An aperture device having a gap-eliminating structure

Abstract

The utility model provides a kind of aperture device with gap elimination structure, including fixed seat, carousel, adjusting vane and gap elimination structure, the carousel rotatably install at the fixed seat, the adjusting vane rotatably install on the fixed seat, to adjust aperture size by the rotation of the adjusting vane, cam groove is equipped on the adjusting vane, the carousel protrudes to form guide pillar to the cam groove, the gap elimination structure includes first magnet mounted on the adjusting vane and cooperating piece mounted on the fixed seat, the cooperating piece is installed near the first magnet, when the adjusting vane rotates, by the effect of the cooperating piece to the first magnet, to make the guide pillar adhere to the edge of the cam groove. Eliminate the gap distance between guide pillar and cam groove, improve the aperture hole shape precision that adjusting vane combination forms, to obtain better imaging quality and respond to the needs of different scenes.

Description

Technical Field

[0001] This utility model relates to the technical field of apertures, and specifically to an aperture device with a gap elimination structure. Background Technology

[0002] During aperture imaging, it is necessary to adjust the rotation of the blades. Due to the gap between the guide post and the cam groove on the blades, the shape of the aperture formed by the combination of the blades is not accurate enough. This results in a difference between the aperture formed by the actual blades and the designed aperture, making it impossible to obtain better image quality and meet the user's needs. Utility Model Content

[0003] This invention addresses one of the problems existing in the prior art to a certain extent. Therefore, one objective of this invention is to provide an aperture device with a gap elimination structure to improve the shape accuracy of the aperture formed by the adjustment blades.

[0004] The above objective is achieved through the following technical solution: An aperture device with a gap elimination structure includes a fixed base, a turntable, an adjusting blade, and a gap elimination structure. The turntable is rotatably mounted on the fixed base, and the adjusting blade is rotatably mounted on the fixed base to adjust the aperture size by rotating the adjusting blade. A cam groove is provided on the adjusting blade, and the turntable protrudes into the cam groove to form a guide post. The gap elimination structure includes a first magnet mounted on the adjusting blade and a mating member mounted on the fixed base. The mating member is installed near the first magnet. When the adjusting blade rotates, the action of the mating member on the first magnet causes the guide post to be pressed tightly against the edge of the cam groove.

[0005] As a further improvement of this utility model, the magnetic conductor is fixedly mounted on the fixed base, and the magnetic pole of the first magnet is at the end close to the magnetic conductor. When the adjusting blade rotates, the magnetic pole of the first magnet moves away from the magnetic conductor.

[0006] As a further improvement of this utility model, the mating component includes a second magnet, with the magnetic pole of the second magnet at the end close to the magnetic pole of the first magnet, and the same magnetic pole of the first magnet at the end away from the second magnet.

[0007] As a further improvement of this utility model, the first magnet is fixedly mounted on the adjusting blade. As a further improvement of this utility model, an avoidance groove is formed at the adjusting blade, and the mating part is disposed near the avoidance groove.

[0008] As a further improvement of this utility model, a guide groove is provided on the fixed base, and the guide post extends into the cam groove through the guide groove.

[0009] As a further improvement of this utility model, it also includes a motor, with gear teeth provided at the turntable and a gear provided at the motor shaft of the motor, the turntable being driven to rotate by the gear meshing with the gear teeth.

[0010] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model proposes an aperture device with a gap elimination structure, which eliminates the gap distance between the guide post and the cam groove, improves the accuracy of the aperture hole shape formed by the adjustment blades, thereby obtaining better imaging quality and meeting the needs of different scenarios. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of an aperture device with a gap elimination structure in Embodiment 1; Figure 2 This is a schematic diagram of the structure after adjusting the rotation of the blades in Embodiment 1; Figure 3 This is another structural schematic diagram of an aperture device with a gap elimination structure in Embodiment 1 (the four adjustment blades are omitted here). Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the motor and turntable in Embodiment 1; Figure 6 This is an exploded schematic diagram of an aperture device with a gap elimination structure in Embodiment 1; Figure 7 This is a schematic diagram of an aperture device with a gap elimination structure in Embodiment 2; Figure 8 yes Figure 7 Enlarged view of point B in the middle. Detailed Implementation

[0012] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0013] Example 1: like Figure 1-6An aperture device with a gap elimination structure 4 includes a fixed base 1, a turntable 2, an adjusting blade 3, and the gap elimination structure 4. The turntable 2 is rotatably mounted on the fixed base 1, and the adjusting blade 3 is rotatably mounted on the fixed base 1 to adjust the aperture size by rotating the adjusting blade 3. A cam groove 31 is provided on the adjusting blade 3, and the turntable 2 protrudes into the cam groove 31 to form a guide post 21. The gap elimination structure 4 includes a first magnet 41 mounted on the adjusting blade 3 and a mating member 42 mounted on the fixed base 1. The mating member 42 is installed near the first magnet 41. When the adjusting blade 3 rotates, the action of the mating member 42 on the first magnet 41 causes the guide post 21 to be tightly pressed against the edge of the cam groove 31.

[0014] This invention proposes an aperture device with a gap elimination structure 4. When the turntable 2 rotates, the guide post 21 protrudes from the cam groove 31, so that the rotation of the turntable 2 drives the blade to rotate. When the blade rotates, the action of the first magnet 41 by the mating part 42 ensures that the guide post 21 is always in close contact with one end edge 311 of the cam groove 31 during the rotation of the blade, thus eliminating the gap distance between the guide post 21 and the cam groove 31, improving the shape accuracy of the aperture hole 5 formed by the adjustment blades, thereby obtaining better imaging quality and meeting the needs of different scenarios.

[0015] In this embodiment, an aperture 5 is formed at the fixed base 1 and the turntable 2. When the blade rotates, it moves closer to the aperture 5, allowing adjustment of the aperture diameter 5. In this patent, when driving the adjusting blade 3 to rotate, the guide post 21 is pressed tightly against one end edge of the cam groove 31, eliminating the gap between the guide post 21 and the cam groove 31. This improves the accuracy of the aperture diameter 5 shape when the aperture diameter 5 decreases, resulting in better image quality and adaptability to different scenarios.

[0016] A fixing post 11 is provided on the fixing base 1, and the blade is rotatably connected to the fixing post 11. In this embodiment, the adjusting blade 3 rotates about the fixing post 11 as the axis.

[0017] In this embodiment, the first magnet 41 is fixedly mounted on the adjusting blade 3. Furthermore, in this embodiment, the fixing post 11 passes through the central hole of the first magnet 41.

[0018] In this embodiment, the mating component 42 includes a magnetic conductor, which is fixedly mounted on the fixing base 1, and the magnetic pole of the first magnet 41 is at the end close to the magnetic conductor.

[0019] When the adjusting blade 3 rotates, it drives the magnetic pole 411 of the first magnet 41 to move away from the magnetic conductor. Under the attraction between the magnetic conductor and the magnetic pole of the first magnet 41, the adjusting blade 3 is given a force in the direction of the magnetic conductor, so that when the adjusting blade 3 rotates, the guide post 21 is in close contact with the lower edge 311 of the cam groove 31.

[0020] The magnetic conductor is fixedly mounted on the fixed base 1, so the rotation of the adjusting blade 3 or the attraction of the first magnet 41 to the magnetic conductor will not cause the magnetic conductor to shift.

[0021] The first magnet 41 is fixedly mounted on the adjusting blade 3. Rotation of the adjusting blade 3 causes the first magnet 41 to rotate. Initially, the magnetic poles 411 (which can be either the N or S poles) of the first magnet 41 are aligned at a certain angle with one end of the magnetic conductor. As the adjusting blade 3 rotates, the magnetic poles of the first magnet 41 gradually move away from the magnetic conductor. The mutual attraction between the magnetic conductor and the magnetic poles of the first magnet 41 exerts a force on the adjusting blade 3 in the direction of the magnetic conductor. Since the rotation of the adjusting blade 3 is indirectly driven by the motor 6, the attraction between the magnetic conductor and the first magnet 41 does not stop the rotation of the adjusting blade 3, but it does exert a force on the adjusting blade 3 in the direction of the magnetic conductor.

[0022] There is a mutual attraction between the magnetic conductor and the first magnet 41, and the strongest attraction of the first magnet 41 to the magnetic conductor is at the magnetic pole of the first magnet 41.

[0023] During the creation of the cam groove 31, tolerances are unavoidable, meaning there may be a gap between the guide post 21 and the edge of the cam groove 31. Under the mutual attraction between the magnetic conductor and the first magnet 41, when the adjusting blade 3 rotates, it exerts a force in the direction of the magnetic conductor. At this time, the guide post 21 will be tightly against the lower edge of the cam groove 31, eliminating the tolerances caused by the manufacturing of the cam groove 31.

[0024] A clearance groove 32 is formed at the adjusting blade 3, and the mating component 42 is disposed near the clearance groove 32. The clearance groove 32 allows the mating component 42 to be closer to the first magnet 41, preventing the adjusting blade 3 from colliding with the mating component 42 during rotation.

[0025] In this embodiment, the clearance groove 32 is an arc-shaped clearance groove 32.

[0026] A guide groove 12 is provided on the fixed base 1, and the guide post 21 extends into the cam groove 31 through the guide groove 12.

[0027] It also includes a motor 6, with gear teeth 23 provided at the turntable 2, and a gear 61 provided at the motor shaft of the motor 6, which meshes with the gear teeth 23. The motor 6 drives the turntable 2 to rotate forward or backward.

[0028] When motor 6 rotates, the gear 61 of motor 6 meshes with the gear 23 of turntable 2, causing turntable 2 to rotate. When turntable 2 rotates, guide post 21 rotates along guide groove 12. Also, because guide post 21 protrudes from cam groove 31, it will drive adjusting blade 3 to rotate.

[0029] In this embodiment, there are five adjusting blades 3 on the fixed base 1.

[0030] Example 2: like Figure 7 , 8 In this embodiment, the mating component 42 includes a second magnet 422, with the magnetic pole of the second magnet 422 located at the end close to the first magnet 41, and the same magnetic pole of the first magnet 41 located at the end away from the second magnet 422.

[0031] In this embodiment, the N pole of the second magnet 422 is located at the end closest to the N pole of the first magnet 41, while the N pole of the first magnet 41 is located at the end furthest from the second magnet 422. When the adjusting blade 3 rotates, the N pole of the first magnet 41 rotates towards the N pole of the second magnet 422, causing a repulsive force to be generated between the first magnet 41 and the second magnet 422.

[0032] When the adjusting blade 3 rotates, the magnetic pole of the first magnet 41 (the same pole as the second magnet) moves closer to the magnetic pole of the second magnet 422. Under the repulsive force between the magnetic poles of the first magnet and the second magnet, the first magnet 41 (adjusting blade) has a force that moves away from the second magnet. That is, during the rotation (clockwise rotation) of the adjusting blade, a force is given to move the adjusting blade away from the second magnet (generating a counterclockwise rotation torque), so that the guide post 21 is in close contact with the lower edge 311 of the cam groove 31.

[0033] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. An aperture device with a gap elimination structure, characterized in that, The device includes a fixed base, a turntable, an adjusting blade, and a gap elimination structure. The turntable is rotatably mounted on the fixed base, and the adjusting blade is rotatably mounted on the fixed base to adjust the aperture size by rotating the adjusting blade. A cam groove is provided on the adjusting blade, and the turntable protrudes into the cam groove to form a guide post. The gap elimination structure includes a first magnet mounted on the adjusting blade and a mating component mounted on the fixed base. The mating component is installed near the first magnet. When the adjusting blade rotates, the action of the mating component on the first magnet causes the guide post to be pressed tightly against the edge of the cam groove.

2. The aperture device with a gap elimination structure according to claim 1, characterized in that, The mating component includes a magnetic conductor, which is fixedly mounted on the fixed base, and the magnetic pole of the first magnet is at the end close to the magnetic conductor. When the adjusting blade rotates, the magnetic pole of the first magnet moves away from the magnetic conductor.

3. The aperture device with a gap elimination structure according to claim 1, characterized in that, The mating component includes a second magnet, with the magnetic pole of the second magnet at the end closer to the first magnet, and the same magnetic pole of the first magnet at the end farther away from the second magnet.

4. The aperture device with a gap elimination structure according to claim 1, characterized in that, A fixed column is provided on the fixed base, and the adjusting blade is rotatably connected to the fixed column.

5. An aperture device with a gap elimination structure according to claim 1, characterized in that, The first magnet is fixedly mounted on the adjusting blade.

6. The aperture device with a gap elimination structure according to claim 1, characterized in that, An clearance groove is formed at the adjusting blade, and the mating component is disposed near the clearance groove.

7. An aperture device with a gap elimination structure according to claim 1, characterized in that, The fixed base is provided with a guide groove, and the guide post extends into the cam groove through the guide groove.

8. An aperture device with a gap elimination structure according to claim 1, characterized in that, It also includes a motor, with gear teeth on the turntable and a gear on the motor shaft, which meshes with the gear teeth to drive the turntable to rotate.

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