Camera module with variable aperture and electronic device

Abstract

The present invention discloses a camera module and electronic equipment with a variable aperture, comprising a lens unit, a variable aperture unit arranged on the light incident side of the lens unit along the optical axis, and an imaging unit arranged on the imaging side of the lens unit along the optical axis; the variable aperture unit comprises a base mechanism arranged on the lens unit and an aperture adjustment mechanism arranged on the base mechanism; the imaging unit comprises a housing arranged on the lens unit and an autofocus mechanism, a filter mechanism and a processing mechanism stacked in sequence within the housing; the filter mechanism and the processing mechanism are fixed and floatingly arranged on the inner side of the autofocus mechanism; an end of the lens unit corresponding to the imaging side passes through the autofocus mechanism and is coaxially opposite to the filter mechanism; compared with the prior art, the aperture of the present invention is adjustable and does not require the entire lens unit and the variable aperture unit to be moved during adjustment, the kinetic energy required for driving is small, and the adjustment is stable.

Description

Technical Field

[0001] The present invention relates to the field of camera technology, and in particular to a camera module with variable aperture and electronic equipment. Background Art

[0002] Most existing electronic devices (such as mobile phones, tablets, and laptops) are equipped with cameras that can match the imaging capabilities of professional cameras. In addition to conventional pixel indicators, aperture size, sensor volume, and other factors have gradually become important indicators for evaluating the performance of electronic devices. Regarding the aperture size issue, electronic device manufacturers usually increase the aperture to increase the amount of light entering and improve the imaging effect of electronic devices under low ambient light sources. However, blindly increasing the aperture may cause problems with edge image quality and highlight bleeding, which in turn shortens the depth of field and prevents the full presentation of details in high-brightness environments, making the blur caused by defocus more severe and increasing the difficulty of depth of focus processing. On the other hand, reducing the aperture will inevitably affect the imaging effect of electronic devices, making it impossible for existing cameras to take into account both the shooting effect under small apertures and the edge image quality and highlight bleeding under large apertures.

[0003] Currently, to balance edge image quality and highlight bleeding at large apertures with imaging quality at small apertures, a variable aperture is typically installed on the light-entry side of the camera. The aperture of the variable aperture can be adjusted based on ambient brightness to adapt to different shooting environments, thereby ensuring the camera's shooting quality. However, existing variable apertures are bulky and heavy. Their integration into the lens increases the overall weight of the lens, resulting in the motor being unable to move the lens and iris during autofocus. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a camera module and electronic device with variable aperture to solve the problems in the prior art such as shortened depth of field caused by large aperture, increased difficulty in depth of focus process, poor photographic effect, and inability of the motor to drive the lens and variable aperture.

[0005] To achieve the above-mentioned purpose, a technical solution of the present invention provides a camera module with variable aperture, comprising a lens unit, a variable aperture unit arranged on the light incident side of the lens unit along the optical axis, and an imaging unit arranged on the imaging side of the lens unit along the optical axis; the variable aperture unit comprises a base mechanism arranged on the lens unit and an aperture adjustment mechanism arranged on the base mechanism, the imaging unit comprises a housing arranged on the lens unit and an autofocus mechanism, a filtering mechanism and a processing mechanism stacked in sequence in the housing, the filtering mechanism and the processing mechanism are fixed and floatingly arranged on the inner side of the autofocus mechanism, and one end of the lens unit corresponding to the imaging side passes through the autofocus mechanism and is coaxially opposite to the filtering mechanism.

[0006] Furthermore, the base mechanism includes a base provided on the lens unit, a reinforcing steel sheet provided in the base, and a ball rolling in the reinforcing steel sheet; the aperture adjustment mechanism is provided in the base and is magnetically attracted to the reinforcing steel sheet, and the bottom of the aperture adjustment mechanism is in rolling engagement with the ball;

[0007] The base includes an inner ring wall plate and an outer ring wall plate arranged coaxially, and a bottom plate connecting the inner ring wall plate and the outer ring wall plate on a side of the base corresponding to the lens unit, the inner ring wall plate and the outer ring wall plate are spaced apart from each other to form a rotation space clamped between the outer circumferential surface of the inner ring wall plate and the inner circumferential surface of the outer ring wall plate, a plurality of positioning bosses protruding into the rotation space are circumferentially arranged on one side of the bottom plate corresponding to the rotation space, the reinforcing steel sheet is arranged in the rotation space and positioned on the positioning boss, a first guide groove is circumferentially arranged on the reinforcing steel sheet and is located next to the positioning boss, the circumferential length of the first guide groove is greater than the diameter of the ball, and the ball is rolled in the first guide groove.

[0008] Furthermore, the aperture adjustment mechanism includes a rotor assembly arranged in the base and magnetically engaged with the reinforcing steel sheet, and a stator assembly arranged on the rotor assembly and capable of rotating relative to the rotor assembly; the stator assembly is provided with a light-through hole located on the light incident side and coaxial with the optical axis, the aperture size of the light-through hole is adjustable and the light-through hole is collinear with the rotation axis of the rotor assembly.

[0009] Furthermore, the rotor assembly includes a rotor seat rotatably disposed within the base, a flexible circuit board laminated on the reinforcing steel sheet, and a drive module electrically connected to the flexible circuit board and driving the rotating seat to rotate, the drive module being disposed corresponding to the positioning boss, a rolling groove being disposed at the bottom of the rotor seat at a position corresponding to the first guide groove, and the top of the ball rollingly engages with the rolling groove;

[0010] The flexible circuit board is arranged between the rotor seat and the reinforcing steel sheet. A first mounting groove and a second mounting groove axially arranged above the first mounting groove and connected to the first mounting groove are further provided at the bottom of the rotor seat at a position corresponding to the driving module. The length of the first mounting groove along the circumferential direction is greater than the length of the second mounting groove along the circumferential direction.

[0011] The driving module includes a magnetic induction coil wound around the periphery of the positioning boss and accommodated in the first mounting groove, a magnet group stacked on the magnetic induction coil and fixed in the second mounting groove, and a magnetic steel sheet stacked on the magnet group and fixed in the second mounting groove. The magnet group is magnetically attracted to the reinforcing steel sheet, the magnetic induction coil is electrically connected to the flexible circuit board, and when the magnetic induction coil is energized, it can generate a magnetic field force with the magnet group to drive the rotor seat to rotate.

[0012] Furthermore, the stator assembly includes a stator seat rotatably engaged with the rotor seat, an aperture structure rotatably connected to the rotor seat and slidably engaged with the stator seat, and a cover plate covering the aperture structure, the light-through hole is arranged on the aperture structure, and the stator seat and the cover plate are respectively provided with a first through hole and a second through hole coaxial with the light-through hole.

[0013] Furthermore, the aperture structure includes a plurality of apertures circumferentially arranged around the first through hole, and the inner ends of the plurality of apertures surround the light-through hole; the outer ends of the apertures are rotatably connected to the rotor seat and slidably connected to the corresponding positions of the stator seat, and when the rotor seat rotates, the outer ends of the apertures are driven to move axially, and the apertures rotate relative to the rotor seat and slide relative to the stator seat, thereby changing the aperture of the light-through hole.

[0014] Furthermore, the housing has a hollow assembly space, and the processing mechanism, the filtering mechanism and the autofocus mechanism are stacked in sequence from bottom to top in the focusing mechanism;

[0015] The autofocus mechanism includes an upper spring disposed in the assembly space, a plurality of autofocus magnets disposed at the bottom of the upper spring, and an autofocus coil wound outside the filter mechanism and corresponding to the inner side of the autofocus magnets, wherein the plurality of autofocus magnets are disposed around the periphery of the upper spring;

[0016] A floating gap is provided between the upper surface of the upper spring piece and the upper side wall of the assembly space, and the top of the filter mechanism is in elastic contact with the bottom of the upper spring piece.

[0017] Furthermore, a third through hole is formed coaxially with the optical axis on the top of the housing and communicates with the assembly space. A relief groove is provided on the upper spring plate and extends along the optical axis. The lens unit can sequentially pass through the third through hole and the relief groove to face the filter mechanism.

[0018] The filter mechanism includes a filter holder elastically contacting the bottom of the upper spring and a filter mounted on the filter holder, wherein the filter holder is formed with an assembly hole coaxial with the optical axis, and the filter is mounted in the assembly hole;

[0019] The filter bracket is located on the inner side of the autofocus magnet, and the filter bracket includes a main frame, a first annular frame formed by extending upward from the upper surface of the main frame and along the optical axis, and a second annular frame formed by extending downward from the lower surface of the main board and along the optical axis. The assembly hole is formed on the main frame, and a support platform extending outward from the periphery of the main frame is integrally provided, which exceeds the outer circumferential surface of the first annular frame. A clamping block extending outward from one end of the first annular frame away from the main frame is spaced opposite to the upper surface of the support platform. The autofocus coil is wound outside the first annular frame and is correspondingly clamped between the upper surface of the support platform and the lower surface of the clamping block; the bottom of the second annular frame is supported on the processing mechanism.

[0020] Furthermore, the processing mechanism includes a photoelectric sensor, a hard circuit board and an elastic circuit board stacked in sequence on the lower side of the filter bracket, the elastic circuit board is elastically connected to the lower side wall of the assembly space, the hard circuit board is arranged at the bottom of the filter bracket and the photoelectric sensor is arranged at a position on the hard circuit board corresponding to the filter, and the photoelectric sensor, hard circuit board and elastic circuit board are electrically connected.

[0021] To achieve the above-mentioned object, another technical solution of the present invention provides an electronic device, comprising the camera module with variable aperture as described above.

[0022] The present invention provides a variable aperture unit on the lens unit. The outer end of the aperture can be driven to move circumferentially by the rotation of the rotor seat, thereby causing the outer end of the aperture to rotate relative to the rotor seat and slide on the stator seat, thereby changing the aperture size of the light hole formed by the inner end of the aperture, realizing the change of the aperture size, and adjusting the amount of light entering the lens unit, so that the camera module can adapt to shooting environments with different brightness, thereby improving the shooting effect of the camera module.

[0023] At the same time, the variable aperture unit and the imaging unit are both fixed to the lens unit. By floatingly arranging a filter mechanism in the outer shell, when the autofocus coil is energized, a magnetic field will be generated with the autofocus magnet, thereby generating a magnetic field force between the autofocus magnet and the autofocus coil. Since the autofocus magnet is fixed on the outer shell and / or the upper spring and the autofocus coil is wound on the filter bracket, under the action of the magnetic field force, the autofocus coil moves up and down relative to the autofocus magnet, thereby driving the entire filter mechanism to move up and down, thereby changing the axial distance between the photoelectric sensor and the lens unit to achieve autofocus; and, during the autofocus process, the lens unit and the variable aperture unit are fixed, and only the filter unit and the photoelectric sensor need to be pushed, thereby reducing the thrust required by the camera module during the autofocus process, which is conducive to the integration of the variable aperture unit and the lens unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a structural diagram of a camera module with variable aperture according to an embodiment of the present invention.

[0025] Figure 2 for Figure 1 Exploded diagram.

[0026] Figure 3 for Figure 1 Internal structure diagram.

[0027] Figure 4 This is an exploded view of the variable aperture unit.

[0028] Figure 5 Schematic diagram of the structure of the base mechanism.

[0029] Figure 6 This is the assembly drawing of the rotor assembly and the stator assembly (without the cover plate).

[0030] Figure 7 This is a schematic diagram of the structure of the rotor seat.

[0031] Figure 8 This is another structural schematic diagram of the rotor seat.

[0032] Figure 9 This is the assembly drawing of the drive module, flexible circuit board, reinforcing steel sheet, ball bearing and base.

[0033] Figure 10 Schematic diagram of the structure of the stator seat.

[0034] Figure 11 This is an exploded view of the lens unit.

[0035] Figure 12 This is an exploded view of the imaging unit.

[0036] Figure 13 Schematic diagram of the structure of the upper shell.

[0037] Figure 14 Schematic diagram of the structure of the filter bracket.

[0038] Figure 15 Assembly diagram of the filter holder, filter, and autofocus coil.

[0039] Figure 16 Schematic diagram of the structure of the flexible circuit board.

[0040] The accompanying drawings in this specification are numeraled as follows:

[0041] Variable aperture unit 10, light hole 10a;

[0042] Base mechanism 20, base 21, rotation space 21a, first notch 21b, inner ring wall plate 211, outer ring wall plate 212, bottom plate 213, positioning boss 214, reinforcing steel sheet 22, first positioning groove 22a, first guide groove 22b, ball bearing 23;

[0043] Aperture adjustment mechanism 30, rotor assembly 31, rotor seat 311, rolling groove 311a, first mounting groove 311b, second mounting groove 311c, mounting hole 311d, bridge 3111, sliding groove 3112, rotating shaft 3113, flexible circuit board 312, second positioning groove 312a, second guide groove 312b, driving module 313, magnetic induction coil 3131, magnet group 3132, first magnetic pole 3132a, second magnetic pole 3132b, magnetic attraction Steel sheet 3133, first connecting circuit board 314, first connector 315, stator assembly 32, stator base 321, first through hole 321a, overlapping edge 3211, sliding block 3212, sliding shaft 3213, aperture structure 322, aperture 322a, first portion 3221, arc-shaped notch 3221a, second portion 3222, strip-shaped slide groove 3222a, third portion 3223, shaft hole 3223a, cover plate 323, second through hole 323a;

[0044] Lens unit 40, lens holder 41, fourth through hole 41a, fixing thread 411, lens 42, fixing flange 421;

[0045] Imaging unit 50, housing 51, assembly space 51a, third through hole 51b, floating gap 51c, second notch 51d, lower housing 511, upper housing 512, mounting platform 513;

[0046] Autofocus mechanism 60, upper spring 61, avoidance groove 61a, autofocus magnet 62, autofocus coil 63;

[0047] Filter mechanism 70, filter bracket 71, assembly hole 71a, winding space 71b, main frame 711, first annular frame 712, second annular frame 713, support platform 714, clamping block 715, filter 72;

[0048] Processing mechanism 80 , photoelectric sensor 81 , hard circuit board 82 , elastic circuit board 83 , supporting portion 831 , fixing portion 832 , elastic portion 833 , electronic component 84 , second connection circuit board 85 , and second connector 86 . DETAILED DESCRIPTION

[0049] The following is further described in detail through specific implementation methods:

[0050] Example

[0051] Please refer to Figure 1 、 Figure 2 and Figure 3 The variable aperture camera module of the present invention includes a variable aperture unit 10, a lens unit 40, and an imaging unit 50, which are sequentially arranged along the optical axis. According to the imaging principle, the lens unit 40 has a light incident side and an imaging side. The variable aperture unit 10 is arranged on the light incident side of the lens unit 40 along the optical axis to adjust the amount of light entering the lens unit 40. The imaging unit 50 is arranged on the imaging side of the lens unit 40 along the optical axis to sense the light refracted by the lens unit 40 and form an image. In this embodiment, Figure 1 Taking the direction shown as an example, the light incident side is located at the upper side or top of the lens unit 40 , and the imaging side is located at the lower side or bottom of the lens unit 40 .

[0052] Please refer to Figure 4 The variable aperture unit 10 includes a base mechanism 20 disposed on the lens unit 40 and an aperture adjustment mechanism 30 disposed on the base mechanism 20. The variable aperture unit 10 has a light hole 10a coaxially arranged with the optical axis, through which light enters the lens unit 40. The bottom of the base mechanism 20 is fixed to the top of the lens unit 40 with adhesive, used to fix the entire variable aperture unit 10 to the lens unit 40. The aperture adjustment mechanism 30 is assembled on the top of the base mechanism 20 and is used to adjust the size of the light hole 10a, thereby adjusting the amount of light entering the lens unit 40, enabling the camera module to freely switch between large and small apertures, thereby adapting to shooting environments with different brightness and improving shooting effects.

[0053] Please refer to Figure 5The base mechanism 20 includes a base 21, a reinforcing steel sheet 22, and a ball bearing 23. The bottom of the base 21 is mounted on the lens unit 40 to connect the entire variable aperture unit 10 to the lens unit 40. A downwardly recessed rotation space 21a is provided on the upper side of the base 21. The reinforcing steel sheet 22 is positioned within the rotation space 21a and mates with a corresponding position on the base 21. The aperture adjustment mechanism 30 is positioned within the base 21 and magnetically engages with the reinforcing steel sheet 22 to secure a portion of the aperture adjustment mechanism 30. Another portion of the aperture adjustment mechanism 30 is secured to the edge of the base 21 to enclose the internal space between the base mechanism 20 and the aperture adjustment mechanism 30. The ball 23 is rollingly arranged in the reinforcing steel sheet 22, and the bottom of the ball 23 extends downwardly beyond the lower surface of the reinforcing steel sheet 22 and rolls with the corresponding position of the base 21 (specifically, the bottom wall of the rotating space 21a), and the top of the ball 23 extends upwardly beyond the upper surface of the reinforcing steel sheet 22 and rolls with the bottom of the aperture adjustment mechanism 30, so as to facilitate the rotation of the aperture adjustment mechanism 30 and thereby adjust the aperture size. It is understandable that in some other embodiments, when the ball 23 is arranged, its top and bottom do not need to extend beyond the upper and lower surfaces of the reinforcing steel sheet 22. The top and bottom of the ball 23 can also be flush with the upper and lower surfaces of the reinforcing steel sheet 22. It is only necessary for the top and bottom of the ball 23 to be in rolling contact with the bottom of the aperture adjustment mechanism 30 and the corresponding position of the base 21. Since the function of the ball 23 is to enable the aperture adjustment mechanism 30 to rotate smoothly, in some other embodiments, the ball 23 can also be arranged so that only the top of the ball 23 is in rolling contact with the bottom of the aperture adjustment mechanism 30.

[0054] In this embodiment, the bottom of the base 21 is fixed to the top of the lens unit 40 by applying glue. Specifically, a circle of glue is evenly applied to the bottom of the bottom plate 213 to fix and seal the gap between the base 21 and the lens unit 40. It is understood that in other embodiments, the base 21 and the lens unit 40 can also be fixed by other methods (such as snap-fitting, etc.), and then a small amount of glue is applied between the gap to seal the gap between the two to achieve the fixation between the variable aperture unit 10 and the lens unit 40, thereby further reducing the weight of the variable aperture unit 10.

[0055] The base 21 is annular in structure, with the rotation space 21a formed as a recessed portion of the top surface of the base 21. The base 21 comprises a coaxially arranged inner and outer wall panels 211, 212, and a bottom plate 213 connecting the inner and outer wall panels 211, 212 on the side of the base 21 corresponding to the lens unit 40. The bottom plate 213 is integrally formed with the bottoms of the inner and outer wall panels 211, 212. The top of the lens unit 40 can extend into the space enclosed by the inner circumference of the inner wall panel 211 to receive incident light. Both the inner and outer wall panels 211, 212 are annular in shape. The inner and outer wall panels 211, 212, are spaced apart from each other and, together with the top surface of the bottom plate 213, form the rotation space 21a. The rotation space 21a is sandwiched between the outer circumferences of the inner and outer wall panels 211, 212, and has an upward opening.

[0056] A plurality of positioning bosses 214 protruding into the rotation space 21a are circumferentially arranged on one side of the bottom plate 213 corresponding to the rotation space 21a (i.e., the upper side of the bottom plate 213), and a first positioning groove 22a is formed on the reinforcing steel sheet 22 at a position corresponding to the positioning boss 214, which passes through the reinforcing steel sheet 22 from top to bottom. The first positioning groove 22a is adapted to the size of the positioning boss 214. When the reinforcing steel sheet 22 is set in the rotation space 21a, it is positioned on the positioning boss 214 through the first positioning groove 22a. In this embodiment, the positioning boss 214 is an arc-shaped strip structure, and three positioning bosses 214 are preferably arranged along the circumference. The long side of the positioning boss 214 of the strip structure extends along the circumference to stably position the reinforcing steel sheet 22; it is understandable that in some other embodiments, the structure of the positioning boss 214 can also be a truncated cone, cylindrical or cubic structure, and its number can also be adaptively adjusted according to needs, such as setting two, four, etc.

[0057] A first guide groove 22 b is circumferentially provided on the reinforcing steel sheet 22 and is located beside the positioning boss 214 . The balls 23 are rollingly arranged in the first guide groove 22 b . In this embodiment, the circumferential length of the first guide groove 22b is greater than the diameter of the ball 23. In specific implementation, when one ball 23 is provided in a first guide groove 22b, the length of the first guide groove 22b is at least greater than the diameter of one ball 23. When multiple balls 23 are provided in a first guide groove 22b, the length of the first guide groove 22b is at least greater than the sum of the diameters of the multiple balls 23. The specific difference between the length of the first guide groove 22b and the diameter of the ball 23 (i.e., the rolling range or length of the ball 23 in the first guide groove 22b) can be determined according to the adjustment range of the aperture; the width of the first guide groove 22b is less than or equal to the diameter of the ball 23, so that when the ball 23 slides in the first guide groove 22b, its motion trajectory is a circular arc with the same radius, and the motion direction is unchanged and unique, thereby increasing the smoothness of the top sliding of the aperture adjustment mechanism 30.

[0058] Please refer to Figure 6 、 Figure 7 、 Figure 8 and Figure 9 The aperture adjustment mechanism 30 includes a rotor assembly 31 disposed in the base 21 and a stator assembly 32 disposed on the rotor assembly 31 and capable of rotating relative to the rotor assembly 31 . The bottom of the rotor assembly 31 is rotatably arranged in the rotating space 21a and is in rolling contact with the top of the ball 23. At the same time, the bottom of the rotor assembly 31 can also be magnetically matched with the reinforcing steel sheet 22 to adsorb the rotor assembly 31 in the rotating space 21a. Such an arrangement can, firstly, relatively fix the axial position of the rotor assembly 31 without setting an additional fixing structure, thereby simplifying the overall structure of the variable aperture unit 10; secondly, when the rotor assembly 31 rotates in the rotating space 21a, it only undergoes relative displacement in the circumferential direction with the base 21 while the axial position remains unchanged. Moreover, due to the arrangement of the ball 23, while the rotor assembly 31 rotates smoothly, the friction between the reinforcing steel sheet 22 and the bottom of the rotor assembly 31 increases due to the presence of magnetic force, thereby controlling the rolling effect brought by the ball 23, and avoiding the existence of rolling inertia that causes the rotor assembly 31 to rotate too fast or exceed the set range, thereby improving the rotation stability of the rotor assembly 31. In this embodiment, the light-through hole 10a is arranged on the stator assembly 32 along the optical axis direction, the light-through hole 10a is collinear with the axis of the rotating shaft of the rotor assembly 31, and the aperture size of the light-through hole 10a is adjusted by the rotational cooperation of the rotor assembly 31 relative to the stator assembly 32.

[0059] The rotor assembly 31 includes a rotor seat 311 rotatably mounted within the base 21, a flexible circuit board 312 laminated on the reinforcing steel sheet 22, and a drive module 313 electrically connected to the flexible circuit board 312 to drive the rotation of the rotor seat. The flexible circuit board 312 is positioned between the bottom of the rotor seat 311 and the top surface of the reinforcing steel sheet 22. In this embodiment, the bottom of the flexible circuit board 312 is glued to the reinforcing steel sheet 22. The flexible circuit board 312 also has second positioning grooves 312a and second guide grooves 312b at locations corresponding to the first positioning grooves 22a and first guide grooves 22b of the reinforcing steel sheet 22, respectively. The second positioning groove 312a is positioned on the positioning boss 214, and the second guide groove 312b corresponds to the first guide groove 22b, allowing the top of the ball 23 to pass through and roll against the bottom of the rotor seat 311. The reinforcing steel sheet 22 can increase the strength of the flexible circuit board 312, so that the bottom of the rotor seat 311 can be supported on the flexible circuit board 312. At the same time, the reinforcing steel sheet 22 can also provide an adsorption carrier for the driving module 313, so that the driving module 313 can be magnetically engaged with the reinforcing steel sheet 22 when installed in the rotor seat 311.

[0060] The bottom of the rotor seat 311 is recessed in a direction away from the first guide groove 22b and the second guide groove 312b at a position corresponding to the first guide groove 22b and the second guide groove 312b (i.e., the lower surface of the rotor seat 311 is recessed upward) to form a rolling groove 311a, and the top of the ball 23 can extend into the rolling groove 311a and roll in cooperation with the groove wall and / or groove bottom of the rolling groove 311a. The bottom of the rotor seat 311 is provided with a first mounting groove 311b and a second mounting groove 311c which are recessed in a direction away from the positioning boss 214 at a position corresponding to the positioning boss 214. The circumferential length of the first mounting groove 311b is greater than the circumferential length of the second mounting groove 311c. The first mounting groove 311b is formed by the upward recess of the lower surface of the rotor seat 311, and the second mounting groove 311c is formed by the upward recess of the bottom of the first mounting groove 311b. The first mounting groove 311b and the second mounting groove 311c are connected to form a groove body with a two-stage stepped structure. The driving module 313 is installed in the groove body, and the driving module 313 is arranged in a one-to-one correspondence with the positioning boss 214. The bottom of the driving module 313 is positioned and matched with the positioning boss 214 and is electrically connected to the flexible circuit board 312.

[0061] The driving module 313 includes a magnetic induction coil 3131 wound around the periphery of the positioning boss 214 and accommodated in the first mounting groove 311b, a magnet group 3132 stacked on the magnetic induction coil 3131 and fixed in the second mounting groove 311c, and a magnetic steel sheet 3133 stacked on the magnet group 3132 and fixed in the second mounting groove 311c. The magnetic induction coil 3131 is electrically connected to the flexible circuit board 312. The flexible circuit board 312 can energize the magnetic induction coil 3131, so that the magnetic induction coil 3131 and the magnet group 3132 generate a magnetic field force to drive the rotor base 311 to rotate. The magnet group 3132 is magnetic, and its magnetic force can attract the reinforcing steel sheet 22 through the magnetic induction coil 3131 disposed thereunder. Simultaneously, the magnetic steel sheet 3133 secured within the second mounting slot 311c can attract the magnet group 3132 from above, thereby securing the axial position of the magnet group 3132. In this embodiment, the magnetic induction coil 3131, magnet group 3132, and magnetic steel sheet 3133 are stacked within the first mounting slot 311b and the second mounting slot 311c. This reduces the radial and axial dimensions of the entire drive module 313, thereby reducing the size of the rotating base and / or base 21 and the overall weight of the variable aperture unit 10, thereby facilitating a more compact and lightweight camera module.

[0062] The magnet group 3132 includes a first magnetic pole 3132a and a second magnetic pole 3132b which are radially arranged in parallel on the lower side of the magnetic steel sheet 3133 and located on the magnetic induction coil 3131. The first magnetic pole 3132a and the second magnetic pole 3132b have different magnetic properties. For example, when the first magnetic pole 3132a is the N pole, the second magnetic pole 3132b is the S pole, and vice versa. In this embodiment, the first magnetic pole 3132a and the second magnetic pole 3132b are arranged one-to-one and in parallel, which can further reduce the axial size of the driving module 313, thereby reducing the height of the variable aperture unit 10.

[0063] In this embodiment, the circumferential length of the magnet group 3132 matches the circumferential length of the second mounting slot 311c. The circumferential length of the wound magnetic induction coil 3131 is less than the circumferential length of the first mounting slot 311b. This allows for relative displacement between the magnetic induction coil 3131 and the rotor base 311, thereby enabling rotation of the rotor base 311. Specifically, when the rotor base 311 rotates, the first mounting slot 311b rotates relative to the magnetic induction coil 3131 and the positioning boss 214, and can be limited by the end walls of the first mounting slot 311b in clockwise and counterclockwise rotation, respectively, to limit the opening and closing size of the light hole 10a. In this embodiment, since multiple sets of positioning bosses 214, drive modules 313 and first mounting slots 311b are provided, when the rotor seat 311 rotates, the ends of the magnetic induction coils 3131 collide and limit with the two end walls of the first mounting slot 311b. Each magnetic induction coil 3131 can withstand a portion of the impact force, thereby dispersing the impact force to reduce the impact wear of the two end walls of the first mounting slot 311b on the magnetic induction coils 3131, thereby extending the service life of the drive module 313.

[0064] In a specific implementation of this embodiment, current is supplied to the magnetic induction coil 3131 via the flexible circuit board 312, causing the magnetic induction coil 3131 and the magnet group 3132 to generate a magnetic field force, thereby causing the magnet group 3132 to move circumferentially relative to the magnetic induction coil 3131 and push the slot wall of the second mounting slot 311c, thereby driving the rotor base 311 to rotate as a whole. Specifically, when the flexible circuit board 312 controls the current in the magnetic induction coil 3131 to flow from the positive pole to the negative pole, a magnetic force is generated to form a magnetic field with the magnet group 3132, thereby causing the magnet group 3132 to push the wall of the second mounting slot 311c, causing the rotor base 311 to rotate clockwise (or counterclockwise, the specific direction is related to the winding direction of the magnetic induction coil 3131 and the inner and outer positions of the first magnetic pole 3132a and the second magnetic pole 3132b in the magnet group 3132, which can be determined according to the prior art and is not described in detail in this embodiment). When the flexible circuit board 312 controls the current in the magnetic induction coil 3131 to flow from the negative pole to the positive pole, an opposite magnetic force is generated to form a magnetic field with the magnet group 3132, causing the magnet group 3132 to push the wall of the second mounting slot 311c, causing the rotor base 311 to rotate in the opposite direction counterclockwise (or clockwise), thereby driving the rotation of the rotor base 311 and achieving the switching of the rotation direction of the rotor base 311.

[0065] As a preferred embodiment of this embodiment, a first notch 21b is formed on the side wall of the base 21, which is connected to the rotation space 21a. The rotor assembly 31 also includes a first connecting circuit board 314 that integrally extends outward from the rotation space 21a at a position corresponding to the first notch 21b of the flexible circuit board 312, and a first connector 315 electrically connected to the first connecting circuit board 314. The first connector 315 is used to connect to an external circuit to power the drive module 313 and provide control signals to the coil (i.e., provide current signals in different directions). Preferably, the gap between the first notch 21b and the first connecting circuit board 314 is sealed with waterproof glue to seal the internal space of the aperture adjustment mechanism 30 to prevent water vapor, dust, etc. from entering. In this embodiment, the first connecting circuit board 314 is preferably a flexible circuit board. Of course, in some other embodiments, the first connecting circuit board 314 can also be implemented by a rigid circuit board or a circuit board that combines rigidity and flexibility.

[0066] In this embodiment, the rotor seat 311 is annular in structure as a whole. A mounting hole 311d coaxial with the optical axis is provided in the middle of the rotor seat 311. The stator assembly 32 is installed in the mounting hole 311d and rotates with the upper surface of the rotor seat 311. When the rotor seat 311 rotates, the inner wall surface of the rotor seat 311 and the stator assembly 32 rotate relative to each other, thereby adjusting the size of the light hole 10a.

[0067] Please refer to the return Figure 2 and Figure 6 The stator assembly 32 includes a stator seat 321 that rotatably engages with the rotor seat 311, an aperture structure 322 that is rotatably connected to the rotor seat 311 and slidably engages with the stator seat 321, and a cover plate 323 that covers the aperture structure 322. The aperture structure 322 is horizontally mounted on the stator seat 321 and the rotor seat 311, allowing the aperture structure 322 to rotate horizontally on corresponding planes to achieve stable adjustment of the aperture of the light hole 10a. The light hole 10a is provided on the aperture structure 322. When the rotor seat 311 rotates, it drives the aperture structure 322 to rotate relative to the rotor seat 311 and slide relative to the stator seat 321, thereby changing the size of the light hole 10a. The stator seat 321 and the cover plate 323 are respectively provided with a first through hole 321a and a second through hole 323a coaxial with the light hole 10a. The top of the lens 42 assembly can extend into the first through hole 321a and be opposite to the light hole 10a to receive incident light; the aperture of the second through hole 323a is greater than or equal to the aperture of the light hole 10a when it is adjusted to the maximum, so as to avoid the cover plate 323 blocking the light hole 10a.

[0068] Please refer to Figure 10The stator seat 321 is arranged in the mounting hole 311d. Preferably, when the stator seat 321 is assembled in place, the upper surface of the stator seat 321 is coplanar with the upper surface of the rotor seat 311. Specifically, the stator seat 321 is annular in structure as a whole. The outer edge of the upper side of the stator seat 321 extends radially outward to form a lap edge 3211. The inner edge of the upper side of the rotor seat 311 is formed with a lap platform 3111 that is axially recessed downward at a position corresponding to the lap edge 3211 to support the lap edge 3211. The outer wall surface of the stator seat 321 extends radially outward to form a sliding block 3111 that can protrude to the inner wall surface of the rotor seat 311. 212, a sliding groove 3112 is radially recessed on the inner wall surface of the rotor seat 311 at a position corresponding to the sliding block 3212, and the sliding groove 3112 is connected to the upper surface of the overlapping platform 3111, and the circumferential length of the sliding groove 3112 is greater than the circumferential length of the sliding block 3212, so that the stator seat 321 can be assembled into the rotor seat 311 from top to bottom, and after being assembled into place, the sliding block 3212 can be slidably assembled in the sliding groove 3112 along the circumferential direction, and the overlapping edge 3211 overlaps the overlapping platform 3111.

[0069] The upper surface of the stator seat 321 is provided with multiple sliding shafts 3213 evenly arranged along the circumference, and the upper surface of the rotor seat 311 is provided with rotating shafts 3113 corresponding to the sliding shafts 3213 along the circumference. The aperture structure 322 is rotatably set on the rotating shaft 3113 and slidably cooperates with the sliding shaft 3213 to achieve adjustment of the aperture of the light hole 10a.

[0070] Please refer back to Figure 6The aperture structure 322 includes a plurality of apertures 322a arranged circumferentially around the first through hole 321a. The number of apertures 322a corresponds one-to-one with the number of sliding shafts 3213 and rotating shafts 3113. The inner ends of the plurality of apertures 322a surround and form the light-through hole 10a. The outer ends of the apertures 322a are rotatably connected to the rotor seat 311 and slidably connected to corresponding positions on the stator seat 321. When the rotor seat 311 rotates, the outer ends of the apertures 322a move axially. The apertures 322a rotate relative to the rotor seat 311 and slide relative to the stator seat 321, thereby changing the aperture diameter of the light-through hole 10a. In this embodiment, the aperture structure 322 is provided with six apertures 322a, and the outer ends of the six apertures 322a are correspondingly rotatably set on the rotating shaft 3113 and slidably set on the sliding shaft 3213. When the rotor seat 311 rotates clockwise, the outer end of the aperture 322a rotates synchronously clockwise relative to the rotating shaft 3113, so that the inner end of the aperture 322a is retracted inward to reduce the aperture of the light hole 10a, and when the rotor seat 311 rotates counterclockwise, the outer end of the aperture 322a rotates synchronously counterclockwise relative to the rotating shaft 3113, so that the inner end of the aperture 322a is opened outward to increase the aperture of the light hole 10a, thereby realizing the adjustment of the amount of light entering.

[0071] In this embodiment, the aperture 322a is a long strip structure, and each aperture 322a includes a first part 3221, a second part 3222 and a third part 3223 that are integrally formed and connected in sequence. The end of the first part 3221 away from the second part 3222 is the inner end of the aperture 322a, and the end of the third part 3223 away from the second part 3222 is the outer end of the aperture 322a. An arc-shaped notch 3221a is formed at one end of the first portion 3221 away from the second portion 3222. In the six apertures 322a of this embodiment, the first portions 3221 of two adjacent apertures 322a are arranged to overlap each other, that is, the first portion 3221 of the odd-numbered apertures 322a starting from any aperture 322a is arranged at the bottom, and the first sub-portion of the even-numbered apertures 322a overlaps on the first portions 3221 of the two adjacent cardinal-numbered apertures 322a, so that the arc-shaped notches 3221a on each first portion 3221 can be projected on a plane perpendicular to the optical axis to enclose the light hole 10a; a strip groove 3222a is provided on the second portion 3222 at a position corresponding to the sliding shaft 3213, and the length of the strip groove 3222a is at least greater than the diameter of the sliding shaft 3213. The width of the strip slide groove 3222a is adapted to the diameter of the sliding shaft 3213, so that the sliding shaft 3213 can be inserted into the strip slide groove 3222a from bottom to top; an axial hole 3223a adapted to the diameter of the rotating shaft 3113 is provided on the third part 3223 at a position corresponding to the rotating shaft 3113, and the rotating shaft 3113 is inserted into the axial hole 3223a from bottom to top. In this way, when the rotor seat 311 drives the sliding shaft 3213 to rotate, the sliding shaft 3213 can push the groove wall of the sliding groove 3112. Since the diaphragm 322a is set on the rotating shaft 3113 through the axial hole 3223a, when the sliding shaft 3213 pushes the sliding groove 3112, the diaphragm 322a will rotate around the rotating shaft 3113 under the thrust of the sliding shaft 3213, thereby driving the first part 3221 to overlap more or less to achieve the purpose of adjusting the light hole 10a.

[0072] Please continue to refer to Figure 11The lens unit 40 includes a lens mount 41 and a lens 42 disposed within the lens mount 41. The top of the lens mount 41 is fixed to the bottom of the variable aperture unit 10 (specifically, the bottom of the base 21), and the bottom of the lens mount 41 is fixed to the top of the imaging unit 50. In this embodiment, the top of the lens unit 40 and the bottom of the base 21 are fixed using adhesive, and the bottom of the lens unit 40 and the imaging unit 50 are fixed using an optical active alignment process. A fourth through hole 41a is formed in the lens mount 41 along the optical axis. A circle of fixing threads 411 are circumferentially provided on the inner circumference of the fourth through hole 41a. A circle of fixing flanges 421 are circumferentially provided on the outer circumference of the lens 42 at positions corresponding to the fixing threads 411, and are adapted to the fixing threads 411. The fixing flanges 421 cooperate with the fixing threads 411 to secure the lens 42 within the fourth through hole 41a. The top of the lens 42 extends upward beyond the upper surface of the lens holder 41 and extends into the stator holder 321 to correspond to the light hole 10a, and the bottom of the lens 42 extends downward beyond the lower surface of the lens holder 41 and extends into the imaging pixel to transmit the incident light to the imaging unit 50 for imaging.

[0073] Please refer to Figure 3 、 Figure 12 and Figure 13The imaging unit 50 includes a housing 51 disposed on the lens unit 40, and an autofocus mechanism 60, a filter mechanism 70, and a processing mechanism 80 stacked sequentially within the housing 51. Specifically, the housing 51 includes a lower shell 511 and an upper shell 512 covering the lower shell 511. The housing 51 has a hollow structure forming an assembly space 51a. The autofocus mechanism 60, the filter mechanism 70, and the processing mechanism 80 are stacked sequentially from top to bottom within the assembly space 51a. A third through hole 51b is formed along the optical axis at the top of the housing 51 (i.e., the top of the upper shell 512) and communicates with the assembly space 51a. The top of the upper shell 512 is fixed to the lens mount 41 of the lens unit 40. The imaging-side end of the lens 42 (i.e., the lens unit 40) passes downward through the third through hole 51b into the assembly space 51a and coaxially faces the filter mechanism 70, thereby transmitting incident light to the filter mechanism 70 for filtering. The filter mechanism 70 is floatingly mounted on the processing mechanism 80 and located inside the autofocus mechanism 60. When energized, the autofocus mechanism 60 generates a magnetic field to drive the filter mechanism 70 to move up and down axially toward or away from the corresponding end of the lens 42. Because the processing mechanism 80 is fixed below the filter mechanism 70, its floating movement also causes the processing mechanism 80 to float synchronously, thereby adjusting the focal length between the filter mechanism 70, the processing mechanism 80, and the lens 42, thereby achieving autofocus. With this arrangement, during autofocus, only the filter mechanism 70 and the processing mechanism 80 move, while the lens unit 40 and the iris unit 10 remain stationary. Therefore, the autofocus mechanism 60 only needs to drive the filter mechanism 70 throughout the entire process, which in turn drives the processing mechanism 80 to move synchronously. The weight of the filter mechanism 70 and / or the processing mechanism 80 is significantly lighter than the weight of the lens unit 40 and / or the iris unit 10, thereby achieving autofocus.

[0074] Furthermore, mounting platforms 513 are symmetrically positioned within the upper housing 512, corresponding to the upper sidewalls of the assembly space 51a. The top of the autofocus mechanism 60 is secured to the bottom of these mounting platforms. In this embodiment, the mounting platforms 513 are preferably positioned at the four corners of the upper sidewall of the assembly space 51a and are formed integrally with the upper sidewall of the assembly space 51a, projecting downwardly from the plane of the upper sidewall of the assembly space 51a. This creates a floating gap 51c between the upper sidewall of the assembly space 51a and the top of the autofocus mechanism 60, providing space for the filter mechanism 70 to float.

[0075] The autofocus mechanism 60 includes an upper spring 61 arranged in the assembly space 51a, a plurality of autofocus magnets 62 arranged at the bottom of the upper spring 61, and an autofocus coil 63 wound outside the filter mechanism 70 and corresponding to the inner side of the autofocus magnet 62. The top of the filter mechanism 70 is in elastic contact with the bottom of the upper spring 61.

[0076] The top of the upper spring piece 61 is fixed to the bottom of the mounting platform 513. The upper spring piece 61 is provided with an escape groove 61a which passes through the optical axis direction, so that the bottom of the lens 42 can pass through the escape groove 61a and face the filter mechanism 70. The floating gap 51c is provided between the upper surface of the upper spring piece 61 and the upper side wall of the assembly space 51a. The upper spring piece 61 is elastic and can contact the bottom of the upper spring piece 61 and push the upper spring piece upward when the filter mechanism 70 floats upward. The upper spring piece 61 can block the filter mechanism 70 during the upward movement of the filter mechanism 70 to prevent the filter mechanism 70 from moving upward excessively and coming into contact with the lens 42. At the same time, when the upper spring piece 61 is pushed by the filter mechanism 70, the force-bearing position bulges upward to obtain a rebound force. The rebound force can generate a certain resistance to the filter mechanism 70 during the upward movement of the filter mechanism 70, so as to control the upward speed of the filter mechanism 70 and avoid unstable focus caused by the movement of the filter mechanism 70.

[0077] A plurality of autofocus magnets 62 are disposed around the periphery of the upper spring 61 and are preferably fixed to the housing 51. During autofocusing, when the processing mechanism 80 provides a current flowing from the positive pole to the negative pole or from the negative pole to the positive pole to the autofocus coil 63, the autofocus coil 63 generates an electromagnetic force, which cooperates with the magnetic field of the autofocus magnets 62 disposed around the autofocus coil 63, thereby generating an interaction force between the autofocus coil 63 and the autofocus magnets 62. Since the position of the autofocus magnets 62 is fixed, the interaction force between the autofocus magnets 62 and the autofocus coil 63 pushes the autofocus coil 63 upward or downward. Since the autofocus coil 63 is wound around the floating filter mechanism 70, it drives the filter mechanism 70 to move upward or downward synchronously, thereby adjusting the relative axial distance between the filter mechanism 70 and the lens 42, achieving autofocusing.

[0078] Please continue to refer to Figure 14 and Figure 15The filter mechanism 70 includes a filter holder 71 that elastically contacts the bottom of the upper spring 61, and a filter 72 mounted on the filter holder 71. The filter holder 71 is formed with a mounting hole 71a coaxially along the optical axis. The filter 72 is mounted within the mounting hole 71a and coaxially opposes the bottom of the lens 42 to filter out stray light or unwanted light from the light transmitted through the lens 42. The filter holder 71 is located inside the autofocus magnet 62. The autofocus coil 63 is circumferentially wound around the filter holder 71. The top of the filter holder 71 elastically contacts the upper spring 61, and the bottom of the filter holder 71 is fixed to the processing mechanism 80. This allows the autofocus coil 63 to drive the filter holder 71 and the filter 72 to move synchronously when it moves up and down.

[0079] In this embodiment, the filter holder 71 comprises a main frame 711, a first annular frame 712 integrally extending upward from the upper surface of the main frame 711 along the optical axis, and a second annular frame 713 integrally extending downward from the lower surface of the main board along the optical axis. The main frame 711 is generally flat and disposed perpendicular to the optical axis. The mounting holes 71a are formed in the main frame 711 along the optical axis to horizontally support the filter 72. The first annular frame 712 is a generally annular structure, allowing the bottom of the lens 42 to extend between the inner circumference of the first annular frame 712 and face the filter 72. The second annular frame 713 is a generally annular structure, with its bottom supported on the processing mechanism 80. The inner circumference of the second annular frame 713 accommodates the corresponding structure of the processing mechanism 80.

[0080] In order to wind the autofocus coil 63, the outer periphery of the main frame 711 is integrally extended with a support platform 714 that exceeds the outer periphery of the first annular frame 712. The support platform 714 preferably surrounds the main frame 711 in a circle along the circumferential direction. The end of the first annular frame 712 away from the main frame 711 is integrally extended with a clamping block 715 that is spaced apart from the upper surface of the support platform 714. The clamping block 715 is preferably provided with a plurality of clamping blocks 715, and the plurality of clamping blocks 715 are preferably provided along the first annular frame 712. 12 are evenly spaced along the axis. Thus, a winding space 71b is formed on the outer circumference of the first annular frame 712, corresponding to the upper surface of the support platform 714 and the lower surface of the clamping block 715. The autofocus coil 63 can be wound within the winding space 71b, so that when the autofocus coil 63 moves upward, it can push the lower surface of the clamping block 715, or when the autofocus coil 63 moves downward, it can push the upper surface of the support platform 714, thereby synchronously driving the filter holder 71 to move. It is understood that in other embodiments, the support platform 714 can also be configured as a plurality of support blocks evenly spaced along the circumference, like the clamping block 715, or the clamping block 715 can also be configured as a clamping platform structure that surrounds the circumference, like the support platform 714, and so on.

[0081] The processing mechanism 80 includes a photoelectric sensor 81, a rigid circuit board 82, and a flexible circuit board 83, which are sequentially stacked on the lower side of the filter holder 71. The photoelectric sensor 81, rigid circuit board 82, and flexible circuit board 83 are electrically connected. The upper side of the rigid circuit board 82 is fixed to the bottom of the second annular frame 713 of the filter holder 71. The photoelectric sensor 81 is arranged on the side of the rigid circuit board 82 corresponding to the filter 72 and is accommodated in the inner circumference of the second annular frame 713 to receive light filtered by the filter 72, thereby achieving image processing of the object being photographed. It is understood that the processing mechanism 80 also includes other necessary electronic components 84 (such as resistors, capacitors, etc.) arranged on the circuit board and / or the flexible circuit board 83. These structures can be implemented using existing technologies and are not described in detail in this embodiment.

[0082] Please refer to Figure 16The elastic circuit board 83 is elastically connected to the lower side wall of the assembly space 51a, that is, elastically connected to the upper surface of the lower shell 511, so that the hard circuit board 82 and the photoelectric sensor 81 can float up and down synchronously with the filtering mechanism 70. Specifically, the elastic circuit board 83 includes a supporting portion 831 that supports the hard circuit board 82, a fixing portion 832 with a spacer ring arranged outside the supporting portion 831, and an elastic portion 833 that is arranged between the outer circumference of the supporting portion 831 and the inner circumference of the fixing portion 832 and connects the supporting portion 831 and the fixing portion 832. The elastic portion 833 includes a plurality of spring pieces that connect the outer circumference of the supporting portion 831 and the inner circumference of the fixing portion 832. The plurality of spring pieces are bent or wound between the outer circumference of the supporting portion 831 and the inner circumference of the fixing portion 832. The supporting portion 831 floats above the lower shell 511 and can move upward synchronously with the hard circuit board 82. The fixing portion 832 is fixed on the lower shell 511 to prevent the processing mechanism 80 from moving as a whole, thereby ensuring the stability of imaging.

[0083] As a preferred embodiment of this embodiment, a second notch 51d is formed on the sidewall of the housing 51, communicating with the assembly space 51a. The processing mechanism 80 also includes a second connecting circuit board 85 integrally extending outward from the assembly space 51a at a position on the elastic circuit board 83 corresponding to the second notch 51d, and a second connector 86 electrically connected to the second connecting circuit board 85. The second connector 86 is used to connect to an external circuit to power the processing mechanism 80, provide control signals to the autofocus coil 63 (also providing current signals of different directions), and transmit signals between the photosensor 81 and the external circuit. Preferably, the gap between the second notch 51d and the second connecting circuit board 85 is sealed with waterproof glue to seal the internal space of the imaging unit 50 and prevent the ingress of moisture, dust, etc. In this embodiment, the second connecting circuit board 85 is preferably a flexible circuit board. Of course, in other embodiments, the second connecting circuit board 85 can also be implemented as a rigid circuit board or a combination of rigid and flexible circuit boards.

[0084] During assembly of the present invention, for the assembly of the variable aperture unit 10, first, the flexible circuit board 312 is aligned with the first positioning groove 22a and the second positioning groove 312a and the first guide groove 22b and the second guide groove 312b on the reinforcing steel sheet 22, and then glued and fixed. Then, the first connecting circuit board 314 is fixed to the flexible circuit board 312 by soldering and the first connector 315 is welded to the first connecting circuit board 314. Then, the first connecting circuit board 314 is aligned with the first notch 21b, and the bonded flexible circuit board 312 and the reinforcing steel sheet 22 are respectively positioned and assembled with the positioning boss 214 in the base 21 through the second positioning groove 312a and the first positioning groove 22a, and the reinforcing steel sheet 22 is fixed by applying glue. The bottom of the first connecting circuit board 314 and the base 21 are connected, and the ball bearings 23 are installed in the first guide groove 22b and the second guide groove 312b. Next, the magnetic induction coil 3131 is wound around the four sides of the positioning boss 214. The magnetic steel sheet 3133 and the magnet group 3132 are sequentially installed into the second mounting groove 311c of the rotor base 311 from bottom to top and fixed. After that, the first mounting groove 311b of the rotor base 311 is aligned with the magnetic induction coil 3131 and the rotor base 311 is placed in the rotating space 21a. The rotor assembly 31 is fixed by the magnetic attraction between the magnet group 3132 and the reinforcing steel sheet 22. Finally, the stator base 321 is installed in the rotor base 311, and the aperture 322a is assembled. Then, the cover plate 323 is installed to seal the variable aperture unit 10, completing the assembly of the variable aperture unit 10.

[0085] For the assembly of the lens unit 40 , the lens 42 and the lens holder 41 are assembled by using a positioning height limiting fixture.

[0086] For the assembly of the imaging unit 50, first, the electronic components 84 and the photoelectric sensor 81 are fixed to the rigid circuit board 82 by the SMT process, and then the rigid circuit board 82 is fixed to the support portion 831 of the flexible circuit board 83 by the SMT process; then, the autofocus coil 63 is wound on the filter bracket 71, and the filter 72 is attached to the assembly hole 71a of the filter bracket 71. The bottom of the filter bracket 71 is fixed to the rigid circuit board 82 by means of adhesive, and the assembled parts are then assembled. The fixing portion 832 on the elastic circuit board 83 is assembled and fixed to the lower shell 511; then, the upper spring 61 is fixed to the bottom of the assembly table in the upper shell 512 by applying glue, and the autofocus magnet 62 is installed and fixed around the bottom of the upper spring 61; finally, the assembled upper shell 512 and the assembled lower shell 511 are fixed by applying glue on the sides, and then the second connecting circuit board 85 and the second connector 86 are welded and fixed on the elastic circuit board 83 to complete the assembly of the imaging unit 50.

[0087] After the variable aperture unit 10, the lens unit 40 and the imaging unit 50 are assembled respectively, the lens unit 40 and the imaging unit 50 are fixed through an optical automatic calibration process, and then the variable aperture unit 10 is fixed to the lens unit 40 by applying glue, completing the entire assembly process of the present invention.

[0088] As a preferred embodiment of the present invention, the present invention also provides an electronic device, which includes the camera module with variable aperture as described above. The electronic device can be a mobile phone, a tablet computer, a laptop computer, a smart watch, and other devices that have a camera function and can transmit data with the camera module with variable aperture.

Claims

1. A camera module with variable aperture, comprising a lens unit, characterized in that: The invention also includes a variable aperture unit arranged on the light incident side of the lens unit along the optical axis, and an imaging unit arranged on the imaging side of the lens unit along the optical axis; the variable aperture unit includes a base mechanism arranged on the lens unit and an aperture adjustment mechanism arranged on the base mechanism; the imaging unit includes a housing arranged on the lens unit, and an autofocus mechanism, a filter mechanism, and a processing mechanism stacked in sequence within the housing; the filter mechanism and the processing mechanism are fixed and floatingly arranged inside the autofocus mechanism; an end of the lens unit corresponding to the imaging side passes through the autofocus mechanism and is coaxially opposite to the filter mechanism; The base mechanism includes a base provided on the lens unit, a reinforcing steel sheet provided in the base, and a ball rolling in the reinforcing steel sheet; the aperture adjustment mechanism is provided in the base and is magnetically attracted to the reinforcing steel sheet, and the bottom of the aperture adjustment mechanism is in rolling engagement with the ball; The aperture adjustment mechanism includes a rotor assembly arranged in the base and magnetically engaged with the reinforcing steel sheet, and a stator assembly arranged on the rotor assembly and capable of rotating relative to the rotor assembly; the stator assembly is provided with a light-through hole located on the light incident side and coaxial with the optical axis, the aperture size of the light-through hole is adjustable, and the light-through hole is collinear with the rotation axis of the rotor assembly.

2. The camera module with variable aperture according to claim 1, wherein: The base includes an inner ring wall plate and an outer ring wall plate arranged coaxially, and a bottom plate connecting the inner ring wall plate and the outer ring wall plate on a side of the base corresponding to the lens unit, the inner ring wall plate and the outer ring wall plate are spaced apart from each other to form a rotation space clamped between the outer circumferential surface of the inner ring wall plate and the inner circumferential surface of the outer ring wall plate, a plurality of positioning bosses protruding into the rotation space are circumferentially arranged on one side of the bottom plate corresponding to the rotation space, the reinforcing steel sheet is arranged in the rotation space and positioned on the positioning boss, a first guide groove is circumferentially arranged on the reinforcing steel sheet and is located next to the positioning boss, the circumferential length of the first guide groove is greater than the diameter of the ball, and the ball is rolled in the first guide groove.

3. The camera module with variable aperture according to claim 2, wherein: The rotor assembly includes a rotor seat rotatably disposed within the base, a flexible circuit board stacked on the reinforcing steel sheet, and a drive module electrically connected to the flexible circuit board and driving the rotor seat to rotate. The drive module is disposed correspondingly to the positioning boss. A rolling groove is disposed at the bottom of the rotor seat at a position corresponding to the first guide groove, and the top of the ball rollingly engages with the rolling groove. The flexible circuit board is arranged between the rotor seat and the reinforcing steel sheet. A first mounting groove and a second mounting groove axially arranged above the first mounting groove and connected to the first mounting groove are further provided at the bottom of the rotor seat at a position corresponding to the driving module. The length of the first mounting groove along the circumferential direction is greater than the length of the second mounting groove along the circumferential direction. The driving module includes a magnetic induction coil wound around the periphery of the positioning boss and accommodated in the first mounting groove, a magnet group stacked on the magnetic induction coil and fixed in the second mounting groove, and a magnetic steel sheet stacked on the magnet group and fixed in the second mounting groove. The magnet group and the reinforcing steel sheet are magnetically engaged, the magnetic induction coil is electrically connected to the flexible circuit board, and when energized, the magnetic induction coil can generate a magnetic field force with the magnet group to drive the rotor seat to rotate; The magnet group includes a first magnetic pole and a second magnetic pole arranged radially and side by side on the lower side of the magnetic steel sheet and located on the magnetic induction coil. The first magnetic pole and the second magnetic pole have different magnetic properties. The first magnetic pole and the second magnetic pole correspond to each other one by one and are arranged side by side.

4. The camera module with variable aperture according to claim 3, wherein: The stator assembly includes a stator seat rotatably engaged with the rotor seat, an aperture structure rotatably connected to the rotor seat and slidably engaged with the stator seat, and a cover plate covered on the aperture structure, the light hole is provided on the aperture structure, and the stator seat and the cover plate are respectively provided with a first through hole and a second through hole coaxial with the light hole; The rotor seat is provided with a mounting hole coaxial with the optical axis, and the stator seat is arranged in the mounting hole; the upper surface of the stator seat is evenly provided with multiple sliding shafts along the circumference, and the upper surface of the rotor seat is provided with rotating shafts corresponding to the sliding shafts along the circumference, and the aperture structure is rotatably provided on the rotating shaft and slidably cooperates with the sliding shaft to achieve adjustment of the aperture of the light hole.

5. The camera module with variable aperture according to claim 4, characterized in that: The aperture structure includes a plurality of apertures circumferentially arranged around the first through hole, and the inner ends of the plurality of apertures surround the light-through hole; the outer ends of the apertures are rotatably connected to the rotor seat and slidably connected to corresponding positions on the stator seat, and when the rotor seat rotates, the outer ends of the apertures are driven to move axially, and the apertures rotate relative to the rotor seat and slide relative to the stator seat, thereby changing the aperture of the light-through hole; among the plurality of apertures, the outer end of each aperture is rotatably arranged on a corresponding rotating shaft and slidably arranged on a corresponding sliding shaft.

6. The camera module with variable aperture according to claim 1, wherein: The housing has a hollow assembly space, and the processing mechanism, the filter mechanism and the auto-focus mechanism are stacked in sequence from bottom to top in the focusing mechanism; The autofocus mechanism includes an upper spring disposed in the assembly space, a plurality of autofocus magnets disposed at the bottom of the upper spring, and an autofocus coil wound outside the filter mechanism and corresponding to the inner side of the autofocus magnets, wherein the plurality of autofocus magnets are disposed around the periphery of the upper spring; A floating gap is provided between the upper surface of the upper spring piece and the upper side wall of the assembly space, and the top of the filter mechanism is in elastic contact with the bottom of the upper spring piece.

7. The camera module with variable aperture according to claim 6, characterized in that: A third through hole is formed on the top of the housing coaxially along the optical axis and communicates with the assembly space. A relief groove is provided on the upper spring plate and extends along the optical axis. The lens unit can sequentially pass through the third through hole and the relief groove to face the filter mechanism. The filter mechanism includes a filter holder elastically contacting the bottom of the upper spring and a filter mounted on the filter holder, wherein the filter holder is formed with an assembly hole coaxial with the optical axis, and the filter is mounted in the assembly hole; The filter bracket is located on the inner side of the autofocus magnet, and the filter bracket includes a main frame, a first annular frame formed by extending upward from the upper surface of the main frame and along the optical axis, and a second annular frame formed by extending downward from the lower surface of the main frame and along the optical axis. The assembly hole is formed on the main frame, and a support platform extending outward from the periphery of the main frame is integrally extended, which exceeds the outer circumferential surface of the first annular frame. A clamping block is integrally extended outward from one end of the first annular frame away from the main frame and is spaced opposite to the upper surface of the support platform. The autofocus coil is wound outside the first annular frame and is correspondingly clamped between the upper surface of the support platform and the lower surface of the clamping block; the bottom of the second annular frame is supported on the processing mechanism.

8. The camera module with variable aperture according to claim 7, characterized in that: The processing mechanism includes a photoelectric sensor, a hard circuit board and an elastic circuit board stacked in sequence on the lower side of the filter bracket, the elastic circuit board is elastically connected to the lower side wall of the assembly space, the hard circuit board is arranged at the bottom of the filter bracket and the photoelectric sensor is arranged at a position on the hard circuit board corresponding to the filter, and the photoelectric sensor, hard circuit board and elastic circuit board are electrically connected.

9. An electronic device, characterized in that: The invention comprises a camera module with variable aperture as claimed in any one of claims 1 to 8.

Images