A novel in-lens shutter structure

Abstract

This utility model discloses a novel in-lens shutter structure, comprising a lower fixed base and an upper cover plate. A middle partition plate, a first upper blade located on the upper side of the middle partition plate, and a first lower blade located on the lower side of the middle partition plate are installed within the blade receiving cavity. A blade driving assembly is installed on the lower fixed base, including a crank. The first upper blade and the first lower blade rotate synchronously in opposite directions under the drive of the crank. A second upper blade, stacked with the first upper blade, is installed on the upper side of the middle partition plate, and a second lower blade, stacked with the first lower blade, is installed on the lower side of the middle partition plate. The first upper blade and the second upper blade are staggered, and the first lower blade and the second lower blade are also staggered. The second upper blade and the second lower blade rotate synchronously in opposite directions under the drive of the crank. This utility model has the advantages of novel structural design and fast closing speed, and can effectively reduce the distortion of object shape when shooting high-speed moving objects or rapid panning.

Description

Technical Field

[0001] This utility model relates to the field of shutter technology, and in particular to a novel in-lens shutter structure. Background Technology

[0002] The function of the shutter is to control the length of time that light shines on the camera's image sensor (film or image sensor), that is, to control the exposure time, which is called shutter speed.

[0003] The Chinese utility model patent with patent number ZL202420030055.6 and patent name is "A high-speed shutter between lenses". It specifically discloses the following technical solution: a high-speed shutter between lenses, including a fixed cover and a fixed seat that is fastened to the fixed cover. A blade drive assembly consisting of a U-shaped iron, a winding shaft, a coil, a crank handle, and a permanent magnet is installed between the fixed cover and the fixed seat. The crank handle is provided with a lower blade and an upper blade arranged at intervals. The upper blade and the lower blade are separated by a partition.

[0004] When the above-mentioned high-speed shutter is working, the coil is energized by the wire, which causes the magnetic field generated by the U-shaped iron to interact with the magnetic field of the permanent magnet, causing the crank to rotate, which in turn causes the lower and upper blades to swing. By setting a partition, the upper and lower blades can be prevented from touching each other.

[0005] It should be noted that the above-mentioned high-speed shutter still has the following defects: Specifically, the high-speed shutter has only one upper blade and one lower blade, which together form a blade group, and the upper blade and the lower blade are separated by a partition; when the blade drive assembly drives the upper blade and the lower blade to rotate synchronously and close, the blade group structure composed of one upper blade and one lower blade has the problem of slow closing speed, that is, it is easy to cause the shape distortion of the object (jelly effect) when shooting fast moving objects or fast panning. Utility Model Content

[0006] The purpose of this invention is to provide a novel in-lens shutter structure that addresses the shortcomings of existing technologies. This novel in-lens shutter structure has a novel design, fast closing speed, and can effectively reduce the distortion of object shape when shooting high-speed moving objects or rapidly panning.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0008] A novel in-lens shutter structure includes a lower fixed base and an upper cover plate mounted on the upper end of the lower fixed base. A blade receiving cavity is formed between the lower fixed base and the upper cover plate. The lower fixed base has a vertically penetrating fixed base light-transmitting hole, and the upper cover plate has a vertically penetrating cover plate light-transmitting hole aligned with the fixed base light-transmitting hole.

[0009] The blade receiving cavity is equipped with a middle partition plate, a first upper blade located on the upper side of the middle partition plate, and a first lower blade located on the lower side of the middle partition plate. The first upper blade and the first lower blade cooperate to form a first blade group. The middle partition plate has a vertical through-hole that is aligned with the light-transmitting hole of the fixing seat and the light-transmitting hole of the cover plate, respectively.

[0010] The lower fixed base is equipped with a blade drive assembly, which includes a rocker arm. The first upper blade and the first lower blade of the first blade group rotate synchronously in opposite directions under the drive of the rocker arm.

[0011] The upper side of the middle partition is equipped with a second upper blade stacked with the first upper blade, and the lower side of the middle partition is equipped with a second lower blade stacked with the first lower blade. The second upper blade and the second lower blade cooperate to form a second blade group.

[0012] The first upper blade and the second upper blade are staggered, and the first lower blade and the second lower blade are staggered.

[0013] The second upper blade and the second lower blade of the second blade group rotate synchronously in opposite directions under the drive of the crank handle.

[0014] The crank handle is provided with a vertically arranged drive shaft that extends into the blade receiving cavity.

[0015] The lower fixing seat is provided with a blade pivot on the bottom surface of the blade receiving cavity corresponding to the first upper blade, the first lower blade, the second upper blade, and the second lower blade. The first upper blade, the first lower blade, the second upper blade, and the second lower blade are respectively provided with pivot holes. The first upper blade, the first lower blade, the second upper blade, and the second lower blade are respectively pivotally connected to the corresponding blade pivot through the pivot holes.

[0016] The first upper blade, the first lower blade, the second upper blade, and the second lower blade are each provided with a vertical through-hole, and the drive shaft of the crank passes through the through-hole of the first upper blade, the first lower blade, the second upper blade, and the second lower blade.

[0017] The blade pivot and the lower fixed seat are an integral structure.

[0018] The edge of the intermediate partition is fitted between the lower fixing seat and the upper cover plate.

[0019] The lower surface of the lower fixing base is provided with a recessed groove that communicates with the light transmission hole of the fixing base. An IR filter is embedded in the recessed groove and is fixed in the recessed groove by adhesive.

[0020] The upper cover plate is fastened to the lower fixed seat.

[0021] Compared with the prior art, this utility model has the following beneficial effects: Specifically, this utility model has two blade groups, namely a first blade group and a second blade group. Under the drive of the crank of the blade drive assembly, the first blade group and the second blade group move synchronously. During the closing action, the first upper blade and the first lower blade of the first blade group rotate in opposite directions and move closer together to close, and the second upper blade and the second lower blade of the second blade group rotate in opposite directions and move closer together to close. Because the first upper blade and the second upper blade are staggered and the first lower blade and the second lower blade are staggered, compared with the single-blade group structure design in the prior art, the novel in-lens shutter structure of this embodiment has a faster closing speed. Therefore, this utility model has the advantages of novel structural design and fast closing speed, and can effectively reduce the distortion of object shape when shooting high-speed moving objects or rapid panning. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is an exploded view of the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0026] exist Figures 1 to 3 This includes:

[0027] 1-Lower fixing seat; 11-Fixed seat light transmission hole; 12-Blade pivot; 13-Sinking groove; 2-Upper cover plate; 21-Cover plate light transmission hole; 3-Blade receiving cavity; 4-Middle partition plate; 41-Partition plate light transmission hole; 51-First upper blade; 52-First lower blade; 53-Second upper blade; 54-Second lower blade; 55-Pivot hole; 56-Elongated hole; 6-Blade drive assembly; 61-Handle; 611-Drive shaft; 7-IR filter. Detailed Implementation

[0028] The present invention will now be described in conjunction with specific embodiments.

[0029] Example 1, as Figures 1 to 3As shown, a novel in-lens shutter structure includes a lower fixing base 1 and an upper cover plate 2 mounted on the upper end of the lower fixing base 1. A blade receiving cavity 3 is formed between the lower fixing base 1 and the upper cover plate 2. The lower fixing base 1 has a vertically penetrating fixing base light-transmitting hole 11, and the upper cover plate 2 has a vertically penetrating cover plate light-transmitting hole 21 aligned with the fixing base light-transmitting hole 11. It should be noted that the upper cover plate 2 and the lower fixing base 1 can be assembled by a snap-fit ​​method; however, the above-mentioned snap-fit ​​method does not constitute a limitation on this embodiment, that is, the upper cover plate 2 in this embodiment can also be assembled to the upper end of the lower fixing base 1 by a screw connection.

[0030] Among them, such as Figure 2 and Figure 3 As shown, the blade receiving cavity 3 is equipped with a middle partition plate 4, a first upper blade 51 located on the upper side of the middle partition plate 4, and a first lower blade 52 located on the lower side of the middle partition plate 4. The first upper blade 51 and the first lower blade 52 cooperate to form the first blade group. The middle partition plate 4 has a vertical through-hole 41 that is aligned with the light-transmitting hole 11 of the fixing seat and the light-transmitting hole 21 of the cover plate.

[0031] Furthermore, such as Figures 1 to 3 As shown, the lower fixed base 1 is equipped with a blade drive assembly 6, which includes a rocker arm 61. The first upper blade 51 and the first lower blade 52 of the first blade group rotate synchronously in opposite directions under the drive of the rocker arm 61.

[0032] Furthermore, such as Figure 2 and Figure 3 As shown, the upper side of the intermediate partition 4 is equipped with a second upper blade 53 stacked with the first upper blade 51, and the lower side of the intermediate partition 4 is equipped with a second lower blade 54 stacked with the first lower blade 52. The second upper blade 53 and the second lower blade 54 cooperate to form a second blade group. The first upper blade 51 and the second upper blade 53 are staggered, and the first lower blade 52 and the second lower blade 54 are staggered. The second upper blade 53 and the second lower blade 54 of the second blade group rotate synchronously in opposite directions under the drive of the crank 61.

[0033] It should be noted that the blade drive assembly 6 in this embodiment is already existing technology. For details, please refer to the Chinese utility model patent with authorization announcement number CN221746400U or the Chinese invention patent with authorization announcement number CN112558377B. The specific structure and working principle of the blade drive assembly 6 in this embodiment will not be described in detail here.

[0034] It should be emphasized that the novel in-lens shutter structure of this embodiment has two blade groups, namely the first blade group composed of the first upper blade 51 and the first lower blade 52, and the second blade group composed of the second upper blade 53 and the second lower blade 54. Under the driving action of the crank 61 of the blade driving assembly 6, the first blade group and the second blade group move synchronously. When the crank is rotated to the closed position, the first upper blade and the first lower blade of the first blade group close and block the light path, and the second upper blade and the second lower blade of the second blade group close and block the light path.

[0035] When the novel in-lens shutter structure of this embodiment 1 closes, the first upper blade 51 and the first lower blade 52 of the first blade group rotate in opposite directions and move closer together to close, and the second upper blade 53 and the second lower blade 54 of the second blade group rotate in opposite directions and move closer together to close. Since the first upper blade 51 and the second upper blade 53 are staggered and the first lower blade 52 and the second lower blade 54 are staggered, the novel in-lens shutter structure of this embodiment 1 closes faster than the single blade group structure design in the prior art.

[0036] In summary, the novel in-lens shutter structure of this embodiment has the advantages of novel structural design and fast closing speed, and can effectively reduce the distortion of object shape when shooting fast-moving objects or rapidly panning.

[0037] Example 2, as Figure 2 and Figure 3 As shown, the difference between this embodiment 2 and embodiment 1 is that the crank 61 is provided with a vertically arranged drive shaft 611, which extends into the blade receiving cavity 3.

[0038] The lower fixed seat 1 is provided with a blade pivot 12 corresponding to the bottom surface of the blade receiving cavity 3, which corresponds to the first upper blade 51, the first lower blade 52, the second upper blade 53, and the second lower blade 54. The first upper blade 51, the first lower blade 52, the second upper blade 53, and the second lower blade 54 are respectively provided with pivot holes 55. The first upper blade 51, the first lower blade 52, the second upper blade 53, and the second lower blade 54 are respectively pivotally connected to the corresponding blade pivot 12 through the pivot holes 55.

[0039] In addition, the first upper blade 51, the first lower blade 52, the second upper blade 53, and the second lower blade 54 are each provided with a vertical through-hole 56, and the drive shaft 611 of the crank 61 passes through the through-hole 56 of the first upper blade 51, the first lower blade 52, the second upper blade 53, and the second lower blade 54.

[0040] It should be explained that the blade pivot 12 and the lower fixed seat 1 in this embodiment are an integral structure.

[0041] During the operation of the first and second blade groups driven by the rocker 61 of the blade drive assembly 6, since the drive shaft 611 of the rocker 61 passes through the elongated holes 56 of the first upper blade 51, the first lower blade 52, the second upper blade 53, and the second lower blade 54, when the rocker 61 rotates, the drive shaft 611 of the rocker 61 drives the ends of the elongated holes of each blade, thereby causing each blade to rotate around the position of its corresponding pivot shaft as its rotation center.

[0042] Example 3 differs from Example 1 in that the edge of the middle partition 4 is fitted between the lower fixing seat 1 and the upper cover plate 2.

[0043] Example 4, as Figure 2 and Figure 3 As shown, the difference between this embodiment four and embodiment one is that: the lower surface of the lower fixing base 1 is provided with a recessed groove 13 that communicates with the light transmission hole 11 of the fixing base, and an IR filter 7 is embedded in the recessed groove 13, and the IR filter 7 is fixed in the recessed groove 13 by adhesive dots.

[0044] The IR filter 7 in this embodiment 4 can achieve the function of infrared light cutoff.

[0045] 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. A novel in-lens shutter structure, comprising a lower fixed seat (1) and an upper cover plate (2) mounted on the upper end of the lower fixed seat (1), wherein a blade receiving cavity (3) is formed between the lower fixed seat (1) and the upper cover plate (2), the lower fixed seat (1) is provided with a vertically penetrating fixed seat light-transmitting hole (11), and the upper cover plate (2) is provided with a vertically penetrating cover plate light-transmitting hole (21) aligned with the fixed seat light-transmitting hole (11); The blade receiving cavity (3) is equipped with a middle partition plate (4), a first upper blade (51) located on the upper side of the middle partition plate (4), and a first lower blade (52) located on the lower side of the middle partition plate (4). The first upper blade (51) and the first lower blade (52) cooperate to form the first blade group. The middle partition plate (4) has a vertical through-hole (41) that is aligned with the light hole (11) of the fixing seat and the light hole (21) of the cover plate. The lower fixed base (1) is equipped with a blade drive assembly (6), which includes a rocker arm (61). The first upper blade (51) and the first lower blade (52) of the first blade group rotate synchronously in opposite directions under the drive of the rocker arm (61). characterized in that The upper side of the middle partition (4) is equipped with a second upper blade (53) stacked with the first upper blade (51), and the lower side of the middle partition (4) is equipped with a second lower blade (54) stacked with the first lower blade (52). The second upper blade (53) and the second lower blade (54) cooperate to form a second blade group. The first upper blade (51) and the second upper blade (53) are staggered, and the first lower blade (52) and the second lower blade (54) are staggered. The second upper blade (53) and the second lower blade (54) of the second blade group rotate synchronously in opposite directions under the drive of the crank (61).

2. A novel inter-mirror shutter structure according to claim 1, characterized in that: The crank (61) is provided with a vertically arranged drive shaft (611), which extends into the blade receiving cavity (3); The lower fixing seat (1) is provided with a blade pivot (12) on the bottom surface of the blade receiving cavity (3) corresponding to the first upper blade (51), the first lower blade (52), the second upper blade (53), and the second lower blade (54). The first upper blade (51), the first lower blade (52), the second upper blade (53), and the second lower blade (54) are respectively provided with pivot holes (55). The first upper blade (51), the first lower blade (52), the second upper blade (53), and the second lower blade (54) are respectively pivotally connected to the corresponding blade pivot (12) through the pivot holes (55). The first upper blade (51), the first lower blade (52), the second upper blade (53), and the second lower blade (54) are also provided with vertical through holes (56), and the drive shaft (611) of the crank (61) passes through the through holes (56) of the first upper blade (51), the first lower blade (52), the second upper blade (53), and the second lower blade (54).

3. A novel inter-mirror shutter structure as claimed in claim 2, wherein: The blade pivot (12) and the lower fixed seat (1) are an integral structure.

4. The novel inter-mirror shutter structure according to claim 1, characterized in that: The edge of the middle partition (4) is fitted between the lower fixing seat (1) and the upper cover plate (2).

5. The novel inter-mirror shutter structure according to claim 1, characterized in that: The lower surface of the lower fixing seat (1) is provided with a recess (13) that communicates with the light-transmitting hole (11) of the fixing seat. An IR filter (7) is embedded in the recess (13) and the IR filter (7) is fixed in the recess (13) by adhesive.

6. A novel inter-mirror shutter structure as claimed in claim 1, wherein: The upper cover plate (2) is fastened to the lower fixing seat (1).

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