0052] For example, as shown in Figures 4, 8, and 9, the base 1041 is generally W-shaped, with the pivot shaft 1045 located in the middle of the base 1041. The first sub-magnet 1042a and the second sub-magnet 1042b are located on opposite sides of the middle of the base 1041, and are fixed together with the inclined arms 1041a at both ends of the base 1041. The axes of the first sub-magnet 1042a and the second sub-magnet 1042b are arranged at an angle between 0° and 180° (excluding 0° and 180°), such as 120° or other angles. The north pole of the first sub-magnet 1042a is adjacent to the blade support ring 102, while the south pole is away from the blade support ring 102. The south pole of the second sub-magnet 1042b is adjacent to the blade support ring 102, while the north pole is away from the blade support ring 102. When a clockwise current flows through the drive coil 1044 (as shown by the dotted arrow in Figure 8), according to the left-hand rule, the drive coil 1044 is subjected to a downward Lorentz force in the magnetic field of the first sub-magnet 1042a, and the drive coil 1044 is subjected to an upward Lorentz force in the magnetic field of the second sub-magnet 1042b. Since the drive coil 1044 is fixed to the mounting portion 1043a, under the constraint of the pivot shaft 1045, the drive coil 1044 drives the mounting portion 1043a and the drive arm 1043b to rotate counterclockwise (as shown by the curved arrow in Figure 8), and the drive arm 1043b drives the blade drive ring 103 to rotate clockwise, so that the light-shielding blade 101 blocks the lens of the camera module. On the contrary, when a counterclockwise current flows through the driving coil 1044 (as shown by the dotted arrow in Figure 9), the force direction of the driving coil 1044 is opposite, thereby driving the mounting portion 1043a and the driving arm 1043b to rotate clockwise (as shown by the curved arrow in Figure 9). The driving arm 1043b drives the blade driving ring 103 to rotate counterclockwise, so that the light-shielding blade 101 exposes the lens of the camera module.

[0053] In this embodiment, the drive rod 1043 is generally plate-shaped, and its thickness direction is parallel to the axial direction of the drive ring portion 1031. At this time, the rotation plane of the mounting portion 1043a and the two drive arms 1043b is perpendicular to the axis of the drive ring portion 1031. That is, the plane in which the mounting portion 1043a and the two drive arms 1043b rotate is perpendicular to the axis of the drive ring portion 1031. It can be understood that the first sub-magnet 1042a and the second sub-magnet 1042b are both rectangular parallelepipeds, and the planes in which their magnetic poles are located are perpendicular to the thickness direction of the drive rod 1043. This is a configuration adopted based on the characteristics of the Lorentz force.

[0054] It is understood that clockwise rotation of the blade drive ring 103 drives the light-shielding blade 101 to block the camera, and counterclockwise rotation of the blade drive ring 103 drives the light-shielding blade 101 to expose the camera. This is only one feasible method. Conversely, through appropriate configuration, the clockwise rotation of the blade drive ring 103 can also drive the light-shielding blade 101 to expose the camera, and counterclockwise rotation of the blade drive ring 103 can 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. As long as they are appropriately configured so that when the drive coil 1044 is energized, the drive coil 1044 is affected by the Lorentz force and drives the mounting portion 1043a and 1043b to rotate.

[0055] Please refer to FIG. 5 and FIG. 6 again. In this embodiment, the adjustable iris 100 further includes a closed magnetic yoke 105 . The closed magnetic yoke 105 is disposed on the mounting portion 1043 a . The closed magnetic yoke 105 is configured to form a closed magnetic field with the driving magnet 1042 .

[0056] Specifically, the closed magnetic yoke 105 can be arranged on the side of the mounting portion 1043a away from the drive coil 1044. The closed magnetic yoke 105 and the first sub-magnet 1042a and the second sub-magnet 1042b form a closed magnetic field, which can prevent magnetic leakage and improve the driving efficiency of the first sub-magnet 1042a and the second sub-magnet 1042b on the drive coil 1044 when the drive coil 1044 is energized. Furthermore, when the driving coil 1044 is not energized, the closed magnetic yoke 105 can keep the position of the driving coil 1044 relatively stable by continuously applying magnetic attraction to the driving coil 1044, thereby keeping the amount of light entering the adjustable aperture 100 stable. Even if it is affected by unexpected vibration, causing the size of the light inlet of the adjustable aperture 100 to change, the closed magnetic yoke 105 can also attract the driving coil 1044 to drive the driving arm 1043b to move, and then drive the driving ring part 1031 to rotate through the driving arm 1043b to restore the size of the light inlet to its original state. That is, the closed magnetic yoke 105 can also play a role similar to a spring, eliminating the influence of vibration on the adjustable aperture 100. At the same time, in the process of driving the driving ring part 1031, the closed magnetic yoke 105 can also use this magnetic attraction to eliminate jitter or shaking during the transmission process, thereby improving stability.

[0057] Please refer to Figures 10 and 11. In other feasible embodiments, the setting positions of the driving magnet 1042 and the driving coil 1044 can be interchanged, that is, the driving magnet 1042 is set on the mounting portion 1043a, and the driving coil 1044 is set on the base 1041. In this case, the closed magnetic yoke 105 may not be set. The movement of this setting is still achieved by the drive of the Lorentz force. The settings of other components are roughly the same and are not described in detail.

[0058] Please refer to Figures 4 to 6 again. In some embodiments, the adjustable aperture 100 further includes a position detection element 106. The position detection element 106 is disposed on the mounting portion 1043a. The position detection element 106 detects the rotation angle of the blade drive ring 103 by detecting the relative position of the drive magnet 1042.

[0059] Specifically, the position detection element 106 can be disposed on a side of the mounting portion 1043a facing the drive magnet 1042, for example, adjacent to the drive coil 1044. When the mounting portion 1043a rotates, the position detection element 106 changes relative to both the first sub-magnet 1042a and the second sub-magnet 1042b. At different positions, 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 vary. The position detection element 106 detects these changes to determine the rotation angle of the mounting portion 1043a. The rotation angle of the mounting portion 1043a and the rotation angle of the drive ring portion 1031 can be pre-set to correspond to actual needs. This correspondence between the rotation angles of different components is clear to those skilled in the art and will not be elaborated upon here.

[0060] Optionally, the position detection element 106 may be a Hall element.

[0061] Referring again to Figures 4 and 5 , in this embodiment, the adjustable aperture 100 further includes a flexible circuit board 107. The flexible circuit board 107 is fixed to the mounting portion 1043a and positioned between the mounting portion 1043a and the drive coil 1044. The flexible circuit board 107 electrically connects the drive coil 1044 and the position detection element 106. The flexible circuit board 107 includes a fixed portion 1071 fixed to the mounting portion 1043a and a bent portion 1072 extending in a curved shape. The fixed portion 1071 and the bent portion 1072 can be provided separately and electrically connected, or integrally. The fixed portion 1071 can be secured to the mounting portion 1043a using screws, rivets, or the like. The drive coil 1044 and the position detection element 106 are then provided on a side of the fixed portion 1071 facing away from the mounting portion 1043a. The fixing portion 1071 is electrically connected to the driving coil 1044 and the position detection element 106, and is electrically connected to a power supply (not shown in the figure) and a control chip (not shown in the figure) via the bending portion 1072. The position information detected by the position detection element 106 is sent to the control chip through the flexible circuit board 107. The control chip then issues a control instruction based on the received position information to adjust the direction and / or magnitude of the current provided to the driving coil 1044, so as to adjust the rotation direction and / or rotation angle of the driving ring portion 1031, and thereby adjust the size of the light inlet of the adjustable aperture 100.

[0062] Furthermore, during the rotation of the mounting portion 1043a, the flexible circuit board 107 exerts a certain reaction force on the mounting portion 1043a. To reduce this effect, the bending portion 1072 may be bent multiple times, such as more than twice.

[0063] Please refer to Figures 1, 4 and 12 again. In this embodiment, the blade supporting ring 102 includes a supporting ring portion 1021 and a side wall 1022 extending from the supporting ring portion 1021 toward the blade driving ring 103, and the side wall 1022 extends along the circumference of the supporting ring portion 1021; the side wall 1022 has an arc-shaped notch 1023; the driving ring portion 1031 is accommodated in the space enclosed by the side wall 1022 and is arranged opposite to the supporting ring portion 1021, and the driving shaft 1032 extends to the periphery of the side wall 1022 through the arc-shaped notch 1023, and is bent to extend toward the driving arm 1043b.

[0064] Specifically, when the drive shaft 1032 rotates to a certain position, the drive shaft 1032 is blocked by the end of the side wall 1022 located at the arc-shaped notch 1023 and cannot continue to rotate. Therefore, 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. The space enclosed by the support ring portion 1021, the side wall 1022, and the drive ring portion 1031 constitutes a blade chamber for accommodating the light-shielding blade 101. The light-shielding blade 101 moves within the blade chamber to change the size of the light inlet of the adjustable aperture 100.

[0065] Referring again to FIG. 12 , and also to FIG. 13 and FIG. 14 , more specifically, the support ring portion 1021 is provided with a positioning hole 1021a, the drive ring portion 1031 is provided with a slide groove 1031a extending radially along the drive ring portion 1031, and a positioning portion 1011 is provided on the image side of the light shielding blade 101. The positioning portion 1011 is rotatably inserted into the positioning hole 1021a relative to the support ring portion 1021. The object side of the light shielding blade 101 is provided with a sliding portion 1012. The sliding portion 1012 is slidably inserted into the slide groove 1031a relative to the drive ring portion 1031. When the drive ring portion 1031 rotates, the sliding portion 1012 slides in the slide groove 1031a, and the light shielding blade 101 is constrained by the positioning portion 1011 and can only rotate about the axis of the positioning portion 1011, thereby shielding or revealing the lens.

[0066] Please refer to Figure 3 again. Since the driving ring portion 1031 needs to rotate relative to the supporting ring portion 1021 during the process of driving the shading blade 101, in order to reduce the friction resistance of the supporting ring portion 1021 to the driving ring portion 1031, an annular protrusion 1031b extending circumferentially along the driving ring portion 1031 can be provided on the side of the driving ring portion 1031 facing the supporting ring portion 1021, and the cross-sectional shape of the annular protrusion 1031b in the radial direction of the driving ring portion 1031 is semicircular; or, it can be a plurality of hemispherical protrusions spaced apart circumferentially along the driving ring portion 1031; or, a plurality of grooves (not shown in the figure) can be spaced apart circumferentially on the driving ring portion 1031, and balls (not shown in the figure) can be provided in the grooves.

[0067] Optionally, the light-shielding blades 101 in this embodiment may be multiple, for example, three or more, more specifically, five. The light-shielding blades may be in the shape of an arc, one end of which is provided with the positioning portion 1011 and the other end of which is provided with the sliding portion 1012. The multiple light-shielding blades 101 are arranged at intervals along the circumference of the supporting ring portion 1021, and any adjacent light-shielding blades 101 are arranged overlappingly. For example, the end of a light-shielding blade 101 provided with the positioning portion 1011 is placed on the image side of the light-shielding blade 101 adjacent to this end, while the end provided with the sliding portion 1012 is placed on the object side of the light-shielding blade adjacent to this end. The same applies to the other light-shielding blades 101. Correspondingly, the supporting ring portion 1021 is provided with multiple positioning holes 1021a at intervals along the circumference, and the drive ring portion 1031 is provided with multiple sliding grooves 1031a at intervals along the circumference.

[0068] Multiple light-shielding blades 101 form the light inlet of the adjustable aperture 100. It is understood that the greater the number of light-shielding blades 101, the closer the enclosed light inlet is to a circle, and the more precise and delicate the adjustment effect. However, the greater the number of light-shielding blades 101, the greater the weight, volume, and assembly difficulty. Therefore, the number of light-shielding blades 101 is generally set between three and six, and may be set to more if required.

[0069] In this embodiment, the arc length of the shading blade 101 is set to 30% to 60% of the circumference of the corresponding circle. This can not only avoid the shading blade 101 from being too heavy and ensure the sensitivity of the adjustable aperture 100, but also avoid the shading blades 101 from interfering with each other during movement.

[0070] Furthermore, the area of ​​the light inlet surrounded by the shading blades 101 may be 30% to 60% of the circular area corresponding to the shading blades 101 .

[0071] In this embodiment, the support ring portion 1021 is provided with a plurality of support legs 1024 spaced apart along the circumference. The plurality of support legs 1024 are located at the outer edge of the support ring portion 1021 or on a side facing away from the drive ring portion 1031, and extend in a direction away from the drive ring portion 1031. When the adjustable aperture 100 is mounted on the camera module, the plurality of support legs 1024 abut against the lens, maintaining a certain distance between the support ring portion 1021 and the lens, thereby preventing the support ring portion 1021 from interfering with the focusing movement of the lens.

[0072] Referring again to Figures 1 to 4 and Figure 12, in this embodiment, the adjustable iris 100 further includes an arc-shaped positioning member 108. The arc-shaped positioning member 108 is disposed within the space enclosed by the sidewalls 1022 and is located on a side of the drive ring portion 1031 facing away from the support ring portion 1021. The arc-shaped positioning member 108 is used to axially secure the drive ring portion 1031. Thus, the arc-shaped positioning member 108 secures the drive ring portion 1031 axially, preventing the drive ring portion 1031 from escaping from the space enclosed by the sidewalls 1022.

[0073] Furthermore, the inner surface of the side wall 1022 is provided with a circumferentially extending positioning groove 1022a, and the arc-shaped positioning member 108 is partially embedded in the positioning groove 1022a. By partially positioning the arc-shaped positioning member 108 in the positioning groove 1022a and utilizing the positioning groove 1022a to position the arc-shaped positioning member 108, the arc-shaped positioning member 108 can continuously and stably maintain the position of the drive ring portion 1031.

[0074] It can be understood that since the drive shaft 1032 needs to move in the arc-shaped notch 1023, the arc-shaped positioning member 108 is set to be C-shaped, which is neither a complete circle, and its fracture corresponds to the arc-shaped notch 1023, and can also be slightly longer or slightly shorter than the arc length of the arc-shaped notch 1023.

[0075] Optionally, the arc-shaped positioning member 108 can be made of metal, polymer or other materials. The arc-shaped positioning member 108 needs to avoid affecting the rotation of the driving ring portion 1031. The arc-shaped positioning member 108 can preferably be made of plastic, which has appropriate hardness and toughness, is not easy to break, has low density, is light in weight, and the plastic surface can be set to be relatively smooth.

[0076] Some embodiments of the present application provide an adjustable aperture 100 , which is substantially the same as the adjustable aperture 100 of the aforementioned embodiment, with the main difference being that the rotation planes of the two driving arms 1043 b are parallel to the axis of the driving ring portion 1031 .

[0077] Please refer to Figures 15 to 17. In this embodiment, the thickness direction of the plate-shaped driving rod 1043 is perpendicular to the axial direction of the driving ring portion 1031. It can be understood that 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 setting of the driving rod 1043.

[0078] Furthermore, the driving shaft 1032 can be directly arranged on the side of the driving ring portion 1031 facing the base 1041, and extend along the axial direction of the driving ring portion 1031. The two driving arms 1043b are located on opposite sides of the driving shaft 1032. The driving shaft 1032 can be set to be cylindrical, or a hemispherical protrusion, or a combination of the two.

[0079] Furthermore, the drive shaft 1032 can be set to multiple, and the multiple drive shafts 1032 are arranged at intervals along the circumference of the drive ring portion 1031. At this time, the cooperation between the two drive arms 1043b and the multiple drive shafts 1032 is similar to two gears with their axes perpendicular to each other.

[0080] Some embodiments of the present application provide an adjustable iris 100 . The adjustable iris 100 of this embodiment is substantially the same as the adjustable iris 100 of the aforementioned embodiment, with the main difference being that the number of the light-shielding blades 101 is reduced.

[0081] Please refer to Figures 18 and 19. Specifically, there are two shading blades 101, and they are rotationally symmetrically arranged on the supporting ring portion 1021 with the axis of the driving ring portion 1031 as the rotation axis. Correspondingly, the supporting ring portion 1021 is provided with two positioning holes 1021a, and the driving ring portion 1031 is also provided with two sliding grooves 1031a.

[0082] It should be noted that in this embodiment, the extension direction of the slide groove 1031a in the first embodiment is adjusted. Specifically, the slide groove 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 extension direction of the slide groove 1031a is set at an angle to the radial direction of the driving ring portion 1031. The specific angle size can be adaptively adjusted according to the specific shape, size and opening requirements of the shading blade 101, which will not be elaborated here.

[0083] For example, as shown in Figures 20 and 21, the light shielding blades 101 are roughly "J"-shaped, with the curved portion having an arc edge. When the lens drive ring 1031 drives the two light shielding blades 101 to approach each other to the extreme position, the arc edges of the two light shielding blades 101 combine to form a circle. The "extreme position" refers to the position corresponding to when the two light shielding blades 101 move to the maximum blocking area of ​​the lens when the adjustable aperture 100 is mounted on the camera module.

[0084] Compared with the above-mentioned embodiments, this embodiment reduces the number of components of the adjustable iris 100 , thereby reducing the workload of assembling the adjustable iris 100 and improving production efficiency.

[0085] Some embodiments of the present application provide an adjustable iris 100 . The adjustable iris 100 of this embodiment is substantially the same as the adjustable iris 100 of the aforementioned embodiment, with the main difference being that the number of the light-shielding blades 101 is further reduced.

[0086] Please refer to Figures 22 to 24. In this embodiment, there is only one light-shielding blade 101. In this case, the light-shielding blade 101 may include a light-shielding portion 1013 for shading light and a connecting shaft 1014 connected to the light-shielding portion 1013, similar to a circular sector with a through hole. The positioning portion 1011 is provided at an end of the connecting shaft 1014 away from the light-shielding portion 1013 and is located on the image side of the connecting shaft 1014. The sliding portion 1012 is provided in the middle of the connecting shaft 1014 and is located on the image side of the connecting shaft 1014.

[0087] It can be understood that, as shown in Figure 23, in this embodiment, the slide groove 1031a is arranged on the supporting ring portion 1021, the sliding portion 1012 passes through the slide groove 1031a, and the supporting ring portion 1021 is adaptively adjusted to a special shape, and the inner edge of the supporting ring portion 1021 can be set to a contour shape that matches the edge of the shading blade 101, which can limit the movement range of the shading blade 101 and also achieve the function of supporting the shading blade 101.

[0088] In this embodiment, the sliding portion 1012 can be directly driven by the driving arm 1043b, so that the sliding portion 1012 drives the shading portion 1013 to rotate with the axis of the positioning portion 1011 as the rotating axis. In this way, the driving shaft 1032 may not be provided on the driving ring portion 1031. At this time, the driving ring portion 1031 mainly plays the role of axially fixing the shading blade 101, that is, preventing the shading blade 101 from detaching from the supporting ring portion 1021 in the axial direction of the supporting ring portion 1021.

[0089] Furthermore, the light shielding portion 1013 can be configured in a circular shape, that is, the light shielding portion 1013 has a circular hole 1013a. When the light shielding blade 101 moves to a maximum shielding area for the lens, the circular hole 1013a and the lens are substantially coaxial. Alternatively, a plurality of circular holes 1013a can be provided on the light shielding portion 1013. The specific size and location of the holes 1013a can be adjusted according to actual needs and are not specifically limited in this embodiment.

[0090] Compared with the above-mentioned embodiments, this embodiment further reduces the number of components of the adjustable iris 100 and simplifies the structure of the blade drive ring 103 , thereby reducing the workload of assembling the adjustable iris 100 and improving production efficiency.

[0091] Some embodiments of the present application provide a camera module 200, comprising: a lens 201, an autofocus mechanism 202, and the adjustable iris 100 described in any of the above embodiments, wherein the autofocus mechanism 202 includes a housing 2021 for accommodating the lens 201, the adjustable iris 100 is fixed to the housing 2021, and the blade support ring 102 of the adjustable iris 100 is located on the object side of the lens 201. The optical axis LA of the camera module 200 coincides with the axis of the support ring portion 1021 and the axis of the drive ring portion 1031. Figures 25 and 26 are schematic diagrams of the camera module equipped with the adjustable iris 100 of the first embodiment; Figure 27 is a schematic diagram of the camera module 200 equipped with the adjustable iris 100 of the second embodiment.

[0092] Specifically, the lens 201 includes a lens group 2011 and a lens housing 2012 . The lens group 2011 is accommodated in the lens housing 2012 , and the plurality of supporting legs 1024 abut against the lens housing 2012 .

[0093] In this embodiment, the camera module may further include an anti-shake mechanism (not shown in the figure), which is arranged on the image side of the housing 2021. The anti-shake mechanism can achieve shake correction by driving the sensor (not shown in the figure) of the camera module to move.

[0094] Some embodiments of the present application provide an electronic device 300 , as shown in FIG28 , wherein the electronic device 300 includes a device body 301 and a camera module 200 as described in the aforementioned embodiment, and the camera module 200 is disposed on the device body 301 .

[0095] In this embodiment, the electronic device 300 can be a smart phone, a tablet computer, a smart watch, a camera or other electronic device equipped with the camera module provided in this application, and this application does not make any specific limitations on this.

[0096] It should also be noted that those skilled in the art will appreciate that, in the various embodiments of this application, many technical details are provided to help readers better understand this application. However, even without these technical details and the various variations and modifications based on the above embodiments, the technical solutions claimed in this application can be implemented. The division of the above embodiments is for convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with each other and referenced to each other without contradiction.

Claims

1. An adjustable diaphragm, applied to a camera module (200), wherein: include: Shading blade (101); A blade supporting ring (102), the light shielding blade (101) being rotatably fixed to the blade supporting ring (102); a blade drive ring (103) coaxial with the blade support ring (102) and fixed to the object side of the blade support ring (102); the blade drive ring (103) is rotatable relative to the blade support ring (102); and the light shielding blade (101) is slidably connected to the blade drive ring (103); An electromagnetic drive assembly (104), comprising a base (1041), a drive magnet (1042), a drive rod (1043), and a drive coil (1044); the drive magnet (1042) is fixed to the base (1041); the drive rod (1043) is rotatably fixed to the base (1041); the drive coil (1044) is fixed to the drive rod (1043) and is arranged opposite to the drive magnet (1042); the drive rod (1043) is movably connected to the blade drive ring (103); When the driving coil (1044) is energized, the driving magnet (1042) drives the driving coil (1044) to drive the driving rod (1043) to rotate, and the driving rod (1043) drives the blade driving ring (103) to rotate to drive the shading blade (101) to cover or expose the lens (201) of the camera module (200).

2. The adjustable diaphragm according to claim 1, wherein: The driving magnet (1042) comprises a first sub-magnet (1042a) and a second sub-magnet (1042b), wherein the first sub-magnet (1042a) and the second sub-magnet (1042b) are arranged at an angle interval, and 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 the driving coil (1044) is energized, it is acted upon by forces in the same direction in the magnetic fields of the first sub-magnet (1042a) and the second sub-magnet (1042b), thereby driving the driving rod (1043) to rotate.

3. The adjustable diaphragm according to claim 1, wherein: The driving rod (1043) comprises 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), and the two driving arms (1043b) are arranged at intervals to form a driving slot (1043c); The blade driving ring (103) comprises a driving ring portion (1031) and a driving shaft (1032) fixedly connected to the driving ring portion (1031); the driving shaft (1032) can slidably extend into the driving groove (1043c).

4. The adjustable diaphragm according to claim 3, wherein: It also includes a position detection element (106), wherein the position detection element (106) is arranged on the mounting portion (1043a), and the position detection element (106) detects the rotation angle of the blade drive ring (103) by detecting the relative position of the drive magnet (1042).

5. The adjustable diaphragm according to claim 4, wherein: It also includes a flexible circuit board (107), the flexible circuit board (107) being fixed to the mounting portion (1043a) and being located between the mounting portion (1043a) and the driving coil (1044), the flexible circuit board (107) being electrically connected to the driving coil (1044) and the position detection element (106).

6. The adjustable diaphragm according to claim 3, wherein: The blade support ring (102) comprises 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) extending along the circumference of the support ring portion (1021); the side wall (1022) has an arc-shaped notch (1023); The blade drive ring (103) comprises a drive ring portion (1031) and a drive shaft (1032) fixedly connected to the drive ring portion (1031); the drive ring portion (1031) is accommodated in a space surrounded by the side wall (1022) and is arranged opposite to the support ring portion (1021); the drive shaft (1032) extends through the arc-shaped notch (1023) to the periphery of the side wall (1022) and is bent to extend toward the drive arm (1043b).

7. The adjustable diaphragm according to claim 6, wherein: It also includes an arc-shaped positioning member (108), wherein the arc-shaped positioning member (108) is arranged in the space enclosed by the side wall (1022) and is located on the side of the driving ring portion (1031) away from the supporting ring portion (1021), and the arc-shaped positioning member (108) is used to fix the driving ring portion (1031) in the axial direction of the driving ring portion (1031).

8. The adjustable diaphragm according to claim 7, wherein: The inner wall surface of the side wall (1022) is provided with a circumferentially extending positioning groove (1022a), and the arc-shaped positioning piece (108) is partially embedded in the positioning groove (1022a).

9. The adjustable diaphragm according to claim 3, wherein: It also comprises a closed magnetic yoke (105), wherein the closed magnetic yoke (105) is arranged on the mounting portion (1043a), and the closed magnetic yoke (105) is used to form a closed magnetic field with the driving magnetic steel (1042).

10. The adjustable diaphragm according to claim 3, wherein: The opposite side walls of the two driving arms (1043b) are both configured as arc side walls protruding outwards, and the driving shaft (1032) is cylindrical.

11. A camera module, wherein: The invention comprises a lens (201), an autofocus mechanism (202), and an adjustable iris (100) as claimed in any one of claims 1 to 10, wherein the autofocus mechanism (202) comprises a housing (2021) for accommodating the lens (201), the adjustable iris (100) is fixed to the housing (2021), and a blade support ring (102) of the adjustable iris (100) is located on the object side of the lens (201).

12. An electronic device, wherein: It comprises a device body (301) and a camera module (200) as claimed in claim 11, wherein the camera module (200) is arranged on the device body (301).

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