Variable aperture structure, camera module and electronic equipment

Abstract

The utility model discloses a variable aperture structure, camera module and electronic equipment, the variable aperture structure comprises a base, a flexible anti-dazzling screen and a driving assembly, the base is provided with a through hole, the flexible anti-dazzling screen is installed at the position of the through hole, the flexible anti-dazzling screen is provided with a light through hole, and the driving assembly is installed on the flexible anti-dazzling screen. The driving assembly is installed on the base and connected with the edge, close to the light through hole, of the flexible anti-dazzling screen. The driving assembly is used for driving the light through hole to expand. The flexible anti-dazzling screen is used as the aperture, the driving assembly is used for driving the flexible anti-dazzling screen to deform, so that the light through hole is expanded, and after the driving force of the driving assembly is cancelled, the flexible anti-dazzling screen is automatically restored, so that the light through hole is shrunk, the aperture can be adjusted through a simple structure, and the control mode is relatively simple.

Description

Technical Field

[0001] The utility model relates to the technical field of variable aperture, in particular to a variable aperture structure, a camera module and an electronic device. Background Art

[0002] The aperture, an essential component of a camera module, significantly improves the camera's photographic quality. Specifically, by adjusting the aperture size to control the amount of light passing through the lens, the camera module's depth of field can be controlled, and the background blur effect can be enhanced, thereby improving image quality. As electronic devices such as mobile phones and tablets become increasingly thinner, the camera modules installed in these devices need to be as small as possible to accommodate the thickness of the device.

[0003] Generally speaking, the imaging environment of a camera module is relatively complex. For example, on a sunny day with sufficient light outdoors, the camera module will obtain more light information about the subject when shooting, and the image quality of the picture will be improved. However, on a dark night or rainy day, the camera module will not obtain enough light information, resulting in insufficient light information about the subject, and the image quality of the picture will decrease accordingly. In order to effectively improve the imaging quality of the camera module in different shooting environments, that is, to avoid overexposure in bright light and to obtain clear images in low light conditions, a variable aperture device can be added to the camera module to adjust the amount of light entering the lens. However, directly applying the existing variable aperture device to the lens will significantly increase the size of the camera module, which is not in line with the current development trend of miniaturization of camera modules.

[0004] In recent years, major manufacturers have been pursuing smaller camera modules while simultaneously imposing stricter requirements on their image quality. Traditional camera modules feature a variable aperture. By adjusting the aperture size, the intensity of incident light can be adjusted, significantly improving image quality. However, traditional variable apertures utilize a voice coil motor to drive blades to adjust the aperture size. This traditional variable aperture is relatively complex in both structure and control. Utility Model Content

[0005] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a variable aperture structure, a camera module and an electronic device to solve the problem that the variable aperture in the prior art is relatively complex in structure and control method.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] The utility model provides a variable aperture structure, including a base, a flexible light-shielding sheet and a driving assembly, wherein the base is provided with a through hole, the flexible light-shielding sheet is installed at the through hole, the flexible light-shielding sheet is provided with a light-through hole, the driving assembly is installed on the base and connected to the flexible light-shielding sheet near the edge of the light-through hole, and the driving assembly is used to drive the light-through hole to expand.

[0008] Furthermore, the driving assembly includes a driver, multiple driving ropes and a fixed pulley assembly, the multiple driving ropes are connected to the edge of the flexible light-shielding sheet near the light-through hole from multiple radial directions of the light-through hole, the ends of the multiple driving ropes away from the light-through hole are connected to the driver through the fixed pulley assembly, and the driver drives the light-through hole to expand through the multiple driving ropes.

[0009] Further, the plurality of driving ropes include a first driving rope, a second driving rope, a third driving rope, a fourth driving rope, a fifth driving rope, a sixth driving rope, a seventh driving rope and an eighth driving rope, the fixed pulley assembly includes a first fixed pulley, a second fixed pulley, a third fixed pulley, a fourth fixed pulley, a fifth fixed pulley, a sixth fixed pulley, a seventh fixed pulley, an eighth fixed pulley, a ninth fixed pulley and a tenth fixed pulley, the first fixed pulley, the second fixed pulley, the third fixed pulley, the fourth fixed pulley, the fifth fixed pulley, the sixth fixed pulley and the seventh fixed pulley are respectively arranged in the upper direction, the upper right direction, the right direction, the lower right direction, the lower left direction, the left direction and the upper left direction of the flexible light-shielding sheet, the eighth fixed pulley and the ninth fixed pulley are both arranged in the lower direction of the flexible light-shielding sheet and are arranged side by side on the left and right, the tenth fixed pulley is arranged in the lower direction of the ninth fixed pulley, and the axis of the tenth fixed pulley is located between the axis centers of the eighth and ninth fixed pulleys;

[0010] One end of the first driving rope is connected to the edge of the flexible light shielding sheet near the light hole from the upper side of the flexible light shielding sheet, and the other end of the first driving rope passes through at least the first fixed pulley, the second fixed pulley, and the fourth fixed pulley, and passes through between the eighth fixed pulley and the ninth fixed pulley to be connected to the driver;

[0011] One end of the second driving rope is connected to the edge of the flexible light shielding sheet near the light hole from the upper right direction of the flexible light shielding sheet, and the other end of the second driving rope passes through at least the second fixed pulley and the fourth fixed pulley and passes between the eighth fixed pulley and the ninth fixed pulley to be connected to the driver;

[0012] One end of the third driving rope is connected to the edge of the flexible light shielding sheet near the light hole from the right direction of the flexible light shielding sheet, and the other end of the third driving rope passes through the third fixed pulley and the fourth fixed pulley, and passes through between the eighth fixed pulley and the ninth fixed pulley to be connected to the driver;

[0013] One end of the fourth driving rope is connected to the edge of the flexible light shielding sheet near the light hole from the lower right direction of the flexible light shielding sheet, and the other end of the fourth driving rope passes through the fourth fixed pulley and out between the eighth fixed pulley and the ninth fixed pulley to be connected to the driver;

[0014] One end of the fifth driving rope is connected to the edge of the flexible light shielding sheet near the light hole from the bottom direction of the flexible light shielding sheet, and the other end of the fifth driving rope passes through between the eighth fixed pulley and the ninth fixed pulley and is connected to the driver;

[0015] One end of the sixth driving rope is connected to the edge of the flexible light shielding sheet near the light hole from the lower left direction of the flexible light shielding sheet, and the other end of the sixth driving rope passes through the fifth fixed pulley and out between the eighth fixed pulley and the ninth fixed pulley to be connected to the driver;

[0016] One end of the seventh driving rope is connected to the edge of the flexible light shielding sheet near the light hole from the left direction of the flexible light shielding sheet, and the other end of the seventh driving rope passes through the sixth fixed pulley and the fifth fixed pulley, and passes through between the eighth fixed pulley and the ninth fixed pulley to be connected to the driver;

[0017] One end of the eighth driving rope is connected to the edge of the flexible light shielding sheet near the light hole from the upper left direction of the flexible light shielding sheet, and the other end of the eighth driving rope passes through at least the seventh fixed pulley and the fifth fixed pulley, and passes between the eighth fixed pulley and the ninth fixed pulley to be connected to the driver;

[0018] All ends of the driving ropes away from the light-through hole are connected to the driver through the tenth fixed pulley.

[0019] Furthermore, the driver includes a first electromagnet, a second electromagnet, and a magnet located between the first electromagnet and the second electromagnet, the first electromagnet and the second electromagnet are used to drive the magnet to move between the first electromagnet and the second electromagnet, and one end of the magnet is connected to all the driving ropes.

[0020] Furthermore, the driving assembly includes a transmission assembly, which is connected between the driver and the driving rope, and the driver drives the driving rope to move through the transmission assembly.

[0021] Furthermore, the transmission assembly includes a winding wheel, a guide wheel and a transmission rope, all of the drive ropes are connected to the winding wheel, the guide wheel is arranged between the winding wheel and the driver, one end of the transmission rope is connected to the driver through the guide wheel, and the other end of the transmission rope is connected to the winding wheel, and the driver drives the winding wheel to rotate through the transmission rope.

[0022] Furthermore, the variable aperture structure includes a displacement sensor, which is mounted on the base and is used to detect the moving distance of the driving rope.

[0023] Furthermore, the variable aperture structure includes a plurality of elastic members, wherein the plurality of elastic members are connected to the edge of the flexible light-shielding sheet near the light-through hole from multiple radial directions of the light-through hole, and the ends of the plurality of elastic members away from the light-through hole are fixed to the base, and the elastic members have an elastic force for driving the light-through hole to contract.

[0024] The present application also provides a camera module, including a lens, a motor, a filter, a bracket, a circuit board, a photosensitive element and the variable aperture structure as described above, wherein the lens is arranged inside the motor, the filter is arranged on the bracket, the motor is arranged above the filter, the bracket is arranged on the circuit board, the photosensitive element is arranged on the upper surface of the circuit board, the variable aperture structure is arranged between the lens and the filter and is used to control the amount of light entering the camera module, the driver of the variable aperture structure is electrically connected to the circuit board, and the photosensitive element is electrically connected to the circuit board.

[0025] The present application also provides an electronic device comprising the camera module as described above.

[0026] The beneficial effect of the present invention is that a flexible light-shielding sheet is used as an aperture, a driving component is installed on a base and connected to the flexible light-shielding sheet at the edge near the light-through hole, and the driving component is used to drive the flexible light-shielding sheet to deform, thereby expanding the light-through hole. After the driving force of the driving component is withdrawn, the flexible light-shielding sheet automatically recovers, thereby shrinking the light-through hole. Therefore, the present application can realize the adjustment of the aperture through a simple structure, and the control method is also relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of the variable aperture structure of the present invention in its initial state;

[0028] Figure 2 This is a schematic diagram of the back structure of the variable aperture structure of the present invention in the initial state;

[0029] Figure 3 This is a side view structural diagram of the variable aperture structure in the utility model;

[0030] Figure 4 This is a schematic structural diagram of the variable aperture structure of the present invention in a semi-open state;

[0031] Figure 5 This is a schematic diagram of the back structure of the variable aperture structure of the present invention when it is in a semi-open state;

[0032] Figure 6 This is a schematic structural diagram of the variable aperture structure of the present invention when it is in a fully open state;

[0033] Figure 7 It is a schematic diagram of the back structure of the variable aperture structure of the present invention when it is in a fully opened state.

[0034] In the figure: base 10, through hole 101; flexible light shielding sheet 20, light hole 201; drive assembly 30, driver 31, first electromagnet 311, first connecting terminal 311a, second electromagnet 312, second connecting terminal 312a, magnet 313, multiple drive ropes 32, first drive rope 321, second drive rope 322, third drive rope 323, fourth drive rope 324, fifth drive rope 325, sixth drive rope 326, seventh drive rope 327, eighth drive rope 328, fixed pulley assembly 33 , first fixed pulley 331, second fixed pulley 332, third fixed pulley 333, fourth fixed pulley 334, fifth fixed pulley 335, sixth fixed pulley 336, seventh fixed pulley 337, eighth fixed pulley 338, ninth fixed pulley 339, tenth fixed pulley 3310, transmission assembly 34, winding wheel 341, guide wheel 342, transmission rope 343; displacement sensor 40, third connecting terminal 41; elastic member 50, first elastic member 51, second elastic member 52, third elastic member 53, fourth elastic member 54. DETAILED DESCRIPTION

[0035] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose of the present invention, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effects of the variable aperture structure, camera module, and electronic device proposed in the present invention:

[0036] Figure 1 It is a structural schematic diagram of the variable aperture structure of the utility model in the initial state. Figure 2 It is a schematic diagram of the back structure of the variable aperture structure of the present invention in the initial state. Figure 3 It is a side view structural diagram of the variable aperture structure in the utility model.

[0037] like Figures 1 to 3 As shown, the present invention provides a variable aperture structure, comprising a base 10, a flexible light shielding sheet 20, and a drive assembly 30. The base 10 is provided with a through hole 101, and the flexible light shielding sheet 20 is mounted at the through hole 101. The flexible light shielding sheet 20 is provided with a light hole 201. The drive assembly 30 is mounted on the base 10 and connected to the flexible light shielding sheet 20 near the edge of the light hole 201. The drive assembly 30 is used to drive the light hole 201 to expand. Optionally, the center of the light hole 201 is aligned with the center of the through hole 101.

[0038] In this embodiment, the drive assembly 30 includes a driver 31, multiple drive ropes 32, and a fixed pulley assembly 33. The multiple drive ropes 32 are connected to the edge of the flexible light shielding sheet 20 near the light aperture 201 in multiple radial directions (diameter direction) of the light aperture 201. The ends of the multiple drive ropes 32, distal to the light aperture 201, are connected to the driver 31 via the fixed pulley assembly 33. The driver 31 drives the light aperture 201 to expand via the multiple drive ropes 32. Specifically, the driver 31 pulls the edge of the light aperture 201 in multiple radial directions via the multiple drive ropes 32, causing the flexible light shielding sheet 20 to deform and expand the light aperture 201. Because the drive ropes 32 are flexible, the multiple drive ropes 32 change their pulling direction via the fixed pulley assembly 33, allowing them to be connected to the same driver 31, further simplifying the structure of the variable aperture. Of course, in other embodiments, the driving component 30 may also adopt multiple telescopic mechanisms, and the multiple telescopic mechanisms are connected to the edge of the flexible light-shielding sheet 20 near the light-through hole 201 from multiple radial directions of the light-through hole 201. The multiple telescopic mechanisms are synchronously extended and retracted, thereby driving the light-through hole 201 to expand and contract. This structure adopts more driving mechanisms and is more complicated, but this embodiment is not excluded.

[0039] Optionally, the base 10 may be provided with multiple guide points at the edge of the through hole 101, and the flexible light shielding sheet 20 may be provided with multiple connection points at the edge of the light hole 201. The guide points correspond to the connection points one by one, and one end of the drive rope 32 passes through the guide points and then connects to the connection points at the edge of the light hole 201. This ensures that the driving force provided by the drive rope 32 is more balanced, and the resulting aperture size is uniform and highly accurate. A drive rope 32 forms a radial straight line from the connection point at the edge of the light hole 201 to the guide point at the edge of the through hole 101.

[0040] Furthermore, the number of the driving ropes 32 is at least 3, and the number of the driving ropes 32 can be 4, 8, or 12. The more the number of the driving ropes 32, the closer the light hole 201 is to a circle, but the more complex the structure. Figure 1 As shown, the number of drive ropes 32 in the present application is 8, namely the first drive rope 321, the second drive rope 322, the third drive rope 323, the fourth drive rope 324, the fifth drive rope 325, the sixth drive rope 326, the seventh drive rope 327 and the eighth drive rope 328. It can be understood that there is a drive rope 32 corresponding to the edge of each light hole 201 and the edge of the through hole 101 in the straight direction. The fixed pulley assembly 33 includes a first fixed pulley 331, a second fixed pulley 332, a third fixed pulley 333, a fourth fixed pulley 334, a fifth fixed pulley 335, a sixth fixed pulley 336, a seventh fixed pulley 337, an eighth fixed pulley 338, a ninth fixed pulley 339 and a tenth fixed pulley 3310. The first fixed pulley 331, the second fixed pulley 332, the third fixed pulley 333, the fourth fixed pulley 334, the fifth fixed pulley 335, the sixth fixed pulley 336 The seventh fixed pulley 337 is respectively located in the upper, upper right, right, lower right, lower left, left, and upper left directions of the flexible light shielding sheet 20. The eighth and ninth fixed pulleys 338 and 339 are both located below the flexible light shielding sheet 20 and arranged side by side. The tenth fixed pulley 3310 is located below the ninth fixed pulley 339, with the axis of the tenth fixed pulley 3310 located between the axes of the eighth and ninth fixed pulleys 338 and 339. The eighth and ninth fixed pulleys 338 and 339 are used to gather the multiple drive ropes 32 together and also limit and tension the multiple drive ropes 32. The tenth fixed pulley 3310 is used to guide the multiple drive ropes 32 toward the driver 31, facilitating connection to a single driver 31.

[0041] One end of the first drive rope 321 extends from the upper side of the flexible light shielding sheet 20 to connect to the edge of the flexible light shielding sheet 20 near the light hole 201. The other end of the first drive rope 321 passes through at least the first fixed pulley 331, the second fixed pulley 332, and the fourth fixed pulley 334, and then passes between the eighth fixed pulley 338 and the ninth fixed pulley 339 to connect to the driver 31. In this embodiment, the first drive rope 321 also passes through the third fixed pulley 333, which can provide some support for the first drive rope 321.

[0042] One end of the second drive rope 322 is connected to the edge of the flexible light-shielding sheet 20 near the light-through hole 201 from the upper right side. The other end of the second drive rope 322 passes through at least the second fixed pulley 332 and the fourth fixed pulley 334, and then passes between the eighth fixed pulley 338 and the ninth fixed pulley 339 to connect to the driver 31. In this embodiment, the second drive rope 322 also passes through the third fixed pulley 333, which can provide some support for the second drive rope 322.

[0043] One end of the third driving rope 323 is connected to the edge of the flexible shading sheet 20 near the light hole 201 from the right direction of the flexible shading sheet 20, and the other end of the third driving rope 323 passes through the third fixed pulley 333 and the fourth fixed pulley 334 and passes out from between the eighth fixed pulley 338 and the ninth fixed pulley 339 and is connected to the driver 31.

[0044] One end of the fourth driving rope 324 is connected to the edge of the flexible shading sheet 20 near the light hole 201 from the lower right direction of the flexible shading sheet 20, and the other end of the fourth driving rope 324 passes through the fourth fixed pulley 334 and passes out from between the eighth fixed pulley 338 and the ninth fixed pulley 339 and is connected to the driver 31.

[0045] One end of the fifth driving rope 325 is connected to the edge of the flexible shading sheet 20 near the light hole 201 from the bottom direction of the flexible shading sheet 20, and the other end of the fifth driving rope 325 passes through between the eighth fixed pulley 338 and the ninth fixed pulley 339 and is connected to the driver 31.

[0046] One end of the sixth drive rope 326 is connected to the edge of the flexible shading sheet 20 near the light hole 201 from the lower left direction of the flexible shading sheet 20, and the other end of the sixth drive rope 326 passes through the fifth fixed pulley 335 and passes out from between the eighth fixed pulley 338 and the ninth fixed pulley 339 and is connected to the driver 31.

[0047] One end of the seventh driving rope 327 is connected to the edge of the flexible shading sheet 20 near the light hole 201 from the left direction of the flexible shading sheet 20, and the other end of the seventh driving rope 327 passes through the sixth fixed pulley 336 and the fifth fixed pulley 335 and passes through between the eighth fixed pulley 338 and the ninth fixed pulley 339 and is connected to the driver 31.

[0048] One end of the eighth drive rope 328 is connected to the edge of the flexible light-shielding sheet 20 near the light-through hole 201 from the upper left side. The other end of the eighth drive rope 328 passes through at least the seventh fixed pulley 337 and the fifth fixed pulley 335, and then passes between the eighth fixed pulley 338 and the ninth fixed pulley 339 to connect to the driver 31. In this embodiment, the eighth drive rope 328 also passes through the sixth fixed pulley 336, which provides some support for the eighth drive rope 328.

[0049] The ends of all the drive ropes 32 away from the light hole 201 pass through between the eighth fixed pulley 338 and the ninth fixed pulley 339, and are connected to the driver 31 via the tenth fixed pulley 3310. Of course, in other embodiments, the drive ropes 32 may also be wound in other ways, so long as multiple drive ropes 32 are guided to the driver 31.

[0050] In this embodiment, the driver 31 includes a first electromagnet 311, a second electromagnet 312, and a magnet 313 located between the first electromagnet 311 and the second electromagnet 312. The first electromagnet 311 and the second electromagnet 312 are used to drive the magnet 313 to move between the first electromagnet 311 and the second electromagnet 312. One end of the magnet 313 is connected to all the driving ropes 32. The first electromagnet 311 generates a repulsive force F1 on the magnet, and the magnitude of the repulsive force F1 is controlled by the magnitude of the current A1. The second electromagnet 312 generates a repulsive force F2 on the magnet, and the magnitude of the repulsive force F2 is controlled by the magnitude of the current A2. Ultimately, by controlling the magnitudes of the currents A1 and A2, the magnitudes of the electromagnet repulsive forces F1 and F2 are controlled. F2 increases, F1 decreases, the magnet 313 moves toward the first electromagnet 311, and the multiple drive ropes 32 pull the flexible light-shielding sheet 20 outward in multiple radial directions (inward direction toward the center of the light-through hole 201, outward direction away from the center of the light-through hole 201), and the aperture opening (light-through hole 201) becomes larger; otherwise, the aperture opening (light-through hole 201) becomes smaller.

[0051] Furthermore, the variable aperture structure includes a displacement sensor 40, which is mounted on the base 10 and is used to detect the travel distance of the drive rope 32. Optionally, the displacement sensor 40 employs a sliding rheostat structure. Utilizing the characteristics of resistance and the calculation formula R=ρL / S, where ρ is a constant resistivity and S is a constant cross-sectional area, L changes with the movement of the magnet 313. The displacement L of the magnet 313 can be accurately determined, thereby sensing the aperture position and size and achieving a closed-loop aperture control. Of course, in other embodiments, the displacement sensor 40 may also employ other sensors capable of detecting travel distance, and the invention is not limited thereto. Alternatively, the driver 31 employs a servo motor coupled with a nut-screw structure. Since the servo motor can precisely control the rotor's rotation angle, the travel distance of the screw can be calculated, eliminating the need for a separate displacement sensor 40.

[0052] Among them, Figure 3 As shown, the first electromagnet 311 has two first connecting terminals 311a of positive and negative poles, the second electromagnet 312 has two second connecting terminals 312a of positive and negative poles, and the displacement sensor 40 has two third connecting terminals 41 of positive and negative poles. The first connecting terminal 311a, the second connecting terminal 312a and the third connecting terminal 41 are all arranged on the side of the base 10, so that when installed on the camera module, it is convenient to achieve electrical contact with the circuit structure of the camera module, thereby realizing drive control and monitoring feedback of the moving distance.

[0053] Furthermore, the drive assembly 30 includes a transmission assembly 34, which is connected between the driver 31 and the drive rope 32. The driver 31 drives the drive rope 32 to move through the transmission assembly 34. Optionally, the transmission assembly 34 includes a winding wheel 341, a guide wheel 342, and a transmission rope 343. All the drive ropes 32 are connected to the winding wheel 341. The guide wheel 342 is provided between the winding wheel 341 and the driver 31. One end of the transmission rope 343 is connected to the driver 31 through the guide wheel 342, and the other end of the transmission rope 343 is connected to the winding wheel 341. The driver 31 drives the winding wheel 341 to rotate through the transmission rope 343. The winding wheel 341 includes a first wheel and a second wheel. The other end of the transmission rope 343 is wound around the first wheel of the winding wheel 341, and one end of each drive rope 32 is wound around the second wheel of the winding wheel 341. The diameter D1 of the first wheel is smaller than the diameter D2 of the second wheel. This allows the actuator 31 to move a relatively small distance L, thereby correspondingly increasing the diameter D3 of the aperture opening (light hole 201). D3 = 2*L*D2 / D1, thereby relatively optimizing the volume of the actuator 31. For example, if the diameter D2 of the second wheel is five times the diameter D1 of the first wheel, and the magnet 313 moves 1 mm toward the first electromagnet 311, each drive rope 32 can be driven to move 5 mm, thereby increasing the diameter D3 of the aperture opening (light hole 201) by 10 mm. In other words, if the magnet 313 moves 1 mm, the diameter D3 of the aperture opening (light hole 201) can be controlled to increase by 10 mm, significantly reducing the volume of the actuator 31.

[0054] In this embodiment, the variable aperture structure includes a plurality of elastic members 50. The plurality of elastic members 50 are connected to the edge of the flexible light shielding sheet 20 near the light hole 201 in multiple radial directions relative to the light hole 201. The plurality of elastic members 50 are fixed to the base 10 at their ends distal from the light hole 201. The elastic members 50 exert an elastic force that causes the light hole 201 to contract. Specifically, there are four elastic members 50, namely a first elastic member 51, a second elastic member 52, a third elastic member 53, and a fourth elastic member 54. The first elastic member 51, the second elastic member 52, the third elastic member 53, and the fourth elastic member 54 are respectively disposed in the upper, right, lower, and left directions of the flexible light shielding sheet 20. The first elastic member 51, the second elastic member 52, the third elastic member 53, and the fourth elastic member 54 are compression springs, and their elastic forces can be adjusted according to actual needs. Optionally, the first drive rope 321 passes through the center of the first elastic member 51, thereby providing a certain position limit for the first elastic member 51 and preventing the first elastic member 51 from being significantly bent in the radial direction after compression. The third drive rope 323 passes through the center of the second elastic member 52, thereby providing a certain position limit for the second elastic member 52 and preventing the second elastic member 52 from being significantly bent in the radial direction after compression. The fifth drive rope 325 passes through the center of the third elastic member 53, thereby providing a certain position limit for the third elastic member 53 and preventing the third elastic member 53 from being significantly bent in the radial direction after compression. The seventh drive rope 327 passes through the center of the fourth elastic member 54, thereby providing a certain position limit for the fourth elastic member 54 and preventing the fourth elastic member 54 from being significantly bent in the radial direction after compression. Of course, the flexible light shielding sheet 20 can also be made of a material with a certain elasticity to provide a certain reset capability. Alternatively, an elastic ring (e.g., a rubber ring) is provided at the edge of the light hole 201 to drive the light hole 201 to contract and reset.

[0055] Figure 4 It is a structural schematic diagram of the variable aperture structure of the utility model in a semi-open state. Figure 5 This is a schematic diagram of the back structure of the variable aperture structure of the present invention when it is in a semi-open state. Figure 4 and Figure 5 As shown, when it is necessary to control the diameter of the aperture opening (light-through hole 201) to become larger (half-open), the driver 31 pulls the multiple drive ropes 32, and the multiple drive ropes 32 are pulled outward from multiple radial directions of the light-through hole 201, thereby increasing the size of the aperture opening (light-through hole 201), and at the same time, the multiple elastic members 50 are compressed.

[0056] Figure 6 It is a structural schematic diagram of the variable aperture structure of the present invention when it is in a fully open state. Figure 7 This is a schematic diagram of the back structure of the variable aperture structure of the present invention when it is in a fully open state. Figure 6 and Figure 7 As shown, when it is necessary to control the aperture opening (light-through hole 201) to be fully opened, the driver 31 continues to pull the multiple drive ropes 32, and the multiple drive ropes 32 are pulled outward from multiple radial directions of the light-through hole 201, so that the size of the aperture opening (light-through hole 201) becomes the largest, and at the same time, the multiple elastic members 50 are compressed to the shortest.

[0057] When it is necessary to control the diameter of the aperture opening (light hole 201) to become smaller, it is only necessary to control the driver 31 to move in the opposite direction so that the multiple drive ropes 32 are relaxed. The flexible light-shielding sheet 20, under the action of its own elasticity or multiple elastic parts 50, drives the light hole 201 to shrink, reset and become smaller.

[0058] The present application also provides a camera module, including a lens, a motor, a filter, a bracket, a circuit board, a photosensitive element and the variable aperture structure as described above, wherein the lens is arranged inside the motor, the motor is used to adjust the distance of the lens moving up and down, the filter is arranged on the bracket, the filter is used to filter light, the motor is arranged above the filter, the bracket is arranged on the circuit board, and the photosensitive chip is arranged on the upper surface of the circuit board, wherein the variable aperture structure is supported between the lens and the filter by the base 10 and is used to control the amount of light entering the camera module, and the driver 31 on the variable aperture structure is electrically connected to the circuit board, and the photosensitive element is electrically connected to the circuit board. Of course, the variable aperture structure can also be arranged between the filter and the photosensitive element. Among them, the center of the light hole 201 is aligned with the center of the lens, and the lens plays a focusing role, so that the light can be concentrated on the photosensitive element; the variable aperture structure controls the amount of light entering the camera module by changing the size of the aperture opening; the photosensitive element is used to sense light and convert the light signal into an electrical signal. The variable aperture structure is integrated inside the camera module, which can reduce the size of the overall camera module to a certain extent.

[0059] The present application also provides an electronic device, including the camera module as described above. Due to the use of the variable aperture structure of the present application, the thickness of the electronic device can be made thinner and can capture high-quality images. For example, the electronic device is a mobile phone, a laptop computer, a tablet computer, etc.

[0060] In this document, directional terms such as "up," "down," "left," "right," "front," and "back" are defined based on the positions of structures in the accompanying drawings and their relative positions to each other, for the sake of clarity and convenience in presenting the technical solution. It should be understood that the use of these directional terms does not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein, are used solely for distinctions and are not intended to limit quantity or order.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to the technical content disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A variable aperture structure, characterized in that: The invention comprises a base (10), a flexible light shielding sheet (20) and a driving assembly (30), wherein the base (10) is provided with a through hole (101), the flexible light shielding sheet (20) is installed at the through hole (101), the flexible light shielding sheet (20) is provided with a light through hole (201), the driving assembly (30) is installed on the base (10) and is connected to the flexible light shielding sheet (20) at an edge close to the light through hole (201), and the driving assembly (30) is used for driving the light through hole (201) to expand.

2. The variable aperture structure according to claim 1, characterized in that: The driving assembly (30) comprises a driver (31), a plurality of driving ropes (32) and a fixed pulley assembly (33). The plurality of driving ropes (32) are connected to the edge of the flexible light shielding sheet (20) near the light through hole (201) from multiple radial directions of the light through hole (201). One end of the plurality of driving ropes (32) away from the light through hole (201) is connected to the driver (31) through the fixed pulley assembly (33). The driver (31) drives the light through hole (201) to expand through the plurality of driving ropes (32).

3. The variable aperture structure according to claim 2, characterized in that: The plurality of driving ropes (32) include a first driving rope (321), a second driving rope (322), a third driving rope (323), a fourth driving rope (324), a fifth driving rope (325), a sixth driving rope (326), a seventh driving rope (327) and an eighth driving rope (328); the fixed pulley assembly (33) includes a first fixed pulley (331), a second fixed pulley (332), a third fixed pulley (333), a fourth fixed pulley (334), a fifth fixed pulley (335), a sixth fixed pulley (336), a seventh fixed pulley (337), an eighth fixed pulley (338), a ninth fixed pulley (339) and a tenth fixed pulley (3310); the first fixed pulley (331), the second fixed pulley (332), the third fixed pulley (333), the fourth fixed pulley (334), the fifth fixed pulley (335), the sixth fixed pulley (336), the seventh fixed pulley (337), the eighth fixed pulley (338), the ninth fixed pulley (339) and the tenth fixed pulley (3310); 32), the third fixed pulley (333), the fourth fixed pulley (334), the fifth fixed pulley (335), the sixth fixed pulley (336) and the seventh fixed pulley (337) are respectively arranged in the upper direction, upper right direction, right direction, lower right direction, lower left direction, left direction and upper left direction of the flexible light shielding sheet (20), the eighth fixed pulley (338) and the ninth fixed pulley (339) are both arranged in the lower direction of the flexible light shielding sheet (20) and are arranged side by side on the left and right sides, the tenth fixed pulley (3310) is arranged in the lower direction of the ninth fixed pulley (339), and the axis of the tenth fixed pulley (3310) is located between the axis of the eighth fixed pulley (338) and the axis of the ninth fixed pulley (339); One end of the first driving rope (321) is connected to the edge of the flexible light shielding sheet (20) near the light through hole (201) from the upper direction of the flexible light shielding sheet (20), and the other end of the first driving rope (321) passes through at least the first fixed pulley (331), the second fixed pulley (332), and the fourth fixed pulley (334), and passes through between the eighth fixed pulley (338) and the ninth fixed pulley (339) and is connected to the driver (31); One end of the second driving rope (322) is connected to the edge of the flexible light shielding sheet (20) near the light hole (201) from the upper right direction of the flexible light shielding sheet (20), and the other end of the second driving rope (322) passes through at least the second fixed pulley (332) and the fourth fixed pulley (334) and passes through between the eighth fixed pulley (338) and the ninth fixed pulley (339) and is connected to the driver (31); One end of the third driving rope (323) is connected to the edge of the flexible light shielding sheet (20) near the light through hole (201) from the right direction of the flexible light shielding sheet (20), and the other end of the third driving rope (323) passes through the third fixed pulley (333) and the fourth fixed pulley (334) and passes through between the eighth fixed pulley (338) and the ninth fixed pulley (339) and is connected to the driver (31); One end of the fourth driving rope (324) is connected to the edge of the flexible light shielding sheet (20) near the light through hole (201) from the lower right direction of the flexible light shielding sheet (20), and the other end of the fourth driving rope (324) passes through the fourth fixed pulley (334) and passes between the eighth fixed pulley (338) and the ninth fixed pulley (339) and is connected to the driver (31); One end of the fifth driving rope (325) is connected to the edge of the flexible light shielding sheet (20) near the light through hole (201) from the bottom direction of the flexible light shielding sheet (20), and the other end of the fifth driving rope (325) passes through between the eighth fixed pulley (338) and the ninth fixed pulley (339) and is connected to the driver (31); One end of the sixth driving rope (326) is connected to the edge of the flexible light shielding sheet (20) near the light through hole (201) from the lower left direction of the flexible light shielding sheet (20), and the other end of the sixth driving rope (326) passes through the fifth fixed pulley (335) and passes between the eighth fixed pulley (338) and the ninth fixed pulley (339) and is connected to the driver (31); One end of the seventh driving rope (327) is connected to the edge of the flexible light shielding sheet (20) near the light through hole (201) from the left direction of the flexible light shielding sheet (20), and the other end of the seventh driving rope (327) passes through the sixth fixed pulley (336) and the fifth fixed pulley (335) and passes through between the eighth fixed pulley (338) and the ninth fixed pulley (339) and is connected to the driver (31); One end of the eighth driving rope (328) is connected to the edge of the flexible light shielding sheet (20) near the light through hole (201) from the upper left direction of the flexible light shielding sheet (20), and the other end of the eighth driving rope (328) passes through at least the seventh fixed pulley (337) and the fifth fixed pulley (335) and passes through between the eighth fixed pulley (338) and the ninth fixed pulley (339) and is connected to the driver (31); All of the drive ropes (32) are connected to the driver (31) at one end away from the light-through hole (201) via the tenth fixed pulley (3310).

4. The variable aperture structure according to claim 2, wherein: The driver (31) comprises a first electromagnet (311), a second electromagnet (312), and a magnet (313) located between the first electromagnet (311) and the second electromagnet (312). The first electromagnet (311) and the second electromagnet (312) are used to drive the magnet (313) to move between the first electromagnet (311) and the second electromagnet (312). One end of the magnet (313) is connected to all the driving ropes (32).

5. The variable aperture structure according to claim 2, wherein: The driving assembly (30) includes a transmission assembly (34), wherein the transmission assembly (34) is connected between the driver (31) and the driving rope (32), and the driver (31) drives the driving rope (32) to move through the transmission assembly (34).

6. The variable aperture structure according to claim 5, characterized in that: The transmission assembly (34) includes a winding wheel (341), a guide wheel (342) and a transmission rope (343), all of the driving ropes (32) are connected to the winding wheel (341), the guide wheel (342) is arranged between the winding wheel (341) and the driver (31), one end of the transmission rope (343) is connected to the driver (31) through the guide wheel (342), and the other end of the transmission rope (343) is connected to the winding wheel (341), and the driver (31) drives the winding wheel (341) to rotate through the transmission rope (343).

7. The variable aperture structure according to claim 2, wherein: The variable aperture structure includes a displacement sensor (40), which is mounted on the base (10) and is used to detect the moving distance of the driving rope (32).

8. The variable aperture structure according to any one of claims 1 to 7, characterized in that: The variable aperture structure comprises a plurality of elastic members (50), wherein the plurality of elastic members (50) are connected to the edge of the flexible light shielding sheet (20) close to the light through hole (201) in multiple radial directions of the light through hole (201), and one end of the plurality of elastic members (50) away from the light through hole (201) is fixed to the base (10), and the elastic members (50) have an elastic force for driving the light through hole (201) to contract.

9. A camera module, characterized in that: The invention comprises a lens, a motor, a filter, a bracket, a circuit board, a photosensitive element and a variable aperture structure as described in any one of claims 1 to 8, wherein the lens is arranged inside the motor, the filter is arranged on the bracket, the motor is arranged above the filter, the bracket is arranged on the circuit board, the photosensitive element is arranged on the upper surface of the circuit board, the variable aperture structure is arranged between the lens and the filter and is used to control the amount of light entering the camera module, the driver (31) of the variable aperture structure is electrically connected to the circuit board, and the photosensitive element is electrically connected to the circuit board.

10. An electronic device, characterized in that: Including the camera module as described in claim 9.

Images