Lens aperture adjustment device

Abstract

The present invention provides a lens aperture adjustment device, which includes a top cover, a plurality of blades, a movable seat, a driving assembly and a fixed seat coaxially arranged from top to bottom; the edge of the top cover is fixedly connected to the edge of the fixed seat and forms a movable space for accommodating the blades and the movable seat; the movable seat is rotatably sleeved on the fixed seat, and a plurality of blades are annularly arranged on the movable seat and are respectively connected to the fixed seat and the movable seat; a convex assembly is arranged on the inner side of the fixed seat, a first magnetic attraction assembly is arranged at a position relative to the convex assembly on the fixed seat, and a second magnetic attraction assembly is arranged at the bottom thereof, and the first magnetic attraction assembly and the second magnetic attraction assembly respectively generate a first adsorption force and a second adsorption force with the driving assembly; when the driving assembly drives the movable seat and drives the blades to rotate, the outer wall of one side of the movable seat is brought into contact with the convex assembly under the action of the first adsorption force and the second adsorption force. The overall structure of the device provided by the present invention is compact, which ensures the overall stability of the device during the aperture adjustment process.

Description

Technical Field

[0001] The invention relates to the field of optical technology, in particular to a lens aperture adjustment device. Background Art

[0002] As for the camera aperture, in places with strong light, the camera can obtain a deeper depth of field and a sharper picture by reducing the aperture, and in places with insufficient light, the amount of light entering can be increased by increasing the aperture, so that a pure picture with higher exposure and lower noise can be obtained. In the field of electronic equipment, the camera of general electronic equipment cannot change the aperture size, so it is impossible to adapt to various shooting environments by changing the aperture. This has resulted in many electronic devices being overexposed outdoors in strong sunlight, and underexposed at night, with dark pictures, high noise, and loss of details. In addition, when using some existing aperture adjustment devices to adjust the aperture, it is often difficult to ensure the stability of the device itself during the adjustment process, and thus the accuracy of the aperture adjustment cannot be guaranteed. Summary of the invention

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

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A lens aperture adjustment device comprises a top cover, a plurality of blades, a movable seat, a driving assembly and a fixed seat which are coaxially arranged in sequence from top to bottom.

[0006] The edge of the top cover is fixedly connected to the edge of the fixed seat to form a movable space for accommodating a plurality of the blades and the movable seat;

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

[0008] A convex assembly is provided on the inner side of the fixing seat, a first magnetic attraction assembly is provided on the fixing seat at a position opposite to the convex assembly, and a second magnetic attraction assembly is provided at the bottom of the fixing seat;

[0009] When the driving component drives the movable seat and drives the multiple blades to rotate, under the action of the first adsorption force generated by the first magnetic attraction component and the driving component and the second adsorption force generated by the second magnetic attraction component and the driving component, the outer wall of one side of the movable seat contacts the convex hump component to reduce the contact area between the outer wall of one side of the movable seat and the inner wall of one side of the fixed seat.

[0010] In one embodiment, the fixing seat comprises:

[0011] Base;

[0012] Fixed protrusions, the fixed protrusions are arranged in pairs and symmetrically on both sides of the edge of the base, and the top ends of the fixed protrusions are 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 contacts with the lower surfaces of the plurality of blades.

[0014] In one embodiment, a step structure is provided inside the fixing protrusion, and a convex assembly mounting groove is provided in the step structure of a pair of fixing protrusions located on one side of the base, and the convex assembly is arranged in the convex assembly mounting groove.

[0015] In one embodiment, the convex assembly is a convex block, and two ends of the convex block are pre-buried in both sides of the inner wall of the convex assembly installation groove, and the inner side of the convex block abuts against the outer wall of one side of the movable seat.

[0016] In one embodiment, a gap is reserved between the outer side of the convex block and the inner wall of the convex assembly installation groove, and the installation gap cooperates with the two ends of the convex block to make the convex block have elasticity.

[0017] In one embodiment, the first magnetic attraction component is a side magnetic attraction sheet disposed on the other side of the supporting protrusion;

[0018] The second magnetic attraction component is an annular bottom magnetic attraction sheet arranged at the bottom of the base.

[0019] In one embodiment, the drive assembly comprises:

[0020] A magnet, the magnet being installed at the bottom of the movable seat;

[0021] A circuit board is disposed below the movable seat and sleeved on the supporting protrusion; and

[0022] The coil plate is arranged on the circuit board and sleeved on the supporting protrusion. A coil is arranged in the coil plate. The circuit board supplies power so that the coil in the coil plate interacts with the magnet and generates a driving force to drive the movable seat to rotate.

[0023] In one embodiment, a plurality of movable columns are arranged around the top of the movable seat, and the plurality of movable columns are movably connected to the other sides of the plurality of blades respectively;

[0024] An abutment groove is formed on one side edge of the movable seat, and the inner wall of the abutment groove contacts the inner side of the convex assembly in the fixed protrusion on one side edge of the base;

[0025] An avoidance groove is provided on the edge of the other side of the movable seat to avoid the fixed protrusion on the other side of the edge of the base.

[0026] In one embodiment, the abutment groove is configured as a stepped structure, and the stepped structure of the abutment groove cooperates with the stepped structure on the inner side of the fixing protrusion, so that the lower end stepped surface of the stepped structure of the abutment groove contacts the inner side of the convex assembly.

[0027] In one embodiment, two adjacent blades among the multiple blades are staggered and overlapped, and each of the multiple blades is provided with a pin shaft hole connected to the pin shaft at the top of the supporting protrusion on one side, and each blade is provided with a movable hole movably connected to the movable column on the other side. When the movable seat rotates, the movable column drives the blades to rotate around the fixed seat to adjust the size of the aperture hole formed by the multiple blade rings.

[0028] The above solution of the present invention includes at least the following beneficial effects:

[0029] The lens aperture adjustment device provided by the above scheme of the present invention comprises a top cover, a plurality of blades, a movable seat, a driving assembly and a fixed seat which are coaxially arranged in sequence from top to bottom, wherein the edge of the top cover is fixedly connected to the edge of the fixed seat and forms a movable space for accommodating the plurality of 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 to the fixed seat and the movable seat; a convex assembly is provided on the inner side of the fixed seat, a first magnetic attraction assembly is provided on the fixed seat at a position relative to the convex assembly, and a second magnetic attraction assembly is provided at the bottom of the fixed seat; when the driving assembly drives the movable seat and drives the plurality of blades to rotate, under the action of a first adsorption force generated by the first magnetic attraction assembly and the driving assembly and a second adsorption force generated by the second magnetic attraction assembly and the driving assembly, an outer wall on one side of the movable seat contacts with the convex assembly to reduce the contact area between the outer wall on one side of the movable seat and the inner wall on one side of the fixed seat, so as to reduce the friction between the movable seat and the fixed seat, thereby ensuring the overall stability of the device during the lens aperture adjustment process and thereby improving the accuracy of the adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an exploded diagram of a lens aperture adjustment device provided by an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of the three-dimensional structure of a lens aperture adjustment device provided by an optional embodiment of the present invention;

[0032] Figure 3 is a top view of a lens aperture adjustment device provided by an optional embodiment of the present invention;

[0033] Figure 4 is a cross-sectional view of a lens aperture adjustment device provided by an optional embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of a fixing base provided by an optional embodiment of the present invention;

[0035] Figure 6 is a schematic diagram of the three-dimensional structure of a fixing base provided by an optional embodiment of the present invention from another viewing angle;

[0036] Figure 7 is a schematic diagram of the three-dimensional structure of a fixing base provided by an optional embodiment of the present invention from another viewing angle;

[0037] Figure 8 It is a schematic diagram of the three-dimensional structure of a movable seat provided by an optional embodiment of the present invention;

[0038] Fig. 9 is a schematic diagram of the three-dimensional structure of a movable seat provided by an optional embodiment of the present invention from another perspective;

[0039] Fig.10 is a schematic diagram of a three-dimensional structure of a top cover provided by an optional embodiment of the present invention;

[0040] Fig.11 is a schematic diagram of a plurality of blades stacked in an alternate embodiment of the present invention;

[0041] Fig.12 is a schematic diagram of the three-dimensional structure of a circuit board provided by an optional embodiment of the present invention;

[0042] Fig.13 is a schematic diagram of the three-dimensional structure of a coil plate provided by an optional embodiment of the present invention;

[0043] Fig.14 is a schematic diagram of the three-dimensional structure of a gasket provided by an optional embodiment of the present invention;

[0044] Fig.15 It is a schematic diagram of the three-dimensional structure of a bottom magnetic sheet provided by an optional embodiment of the present invention;

[0045] Fig.16 It is a schematic diagram of a three-dimensional structure of the installation of a blade, a movable seat, a coil plate, a circuit board and a fixed seat provided by an optional embodiment of the present invention;

[0046] Fig.17It is a schematic diagram of the three-dimensional structure of the installation of a movable seat, a coil plate, a circuit board and a fixed seat provided by an optional embodiment of the present invention.

[0047] Description of Figure Numbers:

[0048] 100. Lens aperture adjustment device;

[0049] 1. Top cover: 11. Fixing hole; 12. First light hole;

[0050] 2. Fixed seat; 20. Base; 21. Fixed protrusion; 211. Fixed column; 212. Convex assembly mounting groove; 213. Convex block; 22. Support protrusion; 221. Pin column; 222. Side magnetic sheet mounting groove; 223. Third light hole; 23. Side magnetic sheet; 24. Bottom magnetic sheet; 25. Bottom magnetic sheet mounting groove;

[0051] 3. movable seat; 31. movable column; 32. avoidance groove; 33. abutment groove; 34. second light hole;

[0052] 4. Blade; 41. Pin hole; 42. Movable hole;

[0053] 5. Gasket; 6. Magnet; 7. Circuit board; 8. Coil board; 9. Position sensor. DETAILED DESCRIPTION

[0054] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0055] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0056] References throughout the specification to "one 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. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0057] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0058] like Figures 1 to 4 As shown, an embodiment of the present invention provides a lens aperture adjustment device 100, comprising a top cover 1, a plurality of blades 4, a movable seat 3, a driving assembly and a fixed seat 2 which are coaxially arranged from top to bottom. The edge of the top cover 1 is fixedly connected to the edge of the fixed seat 2 and forms a movable space for accommodating the plurality of blades 4 and the movable seat 3; the movable seat 3 is rotatably sleeved on the fixed seat 2, and the plurality of blades 4 are annularly arranged on the movable seat 3 and are respectively connected to the fixed seat 2 and the movable seat 3; a convex assembly is provided on the inner side of the fixed seat 2, a first magnetic attraction assembly is provided on the fixed seat 2 at a position opposite to the convex assembly, and a second magnetic attraction assembly is provided at the bottom of the fixed seat 2; the first magnetic attraction assembly generates a first adsorption force with the driving assembly, and the second magnetic attraction assembly generates a second adsorption force with the driving assembly. When the driving assembly drives the movable seat 3 and drives the plurality of blades 4 to rotate, under the action of the first adsorption force and the second adsorption force, the outer wall of one side of the movable seat 3 contacts the convex assembly to reduce the contact area between the outer wall of one side of the movable seat 3 and the inner wall of one side of the fixed seat 2.

[0059] In this embodiment, the top edge of the fixed seat 2 is fixedly connected to the top cover 1, and after the connection, a movable space is formed, and a plurality of blades 4, the movable seat 3 and the driving assembly are all arranged in the movable space; wherein the driving assembly is arranged below the movable seat 3, and drives the movable seat 3 to rotate around the fixed seat 2 in the cover movable space; a plurality of blades 4 are arranged in a ring above the fixed seat 2 and the movable seat 3, and are respectively connected to the fixed seat 2 and the movable seat 3;

[0060] Here, the fixing seat 2 is fixed on the housing of the lens motor, and the center positions of the fixing seat 2, the movable seat 3 and the top cover 1 all correspond to the lens on the lens motor; preferably, as Fig.10 As shown, a first light hole 12 is opened at the center of the top cover 1; Figure 8 As shown, a second light hole 34 is opened at the center of the movable seat 3; Figure 6 As shown, a third light hole 223 is opened at the center of the fixing base 2; Fig.11As shown, multiple blades 4 are overlapped with each other to form an annular through hole; when the top cover 1, multiple blades 4, the movable seat 3 and the fixed seat 2 are stacked, the first light hole 12, the annular through hole, the second light hole 34 and the third light hole 223 are coaxially stacked and form a lens avoidance hole for the lens motor, wherein the size of the annular through hole is greater than or equal to the size of the first light hole 12, and the first light hole 12 is the same size as the third light hole 223; when the driving component drives the movable seat 3 to rotate in the active space, the movable seat 3 drives one end of the multiple blades 4 to rotate, and the size of the annular through hole will change at this time. Since the annular through hole covers the second light hole 34 and the third light hole 223, when shooting, the light beam passes through the first light hole 12, the annular through hole and the third light hole 223 in sequence. When the size of the annular through hole changes, the size of the light beam after passing through the first light hole 12 will also change accordingly, thereby realizing the shielding of the lens and the adjustment of the lens aperture.

[0061] In actual application, since the central axis of the lens aperture adjustment device 100 is parallel to the horizontal line, in order to prevent the movable seat 3 from shaking when rotating on the fixed seat 2 and affecting the accuracy of the aperture adjustment, a first magnetic attraction component is arranged on the fixed seat 2 and at a relative position to the convex assembly, and a second magnetic attraction component is arranged at the bottom of the fixed seat 2; a first adsorption force is generated between the first magnetic attraction component and the driving component, so that the movable seat 3 approaches one side of the fixed seat 2, and a second adsorption force is generated between the second magnetic attraction component and the driving component, so that the movable seat 3 approaches the bottom of the base, so as to ensure the stability of the movable seat 3 when rotating, and further ensure the accuracy of the aperture adjustment; in addition, when the movable seat 3 rotates, the outer wall of one side of the movable seat 3 contacts the convex assembly on the inner side of the fixed seat 2 under the action of the first adsorption force and the second adsorption force, which can reduce the contact area between the outer wall of one side of the movable seat 3 and the inner wall of one side of the fixed seat 2, thereby reducing the friction when the movable seat 3 rotates relative to the fixed seat 2, avoiding affecting the lens aperture adjustment.

[0062] like Figure 5 and Figure 6 As shown, in an optional embodiment of the present invention, the fixed seat 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 the fixed protrusion 21 is fixedly connected to the edge of the top cover 1; the supporting protrusion 22 is arranged on the base 20 and arranged in the ring area formed by the fixed protrusion 21, and the supporting protrusion 22 is sleeved in the movable seat 3 and the upper end surface of the supporting protrusion 22 is flush with the upper end surface of the movable seat 3.

[0063] In this embodiment, the base 20, the fixing protrusion 21 and the supporting protrusion 22 can be integrally formed to form the fixing base 2;

[0064] The fixing protrusions 21 are symmetrically arranged in pairs on both sides of the edge of the base 20; preferably, a fixing column 211 may be arranged on the top of the fixing protrusion 21; Fig.10 As shown, a fixing hole 11 is opened at the edge of the top cover 1, and the position of the fixing hole 11 corresponds to the position of the fixing column 211 on the fixing protrusion 21. Through the cooperation of the fixing hole 11 and the fixing column 211, the top cover 1 is fixedly connected to the top of the fixing protrusion 21 and cooperates with the fixing protrusion 21 to form an activity space for accommodating multiple blades 4, movable seats 3 and drive components; at the same time, the top cover 1 covers the blades 4, the movable seat 3 and the drive assembly, which can protect the components in the activity space; here, the number of fixing protrusions is not limited, as long as it is ensured that the top cover 1 can be stably fixed on the base 20 and cooperate with the fixing protrusion 21 to form an activity space.

[0065] like Figure 5 and Figure 6 As shown, in an achievable example, four fixing protrusions 21 are arranged on the edge of the base 20, among which the current fixing protrusion and its adjacent fixing protrusion are a group, and are symmetrically positioned with the other two fixing protrusions to form a group; the arrangement of the four fixing protrusions enables only the edge of the movable seat 3 to contact the fixed protrusions 21 on the edge of the base 20 during the rotation of the movable seat 3, so as to reduce the contact area between the movable seat 3 and the base 20.

[0066] In an optional embodiment of the present invention, a stepped structure is provided on the inner side of the fixing protrusion 21 , and a convex assembly mounting groove 212 is provided in the stepped structure of a pair of fixing protrusions 21 located on one side of the base 20 , and the convex assembly is arranged in the convex assembly mounting groove 212 .

[0067] In this embodiment, the stepped structure inside the fixed protrusion cooperates with the edge of the movable seat 3 to ensure the stability of the movable seat 3 during the rotation process;

[0068] Here, a convex assembly installation groove 212 is provided in the stepped structure of the two fixed protrusions on one side to facilitate the installation of the convex assembly, and no convex assembly and corresponding installation groove are provided inside the two fixed protrusions on the other side. The fixed protrusion provided with the convex assembly is opposite to the position of the first magnetic assembly, and the mutual cooperation between the first magnetic assembly and the driving assembly and the convex assembly in the two fixed protrusions on one side can assist the movable seat 3 to rotate on the base 20, and there is no need to provide a convex assembly inside the two fixed protrusions on the other side to reduce costs; in addition, the fixed protrusion provided with the convex assembly can reduce the contact area with the edge of the movable seat 3 through the convex assembly provided therein, thereby reducing the friction of the movable seat 3 when rotating.

[0069] like Figure 6As shown, the third light-through hole 223 at the center of the base 20 is opened on the support protrusion 22, and the support protrusion 22 passes through the second light-through hole 34 at the center of the movable seat 3 and is connected to the plurality of blades 4; it should be known 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 plurality of blades 4 when rotating. Preferably, as Figure 1 As shown, a wear-resistant gasket 5 is provided between the top of the support protrusion 22 and the blade 4 to reduce the wear of the support protrusion 22 and the blade 4; more preferably, as Fig.14 As shown, the gasket 5 is provided with a connecting hole and a light-through circular hole that match the structure of the supporting protrusion 22 .

[0070] In an optional embodiment of the present invention, Fig. 9 As shown, an abutment groove 33 is provided on one side edge of the movable seat 3, and the inner wall of the abutment groove 33 contacts the inner side of the convex assembly in the fixed protrusion 21 on one side edge of the base 20, and an avoidance groove 32 is provided on the other side edge of the movable seat 3 to avoid the fixed protrusion 21 on the other side edge of the base 20. The abutment groove 33 corresponds to the position of the fixed protrusion on one side edge of the base 20 where the convex assembly is installed, and the avoidance groove 32 corresponds to the position of the fixed protrusion on the other side edge of the base 20 where the convex assembly is not installed; both the avoidance groove 32 and the abutment groove 33 can achieve avoidance of the fixed protrusion;

[0071] Furthermore, the abutment groove 33 is configured as a stepped structure, and the stepped structure of the abutment groove 33 cooperates with the stepped structure on the inner side of the fixed protrusion 21, so that the lower end step surface of the stepped structure of the abutment groove 33 contacts the inner side of the convex assembly (the outer side of the convex assembly contacts the convex assembly mounting groove 212) to reduce the contact area between the edge of the movable seat 3 and the fixed protrusion, thereby reducing the friction force when the movable seat 3 rotates relative to the base 20; preferably, a stepped protrusion can be provided on the avoidance groove 32 to cooperate with the fixed protrusion 21 on the other side of the edge of the base 20 to ensure the stability of the movable seat 3 during rotation.

[0072] In an optional embodiment of the present invention, Figure 5 and Figure 6 As shown, a plurality of pin shaft columns 221 are provided around the top of the support protrusion 22 , and each of the plurality of pin shaft columns 221 corresponds to one of the plurality of blades 4 and is connected to a pin shaft on one side of the corresponding blade.

[0073] In this embodiment, the pin shaft columns 221 correspond to the blades 4 one by one, and each pin shaft column 221 is respectively connected to a pin shaft on one side of the corresponding blade, so that the movable seat 3 can drive the blade 4 to rotate relative to the fixed seat 2 .

[0074] In an optional embodiment of the present invention, Figure 8As shown, a plurality of movable columns 31 are arranged on the top of the movable seat 3, and the plurality of movable columns 31 are movably connected with the other side of the plurality of blades 4 respectively; when the movable seat 3 rotates, the movable columns 31 drive the blades to rotate around the pin column 221, so that the size of the annular through hole formed by the plurality of blades changes, thereby realizing the adjustment of the lens aperture size.

[0075] In an optional embodiment of the present invention, the convex assembly is a convex block 213 , both ends of the convex block 213 are pre-buried in the inner walls of the convex assembly installation groove 212 , and the inner side of the convex block 213 abuts against the outer wall of one side of the movable seat 3 .

[0076] In this embodiment, the inner side of the convex block 213 can be set as an arc protrusion structure, which contacts the lower end step surface of the step structure of the abutment groove 33 opened on the edge of the movable seat 3, which can reduce the contact area between the edge of the movable seat 3 and the inner wall of the fixed protrusion 21, thereby reducing the friction force when it moves; during design, the two ends of the convex block 213 can be pre-embedded and installed in the convex component mounting groove 212, or they can be integrally formed with the inner wall of the convex component mounting groove 212 when the convex component mounting groove 212 is opened.

[0077] Here, the convex block 213 can be made of a variety of materials, preferably metal; the two ends of the convex block 213 can be set as a long strip structure and pre-buried in the two sides of the inner wall of the convex component mounting groove 212; preferably, an installation gap is reserved between the outer side of the convex block 213 and the inner wall of the convex component mounting groove 212, and the installation gap cooperates with the long strip structure at both ends of the convex block 213 to make the convex block 213 have elasticity. After the movable seat 3 is installed, the elasticity can make the abutment structure between the inner side of the convex block 213 and the abutment groove 33 on the edge of the movable seat 3 more stable, further ensuring the stability of the movable seat 3 during rotation.

[0078] In an optional embodiment of the present invention, the driving assembly includes a magnet 6, a circuit board 7 and a coil plate 8. Fig. 9 As shown, the magnet 6 is installed at the bottom of the movable seat 3; Figure 16 to Figure 17 As shown, the circuit board 7 is arranged below the movable seat 3 and sleeved on the support protrusion 22; the coil plate 8 is arranged on the circuit board 7 and sleeved on the support protrusion 22, and a coil is arranged 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.

[0079] In this embodiment, a magnet groove is provided at the bottom end of the movable seat 3 and a magnet 6 is installed. A circuit board 7 is provided under the movable seat 3, and the circuit board is preferably an FPC board. A coil plate 8 is provided on the circuit board 7. A coil is provided in the coil plate 8 and is powered by the circuit board 7. The coil corresponds to the magnet and the movable seat is ordered to rotate under the cooperation of the two (the coil is energized to generate a magnetic field and acts with the magnet 6 to form a driving force to drive the movable seat 3 to rotate).

[0080] Preferably, if Fig.12 As shown, a position sensor 9 is provided at the bottom of the circuit board 7, and the position sensor 9 can monitor the position of the magnet 6, thereby realizing the monitoring of the rotation position of the movable seat 3; more preferably, an avoidance groove is provided on the base 20 to avoid the installation of the position sensor 9.

[0081] In an optional embodiment of the present invention, Figure 6 As shown, the first magnetic attraction component is a side magnetic attraction sheet 23 disposed on the other side of the support protrusion 22; Figure 1 and Fig.15 As shown, the second magnetic attraction component is an annular bottom magnetic attraction sheet 24 disposed at the bottom of the base 20 .

[0082] In this embodiment, a side magnetic sheet installation groove 222 is opened on the other side of the supporting protrusion 22 on the base 20 and a side magnetic sheet 23 is installed. The side magnetic sheet 23 is arranged on the opposite side of the fixed protrusion on which the convex block 213 is installed; preferably, the side magnetic sheet 23 is a metal structure, which generates a first adsorption force between it and the magnet 6. When the driving component drives the movable seat 3 to rotate around the supporting protrusion 22, the movable seat 3 approaches the direction of the convex block 213 under the action of the first adsorption force, and finally the lower end step surface of the step structure of the abutment groove 33 on the edge of the movable seat 3 contacts the inner side of the convex block 213, so as to reduce the contact area between the edge of the movable seat 3 and the fixed protrusion, thereby reducing the friction force when the movable seat 3 rotates relative to the fixed seat 2; at the same time, Figure 7 As shown, a bottom magnetic sheet installation groove 25 is opened at the bottom of the base 20 and a bottom magnetic sheet 24 is installed. A second adsorption force is generated between the bottom magnetic sheet 24 and the magnet 6. The second adsorption force causes the movable seat 3 to move downward and abut against the convex block 213; under the action of the first adsorption force generated by the side magnetic sheet 23 and the magnet 6 and the second adsorption force generated by the bottom magnetic sheet 24 and the magnet 6, the movable seat 3 generates a radial force in the direction of the two convex blocks 213 and contacts downward with the outer side of the convex block 213 to reduce the contact area between the outer side of the edge of the movable seat 3 and the inner wall of the fixed protrusion 21, thereby reducing the friction when the movable seat 3 rotates.

[0083] When setting the magnetic sheet, the side magnetic sheet 23 and the bottom magnetic sheet 24 can be installed by opening installation grooves at the corresponding positions, or the side magnetic sheet 23 and the bottom magnetic sheet 24 can be directly formed into an integrated structure during design, and directly built into the fixing seat 2 during production of the fixing seat 2, and their positional relationship remains unchanged, so as to save the installation process of the side magnetic sheet 23 and the bottom magnetic sheet 24. In the embodiment of the present application, a side magnetic sheet installation groove 222 is set on the outer side wall of the support protrusion 22; Figure 6 As shown, preferably, the side magnetic sheet installation groove 222 is a tapered structure and the top end passes through the end wall of the top end of the supporting protrusion 22. During installation, the side magnetic sheet 23 can be directly embedded into the side magnetic sheet installation groove 222 from the top end of the side magnetic sheet installation groove 222 to realize the installation operation of the side magnetic sheet 23.

[0084] In an optional embodiment of the present invention, Figure 1 and Fig.11 As shown, two adjacent blades among the multiple blades 4 are staggered and overlapped, and a pin hole 41 connected to the pin at the top of the supporting protrusion 22 is opened on one side of each blade 4, and a movable hole 42 movably connected to the movable column 31 is opened on the other side of each blade. When the movable seat 3 rotates, the movable column 31 drives the blades to rotate around the fixed seat 2 to adjust the size of the aperture hole formed by the multiple blades 4.

[0085] In this embodiment, the pin hole 41 is opened on the inner side of the blade 4 and is pin-connected with the pin column 221 set at the top of the supporting protrusion 22, and the movable hole 42 is opened on the outer side of the blade 4 and is movably connected with the movable column 31 set at the top of the movable seat 3; preferably, the movable hole 42 is set as an arc-shaped long hole, and when the blade 4 is connected to the movable seat 3, the movable column 31 is inserted into the arc-shaped long hole. When the driving component drives the movable seat 3 to rotate, since the inner side of the blade 4 is pin-connected with the pin column 221 through the pin hole 41, at this time, the movable column 31 will drive the blade 4 to rotate around the pin column 221 within the size range of the arc path corresponding to the movable hole 42; in the process of the movable seat 3 driving the blade to rotate, as the size of the arc path changes, the area of ​​the interlaced overlap of the adjacent two blades also changes accordingly, and further, the size of the annular through hole formed by the multiple blades also changes accordingly. When the size of the annular through hole changes, the size of the light beam after passing through the first light hole 12 will also change accordingly, thereby realizing the blocking of the lens and the adjustment of the lens aperture.

[0086] The above-mentioned embodiment of the present invention provides a lens aperture adjustment device 100 which includes a top cover 1, a plurality of blades 4, a movable seat 3, a driving assembly and a fixed seat 2 which are coaxially arranged in sequence from top to bottom, forming an overall structure of a relatively compact lens aperture adjustment device; wherein the edge of the top cover 1 is fixedly connected to a fixed protrusion 21 on the edge of the fixed seat 2 and forms a movable space for accommodating the plurality of blades 4 and the movable seat 3; the movable seat 3 is rotatably sleeved on the fixed seat 2, and the plurality of blades 4 are annularly arranged on the movable seat 3 and are respectively connected to the fixed seat 2 and the movable seat 3; a convex bulge assembly is provided on the inner side of the fixed protrusion 21 on one side of the fixed seat 2, and the fixed seat 2 A first magnetic attraction component is provided at a position opposite to the convex assembly on the top, and a second magnetic attraction component is provided at the bottom of the fixed seat 2; when the driving component drives the movable seat 3 and drives the multiple blades 4 to rotate, under the action of the first adsorption force generated by the first magnetic attraction component and the driving component and the second adsorption force generated by the second magnetic attraction component and the driving component, the outer wall of one side of the movable seat 3 contacts with the convex assembly to reduce the contact area between the outer wall of one side of the movable seat 3 and the inner wall of one side of the fixed seat 2, thereby reducing the friction between the movable seat 3 and the fixed seat 2, which can ensure the stability of the overall structure during the lens aperture adjustment process, thereby improving the accuracy of the adjustment.

[0087] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lens aperture adjustment device, characterized in that: It includes a top cover, a plurality of blades, a movable seat, a driving assembly and a fixed seat which are coaxially arranged in sequence from top to bottom, wherein The edge of the top cover is fixedly connected to the edge of the fixed seat to form a movable space for accommodating a plurality of the blades and the movable seat; The movable seat is rotatably sleeved on the fixed seat, and a plurality of blades are annularly arranged on the movable seat and are respectively connected to the fixed seat and the movable seat; A convex assembly is provided on the inner side of the fixing seat, a first magnetic attraction assembly is provided on the fixing seat at a position opposite to the convex assembly, and a second magnetic attraction assembly is provided at the bottom of the fixing seat; the convex assembly is a convex block; When the driving component drives the movable seat and drives the plurality of blades to rotate, under the action of the first adsorption force generated by the first magnetic attraction component and the driving component and the second adsorption force generated by the second magnetic attraction component and the driving component, the outer wall of one side of the movable seat contacts the convex hump component to reduce the contact area between the outer wall of one side of the movable seat and the inner wall of one side of the fixed seat; Wherein, the fixing seat comprises: Base; A fixing protrusion, the fixing protrusions are arranged in pairs and symmetrically on both sides of the edge of the base, and the top of the fixing protrusion is fixedly connected to the edge of the top cover; a step structure is provided on the inner side of the fixing protrusion, and a convex assembly mounting groove is opened in the step structure of a pair of fixing protrusions located on one side of the base; two ends of the convex block are embedded in both sides of the inner wall of the convex assembly mounting groove, the inner side of the convex block abuts against the outer wall of one side of the movable seat, and an installation gap is reserved between the outer side of the convex block and the inner wall of the convex assembly mounting groove, and the installation gap cooperates with the two ends of the convex block to make the convex block have elasticity.

2. The lens aperture adjustment device according to claim 1, characterized in that: The fixed seat also includes a supporting protrusion, which is arranged on the base and arranged in the annular area formed by the fixed protrusion. The supporting protrusion is sleeved in the movable seat and the upper end surface of the supporting protrusion is flush with the upper end surface of the movable seat and contacts with the lower surfaces of the plurality of blades.

3. The lens aperture adjustment device according to claim 2, characterized in that: The first magnetic attraction component is a side magnetic attraction sheet arranged on the other side of the supporting protrusion; The second magnetic attraction component is an annular bottom magnetic attraction sheet arranged at the bottom of the base.

4. The lens aperture adjustment device according to claim 2, characterized in that: The drive assembly comprises: A magnet, the magnet being installed at the bottom of the movable seat; A circuit board is disposed below the movable seat and sleeved on the supporting protrusion; and The coil plate is arranged on the circuit board and sleeved on the supporting protrusion. A coil is arranged in the coil plate. The circuit board supplies power so that the coil in the coil plate interacts with the magnet and generates a driving force to drive the movable seat to rotate.

5. The lens aperture adjustment device according to claim 3, characterized in that: A plurality of movable columns are arranged around the top of the movable seat, and the plurality of movable columns are movably connected to the other sides of the plurality of blades respectively; An abutment groove is formed on one side edge of the movable seat, and the inner wall of the abutment groove contacts the inner side of the convex assembly in the fixed protrusion on one side edge of the base; An avoidance groove is provided on the edge of the other side of the movable seat to avoid the fixed protrusion on the other side of the edge of the base.

6. The lens aperture adjustment device according to claim 5, characterized in that: The abutment groove is configured as a stepped structure, and the stepped structure of the abutment groove matches the stepped structure on the inner side of the fixing protrusion, so that the stepped surface at the lower end of the stepped structure of the abutment groove contacts the inner side of the convex assembly.

7. The lens aperture adjustment device according to claim 5, characterized in that: Two adjacent blades among the multiple blades are staggered and overlapped, and one side of each blade is provided with a pin shaft hole connected to the pin shaft at the top of the supporting protrusion, and the other side of each blade is provided with a movable hole movably connected to the movable column. When the movable seat rotates, the movable column drives the blades to rotate around the fixed seat to adjust the size of the aperture hole formed by the multiple blade rings.

Images