Lens aperture adjusting device

Abstract

The utility model provides a lens aperture adjusting device. The lens aperture adjusting device comprises a top cover, a plurality of blades, a movable seat, a driving assembly and a fixed seat which are coaxially arranged from top to bottom, the edge of the top cover is fixedly connected with the edge of the fixed seat to form a movable space for accommodating the blades and the movable seat; the movable seat is rotatably sleeved on the fixed seat, and the plurality of blades are annularly arranged on the movable seat and are respectively connected with the fixed seat and the movable seat; an auxiliary rotating assembly is arranged on the inner side of the fixed seat, a magnetic attraction assembly is arranged on the fixed seat, the magnetic attraction assembly interacts with the magnet with the wedge-shaped inclined plane in the driving assembly and generates adsorption force, and the magnet with the wedge-shaped inclined plane is arranged opposite to the position sensor; when the driving assembly drives the movable seat and drives the blades to rotate, the adsorption force enables the outer wall of one side of the movable seat to get close and make contact with the auxiliary rotating assembly. The device provided by the utility model is compact in overall structure, and the overall stability of the device in the aperture adjusting process is ensured.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a lens aperture adjustment device. Background Technology

[0002] Regarding camera aperture, in bright light, a smaller aperture allows for greater depth of field and sharper images, while in low light, a larger aperture increases light intake, resulting in higher exposure and lower noise for a cleaner image. However, in the field of electronic devices, cameras generally cannot change their aperture size. Therefore, they cannot adapt to various shooting environments by adjusting the aperture. This leads to situations where electronic devices overexpose in bright sunlight outdoors, while underexposing at night, resulting in dark, noisy images with lost detail. Furthermore, when using existing aperture adjustment devices, the stability of the device itself during adjustment is often unreliable, compromising the accuracy of aperture adjustment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lens aperture adjustment device with a compact overall structure, so as to improve the overall stability of the device and the accuracy of lens aperture adjustment during the adjustment process.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A lens aperture adjustment device includes a top cover, multiple blades, a movable seat, a drive assembly, and a fixed seat arranged coaxially from top to bottom.

[0006] The edge of the top cover is fixedly connected to the edge of the fixed base to form an active space that accommodates multiple blades and the movable base; the base is equipped with a position sensor.

[0007] The movable seat is rotatably sleeved on the fixed seat, and a plurality of blades are arranged in a ring on the movable seat and are respectively connected to the fixed seat and the movable seat;

[0008] An auxiliary rotation component is provided on the inner side of the fixed base, and a magnetic attraction component is provided on the fixed base. The magnetic attraction component interacts with the magnet with a wedge-shaped inclined surface in the driving component and generates an attraction force. The magnet with the wedge-shaped inclined surface is arranged opposite to the position sensor.

[0009] When the driving component drives the movable seat and causes the multiple blades to rotate, the adsorption force causes one side of the outer wall of the movable seat to approach and contact the auxiliary rotation component, so as to assist in driving one side of the outer wall of the movable seat to rotate around the fixed seat.

[0010] In one embodiment, the mounting base includes:

[0011] base;

[0012] Fixed protrusions, which are paired and symmetrically arranged on both sides of the edge of the base, with the top end of each fixed protrusion fixedly connected to the edge of the top cover; and

[0013] A support protrusion is provided on the base and arranged in the annular area formed by the fixed protrusion. The support protrusion is sleeved in the movable seat and the upper end surface of the support protrusion is flush with the upper end surface of the movable seat and in contact with the lower surface of the plurality of blades.

[0014] In one embodiment, the inner side of the fixed protrusion is provided with a stepped structure, and the auxiliary rotating component is disposed within the stepped structure of a pair of fixed protrusions located on one side of the base.

[0015] In one embodiment, the auxiliary rotating component is a ball bearing disposed in a stepped structure on the inner side of a pair of fixed protrusions on one side of the edge of the base.

[0016] In one embodiment, the top of the movable seat is provided with a plurality of movable columns, which are arranged in a ring around the top of the movable seat and are respectively movably connected to the other side of the plurality of blades.

[0017] The movable seat has a limiting groove on its edge. The position and number of the limiting grooves correspond one-to-one with the fixed edge of the movable seat base to avoid the fixed protrusion.

[0018] In one embodiment, the limiting groove is configured as a stepped structure, and a baffle protrusion is provided at the bottom of the inner side of the limiting groove on one side, the baffle protrusion being in contact with the auxiliary rotating component.

[0019] In one embodiment, the top ring of the support protrusion is provided with a plurality of pins, each of the plurality of pins corresponding to one of the plurality of blades and connected to one side of the corresponding blade by a pin.

[0020] In one embodiment, adjacent blades of the plurality of blades are staggered and overlapped, and each of the plurality of blades has a pin hole on one side that is connected to the pin of the pin column, and a movable hole on the other side that is movably connected to the movable column. When the movable seat rotates, the movable column drives the blades to rotate around the pin column to adjust the size of the aperture formed by the plurality of blades.

[0021] In one embodiment, the magnetic attraction component includes:

[0022] A first magnetic attraction component is disposed on the fixed base, and the position of the first magnetic attraction component is opposite to the position of the assisted rotating component; and

[0023] The second magnetic attraction component is disposed at the bottom of the fixing base;

[0024] Optionally, the first magnetic attraction component is a side magnetic attraction piece disposed on the other side of the support protrusion;

[0025] Optionally, the second magnetic component is an annular bottom magnetic plate disposed at the bottom of the base.

[0026] In one embodiment, the driving component includes:

[0027] A magnet is installed at the bottom of the movable base, and one end face of the magnet is set as a wedge-shaped inclined surface;

[0028] Circuit board, the circuit board being disposed below the movable seat and sleeved on the support protrusion; and

[0029] A coil plate is disposed on the circuit board and sleeved on the support protrusion. A coil is disposed inside the coil plate. The circuit board supplies power so that the coil inside the coil plate interacts with the magnet and generates a driving force to drive the movable seat to rotate.

[0030] Optionally, the position sensor is fixedly connected to the bottom of the circuit board, and before the drive assembly drives the movable seat to rotate, the position sensor is located below the end of the magnet with the wedge-shaped inclined surface.

[0031] The above-described solution of this utility model has at least the following beneficial effects:

[0032] The lens aperture adjustment device provided by the above-described solution of this utility model includes a top cover, multiple blades, a movable seat, a drive assembly, and a fixed seat arranged coaxially from top to bottom. The edge of the top cover is fixedly connected to the edge of the fixed seat, forming a movable space to accommodate the multiple blades and the movable seat. The movable seat is rotatably fitted onto the fixed seat. The multiple blades are arranged in a ring on the movable seat and are respectively connected to the fixed seat and the movable seat. An auxiliary rotation assembly is provided inside the fixed seat, and a magnetic attraction assembly is provided on the fixed seat. The magnetic attraction assembly is connected to the drive assembly. The components contain wedge-shaped magnets that interact and generate an attractive force. When the drive assembly drives the movable seat and rotates the multiple blades, the attractive force causes one side of the outer wall of the movable seat to approach and contact the auxiliary rotation assembly, thereby assisting in driving the movable seat to rotate around the fixed seat and reducing the friction between the movable seat and the fixed seat. At the same time, the magnet above the position monitored by the position sensor is set as an inclined structure. Since the magnetic field strength changes significantly at different positions on the inclined structure, the magnetic field changes detected by the position sensor are clearer when the magnet moves, increasing the monitoring accuracy. Attached Figure Description

[0033] Figure 1 This is an exploded view of the lens aperture adjustment device provided in this embodiment of the utility model;

[0034] Figure 2 This is a three-dimensional structural schematic diagram of a lens aperture adjustment device provided in an optional embodiment of the present invention;

[0035] Figure 3 This is a top view of a lens aperture adjustment device provided in an optional embodiment of this utility model;

[0036] Figure 4 This is a cross-sectional view of a lens aperture adjustment device provided in an optional embodiment of the present invention;

[0037] Figure 5 This is a three-dimensional structural diagram of the fixing base provided in an optional embodiment of the present utility model;

[0038] Figure 6 This is a three-dimensional structural schematic diagram of the fixing seat provided in an optional embodiment of the present utility model from another perspective;

[0039] Figure 7 This is a schematic diagram of the three-dimensional structure of the movable seat provided in an optional embodiment of the present invention;

[0040] Figure 8 This is a three-dimensional structural schematic diagram of the movable seat provided in an optional embodiment of the present invention from another perspective;

[0041] Figure 9This is a three-dimensional structural diagram illustrating the positional relationship between the movable seat and the circuit board according to an optional embodiment of the present invention;

[0042] Figure 10 This is a three-dimensional structural diagram of the positional relationship of the magnet circuit board provided in an optional embodiment of the present invention;

[0043] Figure 11 This is a three-dimensional structural schematic diagram of a circuit board provided in an optional embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of the three-dimensional structure of the top cover provided in an optional embodiment of the present invention;

[0045] Figure 13 This is a schematic diagram of multiple blades overlapping in an optional embodiment of the present invention;

[0046] Figure 14 This is a three-dimensional structural schematic diagram of the coil plate provided in an optional embodiment of the present invention;

[0047] Figure 15 This is a three-dimensional structural schematic diagram of the gasket provided in an optional embodiment of the present invention;

[0048] Figure 16 This is a three-dimensional structural diagram of the bottom magnetic absorbing sheet provided in an optional embodiment of the present invention;

[0049] Figure 17 This is a three-dimensional structural diagram of the blade, movable seat, coil plate, circuit board and fixed seat installation provided in an optional embodiment of the present utility model;

[0050] Figure 18 This is a three-dimensional structural diagram of the movable seat, coil board, circuit board, and fixed seat installation provided in an optional embodiment of this utility model.

[0051] Explanation of icon numbers:

[0052] 100. Lens aperture adjustment device;

[0053] 1. Top cover: 11. Fixing hole; 12. First light-transmitting hole;

[0054] 2. Fixing base; 20. Base; 21. Fixing protrusion; 211. Fixing post; 212. Ball bearing; 22. Supporting protrusion; 221. Pin post; 222. Third light-passing hole; 23. Side magnetic clasp; 24. Bottom magnetic clasp; 25. Bottom magnetic clasp mounting slot;

[0055] 3. Movable base; 30. Second light-transmitting hole; 31. Movable column; 32. Limiting groove; 33. Baffle protrusion;

[0056] 4. Blade; 41. Pin hole; 42. Movable hole;

[0057] 5. Gasket; 6. Magnet; 61. Wedge-shaped ramp; 7. Circuit board; 8. Coil board; 9. Position sensor; 10. Sensing capacitor. Detailed Implementation

[0058] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0059] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0060] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0061] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0062] like Figures 1 to 4As shown, an embodiment of this utility model proposes a lens aperture adjustment device 100, including a top cover 1, multiple blades 4, a movable seat 3, a drive assembly, and a bottom fixed seat 2 arranged coaxially from top to bottom. The edge of the top cover 1 is fixedly connected to the edge of the fixed seat 2, forming a space to accommodate the multiple blades 4 and the movable seat 3. The movable seat 3 is rotatably fitted onto the fixed seat 2. The multiple blades 4 are arranged in a ring on the movable seat 3 and are respectively connected to the fixed seat 2 and the movable seat 3. An auxiliary rotation assembly is provided inside the fixed seat 2, and a magnetic attraction assembly is provided on the fixed seat 2. This magnetic attraction assembly interacts with a magnet 6 with a wedge-shaped inclined surface in the drive assembly and generates an attraction force. When the drive assembly drives the movable seat 3 and rotates the multiple blades 4, under the action of this attraction force, one side of the outer wall of the movable seat 3 approaches and contacts the auxiliary rotation assembly, thereby assisting in driving the movable seat 3 to rotate around the fixed seat 2. Meanwhile, the magnet above the position monitored by the position sensor is set as an inclined structure. Since the magnetic field strength changes significantly at different positions on the inclined structure, the changes in the magnetic field detected by the position sensor are clearer when the position of the magnet moves, thus increasing the monitoring accuracy.

[0063] In this embodiment, the top edge of the fixed base 2 is fixedly connected to the top cover 1, and after the connection, a movable space is formed. Multiple blades 4, movable base 3 and driving components are all arranged in the movable space. The driving component is arranged below the movable base 3 and drives the movable base 3 to rotate around the fixed base 2 in the movable space of the cover. Multiple blades 4 are arranged above the fixed base 2 and the movable base 3 and are all connected to the fixed base 2 and the movable base 3.

[0064] Here, the mounting base 2 is fixed to the housing of the lens motor, and the center positions of the mounting base 2, the movable base 3, and the top cover 1 all correspond to the lens on the lens motor; preferably, as shown in the figure... Figure 12 As shown, a first light-transmitting hole 12 is provided at the center of the top cover 1; as Figure 7 As shown, a second light-transmitting hole 30 is provided at the center of the movable base 3; as Figure 5 As shown, a third light-transmitting hole 222 is provided at the center of the fixing base 2; as Figure 13As shown, multiple blades 4 overlap to form an annular through hole. When the top cover 1, multiple blades 4, movable seat 3, and fixed seat 2 are stacked, the first light-transmitting hole 12, the annular through hole, the second light-transmitting hole 30, and the third light-transmitting hole 222 are coaxially stacked to form the lens clearance hole of the lens motor. The size of the annular through hole is greater than or equal to the size of the first light-transmitting hole 12, and the first light-transmitting hole 12 and the third light-transmitting hole 222 are the same size. When the drive assembly drives the movable seat 3 to rotate in the movable space, the movable seat 3 drives one end of the multiple blades 4 to rotate. At this time, the size of the annular through hole will change. Since the annular through hole covers the second light-transmitting hole 30 and the third light-transmitting hole 222, when shooting, the light beam passes through the first light-transmitting hole 12, the annular through hole, and the third light-transmitting hole 222 in sequence. When the size of the annular through hole changes, the size of the light beam after passing through the first light-transmitting hole 12 will also change accordingly, thereby achieving lens blocking and lens aperture adjustment.

[0065] In practical applications, since the central axis of the lens aperture adjustment device 100 is parallel to the horizontal line, a magnetic suction component is provided on the fixed base 2 to prevent the movable base 3 from shaking and affecting the accuracy of aperture adjustment when rotating on the fixed base 2. The magnetic suction component and the driving component generate an attraction force, causing the movable base 3 to move closer to the fixed base 2, thus ensuring the stability of the movable base 3 when rotating and thus ensuring the accuracy of aperture adjustment. At the same time, an auxiliary rotating component is provided on the inner side of the fixed base 2. When the movable base 3 rotates, the outer wall of one side of the movable base 3 contacts the auxiliary rotating component under the action of the attraction force. With the assistance of the auxiliary rotating component, the movable base 3 can rotate smoothly around the fixed base 2. At the same time, the contact between the outer wall of one side of the movable base 3 and the auxiliary rotating component also reduces the contact area between the outer wall of one side of the movable base 3 and the fixed base 2, thereby reducing the friction force when the movable base 3 rotates relative to the fixed base 2 and avoiding affecting aperture adjustment.

[0066] In an optional embodiment of this utility model, the driving assembly includes a magnet 6, a circuit board 7, and a coil board 8. Wherein, as... Figures 8 to 10 As shown, magnet 6 is installed at the bottom of movable base 3, and one end face of magnet 6 is set as a wedge-shaped inclined surface 61; as Figures 17 to 18 As shown, circuit board 7 is located below movable seat 3 and sleeved on support protrusion 22; coil plate 8 is located on circuit board 7 and sleeved on support protrusion 22, and coil is provided inside coil plate 8. Circuit board 7 provides power so that the coil inside coil plate 8 interacts with magnet 6 and generates driving force to drive movable seat 3 to rotate.

[0067] Among them, magnet 6 can be a whole magnet structure or a combination of multiple magnets. The inclined structure can be arranged above the position sensor, or the entire magnet can use an inclined structure.

[0068] In this embodiment, a magnetic groove is provided at the bottom of the movable seat 3 and a magnet 6 is installed thereon. When the movable seat 3 rotates, the magnet 6 rotates with the movable seat 3. A circuit board 7 is provided below the movable seat 3. The circuit board is preferably an FPC board. A coil board 8 is provided on the circuit board 7. A coil is provided in the coil board 8 and powered by the circuit board 7. The coil corresponds to the magnet and, with the cooperation of the two, causes the movable seat to rotate (the coil is energized to generate a magnetic field and interacts with the magnet 6 to form the power to push the movable seat 3 to rotate).

[0069] Preferably, such as Figures 9 to 11 As shown, the lens aperture adjustment device 100 may further include a position sensor 9. The position sensor 9 is fixedly connected to the bottom of the circuit board 7, and before the drive assembly drives the movable seat 3 to rotate, the position sensor 9 is located below the end of the magnet 6 with the wedge-shaped inclined surface 61 to monitor the position of the magnet 6, thereby monitoring the rotation position of the movable seat 3, so as to adjust the aperture more accurately.

[0070] Here, the sensor 9 is positioned below the end of the magnet 6 with the wedge-shaped inclined surface 61. Since the magnetic field strength is more pronounced at different positions on the wedge-shaped inclined surface, the change in magnetic field detected by the position sensor 9 is clearer when the magnet 6 moves, thus improving the monitoring accuracy of the sensor 9 and further enhancing the accuracy of aperture adjustment. Preferably, the base 20 is provided with a clearance groove to allow for the installation of the position sensor 9. More preferably, a sensing capacitor 10 can also be fixedly connected below the circuit board 7, and this sensing capacitor 10 is positioned close to the position sensor 9 to further improve the accuracy of monitoring the position of the magnet 6.

[0071] like Figure 5 As shown, in an optional embodiment of this utility model, the fixed base 2 may include a base 20, a fixed protrusion 21, and a supporting protrusion 22. The fixed protrusions 21 are arranged in pairs and symmetrically on both sides of the edge of the base 20, and the top of each fixed protrusion 21 is fixedly connected to the edge of the top cover 1. The supporting protrusion 22 is disposed on the base 20 and arranged within the annular area formed by the fixed protrusions 21. The supporting protrusion 22 is fitted inside the movable base 3, and the upper surface of the supporting protrusion 22 is flush with the upper surface of the movable base 3.

[0072] In this embodiment, the base 20, the fixing protrusion 21 and the supporting protrusion 22 can be integrally formed to form the fixing seat 2;

[0073] The base 20 has a pair of symmetrically arranged fixing protrusions 21 on both sides of its edge; preferably, the top of the fixing protrusion 21 may be provided with a fixing post 211; for example Figure 12As shown, the top cover 11 has a fixing hole 11 on its edge. The position of the fixing hole 11 corresponds to the position of the fixing post 211 on the fixing protrusion 21. By cooperating with the fixing post 211, the top cover 1 is fixedly connected to the top of the fixing protrusion 21 and forms an active space to accommodate multiple blades 4, movable seats 3 and drive components. At the same time, the top cover 1 covers the blades 4, movable seats 3 and drive components, which can protect the components in the active space. Here, the number of fixing protrusions is not limited, as long as the top cover 1 can be stably fixed on the base 20 and cooperate with the fixing protrusion 21 to form an active space.

[0074] like Figure 5 As shown, in one feasible example, four fixed protrusions 21 are provided on the edge of the base 20. Among the four fixed protrusions, the current fixed protrusion and its adjacent fixed protrusion form a group, and the position is symmetrical with the other two fixed protrusions. The arrangement of the four fixed protrusions ensures that only the edge of the movable seat 3 contacts the fixed protrusions on the edge of the base 20 during the rotation process, so as to reduce the contact area between the movable seat 3 and the base 20.

[0075] In an optional embodiment of this utility model, the magnetic attraction assembly may include a first magnetic attraction assembly and a second magnetic attraction assembly. The first magnetic attraction assembly is disposed on the fixed base 2, and its position is opposite to that of the auxiliary rotating assembly; the second magnetic attraction assembly is disposed at the bottom of the fixed base 2.

[0076] In this embodiment, a first magnetic attraction force is generated between the first magnetic attraction component and the magnet 6, causing the movable seat 3 to move closer to the fixed seat 2. A second magnetic attraction force is generated between the second magnetic attraction component and the magnet 6, causing the movable seat 3 to move closer to the bottom of the fixed seat 2. This ensures the stability of the movable seat 3 during rotation, thereby ensuring the accuracy of aperture adjustment. Simultaneously, when the movable seat 3 rotates, the first attraction force causes one side of the outer wall of the movable seat 3 to contact the auxiliary rotation component. With the assistance of the auxiliary rotation component, the movable seat 3 can smoothly rotate around the fixed seat 2. Furthermore, the contact between one side of the outer wall of the movable seat 3 and the auxiliary rotation component also reduces the contact area between one side of the outer wall of the movable seat 3 and the fixed seat 2, thereby reducing the frictional force when the movable seat 3 rotates relative to the fixed seat 2 and avoiding affecting aperture adjustment.

[0077] In an optional embodiment of the present invention, the inner side of the fixed protrusion 21 is provided with a stepped structure, and the auxiliary rotating component is disposed in the stepped structure of a pair of fixed protrusions 21 located on one side of the base 20.

[0078] In this embodiment, the stepped structure on the fixed protrusion cooperates with the edge of the movable seat 3 to ensure the stability of the movable seat 3 during rotation.

[0079] Here, the stepped structure of the two fixed protrusions on one side has an auxiliary rotating component mounting slot for installing the auxiliary rotating component. The two fixed protrusions on the other side do not have auxiliary rotating components or corresponding mounting slots inside. The fixed protrusion with the auxiliary rotating component is positioned opposite the first magnetic component. Through the cooperation between the first magnetic component and the drive component, and the auxiliary rotating component in the two fixed protrusions on one side, the movable seat 3 can be assisted to rotate on the base 20. It is not necessary to set the auxiliary rotating component inside the two fixed protrusions on the other side, so as to reduce costs. In addition, the fixed protrusion with the auxiliary rotating component can reduce the contact area with the edge of the movable seat 3 through the auxiliary rotating component, thereby reducing the friction of the movable seat 3 when rotating.

[0080] like Figure 5 As shown, the third light-transmitting hole 222 at the center of the base 20 is formed on the support protrusion 22. The support protrusion 22 passes through the second light-transmitting hole 30 at the center of the movable seat 3 and is connected to the multiple blades 4. It should be noted that the upper surface of the movable seat 3 is flush with the upper surface of the support protrusion 22 to ensure the stability of the multiple blades 4 during rotation. Preferably, as shown... Figure 1 As shown, a wear-resistant pad 5 is provided between the top of the support protrusion 22 and the blade 4 to reduce wear between the support protrusion 22 and the blade 4; more preferably, as shown... Figure 15 As shown, the gasket 5 has a connection hole and a light-transmitting circular hole that match the structure of the support protrusion 22.

[0081] In an optional embodiment of the present invention, the auxiliary rotating component is a ball bearing 212 disposed in the stepped structure inside a pair of fixed protrusions 21 on one side of the edge of the base 20.

[0082] In this embodiment, the ball bearings 212 are installed in the auxiliary rotating component mounting slot on the stepped structure, while no ball bearings are installed on the inner side of the fixed protrusion on the other side. When the movable seat 3 rotates, under the action of the first attraction force generated by the first magnetic attraction component and the driving component and the second attraction force generated by the second magnetic attraction component and the driving component, the movable seat 3 generates a radial force in the direction of the two ball bearings 212 and presses downward on the ball bearings 212. This allows the movable seat 3 to rely entirely on these two ball bearings 212 to achieve the effect of auxiliary rotation when it moves, eliminating the need to install ball bearings in the stepped structure of the fixed protrusions on the other two sides, thus saving costs.

[0083] In an optional embodiment of this utility model, such as Figure 7As shown, the top of the movable base 3 is provided with multiple movable columns 31. The multiple movable columns 31 are arranged around the top of the movable base 3 and are movably connected to the other side of multiple blades 4 respectively. When the movable base 3 rotates, the movable columns 31 drive the blades to rotate around the fixed base 2, so that the size of the annular through hole formed by the multiple blades changes, thereby realizing the adjustment of the lens aperture.

[0084] In an optional embodiment of this utility model, such as Figure 8 As shown, the movable base 3 has limiting grooves 32 on its edge. The position and number of limiting grooves 32 correspond one-to-one with the fixed protrusions 21 on the edge of the base 20 to avoid the fixed protrusions 21 on the edge of the base 20. Here, the limiting grooves 33 correspond to the positions of the fixed protrusions on the edge of the base 20 to avoid the fixed protrusions.

[0085] Further, such as Figure 8 As shown, the limiting groove 32 is configured as a stepped structure, and a baffle protrusion 33 is provided at the bottom of the inner side of the limiting groove 32 located on one side of the movable seat 3. The baffle protrusion 33 is in contact with the auxiliary rotating component.

[0086] Here, the stepped structure of the limiting groove 32 cooperates with the stepped structure on the inner side of the fixed protrusion 21 to ensure the stability of the movable seat 3 during rotation; a baffle protrusion 33 is provided at the bottom of the inner side of the limiting groove 32 on one side of the movable seat 3, and the position of the baffle protrusion 33 corresponds to the position of the ball 212; the baffle protrusion 33 can block the side of the ball 212 on the one hand, and the baffle protrusion 33 contacts the inner side of the ball 212 (the outer side of the ball 212 contacts the auxiliary rotating component mounting groove) to reduce the contact area between the edge of the movable seat 3 and the fixed protrusion 21, thereby reducing the friction force when the movable seat 3 rotates relative to the fixed seat 2.

[0087] In an optional embodiment of this utility model, such as Figure 5 As shown, the top of the support protrusion 22 is provided with a plurality of pin posts 221, each of the plurality of pin posts 221 corresponding to one of the plurality of blades 4 and connected to one side of the corresponding blade by a pin.

[0088] In this embodiment, the pin 221 corresponds one-to-one with the blade 4, and each pin 221 is connected to a pin on one side of the corresponding blade, so that the movable seat 3 can drive the blade 4 to rotate around the pin 221 and rotate relative to the fixed seat 2.

[0089] In an optional embodiment of this utility model, such as Figure 1 and Figure 13As shown, adjacent blades of multiple blades 4 are staggered and overlapped, and each blade of multiple blades 4 has a pin hole 41 on one side that is connected to the pin of the pin column 221, and a movable hole 42 on the other side that is movably connected to the movable column 31. When the movable seat 3 rotates, the movable column 31 drives the blade to rotate around the pin column 221 to adjust the size of the aperture formed by the multiple blades 4.

[0090] In this embodiment, the pin hole 41 is opened on the inner side of the blade 4 and is pin-connected to the pin post 221 provided at the top of the support protrusion 22. The movable hole 42 is opened on the outer side of the blade 4 and is movably connected to the movable post 31 provided at the top of the movable seat 3. Preferably, the movable hole 42 is set as an arc-shaped elongated hole. When the blade 4 is connected to the movable seat 3, the movable post 31 is inserted into the arc-shaped elongated hole. When the drive assembly drives the movable seat 3 to rotate, since the inner side of the blade 4 is pin-connected to the pin post 221 through the pin hole 41, the movable post 31 will drive the blade 4 to rotate around the pin post 221 within the arc path size range corresponding to the movable hole 42. During the process of the movable seat 3 driving the blade to rotate, as the size of the arc path changes, the area of ​​the overlapping of two adjacent blades also changes. Furthermore, the size of the annular through hole formed by multiple blades also changes. When the size of the annular through hole changes, the size of the light beam after passing through the first light-transmitting hole 12 will also change, thereby realizing the blocking of the lens and the adjustment of the lens aperture.

[0091] In an optional embodiment of this utility model, such as Figure 5 As shown, the first magnetic attraction component is a side magnetic attraction piece 23 disposed on the other side of the support protrusion 22; as Figure 1 and Figure 16 As shown, the second magnetic component is an annular bottom magnetic plate 24 disposed at the bottom of the base 20.

[0092] In this embodiment, a side magnetic plate mounting groove is provided on the other side of the supporting protrusion 22 on the base 20, and a side magnetic plate 23 is installed. The side magnetic plate 23 is disposed on the opposite side of the fixed protrusion on which the ball 212 is installed. Preferably, the side magnetic plate 23 is a metal structure, which generates a first attraction force with the magnet 6. When the driving component drives the movable seat 3 to rotate around the supporting protrusion 22, the movable seat 3 moves closer to the ball 212 under the action of the first attraction force, and finally the baffle protrusion 33 at the bottom of the inner side of the limiting groove 32 on the edge of the movable seat 3 contacts the inner side of the ball 212. While the ball 212 assists the movable seat 3 to rotate, it can also reduce the contact area between the edge of the movable seat 3 and the fixed protrusion 21, thereby reducing the friction force when the movable seat 3 rotates relative to the fixed seat 2. At the same time, as Figure 4 and Figure 6As shown, a bottom magnetic plate mounting groove 25 is provided at the bottom of the base 20 and a bottom magnetic plate 24 is installed thereon. A second attraction force is generated between the bottom magnetic plate 24 and the magnet 6. The second attraction force causes the movable seat 3 to move downward and abut against the ball 212. Under the action of the first attraction force generated by the side magnetic plate 23 and the magnet 6 and the second attraction force generated by the bottom magnetic plate 24 and the magnet 6, the movable seat 3 generates a radial force in the direction of the two balls 212 and contacts the outer side of the balls 212 downward, so as to reduce the contact area between the outer edge of the movable seat 3 and the inner wall of the fixed protrusion 21, thereby reducing the friction force when the movable seat 3 rotates.

[0093] When setting up the magnetic absorbing plates, the side magnetic absorbing plates 23 and the bottom magnetic absorbing plates 24 can be installed by opening mounting slots at corresponding positions. Alternatively, the side magnetic absorbing plates 23 and the bottom magnetic absorbing plates 24 can be directly integrated into the base 20 during the design process and built into the base 20 during production, maintaining their positional relationship and eliminating the need for separate installation steps for the side magnetic absorbing plates 23 and the bottom magnetic absorbing plates 24. In the embodiments of this application, a side magnetic absorbing plate mounting slot is provided on the outer wall of the support protrusion 22. Preferably, the side magnetic absorbing plate mounting slot can be a constricted structure with its top end penetrating the end wall of the top of the support protrusion 22. During installation, the side magnetic absorbing plate 23 can be directly embedded into the side magnetic absorbing plate mounting slot from the top end of the side magnetic absorbing plate mounting slot to achieve the installation operation of the side magnetic absorbing plate 23.

[0094] The above-described embodiments of this utility model provide a lens aperture adjustment device 100, comprising a top cover 1, multiple blades 4, a movable seat 3, a drive assembly, and a fixed seat 2 arranged coaxially from top to bottom, forming a relatively compact overall structure. The top cover 1 has a fixed protrusion 21 fixedly connected to the edge of the fixed seat 2, forming a space to accommodate the multiple blades 4 and the movable seat 3. The movable seat 3 is rotatably mounted on the fixed seat 2, and the multiple blades 4 are arranged in a ring on the movable seat 3 and connected to both the fixed seat 2 and the movable seat 3. An auxiliary rotation assembly is provided inside the fixed protrusion 21 on one side of the fixed seat 2, and the fixed seat 2 is connected to the auxiliary rotation assembly. A first magnetic attraction component is provided at a relative position, and a second magnetic attraction component is provided at the bottom of the fixed base 2. When the driving component drives the movable base 3 and drives multiple blades 4 to rotate, under the action of the first attraction force generated by the first magnetic attraction component and the driving component and the second attraction force generated by the second magnetic attraction component and the driving component, one side of the outer wall of the movable base 3 contacts the auxiliary rotation component to assist the movable base 3 in rotating. At the same time, it can also reduce the contact area between one side of the outer wall of the movable base 3 and one side of the inner wall of the fixed base 2, thereby reducing the friction between the movable base 3 and the fixed base 2. This can ensure the stability of the overall structure during lens aperture adjustment and thus improve the accuracy of adjustment.

[0095] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A lens aperture adjustment device, characterized in that, It includes a top cover (1), multiple blades (4), a movable seat (3), a drive assembly, and a fixed seat (2) arranged coaxially from top to bottom. The edge of the top cover (1) is fixedly connected to the edge of the fixed seat (2) to form an active space for accommodating multiple blades (4) and the movable seat (3). The fixed seat (2) includes a base (20) and the base (20) is provided with a position sensor (9). The movable seat (3) is rotatably sleeved on the fixed seat (2), and a plurality of blades (4) are arranged in a ring on the movable seat (3) and are respectively connected to the fixed seat (2) and the movable seat (3); An auxiliary rotating component is provided on the inner side of the fixed base (2), and a magnetic attraction component is provided on the fixed base (2). The magnetic attraction component interacts with the magnet (6) with a wedge-shaped inclined surface in the driving component and generates an attraction force. The magnet (6) with a wedge-shaped inclined surface is arranged opposite to the position sensor (9). When the driving component drives the movable seat (3) and drives the multiple blades (4) to rotate, the adsorption force causes the outer wall of one side of the movable seat (3) to approach and contact the auxiliary rotating component, so as to assist in driving the movable seat (3) to rotate around the fixed seat (2).

2. The lens aperture adjustment device according to claim 1, characterized in that, The fixed base (2) includes: The base (20); Fixed protrusions (21), the fixed protrusions (21) are arranged in pairs and symmetrically on both sides of the edge of the base (20), and the top of the fixed protrusions (21) is fixedly connected to the edge of the top cover (1); and Supporting protrusion (22) is disposed on the base (20) and arranged in the annular area formed by the fixed protrusion (21). The supporting protrusion (22) is sleeved in the movable seat (3) and the upper end face of the supporting protrusion (22) is flush with the upper end face of the movable seat (3) and contacts the lower surface of the plurality of blades (4).

3. The lens aperture adjustment device according to claim 2, characterized in that, The inner side of the fixed protrusion (21) is provided with a stepped structure, and the auxiliary rotating component is disposed in the stepped structure of a pair of fixed protrusions (21) located on one side of the base (20).

4. The lens aperture adjustment device according to claim 3, characterized in that, The auxiliary rotating component is a ball bearing (212) in a stepped structure inside a pair of fixed protrusions (21) on one side of the edge of the base (20).

5. The lens aperture adjustment device according to claim 2, characterized in that, The top of the movable seat (3) is provided with a plurality of movable columns (31), which are arranged around the top of the movable seat (3) and are respectively movably connected to the other side of the plurality of blades (4); The movable seat (3) has a limiting groove (32) on its edge. The position and number of the limiting groove (32) correspond one-to-one with the fixed protrusion (21) on the edge of the base (20) to avoid the fixed protrusion (21).

6. The lens aperture adjustment device according to claim 5, characterized in that, The limiting groove (32) is configured as a stepped structure, and a baffle protrusion (33) is provided at the bottom of the inner side of the limiting groove (32) located on one side of the movable seat (3), and the baffle protrusion (33) is in contact with the auxiliary rotating component.

7. The lens aperture adjustment device according to claim 5, characterized in that, The top of the support protrusion (22) is provided with a plurality of pins (221), each of the plurality of pins (221) corresponding to one of the plurality of blades (4) and connected to one side of the corresponding blade by a pin.

8. The lens aperture adjustment device according to claim 7, characterized in that, The multiple blades (4) are stacked in an alternating manner, and each of the multiple blades (4) has a pin hole (41) on one side that is connected to the pin of the pin column (221), and an active hole (42) on the other side that is movably connected to the active column (31). When the active seat (3) rotates, the active column (31) drives the blades to rotate around the pin column (221) to adjust the size of the aperture formed by the multiple blades (4).

9. The lens aperture adjustment device according to claim 2, characterized in that, The magnetic attraction component includes: A first magnetic attraction component is disposed on the fixed base (2), and the position of the first magnetic attraction component is opposite to the position of the auxiliary rotating component; and The second magnetic component is disposed at the bottom of the fixing base (2).

10. The lens aperture adjustment device according to claim 9, characterized in that, The first magnetic attraction component is a side magnetic attraction piece (23) disposed on the other side of the support protrusion (22).

11. The lens aperture adjustment device according to claim 9, characterized in that, The second magnetic component is an annular bottom magnetic piece (24) disposed at the bottom of the base (20).

12. The lens aperture adjustment device according to claim 2, characterized in that, The driving component includes: A magnet (6) is installed at the bottom of the movable seat (3), and one end face of the magnet (6) is set as a wedge-shaped inclined surface (61). Circuit board (7), said circuit board (7) is disposed below the movable seat (3) and sleeved on the support protrusion (22); and Coil plate (8), the coil plate (8) is disposed on the circuit board (7) and sleeved on the support protrusion (22), a coil is disposed inside the coil plate (8), the circuit board (7) supplies power so that the coil inside the coil plate (8) interacts with the magnet (6) and generates a driving force to drive the movable seat (3) to rotate.

13. The lens aperture adjustment device according to claim 12, characterized in that, The position sensor (9) is fixedly connected to the bottom of the circuit board (7), and before the drive assembly drives the movable seat (3) to rotate, the position sensor (9) is located below the end of the magnet (6) with the wedge-shaped inclined surface (61).

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