Blade assembly of automatic aperture

Abstract

The utility model discloses a blade assembly of an automatic aperture, the automatic aperture comprises a fixed base, a fixed cover plate and a blade driving assembly, and a blade accommodating cavity is formed between the fixed base and the fixed cover plate; a blade assembly of the automatic aperture is arranged in a blade containing cavity and comprises a driving ring and a plurality of rotary blades located above the driving ring, and a blade driving assembly is in driving connection with the driving ring; each rotary blade is provided with a pivoting hole and a long hole; the fixed base is respectively provided with a pivoting shaft part protruding out of the bottom surface of the blade accommodating cavity corresponding to the pivoting hole of each rotary blade, and each pivoting shaft part is respectively embedded and inserted into the pivoting hole of the corresponding rotary blade; the upper surface of the driving ring is provided with driving columns protruding upwards corresponding to the rotary blades, and the driving columns are inserted into the long holes of the corresponding rotary blades in an embedded mode. By means of the structural design, the diaphragm has the advantages of being novel in structural design and capable of effectively improving the light flux control precision of the diaphragm.

Description

Technical Field

[0001] This utility model relates to the field of aperture technology, and in particular to a blade assembly for an automatic aperture. Background Technology

[0002] The Chinese utility model patent with patent number ZL202023145302.8 and patent name, entitled "A Novel Aperture and Shutter Combination Structure," essentially discloses an automatic aperture. Specifically, the novel aperture and shutter combination structure includes a fixed base and a fixed cover plate mounted on the upper end of the fixed base. A blade receiving cavity is formed between the fixed base and the fixed cover plate. A base light-transmitting hole is opened in the middle of the fixed base, which is completely penetrating vertically and communicating with the blade receiving cavity. A cover plate light-transmitting hole is opened in the middle of the fixed cover plate, which is completely penetrating vertically and communicating with the blade receiving cavity. The base light-transmitting hole and the cover plate light-transmitting hole are aligned. An upper movable blade and a lower movable blade located below the upper movable blade are embedded in the blade receiving cavity and move synchronously in opposite directions. A blade driving assembly is installed at the right end of the fixed base, which drives the upper and lower movable blades to move synchronously in opposite directions.

[0003] When the aforementioned novel aperture and shutter combination structure is used as an aperture, the upper and lower movable blades of the blade drive assembly move synchronously in opposite directions, thereby keeping the upper and lower movable blades within a specified aperture area to achieve aperture light transmission control.

[0004] It should be noted that the aforementioned new aperture-shutter combination structure still has the following drawbacks: Specifically, the aperture light transmission is controlled by the translational movement of the upper and lower blades. When the upper and lower blades move closer together, the aperture light transmission decreases; when they move further apart, the aperture light transmission increases. However, this translational double-blade structure suffers from low precision in aperture light transmission control. Utility Model Content

[0005] The purpose of this invention is to provide an automatic aperture blade assembly that addresses the shortcomings of existing technologies. This automatic aperture blade assembly has a novel structural design and can effectively improve the control accuracy of the aperture's light transmission.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0007] An automatic aperture blade assembly includes a fixed base, a fixed cover plate mounted on the upper end of the fixed base, and a blade drive assembly mounted on the fixed base. A blade receiving cavity is formed between the fixed base and the fixed cover plate. The fixed base has a vertically penetrating base light-transmitting hole, and the fixed cover plate has a vertically penetrating cover plate light-transmitting hole aligned with the base light-transmitting hole.

[0008] The blade assembly of the automatic aperture is installed inside the blade receiving cavity;

[0009] The blade assembly of the automatic aperture includes a drive ring rotatably mounted on a fixed base and several rotating blades located above the drive ring. The blade drive assembly is drivenly connected to the drive ring.

[0010] Each rotating blade has a vertically penetrating pivot hole and an elongated hole located beside the pivot hole;

[0011] The fixed base is provided with a pivot shaft protruding from the bottom surface of the blade receiving cavity for each pivot hole corresponding to the rotating blade, and each pivot shaft is respectively inserted into the pivot hole of the corresponding rotating blade.

[0012] The upper surface of the drive ring is provided with upward protruding drive posts corresponding to each rotating blade, and each drive post is inserted into the elongated hole of the corresponding rotating blade.

[0013] The fixed base has an annular groove in the bottom surface of the blade receiving cavity, which is circular and surrounds the light-transmitting hole of the base. The drive ring is rotated and embedded in the annular groove.

[0014] The edge of the drive ring is provided with an outwardly protruding drive part, which is an integral structure with the drive ring. The blade drive assembly is drivenly connected to the drive part.

[0015] The drive column and the drive ring are an integral structure.

[0016] The pivot shaft and the fixed base are an integral structure.

[0017] The fixing cover plate is fastened to the upper end of the fixing base.

[0018] Compared with existing technologies, this invention has the following advantages: Specifically, the automatic aperture blade assembly achieves aperture light transmission control and adjustment through the synchronous rotation of several rotating blades. Compared with the existing translational double-blade structure, the blade assembly of this invention can effectively improve the accuracy of automatic aperture light transmission control and adjustment. Therefore, the automatic aperture blade assembly of this invention has the advantages of novel structural design and effective improvement in aperture light transmission control accuracy. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0020] Figure 1 This is an exploded view of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of this utility model.

[0022] exist Figure 1 and Figure 2 This includes:

[0023] 1-Fixed base; 11-Base light-transmitting hole; 12-Annular groove; 2-Fixed cover plate; 21-Cover plate light-transmitting hole; 3-Blade drive assembly; 4-Blade receiving cavity; 5-Drive ring; 51-Drive column; 52-Drive part; 6-Rotating blade; 61-Pivot hole; 62-Elongated hole; 7-Pivot shaft part. Detailed Implementation

[0024] The present invention will now be described in conjunction with specific embodiments.

[0025] Example 1, as Figure 1 and Figure 2 As shown, an automatic aperture blade assembly includes a fixed base 1, a fixed cover plate 2 mounted on the upper end of the fixed base 1, and a blade drive assembly 3 mounted on the fixed base 1. A blade receiving cavity 4 is formed between the fixed base 1 and the fixed cover plate 2. The fixed base 1 has a vertically penetrating base light-transmitting hole 11, and the fixed cover plate 2 has a vertically penetrating cover plate light-transmitting hole 21 aligned with the base light-transmitting hole 11. It should be explained that in this embodiment, the fixed cover plate 2 is fastened to the upper end of the fixed base 1, that is, the fixed cover plate 2 is assembled to the upper end of the fixed base 1 by a fastening method; of course, the above assembly connection method does not constitute a limitation on this embodiment, that is, the fixed cover plate 2 in this embodiment can also be assembled to the upper end of the fixed base 1 by screwing or other methods.

[0026] Among them, such as Figure 1 and Figure 2 As shown, the blade assembly of the automatic aperture is installed in the blade receiving cavity 4, and the blade assembly of the automatic aperture includes a drive ring 5 rotatably mounted on the fixed base 1 and a plurality of rotating blades 6 located above the drive ring 5. The blade drive assembly 3 is drivenly connected to the drive ring 5.

[0027] Furthermore, such as Figure 1 and Figure 2 As shown, each rotating blade 6 has a vertically penetrating pivot hole 61 and an elongated hole 62 located beside the pivot hole 61.

[0028] Furthermore, such as Figure 1 and Figure 2As shown, the fixed base 1 is provided with a pivot shaft portion 7 protruding from the bottom surface of the blade receiving cavity 4 for each pivot hole 61 corresponding to each rotating blade 6. Each pivot shaft portion 7 is respectively inserted into the pivot hole 61 of the corresponding rotating blade 6. It should be explained that the pivot shaft portion 7 in this embodiment can be designed as an integral structure or as a separate structure. For the pivot shaft portion 7 with an integral structure design, the pivot shaft portion 7 and the fixed base 1 are an integral structure. For the pivot shaft portion 7 with a separate structure design, the pivot shaft portion 7 can be assembled to the fixed base 1 by plugging or screwing.

[0029] In addition, such as Figure 1 and Figure 2 As shown, the upper surface of the drive ring 5 is provided with an upwardly protruding drive post 51 corresponding to each rotating blade 6, and each drive post 51 is inserted into the elongated hole 62 of the corresponding rotating blade 6. It should be explained that the drive post 51 in this embodiment adopts an integrated structure design, that is, the drive post 51 and the drive ring 5 are an integral structure.

[0030] It should be noted that the blade drive assembly 3 in this embodiment has already been disclosed in the prior art; the blade drive assembly 3 can directly adopt the blade drive assembly 3 disclosed in the Chinese utility model patent with patent number ZL202023145302.8 and patent name: a new type of aperture shutter combination structure. Specifically, the drive swing arm of the blade drive assembly 3 is driven to connect with the drive ring 5.

[0031] It should be further pointed out that, such as Figure 1 and Figure 2 As shown, the number of rotating blades 6 can be four; of course, the number of rotating blades 6 can also be three, five, six, seven, etc.

[0032] In this embodiment, when the blade assembly is in operation, the blade drive assembly 3 drives the drive ring 5 to rotate relative to the fixed base 1. Since each rotating blade 6 is pivotally mounted on the fixed base 1 through a pivot hole 61 and a corresponding pivot shaft 7, during the rotation of the drive ring 5, the drive ring 5 drives each rotating blade 6 to rotate synchronously through each drive column 51, thereby controlling and adjusting the amount of light transmitted through the light-transmitting hole 11 of the base and the light-transmitting hole 21 of the cover plate. Specifically, when each rotating blade 6 rotates outward, the amount of light transmitted through the automatic aperture increases; when each rotating blade 6 rotates inward, the amount of light transmitted through the automatic aperture decreases.

[0033] It should be emphasized that the automatic aperture blade assembly of this embodiment achieves the control and adjustment of the aperture light transmission through the synchronous rotation of several rotating blades 6. Compared with the translational double blade structure in the prior art, the blade assembly of this embodiment can effectively improve the accuracy of the automatic aperture light transmission control and adjustment.

[0034] In summary, the blade assembly of the automatic aperture in this embodiment has the advantages of novel structural design and effective improvement of aperture light transmission control accuracy through the above structural design.

[0035] Example 2, as Figure 1 and Figure 2 As shown, the difference between this embodiment 2 and embodiment 1 is that: the fixed base 1 has an annular groove 12 in the shape of a ring and surrounding the light-transmitting hole 11 of the base on the bottom surface of the blade receiving cavity 4, and the driving ring 5 is rotated and embedded in the annular groove 12.

[0036] The drive ring 5 has an outwardly protruding drive part 52 at its edge. The drive part 52 and the drive ring 5 are an integral structure. The blade drive assembly 3 is drivenly connected to the drive part 52.

[0037] In this second embodiment, the annular groove 12 is formed on the fixed base 1, which can enable the drive ring 5 to be installed quickly and accurately, and can effectively ensure the rotational freedom of the drive ring 5.

[0038] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An automatic aperture blade assembly, the automatic aperture comprising a fixed base (1), a fixed cover plate (2) mounted on the upper end of the fixed base (1), and a blade drive assembly (3) mounted on the fixed base (1), wherein a blade receiving cavity (4) is formed between the fixed base (1) and the fixed cover plate (2), the fixed base (1) is provided with a vertically penetrating base light-transmitting hole (11), and the fixed cover plate (2) is provided with a vertically penetrating cover plate light-transmitting hole (21) aligned with the base light-transmitting hole (11); The blade assembly of the automatic aperture is installed in the blade receiving cavity (4); Its features are: The blade assembly of the automatic aperture includes a drive ring (5) rotatably mounted on a fixed base (1) and several rotating blades (6) located above the drive ring (5). The blade drive assembly (3) is drivenly connected to the drive ring (5). Each rotating blade (6) is provided with a vertically penetrating pivot hole (61) and an elongated hole (62) located beside the pivot hole (61). The fixed base (1) is provided with a pivot shaft (7) protruding from the bottom surface of the blade receiving cavity (4) for each pivot hole (61) corresponding to each rotating blade (6), and each pivot shaft (7) is inserted into the pivot hole (61) of the corresponding rotating blade (6). The upper surface of the drive ring (5) is provided with an upward protruding drive post (51) corresponding to each rotary blade (6), and each drive post (51) is inserted into the elongated hole (62) of the corresponding rotary blade (6).

2. The blade assembly of an automatic aperture according to claim 1, characterized in that: The fixed base (1) has an annular groove (12) in the shape of a ring and surrounding the light-transmitting hole (11) of the base on the bottom surface of the blade receiving cavity (4). The driving ring (5) is rotatably fitted into the annular groove (12). The edge of the drive ring (5) is provided with a drive part (52) that protrudes outward. The drive part (52) and the drive ring (5) are an integral structure. The blade drive assembly (3) is drivenly connected to the drive part (52).

3. The blade assembly of an automatic aperture according to claim 1, characterized in that: The drive column (51) and the drive ring (5) are an integral structure.

4. The blade assembly of an automatic aperture according to claim 1, characterized in that: The pivot shaft (7) and the fixed base (1) are an integral structure.

5. The blade assembly of an automatic aperture according to claim 1, characterized in that: The fixed cover plate (2) is fastened to the upper end of the fixed base (1).

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